关键词: 煤热解, 专利, 分析

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