METHOD AND DEVICE FOR SEPARATION OF SUSPENSIONS BY CLASSES OF PARTICLES Russian patent published in 2005 - IPC

FIELD: regeneration of drilling muds and flushing fluids; concentration of minerals; separation of various suspensions and emulsions; purification of waste water and circulating water.

SUBSTANCE: proposed method includes delivery of suspension at pressure differential to device of separation of suspensions by means of sieving classification on filtering surface under flooded conditions at oscillation of suspension, discharge of filtrate, precipitation and discharge of solid phase sediment. Suspension in form of horizontal flow is first passed through labyrinth of oscillating plates and then is directed for sieving classification performed in pulse-wave mode of pumping the suspension through sieve due to reflected waves. Proposed method is performed by means of device having closed reservoir with stack of precipitation plates, sieve, branch pipe for delivery of suspension inside reservoir, suspension oscillation source, screw feeder for discharge of sediment and gas and filtrate discharge branch pipes. Precipitation plates are rigidly secured to housing by two fins and are hermetically fastened with housing and cover of reservoir; they are coupled together on opposite sides in form of combs, thus forming labyrinth in plan for passage of suspension; they have different sizes: minimum size at inlet and maximum size at outlet; plate of maximum size is used as reflecting shield. Sieve is placed in perforated rigid cassette and oscillation source is brought in contact with flexible wall of reservoir.

EFFECT: enhanced efficiency of separation, clay and sludge suspensions in particular which are used as drilling muds.

8 cl, 4 dwg