SU385626A1 - DEPRESSANT CENTRIFUGE - Google Patents

Description

one

The invention relates to centrifugal devices used for clarifying liquids and can be applied in the coal, mining, chemical, food and other industries where mechanical cleaning of liquids is necessary. In addition, under certain conditions on this centrifuge, it is possible to classify thin sludge.

Precipitation centrifuges are known with a vertical arrangement of a rotor having the shape of an α-split cone, the lower base of which has a disk with openings for outputting a thickened solid phase. These centrifuges also contain a clarified liquid receiver and a pipe for introducing the suspension into the rotor.

In order to increase the efficiency of separation of suspension B of the proposed centrifuge, a cyclone chamber is placed under the rotor, which serves to further separate the condensed solid phase emerging from it. The disk is made with vanes for tightening the latter, placed on the side of the cyclone chamber, and with a central cone inlet for feeding the liquid phase from the cyclone chamber to the working ZON} - rotor. An additional horizontal orifice disk can be installed inside the rotor to divide the working space of the rotor into upper and lower working areas, the first of which is intended for additional clarification of the liquid. Inside the conical 5 nozzle, the blades may be located along its generators to set the liquid returned to the rotor at a speed equal to the rotor speed, and to regulate the number of

0 The working space of the liquid cyclone chamber can be equipped with a device in the form of a shank mounted on it with the possibility of its reciprocating movement along the vertical of the valve.

5 In FIG. 1 schematically shows the proposed centrifuge, longitudinal section; in fig. 2 is a section along the AL in FIG. one; in fig. 3 is a section along BB in FIG. one.

The case / vertical precipitation centrifuge is made of two parts - receiver 2 of the clarified liquid and cyclone chamber 3 having the shape of a body of rotation (for example, cylindrical) located in its lower cylindrical part

5 4 discharge device 5 for discharging condensed sediment. The discharge device 5 has a valve 6 which moves tangentially to the cylindrical part 4 of the chamber 3 and is installed in a tangential manner.

0 located nozzle 7 for the release of a thick sediment. The receiver of the clarified liquid is provided with a cover 8 with a nozzle 9 for draining the clarified liquid, in which a regulating device equipped with a handle 10 is installed in the form of a rotary disk 11 with an opening 12 for discharging the liquid. This device allows you to maintain in the receiver 2 a certain pressure, balancing the pressure of the fluid in the chamber 3. The receiver of the clarified liquid and the cyclone chamber are separated by a ring 13 that prevents the liquid from flowing from chamber 3 to receiver 2. In the inner cavity of the housing / there is a rotor 14, made in the form of a truncated cone with a large lower base 15. This base is equipped with a disk 16. At the top, the working area of the rotor 14 is limited to disk 17. On the periphery in disks 16 and 17 there are windows 18 and 19, respectively, for the release of thickened sludge and clarified liquid. The rotor 14 is driven into rotation by the actuator 20 through a hollow shaft 21, inside which a stationary feed pipe 22 passes. In the cavity of the rotor 14 there is a distribution disk 23. The working area of the rotor 14 is divided by a horizontal additional disk 24 into two parts - a settling chamber 25 (lower) and a drain camera 26 (top). The sedimentation chamber 25 is designed to receive the source material, precipitate solid particles on the walls of the rotor and discharge the sediment under the action of a centrifugal and gravitational force. Drain chamber 26 is designed to create a zone of sludge and discharge the clarified liquid. The disk 24 is provided with openings 27 for transferring liquid from the settling chamber 25 to the discharge chamber 26 and moving the settling sediment in the opposite direction. The disk 16 has blades 28, which rotate with the rotor and cause the rotating material in the cyclone chamber 3 to seal the sediment and displace excess liquid from it. The boevat of liquid from the cyclone chamber 5 for additional clarification into the precipitation chamber 25 is carried out through a conical pipe 29 fixed on the disk 16. The amount of liquid coming from the cyclone chamber 3 to the rotor 14 is regulated by means of a valve 30 equipped with, for example, a mechanism 31 to move it vertically. The blades 32 are located in the inner cavity of the conical tube 29, which serve to bring the liquid entering the additional clarification into rotation with a speed equal to the speed of rotation of the rotor 14. The described centrifuge operates as follows. The source material through the stationary feed pipe 22 enters the distribution disk 23 into the precipitation chamber 25. Under the action of centrifugal forces arising from the rotation of the rotor 14, solid particles in the liquid are deposited on the inner surface of the rotor 14 and move to the discharge ports 18 on the disk 16 and through them get into the chamber 3. This chamber works similarly to a hydrocyclone. The clarified liquid from the sedimentation chamber 25 flows through the holes 27 of the disk 24 into the chamber 26. Here the liquid finally settles and is discharged through the drain ports 19 in the upper disk 17

the receiver of the clarified liquid, and from there it is removed through the opening 12 and the nozzle 9. The precipitate and the liquid that came from the rotor 14 through the windows 18 into the cyclone chamber 3, under the action of centrifugal and gravitational

forces and downward fluid flow move to the lower part of it, where they further condense and discharge through the pipe 7, equipped with an adjustable discharge device 5. A part of the liquid separated from the sediment in the cyclone chamber 3 returns to the working space of the rotor 14 through the pipe 29. Liquid volume flowing into the rotor is controlled by valve 30.

Subject invention

Claims (4)

1. A sedimentation centrifuge containing a vertically mounted rotor having the shape of a truncated cone, a larger lower the base of which is provided with a disk with holes for outputting a condensed solid phase, a pipe for supplying the suspension to the rotor and a receiver of the clarified liquid, characterized in that, in order to increase the efficiency of the separation of the suspension, a cyclone chamber is installed under the rotor, which serves to further separate the outgoing it condensed solid phase, while the disk is equipped with blades for tightening the latter, located in the cyclone chamber, and a centrally fixed conical nozzle for feeding the liquid phase from the cyclone chamber to the working area of the rotor. 2. A centrifuge under item 1, characterized in that an additional disk is installed inside the rotor, dividing its internal space into upper and lower working zones and having openings for the passage of sediment and liquid from zone to zone, while the upper The working area serves to further clarify the liquid. 3. A centrifuge according to claim 1, characterized in that the inside of the conical tube along its forming blades are located to bring the liquid returned to the rotor to rotate at a speed equal to the speed of the rotor. 4. A centrifuge according to claim 1, characterized in that the cyclone chamber is provided with a device to regulate the amount of fluid entering the cone pipe, which is a valve mounted on the rod, installed with the possibility of its reciprocating movement along the vertical. Rig Z