An underwater plasma and biochar synergistic water treatment device

Abstract

The present invention proposes an underwater plasma and biochar synergistic water treatment device, relating to the technical field of water treatment devices. The device comprises a pressure pump, a powder feeder, a tubular aerator, and a magnetic separator. The water outlet of the pressure pump is connected to the water inlet of the tubular aerator via a first connecting pipe, and the powder feeder is connected to the first connecting pipe. A multiphase, multistage underwater plasma discharge reactor is disposed between the tubular aerator and the magnetic separator, and the multiphase, multistage underwater plasma discharge reactor is connected to the tubular aerator, and the multiphase, multistage underwater plasma discharge reactor is connected to the magnetic separator via a second connecting pipe. The present invention utilizes multiphase, multistage underwater plasma discharge to generate a large amount of highly active free radicals, hydrogen peroxide, ozone, shock waves, and photoelectrocatalytic oxidation effects in water, resulting in a nanopowder adsorption effect. The device also magnetically modifies the biochar powder, facilitating its recovery and multiple use, thereby reducing water treatment costs.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment devices, and in particular to an underwater plasma and biochar collaborative water treatment device. Background Art

[0002] The mainstream treatment method for high-fluoride water in my country is a combination of activated Al₂O₃ adsorption and acid treatment for regeneration. The latest and most effective treatment methods for water contaminated with high phosphorus, high nitrogen, multiple metals, and high concentrations of organic matter focus on magnetically modified biochar adsorption. Biochar, with its large surface area and numerous oxygen-containing functional groups, possesses enhanced cation exchange capacity and the ability to bind organic molecules, making it a valuable adsorption material. The most important aspect of magnetic modification is that it facilitates the recovery of the adsorbent, achieving the desired decontamination effect. However, this method is costly and requires a lengthy treatment process.

[0003] There is an invention patent with Chinese publication number CN110882676A, which discloses a method for preparing magnetic adsorption biochar material. The technology mainly describes the process of immersing biomass carbon in FeCl3 solution, drying it at 105℃, and heating it at 650℃ for curing.

[0004] An existing Chinese invention patent, CN111203180A, discloses a magnetic biochar composite adsorbent, its preparation method, and its application. The technology primarily involves impregnating biochar in a ferrous salt solution, Fe(NO3)2, followed by baking and then heating to solidify it. However, regardless of the type of ferrous salt used, the subsequent process remains largely unchanged, resulting in high production costs. Summary of the Invention

[0005] The purpose of the present invention is to provide an underwater plasma and biochar collaborative water treatment device, which can propose solutions to the shortcomings of the existing technology. It uses multi-phase and multi-stage underwater plasma discharge to generate a large number of highly active free radicals, hydrogen peroxide, ozone, shock waves, and photoelectrocatalytic oxidation effects in the water, producing a nanopowder adsorption effect, which can sterilize and disinfect the water body while adsorbing and coordinating with biochar powder. At the same time, it can also make the biochar powder magnetically modified, which is convenient for the recovery and multiple use of the biochar powder, thereby reducing the cost of water treatment.

[0006] The technical solution adopted in the present invention is:

[0007] The embodiment of the present application provides an underwater plasma and biochar synergistic water treatment device, comprising a pressure pump, a powder feeder, a tubular aerator, and a magnetic separator. The water outlet of the pressure pump and the water inlet of the tubular aerator are connected through a first connecting pipe, and the powder feeder is connected to the first connecting pipe.

[0008] A multiphase multistage underwater plasma discharge reactor is provided between the water outlet end of the tubular aerator and the magnetic separator. One end of the multiphase multistage underwater plasma discharge reactor is connected to the water outlet end of the tubular aerator, and the other end of the multiphase multistage underwater plasma discharge reactor is connected to the magnetic separator through a second connecting pipe.

[0009] Furthermore, in some embodiments of the present invention, the above also includes a contaminated water tank, a clean water storage tank and a mounting bracket, and the water inlet end of the pressure pump is connected to the contaminated water tank; the magnetic separator is arranged on the mounting bracket and located above the clean water storage tank.

[0010] Furthermore, in some embodiments of the present invention, the multiphase multistage underwater plasma discharge reactor includes a reactor tube and a plurality of electrode assemblies arranged in the reactor tube, one end of the reactor tube is connected to the water outlet end of the tubular aerator, and the other end of the reactor tube is connected to the second connecting pipe.

[0011] Furthermore, in some embodiments of the present invention, the electrode assembly includes an insulated electrode mounting sleeve, an insulator, a conductive plate, an electrode block, and an insulating ceramic plate, one end of the insulated electrode mounting sleeve is a first communication port, the other end of the insulated electrode mounting sleeve is a second communication port, the insulated electrode mounting sleeve is provided in the reactor tube, and the first communication port is in communication with the interior of the reactor tube;

[0012] The insulator is embedded in the insulating electrode mounting sleeve and seals the second connecting port; the conductive plate, electrode block and insulating ceramic plate are all located in the insulating electrode mounting sleeve, the first connecting port, insulating ceramic plate, electrode block, conductive plate and insulator are arranged in sequence, and the electrode block and the conductive plate are electrically connected; the insulating ceramic plate is provided with a plurality of capillaries connecting the first connecting port and the electrode block.

[0013] Furthermore, in some embodiments of the present invention, a conductive spring is abutted between the conductive plate and the electrode block.

[0014] Furthermore, in some embodiments of the present invention, the insulator is provided with a threading hole, the insulator is provided with an external thread, the insulating electrode mounting sleeve is provided with an internal thread, and the insulator and the insulating electrode mounting sleeve are threadedly connected.

[0015] Furthermore, in some embodiments of the present invention, a first sealing ring is provided between one side of the insulating ceramic plate and the inner wall of the insulating electrode mounting sleeve, and between the other side of the insulating ceramic plate and the side wall of the electrode block.

[0016] Furthermore, in some embodiments of the present invention, the above-mentioned reactor tube is provided with an electrode mounting tube seat connected to its interior, and the electrode mounting tube seat is provided with an internal thread; the insulated electrode mounting sleeve is provided with an external thread, and the insulated electrode mounting sleeve is threadedly connected to the electrode mounting tube seat; a second sealing ring is provided between the insulated electrode mounting sleeve and the electrode mounting tube seat.

[0017] Furthermore, in some embodiments of the present invention, flanges are provided at both ends of the reactor tube.

[0018] Furthermore, in some embodiments of the present invention, the reactor tube is provided with a sight glass mounting tube connected to the interior thereof, and further comprises a sight glass tube, which is arranged on the sight glass mounting tube and has a sight glass arranged inside the sight glass tube.

[0019] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0020] An embodiment of the present invention provides an underwater plasma and biochar collaborative water treatment device, which utilizes multi-phase and multi-stage underwater plasma discharge to generate a large number of highly active free radicals, hydrogen peroxide, ozone, shock waves, and photoelectrocatalytic oxidation effects in water, producing a nanopowder adsorption effect, which sterilizes and disinfects while collaboratively adsorbing biochar powder to treat the water body. At the same time, the biochar powder is magnetically modified, which facilitates the recovery and multiple use of the biochar powder and reduces the cost of water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of a water treatment device provided in an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a multiphase multistage underwater plasma discharge reactor provided by an embodiment of the present invention;

[0024] Figure 3 A schematic structural diagram of an electrode assembly provided in an embodiment of the present invention;

[0025] Figure 4 An exploded view of an electrode assembly provided in an embodiment of the present invention;

[0026] Figure 5 A cross-sectional view of a multi-phase multi-stage underwater plasma discharge reactor provided by an embodiment of the present invention along the position of an electrode assembly;

[0027] Figure 6 A cross-sectional view of an electrode assembly provided in an embodiment of the present invention;

[0028] Figure 7 An exploded view of the observation tube, observation mirror, and third sealing ring provided in an embodiment of the present invention;

[0029] Figure 8 A cross-sectional view of a multi-phase multi-stage underwater plasma discharge reactor provided in an embodiment of the present invention along the observation tube position.

[0030] Icons: 1-pressure pump; 2-powder feeder; 3-tubular aerator; 4-magnetic separator; 5-multiphase multi-stage underwater plasma discharge reactor; 6-first connecting pipe; 7-second connecting pipe; 8-contaminated water tank; 9-clean water storage tank; 10-mounting bracket; 51-reactor tube; 52-electrode assembly; 53-electrode mounting pipe seat; 54-second sealing ring; 55-flange; 56-sightglass mounting tube; 57-observation tube; 58-observation mirror; 59-third sealing ring; 521-insulated electrode mounting sleeve; 522-insulator; 523-conductive plate; 524-electrode block; 525-insulating ceramic plate; 526-first connecting port; 527-second connecting port; 528-capillary; 529-conductive spring; 5211-threading hole; 5212-first sealing ring. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] Example

[0035] Please refer to Figures 1-8This embodiment provides an underwater plasma and biochar synergistic water treatment device, comprising a pressure pump 1, a powder feeder 2, a tubular aerator 3, and a magnetic separator 4. The water outlet of the pressure pump 1 is connected to the water inlet of the tubular aerator 3 via a first connecting pipe 6, and the powder feeder 2 is connected to the first connecting pipe 6.

[0036] A multiphase, multistage underwater plasma discharge reactor 5 is installed between the water outlet of the tubular aerator 3 and the magnetic separator 4. One end of the multiphase, multistage underwater plasma discharge reactor 5 is connected to the water outlet of the tubular aerator 3, and the other end of the multiphase, multistage underwater plasma discharge reactor 5 is connected to the magnetic separator 4 via a second connecting pipe 7. The system also includes a contaminated water tank 8, a clean water storage tank 9, and a mounting bracket 10. The water inlet of the pressure pump 1 is connected to the contaminated water tank 8. The magnetic separator 4 is installed on the mounting bracket 10 and is located above the clean water storage tank 9.

[0037] The polluted water tank 8 of this embodiment stores sewage that needs to be treated. The powder feeder 2 can be an existing suction-jet powder feeder. The powder feeder 2 stores biomass carbon powder, and the biomass carbon powder can be fed into the first connecting pipe 6 through the powder feeder 2 to mix the biomass carbon powder with the sewage. The tubular aerator 3 is an existing product, which is used for the aeration of sewage. The magnetic separator 4 can be an existing wet magnetic separator, which is used for magnetic separation of biomass carbon powder after magnetic modification, and separates the biomass carbon powder after magnetic modification from the treated clean water. The multiphase multi-stage underwater plasma discharge reactor 5 of this embodiment can be used in combination with one or more. When multiple reactors are used, they can be connected in series or in parallel, such as Figure 1 As shown, the multi-phase multi-stage underwater plasma discharge reactor 5 of this embodiment is two and is connected in series. The multi-phase multi-stage underwater plasma discharge reactor 5 of this embodiment is used to be powered to perform plasma discharge on sewage.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the multiphase multi-stage underwater plasma discharge reactor 5 includes a reactor tube 51 and a plurality of electrode assemblies 52 disposed in the reactor tube 51. One end of the reactor tube 51 is connected to the water outlet of the tubular aerator 3, and the other end of the reactor tube 51 is connected to the second connecting pipe 7. In this embodiment, each reactor tube 51 is provided with 12 electrode assemblies 52, and the 12 electrode assemblies 52 are distributed on the outer wall of the reactor tube 51 in four layers, divided radially into three equal parts and axially.

[0039] like Figure 3-Figure 6As shown, the electrode assembly 52 includes an insulated electrode mounting sleeve 521, an insulator 522, a conductive plate 523, an electrode block 524, and an insulating ceramic plate 525. The material of the electrode block 524 is any one of steel, titanium alloy, aluminum alloy, and graphite, which are selected and used in combination according to process requirements. The conductive plate 523 is made of conductive materials such as copper plates. One end of the insulated electrode mounting sleeve 521 is a first connecting port 526, and the other end of the insulated electrode mounting sleeve 521 is a second connecting port 527. The insulated electrode mounting sleeve 521 is provided in the reactor tube 51, and the first connecting port 526 is connected to the interior of the reactor tube 51.

[0040] Insulator 522 is embedded in insulated electrode mounting sleeve 521 and seals second communication port 527. Conductive plate 523, electrode block 524, and insulating ceramic plate 525 are all located within insulated electrode mounting sleeve 521. First communication port 526, insulating ceramic plate 525, electrode block 524, conductive plate 523, and insulator 522 are sequentially arranged, with electrode block 524 and conductive plate 523 electrically connected. Insulating ceramic plate 525 is provided with multiple capillary holes 528 connecting first communication port 526 with electrode block 524. Capillary holes 528 allow wastewater to contact electrode block 524. After wastewater flows into reactor tube 51, it flows through first communication port 526 and capillary holes 528, where it comes into contact with electrode block 524.

[0041] A conductive spring 529 is disposed between the conductive plate 523 and the electrode block 524. The conductive spring 529 is made of metal and has electrical conductivity, allowing current to flow through the conductive plate 523 and the conductive spring 529 to the electrode block 524, thereby charging the electrode block 524.

[0042] Insulator 522 is provided with a threading hole 5211. Insulator 522 is externally threaded, and insulated electrode mounting sleeve 521 is internally threaded. Insulator 522 is threadedly connected to insulated electrode mounting sleeve 521. The threaded connection between insulator 522 and insulated electrode mounting sleeve 521 facilitates removal of insulator 522 to replace internal components and facilitates rotational installation of insulator 522 to seal second communication port 527. Threading hole 5211 is provided on insulator 522. During use, wires are passed through threading hole 5211 and connected to conductive plate 523. In this embodiment, each of the twelve electrode assemblies 52 is individually connected to wires and supplied with power via a 12-phase power supply. This generates a multi-phase, multi-level current for wastewater discharge treatment.

[0043] In actual use, the pressure pump 1 pumps wastewater from the contaminated water tank 8 through the first connecting pipe 6 and the tubular aerator 3 into the multiphase, multi-stage underwater plasma discharge reactor 5. As the wastewater flows through the first connecting pipe 6, the powder feeder 2 delivers biomass carbon powder into the first connecting pipe 6 to mix the biomass carbon powder with the wastewater. Upon entering the multiphase, multi-stage underwater plasma discharge reactor 5, the wastewater flows into the first connecting ports 526 and capillary holes 528, where it comes into contact with the electrode block 524. A single-phase connecting wire from an external multiphase AC power source passes through the wire hole 5211 of the insulator 522 and connects to the conductive plate 523. This current, transmitted by the conductive spring 529, charges the electrode block 524, which then contacts the conductive wastewater solution through the capillary holes 528 in the insulating ceramic plate 525, delivering electricity to the wastewater solution in the reactor tube 51.

[0044] When current from electrode block 524 flows through capillary pores 528, the wastewater solution heats up, generating water vapor bubbles. Under the applied voltage, these bubbles break down into tiny arcs, a process known as capillary discharge. Because capillary discharge continuously generates bubbles, which then break down to form an underwater plasma arc, the entire area of the treated water solution is filled with an underwater multiphase plasma arc field. This arc field continuously generates strong oxidants such as free radicals, ozone, and hydrogen peroxide, as well as arc photocatalytic effects, including shock waves, which disrupt organic molecular chains and eliminate organic matter and bacteria.

[0045] Under the underwater plasma arc, the Fe element in electrode block 524 produces nanoscale Fe₃O₄ magnetic material, which adsorbs onto the biomass carbon powder, transforming it into a magnetic substance. The treated clean water, carrying the magnetically modified biomass carbon powder, flows into magnetic separator 4. After magnetic separation by magnetic separator 4, the clean water flows into clean water storage tank 9 for storage. The biomass carbon powder separated by magnetic separation can be discharged into contaminated water tank 8 and mixed with sewage for reuse, reducing water treatment costs.

[0046] Therefore, this application has the following advantages:

[0047] 1. The multi-phase multi-stage underwater plasma discharge reactor 5 generates a large amount of highly active free radicals, hydrogen peroxide, ozone, shock waves, photoelectrocatalytic oxidation effects, and nanopowder adsorption effects in the water; it can not only eliminate pollution, but also kill microorganisms and viruses in the water.

[0048] 2. Discharge through a multi-phase multi-stage underwater plasma discharge reactor 5, and adjust the electrode material as needed to obtain one or more nano-powders of metal oxides such as TiO2, Al2O3, and Fe3O4 in water. These powders not only have an adsorption function, but also a catalytic function.

[0049] 3. The discharge is carried out by the multi-phase multi-stage underwater plasma discharge reactor 5, and the generated nano-scale powder is combined with the biomass carbon particles in the water to absorb harmful substances, especially the nano-scale Fe3O4 is adsorbed together with the biomass carbon particles, which has a magnetic modification effect, facilitating the repeated comprehensive utilization of the biomass carbon without the need for a regeneration process.

[0050] like Figure 6 As shown, in some embodiments of the present invention, a first sealing ring 5212 is provided between one side of the insulating ceramic plate 525 and the inner sidewall of the insulating electrode mounting sleeve 521, and between the other side of the insulating ceramic plate 525 and the sidewall of the electrode block 524. This facilitates sealing the connection between the insulating ceramic plate 525 and the insulating electrode mounting sleeve 521 via the first sealing ring 5212 to prevent water leakage.

[0051] like Figure 6 As shown, in some embodiments of the present invention, the reactor tube 51 is provided with an electrode mounting socket 53 communicating with the interior thereof, and the electrode mounting socket 53 has internal threads. An insulated electrode mounting sleeve 521 has external threads and is threadedly connected to the electrode mounting socket 53. A second sealing ring 54 is provided between the insulated electrode mounting sleeve 521 and the electrode mounting socket 53. This facilitates the rotational removal of the lower electrode assembly 52 and the installation of the electrode assembly 52 in the reactor tube 51, resulting in convenient operation.

[0052] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, flanges 55 are provided at both ends of the reactor tube 51. The present invention facilitates the installation of the reactor tube 51 by providing the flanges 55.

[0053] like Figure 2 、 Figure 7 and Figure 8 As shown, in some embodiments of the present invention, the reactor tube 51 is provided with a sight glass mounting tube 56 communicating with the interior thereof, and further includes a sight glass 57, which is provided in the sight glass mounting tube 56 and has a sight glass 58 disposed therein. Figure 7 and Figure 8 As shown, a third sealing ring 59 can be provided between the sight glass 58 and the sight tube 57 for sealing. The sight glass 58 of this embodiment uses a transparent lens, so that the plasma arc flash inside the reactor tube 51 can be observed through the sight glass 58. If the flash occurs, it indicates that the operation is normal.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application.

[0055] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of this application is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in this application. Any figure mark in the claims should not be regarded as limiting the claim involved. For those skilled in the art, various changes and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An underwater plasma and biochar synergistic water treatment device, comprising a pressure pump, a powder feeder, a tubular aerator, and a magnetic separator, characterized in that: The water outlet of the pressure pump is connected to the water inlet of the tubular aerator via a first connecting pipe, and the powder feeder is connected to the first connecting pipe; A multiphase multistage underwater plasma discharge reactor is provided between the water outlet end of the tubular aerator and the magnetic separator, one end of the multiphase multistage underwater plasma discharge reactor is connected to the water outlet end of the tubular aerator, and the other end of the multiphase multistage underwater plasma discharge reactor is connected to the magnetic separator via a second connecting pipe; The multiphase multistage underwater plasma discharge reactor includes a reactor tube and a plurality of electrode assemblies provided on the reactor tube, one end of the reactor tube is connected to the water outlet of the tubular aerator, and the other end of the reactor tube is connected to the second connecting pipe; the electrode assembly includes an insulated electrode mounting sleeve, an insulator, a conductive plate, an electrode block, and an insulating ceramic plate, one end of the insulated electrode mounting sleeve is a first connecting port, and the other end of the insulated electrode mounting sleeve is a second connecting port, the insulated electrode mounting sleeve is provided on the reactor tube, and the first connecting port is connected to the interior of the reactor tube; The insulator is embedded in the insulating electrode mounting sleeve and seals the second communication port; the conductive plate, the electrode block, and the insulating ceramic plate are all located in the insulating electrode mounting sleeve, the first communication port, the insulating ceramic plate, the electrode block, the conductive plate, and the insulator are arranged in sequence, and the electrode block and the conductive plate are electrically connected; the insulating ceramic plate is provided with a plurality of capillaries connecting the first communication port and the electrode block; A conductive spring is abutted between the conductive plate and the electrode block, the insulator is provided with a threading hole, the insulator is provided with an external thread, the insulating electrode mounting sleeve is provided with an internal thread, and the insulator is threadedly connected to the insulating electrode mounting sleeve.

2. The underwater plasma and biochar synergistic water treatment device according to claim 1, characterized in that: It also includes a contaminated water tank, a clean water storage tank and a mounting bracket. The water inlet end of the pressure pump is connected to the contaminated water tank; the magnetic separator is arranged on the mounting bracket and located above the clean water storage tank.

3. The underwater plasma and biochar synergistic water treatment device according to claim 1, characterized in that: A first sealing ring is provided between one side of the insulating ceramic plate and the inner side wall of the insulating electrode mounting sleeve, and between the other side of the insulating ceramic plate and the side wall of the electrode block.

4. The underwater plasma and biochar synergistic water treatment device according to claim 1, characterized in that: The reactor tube is provided with an electrode mounting tube seat connected to its interior, and the electrode mounting tube seat is provided with an internal thread; the insulated electrode mounting sleeve is provided with an external thread, and the insulated electrode mounting sleeve is threadedly connected to the electrode mounting tube seat; a second sealing ring is provided between the insulated electrode mounting sleeve and the electrode mounting tube seat.

5. The underwater plasma and biochar synergistic water treatment device according to claim 1, characterized in that: Both ends of the reactor tube are provided with flanges.

6. The underwater plasma and biochar synergistic water treatment device according to claim 1, characterized in that: The reactor tube is provided with a sight glass mounting tube communicated with the interior thereof, and further comprises a sight glass tube, wherein the sight glass is arranged in the sight glass mounting tube and the sight glass is arranged in the sight glass tube.

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