Study on the coal consumption and pollutant discharge characteristics of coalfired units participating in deep peakregulating operation in Anhui Province

Abstract

Abstract:

Because of the power structure of installed units and status quo of clean energy in Anhui Province,coalfired units participate in deep peakregulating operation regularly.Taking 94 coalfired units as study objects, pollutant mass concentration in flue gas, variation trend of coal consumption for power supply and peak shaving compensation capacity are analyzed. The results show that the levels of pollutant emission and coal consumption for power supply of coalfired units in Anhui Province rank on the top of China.During deep peakregulating operations , the NOx mass concentration in flue gas may exceed standard due to the suspension of ammonia injection which results from the flue gas temperature at the denitrified inlet being lower than the minimum operating temperature of the catalyst.The problem can be solved by choosing lowtemperature SCR catalyst, setting flue gas bypass for the economizer, separating the flue duct and updating the economizer in stages.The coal consumption for power supply changing with the load rate is a convex curve, and it increases more rapidly as the the load rate decreases. It indicates that the operating economy of the unit participating in the deep peakregulating operation is significantly reduced. After calculating the added cost of peakshaving, taking classified quotation, and setting energysaving and emissionreduction coefficient formulas, a peakshaving auxiliary service market is established to compensate the power generation enterprises that actively participate in deep peakregulating operation.

Key words:

MA Dawei1，WANG Zhengfeng2，HE Jun1，HUANG Qishun1，CHEN Jian1，ZHANG Benyao1，WU Xu2，CONG Xingliang1.

Study on the coal consumption and pollutant discharge characteristics of coalfired units participating in deep peakregulating operation in Anhui Province [J]. Huadian Technology, 2019, 41(12): 1-7.

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Study on the coal consumption and pollutant discharge characteristics of coalfired units participating in deep peakregulating operation in Anhui Province

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