Efficient ammonia desulphurization and dust removal device and application method thereof

Abstract

The invention discloses an efficient ammonia desulphurization and dust removal device and an application method thereof. The device comprises a desulfurization tower, an ammonium sulfate discharge pump connected with the bottom of the desulfurization tower, an ammonium sulfate post-treatment system and / or a drying system connected to the downstream of the ammonium sulfate discharge pump, a concentration circulating pump connected between a concentration crystallization area in the desulfurization tower and the bottom of the desulfurization tower, an oxidation tank connected with a segmented absorption area in the desulfurization tower, an absorption pump which is connected between the oxidation tank and the deep washing demisting area, a liquid ammonia supply equipment which is connected to the upstream of the oxidation tank, and a washing circulation box and a washing pump which are connected to the deep washing demisting area. The desulfurizing tower is arranged in a partitioned manner, so that dust and mist can be absorbed in a graded manner; the sectional absorption area is divided into two sections, so that the SO2 absorption rate is increased, and flue gas dust is effectivelyremoved. By arranging the filler, the gas-liquid contact area is increased, and ammonia escape and aerosol components carried in the flue gas can be effectively removed. And through the ammonium sulfate post-treatment system and the drying system, the crystallized slurry can be reutilized and treated.

Description

technical field [0001] The invention belongs to the field of desulfurization construction, and in particular relates to a high-efficiency ammonia desulfurization and dust removal device and an application method thereof. Background technique [0002] At present, ammonia desulfurization is widely used in boilers in the chemical industry, and ammonia is used to absorb SO in coal-fired flue gas. 2 , to generate ammonium sulfite and ammonium sulfate; the economy of ammonia desulfurization lies in the 2 Recyclable, able to remove the pollutant SO in the flue gas 2 It is transformed into commercial ammonium sulfate. At the same time, ammonia desulfurization does not discharge solid waste and sewage, and does not increase carbon emissions, so it has a good market prospect. [0003] With the increasingly stringent emission limits of coal-fired flue gas pollutants, new challenges have been posed to ammonia desulfurization technology; for a long time, there have been too many proble...

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Problems solved by technology

[0004] The invention provides a high-efficiency ammonia desulfurization and dust removal device and its application method, which are used to solve the technical problems such as a large amount of ammonia escape and aerosol generated during the ammonia desulfurization process, causing serious flue gas tailing phenomenon, etc.

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