Power plant boiler hot primary air cooling device

The utility model discloses a hot primary air cooling device of a power plant boiler, which is connected with an outlet of an air preheater in a boiler air cooling system and comprises two groups of air coolers and two groups of low-pressure heater pipelines, and the two groups of air coolers are connected with the two groups of low-pressure heater pipelines through condensed water pipeline components. The hot primary air cooling device of the power plant boiler can solve the problem of coal blending combustion, optimizes a coal mill pulverizing system, enables the temperature of hot primary air for pulverized coal feeding to be reduced from the outlet temperature of the air preheater to the safe temperature, and guarantees safety and economical efficiency of the boiler after bituminous coal blending combustion. 本实用新型公开了一种发电厂锅炉热一次风冷却装置，与锅炉风冷系统中的空气预热器的出口连接，该发电厂锅炉热一次风冷却装置包括两组风冷却器和两组低加管道，所述两组风冷却器通过凝结水管道组件与两组低加管道相连接。本实用新型的发电厂锅炉热一次风冷却装置可以解决燃煤掺烧问题，优化磨煤机制粉系统，使送粉的热一次风从空气预热器出口温度降低到安全温度，保证掺烧烟煤后锅炉的安全性和经济性。