GONG Xiaolong 1,2 , LIU Zhongliang 1 , JIANG Han 1 , LI Qingfang 3
(1.The Key Lab of Enhanced Heat Transfer and Energy Conservation of Ministry of Education & the Key Lab of Heat Transfer and Energy Utilization of Beijing City, Beijing University of Technology, Beijing 100124 China; 2. School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen Jiangxi 333403; 3.Sinopec Shengli Engineering & Consulting Co., Ltd., Dongying Shandong 257026, China)
Abstract: Burners based on submerged combustion devised in the traditional way had the problems of backfire, blow-off and unstabilized combustion in practical application. In this paper, a scheme for stabilizing the flame of natural gas was conceived, a series of theories behind the design of the combustion chamber for a submerged gas burner were put forward and an option of the chamber was devised. The proposed design of the combustion chamber employed the technique of flame stabilization based on swirling air flow. The primary air was swirl-premixed with gas fuel, and the secondary air cooled the outside wall of the combustion chamber and finally entered the chamber as combustion air after preheating. The overall design of the submerged combustion burner was also presented. A devised model was mounted onto a self -developed pressurized submerged combustion experiment rig for preliminary tests of burning stability and pollutants' emission. Results showed the model had good stability and yielded remarkable results of energy conservation and emission reduction.
Key words: stability; submerged burner; design; experimental study