Method for removing mercury from flue gas

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...

AI Technical Summary

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 plate catalysts and occupies a large area. The amount of catalyst is large, so the investment and operation costs are high, and the process is usually complicated, operation and maintenance are difficult, and it is difficult to promote and apply on a large scale

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