RU2225364C1 - Device for ultra-violet decontamination of water - Google Patents

Abstract

FIELD: decontamination of natural water and sewage; public services; medicine; food-processing and other industries. SUBSTANCE: proposed device has vertical cylindrical housing with upper branch pipe for delivery of water and lower branch pipe for discharge water, ultra-violet bactericidal lamp and protective quartz cover mounted coaxially inside housing. Provided between upper branch pipe and wall of housing is inlet circular chamber; outlet of this chamber is made in form of "n" pairs of inlet nozzles; adjacent nozzles are directed towards each other. EFFECT: simplified construction due to avoidance of control members and water level and gas pressure indicators; enhanced decontamination. 2 dwg

Description

 The invention relates to the technology of disinfection of natural and waste waters and can be used in utilities, medicine, food industry and other industries.

 A device for ultraviolet disinfection of water / A.C. USSR 1669869, class C 02 F 1/32, 1991 / comprising a vertical cylindrical body with spaced apart nozzles for supplying and discharging water, a bactericidal ultraviolet lamp and a protective quartz case mounted coaxially in the body cavity, an ejector, two tubes recessed into the annular cavity between a lamp and a cover, one of which is connected to the atmosphere, and the other to the vacuum nozzle of the ejector. In this case, the ejector is attached to the pipe for supplying water, and the pipe for draining water is made in the bottom of the device.

 The device operates as follows. Processed water is pumped under pressure through the ejector and inlet to the body cavity. When a lamp burns in an annular cavity between the lamp and a quartz case, ozone is formed from atmospheric oxygen under the influence of UV radiation. The resulting ozone-air mixture is sucked off by the ejector and enters, sparging the treated water, into the body cavity. As a result of intensive mixing of the ozone-air mixture with water in the ejector and in the body itself, ozone suppresses the vital activity of microorganisms.

 A disadvantage of the known device is the structural complexity of the device due to the need for devices for regulating the water level and gas pressure in the body cavity and for bubbling water with gas. The effect on water is mainly provided by ozone, ultraviolet is effective only on the surface film of water, and the bulk of the water is not irradiated, thus, the possibility of a synergistic effect of ultraviolet and ozone is not fully used.

 A device for ultraviolet disinfection of water / A.C. USSR 1678769, class C 02 F 1/32, 1991 /, comprising a vertical cylindrical body with spaced apart nozzles for supplying and discharging water, a UV germicidal lamp and a protective quartz case mounted coaxially in the body cavity. In this case, the water supply pipe is installed tangentially and is located above the pipe outlet. In addition, the device is equipped with an air pressure sensor in the housing cavity and a water supply pump with a drive, which is functionally connected to the pressure sensor.

 The device operates as follows. The pump through the inlet tangential branch pipe to the cavity of the body serves the treated water. The tangential inlet of water causes turbulization of the water flow and ensures that it flows down the wall of the casing in the form of an annular spiral wall jet. When a lamp burns in an annular cavity between a quartz case and a housing, ozone is formed from atmospheric oxygen under the influence of UV radiation. An annular spiral stream of water flowing around the lamp in an ozone-air atmosphere is simultaneously exposed to both ultraviolet radiation and ozone, actively absorbing it. The synergistic effect of ultraviolet and ozone suppresses the vital activity of microorganisms.

 A disadvantage of the known device is the structural complexity due to the need for devices for regulating the water level and gas pressure in the cavity of the housing, as well as the insufficient intensity of the release of dissolved air, since after turbulization of the flow by tangential inlet, the flow is laminated in the annular working area between the housing and the protective cover and the allocation of dissolved air stops. This is facilitated by the selection of water by the outlet pipe in the bottom of the device.

 The objective of the invention is to develop a simpler and more effective device for ultraviolet disinfection of water.

 The technical result achieved by the implementation of the invention is to simplify the design of the device by eliminating devices for regulating and controlling the water level and gas pressure, as well as increasing the sterilization depth (or increasing productivity) by creating conditions for a more intense release of oxygen dissolved in water and the formation of more the amount of ozone.

 The required technical result is achieved by the fact that the proposed device for ultraviolet disinfection of water, as well as the known device, includes a vertical cylindrical body with spouts spaced apart in height: the upper one for supply and the lower one for water drainage, an ultraviolet germicidal lamp and a protective quartz cover, mounted coaxially in the body cavity.

 However, in contrast to the known device, an annular input chamber is made between the upper inlet pipe and the casing wall in the proposed device, and the chamber exit through the casing wall is made in the form of n pairs of inlet nozzles, the nozzles being directed towards each other in pairs.

 The invention is illustrated in the drawing, in which figure 1 schematically shows the design of the proposed device for disinfecting water; figure 2 is a section aa of figure 1.

 The device includes a vertical cylindrical housing 1 with spaced apart nozzles for supplying 2 and draining 3 water, a bactericidal lamp 4 of ultraviolet radiation and a protective quartz cover 5 mounted coaxially in the cavity of the housing 1, cable 6 for supplying power to the lamp 4. Between the upper supply nozzle 2 and an inlet annular chamber 7 is made by the wall of the casing 1, and n pairs of inlet nozzles 8 are made from the chamber in the casing wall 1 from the chamber, moreover, the neighboring nozzles are pairwise directed towards each other.

 The device operates as follows. The pump through the inlet pipe 2, the inlet annular chamber 7 and the nozzle 8 in the cavity of the housing 1 fall treated water. The water supply in the form of counter-colliding n pairs of jets provides the conditions for the formation of an intensive cavitation regime. The pressure in the gap between the housing 1 and the cover 5 is several times lower than the pressure in the supply pipe in the supply pipe 2, so air is released from the water. The formation of cavitation vacuum microcavities leads to the intense release of dissolved air in them and the formation of micro bubbles, i.e. to the formation of a water-gas emulsion. The released air is enriched with oxygen compared to atmospheric because of its high solubility in water. When the lamp 4 is burned in the annular cavity between the quartz case 5 and the housing 1, ozone is formed from atmospheric oxygen under the influence of UV radiation. The resulting ozone is absorbed degassed upon expiration as a result of pressure drops and cavitation with water. An annular turbulent stream of water flowing around the lamp and in the ozone-air atmosphere is simultaneously exposed to ultraviolet radiation and ozone. The synergistic effect of ultraviolet and ozone suppresses the vital activity of microorganisms.

Claims (1)

A device for ultraviolet water disinfection, including a vertical cylindrical body with nozzles spaced apart in height: the upper one for inlet and the lower one for water drainage, an ultraviolet germicidal lamp and a protective quartz case installed coaxially in the body cavity, characterized in that between the upper inlet port and an inlet annular chamber is made by the casing wall, and the exit from the chamber through the casing wall is made in the form of “n” pairs of inlet nozzles, the adjacent nozzles directed in pairs towards echu each other.

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