Denitration, desulfurization and dust-removal device and method applying same

Abstract

The invention relates to a denitration, desulfurization and dust-removal device and a method applying the same. The device is sequentially connected with at least one denitration, desulfurization and dust-removal module in the flow direction of the combustion flue gas; each denitration, desulfurization and dust-removal module comprises a gas mixing unit and an air cleaning unit which are connected sequentially, wherein the gas mixing unit comprises a gas mixing inner cavity as well as a flue gas inlet and an air inlet communicated with the mixing inner cavity; the air cleaning unit comprises a flue gas outlet which is communicated with a flue gas inlet of a next-stage denitration, desulfurization and dust-removal module. The denitration, desulfurization and dust-removal method provided by the invention utilizes air and water to realize stepped denitration, so that the concentration of nitride oxides is greatly reduced when particulate matters are removed, the sulfides also can be removed by introducing various wet-process desulfurization methods through the system, and thus, very import significance is achieved in occasions of coal-fired power plant smoke-gas treatment, adit dust removal, working environment air purification, restaurant and kitchen oily smoke removal, commercial or household air cleaning, and the like.

Description

technical field [0001] The invention relates to the field of air purification, in particular to a method for denitration, desulfurization and dust removal of combustion flue gas by using an air cleaning method and a device used therein. Background technique [0002] The status and problems of combustion flue gas treatment: At present, most of the primary energy in my country comes from coal combustion, and the combustion of coal will inevitably produce harmful gases such as particulate matter, nitrogen monoxide, nitrogen dioxide, and sulfur dioxide, polluting the environment. Since 2012, my country has promulgated a new batch of environmental protection standards for flue gas coal combustion, and the implementation requirements are very strict. As of 2015, there are very few cases that can fully meet the emission standards. The reason is that the traditional treatment methods are not ideal, either have defects or high operating costs. For example, bag dust removal is diffic...

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Problems solved by technology

[0002] The status and problems of combustion flue gas treatment: At present, most of the primary energy in my country comes from coal combustion, and the combustion of coal will inevitably produce harmful gases such as particulate matter, nitrogen monoxide, nitrogen dioxide, and sulfur dioxide, polluting the environment

[0004] Although the above invention can effectively remove dust in the air, it cannot simultaneously remove harmful gases such as nitrogen monoxide, nitrogen dioxide, and sulfur dioxide in the dusty gas, so it is necessary to improve the air cleaning unit

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