Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or...
Reexamination Certificate
1998-08-11
2001-02-27
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With support and/or spacing structure for electrode and/or...
C313S035000, C313S017000, C313S036000
Reexamination Certificate
active
06194821
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a decomposition apparatus of an organic compound by emission of an ultraviolet (UV) light which is irradiated from an excimer lamp, a decomposition method thereof and an excimer lamp and an excimer emission apparatus which may suitable be used for the decomposition apparatus and the decomposition method.
An organic compound causing air pollution or water pollution can be decomposed or eliminated by an activated carbon adsorption treatment, an oxidation decomposition treatment, an activated sludge treatment, a bio-oxidation treatment or the like. Among the treatments described above, the activated carbon adsorption treatment may suitable be used for the elimination of the organic compound causing water pollution.
As the problem of the activated carbon adsorption treatment, a high-priced activated carbon is generally used and therefore the activated carbon makes it necessary to recycle; a handling of the activated carbon is not easy since the activated carbon is of powdery; an apparatus of the activated carbon adsorption treatment is of comparatively large scale; a recycling treatment of the activated carbon and maintenance of the apparatus need much labors and costs.
Recently, we are in dilemma how to solve the problem described above. Therefore, a method and an apparatus for decomposing easily the organic compound causing air pollution or water pollution at a low cost is requested.
SUMMARY OF THE INVENTION
The present invention was made in view of the above-mentioned circumstances. An object of the present invention is therefore to provide a decomposition apparatus by emission of a UV light which is irradiated from an excimer lamp, a decomposition method thereof and an excimer lamp and an excimer emission apparatus which may suitable be used for a decomposition apparatus and a decomposition method of an organic compound.
For the purpose of attainment of the above-mentioned object of the present invention, a decomposition apparatus for decomposing an organic compound fluid such as a gas of an organic compound, a liquid thereof, a gas containing an organic compound and a liquid containing an organic compound is decomposed. The decomposition apparatus comprises an excimer lamp emitting UV light for decomposing the organic compound, a decomposition container provided with an excimer lamp for decomposing the organic compound in the organic compound fluid. In the decomposition apparatus of the present invention, two or more decomposition container each having the excimer lamp may be jointed for flowing the fluid in the container to other container in order, and the organic compound in the fluid can be effectively decomposed. In case of the above-mentioned apparatus, it is preferable that the container is provided with a flow rate buffering material for slowing down a flow rate of the fluid. It is preferable that a contact part between the fluid and a catalyst gas for promoting decomposition of the organic compound is equipped to the decomposition container. The excimer lamp, which may suitable be used for the decomposition apparatus, comprises a discharging vessel made of a dielectric material with excellent permeability of a UV light, an inner tube equipped on the inside of the discharging vessel, a protect tube equipped on the outside of the discharging vessel, an outer electrode equipped in the position between the protect tube and the discharging vessel, an inner electrode equipped on the inside of the inner tube, a filling gas filled up in the discharging vessel and a power supply for applying a voltage between the outer electrode and the inner electrode.
A decomposition apparatus for decomposing an organic compound in second mode of the present invention comprises an excimer emission body equipped with an inner electrode, a metal container equipped to the outside of the excimer emission body for filling up at least one selected from a liquid of an organic compound and a liquid containing organic compound, and a power supply for applying a high frequency voltage between the inner electrode and the metal container, and a UV light irradiated from the excimer emission body to the liquid in the metal container allows to generate OH radical and O radical into the liquid, and the radical cuts some bond of the organic compound so that the organic compound in the liquid is decomposed easily. It is preferable that the excimer emission body comprises a discharging vessel made of a dielectric material with excellent permeability of a UV light, an inner tube equipped on the inside of the discharging vessel, an inner electrode equipped on the inside of the inner tube and a filling gas filled up in the discharging vessel. It is preferable that the power supply applies a high frequency voltage from 1 to 20 MHz to the metal container and the inner electrode.
The organic compound used may be selected from flon, dioxin (polychlorinated dibenzo-para-dioxin), PCB (polychlorinated biphenyl), trichloroethylene, tetrachloroethylene, dichloromethane, tetrachloromethane, 1,2-dichloroethane, 1,1-dichloroethane, cis-1,2-dichloroethane, 1,1,1-trichloroethane, 1,3-dichloropropene and the mixture thereof. It is preferable that the UV light of wavelength of 222 nm or below may suitable be used.
A decomposition method for decomposing an organic compound of the present invention may be used in the decomposition apparatus described above, and comprises steps of flowing a fluid which is selected from a gas of an organic compound, a liquid thereof, a gas containing an organic compound and a liquid containing an organic compound during the emission of a UV light which is irradiated from the excimer lamp, and decomposing the organic compound in fluid during its flowing. In this case, it is preferable that the fluid flows slowly in a flow rate buffering material during the emission of UV light. And, it is preferable that the fluid contacts a catalyst for promoting the decomposition of an organic compound during the emission of UV light. The organic compound used may be selected from flon, dioxin (polychlorinated dibenzo-para-dioxin), PCB (polychlorinated biphenyl), trichloroethylene, tetrachloroethylene, dichloromethane, tetrachloromethane, 1,2-dichloroethane, 1,1-dichloroethane, cis-1,2-dichloroethane, 1,1,1-trichloroethane, 1,3-dichloropropene and the mixture thereof. It is preferable that the UV light of wave length of 222 nm or below may suitable be used.
An excimer lamp, which may suitable be used for the decomposition apparatus and the decomposition method described above, comprises a discharging vessel made of a dielectric material with excellent permeability of UV light, an inner tube equipped on the inside of the discharging vessel, an outer electrode equipped on the outside of the discharging vessel, an inner electrode equipped on the inside of the inner tube and a filling gas filled up in the discharging vessel, and a UV light is preferably irradiated from the excimer lamp by which a high frequency voltage is applied between the outer electrode and the inner electrode from 1 to 20 MHz. In this case, it is preferable that the inner tube is cooled by a nitrogen gas flowed in the inner tube. It is preferable that d/D ratio, in which the “d” is an inner diameter of the inner tube and the “D” is an outer diameter of the inner electrode, is of from 1.1 to 3.0, and that L/D ratio, in which the “L” is a length of the inner electrode and the “D” is an outer diameter of the inner electrode, is of from 10 to below 30.
An U-shaped inner tube of at least one or above, as the inner tube, may be equipped on the inside of the discharging vessel.
An excimer emission apparatus comprises the excimer lamp described above, a power supply for applying a high frequency voltage from 1 to 20 MHz between the outer electrode and the inner electrode and a circulating cooling apparatus by the nitrogen gas to cool the inner tube. In this case, it is preferable that d/D ratio, in which the “d” is an inner diameter of the inner tube and the “D” is an outer diameter of the inn
Nixon & Vanderhye PC
Patel Nimeshkumar D.
Quark Systems Co., Ltd.
Williams Joseph
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