In order to reach the requirements of ultra-low emission of nitrogen oxides,polymer non-catalytic reduction(PNCR)process was added to the original selective non-catalytic reduction(SNCR)process in a waste incineration power plant to form a combined denitrification process of SNCR+PNCR+flue gas recycling.The combined process ensured the effluent concentration of nitrogen oxides ≤100 mg/m3 and reasonably reduced the cost of denitrifier as well achieving better economic and social benefits.In order to solve the probem of unstablility of the combined denitrification process,the operation mode of a fixed amount of PNCR solid denitrifier and dynamic adjustment of SNCR urea addition was adopted,and the effluent of nitrogen oxides have stably reached the standard for more than 3 years operation.The results of this study provide technical references for the upgrading and operation of denitrification process for waste incineration power plants.
维普
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