煤热解工艺中挥发分除尘技术的现状分析及建议

Status analysis and improvement measures of volatile dust removal technology in coal pyrolysis process

针对粉煤热解多联产工艺中热解挥发分除尘的技术难题,阐述了热解挥发分所含粉焦及煤灰颗粒的特性、热解工艺对除尘器的要求,对热解挥发分除尘技术的研究现状进行分析并提出建议,认为煤热解工艺中挥发分除尘技术应该从热解工艺本身出发,采用加氢(催化)热解方式,促进热解气中重质焦油组分裂解,使热解产物轻质化,从而降低煤热解挥发分的除尘难度。此外,可以采用多种除尘设备有机组合的方式并辅以分离前对细小粉尘进行预团聚等手段,强化除尘效果、提高煤热解工艺中挥发分的除尘效率。

To improve the volatile dust removal efficiency in the process of pulverized coal pyrolysis, investigate the characteristics of fine coke and coal ash in volatile and the requirements for dust collector.Expound the research status and development of dust removal technolo- gy in the process of coal pyrolysis. The results show that, the way of catalytic hydrogenation pyrolysis can promote cracking of heavy tar components ,which can reduce the dust removal difficulty markedly.The combination of different dust removal devices and agglomeration of fine particles before entering dust collector also can improve the dust removal efficiency.