阅读说明：本技术 通过水力空化进行液体净化的方法以及执行所述方法的装置 (Method for purifying a liquid by hydrodynamic cavitation and device for carrying out said method ) 是由 米兰·耶雷米奇 德拉甘·耶雷米奇 斯瑞克·卡多尼克 于 2018-05-07 设计创作，主要内容包括：本发明涉及一种用于液体(诸如饮用水)介质净化的方法,通过该方法改进待净化流体的生物和化学组成。本发明还涉及用于执行所述方法的装置。根据本发明,通过以下步骤来净化液体：在第一过滤器件(2)上从所述液体中除去粗颗粒,用至少一个喷嘴(3)将液体分散到工作腔室(4)中,在该工作腔室中,液体暴露于工作压力,从至少一个入口孔(5)将气体或气体混合物引入该腔室中。(The present invention relates to a method for the purification of a liquid, such as drinking water, medium, by which the biological and chemical composition of the fluid to be purified is improved. The invention also relates to a device for carrying out said method. According to the invention, the liquid is purified by the following steps: coarse particles are removed from the liquid on the first filter means (2), the liquid is dispersed with at least one nozzle (3) into a working chamber (4) where it is exposed to a working pressure, and a gas or gas mixture is introduced into the chamber from at least one inlet opening (5).)

1. A method for purification of a liquid, such as drinking water, medium, which method improves the biological and chemical composition of the liquid to be purified, characterized in that the method comprises the steps of:

a) is supplied with a first flow rate Q via a supply line₁And inlet pressure p₁The liquid to be purified of (a) is,

b) removing coarse particles from the liquid on a first filter means arranged in the direction of fluid flow and guiding the flow of the liquid,

c) performing a first cavitation phase at the outlet of said first filtering means on the fluid to be purified, in which the flow passesThe flow rate of the body is reduced to a second flow rate Q₂，

d) Leading with a second flow Q₂And inlet pressure p₁Through a dispersion means comprising at least one nozzle, said dispersion means being arranged downstream of said first filtering means,

e) dispersing the liquid to be purified to a working pressure p by means of the at least one nozzle₂In the liquid treatment chamber, a second stage of cavitation is performed in the liquid treatment chamber, resulting in cohesive bond breaking between liquid molecules and dissociation of the liquid molecules,

f) supplying a gas or gas mixture into the liquid treatment chamber through at least one aperture in the liquid treatment chamber and enabling the gas or gas mixture to affect the dissociated liquid molecules,

g) the dispersed purified liquid is liquefied in a first homogenizing means arranged downstream,

h) discharging in a discharge line at a discharge pressure p₃And degassing, optionally arranging a second homogenizing element in the discharge line.

2. Method according to claim 1, characterized in that the pressure p₁、p₂、p₃Has a ratio of p₁＞p₂And p is₂＜p₃≤p₁。

3. Method according to claims 1 and 2, characterized in that the working pressure p₂Below ambient pressure.

4. The method of claim 1, wherein the gas supplied to the chamber through the at least one orifice is selected to be oxygen.

5. The method of claim 1, wherein the gas mixture supplied to the chamber through the at least one orifice is selected to be air.

6. An apparatus for performing the method according to claims 1 to 5, characterized in that the apparatus comprises: a supply line (1) for supplying a fluid to be purified, the supply line (1) having a first filter means (2) arranged therein; a dispersion device (3) arranged downstream, spaced apart from the first filter device (2); a chamber (4) for treating a liquid to be purified, comprising at least one inlet aperture (5) for supplying a gas or a gas mixture to the chamber (4); a second filtering means (6) arranged downstream, spaced apart from the distribution means (3); and optionally a third filter device (7) arranged downstream of the second filter device (6); a discharge line (8) for discharging the purified liquid connected thereto.

7. The device according to claim 6, characterized in that the dispersion element (3) comprises at least one nozzle (9), the nozzles (9) converging in the flow direction of the fluid to be purified.

8. The device according to claim 6, characterized in that said at least one hole (5) in the chamber (4) is formed in a region adjacent to the dispersing means (3).

9. An apparatus according to claims 6 to 8, characterized in that the length L of the chamber (4) in the direction of flow is approximately equal to the distance H between the lower surface of the dispersing device (3) and the apex of an imaginary cone formed by the liquid flow generated by the nozzle (9).

10. The device according to claims 6 to 9, characterized in that the length L of the chamber (4) ranges between 0.8 × H and 1.1 × H.

11. Device according to claims 6 to 10, characterized in that the cross section a of said at least one hole (5) for supplying a gas or a gas mixture into said chamber (4)_zDepending on a cross-section A through the at least one nozzle (9)_tSecond flow rate Q of liquid₂To be cleanedThrough which the liquid flows out.

12. Device according to claim 11, characterized in that said section portion a_zIs selected to be the second flow rate Q₂The power function of (a), that is,

13. device according to claims 11 and 12, characterized in that the index n is preferably chosen in the range of n-1/2, where a deviation of the order of ± 15% is possible.

14. Device according to claims 6 to 12, characterized in that the at least one hole (5) for supplying a gas or gas mixture is provided with blocking means, such as a valve or the like.

15. The device according to claim 6, characterized in that the first homogenizing means (6) comprises through holes that are thinner than the filtering means (2) and/or the second homogenizing means (7).

16. The device according to any one of claims 6 to 13, characterized in that the discharge line (8) is fluidly connected to pumping means.

Technical Field

The present invention relates to a method for purification of a liquid, such as water, medium, by means of which the biological and chemical composition of the fluid to be purified can be improved. The invention also relates to a device for carrying out said method.

Background

Known methods for purification of liquid, such as drinking water, media require relatively high requirements and require complex devices that perform fluid purification separately in a biological and chemical sense. Furthermore, in the state of the known art, the fluid is treated in a homogeneous state and at a pressure equal to or higher than the ambient pressure. Therefore, a complicated, large-sized and expensive apparatus is required, and the size of the apparatus is rapidly increased as the volume of the fluid to be purified is increased.

Disclosure of Invention

The object of the present invention is to create a method for purification of a liquid medium which remedies the drawbacks of the known solutions. The object of the invention also relates to a device for carrying out said method.

According to the invention, the above object is solved by the features stated in the characterizing part of claim 1. Details of the invention are disclosed in the respective dependent claims.

Drawings

The invention is described in further detail by way of non-limiting examples and with reference to the accompanying drawings, in which

Figure 1 shows a schematic cross-sectional view of a device for purifying a liquid medium,

fig. 2 shows a detail of the device of fig. 1.

Detailed Description

A method for purification of a liquid medium, the first step being to have a first flow Q₁And a supply pressure p₁Is injected into the supply line 1. The homogeneous fluid is further led through a downstream located filter device 2, where coarse particles are removed from the fluid and the fluid flows. At the outlet of said filter device 2, a first phase of hydrodynamic cavitation of the fluid to be purified is carried out, in which the flow is reduced to a second flow Q due to the reduction of the free section on the filter device 2₂。

Then, pretreated in the above manner with a second flow rate Q₂Flows through a dispersion means 3 arranged downstream with respect to said filter means 2. The dispersion means 3 comprises at least one nozzle 9, through which nozzle 9 liquid from the supply line 1 enters the chamber 4 for liquid treatment. At the outlet of the at least one nozzle 9, hydrodynamic cavitation of the fluid to be purified is carried out in the fluid treatment chamber 4, wherein the fluid forms at least one jet with a high content of cavitation bubbles. The liquid flowing out of the chamber 4 generates a working pressure p in said chamber 4₂The working pressure p₂Below the supplied fluidPressure p of₁And at the same time is below ambient pressure, so that the surrounding gas or gas mixture is sucked into the chamber 4.

In said chamber 4, intense hydrodynamic cavitation and simultaneous bursting of cavitation bubbles and intense negative pressure aeration take place. By bursting the cavitation bubbles in a negative pressure environment, strong liquid dispersion, strong oxidation of impurities in the fluid and a large amount of gas removal from the liquid are achieved. During the liquid flow through the chamber 4, the liquid dispersion and the negative pressure influence are such that the liquid surface increases in the movement of the flow through the chamber 4.

Thus, the liquid to be purified is cleaned of oxidized gases and impurities. Under the changed aggregation state, due to the hydrodynamic cavitation, the pressure below ambient pressure and the supply of gas or gas mixture, a dissociation of the liquid molecules takes place, which greatly increases the surface of the liquid to be purified. The liquid is thus well disinfected and cleaned of various impurities.

The gas or gas mixture is introduced into the chamber 4 through at least one aperture 5 in the wall of the chamber 4, wherein the at least one aperture 5 in the chamber 4 is formed in a region adjacent to the dispersing means 3. Thus, the gas or gas mixture may affect the dissociated liquid molecules.

The working pressure p in the working chamber 4₂Greater than the cohesion between the molecules of the liquid to be purified and dispersed in the working chamber 4, and therefore susceptible to the action of the disinfectant. Working pressure p₂Is dependent on the amount of gas or gas mixture entering the working chamber 4 through the at least one orifice 5 and the pressure p₃And the treated liquid leaves the chamber 4 in a homogeneous state via the discharge line 8. According to the invention, the pressure p is₁、p₂、p₃The relationship between is p₁＞p₂And p is₂＜p₃≤p₁。

The gas supplied to the working chamber 4 through the at least one orifice 5 is chosen, for example, to be oxygen. Furthermore, the gas mixture supplied to the working chamber 4, for example through the at least one orifice 5, is chosen to be air.

A first homogenizing means 6 is arranged spaced downstream of said dispersing means 3, the first homogenizing means 6 serving to homogenize the purified liquid. Optionally, a second homogenizing means 7 is located downstream and associated with the first homogenizing means 6, a discharge line 8 for discharging the purified liquid being connected to said homogenizing means 7.

As mentioned above, according to the invention, it is provided that the dispersing means 3 comprise at least one nozzle 9 through which the liquid to be purified is subjected to cavitation. Each of the nozzles 9 is formed to converge in the flow direction of the liquid to be purified. In addition, the internal section of each nozzle 9 of the preferred form tapers linearly in the direction of flow of the liquid.

The length L of the chamber 4, viewed in the direction of flow of the fluid to be purified, is approximately equal to the distance H between the apex of an imaginary cone formed by the liquid jets issuing from the nozzles 9 and the lower surface of the dispersion device 3. In a preferred embodiment of the apparatus for performing the method according to the invention, said length L of said chamber 4 ranges between about 0.8 × H and about 1.1 × H.

The total cross-section A of the at least one hole 5 or all holes 5 for supplying a gas or gas mixture into the working chamber 4_zDepending on the total cross-section A through said at least one nozzle 9 or all nozzles 9_tOf the liquid to be purified Q₂The liquid enters the working chamber 4 through the nozzle 9. In a preferred embodiment of the device for carrying out the method according to the invention, said section a_zIs selected as the second flow rate Q₂A power function of, i.e.The index n is preferably from about n ═ n¹/₂Is selected within a range of ± 15% of the size of the deviation is possible. By way of example, it should be noted that at the flow rate Q of the liquid to be purified₂400l/min, the at least one opening 5 and the respective supply of gas or gas mixture into the working chamber 4The total surface A of all the holes 5_zIs 20mm²±15％。

According to the invention, it is provided that the at least one hole 5 for supplying the gas or gas mixture is provided with blocking means (e.g. a valve, etc.). This measure controls the amount of gas or gas mixture to be delivered into the working chamber 4 and the pressure p₂。

Furthermore, according to the invention, it is provided that said first homogenizing means 6 are formed with through holes that are thinner than the filtering means 2 and the second homogenizing means 7.

Furthermore, according to the invention, it is provided that the purified liquid leaves the working chamber 4 by means of gravity via the discharge line 8. However, in a possible embodiment, the discharge line 8 is fluidly connected to a pumping means which discharges the purified liquid by force.

The method and the apparatus for performing the method are widely used in many fields, such as the treatment of drinking water, industrial water, agricultural water and waste water. The method and apparatus are suitable for reducing scale, destroying microorganisms in water, removing legionella and pesticides from water, removing organic and inorganic contaminants from water, enhancing the effectiveness of added water-purifying disinfectants, and the like. In addition, the method and the device significantly reduce the opacity of water and improve the taste and smell of water. In addition, it has been demonstrated that the process according to the invention allows scale to be formed in the form of aragonite rather than in the form of calcite.