Efficient mixing system conducive to mixing denitration

Abstract

The invention discloses an efficient mixing system conducive to mixing denitration, comprising an efficient mixing system. The efficient mixing system comprises a first-class efficient mixing device and a second-class efficient mixing device, wherein the first-class efficient mixing device comprises a plurality of first-class efficient mixing elements, each first-class efficient mixing element comprises a seamless steel pipe and a folded circular steel plate, winged edges of both sides of the folded circular steel plate simultaneously penetrate through the seamless steel pipe, and the second-class efficient mixing device comprises a plurality of second-class efficient mixing elements, each second-class efficient mixing element comprises a seamless steel pipe and a circular steel plate, the circular steel plate penetrates through the seamless steel pipe. Through an idea of thinking from the part to the whole, a flow field of the denitration is optimized, the position, type and series of installing the efficient mixing system are determined, and the mixed quality of ammonia flue gas is improved, so that the anti-interference of the denitration system to the change of an incoming flow working condition is improved, the safe and economic operation of an unit is ensured and the existing technology problems are solved.

Description

technical field [0001] The invention relates to the field of SCR denitrification systems, in particular to a high-efficiency mixing system conducive to denitrification mixing. Background technique [0002] At present, coal-fired power plant boilers in my country have installed denitrification systems, most of which adopt SCR denitrification methods. In the initial stage of construction and operation of some active projects, due to the high activity of newly installed catalysts, the overall efficiency reaches the standard, but as the operation time increases, the catalyst activity The problem of ammonia-nitrogen molar ratio deviation is gradually exposed, and it is intuitively manifested as large deviation of desulfurization and denitrification CEMS, increased ammonia consumption, and blockage of air preheater. [0003] Three ministries and commissions "Coal Power Energy Conservation and Emission Reduction Upgrading and Transformation Action Plan (2014-2020") clarifies the def...

AI Technical Summary

Problems solved by technology

Under low load conditions, especially the AIG ammonia injection type, the combustion adjustment leads to changes in flue gas flow, which in turn leads to a mismatch between NH3 and NOX, a decrease in denitrification efficiency, increased ammonia slip, and increased air preheater clogging

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