RU2263068C2 - Ozone plant - Google Patents

Abstract

FIELD: equipments used for purification and decontamination of water or air.

SUBSTANCE: the invention is pertaining to the field of equipments used for purification and decontamination of water or air. The ozone plant contains the dielectric parting layer, on one side of which the initiation electrode is located, and on the other side - a set of uniformly located corona-forming electrodes. On the side of the corona-forming electrodes the additional dielectric parting layer forming with the first parting layer a channel of the ozonized gas input and output. On the other side of the additional dielectric parting layer the additional initiation welding rod in such a manner that between surfaces of the dielectric parting layers and walls of the corona-forming electrodes there are the discharge gaps. Such a design allows to increase efficiency of production of ozone.

EFFECT: the invention allows to increase efficiency of production of ozone.

2 cl, 3 dwg

Description

The invention relates to techniques for producing ozone from oxygen or air in an electric discharge and can be used in installations for cleaning and disinfecting water or air.

Known ozonizer containing a dielectric barrier, on one side of which is one initiating electrode, and on the other two corona electrodes [1]. The disadvantage of this device is the low productivity of ozone. Here, the source of ozone is two surface corona discharges that are adjacent directly to the corona electrodes. The width of the corona discharge is 1-3 mm. Therefore, most of the surface of the dielectric barrier is not involved in ozone synthesis.

The closest in technical essence to the claimed device is a device selected as a prototype containing a dielectric barrier, on one side of which there is one initiating electrode, and on the other a set of uniformly located corona electrodes made in the form of metal strips of rectangular cross section, and from the corona electrodes there is a partition for the formation of the channel of entry and exit of ozonized gas [2]. Due to the large number of corona electrodes and the high density of their location on the dielectric barrier, the ozone synthesis productivity is high. In this device, a significant part of the surface of the dielectric barrier is involved in the synthesis of ozone.

However, the interaction of the corona electrodes and the initiating electrode does not occur over the entire inner surface of the ozonator channel, which affects the production of ozone.

The claimed invention solves the problem of creating an ozonizer with increased production capacity of ozone.

The technical result of the claimed invention is to increase the productivity of the ozonizer by increasing the active surface of the dielectric barrier involved in the process by mutual preionization of surface discharges.

The specified technical result is achieved by the fact that in the ozonizer containing a dielectric barrier, on one side of which there is an initiating electrode, and on the other, corona electrodes uniformly located between the barrier and the partition forming the channel for input and output of ozonized gas, the partition is made in the form of a dielectric barrier, on the other side of the corona electrodes, the side of which is located an additional initiating electrode so that between the surfaces of the dielectric barriers and the walls of the corona electrodes are formed of discharge gaps.

A further increase in the performance of the ozonizer is achieved by making corona electrodes hollow and oval in the form of strips of electrically conductive material.

In this design, the active surface area increases due to the appearance of an additional dielectric barrier. Moreover, the channel for input and output of ozonized gas remains unchanged. The active surface area also increases due to the use of oval-shaped corona electrodes. In the prototype [2], a part of the surface of the dielectric barrier is excluded from the core by ozone synthesis due to the width of the rectangular corona electrodes. In the proposed device, the oval corona electrode is in contact with the surface of the barrier over the smallest possible area defined by a straight line.

The implementation of the inventive design of the corona electrodes hollow allows you to directly cool the zone of synthesis and filling of ozone, which leads to higher productivity in ozone. The prototype [2] also has artificial cooling, but it is carried out by the initiating electrode through a dielectric barrier, the thermal conductivity of which is small. Therefore, cooling in the inventive device is more efficient.

In the inventive device, there are sliding discharges on opposite surfaces. Such surface discharges have a mutual influence on each other due to ultraviolet radiation. Free electrons are formed, which become the ancestors of electron avalanches, i.e. preionization occurs, and the discharges become more stable and productive in ozone synthesis. In this case, the active area on which ozone is synthesized has increased due to an additional barrier with an initiating electrode, with the same dimensions of the ozonizer.

Comparative analysis with the prototype shows that the inventive ozonizer has a new set of features. Thus, the inventive ozonizer meets the criteria of the invention of "novelty." A further increase in the efficiency of using the area of the barriers is due to the implementation of oval-shaped corona electrodes.

Figure 1 schematically shows an ozone generator as an example of a plate ozonizer, in figure 2 and figure 3 is a section aa in figure 1 (in figure 2 - with rectangular corona electrodes, in figure 3 - with hollow corona electrodes oval shape, as an example taken are the electrodes of round cross section as the most common and widely used in industry, given also the fact that round cross section is a special case of oval cross section).

The ozonizer contains a dielectric barrier 1 with a closely adjacent initiating electrode 2 and an additional barrier 3 with a second initiating electrode 4; between the barriers 1 and 2 there is a set of corona electrodes 5 (in figure 2 - rectangular in shape, in figure 3 - hollow round in shape), which with their walls and surfaces of the barriers 1 and 3 form discharge gaps 8. To limit the input and output channel of the ozonized gas from the sides are used liners 6.

In Fig. 1, a high voltage AC power supply 7, a high voltage output of a source 7 is connected to the initiating electrodes 2 and 4, and a grounded output to the corona electrodes 5.

The ozonizer works as follows. A predetermined flow of working gas enters the channel. Then it passes into the discharge gaps 8 formed by the surfaces of the barriers 1 and 3 and the walls of the corona electrodes 5. When a high voltage is applied from the power supply 7, a sliding discharge appears on the surface of the dielectric barriers 1 and 3 and ozone is synthesized. In the proposed device, sliding discharges take place on opposing surfaces. Due to preionization, the discharges are more stable and productive in ozone synthesis. Then the ozone-gas mixture leaves the channel and is fed to the ozone treatment facility. To further increase the performance of the ozonizer, coolant (in the simplest case, water from the water supply) is supplied to the hollow corona electrodes. Therefore, to the corona electrodes 5 is connected to the grounded output of the power source 7.

Oval electrodes allow more efficient use of the surface of dielectric barriers for ozone synthesis. In the extreme case, the oval-shaped corona electrodes can be placed directly one after another. With this arrangement of the corona electrodes due to the oval shape, gaps remain for the input and output of ozonated gas. In this case, the use of surfaces of dielectric barriers should be the most effective for these electrodes. However, due to the contact of the corona electrodes with each other, the radiation of opposite surface discharges completely overlaps. As a result, discharges become less productive in ozone synthesis. Thus, between the corona electrodes there should be a minimum gap at which a connection between opposite discharges due to short-wave radiation is ensured.

The device in figure 1, figure 2 and figure 3 is considered on the example of a plate ozonizer. Obviously, all the conclusions and advantages are also valid for tubular ozonizer.

LITERATURE

1. A.S. USSR No. 1562317, class From 01 to 13/10.

2. Masuda S., Akutsu K., Curoda H. et al. // Ceramic-Based Ozonizer using high frequency discharge, Proc. IEEE / IAS, 1985, Annual Conf., Toronto, Canada, P.1353.

Claims (2)

1. An ozonizer containing a dielectric barrier, on one side of which there is an initiating electrode, and on the other a set of evenly spaced corona electrodes, and on the side of the corona electrodes there is a partition that forms an ozonized gas input and output channel with a barrier, characterized in that the partition is made in the form of a dielectric barrier, on the other side of the corona electrodes, the side of which is located an additional initiating electrode so that between the surfaces of the dielectric barriers and the walls of the corona electrodes formed discharge gaps. 2. The ozonizer according to claim 1, characterized in that the corona electrodes are made hollow oval or in the form of strips of electrically conductive material.

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