WO2020189770A1 - Dispositif d'enrobage et procédé d'enrobage de filtre de traitement d'eau - Google Patents

Dispositif d'enrobage et procédé d'enrobage de filtre de traitement d'eau Download PDF

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Publication number
WO2020189770A1
WO2020189770A1 PCT/JP2020/012409 JP2020012409W WO2020189770A1 WO 2020189770 A1 WO2020189770 A1 WO 2020189770A1 JP 2020012409 W JP2020012409 W JP 2020012409W WO 2020189770 A1 WO2020189770 A1 WO 2020189770A1
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WIPO (PCT)
Prior art keywords
housing
slurry
filter member
coating
side wall
Prior art date
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PCT/JP2020/012409
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English (en)
Japanese (ja)
Inventor
未映子 菓子
佐伯　智則
山口　欣秀
琢也 神林
Original Assignee
日立金属株式会社
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Application filed by 日立金属株式会社 filed Critical 日立金属株式会社
Priority to JP2021507424A priority Critical patent/JP7036275B2/ja
Publication of WO2020189770A1 publication Critical patent/WO2020189770A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
    • B05C3/109—Passing liquids or other fluent materials into or through chambers containing stationary articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation

Definitions

  • the present invention relates to a coating device and a coating method for coating a water treatment filter with a slurry.
  • the water treatment filter is manufactured by coating a filter member mainly composed of a porous material, for example, a porous ceramic, with a coating agent called a slurry.
  • a slurry coating agent for example, Patent Document 1 discloses a method of impregnating the internal skeleton structure of the ceramic integrated catalyst carrier member with a slurry of a coating substance.
  • the outer surface of the integrated product is a ceramic film (hereinafter, may be referred to as “exodermis”) which is not porous but has water content. It is assumed that it is covered. This is because when the exodermis contains water, a water film is formed due to the surface tension of water, which makes it non-breathable, and the inside of the filter covered with the exodermis can be kept in a vacuum.
  • the outer skin deteriorates and peels off from the water treatment filter during the actual use for water treatment after coating. As a result, the treated water becomes dirty with the exodermis. This tendency becomes more remarkable as the water treatment time by the water treatment filter becomes longer.
  • the present invention relates to a filter member in which the porous ceramic is exposed on the outer surface, that is, a water treatment filter coating device capable of reliably coating the porous ceramic of the partition wall member with slurry even if the filter member has no outer skin. It is an object of the present invention to provide a coating method.
  • the slurry is housed in a water treatment filter coating device for coating a filter member having a plurality of flow paths partitioned by a porous ceramic partition wall with a slurry.
  • the housing is configured to satisfy the condition that the gap L is d or less, the decompression means capable of depressurizing the inside of the housing, and the communication means for communicating the tank, the housing, and the decompression means.
  • the housing may have a cylindrical shape.
  • the outer diameter of the outer surface of the filter member is R
  • the equivalent diameter of the flow path of the filter member is d
  • the inner diameter of the inner surface of the side wall portion of the housing is W.
  • W is preferably (R + 2d) or less.
  • at least a part of the inner side surface of the side wall portion of the housing may be made of an elastic material.
  • the coating method of the water treatment filter for coating the filter member having a plurality of flow paths partitioned by the partition wall of the porous ceramic with a slurry is described in the filter member.
  • the equivalent diameter of the flow path is d and the gap between the inner surface of the side wall portion of the housing for storing the filter member and the outer surface of the filter member is L, the housing that satisfies the condition that the gap L is d or less.
  • the slurry stored in the tank communicating with the housing is sucked into the inside of the housing and flowed into the housing, and the slurry is introduced into the filter member. After infiltrating into the housing, the slurry was discharged from the housing.
  • the housing may have a cylindrical shape, and the cylindrical filter member may be coated with the slurry.
  • the outer diameter of the outer surface of the filter member is R
  • the equivalent diameter of the flow path of the filter member is d
  • the inner diameter of the inner surface of the side wall portion of the housing is W.
  • W is preferably (R + 2d) or less.
  • the slurry may be sucked and flowed into the inside of the housing in a state where the inside of the tank is open to the atmosphere. Further, the slurry may be sucked into the inside of the housing and flowed into the housing after the inside of the housing is decompressed by the decompression means to deform the side wall portion of the housing inward.
  • the slurry may be discharged from the housing after the inside of the housing is depressurized by the decompression means to deform the side wall portion of the housing inward.
  • the porous ceramic of the partition wall member can be reliably coated with slurry, so that a water treatment filter without an outer skin can be obtained, and thus the outer skin deteriorates and peels off. It can solve the problem of water pollution caused by falling.
  • embodiment 1 the coating apparatus and coating method for the water treatment filter of the first embodiment (hereinafter, may be referred to as embodiment 1), which is a preferred embodiment of the present invention, will be described with reference to the drawings.
  • FIG. 1A and 1B are views showing the shape of the filter member 1 according to the first embodiment, where FIG. 1A is a plan view and FIG. 1B is a front sectional view. Since the end face and the side wall of the filter member 1 have a structure without an outer skin, the material of the porous ceramic is exposed.
  • the filter member 1 of the first aspect has a cylindrical shape, has a cylindrical outer surface having an outer diameter R, and is further partitioned by a partition wall 2 of a porous ceramic, and a plurality of flow paths 3 (more specifically). It has a flow path 3a and a flow path 3b).
  • the filter member to be coated is not limited to a cylindrical shape, and has a non-circular shape such as an ellipse, a triangle, a square, a rectangle, or a polygon in a cross-sectional view in the direction perpendicular to the extending direction of the flow path. It may be.
  • the plurality of flow paths 3 are arranged side by side in the first direction and the second direction which are not parallel to each other on the end faces when viewed in the plan view of FIG. 1 (a), and the front cross section of FIG. 1 (b). When viewed in the figure, it has sealing portions 4 alternately provided on either the inflow side end face or the outflow side end face.
  • the sealing portion 4 is preferably made of a material that does not allow water and a cleaning liquid to permeate. Further, it is preferable that there is little deterioration or elution when the product is in contact with water or a cleaning liquid for a long time. Examples of materials include ceramics, sealants (silicone, epoxy, acrylic), adhesives and caulks.
  • the first flow path 3b has an opening on the inflow side of water before treatment (bottom in FIG. 1B) and the outflow side of water after treatment on the opposite side is sealed by a sealing portion 4.
  • the second flow path 3a in which the outflow side of the treated water (upper in FIG. 1B) is opened and the inflow side of the water before the treatment on the opposite side is sealed by the sealing portion 4.
  • the first flow path and the second flow path are alternately arranged in the first direction and the second direction, respectively.
  • d corresponds to the length of one side.
  • the material of the porous ceramic may be cordierite, alumina, silica, magnesia, titania, etc., but it is not limited to the above as long as a porous filter can be formed.
  • a porous filter can be formed.
  • cordierite and alumina which are easy to mold because of their small coefficient of thermal expansion, are preferable.
  • FIG. 2 is a block diagram showing a schematic configuration of the coating apparatus according to the first embodiment.
  • the coating device 200 according to the first aspect includes a tank 6 for storing the slurry 5, a housing 7 for storing the filter member 1, a pump 9 which is a decompression means capable of decompressing the inside of the housing 7, and a tank 6.
  • the housing 7 and the pipes 8 and 10 and the valves 80 and 110 which are the communication means for communicating the decompression means (pump 9).
  • the coating device 200 of the first aspect satisfies the condition that the gap L between the inner surface of the side wall portion of the housing 7 and the outer surface of the filter member 1 is equal to or less than the equivalent diameter d of the flow path of the filter member 1. It is configured to include.
  • the components of the coating device 200 of the first aspect will be described in detail.
  • Slurry 5 is a liquid for coating the filter member 1.
  • the slurry 5 may be reused a predetermined number of times after coating one filter member 1.
  • the tank 6 is a container for storing the slurry 5.
  • the tank 6 is provided with an opening 6 g as an atmosphere introduction structure.
  • the housing 7 has an internal space that houses the filter member 1 and is filled with the slurry 5.
  • the internal space of the housing 7 may be simply abbreviated as "inside".
  • the housing may be made of a transparent material whose inside can be visually recognized from the outside in whole or a part thereof. By providing a transparent region such as a transparent window with a transparent material, it is possible to check the coating status of the filter member and the discharge status of the slurry from the outside of the housing.
  • the pump 9 which is a decompression means is a pump for removing air inside the housing 7 (in other words, depressurizing the internal space of the housing 7) in order to allow the slurry 5 to flow into the housing 7.
  • the pump 9 may have an ability to send air into the housing 7 (in other words, pressurize the internal space of the housing 7) in order to promote the discharge of the slurry 5 temporarily filled in the housing 7.
  • the pump 9 has an atmosphere introduction structure (not shown), and the inside of the housing 7 can be released to the atmosphere via a communication means.
  • the direction of gravity is the direction from the top to the bottom of the paper surface in FIG.
  • the housing 7, and the tank 6 are positioned from the top, so that the slurry 5 is moved from the housing 7.
  • Gravity can be used when discharging.
  • the present invention is not limited to this, and if the pump 9 has a pressurizing capacity, the above-mentioned hierarchical relationship may not be satisfied.
  • the pipes 8 and 10 that are the communication means are components that connect the tank 6, the housing 7, and the pump 9 that is the decompression means.
  • the tubes 8 and 10 may be rigid or elastic.
  • the valves 80 and 110 are installed in the pipes 8 and 10, respectively, to form a communication means.
  • pipes 8 and 10 and valves 80 and 110 which are communication means, are arranged as follows.
  • a valve 110 is arranged in the pipe 10 that connects the tank 6 and the housing 7. Since the pipe 10 needs to extend into the liquid of the slurry 5, the end portion extends below the upper surface of the tank 6.
  • a valve 80 is arranged in the pipe 8 that connects the housing 7 and the pump 9.
  • FIG. 3 is a flowchart showing a processing flow of the coating method according to the first embodiment.
  • the main body that performs each coating process is described as an operator, but some or all of the processes may be performed by a software program (or a computer that executes the program) (other embodiments described below). The same applies to).
  • the gap L is A step of storing the filter member in a housing satisfying the condition of d or less is included.
  • Step A The operator checks whether the slurry 5 is sufficiently contained in the tank 6 (S11), and if the amount of the slurry 5 is insufficient (YES in S11), the slurry 5 is used. It is supplied to the tank 6 (S12). If a sufficient amount of slurry 5 is already stored in the tank 6 (NO in S11), (S12) is unnecessary.
  • Step B The operator stores the filter member 1 in the housing 7 that satisfies the above-mentioned gap L condition (S13). Note that (S12) and (S13) may be interchanged or may be performed at the same time.
  • Step C The worker causes the slurry 5 to flow from the tank 6 to the housing 7 (S14).
  • this process will be referred to as a "slurry inflow process”.
  • Step D The operator waits until the filter member 1 housed in the housing 7 is sufficiently infiltrated with the slurry 5 (S15).
  • the waiting time is considered to be, for example, about 5 minutes. If the housing 7 is provided with a transparent window or the like that allows the inside to be visually recognized from the outside, the operator monitors the filter member 1 from the transparent window or the like and performs this step at the timing when bubbles do not come out from the filter member 1. You may finish.
  • Step E The worker discharges the slurry 5 from the housing 7 (S16).
  • the discharged slurry 5 is returned to the tank 6.
  • this step will be referred to as a "slurry discharge step".
  • the valve 110 may be a three-way valve to branch the pipe 10 (not shown), and the slurry 5 may be discharged to a tank (not shown) different from the tank 6.
  • Step F The worker takes out the filter member 1 from the housing 7 from which the slurry 5 is discharged (S17), and ends a series of steps.
  • FIG. 4 is a flowchart showing details of the slurry inflow step in the coating method according to the first embodiment. Note that FIG. 4 also shows a flowchart showing details of the slurry inflow step in the coating method according to the second embodiment described later.
  • the valve when the valve is described as "closed", it may include a state in which the flow of fluid in the pipe can be most restricted in terms of the function of the valve. In other words, even if some fluid leaks from the closed valve, it may be treated as "closed”.
  • Step C11 The operator opens the valves 110 and 80 (S141).
  • Step C12 The operator turns on the decompression operation of the pump 9 (S142). As a result, the inside of the housing 7 is depressurized, and the slurry 5 that has entered the tank 6 is sucked and flows into the housing 7 (S143). At that time, the water level of the slurry 5 in the tank 6 drops. As shown in FIG. 2, since the inside of the tank 6 is opened to the atmosphere by the opening 6 g, the gas deficient due to the water level drop inside the tank 6 can be replenished from the atmosphere, so that the suction of the slurry can be shortened in a short time. It can be carried out.
  • Step C13 When the operator confirms that a sufficient amount of the slurry 5 is stored in the housing 7 (YES in S144), the decompression operation of the pump 9 is turned off (S145), and the slurry 5 is further housing. Prevent it from flowing into 7.
  • step C11 it was assumed that the valve 110 was opened in (S141), but the timing for opening the valve 110 from the closed state was after the decompression operation of the pump 9 was turned on (S142) in step C12. You may.
  • the slurry discharge step (S16) for discharging the slurry 5 stored in the housing 7 to the tank 6 and returning the slurry 5 is as follows.
  • Step E11 The operator introduces the atmosphere into the housing 7 from the atmosphere introduction structure (not shown) of the pump 9 through the pipe 8 while keeping the valve 80 open. As a result, the pressure inside the housing 7 returns to atmospheric pressure.
  • Step E12 The operator opens the valve 110.
  • the slurry 5 contained in the housing 7 returns to the tank 6 by the action of atmospheric pressure and gravity. Since the gas that is no longer needed due to the rise in the water level of the slurry 5 inside the tank 6 is released to the atmosphere from the opening 6 g of the tank 6, the slurry can be discharged in a short time.
  • the above is the details of the slurry discharge step (S16) of the first aspect.
  • the side wall of the housing of aspect 1 is made of a rigid body.
  • a housing having a rigid side wall may be referred to as a rigid side wall housing.
  • the housing 7 shown in FIG. 2 illustrates the case of a rigid side wall housing.
  • rigid body means that the housing or a member of the housing is not significantly deformed by the fluctuations of gravity, air pressure, and water pressure, which are the sources of the force applied to the housing. It does not mean that it does not deform at all.
  • FIG. 5 is a perspective view showing the appearance of the rigid side wall housing, which is the housing of the coating device according to the first embodiment.
  • the housing 7 of FIG. 5 has a lid 7-1, a side wall 7-2, and a bottom 7-3, and the side wall 7-2 is made of a rigid body.
  • the dotted line in the figure indicates the back surface and the inner wall which cannot be seen from the viewpoint of the perspective view.
  • the cushioning members 7-10 described later are exposed inside the housing 7, they are shown by solid lines for convenience of illustration.
  • the housing 7 has a structure in which the lid 7-1 and the side wall 7-2 can be separated. Due to this structure, the upper portion of the side wall 7-2 of the housing 7 also serves as an entrance / exit port, so that the operator separates the lid 7-1 (opens the lid 7-1) and puts the filter member 1 into the housing 7. Can be stored in or retrieved from.
  • the entrance / exit may be installed at another location.
  • the lid 7-1 has an opening 7-4 for connecting to the pipe 8 shown in FIG. Since the housing 7 has an axially symmetrical shape, the opening 7-4 is preferably provided so as to include the geometric center of the lid 7-1.
  • the bottom 7-3 has an opening 7-5 for connecting to the pipe 10 shown in FIG.
  • the openings 7-5 are provided to include the geometric center of the base 7-3.
  • the shape examples of the openings 7-4 and 7-5 are through holes having a circular cross section as shown in FIG. Further, as a part of the openings 7-4 and 7-5, a pipe for facilitating the connection with the pipes 8 and 10 may be provided outside the openings 7-4 and 7-5.
  • the inner surfaces of the lid 7-1 and the bottom 7-3 do not have to be flat, and may be a funnel-shaped conical surface.
  • the side wall 7-2 is fixed to the bottom 7-3 and is fixed in a separable state from the lid 7-1. Since the fixed portion between the side wall 7-2 and the lid 7-1 is required to be watertight and airtight, the contact portion between the side wall 7-2 and the lid 7-1 should have a fastening structure provided with a screw groove. Is preferable.
  • O-rings 7-10T and 7-10B exemplified by O-rings are arranged on the lid 7-1 and the bottom 7-3 as cushioning members 7-10 having elastic force.
  • the lid 7-1 and the bottom 7-3 are brought into contact with the filter member 1 via the elastic O-rings 7-10T and 7-10B. Therefore, the filter member 1 can be stably fixed inside the housing 7.
  • the fact that there is a variation in the residual ratio of slurry in each flow path in the filter member means that the water treatment performance, which is the ability of the filter member, more specifically, the water treatment speed (the flow rate at which the filter member can treat water per unit time). ) And the removal rate of the predetermined component.
  • the water treatment performance which is the ability of the filter member, more specifically, the water treatment speed (the flow rate at which the filter member can treat water per unit time).
  • the removal rate of the predetermined component is because if the slurry remains in the flow path above the specified value and the coating is excessive, the flow path (particularly the partition wall made of porous ceramic) is clogged and the water treatment rate of the filter member is reduced. To do.
  • the removal rate of the predetermined component decreases.
  • the variation in the residual ratio of the slurry is large, for example, when trying to prioritize the removal of a predetermined component, it is necessary to retain more slurry based on the variation, that is, to sacrifice the water treatment rate by the variation. There is. In order to maximize both the water treatment rate, which is the water treatment performance of the filter member, and the removal ratio of the predetermined component, it is important to reduce the variation in the residual ratio of the slurry in the coating.
  • FIG. 6 is a plan view showing a state in which the filter member is inserted into the rigid side wall housing shown in FIG.
  • FIG. 6 is a view of the housing 7 in which the filter member 1 is inserted from above with the lid 7-1 shown in FIG. 5 removed, and the centers of the filter member 1 and the housing 7 coincide with each other.
  • W is the inner diameter of the inner surface of the side wall portion of the housing 7 (hereinafter, may be referred to as “inner wall diameter” or “W”)
  • R is the outer diameter of the outer surface of the filter member 1.
  • L indicates a gap between the inner surface of the side wall portion of the housing 7 and the outer surface of the filter member 1 (hereinafter, may be simply referred to as “gap L”). Since the filter member 1 is inserted so that the center thereof coincides with the center of the housing 7, the gap L is half the difference between W and R (WR) / 2.
  • the outer diameter R of the outer surface of the filter member 1 was set to 25.4 mm, and the length d of one side of the flow path 3 of the filter member was set to 2 mm.
  • the filter member 1 was prepared.
  • the filter member 1 was installed and stored in the center of the housing 7 and coated with a slurry by the coating device and the coating method of the mode 1, to prepare a plurality of filter members 1 under the condition that the dimensions of the gap L are different. The filter member once coated was not reused.
  • the standard deviation was calculated by measuring the variation in the residual ratio of the slurry of the plurality of coated filter members.
  • the residual ratio of the slurry is the volume (estimated from the weight) of the slurry remaining in the porous ceramic of the partition wall that partitions all the flow paths included in the filter member, and partitions all the flow paths included in the filter member. It is the ratio with the volume of the slurry that can be held in the porous ceramic of the partition wall as the denominator.
  • FIG. 7 is a graph showing the relationship between the difference (WR) between the inner wall diameter W of the housing and the outer diameter R of the outer surface of the filter member and the variation in the residual ratio of the slurry.
  • the horizontal axis represents the difference between W and R (WR)
  • the vertical axis represents the variation in the residual ratio of the slurry as a standard deviation.
  • the inventors of the present invention improved the slurry discharge property and the uniformity of the slurry discharge in the slurry discharge process to reduce the variation in the residual ratio of the slurry, and as a result, there was no outer skin.
  • the gap L between the inner surface of the side wall portion of the housing and the outer surface of the filter member is defined by the following equation 1. However, it has been found that it is necessary to satisfy the condition that the equivalent diameter d or less of the flow path of the filter member is satisfied.
  • the outer diameter R of the outer surface of the filter member and the filter The condition of the equivalent diameter d of the flow path of the member and the inner diameter W of the inner surface of the side wall portion of the housing is preferably that W is (R + 2d) or less.
  • the inner wall diameter W of the housing is the outer diameter of the filter member.
  • the outer diameter of the side surface must be R (25.4 mm) or more and R + 4 mm (29.4 mm) or less.
  • the gap L between the inner surface of the side wall portion of the housing and the outer surface of the filter member must satisfy the condition that the equivalent diameter d or less of the flow path of the filter member is satisfied. ..
  • the coating apparatus and coating method for the water treatment filter of the second embodiment (hereinafter, may be referred to as aspect 2), which is the embodiment according to the present invention, will be described with reference to the drawings.
  • aspect 2 when the equivalent diameter of the flow path of the filter member is d and the gap between the inner surface of the side wall portion of the housing and the outer surface of the filter member is L, the gap L is d or less.
  • the equivalent diameter of the flow path of the filter member is d and the gap between the inner surface of the side wall portion of the housing and the outer surface of the filter member is L, the gap L is d or less.
  • FIG. 8 is a block diagram showing a schematic configuration of the coating apparatus according to the second embodiment.
  • the coating device 200 of the second aspect is basically composed of a tank 6, a housing 7, and a pump 9 which is a decompression means, similarly to the coating device of the first aspect.
  • the configurations of the communicating means for communicating the housing 7 and the depressurizing means (pump 9) are different. That is, in the coating device of the second aspect, a plurality of pipes and valves which are communication means are installed.
  • the coating apparatus of aspect 2 is composed of tubes 8, 8-2, 10, 10-2, 10-3, 10-4 and valves 80, 81, 100, 110, 120, 130. ..
  • the housing 7 is a rigid side wall housing, and the direction of gravity is the direction from the top to the bottom of the paper surface in FIG. 8, and the positional relationship between the pump 9, the housing 7, and the tank 6 is set from above. ..
  • the components of the coating device 200 of the second aspect will be described in detail, but the same components as the coating device 200 of the first aspect are indicated by the same or similar reference numerals, and the description will be omitted without repeating in principle.
  • the pipes 8, 8-2, 10, 10-2, 10-3, and 10-4 which are the means of communication, are components connecting the tank 6, the housing 7, and the pump 9, and are typically a plurality of components. Exists.
  • the tubes 8, 8-2, 10, 10-2, 10-3, and 10-4 may be rigid bodies or elastic bodies.
  • the valves 80, 81, 100, 110, 120 and 130 are installed in pipes 8, 8-2, 10, 10-2, 10-3 and 10-4, respectively, to form communication means.
  • pipes 8, 8-2, 10, 10-2, 10-3, 10-4 and valves 80, 81, 100, 110, 120, 130, which are communication means, are arranged as follows. ing.
  • valve 10-2 A valve 110 is arranged in the pipe 10-2 that connects the tank 6 and the housing 7. Since the pipe 10-2 needs to extend into the liquid of the slurry 5, the end portion extends below the upper surface of the tank 6.
  • a valve 80 is arranged in the pipe 8 that connects the housing 7 and the pump 9.
  • a valve 81 is arranged in the pipe 8-2 that branches from the pipe 8 (however, between the housing 7 and the valve 80) and is released to the atmosphere.
  • valve 10-4 A valve 130 is arranged in the pipe 10-4 connecting the pump 9 and the tank 6. Since it is preferable that the pipe 10-4 does not extend into the liquid of the slurry 5, it is terminated at the upper surface of the tank 6.
  • the valve 100 is arranged in the pipe 10 that branches from the pipe 10-4 (however, between the valve 130 and the tank 6) and is connected between the housing 7 of the pipe 10-2 and the valve 110. There is.
  • a valve 120 is arranged in the pipe 10-3 that branches from the pipe 10 and is released to the atmosphere between the portion 10-40 where the pipe 10 branches from the pipe 10-4 and the valve 100. ing.
  • the coating device 200 of the second aspect will be described. Assuming that the pipes 10-2 and 10-3 (below the branch source of the pipe 10) are arranged along the direction of gravity (vertical direction on the paper surface in FIG. 8; the same applies hereinafter), the coating method described later can be used. In the slurry discharging process of the above, the movement of the slurry by gravity is smooth, and the amount of the slurry remaining in the pipe 10 can be reduced.
  • the branch point 10-20 with the pipe 10-2 is above the branch point 10-40 with the pipe 10-4 so as to follow the flow direction of the slurry 5. It is preferable that there is no or few parallel portions extending in the direction perpendicular to the direction of gravity, that is, in the left-right direction of the paper surface in FIG. With this configuration, the amount of slurry remaining in the pipe 10 can be reduced in the slurry discharge step in the coating method described later.
  • the pump 9 does not necessarily have to be one.
  • a pump that performs a decompression operation in the slurry inflow step and a pump that performs a decompression operation in the slurry discharge step may be configured as separate pumps.
  • the valve 81 and the pipe 8-2 may be omitted, and the pump that was performing the decompression operation in the slurry inflow process may be switched to the pressurization operation, or the pump may be released to the atmosphere. Good.
  • the coating method of the second aspect is basically the same as the coating method of the first aspect, and the coating process is carried out through the steps A to F according to the flowchart of FIG. 3 described above, but the details of the slurry inflow step and the slurry The details of the discharge process are different.
  • the details of the slurry inflow process and the details of the slurry discharge process in the second aspect will be described with reference to the flowcharts of FIGS. 4, 9 and 10.
  • FIG. 4 is a flowchart showing details of the slurry inflow step in the coating method according to the second embodiment.
  • the slurry inflow step (S14) of the second aspect is as follows.
  • Step C22 The operator turns on the decompression operation of the pump 9 (S142). As a result, the inside of the housing 7 is depressurized, and the slurry 5 that has entered the tank 6 is sucked and flows into the housing 7 (S143). At that time, the water level of the slurry 5 in the tank 6 drops. As shown in FIG. 8, a route leading to the tank 6 is secured from the pipe 10-3 released to the atmosphere via the valves 120 and the pipes 10 and 10-4 in the open state. As a result, since the inside of the tank 6 is released to the atmosphere, the gas deficient due to the water level drop inside the tank 6 can be replenished from the atmosphere, so that the slurry can be sucked in a short time.
  • Step C23 When the operator confirms that a sufficient amount of the slurry 5 is stored in the housing 7 (YES in S144), the decompression operation of the pump 9 is turned off (S145), and the slurry 5 is further housing. Prevent it from flowing into 7.
  • step C21 it was assumed that the valve 110 was opened in (S141), but the timing for opening the valve 110 from the closed state is after the decompression operation of the pump 9 is turned on (S142) in step C22. There may be.
  • the slurry discharge step (S16) for discharging the slurry 5 stored in the housing 7 to the tank 6 and returning the slurry 5 is as follows.
  • the slurry discharge step (S16) has two methods, a natural discharge step and a reduced pressure discharge step.
  • the natural discharge process is a slurry discharge method that utilizes gravity when discharging the slurry 5 from the housing 7.
  • the slurry discharge step in the details of the slurry discharge step of the first embodiment described above (step E11 and step E12) is a natural discharge step.
  • the decompression discharge step is a slurry discharge method utilizing the decompression or pressurizing capacity of the pump 9, which is a decompression means, when the slurry 5 is discharged from the housing 7.
  • a natural discharge step or a reduced pressure discharge step, or a method in which both are used in combination may be adopted.
  • the reduced pressure discharge step may be performed after the natural discharge step, or the process may be performed in the reverse order.
  • FIG. 9 is a flowchart showing a natural discharge process among the details of the slurry discharge process in the coating method according to the second embodiment.
  • the natural discharge step in the slurry discharge step (S16) of the second aspect is as follows.
  • Step E21 The operator closes the valve 80 and opens the valve 81 (S1601). As a result, the atmosphere is introduced into the housing 7 from the pipe 8-2 released to the atmosphere, and the pressure inside the housing 7 returns to the atmospheric pressure.
  • Step E22 The operator closes the valves 100 and 130 and opens the valves 110 and 120 (S1602).
  • the slurry 5 contained in the housing 7 returns to the tank 6 by the action of atmospheric pressure and gravity.
  • the gas that is no longer needed due to the rise in the water level of the slurry 5 inside the tank 6 is released to the atmosphere from the pipe 10-3 via a part of the pipe 10-4, a part of the pipe 10, and the valve 120.
  • Slurry can be discharged naturally in a short time.
  • the above is the natural discharge step in the slurry discharge step (S16) of the second aspect.
  • FIG. 10 is a flowchart showing a decompression discharge step among the details of the slurry discharge step in the coating method according to the second embodiment.
  • the decompression discharge step in the slurry discharge step (S16) of the second aspect is as follows.
  • Step E201 The operator opens the valve 81 (S1611). As a result, the atmosphere is introduced into the housing 7 from the pipe 8-2 released to the atmosphere, and the pressure inside the housing 7 returns to the atmospheric pressure.
  • Step E202 The operator closes the valves 80, 120, 110 and opens the valves 130, 100 (S1612).
  • Step E203 The operator turns on the decompression operation of the pump 9 (S1613). As a result, the air pressure in the pipeline formed in step E202 is reduced, so that the slurry 5 remaining in the housing 7 is discharged. The slurry 5 falls into the tank 6 from the portion 10-40 where the pipe 10 branches from the pipe 10-4 due to the action of gravity. Further, the gas that is no longer needed due to the rise in the water level of the slurry 5 inside the tank 6 is sucked by the pump 9 through the pipe 10-4.
  • the above is the decompression discharge step in the slurry discharge step (S16) of the second aspect.
  • the coating apparatus and coating method for the water treatment filter of the third embodiment (hereinafter, may be referred to as aspect 3), which is the embodiment according to the present invention, will be described with reference to the drawings.
  • the gap L is d or less.
  • the housing of the third aspect is made of an elastic material at least a part of the inner side surface of the side wall portion thereof.
  • a housing in which a part of the side wall portion is made of an elastic body may be referred to as an elastic side wall housing.
  • the elastic side wall housing can solve the problem of both installation positions that the center of the filter member and the housing do not match.
  • FIG. 11 is a perspective view showing the appearance of the elastic side wall housing of the housing of the coating device according to the third embodiment.
  • FIG. 12 is a cross-sectional view showing a state in which the filter member is inserted into the elastic side wall housing shown in FIG.
  • the housing 71 of the third aspect differs in that the side wall 7-2 of the housing 7 of the first aspect shown in FIG. 5 is a side wall 71-2f including an elastic body, and the other configurations are basically aspects. It is configured in the same manner as the housing 7 of 1.
  • reference numeral 7 is replaced with reference numeral 71, and the description thereof will be omitted.
  • the outer diameter of the side wall 71-2f and the outer diameter of the lid 71-1 may be substantially the same.
  • the side wall 71-2f including the elastic body is composed of the elastic body part 71-2fe and the rigid body part 71-2fr.
  • the side wall 71-2f may be composed of elastic parts 71-2fe as a whole.
  • the rigid body part 71-2fr is preferably fixed to a lid 71-1 or a bottom 71-3 having a screw groove on the outside and a screw groove on the inside by screwing.
  • the side wall 71-2f has a ring-shaped rubber-like elastic body 71-10T and 71-10B, a lid 71-1 and a bottom 71-3, and a rigid body part in order to improve watertightness and airtightness. It may be sandwiched between 71-2fr.
  • the elastic body part 71-2fe is preferably flexible from the viewpoint of deformation performance described later, but is fixed when it is fixed by screw fastening or by ring-shaped rubber-like elastic bodies 71-10T and 71-10B. From the viewpoint of securing force, a rigid body is preferable. Further, since the side wall 71-2f is inferior in workability when the filter member 1 is taken in and out if it is broken by buckling, it is preferable that the side wall 71-2f is hard enough to stand on its own with the lid 71-1 removed. ..
  • the length of the rigid body part 71-2fr is made longer than the length of the side wall of the lid 71-1 to finish closing the lid 71-1 to the side wall 71-2f ( Alternatively, it is preferable because a length that allows the operator to grip the side wall 71-2f can be secured at the time of starting to open.
  • a fastening means other than screws may be used as long as the fixing force can be secured.
  • a configuration or fixing method other than the ring-shaped rubber-like elastic bodies 71-10T and 71-10B may be used.
  • the lid 71-1 and the side wall 71-2f have a structure that can be opened and closed.
  • the equivalent diameter of the flow path of the filter member is set to d by the reduction of the gap due to the deformation of the elastic side wall housing, and the inner surface of the side wall portion of the housing and the outside of the filter member.
  • the gap with the side surface is L
  • the condition that the gap L is d or less can be satisfied.
  • the elastic body parts (71-2fe) constituting the side wall (71-2f) including the elastic body of the elastic body side wall housing have sufficient deformation performance while having appropriate rigidity and hardness.
  • the slurry is chemically resistant. Functions required as elastic parts such as deformation performance and chemical resistance can be obtained by appropriately selecting the material and its elastic force and thickness.
  • a material suitable for elastic parts the amount of change in the thickness of the material after contact with the slurry at room temperature for one week or less is 1% or less, and the decrease in Young's modulus, which indicates the elastic modulus, is 5% or less. It is a material that is.
  • materials having these characteristics include materials that combine one or more types from the composition group of fluororubber, and Kalrez (“Kalrez” is a registered trademark of DuPont), which is classified as a perfluoroelastomer of fluororubber. Conceivable.
  • the material of the elastic body part may be a material having dilatancy characteristics.
  • the dilatancy property is a property that is an elastic body while stress is applied and fluidly flows when the stress is removed.
  • PU Polyurethane
  • Polyurethane (PU) can be considered as a material having dilatancy characteristics and resistance to slurry.
  • the elastic body part may be composed of a multi-layer structure made of a plurality of different materials.
  • the surface of the inner surface of the elastic part that is in direct contact with the slurry has a layer of individual composition (for example, polyurethane), and the layer inside the polyurethane layer has a stronger dilatancy property, that is, liquid plastic (for example, polyurethane).
  • the coating apparatus of the third embodiment (aspect 3) will be described. Since the coating device of the third aspect is basically configured in the same manner as the coating device of the first aspect or the second aspect, detailed description thereof will be omitted except for the preferable components in the coating device of the third aspect described below. ..
  • a pressurizing means capable of pressurizing the inside of the housing.
  • a pump as a pressurizing means capable of pressurizing the inside of the housing in the pipe 8-2.
  • a pump capable of pressurizing the inside of the housing is installed, and after the slurry discharge step and before the step of taking out the filter member 1 from the housing 71, the pressurizing operation of the pump is turned on and the housing 71 When the inside is pressurized, the elastic body part 71-2fe is deformed outward and separated from the filter member 1, so that the filter member 1 can be easily taken out from the housing 71.
  • the housing may have the functions of both the rigid side wall housing and the elastic side wall housing.
  • the housing is configured by arranging a side wall 7-2 (shown in FIG. 5) made of a rigid body described in the first aspect on the outside of the side wall 71-2f including the elastic part 71-2fe. May be good.
  • a side wall 7-2 shown in FIG. 5
  • the side wall 7-2 made of a rigid body on the outside, it is possible to prevent the side wall 71-2f including the elastic body from being deformed to the outside when the housing is filled with slurry, and also supports the lid 71-1. be able to.
  • the coating method of the third embodiment is basically the same as the coating method of the first aspect, and the coating process is carried out through the steps A to F according to the flowchart of FIG. 3 described above, but the elastic body side wall housing is inside.
  • the slurry inflow process and the slurry discharge process are different in that they are deformed.
  • the details of the slurry inflow step and the details of the slurry discharge step in the third aspect will be described only for the steps different from those of the first and second aspects, and the description of the same steps will be omitted.
  • FIG. 13 is a flowchart showing details of the slurry inflow step in the coating method according to the third embodiment.
  • the elastic body part 71-2fe of the side wall 71-2f of the elastic side wall housing is deformed inward prior to the inflow of the slurry 5 into the housing 71. That is, in the slurry inflow step (S14) of the first aspect or the second aspect, the steps C31 to C33 described below are performed before the step C11 or the step C21, respectively.
  • the valve that opens and closes in the slurry inflow step of aspect 3 differs due to the difference in the configuration of the coating device of aspect 1 and aspect 2, in the following description, the valve that opens and closes by the coating device of aspect 1 is described in [].
  • the valve that opens and closes with the coating device of aspect 2 is shown outside [].
  • the slurry inflow step (S14) of the third aspect is as follows.
  • Step C31 The operator closes [Valve 110] and valves 100, 110, 130 and 81, and opens [Valve 80] and valve 80 (S1401).
  • Step C32 The operator turns on the decompression operation of the pump 9 (S1402). As a result, the inside of the housing 7 is depressurized (S1403), and the elastic body part 71-2fe is deformed inward.
  • Step C33 The operator checks the deformation of the elastic body part 71-2fe (S1404), and after confirming that the elastic body part 71-2fe is sufficiently deformed (YES in S1404), [Valve 110 ], The valves 110 and 120 are opened (S1405).
  • the timing of changing the valve 120 from the closed state to the open state in (S1405) in step C33 is the elastic body part 71 in (S1404). It may be before confirming that -2fe is sufficiently deformed.
  • the slurry discharge step (S16) of the third aspect basically discharges the slurry from the housing in the same step as the slurry discharge step of the first or second aspect, but is elastic among the above-mentioned natural discharge step and the reduced pressure discharge step. It is preferable to employ a reduced pressure discharge step in that the body side wall housing can be deformed inward. However, even in the case of the natural discharge process, if the slurry flow rate between the outer surface of the filter member and the inner surface of the elastic side wall housing is smaller than the flow rate of the flow path of the filter member, the natural discharge process is adopted. You may.
  • the pump is before the step E201 in the decompression discharge step of the second aspect in which the valve 81 is opened and the pressure inside the housing 71 is set to the atmospheric pressure.
  • the depressurization operation of 9 may be turned on to depressurize the inside of the housing 71.
  • the filter member in a water treatment filter using a porous ceramic as a partition wall member, the filter member has a configuration in which the porous ceramic is exposed on the outer surface without being covered with the outer skin. Even if there is, it has become possible to reliably coat the porous ceramic of the partition member with the slurry. This makes it possible to use the water treatment filter without having an outer skin, and it has become possible to eliminate the problem of water pollution caused by the outer skin being deteriorated and peeled off.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Ceramic Engineering (AREA)
  • Coating Apparatus (AREA)
  • Geology (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Ce dispositif d'enrobage pour enrobe r un élément filtrant cylindrique avec une suspension, l'élément filtrant cylindrique ayant une pluralité de passages d'écoulement qui sont séparés par des parois de séparation en céramique poreuse, de façon à enrober de manière fiable la céramique poreuse de l'élément de séparation avec une suspension, dans un filtre de traitement de l'eau dans lequel la peau externe est retirée de façon à ne pas provoquer de contamination de la qualité de l'eau due à la peau externe, est configurée pour avoir : un réservoir pour stocker la suspension; un boîtier qui stocke l'élément de filtrage et satisfait la condition dans laquelle, lorsque d'est le diamètre équivalent du passage d'écoulement de l'élément filtrant, et L est l'espace entre la surface interne d'une section de paroi latérale du boîtier et la surface latérale externe de l'élément filtrant, l'espace L est égal ou inférieur à d; un moyen de réduction de pression qui peut réduire la pression à l'intérieur du boîtier; et un moyen de communication qui fournit une communication entre le réservoir, le boîtier et le moyen de réduction de pression.
PCT/JP2020/012409 2019-03-20 2020-03-19 Dispositif d'enrobage et procédé d'enrobage de filtre de traitement d'eau WO2020189770A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003230808A (ja) * 2002-02-08 2003-08-19 Ngk Insulators Ltd 多孔質フィルタ、浄水器、フィルタの製造方法並びにフィルタを製造するための圧入方法、圧入装置、シール方法及びシール剤の施与装置
JP2007526827A (ja) * 2004-03-05 2007-09-20 ジョンソン、マッセイ、パブリック、リミテッド、カンパニー 触媒作用を付与したセラミックウォール−フローフィルターの製造方法
JP2008161799A (ja) * 2006-12-28 2008-07-17 Ngk Insulators Ltd セラミックフィルタの製造方法
JP2009254985A (ja) * 2008-04-17 2009-11-05 Ne Chemcat Corp ハニカム構造体の含浸方法、ハニカム型構造触媒の製造方法、及び得られるハニカム構造型触媒
WO2018062521A1 (fr) * 2016-09-30 2018-04-05 日立金属株式会社 Procédé et dispositif de fabrication d'un filtre en nid d'abeilles en céramique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003230808A (ja) * 2002-02-08 2003-08-19 Ngk Insulators Ltd 多孔質フィルタ、浄水器、フィルタの製造方法並びにフィルタを製造するための圧入方法、圧入装置、シール方法及びシール剤の施与装置
JP2007526827A (ja) * 2004-03-05 2007-09-20 ジョンソン、マッセイ、パブリック、リミテッド、カンパニー 触媒作用を付与したセラミックウォール−フローフィルターの製造方法
JP2008161799A (ja) * 2006-12-28 2008-07-17 Ngk Insulators Ltd セラミックフィルタの製造方法
JP2009254985A (ja) * 2008-04-17 2009-11-05 Ne Chemcat Corp ハニカム構造体の含浸方法、ハニカム型構造触媒の製造方法、及び得られるハニカム構造型触媒
WO2018062521A1 (fr) * 2016-09-30 2018-04-05 日立金属株式会社 Procédé et dispositif de fabrication d'un filtre en nid d'abeilles en céramique

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