JPH11156128A - Retainer for bag filter type dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong a cycle for replacement because of excellent corrosion resistance by a method wherein a frame material formed cylindrically in order to support a filter fabric. SOLUTION: A frame material 3 is composed of vertical wire materials 2a wherein a plurality of wires are arranged so as to form mutually cylindrically in order to support a filter cloth, and a plurality of ring-like connection wire materials 2b connecting the vertical wire materials 2a, and the vertical wire materials 2a and the ring-like connecting members 2b are integrally cylindrically fixed by welding at their contact points. The wire material 2 forming the frame material 3 is formed with galvanized or stainless steel wire and the surface is covered with specially modified polyester-based coating to form a protective layer 12. The specially modified polyester-based coating is a coating material consisting of specially modified polyester copolymer, excellent in heat resistance, and excellent in corrosion resistance. Corrosion resistance of a retainer is improve, and its cycle for replacement can be prolonged, and a maintenance cost can be reduced.

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 collector, and more particularly to a bag filter type dust collector retainer for supporting a filter cloth for filtering dust and the like.

[0002]

2. Description of the Related Art Generally, in a bag-filter type dust collector that performs backwashing using a pulse jet, a retainer having a frame structure is provided inside a filter cloth sewn in a bag shape to support the filter cloth.

This bag filter type dust collector retainer has a cylindrical frame member formed by joining a plurality of wires such as steel wires so that a gas containing dust can be filtered from the outside to the inside of the filter cloth. Is provided. In addition, it is arranged along the vertical direction so that dust adhering to the outer surface of the filter cloth can be removed by a pulse jet injected inside the filter cloth. Specifically, it is composed of vertical wires extending in the vertical direction provided in a cylindrical shape with each other, and ring-shaped connecting wires connecting the vertical wires to each other.

At present, galvanized steel wires, stainless steel wires and the like are mainly used as the metal material used for the frame material of the retainer.

[0005]

However, bag filter type dust collectors are used in various atmospheres under various types of exhaust gas, temperature, humidity, etc., and galvanized steel wire or stainless steel wire is used for the frame material. When used, the retainer was corroded and damaged in a very short period of time, depending on the use condition, and the damaged wire rod penetrated the filter cloth, resulting in a hole in the filter cloth. Therefore, there has been a problem that the replacement cycle of the retainer is short and maintenance cost is high.

Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to provide a bag filter type dust collector retainer which is excellent in corrosion resistance and can lengthen a replacement cycle. It is in.

[0007]

In order to solve the above-mentioned problems,
According to the present invention, in a retainer for a bag filter type dust collector having a cylindrical frame member formed to support a filter cloth, the frame member is coated with a specially modified polyester paint.

Preferably, the frame material is formed by joining a plurality of wires to each other, and then dipped in the special modified polyester-based paint tank to cover the coating material, thereby forming a protective layer.

[0009] According to the above structure, the frame material is coated with a specially modified polyester paint having excellent heat resistance and low temperature characteristics, so that the bag filter type dust collector having high corrosion resistance to salt, alkali, acid and heat. Since the retainer can be formed, its life can be extended and the replacement cycle can be lengthened. In addition, since the frame material is immersed in the paint tank and covered with a coating to form a protective layer, a predetermined protective layer thickness can be uniformly secured, and also at a joint between wires. , Can be reliably applied.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, the structure of the bag filter type dust collector retainer according to the present invention will be described.

FIG. 1 is a plan view, a side view and a horizontal sectional view showing a retainer for a bag filter type dust collector according to the present invention.

As shown in FIG. 1, the retainer 1 for a bag filter type dust collector includes a partition plate 4 serving as a partition wall of the dust collector.
And a frame member 3 which is suspended and fixed to the lower surface of the base member 6 and formed by joining a plurality of wires 2 such as steel wires into a cylindrical shape. .

In order to support the filter cloth, a plurality of frame members 3 are provided so as to form a cylindrical shape and extend in the vertical direction.
a and a plurality of ring-shaped connecting wires 2b connecting these vertical wires 2a. The vertical wire 2a and the ring-shaped connecting member 2b are welded at their contact points and integrally fixed in a cylindrical shape.

The base 6 has a ring-shaped flat plate 7 having an outer diameter larger than that of the opening 5 of the partition plate 4.
The cylindrical body 11 fitted to the opening 5 is fixed to the lower surface of the ring-shaped flat plate 7. In addition, a cylindrical gas discharge portion 9 extending downward from the opening 8 of the ring-shaped flat plate portion 7 is provided. The gas discharge portion 9 is formed so as to have a diameter reduced upward.
It is designed to promote gas flow.

The frame member 3 is fixed to the base 6 by welding the upper end of each vertical wire member 2a along the inner periphery of the cylindrical body portion 11.

In the present invention, the wire 2 forming the frame member 3 is formed of galvanized or stainless steel wire, the surface of which is coated with a specially modified polyester paint, and the protective layer 12 is formed. It is characterized by being. In the drawing, a portion indicated by a dashed line indicates the protective layer 12.

The specially modified polyester paint is a one-part coating material composed of a copolymer of a specially modified polyester. Specifically, a PermaShield (Hertz Chemical Co., Ltd.) is used. It was done.

The above-mentioned perm shield has a melting point of 343 ° C.
It is excellent in heat resistance and also in corrosion resistance.

When the wire 2 is coated with the above-mentioned specially modified polyester paint, the wire 2 is integrally formed as a frame material 3 and fixed to a base 6 by welding.
After removing dirt and dust, the frame material 3 is immersed in a paint tank (not shown) in which the perm shield is stored, and is integrally coated with paint to form the protective layer 12. . The surface of the protective layer 12 is dried by natural drying. The drying time is appropriately set according to the temperature and the humidity. When the thickness of the protective layer 12 is increased to reinforce the protective layer 12, it is necessary to repeat the process of drying and then immersing the coating layer in the paint tank several times and drying it by natural drying. Good.

Next, the operation of the bag filter type dust collector retainer 1 will be described.

To use the bag filter type dust collector retainer 1 having the above configuration, the bag filter type dust collector retainer 1 is inserted into the inside of a bag-shaped filter cloth, and the upper end of the filter cloth is separated from the partition plate. 4 between the opening 5 and the base 6. Then, dust and the like are filtered through the filter cloth by passing the gas containing the dust from the outside to the inside of the filter cloth. When performing backwashing, the filter cloth is cleaned by removing dust adhering to the outer surface of the filter cloth by a pulse jet injected into the filter cloth.

When the filtration is performed as described above, there are various usage situations. For example, when the filtration is performed in a coal drying facility or the like, the sulfur component is contained in the coal, and the conventional bag filter is used. Although it was very severe for the retainer for a dust collector of the type, as in the case of the retainer 1 for a bag filter type dust collector, the frame 3 was coated with a special modified polyester-based paint so that the heat It has excellent low-temperature characteristics, and has strong corrosion resistance to salt, alkali, acid and heat, and can extend the life of the bag filter type dust collector retainer 1. Therefore, the replacement cycle can be lengthened, and maintenance costs can be reduced.

Also, since the protective layer 12 is formed by coating the paint by dipping the frame material in the paint tank, a predetermined thickness of the protective layer 12 can be ensured uniformly, and the wire rods can be fixed. The coating can be reliably applied to the joints without any coating leakage. Further, generation of air bubbles in the protective layer 12 can be prevented, and the corrosion resistance can be improved.

In the above embodiment, the frame material 3
Is covered only with the above-mentioned paint.
The entire retainer 1 for a bag filter type dust collector including the above may be immersed in a paint tank, and the whole may be integrally coated with paint to form the protective layer 12.

[0026]

In summary, according to the present invention, the excellent effects of improving the corrosion resistance of the bag filter type dust collector retainer, lengthening the replacement cycle thereof, and reducing maintenance costs can be obtained.

[Brief description of the drawings]

1 (a) is a plan view, FIG. 1 (b) is a side view showing a retainer for a bag filter type dust collector according to the present invention.
(C) is a horizontal sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Retainer for bag filter type dust collectors 2 Wire rod 3 Frame material 12 Protective layer

Claims (2)

[Claims] 1. A bag filter type dust collector retainer having a tubular frame formed to support a filter cloth, wherein the frame is coated with a specially modified polyester paint. Retainer for bag filter type dust collector. 2. The protective layer according to claim 1, wherein the frame material is formed by bonding a plurality of wires to each other, and then dipped and coated in the specially modified polyester-based paint tank to form a protective layer. Retainer for bag filter type dust collector.