SU1502053A1 - Radial thickener - Google Patents

Abstract

The invention relates to the dewatering of suspensions by thickening / settling / and can be used in various areas of the national economy, for example, in wastewater treatment for the enrichment of minerals. The aim of the invention is to increase the effectiveness of the clarification of the suspension. The radial thickener contains an elastic filter partition for coarse cleaning of a drain suspension with two groups of brushes and an elastic filter partition for fine cleaning of a drain suspension with a third group of brushes. The elastic coarse filtering partition of the drainage slurry is installed between the foam breaker and the inner, with respect to the thickener, wall of the drainage chute at an angle to this wall. The elastic filtering wall for fine cleaning of the drainage slurry is installed vertically on the upper surface of the wall of the discharge chute. Groups of brushes are mounted on the frame of the rowing mechanism. The first and second groups of brushes, located offset on both sides of the plane of the elastic coarse filtering partition, clean the pores of the partition from above and below, ensuring its continuous efficient operation. The bristle of the third group of brushes enters the pores of the elastic filtering wall of fine cleaning from the side external to the thickener. 1 il.

Description

The invention relates to the field of slurry dewatering by thickening, can be used in various areas of the national economy, for example, in wastewater treatment to enrich minerals.

The aim of the invention is to increase the effectiveness of the clarification of the suspension.

The drawing shows a part of the radial thickener, a vertical section.

The radial thickener has a housing (vat) 1 in which the frame 2 of the rowing mechanism is installed (the strokes are not shown). The wheel (ramp) 3 of the thickener rake’s frame rests on the rail 4,

The thickener around the perimeter of the tank. Along the perimeter of the thickener, the foam deflector 5 is fixed, which is fixed by holders 6. The drain chute 7 adjoins the thickener casing 1, on the inner wall (relative to the thickener) wall 8 of the drain chute 7 at an angle of 45 ° to wall 8 elastic filtering wall 9 of coarse cleaning, and directly on the upper surface of the wall of the drain trough 7 vertically installed elastic filtering wall K) fine cleaning. The filtering of the bulkheads with the gutter is carried out by the holder 11 of the filtering partitions.

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Pa rams 2 rake mechanism installed holders 12 brushes, which fix the first lower group of brushes 13 cleaning elastic filter partition coarse, the second upper group of brushes 14 coarse offset offset from the group of brushes 13 in the plane of the partition 9, and the third group of brushes 15 elastic filter partition 10 fine cleaning. The bottom group of brushes 13 is completely, and the top group of cleaning brushes 14 and the group of brushes 15 of fine CLEANING are almost completely below the suspension level 16 in the thickener tank 1.

Radial thickener works as follows.

The flow of the clarified suspension rises between the foam deflector 5 and the wall 8 of the discharge chute 7. At the same time, particles of solid relatively large classes are retained on the inner surface of elastic phi: 1 primary partition 9, and the final suspension passes through an elastic filter partition of fine cleaning. The cleaned suspension p. 1iva enters the discharge chute 7 and withdraws from the thickener. The resilient filter septum 9 is continuously cleaned in suspension particles suspended in its pores with nominees P1etok 13 and 14. The solids are bristled with nictoK 14 into the thickener tank (inwards), or if the bristles of brush group 13 are from the tank (outside).

The partition 9 is installed at an angle to the wall 8 (to the vertical). Such a setup corresponds to the average value of the slatiness (clay components) of the suspension. For example, for phosphate suspensions, it is 5–7% clay in the feed suspension. With a higher slime, the partition should be installed closer to the vertical (angle of 15 °), with a low content of sludge - almost horizontally (angle of 85 °). The vertical installation of the filter septum leads to the adhesion of clay at the base of the partition (holder 11), and the stuck clay can close part of the partition. The horizontal installation of the partition leads to the sticking of a thin film of slime from the bottom (smearing of the pores), and the film does not allow the slurry to pass through before cleaning with a P1 stitch (frame turn 2).

A more dense elastic filter partition 10 is cleaned by a cleaning race.

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a group of brushes 15 with thinner bristles, which push the stuck particles of thin classes inward during the penetration of the bristles of the brushes into the pores of elastic partitions 9 and 10, the elastic partition (e.g., filter cloth) bends and the vertical bending line moves with the frame moving 2 brushes. Elastic filter partitions are rinsed in suspension. This dynamic contributes to the release of pores from solid particles.

The use of the invention reduces the loss of solid with a suspension of thickeners.

The proposed thickener can be mounted on known devices, i.e. the radial thickener can be reconstructed without dismantling the building part, and filtering cloth was used as a filtering partition; 1) filter cloth was found to be widely used in the filtering sections of the same processing plants.

Claims (1)

Invention Formula A radial thickener comprising a cylindrical body with a conical bottom, a discharging and feeding device, a paddle mechanism mounted on the engine, a deflector, a drain chute and a filter element, characterized in that, in order to increase the effectiveness of clarifying the suspension, the filter element is made In the form of a single particle filter, the coarse partition of a drainage slurry with two groups of brushes and an elastic filter partition for fine cleaning of the drainage slurry with a third group of brushes, and the filter recess Although the rough cleaning is installed between the bottom wall and the inner side of the drain chute with respect to the thickener at an angle to this wall, the elastic fine filter screen is installed vertically on the upper surface of the wall of the drain chute, groups of brushes are installed on the frame of the rower mechanism, the first and the second groups of brushes are located on both sides of the plane of the elastic filter partition of the coarse cleaning of the drainage slurry with displacement one relative to the other, and a third group of brushes are installed with the outer in relation to the thickener side filtering walls fine cleaning.