太阳能-燃煤电厂污染物减排热力系统性能分析  

THERMODYNAMICS ANALYSIS OF POLLUTANT EMISSION REDUCTION FOR SOLAR-COAL POWER PLANT

作　　者：韩中合[1] 王继选[1] 刘小贞[2] 白睿[1] 白亚开 王江江[1] 

机构地区：[1]华北电力大学,电站设备状态监测与控制教育部重点实验室,保定071003 [2]邯郸职业技术学院电子信息工程系,邯郸056001

出　　处：《太阳能学报》2015年第10期2369-2376,共8页Acta Energiae Solaris Sinica

基　　金：河北省教育厅项目(QN2015108);中央高校基本科研业务专项资金(13XS38);北京市支持中央在京高校共建项目(20121007901);国家自然科学基金(51076044)

摘　　要：以N600-24.2/566/566机组为例,针对燃烧后脱碳及脱硝系统能耗高的问题,利用太阳能热作为二氧化碳吸收剂解吸热源,机组抽汽作为脱硝系统液氨蒸发器热源,提出几种不同的集成方案。对不同集成方案进行热力性能建模,得出可行性集成方案。构建可行性集成系统的平衡模型,应用该模型进行集成系统中不同组件的分析。结果表明:集成系统的全厂热效率较原系统提高1%。集成系统中,各组件的损率和损失系数比原系统有所减小;过热器的损失最大,太阳能集热场的损失次之;中压缸各级组效率较高,调节级级组和低压缸末级的效率较低;加热器的效率随抽汽压力降低而降低,高压加热器的效率均高于低压加热器。节能潜力主要集中在过热器、太阳能集热场、调节级和低压缸末级。In order to solve the problem of high energy consumption of carbon capture and denitration, solar energy was used as heat source for amine-based chemical absorption of carbon capture system and steam extraction of N600-24.2/ 566/566 unit was used as the heat source for ammonia evaporator of the selective catalytic reduction system, the different integration systems for the N600-24.2/566/566 unit were presented. The feasible integration system was selected based on the calculated results of thermal-economy of the integration systems. The mathematical model for exergy balance of the feasible integration system was presented. The exergy analysis of the integration system was conducted by this model. The results indicate that the thermal efficiency of the integration system is improved by 1%. The exergy loss ratio and exergy loss coefficient of each component are lower than that of the original system. The exergy loss of superheater was the largest and that of the parabolic trough collector field took the second place. The exergy efficiency of the components of intermediate pressure turbine was relatively high. The exergy efficiencies of governing stage of high pressure turbine and last stage of low pressure turbine were relatively low. The exergy efficiency of heaters was decreased with the reduction of steam extraction pressure. The superheater, parabolic trough collector field, governing stage of high pressure turbine and last stage of low pressure turbine have huge potential of energy saving.

关 键 词：太阳能 碳捕集 集成系统 炯分析模型 

分 类 号：TM611[电气工程—电力系统及自动化]