Gasification of carbonaceous solids

Patent · 26 October 1976

OSTI ID:862678

Coates, Ralph L ^[1]

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1. Provo, UT

A process and apparatus for converting coal and other carbonaceous solids to an intermediate heating value fuel gas or to a synthesis gas. A stream of entrained pulverized coal is fed into the combustion stage of a three-stage gasifier along with a mixture of oxygen and steam at selected pressure and temperature. The products of the combustion stage pass into the second or quench stage where they are partially cooled and further reacted with water and/or steam. Ash is solidified into small particles and the formation of soot is suppressed by water/steam injections in the quench stage. The design of the quench stage prevents slag from solidifying on the walls. The products from the quench stage pass directly into a heat recovery stage where the products pass through the tube, or tubes, of a single-pass, shell and tube heat exchanger and steam is generated on the shell side and utilized for steam feed requirements of the process.

• Research Organization: Eyring Research Inst., Provo, Utah (USA)
• Other Award/Contract Number: E(49-18)-1548
• Assignee: United States of America as represented by United States Energy (Washington, D. C.)
• Patent Number(s): US 3988123
• Application Number: 05/605,369
• OSTI ID: 862678
• Country of Publication: United States
• Language: English

Related Subjects

/48/122/252/
apparatus
ash
carbonaceous
carbonaceous solid
carbonaceous solids
coal
combustion
combustion stage
converting
converting coal
cooled
design
directly
ducts pass
entrained
exchanger
fed
feed
formation
fuel
fuel gas
gas
gasification
gasifier
generated
heat
heat exchange
heat exchanger
heat recovery
heating
heating value
injections
intermediate
intermediate heat
mixture
oxygen
partially
partially cooled
particles
pass
pressure
prevents
process
products
pulverized
pulverized coal
quench
reacted
recovery
requirements
selected
selected pressure
shell
single-pass
slag
solidified
solidifying
solids
soot
stage
steam
steam injection
stream
suppressed
synthesis
synthesis gas
temperature
three-stage
tube
tube heat
tubes
utilized
value
value fuel
walls
water