关键词: 褐煤, 热解, 工业应用, 能量优化, 生产, 多元化, 资源化

Abstract: Lignite in eastern area of Inner Mongolia accounts for 83% of China's lignite reserves and is also the main energy source in this area. Low temperature pyrolysis of coal has the advantages of mild process conditions, extensive product usage and high profitability, which is the main method used for lignite processing. While, lignite usually has low lump coal ratio and high moisture content, and it also fragments obviously during thermal processing. With the current environmental protection policy becoming more and more serious, leading to low benefit, unqualified pollution discharge and discontinuous operation of lignite pyrolysis plants. This article introduces lignite pyrolysis technologies that have come into industrial application in eastern area of Inner Mongolia as follows: low-rank coal conversion technology(LCC), localizing continuous pyrolysis technology(LCP), belt-furnace lignite upgrade technology, GF-1 lignite upgrade technology, SJ low-temperature drying furnace technology and gas-coal cross-flow pyrolysis technology. Then, the operation state, advantages and drawbacks are also presented. By comparing the raw material requirements, heat transfer modes, coke quenching methods, heat utilization efficiency and product properties of these technologies, we propose the future development direction as raw material optimization, heat optimization, product diversification and waste reclamation, to achieve the industrial application of lignite pyrolysis in eastern area of Inner Mongolia, China.

Key words: lignite, pyrolysis, industrial application, heat optimization, production, product diversification, waste reclamation.