管式湿式电除尘器气流分布的组织与优化

Organization and optimization for gas flow distribution of tubular W-ESP

管式湿式电除尘器可看作由多个线管式电除尘器并联组成,若各电除尘器之间处理烟气流量偏差过大,将导致湿式电除尘器总的除尘效率下降。采用CFD数值模拟技术,对某热力公司116 MW锅炉配套管式湿式电除尘器的内部气流分布进行研究分析,并对气流分布进行组织与优化。在电场进口断面气流速度分布满足相对均方根指标要求的基础上,将各单管处理烟气流量偏差控制在一定范围之内,以保障湿式电除尘器达到规定的排放要求。现场测试结果表明,出口粉尘浓度满足项目技术规范规定的排放要求,数值模拟结果可指导管式湿式电除尘器设计。

Tubular W-ESP is composed The efficiency will decrease if the gas flow of multiple wire-pipe electrostatic deviation becomes too large. CFD precipitators connected in parallel. numerical simulation technology was used to analyze, organize, and optimize the internal air flow distribution of the 116 MW unit supporting the W-ESP of a heating power company. Upon meeting the requirements of the gas flow distribution of the electrostatic pre- cipitator,the gas flow deviation of the single tube was controlled within a certain range in order to ensure that W- ESP could meet the requirements of emission standards. The test results showed that outlet dust concentration ful filled these emission requirements. Furthermore,the numerical simulation method provided a reference for tubular W-ESP design.