燃煤电厂水分与余热回收系统工艺方案及模糊评价  

Process schemes and fuzzy evaluation of moisture and waste heat recovery systems in coal-fired power plants

作　　者：马双忱[1] 武凯[1] 孙尧 刘畅[1] 邢浩若 MA Shuangchen;WU Kai;SUN Yao;LIU Chang;XING Haoruo(Department of Environmental Science and Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学环境科学与工程系,河北保定071003

出　　处：《华电技术》2020年第3期37-44,共8页HUADIAN TECHNOLOGY

基　　金：国家重点研发计划(2018YFB0604305)。

摘　　要：燃煤电厂烟气中的水分回收和余热利用存在巨大的节能降耗潜力,在选择水分与余热回收工艺方案时应兼具环保性与经济性。介绍了示范电厂原有工艺、改进工艺和优化工艺方案及其特性,并基于此建立了模糊层次分析评价模型,构建技术性能、经济性能、环保特性和系统适应性4类评价指标体系,结合指标数据均值化、判断矩阵构建和权重计算等过程得到3种方案的优劣排序,以期对燃煤电厂消除白色烟羽、回收烟气余热和协同治理废水零排放等关键技术设备的工艺方案评价提供参考。模型分析结果表明,膜法烟气水分回收+热膜耦合废水处理的优化工艺在经济、环境、技术、系统适应性等方面均优于原有工艺和改进工艺。Recovering the moisture and waste heat in the flue gas of coal-fired power plants is of significance energy-saving potential.Both environmental and economical performances should be considered while selecting the moisture and waste heat recovery process scheme.Based on the description and characteristics of the primary scheme,the advanced scheme and the optimization scheme of a administration power plant,a fuzzy analytic hierarchy process evaluation model was established to construct an evaluation index system within four types of indexes which were technical performance,economic performance,environmental performance and system adaptability indexes.By indexes equalization,judging the matrix construction and calculating the weight,a ranking for the three schemes was obtained which was expected to provide a reference for the technological scheme evaluation on key techniques such as white plume elimination,flue gas waste heat recovery,and wastewater zero discharge in coal-fired power plants.The analysis results of the model show that the membrane-based flue gas moisture recovery+thermal membrane coupled wastewater treatment is superior to the primary and advanced schemes in terms of economy,environmental protection,technology,and system adaptability.

关 键 词：燃煤电厂 水分回收 余热回收 工艺评估 模糊层次分析模型 权重 湿烟羽 废水零排放 

分 类 号：X701[环境科学与工程—环境工程]