Title:
COAL PROCESSING TO UPGRADE LOW RANK COAL HAVING LOW OIL CONTENT
Document Type and Number:
WIPO Patent Application WO/2012/166606
Kind Code:
A3
Abstract:
A method of treating untreated low calorific coal containing moisture and organic volatiles includes feeding untreated coal to a dryer, and drying the coal. The dried coal is subjected to a pyrolyzing step where oxygen-deficient gases are brought into contact with the coal, thereby lowering the volatile content of the coal and producing a stream of pyrolysis effluent gases. The pyrolysis effluent gases are subjected to a separation process to separate lean fuel gases from liquids and tars, wherein the separation process removes less than about 20 percent of the pyrolysis effluent gases as the liquids and tars, with the remainder being the lean fuel gases;. The lean fuel gases are returned to the dryer combustor, the pyrolyzer combustor, or the pyrolyzer.
Inventors:
COOLIDGE DENNIS W (US)
HORNE DEANE A (US)
SMITH RONN G (US)
HORNE DEANE A (US)
SMITH RONN G (US)
Application Number:
PCT/US2012/039598
Publication Date:
March 28, 2013
Filing Date:
May 25, 2012
Export Citation:
Assignee:
MR & E LTD (US)
COOLIDGE DENNIS W (US)
HORNE DEANE A (US)
SMITH RONN G (US)
COOLIDGE DENNIS W (US)
HORNE DEANE A (US)
SMITH RONN G (US)
International Classes:
C10J3/00; C10B57/10
Foreign References:
| US20110011719A1 | 2011-01-20 | |||
| US4263124A | 1981-04-21 | |||
| US4322222A | 1982-03-30 | |||
| US5087269A | 1992-02-11 |
Attorney, Agent or Firm:
GILLESPIE, Ted, C. (Sobanski & Todd LLC, One Maritime Plaza, US)
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