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Which of these is NOT a reason to reheat flue gas after a wet scrubber?

  • A.To reduce the mass of pollutant emitted
  • B.To raise the gas above its acid dew point
  • C.To restore buoyant plume rise
  • D.To protect the stack lining from corrosion

Answer: A

Correct answer: To reduce the mass of pollutant emitted

Reheat does nothing whatever to the mass emitted - it only warms the gas. Its three genuine purposes are all listed: to lift the gas above its acid dew point, to protect the lining from the acid that would otherwise condense, and to restore the buoyancy the scrubber removed.

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