摘要
在炉排式生活垃圾焚烧炉的运行过程中,由于料层的通风阻力存在不均匀性,导致一部分一次风在经过炉排时未能起到干燥和助燃料层的作用便直接进入炉膛,形成一次风短路现象。为研究这种现象对焚烧炉燃烧特性的影响,采用数值模拟方法对短路与非短路工况进行了对比分析。模拟结果显示,一次风短路会降低垃圾料层的干燥速度与固相燃烧速度,使料层的燃尽位置后移;短路的一次风可为炉排附近的气相燃烧补充氧气,使局部燃烧强度增加,但短路与非短路工况下的可燃气体燃烧效果差异较小,风短路现象对炉内气相燃烧积极影响有限。
Because of the uneven ventilation resistance of the waste bed,a part of primary air went into the furnace directly instead of drying the waste or supporting solid-state combustion during the operation of grate type MSW incinerator,which phenomenon is called primary air short-circuit.In order to research the effects of primary air short-circuit,the incinerator operation conditions with and without short-circuit were compared and analyzed by numerical simulation.The results indicate that primary air short-circuit reduces the drying speed and solid combustion speed of the waste,and the short-circuit air provides more oxygen to the gas combustion near the grate than the condition without short-circuit,but the enhancement of gas combustion caused by primary air short-circuit is very limited in total.
作者
潘扬
罗翠红
Pan Yang;Luo Cuihong(GZEPI Design and Research Institute Co.,Ltd.,Guangdong Province Engineering Laboratory for Technology and Equipment of Waste Incineration,Guangzhou 510330,China)
出处
《广东化工》
CAS
2020年第3期26-28,35,共4页
Guangdong Chemical Industry
关键词
垃圾焚烧炉
一次风短路
数值模拟
垃圾料层
流场
MSW incinerator
primary air short-circuit
numerical simulation
waste bed
flow field
作者简介
潘扬(1991-),男,南京人,硕士,助理工程师,主要研究方向为垃圾焚烧与余热利用。
