GONG Xiaolong ¹, ZHU Qingxia ¹, FENG Qin ¹, LIU Zhongliang ², JIANG Han ²
(1. College of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China; 2. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China)

Abstract: Benefits and disadvantages of conventional submerged combustion technology are expatiated, and pressurized submerged combustion device with higher efficiency and less pollution is newly developed. In order to investigate the effect of pressure on combustion characteristics, numerical simulation of methane-air flame under 5 and 30 atmospheres in an axisymmetric chamber is carried out by means of a Fluent software. The results show that the increases of pressure accelerate the reaction rate of air and methane and make the fuel burn abundantly, enhancing the combustion performance: the position of combustion commencement moves towards the upstream of the air; the top flame temperature increases, so do the CO₂ and NO_X concentrations. The computed results are in good agreement with the predictions from previous studies. It’s proved that high pressure combustion burner is very suitable for pressurized combustion evaporator.

Key words: pressurized submerged combustion; high pressure; burner; numerical simulation