Method for using fast fluidized bed dry bottom coal gasification
- Fords, NJ
- Lawrenceville, NJ
Carbonaceous solid material such as coal is gasified in a fast fluidized bed gasification system utilizing dual fluidized beds of hot char. The coal in particulate form is introduced along with oxygen-containing gas and steam into the fast fluidized bed gasification zone of a gasifier assembly wherein the upward superficial gas velocity exceeds about 5.0 ft/sec and temperature is 1500.degree.-1850.degree. F. The resulting effluent gas and substantial char are passed through a primary cyclone separator, from which char solids are returned to the fluidized bed. Gas from the primary cyclone separator is passed to a secondary cyclone separator, from which remaining fine char solids are returned through an injection nozzle together with additional steam and oxygen-containing gas to an oxidation zone located at the bottom of the gasifier, wherein the upward gas velocity ranges from about 3-15 ft/sec and is maintained at 1600.degree.-200.degree. F. temperature. This gasification arrangement provides for increased utilization of the secondary char material to produce higher overall carbon conversion and product yields in the process.
- Research Organization:
- HYDROCARBON RESEARCH INC
- DOE Contract Number:
- AC21-80MC14880
- Assignee:
- Hydrocarbon Research, Inc. (Lawrenceville, NJ)
- Patent Number(s):
- US 4400181
- OSTI ID:
- 864676
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
fast
fluidized
bed
dry
bottom
coal
gasification
carbonaceous
solid
material
gasified
utilizing
dual
beds
hot
char
particulate
form
introduced
oxygen-containing
gas
steam
zone
gasifier
assembly
upward
superficial
velocity
exceeds
temperature
1500
degree
-1850
resulting
effluent
substantial
passed
primary
cyclone
separator
solids
returned
secondary
remaining
fine
injection
nozzle
additional
oxidation
located
ranges
3-15
maintained
1600
-200
arrangement
provides
increased
utilization
produce
overall
carbon
conversion
product
yields
process
product yields
carbonaceous solid
cyclone separator
gasification zone
bed gasification
fluidized beds
arrangement provides
oxygen-containing gas
fluidized bed
solid material
coal gasification
particulate form
containing gas
coal gas
effluent gas
gas velocity
zone located
injection nozzle
fast fluidized
hot char
gasification arrangement
secondary char
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