KR20020023322A - Electric charged cyclone bagfilter dust collector - Google Patents

Abstract

PURPOSE: An integral electrostatic precipitator cyclone bag filter dust collector is provided which is compact and enables high efficient dust collection by collecting only merits of conventional dust collectors including electric charger, electrostatic precipitator, cyclone and bag filter house. CONSTITUTION: In a system for treating dust discharged, the integral air pollution prevention system is characterized in that an electric discharging part electrical charging dust flown into the system from a discharging source(1), a cyclone part which is rotated so that electric charged dust has centrifugal force and a bag filter house collecting fine dust through a bag filter(4) are integrated, wherein a dust electric charger is integrally mounted on the inlet part of the integrated cyclone bag filter that is constructed by integrating the cyclone and the bag filter(4) in an integral electrostatic precipitator cyclone bag filter(10) so that electric charged dust passing through the electric charger is collected at the cyclone part(11) and the bag filter part(12).

Description

Integrated electric charged centrifugal filter for dust removal {Electric charged cyclone bagfilter dust collector}

The present invention relates to a dust collector that can maximize the collection efficiency in the collection and removal of dust generated in cement plants, pulp and paper mills, waste incineration process, non-ferrous metal manufacturing process, heavy oil and pulverized coal combustion process, steelmaking process.

Conventionally, the electric dust collector 7, the centrifugal force dust collector 2, and the filter dust collector 3 have been used as a method of collecting and removing dust discharged from an industry.

In FIG. 2, the electrostatic precipitator 7 is charged with negative (-) charge while the incoming dust passes through the discharge electrode unit 8, and the charged dust is collected in the dust collecting electrode 9 by electrostatic attraction. The advantages of the electrostatic precipitator are that the pressure loss is small and the power is reduced, so that the overall cost can be reduced during the service life of the apparatus. I can. On the other hand, the disadvantage is that the initial investment is high, and due to the limitation of the electrical resistivity, it is difficult to collect large diameter particles.

In FIG. 1, the centrifugal force dust collector 2 is widely used throughout the industry because of its low facility cost, economical power cost, simple structure, and high temperature. However, since the dust collection efficiency is reduced in the small particles, there is a disadvantage that can not be used independently for dust treatment containing a large amount of dust below 10㎛.

The filter dust collector 3 is a dust collector using the bag filter 4, and can be applied to various particle size distributions from fine dust of 1 μm or less to dust that is difficult to collect with an electrostatic precipitator due to a high specific resistance, and can produce high dust collection efficiency. There is an advantage that can be applied to the concentration range. It can also remove dust containing fine harmful substances such as dioxins and heavy metals. However, the drawback of the bag filter is that as the filter operation progresses, the dust layer trapped in the filter cloth becomes thicker, and the pressure loss of the filter cloth is greatly increased, and thus, the frequent dedusting operation is applied, thereby rapidly decreasing the life of the filter cloth.

It is an object of the present invention to provide an electrostatic precipitator, a centrifugal force dust collector, and a filter dust collector integrated dust collector, which combines only the advantages of the conventional dust collector as described above and enable compact and high efficiency dust collection.

1 is a block diagram of a conventional exhaust gas treatment device 1-cyclone baghouse device

2 is a schematic diagram of a conventional exhaust gas treating apparatus.

Figure 3 Longitudinal sectional view of the integrated exhaust dust treatment apparatus according to the present invention

* Explanation of symbols for the main parts of the drawings

1: Source of Air Pollutant

2: cyclone

3: bag filter house

4: Bag filter

5: blower

6: stack

7: electrostatic precipitator

8: discharge electrode

9: dust collector

10: integrated electrostatic precipitating centrifugal filter

11: cyclone part

12: backhouse

13: electrostatic precipitator

14: entrance

15: inner tube

The integrated electric charge centrifugal filter 10 for dust removal has a discharge device 13 including a discharge electrode 8 at an inlet 14, and a centrifugal force dust collector 11 at a lower end thereof. A filter dust collector 12 including a filter cloth 4 is provided.

The centrifugal force precipitator 11 and the electric charge device 13 are mainly used to solve the problem of increasing pressure loss, which is the main disadvantage of the filter dust collector 12 having a dust collection efficiency of 99.9% or more for various particle size distributions. do. The centrifugal force collector 11 is installed at the lower end of the filter dust collector to collect dust of a large diameter with a diameter of 10 ㎛ or more to serve to reduce the load of the filter dust collector. The discharge electrode 8 is installed at the inlet of the centrifugal dust collector so that the dust passing through the inlet is charged to the negative electrode. At this time, the charge rate of the small dust having a particle diameter of 10 μm or less is relatively large. The electrical coagulation between particles occurs due to the difference in the electric force charged between the fine dusts, and a centrifugal dust collector is formed by forming a particle group having a large volume and weight. Capture is possible at. The remaining fine dusts which are not collected by the centrifugal force collector 11 are collected by the bag filter 4 of the filter dust collector 12 and the porous dendritic structure is formed on the surface of the filter cloth due to the electric force between the dust particles. To form. The dust layer thus formed has a high porosity, thereby reducing the pressure loss.

The integrated electric charge centrifugal filtration device can reduce the maintenance cost by greatly extending the replacement life of the filter cloth as the pressure burden of the filter dust decreases and the dedusting interval increases due to the centrifugal dusting and the electric charge effect. The most effective air pollution prevention device can be operated.

Claims (1)

In the apparatus for treating the discharged dust, the electric discharge unit for charging the dust flowing from the discharge source, the centrifugal dust collector and the baghouse filtration device for collecting the fine dust through the bag filter and the centrifugal dust to rotate so that the charged dust has a centrifugal force Integrated integrated air pollution prevention device.