A plasma in-situ activated water mist treatment system and method

Abstract

The present invention discloses a plasma in-situ activated water mist treatment system and method. A plasma jet is formed in a first medium pipe. When the high-speed plasma jet flows through a throat, a local pressure difference causes a liquid to be treated in a first container to be sucked into the throat. The liquid to be treated forms small droplets under the impact of the high-speed plasma jet. A large number of short-lived free radicals, ions and solvated electrons in the plasma jet act rapidly on the droplets near the droplet surfaces, thereby achieving plasma in-situ activated water mist. By controlling a switching valve, the flow direction of the plasma jet is manually switched, and the activated water mist can be directly ejected from the free end of a second pipe portion in the form of activated water mist, which is ready for immediate use. Alternatively, the plasma jet can be allowed to enter a second container through a second conduit and further treat the liquid to be treated in the second container. The liquid to be treated then flows into the first container, is repeatedly sucked by the throat and activated in situ, thereby achieving cyclic treatment of the plasma-activated water mist.

Description

Technical Field

[0001] The present invention relates to the field of plasma application technology, and in particular to a plasma in-situ activated water mist processing system and method. Background Art

[0002] In recent years, the interaction of low-temperature plasmas with liquids has been extensively studied to exploit the active species in gas-phase plasmas to generate chemical activity in the liquid phase. Plasma-activated water has shown great potential as an antimicrobial agent in disinfection, wound healing, or food applications.

[0003] The current method for preparing plasma-activated water is generally to directly impinge gaseous plasma on the water surface. In this method, the active particles cannot be evenly transferred to act on the liquid to be treated, the efficiency of plasma water activation is low, and the method of use is relatively simple. Usually, the active particles are fully acted on the liquid to be treated before being applied to the treated liquid.

[0004] Therefore, according to the current market demand and the remaining technical defects, it is urgent to develop an activation treatment technology that can improve the activation efficiency and can have both activated water and activated water mist application modes. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention aims to provide a system and method for treating water mist by plasma in-situ activation, thereby resolving the problems of low plasma activation efficiency and single application mode in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a plasma in-situ activated water mist treatment system, comprising a plasma generating module, a first medium pipe, and a liquid storage module;

[0008] The first medium pipe is a Venturi tube structure, comprising a first pipe portion, a throat portion, and a second pipe portion connected in sequence;

[0009] The plasma generating module is used to form a plasma jet in the first medium tube, and the plasma jet is driven by gas pressure from the first tube portion through the throat portion into the second tube portion;

[0010] The liquid storage module includes a first container and a second container, the first container and the second container are connected by a connecting pipe. The liquid storage module is also provided with at least one exhaust portion. The throat portion is connected to a first conduit extending into the first container, and the second pipe portion is connected to a second conduit extending into the second container. The second pipe portion is provided with a switching valve for controlling the plasma jet to enter the second conduit or be ejected from its free end.

[0011] In some embodiments, at least one second medium tube is provided on the communicating pipe, the free end of the second medium tube is open, and a plasma activation component is provided on the tube wall of the second medium tube.

[0012] In some embodiments, a cooling member is connected to the second medium tube near the free end.

[0013] In some embodiments, a diameter of the second medium pipe is not greater than a diameter of the first pipe portion of the first medium pipe.

[0014] In some embodiments, the plasma generating module includes an air pump, a power supply unit, a high-voltage electrode and a ground electrode. The air duct of the air pump is connected to the free end of the first tube portion. The power supply unit is electrically connected to the high-voltage electrode and the ground electrode respectively. The high-voltage electrode is connected to the first tube portion, and the ground electrode is connected to the second tube portion.

[0015] In some embodiments, the first tube portion and the second tube portion have the same diameter, the diameter of the throat portion is less than or equal to 2 / 3 of the diameter of the first tube portion, and the length of the throat portion is less than or equal to 1 / 3 of the first medium tube.

[0016] In some embodiments, the diameter of the first conduit is less than or equal to 1 / 2 of the diameter of the throat portion, and the diameter of the second conduit is less than or equal to 2 / 3 of the diameter of the first tube portion.

[0017] In some embodiments, the liquid to be treated ejected from the first conduit enters the throat at an incident angle that is an obtuse angle to the flow direction of the plasma jet.

[0018] In a second aspect, an embodiment of the present application provides a method for treating water mist by plasma in-situ activation, comprising the following steps:

[0019] S1. Pour the liquid to be treated into the liquid storage module so that the liquid level of the liquid to be treated is not higher than the inner wall of the top of the connecting pipe and the liquid level of the liquid to be treated is higher than the lower pipe openings of the first conduit and the second conduit;

[0020] S2. Starting the plasma generating module to form a plasma jet in the first dielectric tube;

[0021] S3, extracting the liquid to be treated in the first container through the first conduit, activating the liquid to be treated in situ at the throat to obtain plasma-activated water mist, and proceeding to step S41 or step S42;

[0022] S41, controlling the conversion valve to close the free end outlet of the second pipe portion, so that the plasma-activated water mist enters the second container through the second conduit;

[0023] S42, controlling the conversion valve to close the second conduit, so that the plasma-activated water mist is directly ejected through the free end outlet of the second pipe portion.

[0024] In some embodiments, in step S41, the plasma-activated water mist flowing through the connecting pipe is secondary activated, and the water mist is condensed and refluxed to discharge the gas.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] The plasma in-situ activated water mist treatment system and method provided in the embodiments of the present application forms a plasma jet in a first medium pipe. When the high-speed plasma jet flows through the throat, the local pressure difference causes the liquid to be treated in the first container to be sucked into the throat. The liquid to be treated forms small droplets under the impact of the high-speed plasma jet. The large number of short-lived free radicals, ions, and solvated electrons in the plasma jet near the droplet surface quickly act on the droplets, improving the activation efficiency through the large surface area to volume ratio of the droplets, thereby achieving plasma in-situ activation of the water mist.

[0027] By controlling the switching valve, the flow direction of the plasma jet can be manually switched, and it can be directly sprayed out from the free end of the second pipe in the form of activated water mist, which can be used immediately after being prepared. The plasma jet can also be allowed to enter the second container through the second conduit and further treat the liquid to be treated in the second container. The liquid to be treated then flows into the first container, is repeatedly sucked up by the throat and activated in situ, thus realizing the cyclic treatment of the plasma-activated water mist.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative effort.

[0030] Figure 1 This is a schematic structural diagram of a conversion valve covering the free end of the second pipe portion in a plasma in-situ activated water mist treatment system according to an embodiment.

[0031] Figure 2 This is a structural schematic diagram of a conversion valve blocking a second conduit in a plasma in-situ activated water mist treatment system according to an embodiment. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be directly connected to the other device but with an intervening device.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0036] First, refer to Figures 1 to 2 , this embodiment provides a plasma in-situ activated water mist treatment system, comprising a plasma generating module, a first medium pipe 2 and a liquid storage module;

[0037] The first medium pipe 2 is a Venturi tube structure, comprising a first pipe portion 21, a throat portion 22, and a second pipe portion 23 connected in sequence;

[0038] The plasma generating module is used to form a plasma jet in the first medium pipe 2. Driven by gas pressure, the plasma jet passes from the first pipe portion 21 through the throat portion 22 and enters the second pipe portion 23.

[0039] The liquid storage module includes a first container 7 and a second container 8, which are connected to each other by a connecting pipe 9. The first container 7 and the second container 8 are both used to carry the liquid to be treated. The liquid storage module is also provided with at least one exhaust portion 14, which can be provided on any one of the first container 7, the second container 8 and the connecting pipe 9. The throat 22 is connected to the first conduit 6 extending into the first container 7, and the second pipe portion 23 is connected to the second conduit 13 extending into the second container 8. The second pipe portion 23 is provided with a conversion valve 12 for controlling the plasma jet to enter the second conduit 13 or be ejected from its free end.

[0040] It should be noted that the liquid to be treated is poured into the liquid storage module, and the liquid to be treated can flow between the first container 7 and the second container 8 through the connecting pipe 9. When the plasma generating module is started and a high-speed plasma jet is formed in the first medium tube 2, the plasma jet flows from the first tube portion 21 with a larger diameter through the throat portion 22 with a smaller diameter, and then enters the second tube portion 23 with a larger diameter. When the plasma jet flows through the throat 22, a pressure difference is formed between the throat 22 and the liquid surface of the first container 7, so that the liquid to be treated in the first container 7 enters the throat 22 through the first conduit 6. The liquid to be treated forms small droplets under the impact of the high-speed plasma jet. There are a large number of short-lived free radicals, ions and solvated electrons in the plasma jet. When the liquid to be treated is atomized in the throat 22, these substances surround the surface of the droplets and quickly act on the droplets. Compared with ordinary flowing liquids, a large amount of liquid is produced after atomization, and the droplets have a larger surface area to volume ratio, which can greatly improve the activation efficiency and realize plasma in situ activation of water mist.

[0041] After the plasma jet activates the droplets, a plasma-activated water mist is formed. After the plasma-activated water mist enters the second pipe portion 23, there are two application modes under the switching control of the conversion valve 12. The conversion valve 12 is set in the second pipe portion 23. The conversion valve 12 can be manually controlled to change its position state, thereby switching the flow direction of the plasma-activated water mist, such as Figure 2 As shown, it can be directly sprayed out from the free end of the second tube portion 23 in the form of activated water mist, ready for use, as shown in FIG. Figure 1 As shown, the plasma-activated water mist can also enter the second container 8 through the second conduit 13. Since the first container 7 and the second container 8 are connected, when the liquid to be treated is drawn up the throat 22 from the first conduit 6 and atomized, it flows back from the second conduit 13 and communicates with the liquid to be treated through the connecting pipe 9 between the first container 7 and the second container 8, thereby realizing the circulation treatment of the plasma-activated water mist.

[0042] Furthermore, when the plasma-activated water mist is circulated to a certain extent, the liquid to be treated in the liquid storage module has been fully activated, and the conversion valve 12 can be controlled to open the free end of the second tube portion 23, and the liquid to be treated can be directly extracted through the first guide rail, and after being activated again in situ, it is directly sprayed out in the form of water mist.

[0043] As an embodiment, the conversion valve 12 is electrically controlled, and a button or a switch key is used to automatically change the position of the conversion valve 12, thereby controlling the flow direction of the plasma-activated water mist by blocking the second conduit 13 or blocking the free end of the second tube portion 23.

[0044] It should be noted that the switching valve 12 can be operated in a variety of ways. In addition to blocking the second conduit 13 and the second tube portion 23, dual channels can be provided within the second tube portion 23, each equipped with a switching valve 12 to independently control the flow and blocking of each channel. In short, any method that can control the plasma-activated water mist from entering the second conduit 13 or being ejected from the free end of the second tube portion 23 falls within the scope of the present invention.

[0045] Preferably, since the pressure on the liquid surface of the liquid to be treated in the liquid storage module needs to be maintained at atmospheric pressure, the liquid storage module needs to have at least one exhaust portion 14 for discharging the gas input from the plasma generating module. Therefore, the first container 7 can be set to be open and the second container 8 can be set to be sealed at the top.

[0046] Preferably, at least one second medium pipe 10 is provided on the connecting pipe 9, and the free end of the second medium pipe 10 is open, which is equivalent to the free end of the second medium pipe 10 being the exhaust portion 14. The gas entering the second container 8 through the second conduit 13 will rise to the second medium pipe 10 when passing through the connecting pipe 9 and be discharged from its free end.

[0047] As an embodiment, a plasma activation component 15 is provided on the tube wall of the second dielectric tube 10. The plasma activation component 15 includes a second high-voltage electrode and a second ground electrode. The second high-voltage electrode and the second ground electrode are arranged on the outer tube wall of the second dielectric tube 10. Since not only gas but also some plasma-activated water mist rises from the connecting pipe 9 into the second dielectric tube 10, this plasma-activated water mist will also rise into the second dielectric tube 10 due to its lighter weight. Therefore, after the second high-voltage electrode and the second ground electrode are energized, secondary activation of the plasma-activated water mist can be achieved, thereby improving the activation efficiency of the overall circulation treatment.

[0048] As an embodiment, the second medium tube 10 is connected to a cooling member 11 near the free end. The cooling member 11 can be in the form of a semiconductor refrigeration plate and is attached to the position of the second medium tube 10 near the free end. The main purpose is to cool the free end of the second medium tube 10 so that the plasma-activated water mist passing through here is cooled and turned into droplets, which drip again to avoid the loss of water mist.

[0049] Of course, the cooling component 11 can also be other cooling forms. For example, after the external element is cooled, it is thermally connected to the free end of the second medium pipe 10 by building a cold bridge, and a mesh structure is set up near the free end of the second medium pipe 10. The temperature of this structure is relatively low. On the one hand, it reduces the local ambient temperature of the free end of the second medium pipe 10. On the other hand, when water mist passes through this mesh, it will be condensed into droplets due to the cold and adhere to this mesh structure, and finally drip down.

[0050] In addition, in order to allow the droplets formed by the cooling of the plasma-activated water mist to drip better, the free end of the second medium tube 10 can be set to have a certain inclination angle or curvature to increase the flow path of the water mist. A cooling member 11 is set at the inclination or arc to increase the cooling time of the water mist through maze-like heat conduction, thereby better recovering the water mist.

[0051] In this embodiment, the plasma generating module includes an air pump 1, a power supply unit 4, a high-voltage electrode 31 and a ground electrode 32. The air duct of the air pump 1 is connected to the free end of the first tube portion 21, and the air pump 1 introduces a working gas into the free end of the first tube portion 21. The working gas can be air, an inert gas, CO2, etc. The power supply unit 4 is electrically connected to the high-voltage electrode 31 and the ground electrode 32 respectively. The high-voltage electrode 31 is connected to the first tube portion 21, and the ground electrode 32 is connected to the second tube portion 23. The high-voltage electrode 31 and the ground electrode 32 are respectively located at the two ends of the throat 22. The high-voltage electrode 31 can be a ring electrode or a needle electrode to ensure that gas discharge occurs near the high-voltage electrode 31, and the plasma jet is sprayed from the high-voltage electrode 31 to the ground electrode 32, that is, the plasma jet enters the second tube portion 23 from the first tube portion 21 through the throat 22.

[0052] Preferably, the power supply unit 4 may be an AC high-voltage current or a DC pulse high-voltage power supply.

[0053] Preferably, the air pump 1 is frequency-variable driven and has an adjustable flow rate, which controls the circulation speed during the plasma-activated water mist circulation treatment. When the circulation treatment is completed and the plasma water mist is sprayed out in the form of plasma water mist, it can be used to control the parameters such as the jet distance, jet speed, and droplet diameter of the plasma-activated water mist.

[0054] As an embodiment, in order to improve the atomization effect of the liquid to be treated in the throat 22 and produce more small droplets, the connection angle between the first conduit 6 and the throat 22 is adjusted so that the liquid to be treated ejected from the first conduit 6 enters the throat 22 at an incident angle that is an obtuse angle to the flow direction of the plasma jet, that is, the liquid to be treated is sprayed obliquely backward into the throat 22, forming a collision with the plasma jet in opposite directions, thereby increasing the impact force, further atomizing the liquid to be treated, and forming a smaller volume of small droplets.

[0055] Preferably, a porous diverter plate is arranged at the outlet where the first conduit 6 is connected to the throat 22. After the liquid to be treated passes through the diverter plate, it is divided into multiple small liquid columns. After the multiple small liquid columns enter the throat 22, they collide with the plasma jet, thereby improving the atomization effect by reducing the volume of the liquid column.

[0056] Preferably, a flow blocking structure is provided at the position of the throat 22 corresponding to the position where the liquid column to be treated is ejected. This flow blocking structure is recessed into the throat 22 and is directly opposite to the outlet of the first conduit 6. The liquid to be treated ejected from the outlet of the first conduit 6 hits the flow blocking structure to form dispersion, which can effectively reduce the volume of the droplets.

[0057] As an embodiment, in order to improve the atomization and in-situ activation effects, ensure that the liquid to be treated drawn up to the throat portion 22 is fully activated, and avoid waste or insufficiency of the plasma jet, in this embodiment, the dimensions of each pipeline structure are restricted. The diameters of the first tube portion 21 and the second tube portion 23 are the same, ranging from 3 mm to 5 mm. The diameter of the throat portion 22 is less than or equal to 2 / 3 of the diameter of the first tube portion 21. The length of the throat portion 22 is less than or equal to 1 / 3 of the total length of the first medium tube 2. The working gas flow rate is controlled between 6 L / min and 20 L / min. The diameter of the first conduit 6 is less than or equal to 1 / 2 of the diameter of the throat portion 22. The diameter of the second conduit 13 is less than or equal to 2 / 3 of the diameter of the first tube portion 21. The diameter of the second medium tube 10 is not greater than the diameter of the first tube portion 21 in the first medium tube 2. The diameter of the second medium tube 10 is similar to that of the first tube portion 21, ranging from about 3 mm to 5 mm, which can achieve better discharge characteristics of the plasma activation component 15.

[0058] In a second aspect, this embodiment provides a method for treating water mist by plasma in-situ activation, comprising the following steps:

[0059] S1. Pour the liquid to be treated into the liquid storage module so that the liquid level of the liquid to be treated is not higher than the inner wall of the top of the connecting pipe 9, that is, ensure that the air passages between the first container 7 and the second container 8 are connected, the air pressure is consistent, both are atmospheric pressure, the liquid level of the liquid to be treated is higher than the lower pipe openings of the first conduit 6 and the second conduit 13, and the first conduit 6 and the second conduit 13 are both inserted below the liquid level, which facilitates the first conduit 6 to extract the liquid to be treated and also facilitates the gas coming out of the second conduit 13 to mix the plasma-activated water evenly in a bubbling manner, so that the water mist concentration entering the second medium pipe 10 is higher;

[0060] S2, starting the plasma generating module to form a plasma jet in the first medium tube 2. Driven by gas pressure, the plasma jet flows from the first tube portion 21 through the throat portion 22 into the second tube portion 23;

[0061] S3. The liquid to be treated in the first container 7 is extracted through the first conduit 6, and the liquid to be treated is activated in situ in the throat 22 to obtain plasma-activated water mist. The process can be manually selected to proceed to step S41 or step S42;

[0062] S41, controlling the switching valve 12 to close the free end outlet of the second pipe portion 23, allowing the plasma-activated water mist to enter the second container 8 through the second conduit 13. The plasma-activated water mist is fully mixed with the liquid to be treated in the second container 8 by underwater bubbling. Of course, as the liquid in the second container 8 increases, part of the liquid will flow back to the first container 7 through the connecting pipe 9, thereby achieving a cyclic activation treatment.

[0063] S42, control the switching valve 12 to close the second conduit 13, so that the plasma-activated water mist is directly ejected through the free end outlet of the second pipe portion 23, that is, the liquid to be treated is pumped up the throat portion 22, atomized and activated in situ, and directly ejected from the second pipe portion 23.

[0064] Of course, after a period of time of step S41 processing, when the liquid to be treated in the liquid storage module is fully activated, step S42 can be entered, that is, after a certain volume of plasma-activated water is prepared, it is sprayed out from the second pipe part 23 in the form of plasma-activated water mist.

[0065] As an embodiment, in step S41, due to the plasma-activated water mist entering the second container 8 through the second conduit 13, a portion of the water mist and gas will escape from the liquid to be treated. This portion of the water mist and gas will flow through the connecting pipe 9. In this embodiment, this portion of the plasma-activated water mist is secondary activated, and the water mist therein is condensed and refluxed, and the gas is discharged, which can further improve the effect of the water mist activation and reduce the loss rate of the water mist.

[0066] In addition, as an embodiment, the liquid to be treated can be an olefin organic solution, and the working gas is CO2 gas. After plasma discharge, CO2 gas produces O atoms, which can induce olefin epoxidation and achieve a higher epoxidation efficiency. Therefore, using the treatment system and method proposed in this embodiment, the CO2 plasma can be used to activate the olefin solution in situ, further increasing the reaction efficiency of the O atoms and the olefin solution.

[0067] Compared to the prior art, the above embodiment provides a system and method for treating water mist by plasma in-situ activation. A plasma jet is formed in the first medium pipe 2. When the high-speed plasma jet flows through the throat 22, the local pressure difference causes the liquid to be treated in the first container 7 to be sucked into the throat 22. The liquid to be treated is formed into small droplets under the impact of the high-speed plasma jet. A large number of short-lived free radicals, ions, and solvated electrons in the plasma jet act rapidly on the droplets near the surface. The activation efficiency is improved by the large surface area to volume ratio of the droplets, thereby achieving plasma in-situ activation of the water mist.

[0068] By controlling the switching valve 12, the flow direction of the plasma jet can be manually switched, and it can be directly ejected from the free end of the second tube portion 23 in the form of activated water mist, which is ready for use. Alternatively, the plasma jet can be allowed to enter the second container 8 through the second conduit 13 and further treat the liquid to be treated in the second container 8. The liquid to be treated then flows into the first container 7, is repeatedly sucked up by the throat portion 22 and activated in situ, thereby realizing cyclic treatment of the plasma-activated water mist.

[0069] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A plasma in-situ activated water mist treatment system, characterized in that: It includes a plasma generating module, a first medium pipe and a liquid storage module; The first medium pipe is a Venturi tube structure, comprising a first pipe portion, a throat portion, and a second pipe portion connected in sequence; The plasma generating module is used to form a plasma jet in the first medium tube, and the plasma jet is driven by gas pressure from the first tube portion through the throat portion into the second tube portion; The liquid storage module includes a first container and a second container, the first container and the second container are connected by a connecting pipe. The liquid storage module is also provided with at least one exhaust portion. The throat portion is connected to a first conduit extending into the first container, and the second pipe portion is connected to a second conduit extending into the second container. The second pipe portion is provided with a switching valve for controlling the plasma jet to enter the second conduit or be ejected from its free end.

2. A plasma in-situ activated water mist treatment system according to claim 1, characterized in that: At least one second medium tube is provided on the communication pipeline. The free end of the second medium tube is open, and a plasma activation component is provided on the tube wall of the second medium tube.

3. A plasma in-situ activated water mist treatment system as claimed in claim 2, characterized in that: The second medium pipe is connected to a cooling member near the free end.

4. A plasma in-situ activated water mist treatment system as claimed in claim 3, characterized in that: The diameter of the second medium pipe is not greater than the diameter of the first pipe portion of the first medium pipe.

5. A plasma in-situ activated water mist treatment system according to any one of claims 1 to 4, characterized in that: The plasma generating module includes an air pump, a power supply unit, a high-voltage electrode and a ground electrode. The air duct of the air pump is connected to the free end of the first tube part. The power supply unit is electrically connected to the high-voltage electrode and the ground electrode respectively. The high-voltage electrode is connected to the first tube part, and the ground electrode is connected to the second tube part.

6. A plasma in-situ activated water mist treatment system as claimed in claim 5, characterized in that: The first pipe portion and the second pipe portion have the same diameter, the diameter of the throat portion is less than or equal to 2 / 3 of the diameter of the first pipe portion, and the length of the throat portion is less than or equal to 1 / 3 of the length of the first medium pipe.

7. A plasma in-situ activated water mist treatment system according to claim 6, characterized in that: The diameter of the first conduit is less than or equal to 1 / 2 of the diameter of the throat portion, and the diameter of the second conduit is less than or equal to 2 / 3 of the diameter of the first pipe portion.

8. The plasma in-situ activated water mist treatment system according to claim 7, characterized in that: The liquid to be treated ejected from the first conduit enters the throat at an incident angle that forms an obtuse angle with the flow direction of the plasma jet.

9. A method for treating water mist by plasma in-situ activation, applied to a system for treating water mist by plasma in-situ activation according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Pour the liquid to be treated into the liquid storage module so that the liquid level of the liquid to be treated is not higher than the inner wall of the top of the connecting pipe and the liquid level of the liquid to be treated is higher than the lower pipe openings of the first conduit and the second conduit; S2. Starting the plasma generating module to form a plasma jet in the first dielectric tube; S3, extracting the liquid to be treated in the first container through the first conduit, activating the liquid to be treated in situ at the throat to obtain plasma-activated water mist, and proceeding to step S41 or step S42; S41, controlling the conversion valve to close the free end outlet of the second pipe portion, so that the plasma-activated water mist enters the second container through the second conduit; S42, controlling the conversion valve to close the second conduit, so that the plasma-activated water mist is directly ejected through the free end outlet of the second pipe portion.

10. The method for treating water mist by plasma in-situ activation according to claim 9, wherein: In step S41, the plasma-activated water mist flowing through the communicating pipe is secondary activated, and the water mist is condensed and refluxed to discharge the gas.

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