陕煤集团低阶煤分质利用绿色低碳发展研究

Research on green and low-carbon development of low-rank coal grading utiliazation in Shaanxi Coal and Chemical Industry Group

低阶煤是煤炭清洁高效利用的一条重要路径。介绍了陕煤集团在低阶煤分质利用方面所取得的关键核心技术成果,重点阐述了陕煤集团新型直立炉热解技术、小粒煤热解工艺、粉煤热解工艺、煤焦油制芳烃及特种油品制备技术、半焦利用技术、热解煤气利用技术等关键技术及其应用进展:新型直立炉热解技术实现了粉煤、小粒煤、块煤的综合热解提质,热解效率大幅提升;自主研发的低阶粉煤气固热载体双循环快速热解技术(SM SP)使粉煤与热载体能充分混合接触并快速反应实现煤的热解;自主研发的煤焦油全馏分加氢多产中间馏分油技术(FTH),解决了低温煤焦油沥青难以加氢转化的世界性难题,为煤焦油全馏分加氢产业化打下了坚实的基础。最后,提出陕煤集团低阶煤分质清洁高效利用中长期发展目标。

Low-rank coal is an important path of coal clean and efficient utilization.This paper introduces the key technical achievements of SHCCIG in the grading utilization of low-rank coal,and focuses on the new vertical furnace pyrolysis technology,small grain coal pyrolysis technology,pulverized coal pyrolysis technology,coal tar aromatics and special oil preparation technology,semi-coke utilization technology,pyrolysis gas utilization technology and their application progresses of SHCCIG.The new vertical furnace technology realizes the comprehensive pyrolysis and quality improvement of pulverized coal,small grain coal and lump coal,and the pyrolysis efficiency has been greatly improved.The self-developed gas solid heat carrier double cycle rapid pyrolysis technology(SM-SP)for low-rank pulverized coal enables the pulverized coal and heat carrier to fully mix and contact and react quickly to realize coal pyrolysis;the self-developed technology of coal tar full-range hydrogenation to produce more middle distillate oil(FTH)has solved the worldwide problem that low-temperature coal tar pitch is difficult to be hydrogenated and converted,and laid a solid foundation for the industrialization of coal tar full-range hydrogenation.Finally,the medium and long-term development goals of clean and efficient utilization of low rank coal in SHCCIG are put forward.