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:
Oct. 17, 2000
Filed:
Oct. 24, 1997
Masao Tsurui, Yokohama, JP;
Masanori Asakura, Yokohama, JP;
Takashi Goto, Yokohama, JP;
Tsutomu Katagiri, Yokohama, JP;
Akio Furuta, Handa, JP;
Takao Takinami, Handa, JP;
Yoshinori Suto, Handa, JP;
Kazuhiro Shibata, Sayama, JP;
Jin Ogawa, Tokyo, JP;
Masayuki Yui, Iwaki, JP;
Shinji Takano, Yokohama, JP;
JGC Corporation, Tokyo, JP;
Abstract
In a coal-water slurry producing system, low grade coal is wet-ground to not greater than 3 mm in particle size to produce a ground coal slurry. An upgrading treatment is applied to the ground coal slurry under a pressurized hydrothermal atmosphere not less than 300.degree. C. to produce an upgraded coal slurry. The upgraded coal slurry is subjected to a dehydration treatment to produce an upgraded coal cake and a filtrate. A final coal-water slurry is produced from the upgraded coal cake. The filtrate is recycled for producing the ground coal slurry. A slurry transfer mechanism is provided in the coal-water slurry producing system for ensuring a stable transfer of the upgraded coal slurry from a high-pressure slurry vessel to a low-pressure slurry vessel.