火电站烟气脱硝大流量高速混合过程仿真研究

Simulation Research of Fast Mixing Process of Ultra-high Flow Rate in DeNox Reactor of Thermal Power Station

介绍了冷态模型与实物的比例为1:15冷模实验装置(FMT)的设计和应用过程,使之能与高速氨-烟气混合过程流态数值仿真相验证、指导脱硝反应器设计。应用相似模化原理,确立了FMT各参数和实际脱硝反应器各参数的对应关系,阐述了气体混合管道以及第一层模拟催化剂上表面速度分布测量和还原剂模拟气体混合气浓度分布测量的方案和结果,使混合效果得到了较大的提高,实验结果的速度分布、浓度分布和压力损失均达到目前的工艺要求。

The design and application of 1：15 Flow Model Test（FMT） equipment were introduced for validating numeric simulation for the flow state of high speed ammonia-smoke mixing process and guiding the design of real DeNOx reactor.Based on the simulation and modeling theory,the FMT design specifications were proposed according to the parameters of real DeNOx reactor.The design process of mixing pipe,blower system and the measuring principle and procedure of velocity and gas concentration distribution at the first layer of simulated catalyst were put into detail.The test for velocity and gas concentration distribution measurement as well as pressure drop check was done,which reached the recent technological requirements.