为了进一步推进煤炭热解分级转化多联产技术工业化应用，实现煤炭清洁高效资源化利用，通过试验研究和理论分析相结合的方法，利用1 MW流化床热解分级转化工业示范装置对煤炭热解分级转化产物的释放及其组分分布特性进行研究，分析了温度、煤种特性对挥发产物煤气产率、焦油产率、煤气组分、煤气热值等的影响，并对煤炭热解-燃烧双流化床协同耦合运行调控特性进行研究，最后以获得的1 MW流化床热解分级转化过程的相关产物转化特性参数及运行特性参数为基础，进行了50 MW循环流化床煤热解燃烧多联产工艺装置设计开发。结果表明，该装置煤气主要成分CH₄与H₂含量分别高达41.97%、28.32%，设计煤种条件下焦油产量3.16 t/h，煤气产量35 262 Nm³/h，煤气热值达到26.7 MJ/Nm³,焦油提取率达到90%以上，实现了较高的煤气热值与焦油回收率，为煤炭热解分级转化多联产技术工业化应用提供借鉴。

To further promote the industrial application of coal pyrolysis classification conversion polygeneration technology and achieve the clean and efficient resource utilization of coal，the evolution behavior of volatile products and the components distribution of volatile products during coal pyrolysis in a 1 MW demonstration multi-generation facility were investigated.Through the combination of experimental research and theoretical analysis in this paper.The effects of pyrolysis temperature and coal type on the fuel gas yield,tar oil yield,components distribution and heat value of fuel gas were also revealed. The synergistic operation characteristics between pyrolysis reactor and combustion reactor were elucidated during these experimental tests. Based on the data collected from the 1 MW multi-generation system operation a 50 MW CFB multi-generation device which integrated the coal pyrolysis,gasification,combustion,synthesis and other processes into a whole unity was designed to provide theoretic guidance for commercial application of the coal multi-generation technology. The experimental results show that the concentration of main components of CH₄ and H₂ in fuel gas is 41.97% and 28.32% respectively. Under design conditions the yield of tar and fuel gas is 3.16 t/h and 35 262 Nm³/h. The fuel gas heat value is high to 26.7 MJ/Nm³. The high tar recovery rate is above 90%,which realizes high gas calorific value and tar recovery,and provides reference guidance for the industrial application of coal pyrolysis classification conversion polygeneration technology.

0 引言

1 试验

   1.1 1 MW循环流化床煤炭分级转化技术

   1.2 1 MW煤炭分级转化多联产试验

   1.3 1 MW煤炭分级转化多联产煤质分析

2 试验结果与讨论

   2.1 1 MW煤炭分级转化多联产挥发产物特性

   2.2 50 MW多联产装置设计

3 结论