HIGH-EFFICIENCY DYNAMIC SLURRY-LIQUID-SEPARATING FILTRATION APPARATUS AND FILTRATION METHOD THEREFOR Russian patent published in 2017 - IPC B01D33/21 

FIELD: chemistry.

SUBSTANCE: invention is intended for highly efficient dynamic slurry-liquid separation. Separator filter comprises cylinder body (1), filter pipe (2a) disposed in body, and a filter core disposed on filter pipe (2a), inlet (3) for material arranged on housing, outlet (4) for solid residue, located in lower part of housing, and outlet (5) for filtrate, located in middle-lower part of housing. Filter core comprises multiple filtration discs (2b) connected to pipe. Upper pipe end (2a) is connected to axis of rotation of variable-frequency motor (7). Upper part of housing and transfer shaft of motor are sealed by solid high pressure seal. Lower part of pipe (2a) is connected to pipe outlet (5) for filtrate by means of pipe connector (2c). Upper opening of pipe connector (2c) and rotating part connecting part of lower part of pipe (2a) of filter are sealed by solid high pressure seal. Lower part of pipe connector (2c) is sealed. Lower part of housing has a conical structure. Outer wall of housing is provided with layer (1a) of insulating jacket. Steam input (6) is located in middle-upper part of housing. Method for dynamic separation includes preliminary heating of filter, adding materials into housing, adjustment of rotation speed of filtration plates in range between 10 and 100 rpm, separation of filtration residue, discharge of filtrate. Filtering is continued and filter cake of filtration residue is allowed to accumulate on filter disc, achieving a certain thickness until pressure difference inside and outside filter pipe reaches 2.0 MPa. Increasing rotation speed of motor which drives filter disc to between 100 and 300 rpm, to remove filter cake of filtration residue from filter disc. When filter cake of filtration residue is removed from filter disc and pressure difference inside and outside is less than 50 kPa, rotational speed of motor is controlled. When filtering operation ends or filtration residue in lower part of filter needs to be released, filtration is stopped, filtration residue is removed for preparation of next filtration process.

EFFECT: higher efficiency of filtration.

9 cl, 3 dwg