JP2001276534A - Solid-gas separating filter and solid-gas separating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that in a bag filter prepared by forming a filter fabric into a bag-like shape, it is difficult to regenerate it when clogging is generated and it has to be replaced with a new bag filter when it is partly damaged. SOLUTION: A solid-gas separating filter 10 is constituted by binding a number of cord-like filter raw materials 11 with binding members 12. As it exhibits superior sweep off properties for dust to the filter fabric, it is suppressed to increase in filtering resistance caused by use for a long period and it exhibits excellent regenerating properties by cleaning, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-gas separation filter for collecting solid particles contained in an air flow, and a solid-gas separation device provided with the solid-gas separation filter.

[0002]

2. Description of the Related Art A bag filter has been conventionally known as such a solid-gas separation filter. FIG. 8 shows an example of a bag filter. The bag filter 1 is configured by forming a filter cloth into a bag shape, and has an opening 2 on one end side. As the shape of the bag filter 1, there are an envelope shape and the like in addition to the cylindrical shape as shown in FIG. 8, and each of them is formed in a hollow bag shape. For the filter cloth, cotton, nylon, Tetron (registered trademark), glass fiber, etc. are used.
Both woven and non-woven fabrics (such as felt) are used.

FIG. 9 shows a solid-gas separation apparatus provided with such a bag filter. In this solid-gas separation device, a bag filter 1 is disposed in a flow path of a dust-containing gas in a dust chamber 3, and a mechanism for filtering and collecting dust in the dust-containing gas in the bag filter 1. .

[0004] Further, the collected dust adheres and accumulates on the surface of the filter cloth, and the amount of the accumulated dust increases as the filtration proceeds, and the filtration resistance (pressure loss) of the bag filter increases. It is necessary to perform an operation of appropriately removing the money.
As a method of removing the dust layer adhered and deposited on the bag filter 1, a pulse air method in which high-pressure air is blown from the nozzle 4 provided on the upper part of the dust chamber 3 to the bag filter 1, as shown in FIG. A vibration generator 6 is attached to the support member 5 on which the bag filter 1 is suspended.
In many cases, a vibration method in which a mechanical vibration is applied by a method, a reverse airflow method in which a clean airflow passes in a direction opposite to a filtration direction, and the like are employed.

[0005]

As described above, in a solid-gas separation apparatus for collecting dust and the like using a solid-gas separation filter, it is necessary to periodically wash off a dust layer deposited and deposited on the filter cloth surface. . However, dust particles gradually enter the inside of the fiber layer of the filter cloth due to long-term operation, and it becomes difficult to remove the dust particles even by removing the dust particles, and the filtration resistance may significantly increase.

[0006] Further, in the case where dust having high adhesion or dust having a small particle diameter is collected, dust is not sufficiently removed from the filter cloth and clogging occurs even if the above-mentioned wiping treatment is performed. It became difficult to regenerate the filter cloth which was easily clogged at one end. In addition, if the mechanical vibration applied to the filter cloth is increased or the operating pressure of reverse airflow, pulse jet, etc. is increased to remove such highly adherent dust, the filter cloth may be damaged such as perforated. When a part of the filter cloth is damaged, repair of the damaged part is indispensable, and in many cases, the filter cloth must be replaced with a new bag filter.

Accordingly, the present invention has been made to solve these problems, and an object of the present invention is to provide a solid-gas separation filter having excellent dust-off properties and a solid-gas separation filter provided with the solid-gas separation filter. It is to provide a device.

[0008]

According to a first aspect of the present invention, there is provided a solid-gas separation filter for collecting solid particles contained in an air flow. It is characterized in that the material is formed by collecting materials in a bundle.

[0009] By gathering the cord-like filter materials into a solid bundle in this manner, the gap between the cord-like filter materials exerts a filtering action, so that the air flow containing solid particles flows through the bundle of filter materials. During the passage, solid particles such as dust are trapped in gaps between the filter materials, and the whole aggregate of the cord-like filter materials functions as a solid-gas separation filter.

[0010] The filter material is not necessarily limited to a single filter material, but also includes a single filter material formed by twisting a plurality of small-diameter filter materials.

According to a second aspect of the present invention, there is provided a solid-gas separation filter according to the first aspect, further comprising a binding member for binding a plurality of filter materials.

By providing such a binding member, binding and unbinding of the filter material are facilitated, and a binding portion can be appropriately selected. In addition, it becomes possible to adjust the binding force when binding a plurality of filter materials, and since the aggregation density of the filter material changes by adjusting the binding force, the collection performance of the solid-gas separation filter is adjusted. be able to.

According to a third aspect of the present invention, in the solid-gas separation filter according to the second aspect, when the binding by the binding member is released, the filter materials can be separated from each other.

When the binding by the binding member is released, the filter materials can be separated from each other, so that the solid particles adhered and deposited on the surface of the filter material can be effectively removed and washed. .

According to a fourth aspect of the present invention, there is provided a solid-gas separation device provided with a housing having an airflow inlet and an airflow outlet, and a solid particle included in the airflow flowing in the airflow passage passing through the housing. And a solid-gas separation filter for collecting the solid-gas separation filter, wherein the solid-gas separation filter is the solid-gas separation filter according to any one of claims 1, 2, and 3.

By using the solid-gas separation filter formed by collecting the cord-like filter materials in a bundle as described above as a solid-gas separation filter in a solid-gas separation device, the solid-gas separation filter adheres to the solid-gas separation filter. Because of the excellent property of removing particles, an increase in pressure loss can be suppressed, and dust can be efficiently removed. In addition, since the use period until the regeneration of the solid-gas separation filter becomes necessary can be lengthened, the operation rate of the solid-gas separation device can be improved.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the accompanying drawings.

As shown in FIGS. 1 (a) and 1 (b), a solid-gas separation filter 10 according to the embodiment is formed by gathering a long cord-like filter material 11 in a bundle. The vicinity of both ends in the length direction is bound by a binding member 12 to form a bundle-like aggregate of the cord-like filter material 11. By thus forming the solid-gas separation filter 10 by gathering the cord-like filter materials 11 in a bundle, the gap between the long cord-like filter materials 11 exerts a filtering action, and the cord-like filter materials 11 Solid particles such as dust are trapped in the gap.

The size of the solid-gas separation filter 10 is, for example, a type used in an industrial solid-gas separation device 20 as described later, and the diameter in a state of being bound in a cylindrical shape is 100 mm to 300 mm. In many cases, it is used in a range of about 2 m to 12 m in length.

Each cord-like filter material 11 is made by combining one of natural fibers such as cotton, synthetic fibers such as nylon, Tetron and Teflon (registered trademark), and inorganic fibers such as glass and stainless steel. Is formed in the shape of a rope rope, the diameter of which is about 0.1 mm to 20 mm,
It is preferably about 0.2 mm to 5 mm, and is appropriately selected depending on the size and properties of the solid particles to be collected. It should be noted that the cord-like filter material 11 is not limited to a material formed by twisting fiber materials for a filter as described above, but may be formed by, for example, forming a cord-like body having a large diameter with Teflon or the like. Instead, one cord-like filter material 11 may be formed.

As shown in FIG. 2, the binding member 12 is composed of, for example, two semicircular arc-shaped frames 12A. Is arranged in the center, and the frame members 12A are attached to each other from both sides thereof.
Connect and fix each other. By adjusting the binding force and the binding portion of the binding member 12 configured in this way, the gap (aggregation density) between the bundled cord-like filter materials 11 changes, and thus the solid-gas separation filter It is also possible to adjust the trapping performance.

FIG. 3 shows an example in which such a solid-gas separation filter 10 is provided in a solid-gas separation device 20.

The dust chamber 21 of the solid-gas separation device 20
Inside, a dust collecting chamber 21A into which dust-containing air is introduced, and a collecting chamber 21B where clean air after dust is collected are collected.
The partition plate 22 is partitioned, and one end of the solid-gas separation filter 10 is attached to an opening formed in the partition plate 22. Therefore, the main body portion including the other end side of the solid-gas separation filter 10 is in a state of protruding from the partition plate 22 to the dust collection chamber 21A side.

The dust-containing air introduced into the dust collecting chamber 21A from the inlet 23 passes through the solid-gas separation filter 10 and flows out to the collecting chamber 21B. Solid particles such as are collected. Then, the clean air that has flowed out to the collective room 21B is
Through the dust chamber 21.

Assuming a new solid-gas separation filter 10 that does not collect any solid particles, a cord-like filter material 11
On the side surface of the solid-gas separation filter 10 which is parallel to the length direction, the filter resistance is relatively high because the cord-like filter materials 11 are in close contact with each other. In contrast,
In a cross section of the solid-gas separation filter 10 cut in a direction perpendicular to the length direction of the cord-like filter material 11, as shown in FIG. A gap S between adjacent cord-like filter materials 11
Is formed, and the gap S is formed along the side surface of the cord-like filter material 11. For this reason, the dust collection chamber 21
Lower end surface of solid-gas separation filter 10 projecting to A side (tip surface of solid-gas separation filter 10 projecting into dust collection chamber 21A) 1
At 0A, the filtration resistance is relatively small.

As described above, in the new solid-gas separation filter 10 which does not collect any solid particles, the filtration resistance of the lower end face 10A is smaller than that of the side face side. In the initial state of dust collection, the airflow of the dust-containing air introduced into the dust collection chamber 21A mainly flows into the solid-gas separation filter 10 from the lower end surface 10A of the solid-gas separation filter 10. Solid particles are collected by the solid-gas separation filter 10 due to the effects of inertial collision, blocking effect, Brownian diffusion effect, etc. Small solid particles are mainly collected by the Brownian diffusion effect. The moving distance of the airflow flowing from the lower surface of the solid-gas separation filter 10 (the proximity time to the cord-like filter material 11)
Is longer than when flowing from the side surface of the solid-gas separation filter 10, so that the collection effect by Brownian diffusion in the early stage of dust collection can be increased. Thereafter, when solid particles such as dust are collected and a dust accumulation layer starts to be formed between the cord-like filter materials 11, the filtration resistance at the lower end face 10A of the solid-gas separation filter 10 increases, -Gas separation filter 1 including a lower end face 10A
0 has substantially uniform filtration resistance on all surfaces.

In the conventional bag filter, on the other hand, solid particles such as dust are deposited on the surface of the fiber layer of the bag filter to form a deposited layer, and the deposited layer traps solid particles in the airflow. The main trapping action. For this reason, in the case of a new filter cloth that does not collect solid particles at all, or in the early stage of dust collection where the sedimentary layer is insufficient immediately after the removal, dust-containing air passes through the gaps in the weave of the fiber. Will decrease. In this regard, the solid-gas separation filter 10
In the case where is used, as shown in FIG. 7 later, a higher dust removal effect can be obtained even in the early stage of dust collection than in the case where a conventional bag filter is used.

In order to remove dust adhering to the solid-gas separation filter 10, the solid-gas separation device 20 shown in FIG. 3 is provided with an air nozzle 25 above the position where the solid-gas separation filter 10 is provided. High-pressure air is instantaneously blown from the air nozzle 25 to each of the solid-gas separation filters 10 to remove dust adhering between the cord-like filter materials 11. Also at this time, since the removed dust is easy to fall down along the surface of the cord-like filter material 11 and through the gap S between the cord-like filter materials 11, Excellent dropping properties.

In addition to the above-described pulse air type, a mechanical vibration type in which mechanical vibration is applied to the solid-gas separation filter 10 to remove dust adhering thereto, and a clean air stream flows in a direction opposite to the filtration direction. In addition to the reverse airflow method for removing attached dust, a conventional removal method such as a reverse jet method can be applied as it is.

On the other hand, if dust particles enter the center of the solid-gas separation filter 10 and the filtration resistance is not sufficiently improved even by such a removal method, the solid-gas separation filter 10 is removed. It is also possible to remove it from the device 20 and play it back.

FIG. 5 shows a cleaning system for the solid-gas separation filter 10. The solid-gas separation filter 10 removed from the solid-gas separation device 20 is washed in the washing water tank 30. On this occasion,
By releasing the binding by the binding member 12 and separating and cleaning the individual cord-like filter materials 11, dust adhering between the cord-like filter materials 11 can be efficiently removed. At this time, for example, by washing in a state in which one of the two binding members 12 that have bound both ends is alternately removed, the cord-like filter material 1 in the washing water tank 30 is removed.
The cleaning operation can be efficiently performed without dispersing the 1s. After being washed, the cord-like filter material 11 can be regenerated as a solid-gas separation filter 10 by being bound by a binding member 12 after drying, and then attached to the solid-gas separation device 20.

The washing water used for washing is treated by the drainage treatment equipment 40, and the treated water can be supplied to the washing water tank 30 and used again as washing water.

For example, when the damaged wire filter material 11 is found during the washing operation, only the damaged wire filter material 11 is replaced with a new wire filter material 1.
1 can be replaced, the maintenance cost can be reduced, and the damaged cord-like filter material 11 can be discarded after cleaning, so that the environment can be sufficiently considered.

Here, as a comparative example of the conventional bag filter and the solid-gas separation filter of the present embodiment, FIG. 6 shows the pressure loss, and FIG. 7 shows the dust collection efficiency at the initial stage of dust collection. In each of the comparative examples, the dust to be collected was carbon particles, and the conventional bag filter used was a nonwoven fabric of nylon as a filter cloth material.

In the comparative example of the pressure loss in FIG. 6, dust was removed from each filter by the pulse jet method every 8 hours, and the filter was washed by water every 150 hours.

According to the comparison results shown in FIG. 6, the solid-gas separation filter 10 of the present embodiment generally has a lower pressure loss than the conventional bag filter, and increases the pressure loss due to the regeneration treatment by washing. It was confirmed that it could be kept lower. Further, from the comparison result of FIG. 7, the solid-gas separation filter 10 of the present embodiment can collect more dust particles having a small particle diameter even in the early stage of dust collection, and can collect the dust in the early stage of dust collection. It was confirmed that the dust efficiency was higher.

In the embodiment described above, the binding member 12
As an example, a structure in which a semicircular frame 12A is attached is exemplified. However, other than this, any material can be used as long as the bundled wire filter material 11 can be bound, for example, using a ring-shaped rubber member. There is no particular limitation.

Further, the binding member 12 is not necessarily required.
It is not necessary to bind them together, for example, each of the cord-like filter materials 11 is individually suspended from the ceiling of the collecting room 21B in FIG. 3 one by one, and the cord-like filter materials 11 are gathered in a bundle. It is good also as composition.

The solid-gas separation filter 10 collects useful powder from gas, in addition to a dust collector for collecting dust contained in combustion exhaust gas in a boiler, a sintering furnace, a refuse incinerator or the like. It can also be used in fields. In addition to such industrial use, it can be used as a dust filter in a home / vehicle air purifier, etc.
There is no particular limitation as long as it is used as a filter for collecting and collecting solid particles in an airflow.

Also, by changing the binding force and the binding position of the binding member 12, the aggregate density of the cord-like filter materials 11, that is, the size of the gap between the cord-like filter materials 11, can be changed. It is also possible to adjust the collecting performance of the solid-gas separation filter 10 as a whole.

Further, the flow path of the dust-containing air passing through the solid-gas separation filter 10 is, for example, prevented from flowing in and out from the side surface of the solid-gas separation filter 10 so that only the space between both end faces in the length direction is provided. Or circulate the solid-gas separation filter 10 into a flat plate shape of a predetermined thickness,
It is also possible to adopt a system in which only the both sides of the solid-gas separation filter 10 are circulated.

[0042]

As described above, the solid-gas separation filter according to any one of claims 1 to 3 is configured by collecting a cord-like filter material in a bundle, so that a solid such as dust is formed in a gap between the filter materials. Since the particles are collected, it can function as a solid-gas separation filter.

As described above, since the solid-gas separation filter is constituted by the cord-like filter material, the dust-off property is superior to that of the conventional solid-gas separation filter in which the filter cloth is formed in a bag shape. In addition, an increase in filtration resistance due to long-term use can be suppressed. It also has a high effect of removing adhering dust by washing, and it is possible to replace only a part of the damaged filter material, so it is excellent in reproducibility and can be used repeatedly for a long time. Demonstrate.

Further, the solid-gas separation device according to claim 4 comprises:
The solid-gas separation filter for collecting solid particles contained in the airflow is constituted by the solid-gas separation filter according to any one of claims 1, 2 and 3. Since this solid-gas separation filter is excellent in removing the attached solid particles, the rise in pressure loss can be suppressed and dust can be removed efficiently. Further, since the use period until the regeneration of the solid-gas separation filter becomes necessary can be lengthened, the operation rate of the solid-gas separation device can be improved.

[Brief description of the drawings]

FIG. 1A is a side view of a solid-gas separation filter according to an embodiment, and FIG. 1B is a cross-sectional view taken along line AA in FIG.

FIG. 2 is a perspective view showing a binding member.

FIG. 3 is a configuration diagram schematically showing a solid-gas separation device.

FIG. 4 is a diagram showing a set state of a cord-like filter material,
It is sectional drawing of the perpendicular direction with respect to the length direction of a cord filter material.

FIG. 5 is a block diagram schematically showing a system for cleaning a solid-gas separation filter.

FIG. 6 is a graph showing a change in pressure loss of the solid-gas separation filter with respect to the operation time of the solid-gas separation device, comparing the conventional bag filter with the solid-gas separation filter of the present embodiment.

FIG. 7 is a graph showing a comparison between the conventional bag filter and the solid-gas separation filter of the present embodiment with respect to the partial dust collection efficiency for each particle diameter of the collected dust particles.

FIG. 8 is a perspective view showing a conventional bag filter.

FIG. 9 is a configuration diagram schematically showing a conventional solid-gas separation device.

FIG. 10 is a configuration diagram schematically showing a conventional solid-gas separation device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bag filter, 10 ... Solid-gas separation filter, 11 ... Cord filter material 12 ... Bundling member, 20 ... Solid-gas separation device, 21 ... Dust chamber 21A ... Dust collection chamber, 21B ... Collecting chamber, 22 ... Partition board, 25
... air nozzle 30 ... washing water tank

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mitsuhiro Mieno 63-30 Yuyogaoka, Hiratsuka-shi, Kanagawa Prefecture Sumitomo Heavy Industries Machinery Co., Ltd. No. 30 Sumitomo Heavy Industries Machinery Co., Ltd. Hiratsuka Plant F-term (reference) 4D058 JA46 JB03 JB05 JB13 JB14 KA01 KA15 MA02 MA11 MA15 MA25 SA01 SA08

Claims (4)

[Claims] 1. A solid-gas separation filter for collecting solid particles contained in an air flow, wherein the solid-gas separation filter is formed by collecting a cord-like filter material in a bundle. Characteristic solid-gas separation filter. 2. The solid-gas separation filter according to claim 1, further comprising a binding member that binds the plurality of filter materials. 3. The solid-gas separation filter according to claim 2, wherein when the binding by the binding member is released, the filter materials can be separated from each other. 4. A housing having an inlet and an outlet for an air flow, and a solid-gas separator disposed in a flow path of the air flow passing through the housing and collecting solid particles contained in the air flow. A solid-gas separation device comprising a filter, wherein the solid-gas separation filter is the solid-gas separation filter according to any one of claims 1, 2, and 3.