When is the most appropriate moment for the heating furnace to switch from natural ventilation to forced ventilation?

2018-07-19View Original

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When is the most appropriate moment for the heating furnace to switch from natural ventilation to forced ventilation?

Reply #22018-07-20

If the blower fan is variable-frequency, it is recommended not to use natural ventilation during ignition, as switching from natural ventilation to forced ventilation will definitely cause fluctuations. Natural ventilation is replaced by forced ventilation generally when the flue gas temperature reaches 150 to 200 degrees Celsius; this varies depending on the type of air preheater. When I was at Sinopec Chemical*, they used forced ventilation for the processing processes.

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