Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1985-11-19
1988-05-31
Valentine, Donald R.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
20415742, 2041801, 204301, 210748, B01D 1302
Patent
active
047479205
ABSTRACT:
A method of separating a solid-liquid suspension (e.g. an aqueous coal suspension, a suspension of clay in oil) by concurrently subjecting the suspension to the action of a sonic or ultrasonic field and an electrical field so as to remove the liquid from the suspension. The suspension is moved into a solid-liquid separation chamber between opposing electrodes one of which is permeable to the liquid. The sonic or ultrasonic field is then applied to the suspension concurrently with the electrical field, at a frequency and amplitude adapted to cause the liquid to separate from the suspension particles. The concurrently applied electrical field between the electrodes causes the particles to migrate away from the permeable electrode and liquid to migrate toward the permeable electrode. The liquid is then removed through the permeable electrode. The method requires less energy to remove a unit of liquid, has a faster rate of liquid removal and achieves a lower liquid content than if only an electrical field or acoustical field were used separately or in sequence.
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Muralidhara Harapanahalli S.
Parekh Bhupendra K.
Senapati Nagabhusan
Battelle (Memorial Institute)
Valentine Donald R.
Wiesmann Klaus H.
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