1000MW超超临界机组烟气余热梯级利用设计思想  

Flue Gas Waste Heat Echelon Utilization Design for 1000 MW Ultra-supercritical Units

作　　者：包伟伟[1] 张伟 刘彦宝 张少康[1] 张宇[1] 

机构地区：[1]哈尔滨汽轮机厂有限责任公司,黑龙江哈尔滨150046 [2]神华国华永州发电有限责任公司,湖南永州425000

出　　处：《东方汽轮机》2016年第4期8-11,29,共5页Dongfang Turbine

摘　　要：文章针对1 000 MW超超临界机组锅炉尾部烟气余热高效利用的问题,提出了梯级利用的设计思想,并基于热力系统的变工况分析计算方法,对该思想的设计特点以及经济性收益作了详细的论述及分析。结果表明:采用梯级利用设计思想,在第4、5级回热抽汽上设置蒸汽暖风器,在0号高压加热器上并联高位低温省煤器,可使机组热耗降低约26 kJ/k W·h,经济性效果明显。As tor the problem of boiler flue gas waste heat utilization of 1000 MW ultra-supercritical unit, the flue gas waste heat echelon utilization technology which can improve the economy of the unit is presented. Based on the analysis and calculation method of thermal dynamic system, detailed discussion and analysis to the design feature and economy benefit of the echelon utilization technology are conducted. The result shows that the unit heat rate will be reduced by 26 kJ/kW·h after using the technology with low temperature economizer on No.0 high pressure heater and steam air heater on No.4 and No.5 regenerative extraction.

关 键 词：汽轮机 超超临界 余热利用 蒸汽暖风器 低温省煤器 热经济性 

分 类 号：TK219[动力工程及工程热物理—动力机械及工程]