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. 26, 1987
Filed:
Aug. 21, 1985
Yoichi Nakamura, Kanagawa, JP;
Akio Yamamoto, Kudamatsu, JP;
Goro Kurita, Yamaguchi, JP;
Jinichi Tomuro, Katsuta, JP;
Toshio Kuge, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method and apparatus for upgrading low rank coal, wherein the sealing efficiency between the inside and the outside of a system and between the successive stages of apparatus is improved. Such improvement is provided between a drying apparatus for drying low rank coal into dried coal and a carbonizing apparatus for carbonizing the dried coal into carbonized coal and between the carbonizing apparatus and a cooling/adsorbing apparatus for cooling said carbonized coal and the cooled carbonized coal is caused to absorb therein a tar produced from the carbonization of the dried coal to thereby provide improved coal. In this method and apparatus inflow of an outside atmosphere from the outside into the inside of the system and mixing of gases between said successive stages of apparatus is restrained so that low rank coal is able to be favorably and consecutively upgraded regardless of operating pressures of the respective stages of apparatus.