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Quartz gas discharge lamp providing photocatalytic oxidation

A photocatalysis and oxidant technology, applied in the parts, chemistry, tube/lamp screen manufacturing of gas discharge lamps, etc., can solve the problems of short life, low power output, unsatisfactory use of fluorescent lamps, etc., and the proportion or degree is easy to control Effect

Inactive Publication Date: 2006-11-01
LIGHT SOURCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of fluorescent lamps is generally not ideal due to their low efficiency, relatively short lifetime due to UV phosphor degradation, and very low power output
Higher power, longer life, UV discharge lamps made of quartz are ideal; however, additional problems arise when using quartz

Method used

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  • Quartz gas discharge lamp providing photocatalytic oxidation
  • Quartz gas discharge lamp providing photocatalytic oxidation
  • Quartz gas discharge lamp providing photocatalytic oxidation

Examples

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Embodiment Construction

[0023] figure 1 is a schematic perspective view showing an embodiment of the present invention. This example shows a quartz gas discharge lamp 10 with a photocatalytic oxidation coating. The gas discharge lamp 10 has a quartz tube 12 provided with a spring case cover 14 . The spring case cover 14 is provided with contact pins 16 extending outward. A sleeve 20 is provided around the quartz tube 12 . The casing 20 is impregnated with titanium dioxide 18 . Sleeve 20 is preferably made of a material having a lower melting point than quartz tube 12 and titanium dioxide 18 . Sleeve 20 is preferably made of fluorinated ethylene propylene or other suitable fluorinated polymer (commonly available under the trade name Teflon). Fluorinated ethylene propylene sleeves are durable and able to withstand relatively harsh conditions. Fluorinated ethylene propylene sleeves are generally non-adhesive; however, titanium dioxide 18 can be impregnated or embedded into the sleeve when the slee...

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Abstract

A germicidal quartz lamp (10; 110; 210) producing ultraviolet radiation having a sleeve coated (20; 120; 220) with a titanium dioxide (18; 118A, 118B; 218). Titanium dioxide (18; 118A, 118B; 218) is impregnated or embedded into the sleeve (20; 120; 220) and mechanically held. Ultraviolet radiation having a wavelength of approximately 254 nm generated by the germicidal quartz lamp causes hydroxyl radicals to form on the titanium dioxide surface 18; 118A, 118B; 218). The hydroxyl radicals act as a powerful oxidizing agent that destroys pollutants. In one embodiment, different densities of the titanium dioxide (118A, 118B) coating are formed along the longitudinal length of the quartz lamp. A longitudinal portion (118C) of the quartz lamp may be free of any titanium dioxide coating permitting the ultraviolet radiation to pass therethrough creating a germicidal effect. The titanium dioxide may be heated to a temperature above the melting point of the sleeve to create the mechanical bond. The present invention is useful in the commercial food industry or for consumer use.

Description

technical field [0001] The present invention mainly relates to the treatment of pollutants with oxidants, in particular to a gas discharge quartz lamp, which produces photocatalytic oxidation through the reaction of ultraviolet rays and coatings. Background technique [0002] It is generally known that the treatment of pollutants, especially volatile organic compounds, can be carried out by photocatalytic oxidation or advanced oxidation techniques (AOT). Generally, the advanced oxidation technique includes irradiating anatase titanium dioxide or titanium oxide with ultraviolet light with a wavelength below 385nm. The hydroxyl radical formed in the irradiated titanium dioxide is a strong oxidizing agent that destroys pollutants. [0003] In many industrial applications, such as in the treatment of contaminated groundwater, quartz gas discharge lamps producing ultraviolet light with a wavelength mainly at 254 nm are used to illuminate plates coated with titanium oxide. Conta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L2/16A61L2/10A61L9/00A62C3/00A62D3/00B01D53/86F21V33/00H01J61/02H01J61/30
CPCA61L9/205H01J9/20H01J61/35
Inventor 帕特里克·沃德布赖恩·加万
Owner LIGHT SOURCES INC
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