DE1160375B - Device for purifying water - Google Patents

Description

Apparatus for purifying water The invention relates to a device for purifying water with the aid of a suspension, consisting of a floating contact system with upper collecting channels, one within a central one Mixing chamber arranged agitation pump, which circulates the suspension, and Mud bags.

Devices for cleaning liquids are already known, which work on the principle of constant circulation, with a suspension being a certain consistency, e.g. B. from water or sewage that is used for clarification purposes treated with or without chemicals is created in a sludge contact zone. The contact zone is located in the lower part of a container and in the upper part Part of this container is the so-called clarification zone.

In the known devices for carrying out the suspended matter contact method the mixture of raw water, flocculation chemicals and recycled suspension guided in a central cylinder by means of agitator pumps from bottom to top and with With the help of a practiced, rinsed, open at the bottom and also concentric cylinder introduced into the surrounding clarification zone from the inside out. An even throughput the often very large clearing zone is not possible here, so that uncontrolled Currents arise that carry turbid matter with them. To avoid solid deposits on the The known devices are to avoid mostly very flat container soles often equipped with agitators and floor scrapers arranged on the bottom.

The present invention has a device as an object by which the aforementioned defects are eliminated. This is achieved according to the invention in that the central, downwardly widening mixing chamber lines are arranged pointing radially outwards, which are bent in the same direction at their ends and that an outer gap into which these lines open is provided.

In such a system, the mixture comes from the circulating suspension, Raw water and, if necessary, chemical sources in an area outside the immersion wall Annular space and moves down in it. After passing the lower edge of the baffle the proportion corresponding to the amount circulated becomes the inlet funnel of the central cylinder returned, during the part corresponding to the actual throughput of the system flows through the clarification zone from bottom to top. The clarification room is therefore all-round "Entwined", which results in favorable hydraulic conditions.

The device according to the invention aims deliberately at a "dynamic. Separation "of the water to be clarified from the mixture in circulation, caused by the sudden change in the direction of flow. It educates there is clearly a dividing line between the clarification zone and the one in circulation Mixture of.

Another feature of the invention is that the mud bags are arranged surrounding the lower part of the central mixing ducts and that the The container sole is designed as a central guide body.

According to the invention, it is also advantageous to subdivide the slipper pockets into individual chambers. An embodiment of the invention is shown in the drawing and will be described. 1 shows a section through a device according to the invention, and FIG. 2 shows a plan view of this device.

Figure 1 illustrates the mixing zone tank which is centrally located.

2 shows the radially arranged guide tubes or channels for the suspension from the mixing zone 1, which in this way passes from the mixing zone 1 into the annular space 3 arranged on the outside. By arranging bends or the like, a tangential introduction of the suspension into the aforementioned annular space is provided.

4 shows the contact zone and 5 the clarification zone. In the lower part of the central installation 1 there is a distributor plate 6. Under this distributor plate 6 , the raw water is guided tangentially through the line 7. 8 shows the guide funnel expanding downwards. This guide funnel is provided with sludge collection pockets on the outside. The overflow edge of these sludge collection pockets is approximately at the level of the Tre, nnebe, ne between the contact and clarification zones.

In the said constriction, a propeller 10 is arranged, which is set in rotation by a controllable gear motor. This sets the mixture in a circular motion and moves in the direction of the indicated arrows.

The chemicals are expediently added in the lower part of the mixing zone container 1.

The clarification zone 5 is surrounded on the outside with a wall 11, which with its lower edge in the contact zone 4 hineinragL the bottom of the container is provided as a centrally located guide member 12 aerodynamically designed so that a uniform on all sides inflow of suspension into the funnel-shaped guide member 8 into he follows.

13 shows the installation of partition walls in the sludge collector space, which is thereby divided into individual pockets 9 . 14 shows the discharge pipe or channels for the clarified water and 15 the collecting channel which surrounds the mixing zone 1 and ensures the discharge of the clarified water. 16 shows the discharge pipe for the clarified water.

The mode of operation of the device described is as follows: At 7 , the water to be clarified is introduced horizontally into the mixing zone container 1, specifically below the distribution funnel 6 . At the same time, if necessary, chemicals are introduced above the distribution funnel 6, but in the lower part of the mixing zone container.

Through the circulation flights 110 the raw water is intimately mixed with the chemicals and with the suspension already in the circuit. This suspension is indicated by dotted lines in FIG. 1. By regulating the speed of the circulating propeller, the fineness of the suspension can be influenced as desired. The finer the suspension, the greater the kiaric effect.

. From the mixing zone container 1 , the mixture reaches the outer annular space 3 horizontally via the lines 2. From this annular space 3 , the mixture passes down into the contact zone 4 and from there through the funnel-shaped guide element 8 into the mixing zone container 1. Some of the circulating However, the mixture present is drained upwards into the clarification zone, in terms of quantity according to the raw water supply.

By passing the mixture from the contact zone to the clarification zone from bottom to top, a dividing line is formed between the mixture and the clarified water at a very specific height. The density of the suspension must be regulated by intermittent or continuous flow. This takes place through the aforementioned centrally arranged sludge pockets 9, which can be subdivided by walls 13.

The upper overflow edge of these mud pockets is in the Separation line between contact zone and clarification zone. In this way it is achieved that an old or decomposition of suspended reaction products cannot occur.

In the upper part of the clarification zone, takes place continuously according to the Raw water inlet the discharge of the clarified water.

Claims (2)

PATENT CLAIMS: 1. Device for cleaning water with the aid of a suspension, consisting of a floating contact system with upper collecting chins, a stirring pump arranged within a central mixing chamber, which circulates the suspension, and sludge pockets, characterized in that at the central, downward expanding mixing chamber (1) lines (2) are arranged pointing radially outwards, which are bent in the same direction at their ends, and that an outer annular space (3), into which the lines (2) open, is provided that the sludge pockets ( 9) are arranged surrounding the lower part of the central mixing chamber (1) and that the container base is designed as a central guide body (12). 2. Apparatus according to claim 1, characterized in that the mud pockets are divided into individual chambers. Documents considered: German Auslegeschrift No. 1015 411; USA. Patent Nos. 2,411,386, 2,780,360.