基于增热型吸收式换热的燃气锅炉集中供热技术节能效益分析

发布时间：2018-03-16 00:09

  本文选题：烟气余热　切入点：直燃型溴化锂吸收式热泵　出处：《建筑科学》2017年10期 　论文类型：期刊论文

【摘要】：开发可再生能源-地热和回收锅炉烟气余热是提高既有供热系统供热能效的有效措施。本文研究的基于增热型吸收式换热的燃气锅炉供热系统在热源站设置直燃型吸收式热泵和防腐型间壁式烟-水换热器用于深度回收烟气余热,在热力站设置增热型吸收式换热机组用于开发利用地热。分析表明,当供热负荷为50 MW时,该供热系统可将排烟温度降至35℃,回收烟气余热约4.7万GJ/a,回收地热约4.6万GJ/a,降低NO_x排放量约1.5 t/a。与常规燃气锅炉集中供热系统相比,该供热系统可提高一次能源利用率约27.8%,降低天然气年消耗量约19.9%,供热成本降低7.7%,增量投资回收期少于6 a。该系统用能方式相对较为合理,其节能效益、经济效率和环保效益均优于常规燃气锅炉集中供热系统,宜适用于北方地热资源可资利用的区域。研究成果为既有锅炉供热系统升级改造或新建供热系统规划与设计提供参考。
[Abstract]:It is an effective measure to improve the heating efficiency of the existing heating system by developing the renewable energy-geothermal and recovering the waste heat from the flue gas of the boiler. In this paper, the gas boiler heating system based on the enhanced absorption heat transfer is designed for direct combustion at the heat source station. Type-type absorption heat pump and anti-corrosion wall-type smoke-water heat exchanger for deep recovery of flue gas waste heat, An enhanced absorption heat exchanger is set up at the thermal station for the development and utilization of geothermal. The analysis shows that when the heating load is 50 MW, the exhaust gas temperature of the heating system can be reduced to 35 鈩，

本文编号：1617442