褐煤燃烧阶段风量对指标气体的影响  

Influence of air amount on index gas for lignite combustion

作　　者：周西华[1,2] 王成 李昂[1,2] 白刚[1,2] 郭晓阳[1,2] 

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]矿山热动力灾害与防治教育部重点实验室,辽宁阜新123000

出　　处：《洁净煤技术》2017年第5期18-22,27,共6页Clean Coal Technology

基　　金：国家自然科学基金资助项目(51274115;51274113);辽宁省教育厅基金资助项目(L2012122)

摘　　要：以平庄瑞安褐煤为研究对象,通过热重试验确定褐煤燃烧阶段温度范围,利用管式炉程序升温系统进行煤样氧化自燃试验,得到风量分别为40、80、120、160和200 m L/min条件下的气体;为确定优选指标气体的关联度大小,采用灰色关联法对其进行分析。结果表明:褐煤燃烧阶段温度为247~433℃,408℃左右达到快速燃烧状态。当风量恒定时,CO_2/ΔO_2、CO/ΔO_2、C_2H-4与温度的关联度比CO、C_2H_6、C_2H_4/C_2H_6高。随风量不断增加,指标气体与温度的关联度:CO_2/ΔO_2最大,其次是CO/ΔO_2、C_2H_4和CO,C_2H_6和C_2H_4/C_2H_6最小。故可将CO_2/ΔO_2、CO/ΔO_2和C_2H_4作为主要指标,CO作为辅助指标用于预测煤矿井下封闭火区燃烧状态。Brown coal of Pingzhuang at Ruian was taken as the sample, the temperature range of the coal during combustion stage was determined by thermo gravimetric test, and the spontaneous combustion experiment was carried out by using tube furnace heating system. Ga- ses were obtained at 40,80,120,160 and 200 mL/min of air volume respectively. In order to determine the correlation degree of the opti- mal index gas, the gray correlation method was used to analyze the gas. The results show that the temperature of the lignite combustion stage is 247-433℃, and the rapid combustion state is achieved at about 408℃. When the air volume is constant, the correlation degree of temperature of CO2/AO2, CO/AO2 and C2 H4 is higher than that of CO, C2 n6 and C2 H4/C2 H6. With the increase of air volume, the correlation between gas and temperature is：CO2/AO2 is the largest, followed by CO/AO2, CzHa and CO, C2H6 and C2H4/CzH6 are the smallest. So CO/AO2,CO/AO2 and C2H4 can be used as the main quota,CO is used to predict the coal mine closed fire zone combustion status.

关 键 词：褐煤燃烧 热重 程序升温 灰色关联度 

分 类 号：X936[环境科学与工程—安全科学]