脱硫塔-湿式电除尘器一体化设备气流组织与优化

AIR FLOW DISTRIBUTION AND OPTIMIZATION FOR DESULFURIZATION TOWER-WET ELECTROSTATIC PRECIPITATOR INTEGRATED EQUIPMENT

气流分布对脱硫塔-湿式电除尘器一体化设备的除尘效率以及SO_3酸雾和PM_(2.5)的去除具有重要意义,通过数值模拟试验,对1台130 t/h循环流化床锅炉脱硫塔-湿式电除尘器一体化设备内部流场进行系统分析。结果表明:通过在集液斗导流叶片上部和湿式电除尘器进口喇叭段添加导流板可使流场变得均匀,电场进口断面气流分布相对均方根满足要求;将管式湿式电除尘器中超过一定烟气流量偏差的阳极管数量控制在一定范围内,保证出口烟气含尘浓度达到设计目标。

The air flow distribution is of great significance for dust removal efficiency and the removal of SO3 acid mist and PM2.5 of the desulfurization tower-wet electrostatic precipitator(WESP) integrated equipment. A systematic analysis on internal flow field of desulfurization tower-wet electrostatic precipitator integrated equipment for 130 t/h circulating fluidized bed boiler was carried out by numerical simulation test in this paper. The results showed that adding air deflectors to the upper part of the guide vane of liquid colleting bucket and the horn section in inlet of WESP could make the flow field be uniform, and ensure the relative root mean square of airflow velocity in the inlet section of electric field met the requirements; and could ensure the number of anode tubes exceeding a certain flue gas flow deviation in a tubular wet electrostatic precipitator was controlled in a given range, thus to ensure that the dust content in the outlet flue gas reached the design target.