Method of introducing oxygen into a liquid to be clarified and device for carrying the method into effect

Claim 1

A device for introducing oxygen into a liquid, comprising circulating means arranged in an activation tank for producing at least one substantially toroidal liquid flow circulating in the lower part of the activation tank and at least one such flow in the upper part of the said tank and supply means for supplying oxygen or an oxygen mixture to the individual toroidal liquid flow, comprising a ventilation gyroscope having outlet apertures for producing the upper substantially toroidal liquid flow and for introducing oxygen into the said flow, which ventilation gyroscope is arranged in the activation tank in such a manner that during operation of the device the outlet apertures of the ventilation gyro are located above the level of the liquid, wherein in the lower part of the activation tank there is arranged a liquid conveying means for producing the lower toroidal flow circuit, wherein the ventilation gyro is connected by way of a vertically descending shaft to said liquid conveying means, wherein a rotationally symmetrical flow deflecting part is arranged on the shaft at the level of the plane of separation between two flow circuits to be produced and is designed in such a manner that the upper flow circuit is deflected by the said part towards the shaft in the upwards direction and the lower flow circuit is deflected by the said part towards the shaft in the downward direction.

Claim 2

A device for introducing oxygen into a liquid, comprising circulating means arranged in an activation tank for producing at least one substantially toroidal liquid flow circulating in the lower part of the activation tank and at least one such flow in the upper part of the said tank and supply means for supplying oxygen or an oxygen mixture to the individual toroidal liquid flow, comprising a ventilation gyroscope having outlet apertures for producing the upper substantially toroidal liquid flow and for introducing oxygen into the said flow, which ventilation gyroscope is arranged in the activation tank in such a manner that during operation of the device the outlet apertures of the ventilation gyro are located above the level of the liquid, wherein in the lower part of the activation tank there is arranged a liquid conveying means for producing the lower toroidal flow circuit, wherein the ventilation gyro is connected by way of a vertically descending shaft to said liquid conveying means, wherein a rotationally symmetrical flow deflecting part is arranged on the shaft at the level of the plane of separation between two flow circuits to be produced and is designed in such a manner that the upper flow circuit is deflected by the said part towards the shaft in the upwards direction and the lower flow circuit is deflected by the said part towards the shaft in the downward direction.

Claim 3

A device for introducing oxygen into a liquid, comprising circulating means arranged in an activation tank for producing at least one substantially toroidal liquid flow circulating in the lower part of the activation tank and at least one such flow in the upper part of the activation tank and supply means for supplying oxygen or an oxygen mixture to the individual toroidal liquid flow, comprising a ventilation gyroscope having outlet apertures for producing the upper substantially toroidal liquid flow and for introducing oxygen into the said flow, which gyroscope is arranged in the activation tank in such a manner that during operation of the device the outlet apertures of the ventilation gyroscope are located above the level of the liquid, wherein in the lower part of the activation tank, there is arranged a liquid conveying means for producing the lower toroidal flow circuit, wherein the ventilation gyroscope is situated on a common vertical descending axis with said liquid conveying means, wherein a rotationally symmetrical flow deflecting part is arranged on said common axis at the level of the plane of separation between two flow circuits to be produced and is designed in such a manner that the upper flow circuit is deflected by the said part towards the said axis in the upwards direction and the lower flow circuit is deflected by the said part towards the said axis in the downward direction.

Claim 4

A device for introducing oxygen into a liquid, comprising circulating means arranged in an activation tank for producing at least one substantially toroidal liquid flow circulating in the lower part of the activation tank and at least one such flow in the upper part of the activation tank and supply means for supplying oxygen or an oxygen mixture to the individual toroidal liquid flow, comprising a ventilation gyroscope having outlet apertures for producing the upper substantially toroidal liquid flow and for introducing oxygen into the said flow, which gyroscope is arranged in the activation tank in such a manner that during operation of the device the outlet apertures of the ventilation gyroscope are located above the level of the liquid, wherein in the lower part of the activation tank, there is arranged a liquid conveying means for producing the lower toroidal flow circuit, wherein the ventilation gyroscope is situated on a common vertical descending axis with said liquid conveying means, wherein a rotationally symmetrical flow deflecting part is arranged on said common axis at the level of the plane of separation between two flow circuits to be produced and is designed in such a manner that the upper flow circuit is deflected by the said part towards the said axis in the upwards direction and the lower flow circuit is deflected by the said part towards the said axis in the downward direction.

Claim 5

A method of introducing oxygen into a liquid located in an activation tank of a clarification plant, comprising the steps of forming at least one substantially toroidal liquid flow circulating in the lower part of the activation tank, forming at least one substantially toroidal liquid flow circulating in the upper part of the activation tank with a ventilation gyroscope projecting from the liquid and which ventilation gyroscope also serves as a surface ventilator, said toroidal liquid flows being arranged to lie above each other and to directly adjoin each other for providing a continuous exchange of the liquid between each other and having a substantially vertical common axis of symmetry, diverting the liquid flows into the desired position by means of flow deflecting means arranged in the activation tank, supplying oxygen or an oxygen mixture to at least one point of the lower toroidal Flow circuit be means of a feed pipe and supplying oxygen or an oxygen mixture to at least one point in the upper toroidal liquid flow circuit.

Claim 6

A method of introducing oxygen into a liquid located in an activation tank of a clarification plant, comprising the steps of forming at least one substantially toroidal liquid flow circulating in the lower part of the activation tank, forming at least one substantially toroidal liquid flow circulating in the upper part of the activation tank with a ventilation gyroscope projecting from the liquid and which ventilation gyroscope also serves as a surface ventilator, said toroidal liquid flows being arranged to lie above each other and to directly adjoin each other for providing a continuous exchange of the liquid between each other and having a substantially vertical common axis of symmetry, diverting the liquid flows into the desired position by means of flow deflecting means arranged in the activation tank, supplying oxygen or an oxygen mixture to at least one point of the lower toroidal Flow circuit be means of a feed pipe and supplying oxygen or an oxygen mixture to at least one point in the upper toroidal liquid flow circuit.

Claim 7

A device for introducing oxygen into a liquid comprising, in combination, a ventilation gyroscope having outward apertures for producing at least one upper substantially toroidal flow circuit and for introducing oxygen into said flow, said ventilation gyroscope being arranged in the activation tank whereby the outward apertures are located above the level of the liquid, lower flow circuit means for producing a lower toroidal flow circuit in the lower part of the activation tank, said lower and upper toroidal flow circuits being arranged one above the other for providing a continuous exchange of the liquids between each other, flow deflecting means arranged in the interior of the activation tank for aiding in the production of said upper and lower toroidal flow circuits, at least one feed pipe for conveying activated sludge arriving from a reclarification tank into the lower toroidal flow circuit, and supply means for supplying oxygen or an oxygen mixture to said toroidal flow circuits.

Claim 8

A device for introducing oxygen into a liquid comprising, in combination, a ventilation gyroscope having outward apertures for producing at least one upper substantially toroidal flow circuit and for introducing oxygen into said flow, said ventilation gyroscope being arranged in the activation tank whereby the outward apertures are located above the level of the liquid, lower flow circuit means for producing a lower toroidal flow circuit in the lower part of the activation tank, said lower and upper toroidal flow circuits being arranged one above the other for providing a continuous exchange of the liquids between each other, flow deflecting means arranged in the interior of the activation tank for aiding in the production of said upper and lower toroidal flow circuits, at least one feed pipe for conveying activated sludge arriving from a reclarification tank into the lower toroidal flow circuit, and supply means for supplying oxygen or an oxygen mixture to said toroidal flow circuits.