• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a process for adding additives in a sludge briquette, which is used to increase the dry matter content and reduce the bacterial content in the sludge briquette. A characteristic of the invention is that one or more desired additives are added to the sludge briquette in connection with separation. The invention also relates to an equipment for adding additives in a sludge briquette to carry out the process according to claim 1. A characteristic of the equipment is that it consists of one or more additives (4) where additives can be stored and from which the additives can be dosed.
    公开号:FI20187030A1
    申请号:FI20187030
    申请日:2018-03-05
    公开日:2019-09-06
    发明作者:Antti Ranta
    申请人:Rannan Teollisuuskone Oy；
    IPC主号:
    专利说明:

    METHOD OF ADDITIONAL MATERIAL FOR SLUDGE PRESSURE AND METHOD FOR IMPLEMENTING THE METHOD
    FIELD OF THE INVENTION
    The present invention relates to a method for further adding a sludge compact which is used to increase the dry matter content of the sludge press and to reduce the bacterial content. The invention also relates to an apparatus for adding additional material to a slurry press in order to implement a method for adding a slurry press.
    BACKGROUND OF THE INVENTION
    The sludge press currently used as livestock bedding often remains too wet after press drying, especially for use in cold conditions, suitable additives can be used to increase the dry matter content of the sludge press, making the sludge press suitable for livestock bedding even in cold conditions. Slurry is also referred to as dry matter. The sludge press is used for many purposes depending on the ingredients of the sludge press, the applications are, for example, plant soil and fertilizer, the sludge press is burned to obtain heat, etc.
    Drying of the slurry is performed by compression drying or separation. The separator is also called a separator. The separator separates the liquid and dry matter reject from the slurry, i.e. the dry matter. Such sludge can be of agricultural, industrial, community or water origin. Several devices from different suppliers are already known on the market for so-called sludge separation, i.e. separation of liquid and dry matter.
    Such devices also have different operating principles. Thus, on the other hand, there are roller press separators in which the sludge is conveyed on an inclined plane, squeezing the liquid from the sludge via the conveyor rollers. In addition, centrifugal separators are known, called centrifugal separators.
    On the other hand, press separators are known in which liquid is squeezed from the slurry mainly using a screw conveyor and, for example, a torn cylinder. a roller compactor
    0 a relatively moist and cold dry matter is obtained, the composting of which is moderately slow. Press separators, in turn, produce warm, rapidly compostable dry matter, according to industry publications. Separating the sludge can be a sludge
    20187030 prh 05 -03- 2018 considerably reduces the load caused to the environment, because in this way most of the nitrogen accumulated in the sludge can be removed, while the phosphorus remains mainly in the dry matter.
    One basic structure of a press separator is disclosed, for example, in Finnish patent F1 6,370, corresponding to, for example, U.S. Pat. No. 4,003,304. This publication discloses an apparatus with a screw conveyor surrounded by a cylindrical perforated screen tube, to which sludge is guided into the screen tube. Driven by the screw, a liquid reject and a dry matter reject are separated from the sludge on the one hand.
    The use of a press separator in an agricultural environment is described, for example, in DE 4343739. This publication shows how sludge is pumped from a sludge tank to a press separator for treatment. The separated liquid is recovered for reuse and the dry matter can be directed to incineration, for example.
    CURRENTLY THE SLUDGE PRESS IS DRIED AND THE BACTERIAL CONTENT IS REDUCED:
    Organic (sludge compacted) material can be dried and sanitized by composting if sufficient carbon and nitrogen are present. The compost must be fluffy and there must be adequate ventilation to evaporate the moisture. Composting stops as the moisture content decreases. Composting can be an intermediate step in the drying process. Calcium can be added after composting. Efforts have been made to evaporate the liquid by thermal drying.
    Disadvantages of the current solution:
    Fast and efficient drying methods are investment and expensive to operate. Open composting is sensitive to weather conditions.
    Closed composters, e.g. drum composts, require a significant investment and the moisture content of the product still remains above 50%.
    OBJECT OF THE INVENTION
    The object of the invention is that the additive (s) can be added to the sludge compact during separation.
    20187030 prh 05 -03- 2018
    The above drawbacks can be eliminated and the objects described above are achieved by the slurry extrusion addition method according to the invention, which is characterized by what is defined in the characterizing part of claim 1. Preferred embodiments of the supplementary material method are the subject of dependent claims 2-11. The above drawbacks can be eliminated and the above-mentioned objects are achieved by carrying out the method of the slurry extruder addition method according to the invention with a slurry extruder addition apparatus characterized by what is defined in the characterizing part of claim 12. Preferred embodiments of the supplemental material apparatus are the subject of claims 13 and 14.
    DESCRIPTION OF THE INVENTION
    The main advantage of the invention is that the moisture content of the slurry is reduced and the shelf life of the slurry is improved by additional material. The additives used depend on the properties of the desired end product. As additives, e.g. calcium, lime, wood ash in various forms, wood chips or shavings, paper shavings, sand and the like are known substances. The invention has the advantage of lowering the moisture of the slurry and improving the thermal insulation capacity, which improves the drying properties. Calcium makes the extrudate alkaline, killing bacteria. Lime has been used for sanitation for ages, lime kills bacteria up to fly larvae. The invention is not limited to improving the properties of the bedding in general, but generally to lifting the dry matter and improving the shelf life of the sludge compact. Reducing moisture increases the calorific value. Calcium and calcium carbonate do not burn Calcium carbonate decomposes on burning into quicklime, binding heat, ie calcium carbonate must be screened off before burning. Potassium-containing wastes are generated in industry and in the incineration of industrial wastes, for example calcium carbonate and wood-based fiber are present in the by-product of the deinking pulp of recovered paper. When the fiber is burned, the calcium carbonate decomposes into quicklime and remains in the ash. It is clear that thanks to the invented sludge compact addition method, great cost savings are achieved in the use of the sludge compact.
    LIST OF FIGURES
    In the present figures, the parts of the invention related thereto are not shown to scale, but the figures are schematic, illustrating the basic structure and operation of the preferred embodiment of the invention and its parts.
    20187030 prh 05 -03- 2018
    The invention will now be described with reference to the accompanying drawings, in which Figure 1 shows an additive feeding device according to the invention connected to a separator, perpendicular to the side, Figure 2 shows another additive feeding device a mixer, seen perpendicularly from the side, Fig. 3 shows a third additiveing apparatus according to the invention, in which the slurry leaving the separator is transferred by a connecting member to a mixing member a mixing member to which the additive is transferred from the additive through the feeder to the mixing member, the mixing member the additive is removed! with a discharge conveyor, perpendicular to the side.
    DETAILED DESCRIPTION OF THE INVENTION
    The parts of the invention shown in the present figures are not shown to scale, but are schematic, illustrating the basic structure and operation of the preferred embodiment of the invention and its parts.
    The pictures have the following sections and sections.
    Separator 1 with inlet end 1a, discharge end Ib, one or more separating parts 1c, one or more partitions Id, one or more transfer screws le, one or more screen parts If, one or more seals Ih, one or more liquid outlets li, one or more to the transfer screw le the shaft Ij and one or more rotating means Ik e.g. an electric motor with a gear or an internal combustion engine which rotates one or more shafts IjSeparator 1, from the inlet end 1a the slurry is conveyed by the transfer screw le to the separating part 1c where the liquid separates out due to the liquid pressure rise in the separation section caused by the sealer Ih, whereby the liquid is forced through the screen section If into the jacket Ica of the separation section 1c. From the jacket of the separating part 1c, the liquid drains out through the liquid outlet li, from which the liquid is directed / pumped to the desired location.
    20187030 prh 05 -03- 2018
    The separator 1 has an inlet member laa, it is an opening / hole into which the sludge to be separated is most often pumped along a pipe (or otherwise known to be transferred, e.g. by a screw conveyor or a cola conveyor).
    The separator 1 has a discharge head Ib from which the dry matter or sludge compact exits through the discharge means Iba from the separator 1. The above-mentioned discharge element Iba from this discharge element Iba the sludge extruder exits inside the separator 1, the discharge element Iba is an opening from which the sludge is drained the liquid is separated from the solid
    The separator 1 has one or more partitions Id, in which partition (s) there is an opening for the transfer screw le.
    The screen portion If of the separator 1 may be, for example, a screen portion known from the utility model publication F1 8635.
    The sealer Ih of the separator 1 can be, for example, a spring-loaded back pressure plug known from the utility model publication F1 8635.
    The dewatering member li of the separator 1 is a pipe connection to which the dewatering pipe can be connected.
    The separator 1 has a shaft Ij for rotating the transfer screw le by the rotating member Ik.
    The separator 1 has one or more rotating means Ik which rotate / rotate one or more transfer screws le by means of the shaft Ij, the rotating means Ik being e.g. a known electric motor equipped with a gear, the gear being connected to rotate the shaft Ij by a toggle switch.
    Liquid 2 is a liquid that is squeezed out of the sludge.
    The mixing member 3, may be a separate device or part of the separator 1 as in Figures 1 and 3 or part of the separator 1 as in Figure 2, mixing vanes can be placed on the shaft Ij of the transfer screw le after the sealer Ih, as in known dry concrete mixing screws,
    20187030 prh 05 -03- 2018 dry concrete is mixed with water. In Figures 1 and 3, the mixing element 3 consists of, for example, a known concrete mixing bucket suitable for the intended use (e.g. a concrete mixing bucket sold by KONEKORJAAMO A VAINIKKA Oy https://konetalovainikka.fi/tuote/betonikauha-2/), the concrete mixing bucket has a mixing coil rotated by a hydraulic motor, the mixing coil mixes the material placed in the concrete mixing bucket into a uniform mass / substance. The concrete mixing bucket has an opening at the bottom which can be opened and closed as desired, the material mixed from the opening can be drained to the desired location, the location of the opening can be selected as desired.
    Parts of the mixing member 3, body 3a, mixer 3b, rotator 3c, outlet 3d, filling opening 3e and additive opening 3f.
    The additive material 4 in the figure is an additive container provided with a known feeder 4a at the bottom, which is a shut-off feeder in Figures 1, 2 and 3, the shut-off feeder draining the desired amount of additive to the mixing member 3 as the feeder 4a is a rotation arrow 4b. In Fig. 4, the feeder 4a is a known screw feeder, cola feeder, belt feeder and the like. The additive material 4 can even be an open silo, the material of the additive determines which of the additives) aa 4 is used.
    One or more connecting members 8 can be used between the separator 1, the mixing element 3 and the additives 4 and 4, as shown in Fig. 3. The connecting member 8 may be a known transfer screw, a cola conveyor or other similar device for transferring solids. In Figure 4, the connecting member is a belt conveyor, which may be equipped with or without transverse Koli (transverse parts which force the product to move in the desired direction).
    The figures show the direction of travel of the dry matter 5, the direction of travel of the additive 6, the direction of movement of the dry matter 7
    The one or more connecting members 8 may be a known belt conveyor, a cola conveyor, a screw conveyor or another known conveyor.
    One or more discharge conveyors 9 transport the finished material to the desired location in the desired location, e.g. for bagging, etc. The discharge conveyor 9 may be as shown in Fig. 4.
    20187030 prh 05 -03- 2018 unlike a screw conveyor (the screw rotator 9a of the screw conveyor is e.g. an electric motor with or without a deceleration gear) also some other known conveyor such as a belt conveyor, a cola conveyor and the like.
    The present invention relates to a method for further adding a sludge compact which is used to increase the dry matter content of the sludge press and to reduce the bacterial content.
    It has now been found that in connection with the separation, one or more desired additives are added to the slurry compact. According to an inventive embodiment, the additive is added to the slurry between the slurry without stopping.
    According to another inventive embodiment, the additive is added to the separator 1 at its discharge end Ib after the compactor Ih, in which concentrate Ih the slurry is compressed into a slurry press as shown in Fig. 2, where the additive is mixed with a separator 1-dried slurry compactor on the shaft Ij of the separator 1 with several mixing threads or mixing protrusion (s).
    According to an inventive structure, the additive is added from one or more of the 20 additives 4 to the separator 1 or to the mixing element 3.
    According to an inventive structural solution, the additive is added from a plurality of additive ingredients 4 to a separator 1 or a mixing member 3, where each of the additives 4 may contain a different additive.
    According to an inventive structural solution shown in Figures 1, 3 and 4, the slurry compact is transferred from the separator 1 by one or more connecting members 8 to one or more mixing members 3.
    According to an inventive structural solution shown in Figures 1, 3 and 4, the additive is transferred from one or more additive ingredients 4 by one or more feeders 4a to one or more mixing elements 3.
    According to an inventive embodiment, the additive is a calcium-containing substance CaO
    20187030 prh 05 -03- 2018 calcium oxide, quicklime, which robs -OH groups of water, decomposing water and forming slaked lime Ca (OH) 2, calcium hydroxide further reacts with oxygen to form calcium carbonate Ca-CO3, slaked lime or slaked lime.
    According to one inventive embodiment, the additive is ash or wood chips or sand.
    In order to carry out the inventive method, the sludge compact additive addition apparatus consists of one or more additive ingredients 4, in which the additive can be stored and from which the additive can be dispensed, by one or more feeders 4a. The additive material 4 is a container with one or more feeders 4a, which feeder 4a feeds the desired amount of additive to the separator 1 or the mixing member 3. The additive material 4 can be a closed container / space or an open tank / space.
    Preferably, the additive material 4 is provided with anti-vault equipment, such as compressed air piping, from which compressed air can be produced to prevent vaulting and to allow the additive to drain.
    USE OF THE INVENTION
    The invention is used as a known separator 1. The additive is added to the slurry compact as described above. The sludge compact may be a known substance to be dried and additives.
    The application examples presented above are in no way intended to limit the invention, but the invention can be modified completely freely within the scope of the claims. Thus, it is clear that the arrangement according to the invention or its parts do not necessarily have to be exactly as shown in the figure, but other solutions are also possible within the limits of the claims.
    权利要求:
    Claims (14)
    [1]
    1. Method for the addition of sludge press used in the drying of sludge press
    5 to increase the substance content and to reduce the bacterial content, characterized in that the desired one or more additives are added to the sludge compact during the separation.
    [2]
    A method for adding a slurry compact according to claim 1, characterized in that the additive is added to the slurry compact between the slurry compact.
    10 without stopping.
    [3]
    A method for adding a slurry compact according to claim 1, characterized in that the additive is added to the separator (1) at its discharge end (Ib) after the compactor (Ih), in which compactor (Ih) the slurry is compressed into a slurry compact.
    [4]
    Method for adding slurry compact according to one of Claims 1 to 3, characterized in that the additive is mixed with the separator (1) dried slurry on the shaft (Ij) of the transfer screw (1) of the separator (1) by one or more mixing threads after the compactor (Ih), or
    With 20 mixing projections / mixing projections.
    [5]
    Method for adding a slurry press according to claim 1, characterized in that the additive is added to the slurry press in one or more mixing elements (3).
    [6]
    Method for adding a slurry compact according to claim 1, characterized in that the additive is added to the separator (1) or to the mixing element (3) from one or more additives (4).
    30
    [7]
    Method for adding a slurry press according to Claim 6, characterized in that the additive is added from a plurality of additives (4) to the separator (1) or to the mixing element (3), each of the additives (4) having a different additive.
    [8]
    A method for adding a slurry compact according to claim 6,
    20187030 prh 05 -03- 2018
    10 characterized in that the sludge compact is transferred from the separator (1) by one or more connecting members (8) to one or more mixing members (3).
    [9]
    Method for additive addition of sludge compact according to Claim 6, characterized in that the additive is transferred from one or more additive ingredients (4) by means of one or more feeders (4a) to one or more mixing elements (3).
    [10]
    A method for adding a slurry press according to claim 1, characterized in that the additive is a calcium-containing substance CaO calcium oxide, quicklime which robs -OH groups of water, decomposing water and forming slaked lime Ca (OH) 2, calcium hydroxide further reacts with oxygen to form calcium carbate CO3, slaked lime or quicklime.
    [11]
    A method for adding a sludge compact according to claim 1, characterized in that the additive is ash or wood chips or sand.
    [12]
    To carry out the method according to claim 1, a slurry press additive addition apparatus, characterized in that the additive addition additive apparatus consists of one or more additive ingredients (4) in which the additive can be stored and from which the additive can be dispensed.
    [13]
    Additive addition device according to Claim 10, characterized in that the additive (4) is a container with one or more feeders (4a) which feed the desired amount of additive to the separator (1) or mixing element (3).
    [14]
    A method for adding material to a sludge compact according to claim 10, characterized in that the additional material (4) is provided with an anti-vault device, such as compressed air piping, from which compressed air can be produced to prevent vault and allow the additive to drain.
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    同族专利:
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    FI128777B|2020-12-15|
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