摘要
为了探析水煤浆加压气化炉耐火材料的损毁原因,采用X射线荧光光谱分析(XRF)测试仪器研究了高铬耐火砖使用前后不同部位、不同工况下的氧化物组成及铬含量,结果表明:气化炉拱顶砖、筒体砖、下渣口砖侵蚀机理各不相同;高温条件下原料煤的熔渣与耐火砖表面进行反应、渗透,从而引起耐火砖的组分变化及强度改变,在气化炉内部残炭、灰渣颗粒的空间行为、壁面沉积、流场运动等共同作用下会导致耐火砖剥落;气化炉在运行过程中开停车、负荷波动等异常工况会加速耐火砖的侵蚀。
In order to investigate the damage causes of refractory materials in coal water slurry pressurized gasifier,X-ray fluorescence spectroscopy(XRF)was used to study the oxide composition and chromium content of high chromium refractory bricks in different parts and under different working conditions before and after use.The results showed that the erosion mechanism of gasifier crown brick,shell brick and bottom slag notch brick was different from each other.Under the condition of high temperature,the slag of raw coal reacted with and penetrated into the surface of refractory brick,thus causing the change of composition and strength of refractory brick.The spatial behavior of residual carbon and ash particles,wall deposition and flow field movement in gasifier would lead to the peeling of refractory brick.During the operation of gasifier,abnormal conditions such as startup/shutdown and load fluctuation would accelerate the erosion of refractory bricks.
作者
杨会军
许华杰
蔚永清
吴跃
Yang Huijun;Xu Huajie;Yu Yongqing;Wu Yue(Institute of Coal Chemical Industry Technology,China Energy Group Ningxia Coal Co.,Ltd.,Yinchuan Ningxia 750411,China)
出处
《煤化工》
CAS
2023年第6期73-76,80,共5页
Coal Chemical Industry
关键词
水煤浆气化炉
高铬耐火砖
拱顶砖
筒体砖
下渣口砖
侵蚀特性
coal water slurry gasifier
high chrome refractory brick
crown brick
shell brick
bottom slag notch brick
erosion feature
