Title:
石炭の改質方法
Document Type and Number:
Japanese Patent JP4365442
Kind Code:
B1
Abstract:
A method of upgrading coal which comprises: pulverizing low-grade coal; mixing the pulverized low-grade coal with an oil to form a slurry; heating the slurry to or above the boiling point of water to vaporize the water contained in the low-grade coal and dehydrate the coal; compressing a vapor mixture of the steam resulting from the slurry heating and that part of the oil which has vaporized simultaneously and thereby elevating the temperature and pressure of the vapor mixture; and supplying the vapor mixture increased in temperature and pressure by the compression and utilizing this vapor mixture as a high-temperature heat source to heat the slurry. In the method, the vapor mixture before being compressed is brought into contact with an oil in a liquid state. This method is a process in which low-grade coal containing water in a large proportion and hence having a low calorific value is dewatered in an oil to thereby upgrade the coal to a high-calorie fuel for thermal power generation, wherein the vapor mixture to be supplied to a compressor can be purified.
Inventors:
Seiichi Yamamoto
Takuo Shigehisa
Sugita Satoshi
Yu Mito
Kinoshita Shigeru
Takuo Shigehisa
Sugita Satoshi
Yu Mito
Kinoshita Shigeru
Application Number:
JP2008140914A
Publication Date:
November 18, 2009
Filing Date:
May 29, 2008
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C10L9/08
Domestic Patent References:
| JP2005206695A | ||||
| JP53112902A | ||||
| JP2007167764A |
Attorney, Agent or Firm:
Mitsuo Tanaka
Takuji Yamada
Atsushi Maeda
Takuji Yamada
Atsushi Maeda
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