典型机组低温段热管式空预器投运问题及解决措施

Operational Problems of Heat-pipe Air Preheater in Low-temperature Section of Typical Unit and Their Solutions

热管式空预器目前已经得到了广泛应用,特别是在电力工业和化工工业等方面,表现出较高的应用价值。但是其在运行过程中还存在压差较高和堵塞的问题。以华电潍坊潍坊发电有限公司3#机组为实例,对热管式空预器压差高及堵塞原因进行了分析,并给出了相应的解决措施。改进后系统运行表明,改进方案的应用在降低空预器压差和防止堵塞的同时,还能减少排烟热损失,提高锅炉效率。

The heat-pipe air preheater has been widely used,especially in the power industry and chemical industry,showing high application value.However,there are still problems of high differential pressure and blockage during operation.Taking the 3#unit in Huadian Weifang Power Generation Co.,Ltd.as an example,this paper analyzed the causes of high differential pressure and blockage of the heat-pipe air preheater,and proposed corresponding solutions.The operation of the improved system shows that the application of the improved scheme can reduce the differential pressure of the air preheater and prevent blockage,while also reducing heat loss due to exhaust gas and improving boiler efficiency.