Method and apparatus for treating water by means of ozone

Abstract

Abstract For the treatment of water with ozone, an ozone-containing oxygen stream is generated in an ozoniser (1) and contacted with the water to be treated in an ozone introduction device (2) which is under the same pressure conditions as the ozoniser (1). An exit gas stream, which above all contains undissolved oxygen and expelled nitrogen, is extracted from the ozone introduction device (2) via a gas line (5) and recirculated by means of a fan (8) via a drying device (6) to the ozoniser (1). In order to limit the nitrogen content in the recycled exit gas to a value favourable for the generation of ozone, a branch line (12) with a control valve (13) for controllable discharge of an exit gas part stream is connected to the gas line (5). The oxygen losses in the circulation system, caused by the discharge of exit gas via the branch line (12) and by the dissolution of ozone and oxygen in water, which takes place in the ozone introduction device (2), are compensated by feeding a controllable volumetric flow of fresh oxygen gas via a gas feed line (9) having a control device (10), connected to the gas line (5) upstream of the ozoniser (1).

Inventors

• 👤 Michael Dr. Berger
• 👤 Horst Helmut Dr. Lux

Bibliographic Details