多孔介质燃烧器最优启动负荷的实验研究  

Experimental Study on Optimal Start-up Load of Porous Media Burners

作　　者：顾玉强 陈园园 张上兵 孙颖楷 GU Yuqiang;CHEN Yuanyuan;ZHANG Shangbing;SUN Yingkai

机构地区：[1]广东万和新电气股份有限公司,广东佛山528325

出　　处：《煤气与热力》2024年第8期37-42,共6页Gas & Heat

摘　　要：采用完全预混多孔介质燃烧器,探究了多孔介质厚度、材料、孔径等因素影响下,多孔介质燃烧器的最大启动负荷、进入无焰燃烧的时间和最大稳定负荷。启动负荷影响燃烧器的运行状态,合适的启动负荷可以实现多孔介质燃烧器的无焰燃烧。对于所研究的燃烧器,在不同多孔介质厚度、孔径、材料类别及布置方式的情况下,进入无焰燃烧的最大启动负荷变化不大,为7~8 kW。燃烧器进入无焰燃烧的时间在不同影响因素下,差异显著。适当减小多孔介质的厚度、缩小上游多孔介质的孔径以及使用低辐射系数的多孔介质,都使得进入无焰燃烧的时间变短。在不同影响因素下,燃烧器可以保持无焰燃烧的最大稳定负荷变化较大。上游碳化硅、下游氧化铝多孔介质的布置方式,即使用发射率更低的下游材料,也可以得到更大的最大稳定负荷。Using a fully premixed porous media burner,the maximum start-up load,time to enter flameless combustion and maximum stable load of the porous media burner were investigated under the influence of factors such as porous media thickness,material and pore size.The start-up load affects the operating status of the burner,and an appropriate start-up load can achieve flameless combustion of porous media burners.For the burners studied,the maximum start-up load into flameless combustion does not vary significantly,ranging from 7 kW to 8 kW,under different porous media thicknesses,pore sizes,material types and arrangement methods.The time for the burner to enter flameless combustion varies significantly under different influencing factors.Properly reducing the thickness of porous media,reducing the pore size of upstream porous media,and using porous media with low radiation coefficients all shorten the time to enter flameless combustion.Under different influencing factors,the maximum stable load that the burner can maintain flameless combustion varies significantly.The arrangement methods of upstream silicon carbide and downstream alumina porous media,that is,using downstream materials with lower radiation coefficients,can achieve a larger maximum stable load.

关 键 词：多孔介质燃烧器 无焰燃烧 启动负荷 SiC多孔介质 Al_(2)O_(3)多孔介质 

分 类 号：TK223.2[动力工程及工程热物理—动力机械及工程]