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. 08, 2001
Filed:
Aug. 13, 1999
Yasuo Katsuki, Sapporo, JP;
Takashi Ohnishi, Yufutsu-gun, JP;
Shozo Kaneko, Tokyo, JP;
Akira Hashimoto, Nagasaki, JP;
Yuichi Fujioka, Nagasaki, JP;
Kikuo Tokunaga, Nagasaki, JP;
Toshihiko Setoguchi, Nagasaki, JP;
Other;
Abstract
A dust collecting apparatus and method for dedusting a Ca-containing gas using a ceramics filter is provided, in which a filter differential pressure elevation rate is suppressed. A desulferizing agent,and a mineral,containing MgO are supplied via a hopper,a valve,and a feeder,into a pressurized fluidized-bed combustion furnace,together with coal,and air,. A combustion gas,is dedusted by a cyclone,to become a combustion gas,, the combustion gas,enters a filter container,having a ceramics filter,and is further dedusted. A combustion gas,which is dedusted is supplied into a gas turbine,to generate power, and combustion gas,heats a waste heat recovery boiler,which in turn drives a steam turbine,. The mineral,containing MgO is added in the combustion gas,which flows in the ceramics filter,. Thereby MgO is added to the combustion gas so that the filter differential pressure elevation rate can be suppressed. The more MgO that is supplied, the greater the effect becomes, and an operation stop due to the differential pressure elevation is eliminated.