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. 18, 2014
Filed:
Jul. 15, 2010
Yoshinori Koyama, Tokyo, JP;
Osamu Shinada, Tokyo, JP;
Yuichiro Kitagawa, Tokyo, JP;
Takashi Yamamoto, Tokyo, JP;
Yoshinori Koyama, Tokyo, JP;
Osamu Shinada, Tokyo, JP;
Yuichiro Kitagawa, Tokyo, JP;
Takashi Yamamoto, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
In a porous filter, dust that has been collected from a gas through a filter group installed in a vessel body onto filter surfaces is removed from the filter surfaces by backwashing in which the supply and stoppage of a high-pressure gas ejected toward porous filter elements are repeated by means of a valve operation. Backwash tanks having upstream backwash valves and downstream backwash valves are installed in backwash pipes through which the high-pressure gas is guided from high-pressure-gas supply equipment to backwash nozzles for ejecting the backwash high-pressure gas toward the filter group to form a backwash high-pressure-medium supply line. The outlet pressure of the high-pressure-gas supply equipment is set to '1/critical pressure ratio' or more times a filter inlet gas pressure so that the flow speed of the high-pressure gas ejected from the backwash nozzle is the speed of sound or higher.