Integrated device for efficiently treating wastewater through cooperation of microbubbles and plasmas

Abstract

The invention discloses an integrated device for efficiently treating waste water through cooperation of microbubbles and plasmas, and belongs to the technical field of waste water treatment through the plasma technology.The plasma generation system comprises an electrode bar, an electrode sleeve, a quartz tube and a copper tube ground electrode, and the electrode bar is fixed through the electrode sleeve and inserted into the quartz tube with a branch gas port; the copper tube ground electrode is tightly combined with the lower portion of the quartz tube, the microbubble system comprises an outlet connector, a porous ceramic tube and a device shell, the porous ceramic tube is placed in the device shell, a water inlet and a water outlet are reserved in the left side and the right side of the device shell respectively, the circulating system comprises a water storage tank and a water pump, and the water pump is installed in the water storage tank. The industrial wastewater treatment device is easy to operate, small in size, low in cost, capable of being used independently or jointly, large in wastewater treatment capacity and capable of meeting the treatment requirement of industrial wastewater, in the wastewater treatment process, power consumption is low, chemical agents do not need to be introduced, wastewater treatment cost is reduced, and secondary pollution is avoided.

Description

Technical Field

[0001] This invention relates to an integrated device for treating wastewater, and more particularly to an integrated device for efficient wastewater treatment using microbubbles and synergistic plasma, belonging to the field of plasma technology for wastewater treatment. Background Technology

[0002] In recent years, given the complex composition of wastewater discharge, plasma technology, which utilizes high-voltage discharge to generate a large number of active free radicals, high-energy electrons, ozone, and other strong oxidizing and highly reactive species, has become a research hotspot. This technology reacts with organic matter in wastewater, breaking down the organic matter chains and thus degrading the wastewater. Plasma water treatment technology is energy-saving, environmentally friendly, requires no reagents, and has low operating costs.

[0003] Currently, various discharge plasma technologies have been applied to wastewater treatment, but they all suffer from problems such as small treatment capacity, low treatment efficiency, and small effective contact area with wastewater. For example, a method for treating wastewater using a low-temperature plasma device, disclosed in domestic application number 202111654209.6, proposes to use low-temperature plasma generated by dielectric barrier discharge to work with peroxymonosulfate to degrade organic matter in wastewater.

[0004] However, the limited discharge area results in a small wastewater treatment capacity, and the addition of peroxymonosulfate during the wastewater treatment process increases the cost of wastewater treatment.

[0005] The domestic application No. 202210565736.8 discloses a "plasma microbubble wastewater purification device and method" that proposes to inject active species in plasma into wastewater in the form of microbubbles and treat the wastewater in conjunction with a catalyst. The wastewater injection flow rate of this method is 30-100 mL / min, which also has the problem of insufficient wastewater treatment capacity. Therefore, there is an urgent need to design a device that can treat wastewater in large quantities and efficiently. Summary of the Invention

[0006] The main objective of this invention is to overcome the aforementioned problems: "However, the limited discharge area results in a small wastewater treatment capacity, and the addition of peroxymonosulfate during the wastewater treatment process increases the cost of wastewater treatment, while still resulting in an insufficient wastewater treatment capacity." This invention provides an integrated device for efficient wastewater treatment using microbubbles and synergistic plasma, with the following improvements: The integrated device and method for efficient wastewater treatment using microbubble and plasma synergistic technology provided by this invention separates the plasma generation system from the microbubble system. The plasma generation process is not affected by the properties of the wastewater and can be applied to the treatment of different types of wastewater. The integrated device for efficient wastewater treatment using microbubbles and plasma synergistically provided by this invention can refine plasma into microbubbles, which can be fully mixed with wastewater, increasing the contact area with wastewater and improving the utilization efficiency of plasma. The integrated device for efficient wastewater treatment by microbubble synergistic plasma provided by this invention is simple to operate, small in size, low in cost, and can be used alone or in combination. It has a large wastewater treatment capacity and meets the treatment requirements of industrial wastewater. The integrated device for efficient wastewater treatment using microbubbles and plasma synergistic provided by this invention has low power consumption, does not require the introduction of chemical agents, reduces wastewater treatment costs, and avoids secondary pollution during the wastewater treatment process.

[0007] The objective of this invention can be achieved by adopting the following technical solution: An integrated device for efficient wastewater treatment using microbubbles and plasma synergistically, comprising a plasma generation system, a microbubble system, and a circulation system; The plasma generation system includes electrode rods, electrode sleeves, quartz tubes, and copper tube ground electrodes; The electrode rod is fixed by an electrode sleeve and inserted into a quartz tube with a vent. The inner diameter of the copper tube ground electrode is the same as the outer diameter of the quartz tube. The quartz tube and the copper tube ground electrode are sleeved on the outside of the quartz tube. The copper tube ground electrode is tightly bonded to the upper part of the quartz tube; The microbubble system includes an outlet connector, a porous ceramic tube, and a device housing, wherein the porous ceramic tube is placed inside the device housing; The device casing has an inlet and an outlet on the left and right sides, respectively. The circulation system includes a water storage tank and a water pump, with the water pump installed in the water storage tank.

[0008] Preferably, the gas environment inside the quartz tube is introduced through the air inlet. The quartz tube has a length of 80mm, an outer diameter of 8mm, and a thickness of 1mm. The upper section of the inner chamber is equipped with a circuit board for driving the plasma, and the upper outer section of the outer chamber is equipped with a start-up connector.

[0009] Preferably, the plasma is generated within the area enclosed by the quartz tube and the copper tube ground electrode. The electrode rod, electrode sleeve, quartz tube, air inlet, copper tube ground electrode, outlet connector, device housing, porous ceramic tube, water inlet and water outlet are installed inside the housing, while the water storage tank and water pump are placed outside the housing. The circuit board and starting connector for driving the plasma are installed on the housing.

[0010] Preferably, the outlet connector is tightly connected to the quartz tube and the device housing, and the gas and plasma inside the quartz tube enter the microbubble system through the outlet connector.

[0011] Preferably, the apparatus for treating wastewater using microbubble plasma as described in the claims includes the following steps: The plasma generated inside the quartz tube enters the microbubble system through the outlet connector. After passing through the porous ceramic tube, it is refined into tiny bubbles. The refined plasma is then fully mixed with the wastewater to be treated in the microbubble system through the inlet and enters the circulation system through the outlet for recycling.

[0012] Preferably, the gas flow rate entering the quartz tube from the air inlet is 0.1-1.5 L / min.

[0013] Preferably, the flow rate of the wastewater to be treated entering the microbubble system from the inlet can be set to 0-300 L / h.

[0014] Preferably, the electrode rod is a cylindrical threaded rod with a diameter of 3 mm and a length of 80 mm, the air port length is 35 mm, the outer diameter of the air port is 7 mm, and the thickness is 1 mm.

[0015] Preferably, the copper tube ground electrode has a length of 40 mm, an inner diameter of 8 mm, and a thickness of 0.5 mm, and is fitted over the quartz tube.

[0016] Beneficial technical effects of the present invention: This invention provides an integrated device for efficient wastewater treatment using microbubbles and synergistic plasma. The integrated device for efficient wastewater treatment using microbubble and plasma synergy provided by this invention separates the plasma generation system from the microbubble system. The plasma generation process is not affected by the properties of the wastewater and can be applied to the treatment of different types of wastewater. The integrated device for efficient wastewater treatment using microbubbles and plasma synergistically provided by this invention can refine plasma into microbubbles, which can be fully mixed with wastewater, increasing the contact area with wastewater and improving the utilization efficiency of plasma. The integrated device for efficient wastewater treatment using microbubbles and plasma synergistic provided by this invention is simple to operate, small in size, and low in cost. It can be used alone or in combination, and has a large wastewater treatment capacity, meeting the treatment requirements of industrial wastewater. The integrated device for efficient wastewater treatment using microbubbles and plasma synergistic provided by this invention has low power consumption, does not require the introduction of chemical agents, reduces wastewater treatment costs, and avoids secondary pollution during the wastewater treatment process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall internal structure of a preferred embodiment of an integrated device for efficient wastewater treatment using microbubbles and synergistic plasma according to the present invention. Figure 2This is a schematic diagram of the overall internal structure of a preferred embodiment of an integrated device for efficient wastewater treatment using microbubbles and synergistic plasma according to the present invention. Figure 3 This is a side view of the overall internal structure of a preferred embodiment of an integrated device for efficient wastewater treatment using microbubbles and synergistic plasma according to the present invention. Figure 4 This is a schematic diagram of the back of an integrated device for efficient wastewater treatment using microbubbles and plasma in accordance with the present invention.

[0018] In the diagram: 1. Electrode rod; 2. Electrode sleeve; 3. Quartz tube; 4. Bronchial opening; 5. Copper tube ground electrode; 6. Outlet connector; 7. Device casing; 8. Porous ceramic tube; 9. Water inlet; 10. Water outlet; 11. Water storage tank; 12. Water pump; 13. Circuit board for driving plasma; 14. Box body; 15. Start the connector. Detailed Implementation

[0019] To enable those skilled in the art to understand the technical solution of the present invention more clearly, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0020] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the figure, this embodiment provides an integrated device for efficient wastewater treatment using microbubbles and plasma. The integrated device for efficient wastewater treatment using microbubbles and plasma includes a plasma generation system, a microbubble system, and a circulation system. The plasma generation system includes an electrode rod 1, an electrode sleeve 2, a quartz tube 3, and a copper tube ground electrode 5; The electrode rod 1 is fixed by the electrode sleeve 2 and inserted into the quartz tube 3 with the air vent 4. The inner diameter of the copper tube ground electrode 5 is the same as the outer diameter of the quartz tube 3. The quartz tube 3 and the copper tube ground electrode 5 are sleeved on the outside of the quartz tube 3. The copper tube ground electrode 5 is tightly bonded to the upper part of the quartz tube 3; The microbubble system includes an outlet connector 6, a porous ceramic tube 8, and a device housing 7, wherein the porous ceramic tube 8 is placed inside the device housing 7; The device housing 7 has an inlet 9 and an outlet 10 on its left and right sides, respectively. The circulation system includes a water storage tank 11 and a water pump 12, wherein the water storage tank 11 is equipped with the water pump 12.

[0021] The gas environment inside the quartz tube 3 is introduced through the air inlet 4. The quartz tube 3 has a length of 80mm, an outer diameter of 8mm, and a thickness of 1mm. The upper section of the box 14 is equipped with a circuit board 13 for driving plasma, and the upper section of the outer side of the box 14 is equipped with a starter connector 15.

[0022] The plasma is generated within the area enclosed by the quartz tube 3 and the copper tube ground electrode 5. The electrode rod 1, electrode sleeve 2, quartz tube 3, air inlet 4, copper tube ground electrode 5, outlet connector 6, device housing 7, porous ceramic tube 8, water inlet 9 and water outlet 10 are installed inside the housing 14. The circuit board 13 for driving the plasma and the starting connector 15 are installed on the housing 14. The water tank 11 and water pump 12 are placed outside the housing 14.

[0023] The outlet connector 6 is tightly connected to the quartz tube 3 and the device housing 7. The gas and plasma inside the quartz tube 3 enter the microbubble system through the outlet connector 6.

[0024] The device for treating wastewater with microbubble plasma further includes the following steps: The plasma generated inside the quartz tube 3 enters the microbubble system through the outlet connector 6. After passing through the porous ceramic tube 8, it is refined into tiny bubbles. The refined plasma enters the wastewater to be treated into the microbubble system through the inlet 9 and is fully mixed. Then, it enters the circulation system through the outlet 10 for circulation treatment.

[0025] The gas flow rate entering the quartz tube 3 from the vent 4 is 0.1-1.5 L / min.

[0026] The flow rate of the wastewater to be treated entering the microbubble system through inlet 9 can be set to 0-300 L / h.

[0027] The electrode rod 1 is a cylindrical threaded rod with a diameter of 3 mm and a length of 80 mm. The air port 4 has a length of 35 mm, an outer diameter of 7 mm, and a thickness of 1 mm.

[0028] The copper tube ground electrode 5 is 40mm long, 8mm in inner diameter, and 0.5mm thick. The copper tube ground electrode 5 is fitted over the quartz tube 3. After the electrode rod 1 is connected to an external high voltage, plasma can be generated in the area wrapped by the copper tube ground electrode 5 inside the quartz tube 3. The microbubble system includes an outlet connector 6, a porous ceramic tube 8, and a device housing 7; The outlet connector 6 is made of polytetrafluoroethylene. The porous ceramic tube 8 is placed in the device housing 7. The outlet connector 6 can tightly connect the bottom of the quartz tube 3, the device housing 7 and the porous ceramic tube 8. The outlet connector 6 is the only outlet for the gas entering the quartz tube 3. The discharge plasma inside the quartz tube 3 can be refined into microbubbles after passing through the porous ceramic tube 8 via the outlet connector 6. Wastewater inlet 9 and wastewater outlet 10 are respectively provided on the left and right sides of the device casing 7; The circulation system includes a water storage tank 11 and a water pump 12. The wastewater in the water storage tank 11 is pumped to the wastewater inlet 9 by the water pump 12. The plasma, which is refined into microbubbles, is fully mixed with the wastewater in the device and then flows into the water storage tank from the wastewater outlet 10 for circulation treatment. The flow rate of wastewater entering the device can be set to 0-300L / h; When treating chemical industrial wastewater, an AC current of 10kV and 5kHz was applied to the electrode rod. Air was introduced into the air inlet at a flow rate of 1.5L / min, and the wastewater flow rate entering the device was 200L / h. The circulation treatment time was 2h. The treatment results are shown in the table below:

[0029] The potassium dichromate method and the chromium method were adopted.

[0030] Example 2: The solution in Example 1 will be further described below with reference to its specific working method. See the description below for details: like Figure 1 As shown, in a preferred embodiment, based on the above method, the gas environment inside the quartz tube 3 is further introduced through the air inlet 4. The length of the quartz tube 3 is 80 mm, the outer diameter is 8 mm, and the thickness is 1 mm.

[0031] Plasma is generated within the region enclosed by quartz tube 3 and copper tube ground electrode 5.

[0032] The outlet connector 6 is tightly connected to the quartz tube 3 and the device housing 7. The gas and plasma inside the quartz tube 3 enter the microbubble system through the outlet connector 6.

[0033] The device for treating wastewater with microbubble plasma further includes the following steps: The plasma generated inside the quartz tube 3 enters the microbubble system through the outlet connector 6. After passing through the porous ceramic tube 8, it is refined into tiny bubbles. The refined plasma enters the wastewater to be treated into the microbubble system through the inlet 9 and is fully mixed. Then, it enters the circulation system through the outlet 10 for circulation treatment.

[0034] The gas flow rate entering the quartz tube 3 from the vent 4 is 0.1-1.5 L / min.

[0035] The flow rate of the wastewater to be treated entering the microbubble system through inlet 9 can be set to 0-300 L / h.

[0036] The electrode rod 1 is a cylindrical threaded rod with a diameter of 3 mm and a length of 80 mm. The air port 4 has a length of 35 mm, an outer diameter of 7 mm, and a thickness of 1 mm.

[0037] The copper tube ground electrode 5 is 40mm long, 8mm in inner diameter, and 0.5mm thick. The copper tube ground electrode 5 is fitted over the quartz tube 3.

[0038] When treating aquaculture wastewater, an AC current of 8kV and 5kHz was applied to the electrode rod, oxygen was introduced into the air inlet at a flow rate of 1L / min, the flow rate of the wastewater entering the device was 150L / h, and the circulation time was 1h. The treatment results are shown in the table below:

[0039] The potassium dichromate method and the chromium method are used. The microbubble-assisted plasma wastewater treatment apparatus and method provided by this invention can effectively treat large quantities of wastewater.

[0040] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. An integrated device for efficient wastewater treatment using microbubbles and synergistic plasma, characterized in that: An integrated device for wastewater treatment using microbubbles and plasma, comprising a plasma generation system, a microbubble system, and a circulation system; The plasma generation system includes an electrode rod (1), an electrode sleeve (2), a quartz tube (3), and a copper tube ground electrode (5). The electrode rod (1) is fixed by the electrode sleeve (2) and inserted into the quartz tube (3) with the air vent (4). The inner diameter of the copper tube ground electrode (5) is the same as the outer diameter of the quartz tube (3). The quartz tube (3) and the copper tube ground electrode (5) are sleeved on the outside of the quartz tube (3). The copper tube ground electrode (5) is tightly bonded to the upper part of the quartz tube (3); The microbubble system includes an outlet connector (6), a porous ceramic tube (8), and a device housing (7), wherein the porous ceramic tube (8) is placed inside the device housing (7); The device housing (7) has an inlet (9) and an outlet (10) on the left and right sides, respectively. The circulation system includes a water storage tank (11) and a water pump (12), wherein the water storage tank (11) is equipped with the water pump (12).

2. The integrated device for efficient wastewater treatment using microbubbles and synergistic plasma as described in claim 1, characterized in that: The gas environment inside the quartz tube (3) is introduced through the air inlet (4). The quartz tube (3) is 80mm long, 8mm in outer diameter, and 1mm thick. The upper section of the box (14) is equipped with a circuit board (13) for driving plasma, and the upper section of the outer side of the box (14) is equipped with a starter connector (15).

3. The integrated device for efficient wastewater treatment using microbubbles and synergistic plasma as described in claim 1, characterized in that: The plasma is generated within the area enclosed by the quartz tube (3) and the copper tube ground electrode (5). The electrode rod (1), electrode sleeve (2), quartz tube (3), air inlet (4), copper tube ground electrode (5), outlet connector (6), device housing (7), porous ceramic tube (8), water inlet (9) and water outlet (10) are installed inside the housing (14). The circuit board (13) for driving the plasma and the start-up connector (15) are installed on the housing (14). The water tank (11) and water pump (12) are placed outside the housing (14).

4. The integrated device for efficient wastewater treatment using microbubbles and synergistic plasma as described in claim 3, characterized in that: The outlet connector (6) is tightly connected to the quartz tube (3) and the device housing (7), through which the gas and plasma in the quartz tube (3) enter the microbubble system.

5. The integrated device for efficient wastewater treatment using microbubbles and synergistic plasma as described in claim 1, characterized in that: The device for treating wastewater with microbubble plasma further includes the following steps: The plasma generated inside the quartz tube (3) enters the microbubble system through the outlet connector (6), and is refined into tiny bubbles after passing through the porous ceramic tube (8). The refined plasma enters the wastewater to be treated in the microbubble system through the inlet (9) and is fully mixed, and then enters the circulation system through the outlet (10) for circulation treatment.

6. The integrated device for efficient wastewater treatment using microbubbles and synergistic plasma as described in claim 3, characterized in that: The gas flow rate from the vent (4) into the quartz tube (3) is 0.1-1.5 L / min.

7. The integrated device for efficient wastewater treatment using microbubbles and synergistic plasma as described in claim 4, characterized in that: The flow rate of the wastewater to be treated entering the microbubble system through the inlet (9) can be set to 0-300L / h.

8. The integrated device for efficient wastewater treatment using microbubbles and synergistic plasma as described in claim 7, characterized in that: The electrode rod (1) is a cylindrical threaded rod with a diameter of 3 mm and a length of 80 mm. The air port (4) has a length of 35 mm, an outer diameter of 7 mm, and a thickness of 1 mm.

9. The integrated device for efficient wastewater treatment using microbubbles and synergistic plasma as described in claim 8, characterized in that: The copper tube ground electrode (5) is 40 mm long, 8 mm in diameter, and 0.5 mm thick. The copper tube ground electrode (5) is fitted over the quartz tube (3).

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