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Why saturated steam is used for drying purposes in chemical industries rather than using superheated steam ?

for example, in vacuum chamber drying saturated steam is used rather than using superheated or unsaturated steam.

2 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    Superheated steam requires a superheat boiler, ie a boiler with a superheater built in. Also, when the pressure of the steam is dropped as it is in a vacuum chamber, the temperature is the same and it becomes superheated at the lower pressure when it goes through the nozzle and is no longer saturated. Superheated steam is used for high speed turbines where the admission of wet particles would cause a dangerous out of balance condition. Also, keeping steam superheated requires more combustion fuel, special piping and heavier insulation.

    Source(s): PV=nrT
  • Irv S
    Lv 7
    1 decade ago

    Simple. - It's one whole hell of a lot safer to handle.

  • 1 decade ago

    gentler

    doesnt cook

    washes a bit

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