SU1747175A1 - Centrifuge - Google Patents

Abstract

Use: separation of suspensions in the field of centrifugal forces. SUMMARY OF THE INVENTION: The centrifuge comprises a rotor including main blades, each of which consists of body 10 and two sieves 11 located on either side of the body to form chambers f2 for collecting L-A filtrate. The sieves of 11 rows of placed main lobes form pressure channels 15. Additional blades 14 are located on the periphery of the rotor in pressure channels 15 along their axis of symmetry, having a sector shape in longitudinal section, the top of which is facing the feeder located in the center of the rotor. The main and additional blades are located radially. The holes 7 in the rotor sidewall 5, which serve to exit the sediment, are placed between the screens 11 and 18 of the main and additional blades. Such an embodiment of the centrifuge allows to increase the area of the filtering surface of the rotor in the zone of maximum centrifugal action, increase the driving force of the separation process on the screens of the main blades and thereby increase the centrifuge performance. 2 sludge. с с 2 V СЛ 19 Ј 14 Fig 2

Description

The invention relates to equipment for separating liquid suspensions in the field of centrifugal forces, namely, continuous filtering centrifuges with a paddle rotor.

The purpose of the invention is to increase productivity.

FIG. 1 schematically shows a centrifuge, a vertical section; in fig. 2 is a section A-A in FIG. one.

The centrifuge 1 contains a rotor 2 mounted on a housing on a vertical driving lag, comprising a cover 3. a bottom 4, a shell 5, windows 6 for supplying slurry and holes 7 to a shell 5 for exiting the sediment, feeding device 8, main blades 9, each of which consists of a housing 10 and two sieves 11 located on either side of the housing 10 with the formation of chambers 12 for collecting filtrate, in which in the bottom 4 of the rotor 2 circumferentially placed slits 13 for draining the filtrate and additional blades 14 located on the periphery of the rotor 2

The sieves 11 near the located main blades 9 form pressure channels 15.,.

The centrifuge contains a filtrate collector 16 and an annular chamber 17 for sludge removal. .

Each additional blade 14 is located in the pressure channel 15 along its axis of symmetry, passing along the radius, and in the longitudinal section has the form of a sector, the top of which is facing the feeding device 8.

Additional blades 14 have chambers 19 for collecting the filtrate, in which in the bottom 4 of the rotor 2 circumferential slots 13 are placed for draining the filtrate.

The centrifuge works as follows.

The initial suspension under pressure is fed through the feeding device 8 into the rotor 2 and further through the windows 6 into the pressure filtering channels 15, which gradually expand from the center of rotation to the sidewall 5 of the rotor 2.

The driving force of the separation process on the screens of the main blades 9 is the force of hydrodynamic pressure normal to the surface of the filter sieves, and the driving force of the process of separation on the screens of the additional blades 14 is the force of hydrodynamic pressure and the normal component of the centrifugal force

On the screens 11 of the main blades 9, under the action of the hydrodynamic pressure force, the suspension is divided into solid and liquid fractions. In the process

Filtration creates a layer of sediment to help improve fluid purification. The sediment layer formed on the filter screens of the blades 9 moves to the periphery under the action of centrifugal force. Thus, the filtering surface of the radially arranged filter screens of the 11 main blades 9 is continuously self-cleaning.

At the same time in the pressure channel 15 under the action of centrifugal force, the process of larger particles moves to the filtering screens 18 additional blades 14. Since the additional blades 14 are placed on the axis of the pressure channel 15, the flow with the tip of the blade is divided into two equal parts.

Under the action of the normal component of the centrifugal force, the force of hydrodynamic pressure on the screens 18 of the additional blades, the separation process takes place.

The filtrate through sieves 11, 18 enters the chambers 12, 19 of the main 9 and additional 17 blades and through the slots 13 is removed from the rotor 2 into the collector 16 and further along the nozzle is removed from the centrifuge. The sediment is transferred between the screens 11, 18 of the main 9 and the additional 14 blades, and through the holes 7 it is withdrawn into the annular chamber 17 and further removed from the centrifuge.

The use of the invention in the national economy will allow to increase the area of the filtering surface of the centrifuge rotor in the zone of action of maximum centrifugal force, increase the driving force of the separation process on the screens of the main blades and thereby increase the productivity of the centrifuge.

Claims (1)

Invention Formula A centrifuge containing a housing with sediment and filtrate collectors mounted in a housing on a vertical drive shaft, a rotor comprising a bottom, a lid, a shell with openings for sludge outlet and a blade, each of which consists of a housing and two sieves located on either side of the housing the formation of chambers for collecting the filtrate, and a feeding device with openings for the passage of the suspension, located opposite the pressure channels formed by the screens of a number of placed blades, characterized in that. that, in order to increase productivity, it is equipped with additional blades located on the periphery of the rotor in the pressure channels along their axis of symmetry and having a longitudinal section of a sector with the aperture of which faces the feeding device, the main and additional blades are located radially and have holes in the shell serving for exit sediment placed between the screens of the main and additional blades. source product four 16 17 Shg.1