SU1523164A1 - Hydraulic classifier - Google Patents

Abstract

This invention relates to a technique for the processing of granular materials in the mining, chemical, construction and other industrial sectors. The goal is self-regulation of the processes of classification and unloading of a large product by stabilizing the density of the pulp in the classifier. Coaxial to body 1 of the classifier in its upper part is placed loading pipe (T) 2, and in the lower part - discharge pipe (P) 4. Drain chute 3 is installed along the perimeter of the upper part of body 1. Perforated bottom is placed in case 1 below the upper end of П 4 5 with a device 6 for supplying water under it. In the boot T 2 concentric with a gap to the P 4 installed pressure T 7 with the socket 8 at the bottom. The diameter T 7 is smaller than the diameter P 4 and the diameter of the socket 8 is equal to the diameter P 4. The upper end T 7 is located above the upper edge of the housing 1 to compensate for the piezometric pressure of the pulp in the classifier and the pressure loss in T 7 by the pressure of the water column in T 7 The end of the T 7 is placed on the P 9 for the introduction of water. Above bottom 5 a large product is concentrated. Through P 9, with constant flow, water is supplied to T 7, which creates a source in the gap between the ends of bell 8 and P 4. Mixing with the counter-flow of water, the large product passes through P 4 and further into the soil collector 11. Due to this, a clear the boundary between the classified pulp and the product in the soil collector 11. In this case, the density of the pulp stabilizes spontaneously. 1 il.

Description

ate

with

centrally, with a gap to П 4, the pressure head T 7 is installed with the socket 8 at the bottom. The diameter of T 7 is less than the diameter of P 4, and the diameter of the socket 8 is equal to the diameter of P 4. The upper end of T 7 is located above the upper edge of the housing 1 to compensate the pressure of the water column in T 7 for the sum of piezometric pulp pressure in the classifier and the pressure loss in T 7 The end of the T 7 is placed on the P 9 for the introduction of water. Above bottom 5 a large product is concentrated.

Through P 9 with constant flow to T 7 water is supplied, which creates a source in the gap between the ends

sockets 8 and P 4. Mixing with a counter flow of water, a large product passes into P 4 and further into the soil collecting container 11. Due to this, a clear boundary is reached between

classified pulp and product in the soil collector 11. In this case, the density of the pulp stabilizes spontaneously. 1 il. .

The invention relates to a technique for the processing of granular materials and can be used in the mining, chemical, construction and other industrial sectors.

The purpose of the invention is to self-regulate the processes of classification and unloading of a crucible product by stabilizing the density of the pulp in the classifier.

The drawing shows the classifier, a vertical section.

The classifier has a housing 1 placed coaxially with the housing in its upper part loading pipe 2, installed along the perimeter of the upper part of the housing drain chute 3, located coaxially with the housing in its lower part, the discharge port 4 placed in the housing below the upper end of the discharge nozzle perforated bottom 5, device 6 for supplying water under the perforated bottom 5. a pressure pipe 7 with a bell 8 at the bottom and a water connection 9 located below the upper end of the pressure pipe 7. The latter is installed in the loading tube 2 it is concentric with a gap to the discharge pipe 4. The diameter of the pressure tube 7 is smaller than the diameter of the discharge pipe 4, and the diameter. The socket 8 is equal to the diameter of the discharge port 4. The upper end of the pressure tube 7 is located above the upper edge of the housing 1 to compensate for the piezometric pressure of the pulp in the classifier and the pressure loss in the pressure tube 7 by the pressure of the water column in the porous tube.

The discharge tube 7 has a branch pipe 10 for draining excess water.

The discharge pipe 4 communicates with the soil collector t1 connected to the exhaust pipe 12, equipped with a check valve 13 with compaction layer 14. The valve 13 is fixed on the lever 15, having a hinge 16. and weight 17. The wall of the soil collector 11 is connected to the valve 13 A flexible membrane 18 connected to the stem of the reciprocating mechanism 19 is embedded. The height of the open end of the pressure tube 7 from the drain mirror of the classifier and the size of the gap between the ends of the bell 8 and the pipe 4 are set such

that for a given flow rate of water through the pipe 9 and the tube 7 is completely filled, the specified density of the pulyp in the classifier and the flow rate of the large product into the soil collector 11 are ensured. The mass of the load 17 both - presses the valve pressure. 13 with a force equal to the hydrostatic pressure on the valve.

Hydraulic classifier

works as follows.

The original pulp enters through pipe 2 into classifier housing 1, where it is separated by the flow of water through pipe 6, the large product concentrates over the perforated bottom 5. Water is fed through pipe 9 into the pressure pipe 7 with a constant flow, which creates a flow in the gap the ends of the bell 8 and the pipe 4, the large product, mixed with the counter flow of water, passes into the discharge pipe 4 and then into the soil collecting container 11, where it is deposited. Bending

The diaphragm 18 under the action of the rod of the mechanism 19 for reciprocating movement during the forward stroke shifts the sediment along the discharge pipe and unloads it through the shut-off valve 13. During the reverse stroke, the valve closes and the sediment from above flows to the diaphragm. The capacity of the membrane is set slightly higher than the maximum possible consumption of a large product, therefore the height of the sediment in the soil collector is reduced to such an extent that its resistance to shear up into the bent collector becomes less than the shear resistance along the pipe. At the same time, the sediment movement to the shut-off valve is stopped, and the movements of the membrane cause the sediment and pulp to oscillate in the soil collector. The oscillations are transmitted by a less viscous medium in the pressure tube and are not significantly reflected in the classification process. As sediment accumulates, its displacement and unloading periodically resume. The sludge flow rate through pipe 12 determines the accumulation of a large product in the soil collector and stabilizes spontaneously without additional automation. the open end of the pressure tube, the flow rate of the product into the soil collector increases, until the change in outcome is compensated feeding, and the pulp density is stabilized at a predetermined value. When the accumulation of a large product in the classifier decreases, the pressure of the pulp decreases and, accordingly, the consumption of the product in the soil collector decreases, the density of the pulp decreases to a lesser extent than the accumulation of a large product, and is restored after the increase in the input of a large product to the classifier.

When the classifier operates, a flow of water is created in the gap between the end face of the bell end of the pressure tube and the discharge pipe to meet the flow of the large product, by which the product flow is controlled

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And the density of the pulp in the classifier, a clear boundary is reached between the classified pulp and the product in the soil collector. The upper open end of the pressure tube is set at such a height that the hydrostatic pressure of the pulp and the pressure loss are compensated. An increase in the mass of the product in the classifier, which occurs due to the unevenness of the initial feed, causes pulp pressure to rise. the overflow of water from the upper end of the discharge tube and the increase in the flow rate of the product into the soil collector until the pulp cavity in the classifier is reduced to a predetermined value. By reducing the mass of the product in the classifier, its consumption in the soil collector is reduced to the restoration of a given pulp density. Thus, the density of the graded pulp is stabilized spontaneously, which simplifies the regulation of the classification. The sediment in the soil collector during the forward running of the membrane advances through the discharge pipe and is discharged through a shut-off valve. valve. The movement of the membrane causes the sediment and fluid to oscillate in the primer and pressure tube until a sufficient layer of sediment builds up again and its shift to the shut-off valve is restored. Thus, sediment consumption is determined by its accumulation in the soil collector and changes spontaneously without the use of automation equipment.

Claims (1)

Invention Formula T is a hydraulic classifier that includes a housing placed coaxially with the housing in its upper part, a loading pipe, a drainage chute mounted along the perimeter of the upper housing, coaxially with the housing in its lower part, a discharge outlet, placed in the housing below the upper end of the discharge outlet, and a perforated bottom for supplying water under a perforated bottom, characterized in that, in order to self-regulate the processes of classification and unloading of a large product due to stabilization7 15231 648 pulp density in the classics, the diameter of the discharge tube of the spout, it is equipped with a discharge tube displaced above the upper edge of the body with a socket at the bottom and a pipe fitting to compensate for the column pressure sideways to inject water placed in the discharge tube the piezoelectric top end of the pressure tube, the metric pressure of the pulp in the class-ifically, the pressure tube is installed in the extractor and the pressure loss in the pressure head in the loading tube is a concentric tube, with a gap to the discharge port.