大庆油田热电厂620t／h褐煤锅炉制粉系统采用风扇磨煤机直吹系统，干燥介质采用炉烟与热风。抽取炉烟的烟管为耐热铸钢，抽烟口混合室与水冷壁之间设置滑板机构，其余管段采用插入式或滚珠式三向补偿器。在锅炉运行中，由于设计和设备自身原因，抽烟管道出现的问题有：抽烟口混 The 620t / h lignite boiler pulverizing system of Daqing Oilfield Thermal Power Plant adopts the fan pulverizer direct blowing system, and the drying medium adopts the flue gas and hot air. Smoking pipe smoke pipe heat-resistant cast steel, smoking mouth mixing chamber and the water wall set up between the skateboarding agencies, the rest of the pipe segment using plug-in or ball three-way compensator. In the boiler operation, due to the design and equipment of their own reasons, smoking pipe problems are: smoking