关键词: 褐煤热解, 干馏炉, 旋流式燃烧室, CFD模拟, 低温焦油

Abstract: CFD Fluent 6.3 software was used to perform simulation research and structure optimization on temperature distribution in the lignite swirling low-temperature combustion chamber (1500 mm× 200 mm×1500 mm). This combustion chamber was a separate unit to complement the lignite low-temperature pyrolysis carbonization chamber. By designing two 100mm radius and 130° arc-shaped baffles symmetrical with the center of the combustion chamber in the coordinates of (?25，550，0) and (25，?550，0)，the average temperature of the combustion chamber (755 ℃) could meet the needs of lignite low-temperature pyrolysis (500—650 ℃). Realizable k-ε turbulence model，P-1 radiation model and non-premixed combustion model were used to calculate the temperature distribution. The simulation results were consistent with the experiment，and error fluctuation was 50—70 ℃.

Key words: lignite pyrolysis, retort, swirling combustion chamber, CFD simulation, low-temperature pyrolysis tar