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:
Nov. 11, 2008
Filed:
Nov. 10, 2005
Shuichi Kanno, Hitachi, JP;
Shin Tamata, Higashiibaraki-gun, JP;
Kazuyoshi Irie, Hitachi, JP;
Kenji Yamamoto, Hitachinaka, JP;
Masayuki Taniguchi, Hitachinaka, JP;
Osamu Ito, Hitachiohta, JP;
Hironobu Kobayashi, Hitachi, JP;
Shuichi Kanno, Hitachi, JP;
Shin Tamata, Higashiibaraki-gun, JP;
Kazuyoshi Irie, Hitachi, JP;
Kenji Yamamoto, Hitachinaka, JP;
Masayuki Taniguchi, Hitachinaka, JP;
Osamu Ito, Hitachiohta, JP;
Hironobu Kobayashi, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A catalytic exhaust gas decomposition spirals an exhaust gas containing therein a substance to be decomposed and a reactant gas, rectifies the spiral flow, and lets the substance to be decomposed react with the reactant gas after the spiral flow has been rectified. For rectifying the spiral flow of the exhaust gas and the reactant gas, a plate-like baffle wall has therein a through hole at a portion near its center. The spiral flow is allowed to pass through the through hole so as to be centralized temporarily. The spiral flow then passes through an enlarged section of a flow path downstream of the through hole before being introduced into the catalyst bed. The method helps minimize variations in gas velocity of the exhaust gas flowing into the catalyst bed, thereby allowing a desired decomposition rate to be obtained substantially consistently.