JPH10309421A - Bag filter type dust collecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To get rid of troubles of installation work for a jetting pipe and lower the cost. SOLUTION: This bag filter type dust collecting apparatus 1 has a structure in which a large number of bag filters B are hung in a partitioning wall 3 which partitions a dust-containing air chamber 5 and a purified air chamber 4, so that dust-containing air can be filtered by the bag filters B. In this case, a back-washing mechanism 10 to blow pneumatic air for back-washing to the bag filters B is installed and the back-washing mechanism 10 is provided with a pneumatic air jetting pipe 11 comprising nozzles 12 for respective rows of the bag filters B and a pulsed air supplying member 13 for successively supply pulsed pneumatic air for respective nozzles of the pipe 11. The pneumatic air jetting pipe 11 and the pulsed air supplying member 13 are installed in the purified air chamber 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag filter type dust collecting apparatus, and more particularly to a back washing mechanism in which a nozzle for blowing back pressure air is provided opposite to a bag filter, and a pressure air to the nozzle is jetted in a pulsed manner. The present invention relates to a bag-filter type dust collecting device provided with:

[0002]

2. Description of the Related Art FIGS. 6 to 8 schematically show a conventional bag filter type dust collector provided with the above-mentioned backwashing mechanism. In the bag filter type dust collector 50, the inside of the housing 51 is vertically divided by a partition wall 52, the upper chamber is a purified air chamber 53, the lower chamber is a dust-containing air chamber 54, and the outlet of the purified air chamber 53 is Connect to an appropriate suction fan F. The dust-containing air chamber 54 has a dust-containing air intake 56 connected to a dust-containing air generating source (not shown) such as an incinerator or the like, opened laterally, a funnel shape below, and a rotary valve RV at the lower end. Provide.

[0003] A large number of cylindrical bag filters B having bottoms are attached to the partition wall 52 in a hanging manner, and a venturi tube 57 is attached to the opening at the top of the bag filter. This bag filter B is divided into a plurality of rows (10 rows in the figure) and a plurality of rows (7 rows in the figure), and the ejection pipes Pa and P are provided for each row.
b, Pc, Pd... (hereinafter, simply referred to as P) are provided facing each other, and a jet nozzle N is attached to each of the jet pipes P with respect to the Venturi pipe 57. Is connected to a pressure air supply pipe S via a pulse air supply member such as an electromagnetic switch ER.

[0004] The electromagnetic switch ER is a bag filter B.
When the filtration resistance applied to the filter reaches a predetermined value, the bag filter B is sequentially opened and closed based on a preset program to supply pressurized air to the ejection pipe P in a pulsed manner to backwash the bag filter B.

[0005]

The electromagnetic switch ER and the pressure air supply pipe S are usually arranged outside the housing 51,
Each ejection pipe P penetrates the housing 51 and is attached. However, it is necessary to maintain the negative pressure in the purified air chamber 53, and it is necessary to keep the ejection pipe P confidential to the housing 51. FIG. Reference numeral 60 denotes a mounting socket to be inserted into a mounting hole of the housing 51. The mounting socket penetrates the ejection pipe P, and the socket 60 needs to be welded M1 to the housing 51 and to the welding M2 to both the socket 60 and the ejection pipe P. is there. However, there is a problem that this mounting and welding are extremely troublesome. In view of the above, an object of the present invention is to omit the above-mentioned steps for airtightly attaching the ejection pipe, thereby reducing the cost.

[0006]

In order to achieve the above object, a bag filter type dust collecting apparatus of the present invention hangs a large number of bag filters on a partition wall separating a dust-containing air chamber and a purified air chamber. In a bag-filter type dust collecting apparatus for guiding dust-containing air into a dust-containing air chamber, filtering the same through a bag filter, and discharging the filtered air to the outside through a purified air chamber, the bag filter is provided with a backwashing pressure air blowing nozzle. Equipped with a backwash mechanism,
The backwashing mechanism includes a pressure air ejection pipe provided with the blowing nozzle for each row of the bag filter, and a pulse air supply member for sequentially supplying pressure air to each pipe in a pulsed manner. A pipe and a pulse air supply member are provided in a purified air chamber.

In the bag filter type dust collecting apparatus of the present invention having the above-mentioned structure, the conventional pressure air ejection pipe is securely mounted on the housing by providing the pulse air supply member together with the pressure air ejection pipe in the purified air chamber. The trouble can be omitted.

According to a second aspect of the present invention, the purified air chamber is divided into two chambers by a partition wall, one of which is a main purified air chamber to which a bag filter is attached, and the other is a sub-purified air chamber which houses a pulse air supply member. A pressure air ejection pipe connected to the supply member is disposed in the main purification chamber through the partition wall, and a manhole is securely mounted above the sub purification air chamber.

According to the present invention having the above-described structure, the pulse air supply section is housed in the sub-purification air chamber which is separated from the main purification air chamber to which the bag filter is attached, so that the odor can enter the sub-purification chamber during operation. Does not allow high-temperature treated air to flow,
Workers can enter from the manhole.

[0010]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. In this dust collecting device 1, the inside of a housing 2 is vertically divided by a partition wall 3 as in a conventional example, and an upper chamber is defined as a purified air chamber 4, a lower chamber is defined as a dust-containing air chamber 5, and a dust-containing air chamber 5 is formed. On one side, an introduction port 6 connected to the dust-containing air introduction duct D is opened, and a number of bag filters B are attached to the partition wall 3 in a hanging manner. Reference numeral 7 denotes a Venturi tube attached to the upper part of the bag filter B. This bag filter B has a plurality of rows (10 in the figure) and a plurality of rows (7 in the figure).
Column).

Reference numeral 10 denotes a backwashing mechanism for blowing backwashing pressure air into the bag filter 8, and the backwashing mechanism 10 includes a pressure air jet pipe 11a having a blowing nozzle 12 for each row of bag filters. , 11b, 11c,... (Hereinafter, simply referred to as 11) and a pulse air supply member 13 for sequentially supplying pressure air to each of the tubes in a pulsed manner. The pulsed air supply member 13 includes an electromagnetic switch ER and a pressure air supply pipe S attached to the base end of each pressure air ejection pipe 11. The other parts are the same as those of the conventional example. The supply duct 14 connected to the pressurized air supply pipe S penetrates the socket 15 attached to the housing 2 and is kept secret by welding.

In the above configuration, when the filtration resistance applied to the bag filter B reaches a predetermined value, as is well known, the electromagnetic switches ER are sequentially opened and closed based on a preset program, and compressed air is supplied to the compressed air ejection pipe 11. It is supplied in a pulsed manner to backwash the bag filter B.

Next, FIGS. 3 to 5 show a second embodiment. This bag filter type dust collector 20 is provided with the above-described purified air chamber 4.
Is divided into two chambers by a partition wall 21, one chamber 4a is a main purified air chamber to which the bag filter B is attached, and the other chamber 4b is a sub-purified air chamber.
3 which house the electromagnetic switch ER and the pressurized air supply pipe S, and connect each pressure air blow-out pipe 11 connected to each electromagnetic switch ER to the other main purified air chamber 4a through the partition wall 21. It is arranged on the side. 22 is a sub purification air chamber 4
b indicates the manhole provided, and is mounted airtight. Other structures are the same as those of the previous example, and the same components are denoted by the same reference numerals and description thereof will be omitted.

The purified air chamber 4 formed by the partition wall 21
Is divided into two chambers, the purified air is also at a high temperature during operation, and it is difficult for an operator to enter the purified air chamber for checking the pulse air supply member 13 or the like. For this reason, a chamber for accommodating the electromagnetic switch ER is partitioned, and a packing 23 is attached to a part of the partition wall 21 through which the compressed air jet pipe S penetrates as necessary, but confidentiality is not necessarily required.

[0015]

As described above, according to the present invention, in a bag filter type dust collecting apparatus, the bag filter is provided with an ejection pipe provided with a backwashing pressure air blowing nozzle, and the compressed air is supplied thereto in a pulsed manner. By providing the pulsed air supply member for supplying the air to the purified air chamber, it is possible to eliminate the drawback that it takes time to produce confidentiality by penetrating the housing with a large number of pressure air ejection pipes of the conventional backwash mechanism, Cost reduction can be measured. According to the second invention,
The purifying air chamber is divided into two chambers by a partition wall, one of which is a main purifying air chamber to which a bag filter is attached, and a pulse air supply member, that is, an electromagnetic switch is housed in the other sub-purifying chamber.
By arranging the pressurized air ejection pipe in the main purification air chamber through which the partition wall is attached and the bag filter is attached, heated air does not flow into the sub-purification chamber, and thus the sub-purification chamber is kept in operation even during operation. You can work inside the purification chamber.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a bag filter type dust collecting apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view of the purified air chamber along the line XX in FIG.

FIG. 3 is a longitudinal sectional view of a bag filter type dust collector according to a second embodiment of the present invention.

FIG. 4 is a plan view of the purified air chamber along the line YY in FIG. 3;

FIG. 5 is an enlarged explanatory view of a U portion in FIG. 4;

FIG. 6 is a longitudinal sectional view of a conventional bag filter type dust collector.

FIG. 7 is a plan view of the purified air chamber along the line ZZ in FIG. 6;

FIG. 8 is an enlarged explanatory view of a portion V in FIG. 6;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 bag filter type dust collector 3 partition wall 4 purified air chamber 5 dust-containing air chamber 10 backwashing mechanism 11 pressure air ejection pipe 12 nozzle 13 pulse air supply unit 20 bag filter type dust collector 21 partition wall B bag filter ER electromagnetic opening and closing vessel

Claims (2)

[Claims] 1. A large number of bag filters are hung on a partition wall that separates a dust-containing air chamber and a purified air chamber, and the dust-containing air is guided to the dust-containing air chamber, filtered by the bag filter, and externally passed through the purified air chamber. A bag filter type dust collecting device, wherein a back-washing mechanism is provided opposite to the bag filter, and a back-washing mechanism is provided for each row of the bag filters. A pressure air ejection pipe provided with a nozzle, and a pulse air supply member for sequentially supplying pressure air to each of the pipes in a pulsed manner, wherein the pressure air ejection pipe and the pulse air supply member are provided in a purified air chamber. Bag filter type dust collector. 2. The purifying air chamber is divided into two chambers by a partition wall, one of which is a main purifying air chamber to which a bag filter is attached, and the other is a sub-purifying air chamber for accommodating a pulse air supply member. 2. A bag filter type dust collecting apparatus according to claim 1, wherein a series of pressure air ejection pipes are disposed in the main purification chamber through the partition wall, and a manhole is securely mounted above the sub purification air chamber. apparatus.