WO2012127676A1 - Déshydrateur de filtre presse - Google Patents

Déshydrateur de filtre presse Download PDF

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Publication number
WO2012127676A1
WO2012127676A1 PCT/JP2011/057123 JP2011057123W WO2012127676A1 WO 2012127676 A1 WO2012127676 A1 WO 2012127676A1 JP 2011057123 W JP2011057123 W JP 2011057123W WO 2012127676 A1 WO2012127676 A1 WO 2012127676A1
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WO
WIPO (PCT)
Prior art keywords
filter
diaphragm
filter cloth
filter plate
cloth
Prior art date
Application number
PCT/JP2011/057123
Other languages
English (en)
Japanese (ja)
Inventor
水谷　太
裕康 杉村
博 辻野
Original Assignee
株式会社クボタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社クボタ filed Critical 株式会社クボタ
Priority to PCT/JP2011/057123 priority Critical patent/WO2012127676A1/fr
Priority to CN201180069551.8A priority patent/CN103458984B/zh
Publication of WO2012127676A1 publication Critical patent/WO2012127676A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
    • B01D25/282—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying
    • B01D25/285—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying by compression using inflatable membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/127—Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/21—Plate and frame presses
    • B01D25/215—Construction of the filter plates, frames

Definitions

  • the present invention relates to a filter press dehydrator in which a filter plate and a diaphragm are arranged to face each other via a pair of filter cloths, and a raw solution is supplied to the filter chamber formed between the pair of filter cloths to be squeezed.
  • Patent Document 1 a plurality of filter chambers 85 in which a pair of filter cloths 83 and 84 are arranged between the filter plates 81 and 82 are arranged in parallel, and the stock solution is press-fitted into each filter chamber 85. Later, a filter press dehydrator that expands the diaphragm 86 and squeezes the undiluted solution to separate the solid and liquid with the filter cloths 83 and 84, and then separates the filter plates 81 and 82 from each other to drop and discharge the dehydrated cake 87 is proposed. Has been.
  • the dehydrated cake adheres to both the filter cloth on the filter plate side and the diaphragm side after the solid-liquid separation, and after the filter plate is separated, the dehydrated cake is removed from the filter cloth. If the residue of the dehydrated cake does not easily peel off and remains on the surface of the filter cloth, the filter cloth is clogged at an early stage and the filter cloth needs to be replaced frequently.
  • a scraper is provided facing the surface of the filter cloth, and the dewatered cake attached to the filter cloth surface is peeled and dropped by moving the filter cloth.
  • the dewatered cake adheres to either the filter plate side or the diaphragm side. Therefore, if neither the filter cloth on the filter plate side nor the diaphragm side is provided with a scraper, the dehydrated cake attached to the filter cloth surface cannot be peeled off. Further, in order to surely peel and drop the dehydrated cake, it is necessary to bring the scraper into contact with the surface of the filter cloth, which may damage and damage the filter cloth surface.
  • the present invention provides a filter press dehydrator in which a dewatered cake can be attached only to either the filter cloth on the filter plate side or the diaphragm side, and the dewatered cake can be easily detached from the filter cloth. Objective.
  • the filter press dehydrator according to the present invention is characterized in that a filter plate and a diaphragm are arranged to face each other via a pair of filter cloths as described in claim 1 of the claims.
  • the dewatered cake tends to adhere to the filter cloth on the side where the drainage groove is formed so that the gap amount is increased, and the adhesion of the dehydrated cake to the other filter cloth is suppressed. be able to. Further, since such a dehydrated cake has a low water content at the contact portion with the filter cloth, the dehydrated cake can be easily detached without remaining on the filter cloth with a slight impact.
  • the second characteristic configuration includes, in addition to the first characteristic configuration described above, an upper support portion in which the pair of filter cloths are provided above the filter chamber, and a lower portion. It is stretched in the vertical direction by the lower support part provided, each filter cloth is configured to be movable in the vertical direction in a state where the filter plate and the diaphragm are separated from each other, and a drainage groove formed between the filter plate and the diaphragm. The filter cloth on the side having a larger amount of voids moves downward and the other filter cloth moves upward.
  • the third feature configuration is that, as described in claim 3, in addition to the second feature configuration described above, the filter cloth is configured to start moving at a predetermined acceleration from a stopped state.
  • the predetermined acceleration means that the inertial force acting on the dewatered cake by the acceleration at the start of the movement of the filter cloth exceeds the force adhering to the filter cloth surface of the dehydrated cake, so that the contact surface between the dewatered cake and the filter cloth This is the acceleration above the minimum acceleration at which slipping and peeling can occur.
  • the amount of voids in the drainage grooves formed in the diaphragm is reduced in the filter plate. It exists in the point set so that it may become more than the space
  • the manufacturing cost can be reduced by making the gap amount of the drainage groove formed in the diaphragm larger than the gap amount of the drainage groove formed in the filter plate.
  • a corrugated drainage groove is provided in the vertical direction on the surface of the filter plate. It is in the point formed in parallel with a plurality.
  • the filter cloth is not easily caught in the drainage groove. Can prevent the breakage of the filter cloth.
  • processing into a corrugated drainage groove can reduce the processing cost because the processing steps can be simplified compared to processing into a radial, mesh, or other complex shape.
  • the dewatering cake can be attached only to the filter cloth on either the filter plate side or the diaphragm side, and the dewatering cake can be easily detached from the filter cloth.
  • a dehydrator can be provided.
  • FIG. 1 is a schematic view of a filter press dehydrator according to the present invention.
  • 2A is an explanatory diagram of the diaphragm, which is a cross-sectional view taken along line AA of the front view, and FIG. 2B is a front view.
  • FIG. 3A is a detailed view of the edge portion of the diaphragm, and FIG. 3B is an explanatory view of the thickness of the diaphragm and the thickness at the rising portion.
  • 4A is a front view of the filter plate, and FIG. 4B is a side view of the filter plate.
  • FIG. 5A is a plan view of the filter plate, and FIG. 5B is a back view of the filter plate.
  • FIG. 6A is a side sectional view showing a state where the diaphragm is fitted into the filter plate
  • FIG. 6B is a plan view
  • FIG. 6C is a back view
  • FIG. 7A is a front view of the stock solution supply member
  • FIG. 7B is a side view of the stock solution supply member
  • FIG. 8A is a schematic diagram illustrating a state in which the filtration unit is opened
  • FIG. 8B is a schematic diagram illustrating a state in which the filtration unit is closed.
  • 9A is an explanatory diagram of the closing plate process
  • FIG. 9B is an explanatory diagram of the filtration process
  • FIG. 9C is an explanatory diagram of the pressing process
  • FIG. 9D is an opening plate / dehydrated cake discharging process.
  • FIG. 10A is a front view of a diaphragm according to another embodiment
  • FIG. 10B is a front view of a diaphragm according to another embodiment
  • FIG. 11 is a front view of a filter plate according to another embodiment
  • FIG. 12 is an explanatory view of a conventional filter press dehydrator.
  • FIG. 13 is a cross-sectional view of a main part of a conventional filter press dehydrator.
  • the filter press dehydrator 100 has a pair of guide rails 3 horizontally mounted between a left frame 1 and a right frame 2, and a large number of filtration units 4 are placed on the left frame 1 on the pair of guide rails 3. And the right frame 2 are slidably mounted.
  • the right frame 2 is provided with a pressing cylinder 6, and a pressing member 5 is provided at the tip of the rod 6 a of the pressing cylinder 6.
  • the plurality of filtration units 4 are connected to adjacent filtration units 4 by link members (not shown), the rightmost filtration unit 4 in FIG. 1 is connected to a filtration unit driving device, and the leftmost filtration unit 4 is a left frame 1. It is connected with the side.
  • the filtration unit 4 sequentially moves in the right direction, and the filtration units 4 are separated by a link member at a predetermined interval.
  • the movement of the filtration unit 4 is not limited to the above-described mode, and the filtration unit 4 is suspended on a chain (not shown) disposed between sprockets (not shown) provided in the left frame 1 and the right frame 2.
  • the configuration may be such that the filtration unit 4 suspended on the chain is moved by driving the sprocket and moving the chain.
  • an endless filter cloth 9 stretched between an upper roller 7 as a plurality of upper support portions and a lower roller 8 as a lower support portion is disposed in the vertical direction.
  • the left frame 1 is provided with a stock solution supply port 15 for supplying a stock solution that is an object to be squeezed into the filter chamber 14 and a filtrate discharge port 16 for discharging the filtrate compressed in the filter chamber 14.
  • the filtrate is discharged from the filtrate discharge port 16.
  • the filtration unit 4 is opened by the filtration unit driving device, the dehydrated cake dehydrated from between the plurality of filtration units 4 is discharged.
  • the filtration unit 4 is composed of a pair of diaphragms 20 and a filter plate 30.
  • a thick part 21 that functions as a filter frame is integrally formed around a thin part 22 that squeezes the stock solution.
  • the thick portion 21 of the diaphragm 20 functions as a sealing surface of the filter chamber 14 by being compressed by two adjacent filter plates. Therefore, there is no need to use a separate seal member, and the number of parts can be reduced.
  • a plurality of rectangular filtrate drain grooves 25 having the same center as the center of the diaphragm 20 are formed on the flat surface 22a and the inclined surface 22b of the thin portion 22.
  • the cross-sectional shape of the drainage groove 25 may be appropriately formed in a rectangular shape, a V shape, an arc shape, or the like in consideration of the expansion of the thin portion 22 of the diaphragm 20 in the pressing process of the dehydrated cake.
  • the flat surface 22a The shape may be different between the inclined surface 22b.
  • the pitch between the adjacent drain grooves 25 may be varied.
  • the drainage groove 25 is formed by appropriately setting the shape, width, depth, total length, number, etc. of the groove.
  • the void amount of the drainage groove 25 formed in the diaphragm 20 is formed to be larger than the void amount of the drainage groove formed in the filter plate.
  • the void amount of the drainage groove means the amount of the drainage groove dug, that is, the amount obtained by integrating the voids formed for draining the filtrate, and the drainage groove shape, width, depth described above. The total length, number, etc. can be set.
  • the edge of the thin portion 22 is connected to a position separated by a distance d from one end in the thickness direction of the inner periphery of the thick portion 21, and the central portion of the thin portion 22 is thick. It is formed on a flat surface 22a (see FIG. 2) projecting to the other end in the thickness direction of the portion 21, and the flat surface 22a and the edge portion are connected by an inclined surface 22b.
  • a filtrate discharge passage 26 penetrating in the front-rear direction is formed in the left and right lower portions of the diaphragm 20 so that the filtrate flowing from the drainage groove 25 can be passed through.
  • the diaphragm 20 is not particularly limited in material, but the thick portion 21 is subjected to a large pressure that functions as a sealing surface, and the thin portion 22 is moved to squeeze the stock solution. Those having flexibility are preferred.
  • the diaphragm 20 can integrally form the thick portion 21 and the thin portion 22 by injection molding a polymer compound such as a thermoplastic elastomer.
  • a polymer compound such as a thermoplastic elastomer.
  • the thick portion 21 and the thin portion 22 the number of components necessary for forming a filter chamber such as a diaphragm installation frame can be reduced.
  • the thick portion 21 is sandwiched by a pressure that can withstand the supply pressure of the stock solution supplied into the filter chamber and functions as a seal surface.
  • the diaphragm 20 needs to maintain the function as a movable part that squeezes the stock solution while maintaining the function as a sealing surface, and therefore the hardness when using the elastomer resin is preferably in the range of about JIS A hardness 65 to 90. .
  • the thick portion 21 may have a solid structure, or as shown in FIG. 2, a plurality of recesses 24 are formed so as to be alternately front and back, so that the thickness of each portion of the diaphragm 20 is different. By reducing the above, it may be formed so as to prevent a bias in shrinkage during cooling of injection molding.
  • one side surface of the filter plate 30 is provided with a compression unit 31 that compresses the stock solution with the adjacent diaphragm 20, and the filtrate compressed in the filter chamber 14 is compressed in the compression unit 31.
  • a plurality of sinusoidal drainage grooves 32a are formed in parallel in the longitudinal direction of water flow, and each drainage groove 32a is connected by a lower connection groove 32b.
  • the connecting groove 32 b is formed to be inclined downward from the center of the filter plate 30 to the left and right sides, and is configured to communicate with a filtrate discharge passage 33 formed at the lower left and right of the filter plate 30.
  • the cross-sectional shape of the drainage groove 32a may be formed in a rectangular shape, a V shape, an arc shape, or the like, and the pitch with the adjacent drainage groove 32a may be varied.
  • the drainage groove 32a is formed so as to reduce the amount of voids by appropriately setting the shape, width, depth, total length, number, etc. of the groove, compared to the drainage groove 25 formed in the diaphragm 20. Has been.
  • the drainage groove 25 of the filtrate formed in the diaphragm 20 has a larger amount of voids than the drainage groove 32a of the filtrate formed in the filter plate 30, when the dewatered cake is squeezed in the filter chamber 14, the drainage groove 25 In this case, the amount of filtrate flowing is greater than in the drainage groove 32a. Therefore, the dehydrated cake has a lower moisture content on the diaphragm 20 side than on the filter plate 30 side, increases the contact area, and adheres to the filter cloth 9 on the diaphragm 20 side.
  • a filtrate discharge passage 34 is formed below the filtrate discharge passage 33 so as to communicate with the filtrate discharge passage 26 in a state where the diaphragm 20 is fitted in the filter plate 30.
  • a stock solution supply passage 35 penetrating in the front-rear direction is provided at the upper left and right sides of the filter plate 30, and a recess 36 into which the stock solution supply member 40 can be loosely inserted is formed at the periphery of the stock solution supply passage 35. 36a is provided.
  • a pair of slide pieces 45 for mounting on the pair of guide rails 3 are attached to the left and right sides of the filter plate 30.
  • a rising portion 37 and a mounting surface 38 into which the diaphragm 20 can be fitted are formed on the other side of the back surface of the compression portion 31 of the filter plate 30.
  • the thickness of the rising portion 37 is set to be smaller than the thickness of the diaphragm 20.
  • the thickness of the thick portion 21 of the diaphragm 20 is larger than the thickness of the rising portion 37, so that the difference in thickness is a compression allowance between adjacent filter plates. It becomes.
  • the pressing force applied by the pressing cylinder 6 is large enough to prevent the stock solution in the filter chamber 14 from leaking out.
  • the pressing force by the pressing cylinder 6 is stronger than a predetermined pressure required for sealing the diaphragm 20.
  • the rising portion 37 supports pressure with the adjacent filter plate 30, so that the thick portion 21 of the diaphragm 20 Since a pressure higher than a predetermined pressure is not applied, it is possible to avoid the possibility of deformation or breakage due to excessive tightening of the thick portion 21, so that the sealing effect of the sealing surface can be stabilized.
  • the left and right rising portions 37 are compressed at a predetermined pressure. It is configured to be.
  • the diaphragm 20 is fixed to the mounting surface 38 with bolts or the like as appropriate.
  • a pressurized water inlet 39 a and a pressurized water inlet path 39 b for supplying pressurized water for inflating the diaphragm 20 toward the compression portion 31 side of the adjacent filter plate are formed.
  • the pressurized water is introduced from the pressurized water supply pipe 46 attached to the lower portion of the filter plate 30. It is supplied between the attachment surface 38 and the back surface 23 of the thin portion of the diaphragm 20 through the passage 39b and the pressurized water inlet 39a, and the thin portion 22 of the diaphragm 20 expands toward the compression portion 31 side of the adjacent filter plate 30. It will be.
  • the filter plate 30 is made by extruding a synthetic resin material such as polypropylene, for example, the conventional metal filter plate is used in terms of strength while taking advantage of the lightness and chemical resistance that are the characteristics of the compatible resin. Is not inferior to The filter plate 30 becomes lighter, the weight of the plurality of filtration units 4 arranged in parallel is reduced, and the filter press dehydrator 100 can be enlarged.
  • the stock solution supply member 40 includes a stock solution supply pipe 41 that can be inserted into the stock solution supply path 35 and a stock solution supply section 42 that is loosely inserted into the recess 34 of the filter plate 30.
  • the stock solution supply section 42 is formed with a stock solution supply path 43 that branches perpendicularly from the stock solution supply pipe 41 and supplies the stock solution supplied from the stock solution supply pipe 41 into the filter chamber 14.
  • the stock solution supply member 40 is positioned so that the stock solution supply member 40 is positioned at a predetermined position with the filter plate 30 into which the stock solution supply member 40 is loosely inserted and the adjacent filter plate being opened.
  • Link members 44a and 44b are attached by bolts 44c.
  • the stock solution supply part 42 of the stock solution supply member 40 is supported by the filter plate 30a.
  • the stock solution is placed in the filter chamber 14 formed between the thin wall portion 22 of the diaphragm 20a and the compression portion 31 of the filter plate 30b. Will be supplied.
  • the stock solution supply member 40 is loosely inserted into the recess 34 of the filter plate 30 when the adjacent filtration units 4 a and 4 b are pressed to form the filter chamber 14 between the pair of filter cloths 9.
  • the stock solution supply pipe 41 is accommodated in the stock solution supply path 35 and is configured to be connected to the stock solution supply path 35 of the adjacent filtration unit 4.
  • the stock solution is supplied from the stock solution supply port 15 to the stock solution supply path 35, the stock solution is supplied to each filter chamber 14 via the stock solution supply member 40.
  • the filter cloth 9 is formed in an endless shape, and is a pair of filters that are folded back by an upper roller 7 provided above the filter chamber 14 and a lower roller 8 provided below and stretched in the vertical direction.
  • the fabrics 9a and 9b are sandwiched between adjacent filter plates 30.
  • a guide roller 18 for guiding the filter cloth 9 so as not to contact the filter plate 30 and the diaphragm 20 is provided in the vicinity of each upper roller 7, and the filter cloth 9 is provided with a filter cloth tension provided in the upper frame 17.
  • the apparatus 10 is configured so as not to bend by being tensioned.
  • the arrangement of the rollers is not limited to the above-described one, and can be set as appropriate.
  • the upper frame 17 is provided with a filter cloth meandering prevention device 11 for preventing the filter cloth 9 from meandering and a filter cloth driving device 12 for driving the filter cloth 9.
  • the filter cloth driving device 12 is configured such that the filter cloth 9a on the diaphragm 20 side moves downward when the filter cloth 9 is driven with the filter plate 30 and the diaphragm 20 constituting the filter chamber 14 open. Therefore, even if the diaphragm 20 and the filter plate 30 constituting the filter chamber 14 are opened in the opening plate / dehydrated cake discharging step, even if the dehydrated cake 19 is not fixed and dropped on the filter cloth 9a on the diaphragm 20 side, the filter cloth 9a. Is moved downward, the dewatered cake attached to the surface of the filter cloth 9a can be peeled and dropped.
  • the filter cloth driving device 12 is configured to start moving the filter cloth 9 at a predetermined acceleration from a stopped state.
  • the predetermined acceleration means that the inertial force acting on the dewatered cake by the acceleration at the start of the movement of the filter cloth exceeds the force adhering to the filter cloth surface of the dehydrated cake, so that the contact surface between the dewatered cake and the filter cloth This is the acceleration above the minimum acceleration at which slipping and peeling can occur.
  • the filter cloth 9 is accelerated rapidly and starts moving, the dehydrated cake attached to the surface of the filter cloth 9 is peeled and dropped.
  • the dewatered cake 19 is reliably peeled off when the filter cloth 9a is folded back by the lower roller 8, and can be removed by dropping.
  • the cleaning device 13 provided in the upper frame 17 sprays the cleaning liquid supplied from the outside even when the residue of the dewatered cake remains on the surface of the filter cloth 9 or when the filter cloth 9 is clogged. And can be cleaned. In this way, since the entire surface can be cleaned by circulating the filter cloth 9, it is not necessary for the operator to clean the filter cloth 9 for each filtration unit.
  • the filter cloth 9 is circulated by the filter cloth driving device 12, whereby the entire surface can be used efficiently.
  • the filter cloth 9 may not be configured to be circulated by the filter cloth driving device 14 using a single endless filter cloth 9.
  • a configuration in which a pair of filter cloths are stretched between the plurality of filtration units 4 and the pair of filter cloths between the filtration units 4 respectively move downward is also possible.
  • the filter press dehydrator 100 configured as described above is operated in the order of a closing plate process, a filtration process, a pressing process, and an open plate / dehydrated cake discharging process.
  • the pressing member 5 is advanced through the rod 6 a of the pressing cylinder 6 to press the plurality of filter plate units 4, and a plurality of portions are interposed between the thin portion 22 of the diaphragm 20 and the compression portion 31 of the filter plate 30. This is a step of forming a filter chamber.
  • the pressure cylinder 6 is operated with the filter cloth 9 disposed between the adjacent filtration units 4 to advance the pressure member 5 through the rod 6a, and the filtration unit 4 is moved to the left.
  • a plurality of filter chambers 14 are formed between the filter cloths 9 by pressing in the frame 1 direction.
  • the filtration process is a process in which the stock solution is pressed into the pair of filter cloths 9 of the filter chamber 14 formed by the closed plate process and filtered.
  • the stock solution is press-fitted into the filter chamber 14 formed by the closing plate process from the stock solution supply port 15 on the left frame 1 side, and is filtered with a filter cloth 9.
  • the filtrate flowing from the drainage grooves 25 and the drainage grooves 32 a is drained from the filtrate discharge port 16 to the outside of the filter press dehydrator 100.
  • the squeezing step is a step of compressing and dehydrating the residue containing moisture remaining between the filter cloths 9 in the filtration step to form a dehydrated cake.
  • pressurized water is supplied from the pressurized water supply pipe 46 to the back surface 23 of the thin wall portion of the diaphragm 20 through the pressurized water introduction path 39b and the pressurized water introduction port 39a, and the diaphragm 20 is connected to the adjacent filter plate 30.
  • the dewatered cake 19 swelled to the compression unit 31 side and remains between the filter cloths 9 is pressed to the compression unit 31 side of the other filter plate 30 to perform compression dehydration.
  • the dehydrated cake 19 is no longer compressed, and the diaphragm 20 cannot expand, so that the pressurized water does not flow.
  • the plate opening and dewatering cake discharging step is a step of stopping the supply of pressurized water and contracting the diaphragm 20, then retracting the rod 6 a of the pressing cylinder 6, opening each filtration unit 4, and discharging the dewatering cake 19. .
  • the filter cloth 9 is folded back by the lower roller 8 at the lower end of the diaphragm 20, and the dewatered cake 19 attached to the surface of the filter cloth is completely peeled and dropped and removed.
  • the configuration in which the drainage groove 25 is formed on the flat surface 22a and the inclined surface 22b of the thin portion 22 of the diaphragm 20 has been described, but the shape of the drainage groove is not limited thereto.
  • the drainage groove 50 may be formed only on the flat surface 22a of the thin portion 22. Furthermore, instead of the plurality of recesses 24 formed in the thick part 21, a plurality of endless recesses 51 may be alternately formed on the front and back sides.
  • the shape of the drainage groove is a combination of a linear drainage groove 52 extending radially from the center of the diaphragm 20 and a concentric drainage groove 53 with respect to the radial direction of the diaphragm 20. It may be a shape. In any case, the drainage groove is symmetrical with respect to the center of the diaphragm 20 and is concentric with the radial direction of the diaphragm 20 so that the void amount is larger than that of the filtrate drainage groove formed on the filter plate. It only has to be configured.
  • a configuration in which a plurality of triangular drainage grooves 54 are formed in parallel in the vertical direction may be used, or a sawtooth wave type or a rectangular wave type may be used.
  • the filter cloth has a shape that does not easily get caught in the drainage groove, and the gap amount is smaller than that of the drainage groove formed in the diaphragm.
  • the drainage groove in which the diaphragm is formed has a larger amount of voids than the drainage groove formed in the filter plate.
  • the diaphragm is obtained by injection molding a polymer compound such as a thermoplastic elastomer, so the drain plate can be made once regardless of the shape of the drainage groove, whereas the filter plate is made of polypropylene. Since a drainage groove may be cut into a product obtained by extrusion molding such a synthetic resin material, if there are many cutting amounts and cutting steps, the processing cost will increase.
  • the drainage groove of the filter plate is configured such that the gap amount is smaller than the drainage groove of the diaphragm.
  • the drainage groove formed in the diaphragm may be configured so that the gap amount of the drainage groove formed in the filter plate is reduced, and the filter cloth on the filter plate side may be moved downward.
  • the configuration is not limited to the case where all the diaphragms or one of the filter plates has a large amount of gaps.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un déshydrateur de filtre presse qui permet à un gâteau déshydraté d'être attaché à seulement un tissu filtrant soit sur un côté de la plaque de filtre soit un côté du diaphragme, et qui permet au gâteau déshydraté d'être facilement séparé du tissu filtrant. Le déshydrateur de filtre presse est configuré de telle manière que la taille d'ouverture d'un canal de drainage (25) formé sur un diaphragme (20) est plus grande que la taille d'ouverture d'un canal de drainage (32a) formé sur une plaque de filtre (30). Le déshydrateur de filtre presse est en outre configuré de telle manière que, avec les plaques de filtre (20) et les diaphragmes (20) séparés, parmi les tissus filtrants (9a, 9b) qui sont capables de se déplacer vers le haut ou vers le bas, le tissu filtrant (9a) sur le côté du diaphragme (20) se déplace vers le bas et l'autre tissu filtrant (9b) se déplace vers le haut. Par conséquent, un gâteau (19) s'attache facilement au tissu filtrant (9a) sur le côté du diaphragme (20), et l'attachement du gâteau (19) à l'autre tissu filtrant (9b) peut facilement être supprimé, et quand on amène le tissu filtrant (9a) sur le côté duquel le gâteau (19) est attaché à se déplacer dans une direction vers le bas, le tissu filtrant (9a) se plie en arrière en raison des cylindres du fond (8), permettant au gâteau (19) d'être facilement séparé et de tomber.
PCT/JP2011/057123 2011-03-24 2011-03-24 Déshydrateur de filtre presse WO2012127676A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2011/057123 WO2012127676A1 (fr) 2011-03-24 2011-03-24 Déshydrateur de filtre presse
CN201180069551.8A CN103458984B (zh) 2011-03-24 2011-03-24 压滤脱水机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/057123 WO2012127676A1 (fr) 2011-03-24 2011-03-24 Déshydrateur de filtre presse

Publications (1)

Publication Number Publication Date
WO2012127676A1 true WO2012127676A1 (fr) 2012-09-27

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PCT/JP2011/057123 WO2012127676A1 (fr) 2011-03-24 2011-03-24 Déshydrateur de filtre presse

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CN (1) CN103458984B (fr)
WO (1) WO2012127676A1 (fr)

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CN110217964A (zh) * 2019-06-03 2019-09-10 广东恒鑫智能装备股份有限公司 一种污泥脱水挤压模
CN110104927B (zh) * 2019-06-19 2023-12-19 毅康科技有限公司 一种河道污泥多级回收处理装置
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