Superheated fuel injection for combustion of liquid-solid slurries

Patent · Tue Jan 01 00:00:00 EST 1985

OSTI ID:865699

Robben, Franklin A ^[1]

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1. Berkeley, CA

A method and device for obtaining, upon injection, flash evaporation of a liquid in a slurry fuel to aid in ignition and combustion. The device is particularly beneficial for use of coal-water slurry fuels in internal combustion engines such as diesel engines and gas turbines, and in external combustion devices such as boilers and furnaces. The slurry fuel is heated under pressure to near critical temperature in an injector accumulator, where the pressure is sufficiently high to prevent boiling. After injection into a combustion chamber, the water temperature will be well above boiling point at a reduced pressure in the combustion chamber, and flash boiling will preferentially take place at solid-liquid surfaces, resulting in the shattering of water droplets and the subsequent separation of the water from coal particles. This prevents the agglomeration of the coal particles during the subsequent ignition and combustion process, and reduces the energy required to evaporate the water and to heat the coal particles to ignition temperature. The overall effect will be to accelerate the ignition and combustion rates, and to reduce the size of the ash particles formed from the coal.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4558664
• OSTI ID: 865699
• Country of Publication: United States
• Language: English

Related Subjects

superheated
fuel
injection
combustion
liquid-solid
slurries
method
device
obtaining
flash
evaporation
liquid
slurry
ignition
particularly
beneficial
coal-water
fuels
internal
engines
diesel
gas
turbines
external
devices
boilers
furnaces
heated
pressure
near
critical
temperature
injector
accumulator
sufficiently
prevent
boiling
chamber
water
reduced
preferentially
solid-liquid
surfaces
resulting
shattering
droplets
subsequent
separation
coal
particles
prevents
agglomeration
process
reduces
energy
required
evaporate
heat
overall
effect
accelerate
rates
reduce
size
ash
formed
water temperature
subsequent separation
coal particle
ignition temperature
diesel engines
water slurry
coal-water slurry
combustion process
diesel engine
reduced pressure
critical temperature
internal combustion
combustion chamber
gas turbine
combustion engine
fuel injection
coal particles
slurry fuel
combustion engines
gas turbines
near critical
water droplets
particularly beneficial
slurry fuels
particles formed
energy required
flash evaporation
articles formed
combustion device
liquid surface
liquid surfaces
/123/110/431/