Electrode of ozonation plant and method of its manufacturing

IPC classes for russian patent Electrode of ozonation plant and method of its manufacturing (RU 2509180):

C25B11/00 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR

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/ 2246882

/ 2247081

/ 2247175

/ 2250914

/ 2251763

/ 2252275

/ 2252276

/ 2252921

FIELD: electricity.

SUBSTANCE: electrode of an ozonation plant represents a hollow sealed structure made of two identical membranes with a dielectric barrier on the outer surface; external and internal spacer rings that determine height of the electrode; a heat exchange attachment placed in the cavity of the electrode. Membranes made from metal or alloy with valve properties, have the shape of the disk with a central hole and flanging along the external and internal diameters, made for generation of electric discharge within the limits of active areas of the electrode. Thermal contact of internal surfaces of membranes with an attachment and spacer rings, and tightness of the electrode is provided by vacuum soldering. Preparation of the surface of parts for soldering and their protection against oxidation is carried out in environmentally pure solutions. Assembly and soldering of the structure is carried out in an assembly-soldering facility, made from metal with a lower temperature coefficient of linear expansion compared to materials of the electrode. In process of structure heating under temperature below the temperature of solder melting, thermal leveling is carried out on flat surfaces of the electrode due to directed thermal extension of spacer rings and attachment of the ribs, which helps to achieve equidistance of discharge gap of electrodes during their assembly. Simultaneously under appropriate temperatures they perform homogenisation of metal and vacuum etching of working surfaces of the electrode for subsequent creation of the dielectric barrier on them. The dielectric barrier is formed by electrochemical method in the form of an oxide film. After formation of the barrier layer on the working surfaces of the electrodes, their assembly is carried out jointly with a spacing gasket for creation of the specified discharge gap.

EFFECT: higher efficiency of cooling of its working surfaces during synthesis of ozone, nozzles for supply and drain of coolant, diametrically arranged on the outer ring.

2 cl, 1 dwg

The invention relates to the technical equipment intended for use in the production of ozone plants.

Known electrode in the form of a hollow air-tight structure of two identical membranes made of stainless steel connected to each other along the contour. In the junction between the membranes along the longitudinal axis are fitting for inlet and outlet of the coolant. In the cavity of the electrode placed distantsiruyutsa insert, which has a height equal to the distance between the membranes, providing a thermal contact in places of contact with the inner surface of the membrane and directed movement of the fluid in the cavity of the electrode. The electrode covered by a dielectric, for example, created by a high-temperature enameling (Patent RU 2278074 C2, publ. 20.06.2006,, bull. №17) [1].

The disadvantages of this design are as follows:

- Novoperedelkino technologies for enamelled coating thickness required to achieve consistently high dielectric characteristics of the barrier;

- the problematic ensure repeatable geometric parameters of flatness of the working surface of the electrodes and the estimated equidistantly discharge gap between them, especially with a small gap;

- significant inputs for the synthesis of ozone, due to the significant thickness of the bar the cluster cover, formed by enameling the working surface of the electrodes;

- insufficient cooling efficiency of the working surface of the electrodes, as distantsiruyutsa insert is not intended for this purpose;

- high metal electrodes;

- insufficient level of quality and reliability attach fittings in the joint area of the membrane.

The closest in technical essence and the achieved effect are the electrodes of the ozone generator, consisting of membranes in the form of sealed hollow thin-walled structures with fittings for inlet and outlet of the coolant. The membrane is made of a metal or alloy with the barrier properties, and on their surface created oxide layer of the same metal running from the side facing the discharge gap, the function of the dielectric barrier, and from the surface to be cooled - function anti-corrosion coating (Patent RF №2322386, SW 13/11, publ. 20.04.2008,, bull. №11) [2].

The use of metals with the barrier properties for the fabrication of membranes as proposed in this patent, allows, first, to replace the value stainless steel on a more economical structural material, and secondly, helps to reduce energy consumption for ozone synthesis, as opposed to the high-temperature enameling, allows you to create on the basis of the same metal is the llah more subtle, formed at normal temperature, the oxide barrier layer with high dielectric properties. The disadvantages of this design are:

- the importance of creating thin electrodes with repeatable characteristics and provide the estimated equidistantly discharge gap between them, especially with a small gap;

the absence of electrodes means of improving the efficiency of their cooling;

- insufficient level of quality and reliability attach fittings in the joint area of the membrane.

Task - create a budget in the manufacture and operation of the electrodes of the ozone generator for installations of a wide range of applications.

1 schematically shows the design of the electrodes of the ozone generator. The electrode is a hollow sealed design, consisting of two membranes 1 with a Central hole and flared special profile on the external and internal diameters, made for the purpose of forming an electric discharge within the active zone of the electrode and made of, for example, aluminum or its alloys; however, one of the two membranes may be in the form of a flat disc without flanging on the external and internal diameters; outer 2 and inner 3 spacer rings that define the height of the electrode; internal Palast the electrode thermal contact with the membrane placed the nozzle 4 with the developed heat exchange surface for efficient cooling of the working surfaces of the membranes; spacer ring and the nozzle have the same height; on the outer surface of the electrochemical membranes formed by the dielectric coating 5 with high thermal conductivity; for inlet and outlet of the coolant on the outer ring are fitting.

The analysis of the level of technology has allowed to establish that the applicant is not detected similar, characterized by signs, identical to all the essential features of the claimed invention, and therefore, it meets the criterion of "novelty."

Comparison of the essential features of the proposed and known solutions gives reason to believe that the proposed solution meets the criteria of "inventive step" and "industrial applicability".

Method of manufacturing electrode includes preparation of surfaces for soldering, Assembly and soldering structures, formation of a dielectric barrier coatings.

Surface preparation of parts for soldering and protection from oxidation during production, polerowanie produced in environmentally friendly electrolytes; Assembly design is carried out in Assembly and soldering fixture, made of a metal lower in comparison with the materials of the electrode temperature coefficient of linear expansion, with the aim of thermoreectance (alignment) of flat surfaces e is ectrode due to the directional thermal elongation of the edges of the nozzle at a temperature below the melting temperature of the solder, to achieve equidistantly discharge gap electrodes with their Assembly in the ozone generator, and the soldering is performed in vacuum, which provides thermal contact of the inner surfaces of the membranes with a nozzle and spacer rings, and the tightness of the structure; at the same time in the soldering process at appropriate temperatures produce homogenization of metal and vacuum etching working electrode surfaces for subsequent create for them a dielectric barrier, which is formed by electrochemical in the form of nanostructured oxide film.

Comparison of the essential features of the proposed and known solutions gives reason to believe that the proposed solution meets the criteria of "inventive step" and "industrial applicability".

1. The electrode is made of two membranes in the form of a hollow air-tight structure with fittings for inlet and outlet of fluid to the inner surfaces of the membranes with the formation of thermal contact attached distantsiruyutsa insert, membranes made of metallaire alloy with the barrier properties, and on their exterior surfaces created oxide layer of the same metal running from the side facing the discharge gap, the function of the dielectric barrier, wherein the electrode is a hollow sealed design, consisting of two membranes with a Central hole and a flared internal and external diameters, made for the formation of an electric discharge within the active zone of the electrode, or of two membranes, one of which may be in the form of a flat disc without flanging internal and external diameters of inner and outer spacer rings that define the height of the electrode in the inner cavity of the electrode posted nozzle with the developed heat exchange surface, which has thermal contact with the membrane, spacer ring and the nozzle are of the same height on the outer surface of the membrane formed of a dielectric coating with high thermal conductivity, for inlet and outlet of the coolant on the outer ring are fitting.

2. A method of manufacturing the electrode, including the preparation of surfaces for soldering and protect them from oxidation, which is produced in environmentally friendly electrolytes, Assembly design, which is implemented in Assembly and soldering fixture, made of metal with lower sravnenie the materials of the electrode temperature coefficient of linear expansion, the alignment of the flat surfaces of the electrode, which is due to the directional thermal elongation of the edges of the nozzle at a temperature below the melting temperature of solder, brazing, which is produced in the vacuum that provides thermal contact of the inner surfaces of the membranes with a nozzle and the spacer rings and the tightness of the structure, at the same time in the soldering process at the respective temperatures, there is a homogenization of the metal and the vacuum etching working electrode surfaces for subsequent create for them a dielectric barrier, which is formed by electrochemical in the form of the oxide film.