成为全球最令人满意的能源与环境企业
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).
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).
