Hot Air Circulation System:
The hot air system consists of equipment and structural components such as the hot air furnace, combustion device, air preheater, air fan, gas pipeline, ignition gas pipeline, combustion air duct, inlet air duct, return air duct, exhaust gas duct, valves, expansion joints, as well as electrical and control systems.
Working Principle:
Gas is burned in the combustion furnace with an appropriate amount of preheated air supplied by the air fan. After combustion in the hot air furnace, the flue gas mixes with the return air delivered by the high-temperature fan in the volute mixing chamber at the rear of the hot air furnace. The resulting hot air, under the combined action of the positive pressure in the high-temperature air duct and the negative pressure at the furnace rear, enters the hot air inlet of the retort furnace through the air inlet. After indirect heat exchange with the material through the furnace wall, it enters the suction inlet of the high-temperature fan via the return air duct to participate in recirculation. An exhaust gas duct is arranged between the outlet of the high-temperature fan and the mixing chamber of the hot air furnace to discharge the exhaust gas from the system to the outside. After recovering part of the waste heat through the air preheater, the exhaust gas is discharged through the chimney.
