JP4596263B2 - Filter cloth mounting hole closing method and filter cloth mounting hole closing jig - Google Patents

Description

  The present invention relates to a construction method for closing a filter cloth attachment hole after removing a filter attached to a bag filter facility and a jig used in the construction method, particularly when the closed filter cloth attachment hole is used again. The present invention relates to a filter cloth mounting hole closing method and jig suitable for the above.

The filter installed in the bag filter facility that collects dust in the exhaust gas is temporarily removed or replaced for the purpose of breakage, periodic repair / inspection, analysis, etc. of the filter. (For example, Patent Document 1 and Patent Document 2). If the filter is to be removed for the purpose of exchanging the filter, a new filter may be installed in the filter cloth mounting hole from which the old filter has been removed. However, the filter should be removed for repair, inspection, analysis, etc. In this case, it becomes a hole through which dust passes until the filter cloth is repaired, inspected, and analyzed. In this case, since the function as the bag filter facility is not fulfilled, it is desirable to stop the operation of the bag filter facility. However, bag filter equipment plays a very important role as environmental maintenance equipment in operating plant facilities such as factories, and the actual situation is that it is desired to shorten the time to stop its operation as much as possible. Based on such a situation, conventionally, as shown in FIG. 5, a can-made product made of SS, SUS or the like for the filter cloth mounting hole 2 in which the filter 4 provided on the top plate 1 in the bag filter equipment is removed. The lid body 3 was fitted to close the hole, and the bag filter equipment was operated. And when attaching the filter cloth 4 again to the closed filter cloth attachment hole 2, the said cover body 3 was removed and it respond | corresponded.
JP 2004-209336 A Japanese Patent Laying-Open No. 2005-7229 (particularly paragraph 0027)

  However, when the lid 3 is fixed to the filter cloth mounting hole 2 by the above method, a method of sealing the entire circumference of the lid 3 with a heat-resistant sealing material such as silicon sealant is employed. In this case, it took about 24 hours to dry the sealing material, during which time the operation of the bag filter equipment had to be stopped.

  Moreover, when attaching a filter again to the filter cloth attachment hole 2 closed as mentioned above, it is necessary to remove the lid 3 and the sealing material. At this time, since the sealing material is in close contact with the lid 3 and the filter cloth mounting hole 2, considerable labor and time must be spent to completely remove the sealing material from the periphery of the filter cloth mounting hole 2. There wasn't.

  Accordingly, the present invention provides a filter cloth attachment hole closing method and a filter cloth attachment hole closing jig capable of easily and quickly performing an operation of closing the filter cloth attachment hole and an operation of opening the closed filter cloth attachment hole. For the purpose.

The filter cloth attachment hole closing method according to the present invention for achieving the above object is a method for closing the filter cloth attachment hole after removing the filter from the filter cloth attachment hole provided in the bag filter equipment, A flexible member having the same diameter as that of the filter to be extracted and closing the filter cloth attachment hole, and a lower part formed in a constricted shape , and attaching the flexible member to the filter cloth The mounting member of the hole closing jig having a ring-shaped or tubular mounting member that is flexible and elastically deformable to be attached to the hole is deformed in a reduced diameter, and the hole closing jig is inserted into the filter cloth attachment hole, The attachment member is held in close contact with the inner surface of the filter cloth attachment hole by a restoring force of the attachment member, and the filter cloth attachment hole is closed by the flexible member. By closing the filter cloth attachment hole by such a construction method, it is possible to close the filter cloth attachment hole simply and quickly, similarly to the attachment of the filter, without using a sealing material or the like. Moreover, since the attachment member of the hole closing jig is a ring-shaped or tubular member that is flexible and elastically deformable, it is easy to remove the hole closing jig from the filter cloth attachment hole by reducing the diameter of the attachment member. . Furthermore, by making the bottom shape of the flexible member into a butt-indented shape, it becomes easier to sew and reduce the manufacturing cost as compared with those having a circular end.

Moreover, in the above construction methods, the flexible member is preferably a heat-resistant film member . Even when a heat-resistant sheet or the like is used as the flexible member, a hole closing jig can be configured and the method according to the invention can be carried out.

  Moreover, in the above construction methods, when the flexible member is a cylindrical body or a bag-like body having the same diameter as the filter, the length of the cylindrical body or the bag-like body is to be extracted. It should be shorter than the filter. By doing so, it is possible to manufacture a hole closing jig cheaper than the filter, and it is possible to economically implement the filter cloth attaching hole closing method.

Further, the hole closing jig used in the filter cloth attaching hole closing method is a jig for closing the filter cloth attaching hole provided in the bag filter equipment, and is formed with the same diameter as the opening of the filter cloth attaching hole. A flexible member having an upper portion for closing the filter cloth mounting hole and a lower portion formed in a narrow shape, and flexible and elastic deformation for mounting the flexible member to the filter cloth mounting hole What is necessary is just to be characterized by having a possible ring-shaped or tubular attachment member. By using the jig having such a configuration, the filter cloth mounting hole closing method can be carried out, and the respective effects can be achieved.

  According to the filter cloth attachment hole closing method having the above-described characteristics, the filter cloth attachment hole can be efficiently closed in a short time. Further, even when the filter is attached again to the closed filter cloth mounting hole, the hole closing jig can be easily removed, and the filter can be quickly mounted. For this reason, it is possible to shorten the time for stopping the operation of the bag filter equipment in order to close the filter cloth mounting hole or to reattach the filter to the closed filter cloth mounting hole.

  Hereinafter, embodiments of the filter cloth attachment hole closing method and the filter cloth attachment hole closing jig of the present invention will be described with reference to the drawings. In addition, embodiment shown below is a one part embodiment which concerns on this invention, and this invention is not restrained by the following forms.

  First, an embodiment relating to a filter cloth mounting hole closing jig (hole closing jig) 10 of the invention will be described with reference to FIG. In FIG. 1, FIG. 1A is a front view of a hole closing jig, and FIG. 1B is a schematic view showing a side view of the hole closing jig.

  The hole closing jig 10 of the present embodiment includes a flexible member 12 for closing a filter cloth attachment hole 32 provided in a top plate 30 in a bag filter facility for attaching the filter 20 shown in FIG. And an attachment member 14 for fixing the member 12 to the top plate 30.

  The attachment member 14 may be the same as that attached to the opening of the filter 20, and may be, for example, a snap ring or a leaf spring. The snap ring here is a circular metal ring that has flexibility and enables elastic deformation, and is deformed by applying a force in the radial direction (center direction), and the original is released by releasing the force. The shape is restored (hereinafter, the attachment member 14 is also referred to as a snap ring 14).

  The flexible member 12 is a member to which the snap ring 14 having the above-described characteristics is attached, and may be any member that can be bent as the shape of the snap ring 14 changes. Further, the flexible member 12 used in the present embodiment is not intended to completely seal the filter cloth mounting hole 32, and may be any member that can at least shield dust. For this reason, as an example of the flexible member 12, a filter member having a dust collection capability equivalent to a cloth used for a filter attached to a bag filter facility, that is, a filter cloth can be cited. Examples of the material for the filter cloth include P84, PTFE, telecommunications, PPS, glass double weave, tetron felt, pyrene felt, and those obtained by adding a laminate film and a PTFE film to these materials. By using a filter cloth equivalent to the filter 20 as a constituent member of the hole closing jig 10, it is possible to obtain a dust collecting effect while closing the filter cloth attachment hole 32 (hereinafter, the flexible member 12). This is also called filter cloth 12).

  As described above, when a filter cloth equivalent to the filter 20 is used as the flexible member 12, what is substantially configured is a filter. Configure the length to be short. For example, when the length of the filter cloth 22 of the filter 20 that is normally used is about 6 m to 12 m, the length of the filter cloth 12 provided in the hole closing jig 10 of this embodiment may be about 15 to 20 cm. desirable. By adopting such a configuration, the manufacturing cost can be greatly reduced as compared with the filter 20 that is normally used.

  As shown in FIG. 1, the shape of the hole closing jig 10 in the present embodiment is configured such that the upper part is formed in a cylindrical shape and the lower part is formed in a narrowed shape. The upper cylindrical shape is formed so that the diameter thereof is the same as that of the filter 20 that is normally used, that is, the same as the filter cloth mounting hole 32. The narrowed shape of the lower portion may be a so-called swelled shape in which a part of the cylinder is woven inward and the lower end is sewn. By making the bottom shape of the hole closing jig 10 into a bottom recess type, sewing becomes easier and manufacturing costs can be reduced as compared with those having a circular end.

  The snap ring 14 is attached to the upper cylindrical portion with respect to the flexible member 12 having such a configuration. In FIG. 1, the two snap rings 14, 14 are attached at intervals in the longitudinal direction. In addition, the top plate 30 provided with the filter cloth attachment hole 32 is provided with grooves 34 and 34 for fitting the snap ring 14 inside the filter cloth attachment hole 32, or a notch, etc. The flexible member 12 is fixed by fitting the snap ring 14 in close contact with the groove 34. The snap ring 14 may be attached to the flexible member 12 by sewing or the like.

  The state of attachment of the hole closing jig 10 having the above configuration to the filter cloth attachment hole 32 is as shown in FIG. That is, the filter 20 is attached via the snap ring 14 to the filter cloth attachment hole 32 provided in the top plate 30 after being extracted. Here, the hole closing jig 10 is attached in the same manner as the attachment of the filter 20. For example, in the case of the hole closing jig 10 configured as described above, a force is applied toward the center of the snap ring 14 to bend the snap ring 14 to reduce its diameter and insert it into the filter cloth mounting hole 32. With the hole closing jig 10 inserted in the filter cloth mounting hole 32, the snap ring 14 is aligned with the groove provided in the filter cloth mounting hole 32, and the applied force is released. As a result, the snap ring 14 returns to its original shape by the elastic force and is fitted into the groove 34. Thereby, the hole closing jig 10 comes into close contact with the filter cloth mounting hole 32, and the mounting is completed. Further, when removing the hole closing jig 10 from the filter cloth attachment hole 32, it is bent by applying a force toward the center of the snap ring 14 in the same manner as the attachment, and the hole closing jig 10 is pulled from the filter cloth attachment hole 32 in this state. It's fine if it comes out.

  The general configuration of the filter 20 that is normally used is as shown in FIG. That is, the filter cloth 22 is formed in a cylindrical shape having an opening at one end, and snap rings 24 and 24 attached to the opening of the filter cloth 22. The filter 20 having such a configuration includes a retainer 26 that is formed in a bowl shape and maintains the shape of the filter, a backwash nozzle (not shown), and the like.

  By attaching the hole closing jig 10 having the above configuration to the top plate 30 and closing the filter cloth attachment hole 32 as described above, no sealing material is required when attaching the hole closing jig 10. Thereafter, the time required for drying the sealing material becomes unnecessary, the construction time can be shortened, and the stop time of the dust collecting equipment can be shortened. Further, since the hole closing jig 10 has the same basic components as the filter 20 and the attachment method to the filter cloth attachment hole 32, management after attachment becomes easy. Furthermore, even when the filter 20 is attached to the closed filter cloth attachment hole 32 again, the hole closing jig 10 can be easily removed, so that the time required for attaching the filter 20 can be shortened. This is also largely due to the fact that the removal of the sealing material has been eliminated due to the absence of the sealing material conventionally used.

  In the said embodiment, although the lower shape of the hole closing jig 10 to be used was a bottom hollow type, the shape of the hole closing jig 10 is not limited to the said shape. For example, it is good also as a cylindrical shape of a lower end obstruction | occlusion type as shown in FIG. In this shape, the shape of the lower end portion of the hole closing jig 10 is formed in the same manner as the shape of the lower end portion of the filter 20 that is normally used. When the hole closing jig 10a is formed in such a shape, for example, the filter 20 whose upper side is damaged can be reused.

  In the above embodiment, the hole closing jig 10 has a cylindrical shape. However, since the role of the hole closing jig is to close the filter cloth attachment hole 32 with the flexible member 12, FIG. As shown, a configuration in which the flexible member 12 is attached in a film shape between the snap rings 14 and 14 may be employed. Even if it is the hole closing jig 10b of such a structure, there can exist an effect similar to the said embodiment. 4A shows a perspective view of the hole closing jig 10b, and FIG. 4B shows a front view of the hole closing jig 10b.

  Moreover, in the said embodiment, although the flexible member 12 was made into the filter cloth similar to the filter 20, if this is a heat resistant film | membrane member or filter member, it will be limited to the filter cloth similar to the filter 20 Not. For example, even when a flexible member 12 such as a heat-resistant sheet is used, the hole closing jig 10 used in this embodiment can be configured.

  The filter cloth mounting hole closing method as described above is not limited only to the case where filter repair, inspection, analysis, and the like are performed. For example, it can be applied to dry burning in a combustion furnace. Here, dry burning is performed to dry refractory bricks, etc. used in the combustion furnace provided in the front stage of the dust collection equipment, and gas, kerosene, heavy oil burners, etc. This means raising the temperature. Visible smoke, dust, etc. are generated by multiplying water vapor, combustion gas, etc. when drying, but since the amount of generated gas is small, conventionally, gas has not been passed to the dust collection facility. However, in recent years, due to environmental problems and the like, in consideration of neighboring facilities, gas generated at the time of drying is often passed through dust collection equipment (bag filter equipment). The gas generated at the time of dry burning contains a very large amount of moisture, and there is a high possibility that dew condensation will occur in the bag filter equipment, particularly in the filter. When condensation occurs in the filter, the filter is clogged or in a state where there is a high possibility of clogging. Therefore, it is assumed that the filter used for drying is disposable. As described above, the amount of gas generated during dry burning is smaller than the amount of gas generated when the combustion furnace is normally operated. It is advantageous in terms of cost to remove the filter intermittently. The filter cloth mounting hole from which the filter has been removed can be dried and fired by attaching the above-mentioned hole closing jig. Even in such a case, even if the filter cloth attachment hole closing method of the present invention is used, the same effect as the above embodiment can be obtained. In addition, since the number of disposable filters can be reduced, there is a cost reduction effect.

It is a figure which shows the structure of the filter cloth attachment hole plugging jig of this invention. It is a figure which shows the attachment state of a hole closing jig. It is a perspective view which shows the 1st modification of the filter cloth attachment hole plugging jig of this invention. It is the perspective view and front view which show the 2nd modification of the filter cloth attachment hole plugging jig of this invention. It is a perspective view which shows the prior art example of the filter cloth attachment hole plugging method.

Explanation of symbols

  10 ......... Hole closing jig (filter cloth attaching hole closing jig), 12 ......... Flexible member (filter cloth), 14 ......... Installing member (snap ring), 30 ......... Top plate, 32 ... … Filter cloth mounting hole, 34 ……… groove.

Claims (4)

A method for closing the filter cloth mounting hole after removing the filter from the filter cloth mounting hole provided in the bag filter equipment,
A flexible member having the same diameter as that of the filter to be extracted and closing the filter cloth attachment hole, and a lower part formed in a constricted shape , and attaching the flexible member to the filter cloth Reducing the diameter of the mounting member of the hole closing jig having a ring-shaped or tubular mounting member that is flexible and elastically deformable for mounting in the hole, and inserting the hole closing jig into the filter cloth mounting hole;
A filter cloth attachment hole closing method, wherein the attachment member is held in close contact with an inner surface of the filter cloth attachment hole by a restoring force of the attachment member, and the filter cloth attachment hole is closed by the flexible member. The filter cloth mounting hole closing method according to claim 1, wherein the flexible member is a heat-resistant film member .   When the flexible member is a cylindrical body or a bag-like body having the same diameter as the filter, the length of the cylindrical body or the bag-like body is made shorter than the filter to be extracted. The filter cloth attachment hole plugging method according to claim 2. A jig for closing a filter cloth mounting hole provided in a bag filter facility,
A flexible member having an upper part formed to have the same diameter as the opening of the filter cloth mounting hole and closing the filter cloth mounting hole ; and a lower part formed in a narrowed shape ;
A filter cloth attachment hole closing jig comprising a ring-shaped or tubular attachment member that is flexible and elastically deformable for attaching the flexible member to the filter cloth attachment hole.

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