Double-circulation dielectric barrier discharge water treatment device

Abstract

The utility model belongs to the technical field of water treatment, and discloses a double-circulation dielectric barrier discharge water treatment device which comprises a grounding electrode cooling tank, a water pump, a dielectric barrier discharge system, a high-voltage power supply, an internal circulation flowmeter, a fan, a water treatment tank, an air pressure balance tank, a freezing dryer, an external circulation flowmeter, an automatic air pressure supply valve, an oxygen tank and an aeration disc. The double-circulation dielectric barrier discharge water treatment device provided by the utility model can be used for treating various organic wastewater such as industrial wastewater, domestic wastewater and landfill leachate, and has the advantages of simple equipment, stable operation, low energy consumption, high treatment efficiency, no secondary pollution and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and particularly relates to a dual-cycle dielectric barrier discharge water treatment device. Background Technique

[0002] Ozone has extremely strong oxidizing property, and its oxidation-reduction potential is much higher than that of other conventional oxidants, such as KMnO 4 , Cl 2 , H 2 O 2 etc. Moreover, ozone can form hydroxyl radicals with stronger oxidizing ability in water, so it is widely used in water treatment. However, ozone is extremely unstable and will decompose in a short time when heated. Therefore, ozone cannot be stored and transported in bottles like other gases, and can only be produced on-site and used immediately.

[0003] At present, the common ozone generation methods mainly include ultraviolet method, electrolysis method and dielectric barrier discharge method. The ultraviolet method is to irradiate oxygen molecules with ultraviolet light of a certain wavelength to decompose them and then generate ozone. This method has good reproducibility in preparing ozone and is not sensitive to humidity and temperature. However, the lamp used to generate ultraviolet light has high energy consumption and needs to be replaced frequently, which increases the cost of replacing the ultraviolet lamp and ultraviolet radiation protection. In addition, the ozone concentration and purity prepared by the ultraviolet irradiation method are relatively low, and it is not suitable for large-scale production of ozone, so its application value in industrial water treatment is not great. The electrolysis method is to apply low-voltage direct current on the two electrodes of the electrolyte. Ozone is precipitated at the anode and hydrogen is precipitated at the cathode. Due to the instability of the electrode material and the electrolyte, the amount of ozone generated per unit time is low, and the operation cost is also very high. Therefore, there are great difficulties in large-scale water treatment applications. The dielectric barrier discharge method is to insert an insulating medium between the high-voltage electrode and the grounded electrode. When a sufficiently high high-voltage alternating current is applied between the electrodes, large-area discharge occurs in the electrode air gap, and the oxygen introduced can be converted into ozone. This method has the characteristics of high ozone generation concentration, large generation amount, and controllable ozone generation concentration. It is the most common ozone generation method in industrialization at present. However, the ozone generation by the dielectric barrier discharge method is greatly affected by the humidity and temperature of the discharge gas, and there are problems such as high energy consumption in equipment operation and low ozone generation efficiency. According to thermochemical calculations, the theoretical generation efficiency of the dielectric barrier discharge method for preparing ozone is 1226 g / kWh, while the commercial actual efficiency is only 50 - 60 g / kWh (air source), 100 - 120 g / kWh (oxygen source), and the actual yield is far less than the theoretical value, which greatly limits the application of dielectric barrier discharge in water treatment.

[0004] In order to improve the ozone production rate of dielectric barrier discharge, avoid the decomposition of ozone caused by the heat generated by the discharge, and ensure the long-term stable operation of the dielectric barrier discharge system, on the one hand, it is necessary to increase the concentration and conversion rate of oxygen in the discharge gas, and on the other hand, an additional cooling system must be used to cool the dielectric barrier discharge system. However, the current measures will increase the operating cost and energy consumption of the dielectric barrier discharge water treatment. In addition, if ozone remains in the water treatment tail gas, it must be quenched, otherwise it will cause secondary pollution. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the utility model provides a double-cycle dielectric barrier discharge water treatment device.

[0006] The utility model is realized as follows: The wastewater to be treated is both the grounding electrode of the dielectric barrier discharge and the coolant of the discharge gas. Without an additional cooling system, the heat of the dielectric barrier discharge can be reduced, thereby reducing the decomposition of ozone and ensuring the long-term stable operation of the dielectric barrier discharge system; A part of the gas after the dielectric barrier discharge re-enters the dielectric barrier discharge system, that is, the internal circulation, so that the unconverted oxygen in it is converted into ozone, improving the conversion rate of oxygen and the ozone production rate, and reducing the energy consumption; Another part of the gas after the dielectric barrier discharge is dehumidified through water treatment and then re-enters the dielectric barrier discharge system, that is, the external circulation, so that the oxygen in the tail gas is reused, reducing the demand of the dielectric barrier discharge system for external oxygen, reducing the operating cost, and at the same time, avoiding the possible secondary pollution caused by the ozone remaining in the tail gas.

[0007] The double-cycle dielectric barrier discharge water treatment device includes a grounding electrode cooling tank, a water pump, a dielectric barrier discharge system, a high-voltage power supply, an internal circulation flowmeter, a fan, a water treatment tank, a pressure balance tank, a cold dryer, an external circulation flowmeter, a pressure automatic supply valve, an oxygen tank, and an aeration disc.

[0008] The grounding electrode cooling tank is used to hold the grounding cooling water. The lower part of the grounding electrode cooling tank is provided with a grounding electrode cooling tank water inlet, and the grounding electrode cooling tank water inlet is connected to the water inlet through a pipeline via the water pump; The upper part of the grounding electrode cooling tank is provided with a grounding electrode cooling tank gas outlet and a grounding electrode cooling tank water outlet, and the dielectric barrier discharge system is fixed on the top of the grounding electrode cooling tank.

[0009] The dielectric barrier discharge system includes a dielectric barrier discharge support frame, a dielectric barrier discharge support frame top cover, an inner and outer dielectric tube fixing seat, an intake air chamber, an outer dielectric tube, an inner dielectric tube, a dielectric barrier discharge support frame bottom cover, an inner dielectric tube fixing seat, an outer dielectric tube fixing seat, an outlet air chamber, conductive powder, a high-voltage wire, and a grounding wire;

[0010] Further, inside the upper end of the dielectric barrier discharge support frame, a dielectric barrier discharge support frame top cover and an inner and outer dielectric tube fixing seat are installed from top to bottom through threads. An intake air chamber is arranged between the dielectric barrier discharge support frame top cover and the inner and outer dielectric tube fixing seat. The dielectric barrier discharge support frame top cover is provided with a dielectric barrier discharge support frame top cover air hole and a dielectric barrier discharge support frame top cover high-voltage wire hole. The dielectric barrier discharge support frame top cover air hole is communicated with the intake air chamber. The inner and outer dielectric tube fixing seat is provided with an inner and outer dielectric tube fixing seat air hole and an inner and outer dielectric tube fixing seat high-voltage wire hole. The inner and outer dielectric tube fixing seat air hole is communicated with the intake air chamber and the air gap between the outer dielectric tube and the inner dielectric tube; Inside the lower end of the dielectric barrier discharge support frame, a dielectric barrier discharge support frame bottom cover, an inner dielectric tube fixing seat and an outer dielectric tube fixing seat are installed from bottom to top through threads. An outlet air chamber is arranged between the dielectric barrier discharge support frame bottom cover and the inner dielectric tube fixing seat. The dielectric barrier discharge support frame bottom cover is provided with a dielectric barrier discharge support frame bottom cover air hole. The dielectric barrier discharge support frame bottom cover air hole is communicated with the outlet air chamber. The dielectric barrier discharge support frame bottom cover air hole is communicated with the outlet of the grounding electrode cooling tank through a pipeline. The inner dielectric tube fixing seat is provided with an inner dielectric tube fixing seat air hole. The inner dielectric tube fixing seat air hole is communicated with the outlet air chamber and the air gap between the outer dielectric tube and the inner dielectric tube; The inner and outer dielectric tube fixing seat, the outer dielectric tube fixing seat and the inner dielectric tube fixing seat fix the outer dielectric tube and the inner dielectric tube in the dielectric barrier discharge support frame; The conductive powder is filled in the inner dielectric tube; The high-voltage wire passes through the dielectric barrier discharge support frame top cover high-voltage wire hole and the inner and outer dielectric tube fixing seat high-voltage wire hole to connect the voltage output end of the high-voltage power supply with the conductive powder in the inner dielectric tube; The grounding wire connects the ground with the water in the grounding electrode cooling tank; The dielectric barrier discharge support frame top cover air hole is communicated with the outlet of the grounding electrode cooling tank through a pipeline via an inner circulation flowmeter and a fan.

[0011] Further, multiple sets of dielectric barrier discharge systems can be fixed in the grounding electrode cooling tank.

[0012] The water treatment tank is used for treating water. The lower part of the water treatment tank is provided with a water treatment tank intake port and a water treatment tank outlet. The water treatment tank intake port is communicated with the outlet of the grounding electrode cooling tank through a pipeline via a fan. The water treatment tank outlet is communicated with the drain port through a pipeline; The upper part of the water treatment tank is provided with a water treatment tank water inlet and a water treatment tank outlet. The water treatment tank water inlet is communicated with the outlet of the grounding electrode cooling tank through a pipeline. The water treatment tank outlet is communicated with the dielectric barrier discharge support frame top cover air hole through a pipeline via a pressure balance tank, a refrigerant dryer and an outer circulation flowmeter.

[0013] The pressure balance tank is used for balancing the system pressure. The pressure balance tank is communicated with an oxygen tank through a pressure automatic supply valve.

[0014] The aeration disc is arranged in the water treatment tank. The aeration disc is communicated with the water treatment tank intake port through a pipeline;

[0015] Further, a plurality of the aeration disks can be arranged in the water treatment tank.

[0016] First, the waste water to be treated in the grounding electrode cooling tank provided by the present utility model is used as a cooling medium for the dielectric barrier discharge system and the discharge gas, without the need to add an additional cooling system, reducing the equipment cost; after the gas coming out of the air outlet of the grounding electrode cooling tank passes through the fan, a part of the gas enters the dielectric barrier discharge system through the internal circulation flowmeter and the air holes on the top cover of the dielectric barrier discharge support frame, enabling the unreacted oxygen therein to be fully converted, improving the conversion rate of oxygen and the yield of ozone; another part of the gas enters the dielectric barrier discharge system through the air inlet of the water treatment tank, the aeration disk, the air outlet of the water treatment tank, the pressure balance tank, the cold dryer, the external circulation flowmeter and the air holes on the top cover of the dielectric barrier discharge support frame, enabling the oxygen in the tail gas to be reused, reducing the demand for external oxygen by the dielectric barrier discharge system, reducing the operating cost, and at the same time, eliminating the possible secondary pollution caused by the residual ozone in the tail gas; the pressure balance tank and the oxygen tank can not only balance the system pressure to make the device operate stably, but also supplement oxygen to the dielectric barrier discharge system to keep the ozone concentration generated by the dielectric barrier discharge system constant.

[0017] The dual-circulation dielectric barrier discharge water treatment device provided by the present utility model can treat various organic waste waters such as industrial waste water, domestic waste water, landfill leachate, etc., and has the advantages of simple equipment, stable operation, low energy consumption, high treatment efficiency, no secondary pollution, etc.

[0018] Second, the problems of the prior art solved by the present utility model and the significant technological progress obtained are mainly reflected in the following aspects:

[0019] Problems of the prior art solved:

[0020] (1) High energy consumption and operating cost: The traditional dielectric barrier discharge water treatment device has a low ozone output, high unit energy consumption, and requires an additional dielectric barrier discharge cooling system, resulting in a high operating cost.

[0021] (2) Low water treatment efficiency: The ozone concentration generated by the existing dielectric barrier discharge water treatment device is low, making it difficult to effectively degrade the organic pollutants in water.

[0022] (3) Large floor area and complex operation: Although some advanced oxidation water treatment technologies have good effects, the equipment has a large floor area and complex operation, which is not conducive to wide application.

[0023] (4) There are potential safety hazards and secondary pollution problems: Some water treatment technologies involve high-pressure, high-temperature and other conditions, there are certain potential safety hazards, and secondary pollution may be generated.

[0024] Technological progress obtained:

[0025] (1) Energy conservation and environmental protection: The utility model improves the oxygen conversion rate and ozone production rate through internal circulation, reduces energy consumption, reuses the oxygen in the tail gas through external circulation, reduces the demand for external oxygen in the dielectric barrier discharge system, and at the same time avoids the possible secondary pollution caused by the residual ozone in the tail gas. In addition, the water to be treated is used to cool the dielectric barrier discharge system and the discharge gas, further reducing the operating cost.

[0026] (2) Improve the water treatment efficiency: The ozone concentration generated by the double-circulation dielectric barrier discharge water treatment device provided by the utility model is high, which can quickly degrade the organic pollutants in water and improve the water treatment efficiency.

[0027] (3) Compact structure and small floor area: The utility model integrates multiple functional components into one device, with a compact structure and a small floor area, which is convenient for installation and use in a small space.

[0028] (4) Safe, stable and reliable: The dielectric barrier discharge water treatment technology has the advantages of strong applicability and simple operation. The utility model optimizes the system structure and operating parameters, and adopts advanced and safe system voltage stabilizing measures, such as a pneumatic balance tank, a pneumatic automatic supply valve, etc., to ensure the safety and reliability during the operation of the equipment and the stability of the ozone concentration.

[0029] By adopting the double-circulation dielectric barrier discharge technology, the utility model solves the problems existing in the existing water treatment technology, such as high energy consumption and operating cost, low water treatment efficiency, large floor area, complex operation, as well as potential safety hazards and secondary pollution, and realizes efficient, energy-saving, environmental protection and safe water treatment, bringing significant technological progress to the water treatment field.

[0030] Third, as the creative auxiliary evidence of the claims of the utility model, it is also reflected in the following important aspects:

[0031] (1) The technical solution of the utility model greatly reduces the energy consumption and operating cost of dielectric barrier discharge water treatment, and there is no problem of secondary pollution. It is a technology highly regarded in the current water treatment field, and will have immeasurable social value and commercial benefits after transformation.

[0032] (2) The technical solution of the utility model takes energy conservation, environmental protection and high efficiency as its advantages, filling the technical gap in the treatment of various organic wastewaters such as industrial wastewater, domestic wastewater and landfill leachate by dielectric barrier discharge in the domestic and international industries.

[0033] (3) The technical solution of the utility model solves the technical problem of optimizing the dielectric barrier discharge structure to improve the oxygen conversion rate and ozone production, which people have been eager to solve but have never succeeded in.

[0034] (4) The technical solution of the present utility model has an ozone generation efficiency reaching above 150 g / kWh, overcoming the technical prejudice that the efficiency of preparing ozone by dielectric barrier discharge is difficult to exceed 120 g / kWh (oxygen source). BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a schematic structural view of a dual-cycle dielectric barrier discharge water treatment device provided by an embodiment of the present utility model, which arranges 1 set of dielectric barrier discharge system and 1 aeration disk.

[0037] Figure 2 It is a schematic structural view of a dual-cycle dielectric barrier discharge water treatment device provided by an embodiment of the present utility model, which arranges multiple sets of dielectric barrier discharge systems and multiple aeration disks.

[0038] Figure 3 It is a top view of the grounding electrode cooling tank of a dielectric barrier discharge system arranged by an embodiment of the present utility model.

[0039] Figure 4 It is a bottom view of the grounding electrode cooling tank of a dielectric barrier discharge system arranged by an embodiment of the present utility model.

[0040] Figure 5 It is a top view of the grounding electrode cooling tank of multiple sets of dielectric barrier discharge systems arranged by an embodiment of the present utility model.

[0041] Figure 6 It is a bottom view of the grounding electrode cooling tank of multiple sets of dielectric barrier discharge systems arranged by an embodiment of the present utility model.

[0042] Figure 7 It is a structural view of the dielectric barrier discharge support frame provided by an embodiment of the present utility model.

[0043] Figure 8 It is a structural view of the top cover of the dielectric barrier discharge support frame provided by an embodiment of the present utility model.

[0044] Figure 9 It is a structural view of the fixed seat of the inner and outer dielectric tubes provided by an embodiment of the present utility model.

[0045] Figure 10 It is a structural view of the outer dielectric tube provided by an embodiment of the present utility model.

[0046] Figure 11 It is a structural view of the inner dielectric tube provided by an embodiment of the present utility model.

[0047] Figure 12 It is a structural view of the bottom cover of the dielectric barrier discharge support frame provided by an embodiment of the present utility model.

[0048] Figure 13 It is a structural view of the inner dielectric tube fixing seat provided by an embodiment of the present utility model.

[0049] Figure 14 It is a structural view of the outer dielectric tube fixing seat provided by an embodiment of the present utility model.

[0050] Figure 15 It is a top view of the water treatment tank with 1 aeration disk arranged provided by an embodiment of the present utility model.

[0051] Figure 16 It is a bottom view of the water treatment tank with 1 aeration disk arranged provided by an embodiment of the present utility model.

[0052] Figure 17 It is a result diagram of Embodiment 1 provided by an embodiment of the present utility model.

[0053] In the figure: 1. Grounding electrode cooling tank; 1-1. Inlet of the grounding electrode cooling tank; 1-2. Outlet of the grounding electrode cooling tank; 1-3. Outlet of the grounding electrode cooling tank; 2. Water pump; 3. Dielectric barrier discharge system; 3-1. Dielectric barrier discharge support frame; 3-2. Top cover of the dielectric barrier discharge support frame; 3-2-1. Air hole on the top cover of the dielectric barrier discharge support frame; 3-2-2. High-voltage wire hole on the top cover of the dielectric barrier discharge support frame; 3-3. Inner and outer dielectric tube fixing seat; 3-3-1. Air hole on the inner and outer dielectric tube fixing seat; 3-3-2. High-voltage wire hole on the inner and outer dielectric tube fixing seat; 3-4. Inlet air chamber; 3-5. Outer dielectric tube; 3-6. Inner dielectric tube; 3-7. Bottom cover of the dielectric barrier discharge support frame; 3-7-1. Air hole on the bottom cover of the dielectric barrier discharge support frame; 3-8. Inner dielectric tube fixing seat; 3-8-1. Air hole on the inner dielectric tube fixing seat; 3-9. Outer dielectric tube fixing seat; 3-10. Outlet air chamber; 3-11. Conductive powder; 3-12. High-voltage wire; 3-13. Grounding wire; 4. High-voltage power supply; 5. Inner circulation flowmeter; 6. Fan; 7. Water treatment tank; 7-1. Inlet of the water treatment tank; 7-2. Outlet of the water treatment tank; 7-3. Inlet of the water treatment tank; 7-4. Outlet of the water treatment tank; 8. Air pressure balance tank; 9. Refrigerated dryer; 10. Outer circulation flowmeter; 11. Automatic air pressure supply valve; 12. Oxygen tank; 13. Aeration disk. Specific embodiments

[0054] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0055] A dual-cycle dielectric barrier discharge water treatment device provided by an embodiment of the present utility model includes a grounding electrode cooling tank, a water pump, a dielectric barrier discharge system, a high-voltage power supply, an internal circulation flowmeter, a fan, a water treatment tank, a pneumatic balance tank, a cold dryer, an external circulation flowmeter, a pneumatic automatic supply valve, an oxygen tank and an aeration disc;

[0056] The grounding electrode cooling tank is used to hold grounding cooling water and is respectively connected to the water pump and the water treatment tank to cool the dielectric barrier discharge system and the discharge gas;

[0057] The dielectric barrier discharge system is used to generate dielectric barrier discharge and is fixed on the top of the grounding electrode cooling tank;

[0058] The high-voltage power supply is connected to the dielectric barrier discharge system through a wire to provide the required high voltage for the dielectric barrier discharge system;

[0059] The internal circulation flowmeter is used to monitor and adjust the flow rate of the internal circulation gas and is respectively connected to the fan and the dielectric barrier discharge system;

[0060] The fan is installed between the grounding electrode cooling tank and the water treatment tank to promote gas flow;

[0061] The water treatment tank is used to treat water bodies and is respectively connected to the grounding electrode cooling tank, the drain port, the fan and the pneumatic balance tank;

[0062] The pneumatic balance tank is used to balance air pressure and is respectively connected to the water treatment tank and the cold dryer;

[0063] The cold dryer is used to cool and dry the external circulation gas and is connected to the external circulation flowmeter;

[0064] The external circulation flowmeter is used to monitor and adjust the flow rate of the internal circulation gas and is connected to the dielectric barrier discharge system;

[0065] The pneumatic automatic supply valve is used to automatically supply air pressure and is respectively connected to the pneumatic balance tank and the oxygen tank;

[0066] The oxygen tank is used for the storage and supply of oxygen required by the dielectric barrier discharge system;

[0067] The aeration disc is arranged in the water treatment tank to uniformly disperse gas into water.

[0068] A dielectric barrier discharge system of a dual-cycle dielectric barrier discharge water treatment device provided by an embodiment of the present utility model includes a dielectric barrier discharge support frame, a dielectric barrier discharge support frame top cover, an inner and outer dielectric tube fixing seat, an intake air chamber, an outer dielectric tube, an inner dielectric tube, a dielectric barrier discharge support frame bottom cover, an inner dielectric tube fixing seat, an outer dielectric tube fixing seat, an outlet air chamber, conductive powder, a high-voltage wire, and a grounding wire;

[0069] The dielectric barrier discharge support frame serves as the support structure of the entire system. The dielectric barrier discharge support frame top cover and the inner and outer dielectric tube fixing seat are installed at its upper end. An intake air chamber is arranged between the dielectric barrier discharge support frame top cover and the inner and outer dielectric tube fixing seat. The dielectric barrier discharge support frame top cover is provided with a dielectric barrier discharge support frame top cover air hole and a dielectric barrier discharge support frame top cover high-voltage wire hole. The dielectric barrier discharge support frame top cover air hole is communicated with the intake air chamber. The inner and outer dielectric tube fixing seat is provided with an inner and outer dielectric tube fixing seat air hole and an inner and outer dielectric tube fixing seat high-voltage wire hole. The inner and outer dielectric tube fixing seat air hole is communicated with the intake air chamber and the air gap between the outer dielectric tube and the inner dielectric tube;

[0070] The dielectric barrier discharge support frame bottom cover, the inner dielectric tube fixing seat, and the outer dielectric tube fixing seat are installed at the lower end of the dielectric barrier discharge support frame. An outlet air chamber is arranged between the dielectric barrier discharge support frame bottom cover and the inner dielectric tube fixing seat. The dielectric barrier discharge support frame bottom cover is provided with a dielectric barrier discharge support frame bottom cover air hole. The dielectric barrier discharge support frame bottom cover air hole is communicated with the outlet air chamber. The dielectric barrier discharge support frame bottom cover air hole is communicated with the outlet of the grounding electrode cooling tank through a pipeline. The inner dielectric tube fixing seat is provided with an inner dielectric tube fixing seat air hole. The inner dielectric tube fixing seat air hole is communicated with the outlet air chamber and the air gap between the outer dielectric tube and the inner dielectric tube;

[0071] The inner and outer dielectric tube fixing seat, the outer dielectric tube fixing seat, and the inner dielectric tube fixing seat fix the outer dielectric tube and the inner dielectric tube in the dielectric barrier discharge support frame;

[0072] The conductive powder is filled in the inner dielectric tube;

[0073] The high-voltage wire passes through the dielectric barrier discharge support frame top cover high-voltage wire hole and the inner and outer dielectric tube fixing seat high-voltage wire hole to connect the voltage output end of the high-voltage power supply with the conductive powder in the inner dielectric tube;

[0074] The grounding wire connects the ground with the water in the grounding electrode cooling tank;

[0075] The dielectric barrier discharge support frame top cover air hole is communicated with the outlet of the grounding electrode cooling tank through a pipeline via an inner circulation flowmeter and a fan.

[0076] At the lower part of the water treatment tank of a dual - cycle dielectric barrier discharge water treatment device provided by an embodiment of the present utility model, a water treatment tank air inlet and a water treatment tank water outlet are provided. The water treatment tank air inlet is communicated with the air outlet of the grounding electrode cooling tank through a pipeline via a blower, and the water treatment tank water outlet is communicated with a drain port through a pipeline; at the upper part of the water treatment tank, a water treatment tank water inlet and a water treatment tank air outlet are provided. The water treatment tank water inlet is communicated with the water outlet of the grounding electrode cooling tank through a pipeline, and the water treatment tank air outlet is communicated with the air hole at the top cover of the dielectric barrier discharge support frame through a pipeline via a pressure balance tank, a cold dryer and an external circulation flowmeter.

[0077] An aeration disc of a dual - cycle dielectric barrier discharge water treatment device provided by an embodiment of the present utility model is arranged in the water treatment tank. The aeration disc is communicated with the water treatment tank air inlet through a pipeline and is used to increase the contact between the wastewater and ozone and promote the degradation of pollutants.

[0078] Such as Figure 1 and 2 As shown, a dual - cycle dielectric barrier discharge water treatment device with 1 set of dielectric barrier discharge system and 1 aeration disc and a dual - cycle dielectric barrier discharge water treatment device with multiple sets of dielectric barrier discharge systems and multiple aeration discs provided by an embodiment of the present utility model include a grounding electrode cooling tank 1, a water pump 2, a dielectric barrier discharge system 3, a high - voltage power supply 4, an internal circulation flowmeter 5, a blower 6, a water treatment tank 7, a pressure balance tank 8, a cold dryer 9, an external circulation flowmeter 10, a pneumatic automatic supply valve 11, an oxygen tank 12 and an aeration disc 13.

[0079] The detailed connection relationship or position relationship of each component in the embodiment of the present utility model is as follows:

[0080] Grounding electrode cooling tank 1:

[0081] The grounding electrode cooling tank water inlet 1 - 1 is located at the lower part of the grounding electrode cooling tank 1 and is used to connect cooling water.

[0082] The grounding electrode cooling tank water outlet 1 - 3 is located at the upper part of the grounding electrode cooling tank 1 and is used to discharge cooling water.

[0083] The grounding electrode cooling tank air outlet 1 - 2 is also located at the upper part of the grounding electrode cooling tank 1 and is used to discharge the cooled dielectric barrier discharge gas.

[0084] The dielectric barrier discharge system 3 is fixed on the top of the grounding electrode cooling tank 1.

[0085] Dielectric barrier discharge system 3:

[0086] The dielectric barrier discharge support frame 3 - 1 serves as the support structure of the whole system. Inside the top end of it, a dielectric barrier discharge support frame top cover 3 - 2 is installed, and inside the bottom end of it, a dielectric barrier discharge support frame bottom cover 3 - 7 is installed.

[0087] The top cover 3-2 of the dielectric barrier discharge support frame is provided with a gas hole 3-2-1 in the top cover of the dielectric barrier discharge support frame and a high-voltage wire hole 3-2-2 in the top cover of the dielectric barrier discharge support frame, which are respectively used for gas to enter the intake air chamber 3-4 and the penetration of the high-voltage wire 3-12; the bottom cover 3-7 of the dielectric barrier discharge support frame is provided with a gas hole 3-7-1 in the bottom cover of the dielectric barrier discharge support frame, which is used for gas to discharge from the outlet air chamber 3-10.

[0088] The inner and outer dielectric tube fixing seats 3-3 are installed inside the upper end of the dielectric barrier discharge support frame 3-1. The inner and outer dielectric tube fixing seats 3-3 are provided with a gas hole 3-3-1 in the inner and outer dielectric tube fixing seats and a high-voltage wire hole 3-3-2 in the inner and outer dielectric tube fixing seats, which are respectively used for gas to discharge from the intake air chamber 3-4 and the penetration of the high-voltage wire 3-12.

[0089] The intake air chamber 3-4 is located between the top cover 3-2 of the dielectric barrier discharge support frame and the inner and outer dielectric tube fixing seats 3-3, and is used for introducing and discharging gas.

[0090] The inner dielectric tube fixing seat 3-8 and the outer dielectric tube fixing seat 3-9 are respectively installed inside the lower end of the dielectric barrier discharge support frame 3-1, and together with the inner and outer dielectric tube fixing seats 3-3 are used to fix the outer dielectric tube 3-5 and the inner dielectric tube 3-6 inside the dielectric barrier discharge support frame 3-1. The inner dielectric tube fixing seat 3-8 is provided with an inner dielectric tube fixing seat 3-8-1, which is used for gas to enter the outlet air chamber 3-10.

[0091] The outlet air chamber 3-10 is located between the bottom cover 3-7 of the dielectric barrier discharge support frame and the inner dielectric tube fixing seat 3-8, and is used for introducing and discharging gas.

[0092] The conductive powder 3-11 is filled inside the inner dielectric tube 3-6 and is connected to the high-voltage power supply 4 through the high-voltage wire 3-12.

[0093] The grounding wire 2-13 is used to connect the earth with the water in the grounding electrode cooling tank 1.

[0094] Other components:

[0095] The water pump 2 is used to drive the water flow in the water treatment system.

[0096] The high-voltage power supply 4 is used to provide the high voltage required for discharge.

[0097] The fan 6 is usually installed at an appropriate position between the grounding electrode cooling tank 1 and the water treatment tank 7, and is used to promote gas flow.

[0098] The inner circulation flowmeter 5 and the inner circulation flowmeter 10 are respectively used to monitor and adjust the flow rates of the inner circulation gas and the outer circulation gas.

[0099] The water treatment tank 7 is provided with a water treatment tank air inlet 7-1, a water treatment tank water outlet 7-2, a water treatment tank water inlet 7-3 and a water treatment tank air outlet 7-4 for treating water bodies.

[0100] The air pressure balance tank 8 is used to balance the air pressure.

[0101] The cold dryer 9 is used to cool and dry the gas.

[0102] The air pressure automatic supply valve 11 is used to automatically supply air pressure.

[0103] The oxygen tank 12 serves as a storage and supply source of oxygen.

[0104] The aeration disc 13 is used to evenly disperse the gas into the water.

[0105] These components are connected together through pipelines, cables, etc. to form a complete double-cycle dielectric barrier discharge water treatment device to realize the water treatment process.

[0106] One set of the grounding electrode cooling tank 1 of the dielectric barrier discharge system 3 is arranged using Figure 3 、 Figure 4 The structure shown, and for multiple sets of the grounding electrode cooling tanks 1 of the dielectric barrier discharge system 3, the structure shown in Figure 5 、 Figure 6 is used. The grounding electrode cooling tank water inlet 1-1 is arranged at the lower part of the grounding electrode cooling tank 1. The grounding electrode cooling tank water inlet 1-1 is connected to the water inlet through a pipeline via a water pump 2; the grounding electrode cooling tank air outlet 1-2 and the grounding electrode cooling tank water outlet 1-3 are arranged at the upper part of the grounding electrode cooling tank 1, and the dielectric barrier discharge system 3 is fixed on the top of the grounding electrode cooling tank 1.

[0107] The dielectric barrier discharge system 3 includes a dielectric barrier discharge support frame 3-1, a dielectric barrier discharge support frame top cover 3-2, an inner and outer dielectric tube fixing seat 3-3, an air inlet chamber 3-4, an outer dielectric tube 3-5, an inner dielectric tube 3-6, a dielectric barrier discharge support frame bottom cover 3-7, an inner dielectric tube fixing seat 3-8, an outer dielectric tube fixing seat 3-9, an air outlet chamber 3-10, conductive powder 3-11, a high-voltage wire 3-12 and a grounding wire 3-13.

[0108] The dielectric barrier discharge support frame 3-1 uses Figure 7 The structure shown. The dielectric barrier discharge support frame top cover 3-2 and the inner and outer dielectric tube fixing seat 3-3 are installed inside the upper end of the dielectric barrier discharge support frame 3-1 from top to bottom by threads. The dielectric barrier discharge support frame top cover 3-2 and the inner and outer dielectric tube fixing seat 3-3 respectively use Figure 8 and Figure 9The structure shown. An intake air chamber 3-4 is provided between the top cover 3-2 of the dielectric barrier discharge support frame and the fixed seat 3-3 of the inner and outer dielectric tubes. The top cover 3-2 of the dielectric barrier discharge support frame is provided with a top cover air hole 3-2-1 of the dielectric barrier discharge support frame and a high-voltage wire hole 3-2-2 of the top cover of the dielectric barrier discharge support frame. The top cover air hole 3-2-1 of the dielectric barrier discharge support frame is communicated with the intake air chamber 3-4. The fixed seat 3-3 of the inner and outer dielectric tubes is provided with an air hole 3-3-1 of the fixed seat of the inner and outer dielectric tubes and a high-voltage wire hole 3-3-2 of the fixed seat of the inner and outer dielectric tubes. The air hole 3-3-1 of the fixed seat of the inner and outer dielectric tubes is communicated with the intake air chamber 3-4 and the air gap between the outer dielectric tube 3-5 and the inner dielectric tube 3-6. The outer dielectric tube 3-5 and the inner dielectric tube 3-6 adopt Figure 10 and Figure 11 The structure shown. Inside the lower end of the dielectric barrier discharge support frame 3-1, a bottom cover 3-7 of the dielectric barrier discharge support frame, a fixed seat 3-8 of the inner dielectric tube, and a fixed seat 3-9 of the outer dielectric tube are installed from bottom to top by threads. The bottom cover 3-7 of the dielectric barrier discharge support frame, the fixed seat 3-8 of the inner dielectric tube, and the fixed seat 3-9 of the outer dielectric tube respectively adopt Figure 12 、 Figure 13 and Figure 14 The structure shown. An exhaust air chamber 3-10 is provided between the bottom cover 3-7 of the dielectric barrier discharge support frame and the fixed seat 3-8 of the inner dielectric tube. The bottom cover 3-7 of the dielectric barrier discharge support frame is provided with a bottom cover air hole 3-7-1 of the dielectric barrier discharge support frame. The bottom cover air hole 3-7-1 of the dielectric barrier discharge support frame is communicated with the exhaust air chamber 3-10. The bottom cover air hole 3-7-1 of the dielectric barrier discharge support frame is communicated with the air outlet 1-2 of the grounding electrode cooling tank through a pipeline. The fixed seat 3-8 of the inner dielectric tube is provided with an air hole 3-8-1 of the fixed seat of the inner dielectric tube. The air hole 3-8-1 of the fixed seat of the inner dielectric tube is communicated with the exhaust air chamber 3-10 and the air gap between the outer dielectric tube 3-5 and the inner dielectric tube 3-6. The fixed seats 3-3 of the inner and outer dielectric tubes, the fixed seat 3-9 of the outer dielectric tube, and the fixed seat 3-8 of the inner dielectric tube fix the outer dielectric tube 3-5 and the inner dielectric tube 3-6 in the dielectric barrier discharge support frame 3. Conductive powder 3-11 is filled in the inner dielectric tube 3-6. The high-voltage wire 3-12 passes through the high-voltage wire hole 3-2-2 of the top cover of the dielectric barrier discharge support frame and the high-voltage wire hole 3-3-2 of the fixed seat of the inner and outer dielectric tubes to connect the voltage output end of the high-voltage power supply 4 and the conductive powder 3-11 in the inner dielectric tube 3-6. The grounding wire 3-13 connects the earth and the water in the grounding electrode cooling tank 1. The top cover air hole 3-2-1 of the dielectric barrier discharge support frame is communicated with the air outlet 1-2 of the grounding electrode cooling tank through a pipeline via an internal circulation flowmeter 5 and a fan 6.

[0109] The water treatment tank 7 adopts Figure 15 、 Figure 16The structure shown. At the lower part of the water treatment tank 7, a water treatment tank air inlet 7-1 and a water treatment tank water outlet 7-2 are provided. The water treatment tank air inlet 7-1 is communicated with the outlet 1-2 of the grounding electrode cooling tank through a pipeline via a blower 6, and the water treatment tank water outlet 7-2 is communicated with a drain port through a pipeline; at the upper part of the water treatment tank 7, a water treatment tank water inlet 7-3 and a water treatment tank air outlet 7-4 are provided. The water treatment tank water inlet 7-3 is communicated with the outlet 1-3 of the grounding electrode cooling tank through a pipeline, and the water treatment tank air outlet 7-4 is communicated with the air hole 3-2-1 of the top cover of the dielectric barrier discharge support frame through a pipeline via a pressure balance tank 8, a refrigerated dryer 9, and an external circulation flowmeter 10.

[0110] The pressure balance tank 8 is communicated with an oxygen tank 12 through a pressure automatic supply valve 11.

[0111] An aeration disc 13 is arranged in the water treatment tank 7, and the aeration disc 13 is communicated with the water treatment tank air inlet 7-1 through a pipeline.

[0112] A dual-circulation dielectric barrier discharge water treatment device provided by an embodiment of the present invention has the following operating steps:

[0113] First step, check that the connections of all circuits, water circuits, and air circuits are correct;

[0114] Second step, turn on the water pump 2 and inject the wastewater to be treated into the grounding electrode cooling tank 1;

[0115] Third step, start the blower 6 and the refrigerated dryer 9, and adjust the internal circulation flowmeter 5 and the external circulation flowmeter 10 to maintain the flow rates of the internal circulation flowmeter 5 and the external circulation flowmeter 10 at the required values;

[0116] Fourth step, start the high-voltage power supply 4 and adjust the output frequency and output voltage of the high-voltage power supply 4 to the required values.

[0117] Fifth step, after the treatment is completed, turn off the high-voltage power supply 4, the blower 6, and the refrigerated dryer 9.

[0118] In order to prove the creativity and technical value of the technical solution of the present invention, this part is an application embodiment of the technical solution of the claims on a specific product or related technology. Embodiment

[0119] A dual-circulation dielectric barrier discharge water treatment device provided by an embodiment of the present invention, which arranges 1 set of dielectric barrier discharge system 3 and 1 aeration disc 13, is used to treat tap water. The output frequency of the high-voltage power supply 4 is 8 kHz, and the output peak voltage is 12 kV. The ozone concentration at the water treatment tank air inlet 7-1 under four different air circuit operations is monitored, and the results are as Figure 17As shown in the figure, in Gas Path 1, the flow rate of the internal circulation flowmeter 5 is 0 L / min, the external circulation pipeline is disconnected at the outlet of the cold dryer 9, and the flow rate of the external circulation flowmeter 10 is 10 L / min; in Gas Path 2, the flow rate of the internal circulation flowmeter 5 is 15 L / min, the external circulation pipeline is disconnected at the outlet of the cold dryer 11, and the flow rate of the external circulation flowmeter 10 is 10 L / min; in Gas Path 3, the flow rate of the internal circulation flowmeter 5 is 0 L / min, and the flow rate of the external circulation flowmeter 10 is 10 L / min; in Gas Path 4, the flow rate of the internal circulation flowmeter 5 is 15 L / min, and the flow rate of the external circulation flowmeter 10 is 10 L / min.

[0120] It can be seen from Figure 17 that the ozone concentration at the inlet 7-1 of the water treatment tank during the operation of Gas Path 2 and Gas Path 4 is higher than that during the operation of Gas Path 1 and Gas Path 3. This shows that the internal circulation of a dual-circulation dielectric barrier discharge water treatment device disclosed in the present invention enables the oxygen in the dielectric barrier discharge system 3 to be fully converted, improving the ozone conversion rate; by comparing the ozone concentrations at the inlet 7-1 of the water treatment tank during the operation of Gas Path 1 and Gas Path 3, and Gas Path 2 and Gas Path 4, it can be seen that the external circulation of a dual-circulation dielectric barrier discharge water treatment device disclosed in the present invention re-uses the oxygen in the tail gas, increasing the ozone concentration. This also reduces the demand for external oxygen by the dielectric barrier discharge system 3, lowering the operating cost, and at the same time eliminating the possible secondary pollution caused by the residual ozone in the tail gas. Embodiment

[0121] A dual-circulation dielectric barrier discharge water treatment device provided by the embodiment of the present invention, which arranges 1 set of dielectric barrier discharge system 3 and 1 aeration disk 13, is used to treat the wastewater of a dyeing factory, a pharmaceutical factory, a hospital, and a certain urban domestic wastewater. The inlet and the outlet are connected by a pipeline. The output frequency of the high-voltage power supply 4 is 8 kHz, the output peak voltage is 12 kV, the flow rate of the internal circulation flowmeter 5 is 15 L / min, the flow rate of the external circulation flowmeter 10 is 10 L / min, the treated water volume is 70 L, the treatment time is 30 min, and water samples are collected at the outlet 7-2 of the water treatment tank every 5 min for analysis. The results are shown in Table 1.

[0122] Table 1 Results of Embodiment 2

[0123]

[0124] As can be seen from Table 1, after treating typical industrial wastewater and domestic wastewater with a dual-circulation dielectric barrier discharge water treatment device provided by the present invention, which arranges 1 set of dielectric barrier discharge system and 1 aeration disk, the main water quality indicators, such as COD, BOD 5, chromaticity, fecal coliform count, etc., all meet the industry discharge standards, indicating that a dual-cycle dielectric barrier discharge water treatment device provided by the present utility model can treat various industrial organic wastewater and domestic wastewater. Embodiment

[0125] A dual-cycle dielectric barrier discharge water treatment device provided by the embodiment of the present utility model, which arranges multiple sets of dielectric barrier discharge systems 3 and multiple aeration discs 13, is used to treat landfill leachate. Five sets of dielectric barrier discharge systems 3 are arranged in the ground electrode cooling tank 1, and five aeration discs 13 are arranged in the water treatment tank 7. The water inlet and the drain outlet are connected through pipelines. The output frequency of the high-voltage power supply 4 is 12 kHz, the output peak voltage is 10 kV, the flow rate of the internal circulation flowmeter 5 is 150 L / min, the flow rate of the external circulation flowmeter 10 is 100 L / min, the treated water volume is 1500 L, and the treatment time is 60 min. The results are shown in Table 2.

[0126] Table 2 Results of Embodiment III

[0127] Main water quality indicators Before treatment After treatment Control standard Chromaticity (dilution multiple) 200 30 40 <![CDATA[COD Cr (mg / L)]]> 852 68 100 <![CDATA[BOD 5 (mg / L)]]> 124 24 30 Fecal coliform (number / L) 60000 200 10000

[0128] As can be seen from Table 2, the main water quality indicators of the landfill leachate before treatment are all higher than the discharge standards. After being treated by a dual-cycle dielectric barrier discharge water treatment device disclosed by the present utility model, the main water quality indicators meet the discharge requirements of the "Pollution Control Standard for Domestic Waste Landfills" (GB16889-2008), and the effluent water quality is very stable. This embodiment shows that a dual-cycle dielectric barrier discharge water treatment device provided by the present utility model can treat landfill leachate on a large scale, operate stably for a long time, has high treatment efficiency, and does not produce any secondary pollution.

[0129] In summary, a dual-cycle dielectric barrier discharge water treatment device provided by the present utility model is suitable for treating various industrial organic wastewater, domestic wastewater, landfill leachate, etc., and has the advantages of simple equipment, stable operation, low energy consumption, high treatment efficiency, no secondary pollution, etc.

[0130] In the description of the present utility model, unless otherwise specified, the meanings of "multiple" and "multiple sets" are two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "upper end", "lower end", "top", "bottom", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0131] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be covered by the protection scope of the present utility model.

Claims

1. A double-circulation dielectric barrier discharge water treatment device, characterized in that: It includes ground electrode cooling tank, water pump, dielectric barrier discharge system, high voltage power supply, internal circulation flow meter, fan, water treatment tank, air pressure balance tank, cold dryer, external circulation flow meter, air pressure automatic supply valve, oxygen tank and aeration plate; The ground electrode cooling tank is used to contain ground cooling water, which is connected to the water pump and the water treatment tank respectively to realize the cooling of the dielectric barrier discharge system and the discharge gas; The dielectric barrier discharge system is used to generate dielectric barrier discharge and is fixed on the top of the ground electrode cooling tank; The high-voltage power supply is connected to the dielectric barrier discharge system through a wire to provide the required high voltage to the dielectric barrier discharge system; The internal circulation flow meter is used to monitor and adjust the flow of the internal circulation gas, and is connected to the fan and the dielectric barrier discharge system respectively; The fan is installed between the ground electrode cooling tank and the water treatment tank to promote gas flow; The water treatment tank is used to treat water and is connected to the ground electrode cooling tank, drain outlet, fan and air pressure balance tank respectively; The air pressure balance tank is used to balance the air pressure and is connected to the water treatment tank and the cold dryer respectively; The cold dryer is used to cool and dry the external circulation gas and is connected to the external circulation flow meter; The external circulation flow meter is used to monitor and adjust the flow of the internal circulation gas and is connected to the dielectric barrier discharge system; The air pressure automatic supply valve is used to automatically supply air pressure, and is connected to the air pressure balance tank and the oxygen tank respectively; Oxygen tanks are used to store and supply oxygen required by the dielectric barrier discharge system; The aeration plate is set in the water treatment tank to evenly disperse the gas into the water.

2. The device according to claim 1, characterized in that The dielectric barrier discharge system comprises a dielectric barrier discharge support frame, a dielectric barrier discharge support frame top cover, inner and outer dielectric tube fixing seats, an air inlet chamber, an outer dielectric tube, an inner dielectric tube, a dielectric barrier discharge support frame bottom cover, an inner dielectric tube fixing seat, an outer dielectric tube fixing seat, an air outlet chamber, conductive powder, a high-voltage wire and a grounding wire; The dielectric barrier discharge support frame serves as a supporting structure of the entire system, and a dielectric barrier discharge support frame top cover and inner and outer dielectric tube fixing seats are installed on its upper end; an air inlet chamber is arranged between the dielectric barrier discharge support frame top cover and the inner and outer dielectric tube fixing seats; the dielectric barrier discharge support frame top cover air holes and dielectric barrier discharge support frame top cover high-voltage wire holes are arranged on the dielectric barrier discharge support frame top cover; the dielectric barrier discharge support frame top cover air holes are connected with the air inlet chamber; the inner and outer dielectric tube fixing seats are provided with inner and outer dielectric tube fixing seat air holes and inner and outer dielectric tube fixing seat high-voltage wire holes; the inner and outer dielectric tube fixing seat air holes are connected with the air inlet chamber and the air gap between the outer dielectric tube and the inner dielectric tube; The dielectric barrier discharge support frame is provided with a dielectric barrier discharge support frame bottom cover, an inner dielectric tube fixing seat and an outer dielectric tube fixing seat at the lower end thereof; an air outlet chamber is provided between the dielectric barrier discharge support frame bottom cover and the inner dielectric tube fixing seat; the dielectric barrier discharge support frame bottom cover is provided with dielectric barrier discharge support frame bottom cover air holes; the dielectric barrier discharge support frame bottom cover air holes are connected with the air outlet chamber; the dielectric barrier discharge support frame bottom cover air holes are connected with the air outlet of the ground electrode cooling tank through a pipeline; the inner dielectric tube fixing seat is provided with inner dielectric tube fixing seat air holes; the inner dielectric tube fixing seat air holes are connected with the air outlet chamber and the air gap between the outer dielectric tube and the inner dielectric tube; The inner and outer dielectric tube fixing seats, the outer dielectric tube fixing seat, and the inner dielectric tube fixing seat fix the outer dielectric tube and the inner dielectric tube in the dielectric barrier discharge support frame; The conductive powder is filled in the inner medium tube.

3. The device according to claim 2, characterized in that The high-voltage wire passes through the high-voltage wire hole of the top cover of the dielectric barrier discharge support frame and the high-voltage wire holes of the inner and outer dielectric tube fixing seats to connect the voltage output end of the high-voltage power supply with the conductive powder in the inner dielectric tube.

4. The device according to claim 2, characterized in that The grounding wire is connected to the earth and the water in the grounding electrode cooling tank.

5. The device according to claim 2, characterized in that The air hole on the top cover of the dielectric barrier discharge support frame is connected with the air outlet of the ground electrode cooling tank through a pipeline via an internal circulation flow meter and a fan.

6. The device according to claim 1, characterized in that A water treatment tank air inlet and a water treatment tank water outlet are arranged at the lower part of the water treatment tank, the water treatment tank air inlet is connected with the ground electrode cooling tank air outlet through a pipeline via a fan, and the water treatment tank water outlet is connected with the drain outlet through a pipeline; a water treatment tank water inlet and a water treatment tank air outlet are arranged at the upper part of the water treatment tank, the water treatment tank water inlet is connected with the ground electrode cooling tank water outlet through a pipeline, and the water treatment tank air outlet is connected with the air hole on the top cover of the dielectric barrier discharge support frame through a pipeline via an air pressure balance tank, a cold dryer and an external circulation flowmeter.

7. The device according to claim 1, characterized in that The aeration plate is arranged in the water treatment tank and is connected with the air inlet of the water treatment tank through a pipeline, so as to increase the contact between wastewater and ozone and promote the degradation of pollutants.

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