Low-temperature plasma activated water preparation device

Abstract

The utility model discloses a low-temperature plasma activated water preparation device, which relates to the technical field of plasma activated water preparation, and comprises a transparent liquid storage tank provided with a first liquid inlet, a first liquid outlet and a gas outlet; the preparation unit comprises a combination sheet, a second electrode sheet and a rectangular cylindrical insulating transparent enclosure wall, the combination sheet sequentially comprises a first dielectric sheet, a first electrode sheet and a second dielectric sheet from top to bottom, and a first cavity is formed among the first dielectric sheet, the first electrode sheet and the second dielectric sheet and is communicated through a connecting pipe and the like. And a cooling unit including a radiator, a water pump, a heat absorption water tank and the like can be arranged. The device can improve the activation efficiency and increase the concentration of active substances, and the cooling unit can stabilize the ionization work and reduce the loss of active components, and has significant advantages.

Description

TECHNICAL FIELD

[0001] The utility model relates to plasma activated water preparation technical field, especially a kind of low-temperature plasma activated water preparation device. BACKGROUND

[0002] Low-temperature plasma activated water as a solution rich in complex active substances, including ozone, hydroxyl radical, hydrogen peroxide, etc., shows broad-spectrum bactericidal ability to bacterial microorganisms. This technology has high sterilization efficiency, little effect on food quality, and is green and residue-free, with significant advantages. In the food field, using plasma activated water to spray or soak food can effectively reduce the number of coliform bacteria, salmonella and other pathogenic microorganisms, thereby prolonging the shelf life of food, and has broad application prospects.

[0003] However, the prior art has many deficiencies in preparing plasma activated water. In the direct water treatment technology, such as water jet, dielectric barrier discharge treatment, etc., there are problems such as small activation area, lack of flow of activated water and small amount of activated water. While the indirect treatment technology has the characteristics of large amount of activated water, the underwater single dielectric quartz tube discharge technology, due to the fact that the plasma cannot directly contact the water body, results in a large loss of active ingredients and low activation efficiency. The traditional underwater plasma discharge technology also relies too much on the plasma excitation effect in the local area when treating the water body, making it difficult to fully treat other parts of the water body, especially when facing large-scale water treatment needs, it is difficult to achieve uniform and efficient water treatment, which seriously limits the large-scale application and promotion of low-temperature plasma activated water technology. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a kind of low-temperature plasma activated water preparation device, to solve the problems existing in the prior art, improve the preparation efficiency of low-temperature plasma activated water.

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0006] The utility model provides a kind of low-temperature plasma activated water preparation device, comprising:

[0007] The liquid storage tank is transparent, and the first liquid inlet, the first liquid outlet and the gas outlet are arranged on the liquid storage tank.

[0008] The preparation unit comprises a combined sheet, a second electrode sheet and a surrounding wall. The combined sheet comprises a first medium sheet, a first electrode sheet and a second medium sheet which are sequentially attached from top to bottom. The edges of the first medium sheet and the second medium sheet are outwardly farther than the edge of the first electrode sheet. The combined sheet further comprises an insulating sealing ring for sealing the edge of the first electrode sheet. The surrounding wall is insulating and transparent. The top end of the surrounding wall is sealingly connected with the bottom surface of the second medium sheet, and the bottom end of the surrounding wall is sealingly connected with the top surface of the second electrode sheet. A first cavity is formed between the second medium sheet, the surrounding wall and the second electrode sheet. A plurality of through holes are provided on the second electrode sheet and communicate with the first cavity. A first air hole is provided on the surrounding wall. A second air hole is provided on the side wall of the liquid storage tank and communicates with the first air hole through a first connecting pipe. The second electrode sheet and the surrounding wall are arranged in the liquid storage tank. The second electrode sheet and the combined sheet are spaced apart from the inner wall of the liquid storage tank at least on one side. The bottom surface of the second electrode sheet is spaced apart from the bottom surface of the liquid storage tank. The first electrode sheet is electrically connected with the live wire of an alternating current power supply, and the second electrode sheet is electrically connected with the zero line of the alternating current power supply.

[0009] The gas injection unit adopts a gas pump. The gas outlet of the gas pump communicates with the second air hole through a second connecting pipe.

[0010] Preferably, the cooling unit comprises a radiator arranged outside the liquid storage tank, a water pump arranged outside the liquid storage tank and a heat absorbing water tank arranged in the liquid storage tank. The heat absorbing water tank is closed, and the first medium sheet serves as the bottom plate of the heat absorbing water tank.

[0011] The liquid storage tank is provided with a second liquid inlet and a second liquid outlet. The heat absorbing water tank is provided with a third liquid inlet and a third liquid outlet. The liquid outlet of the water pump, the second liquid inlet and the third liquid inlet are sequentially connected. The third liquid outlet, the second liquid outlet and the liquid inlet of the radiator are sequentially connected. The liquid outlet of the radiator communicates with the liquid inlet of the water pump.

[0012] Preferably, the first medium sheet and the second medium sheet respectively extend out of the liquid storage tank at both ends, and the first medium sheet and the second medium sheet are sealingly connected with the liquid storage tank.

[0013] Preferably, the radiator is a finned radiator.

[0014] Preferably, the first medium sheet, the first electrode sheet and the second medium sheet are sequentially bonded. The first medium sheet and the second medium sheet are sealingly connected with the insulating sealing ring.

[0015] Preferably, the surrounding wall is in the shape of a rectangular cylinder.

[0016] Preferably, the first medium sheet, the first electrode sheet, the second medium sheet and the second electrode sheet are parallel to each other.

[0017] Preferably, the first vent hole is higher than the second electrode sheet.

[0018] Preferably, the materials of the first medium sheet and the second medium sheet are quartz or glass; the materials of the first electrode sheet and the second electrode sheet are aluminum, copper or stainless steel; and the materials of the liquid storage tank, the surrounding wall and the heat absorbing water tank except the first medium sheet are acrylic.

[0019] The utility model also provides a kind of preparation method of low temperature plasma activated water, based on above-mentioned preparation device of low temperature plasma activated water, by the first liquid inlet injects the liquid needing activation into the liquid storage tank, then opens the air pump and injects air into the first chamber, to discharge all liquid in the first chamber, and maintain in dynamic gas-liquid fluctuation state, the dynamic gas-liquid fluctuation state refers to that gas in the first chamber can enter the liquid located in the liquid storage tank and located outside the first chamber in the form of bubble through the through hole on the second electrode sheet, so that the liquid located in the liquid storage tank and located outside the first chamber is constantly shaken, and part of liquid can enter the first chamber through the through hole on the second electrode sheet in the process of shaking;Then open the AC power supply, form plasma by ionizing air in the first chamber, the second electrode sheet directly activates the liquid entering the first chamber, and the gas rich in plasma in the first chamber diffuses into the liquid storage tank, to indirectly activate the liquid in the liquid storage tank, until the plasma activated water of high activation degree is prepared.

[0020] The utility model has achieved the following technical effects relative to prior art:

[0021] The preparation device of low temperature plasma activated water directly activates water body in the first chamber, which can reduce the loss of activated substance, improve activation efficiency, increase the composition and concentration of species in plasma activated water, and form dynamic gas-liquid fluctuation interface near the second electrode sheet due to the gas in the first chamber constantly entering the liquid in the form of bubble through the through hole on the second electrode sheet in the ionization process, the existence of dynamic gas-liquid fluctuation interface can cause water body to shake and enter the first chamber through the through hole on the second electrode sheet to update the water participating in direct activation, thereby improving the activation efficiency of all water in the liquid storage tank;The gas rich in plasma diffusing into water body in the form of bubble can indirectly activate water located in the liquid storage tank but outside the first chamber, the amount of indirectly activated water is relatively large, which can increase gas-liquid mixing efficiency and further improve the activation efficiency of all water in the liquid storage tank.

[0022] Further, the area of the first electrode sheet and the second electrode sheet can be set relatively large, a large-area plasma generation area is provided, and the preparation efficiency is improved.

[0023] Further, the cooling unit carries away the heat generated by the combined sheet, prevents the first dielectric sheet and the second dielectric sheet from overheating, improves the stability of the plasma ionization operation, reduces the temperature of the gas-liquid mixing area, reduces the loss of active ingredients in the plasma-activated water, helps to reduce the temperature of the plasma-activated water, and improves the solubility of the active substances. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0025] Fig. 1 is a structural schematic view of the low-temperature plasma-activated water preparation device of the present application;

[0026] Fig. 2 is a partial structural schematic view of the low-temperature plasma-activated water preparation device of the present application;

[0027] Fig. 3 is a partial structural schematic view of the low-temperature plasma-activated water preparation device of the present application;

[0028] Fig. 4 is a partial structural schematic view of the low-temperature plasma-activated water preparation device of the present application;

[0029] In the figure: 1, liquid storage tank; 2, first liquid inlet; 3, first liquid outlet; 4, gas outlet; 5, second liquid inlet; 6, second liquid outlet; 7, wire passage; 8, heat absorption water tank; 9, third liquid inlet; 10, third liquid outlet; 11, first dielectric sheet; 12, second dielectric sheet; 13, second electrode sheet; 14, second air hole; 15, through hole; 16, first electrode sheet; 17, first air hole; 18, enclosing wall. DETAILED DESCRIPTION

[0030] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0031] The utility model discloses a kind of low-temperature plasma activated water preparation devices, to solve the problems existing in the prior art described above, improve the preparation efficiency of low-temperature plasma activated water.

[0032] To make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Embodiment one

[0034] As shown in Figs. 1 to 4 The utility model discloses a kind of low-temperature plasma activated water preparation devices, comprising:

[0035] Liquid storage tank 1, liquid storage tank 1 is transparent, first liquid inlet 2, first liquid outlet 3 and gas outlet 4 are provided on liquid storage tank 1;

[0036] Preparation unit, preparation unit includes combination sheet, second electrode sheet 13 and enclosure wall 18, combination sheet includes first dielectric sheet 11, first electrode sheet 16 and second dielectric sheet 12 sequentially adhered from top to bottom, the edge of first dielectric sheet 11 and second dielectric sheet 12 is more than the edge of first electrode sheet 16 Out, and combination sheet further includes the insulating sealing ring (not shown in the figure) for the edge of first electrode sheet 16 is wrapped and sealed;Enclosure wall 18 is insulating and transparent, the top end of enclosure wall 18 is sealedly connected with the bottom surface of second dielectric sheet 12, the bottom end is sealedly connected with the top surface of second electrode sheet 13, and first chamber is formed between second dielectric sheet 12, enclosure wall 18 and second electrode sheet 13;Second electrode sheet 13 is provided with a plurality of through holes 15 communicated with first chamber, first air hole 17 is provided on enclosure wall 18, and second air hole 14 communicated with first air hole 17 through first connecting pipe is provided on the side wall of liquid storage tank 1;Second electrode sheet 13, enclosure wall 18 are all arranged in liquid storage tank 1;Second electrode sheet 13 and combination sheet have interval between at least one side edge and the inner wall of liquid storage tank 1, and the bottom surface of second electrode sheet 13 has interval with the bottom surface of liquid storage tank 1;First electrode sheet 16 is electrically connected with the live wire of alternating current power supply, second electrode sheet 13 is electrically connected with the zero line of alternating current power supply, and the connecting wire between second electrode sheet 13 and zero line passes through through wire port 7 on liquid storage tank 1, it is worth mentioning that the connecting wire between second electrode sheet 13 and zero line needs to use waterproof wire;

[0037] The air injection unit adopts an air pump, and the air outlet 4 of the air pump is communicated with the second air hole 14 through a second connecting pipe.

[0038] It is worth mentioning that, in the present embodiment, AC power is used instead of DC power because the use of DC power will result in a lower efficiency of plasma generation by the electric field between the first electrode sheet 16 and the second electrode sheet 13, while the use of AC power can achieve a higher ionization efficiency, thereby facilitating the improvement of the preparation efficiency of low-temperature plasma-activated water.

[0039] The low-temperature plasma-activated water preparation device of the present embodiment can reduce the loss of activated substances and improve the activation efficiency by directly activating the water body in the first chamber, increase the species composition and concentration of the plasma-activated water, and the dynamic gas-liquid fluctuating interface existing in the first chamber during the ionization process helps to update the directly activated water body. The gas discharged from the perforated electrode diffuses into the water body in the form of small bubbles to indirectly activate the water body, increase the gas-liquid mixing efficiency, and further improve the activation efficiency of the water body.

[0040] It is worth mentioning that, in the present embodiment, the outer wall of the surrounding wall 18 and the inner wall of the liquid storage tank 1 are spaced apart to facilitate the flow of the liquid in the liquid storage tank 1 to the bottom of the liquid storage tank 1. In addition, the area of the first electrode sheet 16 and the second electrode sheet 13 can be set as large as possible to increase the ionization area and thereby improve the preparation efficiency.

[0041] In an optional scheme of the present embodiment, the cooling unit preferably further includes a radiator arranged outside the liquid storage tank 1, a water pump arranged outside the liquid storage tank 1, and a heat-absorbing water tank 8 arranged inside the liquid storage tank 1, the heat-absorbing water tank 8 being closed and the first medium sheet 11 serving as the bottom plate of the heat-absorbing water tank 8; the liquid storage tank 1 is provided with a second liquid inlet 5 and a second liquid outlet 6, the heat-absorbing water tank 8 is provided with a third liquid inlet 9 and a third liquid outlet 10, the outlet of the water pump, the second liquid inlet 5, and the third liquid inlet are sequentially communicated, the third liquid outlet 10, the second liquid outlet 6, and the liquid inlet of the radiator are sequentially communicated, and the liquid outlet of the radiator is communicated with the liquid inlet of the water pump; the heating heat of the combined sheet is taken away by the cooling unit to avoid overheating of the first medium sheet 11 and the second medium sheet 12, improve the stability of the plasma ionization work, reduce the temperature of the gas-liquid mixing area, reduce the loss of active ingredients in the plasma-activated water, help to reduce the temperature of the plasma-activated water, and improve the solubility of the active substances.

[0042] In the embodiment, the side wall of the heat-absorbing water tank 8 is integrally formed with the surrounding wall 18. In addition, the first medium sheet 11 serves as the bottom plate of the heat-absorbing water tank 8, i.e. the upper surface of the first medium sheet 11 serves as the lower surface of the heat-absorbing water tank 8, which helps to reduce the heating temperature of the first medium sheet 11 and even the combined sheet, and improve the long-time working stability of discharge.

[0043] In the alternative embodiment, preferably, the first medium sheet 11 and the second medium sheet 12 both extend out of the liquid storage tank 1 at two ends, and the first medium sheet 11 and the second medium sheet 12 are respectively in sealed connection with the liquid storage tank 1. In this way, the first medium sheet 11 and the second medium sheet 12 are both partially located in the liquid in the liquid storage tank 1, and the first medium sheet 11 and the second medium sheet 12 are both divided into a cooling zone-ionization activation zone-cooling zone, which is conducive to reducing the temperature of the first medium sheet 11 and the second medium sheet 12.

[0044] In the alternative embodiment, preferably, the heat sink is a finned heat sink, which is a mature commercial product and has high heat dissipation efficiency.

[0045] In the alternative embodiment, preferably, the first medium sheet 11, the first electrode sheet 16 and the second medium sheet 12 are sequentially bonded, and the first medium sheet 11 and the second medium sheet 12 are respectively in sealed connection with the insulating sealing ring. The insulating sealing ring can prevent the liquid in the liquid storage tank 1 from directly contacting the first electrode sheet 16 to cause short circuit.

[0046] In the alternative embodiment, preferably, the surrounding wall 18 is in the shape of a rectangular cylinder; in actual application, the surrounding wall 18 can also be in the shape of a cylinder or other shapes according to actual needs.

[0047] In the alternative embodiment, preferably, the first medium sheet 11, the first electrode sheet 16, the second medium sheet 12 and the second electrode sheet 13 are parallel to each other.

[0048] In the alternative embodiment, preferably, the first gas hole 17 is higher than the second electrode sheet 13, and there is no other gas flow passage in the first chamber, which prevents the liquid in the first chamber from directly contacting the second medium sheet 12, improves the safety during high-voltage discharge, and effectively avoids the discharge sparking phenomenon caused by the connection between water and electrodes during the preparation of activated water by underwater discharge.

[0049] In the alternative embodiment, preferably, the first medium sheet 11 and the second medium sheet 12 are made of quartz or glass; the first electrode sheet 16 and the second electrode sheet 13 are made of aluminum, copper or stainless steel; and the materials of the liquid storage tank 1, the surrounding wall 18 and the heat-absorbing water tank 8 except the first medium sheet 11 are all acrylic.

[0050] The surface array of the second electrode sheet 13 is in direct contact with the liquid in the liquid storage tank 1 through a plurality of through holes 15, and the through holes 15 are dynamically filled with water and directly contact the plasma. At the same time, the small through holes 15 as the gas outlet 4 can quickly blow the plasma-activated gas into the gas-liquid mixing area to form dense and uniform bubbles to improve the gas-liquid mixing efficiency.

[0051] Embodiment two

[0052] The embodiment provides a low-temperature plasma-activated water preparation method based on the low-temperature plasma-activated water preparation device in embodiment one, in particular:

[0053] The liquid to be activated is injected into the liquid storage tank 1 through the first liquid inlet 2, and then the air pump is started to inject air into the first chamber to completely discharge the liquid in the first chamber and maintain a dynamic gas-liquid fluctuation state. The dynamic gas-liquid fluctuation state refers to that the gas in the first chamber can enter the liquid located in the liquid storage tank 1 and outside the first chamber in the form of bubbles through the through holes 15 on the second electrode sheet 13, so that the liquid located in the liquid storage tank 1 and outside the first chamber is constantly shaken, and part of the liquid can enter the first chamber through the through holes 15 on the second electrode sheet 13 during the shaking process. Then, the alternating current power supply is started, the plasma is formed by ionizing the air in the first chamber, the second electrode sheet 13 directly activates the liquid entering the first chamber, and the gas rich in plasma in the first chamber diffuses into the liquid storage tank 1 to indirectly activate the liquid in the liquid storage tank 1, until the plasma-activated water with high activation degree is prepared.

[0054] In the preparation process of the low-temperature plasma-activated water preparation method of the embodiment, the direct activation of the water in the first chamber can reduce the loss of activated substances, improve the activation efficiency, increase the species composition and concentration of the plasma-activated water, and the gas in the first chamber continuously enters the liquid in the form of bubbles through the through holes 15 on the second electrode sheet 13 during the ionization process, so that a dynamic gas-liquid fluctuation interface (i.e. the interface through which water enters the first chamber through the through holes 15 in the dynamic gas-liquid fluctuation state) is formed near the second electrode sheet 13. The existence of the dynamic gas-liquid fluctuation interface can cause the water that enters the first chamber through the through holes 15 on the second electrode sheet 13 to update the water that participates in direct activation due to the shaking of the water, thereby improving the activation efficiency of all the water in the liquid storage tank 1. The gas rich in plasma diffused into the water in the form of bubbles can indirectly activate the water located in the liquid storage tank 1 but outside the first chamber, the amount of indirectly activated water is large, which can improve the gas-liquid mixing efficiency and further improve the activation efficiency of all the water in the liquid storage tank 1.

[0055] The liquid storage tank 1, the surrounding wall 18 and the heat absorbing water tank 8 are transparent, so that the plasma generated in the first chamber can be conveniently observed, and the mixing state of the plasma gas when the plasma gas is blown into the water body through the through holes 15 on the second electrode sheet 13 can be observed, and whether the dynamic gas-liquid fluctuation state is formed can be judged by observing whether the dynamic gas-liquid interface is formed.

[0056] The principle and implementation mode of the utility model are described by applying specific examples in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A device for producing low-temperature plasma-activated water, characterized in that, The utility model provides a kind of electrolytic water generator, including: Liquid storage tank, the liquid storage tank is transparent, first liquid inlet, first liquid outlet and gas outlet are provided on the liquid storage tank; Preparation unit, the preparation unit includes combination sheet, second electrode sheet and enclosure wall, the combination sheet includes first dielectric sheet, first electrode sheet and second dielectric sheet sequentially adhered from top to bottom, the edge of the first dielectric sheet and the second dielectric sheet are all more outside than the edge of the first electrode sheet, and the combination sheet further includes insulating sealing ring for the edge of the first electrode sheet is wrapped and sealed;The enclosure wall is insulating and transparent, the top end of the enclosure wall is sealedly connected with the bottom surface of the second dielectric sheet, the bottom end is sealedly connected with the top surface of the second electrode sheet, and the first cavity is formed between the second dielectric sheet, the enclosure wall and the second electrode sheet;A plurality of through holes are provided on the second electrode sheet and communicated with the first cavity, a first air hole is provided on the enclosure wall, and a second air hole is provided on the side wall of the liquid storage tank and communicated with the first air hole through a first connecting pipe;The second electrode sheet and the enclosure wall are all arranged in the liquid storage tank;The second electrode sheet and the combination sheet are both at least one side edge and the inner wall of the liquid storage tank have interval, and the bottom surface of the second electrode sheet and the bottom surface of the liquid storage tank have interval;The first electrode sheet is electrically connected with the live wire of alternating current power supply, and the second electrode sheet is electrically connected with the zero line of the alternating current power supply; Gas injection unit, the gas injection unit uses air pump, and the air outlet of the air pump is communicated with the second air hole through a second connecting pipe.

2. The low-temperature plasma-activated water preparation device according to claim 1, characterized by: Further including cooling unit, the cooling unit includes radiator arranged outside the liquid storage tank, water pump arranged outside the liquid storage tank and heat absorption water tank arranged in the liquid storage tank, the heat absorption water tank is closed and the first dielectric sheet serves as the bottom plate of the heat absorption water tank; Second liquid inlet and second liquid outlet are provided on the liquid storage tank, third liquid inlet and third liquid outlet are provided on the heat absorption water tank, the liquid outlet of the water pump, the second liquid inlet and the third liquid inlet are sequentially communicated, the third liquid outlet, the second liquid outlet and the liquid inlet of the radiator are sequentially communicated, and the liquid outlet of the radiator is communicated with the liquid inlet of the water pump.

3. The low-temperature plasma-activated water producing device according to claim 1, characterized by: The first dielectric sheet and the second dielectric sheet both extend out of the liquid storage tank at both ends respectively, and the first dielectric sheet and the second dielectric sheet are respectively sealedly connected with the liquid storage tank.

4. The low-temperature plasma-activated water producing device according to claim 2, characterized by: The radiator uses finned radiator.

5. The low-temperature plasma-activated water producing device according to claim 1, characterized by: The first dielectric sheet, the first electrode sheet and the second dielectric sheet are sequentially bonded, and the first dielectric sheet and the second dielectric sheet are respectively sealedly connected with the insulating sealing ring.

6. The low-temperature plasma-activated water producing device according to claim 1, characterized by: The enclosure wall is rectangular cylindrical.

7. The low-temperature plasma-activated water generating device according to claim 1, characterized by: The first dielectric sheet, the first electrode sheet, the second dielectric sheet and the second electrode sheet are parallel to each other.

8. The low-temperature plasma-activated water generating device according to claim 1, characterized by: The first air hole is higher than the second electrode sheet.

9. The low-temperature plasma-activated water producing device according to claim 2, characterized by: The material of the first dielectric sheet and the second dielectric sheet is quartz or glass;The material of the first electrode sheet and the second electrode sheet is aluminum, copper or stainless steel;The material of the liquid storage tank, the enclosure wall and the heat absorption water tank except the part of the first dielectric sheet is acrylic.

Images