A distributed multi-channel plasma water treatment device for recycling discharge gas

Abstract

The present invention discloses a distributed multi-channel plasma water treatment device for recycling discharged gas, which sequentially includes a sewage tank, a plurality of plasma water treatment units arranged side by side, and a water collection tank; the plasma water treatment unit further includes a uniform water inlet, a uniform water outlet, and a movable door; the plasma reaction cylinder is a coaxial sleeve structure of an inner tube and an outer tube, and a conductive liquid is sealed in its inner tube as a low-voltage electrode, and a metal layer or mesh is sleeved on the outer side of the outer tube as a high-voltage electrode; the cavity between the inner and outer tubes serves as a low-temperature plasma discharge area; the plasma reaction cylinder is an integrated structure of quartz or corundum ceramic medium; the liquid channel between the inner and outer cylinders extends spirally downward; it also includes a high-voltage power supply module and a power management module; the high-voltage power supply module realizes distributed power supply to a plurality of plasma water treatment units through the power management module. The present invention can achieve plasma treatment according to factors such as the water quality and flow rate of wastewater.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment by plasma technology, and particularly to a distributed multi-channel plasma water treatment device with recycled discharge gas. Background Art

[0002] Low-temperature plasma technology is a composite advanced oxidation technology, which combines strong oxidizing particle reactions, ultraviolet light decomposition technology, wet oxidation technology, etc. A large number of active particles (·OH, ·O, O3, H2O2, etc.) and high-energy electrons are generated through discharge, along with certain physical effects. Among them, dielectric barrier discharge has the advantages of uniform stability and wide air pressure selection, and can obtain good treatment effects in actual wastewater treatment, ensuring the up-to-standard discharge of tail water. However, at present, the problems of small discharge area and limited water treatment capacity have restricted its development in industrialization. How to construct a low-temperature plasma water treatment device, ensure its safe and stable operation, and expand the treatment capacity of sewage treatment plant tail water on the basis of ensuring treatment effects is an urgent problem to be solved.

[0003] The prior art with the publication number of 2021212126415 authorized by the applicant discloses a low-temperature plasma sewage treatment device, which improves the traditional plasma jet gun treatment method. A quartz inner tube and a quartz outer tube are arranged in a sewage tank, and sewage is discharged into the gap between the quartz inner tube and the quartz outer tube. A plasma electric field is generated between the quartz inner tube and the outer tube to treat the wastewater passing through the gap, which is suitable for scenarios with low wastewater treatment requirements such as laboratories. However, during the promotion and research and development of the product by this research and development team, it was found that if plasma is used to treat industrial wastewater, the conventional design is to splice multiple original schemes. However, the following problems were found during the splicing process: (1) The water treatment capacity does not match; the wastewater flow rate treated by the plasma electric field between the inner and outer quartz tubes of a single wastewater is too small, and simply adding the unit pipelines does not increase the water treatment capacity enough; and in the original design, the wastewater first fills the inner tube and then flows into the gap between the inner and outer tubes through a flushing trough for treatment, such a design will also limit the water treatment capacity. (2) The electric field space in the gap between a single inner and outer tube is relatively small, and the time for sewage to pass through the electric field is relatively short, and the treatment effect is not sufficient. (3) The sewage in the inner tube was originally used as the ground electrode, and its dielectric constant would change due to the composition of the sewage, so the water treatment effect is uncontrollable. For the above reasons, it is necessary to adapt the original plasma sewage treatment device to the treatment of industrial wastewater. Summary of the Invention

[0004] 1. Technical problems to be solved:

[0005] In view of the above technical problems, the present invention provides a distributed multi-channel plasma water treatment device for recycling discharge gas, which can meet the large-scale water treatment requirements of industrial wastewater by improving the channels and electrode structures of wastewater, increasing the contact area between plasma and sewage, and enhancing the sewage treatment effect by making corresponding improvements to the ground electrode.

[0006] 2. Technical solution:

[0007] A distributed multi-channel plasma water treatment device for recycling discharge gas, characterized in that: the plasma water treatment device is an integrated structure, which successively includes a sewage tank, a plurality of juxtaposed plasma water treatment units, and a water collection tank from top to bottom; the liquid to be treated flows into the plasma reaction cylinder of the plasma water treatment unit from the sewage tank at the uppermost end and then flows into the water collection tank below; the plasma water treatment unit further includes a uniform water inlet, a uniform water outlet, and a movable door; the plasma reaction cylinder is a coaxial sleeve structure of an inner tube and an outer tube, and a conductive liquid is sealed in its inner tube as a low-voltage electrode, and a metal layer or mesh is sleeved outside the outer tube as a high-voltage electrode; the cavity between the inner and outer tubes is used as a low-temperature plasma discharge area; the uniform water inlet and the uniform water outlet are respectively a circle of equal-sized through holes at the top and bottom of the cavity between the inner and outer tubes; the movable door is installed on the surface of the plasma reaction cylinder, and when the plasma water treatment unit works, its corresponding movable door moves away from its corresponding uniform water inlet; conversely, the movable door seals its corresponding uniform water inlet;

[0008] The plasma reaction cylinder is an integrated structure of quartz or corundum ceramic medium; the upper surfaces of the inner and outer cylinders are hermetically arranged on the bottom surface of the sewage tank; the liquid channel between the inner and outer cylinders extends spirally downward; the lower surfaces of the inner and outer cylinders are connected to the top surface of the water collection tank;

[0009] It further includes a high-voltage power module and a power management module; the high-voltage power module realizes distributed power supply to a plurality of plasma water treatment units through the power management module.

[0010] Furthermore, probes of water quality detection sensors are arranged in both the sewage tank and the water collection tank; the power control module realizes power supply to the plasma water treatment unit according to the signals detected by the probes of the water quality detection sensors in the sewage tank; the probes of the water quality detection sensors in the water collection tank display the detection signals of the treated liquid through a display device and give a reminder for water quality signals exceeding the preset range.

[0011] Furthermore, the conductive liquid in the inner cylinder is water and metal powder or / and salt; the replacement and adjustment of the conductive liquid are realized through the liquid inlet and outlet of the inner cylinder.

[0012] Furthermore, the sewage tank is provided with a water inlet; a pipe at the water inlet is connected to a water pump to input the liquid to be treated into the sewage tank.

[0013] Furthermore, the sewage tank is provided with an air inlet; the air inlet is connected to the air source through a pipeline.

[0014] Furthermore, an ultraviolet lamp is provided in the water collecting tank.

[0015] Furthermore, the water outlet in the water collecting tank is connected to the water inlet of the sewage tank through a pipe to generate a circulation treatment pipe; the circulation treatment pipe transfers the liquid in the water collecting tank to the sewage tank through a water pump, thereby realizing the circulation treatment of heavily polluted wastewater.

[0016] Furthermore, a ventilation hole is provided on the side wall of the water collecting tank at the water outlet of the plasma water treatment unit, and the ventilation hole is connected to the external ventilation duct; a filter layer and a water isolation layer are provided in the ventilation duct, and a vortex fan is used to extract the ozone generated by the plasma discharge in the water collecting tank, and the extracted ozone is injected into the treated water, so that the ozone and water are fully integrated.

[0017] A distributed multi-channel plasma water treatment method with discharge gas recycling comprises the following steps:

[0018] Step 1: Turn on the main switch, power on the water pump of the sewage tank, and detect the water level in the sewage tank; according to the height of the water level in the sewage tank, the power control module controls the corresponding number of plasma water treatment units to work;

[0019] Step 2: The movable door of the plasma water treatment unit is opened, and the plasma power supply electrode is energized; the fan in the ventilation duct is energized;

[0020] Step 3: The probe of the water quality detection sensor in the water collection tank sends the treated water quality information to the control system; the control system determines whether to open the circulation treatment pipeline according to the water quality parameters preset; until the water quality parameters of the treated water in the water collection tank meet the preset range;

[0021] Step 4: Open the water outlet in the water collection tank and drain the treated water.

[0022] Furthermore, the water quality parameter is a set of multiple preset water quality options; the water quality option set includes multiple preset water quality options, and each preset water quality option corresponds to a water quality data.

[0023] 3.Beneficial effects:

[0024] (1)The distributed multi-channel plasma water treatment equipment provided by the present invention is applied to large-scale industrial wastewater treatment. Aiming at the problem that the wastewater flow rate treated by the plasma electric field between the inner and outer tubes of a single wastewater quartz is too small in the prior art, this solution not only uses multiple plasma water treatment units for parallel treatment, but also adopts a unique discharge cavity to extend the wastewater to pass through the low-temperature plasma discharge area, so as to achieve the effect of wastewater treatment.

[0025] (2)In the present invention, aiming at the limitation of the high-voltage power supply for multiple plasma treatment units, the power supply module is adopted to realize the power control of each plasma treatment unit, and sufficient high voltage is provided for each plasma treatment unit.

[0026] (3)In the present invention, the relevant water quality information before and after treatment is respectively detected by water quality detection sensors, and the information is transmitted to the control system. According to the water quality information before treatment, the number of plasma water treatment units participating in the work is controlled, and whether cyclic treatment is required is judged according to the water quality information after treatment; thus, the effect of water treatment is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an external view of a distributed multi-channel plasma water treatment equipment with recycling of discharge gas;

[0028] Figure 2 It is a front view of a plasma water treatment unit in the present invention; [[ID= / / ]]

[0029] Figure 3 It is an external view of a plasma water treatment unit in the present invention;

[0030] Figure 4 It is a schematic diagram of the uniform water inlet of a plasma water treatment unit in the present invention;

[0031] Figure 5 It is a sectional view of a plasma water treatment unit in the present invention;

[0032] Figure 6 [[ID=3 / / ]]It is the spiral liquid channel in the plasma water treatment unit in the present invention;

[0033] Figure 7 It is a sectional view of the sewage tank in the present invention;

[0034] Figure 8 It is the electrical control block diagram of the present invention;

[0035] Figure 9 It is the water treatment effect diagram of the specific embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0036] The present invention will be specifically described below with reference to the accompanying drawings.

[0037] As shown in the appended Figure 1 to the appended Figure 7 figures, a distributed multi-channel plasma water treatment device for recycling discharge gas is characterized in that: the plasma water treatment device is of an integrated structure, and successively includes a sewage tank 1, a plurality of juxtaposed plasma water treatment units 2, and a water collection tank 3 from top to bottom; the liquid to be treated flows into the plasma reaction cylinder of the plasma water treatment unit from the sewage tank at the uppermost end and then flows into the water collection tank below; the plasma water treatment unit further includes a uniform water inlet 5, a uniform water outlet 6, and a movable door 7; the plasma reaction cylinder is a coaxial socket structure of an inner tube and an outer tube, and a conductive liquid is sealed in its inner tube 8 as a low-voltage electrode, and a metal layer or mesh 9 is sleeved outside the outer tube 10 as a high-voltage electrode; the cavity between the inner and outer tubes serves as a low-temperature plasma discharge region; the uniform water inlets and the uniform water outlets are respectively a circle of equally large through holes 11 at the top and bottom of the cavity between the inner and outer tubes; the movable door is installed on the surface of the plasma reaction cylinder, and when the plasma water treatment unit works, its corresponding movable door moves away from its corresponding uniform water inlet; conversely, the movable door seals its corresponding uniform water inlet.

[0038] The plasma reaction cylinder is an integrated structure of quartz or corundum ceramic medium; the upper surfaces of the inner and outer cylinders are hermetically arranged on the bottom surface of the sewage tank; the liquid channel 12 between the inner and outer cylinders extends spirally downward; the lower surfaces of the inner and outer cylinders are connected to the top surface of the water collection tank.

[0039] It further includes a high-voltage power module and a power management module; the high-voltage power module realizes distributed power supply to a plurality of plasma water treatment units through the power management module.

[0040] As shown in the appended Figure 1 figures is the external view of the present invention. In the figure, the front part is the water treatment part and the rear part is the electrical control box; the right side is

[0041] Further, probes of water quality detection sensors are arranged in both the sewage tank and the water collection tank; the detection signal of the probe of the water quality detection sensor in the sewage tank realizes power supply to the plasma water treatment unit through the power control module; the probe of the water quality detection sensor in the water collection tank displays the detection signal of the treated liquid through a display device and gives a reminder for water quality signals exceeding the preset range.

[0042] Further, the conductive liquid in the inner cylinder is water and metal powder or / and salt; the replacement and adjustment of the conductive liquid are realized through the liquid inlet and outlet of the inner cylinder.

[0043] Further, the sewage tank is provided with a water inlet; a pipeline is connected to a water pump at the water inlet to realize the input of the liquid to be treated into the sewage tank.

[0044] Further, an air inlet is provided in the sewage tank; the air inlet is connected to an air source through a pipeline.

[0045] Further, an ultraviolet lamp is provided in the water collection tank.

[0046] Further, the water outlet in the water collection tank is connected to the water inlet of the sewage tank through a pipeline to form a circulating treatment pipeline 14; the circulating treatment pipeline uses a water pump 15 to conduct the liquid in the water collection tank to the sewage tank, realizing the circulating treatment of highly polluted wastewater.

[0047] Further, ventilation holes are provided at the water outlet of the plasma water treatment unit on the side wall of the water collection tank, and the ventilation holes are connected to an external ventilation pipeline 16; a filter layer and a water isolation layer are provided in the ventilation pipeline, and a vortex fan is used to extract the ozone generated by plasma discharge in the water collection tank and inject the extracted ozone into the treated water, so that the ozone and water are fully integrated. [[ID=ll]]

[0048] A distributed multi-channel plasma water treatment method for recycling discharge gas includes the following steps:

[0049] Step 1: Turn on the main switch, the water pump in the sewage tank is powered on, and the water level in the sewage tank is detected; when the height of the water level in the sewage tank is reached, the power control module controls the corresponding number of plasma water treatment units to work;

[0050] Step 2: Open the movable door of the plasma water treatment unit, and the plasma power electrode is powered on;

[0051] Step 3: The probe of the water quality detection sensor in the water collection tank sends the water quality information of the treated water to the control system; it is judged whether to open the circulating treatment pipeline through the water quality parameters preset by the control system; until the water quality parameters of the treated water in the water collection tank meet the preset range;

[0052] Step 4: Open the water outlet in the water collection tank to discharge the treated water.

[0053] Further, the water quality parameters are multiple preset water quality option sets; each water quality option set includes multiple preset water quality options, and each preset water quality option corresponds to a water quality data. Specific embodiment:

[0055] The control system diagram of this specific embodiment is as Figure 8 shown. The control chip receives the relevant information transmitted by each sensor and controls the relevant modules according to the preset program to realize wastewater treatment. Figure 1 The multiple plasma water treatment units in

[0056] In this device, a brand-new plasma reaction cylinder is designed to improve the treatment efficiency of wastewater; as shown in the attached Figures 2 to 6 is a detailed diagram of the plasma water treatment unit; a circle of uniform inflow water inlets is arranged at the top of the plasma water treatment unit, which can ensure that the liquid enters the low-temperature plasma discharge area evenly; the liquid channel in the discharge area is spiral, which can effectively increase the time for the liquid to pass through the discharge area and improve the treatment efficiency; in order to ensure the balance of the electric field in the discharge area, the ground electrode in this design is fixed as the inner cylinder in the reaction cylinder, and the conductive liquid in it can be adjusted according to the water quality of the liquid to be treated to enhance the electric field (in the prior art, the ground electrode is to introduce the waste liquid to be treated, and its conductivity coefficient is uncertain, resulting in unstable wastewater treatment effect).

[0057] In this device, the controller receives the water level information from the water level sensor and the water quality information before treatment detected by the water quality sensor, and judges the number of plasma water treatment units that need to work and whether cyclic repeated treatment is required. The water inlet of each plasma water treatment unit is controlled by a switch door driven by a motor to determine whether the liquid is introduced. Usually, several switch doors are grouped and controlled by the same motor. During the treatment process, an auxiliary treatment unit is usually set in the sewage tank or the collection tank for auxiliary treatment. In this embodiment, an infrared lamp is used for auxiliary treatment in the sewage tank; an aeration device or other means can also be set in the collection tank for treatment.

[0058] In practical applications, the number of plasma treatment units is designed according to the flow rate of the sewage to be treated, and at the same time, the scale of the whole device is adjusted. In order to solve the problem of high-voltage power distribution, the power supply device realizes the power supply to multiple plasma water treatments through the power control module, so that this solution can be implemented. This device can be an independent wastewater treatment device as a whole, or a link in the industrial wastewater system. Other modules can be adjusted according to the specific composition of the wastewater.

[0059] The daily average industrial sewage treatment capacity of the sewage treatment system of this device is more than 200 tons. The COD removal efficiency is monitored in real time every hour. The single-time COD removal rate of the sewage can reach more than 50%, and the sewage can reach more than 80% after reflux treatment. As shown in the attached Figure 9 The figure shows the detection diagram of the water treatment realized by 12 plasma water treatment units in the attached drawings of this device.

[0060] Although the present invention has been disclosed above with preferred embodiments, they are not used to limit the present invention. Any person skilled in this art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the protection scope of the claims of this application.

Claims

1. A distributed multi-channel plasma water treatment device for recycling discharge gas, characterized in that: The plasma water treatment equipment is of an integrated structure, which sequentially includes a sewage tank, a plurality of juxtaposed plasma water treatment units, and a water collection tank from top to bottom; the liquid to be treated flows into the plasma reaction cylinder of the plasma water treatment unit from the sewage tank at the uppermost end and then flows into the water collection tank below; the plasma water treatment unit further includes a uniform water inlet, a uniform water outlet, and a movable door; the plasma reaction cylinder is a coaxial socket structure of an inner cylinder and an outer cylinder, and a conductive liquid is sealed in its inner cylinder as a low-voltage electrode, and a metal layer or mesh is sleeved outside the outer cylinder as a high-voltage electrode; the cavity between the inner and outer cylinders serves as a low-temperature plasma discharge area; the uniform water inlet and the uniform water outlet are respectively a circle of equally large through holes at the top and bottom of the cavity between the inner and outer cylinders; the movable door is installed on the surface of the plasma reaction cylinder, and when the plasma water treatment unit works, its corresponding movable door moves away from its corresponding uniform water inlet; conversely, the movable door seals its corresponding uniform water inlet; The plasma reaction cylinder is a one-piece structure of quartz or corundum ceramic medium; the upper surfaces of the inner and outer cylinders are hermetically arranged on the bottom surface of the sewage tank; the liquid channel between the inner and outer cylinders extends spirally downward; the lower surfaces of the inner and outer cylinders are connected to the top surface of the water collection tank; It further includes a high-voltage power supply module and a power control module; the high-voltage power supply module realizes distributed power supply to a plurality of plasma water treatment units through the power control module; The conductive liquid in the inner cylinder is water and metal powder or salt; the replacement and adjustment of the conductive liquid are realized through the liquid inlet and outlet of the inner cylinder; The sewage tank is provided with a water inlet; a pipeline is connected to the water inlet and a water pump is used to input the liquid to be treated into the sewage tank.

2. The distributed multi-channel plasma water treatment device for recycling discharge gas according to claim 1, wherein: Probes of water quality detection sensors are arranged in both the sewage tank and the water collection tank; the power control module realizes the power supply to the plasma water treatment unit according to the signal detected by the probe of the water quality detection sensor in the sewage tank; the probe of the water quality detection sensor in the water collection tank displays the detection signal of the treated liquid through a display device and gives a reminder for the water quality signal exceeding the preset range; a water level sensor is arranged in the sewage tank; the power control module realizes the power supply to the plasma water treatment unit according to the information of the water level sensor.

3. The distributed multi-channel plasma water treatment equipment for recycling discharge gas according to claim 1, wherein: The sewage tank is provided with an air inlet; the air inlet is connected to an air source through a pipeline.

4. A distributed multi-channel plasma water treatment device for recycling discharge gas according to claim 1, characterized in that: An ultraviolet lamp is arranged in the water collection tank.

5. A distributed multi-channel plasma water treatment device for recycling discharge gas according to claim 1, characterized in that: Ventilation holes are arranged on the side wall of the water collection tank at the water outlet of the plasma water treatment unit, and the ventilation holes are connected to an external ventilation pipeline; a filter layer and a water isolation layer are arranged in the ventilation pipeline, and a vortex fan is used to extract the ozone generated by the plasma discharge in the water collection tank and inject the extracted ozone into the treated water, so that the ozone and water are fully integrated.

6. The distributed multi-channel plasma water treatment device for recycling discharge gas according to claim 1, characterized in that: The water outlet in the water collection tank is connected to the water inlet of the sewage tank through a pipeline to form a circulating treatment pipeline; the circulating treatment pipeline realizes the conduction of the liquid in the water collection tank to the sewage tank through a water pump, so as to realize the circulating treatment of highly polluted wastewater.

7. A distributed multi-channel plasma water treatment method for recycling discharge gas, which uses a distributed multi-channel plasma water treatment device for recycling discharge gas as described in any one of claims 1-6 to achieve wastewater treatment; characterized in that: It includes the following steps: Step 1: Turn on the main switch, the water pump in the sewage tank is powered on, and the water level in the sewage tank is detected; according to the height of the water level in the sewage tank, the power control module controls the corresponding number of plasma water treatment units to work; Step 2: Open the movable door of the plasma water treatment unit, and energize the plasma power electrode; energize the fan in the ventilation duct; Step 3: The probe of the water quality detection sensor in the collection tank sends the processed water quality information to the control system; judge whether to open the circulation treatment pipeline according to the water quality parameters preset by the control system; until the water quality parameters of the processed water in the collection tank meet the preset range; Step 4: Open the water outlet in the collection tank to discharge the processed water.

8. A distributed multi-channel plasma water treatment method for recycling discharge gas according to claim 7, characterized in that: The water quality parameters are multiple preset water quality option sets; each water quality option set includes multiple preset water quality options, and each preset water quality option corresponds to a water quality data.

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