DE1924382U - DEVICE FOR CLEARING AND THICKENING LIQUIDS CONTAINING SOLIDS. - Google Patents

Description

Keyword: "clarifier"

Hüttenwerk Oberhausen Oberhausen / RhId., June 9, 1965 Corporation

St. Pat
Ca / Pa
1742

Files: H 37 787 / 85c Gm

Device for clarifying and thickening liquids containing solids.

The invention relates to a device for clarifying and thickening fine and finely grained solids containing liquids such as waste water or sludge sludge from coal and mineral processing.

With the known thickeners, the turbidity to be clarified becomes either just below the surface of the clarified liquid through inlet nozzles or inlet channels or abandoned with the help of special devices at a lower point of the container, whereupon the solid is more or less depending on the grain size, specific weight and speed of the flow quickly settles down and the clarified liquid rises to the top. In this simplest one Form, the known thickeners require long dwell times of the pulp in the clarification tank, which as a result must have relatively large expansions for a given liquid throughput.

There is also a thickening and classifying device known, which consists of a container with a funnel-shaped Floor and an adjustable drainage opening for the

1742 - 2 -

thickened pesticides as well as an overflow for owns the clarified liquid. The pulp is supplied here from a raised container a feed pipe reaching down to about the beginning of the funnel-shaped bottom. Ba is the cross section of the Feed pipe is relatively low, the pulp receives a high entry speed, which is true for the current classification intended in this case, but not suitable for a pure sedimentation process is how it is to be realized in the device according to the invention.

A clarifier is also known in which the Turbid liquid is fed to a clarification tank with a funnel-shaped bottom through two coaxial feed / iron pipes, of which the inner is deeper than the outer. The operation of this device is based on the Intended fluidization of the settled sludge, thereby separating the lighter particles of pesticide should be supported. A complete clarification of the turbidity can in this way, however, precisely as a result of the Resuspension cannot be achieved.

The invention aims at the known clarifiers to develop further so that the clarification effect Improved for a given clarification area load, i.e. the remaining solids content reduced, or at the same clarification effect, the pollution of the clarification area can be increased. Indeed, in this regard it was with

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the invention achieved such a far-reaching improvement, that even with significantly increased pollution of the clarification area, which lead to a considerable reduction in construction costs leads to a clarifying effect which is improved compared to the known thickeners.

For this purpose, the device according to the invention has the combination of the features that the cross-sectional area of the feed pipe is approximately in relation to the clarifying area 1:10 to 1:20 says that look at the feed pipe is known to expand conically at its lower end and that the upper end of the feed pipe as all around free overflow protrudes into a feed container.

By arranging the overflow on the feed pipe, the pulp to be clarified is in contrast to the known devices surrendered in a relaxed manner. The depressurized abandonment of the turbidity is made possible by the relatively large The cross-section of the feed pipe promotes and aims at an early start of sedimentation of the pesticides within the incoming turbidity. The conical widening of the feed pipe at the point of entry of the pulp in the container causes a diversion of the downward flowing as possible without vortices, already in the state of Liquid located in sedimentation in the actual settling space.

In particular, the device according to the invention the formation of a calm, relatively loose layer of sludge above the entry point

the turbidity favors, which has the advantage of filtering the air very finest specific, light solid particles offers.

In the drawing, a clarifying device according to the invention is shown in one embodiment.

The clarifier consists of a cylindrical part 1, to which the funnel-shaped bottom 2 is attached. In the middle of the container 1, the further feed pipe 3 is arranged, the lower end 4 of which conically expanded. Bas the upper end 5 of the feed pipe 3 protrudes into the feed container 6 and there forms an overflow for the fed into the feed container 6, sludge to be clarified. The feed pipe 3 with its conical extension 4 extends approximately to the beginning of the funnel-shaped bottom 2 and opens at a small distance above the actual sludge thickening zone 7. In the upper part of the thickening tank 1 is also the overflow channel 8 for the clarified liquid arranged.

The withdrawal of the thickened sludge is regulated by means of a valve 9 so that the sludge level is the required Height.

Claims (1)

Hüttenwerk Oberhausen Oberhausen / EhId., July 9, 1965 / Aktiengesellschaft η A irn mn An -t or at. p _at RA. 358 502 * 7/10/65 Öa / Pa
1742 File number: H 37 787 / 85c Gm Claim to protection; Device for clarifying and thickening ν on pesticides containing liquids, consisting of a container with a funnel-shaped bottom, an overflow for the clarified liquid and one about up to Beginning of the funnel-shaped bottom pulling down Feed pipe, characterized by the union of the Features that the cross-sectional area of the feed pipe (3) to the clarification area in a ratio of about 1:10 to 1; 20 says that the feed pipe is in is known to expand conically at its lower end and that the upper end of the Äufgaberohres as a free overflow all around into a feed container (6) protrudes.