DE170460C - - Google Patents

Description

PATENT OFFICE

M 170460 CLASS 85 c.

Sewage treatment plants, which are set up according to the so-called biological system are, as a rule, equipped with oxidation filters in which the rotten Liquid is subjected to post-cleaning. To this end, the rotten Liquid accumulated in the oxidation filter for a short time and then after the street canal or drained into a watercourse.

ίο To revive the filter mass must these then remain unused for several hours so that the air can penetrate them sufficiently can. One of the oxidation filters must therefore always be out of order during the other is filled.

The present invention now relates to an apparatus in which the alternately Filling and emptying of the filter container is effected automatically.

The apparatus consists essentially of the inflow channel α, which is mounted in a known manner on the cutting edge b in such a way that it can make rocking movements, furthermore of the two swimmers g and g ', which are also connected in a known manner, and finally of the two movable lifters d and d ', one leg of which is tightly and firmly connected to the liquid containers c and c'.

The liquid is BEZW through the line e or in some other suitable manner. the inflow channel α supplied and, after the box-like space has been so filled, passed to the container c . If the water level in the container c has risen sufficiently high, the float g, supported by the liquid in the space f , flowing to the space / 'and thus serving as ballast , causes the channel a to tilt in a manner known per se.

The liquid is thereby forced to make its way through the space ₁ / 'to the container c' .

When the channel α is tilted, the crossed jacks d and d ' made movable by using flexible metal pipes, rubber sleeves or the like, connected to it by booms and joints, are lowered and / or. upscale.

The contents of the container c must therefore drain through the siphon d, which is now deeper than the surface of the pent-up liquid.

In the meantime, the filling of the container c 'begins. If the liquid has risen to the level of the float g ' , the channel a is, as already described, tilted back into the initial position _t. If the flow of water continues, these processes are repeated, so that alternating filling and emptying of the two liquid containers is ensured.

The outflow time of the liquid can be determined by suitable selection of the clear width of the Siphon pipes can be regulated as required, whereby it must be ensured that the

one container is emptied in a shorter time than the filling of the other container.

It is true that devices with alternating filling and emptying are biological Filters are known, which are controlled by tilting vessels, but were, if lifters were used, only bell lifters installed inside the filter basin were used.

ίο To effect the suction of these lifters, the bell that stood tall had to move into the push up a cylindrical approach under her located water, so that it is pour into the stationary siphon pipe, and could put the lifter into action. This The process requires that the water in the containers is high enough that the Butt of the bell foot tight! concludes and that finally the downward movement of the piston done with sufficient speed. Since now the tilting vessel is precisely measured Water flows to the filter container and the capacity of the in the filter container · the filter material located in accordance with its coarse and fine grain size and the degree of silting fluctuates, so too will the water level in the Place the filter container at very different heights, yes: it will very often happen that: the Liquid immediately after the Tipping container, especially if the filter material is silted up, like this. high that it rises above that Edge; of the siphon pipe flows out and <activates the siphon before the desired cleaning is completed.

There. also the amount of water to be driven upwards for the suction of the siphon is rather small, SO; a failure ^ of the jack will always occur when the water level; in the filter basin _{: it is} low and i the bell lifter does not move downwards with sufficient speed. If the siphon bell is insufficiently sealed against the cylinder wall, the water will also emerge laterally.

The loss of water when moving the siphon bell down will therefore be so great that that the rest of the high-trapped water is not sufficient for sucking in the lifter. In this case, the container is filled remain until the next emptying of the tilting container replaces the missing amount of water, and it is then but uncleaned, emptying at the same time as the older filling.

These deficiencies are avoided in the present device by the arrangement of the movable lifters d and d '. There are so large amounts of water available for the suction, about 8 to 10 percent of the filter basin contents, that the siphon is always in operation with certainty. In addition, because they are located outside the filter basin, these siphons are accessible at all times.

Claims (1)

Patent claim: Means for alternately filling and emptying of any size liquid tank, especially for waste water treatment plants, which containers filled by a moving means of a float Zuflußrinne alternately ¹ and? are emptied by siphons moved by this, characterized in that the movable siphons consisting of inverted U-shaped tubes are mounted outside the container in such a way that the end of one leg of each siphon is connected to the outflow point of the container and is flexible or movable, so that the other leg of each lifter is raised or lowered by the inflow channel moving up and down above or below the water level in the container and ^! thereby alternately ^{1 is made} to suck in. 1 sheet of drawings.