Discharge gas burning central heating unit

The utility model technically relates to a waste gas burning centralized heating device, which comprises a furnace body, a combustion chamber, a main smoke pipe, a tube type heat exchanger and a bottom seat. The utility model is characterized in that the furnace body is connected with the bottom seat, the combustion chamber is arranged at one end inside the furnace body, the main smoke pipe is connected with the combustion chamber, the tube type heat exchanger is encircled outside the main smoke pipe, an automatic combustor is arranged on the furnace body, a waste gas inlet opening and a maintain opening are arranged at the other end of the furnace body, and an electric adjusting valve is arranged on one side of the maintain opening. Two hot resisters are fixed at the front end and the rear end of the furnace. A thermoelectric couple is fixed and connected on the combustion chamber. The waste gas processing capacity is large, the purification ratio is high, and the purification ratio of the waste gas processi