Optimizing system and method for denitration-system ammonia injection grating

Abstract

The invention provides an optimizing system and method for a denitration-system ammonia injection grating. The optimizing system comprises an A-side smoke outlet, a B-side smoke outlet, a sampling device and an ammonia injection control valve group; the ammonia injection control valve group is arranged in the A-side smoke outlet and the B-side smoke outlet, the sampling device is installed in theA-side smoke outlet and the B-side smoke outlet and located on the outer side of the ammonia injection control valve group, and comprises multiple sampling doors, and the sampling doors are evenly arranged in the A-side smoke outlet and the B-side smoke outlet. According to the optimizing system and method for the denitration-system ammonia injection grating, the multiple sampling doors are evenlyarranged at multiple sampling door outlets from the A side and the B side of a denitration outlet; through the adjusted denitration-reactor ammonia injection grating (AIG), the mixing uniformity of ammonia and smoke is improved, the using rate of a catalyst is increased, and the unit ammonia injection amount is decreased. By optimizing and adjusting the ammonia injection grating (AIG), outlets NOx are more evenly distributed, and denitration efficiency is better guaranteed; meanwhile, the ammonia consumption amount is decreased, the running cost is reduced, and the forming risk of ammonium bisulfate (ABS) is also reduced.

Description

technical field [0001] The invention relates to an ammonia injection grid optimization system of a denitrification system and an optimization method thereof. Background technique [0002] After the denitrification system was put into operation, the ammonia escaped from the ammonia and the sulfur trioxide in the flue gas formed ammonium bisulfate to block the air preheater. The clogging of air preheater caused by ammonium bisulfate has become the most troublesome problem in thermal power plants. There are endless ways to control the blockage of air preheater in various power plants, but most of the control focuses on removing the blockage ammonium bisulfate. In fact, the most fundamental solution is to reduce the ammonia escape rate of the denitrification system, try to reduce the ammonia escape amount of the denitrification system, reduce the ammonia hydrogen sulfate, and reduce the ammonia hydrogen sulfate product at the cold end of the air preheater. Only in this way can...

AI Technical Summary

Problems solved by technology

Such a sampling point has no actual and accurate NOx from the outlet of the reaction denitrification

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