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回收余热的热电联产IGCC电站研究

DOI: 10.13334/j.0258-8013.pcsee.2014.S.014, PP. 100-104

Keywords: 整体煤气化联合循环(IGCC),集中供热,余热回收,吸收式换热

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Abstract:

整体煤气化联合循环(integratedgasificationcombinedcycle,IGCC)作为洁净煤发电技术,发展为供热机组后,可实现更为清洁的煤基热电联产技术。另一方面,IGCC目前投资较高,若能实现与集中供热结合,供热收益可大幅度改善IGCC的经济性,而以热定电的形式保证了IGCC的年发电小时数,为IGCC的商业化推广提供了一条有力的途径。进行汽轮机乏汽余热回收与烟气余热回收后,IGCC的总体能源利用效率会进一步提高,经济性也将大幅改善。该文研究结果表明:400MW级的IGCC热电联产系统的热电比为47.2%,总体能源利用效率为57.6%;进行余热回收后,热电比为55.6%,总体能源利用效率为60.8%;在热力站进行吸收式换热改造后,热电比为62.0%,总体能源利用效率为63.4%。

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