Desulfurization wastewater zero-emission treatment device and method capable of collaborative demercuration

A desulfurization wastewater and treatment device technology, which is applied in the direction of gaseous effluent wastewater treatment, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of high operating costs and non-standard emission of flue gas Hg, and achieve effective removal Effect

Pending Publication Date: 2018-11-30
SINOPEC NANJING ENG & CONSTR +1
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of the existing coal-fired power plant flue gas Hg emissions not up to the standar

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  • Desulfurization wastewater zero-emission treatment device and method capable of collaborative demercuration

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with embodiment, but protection scope of the present invention is not limited to this:

[0025] Such as figure 1 As shown, a zero-discharge treatment device for desulfurization wastewater with synergistic mercury removal, the device includes a coal-fired boiler (1), SCR denitrification (3), high-voltage electrostatic precipitator (6) and desulfurization tower (8), the described The coal-fired boiler (1) is connected to the air precipitator (4) through the SCR denitrification (3), and the air precipitator (4) is connected to the high-voltage electrostatic precipitator (6) through the pipeline a, and the high-voltage electric precipitator ( 6) An output end in the middle part is connected to the bottom of the desulfurization tower (8) through the fan (7); the output end at the bottom of the high-voltage electrostatic precipitator (6) passes through the fly ash chute (18) and the throat in turn (19) link...

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Abstract

The invention discloses a desulfurization wastewater zero-emission treatment device and method capable of collaborative demercuration, and belongs to the technical field of flue gas pollutant control.According to the device, a fly ash surface activation spraying tower is additionally arranged before an electric dust collector; fine fly ash in an ash bucket of the high-voltage electric dust collector passes through an inclined groove and enters the tower from the lower part of a throat pipe of the spraying tower; the fly ash is fluidized and moves towards the upper part of the tower under theaction of a fan at the bottom of the tower and the action of a flow field in the tower; and desulfurization waste water passes through an atomizing station and enters the fly ash surface activation spraying tower from the upper part of the throat pipe. Compared with the existing demercuration technology, the demercuration technology disclosed by the invention overcomes the defect that the operation cost of the activated carbon injection demercuration technology is high, the adsorption effect of activated fly ash on Hg<0> is effectively utilized on the basis of realizing zero emission of wastewater, and the content of Hg<0> in flue gas is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal-fired flue gas pollutant control, in particular to a zero-discharge treatment method and device for desulfurization wastewater with coordinated mercury removal. Background technique [0002] Mercury emitted from combustion in coal-fired power plants is the main source of anthropogenic mercury emissions, and it is also the main field for controlling and mitigating Hg emissions. Control is imperative. At present, the control methods for Hg mainly include: mercury removal technology of existing pollutant control equipment, mercury removal technology of incoming coal additives, oxidation mercury removal technology, mercury removal technology of adsorbent and mercury removal technology of optimizing boiler operating parameters, etc. [0003] The existence forms of Hg in coal-fired flue gas are diversified. When the furnace temperature is higher than 800 °C, the mercury in coal is mostly in the form of el...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01D53/32B01D53/64B01D53/75B01D53/76B01D53/78B03C3/017F23J15/02C02F103/18
CPCC02F1/281B01D53/323B01D53/64B01D53/75B01D53/76B01D53/78B01D2258/0283B03C3/017C02F2103/18F23J15/02
Inventor 李军东李娟陈辉
Owner SINOPEC NANJING ENG & CONSTR
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