电袋复合除尘器在循环流化床锅炉的应用效果研究  

Study on the application effect of electrostatic-fabric integrated precipitator in circulating fluidized bed boiler

作　　者：李枭鸣 LI Xiaoming(Fujian Longking Co.,Ltd.,Longyan 364000,Fujian China)

机构地区：[1]福建龙净环保股份有限公司,福建龙岩364000

出　　处：《电力科技与环保》2024年第5期544-551,共8页Electric Power Technology and Environmental Protection

基　　金：国家重点研发计划项目(2022YFC370150402)。

摘　　要：为了解和提升电袋复合除尘器在循环流化床锅炉应用的减排效果,通过一定的筛选方法和调研参数的选取,本文对应用于10台不同规格循环流化床锅炉的电袋复合除尘器的运行情况进行调研统计及研究,并考察了电袋复合除尘器在某2×300 MW典型循环流化床锅炉机组上的运行情况。研究结果表明:10台电袋复合除尘器进口粉尘浓度为14.8~69.0 g/m^(3),出口粉尘浓度均低于10 mg/m^(3),其中3台低于5 mg/m^(3),占比30%,说明电袋复合除尘器对于进口粉尘浓度高或者低均适用;设备运行阻力最大值为1100 Pa,最小值为580 Pa,平均值为843 Pa,平均值均优于国家标准要求的运行阻力(≤1200 Pa)30%;滤袋使用寿命平均值为9.2 a,整体大幅优于设计使用寿命;通过对某2×300 MW典型循环流化床锅炉机组研究发现,该烟气工况具有烟温高、进口粉尘浓度高、粉尘高比电阻等特性,但仍然可以确保除尘器出口粉尘排放长期稳定保持在10 mg/m^(3)以下,除尘器运行控制在800 Pa以下。该电袋复合除尘器已稳定运行14 a,滤袋进行过一次更换,更换前滤袋使用寿命达10 a,是预期寿命2倍以上。电袋复合除尘器在循环流化床锅炉及除尘难度大的工况中具有良好的减排节能效果。Through the selection of certain screening methods and the selection of investigation parameters of the electrostatic-fabric integrated precipitator,the operation of the electrostatic-fabric integrated precipitator corresponding to 10 circulating fluidized bed boilers with different specifications was determined.The results showed that the inlet dust concentration of 10 electrostatic-fabric integrated precipitators ranged from 14.8 g/m^(3)to 69.0 g/m^(3),the outlet dust concentration was lower than 10 mg/m^(3),and 3 sets were lower than 5 mg/m^(3),accounting for 30%,indicating that the electrostatic-fabric integrated precipitators were suitable for high or low import dust concentration.The maximum value of the operating resistance of the equipment was 1100 Pa,the minimum value was 580 Pa,and the average value was 843 Pa,all of which were better,and the average value was better than the operating resistance required by the national standard≤30%of 1200 Pa;The average service life of the filter bag was 9.2 a,which was significantly better than the design service life.In addition,through the study of a 2×300 MW typical CFB boiler unit,it was found that the flue gas working condition had the characteristics of high smoke temperature,high dust concentration at the inlet and high dust specific resistance,but it could still ensure that the dust emission at the outlet of the precipitator was stable for a long time below 10 mg/m^(3),and the operation of the precipitator was controlled below 800 Pa.The electrostatic-fabric integrated precipitator had been running stably for 14 a,and the filter bag had been replaced once,and the service life of the filter bag had reached 10 a before replacement,which was more than 2 times the expected life.It showed that the electrostatic-fabric integrated precipitator had good effect in the circulating fluidized bed boiler and the difficult dust removal condition.

关 键 词：循环流化床锅炉 电袋复合除尘器 粉尘排放浓度 运行阻力 滤袋使用寿命 

分 类 号：TK223.27[动力工程及工程热物理—动力机械及工程] X773[环境科学与工程—环境工程]