气氛和压力对脱灰煤颗粒着火温度的影响  

Influence of atmosphere and pressure on the ignition temperature of demineralized coal particles

作　　者：孟顺[1] 吴江全[1,2] 孙绍增[1,2] 赵义军[1,2] 王鹏翔[1] 王东[1] 秦裕琨[1,2] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001 [2]燃煤污染物减排国家工程实验室(哈尔滨工业大学),哈尔滨150001

出　　处：《哈尔滨工业大学学报》2017年第1期87-92,共6页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(51276045)

摘　　要：为实现高效低污染能源利用,提出煤基燃料氧水蒸气燃烧的近零排放发电技术.在一维沉降炉上研究伊敏脱灰煤、准东脱灰煤在不同氧浓度、水蒸气浓度下的着火温度,并利用快速升温水蒸气高压热重分析仪研究压力对着火温度的影响.结果表明:氧浓度对脱灰煤着火温度影响较大,随着氧体积浓度的增加,着火温度逐渐降低;随着水蒸气体积浓度的增加,脱灰煤着火温度逐渐升高,水蒸气体积分数从10%~50%每增加10%,着火温度升高约30℃.当压力小于1.0 MPa时,随着压力的增加,准东脱灰煤着火温度降低;当压力在1.0~2.0 MPa增大时,着火温度基本不变;在压力大于2.0 MPa时,着火温度逐渐升高.For energy conversion with high efficiency and low carbon emission,Oxy-Coal Combustion Steam System for power generation with near-zero emissions was proposed. The Ignition Temperature of Yimin demineralized coal and Zhundong demineralized coal were studied in a one-dimensional drop tube furnace at different oxygen concentration and steam concentration. The impact of pressure on the ignition temperature was investigated by High Pressure Steam TGA. The results show that the oxygen volume concentration is very important for the ignition temperature of demineralized coal. With the increasing of oxygen concentration,the ignition temperature is gradually reduced. With the increasing of the concentration of steam,the ignition temperature is gradually raised. When the steam volume concentration,range from 10% to 50%,increases 10%,the ignition temperature increases about30 ℃. When the pressure is less than 1. 0 MPa,with the increasing of pressure,the ignition temperature of Zhundong demineralized coal decreases,when the pressure is in the range of 1.0-2.0 MPa,then no obvious change for the ignition temperature,but when the pressure is greater than 2.0 MPa,the ignition temperature increases.

关 键 词：脱灰煤 氧燃烧 水蒸气 着火温度 热重分析 

分 类 号：TK16[动力工程及工程热物理—热能工程]