Oxidation of coal-water slurry feed to hydrogasifier

Patent · 01 January 1976

OSTI ID:862539

Lee, Bernard S ^[1]

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1. Lincolnwood, IL

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 The resulting solids are reacted in the hydrogasifier and the combined gases and vapors are withdrawn and subjected to purification and methanation to provide pipeline gas.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.

• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 3957460
• OSTI ID: 862539
• Country of Publication: United States
• Language: English

Related Subjects

/48/201/518/
amount
aqueous
aqueous coal
balance
coal
coal slurry
coal-water
coal-water slurry
combined
combined gas
completed
contact
controlled
direct
direct contact
effluent
effluent gas
evaporated
feed
gas
gases
hot
hydrogasifier
injected
injection
introduced
methanation
methane-containing
oxidation
oxygen
partial
partial oxidation
pipeline
preheated
pressure
pressure oxygen
proper
provide
purification
reacted
resulting
resulting solid
resulting solids
section
slurry
slurry feed
solids
subjected
thermal
thermal balance
top
top section
vaporization
vapors
water
water slurry
whereby
withdrawn