含尘烟气换热除尘一体化性能试验研究

Experimental Study on the Integrated Performance of Heat Exchange and Dust Removal of Industrial Flue Gas

为了去除工业外排烟气中的微细粉尘,同时回收余热。首次提出单独利用微型旋风分离器对含尘烟气进行换热除尘一体化的试验研究。通过研究旋风分离器的进气速度、排气管插入深度、压降、粉尘浓度、进气温度、冷却介质流量等关键因素,确定符合实际工况的最佳工艺参数。研究结果表明,随着进气速度的增加,除尘效率先增加后减少,在速度为32 m3/h时达到最大。当排气管插入深度与入口高度之比在1.1左右时,除尘效率达到最大。换热效率均随着进气速度、进气温度、冷却介质流量的增加而逐渐降低。

In order to remove the fine dust of industrial flue gas,and recover the waste heat at the same time.we put forward an experimental study on the integrated performance of heat exchange and dust removal of industrial flue gas by cyclone for the first time.The key factors such as the inlet velocity,the insertion depth of the exhaust pipe,the pressure drop,the dust concentration,the inlet temperature and the flow rate of the cooling medium were studied to determine the optimum parameters.The results show that,with the increase of air inlet velocity,the dust removal efficiency increases at first and then decreases,reaching the maximum at32m3/h.When the ratio of the depth of the exhaust pipe to the inlet height is about1.1,the dust removal efficiency reaches the maximum.With the increase of air inlet velocity,inlet temperature and the flow rate of the cooling medium,the heat transfer efficiency decreases gradually.