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:
Jun. 24, 2003
Filed:
May. 08, 1998
Applicant:
Inventors:
Masaki Iijima, Tokyo, JP;
Tetsuya Imai, Tokyo, JP;
Assignee:
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 5/346 ; C01B 2/102 ;
U.S. Cl.
CPC ...
B01D 5/346 ; C01B 2/102 ;
Abstract
A process is provided for producing a nitrogen gas, useful in the petroleum industry, by combusting fuel with air in a “once through”-type boiler and injecting a supplemental fuel, such as natural gas, into the exhaust gas at a location just before a combustion catalyst that promotes the reaction between this supplemental fuel and the residual oxygen present in the exhaust gas. This oxygen-diminished, exhaust gas is then passed through a heat exchanger, where it transfers its heat to the air entering the boiler.