Title:
PROCESS FOR REMOVING SULFUR OXIDES FROM GASEOUS MIXTURES
Document Type and Number:
WIPO Patent Application WO2002062453
Kind Code:
A8
Abstract:
A flue gas mixture containing sulfur oxides is scrubbed in a countercurrent spray tower absorber (10) with a spray of ammonium sulfate liquor and the scrubbed gas stream containing ammonia aerosols, sulfur trioxide aerosols and ammonia slip is passed to a wet electrostatic precipitator (54) for the removal of the aerosols and slip. The ammonium sulfate liquor in the absorber system is passed into a separate reaction tank (26) where ammonia and air are injected. The ammonia and sulfur oxides react in the separate reaction tank (26) to form ammonium sulfite which is oxidized to the sulfate by air. The gases and vapors from the separate reaction tank (26) are separately scrubbed and the gases then returned to the absorber (10).
Inventors:
BORIO DONALD C (US)
MURASKIN DAVID J
RADER PHILLIP C
WALTERS MARK A
MURASKIN DAVID J
RADER PHILLIP C
WALTERS MARK A
Application Number:
PCT/US2001/044221
Publication Date:
November 14, 2002
Filing Date:
November 20, 2001
Export Citation:
Assignee:
ALSTOM SWITZERLAND LTD (CH)
BORIO DONALD C (US)
BORIO DONALD C (US)
International Classes:
B01D53/50; (IPC1-7): B01D53/50
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