JP3410627B2 - Dust collection unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting unit using a ceramic element used for collecting dust of high temperature dust-containing gas such as combustion gas discharged from an iron making plant, a cement plant, various chemical plants and the like. It is a thing. In particular, the present invention relates to the structure of the seat of the mounting container that comes into contact with the flange of the ceramic element of the dust collecting unit.

[0002]

2. Description of the Related Art As a conventional dust-collecting unit for dust-containing gas, there is, for example, JP-A-8-47613.
The ceramic element used here is made of mullite porcelain or cordierite porcelain, and as shown in FIGS. 11 and 12, the ceramic element (1), which is a ceramic filter element, filters dust-containing gas. It comprises a filter part (4) and a flange part (5) provided on the outer peripheral end thereof. In the filter part (4), the front part on the upstream side is opened, and the dust-containing gas inlet (2), which is an opening in which the end part of the rear part on the downstream side is plugged, and the rear part on the downstream side are opened. In addition, a clean gas outlet (3), which is an opening whose front end on the upstream side is plugged, is alternately provided, forming a honeycomb structure. At the time of filtration, the dust-containing gas supplied from the dust-containing gas inlet (2) side of the filter part (4) is discharged from the clean gas outlet (3), and the dust in the dust-containing gas is captured. At the time of backwashing, the backwash gas supplied from the clean gas outlet (3) side of the filter part (4) is discharged from the dust-containing gas inlet (2), and the captured dust is treated as dust-containing backwash gas. Emitted from (4).

As shown in FIGS. 13 and 14, a conventional dust collecting unit (115) used in a dust collecting apparatus has a plurality of square cylindrical walls arranged vertically and horizontally to form a single mounting container ( 112) is formed, and a flange (118) having a screw hole is provided on the outer periphery of the wall of the mounting container (112). As shown in FIG. 15, the mounting container (11
The outer peripheral surface of the annular seat (107) is welded to the inner peripheral surface of the wall (109) of 2), and the contact surface of the seat (107) that abuts the collar portion (105) of the ceramic element is , Wall (109
) Is almost vertical to the wall surface. Seat (107)
The wall (109) of the mounting container (112) on the front side is provided with a hole, and the arm (108) is inserted into the hole, and the fixture (111) is screwed into the arm (108). An annular seat (107) welded from the front side to the square tubular wall of the mounting container (112)
A ceramic element (1) having a collar portion is inserted into the ring of the collar, a holding plate (110) is placed on the collar portion, and the holding plate (110) is screwed and fixed to the arm member (109). When a fixture (111) such as a bolt is tightened, it is airtightly fixed to the seat (107) of the flange (5) of the ceramic element. A heat resistant packing (117) made of ceramic or metal is provided between the seat (107) and the collar portion (5), and between the collar portion (5) and the holding plate (110). Also, mounting container (112)
A packing (117) is further provided between the ceramic element (1) and the ceramic element (1) to prevent the leakage of dust-containing gas. Here, the seat (107), wall (109) and arm (108) of the mounting container (112) of the conventional dust collection unit (115).
), The holding plate (110), and the fixture (111) are all made of the same iron.

The conventional dust collecting unit (115) has an annular seat (107) on the inner circumference of a square cylindrical wall of the mounting container (112).
Weld the outer periphery of the seat, but since it is difficult to work, the seat (107)
The welded part of the bulge largely protrudes from the contact surface of the seat (107) that comes into contact with the flange (5), or burrs are attached to form irregularities or protrusions, and contact the flange (105). Seat (10
Often, part of the contact surface in 7) was not flat.
When the flange part (105) of the ceramic element is pressed and fixed to the contact surface of such a seat (107), stress is applied to the flange part (105) of the ceramic element due to the protrusion and the projections and depressions caused by the adhesion of burrs. As a result, the flange part (105) of the ceramic element was damaged, and the dust-containing gas leaked from there. In order to avoid the damage of the ceramic element (1) as described above, if the tightening force of the fixture when fixing the seat (107) and the flange portion (105) of the ceramic element is reduced, a gap is created between them. The dust-containing gas leaked from there, which was a problem. Mounting container (11
The weld between the wall of 2) and the seat (107) should be fixed to the flange (105) of the ceramic element, avoiding protrusion and reduction of the contact surface. If the seat (107) is lengthened by that amount and a flat abutment surface is provided, the size of the seat (107) increases and the mounting container (11
2) The number of ceramic elements (1) installed per volume is reduced. Therefore, in order to secure the dust collection performance required for dust collection of a predetermined dust-containing gas, the number of dust collection units (115) increases and the size of the dust collection device (120) increases. It was not desirable. It is also conceivable to remove the protrusion, unevenness, and protrusions due to welding by polishing, and to polish the surface of the seat (107) welded inside the mounting container (112) to make it flat. The polishing work of the annular seat fixed to the inner peripheral surface of the wall of the (115) mounting container is extremely difficult to perform, and thus requires a large number of man-hours.

In the conventional dust collector (120), as shown in FIG. 16, the dust-containing gas supply port (12) provided on the upper part of the can body (124).
1) Transport the dust collection unit (115) into the can body (124) through the other carry-in port, and divide the partition wall (12) of the can body (124).
It is fixed to 5) with a flange (118). The flange (118) provided on the outer peripheral edge of the inner frame (112) of the dust collection unit (115) is attached to the partition wall (125) of the can body (124).
Airtightly fixed by on-site construction to clean gas section (128)
Need to be formed. The partition wall (125) inside the can body (124) is attached to the flange (11) of the dust collection unit (115).
7) is fixed with a large number of screws (119) because the length of the sealing surface on the outer peripheral portion of the flange (118) is long. Moreover, a large space was required between the dust collection unit (115) fixed to the partition wall (125) and the adjacent dust collection unit (115).

As shown in FIG. 16, the conventional dust collecting device (120) using the dust collecting unit (115) has a dust-containing gas supply port (121) in the upper part of the can body (124) and dust in the lower part. Outlet (12
3) is provided, and the inside thereof is partitioned by a partition wall (125) into a dust-containing gas portion (122) located in the central portion and a clean gas portion (128) located in the outer peripheral portion thereof. A dust-containing gas supply port (121) is provided above the dust-containing gas portion (122) formed in the center of the can body (124).
The dust-containing gas supply port (121) is connected to a dust-containing gas supply source (not shown) via a dust-containing gas supply pipe, and the can body (124)
A dust discharge port (123) is provided in the lower part of the, and is connected to a dust discharge device (not shown) via a dust discharge pipe.
The clean gas portion (128) of the can body (124) is provided with a clean gas discharge port (113), is connected to a clean gas discharge device (not shown) through a clean gas discharge pipe, and is further provided with a backwash gas supply port. (114) is provided and is connected to a backwash gas supply device (not shown) via a backwash gas supply pipe. Partition wall (125
) Is provided with a plurality of holes for inserting the dust collecting unit (115), and the flange (118) at the outer peripheral end of the dust collecting unit (115) is provided in the hole and the partition wall (125). It is airtightly fixed to the can body (124) by a number of screws (119).
) And the partition wall (125), a clean gas portion (128) is formed. A dust collection unit (115) is installed on the partition wall (125) in the can body (124) to form a dust collector. For example, the dust-containing gas supply port (121) at the top of the can body (124) and other carry-in From the mouth, after suspending the dust collection unit (115) in the can body (124), insert it into the hole provided in the partition wall (125) inside the can body, and collect the dust by performing on-site construction in the can body. A flange (118) on the outer edge of the inner frame (112) of the unit (115)
) On the partition wall (125) of the can body (124) and packing (1
17) and fix it airtightly with screws.

Mounting container (112) for the dust collecting unit (115)
The flange (5) of the ceramic element is airtightly fixed between the seat (107) and the arm (108), but since it is open without an enclosure at the rear, it serves as a dust collector (120). The flange (118) of the mounting container (112) of the dust collection unit (115) is used to form the clean gas part, which is a closed space.
It was necessary to hermetically fix the above to the partition wall (125) of the can body (124) having a closed space.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the leakage of dust-containing gas between the wall of the mounting container of the dust collecting unit used in the dust collector and the flange of the ceramic element. To do.

[0009]

A first aspect of the present invention for solving such a problem is to provide a mounting container having a cylindrical wall and a seat on the inner peripheral surface of the wall of the mounting container. An annular seat to which the outer peripheral surface of the seat is fixed, a ceramic element having a collar portion inserted from the front side into the ring of the seat, and a mounting located on the front side of the receiving seat fixed to the mounting container. It is composed of arms inserted into holes provided in the wall of the container, and a fixture for fixing the flange portion to the receiving seat, and by tightening the fixing device from the front side, the flange portion is formed into the receiving seat. A dust collection unit which is airtightly fixed to the above, wherein the contact surface that comes into contact with the flange is made flat over the entire surface. A second aspect of the invention is a box-shaped mounting container, an annular receiving seat fixed around a mounting hole provided in a wall of the mounting container, and a collar portion inserted from the front side into the ring of the receiving seat. A ceramic element having an opening, a support wall standing upright on the mounting container at a predetermined distance from the seat, an arm bar fitted in a hole provided in the support wall, and the collar part. It consists of a fixture for fixing to the seat,
A dust collecting unit in which the collar portion is airtightly fixed to the receiving seat by tightening the fixing tool from the front side, and an abutting surface that abuts the collar portion is made flat over the entire surface. It is a dust collecting unit.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the dust collecting unit (15) of the first embodiment of the present invention, as shown in FIG. 1, a flat member (27) having a flat surface on a seat (7) is welded, Since it is fixed by a fixing method such as fitting or screwing, the flange portion (5) of the ceramic element comes into contact with the flat surface of the flat member (27). As shown in FIGS. 2 to 5, the shape of the flat member (27) fixed to the seat (7) and in contact with the flange (5) is flat, L-shaped, U-shaped, and cross-sectional. There are various shapes such as Y-shape. Also, the fixing method is welding, fitting,
There are screwing, screwing, etc., and these may be combined appropriately. FIG. 2 shows that the flat plate-shaped flat member (27) is fixed to the contact surface side of the flange (5) of the seat (7), and the thickness of the flat plate-shaped flat member (27) is increased. Weld the sides and rear of the seat (7) to the wall of the mounting container (12), and measure the height of the weld from the surface of the seat to the flat surface of the flat member (27) from the surface of the seat. It is preferable that the height is less than or equal to the height. Since the height of the welded portion between the wall (9) and the seat (7) is high, the welded portion between the seat (7) and the wall (9) is large on the contact surface of the seat (7). There is no case where the contact surface of the receiving seat (7) contacting the flange portion (5) is partially flat because protrusions or burrs adhere to form irregularities or protrusions. In FIG. 3, a flat member (27) having an L-shaped cross section is fixed to the contact surface of the seat (7), and it is also possible to fix the flat member (27) from the side surface of the seat (7) with a screw (19). 4 shows a flat member (27) having a U-shaped cross section fixed to the contact surface of the seat (7) with a screw, and FIG. 5 shows a cross section of the flat surface (27) of the contact surface of the seat (7). The U-shaped flat member (27) is fitted and fixed. When the flat member (27) is apt to be distorted or deformed by welding due to its material and wall thickness, or when the flat member (27) is desired to be attached / detached, the flat member (27) is contacted with the flange portion (5). A recess is formed in a part of the contact surface to fix the surface of the seat (7) with a screw, or to the side of the seat (7) with a screw. As described above, in order to fix the flat member (27) to the contact surface of the seat (7), conventional means such as welding, bonding, screwing, fitting, screwing, etc. can be used.
Due to the above measures, the wall (109) of the conventional mounting container (112)
When the annular seat (107) fixed to (1) is welded from the flange side, the problem that the R portion, which is the welded portion, protrudes into the contact surface and the contact surface is not flat is solved.

A second embodiment of the dust collecting unit (1
As shown in FIG. 6, 5) is a substantially rectangular parallelepiped mounting container (12) surrounded by a wall (9), and a mounting hole provided in the front wall (9) of the mounting container (12). An annular seat (7) is fixed around the periphery (16). A flat member (27) is fixed to the seat (7), and the ceramic element (1) is inserted into the mounting hole (16). The armrest (8) inserted into the hole of the support wall (6) provided upright on the front part of the wall (9) of the mounting container (12), and the seat (7) to which the flat member (27) is fixed. Between the bolts, with a heat-resistant packing (17) made of ceramic or metal and a square annular holding plate (10) between them.
The ceramic element (1) having the same flange as the conventional one is airtightly fixed by a fixing tool (11) such as a screw. The ceramic element (1) having a flange is hermetically fixed to a mounting hole (16) provided in a front wall (9) of the mounting container (12) of the dust collecting unit (15), and the mounting container (12) is attached. A clean gas outlet (1) for discharging clean gas to the rear wall (9)
3) and backwash gas supply port for supplying backwash gas (14)
Is installed, and when the clean gas discharge pipe (13) and the backwash gas supply pipe are airtightly connected to the backwash gas supply port (14), the clean gas discharge pipe is closed inside the mounting container (12). A clean gas portion that is a space is formed.

The shape and the fixing method of the flat member (27) are the same as those in the first embodiment, and the flat member fixed to the contact surface of the receiving seat (7) which contacts the collar portion (5). As the shape of (27), as shown in FIGS.
There are various shapes such as U-shaped cross section. FIG. 7 shows a case in which a flat plate-shaped flat member (27) is fixed to the contact surface of the seat (7), and the flat plate-shaped flat member (27) is attached to the side or rear portion of the seat (7). When welding to the wall of (12) and welding to the front, make the height of the weld from the surface of the seat to be less than the height from the surface of the seat to the flat surface of the flat member (27). It is necessary to. FIG. 8 shows a flat member (2
7) is fitted and fixed, and in FIG. 9, a flat member (27) having an L-shaped cross section is fixed to the contact surface of the seat (7). Depending on the material and thickness of the flat member (27), distortion or deformation is likely to occur when welding, or the flat member (2
When it is desired to attach / detach 7), a recess is formed in a part of the contact surface of the flat member (27) with the flange portion (5) to fix the surface of the seat (7) with a screw, or the seat (7). Screw on the side of the. Further, the seat (7) and the flat member (27) may be fitted together and further fixed by screws or pins. As shown in FIG. 7, a flat member (27) is fixed to the catch seat (7) of the dust collecting unit (15) of the second embodiment of the present invention so as to come into contact with the flange portion (5). The contact surface is formed. There are various flat member (27) shapes and fixing methods as in the first embodiment. Although the first embodiment and the second embodiment differ in the structure of the mounting container (12), the flat member (27) is fixed to the receiving seat (7) to flatten the contact surface with the flange portion. They have the same technical idea with respect to the point. In the second embodiment, since the seat (7) is fixed to the surface of the mounting container (12), after properly fixing the member to the surface of the seat (7), the surface is ground with a milling machine. The contact surface of the flat member (27) can be made flat. In short, it is sufficient that the contact surface of the wall (9) of the mounting container that contacts the flange portion (5) of the ceramic element is flat, and this surface may be ground with a milling machine. In addition,
In the first and second embodiments, the seat (7) is provided on the wall (9) of the mounting container, but the wall (9) of the mounting container is directly ground, and the flange portion (5) of the ceramic element is formed. ), The seat (7) can be omitted if the contact surface with () can be made flat.

As shown in FIG. 10, in the dust collecting apparatus (1) using the dust collecting unit of the second embodiment, a substantially rectangular parallelepiped dust collecting unit (15) is lifted from above by a crane or the like to collect dust. The bottom dust collecting unit (15) is placed on the base (31) in the can body (24) with the wall of the dust unit (15) to which the ceramic element (1) is fixed facing in a certain direction. After that, the same dust collecting units (15) are sequentially formed on top of each other. Connect the dust-containing gas supply pipe (21) to the dust-containing gas supply port (21) of the can body (24) and the dust discharge pipe to the dust discharge port (23),
The can body (24) is penetrated and airtightly fixed to the can body (24), and further, the clean gas discharge port (1) of the dust collection unit (15).
It is possible to connect the clean gas discharge pipe to 3) and the backwash gas supply pipe to the backwash gas supply port (14) in an airtight manner so that the can body (24) penetrates and is also hermetically fixed to the can body (24). is necessary. Since the dust collecting unit of the second embodiment uses a box-shaped mounting container, the dust collecting unit (15) may be installed in the can body (24), and thus the number of construction steps can be reduced. Unlike the conventional dust collecting unit, the dust-containing gas does not leak between the flange and the partition wall, so that the number of man-hours required for installing the apparatus can be reduced. In the dust collecting device (20) using the dust collecting unit (15) of the second embodiment, since the seat provided on the wall of the box-shaped mounting container is located on the surface, it is fixed to the seat by the milling machine. A flat surface can be obtained by polishing the formed flat member, which is preferable.

[0014]

In the dust collecting unit of the present invention, since the flat member is fixed to the seat so that the contact surface of the seat that comes into contact with the flange of the ceramic element becomes flat over the entire surface, There is no damage to the ceramic element due to stress concentration or bending stress. In the dust collecting unit of the present invention, the contact surface of the flat member is flat and can be more airtightly fixed to the flange portion of the ceramic element, so that the leakage of dust-containing gas from this portion can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of a dust collecting unit of the present invention.

FIG. 2 is a detailed view of the mounting structure of the seat according to the first embodiment of the present invention.

FIG. 3 is a detailed view of a mounting structure for a seat according to the first embodiment of the present invention.

FIG. 4 is a detailed view of the mounting structure for the seat according to the first embodiment of the present invention.

FIG. 5 is a detailed view of a mounting structure for a seat according to the first embodiment of the present invention.

FIG. 6 is a vertical sectional view of a second embodiment of the dust collecting unit of the present invention.

FIG. 7 is a detailed view of the mounting structure for the seat according to the second embodiment of the present invention.

FIG. 8 is a detailed view of the mounting structure for the seat of the second embodiment of the present invention.

FIG. 9 is a detailed view of a mounting structure for a seat according to a second embodiment of the present invention.

FIG. 10 is a vertical sectional view of a dust collecting apparatus using the dust collecting unit of the present invention.

FIG. 11 is a perspective view of a ceramic element.

FIG. 12 is a vertical sectional view of a ceramic element.

FIG. 13 is a front view of a conventional dust collection unit.

FIG. 14 is a vertical sectional view of a conventional dust collection unit.

FIG. 15 is an enlarged vertical sectional view of a conventional dust collecting unit.

FIG. 16 is a vertical cross-sectional view of a conventional dust collector.

[Explanation of symbols]

1 Ceramic element 2 Dust-containing gas inlet 3 Clean gas outlet 4 Ceramic element filter 5 Ceramic element collar 6 Mounting container support wall 7 Mounting container seat 8 Mounting container arms 9 Wall of mounting container 10 Presser plate 11 Fixture 12 Mounting container 13 Clean gas outlet 14 Backwash gas supply port 15 Dust collection unit 16 mounting holes 17 Packing 18 flange 19 screw 20 Dust collector 21 Dust-containing gas supply port 22 Dust-containing gas part 23 Dust outlet 24 cans 25 partitions 26 compartment wall 27 Flat member 28 Clean gas section 29 Mounting container door 30 sealing material 31 base 107 Conventional mounting container seat 108〃 Arm of mounting container 109〃 Mounting container wall 110〃 Holding plate 111〃 Fixture 112〃 Mounting container 113〃 Clean gas outlet 114〃 Backwash gas supply port 115〃 Dust collection unit 106〃 Mounting hole 117〃 packing 118〃 flange 119 〃 screw 120〃 dust collector 121〃Dust-containing gas supply port 122〃 Dust-containing gas part 123 Dust outlet 124 〃 can 125〃 can partition wall 127〃 Support material 128〃 Clean gas section

Continuation of the front page (56) Reference JP-A-10-249125 (JP, A) JP-A-10-192629 (JP, A) JP-A-8-47613 (JP, A) JP-A-7-136438 (JP , A) JP-A-63-22225 (JP, A) Actual Kaihei 1-170420 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 46/00 B01D 46/42

Claims (2)

(57) [Claims] 1. A mounting container having a cylindrical wall, an annular receiving seat to which an outer peripheral surface of the receiving seat is fixed to an inner peripheral surface of the wall of the mounting container, and a front side inside the receiving seat ring. A ceramic element having a collar portion to be inserted, a arm member fitted into a hole provided in a wall of the mounting container located in front of the seat fixed to the mounting container, and the arm member fixed to the arm member. A dust collecting unit comprising a fixture for fixing the collar part to the receiving seat, and the fastening part is airtightly fixed to the receiving seat by tightening the fixing device from the front side. A dust collection unit characterized in that the contact surface that comes into contact with the portion is made flat over the entire surface. 2. A box-shaped mounting container, an annular receiving seat fixed around a mounting hole formed in a wall of the mounting container, and a collar portion inserted from the front side into the receiving seat ring. The ceramic element, the support wall that is provided upright on the mounting container at a predetermined distance from the seat, the arm fitted into the hole provided in the support wall, and the collar portion that receives the seat. A dust collecting unit that is airtightly fixed to the pedestal by tightening the fixing member from the front side, and is a contacting member that comes into contact with the flange portion. A dust collection unit that has a flat surface.