Cross flow electrofilter and method
- Northbrook, IL
- Chicago, IL
- Westmont, IL
A filter for clarifying carbonaceous liquids containing finely divided solid particles of, for instance, unreacted coal, ash and other solids discharged from a coal liquefaction process is presented. The filter includes two passageways separated by a porous filter medium. In one preferred embodiment the filter medium is of tubular shape to form the first passageway and is enclosed within an outer housing to form the second passageway within the annulus. An electrode disposed in the first passageway, for instance along the tube axis, is connected to a source of high voltage for establishing an electric field between the electrode and the filter medium. Slurry feed flows through the first passageway tangentially to the surfaces of the filter medium and the electrode. Particles from the feed slurry are attracted to the electrode within the first passageway to prevent plugging of the porous filter medium while carbonaceous liquid filters into the second passageway for withdrawal. Concentrated slurry is discharged from the first passageway at an end opposite to the feed slurry inlet. Means are also provided for the addition of diluent and a surfactant into the slurry to control relative permittivity and the electrophoretic mobility of the particles.
- Research Organization:
- Illinois Institute of Technology, Chicago, IL (United States)
- DOE Contract Number:
- EF-77-S-02-4324
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4248686
- OSTI ID:
- 863788
- Country of Publication:
- United States
- Language:
- English
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Cross-flow electrofilter and method
Cross flow electrofilter and method
Related Subjects
electrofilter
method
filter
clarifying
carbonaceous
liquids
containing
finely
divided
solid
particles
instance
unreacted
coal
ash
solids
discharged
liquefaction
process
passageways
separated
porous
medium
preferred
embodiment
tubular
shape
form
passageway
enclosed
outer
housing
annulus
electrode
disposed
tube
axis
connected
source
voltage
establishing
electric
field
slurry
feed
flows
tangentially
surfaces
attracted
prevent
plugging
liquid
filters
withdrawal
concentrated
opposite
inlet
means
provided
addition
diluent
surfactant
control
relative
permittivity
electrophoretic
mobility
tubular shape
liquids containing
feed slurry
solid particles
outer housing
liquefaction process
electric field
preferred embodiment
coal liquefaction
finely divided
filter medium
carbonaceous liquid
porous filter
electrode disposed
slurry feed
unreacted coal
solid particle
prevent plugging
concentrated slurry
carbonaceous liquids
clarifying carbonaceous
solids discharged
divided solid
containing fine
containing finely
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