Abstract: The coal pyrolysis as one of the core technology of high efficient and clean utilization of coal,has advantages of high-efficiency,low-water,low-investment,low-pollution,etc. The development of coal pyrolysis accords with national conditions of looking for the high efficient and clean utilization of coal. In this paper,the patents about coal pyrolysis both in China and abroad are retrieved and gathered statistics. To provide reference for the development of coal pyrolysis in our country,this paper analyses the general trend,areal distribution,main patentees and technical characteristics,and grasps the research direction and key fields. The paper indicates that the coal pyrolysis has stepped into the growth period and the patent layout is more complete. Pyrolysis is given priority to with fluidized bed technology abroad,while the domestic technology is rotary furnace pyrolyzer. The difficulty of product separation is the key technique barrier. The current solution is to decrease the products mixing in different stages by more refine process control,step-product collection and reducing tar residence time to relieve the pressure on separation. The overall system trends to develop coal pyrolysis-polygeneration.

Key words: coal pyrolysis, patent, analysis

摘要： 热解技术作为煤炭清洁高效利用的核心技术之一，具有能效高、耗水少、投资低、环境友好等优势，发展热解技术符合我国迫切寻求煤炭清洁利用技术的国情。本文对国内外煤热解技术相关专利进行了检索和统计，重点分析了煤热解技术发展的总体趋势、区域分布和重要专利人及其专利技术特点，以便于把握煤热解技术的研究方向和重点领域，为我国热解技术的进一步发展提供参考依据。分析表明煤热解技术处于技术成长期，专利布局日趋完善。国外热解以流化床技术为主，而国内技术多为回转炉式热解技术。热解技术的主要问题为产品分离困难，现阶段的解决思路是采用精细划分热解过程，分段收集产品，减少焦油停留时间等方法减少不同阶段产品的混合从而缓解分离的压力。热解整体系统的趋势为发展以热解为龙头的多联产技术。

关键词: 煤热解, 专利, 分析