燃气电厂排烟温度及流速对烟气扩散的影响*
Influence of exhaust gas temperature and flow velocity on flue gas diffusion in gas-fired power plants
摘要：
针对燃气-蒸汽联合循环背压供热机组，介绍了烟气余热深度利用的新工艺流程。利用AERSCREEN模型进行理论计算，对排烟温度、烟气流速及环境温度对烟气扩散的影响进行了分析研究。结果表明，采用新工艺不会造成NOx落地浓度超标，且能够降低供热系统的能源消耗和污染物排放。
关键词：烟气余热,排烟温度,烟气流速,环境温度,NOx浓度
Abstract：
Presents a new process for the deep utilization of flue gas waste heat in a gas-steam combined cycle backpressure heating unit. Carries out the theoretical calculation using the AERSCREEN model, and analyses the influence of exhaust gas temperature, flue gas velocity and ambient temperature on flue gas diffusion. The results show that the new process can not cause the NOx ground-level concentration exceeding the standard, and can reduce the energy consumption and pollutant emission of the heating system.
Keywords:fluegaswasteheat,exhaustgastemperature,fluegasvelocity,ambienttemperature,NOxconcentration