Recovery system and method for self-loading heat of discharged materials of industrial kiln

The invention provides a recovery system and method for self-loading heat of discharged materials of an industrial kiln, and belongs to a waste heat utilization technology. A draught fan, a cold air inlet valve, a discharge heat exchanger, a discharge port, the kiln, a kiln air inlet, a bypass valve, a hot air outlet valve and a dust remover are included; and the cold air inlet valve and the bypass valve are connected to an outlet pipe of the draught fan, at least one air inlet matched with the discharge heat exchanger is arranged on an outlet pipe of the cold air inlet valve, and an outlet ofthe bypass valve is connected with an inlet pipe of the kiln air inlet and an outlet pipe of the hot air outlet valve. By means of the recovery system and method, air is used as a heat exchange medium, high-temperature hot air obtained after heat exchange is blown into the kiln to be directly mixed with fuel for combustion, a traditional heat recovery method and a traditional heat utilization form are changed, the heat r