JPH07732A - Dust collector - Google Patents

Abstract

PURPOSE:To install so that elongation difference due to thermal expansion of a honeycomb filter part fitted to a can body may be absorbed and also to provide structure that makes maintenance and inspection easy, with respect to the dust collectors for high temp. dust contg. gas discharged from combustion equipment using fossil fuel, such as coal, steel manufacturing machines, cement machines and chemical plants. CONSTITUTION:The 1st honeycomb filter part 4 is in the upper part of a can body 1, and a honeycomb packs 10 are arranged on both sides of a dust contg. gas duct 11. A part of dust contg. gas is taken out of a clean gas outlet through a clean gas duct 12. The remaining gas is collected in a dust hopper 3 from the 2nd filter part 5 and taken out. The honeycomb filter part 4 is supported on a honeycomb pack support bean 13, which is supported freely slidably on a pack support beam cradle 14. Since the support beam 13 is hollow and makes the right and left clean gas ducts 12 communicate with each other and conducts clean gas to a clean gas outlet 6, elongation difference between the support beam 13 and the can body 1 due to thermal expansion is absorbed and a space for maintenance and inspection also is secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust remover applied to high temperature dust-containing gas discharged from combustion equipment using fossil fuel such as coal, iron making machines, cement production equipment, chemical plants and the like.

[0002]

2. Description of the Related Art A dust remover for removing dust in high temperature gas using a honeycomb type filter element made of a porous ceramic body has recently attracted attention. The supporting method of (1) is divided into several types in consideration of the method of taking out clean gas after filtration.

That is, in the case where the dust removing device is only the honeycomb type filter portion, it is the same as that it is received by the supporting metal finally welded to the can body, but the supporting method is the arch brick method or the usual method. The metal support beam method is adopted. In this case, the dust-containing gas is partitioned by a duct in the can, and the filtered clean gas flows through the other parts of the can and is taken out from one clean gas outlet.

The example shown in FIG. 6 is not limited to the above-mentioned honeycomb type filter section, but a cylindrical type filter section (second filter section) composed of a honeycomb filter section (first filter section 04) and a large number of cylindrical elements 024. 05),
This is an example consisting of the dust hopper 03, and as shown in the EE arrow view of FIG. 7, partition plates 021 are provided on the upper and lower parts of the first filter part 04, and the dust-containing gas duct 011 is arranged in the center of the plane. The filter is a dust-containing gas inlet 02
A part of the dust-containing gas FG flowing from the center is filtered to form a space surrounded by the upper and lower partition plates 021, the can body 01, and the honeycomb pack 010 as a filter as a clean gas chamber 022. Take-out 02
After passing through 3, the clean gas G is extracted to the outside. In this case, the support of all the filter parts including the load of the dust-containing gas duct is performed by the upper and lower partition plates 021.

[0005]

When the dust removing device is composed only of the honeycomb filter portion, the supporting method is relatively simple because it is integrated in the can body, and there is no particular problem in taking out clean gas. However, in the case shown in Fig. 6,
Since the partition plate 021 is used as the support system, there is a problem of processing the difference between the thermal expansion of the dust-containing gas duct 011 and the mounting frame of the honeycomb pack 010 due to the high temperature gas and the expansion of the can body 01, and the partition plate 021 and the can body. There was a problem of sealing for preventing dust leak from the dust-containing gas side to the clean gas side between No. 01 and No. 01. Further, improvement in maintenance and inspection in a limited space inside the can body 01 has also been a problem.

In order to solve these problems, the present invention has devised a mounting portion of a honeycomb filter portion, and
Also in terms of maintainability, it was made with the aim of improving the space by securing a space.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a filter part for cleaning a part of dust-containing gas to the outside of a can body through a honeycomb filter part on the upper part and a cylindrical part on the lower part. In a dust remover in which a mold filter and a dust hopper are arranged almost vertically, a honeycomb filter part has a central part as a dust-containing gas passage, and a single stage of a honeycomb pack composed of a plurality of filter elements arranged to face each other. A structure having a plurality of stages and a clean gas duct at the back of the honeycomb filter part to which these are mounted, a support beam supporting these and a pipe for taking clean gas to the outlet outside the can body, and a dust-containing gas duct facing the central honeycomb By introducing it to a clean gas duct provided on each outside of the filter part, and using a beam with a hollow interior as the support beam, It communicates the honeycomb filter portions facing Te is obtained by the configuration taken out gas from the outlet on one side of the clean gas ducts clean gas into the can body.

That is, according to the first aspect of the invention, the honeycomb filter part constituted by the honeycomb type porous filter element is provided in the upper part inside the can body, and the honeycomb filter part uses the central part as a dust-containing gas passage. The left and right are arranged to face each other, and an outlet for taking out a clean gas from the honeycomb filter section to the outside of the can body is provided on one side of the can body.
In a dust remover in which a cylindrical filter element and a dust hopper are arranged substantially vertically in the lower part, a clean gas duct provided in the rear part of each of the left and right honeycomb filter parts arranged opposite to each other, and the clean gas duct and the honeycomb filter part. A dust remover comprising: a plurality of support beams that support the same and have a hollow inside to communicate the same left and right clean gas ducts; and a pipe that guides the clean gas from the support beams to the outlet. Is.

According to a second aspect of the present invention, in the first aspect of the present invention, the support beam supported by the can body is supported by a support beam pedestal joined to an inner side surface of the can body and the same support. The beam is slidably connected to the support beam pedestal so as to absorb the expansion difference between the beam and the can body due to thermal expansion.

[0010]

Since the present invention is the above-mentioned means, in the invention of claim 1, a part of the dust-containing gas that has entered from the upper central portion of the honeycomb filter portion is opposed to each other across the dust-containing gas duct. After being filtered by the honeycomb filter part of No. 1, the gas flows into the clean gas duct that is connected to the back of each filter part. The inflowing clean gas is introduced into the support beam,
Since the supporting beam supports the load and is connected to each clean gas duct, a pipe is connected from one side of the clean gas duct to the clean gas outlet of the can body to take out clean gas from this outlet. The gas in the clean gas duct without piping is also communicated through the inner surface of the support beam and similarly extracted.

According to the second aspect of the present invention, since the plurality of support beams are slidably attached to the support beam pedestal attached to the can body, the diameter of the support beam and the can body due to thermal expansion. It will absorb the difference in direction.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the embodiments shown in the drawings. FIG. 1 is a vertical cross-sectional view of a dust remover according to an embodiment of the present invention. Reference numeral 1 denotes a can body of the dust remover, which is arranged substantially vertically and has a dust-containing gas inlet 2 for guiding the dust-containing gas FG to an upper portion thereof. However, dust hoppers 3 are provided in the lower part. Reference numeral 4 denotes a first honeycomb filter section, which is composed of a honeycomb filter element. Reference numeral 5 denotes a second filter portion, which is a cylindrical filter element. A clean gas outlet 6 takes out the clean gas G.

The portion according to the present invention is the honeycomb pack 10.
It is a portion A surrounded by a two-dot chain line in the first honeycomb filter portion 4 made of. A dust-containing gas partition wall 7 is provided in the upper center of the first honeycomb filter portion 4,
This partition wall 7 is separated from the first honeycomb filter portion 4 and does not come into contact with it even by thermal expansion.

Next, FIG. 2 is a detailed sectional view of the first honeycomb filter portion 4, FIG. 3 is a detailed view of portion B in FIG. 2, FIG. 4 is a sectional view taken along line CC of FIG. 2, and FIG. 6 is a sectional view taken along line DD in FIG.

The dust-containing gas duct 11 of the first honeycomb filter portion 4 is installed immediately below the dust-containing gas partition wall 7 described above.
Honeycomb pack 10 placed opposite to each other
However, in this embodiment, the number of packs is 4 packs of 2 rows in a single stage. As shown in the partial view, the clean gas ducts 6 are installed on the left and right sides of the back of the pack, and the honeycomb pack 10 has the seal packing 18 attached to the clean gas duct 6 by the mounting bolts 19 and nuts 20 as shown in FIG. It is installed with a sandwich.

Further, the honeycomb pack 10, the clean gas duct 6 and the dust-containing gas duct 11 have two hollow cross-section honeycomb support beams 13 as shown in the cross section CC of FIG.
However, the inside of the support beam 13 is also used as a duct by making holes in both the total of 4 places on the lower surface of each end on the support beam 13 of the clean gas duct 6 and the corresponding face of the support beam 13. is doing. A pipe 30 is connected to the clean gas outlet 16 from the bottom right side of the clean gas duct 6.

The attachment of the first honeycomb filter portion 4 is carried out by the honeycomb pack support beam pedestal 14 connected to the can body 1.
Both ends of the support beam 13 are placed on (in this example, a total of four places are supported) to receive the entire load of the honeycomb filter portion 4.
In addition, the pipe that enters the can body 1 from the backwash pipe seat 8 shown in FIG. 1 is the clean gas duct 6 immediately behind the honeycomb pack 10.
And is arranged as a backwash collecting pipe 15.

In the structure described above, the filter element of the honeycomb pack 10 in which the dust-containing gas partition wall 7 in the upper center portion of the first filter portion 4 enters the dust-containing gas duct 11 and a part of the dust-containing gas is arranged to face each other. Each honeycomb pack 10 filtered by 17 and the clean gas duct 6 in the rear part
Flow into.

The honeycomb pack support beam 13 supports the load of the first honeycomb filter portion 4 and has a hollow interior, is connected to the clean gas duct 6 and has a function as a communication duct. When the clean gas is taken out from the bottom surface of one side of the gas duct 6, the gas in the clean gas duct 6 on the opposite side is also communicated in the same manner.
3 will be taken out through this pipe.

When the first honeycomb filter portion 4 is arranged on the upper portion of the can body 1 as in this embodiment, the installation,
When performing maintenance, inspection, etc., it is necessary to secure a space for facilitating the work of the second filter portion 5 at the lower part. Therefore, the supporting beam 13 is also used as a communication duct, so the space is effective. Can be used for.

The difference in expansion between the can body 1 and the first honeycomb filter portion 4 due to thermal expansion is omitted between the honeycomb pack support beam 13 and the pedestal 14 receiving the same. By expanding the bolt holes on the support beam 13 side to loosen them in the diametrical direction, this difference is released. For the vertical direction, except for the support surface of the support beam support 14, except for the piping. There is no problem so there is no problem with the piping
A bellows pipe is attached to the clean air extraction pipe, and since the backwashing air pipe 8 is a small pipe and is long, there is no problem when it is arranged in consideration of the flexibility of the pipe itself.

[0022]

As described above in detail, in the present invention, the honeycomb filter is supported by using the supporting beam having the hollow cross section, and also serves as the communication duct of the clean gas duct after filtration. Further, since the connection with the can body is made only between the support pedestal attached to the can body and the support beam, the support beam is slidably connected to the pedestal, so that the extension between the can body and the support beam due to thermal expansion. The problem of difference or dust seal is solved, the difficulty of the conventional partition plate system is overcome, and the limited space for maintenance and inspection inside the can can be secured, and it is possible to provide a more compact filter section than before. It is possible.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a dust remover according to an embodiment of the present invention.

FIG. 2 is a detailed view of part A of FIG.

FIG. 3 is a detailed view of a B part in FIG.

FIG. 4 is a sectional view taken along line CC of FIG.

5 is a cross-sectional view taken along the line DD of FIG.

FIG. 6 is a vertical sectional view of a conventional dust removing device.

FIG. 7 is a view on arrow EE in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Can body 4 1st honeycomb filter part 5 2nd filter part 7 Dust-containing gas partition wall 10 Honeycomb pack 11 Dust-containing gas duct 12 Clean gas duct 13 Honeycomb pack support beam 14 Honeycomb pack support beam pedestal 15 Backwash collecting pipe 16 Clean Gas outlet 17 Filter element 30 Piping

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tetsuya Fujino 1-1, Atsunoura-machi, Nagasaki-shi Nagasaki Shipyard Ltd. (72) Inventor Yuichiro Kitagawa 1-1, Atsunoura-cho, Nagasaki-shi Nagasaki Shipbuilding In-house

Claims (2)

[Claims] 1. A honeycomb filter part composed of a honeycomb-type porous filter element is installed in an upper part inside a can body, and the honeycomb filter parts are arranged so as to oppose each other on the left and right with a central part as a dust-containing gas passage. An outlet for taking out clean gas from the filter unit to the outside of the can body is provided on one side of the can body, and in a dust removing device in which a cylindrical filter element and a dust hopper are arranged substantially vertically in the lower part, the left and right honeycombs opposed to each other A clean gas duct provided on the rear part of each of the filter parts, and a plurality of support beams that support the clean gas duct and the honeycomb filter part and communicate the clean gas ducts on the left and right with a hollow inside, and from the support beams. A dust remover comprising: a pipe for introducing clean gas to the outlet. 2. A support beam supported by the can body is supported by a support beam pedestal joined to an inner surface of the can body, and the support beam is slidably connected to the support beam pedestal. 2. The dust removing device according to claim 1, wherein the difference in expansion due to thermal expansion with the can body is absorbed.