WO2003099416A1 - Honeycomb filter and method of manufacturing the honeycomb filter, filter holder, backwashing device, and dust collector - Google Patents

Honeycomb filter and method of manufacturing the honeycomb filter, filter holder, backwashing device, and dust collector 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
French (fr)
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 JP2004506936A priority Critical patent/JP4685444B2/en
Priority to AU2003242426A priority patent/AU2003242426A1/en
Publication of WO2003099416A1 publication Critical patent/WO2003099416A1/en

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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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  • Engineering & Computer Science (AREA)
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Abstract

A tubular ceramics honeycomb filter (1), comprising a plurality of cells (3) forming the flow passages of fluid partitioned in a honeycomb shape by partition walls (2) of porous structure, wherein the partition walls (2) function as filter layers by sealed parts (10) alternately formed at one cell opening parts of specified cells (3) and the other cell opening parts of the remaining cells (3), characterized in that a length between the one tube end face (4) and the other tube end face (5) of the filter (1) is 500 to 1000 mm, the maximum outside dimensions of the tube end faces are 200 to 350 mm, and the filtering areas of the filtering layers are 4 m2 or larger, whereby a flue gas processing capacity can be increased, and characteristics suitably used mainly as a filter for dust collector can be provided.

Description

明 細 書  Specification
ハニカムフィルタ及びその製造方法、 フィル夕保持体、 逆洗装置、 並びに集塵  Honeycomb filter and manufacturing method thereof, filter holder, backwashing device, and dust collection
技術分野 Technical field
本発明は、 ハニカムフィル夕とその製造方法、 このハニカムフィルタを用いた フィルタ保持体、 逆洗装置、 及びこれらを用いた集塵装置に関し、 更に詳しくは 、 特に処理容量の大きい集塵装置用のフィルタとして好適な特性を有する大型の ハニカムフィルタとその製造方法、 フィルタ保持体、 逆洗装置、 及びこれらを組 み合わせた、 処理能力の高い集塵装置に関する。 背景技術  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. Background art
従来、 集塵装置に用いられるフィルタは、 紙、 繊維、 又は高分子樹脂等を使用 してなるバグフィルタが主流であつたが、 近年、 公害防止等の環境対策、 高温ガ スからの製品回収、 及びクリーンな高温エネルギー回収等の観点から、 従来のバ グフィルタが使用可能となる温度域 （低温域） だけでなく、 バグフィルタが使用 不可能となる 2 5 0 °C以上の温度域 （高温域） における集塵作業が必要とされる 市場が拡大しつつある。  Conventionally, 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.
このような状況下、 セラミックスは耐熱性及び耐食性に優れているとともに、 従来の低温域は勿論のこと、 高温、 腐食性ガス等に暴露される雰囲気下において も用いられるフィルタ材料として好ましい特性を有しており、 各種のセラミック スフィル夕として利用されている。 このようなセラミックスフィルタを用いた集 塵において、 ガス中のダストは、 上流側から入り、 ガスが多孔質の隔壁を通って 下流側の穴より抜けていく際に、 濾過面の表面上に捕捉される。  Under these circumstances, 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.
現在、 セラミックスフィルタの形状としては、 管状、 又は一方が閉じた有底管 状であるキャンドルタイプと呼ばれる形状のもの等を挙げることができるが、 中 でも、 ハニカム構造を有するフィル夕 （ハニカムフィル夕） は、 単位体積当りの 濾過面積が広く集塵効率に優れているために、 化学、 電力、 鉄鋼、 産業廃棄物処 理の分野等、 多岐に渡る分野において採用される集塵装置用のフィル夕として好 適な特性を有するものである。 At present, 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. Among them, a filter having a honeycomb structure (honeycomb filter) is preferred. ) Is a filter for dust collectors used in a wide variety of fields such as chemical, electric power, steel, industrial waste treatment, etc. because of its large filtration area per unit volume and excellent dust collection efficiency. Good as evening It has suitable characteristics.
なお、 図 4に示すように、 ハニカムフィルタ 1は、 多数のセル 3のセル開口部 の上流側 Bと下流側 Cとを一マスごと交互に封じた構造を有し、 上流側 Bから入 つたガスは、 多孔質の隔壁 2を通って下流側 Cの穴より抜けていくが、 その際に 、 ガス中のダストは隔壁 2の表面上に捕捉される。  As shown in FIG. 4, 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.
集塵装置の処理能力をより高めるためには、 フィルタの濾過面積を広くする必 要がある。 このために、 従来、 複数のハニカムフィル夕を、 これらのセルが平行 となるように組み合わせたフィルタブロックを作製し、 これをフィルタとして装 置に組み込むことにより、 フィルタの濾過面積を広くするといつた対策がなされ ることが一般的である （例えば、 特許第 1 9 3 3 4 2 5号明細書参照） 。  In order to increase the processing capacity of the dust collector, it is necessary to increase the filtration area of the filter. For this purpose, it has been proposed that a filter block in which a plurality of honeycomb filters are combined in such a manner that these cells are parallel to each other is manufactured and incorporated into the device as a filter, thereby increasing the filtering area of the filter. It is common that countermeasures are taken (for example, see Japanese Patent No. 19334324).
しかしながら、 複数のハニカムフィルタを組み合わせてフィルタブロックを作 製するには、 複数の工程及び多大な労力が必要とされるといった問題がある。 こ のため、 複数のハニカムフィルタを組み合わせる必要のない、 より濾過面積の広 い大型のフィル夕ハニカムを製造し、 これをフィルタとして装置に組み込むこと を、 前述の問題を解消するための対策として挙げることができる。  However, producing a filter block by combining a plurality of honeycomb filters requires a plurality of steps and a great deal of labor. For this reason, as a measure to solve the above-mentioned problems, manufacturing large filter honeycombs with a larger filtration area without the need to combine multiple honeycomb filters and incorporating them into the device as a filter is mentioned. be able to.
し力、し、 より大型のハニカムフィルタを製造しょうとすると、 乾燥 ·焼成前の 成形体が自重により変形し易いといった問題があり、 セルのつぶれや変形、 又は ハニカムフィル夕全体の変形等の不具合を生ずることなく、 八二カムフィルタを 製造することは極めて困難であった。 従って、 ハニカムフィルタどうしを組み合 わせてフィル夕ブロックを作製することなく、 所望とする、 十分に広い濾過面積 を有するフィルタを提供することは極めて困難であり、 従来どおり、 労力を費や してフィル夕ブロックを作製せざるを得ないのが現状であった。  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.
なお、 ハニカムフィル夕やフィルタブロックを集塵装置等に組み込むに際して は、 組み込み作業の都合上、 及び未処理ガスと処理済ガスとの混合防止等の観点 から、 ハニカムフィルタ等を金属製の外枠体の内部に保持してフィルタ保持体と し、 これを組み込むことが一般的である。 しかし、 ハニカムフィルタやフィル夕 ブロックが大型化するに従い、 これらを保持するための外枠体も大型になり、 そ の重量が増加する。 このため、 外枠体への保持の信頼性、 取扱いの容易性等に問 題を生ずる場合も想定される。 通常、 集塵装置等に組み込まれるフィル夕には、 排ガスの流路方向とは逆方向 の圧縮空気を導入し、 フィルタに捕捉された捕捉物 （ダスト等） を定期的に除去 する、 いわゆる逆洗を行う。 図 1 0は、 従来の逆洗装置をフィルタブロックに取 り付けた状態を模式的に示す斜視図である。 ここでも、 フィルタブロック 7等の フィルタが大型化するに従い、 逆洗装置 4 0も大型化してその重量が増加し、 集 塵装置に組み込むことが困難となる。 また、 逆洗装置 4 0における、 フィルタブ ロック 7に圧縮空気を導入するための空間が増大してしまうために圧力上昇が遅 く、 効果的な逆洗を行い難いといった問題があった。 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. 10 is a perspective view schematically showing a state in which a conventional backwashing device is attached to a filter block. Again, as the size of the filter, such as the filter block 7, increases, the backwashing device 40 also 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.
本発明は、 このような従来技術の有する問題点に鑑みてなされたものであり、 その目的とするところは、 大型で、 濾過面積が極めて広いハニカムフィル夕、 前 記ハニカムフィルタを、 セルやその全体に変形やつぶれ等の不具合を生ずること なく製造する方法、 外枠体への保持の信頼性及び取扱い容易性に優れたフィルタ 保持体、 軽量であるとともに逆洗効率に優れた逆洗装置、 及び処理能力が高く、 信頼性に優れた集塵装置を提供することにある。 発明の開示  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. A method of manufacturing without causing defects such as deformation or crushing as a whole, a filter holder with excellent reliability of holding to the outer frame and easy handling, a backwashing device that is lightweight and has excellent backwashing efficiency, Another object of the present invention is to provide a highly reliable dust collector having a high processing capability. Disclosure of the invention
即ち、 本発明によれば、 多孔質構造を有する隔壁によって八二カム形状に仕切 られた、 流体の流路となる複数のセルを備え、 所定の前記セルの一方のセル開口 部と、 残余の前記セルの他方のセル開口部に交互に形成された目封じ部により、 前記隔壁が濾過層として機能する、 セラミックスからなる筒状のハニカムフィル 夕であって、 その一方の筒端面から他方の筒端面までの長さが 5 0 0〜1 0 0 0 mm、 前記筒端面の最大外寸が 2 0 0〜3 5 0 mm、 及び前記濾過層の濾過面積 が 4 m2以上であることを特徴とするハニカムフィルタが提供される。 That is, according to the present invention, there are provided 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. wherein 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.
本発明においては、 セラミックスが、 コーディエライトであることが好ましく 、 隔壁の少なくとも一方の表面上に、 一又は二層以上のフィルタ層を備えること が好ましい。  In the present invention, 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.
また、 本発明によれば、 セラミックス原料を含む原料混合物からなる成形用坏 土を、 重力方向に押し出して、 隔壁によって仕切られた流体の流路となる複数の セルを備えたハニカム形状の成形体を形成するとともに、 押出し方向に配置した 網目状の底部を備えた受缶内に収納し、 前記成形体を前記受缶内に収納した状態 で、 複数の前記セルに通風することにより前記成形体を乾燥して乾燥体を得、 前 記乾燥体の所定の前記セルの一方のセル開口部と、 残余の前記セルの他方のセル 開口部に目封じ材を圧入した後、 焼成することにより、 前記隔壁が濾過層として 機能するハニカムフィル夕を得ることを特徴とするハニカムフィル夕の製造方法 が提供される。 Further, according to the present invention, 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 In a state where the molded body is housed in a can having a mesh-shaped bottom 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. 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. There is provided a method for manufacturing a honeycomb fill, which is characterized by obtaining evening.
また、 本発明によれば、 いずれかの前記ハニカムフィル夕の外周面と、 金属か らなる筒状の外枠体の内周面との間に緩衝材を備え、 前記緩衝材が圧縮された状 態で、 前記外枠体の内部に前記ハニカムフィル夕が保持されてなるとともに、 前 記外枠体の、 少なくとも一方の筒端縁又はその近傍に、 前記外枠体の中心軸方向 に延伸又は屈曲する、 前記ハニカムフィルタの脱落防止部を備え、 かつ、 前記脱 落防止部と、 前記八二カムフィルタの少なくとも一方の前記筒端面の外縁部との 間に、 前記緩衝材又は前記緩衝材とは別体の外縁部緩衝材を備えることを特徴と するフィルタ保持体が提供される。  Further, according to the present invention, 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. In this state, 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. Or 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. And a filter holder provided with an outer edge cushioning member separate from the filter holder.
本発明においては、 外枠体の、 少なくとも一方の筒端緣又はその近傍の外周面 上にフランジを備えることが好ましく、 外枠体の厚さが 1 mm以下であることが 好ましく、 外枠体及びハニカムフィルタの形状が円筒状であることが好ましい。 また、 本発明によれば、 集塵装置に配置されるハニカムフィルタのガス流路の 下流側に設置され、 前記下流側から前記八二カムフィルタに圧縮空気を導入する ことにより、 前記ハニカムフィルタに捕捉された捕捉物を除去する逆洗装置であ つて、 前記圧縮空気の流路となる円筒状の本流路管と、 一方の端部が前記本流路 管の側面部に連結するとともに、 前記ハニカムフィル夕との接続手段を有する、 一以上の筒状の支流路管と、 前記本流路管に圧縮空気を導入するように配設され た圧縮空気導入手段とを備えてなることを特徴とする逆洗装置が提供される。 更に、 本発明によれば、 ガス流路と、 前記ガス流路に、 前記ハニカムフィル夕 の一方の前記筒端面より被処理排ガスが流入し、 他方の前記筒端面より処理済ガ スが排出するように設置されたいずれかの前記フィルタ保持体と、 前記フィルタ 保持体に保持された前記ハニカムフィル夕の、 他方の前記筒端面に接続され、 前 記ハニカムフィル夕の逆洗を行う前記逆洗装置とを備えることを特徴とする集塵 装置が提供される。 図面の簡単な説明 In the present invention, 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. Preferably, the shape of the honeycomb filter is cylindrical. Further, according to the present invention, 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. Further, according to the present invention, 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
図 1は、 本発明のハニカムフィルタの一実施形態を示す模式図である。  FIG. 1 is a schematic diagram showing one embodiment of the honeycomb filter of the present invention.
図 2は、 ハニカムフィルタの開口端面における目封じ状態を示す模式図である 図 3は、 フィル夕層の形成方法の一例を示す模式図である。  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.
図 4は、 ハニカムフィル夕の一般的構成を示す斜視図である。  FIG. 4 is a perspective view showing a general configuration of a honeycomb filter.
図 5は、 本発明のフィルタ保持体の一実施形態を示す図面であり、 図 5 ( a ) は上面図、 図 5 ( b ) は正面から見た断面図である。  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.
図 6 ( a ) 、 図 6 ( b ) は、 本発明のフィルタ保持体の脱落防止部の一例を示 す部分断面図である。  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.
図 7は、 フィルタ保持体の作製方法の一例を模式的に示す図面である。  FIG. 7 is a drawing schematically showing an example of a method for producing a filter holder.
図 8は、 フィルタ保持体の作製方法の別の例を模式的に示す図面である。 図 9は、 本発明の逆洗装置の一実施形態を示す図面であり、 図 9 ( a ) は上面 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, and FIG.
、 図 9 ( b ) は正面、 図 9 ( c ) は側面から見た断面図である。 9 (b) is a front view, and FIG. 9 (c) is a cross-sectional view as viewed from the side.
図 1 0は、 従来の逆洗装置をフィル夕ブロックに取り付けた状態を模式的に示 す斜視図である。  FIG. 10 is a perspective view schematically showing a state in which a conventional backwashing device is attached to a filter block.
図 1 1は、 本発明の集塵装置の一実施形態を模式的に示す図面である。 発明を実施するための最良の形態  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
以下、 本発明の実施の形態について説明するが、 本発明は以下の実施の形態に 限定されるものではなく、 本発明の趣旨を逸脱しない範囲で、 当業者の通常の知 識に基づいて、 適宜、 設計の変更、 改良等が加えられることが理解されるべきで ある。  Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the following embodiments, and based on ordinary knowledge of a person skilled in the art without departing from the spirit of the present invention. It should be understood that design changes, improvements, etc. are made as appropriate.
本発明は、 多孔質構造を有する隔壁によってハニカム形状に仕切られた、 流体 の流路となる複数のセルを備え、 所定のセルの一方のセル開口部と、 残余のセル の他方のセル開口部に交互に形成された目封じ部により、 隔壁が濾過層として機 能する、 セラミックスからなる筒状のハニカムフィル夕であり、 その一方の筒端 面から他方の筒端面までの長さが 5 0 0〜1 0 0 0 mm、 筒端面の最大外寸が 2 0 0〜3 5 0 mm、 及び濾過層の濾過面積が 4 m2以上であることを特徴とする ものである。 以下、 その詳細について説明する。 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 A cylindrical honeycomb filter made of ceramics, in which the partition walls function as a filtration layer due to the sealing portions alternately formed in Is the length from the surface to the other cylindrical end face 5 0 0~1 0 0 0 mm, maximum outer dimensions of the cylindrical end face 2 0 0~3 5 0 mm, and the filtration area of the filtration layer 4 m 2 or more It is characterized by the following. The details will be described below.
図 1は、 本発明のハニカムフィルタの一実施形態を示す模式図である。 本実施 の形態であるハニカムフィル夕 1は、 流体の流路となる複数のセル 3を備えてお り、 これらのセル 3は、 隔壁 2によってハニカム形状に仕切られることにより構 成されている。 また、 隔壁 2は、 その一方の表面から他方の表面に連通する、 濾 過能を有する微細な孔 （連通孔） を多数備えた多孔質構造を有している。  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. In addition, 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.
所定のセルの一方のセル開口部には、 目封じ部 1 0が形成されている。 また、 前述の所定のセル以外の、 残余のセルの他方のセル開口部にも同様に、 目封じ部 1 0が形成されている。 このような状態で目封じ部 1 0が形成されることにより 、 一方の筒端面 4から進入した排ガスは多孔質の隔壁 2を濾過層とし、 排ガス中 のダストは隔壁 2の表面上に捕捉される。 ダストが除去されたクリーンなガスは 、 他方の筒端面 5から排出される。  A plugging portion 10 is formed at one cell opening of the predetermined cell. In addition, a plugging portion 10 is similarly formed in the other cell opening of the remaining cell other than the above-mentioned predetermined cell. By forming the plugging portion 10 in such a state, the exhaust gas entering from one end face 4 of the cylinder becomes a porous partition wall 2 as a filtration layer, and the dust in the exhaust gas is captured on the surface of the partition wall 2. You. The clean gas from which dust has been removed is discharged from the other cylinder end face 5.
本発明のハニカムフィルタは、 図 1及び図 2に示すように、 その一方の筒端面 4から他方の筒端面 5までの長さ X (以下、 「全長」 と記す） が 5 0 0〜1 0 0 0 mm、 筒端面の最大外寸 Y (以下、 単に 「最大外寸」 と記す） が 2 0 0〜3 5 0 ππη φ、 及び濾過層の濾過面積が 4 m2以上である。 従って、 従来の一般的な セラミックスからなるハニカムフィルタ （全長： 1 5 0〜5 0 0 mm、 円柱状の 場合の外径： 1 0 0〜 2 0 0 mm φ (又は、 角柱状の場合の一辺： 5 0〜 1 5 0 mm) 、 濾過面積： 0 . 5〜3 . 9 m2) に比して格段に大型であり、 特に濾過 面積に関しては、 従来品の 2〜 5倍程度の広さとなっている。 このため、 ハニカ ムフィル夕どうしを組み合わせてフィル夕ブロックを作製しなくとも十分に広い 濾過面積を有するものであり、 また、 同等の濾過面積を有するフィル夕ブロック に比して軽量であることから、 集塵装置の製造に際して労力の軽減とともに、 メ ンテナンス性の向上をも図ることができる。 なお、 本発明にいう 「濾過面積」 と は、 ハニカムフィルタを構成するセルの隔壁 （濾過層） の総面積 （m2) をいう ここで、 本発明にいう 「筒端面の最大外寸」 とは、 筒端面の形状が円形の場合 はその直径、 楕円形の場合はその長径、 四角形の場合は対角線の長さ、 その他の 形や不定形の場合は、 最も離れた外縁部間の長さを意味する。 また、 本発明のハ 二カムフィル夕における、 濾過面積の上限値は特に限定されるものではないが、 隔壁の厚さやセルピッチ等、 実質的な製造可能性を考慮すれば、 2 0 m2以下で あればよい。 なお、 本発明のハニカムフィルタの隔壁の厚さは 0 . 2〜2 mmで あり、 セルピッチは 2 . 5〜 1 0 mmであることが好ましい。 As shown in FIGS. 1 and 2, 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 ππηφ, and the filtration area of the filtration layer is 4 m 2 or more. Therefore, 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 φ (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. Has become. For this reason, 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. In addition to reducing labor when manufacturing the dust collector, it is also possible to improve maintainability. 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. Here, 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. Also, in 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.
本発明においては、 セラミックスが、 コ一ディエライトであることが好ましい 。 コーディエライトは、 熱膨張係数が小さく、 耐熱衝撃性に優れたセラミックス 材料である。 即ち、 ハニカムフィルタを構成するセラミックス材料として好適な 特性を有しているために、 コ一デイエライトからなる本発明のハニカムフィルタ は、 これらの特性が生かされるとともに、 所望の寸法 '形状となるように容易に 製造されるものである。  In the present invention, 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.
また、 本発明においては、 隔壁の少なくとも一方の表面上に、 一又は二層以上 のフィルタ層を備えることが好ましい。 フィル夕層を備えることにより、 排ガス に含まれるダストの捕捉効率を上げることができるとともに、 圧力損失が低減さ れるといった効果を奏する。 なお、 フィルタ層は、 これが形成される基材となる ハニカムフィル夕と同じ材質であることが、 高温条件下においても熱膨張差が発 生することがなく、 例えば、 この材質がコ一デイエライトであって、 約 9 0 0 °C の高温条件下においても、 層間の熱膨張差に起因するフィル夕層の剥離や脱落等 が発生することがないといった効果を奏する。  In the present invention, it is preferable that 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. For example, 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.
次に、 本発明の別の側面について説明する。.本発明の別の側面は、 前述の大型 のハニカムフィルタの製造方法であり、 セラミツクス原料を含む原料混合物から なる成形用坏土を、 重力方向に押し出して、 隔壁によって仕切られた流体の流路 となる複数のセルを備えたハニカム形状の成形体を形成するとともに、 押出し方 向に配置した網目状の底部を備えた受缶内に収納し、 この成形体を受缶内に収納 した状態で、 複数のセルに通風することにより成形体を乾燥して乾燥体を得、 こ の乾燥体の所定のセルの一方のセル開口部と、 残余のセルの他方のセル開口部に 目封じ材を圧入した後、 焼成することにより、 隔壁が濾過層として機能するハニ カムフィルタを得ることを特徴とするものである。 以下、 その詳細について説明 する。 Next, another aspect of the present invention will be described. 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. In addition to forming a honeycomb-shaped molded body having a plurality of cells, 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.
原材料として、 例えば、 焼成するとコーディエライトとなる原料混合物 （コー ディエライト化原料混合物） を用意し、 これに、 水、 及び必要に応じて有機バイ ンダ一等の各種添加物を添加して、 ニーダ一等を用いて混合した後、 土練機等を 用いて土練することにより、 成形用坏土を得る。 この成形用坏土を用いて、 押出 し成形することにより、 所定の寸法のハニカム構造に成形する。 押出し成形に際 しては、 上方から投入した坏土を下方へと押し出すことができる縦押出機を使用 する。 即ち、 重力方向 （下方） に押し出すことにより、 自重によるセル曲がり等 の不具合を回避することができる。  As 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. After mixing using a kneader or the like, kneading is performed using a clay kneading machine or the like to obtain a forming clay. By using this forming clay, it is extruded to form a honeycomb structure having a predetermined size. For extrusion molding, 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.
更に、 一般的な押出し成形法により所定のセルピッチを有するハニカム構造体 を製造することができる。 押し出されたハニカム成形体を、 所定形状の受缶内に 押し出す。 この受缶は、 押し出されるハニカム成形体の寸法に合わせたものであ つて、 その底部は、 通気性を有する網目状の板 （網板） となっている。 なお、 受 缶を構成する材質は、 その後の乾燥時に熱変形等し難い材質であればよい。 次いで、 前述の網板を介して、 成形体の下方から上方へと 1 0 0〜1 5 0 °Cの 熱風をセルに通風して乾燥体を得る。 乾燥に要する時間は、 成形体に含有する水 分、 成形体の寸法、 熱風の温度等により左右されるが、 1〜 5時間程度である。 得られた乾燥体について、 図 1及び図 2に示すように、 目封じ材を用いて、 多数 のセル 3の一方のセル開口部を上流側と下流側とを一マスごとに交互に封じる。 具体的には、 目封じ材を圧入することにより目封じ部 1 0を形成する。 このとき 用いる目封じ材は、 基材と同じ材質のセラミックスを主成分とするものが好まし く、 これにより、 高温条件下での使用に際し、 材質間の熱膨張差に起因する目封 じ部の剥離や脱落、 又は隔壁にクラック等の不具合が発生し難くなるといった効 果を奏する。  Further, 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. Next, 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. 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. Specifically, 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.
目封じ後の乾燥体を、 1 2 0 0〜1 5 0 0 °C、 最高温度で 1〜4時間保持 （合 計の焼成時間：約 3日間） して焼成することにより、 本発明のハニカムフィルタ を得ることができる。 なお、 本発明のハニカムフィルタを製造するに際しては、 押出し成形から乾燥に至るまで、 成形体、 乾燥体等の製品を受缶内に収納したま ま各々の工程を実施する。 これにより、 自重によるセル曲がり等の不具合を回避 することができる。 · 上述してきた方法により製造した本発明のハニカムフィル夕の平均気孔径は 1 0〜5 0 z m、 気孔率は 4 0〜6 0 %の範囲内である。 また、 濾過流速が l mZ m i nの場合における圧力損失は 1 5 0〜7 0 0 P aである。 なお、 本発明にい う 「平均気孔径」 とは、 水銀圧入法にて測定した値をいい、 「気孔率」 とは、 J I S R 2 2 0 5に準拠して測定した値をいう。 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. When manufacturing the honeycomb filter of the present invention, 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%. Further, when the filtration flow rate is 1 mZmin, the pressure loss is 150 to 700 Pa. In the present invention, the “average pore diameter” refers to a value measured by a mercury intrusion method, and the “porosity” refers to a value measured according to JISR225.
前述の操作手順により得られたハニカムフィル夕の隔壁の表面上にフィルタ層 を形成する場合には、 図 3に示す処理装置 3 0を用いればよい。 この処理装置 3 0は、 マグネットスターラ一3 1上にスラリータンク 3 2を備え、 スラリータン ク 3 2内のスラリーをエア Aの圧力によりハニカムフィルタ 1に供給するもので ある。 スラリータンク 3 2は、 所定濃度のセラミックス粒子のスラリーを調製す るためのもので、 マグネットスタ一ラー 3 1の攪拌作用により、 均一濃度のスラ リーが調製され、 調製されたスラリーは、 スラリー注入具 3 3に取付金具 3 4を 介して接続されたハニカムフィル夕 1の一端側に供給され、 一方のセル開口部か らその内部へ導入される。 スラリーの供給量は、 スラリータンク 3 2に設けた液 面計 3 5により監視され、 供給量が所定の値に達した時点でスラリーの供給は停 止される。 その後、 ハニカムフィル夕 1を反転させて、 内部の濾過水を排出する 導入されたスラリー中の水分は、 各セルの隔壁 （濾過層） を漸次透過して、 外 部へ流出し、 この間にスラリー中の粒子が隔壁の一側面に漸次付着して、 粒子か らなる層を形成する。 なお、 スラリ一の調製は、 予め有機パインダ一を添加し、 ポリ容器内でホモミキサーにて攪拌 ·混合して行う。  When a filter layer is formed on the surface of the partition wall of the honeycomb filter obtained by the above-described operation procedure, 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.
このようにしてセラミックス粒子よりなる層を形成した後、 これを乾燥し、 1 2 0 0〜1 5 0 0 °Cにて、 最高温度で 1〜 4時間保持 （合計の焼成時間：約 1日 間） して焼成を行えば、 フィルタ層を形成することができる。 なお、 二層目以降 のフィル夕層の形成は、 一層目のフィルタ層を焼成した後、 上記と同様の方法に て行えばよい。  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.
次に、 本発明の更に別の側面について説明する。 本発明の更に別の側面は、 所 定の外枠体の内部にハニカムフィルタが保持されてなるフィルタ保持体であり、 これまで述べてきたいずれかのハニカムフィルタの外周面と、 金属からなる筒状 の外枠体の内周面との間に緩衝材を備え、 この緩衝材が圧縮された状態で、 外枠 体の内部にハニカムフィル夕が保持されてなるとともに、 外枠体の、 少なくとも 一方の筒端縁又はその近傍に、 外枠体の中心軸方向に延伸又は屈曲する、 ハニカ ムフィルタの脱落防止部を備え、 かつ、 脱落防止部と、 ハニカムフィルタの少な くとも一方の筒端面の外縁部との間に、 前述の緩衝材又はそれとは別体の外縁部 緩衝材を備えることを特徴とするものである。 以下、 その詳細について説明する 図 5 (a) 、 図 5 (b) は、 本発明のフィルタ保持体の一実施形態を示す図面 であり、 図 5 (a) は上面図、 図 5 (b) は正面から見た断面図である。 本発明 のフィルタ保持体 14は、 金属製である筒状の外枠体 11の内部に、 同じく筒状 のハニカムフィルタ 1が収納される構成であり、 ハニカムフィルタ 1の外周面と 外枠体 11の内周面との間に、 所定の緩衝材 13を備えている。 この緩衝材 13 は、 適度な弹性を有するとともに、 圧縮されることによりシール性を発揮する材 質からなるものであることが好ましい。 具体的には、 シリカ、 アルミナ等からな るセラミックスファイバ一ブランケット等を挙げることができる。 Next, another aspect of the present invention will be described. 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. In addition, the above-described cushioning material or an outer edge cushioning material separate from the above-mentioned cushioning material is provided between the falling-off preventing portion and at least one outer peripheral portion of the cylindrical end surface of the honeycomb filter. . 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, and FIG. Is a cross-sectional view as viewed from the front. 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.
本発明の実施形態であるフィルタ保持体は、 図 6 (a) 、 図 6 (b) に示すよ うに、 外枠体 11の、 少なくとも一方の筒端緣又はその近傍に、 外枠体 11の中 心軸方向に延伸又は屈曲する、 ハニカムフィル夕 1の脱落防止部 18 a, 18 b を備えるとともに、 脱落防止部 18 a， 18 bと、 ハニカムフィルタ 1の少なく とも一方の筒端面の外縁部 21との間に緩衝材 13を備えている。 この緩衝材は 図 6 (a) 、 図 6 (b) に示すように、 ハニカムフィルタ 1の外周面と外枠体 1 1の内周面との間に配置される緩衝材 13と一体のものでもよく、 この緩衝材 1 3とは別体の緩衝材 （外縁部緩衝材） であってもよい。 緩衝材 13とは別体の外 縁部緩衝材を配置する場合には、 これらを構成する材質として、 各々の目的に合 わせて最適なものを適宜選択すればよい。 ハニカムフィルタ 1及びこれを保持す る外枠体 1 1が大型になると、 特に高温条件下ではその保持力が弱まる場合が想 定されるが、 本実施形態では、 ハニカムフィル夕 1が大型であっても、 容易に脱 落することがないといった効果を奏する。 また、 脱落防止部 18 a， 18 bとハ 二カムフィルタ 1の筒端面の外縁部 21が直接的に当接することなく、 これらの 間に緩衝材 13を備えているため、 逆洗のための圧縮空気の導入により応力が加 わった場合であっても、 ハニカムフィル夕 1の筒端面の外縁部 21に割れ、 欠け 等の不具合が生じ難いといつた効果を奏する。 As shown in FIGS. 6 (a) and 6 (b), the filter holding body according to the embodiment of the present invention 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. Alternatively, a cushioning material (outer edge cushioning material) separate from the cushioning material 13 may be used. In the case of disposing the outer edge cushioning material separate from the cushioning material 13, an optimal material for each purpose may be appropriately selected as a material constituting them. When 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. In addition, 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.
なお、 脱落防止部 18 a, 18 bの形態としては、 図 6 (a) に示すような、 外枠体 11の筒端縁又はその近傍において、 外枠体 1 1の中心軸方向に屈曲した ものや、 図 6 (b) に示すような、 外枠体 1 1の中心軸方向に延伸したもの等を 挙げることができる。  In addition, as a form of the falling-off preventing portions 18a and 18b, as shown in FIG. And an outer frame 11 extending in the central axis direction as shown in FIG. 6 (b).
本発明においては、 図 5 (a) 及び図 5 (b) に示すように、 外枠体 11の少 なくとも一方の筒端縁又はその近傍の外周面上にフランジ 12を備えることが好 ましく、 このことにより、 集塵装置等に確実且つ簡便に取り付けることができる 。 なお、 フィルタ保持体を集塵装置等に確実に固定すべく、 フランジ 12にはね じ孔 19等を設けてもよい。  In the present invention, as shown in FIGS. 5 (a) and 5 (b), it is preferable that 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. In addition, this makes it possible to reliably and easily attach the device to a dust collector or the like. In addition, 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.
外枠体 1 1を構成する金属としては、 高温条件下での保持力確保、 経済性等の 観点から、 SUS 430、 S S 400等を挙げることができる。 また、 本発明に おいては、 外枠体の厚さが lmm以下であることが好ましく、 0. 7 mm以下で あることが更に好ましい。 これにより、 作製されるフィルタ保持体が軽量化され るといった効果を奏する。 外枠体の厚さが lmm超であると、 形状加工が困難且 つ重量が増加してしまい、 集塵装置に組み込むに際しての取扱いが困難になるた めに好ましくない。 なお、 本発明においては、 外枠体の厚さの下限値については 特に限定されるものではないが、 実質的な強度を確保する必要性を考慮すると、 0. 3 mm以上であればよい。  Examples of the metal constituting the outer frame 11 include SUS 430, SS 400 and the like from the viewpoints of securing the holding power under high temperature conditions and economical efficiency. Further, in the present invention, 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. In the present invention, 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.
本発明のフィルタ保持体を作製するに際しては、 ハニカムフィルタ 1の外周面 に所定の緩衝材 13、 又はこの緩衝材 13とは別体の外縁部緩衝材 （図示せず） を仮固定し、 一体型の外枠体 1 1の内部に圧入する方法 （図 7) 、 分割型の外枠 体 l l a， l i bを使用し、 これらの間にハニカムフィル夕 1と緩衝材 13、 又 は外縁部緩衝材 （図示せず） とを配した後、 外枠体 11 a， 1 1 bをプレスしつ つこれらの当接箇所を溶接する方法 （図 8) 等を挙げることができる。 ここで、 本発明においては、 外枠体 11及びハニカムフィルタ 1の形状が円筒状であるこ とが好ましく、 これにより、 例えばこれらが角柱状である場合に比して、 図 7に 示すように圧入により容易に作製され得るといった効果を奏する。 即ち、 図 8に 示すように、 分割した外枠体によりハニカムフィル夕 1と緩衝材 1 3挟み込んだ 後、 外枠体 1 1 a， 1 1 bの当接箇所を溶接する操作が不要となり、 容易に製造 され得る。 なお、 図 7における外枠体 1 1のフランジ 1 2や、 脱落防止部 1 8 b は、 圧入後に溶接してもよい。 When manufacturing the filter holding body of the present invention, 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. Press-fitting the inside of the outer frame body 1 (Fig. 7), using the split outer frame bodies lla and lib, between which the honeycomb filler 1 and the cushioning material 13 or the outer edge cushioning material (Not shown), the outer frame bodies 11a and 11b are pressed and the contact points are welded while pressing (FIG. 8). Here, in the present invention, 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. In other words, as shown in Fig. 8, after sandwiching the honeycomb fill 1 and the cushioning material 13 by the divided outer frames, the operation of welding the contact points of the outer frames 11a and 11b becomes unnecessary. It can be easily manufactured. In addition, the flange 12 of the outer frame 11 in FIG. 7 and the falling-off preventing portion 18b may be welded after press-fitting.
次に、 本発明の更に別の側面について説明する。 本発明の更に別の側面は、 集 塵装置に配置されるハニカムフィルタのガス流路の下流側に設置され、 下流側か らハニカムフィルタに圧縮空気を導入することにより、 ハニカムフィルタに捕捉 された捕捉物を除去する逆洗装置であり、 圧縮空気の流路となる円筒状の本流路 管と、 一方の端部が本流路管の側面部に連結するとともに、 ハニカムフィル夕と の接続手段を有する、 一以上の筒状の支流路管と、 本流路管に圧縮空気を導入す るように配設された圧縮空気導入手段とを備えてなることを特徴とするものであ る。 以下、 その詳細について説明する。  Next, another aspect of the present invention will be described. According to still another aspect of the present invention, 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. The details will be described below.
図 9 ( a ) 〜図 9 ( c ) は、 本発明の逆洗装置の一実施形態を示す図面であり 、 図 9 ( a ) は上面、 図 9 ( b ) は正面、 図 9 ( c ) は側面から見た断面図であ る。 本発明の実施形態である逆洗装置 4 0は、 圧縮空気が最初に導入される円筒 状の本流路管 4 1、 この側面部に連結する一以上の筒状の支流路管 4 2、 及び本 流路管 4 1に圧縮空気を導入するように配設された圧縮空気導入手段 （圧縮空気 導入管 9と逆洗バルブ 4 3 ) を備えている。 支流路管 4 2の、 本流路管 4 1に連 結する端部と対向する端部には所定の接続手段が設けられており、 逆洗する対象 物となるハニカムフィルタ 1 (フィル夕保持体 2 0 ) が接続され得るように構成 されている。  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, and 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.
なお、 図 9 ( a ) 〜図 9 ( c ) では、 逆洗装置 4 0及びこれに接続するフィル 夕保持体 2 0が、 集塵装置 8の内部に組み込まれた状態を示している。 本流路管 4 1に連結する圧縮空気導入手段としては、 圧縮空気導入管 9と、 これに圧縮空 気を導入する逆洗バルブ 4 3との組み合わせ等を挙げることができる。 この逆洗 バルブ 4 3を経由して、 集塵装置 8の外部から本流路管 4 1に圧縮空気を導入す るように圧縮空気導入手段を配設して構成すればよい。 例えば、 図 9 ( a ) 〜図 9 ( c ) に示すように、 圧縮空気導入管 9と逆洗バルブ 4 3の各々の中心軸が略 同一となるように所定間隔を隔てた状態でそれぞれを配置し、 集塵装置 8の使用 時には圧縮空気導入管 9の端部と逆洗バルブ 4 3の端部との間から処理済ガスを 系外へと排出するとともに、 逆洗時には逆洗バルブ 4 3から圧縮空気導入管 9の 方向へと圧縮空気を導入可能なように構成すればよい。 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. Examples of 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. For example, 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. Sometimes, 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 | transduced to the inside.
本発明の実施形態である逆洗装置 4 0を構成する本流路管 4 1の形状は円筒状 である。 このため、 図 1 0に示す従来の逆洗装置 4 0に比して、 逆洗の対象物で あるハニカムフィルタ 1の上方空間が狭く、 圧力上昇が速いためこの空間に導入 される圧縮空気が最小限に抑制される。 このため、 ハニカムフィルタ 1が大型で あっても効率的に圧縮空気を導入することができ、 ハニカムフィルタ 1の逆洗を 効果的に実施することができる。 また、 逆洗装置 4 0自体を構成する材料、 例え ば S S 4 0 0等の金属の使用量も最小限であり、 軽量化されている。 従って、 大 型であっても集塵装置 8等への組み込みが容易であるとともに、 組み込みの信頼 性も高いものである。  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.
次に、 本発明の更に別の側面について説明する。 本発明の更に別の側面は、 主 としてダスト等を含む焼却炉排ガスから、 このダスト等を除去するための集塵装 置であり、 ガス流路と、 このガス流路に、 ハニカムフィル夕の一方の筒端面より 被処理排ガスが流入し、 他方の筒端面より処理済ガスが排出するように設置され た、 これまでに述べてきたいずれかのフィルタ保持体と、 このフィルタ保持体に 保持されたハニカムフィルタの、 他方の筒端面に接続され、 ハニカムフィル夕の 逆洗を行う、 前述の逆洗装置とを備えることを特徴とするものである。 以下、 そ の詳細について説明する。  Next, another aspect of the present invention will be described. 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. And 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.
図 1 1は、 本発明の集塵装置の一実施形態を模式的に示す図面である。 本発明 の実施形態である集塵装置 8は、 バ一ナ一 1 5等の加熱 ·焼却手段を備えた焼却 炉 1 6等の被処理排ガスの発生源から、 煙突 1 7等の処理済ガスの放出手段に至 るガス流路を備えており、 このガス流路の途上に、 ハニカムフィル夕の一方の筒 端面より被処理排ガスが流入し、 他方の筒端面より処理済ガスが排出するように フィルタ保持体 1 4が設置されている。  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.
フィルタ保持体 1 4に保持されたハニカムフィル夕の、 処理済ガスが排出され る筒端面には逆洗装置 4 0が接続され、 ハニカムフィル夕の逆洗を行うよう構成 されている。 なお、 逆洗装置 4 0には、 圧縮空気導入管 9及び逆洗バルブを介し て、 集塵装置 8の外部に接続するコンプレッサー （図示せず） 等が接続され、 圧 縮空気を導入するように構成されている。 また、 集塵装置 8の下部には、 逆洗に より除去された捕捉物 （ダスト） を集積するためのダストボックス 6を設置して もよい。 The treated gas from the honeycomb filter held by the filter holder 14 is discharged. 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.
焼却炉において発生した、 ダスト等の微粒子を含む排ガス （被処理排ガス） は 、 集塵装置 8の所定の箇所からその内部へと進入する。 進入した被処理排ガスは 、 フィルタ保持体 1 4の内部に保持されたハニカムフィルタの一方の筒端面より 進入し、 その濾過層にダスト等の微粒子が捕捉される。 濾過層を通過したガス （ 処理済ガス） は、 ハニカムフィル夕の他方の筒端面より排出され、 集塵装置 8、 及び煙突 1 7等の放出手段から、 クリーンなガスとして大気中へと放出される。 これまで述べてきたように、 フィル夕保持体 1 4には、 高温条件下や逆洗応力 が負荷された場合であっても、 その内部にハニカムフィル夕が確実に保持される とともに、 ハニカムフィルタの筒端面の外縁部に割れ、 欠け等の不具合が生じ難 いものである。 また、 逆洗装置 4 0は、 集塵装置 8に用いられるハニカムフィル 夕が大型であっても、 効率的に圧縮空気を導入することができるために、 効果的 に逆洗することが可能であり、 また、 軽量化もなされているために集塵装置 8へ の組み込みの信頼性が高い。  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. You. As described above, even when the filter holder 14 is subjected to a high temperature condition or a backwashing stress, the honeycomb filter is reliably retained inside the filter holder 14 and the honeycomb filter is maintained. 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.
従って、 本発明の集塵装置は、 高い信頼性で大型のハニカムフィルタが組み込 まれているため、 排ガスの処理能力が極めて高いものである。 また、 ハニカムフ ィル夕の効率的な逆洗が可能であるため、 長期間の継続的な使用にも好適な特性 を有するものである。  Therefore, 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. In addition, since the honeycomb filter can be efficiently backwashed, it has characteristics suitable for long-term continuous use.
(実施例）  (Example)
以下、 本発明を実施例により具体的に説明するが、 本発明はこれら実施例に限 定されるものではない。  Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited to these Examples.
(実施例 1 )  (Example 1)
焼成するとコーデイエライトとなる原料混合物 （コーデイエライト化原料混合 物） を用意し、 これに、 水、 及び所定の添加物を添加して、 ニーダーを用いて混 合した後、 土練機を用いて土練することにより、 成形用の坏土を得た。 得られた 坏土を、 縦押出機を使用して所定の受缶内に円筒状のハニカム形状に押し出すこ とにより成形体を得た。 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.
次いで、 縦置きのまま受缶の底部の網板を介して、 成形体の下方から上方へと 1 3 0 °Cの熱風を 3時間通風して乾燥することにより乾燥体を得た。 得られた乾 燥体を、 コーデイエライト粉砕物を主成分とする目封じ材を用いて図 1及び図 2 に示すように目封じ部 1 0を形成した後、 縦置きのまま 1 3 5 0〜 1 4 5 0 °C、 2時間焼成することにより、 焼成体を得た。  Next, 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. After forming the plugged portion 10 as shown in FIGS. 1 and 2 using a plugging material containing cordierite pulverized material as a main component, the obtained dried product was placed vertically in place. By firing at 0 to 450 ° C. for 2 hours, a fired body was obtained.
この焼成体の隔壁の表面上に、 図 3に示す処理装置 3 0 用いてセラミックス 粒子からなる層を形成した後、 縦置きのまま 1 3 5 0〜 1 4 5 0 °C、 1時間焼成 することにより、 円筒状のハニカムフィルタを得た。  After a layer made of ceramic particles is formed on the surface of the partition wall of this fired body using the processing apparatus 30 shown in FIG. 3, firing is performed at 135 ° C. to 144 ° C. for 1 hour in a vertical position. Thus, a cylindrical honeycomb filter was obtained.
(評価）  (Evaluation)
得られたハニカムフィルタの全長は 7 0 0 mm、 外径 （最大外寸） は 2 5 0 m πι φ、 濾過面積は 8 m2、 平均気孔径 （水銀圧入法にて測定） は 1 5 ^ m、 気孔 率 （J I S R 2 2 0 5に準拠） は 4 0 %、 セルピッチは 6 mm、 及び隔壁の厚 さは l mmであった。 また、 目視評価したところ、 セルや、 ハニカムフィルタの 全体に、 変形やつぶれ等の不具合の発生を確認することはできなかった。 産業上の利用可能性 The total length of the obtained honeycomb filter is 700 mm, the outer diameter (maximum outer dimension) is 250 m πιφ, 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
以上説明したように、 本発明のハニカムフィルタは、 その一方の開口端面から 他方の開口端面までの長さ、 開口端面の最大外寸、 及び濾過面積が所定の数値範 囲である、 いわゆる大型のハニカムフィルタであるため、 排ガスの処理能力が大 きく、 主として集塵装置用のフィルタとして好適な特性を有する。  As described above, 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.
また、 本発明の八二カムフィルタの製造方法によれば、 成形用坏土を、 重力方 向に押し出してハニカム形状の成形体を形成するとともに、 所定の受缶内に収納 し、 この受缶内に収納した状態で乾燥、 及び焼成するため、 大型でありながらも セルやその全体に、 変形やつぶれ等の不具合を生ずることなく、 八二カムフィル 夕を製造することができる。  Further, according to the manufacturing method of the 82-cam filter of the present invention, 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.
更に、 本発明のフィルタ保持体は、 ハニカムフィルタと外枠体との間に緩衝材 を備え、 緩衝材が圧縮された状態で、 外枠体の内部にハニカムフィル夕が保持さ れてなるとともに、 外枠体の所定の箇所に、 緩衝材を介したハニカムフィルタの 脱落防止部を備えるものであるため、 外枠体への保持に信頼性を有し、 取扱い容 易性にも優れている。 - 一方、 本発明の逆洗装置は、 円筒状の本流路管と、 この本流路管の側面部に連 結するとともに、 ハニカムフィル夕との接続手段を有する筒状の支流路管と、 本 流路管に連結する圧縮空気導入手段とを備えてなるものであるため、 軽量であり 、 かつ、 支流路管に接続されたハニカムフィルタの逆洗を効率的に実施すること ができる。 Further, 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. -On the other hand, 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.
また、 本発明の集塵装置によれば、 ガス流路と、 このガス流路に、 所定状態で 設置された所定のフィルタ保持体と、 このフィル夕保持体に保持されたハニカム フィルタに接続され、 このハニカムフィル夕の逆洗を行う所定の逆洗装置とを備 えるものであるため、 処理能力が極めて高く、 信頼性に優れた集塵装置であると ともに、 八二カムフィルタの効率的な逆洗が可能であるため、 長期間の継続的な 使用にも好適な特性を有するものである。  Further, according to the dust collector of the present invention, 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.

Claims

請 求 の 範 囲 The scope of the claims
1 . 多孔質構造を有する隔壁によってハニカム形状に仕切られた、 流体の流路 となる複数のセルを備え、 所定の前記セルの一方のセル開口部と、 残余の前記セ ルの他方のセル開口部に交互に形成された目封じ部により、 前記隔壁が濾過層と して機能する、 セラミックスからなる筒状のハニカムフィル夕であって、 その一方の筒端面から他方の筒端面までの長さが 5 0 0〜1 0 0 0 mm、 前記 筒端面の最大外寸が 2 0 0〜3 5 0 mm, 及び前記濾過層の濾過面積が 4 m2以 上であることを特徴とするハニカムフィルタ。 1. A plurality of cells which are partitioned into a honeycomb 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 other cell opening of the remaining cells are provided. A cylindrical honeycomb filter made of ceramics, wherein the partition walls function as a filtration layer by plugging portions alternately formed in the portion, and a length from one end face of the cylinder to the other end face of the cylinder. Wherein the maximum outer dimension of the cylindrical end face is 200 to 350 mm, and the filtration area of the filtration layer is 4 m 2 or more. .
2 . 前記セラミックスが、 コーディエライトである請求項 1に記載のハニカム フィルタ。  2. The honeycomb filter according to claim 1, wherein the ceramic is cordierite.
3 . 前記隔壁の少なくとも一方の表面上に、 一又は二層以上のフィル夕層を備 える請求項 1又は 2に記載のハニカムフィルタ。  3. The honeycomb filter according to claim 1 or 2, further comprising one or more filter layers on at least one surface of the partition wall.
4 . セラミックス原料を含む原料混合物からなる成形用坏土を、 重力方向に押 し出して、 隔壁によって仕切られた流体の流路となる複数のセルを備えたハニカ ム形状の成形体を形成するとともに、 押出し方向に配置した網目状の底部を備え た受缶内に収納し、  4. Extrude the forming clay consisting of the raw material mixture containing the ceramic raw material in the direction of gravity to form a honeycomb-shaped formed body having a plurality of cells serving as fluid passages partitioned by the partition walls. At the same time, it is stored in a can with a mesh bottom arranged in the extrusion direction,
前記成形体を前記受缶内に収納した状態で、 複数の前記セルに通風することに より前記成形体を乾燥して乾燥体を得、  In a state where the molded body is housed in the can, the molded body is dried by ventilating the plurality of cells to obtain a dried body,
前記乾燥体の所定の前記セルの一方のセル開口部と、 残余の前記セルの他方の セル開口部に目封じ材を圧入した後、 焼成することにより、 前記隔壁が濾過層と して機能するハニカムフィルタを得ることを特徴とするハニカムフィルタの製造 方法。  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 method for manufacturing a honeycomb filter, comprising obtaining a honeycomb filter.
5 . 請求項 1〜3のいずれか一項に記載のハニカムフィルタの外周面と、 金属 からなる筒状の外枠体の内周面との間に緩衝材を備え、 前記緩衝材が圧縮された 状態で、 前記外枠体の内部に前記ハニカムフィルタが保持されてなるとともに、 前記外枠体の、 少なくとも一方の筒端縁又はその近俦に、 前記外枠体の中心軸 方向に延伸又は屈曲する、 前記ハニカムフィルタの脱落防止部を備え、 かつ、 前 記脱落防止部と、 前記ハニカムフィル夕の少なくとも一方の前記筒端面の外縁部 との間に、 前記緩衝材又は前記緩衝材とは別体の外縁部緩衝材を備えることを特 徴とするフィルタ保持体。 5. A cushioning material is provided between an outer peripheral surface of the honeycomb filter according to any one of claims 1 to 3 and an inner peripheral surface of a cylindrical outer frame body made of metal, wherein the cushioning material is compressed. In this state, the honeycomb filter is held inside the outer frame body, and the outer frame body extends or extends in the central axis direction of the outer frame body at least at one end of the cylinder or in the vicinity thereof. The honeycomb filter is provided with a falling-off preventing portion of the honeycomb filter, and the cushioning material or the cushioning material is provided between the falling-off preventing portion and an outer edge portion of at least one of the cylindrical end surfaces of the honeycomb filter. It is characterized by having a separate outer edge cushioning material. Filter holder to be featured.
6 . 前記外枠体の、 少なくとも一方の筒端縁又はその近傍の外周面上にフラン ジを備える請求項 5に記載のフィルタ保持体。  6. The filter holder according to claim 5, wherein a flange is provided on at least one of the cylindrical edges of the outer frame or on the outer peripheral surface in the vicinity thereof.
7 . 前記外枠体の厚さが、 1 mm以下である請求項 5又は 6に記載のフィルタ 保持体。  7. The filter holder according to claim 5, wherein the outer frame has a thickness of 1 mm or less.
8 . 前記外枠体及び前記ハニカムフィルタの形状が、 円筒状である請求項 5〜 7のいずれか一項に記載のフィルタ保持体。  8. The filter holder according to any one of claims 5 to 7, wherein the outer frame body and the honeycomb filter have a cylindrical shape.
9 . 集塵装置に配置されるハニカムフィル夕のガス流路の下流側に設置され、 前記下流側から前記ハニカムフィルタに圧縮空気を導入することにより、 前記ハ 二カムフィル夕に捕捉された捕捉物を除去する逆洗装置であつて、  9. The honeycomb filter is installed on the downstream side of the gas flow path of the honeycomb filter arranged in the dust collector, and the trapped matter captured by the honeycomb filter is introduced by introducing compressed air from the downstream side to the honeycomb filter. Backwashing device to remove
前記圧縮空気の流路となる円筒状の本流路管と、 一方の端部が前記本流路管の 側面部に連結するとともに、 前記ハニカムフィル夕との接続手段を有する、 ー以 上の筒状の支流路管と、 前記本流路管に圧縮空気を導入するように配設された圧 縮空気導入手段とを備えてなることを特徴とする逆洗装置。  A cylindrical main flow pipe serving as a flow path of the compressed air; and one end connected to a side surface of the main flow pipe and connecting means for connecting to the honeycomb filter. And a compressed air introducing means arranged to introduce compressed air into the main channel pipe.
1 0 . ガス流路と、 前記ガス流路に、 前記八二カムフィルタの一方の前記筒端 面より被処理排ガスが流入し、 他方の前記筒端面より処理済ガスが排出するよう に設置された請求項 5〜 8のいずれか一項に記載のフィルタ保持体と、 前記フィ ル夕保持体に保持された前記ハニカムフィル夕の、 他方の前記筒端面に接続され 、 前記ハニカムフィルタの逆洗を行う請求項 9に記載の逆洗装置とを備えること を特徴とする集塵装置。  10. The gas flow path and the gas flow path are installed such that the exhaust gas to be treated flows into one of the cylinder end faces of the 82-cam filter and the treated gas is discharged from the other cylinder end face. The filter holder according to any one of claims 5 to 8, wherein the honeycomb filter held by the filter holder is connected to the other end of the cylinder, and the honeycomb filter is backwashed. A dust collector, comprising: the backwash device according to claim 9 for performing the following.
PCT/JP2003/006458 2002-05-24 2003-05-23 Honeycomb filter and method of manufacturing the honeycomb filter, filter holder, backwashing device, and dust collector WO2003099416A1 (en)

Priority Applications (2)

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JP2004506936A JP4685444B2 (en) 2002-05-24 2003-05-23 Manufacturing method of honeycomb filter
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JP2007229564A (en) * 2006-02-28 2007-09-13 Ngk Insulators Ltd Manufacturing method of ceramic filter
JP2010234341A (en) * 2009-03-31 2010-10-21 Ngk Insulators Ltd Method for manufacturing honeycomb structure
JP2014014795A (en) * 2012-07-11 2014-01-30 Metawater Co Ltd Ceramic filter and ceramic filter dust collector

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JP2014014795A (en) * 2012-07-11 2014-01-30 Metawater Co Ltd Ceramic filter and ceramic filter dust collector

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AU2003242426A1 (en) 2003-12-12

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