Apparatus for sanitizing liquids with ultra-violet radiation and ozone
AssigneeThetford Corporation
InventorsAllan J. Coviello, Frederick E. Bernardin, Jr., Robert R. Rohrkemper
Life of this patent
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Abstract
Apparatus for contacting contaminated water with ultra-violet light to eliminate potentially harmful organisms as well as to provide air cooling necessary for efficient operation of the UV lamp and simultaneous production of ozone in the apparatus for secondary disinfection of the water, the water after treatment by the ultraviolet light being discharged into a water storage tank, and the irradiated air that contains the ozone being discharged into the tank into contact with the water for carrying out the secondary disinfection.
Claims16
Apparatus for sanitizing liquids comprising an elongated ultraviolet lamp, an inner duct surrounding the lamp and formed from a material which is transparent to the germicidal wavelengths of the ultraviolet light, an outer duct surrounding said inner duct, means to pass air through said inner duct so that said air is irradiated and ozone is formed, means to pass a liquid through said outer duct so that said liquid is irradiated, a tank, and means to pass the irradiated liquid and the irradiated air into said tank, the improvement comprising said inner duct including a zone wherein said air will flow at a predetermined relatively slow rate so that the air that is irradiated will produce a relatively high concentration of ozone, and air means to pass cooling air along at least a portion of the length of the lamp at a relatively high velocity to maintain the lamp at a temperature sufficient to achieve a relatively high radiation output.
Apparatus for sanitizing liquids comprising an elongated ultraviolet lamp, an inner duct surrounding the lamp and formed from a material which is transparent to the germicidal wave lengths of the ultraviolet light, an outer duct surrounding said inner duct, means to pass air through an axially extending zone of said inner duct at a predetermined relatively slow rate sufficient so that said air is irradiated and ozone is formed at a relatively high concentration, means to pass cooling air along at least a portion of the length of the lamp at a relatively high velocity sufficient to cool the lamp to a temperature near that which will enable maximum radiation output of the lamp to be achieved, and means to pass a liquid through said outer duct so that said liquid is irradiated.
Apparatus for irradiating air for use in sanitizing liquids comprising an elongated ultraviolet lamp, a duct surrounding the lamp, means to pass air through an axially extending zone of said duct at a predetermined relatively slow rate sufficient so that said air is irradiated and ozone is formed at a relatively high concentration, and means to pass cooling air along at least a portion of the length of the lamp at a relatively high velocity sufficient to cool the lamp to a temperature near that which will enable maximum radiation output of the lamp to be achieved.
Apparatus for sanitizing liquids comprising an elongated ultraviolet lamp, a duct surrounding the lamp, means to pass air through said duct so that said air is irradiated and ozone is formed, a tank for storage of liquid, and means to pass the irradiated air into said tank, the improvement comprising said duct including a zone wherein said air will flow at a predetermined relatively slow rate so that the air that is irradiated will produce a relatively high concentration of ozone, and air means to pass cooling air along at least a portion of the length of the lamp at a relatively high velocity to maintain the lamp at a temperature sufficient to achieve a relatively high radiation output.
Dependencies are inferred from the claim text.