Abstract:
Ozone is produced in that oxygene is subjected to a high frequency alternating current with high voltage over a dielectricum. Oxygen is admitted to a narrow space between two plates (2) of aluminum oxide, and the current is applied to an electrode net (3) in the space, whereas the opposite sides of the plates are earthed and cooled.
Abstract:
Disclosed is an improved electrode structure for ozone generation. The structure includes a dielectric (10), such as aluminum oxide in the form of a thin alumina ceramic plate, mounted between and separated from two parallel and closely spaced planar metal electrodes (14, 15) of a chemically stable metal such as titanium. The structure is designed so that the dielectric plate (10) can be readily inserted into or removed from an insulating frame (11) holding the metal plates. The insulating frame material is suitable for high voltage applications and is designed so that the metal plates (14, 15) are held parallel to one another at a predetermined small spacing, and also contains suitable guides (18, 20) for the dielectric plate (10) so that it can be easily inserted between the metal plates and held in position. The dielectric plate is larger in outer dimensions than the opposing metal plates such that this distance prevents the possibility of electric arcing between the metal plates, and the insulating frame prevents arcing between the metal plates and any grounded support structure. As the dielectric plate can be easily inserted into or removed from the frame with a simple sliding action, the design enables a handle and a cleaning pad to be attached to the dielectric plate such that dust and particulate contamination can be readily removed from the gaps between the metal plates and the dielectric plate. This permits easy cleaning of the ozone generator without dismantling the structure.
Abstract:
This invention concerns a SiO2, SiNx protection film formed by a CVD or PVD gas phase glowing method capable of preventing melting of the matrix ingredients at the surface of a dielectric material in electric discharge of an ozone generator and it relates to a dielectric material used for an ozone generator capable of overcoming the problems for the abrasion of electrode and dielectric material or melting of ions or molecules during electric discharge, as well as a method of forming a protection film therefor based on the finding that an SiO2 film or SiNx film can be formed easily on a surface of a predetermined electric material or, further, on a surface of electrode by processing a specific reaction gas, for example, comprising a crude gas such as SiH4, SiCl4, N2, NH3 or TEOS or further incorporated with an inert gas or like by means of an atmospheric CVD process such as CVD or heat CVD and, in particular, on the finding that the protection film can be disposed directly to the surface of the dielectric material and the electrode in an ozone generator after the completion of assembling.
Abstract:
There is provided a generator (1) for forming ozone from air. The generator is adapted to be connected to a power source and comprises a unitary grid assembly (30) which includes a first dielectric plate (32), a second dielectric plate (34) spaced apart from the first dielectric plate, a wire mesh electrode (42) located between the first and the second dielectric plates, a third dielectric plate (36) spaced from the second dielectric plate, a cathode plate (44) located between the second and the third dielectric plates, and a pair of dielectric spacers (38, 40) located between the third dielectric plate and the cathode plate. The second dielectric plate, the pair of spacers and the cathode define a space for the passage of air and the collection of ozone formed from the air. The generator also comprises a blower (10) positioned spaced from but adjacent the grid assembly, for moving the air through the space (50).
Abstract:
A pulsed corona discharge reactor (5) for solution treatment comprises a number of reactor plates (7) stacked one on the other such that there is a distance (D) between successive reactor plates (7). The reactor plate (7) comprises at least one first electrode (9) and at least one second electrode (10). The at least one first electrode (9) comprises at least one flow opening(16)for a flow of the solution and is arranged to be connected to a voltage pulse generator (2) arranged to provide repetitive power pulses. The at least one second electrode (10) is arranged to be earthed. The reactor plates (7) are stacked one on the other such that the at least one first electrode (9) and the at least one second electrode (10) in the successive reactor plates (7) are opposite to one another. Also a pulsed corona discharge system (1) for solution treatment and a method for solution treatment with pulsed corona discharges are provided.
Abstract:
Apparatus for the production of a product gas (eg hydrogen and ozone) comprises: a supply of reactant gas (eg oxygen and steam) (14); a pair of electrodes (24) with a space between them of less than 1 mm (28); a conduit to lead the reactant gas from the source through the space between the electrodes; a power source (26) to apply a voltage across the electrodes to dissociate the reactant gas and ultimately permit formation of product gas; and a conduit (40) to supply the product gas to an outlet. A sterilisation unit for water treatment employs such apparatus and includes a fluidic oscillator to oscillate the flow of oxygen and/or ozone, and wherein said outlet comprises a plurality of orifices (42) to be submerged in said water and for the purpose of forming micro bubbles of ozone. An analyser for detecting large organic molecules in eg air can employ the ozone generator to breakdown the large molecule into simpler and easier- to- detect-and- identify molecules.
Abstract:
A method and an apparatus for efficiently and stably producing ozone-water of an intermediate to high temperature by using a conductive diamond as an electrode material are provided. Purified water or tap water of an intermediate to high temperature is supplied from a temperature control unit (30) to an anode chamber (13) provided with an anode (3) in an electrolytic cell (1) wherein the anode (3) and a cathode (5) are so arranged as to sandwich a solid polymer film (7). When a DC current is conducted between the anode (3) and the cathode (5), ozone-water of an intermediate to high temperature is discharged from the outlet port (13b) of the anode chamber (13). When a conductive diamond having a porous or a mesh structure is employed as the anode (3) in such an ozone water production apparatus, degradation in ozone production capacity is suppressed even in a high temperature range and ozone water of an intermediate to high temperature can be produced efficiently and stably.