The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2006
Filed:
Aug. 12, 2002
Francis R. Alix, Rye, NH (US);
Joanna L. Duncan, Sanford, ME (US);
Christopher R. Mclarnon, Exeter, NH (US);
Francis R. Alix, Rye, NH (US);
Joanna L. Duncan, Sanford, ME (US);
Christopher R. McLarnon, Exeter, NH (US);
Powerspan Corp., Portsmouth, NH (US);
Abstract
A process and apparatus for removing SO, NO, and NOfrom a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO, scrubbing the SO, NO, and NOwith an ammonia, ammonium hydroxide, alkali hydroxide or carbonate scrubbing solution, regenerating the scrubbing solution with limestone, and removing any particulate matter and aerosols generated by the scrubbing step in a wet electrostatic precipitator. The process can also remove Hg by oxidizing it to oxidized Hg and removing it in the wet electrostatic precipitator. The scrubbing solution is preferably regenerated with limestone or magnesium, and results in a Group II sulfite or sulfate that can be recovered and sold, or landfilled.