浸没式燃烧器火焰稳定性的实验研究  

Experimental Study on Flame Stability of Submerged Burner

作　　者：刘江涛[1] 李清[1] 杨东升[2] 康凤立 LIU Jiangtao LI Qing YANG Dongsheng KANG Fengli

机构地区：[1]北京市燃气集团有限责任公司,北京100035 [2]北京建筑大学北京市供热供燃气通风及空调工程重点实验室,北京100044

出　　处：《煤气与热力》2017年第4期50-53,58,共5页Gas & Heat

基　　金：北京市科学技术委员会项目<城市燃气站运营安全与节能关键技术研发及应用>中子课题"高中压调压站冻堵;冻胀对安全运行影响分析及应对措施"(D151100005515002)

摘　　要：分析浸没式燃烧器燃烧功率为160 k W,浸没深度分别为1.0 m、0.7 m和0.4 m,燃烧室压力波动对火焰稳定性的影响。理论分析可知,当燃气进气压力和空气进气压力不同时,燃烧室压力的波动引起空燃比变化,严重时将超出可燃范围,从而导致熄火。通过实验研究分析得到火焰不稳定的原因是浸没燃烧的燃烧室压力波动幅度较大。实验还表明在保证燃气完全燃烧的情况下,增大燃气体积分数有助于燃烧的稳定性。The influence of combustion chamber pressure fluctuation on flame stability at submerged burner power of 160 kW and different submergence depths of 1. 0 m, 0. 7 m and 0. 4 m is analyzed. Through theoretical analysis, it is found that the combustion chamber pressure fluctuation causes the change in air-fuel ratio when the gas inlet pressure is different from the air inlet pressure. In severe cases, the air-fuel ratio may exceed the flammable range, thus leading to flameout. The experimental analysis shows that the reason for the instability of flame is the superior combustion chamber pressure fluctuation amplitude. The experimental results also show that increasing the gas volume fraction contributes to the stability of the combustion when the gas achieve complete combustion.

关 键 词：浸没式燃烧器 压力波动 火焰稳定性 实验研究 

分 类 号：TU996.7[建筑科学—供热、供燃气、通风及空调工程]