Method for removing mercury from flue gas

A technology for removing mercury and flue gas, applied in the field of mercury removal technology, can solve the problems of large area, large amount of catalyst, complicated process, etc., and achieve the effects of low manufacturing and installation cost, low investment and operation cost, and simple process flow

Inactive Publication Date: 2009-08-05
CHONGQING UNIV +1
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Problems solved by technology

[0005] The emission pollution of mercury in the flue gas has not yet taken effective treatment measures. In the prior art, the commonly used mercury removal process is the selective catalytic reduction process (SCR process), which generally uses honeycomb or pl

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  • Method for removing mercury from flue gas

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Embodiment 2

[0042] The flue gas mercury removal method of the present embodiment comprises the following steps:

[0043] First carry out the preparation of modified activated carbon, including the following steps:

[0044] I. Activated carbon and elemental sulfur with a particle size of 20 to 40 mesh enter the heating furnace according to a certain ratio through a weighing feeder;

[0045] II. In the heating furnace, sulfur is loaded onto the activated carbon through thermal precipitation at a temperature of 500°C, and the modified activated carbon can be obtained by keeping the temperature for 90 minutes.

[0046] The modified activated carbon prepared by this method is suitable for a wide range of flue gas temperature, and can be arranged before and after flue gas denitrification or flue gas desulfurization, and the arrangement method is also relatively flexible;

[0047] The mercury removal process includes the following steps:

[0048] a. The mercury sorbent is loaded into the react...

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Abstract

The invention discloses a method for demercuration of smoke gas. A mercury sorbent is filled in a reaction vessel by a feed distribution device; boiler smoke gas at a temperature of between 50 and 400 DEG C and the mercury sorbent of the reaction vessel are mixed and stirred to form a reaction bed layer so that the smoke gas and the mercury sorbent are in violet turbulent motion; purified smoke gas is pressurized and discharged by a chimney; the method adopts a simple adsorption and separation device; the device has a simple structure, occupies small area and has low manufacturing and mounting cost; a process flow is simple, occupies small area and has low investment and operating cost; the removing rate of mercury is more than 90 percent; the removing rate of dust is more than 95 percent; the method can be suitable for requirement of demercuration of smoke gas in a coal-fired power plant, is environment-friendly, economic, practical and suitable for promoting industry and forming scale production capacity, thereby being applicable to emergent requirement of promoting a task of atmospheric pollution treatment; modified active carbon used by the method can be applicable to wide temperature range of the smoke gas and can be arranged before or after denitration of the smoke gas or desulphurization of the smoke gas; and an arrangement mode is relatively flexible.

Description

technical field [0001] The invention relates to a mercury removal process, in particular to a flue gas mercury removal method. Background technique [0002] With the rapid development of science and technology, more and more attention is paid to the impact on the environment, and the requirements for environmental emission standards are becoming more and more stringent. [0003] Coal is a relatively common and important energy source, and coal-fired power generation is one of the most important ways to utilize coal. For a long time to come, coal-fired power generation will dominate. [0004] With the progress of society and the development of economy, the pollution of mercury in coal-fired flue gas has attracted more and more people's attention. Therefore, it is a severe challenge for the sustainable development of my country's energy field to effectively reduce mercury emissions and improve the impact on the environment. . [0005] The emission pollution of mercury in the...

Claims

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Application Information

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IPC IPC(8): B01D53/10B01D53/64
Inventor 杨剑杜云贵刘清才刘艺董凌燕隋建才洪燕丁小红吴其荣
Owner CHONGQING UNIV
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