Open AccessStudy on Dynamic Heat Transfer Process of Waste Gas in Coke Oven Riser Coking Cycle
Author(s) -
Huang Hai-qing,
Shenghua Zou
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/384/1/012155
Subject(s) - waste heat recovery unit , heat transfer , waste heat , waste management , heat exchanger , shell and tube heat exchanger , heat transfer coefficient , plate heat exchanger , heat recovery ventilation , thermodynamics , materials science , environmental science , engineering , physics
Waste heat recovery of waste gas in rising tube is a complex heat transfer process, and this paper analyses and studies the heat transfer problem of the coke hoist heat exchanger in 1 coking cycle by theoretical derivation and numerical calculation. Based on the thermal balance equation, the heat transfer differential equation of the gas flow of the rising tube is derived, the mathematical model of heat transfer for waste gas waste heat recovery is established, and the heat transfer and heat transfer coefficient of the coke oven rising tube heat exchanger in 1 coking cycle are obtained. In 1 coking cycle, the heat transfer of waste gas fluctuates in 1 coking cycle, and the heat transfer of waste gas in the rising tube is 19 to 26 kW, with an average heat transfer coefficient of 30 to 36 W/(m2·K). In the late coking, with the decrease of waste gas flow and the decrease of heat transfer, it will cause the temperature of the rising tube wall to change, and the gas flow should be maintained in the late stage of coking to prevent the phenomenon of sudden change of the inner wall temperature; In the actual production can be several coke ovens in parallel production, and the flow and temperature of waste gas timely monitoring, so that the flow of waste gas control at 800m3/h, improve the efficiency of waste gas waste heat recovery.