成果報告書詳細
管理番号20160000000126
タイトル*平成27年度中間年報 ゼロエミッション石炭火力技術開発プロジェクト CCS対応高効率システム開発 CO2回収型クローズドIGCC技術開発
公開日2016/7/15
報告書年度2015 - 2015
委託先名一般財団法人電力中央研究所 三菱重工業株式会社 三菱日立パワーシステムズ株式会社
プロジェクト番号P10016
部署名環境部
和文要約
英文要約There are many projects applying CO2 capture technology to coal-fired power station, but it is concerned that capturing CO2 will deteriorate thermal efficiency and increase cost of electricity, because conventional CO2 capture system requires huge energy. This project is to establish fundamental technologies on the high-efficiency oxy-fuel IGCC. This system is composed of O2/CO2 blown gasifier and semi-closed cycle gas turbine, and is expected to keep high efficiency more than 42% at HHV even after capturing CO2. The status of this project in 2015 is as follows. Design of CO2 & O2 supply unit for 50TPD gasifier was done, and procurement and installation work has started. New incinerator was installed to 50TPD gasifier, to cope with temporary fluctuation of syngas flow rate during operating condition adjustment. CRIEPI proceeded basic design of test facilities both for 50TPD & 3TPD gasifier for confirmation of the system configuration and basic concept of hot-gas desulfurization process. Initial performance of improved sorbent was evaluated that it satisfies requirement for durability to the carbon deposition at the severe condition during plant start-up. Accuracy improvement of CFD code for 3TPD gasifier has started with implementation of proposed primary pyrolysis model and skeletal elementary reaction model for estimating soot formation. To increase the reliability of the elementary reaction model, the contribution of other elementary reactions to soot formation was evaluated. Numerical simulation of commercial scale gasifier was executed on 2 newly evaluated coal brands. To expand availability of the code, data of char gasification reaction was obtained using PDTF on another Indonesian coal. To construct numerical simulation tool to evaluate stability of slag discharge, fundamental test for verification data and consideration on mesh for simulation were started. High temperature properties of molten slag were measured to construct numerical prediction model, necessary for numerical simulation tool stated above. NMR analysis method was studied to evaluate structure of molten slag. Fuel gas supply system was designed for combustion test stand for gas turbine combustor, and design of model combustor was started. Combustion test using single burner test stand was executed to evaluate effect of NH3 gas as impurities, and effect of fuel composition on NOx formation was obtained. Exhaust gas by-path line was installed to obtain a data necessary for designing exhaust gas recirculation system. To evaluate performance of high-efficiency oxy-fuel IGCC system, development of evaluation models of mass and heat balance both for gasifier and gas turbine was started. Technical trends survey related to impurities in product CO2 has started. Revision on cost evaluation tool has started by referring materials issued by Japanese national committee. Technical trends survey on cryogenic gas separation technologies was done to reduce in-house power of this system.
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