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以大同烟煤为研究对象,在高温携带流模拟反应器上,利用平流火焰燃烧器制取真实富氧燃烧气氛下的煤焦,对不同停留时间下制取的煤焦进行工业分析,讨论停留时间对煤焦的燃尽率、固定碳和挥发份的含量的影响,当停留时间超过94 ms时,煤焦的各种参数保持不变。利用热重分析仪进行煤焦的燃烧实验,讨论不同O2/CO2(20/80、30/70和40/60)气氛对煤焦燃烧特性的影响,并采用Coats-Refern法计算煤焦的活化能和指前因子等动力学参数,460～660℃范围内,背景气氛O2/CO2为30/70时煤焦的活化能和指前因子数值最大,为进一步研究煤焦在富氧燃烧气氛中的燃烧反应提供理论依据。
Taking Datong bituminous coal as the research object, on the high-temperature carrying flow simulation reactor, a coke-flow flame burner was used to make the coal char under the real oxygen-rich combustion atmosphere. The industrial coke made from different residence time was analyzed and the residence time Burning rate of coal char, fixed carbon and volatile content, when the residence time exceeds 94 ms, coal char parameters remain unchanged. The effects of different O 2 / CO 2 (20/80, 30/70 and 40/60) atmospheres on the combustion characteristics of coal char were discussed using the thermal gravimetric analyzer. The Coats-Refern method was used to calculate the char reactivity In the range of 460 ~ 660 ℃, the activation energy and pre-exponential factor of coal char are the largest when the background O2 / CO2 is 30/70. In order to further study the char in the oxygen-rich combustion atmosphere The combustion reaction provides a theoretical basis.