Conventional coke ovens produce very little raw gas at the end of coking, under the action of thermal buoyancy, negative pressure is inevitable at the bottom of the oven chamber, which is easy to suck air from the outside and cause combustion, resulting in ablation of coke, burning loss of oven wall graphite seal, high temperature of oven top and other adverse conditions; In addition, in order to solve the problem of smoke at the oven door, charging hole and AP caused by the instantaneous surge of a large amount of raw gas during charging, Dalian Pu Cheng Control System Co.,Ltd. develops the single chamber pressure regulation system ( referred to as SCPR system) .