SU1549596A1 - Centrifuge of periodic action for dehydration of thixotropic material - Google Patents

Abstract

The invention relates to batch centrifuges of batch operation with mechanized sediment unloading and can be used in the metallurgical, chemical and other sectors of the industry for dewatering thixotropic and cementing materials such as steel smelting. The purpose of the invention is to increase the productivity of the centrifuge. The centrifuge contains a drive shaft, a cylindrical rotor 2 with a bottom 3, a feeding tube and collections of clarified water and a solid phase. Moreover, the lateral surface of the rotor consists of separate adjacent to each other buckets 7, having an upper conical part, forming an overflow board. Buckets 7 are attached to the bottom of the rotor by means of hinges 8 for their horizontal position during the period of unloading of the solid phase. In this case, the rotor is equipped with a device for fixing the buckets in a vertical position during the filling of the rotor with the suspension and sedimentation consisting of fins 9 attached to the outer wall of the buckets and mounted on the shaft coaxially with the rotor with the possibility of reciprocating movement of the cup 10, the side wall of which The end has an annular inner flare, which serves as a support for the ribs of the buckets. Such a centrifuge design allows for shorter unloading times and thus an increase in centrifuge productivity. 4 il.

Description

The invention relates to precipitation centrifuges of batch operation with mechanized discharge of sediment and can be used in the metallurgical, chemical and other industries of the industry for dewatering thixotropic and cementing finely dispersed materials such as steel sludge.

The purpose of the invention is to increase the productivity of the centrifuge.

FIG. 1 shows a vertical centrifuge, a longitudinal section; in fig. 2 is a view A of FIG. 1 (top view of the closed rotor and glass); in fig. 3 - centrifuge with an open rotor at the time of discharge of sediment, a longitudinal section; in fig. 4 is a view B in FIG. 3 (top view of the open rotor and glass at the time of discharge of the sediment).

The centrifuge contains a drive vertical shaft 1, a cylindrical rotor 2 with a bottom 3, a feeding tube k and collections of clarified water 5 and a solid phase 6. Moreover, the lateral surface of the rotor 2 consists of separate adjacent buckets 7 having an upper conical part forming an overflow board . The buckets 7 are attached to the bottom 3 of the rotor 2 by means of hinges 8 for their horizontal position during the period of discharge of the solid phase. In this case, the rotor is equipped with a device for fixing the buckets 7 in a vertical position consisting of ribs 9 attached to the outer wall of the buckets 7 and mounted on the shaft 1 coaxially with the rotor 2 with the possibility of reciprocating motion of the cup 10, the side wall of which has an annular inner flanging supporting ribs 9 with buckets 7.

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The node of the reciprocating movement of the glass 10 on the drive shaft 1 consists of a sleeve 11 moving up and down the shaft 1 without rotation attached coaxially to the bottom of the glass, bearings 12, housing 13 and hydraulic cylinder 1. The drive shaft is installed in the supports 15 and is attached to it electric motor 16. Glass 10 has drain pipes 17. Clips of clarified water 5 and solid phase 6 have corresponding drain pipes 18 and 19. Buckets 7 in a closed rotor 2 are joined along adjacent partitions 20.

The device works as follows.

The suspension fed through the feeding tube 4 enters the cavity of the rotor 2 rotating on the shaft 1 and is distributed by means of the bottom 3 evenly over the buckets 7. The clarified water and the excess of the initial suspension are poured over the top edge of the rotor, i.e. through the upper conical part of the buckets 7, and into the gaps between the partitions of 20 adjacent buckets 7. The moisture removed outside the rotor is trapped coaxially with the rotor and with the same angular velocity, the cup 10 and through the drain nozzle 17 is brought into the fixed container of the clarified water collector 5 with the nozzle 18 plum. The shaft 1 mounted in the supports 15 is driven in rotation by an electric motor 16. The dewatering process takes place at the nominal frequency of rotation of the electric motor. The cup 10 is maintained in the upper position, in which the rotor 2 is closed, i.e. the buckets 7 are in a vertical position with a device for fixing this position. In this case, the cup 10 with its inner ring flare abuts against the edge 9 of the bucket 7 and gives it to turn around the hinge 8 from the action of centrifugal forces. The cup 10 itself is held in the upper position by means of a hydraulic cylinder 1A of a reciprocating unit having a hinge connection with the housing 13. The housing 13 does not rotate, the rotation of the drinking glass 10 relative to the housing 13 is provided by bearings 12 mounted on the displacement sleeve 11.

After filling the buckets with sediment

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ten

Thus, the implementation of the invention makes it possible to shorten the unloading time due to the proposed mechanization of unloading, thereby, the proportion of the useful time spent actually on dewatering the product in the total cycle time increases, consequently, the productivity of the centrifuge increases.

Claims (1)

Invention Formula Batch centrifuge for thixotropic dehydration the suspension is stopped, electro- iik amaiui, “material, containing the prescribed on a vertical shaft there is a cylindrical rotor with a bottom, a feeding tube and collections of clarified water and solid The motor 1b brakes the rotation of the rotor; with the help of the hydraulic cylinder 1 cup 10 is brought to the lower position (Fig. 3). In this case, the edge 9 slides along the annular flanging of the glass 10, the buckets 7 rotate 90 ° and occupy a horizontal position, the rotor 2 opens. Next, the electric motor 16 is turned on, its rotational speed is brought to the values at which the sediment is unloaded from the rotor, the sediment is captured and taken out of the centrifuge using the sediment collector 6. Thereafter, the electric motor 16 is braked by, for example, counter-switching. By means of the hydraulic cylinder I, the cup 10 is brought to the upper position, the buckets 7 occupy the vertical position, the rotor is closed. Then the electric motor 16 is turned on, a new portion of the suspension is fed through the feeding tube t, i.e. the cycle repeats. 20 phases, characterized by that, in order to increase centrifuge productivity, the lateral surface of the rotor consists of separate adjacent buckets having an upper conical part forming the overflow side, the buckets are attached to the bottom of the rotor by means of hinges for their horizontal position during the period of solid phase discharge, the rotor is provided with a device for fixing the buckets in a vertical position, consisting of ribs attached to the outer wall of the buckets, and mounted on the shaft coaxially with the rotor with the possibility of returning ceiling elements nozzle movement, the side wall of which at the end has an annular inner eyelet serving as support ribs for ladles. thirty 35 959b ten Thus, the implementation of the invention makes it possible to shorten the unloading time due to the proposed mechanization of unloading, thereby, the proportion of the useful time spent actually on dewatering the product in the total cycle time increases, consequently, the productivity of the centrifuge increases. Invention Formula phases, characterized by that, in order to increase the production of centrifuges, the lateral surface of the rotor consists of separate adjacent buckets having an upper conical part forming the overflow side, the buckets are attached to the bottom of the rotor by means of hinges for their horizontal position during the period of unloading of the solid phase , while the rotor is provided with a device for fixing the buckets in a vertical position, consisting of ribs attached to the outer wall of the buckets, and mounted on the shaft coaxially with the rotor with the possibility of returning ceiling elements nozzle movement, the side wall of which at the end has an annular inner eyelet serving as support ribs for ladles. v & v 20