SU990261A1 - Thickener - Google Patents

Description

(54) COUPLER

one

The invention relates to a device for thickening sludge and clarifying a slurry, and can be used to clarify slurry waters and thicken slimes while enriching minerals, such as coal.

Known thickener for clarifying wastewater and thickening slimes, having a body, loading and unloading devices, precipitators 1).

The closest in technical essence and the achieved result is a thickener having a cylindrical conical body, a loading device consisting of a vertical central supply pipe with horizontal curved tubes and a discharge device 2.

However, the known device has insufficient technological efficiency. The degree of thickening of the sludge in it is limited due to the lack of mechanical movement of the sludge, which, in turn, complicates the technology for further processing (dewatering) of the sludge, since additional re-concentration is required.

The purpose of the invention is to increase the efficiency of the thickener by increasing the degree of sludge thickening.

To achieve this goal, in a known thickener having a cylindrical-shaped body, a loading device consisting of a vertical central supply pipe with horizontal curved tubes and a discharge device, the vertical central supply pipe is rotatably mounted, and

The 10 horizontal curved tubes are arranged in heights in height and are equipped with bridges connecting the tubes of adjacent Russes.

FIG. 1 shows a thickener, a general 15 form; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The thickener body consists of two parts: a cylindrical G and a conical 2. In the body there is a loading device consisting of a vertical central tube of a melting pipe 3 with 4 curved horizontal feed pipes extending from it in several tapers of the conical part of the body. The curved ends of the feeding tubes 4 are turned in opposite directions and, to regulate the load, have special nozzles (nozzles) 5. The feeding tubes 4, located at different heights in different shades, are interconnected by bridges 6.

In general, the design of the loading device, which includes several Rus feed pipes 4, connected by jumpers (), while rotating the central feed pipe 3 simultaneously serves to seal. Kim sediment.

In the upper part of the housing there is an annular drainage chute 7, and below the conical part there is a discharge device, which can be performed, for example, in the form of a blade sectional rotor or a cork valve.

The thickener works as follows.

Sludge water along with a reagent for flocculation under a certain pressure is supplied to the conical part 2 of the thickener through the central supply pipe 3, the horizontal supply curved tubes 4 and nozzles 5. Due to reactive forces arising from the outflow of water from diameters of the supply tubes (or from a special drive), a loading device consisting of a central supply tube 3 horizontal curved supply tubes. 4 with nozzles 5 connected by the jumper Mil 6, gets rotation.

Due to the slow rotation of the loading device, favorable conditions are created for the efficient movement of the suspension with the flocculant and the flocculation of the solid particles, which ensures effective clarification of the water. The clarified water rises into the upper (cylindrical) part of the thickener, flows over its edge into the annular discharge chute 7, and is discharged into the water circulation system. The resulting large floccules and their aggregates under the action of gravitational forces are deposited in the conical part of the thickener 2. But the floc aggregates contain a lot of internal water, so the sediment is loose.

The loading device, slowly rotating, with its feeding tubes 4 and bridges b, mechanically acts

on a loose sediment, due to which aggregates of floccules are destroyed and the internal water contained in them is released. The rotating bridges 6 form annular channels in the sediment through which the water is released and rises upward and goes into the cylindrical part of the thickener. This reduces the porosity of the sediment (it condenses), the solid content in it increases, i.e. the degree of condensation increases. Compacted sediment at a given speed

is removed from the thickener by means of a discharge device 8.

The proposed thickener provides a condensed product with a solid content of 1000 kg / m, i.e., 2-3 times higher concentration than when using known thickeners. Such a product is effectively dehydrated without further thickening, i.e., the cost of processing the slimes is reduced. At the same time, a good degree of clarification of water is provided, which makes it possible to reuse it for technological purposes and, accordingly, reduces the loss (discharge) of waste water from the wastewater and reduces environmental pollution.

Claims (2)

1. USSR Author's Certificate No. 382420, cl. On 01 D 21/00, 1973. 2. Japanese Patent No. 49-40263, cl. 72 C 311, 01.11.74.