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Method for removing metallic mercury in flue gas

A metal mercury and flue gas technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as mercury pollution and threat to health, and achieve the effect of improving the efficiency of adsorption

Inactive Publication Date: 2019-12-17
大唐郓城发电有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is currently no method that can effectively remove multiple forms of mercury in the flue gas at the same time, resulting in serious mercury pollution and threatening people's health.

Method used

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  • Method for removing metallic mercury in flue gas

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] Such as figure 1 Shown, a method for removing metallic mercury in flue gas, comprises the steps:

[0038] Step 1, the flue gas containing metallic mercury enters the SCR reactor 1, and reacts with the mercury removal catalyst in the SCR reactor 1, and oxidizes a part of the gaseous elemental mercury in the flue gas into divalent mercury to obtain flue gas A ;

[0039] Step 2, the flue gas A enters the low-temperature electrostatic precipitator 2, removes t...

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Abstract

The invention provides a method for removing metallic mercury in flue gas. The method comprises the following steps: 1, the flue gas containing the metallic mercury enters an SCR reactor, and reacts with a mercury removal catalyst in the SCR reactor to make a part of gaseous elemental mercury in the flue gas oxidized into divalent mercury so as to obtain flue gas A; 2, the flue gas A enters a low-temperature electric dust collector, and particulate mercury in the flue gas A is removed to obtain flue gas B; 3, the flue gas B enters a desulfurization tower, and the divalent mercury in the flue gas B is removed to obtain flue gas C; and 4, the flue gas C reacts with an adsorbent at the gas inlet of a wet electrostatic dust collector to obtain flue gas D, the flue gas D enters the wet electrostatic dust collector, and the particulate mercury and the gaseous elemental mercury in the flue gas D are removed. The method can effectively remove the mercury in the flue gas.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, in particular to a method for removing metallic mercury in flue gas. Background technique [0002] With the promotion of ultra-low emission standards in the thermal power industry, more and more coal-fired power plants have achieved ultra-low emission targets. The implementation of ultra-low emission limit standards has indeed improved the atmospheric environment for several years. However, the implementation of the ultra-low emission limit standard has not fundamentally eliminated the smog, especially in winter, when the ambient temperature is low and the smoke diffusion conditions are poor, some areas will still form considerable smog , It has also sparked debate among people, especially the environmental protection circles, about the causes of smog. Although experts and scholars have different opinions on the causes of smog, the consensus reached is that the PM2.5 particles i...

Claims

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Application Information

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IPC IPC(8): B01D53/64B01D53/86B01D53/02B01D53/75B01D53/81B03C3/16
CPCB01D53/02B01D53/64B01D53/75B01D53/81B01D53/8665B01D2253/102B01D2257/602B03C3/16
Inventor 王腾飞杨腾郜玉森
Owner 大唐郓城发电有限公司
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