Title: Oxidation of coal-water slurry feed to hydrogasifier

Abstract: An aqueous coal slurry is preheated, subjected to partial oxidation and vaporization by injection of high pressure oxygen and is introduced into a top section of a hydrogasifier in direct contact with hot methane-containing effluent gases where vaporization of the slurry is completed. The resulting solids are reacted in the hydrogasifier and the combined gases and vapors are withdrawn and subjected to purification and methanation to provide pipeline gas. The amount of oxygen injected into the slurry is controlled to provide the proper thermal balance whereby all of the water in the slurry can be evaporated in contact with the hot effluent gases from the hydrogasifier.

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Inventors: Lee, Bernard S. (Lincolnwood, IL, US)

Application Number: 611780
Filing Date: 1975-09-09
Publication_date: 1976-05-18
Assignee: The United States of America as represented by the United States Energy (Washington, DC)
Primary Class(es): 48/197R 48/202, 48/206, 48/210, 48/DIG7, 201/9, 201/31, 518/703, 518/705
Other Classes:
US Patent Ref:

2838388	Jun, 1958	Carkeek et al.	48/DIG.
2864677	Dec, 1958	Eastman et al.	48/197.
2942959	Jun, 1960	Rees et al.	48/197.

Other Refs:
Primary Examiner: Bashore, S. Leon
Assistant Examiner: Yeung, George C.
Attorney: Carlson; Dean E., Churm; Arthur A.