Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – With means applying electromagnetic wave energy or...
Reexamination Certificate
1999-08-20
2001-09-04
Gorgos, Kathryn (Department: 1741)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
With means applying electromagnetic wave energy or...
Reexamination Certificate
active
06284205
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an ozonizing unit that generates ozone by subjecting a gas, such as oxygen gas or air, to surface discharge (creeping discharge), an ozone generator and an ozone-processing system.
2. Description of the Related Art
Ozone has been used for the sterilization, deodorization and bleaching of service water and sewage, for the deodorization and bleaching of industrial waste water, for the bleaching of pulp and for the sterilization of medical implements. A known surface discharge ozone generator is provided with a plurality of electrodes arranged on the surface of a dielectric substrate, and generates ozone from an ozone source gas by subjecting the ozone source gas to silent discharges between the plurality of electrodes.
The conventional ozone generator generates ozone by generating silent discharges between the plurality of electrodes. A large ozone generator provided with electrodes arranged at a small interval are desired to generate ozone of high concentration. However, it is difficult to space the large electrodes having a large area uniformly at a small interval.
The electrodes of the surface discharge ozone generator arranged on the surface of the dielectric substrate deteriorate due to sputtering and the life thereof is not long enough.
The present invention has been made in view of the foregoing problems and it is therefore an object of the present invention to provide an ozonizing unit capable of generating high-concentration ozone with high reliability and having a large ozone generating capacity and a long life, an ozone generator, and an ozone-processing system.
SUMMARY OF THE INVENTION
According to the present invention, an ozonizing unit has an electrode plate having a dielectric substrate and a pair of electrodes formed on a first surface of the dielectric substrate. A dielectric layer is formed on the first surface of the dielectric substrate so as to cover the pair of electrodes.
Since the pair of electrodes are covered with the dielectric layer, the pair of electrodes are not deteriorated by sputtering.
According to the present invention, an ozonizing unit comprises an electrode plate having a dielectric substrate and at least a pair of electrodes formed on a first surface of the dielectric substrate at a predetermined interval and serving as surface discharge electrodes; a gas guide spaced from a surface of the electrode plate by spacers so as to define a discharge space extending over the electrodes of the electrode plate into which a source gas is supplied; and a cooling structure having a cooling water chamber and disposed on a surface of the electrode plate on the opposite side of the surface of the same facing the gas guide; in which a holding plate is disposed through an elastic member on a surface of the gas guide on the opposite side of the electrode plate, and the cooling structure and the holding plate are fastened together by fastening means at positions thereon outside the electrode plate and the gas guide.
In this ozonizing unit, the electrode plate, the spacers and the gas guide can indirectly be held and fixed, and the ozonizing unit integrally provided with the cooling structure and the holding plate can easily be constructed.
According to the present invention, an ozonizing unit comprises a cooling structure having a cooling water chamber; a pair of electrode plates disposed on the opposite surfaces of the cooling structure, respectively, and each having a dielectric substrate and at least a pair of electrodes serving as surface discharge electrodes and arranged at a predetermined interval on a first surface of the dielectric substrate; gas guides each disposed through spacers on the surface of the electrode plate provided with the electrodes so as to define a discharge space; and holding plates each disposed through an elastic member placed on a surface of the gas guide on the opposite side of the electrode plate.
The discharge spaces can effectively be disposed relative to the cooling structure, and the ozonizing unit can be constructed in an efficient and compact construction.
In the ozonizing unit according to the present invention, the pair of holding plates are fastened together by fastening means at positions thereon outside the cooling structure, the pair of gas guides and the pair of electrode plates.
In the ozonizing unit, the electrode plates, the spacers and the gas guides can indirectly be held and fixed, and the ozonizing unit integrally provided with the cooling structure and the holding plates can simply and easily be constructed.
In the ozonizing unit according to the present invention, the pair of holding plates and the cooling structure are fastened together by fastening means at positions thereon outside the pair of gas guides and the pair of electrode plates.
Thus, the electrode plates, the spacers and the gas guides can indirectly be held and fixed, and the ozonizing unit integrally provided with the cooling structure and the holding plates can simply and easily be constructed.
The ozonizing unit may have a cylindrical ozone discharging space formed in a central part of an assembly of the cooling structure, the electrode plates, the gas guides and the holding plates, the source gas may be supplied through all sides of the ozonizing unit into the discharge spaces, and ozone generated by surface discharge may be discharged into the ozone discharging space.
In this ozonizing unit, any parts for forming a source gas passage for supplying the source gas are not necessary, and ozone can easily and simply be discharged and collected.
Spaces between the gas guides and the corresponding holding plates formed near the cylindrical ozone discharging space may be sealed in a gas-tight fashion by sealing members.
When those spaces are thus sealed, ozone is unable to leak from the ozonizing unit and can easily be collected from the ozone discharging space formed in the central part of the ozonizing unit.
The source gas may be supplied through one side of the discharge space of the ozonizing unit, an ozone discharging space having the shape of a quadrangular prism and an ozone discharging opening may be formed in one end part of the holding plate opposite a source gas supply side, the source gas may be supplied through one side of the ozonizing unit, and ozone generated by surface discharge may be discharged into the ozone discharging space.
In the ozonizing unit, any parts for forming a source gas supply passage for supplying the source gas are not necessary and an ozone discharging and collecting structure can easily and simply be constructed. The source gas can easily be supplied so as to flow at a constant flow rate through the discharge space and surface discharge can be stabilized.
A plurality of ozonizing units like that integrally provided with the holding plates may be stacked, a plurality of stud bolts may be extended through the plurality of ozonizing units, and the opposite ends of the stacked ozonizing units may be fastened together by fastening means to build an ozone generator.
An ozone generator having a large ozone generating capacity can easily be constructed by thus stacking the plurality of ozonizing units, and ozone can easily be collected and the ozone generator has a simple construction because the ozone discharging spaces of the ozonizing units are connected continuously to form a cylindrical common ozone passage. The ozonizing units may be standardized.
When the ozone generated by supplying a source gas into the discharge spaces of the integrally stacked ozonizing units and exposing the same to surface discharge in the discharge spaces of the ozonizing units is discharged into the cylindrical common ozone passage, the dimensional relation expressed by the following expressions may be satisfied.
A
1
=n×&pgr;×D×G
A
2
=&pgr;×(
D/
2)
2
&agr;=(
A
2
/A
1
)≧2
where n is the number of the discharge spaces, G is the width of the discharge spaces, D is the diameter of the cylindrical
Ando Sueo
Inaba Michihiko
Kawaguchi Shigeru
Kobayashi Shinji
Murata Takaaki
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Gorgos Kathryn
Kabushiki Kaisha Toshiba
Tran Thao
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