分段式低温省煤器在锅炉排烟余热回收中的应用  

Application of Segmented Low-temperature Economizer in the Flue Gas Heat Recovery System of a Boiler

作　　者：王志军[1] 熊源泉[1] 苏银海[1] 宋杰[1] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096

出　　处：《发电设备》2016年第5期294-298,307,共6页Power Equipment

基　　金：国家自然科学基金(51376047)

摘　　要：针对常规一段式低温省煤器排挤的抽汽品质受到排烟温度、排烟温降值及锅炉凝结水温度限制的问题,提出应用分段式低温省煤器烟气余热回收系统,实现分段回收烟气余热以提高低温省煤器排挤的抽汽品质。并通过对常规低温省煤器和分段式低温省煤器的计算分析,得出结论:分段式低温省煤器热力性能优于常规低温省煤器;通过系统参数的优化,分段式低温省煤器经济性能可高于常规低温省煤器。To solve the problem that the quality of the extraction steam excluded by conventional one- part low-temperature economizer is limited by restrictions of the flue gas temperature, condensate water temperature and eventually exhaust temperature drop, a segmented low-temperature economizer flue gas waste heat recovery system was put forward to improve the quality of the extraction steam. Calculation and analysis results for both the conventional and segmented low-temperature economizer show that the thermal performance of segmented low-temperature economizer is superior to the conventional one, and the economic effect of segmented low-temperature economizer may be higher than the conventional one, through optimization of relevant system parameters.

关 键 词：低温省煤器 分段式 冷凝水 抽汽 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]