• 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:
    A process for mixing material streams of varying solids content comprising finely divided organic material with a liquid stream in a mixing vessel maintaining a predetermined degree of filling via a free liquid surface. The feature of the invention is that the flow of material is supplied from an inlet and down a sliding slab below the free liquid surface, where one, about a rotary shaft of propeller stirrer and a coaxially arranged pipe piece disposed relative to the rotary shaft of the propeller stirrer, is formed. of a predetermined flow pattern in the mixing vessel.
    公开号:DK201770315A1
    申请号:DKP201770315
    申请日:2017-05-08
    公开日:2018-05-28
    发明作者:Henrik Kjeldgaard Hansen
    申请人:Xergi As；
    IPC主号:
    专利说明:

    < 1 θ> DENMARK < 1 °> DK 2017 70315 A1
    < 12 > PATENT APPLICATION
    Patent and
    Trademark Office (51) ID: B 01 F 15/02 (2006.01)
    B 01 D 21/02 (2006.01)
    B 01 F 7/02 (2006.01) (21) Application Number: PA 2017 70315 (22) Filing Date: 2017-05-08 (24) Running Day: 2017-05-08 (41) Aim. available: 2018-05-12 (30) Priority: 2016-11-11 DK PA 2016 70892 (71) Applicant: Xergi A / S, Hermesvej 1,9530 Støvring, Denmark (72) Inventor: Henrik Kjeldgaard Hansen, Ingstrupvej 45, 9700 Brønderslev, Denmark (74) Plenipotentiary: PATENT NORD ApS, Østergade 36, 9400 Nørresundby, Denmark (54) Title: Process for mixing material flow with varying solids content including finely divided organic material with a liquid stream and mixing plant (56) Published publications:
    WO 9814258 A1 US 6197190 B1 DE 19526375 A1 US 2014209523 A1 EP 1362635 A1 (57) Summary:
    A process for mixing material streams of varying solids content comprising finely divided organic material with a liquid stream in a mixing vessel maintaining a predetermined degree of filling via a free liquid surface. The particular feature of the invention is that the flow of material is fed from an inlet and down a sliding slab below the free liquid surface, where one, about a rotary shaft of propeller stirrer, and a pipe piece coaxially disposed relative to the rotary shaft of the propeller stirrer, is formed. of a predetermined flow pattern in the mixing vessel.
    To be continued ...
    DK 2017 70315 A1
    DK 2017 70315 A1
    Process for mixing material streams of varying solids content comprising finely divided organic material with a liquid stream and mixing plant.
    It is known to mix finely divided organic matter of varying solids content with a liquid stream in a mixing vessel, to supply liquid stream and the finely divided organic material to the mixing vessel with a liquid surface in which an agitator is placed below the liquid surface to agitate the liquid, is worked into the liquid to form a slurry.
    The invention provides an improved mixing process in which sand, gravel, stone and metal elements and corresponding impurities are also disposed of.
    The object of the invention is met by a method of the type set forth in the preamble of claim 1, characterized in that the material flow and the flow of liquid are supplied from an inlet and down a sliding slab below the free liquid surface, where a propeller stirrer feeds the mixture. a flow relative to the axis of rotation of said propeller stirrer through a coaxially disposed tube piece relative to the axis of rotation, to form a predetermined flow pattern in the mixing vessel.
    It is possible to arrange either the propeller stirrer or the tube piece slidable in the axial direction, but it is preferred to arrange the propeller stirrer so that it cannot be displaced in the axial direction with respect to a fixed tube piece. It is desirable that the propeller stirrer be enclosed at least in part by the tubular member, and therefore the tubular member has an inner diameter exceeding the diameter of the propeller stirrer wings or blades. By these measures, it is ensured that the propeller stirrer sends a flow of material through the pipe and that a pipe is formed around the pipe.
    DK 2017 70315 A1 flow pattern. This results in a mixing of the flow of material between the dry matter fraction and the liquid fraction in the vessel, the large flow rate through the pipe and the propeller blades interaction with the mixture ensuring a homogenization of the mixture between liquid fraction and dry matter fraction.
    Usually the setting of the position between the propeller stirrer and the pipe piece is made prior to the installation of the plant, so that the plant then works with a fixed adjustment of the propeller stirrer with respect to the pipe piece, the setting being based on the current biomass mixture.
    It is possible, as stated in claim 2, that the liquid stream is supplied to the material stream under pressure and injected into the material stream prior to the total flow of the material stream and the liquid stream into the mixing vessel. The injection of the liquid stream into the solids fraction hereby breaks this up, avoiding a clumping of solids which are difficult to dissolve, not least because they may tend to flow on top of the free liquid surface in the vessel. The free surface of the vessel is referred to herein as a "liquid surface" but in reality it is a surface of more or less homogenized slurry of the dry matter in the liquid.
    As stated in claim 3, it is preferred that foreign bodies such as sand, gravel, stones and metal objects in the material stream be sedimented in an area between the sludge and the propeller stirrer and be withdrawn from the mixing vessel via a sluice at the bottom of the mixing vessel. Such a lock is easy to empty as will be explained below.
    By the action of the stirrer, the mixture is subjected to a strong acceleration due to the change of flow direction and thus produces a cyclone effect. By cyclone effect, it is meant that the fluid flow moves in a trajectory
    DK 2017 70315 A1 at a given velocity, but as the fluid flow changes direction, particles with a higher density than the general biomass will move out into a larger orbit and thus hit the side and bottom of the vessel where the particles will move towards the area. where the fluid flow again moves up towards the propeller, in other words, gather at the bottom of the vessel where the sluice is located. This means that sedimentation is amplified via the propeller stirrer in the vessel.
    The sedimentation effect can also be achieved with propeller stirrer and pipe piece fixed in relation to each other.
    Since the finely divided material can be derived from agriculture and the fields here, sand, gravel, rock and other impurities therein can usually be found therein, and these are not desired to be fed with the flow of the finished material and the establishment of a sedimentation pit at the end of the sloping slides ensure that sand, rocks and other heavy impurities such as metal particles sink down through the mixture and deposit here. It should be noted that organic material from, for example, agriculture typically includes mediums such as deep bedding and root vegetables, and that foreign bodies other than sand, stones and gravel are occasionally encountered as expected, such as larger items of iron or steel. These may be, for example, parts of housing inventory or parts lost from agricultural machinery used either in the field or in barn plants for the removal of deep litter. Such foreign bodies can be extremely costly to get into the inner parts of a natural gas production plant where it will be able to clog pipelines and cause damage and increased wear or direct failure of pumps.
    As stated in claim 4, the propeller agitator generates a flow in the mixture through the pipe piece in the direction from a suction side closest to an outlet of the tub towards a pressure side of the pipe piece in the direction of the inlet,
    DK 2017 70315 A1 heavy solid items also take place under the pipe along a slit from the area in front and above the outlet and sloping downwards towards the sluice.
    This additional sludge ensures that gravel and stones can slide down towards the sluice instead of accumulating on the bottom of the mixing vessel. The lock is equipped with an upright wall, so that no flow is possible across the sluice between the slip from the inlet and the slip from the area near the outlet. The two slides form a v-shaped course of the bottom of the vessel down towards the sluice and help prevent foreign bodies from coming out of the outlet and from here enter the following process plant, which may be, for example, a biogas plant.
    The invention also comprises a mixing plant as claimed in claim 5, wherein a mixing vessel is arranged for establishing a homogeneous mixture between a liquid fraction and a dry matter fraction comprising finely divided organic matter of varying dry matter content.
    According to the invention, the mixing vessel comprises an inlet for supply of dry matter fraction and liquid fraction and an outlet for outflow of a homogeneous mixture of the two fractions, between which there is inserted a pipe piece and a coaxially disposed propeller stirrer where in the area below the pipe piece in the bottom of the vessel. is provided a collecting tomb and associated sluice for removing sedimented heavy solid objects, further comprising one or more slit-shaped surfaces sloping down towards the collecting tomb.
    This arrangement of the mixing vessel ensures, in part, a proper homogenisation of the mixture, so that the dry matter fraction is slurried and evenly distributed in the liquid fraction, while at the same time ensuring that impurities such as sand, stone, gravel and metal parts are sedimented in the collecting trench via the slurry-shaped surfaces so that the sluice can be removed from the mixing vessel without substantially interfering with its operation.
    DK 2017 70315 A1
    As stated in claim 6, the system comprises an inlet pipe piece in front of the inlet to which is connected a liquid supply pipe, which at the transition to the inlet pipe piece comprises a rubber nozzle. Hereby the liquid can be added under pressure into the dry matter fraction, so that there will already be a beginning incorporation of the liquid into the dry matter. The specified rubber nozzle ensures that any foreign matter in the added liquid does not clog the nozzle, which is especially necessary in connection with biogas plants, since the liquid here comes from a biogas reactor tank, so that it contains the bacterial cultures needed for gasification, but at the same time will inevitably contain a certain amount of foreign matter.
    As further stated in claim 7, it is convenient for a knife valve to be arranged in front of the rubber nozzle. This ensures complete control over the supply of the dry matter fraction, so that it can be shut off quickly and efficiently. At the same time, the valve can help to ensure that the injected liquid penetrates backwardly against the movement of the solids fraction towards the mixing vessel.
    It is also preferred, as set forth in claim 8, that the sluice comprises a pull-out drawer which is horizontally mounted in a bucket-mounted drawer opening corresponding to the outer dimensions of the drawer, the drawer at each end having a stop element which completely fills the drawer opening and blocks passage of material. through the drawer opening, and between the two stop elements, the sides of the collection trench include but no bottom or top, so that material collected in the collection trench upon removal of the drawer is pulled out of the mixing vessel and may fall below the drawer outside the mixing vessel. This construction of the sluice ensures that the sluice can work even if the mixing vessel is fully or partially filled. The two stop elements, on the one hand, ensure that when the drawer is pushed to the bottom of the tub, the drawer opening will be blocked for review, and when the drawer is pulled outward, this lockout remains active until the opposite blocking member is reached.
    DK 2017 70315 A1 The drawer opening edge towards the interior of the tub. Further extraction of the drawer will then take place with the opposite blocking element in the drawer opening and the middle section, which has no bottom or top but only two sides, is pulled out of the mixing vessel, where accumulated material can here fall directly and unobstructed out of the drawer and down for collection either directly to a conveyor belt or to a container. After extraction, the now emptied drawer can be reinserted for continued collection of foreign matter in the collection pit.
    As stated in claim 9, the sliding surfaces comprise a surface which slopes from the inlet to the propeller stirrer near the center of the tub and a further surface which slopes from an area near the outlet and forward under the propeller stirrer near the center of the tub. The two sliding surfaces thus form a v-shaped cross-section, where the collecting tomb is placed at the bottom of the vessel where the two legs of the v meet, the propeller stirrer being located in the region over the collecting tomb. This positioning of the propeller stirrer at the same time ensures a good mixing between liquid and dry matter and, on the other hand, areas along the siphons where the flow is no more intense than sedimentation of foreign bodies, such as sand and larger steel objects, are achieved. concrete, in relation to the organic solids can take place.
    As stated in claim 10, a stop wall is arranged between the two sides of the collection trench which prevents flow through the collection trench longitudinally thereof. This stop wall is arranged in connection with a wall element which extends into the tank across the axis of the propeller stirrer and which helps to hold the pipe piece in relation to the propeller stirrer, thereby ensuring that no strong flow occurs in the area around the pickup pit. when the propeller stirrer is active so that sedimented items are not circulated again in the vessel.
    The invention will now be explained in more detail with reference to the drawings, in which:
    DK 2017 70315 A1
    FIG. 1 shows a sectional view through the tub,
    FIG. 2 is a sectional view similar to FIG. 1, but with the lock for sand, stone gravel and metal parts in the emptying position,
    FIG. 3 is an enlarged 3D view showing the inlet portion of the mixing vessel 1 in an exploded view,
    FIG. 4 is a plan view of a horizontal section through the mixing vessel,
    FIG. 5 is a vertical sectional view through the tub, and
    FIG. 6 is an enlarged view of a sectional view. 1 with the drain lock.
    In FIG. 1, a section through the mixing vessel 1 is shown and here the propeller agitator 2 is located below the liquid surface 13 and displaced mounted in the axial direction with respect to an encircling pipe piece 3, at the end of a shaft 19. The propeller stirrer is connected to a gear motor 8 which is located outside the mixing vessel. 1. The gear motor drives the propeller agitator through the shaft 19 at a suitable speed. In one embodiment (not shown), the propeller stirrer can be displaced axially with respect to the pipe piece to establish a desired flow pattern in the vessel 1. By regulating the mutual position in the axis direction between the pipe piece 3 and the propeller stirrer 2, it is possible to provide either a laminar flow or a turbulent flow so that it is possible to achieve irreversible fluctuating liquid-dry matter ratios and also changing the nature of the dry matter to obtain the flow conditions in the vessel ensuring a desired mixing.
    As the vessel is predominantly used for one and the same type of mixing task, it is delivered as shown in FIG. 1, with a fixed adjustment of the axial displacement of the pipe piece 3 relative to the stirrer 2, which is given by the length of the shaft 19 and the fitting of the pipe piece in the vessel, so that the axial displacement of the stirrer relative to the pipe piece is suitable for the type of material. , which should be mixed in the current vessel.
    DK 2017 70315 A1
    Opposite the propeller stirrer 2 there is a chute 7 which extends downwardly below a liquid level 13 from an inlet 4. The liquid level 13 in the vessel may vary, and sometimes it is shown above the inlet 4. From the inlet 4, finely divided material passes from a divider, not shown, into the mixing vessel 1, together with an injected liquid fraction, and along the sludge 7 into the liquid and into the vessel 1, and opposed to the slide 7, the propeller stirrer 2 will now, through its rotation, create an agitation in the contents of the vessel, which ensures a optimum mixing between the finely divided material and the injected liquid fraction, while heavier foreign matter such as sand, stone, gravel and metal parts will sink to the bottom of the collecting trench 6 at the end of the sludge 7.
    The propeller stirrer 2 and the pipe piece 3 are axially centered relative to each other, the pipe piece being mounted in a flange extending perpendicular to the pipe piece 3. As shown in FIG. 1, the flange is part of a plate 26 and, as shown in FIG. 4, the plate 26 extends from a wall to an opposite wall in the mixing vessel across the course of the shaft 19. By displacing the pipe piece 3 and the propeller stirrer 2 in the axial direction relative to each other, it is possible to influence the flow pattern generated by the propeller stirrer during its rotation. . As can be seen, blades or blades of the propeller stirrer 2 pass inside the pipe piece 3, which consequently has a larger internal diameter than the diameter of the blades.
    With the rotation of the wings, a cyclone effect is created as the mixture is accelerated vigorously and forced to change direction. Hereby heavy solid foreign matter is sent to the sides and bottom of the vessel via a cyclone effect and settles down towards the collection pit 6.
    As seen in FIG. 1 and FIG. 4 there is at the end of the sludge 7 a collection trench 6, in which possible heavy and solid objects such as sand, gravel, stone and metal scraps can be sedimented, ie sink to the bottom in the mixture of liquid and finely divided material also called slurry.
    DK 2017 70315 A1 which will arise through the function of the propeller stirrer.
    The collecting tomb is emptied by the horizontal extraction of an emptying lock 11 as seen in FIG. 1,2 and 6. This can be done, for example, by activating an actuator 12 on each side which pulls out the drawer 20 drawer 20 of the emptying loop 11 horizontally under the inclined chute 7. Hereby the sedimented material can be removed without discharging the liquid in the vessel 1.
    As seen in FIG. 3, the inlet 4 comprises an inlet pipe piece 14 to which finely divided material is fed via a auger or similar transport mechanism. To the inlet pipe piece 14 is connected a liquid supply pipe 15 to which liquid can be fed into the flow of finely divided material which is advanced into the inlet pipe piece
    14. The liquid supply tube 15 is conveniently terminated with a self-closing rubber valve 9 so that liquid can be passed through and out of the finely divided material prior to its supply to the mixing vessel. The narrowing of the rubber valve gives a nozzle effect which has a positive effect on the mixture, and this arrangement also ensures that no constriction can occur in this fluid supply where any solid particles in the supplied liquid can settle and cause blockages. Prior to the inlet pipe piece 14, a knife valve 18 as seen in FIG. 3 so that the connection between the mixing vessel 1 and the prior-arrangement pipe unit can be blocked when, for example, no new material is added to the mixing vessel or there is a risk that inflowing liquid from the rubber valve 9 penetrates backwards into the finely divided material supply pipe.
    The plant is used in the preparation of organic gas for gasification to produce biogas. The organic material is initially fed to a divider (not shown) and is then fed in a suitable subdivided form to the mixing vessel, and along the way liquid is supplied via the liquid supply valve. For example, it may be a return fluid from one
    DK 2017 70315 A1 already established or finished gasification production batch, which will thus contain the microbes needed for the development of gasification. Accordingly, it is important for the process of subsequent gasification that a good mixing occurs between the finely divided organic material and the liquid supplied, so that the microbes are evenly distributed in the material and so that a uniform and correct ratio of dry matter to liquid is obtained. . Furthermore, it is of the utmost importance that a pumpable slurry is formed, from which the majority of foreign bodies in the form of sand, metal parts and gravel and stones are separated.
    As can be seen from the figures, the mixing vessel 1 has a cover 17 so that it has the character of a chamber. As can be seen, there may be inspection hatches in the cover. This is of particular importance for biogas production, where the closed container enables the collection of degassing from the products which will be found in the mixing vessel 1 during operation. This also ensures that the unpleasant odor to humans that may come from biogas products is not released into the environment but remains in the chamber. There may be exhaust from the tub as well as an overflow. In other contexts, for example, in the food industry, this is less important, and the plant will be able to be established here with an open vessel without extraction or overflow.
    The liquid level in the mixing vessel 1 is usually measured via a contactless sensor 16 based on light, sound or radar waves. In addition, one or more safety meters 10 for the liquid level in the tub have been established.
    Outlet 5 from the tub is located below and here the final mixture is taken for further transport up to the further processing and gasification chambers (not shown).
    The lock 11 comprises a pull-out drawer 20 mounted in a drawer opening 21 corresponding to the outer dimensions of the drawer 20. Thus, the pull-out drawer 20 has i
    Each end has a stop member 22 which completely fills the drawer opening 21 such that the stop member blocks passage of material through the drawer opening 21 when the drawer is in the opening 21.
    In FIG. 1, the pull-out drawer 20 is seen in its drawer opening 21, and a stop element 22 extremely holds the drawer opening 21 close to material in the mixing vessel, and a stop element 22 has the same outer dimensions as the stop element outermost. As shown in FIG. 2, the inner stop element 22 will block the passage from the mixing vessel through the drawer opening 21 when the pull-out drawer is pulled out for emptying material collected in the collecting trough 6. The discharge occurs by the material, as indicated by arrow 23, falling from the bottom of the drawer, as in the space between the two stop elements 22 has no bottom or top.
    The sliding surfaces comprise the slit 7 which slopes from the inlet 4 onwards to the propeller stirrer 2 near the center of the tub and an additional surface 24 which slopes from an area near the outlet 5 and forward under the propeller stirrer 2 near the center of the tub 1. The additional surface 24 ensures that no heavy solid objects are deposited between the collection trench 6 and the outlet 5.
    It is noted that "heavy" is used here for objects having a higher density than the mixture, and that "" massive "means that the objects have a size which, in proportion to their weight, makes them settable in the slurry in the tub, even when this is agitated by the propeller stirrer.
    In FIG. 1, it is seen that between the two sides of the collection trench is a stop wall 25 which prevents flow through the drawer 20, where it forms the collection trench 6. The stop wall 25 is located just below the transverse plate 26 holding the pipe piece 3. This creates the stop wall 25 and the transverse plate 26 provides an obstacle for flow across the entire width of the vessel in the area below the pipe piece 3, which contributes to creating good conditions for the sedimentation of heavy solid foreign matter, and at the same time
    DK 2017 70315 A1 creates more intense flow in the remaining part of the tub.
    Note that the stop wall 25 and the additional sliding surface 24 are not shown in the embodiment of FIG. 2. The plant is thus operable without these elements, but exhibits a significantly better ability to ensure mixing and avoidance of foreign matter in the resulting slurry when the stop wall 25 and the additional sliding surface 24 are part of the plant.
    It should be noted that around the drawer opening 10 interchangeable sealing lips 28 are provided, so as to ensure a reasonable seal against leaking fluid from the plant along the meeting between the drawer opening and stop elements.
    As shown in FIG. 1, a cover 27 is arranged around the area 15 where the drawer 20 is pulled out, which partly increases the safety around the plant and partly against gas or unacceptable odors escaping from the plant to the surroundings.
    An enlarged section of the pull-out drawer is in the closed position corresponding to the view in FIG. 1 is shown in FIG. 6. The stop elements 22 correspond closely to the drawer opening, and the interchangeable sealing lips 28 are also seen at the leading edge of the drawer opening.
    DK 2017 70315 A1
    Reference numbers:
    mixing
    propellor
    Rail section
    inlet
    Expired
    collection grave
    chute
    Gear motor
    Rubber barrow
    Liquid level meter
    Drain Sluice
    Empty lock actuator
    liquid level
    Indløbsrørstykke
    liquid feed pipe
    Touchless sensor
    Covering
    Knife valve
    Shaft
    Drawer
    Drawer Opening
    stop element
    Arrow
    Additional slip surface
    stop wall
    Transverse plate
    shielding
    sealing lips
    DK 2017 70315 A1
    权利要求:
    Claims (10)
    [1]
    patent claims
    A process for mixing material streams of varying solids content comprising finely divided organic material with a liquid stream in a mixing vessel (1) maintaining a predetermined degree of filling via a free liquid surface (13) characterized in that the material stream and liquid stream are supplied from an inlet (4) and down a slant (7) relative to the horizontal slope (7) below the free liquid surface (13), where a propeller stirrer (2) feeds the mixture in relation to its axis of rotation through a pipe piece (3) coaxially disposed in relation to the axis of rotation. the slat (7), to form a predetermined flow pattern in the mixing vessel (1).
    [2]
    Process according to claim 1, characterized in that the liquid stream is supplied to the material stream under pressure and injected into the material stream prior to the total flow of the material stream and the liquid stream into the mixing vessel (1).
    [3]
    Process according to claim 1, characterized in that impurities such as sand, gravel, stones and metal objects in the material stream are sedimented in an area between the sludge and the propeller stirrer and taken out from the mixing vessel via a sluice (11) at the bottom of the mixing vessel (1).
    [4]
    Method according to claim 3, characterized in that the propeller stirrer (2) produces a flow in the mixture through the pipe piece (3) in the direction from a suction side nearest an outlet (5) towards a pressure side in the direction of the inlet (4), blanks also pass beneath the pipe piece (3) along a further slit (24) from the area in front of and above the outlet (5) and sloping downwards towards the lock (11).
    DK 2017 70315 A1
    [5]
    A mixing plant comprising a mixing vessel (1) for establishing a homogeneous mixture between a liquid fraction and a dry matter fraction comprising finely divided organic matter of varying dry matter content, characterized in that the mixing vessel (1) comprises an inlet (4) for supply of dry matter fraction and a liquid fraction and an outlet (5) for extracting a homogeneous mixture of the two fractions, between which there is inserted a pipe piece (3) and a propeller stirrer (2) disposed in relation thereto, where in the area below the pipe piece (3) a bottom of the vessel is placed. collecting tombs (6) and associated sluices (11) for removing sedimented heavy solid objects, further comprising one or more slit-shaped surfaces (7.24) which slopes down towards the collection tomb (6).
    [6]
    Mixing system according to claim 5, characterized in that the system comprises an inlet pipe piece (14) in front of the inlet (4), to which is connected a liquid supply pipe (15) which at the transition to the inlet pipe piece (14) comprises a rubber nozzle (9).
    [7]
    Mixing system according to claim 6, characterized in that a knife valve (18) is arranged in front of the rubber nozzle (9).
    [8]
    Mixing system according to claim 5, characterized in that the lock (11) comprises a pull-out drawer (20) which is horizontally mounted in a drawer opening (21) mounted in the drawer (1) corresponding to the outer dimensions of the drawer, wherein the drawer (20) each end has a stop element (22) which completely fills the drawer opening (21) and blocks the passage of material through the drawer opening (21), and the pull-out drawer (20) between the two stop elements (22) comprises the sides of the pickup pit (6) but no bottom or top, so that material collected in the pickup pit (6) at the pullout of the drawer (20) is pulled out of the mixing vessel (1), and may fall below the drawer (20) outside the mixing vessel (1).
    DK 2017 70315 A1
    [9]
    Mixing system according to claim 5, characterized in that the sliding surfaces (7,24) comprise a surface (7) which slopes from the inlet (4) towards the propeller stirrer (2) near the center of the vessel and an additional surface
    5 (24) which slopes from an area near the outlet (5) and forward under the propeller stirrer (2) near the center of the vessel.
    [10]
    Mixing system according to claim 9, characterized in that a stop wall (25) is arranged between the two sides of the collection trench (6), which
    10 prevent flow through the collection trench (6).
    DK 2017 70315 A1
    1/3
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    同族专利:
    公开号 | 公开日
    DK179421B1|2018-06-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19526375A1|1995-07-19|1997-01-23|Werkstoff & Funktion Grimmel W|Waste water treatment comprises sand trap|
    WO1998014258A1|1996-10-02|1998-04-09|Microsep International Corporation|Water and wastewater treatment system with internal recirculation|
    US6197190B1|1999-04-07|2001-03-06|Patrick Hanlon|Tapered flocculation water treatment|
    EP1362635A1|2002-05-15|2003-11-19|U.T.S. Umwelt-Technik-Süd GmbH|Stirring device for a fermenter of a biogas plant|
    US20140209523A1|2006-12-29|2014-07-31|Veolia Water Solutions & Technologies Support|Water Treatment Process and Plant Using Ballasted Flocculation and Settling|
    法律状态:
    2019-12-14| PBP| Patent lapsed|Effective date: 20190508 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201670892|2016-11-11|
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