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Method and device for mercury removal of flue gas

A mercury and flue gas removal technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve problems such as high operating costs, loss of activated carbon, and unfavorable comprehensive utilization of fly ash by power plants

Inactive Publication Date: 2015-03-04
TIANHE BAODING ENVIRONMENTAL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when this flue gas mercury removal technology is applied, due to the fast flow rate of flue gas, the loss of activated carbon is serious, the utilization rate of activated carbon is low, and the consumption is large
At the same time, the cost of activated carbon is relatively high, so the operating cost is high
In addition, a large amount of activated carbon and mercury are added to fly ash, which is not conducive to the comprehensive utilization of fly ash in power plants

Method used

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  • Method and device for mercury removal of flue gas
  • Method and device for mercury removal of flue gas
  • Method and device for mercury removal of flue gas

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Embodiment Construction

[0027] For ease of understanding, the present invention will be further described below in conjunction with the accompanying drawings.

[0028] see figure 1 , is a flue gas mercury removal device provided in Embodiment 1 of the present invention, including a wet desulfurization absorption tower 1 and an activated carbon adsorption reactor 2 .

[0029] The wet desulfurization absorption tower 1 refers to the absorption tower applied to the wet desulfurization system, which is installed at the end of the flue and after the dust collector.

[0030] The wet desulfurization absorption tower 1 includes a circulation pipeline 11, a spraying part 12, and an integrated ventilation part and a liquid holding part. The vent part is located above the liquid holding part, and the vent part is provided with a smoke inlet 131 near the bottom of the vent part and a smoke outlet 132 near the top of the vent part. The spraying part 12 is located in the ventilation part, between the smoke inlet...

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Abstract

Relating to the technical field of thermal power generation, the invention provides a method and device for mercury removal of flue gas. The device comprises a wet desulphurization absorption tower (1) and an activated carbon adsorption reactor (2). The wet desulphurization absorption tower (1) includes a circulating pipeline (11), a spraying part (12), and an integrated ventilation part and liquid holding part. The inlet of the activated carbon adsorption reactor (2) is communicated with the circulating pipeline (11) through a pipeline, and the outlet is communicated with the liquid holding part through a pipeline. The method specifically includes the processes of: leading a desulfurized slurry out of the wet desulphurization absorption tower (1); utilizing activated carbon to adsorb mercury in the desulfurized slurry; sending the desulfurized slurry adsorbed by activated carbon back to the wet desulphurization absorption tower (1). The method and the device provided by the invention are characterized in that the mercury in the flue gas can reach a low emission value at a low cost, and at the same time other impurities cannot be introduced into the flue gas in the implementation process, so that no influence can be generated on comprehensive utilization of fly ash by users.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a method and device for removing mercury from flue gas. Background technique [0002] Mercury is the main component of heavy metal pollutants in the flue gas of coal-fired power plants, and its emission control is clearly stipulated in the "Emission Standards of Air Pollutants for Thermal Power Plants" (GB13223-2011) issued by the Ministry of Environmental Protection, which is 0.03mg / Nm 3 . According to the pilot monitoring results of the Ministry of Environmental Protection, most of the coal-fired power plants can meet the above emission standards under the condition of normal operation of existing facilities. This is because the domestic SCR (selective catalytic reduction) denitrification, electric / bag filter and wet desulfurization and other environmental protection facilities have a high penetration rate, and these environmental protection facilities have a ...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/14
Inventor 周烨王丽娜於承志王颖
Owner TIANHE BAODING ENVIRONMENTAL ENG
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