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Transverse pole plate circling type wet electrostatic precipitator and wet electrostatic precipitation method

A technology of wet electrostatic precipitator and polar plate, which is applied in the direction of external electrostatic separator, etc., can solve the problems of short residence time of flue gas, dead spot of dry spot anti-corona dust removal, uneven water film of anode plate, etc., so as to avoid local dry spot , avoid back corona phenomenon, prolong the effect of residence time

Inactive Publication Date: 2015-03-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of wet electrostatic precipitator and electrostatic precipitator method of horizontal plate circumvention, in order to solve the local uneven water film on the anode plate of the existing wet electric precipitator, local dry spot reverse corona and generation of dust removal dead angle, Problems such as short residence time of flue gas

Method used

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  • Transverse pole plate circling type wet electrostatic precipitator and wet electrostatic precipitation method

Examples

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Embodiment 1

[0029] Such as figure 1 As shown, a horizontal plate-flowing wet electrostatic precipitator of the present invention includes a housing 1, and the left and right ends of the housing 1 are respectively provided with a horn-shaped air inlet 2 and an air outlet 3, and inside the air inlet 2 Arrange multi-layer gas distribution plates. An ash hopper 7 is arranged at the bottom of the housing 1, and a slurry outlet is arranged at the bottom of the ash hopper 7.

[0030] Inside the casing 1, an atomized water spray system 6 and a dust removal unit are arranged. The dust removal unit includes several rows of anode plates 4 and cathode lines 5 perpendicular to the flow direction of the flue gas. A plurality of anode plates 4, the distance between the edges of two adjacent anode plates 4 is 80mm, there are several sections perpendicular to the flow direction of the flue gas, the distance between two adjacent sections is 300mm, and the cathode lines 5 are arranged between the two adjac...

Embodiment 2

[0035] The rest are the same as in Embodiment 1, except that the distance between the edges of two adjacent anode plates 4 is controlled to be 50mm, the plate width of the anode plate 4 is 0.4m, the plate length is 5m, and there are several sections perpendicular to the flow direction of the flue gas. The distance between each section is 200mm.

[0036] The particle removal efficiency of the horizontal plate-flowing wet electrostatic precipitator can reach 99%, and the outlet emission concentration is lower than 5mg / m 3 ;SO 3 The removal efficiency can reach 80%, and the outlet emission concentration is lower than 5mg / m 3 ; Hg 0The removal efficiency can reach 85%, and the outlet emission concentration is lower than 5μg / m 3 .

Embodiment 3

[0038] The rest are the same as in Embodiment 1, except that the distance between the edges of two adjacent anode plates 4 is controlled to be 100 mm, the plate width of the anode plate 4 is 0.8 m, the plate length is 10 m, and there are several sections perpendicular to the flow direction of the flue gas. The distance between each section is 500mm.

[0039] The particle removal efficiency of the horizontal plate-flowing wet electrostatic precipitator can reach 99%, and the outlet emission concentration is lower than 5mg / m 3 ;SO 3 The removal efficiency can reach 80%, and the outlet emission concentration is lower than 5mg / m 3 ; Hg 0 The removal efficiency can reach 85%, and the outlet emission concentration is lower than 5μg / m 3 .

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Abstract

The invention relates to a transverse pole plate circling type wet electrostatic precipitator and a wet electrostatic precipitation method which are used for trapping and removing multiple pollutants such as particulate matters, SO3, Hg. The transverse pole plate circling type wet electrostatic precipitator comprises a shell; the shell is internally provided with an atomized water spray system and a plurality of dust removing units; the atomized water spray system comprises an atomized water spray pipeline and conical nozzles which are evenly spaced; each dust removing unit comprises a plurality rows of anode plates and a plurality rows of cathode lines, wherein the directions of the anode plates are longitudinal to the flue gas flowing direction. The dust-containing flue gas flows in a circling way after passing through gaps among the anode plates in the same row, so that the scour for water films on the surfaces of the anode plates can be reduced, and the phenomena of local dry spots and back corona can be avoided. The transverse pole plate circling type wet electrostatic precipitator is reliable in operation, and the pollutant trapping efficiency and the system stability of the wet electrostatic precipitator are improved.

Description

technical field [0001] The invention belongs to the technical field of wet electrostatic precipitator and multi-pollutant removal, in particular to a kind of particulate matter, SO 3 The invention relates to a trapping and removing device for pollutants such as Hg and Hg, in particular to a horizontal plate-circumventing type wet electrostatic precipitator and an electric precipitator method. Background technique [0002] The wet electrostatic precipitator combines the advantages of the electrostatic precipitator and the wet precipitator. Due to the spraying of atomized water, the specific resistance of the particles is stable. 2.5 , SO 3 With high capture efficiency of Hg and elemental Hg, it has become the preferred high-efficiency dust collector for flue gas purification after wet desulfurization and high-risk gases such as coal gas. It is more and more used in flue gas and Deep purification of blast furnace gas in the iron and steel industry. [0003] Existing wet ele...

Claims

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Application Information

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IPC IPC(8): B03C3/16
CPCB03C3/16
Inventor 朱廷钰王雪
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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