Composite desulfurization and denitrification agent for flue gas purification of power plant and preparation method of composite desulfurization and denitrification agent

Abstract

The invention discloses a composite desulfurization and denitrification agent for flue gas purification of a power plant and a preparation method of the composite desulfurization and denitrification agent. The composite desulfurization and denitrification agent comprises the following components in parts by mass: 10.0-49.0 parts of a macromolecular desulfurization and denitrification agent, 5.0-10.0 parts of a synergistic macromolecular polymer, 20-40 parts of an alkaline substance and 0-10.0 parts of an auxiliary agent, wherein the macromolecular desulfurization and denitrification agent is an ammonium and/or amine source. A water cooling jacket is sleeved outside a high-speed mixer, all the components are put into the high-speed mixer to be rapidly stirred and mixed, heat is generated in the mixing process, the reaction process is jointly fed back by relying on circulating water in the water cooling jacket and the stirring rotating speed, the reaction temperature is controlled to be 60-80 DEG C, and the mixing reaction is carried out for 10-20 min. The composite desulfurization and denitrification agent can be used for simultaneous desulfurization and denitrification of flue gas, can also be used for independent denitrification or desulfurization and has high desulfurization and denitrification rate, the denitrification rate reaches 80.6%-99% under the condition of 800-1050 DEG C, and the desulfurization efficiency is greater than 90%.

Description

technical field [0001] The invention belongs to the technical field of power plant flue gas purification, and in particular relates to a composite desulfurization and denitrification agent for power plant flue gas purification and a preparation method thereof. Background technique [0002] SO 2 and NO x It can form photochemical smog, which threatens human health and life. The country has stricter and stricter requirements on the emission of flue gas pollutants, and the desulfurization and denitrification processes are becoming more and more complicated. Desulfurization requires wet method, which produces a large amount of wastewater and gypsum. process, the spent catalyst needs to be treated as hazardous waste. Therefore, a simplified desulfurization and denitrification process is urgently needed, which can remove pollutants in one step, reduce equipment investment and operating costs, and achieve discharge standards. [0003] At present, most researches and patents ar...

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Problems solved by technology

[0004] CN113731159A announces a kind of preparation method of calcium-based particle synchronous desulfurization and denitrification agent, Ca(OH) 2 , biomass ash, KMnO 4 , diatomaceous earth, PEO (polyethylene oxide), aluminum sol, MgSO4, kneading and kneading on a molding granulation line, and then further mixing the raw materials with water in a kneader to form a uniformly dispersed wet billet, and drying to obtain a dry embryo body , and discharged after cooling to obtain finished products, which are used in desulfurization and denitrification to meet environmental protection requirements. The preparation process is quite complicated, resulting in high raw material costs and unaffordable prices.

[0005] The traditional desulfurization and denitrification process system is complicated, and the investment and operation cost is high. The preparation process of the existing desulfurization and denitrification agent is complicated, and the finished product needs to be mixed, dried and cooled, resulting in high price

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