JP5008614B2 - Ceramic filter mounting structure - Google Patents

Description

  The present invention relates to a ceramic filter mounting structure used in a filtration type dust collector for removing dust from exhaust gas containing dust.

  When incinerating or gasifying general waste, industrial waste, and organic waste such as wood waste and sewage sludge, exhaust gas containing dust is generated. Such exhaust gas is removed by a filtering dust collector before being released to the atmosphere. Here, when the exhaust gas is hot, a filtration type dust collector equipped with a heat-resistant ceramic filter is used.

  This type of filtration dust collector has a gas introduction chamber (dirty side area before dust collection) into which exhaust gas is introduced, and a gas outlet chamber (clean side area after dust collection) from which clean gas after dust removal is led out. And a cylindrical ceramic filter having one end opened and the other end closed is installed in a gas introduction chamber of the casing. Configured. In this case, the ceramic filter is installed so that the opening on one end side of the ceramic filter matches the opening hole of the partition wall. As a ceramic filter to be used, there are a type having no wrinkles (see Patent Document 1) and a type having a wrinkle at one end (see Patent Document 2).

JP-A-5-345109 JP 2005-342622 A

  By the way, in the case of using a cylindrical ceramic filter without wrinkles, the sealing area is smaller than that of a wrinkle type when considering the sealing performance between the dirty side region and the clean side region. , There is a disadvantage that the sealing performance is inferior. For this reason, it is desirable to use a ceramic filter with a hook in order to ensure good sealing performance.

  FIG. 3 is a cross-sectional view showing a mounting structure of a conventional flanged ceramic filter. As shown in the drawing, the ceramic filter 50 has a flange portion 51 on one end side outer peripheral surface, and has a cylindrical shape in which one end side is opened and the other end side is closed. In the filtration type dust collector, a gas introduction chamber (dirty side chamber) 52 into which exhaust gas is introduced and a gas lead-out chamber (clean side chamber) 53 into which clean gas after dust removal is led out are continuously provided with a partition wall 54 therebetween. A casing is provided. An opening 55 is formed in the partition wall 54, and a ceramic filter 50 is inserted in the opening 55 from the gas outlet chamber 53 side in the direction of the arrow P in the lateral direction with the other end facing forward. It is attached to the partition wall 54 at the location of the flange 51 via a member. A backwashing device 58 including a backwashing nozzle 56, a solenoid valve 57, and the like is installed in the gas outlet chamber 53, and backwashing fluid such as compressed air is introduced into the ceramic filter 50 by the backwashing device 58. Infused regularly.

  However, in the ceramic filter mounting structure shown in FIG. 3, when the ceramic filter 50 is mounted or removed, the ceramic filter 50 is inserted into the opening 55 of the partition wall 54 from the gas outlet chamber 53 side. Since the ceramic filter 50 is pulled out from the opening 55 to the gas outlet chamber 53 side, it is necessary to remove all or a part of the backwash device 58 and open the clean side. For this reason, there is a problem that not only the installation and removal work of the ceramic filter 50 is complicated, but also the maintainability is poor, such as the need to ensure the sealing performance between the inside and outside of the facility when the opening 55 is closed after the work. It was.

  The present invention has been made to solve the above-mentioned problems, and it is not necessary to remove devices and members installed on the clean side such as a backwash device when installing and removing the ceramic filter, and maintenance. An object of the present invention is to provide a ceramic filter mounting structure that is excellent in performance and can improve the sealing performance between the clean side and the dirty side.

In order to achieve the above object, a ceramic filter mounting structure according to the present invention comprises:
A cylindrical ceramic filter, which has a flange on the outer peripheral surface at one end and is open at one end and closed at the other end, leads to a gas introduction chamber into which exhaust gas is introduced and clean gas after dust removal A ceramic filter mounting structure that is mounted in the gas introduction chamber of a casing that is continuously provided with a partition wall and a gas outlet chamber;
A mounting base for attaching one end of the ceramic filter to the gas introduction chamber side of the partition wall is provided, and a support base for supporting the other end of the ceramic filter is provided on the outer wall of the casing facing the mounting base. With the annular sealing material arranged on the mounting base, the ceramic filter is inserted from the gas introduction chamber side with one end portion thereof facing forward, and the seal is interposed between the flange portion and the partition wall. It pushes so that material may be inserted | pinched, and the other end part of this ceramic filter is supported by the said support stand, It is characterized by the above-mentioned.

  In the present invention, an annular spacer is preferably disposed on the inner peripheral side of the sealing material.

  In addition, when the spacer is made of metal, it is preferable that a cushioning material is interposed between the spacer and the ceramic filter.

  Preferably, the mounting base is formed in an annular shape, and a cushioning material is interposed in a gap between the inner peripheral surface of the mounting base and the outer peripheral surface of the flange portion of the ceramic filter.

  Further, it is preferable that a bottomed cylindrical receiving metal fitting is attached to the other end of the ceramic filter, and a bottomed cylindrical cushioning material is attached to the inside of the receiving metal fitting.

  According to the present invention, since the ceramic filter having the collar portion is inserted from the gas introduction chamber side that is the dirty side, devices and members such as a backwash device installed on the clean side (gas outlet chamber side) There is no need to remove it, and a mounting structure with excellent maintainability can be obtained. Moreover, since the ceramic filter is provided with a collar part, the sealing performance between the clean side and the dirty side can be further enhanced as compared with a ceramic filter without a collar part. Furthermore, since the ceramic filter is installed from the dirty side, the clean side can be sealed, and the clean side seal structure can be simplified.

  Next, specific embodiments of the ceramic filter mounting structure according to the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view showing a ceramic filter mounting structure according to an embodiment of the present invention.

  In the filtration type dust collector of this embodiment, the casing includes an outer wall 1 and a partition wall 2 provided so as to face the inner side of the outer wall 1, and the internal space of the casing is a gas into which exhaust gas is introduced. It is divided into an introduction chamber (dirty side region before dust collection) 3 and a gas lead-out chamber (clean side region after dust collection) 4 from which clean gas after dust removal is led out. The partition wall 2 is formed with a circular opening 6 for circulating the exhaust gas from the gas introduction chamber 3 side through the ceramic filter 5 to the gas outlet chamber 4 side.

  The ceramic filter 5 is porous and has heat resistance, and has a cylindrical shape as a whole. One end side is opened at the opening portion 7 and the other end side is closed at the closing portion 8. 9 is provided. Thus, by passing the exhaust gas from the cylindrical outer peripheral surface of the ceramic filter 5 toward the internal space, dust in the exhaust gas is removed, and the clean gas after dust removal passes through the opening 7 and the opening 6. Derived to the gas outlet chamber 4 side.

  An annular mounting base 10 protrudes from the partition wall 2 on the gas introduction chamber 3 side so as to surround the opening 6, and the outer wall 1 facing the mounting base 10 is formed on the outer wall 1. An annular support 12 is provided so as to cover the edge of the opening 11. Here, the mounting base 10 is concentric with the circular aperture 6 and has an inner diameter that is substantially the same as the outer diameter of the flange 9, whereby the shaft center of the ceramic filter 5 is aligned with the aperture 6. It can be easily adjusted to the center.

  At a place where the ceramic filter 5 is attached to the partition wall 2 at one end, an annular sealing material 13 is disposed inside the mounting base 10, and a spacer 14 is disposed on the inner peripheral side of the sealing material 13. The spacer 14 is a metal fitting having a shape in which an annular protrusion 14 b having the same inner diameter as the inner diameter of the opening 6 is integrated with one end of an annular base 14 a having the same outer diameter as the inner diameter of the sealing material 13. The projection 14b is fitted into the opening 6 so that the axis of the ceramic filter 5 and the axis of the spacer 14 can be easily aligned. In addition, a cushioning material 19 is installed between the base portion 14a of the spacer 14 and the end face of the flange portion 9 of the ceramic filter 5, so that when the spacer 14 is made of metal, the spacer 14 is in direct contact with the ceramic filter 5. Thus, the ceramic filter 5 is prevented from being damaged. Thus, by sealing the sealing material 13 between the ceramic filter 5 and the partition wall 2 and compressing, the desired sealing performance can be secured by utilizing the reaction force of the sealing material 13. As the sealing material 13, it is necessary to select a material that can maintain elasticity and resilience even in a high temperature atmosphere.

  A buffer material 15 is packed between the mounting base 10 and the outer peripheral surface of the flange 9 of the ceramic filter 5 so as to prevent the ceramic filter 5 from coming into direct contact with the metal mounting base 10 and being damaged. Is done. Further, by arranging the buffer material 15, the height direction, the lateral direction, and the inclination of the ceramic filter 5 can be restricted to a certain degree.

  On the other hand, at the place where the ceramic filter 5 is attached to the outer wall 1 at the other end, the cylindrical support end 12 and the ceramic filter 5 are in direct contact with each other and closed at one end in order to prevent damage. A buffer material 16 having a shape (bottom cylindrical shape) is attached so as to wrap the other end of the ceramic filter 5, and a receiving metal fitting 17 having a shape similar to that of the buffer material 16 is attached to the outer periphery of the buffer material 16.

  In the filtration type dust collector configured as described above, when the ceramic filter 5 is attached, the ceramic filter 5 is placed in front of the flange 9 with the sealing material 13 and the spacer 14 installed on the mounting base 10. Then, insert it sideways from the gas introduction chamber 3 side. Then, the closing side of the metal fitting 17 is pushed toward the partition wall 2 together with the ceramic filter 5 by the push rod 18, and the sealing material 13 is compressed at the end face of the flange portion 9 of the ceramic filter 5. At this time, since the push-in position of the ceramic filter 5 is determined by the spacer 14, the sealing material 13 can always have a predetermined compression rate. The pushing force by the push rod 18 is obtained by using a reaction force of a compression spring (not shown) or a bolt tightening force.

  Thus, when the ceramic filter 5 is pushed in, the axial center of the ceramic filter 5 and the axial center of the spacer 14 can be made to correspond. Further, the shock absorbing material 15 disposed on the outer peripheral portion of the flange portion 9 of the ceramic filter 5 and the shock absorbing material 16 and the receiving metal member 17 disposed on the other end portion prevent the ceramic filter 5 from being damaged. The height, lateral direction and inclination of the ceramic filter 5 are constrained by the material 15 and the ceramic filter 5 is held at a predetermined position. In addition, the sealing material 13 and the spacer 14 disposed on one end surface of the ceramic filter 5 can ensure good sealing performance between the gas outlet chamber 4 on the clean side and the gas inlet chamber 3 on the dirty side. .

  The schematic block diagram of the filtration type dust collector which concerns on other embodiment of this invention is shown by FIG.

  In the filtration type dust collector 20 of the present embodiment, the gas outlet chamber 21 on the clean side has a sealed structure, and the gas outlet chamber 21 is disposed in the internal space of the gas inlet chamber 22 on the dirty side. .

  According to the idea of the present invention in which the ceramic filter 5 is installed from the dirty side, the clean side can be sealed as shown in this example, and the clean side seal structure can be simplified. On the other hand, in the conventional technique in which the ceramic filter is installed from the clean side, since the clean side needs to be opened, there is a drawback in that a structure considering the sealing property must be taken.

Sectional drawing showing the attachment structure of the ceramic filter which concerns on one Embodiment of this invention. Schematic configuration diagram of a filtration dust collector according to another embodiment of the present invention Sectional view showing the mounting structure of a conventional ceramic filter with a hook

Explanation of symbols

1 External wall 2 Partition wall 3,22 Gas introduction chamber (dirty side area before dust collection)
4,21 Gas outlet chamber (clean area after dust collection)
DESCRIPTION OF SYMBOLS 5 Ceramic filter 6,11 Opening part 7 Opening part 8 Closing part 9 Girder part 10 Mounting base 12 Supporting base 13 Sealing material 14 Spacer 15, 16 Buffering material 17 Receptacle 18 Push rod 19

Claims (5)

A cylindrical ceramic filter, which has a flange on the outer peripheral surface at one end and is open at one end and closed at the other end, leads to a gas introduction chamber into which exhaust gas is introduced and clean gas after dust removal A ceramic filter mounting structure that is mounted in the gas introduction chamber of a casing that is continuously provided with a partition wall and a gas outlet chamber;
A mounting base for attaching one end of the ceramic filter to the gas introduction chamber side of the partition wall is provided, and a support base for supporting the other end of the ceramic filter is provided on the outer wall of the casing facing the mounting base. With the annular sealing material arranged on the mounting base, the ceramic filter is inserted from the gas introduction chamber side with one end portion thereof facing forward, and the seal is interposed between the flange portion and the partition wall. A ceramic filter mounting structure, wherein the ceramic filter is pushed in such a manner that a material is sandwiched therebetween, and the other end of the ceramic filter is supported by the support base.   The ceramic filter mounting structure according to claim 1, wherein an annular spacer is disposed on an inner peripheral side of the sealing material.   The ceramic filter mounting structure according to claim 2, wherein a cushioning material is interposed between the spacer and the ceramic filter.   The ceramic filter according to any one of claims 1 to 3, wherein the mounting base is formed in an annular shape, and a buffer material is interposed in a gap between an inner peripheral surface of the mounting base and an outer peripheral surface of the flange portion of the ceramic filter. Mounting structure.   The ceramic filter mounting structure according to any one of claims 1 to 4, wherein a bottomed cylindrical receiving metal fitting is attached to the other end of the ceramic filter, and a bottomed cylindrical cushioning material is attached to the inside of the receiving metal fitting. .

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