JP2590554Y2 - Pre-coating equipment for filter in dust collector - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention is used in the technical field of dust collectors which collect and filter fine and sticky dust or mist, and more specifically, the above-mentioned dust or the like. Filter for collecting mist etc. (Bag filter)
The present invention relates to a filter precoating apparatus for adhering a precoating agent to a filter.

[0002]

2. Description of the Related Art A powdery precoating agent such as calcium carbonate is previously attached to a filter of a dust collector, and harmful gas components such as tar and oil mist contained in a gas are adsorbed on the precoating layer. In this way, clogging of the filter is prevented and harmful gas components are collected (absorbed). Conventionally, as a device for attaching a precoat agent to the filter, for example, Japanese Patent Publication No. As disclosed in JP-A-2603, by injecting high-pressure air from a high-pressure air injection nozzle to a container containing a precoat agent,
There is an apparatus configured so that a pre-coating agent is caused to fly into a dust collecting chamber and adhere to a filter.

[0003]

However, in the above-mentioned conventional apparatus, the high-pressure air injection nozzle is fixed and always injects high-pressure air in a fixed direction. It is possible to soar up the precoat agent effectively, but the part where the injection nozzle is gradually facing, that is, the part where the high-pressure air is directly injected and only the precoat agent near the part disappears, and the injection nozzle is not suitable If the pre-coating agent in the container remains as it is and it is not possible to evenly raise all the pre-coating agents contained in the container, or the amount of the pre-coating agent soared by compressed air is insufficient, There was a problem that the precoat agent could not be sufficiently adhered.

[0004] The above-mentioned problem can be solved by providing a large number of compressed air injection nozzles over the entire container containing the precoat agent. Complicated,
In addition, a large amount of compressed air is required, and equipment such as a compressor for supplying the compressed air needs to be increased in size.

[0005] Therefore, a technical problem of the present invention is to provide a filter in which a pre-coating agent in a container is evenly levitated without leaving a large number of spray nozzles and leaving the pre-coating agent.

[0006]

Means taken by the present invention to solve the above technical problems are as follows. In a dust collector configured to provide a container containing a pre-coating agent in a dust collection chamber in which a filter is suspended, and to fly the pre-coating agent into the dust collection chamber by jetting compressed air to adhere to the filter,

(1) A flexible tube is attached to the end of a pipe for supplying compressed air, and this flexible tube is hung down inside a container containing a precoat agent.

(2) A pre-coating agent is accommodated in a dust collecting bucket housed so as to be drawn out in the inner bottom of the dust collecting chamber, and a flexible tube for injecting compressed air into the bucket is hung down.

[0009]

The above means operates as follows. The above (1)
According to the means described in the above, when compressed air is ejected from the flexible tube through the pipe, the flexible tube operates irregularly in the container with the force of the ejected compressed air, and as a result, in all directions in the container On the other hand, compressed air is sprayed to allow all the precoat agent in the container to fly up evenly and to adhere to the filter reliably.

According to the means described in the above (2), the dust collecting bucket stored in the inner bottom portion of the dust collector can be used as it is as a storage container for the precoat agent, so that a container dedicated to the precoat agent is separately provided in the dust collector. There is no need to provide
As a result, it becomes possible to implement the precoating device easily and at low cost for the dust collector. As described above, the above-described technical problems can be solved by the above-described means, and the problems of the related art can be solved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a filter precoating device in a dust collector according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side sectional view of a pulse jet type dust collector in which a pre-coating device according to the present invention is implemented. In FIG. A dust collecting fan 4 that is rotated by a motor 5M in the clean room 3, and has a dust-containing air suction port 4a. , A plurality of bag filters 8 are suspended from the partition plate 2,
Suction port 4a receiving suction force due to rotation of dust collection fan 5
The dust-containing air sucked into the dust collection chamber 4 is
.., Dust and mist are collected and filtered, and then discharged through the clean room 3 to the outside of the machine.

Further, in the drawing, reference numeral 7 denotes a blow-pipe for backwashing which is laid horizontally in the above-mentioned cleaning chamber 3. The compressed air sent to the filter is blown into the venturi pipes 8a attached to the upper ends of the filters 8 by the injection nozzles 7a, and the pressure of the blown compressed air causes the surface of each filter 8 to be blown. The mechanism is such that dust and mist adhering are removed and collected in the lower dust bucket 10.

Next, the compression pipe 9 has an upper end connected to the above-mentioned header pipe 6 through a valve 6b, and a lower end inserted into the body 1 to be positioned above the above-mentioned dust bucket 10. An air supply pipe 11 is a flexible tube attached to a distal end 9a of the compressed air supply pipe 9. For example, the lower end of the tube 11 which is entirely made of rubber or synthetic resin is shown in the drawing. As described above, it is hung inside the dust bucket 10 described above.

PC is a pre-coating agent contained in the above-mentioned dust bucket 10 which is retractably stored in the inner bottom portion of the machine body 1, and 8b is a filter gauge attached to each filter 8.

The pre-coating device for the filter in the dust collector according to the present invention is configured as described above. In operating the dust collector, first, the pre-coating agent PC is housed inside the dust bucket 10, and then the dust collecting device PC is collected. The dust fan 5 is rotated to perform a dust collection operation, and the valve 6 b is opened to supply compressed air to the flexible tube 11 through the supply pipe 9.
Inject more into the dust bucket 10.

Then, as shown in FIG. 2, the flexible tube 11 is moved by the force of the compressed air to be blown out.
In this case, compressed air is sprayed in all directions in the dust bucket 10 and the precoat agent PC stored in the dust bucket 10 is uniformly distributed. So that it can be attached to the filters 8.

When the precoating operation is completed in this way, the valve 6b is closed and the supply of compressed air to the supply pipe 9 is stopped. It can be attached and collected on the precoat layer.

[0018]

As described above, according to the filter pre-coating device in the dust collector according to the present invention, the flexible tube can be simply attached to one supply pipe without providing a large number of compressed air injection nozzles. With the extremely simple structure of the above, all the pre-coating agents can be evenly levitated without leaving them and adhere to the filter, and the pre-coat layer can be securely adhered to the filter surface.The dust bucket is a storage container for the pre-coating agent. In addition to the point that the present invention is economical to use as it is, it can be applied to various kinds of dust collectors such as the pulse jet type dust collector as shown in the figure, and is very practical.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a dust collector in which a precoating device according to the present invention is implemented.

FIG. 2 is a cross-sectional view of a main part of the dust collector, showing a state where a precoat agent is sowed by compressed air injected from a flexible tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust collector body 4 Dust collection chamber 8 Filter 9 Compressed air supply pipe 10 Dust bucket 11 Flexible tube PC Precoat agent

Claims (2)

(57) [Scope of request for utility model registration] 1. A dust collector, wherein a container containing a pre-coating agent is provided in a dust-collecting chamber in which a filter is suspended, and the pre-coating agent is soaked into the dust-collecting chamber by jetting compressed air to adhere to the filter. A pre-coating device for a filter in a dust collector, wherein a flexible tube is attached to a distal end of a pipe for supplying compressed air, and the flexible tube is hung inside a container containing a pre-coating agent. 2. A pre-coating agent is housed inside a dust collecting bucket housed so as to be able to be pulled out at an inner bottom portion of a dust collecting chamber,
2. A pre-coating device for a filter in a dust collector according to claim 1, wherein a flexible tube for injecting compressed air is hung in the bucket.