CN115918834A - Water-cooled plasma liquid food processing device based on dielectric barrier discharge - Google Patents
Water-cooled plasma liquid food processing device based on dielectric barrier discharge Download PDFInfo
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Abstract
The invention discloses a water-cooled plasma liquid food processing device based on dielectric barrier discharge, which comprises a high-voltage power supply, an air supply system, a product box and a discharge assembly, wherein the high-voltage power supply is connected with the product box; the discharge assembly comprises a coaxial medium pipe, a high-voltage electrode and a high-voltage electrode water-cooling channel; the high-voltage electrode water-cooling channel is arranged in the coaxial medium tube, and the high-voltage electrode is arranged on the outer wall of the high-voltage electrode water-cooling channel and is attached to the outer wall of the high-voltage electrode water-cooling channel; the gas supply system is communicated with the gas inlet of the coaxial medium pipe; the outer wall of the coaxial medium pipe is at least provided with an air outlet; the plurality of air outlets can be provided with microporous aeration devices; the discharge assembly may be plural. The water-cooled plasma liquid food processing device based on dielectric barrier discharge can improve the plasma generation efficiency and the product processing capacity to meet the industrial application of liquid food.
Description
Technical Field
The invention relates to the technical field of non-thermal sterilization of food, in particular to a water-cooled plasma liquid food processing device based on dielectric barrier discharge.
Background
Liquid foods such as fruit juice, milk, etc. are rich in nutrients and are good culture media for microorganisms. The liquid food also contains enzymes, such as polyphenol oxidase (PPO) and Peroxidase (POD) in apple, which can cause oxidative browning of apple juice and reduce nutritional quality and sensory quality of the juice. Therefore, in order to reduce the number of pathogenic bacteria and spoilage bacteria in food and prolong the shelf life of the food, the technology for assisting food safety and sterilizing and inactivating enzymes is very important. The traditional heat sterilization technology (such as pasteurization, pressure steam sterilization and the like) still dominates in the processing of liquid food, but the technology can destroy the original color, aroma, taste and shape of the food, easily cause the decomposition of heat-sensitive components and the loss of volatile components, and can generate adverse effects on the sensory quality, physicochemical property and nutritional components of the product, and can not meet the requirements of modern food processing.
The food industry is adopting new non-thermal food processing technologies. The low-temperature plasma technology is a novel high-efficiency non-heat source sterilization technology, and is receiving more and more attention in the field of food sterilization. Low temperature plasma technology uses charged, highly reactive gas molecules and substances to rapidly react with contaminating microorganisms on food and packaging materials at ambient temperatures without leaving any known chemical residues. In recent years, the method has been applied to food storage and preservation, particularly to killing pathogenic microorganisms on the surfaces of food raw materials such as fruits, vegetables and meat so as to prolong the shelf life of the food raw materials. However, the research and application of the technology in liquid food are rarely reported.
Dielectric barrier discharge is a common method for generating low-temperature plasma, and is mainly characterized in that at least one electrode surface is covered by an insulating medium or an insulating medium is inserted into a discharge space, and when a high enough alternating current or pulse voltage is applied to two ends of a discharge electrode, gas between the electrodes is broken down to form discharge. The existence of the insulating medium inhibits the excessive increase of the discharge current, thereby avoiding the transition of discharge to spark discharge or arc discharge and finally forming stable low-temperature non-equilibrium plasma under atmospheric pressure.
The generation efficiency and the product treatment capacity of the dielectric barrier discharge plasma are the key in application, and the improvement of the generation efficiency and the product treatment capacity of the low-temperature plasma has direct influence on practical application. Although the generation efficiency of plasma can be improved by some means in laboratory research, the methods mainly aim at a dielectric barrier discharge structure with a small area in laboratory research, and the sample processing amount cannot be matched with the application of the food industry. In addition, the dielectric barrier discharge generator generates heat in practical application, consumes energy of a part of power supply to a certain extent, reduces energy supply of dielectric barrier discharge for generating low-temperature plasma, and also reduces plasma generation efficiency. If the temperature of the discharge space is too high, the decomposition rate of active substances generated by discharge in the discharge space is too high, and the active substances for sterilizing and inactivating enzymes are reduced, so that the efficiency of sterilizing and inactivating enzymes is influenced. Therefore, there is a need to improve the design of the dbd plasma generator to improve the plasma generation efficiency and the product throughput.
Disclosure of Invention
The invention aims to overcome the problem that the generation efficiency and the product treatment capacity of active substances in the existing plasma technology cannot meet the industrial application of liquid food, and provides a water-cooled plasma liquid food treatment device based on dielectric barrier discharge, which can improve the generation efficiency and the product treatment capacity of plasma to meet the industrial application of liquid food.
The purpose of the invention is realized by the following technical scheme:
a water-cooled plasma liquid food processing device based on dielectric barrier discharge comprises a high-voltage power supply, an air supply system, a product box and a discharge assembly; the discharge assembly comprises a coaxial medium pipe, a high-voltage electrode and a high-voltage electrode water-cooling channel;
the high-voltage electrode water-cooling channel is arranged in the coaxial medium tube, and the high-voltage electrode is arranged on the outer wall of the high-voltage electrode water-cooling channel and is attached to the outer wall of the high-voltage electrode water-cooling channel;
the air supply system is communicated with an air inlet of the coaxial medium pipe; the outer wall of the coaxial medium pipe is at least provided with an air outlet;
the high-voltage power supply is electrically connected with the high-voltage electrode;
the discharge assembly is installed in the product box.
Preferably, the high voltage electrode is tubular.
Preferably, the high-voltage electrode is a metal spiral ring, a metal mesh cylinder or a metal cylinder.
Preferably, the high-voltage electrode water-cooling channel, the coaxial medium pipe and the central shaft of the high-voltage electrode are coaxial.
Preferably, the plurality of air outlets are provided with microporous aeration devices.
Preferably, the microporous aeration device is a microporous aeration disc, a microporous aeration head or a microporous aeration pipe.
Further, the material of the product box is a conductor or an insulating material;
when the product box is made of a conductor, the product box is simultaneously used as a grounding electrode; when the material of the product box is an insulating material, the liquid food to be treated in the product box is used as a liquid electrode.
Preferably, the high-voltage electrode water-cooling channel is a double-layer mechanism, and the outer layer of the high-voltage electrode water-cooling channel is an insulating layer quartz tube.
Preferably, the discharge assembly is plural.
Preferably, the air outlets are multiple, and the interval between the air outlets is larger than 0cm and smaller than 10cm.
Furthermore, the product box is externally connected with an automatic exhaust valve, and gas in the product box is exhausted according to requirements.
Furthermore, the product box is used for containing liquid food to be treated, and is internally connected with a grounding electrode lead wire, wherein the grounding electrode lead wire needs to be arranged below the liquid level and can be arranged at the bottom, the side surface or suspended in water.
Further, the water-cooled atmospheric pressure plasma liquid food processing device based on dielectric barrier discharge also comprises a water pump and a water tank; and a liquid inlet of the high-voltage electrode water cooling channel is connected with an output end of the water pump, an input end of the water pump is connected with a water outlet of the water tank, and a water inlet of the water tank is connected with a liquid outlet of the water circulation conduit, so that a water circulation heat dissipation system is formed.
Further, the liquid food is fruit juice, vegetable juice, or milk.
Further, the working gas can be one or more of helium, argon, nitrogen, oxygen or air, and the flow velocity of the gas flow is more than 0m/s and less than 120m/s.
Further, the high-voltage power supply can be a high-voltage sine wave power supply or a high-voltage pulse power supply.
Furthermore, the voltage amplitude of the high-voltage sine wave power supply and the high-voltage pulse power supply is 10kV to 80kV, and the repetition frequency is 10 Hz to 10000Hz.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) According to the water-cooled atmospheric pressure plasma liquid food processing device based on dielectric barrier discharge, the high-voltage electrode is tightly attached to the outer wall of the water-cooling channel of the high-voltage electrode, the temperature of a discharge space is reduced through water cooling, meanwhile, as the discharge assembly is positioned in the product box, the discharge system is cooled by the liquid food to be processed, internal and external double water cooling is realized, the heat dissipation condition of a generator is optimized, the pyrolysis of active substances is inhibited, and the yield of the active substances is improved.
(2) The water-cooled atmospheric pressure plasma liquid food treatment device based on dielectric barrier discharge adopts the micropore aeration device, and the gas flowing out of the discharge space is divided into a large number of uniform micro bubbles through micropores on the surface of the aeration device, so that the transfer efficiency of active substances is improved, the gas-liquid phase mass transfer efficiency is enhanced, and the utilization efficiency of the active substances generated by discharge is improved.
(3) According to the water-cooled atmospheric pressure plasma liquid food treatment device based on dielectric barrier discharge, the discharge assembly is integrally placed in the product box, the discharge assembly is cooled by the product, and the temperature of the discharge space is reduced due to low circulating flow temperature of liquid food.
(4) The water-cooled atmospheric pressure plasma liquid food treatment device based on dielectric barrier discharge can be used for intermittent liquid food treatment, can also be externally connected with a transmission and distribution system for continuous liquid food treatment, and can adapt to various requirements of industrial production of liquid food.
Drawings
Fig. 1 is a schematic structural diagram of a water-cooled atmospheric pressure plasma liquid food processing device based on dielectric barrier discharge.
In the figure: 1. the gas cylinder, 2, a flowmeter, 3, a valve, 4, a gas inlet, 5, a liquid inlet, 6, a product box, 7, an automatic exhaust valve, 8, an aeration device, 9, a gas outlet, 10, a coaxial medium pipe, 11, a high-voltage electrode, 12, a high-voltage electrode water cooling channel, 13, a liquid outlet, 14, a high-voltage power supply, 15, a grounding electrode lead, 16, a water tank, 17 and a water pump.
FIG. 2 is a graph showing H in examples 1 to 3 of the present invention and comparative examples 1 to 3 of a liquid-treated sample 2 O 2 Graph of content versus time.
FIG. 3 is a graph showing liquid-treated samples in examples 1 to 3 of the present invention and comparative examples 1 to 3
Graph of content versus time.
FIG. 4 is a graph showing liquid-treated samples in examples 1 to 3 of the present invention and comparative examples 1 to 3
Graph of content versus time.
FIG. 5 is a graph showing liquid-treated samples in examples 1 to 3 of the present invention and comparative examples 1 to 3
Graph of content versus time.
Fig. 6 is a schematic view of the structure of an atmospheric pressure plasma jet device in comparative example 3 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
The structural schematic diagram of the water-cooled atmospheric pressure plasma liquid food processing device based on dielectric barrier discharge provided by the embodiment of the invention is shown in fig. 1, and the device comprises a gas supply system, a product box, a coaxial medium pipe, a high-voltage electrode water-cooling channel and a high-voltage power supply, wherein the gas supply system comprises a gas cylinder, a flowmeter and a valve and provides working gas for the device. The product box is used for containing liquid food to be treated, the grounding electrode lead is connected in the product box, the material of the product box can be conductive material and insulating material, when the material of the product box is conductive material, the product box can be used as the grounding electrode at the same time, and when the material of the product box is insulating material, the liquid food to be treated can be used as the liquid electrode. The coaxial medium pipe is provided with gas outlets with unlimited number, the gas outlets are connected with an aeration device, and the aeration device is a microporous aeration device and can adopt aeration equipment such as an aeration disc, an aeration head, an aeration pipe and the like. The high-voltage electrode water-cooling channel comprises an outer-layer insulating layer quartz tube, an inner-layer water flow passage, an external liquid inlet and a liquid outlet.
The high voltage electrode material is not particularly limited, and may be selected according to the uniformity of discharge, and may be, for example, pure copper, graphite, or steel.
The feeding mode of the product box is not particularly limited, and the product box can meet the actual requirement. Specifically, the device can be used for intermittent liquid food treatment, and can also be externally connected with a transmission and distribution system for continuous liquid food treatment.
Furthermore, the product box is externally connected with an automatic exhaust valve, and gas in the product box is exhausted as required. Specifically, the air outlet valve can be a micro air outlet valve and a large flow automatic air outlet valve, and the air outlet valve is selected according to the specification of industrial production of liquid foods. In the process of debugging or filling liquid food in the system, the acted gas in the product box is naturally driven to the highest point, the automatic exhaust valve can automatically exhaust the gas, and the valve can be automatically closed after the liquid food is filled again.
Furthermore, a group of discharge assemblies can be arranged in the product box, and a plurality of groups of discharge assemblies can also be arranged in the product box. Specifically, it may be 1, 2, 3, or 4, etc., and the number of discharge assemblies is selected according to the product throughput and the product bin space.
Furthermore, the grounding electrode lead wire needs to be arranged below the liquid level and can be arranged at the bottom, the side surface or suspended in water of the product box, if the material of the product box is a conductive material, the product box can be used as a grounding electrode, and if the material of the product box is an insulating material, the liquid food to be treated can be used as a liquid electrode.
The liquid electrode is not particularly limited, and may be a liquid food having conductivity, such as fruit juice, vegetable juice, or milk.
Furthermore, the high-voltage electrode is a metal electrode, is tightly attached to a water-cooling channel of the high-voltage electrode when placed, and can be a spiral ring, a metal mesh cylinder and a metal cylinder. Specifically, as shown in fig. 1, the high voltage electrodes may be metal cylinders, and high voltage electrode leads are added, and the high voltage electrode leads on each high voltage motor are gathered together and connected to an external power supply.
In order to form a uniform dielectric barrier discharge, the working gas may be one or more of helium, argon, nitrogen, oxygen or air, and the flow rate of the gas flow is greater than 0m/s and less than 120m/s. In particular, may be helium, argon, air or 98% Ar +2% 2 。
The material and structure of the coaxial medium pipe are not particularly limited, and further, the coaxial medium pipe may be quartz, ceramic, corundum, or polytetrafluoro material.
Furthermore, the number of the gas outlets is 1 or more, and the interval is 0-10 cm. Specifically, the number of the gas outlets may be 1, 2, 3 or 4, etc., and the number of the gas outlets is selected according to the product throughput and the length of the coaxial medium pipe.
Furthermore, the liquid inlet of the high-voltage electrode water-cooling channel is connected with the output end of the water pump, the input end of the water pump is connected with the water outlet of the water tank, and the water inlet of the water tank is connected with the liquid outlet of the water circulation conduit, so that a water circulation heat dissipation system is formed.
The type of the high voltage power supply is not particularly limited, and the high voltage power supply may be a high voltage sine wave power supply, a high voltage pulse power supply, or the like.
Furthermore, the voltage amplitude of the high-voltage sine wave power supply and the high-voltage pulse power supply is 10kV to 80kV, and the repetition frequency is 10 Hz to 10000Hz.
The present invention will be described in detail below by way of examples. The described embodiments are only a part of application examples of the present invention, and not all examples. The scope of the present invention is not limited to the embodiments, but equivalent modifications or changes made by those skilled in the art according to the present disclosure are within the scope of the present invention.
Example 1
As shown in fig. 1, the water-cooled atmospheric pressure plasma liquid food processing device based on dielectric barrier discharge in one embodiment of the present invention includes a gas supply system, a product box, a coaxial medium pipe, a high voltage electrode water cooling channel and a high voltage power supply, wherein the gas supply system includes a gas cylinder, a flow meter and a valve for supplying helium. Wherein, the product box material is insulating material, and the apple juice to be treated is used as a liquid electrode. The quartz single-layer coaxial medium pipe is provided with 5 gas outlets, the spacing of the gas outlets is 5cm, and the gas outlets are connected with the disc type flat plate aerator. The high-voltage electrode water-cooling channel comprises an outer-layer insulating layer quartz tube, an inner-layer water flow passage, an external liquid inlet and a liquid outlet. The liquid inlet of the high-voltage electrode water-cooling channel is connected with the output end of the water pump, the input end of the water pump is connected with the water outlet of the water tank, and the water inlet of the water tank is connected with the liquid outlet of the water circulation conduit, so that a water circulation heat dissipation system is formed.
In one embodiment of the invention, the top of the product box is externally connected with an automatic exhaust valve, the gas in the product box is exhausted according to requirements, and three groups of discharge assemblies are arranged in the product box. Wherein, the grounding electrode lead is arranged at the bottom of the product box.
In one embodiment of the invention, the high-voltage electrode is a brass metal cylinder which is tightly attached to the outer wall of the water-cooling channel of the high-voltage electrode when being placed, so that the effective cooling of the electrode is ensured. The high-voltage electrode is externally connected with a high-voltage electrode lead, and high-voltage electrode leads on the high-voltage motors are gathered together and connected to a high-voltage pulse power supply.
In one embodiment of the invention, the high-voltage electrode is connected with a high-voltage power supply through a high-voltage electrode lead, the low-voltage electrode is grounded through a ground electrode lead, reaction gas is provided by a gas supply system, enters from a gas inlet on the coaxial medium pipe and passes through a discharge area of dielectric barrier discharge, the high-voltage electrode discharges the reaction gas to generate active substances during the period, and finally the reaction gas and the active substances are discharged into a product box through a gas outlet and an aeration device on the coaxial medium pipe; the cooling water of the high-voltage electrode enters from the liquid inlet of the high-voltage electrode water-cooling channel, the liquid outlet of the high-voltage electrode water-cooling channel is discharged, the liquid inlet of the high-voltage electrode water-cooling channel is connected with the output end of the water pump, the input end of the water pump is connected with the water outlet of the water tank, the water inlet of the water tank is connected with the liquid outlet of the water circulation conduit, a water circulation heat dissipation system is formed, and therefore the high-voltage electrode is cooled.
In one embodiment of the invention, the water-cooled atmospheric pressure plasma liquid food processing device based on the dielectric barrier discharge comprises the following specific operation steps:
(1) Selecting an intermittent liquid food processing feeding mode;
(2) Starting a water circulation heat dissipation system, and starting a water pump to ensure that the water circulation system operates normally;
(3) Regulating the gas flow speed by a valve to 40m/s, introducing helium gas into the discharge gap, and enabling the reaction gas to enter the coaxial medium tube through the gas inlet and flow out of the gas outlet and the aeration device;
(4) And (3) turning on the high-voltage nanosecond pulse power supply, adjusting the voltage amplitude of the nanosecond pulse power supply to be 50kV, and selecting the nanosecond pulse repetition frequency to be 1000Hz to obtain charged and highly-active gas molecules and substances.
The main oxidation active substance in this comparative example
The content changes with time are shown in FIGS. 2 to 5.
Table 1 shows the effect of the water-cooled atmospheric pressure plasma liquid food processing device based on dielectric barrier discharge on the biochemical properties of fresh apple juice in the example of the present invention. It can be seen that the DBD atmospheric plasma liquid food treatment device treatment hardly affected the TSS content, with the pH of the apple juice decreasing and the TA content increasing with the treatment time, indicating the accumulation and conversion of plasma active ingredients in the apple juice. For apple juiceL of * Value (representation of black and white shading), a * (representation of Red and Green), b * (yellow blue representation) values were evaluated separately and longer DBD treatments (180 s and 300 s) could improve the brightness of apple juice.
The water-cooled atmospheric pressure plasma liquid food treatment device based on dielectric barrier discharge can keep the sensory quality, the physicochemical property and the nutritional ingredients of liquid food, thereby meeting the requirements of modern food processing.
TABLE 1
Note: the different letters in the same column of each group indicate significant differences (p < 0.05)
Example 2
The basic device of embodiment 1 is used as the experimental device in embodiment 2, and includes an air supply system, a product box, a coaxial medium pipe, a high-voltage electrode water-cooling channel and a high-voltage power supply. Milk was selected as the treatment sample.
In one embodiment of the invention, the water-cooled atmospheric pressure plasma liquid food processing device based on the dielectric barrier discharge comprises the following specific operation steps:
(1) Selecting an intermittent liquid food processing feeding mode;
(2) Starting a water circulation heat dissipation system, and starting a water pump to ensure that the water circulation system operates normally;
(3) The flow speed of the gas is adjusted by a valve to be 20m/s, nitrogen is introduced into the discharge gap, and the reaction gas enters the coaxial medium tube through the gas inlet and flows out of the gas outlet and the aeration device;
(4) And (3) turning on the high-voltage nanosecond pulse power supply, adjusting the voltage amplitude of the nanosecond pulse power supply to be 40kV, and selecting the nanosecond pulse repetition frequency to be 500Hz to obtain charged and highly-active gas molecules and substances.
The main oxidation active substance in this comparative example
The content changes with time are shown in FIGS. 2 to 5.
Example 3
The basic device of embodiment 1 is adopted as the experimental device in embodiment 3, and includes an air supply system, a product box, a coaxial medium pipe, a high-voltage electrode water-cooling channel and a high-voltage power supply. Carrot juice was selected as the treatment sample.
In one embodiment of the invention, the water-cooled atmospheric pressure plasma liquid food processing device based on the dielectric barrier discharge comprises the following specific operation steps:
(1) Selecting an intermittent liquid food processing feeding mode;
(2) Starting a water circulation heat dissipation system, and starting a water pump to ensure that the water circulation system operates normally;
(3) The gas flow speed is adjusted by a valve to be 60m/s, air is introduced into the discharge gap, and reaction gas enters the coaxial medium tube through the gas inlet and flows out of the gas outlet and the aeration device;
(4) And (3) turning on the high-voltage nanosecond pulse power supply, adjusting the voltage amplitude of the nanosecond pulse power supply to be 60kV, and selecting the nanosecond pulse repetition frequency to be 1500Hz to obtain charged and highly-active gas molecules and substances.
The main oxidation active substance in this comparative example
The content changes with time are shown in FIGS. 2 to 5.
Comparative example 1
The water circulation heat removal system in the apparatus of example 1 was removed and apple juice was selected as the treatment sample as the experimental apparatus in this comparative example. The experiment was carried out according to the following procedure:
(1) Selecting an intermittent liquid food processing feeding mode;
(2) The gas flow speed is adjusted by a valve to be 40m/s, air is introduced into the discharge gap, and reaction gas enters the coaxial medium tube through the gas inlet and flows out of the gas outlet and the aeration device;
(4) And (3) turning on the high-voltage nanosecond pulse power supply, adjusting the voltage amplitude of the nanosecond pulse power supply to be 50kV, and selecting the nanosecond pulse repetition frequency to be 1000Hz to obtain charged and highly-active gas molecules and substances.
The main oxidation active substance in this comparative example
The content changes with time are shown in FIGS. 2 to 5.
Comparative example 2
The electric discharge units of the apparatus of example 1 were set to 1 group, and the aeration apparatus of the apparatus of example 1 was removed to obtain apple juice as a treatment sample as an experimental apparatus of this comparative example. The experiment was carried out according to the following procedure:
(1) Selecting an intermittent liquid food processing feeding mode;
(2) Starting a water circulation heat dissipation system, and starting a water pump to ensure that the water circulation system operates normally;
(3) The gas flow speed is adjusted by a valve to be 40m/s, air is introduced into the discharge gap, and reaction gas enters the coaxial medium tube through the gas inlet and flows out of the gas outlet and the aeration device;
(4) And (3) turning on the high-voltage nanosecond pulse power supply, adjusting the voltage amplitude of the nanosecond pulse power supply to be 60kV, and selecting the nanosecond pulse repetition frequency to be 1500Hz to obtain charged and highly-active gas molecules and substances.
The main oxidation active substance in this comparative example
The content changes with time are shown in FIGS. 2 to 5.
Comparative example 3
The cold source plasma jet device shown in fig. 6 was used as an experimental device in this comparative example, and included a plasma jet reactor assembly, a high voltage power supply, and a gas supply system. Under the conditions that the voltage is 60kV and the frequency is 1500Hz, argon is used as working gas, the gas flow rate is 40m/s, and apple juice is selected as a processing sample.
The main oxidation active substance in this comparative example
The content changes with time are shown in FIGS. 2 to 5.
FIGS. 2 to 5 show the main oxidation active substances of liquid-treated samples in examples 1 to 3 of the present invention and comparative examples 1 to 3
Graph of content versus time. In the figure, the horizontal axis represents the liquid treatment sample treatment time, and the vertical axis represents the concentration of the oxidation active substance. As the DBD plasma treatment time is prolonged, the active component in PAW is H 2 O 2 、/>
Gradually accumulated, and the contents of the three active substances increase with the treatment time, although in PAW
It is very abundant but after 3min of treatment it->
The content will gradually decrease with the treatment time. The concentration of the main active ingredient of the treatment group of the example is increased substantially rapidly as the treatment time is changed, while the comparative example is increased slowly, which shows that the plasma generation efficiency of the water-cooled atmospheric pressure plasma liquid food treatment device based on dielectric barrier discharge of the invention is obviously superior to that of the traditional plasma liquid food treatment device and the traditional water-cooled plasma liquid food treatment device. In addition, the product treatment capacity of the examples 1 to 3 and the comparative example 1 can reach 5 tons/(day), the product treatment capacity of the comparative example 2 can reach 1 ton/(day), the product treatment capacity of the common cold source plasma jet device is only 0.2 ton/(day), and the examples 1 to 3 and the comparative example 1 have significant difference (p is less than 0.05) compared with the comparative example 2 and the comparative example 3, and the table shows thatThe product treatment capacity of the device can meet the requirement of industrial production of food liquid.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A water-cooled plasma liquid food processing device based on dielectric barrier discharge is characterized by comprising a high-voltage power supply, an air supply system, a product box and a discharge assembly; the discharge component comprises a coaxial medium pipe, a high-voltage electrode and a high-voltage electrode water-cooling channel;
the high-voltage electrode water-cooling channel is arranged in the coaxial medium tube, and the high-voltage electrode is arranged on the outer wall of the high-voltage electrode water-cooling channel and is attached to the outer wall of the high-voltage electrode water-cooling channel;
the gas supply system is communicated with the gas inlet of the coaxial medium pipe; the outer wall of the coaxial medium pipe is at least provided with an air outlet;
the high-voltage power supply is electrically connected with the high-voltage electrode;
the discharge assembly is installed in the product box.
2. The water-cooled plasma liquid food treatment device based on dielectric barrier discharge according to claim 1, wherein the high voltage electrode is tubular.
3. The water-cooled plasma liquid food treatment device based on dielectric barrier discharge according to claim 2, wherein the high voltage electrode is a metal spiral ring, a metal mesh cylinder or a metal cylinder.
4. The water-cooled plasma liquid food treatment device based on dielectric barrier discharge according to claim 3, wherein the high voltage electrode water-cooling channel, the coaxial medium pipe and the central axis of the high voltage electrode are coaxial.
5. The water-cooled plasma liquid food treatment device based on dielectric barrier discharge according to claim 1, wherein a micro-hole aeration device is provided on the plurality of air outlets.
6. The water-cooled plasma liquid food treatment device based on dielectric barrier discharge according to claim 4, wherein the micro-porous aeration device is a micro-porous aeration disc, a micro-porous aeration head or a micro-porous aeration pipe.
7. The water-cooled plasma liquid food treatment device based on dielectric barrier discharge according to claim 1, wherein the material of the product tank is conductor or insulating material;
when the material of the product box is a conductor, the product box is simultaneously used as a grounding electrode; when the material of the product box is an insulating material, the liquid food to be treated in the product box is used as a liquid electrode.
8. The water-cooled plasma liquid food processing device based on dielectric barrier discharge according to claim 1, wherein the high voltage electrode water cooling channel is a double-layer mechanism, and the outer layer of the high voltage electrode water cooling channel is an insulating layer quartz tube.
9. The water-cooled plasma liquid food processing device based on dielectric barrier discharge according to claim 1, wherein the discharge assembly is plural.
10. The water-cooled plasma liquid food treatment device based on dielectric barrier discharge according to claim 1, wherein the number of the gas outlets is plural, and the interval between the gas outlets is more than 0cm and less than 10cm.
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| CN108101159A (en) * | 2018-01-15 | 2018-06-01 | 重庆工商大学 | A kind of high-pressure medium barrier discharge plasma wastewater treatment equipment |
| KR101984437B1 (en) * | 2018-12-26 | 2019-05-30 | 김숙 | Water treating apparatus using plasma |
| CN111377399A (en) * | 2018-12-29 | 2020-07-07 | 中国石油化工股份有限公司 | Plasma discharge device and method for decomposing hydrogen sulfide |
| CN113242840A (en) * | 2018-12-14 | 2021-08-10 | Abb瑞士股份有限公司 | Water treatment apparatus and water treatment method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101159A (en) * | 2018-01-15 | 2018-06-01 | 重庆工商大学 | A kind of high-pressure medium barrier discharge plasma wastewater treatment equipment |
| CN113242840A (en) * | 2018-12-14 | 2021-08-10 | Abb瑞士股份有限公司 | Water treatment apparatus and water treatment method |
| KR101984437B1 (en) * | 2018-12-26 | 2019-05-30 | 김숙 | Water treating apparatus using plasma |
| CN111377399A (en) * | 2018-12-29 | 2020-07-07 | 中国石油化工股份有限公司 | Plasma discharge device and method for decomposing hydrogen sulfide |
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