垃圾焚烧炉低氮燃烧优化及数值模拟研究

Optimization and Numerical Simulation of Low Nitrogen Combustion in Waste Incinerator

主要分析了垃圾焚烧炉低氮燃烧技术及其优化应用,并做了SNCR脱硝数值模拟探究,结果发现,以SNCR脱氮工艺与低氮燃烧技术为载体,既可实现氮氧化物排放达标,又可减少运行时氨水与尿素的用量,还可关闭SNCR系统;对比不同含量的氨水与尿素,尿素对焚烧炉的影响更大,焚烧炉效率下降也更明显,能耗也更大,因此就焚烧炉能效而言,以氨水作为还原剂效果更佳;在负荷增加趋势下,SNCR脱硝后焚烧炉尾部烟道排放的氮氧化物浓度随之迅速减小,呈现明显下降状态。

The low nitrogen combustion technology and its optimization application of waste incinerator were mainly analyzed, and the NUMERICAL simulation of SNCR denitrification was conducted. The results showed that with THE SNCR denitrification process and low nitrogen combustion technology as the carrier, the incinerator can not only meet the nitrogen oxide emission standards, but also reduce the amount of ammonia and urea during operation, and can also shut down the SNCR system.Compared with urea of any content of ammonia, urea has a greater impact on incinerator, incinerator efficiency drops more obviously, and energy consumption is also greater. Therefore, in terms of energy efficiency of incinerator, ammonia water as reducing agent has a better effect.Under the trend of increasing load, the nitrogen oxide concentration from the tail flue of the incinerator decreases rapidly and shows a significant decline after SNCR denitrification.