JP2002260466A - Insulator for electric dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulator for an electric dust collector, which can surely prevent penetration of gas, dust and so on into a device housing. SOLUTION: In the insulator for an electric dust collector in which a hollow part 17 including an opening at the lower end of the insulator 15 is formed and a vent 18 is formed in a ceiling wall 15a of the hollow part, and high pressure air is introduced from the hollow part of the insulator into the device housing through the vent, thereby preventing penetration of gas, dust and so on in the device housing into the hollow part of the insulator, a flow regulating means 19 for regulating the air flow is arranged directly underneath the vent 18 of the hollow part 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulator for an electrostatic precipitator, and more particularly, to an electric precipitator in which high-pressure air is introduced from a hollow portion of the insulator into a device housing through a hole formed in the insulator. The present invention relates to an insulator for a dust device.

[0002]

2. Description of the Related Art An electrostatic precipitator has a processing gas inlet and a purifying gas outlet on opposing side walls of an apparatus housing, and a main part of the precipitator having a discharge electrode, a dust collecting electrode, and the like therebetween. Is housed. An insulator storage case is installed on the upper surface of the ceiling wall of the device housing, and the insulator is installed in the case. A core wire is inserted through the center of the insulator, and a lower portion of the core wire is connected to the discharge electrode, whereby the discharge electrode is held in the apparatus housing.

In such an electric precipitator, when gas, dust or the like in the housing of the device flows into the insulator, the dust or the like adheres to the insulator and causes a failure such as a decrease in insulation. .

Therefore, in such an electrostatic precipitator, as shown in FIG. 5, a ventilation hole 2 is formed in a ceiling wall 1a of an insulator 1, high-pressure air is introduced into an insulator storage case 3, and the high-pressure air is introduced into the case. By injecting air into the apparatus housing 4 from the ventilation holes 2, gas, dust and the like in the apparatus housing 4 are prevented from entering the insulator 1.

[0005]

However, in the conventional insulator, high-pressure air flowing into the insulator 1 generates a vortex 6 in the stool 5 as shown in FIG. In some cases, dust may be caught in the insulator 1.

The present invention has been made in view of such circumstances, and has as its object to provide an insulator for an electric precipitator in which gas and dust in an apparatus housing are reliably prevented from entering the insulator.

[0007]

According to the present invention, in order to achieve the above object, in the insulator for an electric precipitator according to the first aspect of the present invention, a hollow portion opened at a lower end is formed inside the insulator. A ventilation hole is formed in the ceiling wall of the hollow portion, high-pressure air is introduced into the hollow portion of the insulator through the ventilation hole, and the high-pressure air is ejected into the device housing, thereby causing gas, dust, etc. in the device housing. In the insulator for an electric precipitator that prevented the insulator from entering the hollow portion, the insulator was provided directly below the ventilation hole.
A rectifying means for dispersing the air flow is provided.

According to the present invention, the high-pressure air introduced into the insulator is guided into the housing as a laminar flow.

Further, in the insulator for an electric dust collector according to claim 2 of the present invention, in the invention of claim 1, the installation position of the rectifying means is such that a distance from the ventilation hole of the ceiling wall to the rectifying means is different. It is characterized in that it is 20% or less of the entire length of the insulator.

According to the present invention, the air flow reaches the rectifying means in a state where the flow velocity of the air flow is not so much reduced, so that the rectifying effect is large.

According to a third aspect of the present invention, there is provided the insulator for an electric precipitator according to the first or second aspect, wherein the rectifying means is a perforated plate or a wire mesh.

According to the present invention, the structure is simple and sufficient effects can be obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an insulator for an electric dust collector according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the electric precipitator has a processing gas inlet 11 and a purifying gas outlet 12 at opposing positions of an apparatus housing 10, between which a discharge electrode and a precipitating electrode are provided. The dust collector main part 13 provided with the above is accommodated. An insulator storage case 14 is provided on the upper surface of the ceiling wall 10 a of the device housing 10, and an insulator 15 is provided in the case 14. A core wire 16 is inserted through the center of the insulator 15, and a lower portion of the core wire 16 is connected to the discharge electrode 13 of the dust collector main unit 13.
a so that the discharge electrode 13a is connected to the device housing 1
It is supported within 0.

As shown in FIG. 2, the insulator 15 of the electrostatic precipitator is formed in a truncated conical shape, and inside thereof,
A hollow part 17 opening downward is formed. And
A plurality of ventilation holes 18 are formed in the ceiling wall 15a of the insulator 15. In the hollow portion 17 of the insulator 15, a rectifying plate 19 a as rectifying means 19 is supported by a plurality of rods 20 immediately below the ventilation hole 18 at a position of 20% or less of the entire length of the insulator. . As shown in FIG. 3, the rectifying plate 19a is separated from the side wall 15b of the insulator 15 by an appropriate distance 2.
1a, and are disposed at an appropriate interval 21b from the core wire 16.

The insulator 15 thus configured is mounted on the pedestal 2.
2 and is mounted and fixed on the upper surface of the ceiling wall 10a of the device housing 10 via the base 2. The high-pressure air in the insulator 15 is supplied to the holes 23 formed in the ceiling wall 10 a of the device housing 10.
A stool 24 for guiding the inside is mounted.

In this electric dust collector, the blower 25 (FIG. 1)
) Supplies high-pressure air into the insulator housing case 14. Then, as shown in FIG. 3, the high-pressure air supplied into the insulator storage case 14 is
Then, the gas is introduced into the hollow portion 17 of the insulator 15, the flow is regulated by the current plate 19 a, and the laminar flow is injected into the device housing 10.

In the above embodiment, the rectifying plate 19a is used as the rectifying means, but a wire net may be used instead of the rectifying plate 19a.

As shown in FIG. 4, the rectifying means may be a propeller 19b rotatably mounted on the core 16 or the like. Propeller 19b in this case
Are rotated by the high-pressure air flowing from the ventilation holes 18, thereby rectifying the high-pressure air.

[0020]

As described above, according to the first aspect of the present invention,
According to the insulator for an electric dust collector, the high-pressure air introduced into the insulator is rectified and guided into the device housing.
No eddy current is generated in the insulator, and therefore, there is no possibility that gas, dust, and the like in the device housing are caught in the insulator.

According to the second aspect of the present invention, since the rectifying means is located near the ceiling wall, the flow rate of the air introduced from the ventilation hole is high. Since the rectification is performed, the rectification effect is large.

According to the insulator for an electric precipitator of the third aspect of the present invention, the structure is simple and a sufficient rectifying effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view conceptually showing an electric precipitator provided with an insulator according to the present invention.

FIG. 2 is a cross-sectional perspective view showing an embodiment of the insulator for an electric precipitator according to the present invention.

FIG. 3 is a conceptual cross-sectional view illustrating an operation of the electric dust collector insulator shown in FIG. 2;

FIG. 4 is a cross-sectional view conceptually showing another embodiment of the insulator for an electric precipitator according to the present invention.

FIG. 5 is a conceptual sectional view showing a conventional insulator for an electric precipitator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Device housing, 10a ... Ceiling wall, 11 ... Processing gas inlet, 12 ... Purification gas outlet, 13 ... Dust collector main part, 13a
... discharge electrode, 14 ... insulator storage case, 15 ... insulator, 15a
... ceiling wall, 15b ... side wall, 16 ... core wire, 17 ... hollow part,
18 ... vent, 19 ... rectifying means, 19a ... rectifying plate, 19
b: propeller, 20: rod, 21a, 21b: interval,
22: pedestal, 23: hole, 24: stool, 25: blower

Claims (3)

[Claims] A hollow portion opened at the lower end inside the insulator, a vent hole is formed in a ceiling wall of the hollow portion, and high-pressure air is introduced into the hollow portion of the insulator through the vent hole. An insulator for an electric precipitator in which high-pressure air is blown into an apparatus housing to prevent gas, dust and the like from entering the hollow section of the insulator in the apparatus housing. An insulator for an electrostatic precipitator, comprising a rectifying means for dispersing a flow. 2. The electric dust collector according to claim 1, wherein a position of the rectifying means is such that a distance from the ceiling wall to the rectifying means is equal to or less than 20% of a total length of the insulator. insulator. 3. The insulator for an electrostatic precipitator according to claim 1, wherein the rectifying means is a perforated plate or a wire mesh.