Abstract:
A method to disinfect a porous solid medium, such as soil, includes the steps of embedding a plurality of electrodes into the porous solid medium and applying a plurality of alternating current voltage pulses between the electrodes. The voltage pulses have a peak voltage of at least 10 kilovolts and are of an intensity and duration effective to generate a quantity of ozone. The ozone is produced in quantities sufficient to disinfect the porous solid medium.
Abstract:
An ozone generating apparatus including a discharge assembly having a common earth electrode (2) and high-voltage electrodes (3) disposed in opposition to each other with disk-like dielectric members (300) being interposed therebetween for generating electric discharge by applying a high voltage across the electrodes. A gas containing oxygen is supplied to discharge spaces (5) defined between the electrodes for generating ozone under the action of electric discharge. The discharge assembly includes a plurality of discharge cells (10a, 10b, 10c) constituted by disposing at least one of the dielectric member and the high-voltage electrode in a corresponding number relative to the earth electrode in common. A plurality of discharge assemblies are stacked and secured together to constitute a block A plurality of blocks are stacked and secured together to constitute a module. An ozone generating apparatus of a large capacity easy to effectuate assembling and maintenance is realized in a compact structure.
Abstract:
There is disclosed an ozone generator having enhanced ozone generating capabilities. A cryogenic stream of oxygen is irradiated with a high voltage electron beam that converts a portion of the oxygen into ozone. When the oxygen stream is liquid, conversion rates of up to 33% are achieved. Separation of ozone from oxygen is achieved by exploiting physical properties. In one embodiment, a gaseous mixture is at a temperature between 90 K and 161 K. A condenser coil condenses the ozone to a liquid. The ozone may be directed to a reaction chamber containing a surface increasing medium, such as porous inert beads, to remediate air borne biological and organic contaminants.
Abstract:
An ozone generator is set forth wherein the production of ozone is increased by the more efficient cooling of the generator electrodes and therefore the discharge gap where the ozone forms. The cooling is effected by the use of a boiling coolant fluid which has a high heat transfer capacity. Additionally the electrode structure is made more rigid for increased life in the presence of boiling cooling fluid. A method of ozone preparation is also set forth. Alternately cooling can be enhanced by the introduction of a gas into the coolant to enhance coolant turbulence without boiling the coolant.
Abstract:
An ozonizer which comprises a flat hollow metal grounded electrode and a discharge electrode plate spaced apart therefrom by a discharge space. The discharge electrode plate includes a flat hollow dielectric member, a high voltage electrode formed on the inner surface of the dielectric member, a spacer material provided within and held in a clamped state by the dielectric member, a lead conductor provided within and held in a clamped state by the spacer material and a connector connecting the lead conductor and high voltage electrode.
Abstract:
A cell or apparatus for treating a fluid by electron emission as the fluid is passed through a space between a dielectric layer located on a surface of a first electrode and a second electrode and as the electrodes are operated by an attached, appropriate circuit to cause electron emission within the space can be constructed so as to improve the efficiency of the cell or apparatus and so as to promote the amount of time which the dielectric layer may be used without breakdown. In constructing a cell or apparatus for this purpose cooling jackets are provided for circulating cooling fluids in contact with the surfaces of these electrodes remote from one another. In accordance with the disclosure the pressures of the fluids used in the cooling jackets and the fluid passing through the space of the apparatus or cell are regulated so as to maintain the electrical characteristics of the cell or apparatus substantially constant. This improves the efficiency of the circuit used to power the cell. In achieving such regulation the pressures are also preferably regulated so that there is substantially no deflection or movement of the dielectric layer. This minimizes the chances of such dielectric layer breaking down.
Abstract:
The invention provides a method and apparatus for generating large quantities of singlet oxygen and/or ozone at unexpectedly high efficiencies. An electron beam generated by a hollow cathode plasma discharge device (HCD) is spread by disclosed means over an electron-transmissive window past which is flowing an oxygen-containing atmosphere at a high velocity.
Abstract:
An improved ozone generator includes a cryogenically cooled reaction chamber in which gaseous oxygen well below the boiling point of ozone is subjected to a corona discharge and forms liquid ozone. The discharge portion of the reaction chamber holds a body of liquid ozone to block the flow of unreacted oxygen from the reaction chamber. A bed of glass particles within the body of liquid helps to suppress explosive decomposition of the ozone. A temperature gradient across the discharge portion of the reaction chamber permits the ozone to volatilize to a gas and exit the reaction chamber in a smooth, controllable manner.
Abstract:
Apparatus and method are disclosed for high efficiency electrical conversion of oxygen to ozone. An oxygen-containing gas is passed upwardly through a particulate dielectric contained between spaced electrode surfaces, whereby a fluidized bed is established consisting of a suspension of said dielectric particles in the streaming gas. Means are present for simultaneously maintaining a silent electrical discharge across the spaced electrodes and through the fluidized bed. The bed acts as a highly effective heat sink and also promotes the presence of high-frequency components in the current waves passing between electrodes, as a result of which increased electrical efficiency and increased ozone output is enabled in the conversion process.