Device for recovering waste heat of chimney of bulk curing barn

The utility model discloses a bulk curing barn chimney waste heat recovery device which is composed of a heat exchange chamber, a cold air inlet, a hot air return duct, a chimney pipe and a Z-shaped chimney connecting pipe, and the Z-shaped chimney connecting pipe enables the heat exchange chamber and a hearth radiator in a bulk curing barn heating chamber to be conveniently and tightly connected together. An air outlet of the hot air return duct is connected with a hot air inlet of the roof of the bulk curing barn, an automatic cold air door is installed, and the bulk curing barn is controlled through an automatic bulk curing controller, so that the chimney smoke exhaust waste heat recovery system in the curing process of the bulk curing barn is formed. The device can effectively recycle chimney smoke exhaust heat in the tobacco leaf curing process of the bulk curing barn, reduce the smoke exhaust temperature of a chimney opening, improve the temperature of cold air entering a tobacco loading chamber of the