烟气冷却器的节能效果评价  

The Energy-saving Effect Evaluation of Fuel Gas Cooler

作　　者：段立强[1] 李冉[1] 杨勇平[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《节能技术》2012年第5期387-391,共5页Energy Conservation Technology

基　　金：国家自然科学基金资助项目(51006033);国家重点基础研究发展计划项目(973计划)(2009CB219801);中央高校基本科研业务费专项资金(10ZG03)

摘　　要：通过烟气冷却器充分利用电站锅炉的排烟余热加热凝结水能够替代部分回热抽汽,减少了回热系统对低压缸的抽汽,使汽轮机做功量增加,机组煤耗降低。烟气冷却器按照不同的联结方式与回热系统的加热器集成后,随着机组负荷的降低,所带来的节煤效果的差别逐渐变大。并且,不同的集成方式对加热器内部附加单耗的影响差异较大。另外,腐蚀问题仍然是限制低温烟气余热深度利用的瓶颈。若能在材料上有所突破,就能得到更低的排烟温度,使机组的热经济性进一步提高。By taking full advantage of the waste heat from the flue gas of power plant to heat the condensate by the flue gas cooler can replace part of heat of feeding water heating,thus reducing the steam extraction of the low-pressure（LP） cylinder,which will increase the output power of LP turbine and decrease the unit energy consumption of system.With the reduction of the unit load,the differences of the energy saving effect brought about by the different integration ways of linking gas cooler and the regenerative heater system gradually increases.Meanwhile,the effects of different integration methods on the additional unit consumption of heaters are different.In addition,the corrosion problem is still the bottleneck that will limit the deep use of low-temperature flue gas heat.The breakthrough in material technology will make it possible to further lower the temperature of fuel gas,which will further improve the thermal performance of power plant.

关 键 词：烟气冷却器 余热利用 附加单耗 

分 类 号：TK11[动力工程及工程热物理—热能工程]