RU2329851C2 - Process water treatment installation for removal of suspended particles - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to process water treatment technique for removal of suspended solid particles and can be applied for enrichment of natural resources and treatment of process water under subsurface and surface conditions of mines. The installation is composed of a framework of trapezoidal cross-section with flat plates. The framework is divided into several compartments separated by frames with cross-pieces. The upper edge of the first frame is inclined opposite to the direction of water flow; this frame is provided with steel strings. The second and other frames are fitted with pins at the upper and the middle cross-pieces. The upper edge of the plates encircles the pins and the lower edge of the plates passes freely into the recess in the lower or the middle cross-piece. The plates are made of zinc-plated sheet metal, the upper edge being bent by 180°, and the lower edge - by 30°. The upper surface of the plates is coated with linoleum.

EFFECT: increase of efficiency of water treatment and increase of capacity of the water treatment installation.

2 cl, 5 dwg

Description

The invention relates to techniques for purifying water from suspended particles under the action of hydrodynamic forces and gravity in a liquid medium, can find application in the enrichment of minerals and purification of process water.

Known thin-layer hydroclassifier (Aut. St. USSR No. 1172578, class B01D 21124, 08/15/85. Bull. No. 30) [1], comprising a housing with packages of inclined wave-like plates, a receiving pocket, an inclined dividing wall, supply and sludge channels, placed at the crests and troughs of the plates, a collection pocket with an overflow threshold for the withdrawal of purified water, vertical partitions of the supply channels and flaps of the overflow channels to control the input and output flows.

The disadvantage of the classifier is the overgrowth of interplate gaps in the package with sludge, as sludge is deposited in the oncoming liquid stream.

A thin-layer sump is known (Aut. St. USSR No. 1223955, class B01D 21124, 04/15/86. Bull. No. 14) [2], in which the inlet channel is blocked by a soothing grid, the supply channels are equipped with fairings, and the sludge channels are blocked by a partition.

Thin-layer sedimentation tank has the same drawback as the previous analogue - overgrowing of interplate gaps.

The closest technical solution adopted for the prototype is a thin-layer sump [3], made in the form of a filter partition such as blinds, the plates of which are installed at an angle of 55-60 ° to the horizontal plane, and the inlets and outlets of water and sludge are mutually arranged so that the outlet thickened sludge is located at right angles to the inlet and outlet of water, while equipped with an electric vibrator plates for cleaning them.

The main disadvantages of the device is the low performance of the sump, and the electric plate vibrator does not allow sludge to settle on the plates during its operation. The device does not take into account the physical property of water particles and plates.

The present invention solves the problem of clarification of process water, automatic cleaning of the plates and increasing the productivity and efficiency of water purification device.

The problem is achieved in that in a device including a frame with plates located at an angle of 50-70 ° to the horizontal plane, a tank for accumulating sludge and a mechanism for unloading sludge. The cross section of the frame is made in a trapezoidal shape and contains several sections separated by frames with lateral upper and lower central jumpers, the first frame with the flow of water is inclined with the upper edge towards the water flow at an angle of 45-55 ° and is made with holes in the side and central jumpers, in which steel strings are installed, and the second and subsequent frames are made with fingers on the upper and central jumpers, and the lower and side jumpers are with grooves for installing plates, while the plates are made from a zag 180 ° upper edge, which fingers freely cover, and 30 ° lower edge bend, which freely passes into the groove of the lower or lateral lintel so that the plates are located along the flow at an angle of 50-70 ° to the horizontal plane, the plates are made of galvanized sheet , and the upper side of the plates is covered with linoleum.

The invention is presented in the drawings.

Figure 1 presents a General view of the device with a channel of trapezoidal cross-sectional shape (side view).

Figure 2 presents a General view of the device with a channel of trapezoidal cross-sectional shape (top view).

Figure 3 presents a view of the device along section AA.

Figure 4 shows the shape of the plate with an upper bend of 180 ° and a lower of 30 °.

Figure 5 shows the nomogram of the efficiency of the device for specific conditions.

The proposed device has a frame 1, consisting of frames 2, 3, 4, pockets - sludge accumulators 5, plates 6. The first frame 2 on the side of the water flow is made with holes through which steel strings 7 are stretched, which in the flowing water form vortex paths of the pocket 8. The second and subsequent frames have side 9, upper 10, lower 11 and central 12 jumpers. Finger 13 is located on the upper and central lintels for hinging the plates 6, the upper surface of which is covered with linoleum 14. The lateral 9 and lower 11 jumpers are made with grooves for the free entry of the plates 6. The sludge unloading mechanism 15, in particular the conveyor, is installed at the bottom of the frame.

The trapezoidal cross-sectional shape of the device provides ease of installation in the water treatment channel, and the operating time provides the advantage of cleaning in the upper layers of the stream through which most of the water passes, from which the purified water is usually drained.

The maximum particle deposition path in the interlamellar layer is

where W is the distance between the plates, m;

α is the angle of inclination of the plates to a horizontal surface.

The device operates as follows. The process water flowing through the channel behind the first frame 2 with strings 7 forms the wave paths of the pocket and enters the second and subsequent sections with vibrations smaller than the distance between the plates W. Further, particles are deposited along the flow between the plates.

The wave paths of the pocket, falling into the inter-plate layer, “sweep” the settled particles from the upper surface of the plates into the sludge accumulators, from which the sludge is periodically unloaded using the unloading mechanism - conveyor.

The length of the device depends on the required water clarification efficiency. Performed in sections, it may contain a different number of sections.

As an example, we give a calculation of the efficiency of clarification of water from solid particles for conditions: flow of process water Q = 600 m ³ / h = 0.167 m ³ / s, working cross section of the water flow S = 2.1 m ² ; the flow velocity υ _в = 0.08 m / s, the distance between the plates W = 0.05 m = 50 mm.

A diagram of settled particles with a total plate length of L = 5 m is shown in FIG. 5, where R is the particle radius, ρ is the particle density,% is the percentage of settled particles.

Information sources

1. USSR copyright certificate No. 1172578. Thin-layer hydroclassifier. M. cl. ³ B01D 21124, 08.15.85. Bull. No. 30.

2. USSR copyright certificate No. 1223955. Thin-layer sedimentation tank. M. cl. ³ B01D 21124, 04/15/86. Bull. Number 14.

3. RF patent №2162004. The method of clarification of technological water in underground catchments with mechanized treatment. / V.V.Senkus, S.G. Fomichev, you. V. Senkus, K.S. Fomichev. M. cl. ³ B01D 21/02. Claim 11/06/1998. Publ. 01/20/2001. Bull. No. 2.

Claims (2)

1. A device for purifying process water from suspended solids, comprising a frame with flat plates located at an angle of 50-70 ° to the horizontal plane, tanks for accumulating sludge and a sludge discharge mechanism, characterized in that the frame is made with a trapezoidal cross-section and contains several sections separated by frames with side, upper, lower and central jumpers, the first frame with the flow of water is made with the upper edge inclined towards the water flow at an angle of 40-45 ° and made with holes in the side and central bridges in which the steel strings are installed, the second and subsequent frames are made with fingers on the upper and central bridges, and the lower and side bridges with grooves for installing the plates, while the plates are made with a 180 ° bend of the upper edge, which able to cover the finger, and a bend to 30 ° of the lower edge, which freely pass into the groove of the lower or lateral lintel so that their planes are located along the water flow at an angle of 50-70 ° to the horizontal plane. 2. The device according to claim 1, characterized in that the plates are made of galvanized sheet, and the upper side of the plates is covered with linoleum.

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