Boiler air heat exchange device

The invention discloses a boiler air heat exchange device which comprises air ducts and an air preheater (1), the air duct located at one side of the air preheater (1) and connected with a fan is a cold air duct (22), the air duct located at the other side of the air preheater (1) and connected with a boiler or powder making equipment is a hot air duct (21), the hot air duct (21) and the cold air duct (22) communicate with each other through an air branch bin of the air preheater (1), the device further comprises at least one heat pipe heat exchanger (4), the evaporation section of the heat pipe heat exchanger (4) is located in the hot air duct (21), and the condensation section of the heat pipe heat exchanger (4) is located in the cold air duct (22). According to the boiler air heat exchange device, the problem that the air preheater (1) is blocked due to adhesion of ammonium bisulfate can be solved, and the heat exchange stability is guaranteed. 本发明公开一种锅炉空气热交换装置，包括风道和空气预热器(1)，位于所述空气预热器(1)一侧、并与风机连接的所述风道为冷风道(