Abstract:
The invention relates to a method for generating ozone from gases containing oxygen. The ozone is generated by silent electric discharge in an installation comprising at least two gaps, which are traversed by the gas, each of said gaps being formed between an electrode and a dielectric that separates each gap from an additional electrode. According to the invention, the restriction of the volumetric flow of the gas of at least one gap is controlled.
Abstract:
The invention relates to a method for generating ozone from gases containing oxygen. The ozone is generated by silent electric discharge in an installation comprising at least two gaps, which are traversed by the gas, each of said gaps being formed between an electrode and a dielectric that separates each gap from an additional electrode. According to the invention, the restriction of the volumetric flow of the gas of at least one gap is controlled.
Abstract:
Es wird ein Ozongenerator vorgeschlagen, der aus mehreren übereinander gestapelten plattenförmigen Ozonerzeugungselementen (8) besteht, die zumindest teilweise mit einem Prozesswasserstrom in Kontakt stehen und die jeweils wenigstens eine plattenförmige, elektrisch isolierte Innenelektrode und wenigstens eine ebenfalls plattenförmige Gegenelektrode aufweisen, zwischen welchen Raum für eine Gasentladung gegeben ist. Erfindungsgemäß sind die Ozonerzeugungselemente (8) senkrecht zur plattenförmigen Erstreckung beabstandet, sodass Prozesswasser an wesentlichen Flächenbereichen der plattenförmigen Ozon Erzeugungselemente (8) zwischen die Ozonerzeugungselemente (8) gelangen kann.
Abstract:
An ozone generating apparatus comprises at least one ozone generating unit which includes: two electrodes (2, 31) mutually opposed to generate a discharge in response to high voltage applied therebetween; at least one dielectric (4) interposed between the electrodes to provide insulation between the electrodes; and a gas supply mechanism to supply an oxygen-containing gas between the electrodes so as to generate ozone by the discharge. An elastic body (100) is mounted onto a back face of one of the electrodes (31) of the ozone generating unit to cover substantially the entire back face of the electrode.
Abstract:
An ozone generating apparatus comprises at least one ozone generating unit which includes:
two electrodes (2, 31) mutually opposed to generate a discharge in response to high voltage applied therebetween; at least one dielectric (4) interposed between the electrodes to provide insulation between the electrodes; and a gas supply mechanism to supply an oxygen-containing gas between the electrodes so as to generate ozone by the discharge. An elastic body (100) is mounted onto a back face of one of the electrodes (31) of the ozone generating unit to cover substantially the entire back face of the electrode.
Abstract:
There is provided a highly efficient and compact ozone generating apparatus in which a very short air gap (5) of about 0.2 mm is formed at high accuracy. Non-discharge portions are dispersed and disposed to cover an entire discharge space, or a spacer (61) is provided to form the non-discharge portion. Further, an elastic body is mounted on a back face of an electrode, thereby enhancing an air gap accuracy of the discharge space.
Abstract:
A process for conditioning an ozone gas recycle stream in an ozone pulp bleaching process, wherein the level of carbon dioxide in the recycle stream is controlled to allow full capacity operation of the ozone generator. Carbon dioxide concentration is identified over the relevant operational ranges and maximum concentration is identified for full capacity/optimum efficiency operation. Specific methods are described for controlling carbon dioxide concentration including purging a portion of the recycle stream, counter-current scrubbing of the recycle stream with an alkaline solution and passing the recycle stream through an adsorbent material. Contaminants entering the system also may be reduced by directing the purged recycle stream, which is relatively oxygen rich, into the dewatering press where pulp consistency is increased. In this manner nitrogen surrounding the pulp is displaced by oxygen and thus, does not enter the bleaching/ozone system with the pulp.
Abstract:
The plant comprises an ozoner (1) in the first region (1') of which ozone is formed and dispersed in the fluid by a gas supply member (3). The two-phase mixture thus formed flows through the second region (1'') of the ozoner up to a phase separation element (13). Owing to the arrangement of the gas supply member on the fluid inlet side, the second region (1'') forms a flowing zone defined by the two-phase mixture. The most important possible ozone supply in the fluid is thereby obtained. Such plants are particularly used to sterilize drinkable water and bath water.
Abstract:
L'installation comporte un ozoneur (1) dans la première région (1') duquel est formé de l'ozone qui est dispersé dans le fluide par un organe d'alimentation de gaz (3). Le mélange diphasique ainsi formé s'écoule à travers la seconde région (1'') de l'ozoneur jusqu'à un élément de séparation des phases (13). Grâce à la disposition de l'organe d'alimentation de gaz sur le côté d'entrée du fluide, la seconde région (1'') forme une zone d'écoulement définie pour le mélange diphasique. Il en résulte une alimentation d'ozone dans le fluide la plus importante possible. De telles installations sont utilisées en particulier pour stériliser de l'eau potable et de l'eau de bain.