Research progress characteristics analysis and comprehensive utilization of coal gasification slag
LIU Yanli, LI Qiang, CHEN Zhanfei, ZHAO Jiang, ZHAO Yu, SUN Lipeng
以煤气化技术为龙头的现代煤化工在气化过程中产生大量的煤气化渣。随着国家生态文明建设的快速推进,环保高质量发展的要求迫使煤气化渣的综合利用成为现代煤化工领域迫切需要解决的课题之一。然而,目前煤气化渣综合利用率低下,仍以露天填埋堆放为主,长期堆放对水体、大气造成较大污染。针对煤气化渣的研究主要包括制作气化渣营养基质或吸附材料、用作建筑材料、气化渣金属元素的回收利用,以及脱水脱碳资源化利用等方面,其研究路径存在利用率低、成本高、规模化效应差的不足,因此煤气化渣的综合利用仍然是社会各界高度关注的课题。鉴于此,采用资料查阅、野外调研与室内分析统计相结合的研究方法,在全面掌握煤气化渣的主要来源及危害、煤气化渣物理性质、化学性质及环境风险等基本特性的基础上,系统剖析了煤气化渣在建材领域、土壤改良领域、吸附催化材料等领域的研究与应用现状。同时,基于煤气化渣全产业链理念和资源化利用思路,结合野外调研实践,进一步提出煤气化渣处置无害化+消纳本地化相结合,低值规模化+高值精细化相结合,环境效应跟踪监测+综合利用装备系统研发相结合的综合利用思路和路径。期望为气化渣综合利用及煤化工清洁生产和循环发展提供参考。
The modern coal chemical industry, which takes coal gasification technology as the leading technology, produces a lot of coal gasification slag in the process of gasification. With the rapid development of national ecological civilization, the comprehensive utilization of coal gasification slag has become one of the urgent issues to be solved in the field of modern coal chemical industry. However, at present, the comprehensive utilization rate of coal gasification slag is low, and it is still mainly buried in open landfill, which causes great pollution to water and atmosphere for a long time. In scientific research on coal gasification residue mainly includes gasification residue nutrition substrate or adsorption material, and used as building materials, gasification slag metal recycling, and dehydration decarburization resource utilization and so on, its research way as the low efficiency, high cost, the lack of scale effect is poor, so the comprehensive utilization of coal gasification slag is still high attention from all walks of life. In view of this, using statistical information consulting, field investigation and indoor analysis research method of combining, in fully grasp the main source and harm of the coal gasification slag slag, coal gasification, physical properties, chemical properties and environmental risks, on the basis of the basic features, such as slag system analyzed the coal gasification in the field of building materials, soil improvement areas such as catalysis, adsorption material in the field of research and application status. Slag at the same time, based on coal gasification principle of whole industry chain and recycling use ways, in combination with field investigation and practice, further put forward coal gasification slag disposal harmless + given localization, the combination of high value and low scale fine combination of comprehensive utilization of environmental effect tracing monitoring + equipment system research and development with the combination of the comprehensive utilization way of thinking and path. It is expected to provide reference for the comprehensive utilization of gasification slag, clean production and cycle development of coal chemical industry.
coal gasification technology;coal gasification slag; gasification slag resource; clean production of coal chemical industry
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会