The temperature field distribution inside a self-developed opposing spraying style low-temperature combustion chamber in low-temperature pyrolysis oven firing low-rank coal was simulated by CFD Fluent 6.3software.Moreover

the combustion chamber's structure was also optimized.The results show that

by designing four central axisymmetric straight dampers with length of 800 mm and 500 mm and rotation angle of±30°and ±10°

the horizontal and vertical average temperature of the combustion chamber can meet the demands of lignite low-temperature pyrolysis(500℃to 650℃).In non-premixed combustion mode with excessive air coefficient of 1.25 and the sprayer diameter of 50 mm

the combustions characteristics of the combustion chamber reached the optimum condition.The excessive air coefficient

fuel premixed mode and coal feed pipe diameter can affect the temperature field distribution in the combustion chamber.The k-εturbulence model

P-1radiation model and non-premixed combustion model were appropriate for calculating the temperature field distribution for the combustion of coke oven gas and air in the low temperature combustion chamber.The simulation results basically agreed with the experimental results

the error only fluctuated from 40℃to 80℃.Test on the exhaust gas shows the emitted flue gas satisfied the industrial emission standards.