JP3408960B2 - Pre-coating device for dust filter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of dust collectors for collecting and filtering fine dust and mist, etc. Filter that collects mist etc. (Bug filter)
The present invention relates to a precoat device for a dust collecting filter, which is capable of forming a precoat layer by attaching a precoat agent to the precoat layer.

[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 the gas are adsorbed to the precoating layer. By
It has been conventionally practiced to prevent clogging of filters and to collect (absorb) harmful gas components at the same time.
As a device for adhering the precoat agent to the filter, for example, as disclosed in Japanese Patent Publication No. 2-2603, by injecting high pressure air from a high pressure air injection nozzle into a container containing the precoat agent, There is a device configured so that the precoat agent is raised in the dust collecting chamber and attached to the filter.

However, in the above-mentioned conventional apparatus, the high-pressure air jet nozzle is fixed and the high-pressure air is always jetted only in a fixed direction. Therefore, the pre-coating agent is effective at the beginning of the pre-coating work. It is possible to lift up to, but the part where the injection nozzle is gradually facing, that is, only the part where the high pressure air is directly injected and the precoating agent in the vicinity thereof disappears, and the precoating agent of the part where the injection nozzle is not facing is removed. It is left as it is, and it is not possible to evenly raise all the precoating agents contained in the container, and furthermore, the amount of precoating agent that is blown up by the compressed air is insufficient, and the precoating agent is sufficiently applied to the filter. There was a problem that it could not adhere.

The above-mentioned problem can be solved by providing a large number of compressed air jet nozzles over the entire container containing the precoat agent. Complicated,
In addition, a large amount of compressed air is required, and a device such as a compressor that supplies the compressed air also needs to be upsized, which causes a problem of increasing cost.

Therefore, the present applicant has filed Japanese Patent Application Laid-Open No. 6-45616.
As can be seen in the publication, by attaching a flexible tube to the injection port of a pipe for injecting compressed air, the flexible tube is randomly violently operated in all directions in the precoat agent accommodating container by the force of the compressed air to be ejected. We have developed a precoat device for filters, which is constructed so that compressed air can be sprayed evenly on all sides of the container for storing the precoat agent, and the precoat agent in the container can be reliably and evenly lifted up.

[0006]

However, although the above-mentioned conventional precoating device can lift up the precoating agent in the container, the precoating agent thus raised is effective for the filter by putting it on the air stream of dust-containing air. However, there is a problem in that some of the pre-coating agent cannot be adhered reliably, and some of the pre-coating agent does not adhere and falls as it is to return to the inside of the container.

Therefore, a technical object of the present invention is to effectively scatter the precoat agent in the precoat agent accommodating container with a relatively simple device, and to surely attach the scooped precoat agent to the filter. .

[0008]

[Means for Solving the Problems] Means taken in the present invention for solving the above technical problems are as follows.

A pre-coating agent storage container containing a pre-coating agent is provided inside a dust-collecting chamber equipped with a filter, and the pre-coating agent is blown up into the dust-collecting chamber by the injection of compressed air so that the pre-coating agent can be carried on the dust-containing air stream to the filter. A precoat device for a dust collecting filter configured to adhere,

(1) A rectifying chamber made of a punch plate is provided inside the suction port for sucking the dust-containing air into the dust collecting chamber by the rotation of the fan, and the dust-containing air outlet provided in the rectifying chamber is used as a precoat agent. The opening should be directed toward the storage container, and the inner bottom surface of the precoating agent storage container should be curved downward in a substantially arcuate shape with the inner bottom surface being along the outflow direction of the dust-containing air. (Claim 1)

(2) The outlet of the dust-containing air provided in the rectifying chamber should be opened in a slit-like state over substantially the entire width of the precoat agent container. (Claim 2)

(3) A flexible tube is connected to the injection port of the compressed air supply pipe for injecting compressed air toward the precoat agent storage container. (Claim 3)

According to the means of claim 1 described in the above (1), the precoat agent contained in the precoat agent container can be blown up into the dust collecting chamber by the injection of compressed air. In the relationship that the inner bottom surface of the precoat agent storage container is curved in a substantially arc shape, the precoat agent is extremely effectively put on the air flow of the dust-containing air flowing into the container from the outlet of the flow straightening chamber, and It is possible to fly up completely without leaving the pre-coating agent on, and to put the soaked up pre-coating agent on the air flow to surely attach it to the filter.

According to the second aspect of the invention described in (2) above, the dust-containing air is directed toward the inner bottom portion of the precoating agent storage container, and even if it is slightly slit-shaped over the width of the container. In order to forcefully flow out from the narrowed outlet, jetting compressed air and riding on this flow of dust-containing air, the precoat agent from the container for precoat agent rises up into the dust collection chamber without leaving any residue.
Allows efficient attachment to the filter.

According to the third aspect of the invention described in (3) above, when the compressed air is ejected from the flexible tube through the supply pipe, the flexible tube irregularly violates in the container due to the force of ejecting the compressed air. As a result, compressed air is sprayed in all directions in the container, so that all the precoat agents in the container can be evenly flowed and reliably adhered to the filter, and a large precoat agent can be stored. Even in a container, the precoat agent can be surely flown up with a relatively low velocity airflow, so that the pressure loss due to dust-containing air can be suppressed to a minimum, and the injection air also has a minimum amount of air. Allows you to do with pressure.

As described above, the above (1) to
By solving the above-mentioned technical problem by the means of (3),
It is possible to solve the problems of the conventional technology.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a precoating apparatus for a dust collecting filter according to the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view of a dust collector equipped with the precoating apparatus of the present invention, and FIG. 1 is a plan sectional view taken along line XX of FIG. 1, in which 1 is a body of a dust collector and 2 is an inside of the body 1 of a cleaning chamber 2A and a dust collecting chamber 2B. The horizontal partition plate which divides into upper and lower 2 chambers is shown.

On the clean room 2A side, a fan 5 rotated by a motor M and a fan room 5 accommodating the fan 5 are installed.
a and a partition plate 6 for partitioning the fan chamber 5a and the clean chamber 2A
And a blow tube 4 for injecting compressed air for dust removal from the filter from its ejection port 4a ...
And a clean room 2A is provided at the center of the partition plate 6.
A communication hole 6a communicating with the fan chamber 5a is opened, and an exhaust port 7a of an exhaust duct 7 is opened in the fan chamber 5a.

Further, filters 3 for collecting dust are attached to the dust collecting chamber 2B in a state of being suspended from the partition plate 2, and the dust collecting duct 9 (is provided on one side of the dust collecting chamber 2B. (See FIG. 2), the suction port 9a is opened, and the storage chamber 8 on the bottom is formed.
In H, a precoat agent storage container 8 in which the precoat agent DS is stored is stored in a freely drawable manner.

The container 8 for storing the precoat agent collects the dust and precoat agent blown off from each filter by the compressed air (pulse jet) jetted from the blow tube 4 for removing dust, and the suction port 9a described above.
Which also serves as a dust bucket for collecting dust that has fallen by its own weight after flowing in from the inside, and its inner bottom surface 8a
As shown in the drawing, is curved downward in a substantially arcuate cross section (substantially semicircular shape).

Reference numeral 8c is a compressed air supply pipe, and 8P and 8P.
Are solenoids 8b and 8 for the supply pipe 8c, respectively.
The injection pipes 8P, 8P, which are connected through b, are connected to the precoat agent storage container 8 as shown in the drawing.
Are laid horizontally on the upper side of each of the injection ports 8Pa ..., The flexible tubes 8T ... Made of rubber or synthetic resin are provided on each of the injection ports 8Pa. Is connected so as to be in contact with the inner bottom surface 8a.

Similarly, in FIG. 1 and FIG. 2, reference numeral 10 respectively
Shows a rectifying device provided inside the dust collecting chamber 2B and inside the suction port 9a.
As is clear from the perspective view shown in FIG. 3, this rectifying device 10 is installed inside the suction port 9a by installing rectifying plates 10a at intervals in parallel with the inner wall surface of the dust collecting chamber 2B. While forming 10T, a large number of punch holes 10H are formed inside the rectifying chamber 10T so as to face the suction port 9a.
One or a plurality of baffle plates 10c having a lower end opening structure made by using a punch plate having a hole formed therein are attached, and the rectifying plate 1 is provided.
At the lower end of 0a, the direction opposite to the inner wall of the dust collection chamber 2B, that is,
An inclined plate 13 that gradually inclines toward the lower precoat agent storage container 8 is continuously provided, and a guide plate 14 that inclines parallel to the inclined plate 13 is attached to the inner wall surface of the dust collection chamber 2B. Composed by.

Then, the inclined plate 13 and the guide plate 14 described above are used.
Thus, the dust-containing air having a structure in which the bottom surface of the rectifying chamber 10T is inclined downward in a state of being directed toward the inside of the precoat agent storage container 8 and the mouth is narrowed slightly in a slit shape over the entire width of the container 8 The outlet 13a is opened, and the inner bottom surface 8a of the precoating agent storage container 8 is moved downward as shown in FIG. 1 along the outflow direction of the dust-containing air flowing out from the outlet 13a. The curved surface is formed to have a substantially arcuate cross section.

Further, in the figure, 10b is a ceiling plate of the rectifying chamber 10T, and 11 is a guide provided at the inlet of the rectifying chamber 10T so as to guide the dust-containing air flowing in from the suction port 9a into the rectifying chamber 10T. A plate, 12 is a partition plate that partitions the tip of the flow regulating chamber 10T from the dust collecting chamber 2B, and 14a is a lower edge of the guide plate 14.

The precoating apparatus for a dust collecting filter according to the present invention has the above-described structure. In operation, first, the precoating agent DS is stored in the precoating agent storage container 8, and then the fan 5 is rotated. Then, the dust collecting operation is performed, and the valve 8b is opened to inject the compressed air through the injection pipe 8P into the precoat agent container 8 through the flexible tubes 8T.

As a result, the flexible tubes 8T ... Roughly move in all directions inside the precoat agent accommodating container 8 with the force of ejecting the compressed air, and the compressed air can be ejected in all directions inside the container 8. Therefore, the precoat agent DS can be all evenly raised.

In addition, according to the present invention, the outlet 13a for the dust-containing air in the flow regulating chamber 10T is opened in a slit shape over the substantially entire width of the precoat agent accommodating container 8 while being slightly narrowed.
Since the inner bottom surface 8a of the precoat agent storage container 8 is curved downward in a substantially arcuate shape in a state of being aligned with the flow direction of the dust-containing air flowing out from the outflow port 13a, it is included. Dust air is efficiently flowed toward the inside of the precoat agent storage container 8, and the flexible tube 8
The precoat agent DS can be reliably blown up in cooperation with T. Further, the precoated agent DS raised above can be effectively attached to each filter 3 by being put on the flow of dust-laden air. , A precoat layer can be formed on the surface of each filter 3.

When the precoating work is completed in this way, the valve 8b is closed to stop the supply of compressed air to the injection pipe 8P, and thereafter, the dust, mist, etc. of each filter 3 ... Attached to the precoat layer,
Can be collected.

[0029]

As described above, according to the pre-coating apparatus for a dust collecting filter of the present invention, all the pre-coating agents stored in the pre-coating agent storage container are efficiently flown,
In addition, the flying precoat agent can be effectively attached to the filter by being placed on the dust-containing air current, and the precoat layer can be formed on the surface of the filter in a relatively short time. In addition to providing the advantages, the dust-containing air is used to fly up the precoating agent, and the inner bottom surface of the precoating agent storage container is formed into a curved shape suitable for flying up. It has the advantage of being able to hold down to a minimum and also the pressure loss of dust-containing air to a minimum, and is suitable for use in pulse jet dust collectors as shown in the drawing. Is.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view illustrating the internal structure of a pulse jet type dust collector provided with a precoat device for a dust collecting filter according to the present invention.

FIG. 2 is a plan sectional view taken along line XX of FIG.

FIG. 3 is a perspective view illustrating a configuration of a rectifying device.

[Explanation of symbols]

1 Dust collector body 3 Filter 5 Fan 8 Precoat agent storage container 8a Inner bottom surface 8P Injection pipe 8Pa Injection port 8T Flexible tube 9a Dust-containing air suction port 10 Rectification device 10T Rectification chamber 13a Slit-like outlet DS Precoat agent

─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-9-108518 (JP, A) JP-A-62-163721 (JP, A) JP-A-10-296026 (JP, A) JP-A-8- 108026 (JP, A) Actual flat 6-45616 (JP, U) Actual flat 7-37311 (JP, U) Actual 60-112332 (JP, U) Actual flat 7-39915 (JP, U) Actual Public Sho 64-6905 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 46/02

Claims (3)

(57) [Claims] 1. A pre-coating agent storage container containing a pre-coating agent is provided inside a dust-collecting chamber equipped with a filter, and the pre-coating agent is blown up into the dust-collecting chamber by jetting compressed air so that the pre-coating agent can be placed in a dust-containing air stream. A precoat device for a dust collecting filter configured to be attached to a filter, wherein a straightening chamber made of a punch plate is provided inside a suction port that sucks dust-containing air into the dust collecting chamber by rotation of a fan. The outlet for the dust-containing air provided in the opening is opened toward the precoating agent storage container, and the inner bottom surface of the precoating agent storage container is oriented downward along the outflow direction of the dust-containing air into a substantially arc-shaped cross section. A precoating device for a dust collecting filter characterized by being formed in a curved shape. 2. The dust collecting apparatus according to claim 1, wherein the dust-containing air outlet provided in the rectifying chamber is opened in a slit-like state over substantially the entire width of the precoating agent storage container. Precoating device for filters. 3. A flexible tube is connected to an injection port of a compressed air supply pipe for injecting compressed air toward a precoat agent accommodating container.
Precoat device for the dust collecting filter described above.