DEVICE FOR TREATMENT OF LIQUIDS AND THE METHOD OF TREATMENT OF LIQUIDS WITH USE OF THIS DEVICE

Abstract

The device for treatment of liquids by the help of generation of an electrically powered discharge of low-temperature plasma in liquid environment where is, when the liquid flows, possible to achieve generation of cavitation or super-cavitation which consists of mutually in series connected a pressure regulator and a cavitation tube which is formed by two mutually connected inlet chamber, confusor, working chamber, diffusor and a discharge chamber, where the essence of the invention is that there is in the inlet chamber in its lengthwise axis in direction of liquid flow placed a powered electrode which by its free end reaches into the working chamber and to it is electrically conductive connected a high voltage source whereas the powered electrode is electrically insulated from the body of the cavitation tube and also is in the discharge chamber placed a grounding electrode which is in electric contact with the liquid. Further is the essence of the invention the method of treatment of liquids by the help of this device.

Claims

1. A device for treatment of liquids by the help of generation of an electrically powered discharge of low-temperature plasma in liquid environment where is, when the liquid flows, possible to achieve generation of cavitation or super-cavitation which consists of mutually in series connected a pressure regulator and a cavitation tube which is formed by two mutually connected an inlet chamber, confusor, working chamber, diffusor and a discharge chamber, wherein there is in the inlet chamber in its lengthwise axis in direction of liquid flow placed a powered electrode which by its free end reaches into the working chamber and to it is electrically conductive connected a high voltage source whereas the powered electrode is electrically insulated from the body of the cavitation tube and also is in the discharge chamber placed a grounding electrode which is in electric contact with the liquid.

2. The device according to the claim 1, wherein the powered electrode is fixed on an electrode support which is placed inside of the inlet chamber perpendicularly to the lengthwise axis of the cavitation tube from which is electrically insulated whereas the powered electrode is with the electrode support electrically connected and to the electrode support is connected the high voltage source.

3. The device according to the claim 2, wherein the electrode support and the powered electrode are made hollow with a formed common transit cavity which is open on its one side out from the cavitation tube and on the other side on the free end of the powered electrode which reaches into the working chamber.

4. The device according to claim 1, wherein the grounding electrode is made as a part of the shell of the discharge chamber.

5. The device according to claim 1, wherein the grounding electrode is made as an oscillating ultrasound powered tip which is connected to an ultrasound generator.

6. The device according to claim 1, wherein behind the discharge chamber is placed an ejector formed by a supply chamber which is connected to the discharge chamber and a throat where from the supply chamber goes a suction pipeline which is led into the throat.

7. The device according to claim 1, wherein behind the discharge chamber is to the cavitation tube connected a pump.

8. A method of treatment of liquids by the help of the device according to claim 1, wherein the low-temperature plasma is generated into the place of generation of the cavitation or super-cavitation or to close vicinity of its generation against the flow of the liquid, namely in direction of its flow, by the help of the powered electrode which is placed in line with the flow of the liquid whereas strength of frequency of high voltage discharge ranges in values 0 to 20 MHz.

9. The method according to the claim 8, wherein the plasma is ultrasound stimulated.

10. The method according to claim 8, wherein into the place of formation of cavitation or super-cavitation is supplied gas.

11. The method according to claim 8, wherein into the place of formation of cavitation of super-cavitation is supplied solid substance in powdered form.

12. The method according to the claim 11, wherein the solid substance in powdered form is photo reactive.

13. The method according to claim 8, wherein the liquid is sucked from the area behind the place of disappearance of the cavitation.

14. The device according to claim 3, wherein the grounding electrode is made as a part of the shell of the discharge chamber.

15. The device according to claim 3, wherein the grounding electrode is made as an oscillating ultrasound powered tip which is connected to an ultrasound generator.

16. The device according to claim 5, wherein behind the discharge chamber is placed an ejector formed by a supply chamber which is connected to the discharge chamber and a throat where from the supply chamber goes a suction pipeline which is led into the throat.

17. The device according to claim 6, wherein behind the discharge chamber is to the cavitation tube connected a pump.

18. A method of treatment of liquids by the help of the device according to claim 7, wherein the low-temperature plasma is generated into the place of generation of the cavitation or super-cavitation or to close vicinity of its generation against the flow of the liquid, namely in direction of its flow, by the help of the powered electrode which is placed in line with the flow of the liquid whereas strength of frequency of high voltage discharge ranges in values 0 to 20 MHz.

19. The method according to claim 9, wherein into the place of formation of cavitation or super-cavitation is supplied gas.

20. The method according to claim 9, wherein into the place of formation of cavitation of super-cavitation is supplied solid substance in powdered form.

Description

CLARIFICATION OF DRAWINGS

[0023] Particular examples of invention design are schematically illustrated in enclosed drawings where:

[0024] FIG. 1 is a schematic drawing of the device in cavitation mode,

[0025] FIG. 2 is a schematic drawing of the device in super-cavitation mode,

[0026] FIG. 3 is a schematic drawing of the device with alternative design of grounding electrode,

[0027] FIG. 4 is a schematic drawing of the device with added ejector and

[0028] FIG. 5 is a schematic drawing of the device with an ultrasound generator connected to the grounding electrode.

[0029] The drawings which illustrate presented invention and consequently described examples of particular design do not in any case anyhow limit the extent of the protection mentioned in the definition yet solely clarify the essence of the invention.

EXAMPLES OF INVENTION DESIGN

[0030] The device for pursuit of the method of treatment of liquids consists, in basic design which is illustrated in FIG. 1, of mutually in series connected a pressure regulator 1 and a cavitation tube 2 which is formed by in series on each other connected a cylindrical inlet chamber 21, confusor 22, cylindrical working chamber 21, diffusor 24 and a cylindrical discharge chamber 25. In the inlet chamber 21 is perpendicularly to the lengthwise axis of the cavitation tube 2 placed an electrode support to which is fixed an oblong powered electrode 3 placed on the lengthwise axis of the inlet chamber 21 and reaches with its free end into the working, chamber 23, whereas the powered electrode 3 is electrically conductive connected with the electrode support 31 yet both elements 3 and 31 are from the body of the cavitation tube 2 electrically insulated. To the electrode support 31 is connected a high voltage source 4 by which is via the electrode support 31 powered the powered electrode 1. In the discharge chamber 25 is placed the grounding electrode 5 by the help of which is grounded also the liquid flowing in the cavitation tube 2. The circular shape of cross section of the cavitation tube 2 is not only possible design, as the cross section of the cavitation tube 2 can have arbitrary shape.

[0031] Alternatively are the electrode support 31 and the powered electrode a made hollow with formed common non-illustrated transit cavity which is open on one side out from the cavitation tube 2 and on the other side on free end of the powered electrode 3 reaches into the working chamber 23 as it is illustrated in FIGS. 3 to 5.

[0032] Another alternative is design of the grounding electrode as a part of the shell of the cylindrical discharge chamber 25 as it is illustrated in FIG. 3.

[0033] Another alternative which is illustrated in FIG. 4 is placement of an ejector 6 behind the discharge chamber 25. The ejector 6 is formed by a supply chamber 61 which is connected to the discharge chamber 25 and a throat 62. From the supply chamber 61 is sideways taken out a suction pipeline 63 which opens into the throat 62. The ejector 6 can be alternatively substituted by a non-illustrated pump.

[0034] Alternatively is the grounding electrode 5 designed as an oscillating ultrasound powered tip which is connected to an ultrasound generator 8 as it is illustrated in FIG. 5.

[0035] During pursuit of the method of treatment of the liquids according to the FIG. 1 is by the pressure regulator 1 kept such pressure value of the liquid which flows through the inlet chamber 21 into the cavitation tube 2 to enable at the place of contraction, generation of cavitation or super-cavitation. The liquid is from the inlet chamber 21 taken to the confusor 22 where comes to significant increase of its speed and at the same time to decrease of the pressure, namely under pressure of saturated vapors. In this moment in the confusor 22 start to appear first bubbles which at high speed advance through the working chamber 23 where starts to generate cavitation. In the diffusor 24 comes, thanks to separation of a boundary layer, to next decrease of the pressure and significant extension of the cavitation zone which fills practically the whole space of the diffusor 24 and advances even into the discharge chamber 25 where comes to generation of cavitation cloud 71. Possibly comes to generation of super-cavitation 22 when the liquid flows only through the central part of the discharge chamber 25 and around it is the space completely filled with super-cavitation medium as it is illustrated in FIG. 2. By the high voltage source 4 whose frequency ranges between 0 to 20 MHz is powered the powered electrode 3 through whose potential toward the grounding electrode 5 is generated electromagnetic field whose direction is parallel with the direction of liquid flow. Through this electromagnetic field are then powered the discharges of the plasma which burns in the whole area of the cavitation 71 or super-cavitation 72.

[0036] In an alternative design when the electrode support 31 and the electrode 3 are made hollow, can be through the cavity, which is formed inside of them, supplied into the space of generation of the cavitation 71 or super-cavitation 72 gas or solid particles.

INDUSTRIAL USABILITY

[0037] The invention is usable for generation of low-temperature plasma in liquids which serves for plasma treatment of liquids or suspensions of liquids which contain biological and chemical contaminants or liquids which contain dispersed powders but also for treatment of non-conductive materials in the form of rods and threads in liquids without access of air in hygiene industry, chemical industry, building industry, industry, food industry and so on. The invention is usable for decontamination of water not only waste water but also for sterilization of potable and service water and furthermore for treatment of liquids based on hydrocarbons as are for example oils, paints and so on.