华电技术 ›› 2014, Vol. 36 ›› Issue (12): 66-69.

• 节能与环保 • 上一篇    下一篇

锅炉深度利用烟气余热变能级系统的原理与设计

  

  1. (1.国网能源伊犁煤电有限公司,新疆伊宁835000; 2.华电国际山东分公司,济南〓250101; 3.山东大学能源与动力工程学院,济南〓250061; 4.山东泓奥电力科技有限公司,济南〓250101)
  • 出版日期:2014-12-25 发布日期:2015-02-04

Theory and design of variable energy level system for deep utilization of boiler flue gas waste heat

  1. (1.Ili CoalElectricity Corporation limited of State Grid Energy Development Company, Ili 835000, China; 2.Shandong Branch of Huadian Power International Corporation limited, Jinan 250101,China;3.Energy Sources and Power Engineering School of Shandong University, Jinan 250061, China; 4.Shandong Grand Oarsmam Power Technology Corporation limited, Jinan 250101, China)
  • Online:2014-12-25 Published:2015-02-04

摘要: 摘要:介绍了锅炉深度利用烟气余热变能级系统的原理、技术路线和节能量计算特点,分析了深度降低烟温的技术和经济性能,论述了该系统利用低品位烟气加热锅炉送风和高品位烟气加热汽轮机凝结水的概况,在获得更大排挤功的同时,可常年对空气预热器的冷端进行保护。该系统与常规低压省煤器相比,可降低供电煤耗0.5~0.6g/(kW•h),提高空气预热器冷端综合温度30~40℃,实现冬季锅炉送风加热零汽耗,适用于原排烟温度相对较低的烟气余热深度回收。

关键词: 关键词:烟气余热, 变能级利用, 排烟温度, 节能

Abstract: Abstract:The theory and the technology route of the variable energy level system for deep utilization of boiler flue gas waste heat were introduced. The features of the energysaving effect calculation of the system were described. The technical and economical performance of exhaust gas temperature deep reducing technology was analyzed. In the system, the hightemperature flue gas is used to heat the condensate water of the turbine, and the lowtemperature flue gas is used to heat the forced air of the boiler. By the method, more squeezedout power can be obtained, and the coldend protection of the air preheater can realized all year around. Comparing the system with conventional lowpressure economizer, the net coal consumption rate is reduced by 0.5~0.6g/(kW•h), the coldend comprehensive temperature of the air preheater is increased by 30~40℃, the steam consumption for boiler forced air heating in winter is reduced to zero. The system is applicable to the boilers with relative lower exhaust gas temperature to recover the waste heat deeply.

Key words: Keywords:flue gas waste heat, variable energy levelmode utilization, exhaust gas temperature, energy conservation