过热蒸汽袋式除尘器阻力特性研究

Study on resistance characteristics of superheated steam bag filter

过热蒸汽与高温、高湿烟气具有相似的特性,针对高温、高湿烟气袋除尘困难的问题,设计开发了过热蒸汽袋式除尘器,并试验分析了气体参数对其阻力的影响。结果表明,过热蒸汽袋式除尘器运行状况良好,除尘器阻力随进口气体温度的升高及蒸汽通入时间的延长呈"鱼钩曲线"变化;而蒸汽过热度增加,除尘器阻力减小。

Superheated steam has the same characteristics with the high-temperature and dense-moisture smoke. A superheated steam bag filter is designed according to the difficulty to collect high-temperature and dense-moisture smoke with bag filter, and the influences of the gas parameters on the pressure drop are analyzed by experiments. The results indicate that the superheated steam bag filter＇ s operation goes smoothly. Furthermore, the pressure drop of the filter changes as ＂fishhook curve＂ with the increase of the gas temperature at its entry and the time for the superheated steam to pass through; but the pressure drop declines with the increase of the overheat degree of the steam.