Patent EP-2165978-A1 (EP)
Inventor: POLAK WALTER
IPC: C02F9/00
Filed: 2009-09-17
Abstract: The water processing plant comprises an ozone generator (3) for generating ozone by ozonising fluid such as air or oxygen using a first UV-radiation for chemical disinfection of water, a UV-reactor (6) for physical disinfection of water using second UV-radiation, a pump (2), a venturi-injector (35) with a venturi-tube for guiding the water to be treated, and a venturi-injection tube for controlled injection of the fluid ozonised in the ozone-generator in the conducting water in flow direction before the UV-reactor. The water processing plant comprises a generator (3) for generating ozone by ozonising fluid such as air or oxygen using a first UV-radiation for chemical disinfection of water, a UV-reactor (6) for physical disinfection of water using second UV-radiation, a pump (2), a venturi-injector (35) with a venturi-tube for guiding the water to be treated, and a venturi-injection tube for controlled injection of the fluid ozonised in the ozone-generator in the conducting water in flow direction before the UV-reactor. The pump for pressing the water to be processed is formed through the venturi-tube of the venturi-injector. The ozone-generator comprises a reflector (33) for reflecting the produced UV-radiation with a corrugated surface for increasing the intensity of the reflected UV-radiation for ozonising the fluid. The UV-reactor is formed for producing the first UV-radiation for splitting of remaining ozone into hydroxyl-radicals for further chemical disinfection. The entry of the fluid ozonised in the ozone-generator in the water is controllable with the venturi-injector directly over the pumps or indirectly over a control valve equipped between the ozone-generator and the venturi-injection tube of the venturi-injector. The ozone-generator comprises a cylindrical shaped first container for guiding the fluids, and a first UV-radiation source for producing the first UV-radiation for ozonising the fluid in the first container. The first UV-radiation source is equipped in the area of the cylindrical longitudinal axis. The interior wall of the first container is formed as reflector with the corrugated surface for increasing the intensity of the reflecting UV-radiation in the area between the cylindrical longitudinal axis and interior wall of the first container. The ozone generator comprises a first UV-radiation source for producing the first UV-radiation with a wavelength of 185 nm, for ozonising the first fluid or second UV radiation with a wavelength of 254 nm, and for physical disinfection of the first fluid. The corrugated formation of the surface of the reflectors comprising the ozone-generator is increased to the factor of 1.5-2.5 for increasing the intensity of the reflected UV-radiation for ozonising the fluids and the corrugated surface of the reflectors is formed in the form of straight waves with corrugation troughs and corrugation peaks. The corrugated surface of the reflectors comprises polished aluminum for reflecting the UV-radiation. A mixing device is equipped with a reaction section of 2.30 m for mixing under chemical disinfection of the water to be treated with the ozonised fluid in flow direction between the venturi-injector and the UV-reactor. The mixing device is formed in the form of a reaction tube or reaction vessel. The UV-reactor is formed as thin layer UV-reactor with a cylindrical second container and with a second UV-radiation source in a quartz-immersion tube within the second container. The quartz-immersion tube and the second container are concentrically arranged with slight interval for guiding the water in a thin layer for improved physical disinfection. The second UV-radiation source equipped in the UV-reactor is equipped for producing the second UV-radiation with a wavelength of 254 nm, for physical disinfection and the first UV-radiation with a wavelength of 185 nm, for splitting the remaining ozone in hydroxy-radicals for simultaneous disinfection of the water to be processed. The UV-reactor comprises a titanium or titanium dioxide catalyst for strengthening the simultaneous chemical disinfection of water through additional transformation of the remaining ozone into hydrogen peroxide. A total control unit is equipped for producing the first UV-radiation with a wavelength of 185 nm, and the second UV-radiation with a wavelength of 253 nm, in the ozone-generator and in the UV-reactor. A first water storage for the provision of water to be processed and the storage of water to be processed is equipped with a second outlet, a second inlet and a third inlet. The first water storage is connected over the second outlet with the pump, and over the second inlet with the UV-reactor under formation of a first water circuit. The third inlet is intended for the supply of fresh water into the first water circuit. An independent claim is included for a method for processing of water.