High-density circulating fluidized bed gasifier for advanced IGCC/IGFC-Advantages and challenges  

作　　者：Guoqing Guan Chihiro Fushimi Atsushi Tsutsumi Masanori Ishizuka Satoru Matsuda Hiroyuki Hatano Yoshizo Suzuki 

机构地区：[1]Collaborative Research Center for Energy Engineering, Deportment of Mechanical and Biolhnctional Systems, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguoro-ku, Tokyo 153-8505,Japan [2]Clean Gas Group, National Institute of Advanced Industrial Science and Technology, 16- 1, Onogawa, Tsukuba, Iboraki, 305-8569,Japan

出　　处：《Particuology》2010年第6期602-606,共5页颗粒学报（英文版）

基　　金：supported by the New Energy and Industrial Technology Development Organization(NEDO)

摘　　要：Coal-fired Integrated Gasification Combined Cycle （IGCC） and Integrated coal Gasification Fuel-cell Com- bined cycle （IGFC） are being developed as high-efficiency electric power generation technology. However, the highest theoretical gross thermal efficiency of the conventional IGCC]IGFC is still below 52~. In order to obtain higher power generation efficiency, an advanced IGCC （A-IGCC） or advanced IGFC （A-IGFC） sys- tem making use of the exergy recuperation concept by recycling waste heat from gas turbine or fuel cells for steam gasification of coal and biomass was proposed in our laboratory, Corresponding to this system, a novel high-density triple-bed combined circulating fluidized bed （TBCFB） gasifier, composed of a downer pyrolyzer, a bubbling fluidized bed char gasifier, and a riser combustor, was proposed to replace traditional gasifiers such as the entrained flow bed gasifier. The new system is expected to more effectively utilize the waste heat from gas turbines or fuel cells and the heat produced by the combustion of the unreacted char in the riser combustor for pyrolysis and gasification of coal and biomass. In this short review, the advantages and future challenges in the development of high-density TBCFB gasifier are presented and discussed.Coal-fired Integrated Gasification Combined Cycle （IGCC） and Integrated coal Gasification Fuel-cell Com- bined cycle （IGFC） are being developed as high-efficiency electric power generation technology. However, the highest theoretical gross thermal efficiency of the conventional IGCC]IGFC is still below 52~. In order to obtain higher power generation efficiency, an advanced IGCC （A-IGCC） or advanced IGFC （A-IGFC） sys- tem making use of the exergy recuperation concept by recycling waste heat from gas turbine or fuel cells for steam gasification of coal and biomass was proposed in our laboratory, Corresponding to this system, a novel high-density triple-bed combined circulating fluidized bed （TBCFB） gasifier, composed of a downer pyrolyzer, a bubbling fluidized bed char gasifier, and a riser combustor, was proposed to replace traditional gasifiers such as the entrained flow bed gasifier. The new system is expected to more effectively utilize the waste heat from gas turbines or fuel cells and the heat produced by the combustion of the unreacted char in the riser combustor for pyrolysis and gasification of coal and biomass. In this short review, the advantages and future challenges in the development of high-density TBCFB gasifier are presented and discussed.

关 键 词：IGCC/IGFC High-density circulating fluidized bed Gasifier Riser Downer Bubbling fluidized bed Exergy recuperation Biomass Coal 

分 类 号：TM611.3[电气工程—电力系统及自动化] TQ545[化学工程—煤化学工程]