Coal-fired boiler SNCR and SCR combined denitration system and method thereof
A technology for coal-fired boilers and SCR reactors, which is applied in chemical instruments and methods, separation methods, lighting and heating equipment, etc., can solve problems such as uneven distribution, corrosion, and inability to mix evenly, and achieve uniform distribution of ammonia-nitrogen molar ratio. The effect of improving distribution uniformity and improving mixing uniformity
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[0030] The present invention will be further described in detail below in conjunction with specific embodiments, which are for explanation rather than limitation of the present invention.
[0031] The present invention is a coal-fired boiler SNCR and SCR combined denitration method. The short spray gun 71 and the multi-hole long spray gun 72 are arranged in the furnace cavity during the SNCR reaction of the boiler, and the flue gas mixer 9 and the SCR flue gas set in the flue of the boiler are used at the same time. The channel reactor does not require an additional SCR reductant injection device to overcome the low denitrification efficiency caused by the uneven mixing of the reductant and NOx in the existing process, and the equipment blockage and corrosion problems caused by the large ammonia escape, and realize the overall comparison of the SNCR and SCR systems. High denitration efficiency. At the same time, the SCR reactor can be modified using the tail flue of the boiler, w...
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