TED-AJ03-190 STUDY ON GASIFICATION CHARACTERISTICS FOR EXTRA HEAVY OIL : EFFECT OF OXYGEN CONCENTRATION OF GASIFYING AGENT ON GASIFICATION CHARACTERISRISTICS
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概要
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The oxygen blown type is adopted in the extra heavy oil IGCC (Integrated Gasification Combined Cycle) system operating or planning now. In the oxygen blown type IGCC, the net thermal efficiency lowers because the power consumption of an air separation unit (ASU) is large. The capacity of the ASU can be decreased according to decrease of the oxygen concentration of the gasifying agent by using the boost-up air from the gas turbine. So, the net thermal efficiency rises by this, too. On the other hand, the decrease of the oxygen concentration of the gasifying agent causes lower gasification performances such as the cold gas efficiency (CGE) and the carbon conversion efficiency (CCE). In order to examine the oxygen concentration when the net thermal efficiency is the maximum, it is necessary to clarify the influence of the oxygen concentration of the gasification performances. In this research, the influence of the oxygen concentration of the gasifying agent on the gasification performances in an actual IGCC plant was clarified from Orimulsion^<TM> (trademark of BITOR) gasification tests using "Research Gasifier for Liquid Fuel". The actual condition can be produced in this gasifier. In addition, the optimization of the net thermal efficiency of the oxygen blown type IGCC was examined. It was clarified that the CCE tends to decrease as the oxygen concentration of the gasifying agent lowers and the CCE can be arranged with the gas temperature in the gasifier without depending on the oxygen ratio and the oxygen concentration by the gasification tests (Figure A-1). From the experiment results, quantitatively forecasting the influence of the oxygen concentration on the gasification performances in an actual IGCC plant became possible by examining the heat and material balance in consideration of the heat absorption to the gasifier wall. To examine optimum operating condition and thermal efficiency in the actual IGCC plant (1800 t/d), the relationships between the oxygen ratio and the CGE, the CCE when the oxygen concentration of the gasifying agent changes were calculated (Figure A-2). [figure]
- 一般社団法人日本機械学会の論文
著者
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Hara Saburo
Energy & Mechanical Engineering Department Central Research Institute Of Electric Power Industry
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Hara Saburo
Department Of Chemistry And Materials Technology Faculty Of Engineering And Design
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Inumaru J
Energy & Mechanical Engineering Department Central Research Institute Of Electric Power Industry
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Inumaru Jun
Energy & Mechanical Engineering Department Yokosuka Research Laboratory Central Research Institu
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Ashizawa Masami
Energy & Mechanical Engineering Department Central Research Institute Of Electric Power Industry
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KIDOGUCHI Kazuhiro
Energy & Mechanical Engineering Department, Central Research Institute of Electric Power Industry (C
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Kidoguchi Kazuhiro
Energy & Mechanical Engineering Department Central Research Institute Of Electric Power Industry
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