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首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.4; 20060506-11; Barcelona(ES) >SYSTEM STUDY ON PARTIAL GASIFICATION COMBINED CYCLE WITH CO_2 RECOVERY
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SYSTEM STUDY ON PARTIAL GASIFICATION COMBINED CYCLE WITH CO_2 RECOVERY

机译：部分气化联合循环CO_2回收系统研究

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摘要

A partial gasification combined cycle with CO_2 recovery is proposed in this paper. Partial gasification adopts cascade conversion of the composition of coal. Active composition of coal is simply gasified, while inactive composition, that is char, is burnt in a boiler. Oxy-fuel combustion of syngas produces only CO_2 and H_2O, so the CO_2 can be separated through cooling the working fluid. This decreases the amount of energy consumed to separate CO_2 compared with conventional methods. The novel system integrates the above two key technologies, by injecting steam from a steam turbine into the combustion chamber of a gas turbine, to combine the Rankine cycle with the Brayton cycle. The thermal efficiency of this system will be higher based on the cascade utilization of energy level. Compared to the conventional IGCC, the compressor of the gas turbine, HRSG and gasifier are substituted for a pump, reheater and partial gasifier, so the system is simplified obviously. Furthermore, the novel system is investigated by means of EUD (Energy-Utilization Diagram) methodology and provides a simple analysis of their economic and environmental performance. As a result, the thermal efficiency of this system may be expected to be 46%, with recovery of 50% of CO_2, which is 3-5% higher than that of an IGCC system. At the same time, the total investment cost of the new system is about 21.5% lower than that of an IGCC. The promising results obtained here with higher thermal efficiency, lower cost and less environmental impact provide an attractive option for clean coal utilization technology.
机译：提出了部分气化联合循环与CO_2回收的方法。部分气化采用煤组成的级联转化。煤炭的活性成分只是简单地气化，而惰性成分（即炭）则在锅炉中燃烧。合成气的含氧燃料燃烧仅产生CO_2和H_2O，因此可以通过冷却工作流体来分离CO_2。与传统方法相比，这减少了分离CO_2所消耗的能量。该新型系统通过将蒸汽轮机中的蒸汽注入燃气轮机的燃烧室中，将兰金循环与布雷顿循环相结合，从而整合了上述两项关键技术。基于能量水平的级联利用，该系统的热效率将更高。与传统的IGCC相比，燃气轮机的压缩机，HRSG和气化炉代替了泵，再热器和部分气化炉，因此系统得到了明显简化。此外，该新型系统通过EUD（能源利用图）方法进行了研究，并对其经济和环境绩效进行了简单分析。结果，该系统的热效率可望达到46％，回收的CO_2为50％，比IGCC系统的热效率高3-5％。同时，新系统的总投资成本比IGCC的投资成本低约21.5％。在此获得的具有较高热效率，较低成本和较小环境影响的有希望的结果为清洁煤利用技术提供了有吸引力的选择。

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