WO2003099416A1 - Filtre en nid d'abeille et son procede de fabrication, support pour filtre, dispositif de lavage a contre-courant et collecteur de poussiere - Google Patents

Filtre en nid d'abeille et son procede de fabrication, support pour filtre, dispositif de lavage a contre-courant et collecteur de poussiere Download PDF

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Publication number
WO2003099416A1
WO2003099416A1 PCT/JP2003/006458 JP0306458W WO03099416A1 WO 2003099416 A1 WO2003099416 A1 WO 2003099416A1 JP 0306458 W JP0306458 W JP 0306458W WO 03099416 A1 WO03099416 A1 WO 03099416A1
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WO
WIPO (PCT)
Prior art keywords
filter
honeycomb filter
honeycomb
outer frame
cylindrical
Prior art date
Application number
PCT/JP2003/006458
Other languages
English (en)
Japanese (ja)
Inventor
Yoshiaki Hori
Kazumasa Yashiro
Fumiyasu Nagai
Original Assignee
Ngk Insulators, Ltd.
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 Ngk Insulators, Ltd. filed Critical Ngk Insulators, Ltd.
Priority to AU2003242426A priority Critical patent/AU2003242426A1/en
Priority to JP2004506936A priority patent/JP4685444B2/ja
Publication of WO2003099416A1 publication Critical patent/WO2003099416A1/fr

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Classifications

    • 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
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2093—Ceramic foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2484—Cell density, area or aspect ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0013—Modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2455—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the whole honeycomb or segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2482—Thickness, height, width, length or diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2418—Honeycomb filters
    • B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
    • B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations

Definitions

  • the present invention relates to a honeycomb filter and a method for manufacturing the same, a filter holder using the honeycomb filter, a backwashing device, and a dust collector using the same, and more particularly, to a dust collector having a large processing capacity.
  • the present invention relates to a large-sized honeycomb filter having characteristics suitable as a filter, a method for manufacturing the same, a filter holder, a backwashing device, and a dust collector having a high processing capability in which these are combined.
  • filters used in dust collectors have been mainly bag filters made of paper, fiber, or polymer resin, but in recent years, environmental measures such as pollution prevention and product recovery from high-temperature gas have been implemented. From the viewpoint of energy recovery and clean high-temperature energy recovery, not only the temperature range where the conventional bag filter can be used (low temperature range) but also the temperature range above 250 ° C (high temperature range) where the bag filter cannot be used. The market where dust collection work is required in the region) is expanding.
  • ceramics have excellent heat resistance and corrosion resistance, and have favorable characteristics as a filter material used not only in the conventional low-temperature range but also in the atmosphere exposed to high temperatures and corrosive gases. It is used as various ceramic spheres. In dust collection using such a ceramic filter, dust in the gas enters from the upstream side and is trapped on the surface of the filtration surface when the gas passes through the porous partition wall and passes through the downstream hole. Is done.
  • the shape of the ceramics filter can be a tubular shape or a shape called a candle type which is a closed-end tubular shape with one closed.
  • a filter having a honeycomb structure honeycomb filter
  • the honeycomb filter 1 has a structure in which the upstream side B and the downstream side C of the cell openings of many cells 3 are alternately sealed for each cell, and the honeycomb filter 1 enters from the upstream side B.
  • the gas passes through the porous partition wall 2 and passes through the hole on the downstream side C, and at that time, dust in the gas is captured on the surface of the partition wall 2.
  • honeycomb filter When manufacturing a larger honeycomb filter, there is a problem that the formed body before drying and firing is easily deformed by its own weight, and the cell is crushed or deformed, or the whole honeycomb filter is deformed. It was extremely difficult to manufacture an 82-cam filter without causing any problems. Therefore, it is extremely difficult to provide a desired filter having a sufficiently large filtration area without fabricating a filter block by combining honeycomb filters. At present, it was necessary to make a Phil Evening block.
  • the honeycomb filter etc. When incorporating the honeycomb filter or filter block into the dust collector, etc., the honeycomb filter etc. should be made of metal outer frame for the convenience of installation work and to prevent mixing of untreated gas and treated gas. It is common to hold it inside the body to form a filter holding body and incorporate it. However, as the size of the honeycomb filter and filter block increases, the size of the outer frame for holding them also increases, and their weight increases. For this reason, problems may occur in the reliability of the holding to the outer frame, the ease of handling, etc. Normally, compressed air in the direction opposite to the exhaust gas flow direction is introduced into the filter installed in the dust collector, etc., and the trapped substances (dust, etc.) captured by the filter are periodically removed. Perform washing. FIG.
  • FIG. 10 is a perspective view schematically showing a state in which a conventional backwashing device is attached to a filter block.
  • the backwashing device 40 increases in size and weight, making it difficult to incorporate it into the dust collector. Further, in the backwashing device 40, the space for introducing the compressed air into the filter block 7 is increased, so that the pressure rise is slow, and it is difficult to perform effective backwashing.
  • the present invention has been made in view of such problems of the related art, and has as its object a large-sized honeycomb filter having a very large filtration area, the above-described honeycomb filter, a cell and a honeycomb filter.
  • Another object of the present invention is to provide a highly reliable dust collector having a high processing capability. Disclosure of the invention
  • a plurality of cells which are partitioned into an 82-cam shape by a partition having a porous structure and serve as a fluid flow path, and one cell opening of the predetermined cell, and the remaining A cylindrical honeycomb filter made of ceramics, wherein the partition walls function as a filtration layer by plugging portions alternately formed in the other cell openings of the cell, and one of the cylindrical end faces from the other cylindrical end face.
  • the length is 5 0 0 ⁇ 1 0 0 0 mm to the end face, the maximum outer dimensions of 2 0 0 ⁇ 3 5 0 mm of the tube end face, and filtration area of the filtration layer is 4 m 2 or more Is provided.
  • the ceramic is preferably cordierite, and it is preferable to provide one or more filter layers on at least one surface of the partition walls.
  • a forming body made of a raw material mixture containing a ceramic raw material is extruded in the direction of gravity, and a honeycomb-shaped formed body provided with a plurality of cells serving as flow paths for fluids partitioned by partition walls. And arranged in the extrusion direction
  • the molded body is dried by passing air through a plurality of cells to obtain a dried body.
  • a plugging material is press-fitted into one cell opening of the predetermined cell of the dried body and the other cell opening of the remaining cells, and then fired, whereby the partition wall functions as a filtration layer.
  • a cushioning material is provided between the outer peripheral surface of any one of the honeycomb fillers and the inner peripheral surface of the cylindrical outer frame body made of metal, and the cushioning material is compressed.
  • the honeycomb fill is held inside the outer frame body, and is extended in at least one of the cylindrical ends of the outer frame body or in the vicinity thereof in the central axis direction of the outer frame body.
  • a bend comprising a falling-off preventing portion of the honeycomb filter, and between the falling-off preventing portion and an outer edge of at least one of the cylindrical end surfaces of the 82-cam filter, the cushioning material or the cushioning material.
  • a filter holder provided with an outer edge cushioning member separate from the filter holder.
  • the outer frame body preferably has a flange on at least one of the cylindrical ends or an outer peripheral surface in the vicinity thereof, and the outer frame body preferably has a thickness of 1 mm or less.
  • the shape of the honeycomb filter is cylindrical.
  • the honeycomb filter is installed on the downstream side of the gas flow path of the honeycomb filter arranged in the dust collector, and compressed air is introduced into the 82-cam filter from the downstream side, whereby the honeycomb filter is A backwash apparatus for removing trapped trapped matter, comprising: a cylindrical main flow path pipe serving as a flow path of the compressed air; one end connected to a side surface of the main flow path pipe; It is characterized by comprising one or more cylindrical branch flow pipes having connection means with the filter, and compressed air introduction means arranged to introduce compressed air into the main flow pipe.
  • a backwash apparatus is provided.
  • the exhaust gas to be processed flows into the gas flow path and the gas flow path from one of the cylindrical end faces of the honeycomb filter, and the processed gas is discharged from the other cylindrical end face.
  • the backwashing is connected to one of the filter holders installed as described above, and the other one of the cylindrical end faces of the honeycomb filter held by the filter holder, and performs the backwashing of the honeycomb filter.
  • Dust collecting device comprising: An apparatus is provided. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a schematic diagram showing one embodiment of the honeycomb filter of the present invention.
  • FIG. 2 is a schematic diagram showing a plugged state at an open end face of a honeycomb filter.
  • FIG. 3 is a schematic diagram showing an example of a method of forming a filter layer.
  • FIG. 4 is a perspective view showing a general configuration of a honeycomb filter.
  • FIG. 5 is a drawing showing an embodiment of the filter holder of the present invention, wherein FIG. 5 (a) is a top view and FIG. 5 (b) is a cross-sectional view as seen from the front.
  • FIGS. 6 (a) and 6 (b) are partial cross-sectional views showing an example of the drop prevention portion of the filter holder of the present invention.
  • FIG. 7 is a drawing schematically showing an example of a method for producing a filter holder.
  • FIG. 8 is a drawing schematically showing another example of a method for producing a filter holder.
  • FIG. 9 is a drawing showing one embodiment of the backwashing device of the present invention.
  • FIG. 9 (b) is a front view
  • FIG. 9 (c) is a cross-sectional view as viewed from the side.
  • FIG. 10 is a perspective view schematically showing a state in which a conventional backwashing device is attached to a filter block.
  • FIG. 11 is a drawing schematically showing one embodiment of the dust collecting apparatus of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
  • the present invention comprises a plurality of cells which are partitioned into honeycomb shapes by partition walls having a porous structure and serve as a fluid flow path, and one cell opening of a predetermined cell and the other cell opening of the remaining cells
  • FIG. 1 is a schematic diagram showing one embodiment of the honeycomb filter of the present invention.
  • the honeycomb fill 1 according to the present embodiment includes a plurality of cells 3 serving as a fluid flow path, and these cells 3 are configured by being partitioned by a partition 2 into a honeycomb shape.
  • the partition 2 has a porous structure provided with a large number of fine pores (communication holes) having a filtering ability, which communicate from one surface to the other surface.
  • a plugging portion 10 is formed at one cell opening of the predetermined cell.
  • a plugging portion 10 is similarly formed in the other cell opening of the remaining cell other than the above-mentioned predetermined cell.
  • the honeycomb filter of the present invention has a length X (hereinafter, referred to as “full length”) from one cylinder end face 4 to the other cylinder end face 5 of 500 to 100. 0 mm, the maximum outer dimension Y of the cylinder end face (hereinafter simply referred to as the “maximum outer dimension”) is 200 to 350 ⁇ , and the filtration area of the filtration layer is 4 m 2 or more.
  • a honeycomb filter made of conventional general ceramics (total length: 150 to 500 mm, outer diameter in the case of a cylindrical shape: 100 to 200 mm ⁇ (or one side in the case of a prismatic shape) : 50 to 150 mm) and filtration area: 0.5 to 3.9 m 2 ), which is much larger than that of conventional products.
  • the filter block has a sufficiently large filtration area even if the filter block is not made by combining the honeycomb filters, and is lighter than the filter block having the same filtration area.
  • the “filtration area” in the present invention refers to the total area (m 2 ) of the partition walls (filtration layers) of the cells constituting the honeycomb filter.
  • the “maximum outer dimension of the cylinder end face” in the present invention Is when the end face of the cylinder is circular Means the diameter, the ellipse means its major axis, the square means the diagonal length, and the other shapes or irregular shapes mean the distance between the furthest outer edges.
  • C D Kamufiru evening present invention is not particularly restricted upper limit of the filtration area, thickness and cell pitch, etc. of the partition wall, considering the substantial manufacturability, 2 0 m 2 or less I just need.
  • the thickness of the partition wall of the honeycomb filter of the present invention is preferably 0.2 to 2 mm, and the cell pitch is preferably 2.5 to 10 mm.
  • the ceramic is preferably cordierite.
  • Cordierite is a ceramic material with a small coefficient of thermal expansion and excellent thermal shock resistance. That is, since the honeycomb filter of the present invention made of cordierite has these characteristics, since it has characteristics suitable as a ceramic material constituting the honeycomb filter, the honeycomb filter has a desired size and shape. It is easily manufactured.
  • one or more filter layers are provided on at least one surface of the partition wall.
  • the provision of the fill layer increases the efficiency of capturing dust contained in the exhaust gas and reduces the pressure loss.
  • the filter layer is made of the same material as the honeycomb filter used as the base material on which the filter layer is formed, so that no difference in thermal expansion occurs even under high temperature conditions.
  • this material is made of cordierite. Therefore, even under a high temperature condition of about 900 ° C., there is an effect that peeling or falling off of the filler layer due to a difference in thermal expansion between the layers does not occur.
  • Another aspect of the present invention is a method for manufacturing the above-described large-sized honeycomb filter, comprising extruding a forming clay made of a raw material mixture containing a ceramics raw material in the direction of gravity, and forming a fluid flow path partitioned by partition walls.
  • the molded body is housed in a can having a mesh-shaped bottom arranged in the extrusion direction, and the molded body is housed in the can.
  • the molded body is dried by passing air through a plurality of cells to obtain a dried body, and a plugging material is inserted into one cell opening of a predetermined cell of the dried body and the other cell opening of the remaining cells. After press-fitting, firing is performed to obtain a honeycomb filter in which the partition walls function as a filtration layer. The details are explained below. I do.
  • a raw material for example, a raw material mixture that becomes cordierite when fired (a raw material mixture for cordierite) is prepared, and to this, water and various additives such as an organic binder are added as needed.
  • kneading is performed using a clay kneading machine or the like to obtain a forming clay.
  • this forming clay it is extruded to form a honeycomb structure having a predetermined size.
  • a vertical extruder capable of extruding the kneaded clay input from above downward is used. That is, by extruding in the direction of gravity (downward), problems such as cell bending due to its own weight can be avoided.
  • a honeycomb structure having a predetermined cell pitch can be manufactured by a general extrusion molding method.
  • the extruded honeycomb formed body is extruded into a can having a predetermined shape. This can is adapted to the size of the honeycomb formed body to be extruded, and the bottom is a mesh-like plate (mesh plate) having air permeability.
  • the material forming the can may be a material that is unlikely to be thermally deformed during subsequent drying.
  • hot air at 100 to 150 ° C. is passed through the cell from below to above the molded body through the above-mentioned mesh plate to obtain a dried body.
  • the time required for drying depends on the water content in the compact, the dimensions of the compact, the temperature of the hot air, etc., but is about 1 to 5 hours.
  • a plugging material About the obtained dried body, as shown in FIG. 1 and FIG. 2, using a plugging material, one cell opening of many cells 3 is alternately sealed on the upstream side and the downstream side for each cell.
  • the plugging portion 10 is formed by press-fitting a plugging material.
  • the sealing material used at this time is preferably a material mainly composed of ceramics of the same material as the base material, and thus, when used under high temperature conditions, the sealing portion caused by a difference in thermal expansion between the materials. This has the effect of making it difficult for defects such as cracks or the like to occur on the partition walls.
  • the dried body after plugging is kept at 1200 to 150 ° C. at the highest temperature for 1 to 4 hours (total firing time: about 3 days) and fired, whereby the honeycomb of the present invention is obtained. Filter can be obtained.
  • each process is performed from extrusion molding to drying while products such as a molded body and a dried body are stored in a can. This prevents problems such as cell bending due to its own weight can do.
  • the average pore diameter and the porosity of the honeycomb filter of the present invention produced by the method described above are in the range of 10 to 50 zm, and the porosity is in the range of 40 to 60%.
  • the pressure loss is 150 to 700 Pa.
  • the “average pore diameter” refers to a value measured by a mercury intrusion method
  • the “porosity” refers to a value measured according to JISR225.
  • the processing apparatus 30 shown in FIG. 3 may be used.
  • the processing apparatus 30 includes a slurry tank 32 on a magnet stirrer 31, and supplies the slurry in the slurry tank 32 to the honeycomb filter 1 by the pressure of the air A.
  • the slurry tank 32 is used to prepare a slurry of ceramic particles having a predetermined concentration.
  • the slurry having a uniform concentration is prepared by the stirring action of the magnet stirrer 31 and the prepared slurry is injected into the slurry. It is supplied to one end of the honeycomb filler 1 connected to the fitting 33 via the mounting fitting 34, and is introduced into the inside from one cell opening.
  • the supply amount of the slurry is monitored by a liquid level gauge 35 provided in the slurry tank 32, and when the supply amount reaches a predetermined value, the supply of the slurry is stopped. Thereafter, the honeycomb fill 1 is inverted to discharge the internal filtered water.
  • the water in the introduced slurry gradually permeates through the partition walls (filtration layers) of each cell and flows out to the outside. The particles inside gradually adhere to one side surface of the partition to form a layer of particles.
  • the slurry is prepared by adding an organic binder in advance and stirring and mixing with a homomixer in a plastic container.
  • a filter layer After forming a layer made of ceramic particles in this way, this is dried and kept at 1200 to 150 ° C. at the maximum temperature for 1 to 4 hours (total firing time: about 1 day) Then, if firing is performed, a filter layer can be formed.
  • the second and subsequent filter layers may be formed in the same manner as described above after firing the first filter layer.
  • Still another aspect of the present invention is a filter holding body in which a honeycomb filter is held inside a predetermined outer frame body, A cushioning material is provided between the outer peripheral surface of any one of the honeycomb filters described above and the inner peripheral surface of the cylindrical outer frame body made of metal, and the outer frame body is compressed in a state where the cushioning material is compressed. And a honeycomb filter drop-off prevention portion that extends or bends in the center axis direction of the outer frame body at or near at least one end of the cylinder of the outer frame body.
  • FIG. 5 (a) and 5 (b) are drawings showing an embodiment of the filter holder of the present invention.
  • FIG. 5 (a) is a top view
  • the filter holding body 14 of the present invention has a configuration in which a cylindrical honeycomb filter 1 is also housed inside a cylindrical outer frame 11 made of metal, and the outer peripheral surface of the honeycomb filter 1 and the outer frame 11
  • a predetermined cushioning material 13 is provided between itself and the inner peripheral surface. It is preferable that the cushioning material 13 be made of a material having an appropriate heat resistance and exhibiting a sealing property when compressed. Specific examples include a ceramic fiber blanket made of silica, alumina, or the like.
  • the filter holding body is provided with the outer frame 11 at or near at least one cylindrical end of the outer frame 11.
  • the honeycomb filter 1 is provided with fall-off preventing portions 18a, 18b that extend or bend in the direction of the central axis, and the fall-off preventing portions 18a, 18b and the outer edge portion of at least one end surface of the honeycomb filter 1 are provided.
  • a cushioning member 13 is provided between the cushioning member 21 and the cushioning member 21. As shown in FIGS. 6 (a) and 6 (b), this cushioning material is integrated with a cushioning material 13 arranged between the outer peripheral surface of the honeycomb filter 1 and the inner peripheral surface of the outer frame body 11.
  • a cushioning material (outer edge cushioning material) separate from the cushioning material 13 may be used.
  • an optimal material for each purpose may be appropriately selected as a material constituting them.
  • the honeycomb filter 1 and the outer frame body 11 holding the honeycomb filter 1 become large, it is assumed that the holding force is weakened particularly under high temperature conditions, but in the present embodiment, the honeycomb filter 1 is large. However, it has the effect that it does not fall off easily.
  • the caps 18a and 18b Since the outer edge 21 of the cylinder end surface of the two-cam filter 1 does not directly contact, and the cushioning material 13 is provided between them, when the stress is applied due to the introduction of compressed air for backwashing. Even if there is such a problem, it is possible to obtain an effect that cracks, chips, and the like are hardly generated in the outer edge portion 21 of the cylindrical end face of the honeycomb fill 1.
  • the outer frame body 11 is provided with a flange 12 on at least one cylindrical end or on the outer peripheral surface in the vicinity thereof.
  • a screw hole 19 or the like may be provided in the flange 12 in order to securely fix the filter holder to the dust collector or the like.
  • the metal constituting the outer frame 11 examples include SUS 430, SS 400 and the like from the viewpoints of securing the holding power under high temperature conditions and economical efficiency.
  • the thickness of the outer frame body is preferably 1 mm or less, more preferably 0.7 mm or less. As a result, there is an effect that the produced filter holder is reduced in weight. If the thickness of the outer frame is more than lmm, it is not preferable because the shape processing is difficult and the weight is increased, so that the handling becomes difficult when incorporated into the dust collector.
  • the lower limit of the thickness of the outer frame is not particularly limited, but may be 0.3 mm or more in consideration of the necessity of securing substantial strength.
  • a predetermined buffer material 13 or an outer edge buffer material (not shown) separate from the buffer material 13 is temporarily fixed to the outer peripheral surface of the honeycomb filter 1.
  • the outer frame 11 and the honeycomb filter 1 are cylindrical in shape. This is advantageous in that, as compared with, for example, a case where these are prismatic, they can be easily manufactured by press-fitting as shown in FIG.
  • the operation of welding the contact points of the outer frames 11a and 11b becomes unnecessary. It can be easily manufactured.
  • the flange 12 of the outer frame 11 in FIG. 7 and the falling-off preventing portion 18b may be welded after press-fitting.
  • a honeycomb filter is disposed downstream of a gas flow path of a honeycomb filter arranged in a dust collector, and is captured by the honeycomb filter by introducing compressed air from the downstream to the honeycomb filter.
  • This is a backwashing device that removes trapped matter.
  • It has a cylindrical main flow pipe that serves as a compressed air flow path, one end of which is connected to the side surface of the main flow pipe, and a connection means that connects with the honeycomb filter Characterized by comprising one or more cylindrical branch flow pipes, and compressed air introduction means arranged to introduce compressed air into the main flow pipe.
  • FIGS. 9 (a) to 9 (c) are drawings showing an embodiment of the backwashing device of the present invention.
  • FIG. 9 (a) is a top view
  • FIG. 9 (b) is a front view
  • FIG. 9 (c). Is a sectional view seen from the side.
  • the backwashing device 40 according to the embodiment of the present invention includes a cylindrical main flow pipe 41 into which compressed air is first introduced, one or more cylindrical branch flow pipes 42 connected to the side surface, and A compressed air introduction means (compressed air introduction pipe 9 and backwash valve 43) is provided so as to introduce compressed air into the flow path pipe 41.
  • a predetermined connecting means is provided at an end of the branch flow pipe 42 opposite to the end connected to the main flow pipe 41, and the honeycomb filter 1 (the filter holder) to be backwashed is provided. 20) can be connected.
  • FIGS. 9 (a) to 9 (c) show a state in which the backwashing device 40 and the filter holder 20 connected to the backwashing device 40 are incorporated in the dust collecting device 8.
  • the compressed air introduction means connected to the main flow pipe 41 include a combination of a compressed air introduction pipe 9 and a backwash valve 43 for introducing compressed air into the compressed air introduction pipe 9.
  • Compressed air introduction means may be provided to introduce compressed air from the outside of the dust collector 8 to the main flow pipe 41 via the backwash valve 43.
  • Fig. 9 (a)-Fig. 9 As shown in (c), the compressed air introduction pipe 9 and the backwash valve 43 are arranged at predetermined intervals so that the central axes of the backwash valves 43 are substantially the same, and the dust collector 8 is used.
  • the treated gas is discharged out of the system from between the end of the compressed air introduction pipe 9 and the end of the backwash valve 43, and at the time of backwash, the direction of the compressed air introduction pipe 9 from the backwash valve 43. What is necessary is just to be comprised so that compressed air can be introduce
  • the shape of the main flow tube 41 constituting the backwashing device 40 according to the embodiment of the present invention is cylindrical. For this reason, compared to the conventional backwashing device 40 shown in FIG. 10, the space above the honeycomb filter 1, which is the object of backwashing, is narrow and the pressure rises quickly, so that the compressed air introduced into this space is Minimized. For this reason, even if the honeycomb filter 1 is large, the compressed air can be efficiently introduced, and the backwash of the honeycomb filter 1 can be effectively performed. Further, the amount of the material constituting the backwashing device 400 itself, for example, metal such as SS400, is minimized and the weight is reduced. Therefore, even if it is large, it can be easily incorporated into the dust collecting device 8 and the like, and the reliability of the installation is high.
  • Still another aspect of the present invention is a dust collecting device for removing dust and the like from incinerator exhaust gas mainly containing the dust and the like.
  • One of the filter holders described above which is installed so that the exhaust gas to be treated flows in from one end of the cylinder and the treated gas exits from the other end of the cylinder, and is held by the filter holder.
  • a backwash device connected to the other cylindrical end face of the honeycomb filter for performing backwash of the honeycomb filter. The details are described below.
  • FIG. 11 is a drawing schematically showing one embodiment of the dust collecting apparatus of the present invention.
  • the dust collecting device 8 according to the embodiment of the present invention includes a gas collecting device such as a chimney 17 from a source of an exhaust gas to be treated such as an incinerator 16 having a heating / incineration means such as a burner 15.
  • a gas passage leading to the discharge means is provided, and on the way of this gas passage, the exhaust gas to be treated flows in from one end face of the honeycomb filter and the treated gas is discharged from the other end face.
  • the filter holder 14 is installed on the filter holder.
  • a backwashing device 40 is connected to the end face of the cylinder, and is configured to perform backwashing of the honeycomb fill.
  • the backwashing device 40 is connected to a compressor (not shown) connected to the outside of the dust collecting device 8 via a compressed air introducing pipe 9 and a backwashing valve so that compressed air is introduced. Is configured. Further, a dust box 6 for collecting trapped matter (dust) removed by back washing may be provided below the dust collecting device 8.
  • Exhaust gas fine exhaust gas containing fine particles such as dust, generated in the incinerator, enters the dust collector 8 from a predetermined location.
  • the to-be-processed exhaust gas enters from one end face of the honeycomb filter held inside the filter holder 14, and fine particles such as dust are captured by the filtration layer.
  • the gas that has passed through the filtration layer (processed gas) is discharged from the other end face of the honeycomb filter, and is discharged into the atmosphere as clean gas from discharge means such as the dust collector 8 and the chimney 17.
  • the outer edge of the cylinder end face is not easily broken or chipped. Further, the backwashing device 40 can efficiently introduce compressed air even if the honeycomb filter used in the dust collecting device 8 is large, so that the backwashing can be performed effectively. Yes, and because of its light weight, the reliability of incorporating it into the dust collector 8 is high.
  • the dust collecting device of the present invention has a very high exhaust gas treatment capability because a large-sized honeycomb filter is incorporated with high reliability.
  • the honeycomb filter can be efficiently backwashed, it has characteristics suitable for long-term continuous use.
  • a raw material mixture that becomes cordierite when fired (a raw material mixture for cordierite formation) is prepared, and water and predetermined additives are added thereto, and the mixture is mixed using a kneader. After the combination, the mixture was kneaded with a kneading machine to obtain a forming clay. The obtained kneaded material was extruded into a predetermined can into a cylindrical honeycomb shape using a vertical extruder to obtain a formed body.
  • the dried product was obtained by passing hot air at 130 ° C. from the bottom of the molded product upward through a mesh plate at the bottom of the can in a vertical position for 3 hours, followed by drying.
  • the obtained dried product was placed vertically in place.
  • the total length of the obtained honeycomb filter is 700 mm, the outer diameter (maximum outer dimension) is 250 m ⁇ , the filtration area is 8 m 2 , and the average pore diameter (measured by the mercury intrusion method) is 15 ⁇ . m, porosity (according to JISR225) was 40%, cell pitch was 6 mm, and partition wall thickness was 1 mm. Further, as a result of visual evaluation, it was not possible to confirm the occurrence of defects such as deformation and crushing in the cells and the entire honeycomb filter. Industrial applicability
  • the honeycomb filter according to the present invention has a so-called large-sized honeycomb filter in which the length from one open end face to the other open end face, the maximum outer dimension of the open end face, and the filtration area are within predetermined numerical ranges. Since it is a honeycomb filter, it has a large exhaust gas treatment capacity and has characteristics suitable mainly as a filter for dust collectors.
  • the forming clay is extruded in the direction of gravity to form a honeycomb-shaped formed body, and is stored in a predetermined can. Since it is dried and baked in the state of being housed inside, it is possible to manufacture an 82-cam filter even though it is large, without causing problems such as deformation and collapse in the cell and the whole cell.
  • the filter holding body of the present invention comprises a cushioning material between the honeycomb filter and the outer frame.
  • the honeycomb filter is held inside the outer frame body in a state where the cushioning material is compressed, and the honeycomb filter falling-off prevention portion is provided at a predetermined position of the outer frame body via the cushioning material. Since it is equipped, it has high reliability in holding it to the outer frame and has excellent handling.
  • the backwashing device of the present invention comprises a cylindrical main flow pipe, a tubular branch flow pipe connected to the side surface of the main flow pipe, and having a connection means with the honeycomb filter. Since it is provided with the compressed air introduction means connected to the flow channel pipe, it is light in weight and can efficiently perform backwashing of the honeycomb filter connected to the branch flow pipe.
  • the gas flow path, the predetermined filter holding body installed in a predetermined state in the gas flow path, and the honeycomb filter held by the filter holding body are connected. Since it is equipped with a predetermined backwashing device that performs backwashing of the honeycomb filter, it has a very high processing capacity and a highly reliable dust collection device, and the efficiency of the 82-cam filter is improved. Since it can be easily backwashed, it has characteristics suitable for long-term continuous use.

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  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention concerne un filtre en nid d'abeille en céramique, tubulaire (1), comprenant une pluralité d'alvéoles (3) formant les passages d'écoulement d'un fluide, disposés en nid d'abeille et séparés par des parois de séparation (2) ayant une structure poreuse. Les parois de séparation (2) servent de couches filtrantes. Ces couches filtrantes sont composées de couches filtrantes comprenant un élément d'obturation (10) à une extrémité, alternées avec d'autres couches filtrantes comprenant un élément d'obturation (10) à l'autre extrémité. La distance entre une extrémité (4) et l'autre extrémité (5) d'une alvéole du filtre (1) est comprise entre 500 et 1000 mm, les dimensions extérieures maximales des extrémités des alvéoles sont comprises entre 200 et 350 mm, et les surfaces filtrantes des couches filtrantes sont supérieures ou égales à 4 m2. Ce filtre permet d'augmenter la capacité de traitement d'un gaz effluent. L'invention concerne également des caractéristiques permettant d'utiliser le filtre comme un collecteur de poussière.
PCT/JP2003/006458 2002-05-24 2003-05-23 Filtre en nid d'abeille et son procede de fabrication, support pour filtre, dispositif de lavage a contre-courant et collecteur de poussiere WO2003099416A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003242426A AU2003242426A1 (en) 2002-05-24 2003-05-23 Honeycomb filter and method of manufacturing the honeycomb filter, filter holder, backwashing device, and dust collector
JP2004506936A JP4685444B2 (ja) 2002-05-24 2003-05-23 ハニカムフィルタの製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002150759 2002-05-24
JP2002-150759 2002-05-24

Publications (1)

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WO2003099416A1 true WO2003099416A1 (fr) 2003-12-04

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JP (1) JP4685444B2 (fr)
AU (1) AU2003242426A1 (fr)
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Publication number Priority date Publication date Assignee Title
JP2006255574A (ja) * 2005-03-16 2006-09-28 Ibiden Co Ltd ハニカム構造体
JP2007229564A (ja) * 2006-02-28 2007-09-13 Ngk Insulators Ltd セラミックフィルタの製造方法
JP2010234341A (ja) * 2009-03-31 2010-10-21 Ngk Insulators Ltd ハニカム構造体の製造方法
JP2014014795A (ja) * 2012-07-11 2014-01-30 Metawater Co Ltd セラミックフィルタ及びセラミックフィルタ集塵装置

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JP2001340718A (ja) * 2000-06-02 2001-12-11 Ngk Insulators Ltd ハニカムフィルタ用基材及びその製造方法

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US20010002008A1 (en) * 1992-07-23 2001-05-31 Hiroshi Yorita Monolithic ceramic filter
JPH07241424A (ja) * 1994-03-08 1995-09-19 Mitsubishi Heavy Ind Ltd 集じん機の逆洗装置
JP2001289041A (ja) * 2000-04-07 2001-10-19 Ibiden Co Ltd 排ガス浄化用触媒コンバーター及びディーゼルパティキュレートフィルターシステム，並びにこれらの製造方法
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JP2006255574A (ja) * 2005-03-16 2006-09-28 Ibiden Co Ltd ハニカム構造体
US8003190B2 (en) 2005-03-16 2011-08-23 Ibiden Co. Ltd Honeycomb structure
JP2007229564A (ja) * 2006-02-28 2007-09-13 Ngk Insulators Ltd セラミックフィルタの製造方法
JP2010234341A (ja) * 2009-03-31 2010-10-21 Ngk Insulators Ltd ハニカム構造体の製造方法
JP2014014795A (ja) * 2012-07-11 2014-01-30 Metawater Co Ltd セラミックフィルタ及びセラミックフィルタ集塵装置

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