KR940001415B1 - Wet electric dust collector - Google Patents

Abstract

an injector (3) primarily purifying hazardous gas containing dusts etc., fixed weights (15) located individually in thlowest part of discharging electrodes (6) located between the injector (3) and collecting plates (5), a latticed plate (11) fixing the weights (15) to fixed positions, a porous plate (11) located in the lowest part of the latticed plate (17), injection valves (9) to form water-film in the collecting plate (5) and in midair, demister (12), and a packing layer (13) in order to filter the gases secondarily. This precipitator is characterized by a gas inlet pipe, a packing layer (20) packed with particles in order to reduce the velocity of ascending gas and enlarge the contact surface, and a sprayer (3') injecting the water circulated from a water-tank (21).

Description

PACKING TYPE Wet Electrostatic Precipitator

1 is a schematic longitudinal cross-sectional view illustrating the operation of the present invention.

2 is a particle view of the packing formed in the packing layer

3 is a vertical cross-sectional view of the dust collector of the present invention

Figure 4 is a bottom longitudinal cross-sectional view of the dust collector of the present invention

* Explanation of symbols for main parts of the drawings

1: gas inlet pipe 2,2a: drain pipe

3,3 ': injector 4: washing tower

5: dust collecting plate 6: discharge electrode

7: insulator 8: washing valve

9: injection valve 10: power line

11: perforated plate 12: demister

13 packing layer 14 outlet

15: fixed weight 16: body

17 grating 20 packing layer

21: water tank 22: packing

The present invention relates to a dust collector for purifying harmful gas discharged from a chimney such as a factory, and more particularly, to a packaged wet electrostatic precipitator which is efficiently used for removing high temperature dust. It is an improvement of the standard wet electrostatic precipitator.

At present, the wet electrostatic precipitator has been disclosed as Japanese Utility Model Publication No. 57-70452, but this is simply to remove the dust adhering to the dust collector (dust collecting plate) by intermittently spraying water from the upper side, so that it is not ionized. It is not possible to remove the gas and high concentration and high temperature dust, and there is no means to purify and cool the incoming hot gas as the primary, so the efficiency of dust collection is reduced and there is no fixing means for the electrode or the dust collecting plate. In this case, there is a risk of an accident due to the shaking of the electrode or the dust collecting plate.

On the other hand, the present invention is an improvement of the patent application of 91-16880 in order to improve this problem, and to cool and remove the gas flowing into the gas inlet pipe to the primary in order to filter the high-temperature dust at the same time and to cool it at the same time. When the cooled hot gas passes through the packing layer, which is the particle layer of the tortuous packing, and ascends along the winding surface at a slowing rate, it is completely cooled by the water sprayed from the injector formed at the top of the packing layer. By removing even fine particles, the efficiency of dust collection is increased.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 4, in the configuration of the present invention, a lower portion of the body 16 has a gas inlet pipe 1 into which a high temperature harmful gas flows and is formed to be inclined downward, and a high temperature thereof is formed thereon. An injector 3 is formed in all directions of the body 16, and a packing layer 20, which is a particle layer of the packing 22, on which a serpentine surface is formed, is formed on the upper part of the body 16 to simultaneously cool the gas. The upper part of the injector (3 ') is formed in all directions, the lower bottom is formed with a discharge port 14 for recycling the water sprayed from the injector (3), the upper part of the injector (3) The perforated plate 11 is formed to be evenly distributed, and the discharge electrode 6 is formed directly below each other between the plate-shaped dust collecting plates 5 extending in a row downwards in a line with a fixed weight at the bottom of the discharge electrode 6. 15 is formed, the fixed weight 15 Located between the grid plate 17 to prevent the discharge electrode 6 from shaking due to the pressure of the gas flowing through the hole of the porous plate 16, the discharge electrode 6 has a function to spread straight, The hole formed in the plate 11 prevents the inflow of the gas evenly spreading to only a specific dust collecting plate 5, wherein the dust collecting plate 5 is fixed to the lower portion of the discharge electrode 6, the discharge electrode 6 ) Is fixed at the upper part of the dust collecting plate 5 so that power can be supplied through the insulator 7.

In addition, an injection valve 9 is formed in the upper part of the dust collecting plate 5 to form a water film and a spray phenomenon on the dust collecting plate 5, and the water injected from the injection valve 9 uses purified water and the injection valve ( The upper part of the 9) is formed with a cleaning valve (8) for washing the foreign matter adhering to the dust collecting plate (5), the upper part of the cleaning valve (8), the demister (12) to remove the moisture contained in the purified gas ) Is formed and a packing layer 13 for completely removing moisture on the demister 12 is formed.

This is because the hot gas flowing into the gas inlet pipe (1) is cooled and filtered by the injector (3) in a state in which the inflow speed of the gas is not reduced, so that the hot gas is not completely cooled. In order to slow down the ascending rate, the water sprayed from the injector 3 'formed at the top of the packing layer 20 while passing through the packing layer 20 completely cools the high-temperature gas at which the velocity is reduced, and at the same time, water is also applied to the fine particles. It can be removed.

In addition, (-) power is applied to the discharge electrode 6, (+) power is applied to the dust collecting plate 5, and moisture removed from the packing layer 13 and the demister 12 is applied to the drain pipe 2a. It will flow down the wall of the body 16 through.

Therefore, the high temperature harmful gas flowing into the gas inlet pipe 1 is first cooled and purified in the sprayer 3, and the purified gas passes through the packing layer 20 while reducing the rising speed of the sprayer 3 '. Due to the water sprayed on, it can be completely cooled and removed even for fine particles, which are then subjected to the same process as in the standard wet electrostatic precipitator.

In detail, the high-temperature dust cooled and filtered by the sprayer 3 is first cooled by the water sprayed from the sprayer 3 'while passing through the packing layer 20, and at the same time, dust (particles), etc. Filtered and discharged to the outlet (2) together with the first filtered dust, and the secondary filtered harmful gas ascends to the washing tower (4) to carry a (-) charge due to the (-) power generated from the discharge electrode (6) The harmful gas carrying negative (-) charge is bonded to the dust collecting plate 5 to which the positive power is applied.

This means that the different poles are pulled and the same poles are pushed, and the dust inflow into the gas inlet pipe (1) enters a high pressure. Therefore, when these dust lamps are concentrated only on a specific dust collecting plate (5), the efficiency of dust collection is Since it is to fall evenly distributed to the plurality of dust collecting plate 5 is formed through the porous plate 11 to improve the efficiency of dust collection.

When the noxious gas with negative charge adheres to the dust collecting plate 5 to which the positive power is applied, the washing valve 8 disperses a large amount of water 5-6 times a day to the dust collecting plate 5. The harmful gas adhered to the dust collecting plate 5 is washed, and molecules which cannot be ionized are adhered or sprayed to the dust collecting plate 5 while the dust is raised due to the spraying phenomenon and the water film formed on the dust collecting plate 5. It is to be removed from the air by the dust is adhered to the dust collecting plate (5) is to flow down immediately due to the continuous spraying.

In this way, all of the harmful gases are adhered to the dust collecting plate 5, and only smoke that is harmless to the human body rises.

However, since the smoke contains moisture, moisture is first filtered from the demister 12 and then completely filtered from the packing layer 13 to be discharged to the atmosphere. The demister 12 and the packing layer 13 are removed. Moisture removed from the water flows down through the drain pipe (2a) and the water flowing down the dust collecting plate (5) flows down the wall of the body (16) through the drain pipe (2) formed at the bottom of the dust collecting plate (5) will be.

Therefore, even in the case of high-temperature dust is cooled with water in a state in which the ascending speed is reduced while passing through the packing layer 20, the efficiency of dust collection is not to fall so that it can be used for a long time without failure.

Claims (1)

Fixing fixed weights 15 and fixed weights respectively formed at the lower end of the discharge electrode 6 formed between the injector 3 and the dust collecting plate 5, which primarily purify the harmful gas containing dust, etc. A spray valve 8 for cleaning the material collected in the dust collecting plate and the porous plate 11 formed on the lower portion of the grating plate 17 and the grating plate 17 and a spraying plate for forming a water film in the air with the dust collecting plate 5. In the well-known standard wet electrostatic precipitator consisting of a valve 9, a demister 12 for removing moisture of the purified gas containing moisture, and a packing layer 13 for secondary filtering thereof, the gas inlet pipe ( In order to reduce the velocity of the rising gas to the top of the injector 3 of 1) and improve the contact surface at the same time, a packing layer 20, which is a particle layer of the tortuous packing 22, is formed and at the top of the water tank 21 The water circulated is continuously sprayed through the sprayer 3 ' L Kidd type wet electrostatic precipitator, characterized in that the.