What is used for recovering the waste heat from low-temperature flue gas in boilers?

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This post was last edited by B0SS on 2017-11-14 at 20:55. In my experience, fluoroplastic heat exchangers are generally chosen for the recovery of waste heat from low-temperature flue gases in boilers. Why? Low-temperature flue gas waste heat recovery generally refers to flue gas with a temperature below 200°C. The waste heat from flue gas at temperatures below 200°C also holds great potential for recovery. The design is as follows: The main challenge is the corrosion problem caused by the acidic dew point of the flue gas at around 130°C. Materials used to overcome this issue include imported tetrafluoroethylene, polytetrafluoroethylene, and other fluoroplastics. The main advantage of such equipment for recovering waste heat from low-temperature flue gas is that it eliminates the corrosion problems associated with traditional metal heat exchangers; moreover, it can recover flue gas at a wide temperature range, from 180°C to 75°C. Main equipment: fluoroplastic flue gas waste heat recovery heat exchangers, flue gas heat exchangers, PTFE heat exchangers, and so on.