CN-120058090-B - Low-temperature plasma activated water preparation device and method

CN120058090BCN 120058090 BCN120058090 BCN 120058090BCN-120058090-B

Abstract

The invention discloses a low-temperature plasma activated water preparation device and method, which relate to the technical field of plasma activated water preparation and comprise a transparent liquid storage tank, wherein a first liquid inlet, a first liquid outlet and a gas outlet are formed in the transparent liquid storage tank, a preparation unit comprises a combined sheet, a second electrode sheet and a rectangular cylindrical insulating transparent surrounding wall, the combined sheet sequentially comprises a first dielectric sheet, a first electrode sheet and a second dielectric sheet from top to bottom, a first cavity is formed between the first dielectric sheet and the second dielectric sheet, and the first cavity is communicated through a connecting pipe and the like. A cooling unit comprising a radiator, a water pump, a heat-absorbing water tank and the like can be also provided. The method of the invention is to inject liquid into the liquid storage tank, the gas injection unit starts an alternating current power supply after injecting gas into the first chamber, and plasma is formed by ionizing air, thus realizing direct and indirect activation of liquid. The device and the method can improve the activation efficiency, increase the concentration of active substances, stabilize ionization operation of the cooling unit, reduce the loss of active ingredients, and have remarkable advantages.

Inventors

DING TIAN
CHEN XINGYU
LIAO XINYU
FENG JINSONG
JI FEIHONG
SUN YUHAO

Assignees

浙江大学长三角智慧绿洲创新中心

Dates

Publication Date: 20260512
Application Date: 20250319

Claims (10)

1. A low temperature plasma activated water production apparatus, comprising: The liquid storage tank is transparent, and a first liquid inlet, a first liquid outlet and an air outlet are formed in the liquid storage tank; The preparation unit comprises a combined sheet, a second electrode sheet and a surrounding wall, wherein the combined sheet comprises a first dielectric sheet, a first electrode sheet and a second dielectric sheet which are sequentially attached from top to bottom, the edges of the first dielectric sheet and the second dielectric sheet are all close to the outer edge of the first electrode sheet, the combined sheet further comprises an insulating sealing ring used for wrapping and sealing the edge of the first electrode sheet, the surrounding wall is insulating and transparent, the top end of the surrounding wall is in sealing connection with the bottom surface of the second dielectric sheet, the bottom end of the surrounding wall is in sealing connection with the top surface of the second electrode sheet, a first cavity is formed among the second dielectric sheet, the surrounding wall and the second electrode sheet, a plurality of through holes communicated with the first cavity are formed in the second electrode sheet, a first vent hole is formed in the side wall of the liquid storage box, the second vent hole is communicated with the first vent hole through a first connecting pipe, the second electrode sheet and the liquid storage box are all arranged in the liquid storage box, the top end of the surrounding wall is in sealing connection with the bottom surface of the second dielectric sheet, and the top surface of the second electrode sheet is connected with an alternating current power supply, and the first electrode sheet is in a space between the bottom surface of the second electrode sheet and the top surface of the combined electrode sheet is provided with an alternating current power supply; and the air injection unit adopts an air pump, and an air outlet of the air pump is communicated with the second ventilation hole through a second connecting pipe.
2. The apparatus of claim 1, wherein the apparatus further comprises a cooling unit including a radiator disposed outside the liquid storage tank, a water pump disposed outside the liquid storage tank, and a heat absorption water tank disposed inside the liquid storage tank, the heat absorption water tank being sealed and the first medium sheet being a bottom plate of the heat absorption water tank; be provided with second inlet and second liquid outlet on the liquid reserve tank, be provided with third inlet and third liquid outlet on the heat absorption water tank, the liquid outlet of water pump the second inlet with the third liquid inlet communicates in proper order, third liquid outlet, second liquid outlet reaches the inlet of radiator communicates in proper order, the liquid outlet of radiator with the inlet intercommunication of water pump.
3. The apparatus of claim 1, wherein the first and second sheets of medium extend from the tank at opposite ends of the first and second sheets of medium, respectively, and the first and second sheets of medium are sealingly connected to the tank, respectively.
4. The apparatus of claim 2, wherein the heat sink is a fin type heat sink.
5. The apparatus of claim 1, wherein 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 and hermetically connected with the insulating seal ring.
6. The apparatus for preparing activated water by low-temperature plasma according to claim 1, wherein the surrounding wall has a rectangular cylindrical shape.
7. The apparatus of claim 1, wherein the first dielectric sheet, the first electrode sheet, the second dielectric sheet, and the second electrode sheet are parallel to each other.
8. The apparatus of claim 1, wherein the first vent hole is higher than the second electrode piece.
9. The low-temperature plasma activated water preparation device according to claim 2, wherein the first dielectric sheet and the second dielectric sheet are made of quartz or glass, the first electrode sheet and the second electrode sheet are made of aluminum, copper or stainless steel, and the liquid storage tank, the surrounding wall and the heat absorption water tank are made of acrylic materials except the first dielectric sheet.
10. A low-temperature plasma activated water preparation method is characterized in that liquid to be activated is injected into a liquid storage tank through a first liquid inlet, then air is injected into a first cavity through a gas pump so as to completely discharge the liquid in the first cavity, the dynamic gas-liquid fluctuation state is that gas in the first cavity can enter the liquid storage tank in the form of bubbles in the liquid located outside the first cavity through a through hole on a second electrode plate, the liquid located in the liquid storage tank continuously oscillates, part of the liquid can enter the first cavity through a through hole on the second electrode plate in the oscillation process, then an alternating current power supply is started, plasma is formed through ionizing the air in the first cavity, the second electrode plate directly activates the liquid entering the first cavity, the liquid in the liquid storage tank is enriched in the liquid in the first cavity, and the liquid is activated until the liquid is activated in the plasma preparation tank, and the liquid is activated until the liquid is high in the plasma preparation degree.

Description

Low-temperature plasma activated water preparation device and method Technical Field The invention relates to the technical field of plasma activated water preparation, in particular to a low-temperature plasma activated water preparation device and method. Background The low-temperature plasma activated water is used as a solution rich in complex active substances, contains ozone, hydroxyl radicals, hydrogen peroxide and the like, and has broad-spectrum sterilization capability on bacterial microorganisms. The technology has high sterilization efficiency, small influence on food quality, green and no residue, and has remarkable advantages. In the field of foods, the plasma activated water is utilized to spray or soak and clean the foods, so that the colony number of pathogenic microorganisms such as escherichia coli, salmonella and the like can be effectively reduced, the fresh-keeping period of the foods is further prolonged, and the method has a wide application prospect. However, the prior art has a number of disadvantages in preparing plasma activated water. In the technology of directly treating water body, such as water jet and dielectric barrier discharge treatment, the problems of small activation area, lack of fluidity of the activated water body, small activated water amount and the like exist. The indirect treatment technology has the characteristic of large activated water quantity, but is similar to the underwater single-medium quartz tube internal discharge technology, and the plasma cannot directly contact with the water body, so that more active ingredients are lost, and the activation efficiency is low. The traditional underwater plasma discharge technology is excessively dependent on the plasma excitation effect of a local area when treating the water body, so that other parts in the water body are difficult to fully treat, and particularly when the water body treatment requirement is met, uniform and efficient water body treatment cannot be realized, and the large-scale application and popularization of the low-temperature plasma activated water technology are severely limited. Disclosure of Invention The invention aims to provide a low-temperature plasma activated water preparation device and a method thereof, which are used for solving the problems in the prior art and improving the preparation efficiency of low-temperature plasma activated water. In order to achieve the above object, the present invention provides the following solutions: the invention provides a low-temperature plasma activated water preparation device, which comprises: The liquid storage tank is transparent, and a first liquid inlet, a first liquid outlet and an air outlet are formed in the liquid storage tank; The preparation unit comprises a combined sheet, a second electrode sheet and a surrounding wall, wherein the combined sheet comprises a first dielectric sheet, a first electrode sheet and a second dielectric sheet which are sequentially attached from top to bottom, the edges of the first dielectric sheet and the second dielectric sheet are all close to the outer edge of the first electrode sheet, the combined sheet further comprises an insulating sealing ring used for wrapping and sealing the edge of the first electrode sheet, the surrounding wall is insulating and transparent, the top end of the surrounding wall is in sealing connection with the bottom surface of the second dielectric sheet, the bottom end of the surrounding wall is in sealing connection with the top surface of the second electrode sheet, a first cavity is formed among the second dielectric sheet, the surrounding wall and the second electrode sheet, a plurality of through holes communicated with the first cavity are formed in the second electrode sheet, a first vent hole is formed in the side wall of the liquid storage box, the second vent hole is communicated with the first vent hole through a first connecting pipe, the second electrode sheet and the liquid storage box are all arranged in the liquid storage box, the top end of the surrounding wall is in sealing connection with the bottom surface of the second dielectric sheet, and the top surface of the second electrode sheet is connected with an alternating current power supply, and the first electrode sheet is in a space between the bottom surface of the second electrode sheet and the top surface of the combined electrode sheet is provided with an alternating current power supply; and the air injection unit adopts an air pump, and an air outlet of the air pump is communicated with the second ventilation hole through a second connecting pipe. 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 absorption water tank arranged in the liquid storage tank, wherein the heat absorption water tank is airtight, and the first medium sheet is used as a bottom plate of the heat absorption water ta