Spray washing device of wet type electric dust remover

Abstract

The invention provides a spray washing device of a wet type electric dust remover. The spray washing device comprises a desulphurization process water source, a water conveying pipeline, an electric adjustment valve (I), a spraying water pipe, a nozzle, an electric adjustment valve (II), a circulating water pipe, a filter, a circulating water pump, a connection pipe, a liquid suction pipe, a circulating water tank, a circulating water tank sewage drain pump, a circulating water tank sewage drain pipe, a desulphurization sewage pool, a sewage tank sewage drain pipe, a sewage tank sewage drain pump, a sewage tank and an ash bucket sewage drain pipe, wherein the electric adjustment valve (I) on the water conveying pipeline is in a closed state after circulating water normally works; when the dust remover needs to be supplemented with process water, the electric adjustment valve (I) is opened, and the electric adjustment valve (II) is closed, so that a circulating water system stops working; at the moment, the wet type electric dust remover performs high-pressure washing on the inner wall of an anode tube and the surface of a cathode wire through the process water; the electric adjustment valve (II) on the circulating water pipe is in a normally opened state, so that the circulating water can be always cyclically sprayed, and a layer of uniform water film can be always formed on each of the inner wall of the anode tube and the surface of the cathode wire; the dust removal effect of the dust remover can be enhanced.

Description

technical field [0001] The invention relates to a wet electrostatic precipitator, in particular to a spray flushing device for a wet electrostatic precipitator, which performs circular spray flushing on anode and cathode deposits in an electric field. Background technique [0002] The spraying and flushing device of the traditional tubular wet electrostatic precipitator in China is as follows: the desulfurization process water is connected to the spraying water pipe above the inside of the shell through the water pipe, the spraying water pipe is arranged horizontally, and an electric motor is installed on the water pipe outside the shell. water valve. A plurality of nozzles are arranged at intervals below each spray water pipe, arranged in a square equidistant manner. When the wet electrostatic precipitator is working normally, the electric water valve is closed and does not spray and rinse the shell. After working for a period of time, a certain thickness of dust is accum...

AI Technical Summary

Problems solved by technology

[0003] This structure has the following disadvantages: (1) Due to the short spray flushing time and large water volume, the electric field of the wet electrostatic precipitator must be powered off to stop working, and there is a short-term discharge exceeding the standard; (2) The spray device does not work when the wet electrostatic precipitator is working. Work, only wash once a day, too much dust on the inner wall of the anode tube and the cathode line

Part of the liquid droplets in the flue gas are too small to form an effective water film on the inner wall of the anode tube, the electric field discharge effect is weak, and it is impossible to collect fine dust, but it is easy to form a dry area on the inner wall of the anode tube, causing dust to accumulate in the dry area. (3) There is no water film on the needle tip of the cathode line to ensure that there is too much sticky dust and it is easy to rust and the service life is short

(4) Because the spray flushing system sprays once a day or so, the nozzles are in a non-working state for a long time, and the dust escaping from the flue gas is easy to block the nozzle holes, making the nozzles unable to spray or cannot form effective spraying when spraying. The solid water mist, thus losing or weakening the spray flushing effect

[0006] Although this structure does not need to close the electric field when spraying and flushing, it still has the following disadvantages: (1) The circulating spray water of the wet electrostatic precipitator only passes through the solid-liquid precipitation in the lower sewage tank and is filtered by the filter in the middle of the circulating water pipe. The circulating water of the nozzle contains more acrobatics, which affects the dust removal efficiency of the dust collector

(2) The process water spray system and circulating water spray system are arranged separately, and the system is complex

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