• 专利附录
  • 专利说明
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  • 类似技术
  • 同族专利
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  • 优先权
    • 专利摘要:
    The invention provides a method and device for heat recovery from periodically released vapor amounts. The method comprises: - supplying a released quantity of vapor into a condensation vessel, - supplying a first temperature coolant from a second buffer vessel to the condensation vessel to spray the vapor, allow it to condense, and cause it to precipitate together at the bottom of the condensation vessel at a second temperature, - discharging the precipitated liquid to a first buffer vessel and further to a heat exchanger for extracting heat therefrom, and - subsequently storing the precipitated liquid in the second buffer vessel.
    公开号:NL2016611A
    申请号:NL2016611
    申请日:2016-04-15
    公开日:2016-10-17
    发明作者:Paul Christian Feyten Marie；Steenhaut Marc
    申请人:Blue Heat；
    IPC主号:
    专利说明:

    Method and apparatus for heat recovery from periodically released quantities of vapor
    Technical field
    The present invention relates to a method and an apparatus for recovering heat from periodically released quantities of vapor.
    State of the art
    Quantities of vapor released periodically come, for example, from steam peeling processes for peeling tuber fruits such as potatoes, beets and carrots. The tubers are brought under steam pressure in a closed pressure vessel, in order to subsequently blow off the steam in a short time. As a result, the pressure in the pressure vessel decreases rapidly and steam, which is located under the skin of the tubers, will expand rapidly and peel the skin.
    Another source of periodically released quantities of vapor is, for example, the industrial roasting of coffee beans. The coffee beans are roasted for a number of minutes in a fire drum at a high temperature in order to be able to roast as quickly as possible without burning the coffee beans. After the coffee beans are then taken out of the roaster, they are then quickly cooled with water to stop the roasting process of the coffee beans. When cooling with water, a new amount of steam is always released.
    In order not to lose the heat energy stored in the quantities of vapor released, the quantities of vapor released are fed to a device to recover the heat from it.
    Such a device and method for recovering heat from periodically released quantities of vapor is known, for example, from NL 1021988 C2. The device described herein comprises a condensation vessel which is provided for supplying a quantity of vapor released thereto. Furthermore, the device is provided to spray the released amount of vapor supplied to the condensation vessel with a certain amount of cooling fluid at a first temperature to cause the condensable portion of the released amount of vapor to condense on the cooling fluid. The cooling liquid and the condensed vapor hereby reach a second temperature which is approximately equal to the condensation temperature of the vapor. Furthermore, the device comprises a buffer vessel to which the cooling liquid and the condensed vapor is discharged when the condensable portion of the amount of vapor released is condensed on the cooling liquid and both are deposited on the bottom of the condensing vessel. The heated cooling liquid and the condensed vapor are stored in this buffer tank until a new amount of vapor released is supplied to the condensation tank. At this time, the cooling liquid and the condensed vapor from the buffer vessel are passed through a heat exchanger, and this during the period in which the new amount of vapor released is supplied to the condensation vessel. The heat exchanger hereby extracts an amount of heat from the cooling liquid and the condensed vapor in such a way that both are cooled to the first temperature and can be used for spraying the new amount of vapor released. The heat withdrawn from the cooling liquid by the heat exchanger and the condensed vapor heats up a consuming liquid or medium to a third temperature. The heat stored in this consumption fluid can then be used for further consumption, such as in a central heating system.
    However, the disadvantage of using such a device and method is that the third temperature of the consumption fluid is usually not high enough for the use of the consumption fluid in many useful applications. The reason for the low third temperature is that in the short period in which the amount of vapor released is supplied to the condensation tank, the heat exchanger must extract all heat from the cooling liquid and the condensed vapor to cool both from the second temperature to the first temperature. For this reason, the consuming liquid must be supplied to the heat exchanger at a relatively low temperature in order to be able to extract sufficient heat from the cooling liquid and condensed vapor also supplied to the heat exchanger.
    In order to nevertheless achieve a higher third temperature, a larger dimensioned heat exchanger is used, but these, however, have the disadvantage that they are very expensive, and it is therefore economically less interesting to use them.
    Description of the invention
    It is an object of the present invention to provide a method and an apparatus for recovering heat from periodically released amounts of vapor wherein a higher temperature of the consuming liquid can be obtained after the heat exchange with the heated cooling liquid and the condensed vapor in the heat exchanger.
    To this end, the present invention provides a method for recovering heat from periodically released amounts of vapor, the method comprising the steps of: supplying a released amount of vapor into a condensation vessel; - supplying a coolant at a first temperature in an upper part of the condensation tank, and spraying the vapor in the condensation tank with the coolant, such that the vapor condenses on the coolant, and such that the coolant and the condensed vapor precipitate on a lower portion of the condensation vessel at a second temperature that is higher than the first temperature; - discharging the precipitated cooling liquid and the precipitated condensed vapor from the condensation vessel to a first buffer vessel; - discharging the precipitated coolant and condensed vapor from the first buffer vessel to a heat exchanger for extracting heat for further consumption from the coolant and from the condensed vapor; wherein a predetermined amount of the coolant in the upper portion of the condensation tank is supplied from a second buffer tank in which the predetermined amount of the coolant is stored, and wherein the method further comprises the step of storing the coolant coming from the heat exchanger and condensed vapor in the second buffer vessel.
    The use of the second buffer vessel offers the advantage that the amount of precipitated cooling liquid and precipitated condensed vapor in the first buffer vessel does not have to be passed through the heat exchanger during the limited period of time in which the released quantity of vapor is supplied to the condensation vessel and then to the condensation vessel to be supplied as cow liquid. After all, the second buffer vessel allows the precipitated coolant and condensed vapor to be temporarily stored in it after the precipitated coolant and the precipitated condensed vapor have passed through the heat exchanger, and thus the condensed coolant and the condensed vapor need not be supplied directly to the condensation tank after leaving the heat exchanger. As a result, the entire period between the release of two successively released quantities of vapor can be utilized to extract heat from the condensed cooling liquid and the condensed vapor in the heat exchanger, instead of just the period in which a released quantity of vapor is supplied to the condensation vessel.
    By using the second buffer vessel, therefore, more time is available for extracting the heat from the precipitated cooling liquid and the condensed vapor deposited in the heat exchanger, whereby the precipitated cooling liquid and the precipitated condensed vapor is cooled from the second temperature to the first temperature. temperature. There is also more time available to pass on the extracted heat in the heat exchanger to a consumption fluid and to bring this consumption fluid to a third temperature. Because extra time is available for heating the consumption fluid to the third temperature in the heat exchanger, the need for a larger dimensioned heat exchanger to reach a high third temperature disappears.
    The second buffer vessel is preferably different from the first buffer vessel since in such an exemplary embodiment the precipitated cooling liquid and the precipitated condensed vapor originating from the heat exchanger does not lower the temperature of the liquid in the first buffer vessel, as a result of which a higher temperature can be achieved with the aid of the heat exchanger. are being reached.
    In one embodiment of the method according to the present invention, the vapor in the condensation vessel is sprayed with the predetermined amount of cooling liquid during approximately the period in which the released amount of vapor is supplied to the condensation vessel.
    Spraying the vapor in the condensation tank with this coolant during this full period offers the advantage that the entire period in which the amount of vapor released is supplied to the condensation tank is utilized to allow the condensable part of the amount of vapor released to condense on causing the coolant, and the coolant and the condensed vapor to settle on a lower portion of the condensation vessel at the second temperature. The entire period is therefore used to extract heat from the amount of vapor released, so that as little of the available heat as possible is lost in the amount of vapor released.
    In an embodiment of the method according to the present invention, the predetermined amount of cooling fluid is provided to condense about the entire condensable portion of the amount of vapor released to the condensing vessel on the cooling fluid to thereby cool the cooling fluid and the condensed vapor on the second bring temperature.
    The inventors have found that it is advantageous to choose the amount of coolant supplied to the condensation vessel for spraying the vapor in the condensation vessel at a first temperature such that approximately the fully condensable portion of the amount of vapor released condenses on the released vapor, and thereby bringing the cooling liquid and the condensed vapor to second temperature. Hereby all available heat in the amount of vapor released, which heat can be extracted from the amount of vapor released by means of condensation, is completely absorbed by the cooling liquid. In this way, no heat is lost in the amount of vapor released because it is not absorbed by the cooling liquid, and no more cooling liquid is required than is necessary.
    In an embodiment of the method according to the present invention, the second temperature is at most 5 ° C lower than the condensation temperature of the vapor, preferably at most 3 ° C lower than the condensation temperature of the vapor, and more preferably at most 1 ° C lower than the condensation temperature of the vapor.
    It is advantageous that the second temperature at which the cooling liquid and the condensed vapor deposit on the lower part of the condensation vessel approaches the condensation temperature of the vapor as closely as possible. As a result, the second temperature of the precipitated cooling liquid and the condensed vapor deposited is kept high, so that when heat is exchanged in the heat exchanger between on the one hand the precipitated cooling liquid and the precipitated condensed vapor and on the other hand the consuming liquid can also reach a high third temperature for the consuming fluid. After all, in the ideal case the third temperature can be at most equal to the second temperature, and the second temperature can after all be at most equal to the condensation temperature of the vapor. It is therefore advantageous to keep the second temperature of the precipitated cooling liquid and the precipitated condensed vapor as high as possible, so that ultimately a third temperature of the consuming liquid can be reached as high as possible.
    In an embodiment of the method according to the present invention, the heat exchanger is provided to extract an amount of heat from the cooling liquid and the condensed vapor such that the cooling liquid and the condensed vapor are cooled from the second temperature to approximately the first temperature and preferably to the first temperature. the first temperature.
    Providing the heat exchanger such that it can extract sufficient heat from the precipitated coolant and the precipitated condensed vapor to cool the precipitated coolant and the precipitated condensed vapor from the second temperature to the first temperature, offers the advantage that the cooled precipitated coolant and the cooled precipitated condensed vapor can be directly re-used as a cooling liquid for spraying a subsequent amount of vapor that is supplied to the condensation vessel. The precipitated coolant and condensed vapor deposited must therefore no longer be cooled or heated up again to the desired temperature when leaving the heat exchanger.
    In an embodiment of the method according to the present invention, the discharge of the cooling liquid and the condensed vapor from the condensation vessel and via the first buffer vessel to the heat exchanger, and the subsequent storage of the cooling liquid and the condensed vapor in the second buffer vessel, is carried out during the period between the release of two successive releases of vapor.
    The inventors have found that it is advantageous to utilize the full period between the release of two successively released quantities of vapor to extract heat from the precipitated cooling liquid and the condensed vapor deposited through the heat exchanger. Hereby the maximum possible time is used to heat up the consuming liquid in the heat exchanger to the highest possible third temperature by absorbing heat from the precipitated cooling liquid and the condensed vapor deposited. The heat exchanger can hereby be dimensioned as small as possible, which makes it possible to carry out the method according to an embodiment of the present invention in an economically advantageous manner.
    In one embodiment of the method according to the present invention, the method is repeated with a subsequent amount of vapor released.
    The inventors have found that a method according to an embodiment of the present invention is extremely suitable to be carried out again and again with a subsequent quantity of vapor released. The predetermined amount of the precipitated coolant and the condensed vapor precipitated is then stored in the second buffer vessel after being cooled in the heat exchanger, so that they are quickly available for reuse as coolant in a subsequent cycle of the method according to a embodiment of the present invention.
    In an embodiment of the method according to the present invention, the method further comprises the step of adding a chemical agent to the cooling liquid.
    The addition of a chemical agent to the cooling fluid, for example, offers the advantage that an automatic cleaning can be carried out of the various components that are traversed by the cooling fluid when performing the method according to an embodiment of the present invention. The chemical agent can also be used to prevent or at least limit any contamination or damage to the various components that are traversed by the cooling fluid. The person skilled in the art is able to choose the appropriate chemical agent for an intended application.
    In an embodiment of the method according to the present invention, the chemical agent is selected from the group consisting of a cleaning agent for cleaning the parts traversed by the cooling liquid in carrying out the method, an acidity regulator for controlling the acidity of the cooling liquid, an anti-foaming agent to prevent foaming in the cooling liquid and / or to remove molded foam, and an enzymatic solution for breaking down any contamination in the cooling liquid.
    The addition of a cleaning agent as a chemical agent ensures automatic cleaning of the various components that the cooling fluid passes through when carrying out the method according to the present invention, which is advantageous in keeping the components in good condition.
    Depending on the source, the amount of vapor released and therefore also the condensed vapor can be acidic or basic. The acidic or basic amounts of vapor released may potentially cause damage to the parts traversed by any amount of vapor released and the condensed vapor in carrying out the process of the present invention. This makes it advantageous to add an acidity regulator or pH regulator as a chemical agent to neutralize the acidity or pH value of the condensed vapor and the cooling liquid.
    Foam formed on the coolant and the condensed vapor is disadvantageous for efficiently transporting the coolant and the condensed vapor through the various components that are traversed by the coolant in carrying out the method according to an embodiment of the present invention, and is also detrimental to the efficiency of exchanging heat in the heat exchanger. In the case of foaming in the cooling liquid and the condensed vapor, it is therefore certainly advantageous to add an anti-foaming agent to the cooling liquid in order to prevent the above-mentioned problems with foaming.
    The use of an enzymatic solution for breaking down any contamination in the cooling liquid is, for example, important if the quantities of vapor released come from peeling potatoes by means of steam. In this case, the amounts of vapor released contain starch that will settle on the various components that the cooling fluid traverses in carrying out the method according to an embodiment of the present invention. Due to the starch deposition, the passage of the cooling liquid will be impeded and, for example, the efficiency of the heat exchanger will also decrease. It is difficult to filter this starch from the cooling liquid, but by means of an enzymatic solution the starch can be degraded in an advantageous manner so that it will no longer settle.
    In an embodiment of the method according to the present invention, the method further comprises the step of filtering contamination from the precipitated coolant and the precipitated condensed vapor before supplying the precipitated coolant and the precipitated condensed vapor to the heat exchanger.
    Contamination can easily accumulate in a heat exchanger, since close contact is provided over a large area between the circuits that are passed through the liquids or other media between which heat is transferred. It is also not always easy to clean the interior of the heat exchanger and thereby remove the accumulated contamination. Therefore, it is advantageous to already filter the contamination from the precipitated cooling liquid and the condensed vapor deposited before it is supplied to the heat exchanger. This avoids accumulation of contamination in the heat exchanger and the heat exchanger is thus kept in an optimum condition, whereby the heat exchange between the precipitated cooling liquid on the one hand and the condensed vapor deposited on the other hand and the consumption liquid on the other hand can take place optimally.
    This contamination may, for example, be supplied to the buffer vessel together with the amount of vapor released and be deposited together with the cooling liquid and the condensed vapor in the lower part of the condensation vessel. This is possible, for example, if the amount of vapor released comes from a steam peeling process for tubers. The amount of vapor released can entrain part of the peels or other parts of the tubers.
    In an embodiment of the method according to the present invention, the method further comprises the step of discharging an excess amount of the cooling fluid and the condensed vapor, if the amount of the cooling fluid and the condensed vapor is greater than the predetermined amount of the coolant supplied to the condensation tank.
    In carrying out the method according to the present invention, an amount of condensed vapor is always added to the cooling liquid already present when condensing the amount of vapor released on the cooling liquid. As a result, the amount of cooling liquid will continue to increase during the repeated implementation of the method according to an embodiment of the present invention, which amount of cooling liquid is not further used. It is therefore advantageous to provide the method according to an embodiment of the present invention in such a way that the excess amount of the cooling liquid and the condensed vapor can be discharged, so that the method according to the present invention can be carried out with an optimum amount of cooling liquid.
    In an embodiment of the method according to the present invention, the amount of vapor released comprises contamination.
    The inventors have found that the method according to an embodiment of the present invention can also be carried out if the released amounts of vapor contain contamination.
    In an embodiment of the method according to the present invention, the first buffer vessel is integrated in the condensation vessel on the lower part of the condensation vessel.
    The integration of the first buffer vessel in the condensation vessel offers the advantage that no separate vessel needs to be provided for the first buffer vessel. As a result, the precipitated cooling liquid and the precipitated condensed vapor can also be supplied directly to the heat exchanger without an intermediate stop.
    Furthermore, the present invention also provides a device for recovering heat from periodically released quantities of vapor, preferably by means of the method according to the present invention, the device comprising: - a condensing vessel for condensing therein the periodically released quantities of vapor therein a cooling liquid, and wherein the condensation vessel is provided with a cooling liquid supply for supplying the cooling liquid, with a spraying device for spraying the vapor with the cooling liquid, with a vapor supply for supplying the periodically released quantities of vapor, with a condensate discharge for discharging the cooling liquid and condensed vapor and for a ventilation opening for discharging non-condensed vapor and for supplying air; - a first buffer vessel which is in communication with the condensation vessel and which is provided for storing the cooling liquid and the condensed vapor which is discharged from the condensation vessel; and - a heat exchanger in communication with the first buffer vessel for transporting the cooling liquid and the condensed vapor from the first buffer vessel through the heat exchanger, the heat exchanger being provided for extracting heat for further consumption from the cooling liquid and the condensed vapor ; and characterized in that the device further comprises a second buffer vessel which is provided to store a predetermined amount of a liquid, the second buffer vessel communicating with the heat exchanger to store the cooling liquid coming from the heat exchanger in the second buffer vessel and wherein the second buffer vessel is in communication with the condensation vessel for transporting the liquid in the second buffer vessel to the coolant supply of the condensation vessel.
    The device according to the present invention is very advantageous in carrying out the method according to the present invention. The embodiments of the device according to the present invention mentioned below will not all be discussed in detail, since the advantages of these specific embodiments have already been discussed with regard to the above-mentioned embodiments of the method according to the present invention.
    In an embodiment of the device according to the present invention, the second buffer vessel is different from the first buffer vessel.
    In one embodiment of the device according to the present invention, the device is provided for transporting the predetermined amount of the cooling liquid and the condensed vapor from the condensation vessel and through the first buffer vessel through the heat exchanger and subsequently to the second buffer vessel during the period between the release of two successive releases of vapor.
    In an embodiment of the device according to the present invention, the device is provided for transporting the predetermined amount of the cooling liquid from the second buffer vessel to the condensation vessel during the period that the amount of vapor released is supplied to the condensation vessel.
    In an embodiment of the device according to the present invention, the device further comprises an outlet for discharging an excess amount of the cooling liquid and the condensed vapor from the device if the amount of the cooling liquid and the condensed vapor is greater than the predetermined amount of the liquid that can be stored in the second buffer vessel.
    In an embodiment of the device according to the present invention, the device, preferably the condensation vessel or the first buffer vessel, is provided with a agent supply for supplying a chemical agent to the liquid in the condensation vessel or the first buffer vessel respectively.
    In an embodiment of the device according to the present invention, the agent supply is provided for supplying a chemical agent selected from the list consisting of a cleaning agent for cleaning the parts of the device which are provided to allow the liquid to flow through, a acidity regulator for controlling the acidity of the liquid, an anti-foaming agent to prevent foaming in the liquid and / or to remove molded foam, and an enzymatic solution for breaking down any contamination in the liquid.
    In an embodiment of the device according to the present invention, the condensation vessel or the first buffer vessel, insofar as one of these is provided with a agent supply, a flushing discharge for discharging the liquid with the chemical agent, which flushing discharge is connected to the cooling liquid supply of the condensation vessel, this connection being provided for transporting the liquid with the chemical agent in the condensation vessel or the first buffer vessel, respectively, to the spraying device for spraying and thereby cleaning or flushing the condensation vessel using the liquid with the chemical agent.
    The flushing drain communicating with the coolant supply offers the advantage that the condensation tank, and the first buffer tank, if the supply of the bowls and the flushing drain are provided therein, can be cleaned separately from the other components of the device according to the present invention. After all, the contamination is mainly introduced into the condensation vessel together with the quantities of vapor released, and subsequently carried to the first buffer vessel. As a result, in the first instance in the condensation tank, and in the second instance also in the first buffer tank, the majority of the contamination will accumulate or settle.
    In an embodiment of the device according to the present invention, the device further comprises a filter which is provided for filtering contamination from the cooling liquid and the condensed vapor from the condensation vessel, before the cooling liquid and the condensed vapor is supplied to the heat exchanger.
    In an embodiment of the device according to the present invention, the spraying device comprises a plate, or spray plate, which is provided with a plurality of spray openings through which the cooling liquid in the spraying device is sprayed on the vapor in the condensation vessel.
    The inventors have found that with the aid of the spray plate which is provided with a plurality of spray openings, the spraying device is provided in a simple and advantageous manner.
    In an embodiment of the device according to the present invention, the spray plate of the spray device is provided with at least one passage opening which is provided for the passage of non-condensed vapor in the condensation vessel to the ventilation opening, and which is shielded from the coolant.
    The at least one passage opening offers the advantage that a connection remains open between the interior of the condensation vessel and the environment, even if the spray openings of the spray plate are sealed by the cooling liquid. As a result, fresh air can always be drawn in from the environment, and / or excess vapor can always be removed. This prevents, for example, the condensation vessel from exploding or collapsing under the influence of pressure differences caused by the addition and cooling of the amount of vapor released.
    In an embodiment of the device according to the present invention, the first buffer vessel is integrated in the condensation vessel on the lower part of the condensation vessel.
    Brief description of the drawings
    The invention will be explained in more detail below with reference to the following description and the accompanying drawings.
    Figure 1 shows a schematic representation of a device for recovering heat from periodically released amounts of vapor according to an embodiment of the present invention.
    Figure 2 shows the spray plate of a device for recovering heat from periodically released amounts of vapor according to an embodiment of the present invention.
    Embodiments of the invention
    The present invention will be described below with reference to specific embodiments and with reference to certain drawings, but the invention is not limited thereto and is only defined by the claims. The drawings shown here are only schematic representations and are not limitative. In the drawings, the dimensions of certain parts may be shown enlarged, which means that the parts in question are not shown to scale, and this only for illustrative purposes. The dimensions and the relative dimensions do not necessarily correspond to the actual practical embodiments of the invention.
    In addition, terms such as "first", "second", "third", and the like are used in the description and in the claims to distinguish between similar elements and not necessarily to indicate a sequential or chronological order. The terms in question are interchangeable in the appropriate conditions, and the embodiments of the invention may operate in sequences other than those described or illustrated herein.
    In addition, terms such as "top", "bottom", "top", "bottom", and the like are used in the description and in the claims for descriptive purposes and not necessarily to indicate relative positions. The terms thus used are interchangeable in the appropriate conditions, and the embodiments of the invention may operate in orientations other than those described or illustrated herein.
    The term "comprising" and derived terms, as used in the claims, must or must not be interpreted as being limited to the means that are mentioned thereafter; the term does not exclude other elements or steps. The term is to be interpreted as a specification of the listed properties, integers, steps, or components referenced, without excluding the presence or addition of one or more additional properties, integers, steps, or components, or groups thereof. The scope of an expression such as "a device comprising the means A and B" is therefore not only limited to devices that consist purely of components A and B. What is meant, on the other hand, is that, with regard to the present invention, the only relevant components A and B.
    In the context of the present invention, "periodically released quantities of vapor" should preferably be understood to mean approximately equal amounts of vapor which are preferably released from a process at approximately equal intervals, and wherein these approximately equal amounts of vapor are also preferably also released in each case for approximately the same time periods. The vapor may, for example, come from an industrial process such as steam peels or coffee roasts. The type of vapor is not limited to water vapor or steam, but can also be vapors from other substances such as grease vapors, for example. In addition to the periodically released quantities of vapor, there may possibly also be a smaller continuous underflow of released vapor.
    Figure 1 shows a schematic representation of an embodiment of the device according to the present invention for recovering heat from periodically released quantities of vapor.
    On the left-hand side of the figure, the condensation vessel 1 is shown, which is provided for spraying or sprinkling with a cooling liquid a quantity of vapor that is present in the condensation vessel 1, such that the condensable part of the quantity of vapor released condenses on the cooling liquid and together with the cooling liquid precipitates on a lower part of the condensation tank 1. For supplying the amount of vapor released into the condensation tank 1, the condensation tank 1 is provided with a vapor supply 12. The amount of vapor released is, for example, supplied from an industrial process in which a excess amount of vapor is discharged, such as steam peels or roasting coffee beans. It should be noted that in Figure 1 the connection between the vapor supply 12 of the condensation vessel 1 such a source of periodically released amounts of vapor is not shown. The condensation vessel is also provided with a ventilation opening 16 for discharging the non-condensable portion of the released quantity of vapor and any non-condensed portion of the condensable portion of the released quantity of vapor from the condensation vessel 1 to the environment, and for supplying fresh air from the environment into the condensation tank 1. This makes it possible to keep the pressure in the condensation tank 1 and the environment approximately the same, such that collapse or exploding of the condensation tank 1 is avoided.
    The condensation tank 1 further comprises a coolant supply 11 for supplying the coolant to the condensation tank 11, more specifically for supplying the coolant to a spraying device 2 provided in the condensing tank 1. This spraying device 2 comprises in the Fig. 2 shows a spray plate 21 which is arranged in an upper part of the condensation vessel 1, and there forms a seal between this upper part of the condensation vessel 1 and the rest of the condensation vessel 1. The spray plate 21, an embodiment of which is shown in Figure 2 is provided with a plurality of spray openings 22 through which the cooling liquid is passed in the spraying device 2 to spray the vapor present in the condensation tank 1. The cooling fluid is thus supplied on top of the spray plate 21 to subsequently flow through the spray openings 22. The spray plate 21 further comprises at least one passage opening 23, which provides a passage through the spray plate 21 which is open at all times, even if the spray plate 21 is substantially completely covered with the cooling liquid and all spray openings 22 in the spray plate 21 are covered by the coolant. As a result, the non-condensable part of the released quantity of vapor and any non-condensed part of the condensable part of the released quantity of vapor, which is located below the spray plate 21, always have a passage to the ventilation opening 16 of the condensation tank 11. And conversely, air from the environment always has a passage to the part of the condensation tank 1 that is located under the spray plate 21. In the embodiment shown, the at least one passage opening 23 is provided as an opening through the spray plate 21, which is larger than the spray openings 22, and which is surrounded by upright side walls 231. The upright side walls 231 cause a cooling liquid to is located on the spray plate, does not flow through the at least one passage opening 23. If, however, the cooling liquid nevertheless flows over the upright side walls 231, then due to the size of the at least one passage opening 23, sufficient space will still remain for the passage of vapor from the condensation vessel 1 and air from the environment.
    In the embodiment shown, the condensation vessel 1, and more specifically the first buffer vessel 4 integrated in the condensation vessel 1, is provided with a agent supply 13 for supplying a chemical agent to the condensation vessel 1. This chemical agent then mixes with the precipitated cooling liquid and the condensed vapor deposited in the condensation vessel 1, and is transported through the various components of the device according to the present invention together with the precipitated cooling liquid and the precipitated condensed vapor. The chemical agents used are primarily selected for the maintenance of the various components of the device according to the present invention, and for controlling physical and chemical parameters of the fluids flowing through the various components of the device according to the present invention. For example, the chemical agent may be a cleaning agent, an acidity regulator, an antifoaming agent, or an enzymatic solution.
    In the embodiment shown, the condensation tank 1, and more specifically the first buffer tank 4 that is integrated in the condensation tank 1, is also provided with a flushing discharge 15 which is connected to the coolant supply 11 of the condensation tank 1. This connection connects to the connection between the second buffer vessel 5 and the coolant supply 11 of the condensation vessel 1, and can therefore therefore use the second pump 9 to transfer a liquid with chemical agent from the first buffer vessel 4 to the spraying device 2 in the upper part of the condensation vessel 1 to pump. With the necessary valves 40 on these connections it is then controlled from which vessel 4, 5 a liquid is pumped to the coolant supply 11 of the condensation vessel 1. The flushing drain 15 and the connection from the flushing drain 15 to the coolant supply 11 of the condensation tank 1 allow to flush or clean the condensation tank 1 and the first buffer tank 4 separately from the other components of the device according to the present invention with a liquid with a chemical agent. This is advantageous since the condensation tank 1 and the first buffer tank 4 are most exposed to any contamination.
    The cooling liquid is supplied to the condensation vessel 1 from a second buffer vessel 5, different from the first buffer vessel 4, in which a predetermined amount of the cooling liquid is stored at a first temperature. The predetermined amount of coolant and the first temperature are hereby determined such that approximately the entire condensable portion of the released amount of vapor supplied to the condensation tank 1 is condensed on the coolant during spraying of the released amount of vapor with the coolant during the period that the amount of vapor released is supplied to the condensation vessel 1, and wherein the cooling liquid and the condensed vapor precipitate in the lower part of the condensation vessel 1 at a second temperature that is as close as possible to the condensation temperature of the vapor. For supplying the cooling liquid, the second buffer vessel 5 is connected to the vapor supply 12 of the condensation vessel 1, and a first pump 8 is provided on this connection, which ensures that the cooling liquid is moved from the second buffer vessel 5 to the condensation vessel 1. The first pump 8 is provided such that it has a sufficient flow rate for the predetermined amount of cooling liquid from the second buffer tank 4 to the condensation tank 1 during the period that the released amount of vapor is supplied to the condensation tank 1.
    Furthermore, the device of the embodiment shown comprises a first buffer vessel 4 to which the cooling liquid deposited on a lower part of the condensation vessel 1 and condensed vapor deposited is discharged. In the embodiment shown, the first buffer vessel 4 is integrated in the condensation vessel 1 at the lower part of the condensation vessel 1. The first buffer vessel 4 thus forms, as it were, a buffer space on the underside of the condensation vessel 1. The first buffer vessel 4 is provided with a such a volume that preferably the first buffer vessel 4 can contain at least the predetermined amount of cooling liquid and an amount of liquid equal to the condensed condensable part of the amount of vapor released, and this at the second temperature. In other embodiments of the device according to the present invention, the first buffer vessel 4 can also be provided as a separate vessel that is not part of the condensation vessel 1. A connection must then be provided between the condensation vessel 1 and the first buffer vessel 4. This connection can then be provided with a pump for transporting the precipitated cooling liquid and the precipitated condensed vapor from the condensation vessel 1 to the first buffer vessel 4. Alternatively, instead of a pump, it is also possible to simply use gravity to cause the precipitated cooling liquid and condensed vapor to flow or flow from the condensation vessel 1 to the first buffer vessel 4.
    The device of the embodiment shown further comprises a heat exchanger 3. Via this heat exchanger 3, the precipitated cooling liquid and the precipitated condensed vapor, which is stored in the first buffer vessel 4, are supplied to the second buffer vessel 5, and this during the period between the beginning of supplying a first amount of vapor released into the condensation vessel 1 and the beginning of supplying a subsequent amount of vapor released into the condensation vessel 1. The heat exchanger 3 is provided, for example by dimensioning the heat exchanger 3, that during this period an amount of heat is released from the precipitated coolant and condensed vapor that flows through a first circuit 31 of the heat exchanger 3, and a consuming fluid that flows through a second circuit 32 of the heat exchanger 3, which amount of heat the precipitated coolant and the precipitated condenses The first vapor cools from the second temperature to the first temperature. The consumption liquid is herein preferably heated to a third temperature, which is preferably at most 5 ° C lower than the second temperature, more preferably 3 ° C lower than the second temperature, even more preferably 1 ° C lower than the second temperature, and even more preferably, is approximately equal to the second temperature.
    In the embodiment shown, the connection between the first buffer vessel 4 and the heat exchanger 3 is provided with a filter 6 for filtering contamination from the precipitated cooling liquid and the condensed vapor deposited before it is supplied to the heat exchanger 3. This is important in order to avoid accumulation of contamination and ultimately clogging of the heat exchanger 3, such that the efficiency of the heat exchanger for exchanging heat between on the one hand the precipitated cooling liquid and the deposited condensed vapor and on the other hand the consumption liquid remains at the desired level and does not decrease with the use of the device according to the present invention.
    Furthermore, the connection between the first buffer vessel 4 and the heat exchanger 3 also comprises a discharge 7 for excess liquid. This outlet 7 is provided for discharging an excess amount of the precipitated coolant and the precipitated condensed vapor, if the amount thereof is greater than the predetermined amount of coolant that is required to allow the fully condensable part of the released amount of vapor to condense on the cooling liquid when spraying the amount of vapor released in the condensation vessel 1. The discharge 7 can also be provided at a different location, for example after the heat exchanger, for example before the second buffer vessel 5, in order also to reduce the energy of the quantity of liquid to be discharged. to be able to use.
    Furthermore, it should be clear to a person skilled in the art that the connections between the different parts of the device for recovering heat from periodically released quantities of vapor according to the present invention are preferably provided as a fluid connection, i.e. for transporting a liquid, a gas, or both.
    Furthermore, it should also be clear that the various parts of the device according to the present invention and the connections between the various parts of the device according to the present invention are preferably provided with heat insulation to limit heat losses to the environment.
    The method according to an embodiment of the present invention will now be further briefly discussed with reference to Figure 1.
    First, an amount of vapor released is supplied at the bottom of the condensation tank 1 via the vapor supply 12. Simultaneously with the supply of the amount of vapor released to the condensation tank 1, a predetermined amount of coolant with a first temperature is supplied from the second buffer tank 5 via the coolant feed 11 the spraying device 2 at the top of the condensing vessel 1. The predetermined amount of the cooling liquid is supplied to the spraying device 2 for approximately the entire period in which the amount of vapor released is released and is supplied to the condensing vessel 1, such that the amount of vapor released during this entire period from above is sprayed or sprinkled with the coolant. As previously stated, the predetermined amount of the coolant and the first temperature of the coolant are selected such that when spraying the amount of vapor released, approximately the fully condensable portion of the amount of vapor released condenses on the coolant, and such that the coolant and the vapor condensed thereon precipitates on a lower part of the condensation vessel 1 at a second temperature that is as close as possible to the condensation temperature of the vapor.
    After being deposited on a lower part of the condensation vessel 1, the cooling liquid and the vapor condensed thereon flows to the first buffer vessel 4. In the first buffer vessel 4, if desired, a chemical agent can be supplied to the precipitated cooling liquid and the precipitated condensed vapor via the agent supply 13 by means of the third pump 10.
    Subsequently, the precipitated cooling liquid and the precipitated condensed vapor are led by means of the first pump 8 from the first buffer vessel 4 through the heat exchanger 3, and subsequently to the second buffer vessel 5. As mentioned earlier, this is preferably carried out during the entire period between the beginning of supplying the released amount of vapor to the condensation vessel 1 and beginning of supplying a subsequent released amount of vapor to the condensation vessel 1. Hereby the precipitated cooling liquid and the deposited condensed vapor go through a first circuit 31 of the heat exchanger 3 and simultaneously then a consuming liquid flows through a second circuit 32 of the heat exchanger 3 at a temperature which is lower than the second temperature of the precipitated cooling liquid and the condensed vapor deposited. As a result, heat from the precipitated coolant and the precipitated condensed vapor is transferred to the consumption fluid in the heat exchanger 3, such that the consumption fluid heats up to a third temperature which is preferably approximately equal to the second temperature of the precipitated coolant and the precipitated condensed vapor and such that the precipitated coolant and the condensed vapor precipitated cools to the first temperature.
    Before being supplied to the heat exchanger 3, any contamination from the precipitated cooling liquid and the precipitated condensed vapor is filtered through the filter 6 provided for this purpose. In the shown embodiment of the device according to the present invention, there may also be at the level of this filter surplus part of the liquid present in the device is discharged from the device via the drain 7 provided for this purpose for excess liquid.
    After passing through the heat exchanger 3, a predetermined amount of the precipitated cooling liquid and the precipitated condensed vapor is stored in the second buffer vessel 5 at a first temperature, such that in the second buffer vessel 5 there is again a predetermined amount of cooling liquid for repeating the above-described cycle upon supplying a subsequent amount of vapor released into the condensation vessel 1.
    The consumption fluid is further utilized to extract heat therefrom for various applications in a consumption installation, part of which is shown in Figure 1 by way of example. This portion comprises a storage vessel 20 in which the consumption fluid is stored, at the top at the third temperature, and at the bottom at a temperature lower than this third temperature. The consuming liquid at the bottom of the storage vessel 20 is pumped through the heat exchanger 3 by means of a pump 30 and, as described above, is thereby heated to the third temperature, and then supplied to the upper part of the storage vessel 20. At the upper part of the storage vessel 20 a drain 201 is provided along which the consumption fluid is supplied to a further part of the consumption installation, such as, for example, radiators of a heating installation. And at the bottom of the storage tank 20, a supply 202 is provided for supplying consumption liquid after it has cooled down during the passage through the further part of the consumption installation.
    List of reference numbers: 1 condensation tank 11 coolant supply 12 vapor supply 13 condensate drain 14 condensate drain 15 rinse outlet 16 ventilation opening 2 sprayer 21 spray plate 22 spray openings 23 passage opening 231 upright side walls passage opening 3 heat exchanger 31 first circuit heat exchanger 32 second circuit heat exchanger 4 first buffer tank 5 second buffer tank 5 second buffer tank 5 second buffer tank 5 second buffer tank 5 second buffer tank 5 6 filter 7 drain excess liquid 8 first pump 9 second pump 10 third pump 20 storage vessel consumption installation 201 drain storage vessel 202 supply storage vessel 30 pump consumption installation 40 valves
    权利要求:
    Claims (26)
    [1]
    A method for recovering heat from periodically released quantities of vapor, the method comprising the steps of: - supplying a released quantity of vapor at the bottom into a condensation vessel (1); - supplying a cooling liquid at a first temperature in an upper part of the condensing vessel (1), and spraying the vapor in the condensing vessel (1) with the cooling liquid, such that the vapor condenses on the cooling liquid, and such that the precipitating coolant and the condensed vapor on a lower portion of the condensation vessel (1) at a second temperature that is higher than the first temperature; - discharging the precipitated cooling liquid and the precipitated condensed vapor from the condensation vessel (1) to a first buffer vessel (4); - discharging the precipitated coolant and condensed vapor from the first buffer vessel (4) to a heat exchanger (3) for extracting heat for further consumption from the coolant and from the condensed vapor; - the removal of non-condensed vapor and the supply of air via a ventilation opening (16); characterized in that a predetermined amount of the cooling liquid in the upper portion of the condensing vessel (1) is supplied from a second buffer vessel (5) in which the predetermined amount of the cooling liquid is stored, and in that the method further comprises the step of storing the cooling liquid and condensed vapor coming from the heat exchanger (3) in the second buffer vessel (5).
    [2]
    The method of claim 1, wherein the second buffer vessel (5) is different from the first buffer vessel (4).
    [3]
    The method according to claim 1 or 2, wherein the vapor in the condensation vessel (1) is sprayed with the predetermined amount of cooling liquid during approximately the period in which the amount of vapor released is supplied to the condensation vessel (1).
    [4]
    The method according to any of the preceding claims, wherein the predetermined amount of cooling fluid is provided to condense about the entire condensable portion of the amount of vapor released to the condensing vessel (1) on the cooling fluid to thereby cool the fluid and to bring the condensed vapor to the second temperature.
    [5]
    The method according to any of the preceding claims, wherein the second temperature is at most 5 ° C lower than the condensation temperature of the vapor, preferably at most 3 ° C lower than the condensation temperature of the vapor, and more preferably is not more than 1 ° C lower than the vapor condensing temperature.
    [6]
    The method according to any of the preceding claims, wherein the heat exchanger is provided to extract an amount of heat from the cooling liquid and the condensed vapor such that the cooling liquid and the condensed vapor are cooled from the second temperature to approximately the first temperature and preferably up to the first temperature.
    [7]
    The method according to any of the preceding claims, wherein discharging the cooling liquid and the condensed vapor from the condensation vessel (1) and via the first buffer vessel (4) to the heat exchanger (3), and subsequent storage of the cooling liquid and the condensed vapor in the second buffer vessel (5) is conducted during the period between the release of two successive releases of vapor.
    [8]
    The method according to any of the preceding claims, wherein the method is repeated with a subsequent amount of vapor released.
    [9]
    The method of any one of the preceding claims, wherein the method further comprises the step of adding a chemical agent to the cooling fluid.
    [10]
    The method according to the preceding claim, wherein the chemical agent is selected from the group consisting of a cleaning agent for cleaning the parts traversed by the cooling fluid in carrying out the method, an acidity regulator for controlling the acidity of the cooling liquid, an anti-foaming agent to prevent foaming in the cooling liquid and / or to remove molded foam, and an enzymatic solution for breaking down any contamination in the cooling liquid.
    [11]
    The method of any one of the preceding claims, wherein the method further comprises the step of filtering contamination from the precipitated coolant and the precipitated condensed vapor before supplying the precipitated coolant and the precipitated condensed vapor to the heat exchanger (3) ).
    [12]
    The method of any one of the preceding claims, wherein the method further comprises the step of discharging an excess amount of the coolant and the condensed vapor, if the amount of the coolant and the condensed vapor is greater than the predetermined amount of the coolant supplied to the condensation tank (1).
    [13]
    The method of any one of the preceding claims, wherein the amount of vapor released comprises contamination.
    [14]
    The method according to any of the preceding claims, wherein the first buffer vessel (4) is integrated in the condensation vessel (1) on the lower portion of the condensation vessel (1).
    [15]
    A device for recovering heat from periodically released amounts of vapor by means of the method according to any of the preceding claims, the device comprising: - a condensing vessel (1) for condensing therein the periodically released amounts of vapor on a cooling liquid and wherein the condensation vessel is provided with a coolant supply (11) for supplying the coolant in an upper part of the condensation vessel (1), with a spraying device (2) for spraying the vapor with the coolant, with a second (12) supply for supplying the periodically released quantities of vapor at the bottom of the condensation vessel (12), a condensate discharge (14) for discharging the cooling liquid and condensed vapor and a ventilation opening (16) for discharging non condensed vapor and for supplying air; - a first buffer vessel (4) which is in communication with the condensation vessel (1) and which is provided for storing the cooling liquid and the condensed vapor which is discharged from the condensation vessel (1); and - a heat exchanger (3) in communication with the first buffer vessel (4) for transporting the cooling liquid and the condensed vapor from the first buffer vessel (4) through the heat exchanger (3), the heat exchanger (3) being provided for extracting heat for further consumption from the coolant and the condensed vapor; and characterized in that the device further comprises a second buffer vessel (5) which is provided for storing a predetermined amount of a liquid, the second buffer vessel (5) communicating with the heat exchanger (3) to remove the heat exchanger from the heat exchanger (3) storing incoming cooling liquid in the second buffer vessel (5), and wherein the second buffer vessel (5) is in communication with the condensation vessel (1) for transporting the liquid in the second buffer vessel (5) to the cooling liquid supply ( 11) of the condensation vessel (1).
    [16]
    The device according to the preceding claim, wherein the second buffer vessel (5) is different from the first buffer vessel (4).
    [17]
    The device according to claim 15 or 16, wherein the device is provided to transport the predetermined amount of the cooling liquid and the condensed vapor from the condensation vessel (1) and through the first buffer vessel (4) through the heat exchanger (3) and subsequently to the second buffer vessel (5) during the period between the release of two successive releases of vapor.
    [18]
    The device of any one of claims 15-17, wherein the device is provided to transport the predetermined amount of the cooling fluid from the second buffer vessel (5) to the condensation vessel (1) during the period that the amount of vapor released is supplied to the condensation vessel (1).
    [19]
    The device according to any of claims 15-18, wherein the device further comprises a drain (7) for discharging from the device a surplus amount of the cooling liquid and the condensed vapor, if the amount of the cooling liquid and the condensed vapor is greater than the predetermined amount of the liquid to be stored in the second buffer vessel (5).
    [20]
    The device according to any of claims 15-19, wherein the device, preferably the condensation vessel (1) or the first buffer vessel (4), is provided with a agent supply (13) for supplying a chemical agent to the liquid in the condensation vessel (1) or the first buffer vessel (4), respectively.
    [21]
    The device according to the preceding claim, wherein the agent supply (13) is provided for supplying a chemical agent selected from the list consisting of a cleaning agent for cleaning the parts of the device provided for leaving the liquid there through, an acidity regulator for controlling the acidity of the liquid, an anti-foaming agent to prevent foaming in the liquid and / or to remove molded foam, and an enzymatic solution for breaking down any contamination in the liquid.
    [22]
    The device according to claim 20 or 21, wherein the condensation vessel (1) or the first buffer vessel (4), insofar as one of these is provided with a supply of agents (13), comprises a flushing discharge (15) for discharging the liquid with the chemical agent, which flushing outlet (15) is in communication with the coolant supply (11) of the condensation vessel (1), said connection being provided for transporting the liquid with the chemical agent in the condensation vessel (1) or the first buffer tank (4) to the spraying device (2) for spraying and thereby cleaning or flushing the condensation tank (1) using the liquid with the chemical agent.
    [23]
    The device according to any of claims 15-22, wherein the device further comprises a filter (6) provided for filtering contamination from the cooling liquid and the condensed vapor from the condensation vessel (1), before the coolant and the condensed vapor is supplied to the heat exchanger (3).
    [24]
    The device according to any of claims 15-23, wherein the spraying device (2) comprises a plate (21), or spray plate (21), which is provided with a plurality of spray openings (22) through which the cooling liquid enters the spraying device (2) is sprayed onto the vapor in the condensation vessel (1).
    [25]
    The device according to the preceding claim, wherein the spray plate of the spraying device (2) is provided with at least one passage opening (23) which is provided for passing non-condensed vapor in the condensation vessel (1) to the ventilation opening (16), and which is shielded from the coolant.
    [26]
    The device according to any of claims 15-25, wherein the first buffer vessel (4) is integrated in the condensation vessel (1) on the lower portion of the condensation vessel (1).
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    同族专利:
    公开号 | 公开日
    NL2016611B1|2017-01-25|
    BE1023117A1|2016-11-23|
    BE1023117B1|2016-11-23|
    引用文献:
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    NL1033293C2|2007-01-26|2009-11-11|Solutherm B V|Method for steam peeling of e.g. crops, involves placing peeled crops in contact with steam at predetermined time, where pressure is reduced to atmospheric pressure during release phase|
    NL1036751C2|2009-03-23|2010-09-27|Kiremko Bv|DEVICE AND METHOD FOR CONDENSING PERIODICALLY RELEASE QUANTITIES.|
    EP2309218A1|2009-10-06|2011-04-13|BMA Nederland B.V.|Recovery of heat from recurring charges of vapour|
    NL2004726C2|2010-05-17|2011-11-21|Solutherm B V|METHOD AND DEVICE FOR CONDENSING VAPORIZES.|
    DE102012220199A1|2012-11-06|2014-05-08|Efficient Energy Gmbh|Condenser, liquefying process and heat pump|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    BE20155240A|BE1023117B1|2015-04-15|2015-04-15|Method and device for heat recovery from periodically released quantities of vapor|
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