Abstract:
A high frequency tubular ozonizer in which low voltage and high voltage electrodes are coaxially disposed metal pipes. The high voltage electrode is made detachable, and a portion of the electrode disposed in a discharge gap, is coated with a dielectric. The low voltage electrode is cooled directly with a coolant flow. The ozonizer has a reliable centering device, due to which the low voltage and high voltage electrodes can be easily arranged coaxially. Low and high voltage units, in the ozonizer, can be easily assembled or taken apart. To increase the operating capacity ozonizers can be either coupled by means of common pipelines to form multielement installations or they can be coupled in a common housing.
Abstract:
An ozoniser comprises a plurality of parallel electrode assemblies each consisting of concentric metal and dielectric tubes with a gap between them through which air or other oxygen containing gas is passed, the metal tube forming one electrode and a conductive liquid being provided on the surface of the dielectric remote from said gap to form the other electrode. The metal tube is cooled by a liquid flowing therethrough and the liquid of the liquid electrode is used to cool the dielectric tube. One of the electrodes may be earthed; the liquid or coolant for the other electrode is passed through long tubes of electrical insulating material to reduce the current through the liquid if the liquid is conductive. One electrode is earthed and the other is switched alternately to the positive and negative terminals of a high voltage D.C. supply using thyratrons controlled by a variable frequency trigger pulse generator.
Abstract:
A TUBULAR-SHAPED OZONIZER OF THE TYPE EQUIPPED WITH A COOLED INNER ELECTRODE AND A DIELECTRIC TUBE CONCENTRICALLY ARRANGED BETWEEN THE INNER ELECTRODE AND AN OUTER ELECTRODE. THE TUBULAR-SHAPED INNER AND OUTER ELECTRODES AND THE DIELECTRIC ELECTRODE ARE HELD AND MAINTAINED IN SPACED RELATIONSHIP FROM ONE ANOTHER BY ELECTRICALLY INSULATING CLOSURE CAP MEMBERS MOUNTED AT THEIR ENDS. ACCORDING TO THE INVENTION, THE SPACE BETWEEN THE INNER ELECTRODE AND THE OUTER ELECTRODE WHICH IS OF SUBSTANTIALLY CIRCULAR-SHAPED CROSS-SECTIONAL CONFIGURATION IS SUBDIVIDED BY THE DIELECTRIC TUBE INTO AN OUTER DISCHARGE
COMPARTMENT AND AN INNER COOLING COMPARTMENT. THE DISCHARGE COMPARTMENT AND COOLING COMPARTMENT COMMUNICATE BY MEANS OF SPACED HOLLOW COMPARTMENTS OF THE CLOSURE CAPS WITH CONDUIT CONNECTIONS PROVIDED AT SUCH CLOSURE CAPS FOR SUPPLYING THE DISCHARGE COMPARTMENT WITH AIR AND THE COOLING COMPARTMENT WITH A COOLING FLUID MEDIUM.
Abstract:
In an ozone generating system which performs intermittent operation, that is, an operation in an ozone generating operation period in which ozone is generated by discharging gas including oxygen at a discharge electrode part and an operation in an ozone generating operation standby period in which ozone is not generated by stopping discharge are alternately repeated, a gas circulating device which circulates gas in the ozone generating apparatus and removes at least nitric acid from the gas which is circulated is connected to the ozone generating apparatus.
Abstract:
An ozone generating apparatus includes a base container for holder water and a head assembly connected to the upper edge of the base container, the head assembly containing ozone generating cells, each having a dielectric tube and an electrode assembly coaxially disposed with the associated dielectric tube. The dielectric tubes and electrode assemblies are disposed and connected such that the tube and/or electrode assembly of each ozone generating cell can be accessed and replaced independently of all other ozone generating cells, and such that the possibility of cascade failure of all remaining ozone generating cells upon failure of a single cell is substantially eliminated.
Abstract:
An oxidation catalyst, an ozone injection nozzle, a urea-based fluid injection nozzle, and a selective reduction catalyst are arranged in an exhaust pipe of an engine in this order towards its outlet. An exhaust gas purifier includes an air flow sensor that detects an air intake amount of the engine, a NOx sensor that detects a NOx concentration in the exhaust pipe, and first and second temperature sensors that detect inlet temperatures of the catalysts. An ozone generation device to which the ozone injection nozzle is connected includes a compressor, a dryer that dries compressed air, a flow rate sensor that detects a flow rate of this air, an ozone generator that converts this air into ozone, and an ozone concentration sensor that detects a concentration of the ozone. A controller controls the compressor and the ozone generator based on respective detection outputs of the respective sensors.
Abstract:
A gas pipe integrated block includes a plurality of internal pipe paths. The plurality of internal pipe paths are connected to a nitrogen-free ozone generator in which a photocatalytic material for generating ozone is applied to a discharge surface, a controller (an MFC, a gas filter, and an APC), a raw material gas supply port, and an ozone gas output port. Thereby, a raw material gas input pipe path extending from the raw material gas supply port through the APC to the nitrogen-free ozone gas generator, and an ozone gas output pipe path extending from the nitrogen-free ozone generator through the gas filter and the MFC to the ozone gas output port, are formed in an integrated unit.