RU2468870C2 - Continuous-action centrifuge with cylindrical self-opening filtration wall - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to rotary fluid separators and may be used for cleaning, drying and flushing by filtration in chemical industry, mining, metallurgy and food industry. Proposed centrifuge incorporates vertical rotor fitted on drive shaft, initial product loader, and cases for collection and separation target products. Centrifuge rotor is equipped with cylindrical self-opening filtration wall to separate initial product and, at a time, to displace dried bulk into discharge zone. Extra stepless motor drive revolves said wall about rotor body.

EFFECT: higher efficiency.

7 cl, 5 dwg

Description

The proposed device is intended for the separation of liquid mixtures under the action of centrifugal forces by the filtering method and can be used in continuous technologies for cleaning, drying, washing (including multi-stage) in the chemical, mining, metallurgical, municipal and food industries.

The design of the proposed device is simple and reliable, can operate in harsh environmental conditions and loads while constantly restoring the characteristics of the filtering surface.

DESCRIPTION OF THE INVENTION

The closest analogue to the claimed device is a patent of the Russian Federation No. 2213626, class. B04B 3/08, B04B 7/08 2003: a continuous centrifuge containing a rotor vertically mounted on the drive shaft with perforated walls around which the drive conveyor filter belts are mounted, the rotor is made in the form of a box having a rectangular shape in section, and filter belts are mounted on two opposite walls of the rotor, more distant from each other, while the filter belts are provided with a separate drive.

The disadvantages of this design are:

- the use of conveyor filter belts, which requires complex cleaning devices and regular replacement of belts, as their filtering ability quickly decreases during operation;

- the use of a limited area for filtering, which leads to an increase in size and material consumption, and unproductive energy costs;

- the impossibility of using hard speed modes, because with an increase in centrifugal loads, conveyor belts will stop.

The objective of the invention is the continuous promotion of the drained mass by the filtering wall, unloading it from the rotor and the constant restoration of the characteristics of the filtering surface.

The problem is solved due to the fact that a continuous centrifuge with a cylindrical self-unloading filter wall, containing a rotor vertically mounted on the drive shaft, a device for loading the initial product, as well as casings for collecting and removing separated components, has a rotor equipped with a cylindrical self-unloading filter wall ( TSSFS) for separation of the initial product under the action of centrifugal forces and simultaneous movement of the drained mass in the discharge zone due to rotation I CSFS relative to the rotor housing using an additional stepless drive.

In the rim of the rotor casing evenly and equidistant from the axis of the rotor are mounted, with the possibility of rotation, support-drive racks, in the middle part of which there is a cylindrical channel equal to the height of the CSF, and in the upper and lower parts on the bulges there are separate annular grooves, while shoulders in height correspond to the thickness of the filter wall.

The cylindrical self-unloading filter wall is made in the form of a cylindrical spring from a rectangular profile with a tight laying of turns.

The spring profile is subjected to preliminary calibrated corrugation of the wide side, which becomes adjacent when the spring is formed, and the resulting cylindrical wall has a predetermined filtering characteristic.

TsSFS installed in the space above the rotor housing, limited by the support-drive racks on the supporting flanges, the upper and lower turns are divided into the corresponding annular grooves of the racks.

The beginning and end of the spring are interconnected, and this part of the profile has the form of a free coil of the opposite direction and is laid in a guide device, fixedly mounted on the rotor body.

The support-drive racks have a synchronous drive from a stepless pulse planetary-type variator located under the plane of the rotor casing, providing additional rotation of the CSF relative to the rotor casing.

The above new essential features, together with the known ones, are necessary and sufficient to achieve a technical result in all cases to which the requested amount of legal protection applies.

The technical result, together with the achieved functionality, is described below with reference to the accompanying drawings, in which:

figure 1 - schematically shows a continuous centrifuge with a cylindrical self-unloading filter wall;

figure 2 - schematically shows the placement of the upper, lower and free (reverse direction) turns in the space bounded by the support-drive racks, the cylindrical surface bounded by the lines of the upper and lower turns, there is a coil spring with tightly laid turns of a rectangular profile;

figure 3 - schematically shows a guide device;

figure 4 - shows the support-drive rack with a cylindrical channel in the middle part, with individual annular grooves in the upper and lower parts, with the placement of the CSF on it;

figure 5 - schematically shows the options for corrugation of the spring profile.

A continuous centrifuge with a cylindrical self-unloading filter wall contains a drive 1, on a vertical shaft 2 of which the rotor housing 3 is rigidly fixed. On the rim of the rotor housing, support-support posts 4 are also mounted vertically for rotation. Support-drive stands in their middle part have the channel is cylindrical in shape, and on the thickening in the upper and lower parts there are separate annular grooves 6. The thickenings in the upper and lower parts of the uprights form supporting flanges 5. This form of the supporting-driving uprights is equal to remote from the rotor axis and evenly distributed over the circumference, provides a stable placement on the rotor housing and an additional rotation about its takeover cylindrical filter wall (TSSFS) 7.

TsSFS installed in the space bounded by the support-drive racks 4 on the supporting flanges 5 in the form of a pre-formed coil spring from a corrugated rectangular profile.

The lower 8 and upper 9 turns of the spring are routed into the lower and upper annular grooves 6 of the support-drive posts 4, and the upper and lower ends of the spring are connected to each other with the formation of a free coil of the opposite direction 10, which is placed in the U-shaped channel 11 of the guide device 12 stationary relative to the rotor housing, and can move inside it. This allows you to have constantly open upper and lower turns of the spring, which ensures the opening of the filter wall in the upper part and the removal of the dried product from it under the action of centrifugal force, and the formation of the filter wall in the lower part.

The supporting-drive racks 4 have a continuation under the rotor body 3. On each of them are mounted a gear and a freewheel 16, which are driven elements of a planetary mechanical pulse variator. This drive is optional from the main one and provides the rotation of the DSSF relative to the rotor housing with a variable frequency from zero to maximum.

On the rotor housing, a work table 17 is fixedly mounted, having the form of a disk, the diameter of which is slightly smaller than the internal diameter of the CSF. The plane of the disk is placed above the lower edge of the CSF to take into account the effect of spreading of the loaded mass. In addition to the function of preliminary unwinding of the loaded mass and its uniform movement on the filtering wall, the working table can be provided with additional ones (for example, grinding function).

The principle of operation of a centrifuge continuous operation with TsSFS.

The rotor and TSSFS are untwisted by driving devices. The liquid mixture is fed through the loading device 13 to the surface of the rotor working table 17, from which, under the action of centrifugal forces, it enters the inner surface of the filter wall. The liquid phase under the action of centrifugal forces is filtered through the holes of the perforation CSF and collected in the casing-pan 15 for removal. An additional rotation of the TsSSF relative to the rotor ensures the movement of the drained mass along a helical path from the base of the cylinder to its upper edge — the discharge zone. The dried product is ejected by centrifugal force into the casing 14.

The pulse variator of the auxiliary drive allows you to change the speed of the DSPC from zero to maximum relative to the rotor housing, thereby changing the residence time of the drained mass on the wall of the filter cylinder.

Claims (7)

1. A continuous centrifuge, comprising a rotor vertically mounted on the drive shaft, a device for loading the initial product, as well as casings for collecting and removing separated components, characterized in that the centrifuge rotor is equipped with a cylindrical self-unloading filter wall for separating the initial product and simultaneously moving the drained mass into the unloading zone due to the rotation of the cylindrical self-unloading filter wall relative to the rotor casing using additional upenchatogo drive. 2. The centrifuge according to claim 1, characterized in that in the rotor casing of the centrifuge are equidistant from the rotor axis and evenly circumferentially mounted with the possibility of rotation of the support-drive racks with support flanges and ring grooves. 3. The centrifuge according to claim 1, characterized in that the cylindrical self-unloading filter wall is made in the form of a cylindrical spring from a rectangular profile with a tight laying of turns. 4. The centrifuge according to claim 3, characterized in that the spring profile is subjected to preliminary calibrated corrugation of the wide side, which becomes adjacent when forming the spring, and the resulting cylindrical wall has a predetermined filtering characteristic. 5. A centrifuge according to any one of claims 1 to 3, characterized in that the cylindrical self-unloading filter wall is installed in the space above the rotor housing, limited by the support-drive racks to the support flanges, and the upper and lower turns are divided into the corresponding annular grooves of the racks. 6. The centrifuge according to claim 3 or 4, characterized in that the part of the profile connecting the beginning and end of the spring has the form of a free coil of the opposite direction and is laid in a guiding device fixedly mounted on the rotor body. 7. The centrifuge according to claim 2, characterized in that the supporting-drive racks have a synchronous drive from a stepless pulse planetary-type variator located under the plane of the rotor casing, providing additional rotation of the cylindrical self-unloading filter wall relative to the rotor casing.

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