Abstract:

The convective heat transfer and radiation heat transfer of coke oven riser heat exchanger are calculated in one coking cycle.The averagecomprehensive heat transfer coefficient of heat exchanger is 52.8 W/(m2·K).In the whole coking process, the gas flow is fully developed, andthe radiation heat transfer has nothing to do with the flow state of the gas.In the later period of coking, the decrease of gas flow rate andthe decrease of heat transfer will result in the change of the wall temperature of the ascension pipe.In the late coking period, the sudden change of temperature in the inner wall can be reduced by strengthening the radiation heat transfer between the crude gas and the inner wallof the riser and increasingthe flow rate of the crude gas properly.