DE3446741A1 - Method and device for generating horizontal flow motion in liquids - Google Patents

Abstract

Using suitable bodies of rotation rotating about a vertical axis in the centre of circular liquid containers, a horizontal circulating flow motion is imparted to the surrounding liquid, which motion is propogated as far as the outer rim of the pool. The object of the invention is to set all of the liquid in the circular pool structure into virtually uniform horizontal flow motion while using as little energy as possible. The invention is applied mainly in those cases where solids of a suspension held in cylindrical container structures are to be prevented from segregating or settling. Application examples are to be found in a wide range of industrial fields, especially in chemical industry and water and waste water engineering.

Description

Method and device

for generating horizontal flow movements in liquids. The invention relates to methods and devices with the features of claim 1.

If the solids in a suspension are to be prevented from which is located in a cylindrical container structure, segregate or settle, this can be done with relatively little energy consumption by generating a circular, horizontal flow movement of the liquid can be effected.

In practice there are essentially two methods known: which is a horizontal flow movement of a liquid in large cylindrical shape Create and maintain basins.

Once, large-format propellers are permanently installed in the pool, that the liquid jet accelerated by them gradually covers the entire liquid set in a rotational movement in the pelvis.

Besides the fact that most of them are equipped with complex underwater geared motors equipped propeller units are quite expensive and often prone to failure the disadvantage of this process technology is that that to the middle of the pool towards the horizontal flow velocity decreases sharply and thus the danger there there is segregation or deposits.

In the other variant of the method, the rotational movement is the Liquid generated in that from a circular circumferential on the pool edge Bridge which rotates around a support in the middle of the pool, dams are suspended immerse in the liquid and give it the rotating flow movement.

Augh with this system, the main disadvantage is that the flow rate decreases continuously to zero from the edge of the pool to the center of the pool.

The object of the invention is to develop a method with which it is possible to create circular horizontal flow movements of liquids in circular cylindrical building structures so that there are no great differences result in the flow rates at different points in the liquid. In particular, it should be avoided that there are areas in the liquid where the flow velocity approaches zero.

According to the invention, this object is achieved by the characterizing features of claim 1 solved.

The procedure outlined here can be used wherever in relatively large circular cylindrical. Liquid containers or structures segregation and weaning processes should be prevented.

Application examples can be found in the most diverse areas of Industry, but especially in the chemical industry and water and wastewater technology.

Preferred configurations and further advantages and details of the invention are the features of the subclaims, the following description and can be found in FIGS. 1-5. Figures 1-5 represent possible embodiments of the devices for carrying out the procedure.

It is the perspective view of different designed bodies of revolution, which are immersed in the liquid and around rotate its vertical axis (1). The rotary movement is usually driven by drive motors generated, which were not shown.

A body of revolution configured, for example, according to FIGS. 1-5, is immersed in or near the center of the container or pool in the liquid to be moved. The vertical shaft (2) of the body of revolution is usually above the Connected to the water level arranged drive motor and is rotated by this offset. This is in the liquid in the immediate vicinity of the rotating body initiates a rotating flow movement. This is the drag force of the liquid used on neighboring zones. The initially only central rotational movement spreads extends further and further to the outside and finally extends to the pool wall.

With the number of revolutions decreasing from the inside to the outside horizontal fluid movement is roughly the same in the entire basin high flow rate, so that to avoid segregation processes or deposits are the most favorable conditions.

The exemplary embodiments shown in FIGS. 1-5 for the rotation body show differently designed acceleration ribs (3-4-6), which are attached to the vertical shaft (2).

To avoid unwanted vertical suction flows through the Rqtationkörper To avoid it, it can be advantageous to use the acceleration ribs (3/6) with cover plates (5) as shown in FIGS. 3 and 4.

Because the ground friction causes the horizontal flow movement in the vicinity If the bottom of the pelvis is slowed down, it may also be appropriate to use the acceleration ribs (6) to enlarge with increasing immersion depth in the liquid, which is shown in Fig. 4 is expressed.

In order to achieve a stepless regulation of the circulation intensity, you can the cell-shaped acceleration ribs (3) by a co-rotating hollow cylinder (7) to be more or less covered.

Claims (9)

Method and device for generating horizontal flow movements in liquids claims 1. Circulation device for generating a predominantly horizontal circular flow movement of liquids in circular basin structures characterized in that in or near the center of the container with a perpendicular Axis (1) rotating body of revolution is immersed in the liquid. 2. Circulating device according to the preceding claim, characterized in that that the rotation body has cell-shaped acceleration ribs (3). 3. Circulating device according to the preceding claims, characterized in that that the end faces of the cellular acceleration ribs (3) are round end disks (5) received. 4. Circulating device according to the preceding claims, characterized in that that the body of revolution extends from the sole to the surface of the liquid. 5. Circulating device according to the preceding claims, characterized in that that the cell-shaped acceleration ribs (6) with increasing immersion depth in the liquid can be made larger. 6, circulation device according to claim 1, characterized in that the Rotary body has paddle-shaped acceleration ribs (4). 7. circulation device according to the preceding claims, characterized in that that at the same time a gas entered the liquid near the bottom of the basin will. 8. Circulating device according to the preceding claims, characterized in that that the Umwalzleistunq by one in the vertical direction over the acceleration ribs (3) displaceable hollow cylinder (7) is regulated. 9. Circulating device according to the preceding claims, characterized in that that the vertical shaft (2) is driven by a submersible motor.