Practice on Economical Operational of Low NOx Combusting and Denitrification
SCR denitrification system with low NOx combusting applies to 2×300 MW fuel heat addition units'denitrification mechanism in Wujing Thermal Power Plant of Shanghai Electric Power Co. , Ltd. By introducing Chemical reaction mechanism of SCR, reactor installation position, sectional air combustion technology and low NO, combustion conditions and operating test, this essay proves an effective way for sectional air low NOx burner to reduce NO~ production, the load of SCR and consumption of NH3, which is control air volume in primary combustion zone effectively, and under the same air flow conditions, increasing air volume and air distribution distance of SOFA of being horizontally swing. When burning low value coal and the coal of poor grindability, it needs to low secondary air volume for improving primary air relatively. With a primary air automatic real-time correction for secondary air is an effective way to realize automatic adjustment of low NOx combustion. Reducing difference between secondary air and furnace pressure properly could effectively prevent secondary air distributing unevenly and control the primary combustion zone air volume.
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