Influence of Flue Study on the Characteristics of Heat Exchange of Waste Heat Recovery of Natural Gas Boiler by QIN Bai, ZHANG Qiang, ZHANG Bo, WU Chao

“…In order to study the temperature distribution of the turbo-generator stator ,a air-cooling Aiming at the problem that there is a huge loss of latent heat in water vapor caused by the high exhaust gas temperature in the natural gas boiler, relatively large exhaust heat loss and water vapor in a superheated state going into the atmosphere, based on relevant theories of engineering thermodynamics and heat transfer calculation, a finned tube exchanger is added to the natural gas boiler system to deeply recycle the sensible heat of flue gas in the gas extraction process and the latent heat released during the steam condensation process in order to recover the waste heat.Based on this, the paper carries out a study on the influence of inlet velocity on the heat transfer performance of finned tube heat exchanger and through numerical simulation draws the conclusion that within a certain scope of inlet velocity, the heat transfer efficiency is better along with higher speed so as to select reasonable flue gas inlet velocity to achieve the goal of reducing the exhaust gas temperature, recovering deeply the flue gas heat.…”
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