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项目背景
There are three existing 2x630MW supercritical boilers. Before denitration, the NOx concentration is about 500mg/ Nm3, and the design value of low nitrogen +SNCR emission concentration is ≤150mg/ Nm3 (6% oxygen content in dry basis). In actual operation, the highest value is 200mg/ Nm3 (6% oxygen content in dry basis), which cannot meet the relevant requirements of ultra-low emission. At present, it is planned to carry out ultra-low emission on the boilers, aiming to reach the NOX emission concentration in the the level of 30~50mg/Nm3 (6% oxygen content in dry basis).
Datang binchang Power Generation Co., Ltd. 2×630MW Unit

出水标准

Adopt the latest national standard or general international standard

技术特点

SCR denitration efficiency is 80~90%;

When SCR is put into normal operation, the ammonia escape concentration of denitration device is 2.0～2.5 ppm;

When SCR is put into normal operation, the conversion rate of SO2/SO3 is less than 0.75%;

The availability rate of the whole denitration system is more than 98% in one year after the formal handover;

Under the condition of BMCR and the NOx concentration in flue gas: 500mg/Nm3 (standard state, dry basis, 6% oxygen), Party B shall ensure that the urea consumption of each furnace is ≤ 125kg/h (total consumption of SNCR and SCR system).

解决方案

Plus SCR on the basis of Low NOx + SNCR

取得效果

Make the NOx emission concentration in the reformed flue gas be <50mg/Nm3 (6% oxygen in dry basis).
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