Experimental study on the premixed lean-burn in alumina particles based porous burner. (November 2021)

• Record Type: Journal Article
• Authors: Li, Lei; Sun, Zhongguang; Luo, Yongjiang; Liang, Yunpei; Wang, Xinyu; Wang, Kequan
• Is Part Of: Energy reports. Volume 7(2021)
• Page Start: 7434
• Page End: 7444
• Publication Date: 2021-11
• Subjects: Low-concentration methane -- Premixed combustion -- Lean-burn -- Porous burner; Power resources -- Periodicals; Energy industries -- Periodicals; Power resources; Periodicals; Electronic journals; 621.04205
• DOI: 10.1016/j.egyr.2021.10.101
• Languages: English
• ISSNs: 2352-4847

Abstract

Abstract: Coal mine methane (CMM) emissions from underground coal mines is becoming a global problem since it produces greenhouse gas contributing to global warming. It is critical to reduce low-concentration CMM(LCM) and ventilation air methane (VAM) emissions, which has become the focus to be solved urgently. One of the methods is utilizing this VAM as a fuel by mixing of CMM with the help of the porous burning system. In order to optimize the performance of a porous burning system composed of alumina particles, a series of complex porous media burners composed of two layers of alumina particles were proposed, after which a laboratory experimental system based on these burners was built. The lean-burn limits, lean-burn stabilization temperature and lean-burn fluctuation patterns of the burners built in this study were tested and reported in this paper. Results show that cylindrical burner with equal segment length of 3 mm diameter alumina particles at the upstream and 6 mm diameter alumina particles at the downstream is suitable for lean-burn with low flow rate, and cone burner with equal segment length of 3 mm diameter alumina particles at the upstream and 6 mm diameter alumina particles at the downstream is more suitable for lean-burn with high flow rate and low methane concentration, and the lean-burn limits for cone burner with volume methane concentration of 1.5% is obtained, which is the lowest lean-burn limit have reported at present.