SU1669486A1 - Thickening apparatus - Google Patents

Abstract

The invention relates to devices for separating the solid phase from the liquid, more precisely to the clarification of industrial circulating water, and can be used in the mining, chemical, construction and other industries. The aim of the invention is to increase the purity of the drain. The thickener includes a housing with a sludge collector, inlet and outlet nozzles, a package of inclined precipitation plates and spaced separation plates located between them. Under each slot separation plates placed floats. The sizes of the slots are smaller than the sizes of the floats. 3 il.

Description

The invention relates to devices for separating solid phase from liquid, more precisely to clarification of industrial circulating water, and can be used in mining, chemical, construction industries and in the agro-industrial complex.

The aim of the invention is to increase the purity of the drain.

Fig 1 shows a thickener, a general view; Fig 2 - a fragment of two precipitation channels; FIG. 3 is a section A-A in FIG.

The thickener includes a housing 1, the input pipes of the original pulp 2, the output of the condensed product 3, the clarified solution 4, the stilling chamber 5, the sludge collector 6 and the deposition unit 7. The deposition unit 7 consists of settling plates 8 and separating plates 9 between them. include a sheet with slots 10 covering the whole area of the sheet, floats

11, for example, in the form of balls, and the dimensions of the slits 10 are smaller than the sizes of the floats 11.

Plates 8 and 9 are connected at the bottom by a jumper 12, forming a pocket. Jumper 12 has a slope to the side wall of the case.

The thickener works as follows

The original pulp enters through pipe 2 into the soothing chamber 5, from it into the precipitation unit 7. In block 7, the pulp moves upward through separate channels. Each such channel is bounded above by a settling plate 8, from below by a separating plate 9. Solids under the force of gravity are deposited on the plate 9, fall on the float balls 11 and on the sections between the slots 10.

The buoyancy of the floats 11 is chosen a little more than zero, i.e. for embedding them need a little strength. Therefore, even a small amount of material turns out to be

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on the float 11, it will be submerged, move it away from the hole and slip through it to the underlying settling plate 8.

As soon as the sediment slides off the float 11. it floats up to its previous position due to positive buoyancy, blocking the corresponding slot 10. The effect of suction caused by the pressure difference above and below the separation plate also interferes with the movement of the floats 11 from slots 10. Above plate 9, the fluid moves faster than under it. Therefore, the pressure above the floats 11 is less than under them. When the float 11 sinks under the action of sediment, liquid flows from the lower zone into the opened slot 10. She, too, pushes float 11 into place. The upper zone of the sedimentation channel is again isolated from the bottom: the upward flow does not capture sediment on the plates 8. The thickness of the sediment on the plates 8 increases until the shifting component of the layer's weight exceeds the adhesion force. At this moment the whole mass of the layer begins to slide down. When creeping in, the sediment gets on the lintel 12, which directs it to the walls of the sludge accumulator 6, isolating it from the main pulp flow entering block 7.

The main advantage of the device is the almost complete isolation of the deposited material from the deposition zone. Separation plates provide automatic (but without automation) selectivity: they are permeable to particles, but impermeable to liquid, which

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could take them from the sediment to the drain. The penetration of particles and flocs through the plate 9 onto the precipitation plate 8 occurs at all points, which leads to a uniform distribution of the material on the plate 8. This eliminates jumps in speed and pressure, erosion of the sediment.

Balls, floats 11 can be made of foam plastic. As them, you can use expanded clay pebbles, etc. Instead of a spherical shape, it is possible to adopt a cubic, etc. The slotted sheet can be replaced with a metal or synthetic, woven or stamped 5 mesh. The distance from the float layer to the underlying plate should be such that a layer of sediment freely passes through this slit but does not float away from the holes.

The proposed thickener can significantly increase the purity of circulating water, which will affect the lengthening of the service life of pumps, pipelines, gate valves, cleanliness of factory premises, reduction of sludge losses, waste, etc.

Claims (1)

Invention Formula A thickener, comprising a housing with a slave storage unit, inlet and outlet pipes, a package of inclined precipitation plates and spaced separation plates located between them, characterized in that, in order to increase the purity of the drain, it is equipped with floats placed under each radius slot. telny plates, and the sizes of cuts are less than the sizes of floats, 0 five 0 TF - 4 12 fig 1 at at ten eleven eleven fig 2 Aa fih