“A Blue Carbon Sealing Discharge System of the Compound Furnace Coke Quenching Equipment” of Xi’an Coal Machinery Company was authorized by the utility model patent. “A Blue Carbon Sealing Discharging System for the Compound Furnace Coke Quenching Equipment” can automatically control the sealing discharging process of blue carbon sealing discharging system, effectively avoid the leakage of harmful gas.