The waste heat recovery system for raw gas in the risers of the 2×55-hole 6-meter top-charging coke ovens in the East Area of the Steel Coking Plant started the installation and debugging phase in early May 2018. By November 22, all 110 holes were put into normal operation. Currently, the system is running stably, and the steam output far exceeds the design expectation. The average working pressure of the steam drum is 1.5-1.8 MPa (design pressure: 2.5 MPa), and the saturated steam output of the system reaches more than 18 T/h, achieving an improvement in the steam grade from the heat recovery of raw gas. The steam production pressure can reach 2.5 MPa, and the heat recovered per ton of coke is much higher than that of coke oven waste heat recovery in the same industry. 

In the early stage of system installation, due to the misoperation of thermal insulation workers, one riser ruptured. It has now been repaired and has been running stably for more than two months。