RU2450978C2 - Apparatus for treating liquids with uv radiation - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: apparatus relates to disinfection and sterilisation of liquids using ultraviolet (UV) radiation in the bactericidal range, obtained using light-emitting diode (LED) radiators and can be used in closed multi-lamp systems. The apparatus has, in at least one copy, a UV source with power supply terminals placed coaxially with respect to one of the foci of the housing, which is in form of an elliptic cylinder with an inner surface which reflects in the UV range. A UV-transmitting tube, through which the liquid to undergo treatment moves, is placed coaxially relative the second foci of the housing. The UV source is in form of a UV LED mat which is rolled up into a cylinder with LEDs lying on the outer side of the cylinder which is placed at the other focus of the elliptic housing.

EFFECT: high efficiency of water treatment.

2 dwg

Description

The device relates to the field of disinfection and sterilization of liquids using ultraviolet (UV) radiation of the bactericidal range obtained by LED emitters, and can be used in closed multi-tube systems.

Currently, it is urgent to use energy-saving technologies, including by switching from incandescent lamps to semiconductor sources - LEDs. At present, water treatment systems are equipped with standard mercury germicidal low-pressure lamps (DB-75 type), the improvement of designs of which is aimed at solving such problems as reducing the number of UV lamps, increasing the efficiency of their radiation using the organization of the optimal hydrodynamic flow structure and reducing pressure loss.

In known devices of this type of lamp are arranged perpendicular to the direction of fluid flow (transverse flow) or along (longitudinal flow). For transverse flow, the entire arc length of the lamp radiation is optimally used. An example of a device with a transverse arrangement is the patent of the Russian Federation 2058068 [1]. This design is designed for a number of lamps of more than 200. A well-known technical solution allows to increase the efficiency of water treatment due to the appropriate organization of the flow passing through the irradiation zone, however, it has significant pressure losses.

With longitudinal flow around, the pressure loss can be significantly reduced, however, with the indicated water flow rates and the number of lamps over 16, the diameter of the inlet and outlet nozzles occupies a disproportionately large part of the installation casing. An example of a device with a longitudinal arrangement is described in the patent [2], containing a cylindrical body having coaxially located inlet and outlet pipes. In the irradiation zone located between the pipes, parallel to the generatrix of the housing installed 16 UV lamps.

The disadvantage of using the above UV radiation sources without additional devices - light energy concentrators is the inefficiency of the use of emitters, when the radiation intensity in these structures also decreases inversely with the square of the distance from them. Considering that the power of LEDs is less than that of UV lamps, the solution to the problem of reducing the energy intensity of the disinfection procedure by replacing the lamps with LEDs without concentrators seems problematic.

A device for sterilizing liquids [3], containing a source of ultraviolet radiation, made in the form of a longitudinally cylindrical emitter and a reflector made in the form of two sections, the first of which is a flat reflective element, and the second is an elliptical half-cylinder, and in the focal zone of the latter placed a source of ultraviolet radiation and a photoreactor. The specified elliptical half-cylinder, which is the second section of the reflector, is formed as a result of the cross-section of the original elliptical cylinder with a longitudinal plane oriented normal to the plane in which the focal zones of the original elliptical cylinder are located, the flat reflecting element being placed in the said longitudinal section plane, which is symmetrically positioned relative to the focal zones of the original elliptical cylinder.

The disadvantage of this device is the use of a spiral as a water conduit, which "slows down" the flow of fluid passing through it and creates additional resistance to flow. Despite the fact that ultraviolet radiation irradiates both the internal and external surfaces of the spiral coils, i.e. It’s as if fully used for sterilizing a liquid, the intensity of the external illumination of the spiral with the fluid flowing through it is an order of magnitude lower than the illumination from the inside, i.e. There is a loss of light energy, which leads to a loss in device performance.

The aim of the invention is to increase the efficiency of water treatment.

A device [4] is known, consisting of light emitting diodes placed on the inner surface of a paraboloid, which allows to obtain an increased radiation density in the focal plane.

A device [5], taken as a prototype, is known, which is a matrix of LEDs made in the form of an elastic mat, which is used by wrapping parts of the human body in it.

The technical result achieved by the implementation of the claimed invention consists in the fact that the semiconductor elements are included in the composition of the device as semiconductor elements — LEDs assembled in the form of a matrix, emitting in the UV range, placed inside the body in the focal zone, and the body is shaped according to at least one elliptical cylinder.

1 and 2 schematically depict the proposed device.

Figure 1:

- longitudinal section - a);

- cross section - b);

figure 2 - multi-housing design of the device.

A device for treating liquids with UV radiation contains a source of ultraviolet radiation, made in the form of a LED mat 1 rolled up into a cylinder, with LEDs located on the outside of the cylinder and mounted in the first focus 2 of the housing 3, made in the form of an elliptical cylinder with a UV-reflecting range the inner surface and the side caps-holders 4 and with power terminals 5. Coaxial to the second focus 6 of the housing 3 is a UV-transmitting tube 7, through which the liquid to be irradiated flows spine 8. The operation is based on the geometric property of elliptic body having two foci, and the power source when placed in one focus, it is focused at the second focus.

The device operates as follows.

In the mode of use of the device, which involves irradiating the liquid 8, the emitting element 1 is installed coaxially with the first focus 2 of the housing 3. With this configuration of the reflector, the inner surface of the housing 3, the radiation flux of the UV source 1 located in the focal zone of the housing 3 irradiates the inner surface of the housing after reflection from it returns to the second focal zone 6 of the housing 3, forming in it a light bundle of increased intensity.

In the case of combining several buildings in one case (figure 2), they are combined with the focus area in which the pipe is placed with the flowing fluid.

Information sources

1. Butin V.M., Drozhzhin V.V., Zhukov V.K., Kostyuchenko S.V., Kudryavtsev V.N., Kudryavtsev N.N., Kurkin G.A., Filyugin I.V., Yakimenko A.V. Liquid disinfection unit. RF patent for invention №2058068 // Inventions. Utility models, from 04/10/1996.

2. Maarschalkerweerd Jan M. UV fluid treatment device and method. Patent No. EP 788462.

3. Vereshchagin V.L., Zanin V.P., Paur V.A., Vereshchagin L.A. Device for sterilizing liquids. RF patent №2071946 // Inventions. Utility models, from 01.20.1997.

4. Lison J., Mendes E. Radiation therapy apparatus Using LED matrix. UK Patent Application 2212010, 07/12/89, MKI5 A61N 5/06.

5. Patent US 20020029071. Therapeutic light source and method.

Claims (1)

A device for treating liquids with UV radiation, containing at least in a single copy a UV radiation source with power terminals arranged coaxially to one of the foci of the housing, made in the form of an elliptical cylinder with an internal surface reflecting in the UV range, coaxial to the second focus of which UV radiation is a pipe through which the liquid to be irradiated moves, characterized in that the source of ultraviolet radiation is made in the form of a LED mat rolled into a cylinder with UV the location of the LEDs on the outside of the cylinder mounted in a different focus of the elliptical body.

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