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:
Mar. 01, 2011
Filed:
Nov. 30, 2006
Soken Takase, Nagasaki, JP;
Yoshinori Koyama, Nagasaki, JP;
Osamu Shinada, Nagasaki, JP;
Yuichiro Kitagawa, Nagasaki, JP;
Ryouji Takahira, Nagasaki, JP;
Kazunari Imagama, Nagasaki, JP;
Soken Takase, Nagasaki, JP;
Yoshinori Koyama, Nagasaki, JP;
Osamu Shinada, Nagasaki, JP;
Yuichiro Kitagawa, Nagasaki, JP;
Ryouji Takahira, Nagasaki, JP;
Kazunari Imagama, Nagasaki, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A filter regeneration apparatus of a coal gasification system having a filter for capturing char (unburned matter) present in exhaust gas at an exhaust gas passage communicating with exhaust gas source including a coal gasification furnace, fills the filter container with inactive gas having oxygen concentration of less than 5 vol. % and heat the filter to a target temperature of 400 to 450° C. and feed ashing gas having oxygen concentration of 5 to 15 vol. %, thereby ashing char in the filter. This method and apparatus achieve ashing of char in a safe manner and shortens the time of regenerating the filter by controlling the oxygen concentration in the ashing gas and the filter temperature constantly to reach preset target values.