A multiphase and multistage underwater plasma discharge reactor

Abstract

The present invention provides a multiphase and multistage underwater plasma discharge reactor, which relates to the technical field of water treatment devices. A multiphase and multistage underwater plasma discharge reactor includes a reactor tube, and a plurality of electrode assemblies are arranged on the outer side wall of the reactor tube; each electrode assembly includes an insulating electrode mounting sleeve, an insulator, a conductive plate, an electrode block and an insulating ceramic plate; the conductive plate, the electrode block and the insulating ceramic plate are all located inside the insulating electrode mounting sleeve, a first communication port, the insulating ceramic plate, the electrode block, the conductive plate and the insulator are arranged in sequence, and the electrode block is electrically connected to the conductive plate; the insulating ceramic plate is provided with a plurality of capillary pores communicating the first communication port with the electrode block. By adopting the present invention, a large number of highly active free radicals, hydrogen peroxide, ozone, shock waves and photo-electrocatalytic oxidation effects are generated in water by using multiphase and multistage underwater plasma discharge, and at the same time, the biomass carbon powder is magnetically modified, which is convenient for the recovery and multiple uses of the biomass carbon powder, and reduces the water treatment cost.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment devices, and in particular to a multi-phase multi-stage underwater plasma discharge reactor. Background Art

[0002] The mainstream treatment method for high-fluoride water in my country is a composite method of active Al2O3 adsorption plus acid treatment regeneration. The latest and most efficient treatment methods for high-phosphorus, high-nitrogen, multi-metal and high-concentration organic polluted water bodies focus on magnetically modified biochar adsorption. Biomass pyrolysis carbon has a large specific surface area and many oxygen-containing functional groups, and has stronger cation exchange capacity and organic molecule binding ability. It is a rare adsorption material. The most important role of magnetic modification is to facilitate the recovery of the adsorption material to achieve the purpose of decontamination. However, its cost is high and the treatment process is long.

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

[0004] The existing invention patent with the Chinese publication number CN111203180A discloses a magnetic biochar composite adsorbent and its preparation method and application. The technology mainly involves impregnating biochar into a ferrous salt Fe(NO3)2 solution, baking it, and then heating it for curing. However, no matter what kind of iron salt is used, the subsequent process is almost unchanged, and the production cost is high. Summary of the invention

[0005] The purpose of the present invention is to provide a multiphase multistage underwater plasma discharge reactor, which can propose solutions to the deficiencies of the prior art. It 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, thereby generating a nanopowder adsorption effect, which can sterilize and disinfect the water body while synergistically adsorbing biomass carbon powder, and at the same time magnetically modify the biomass carbon powder, thereby facilitating the recovery and multiple use of the biomass carbon powder and reducing the cost of water treatment.

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

[0007] The embodiment of the present application provides a multi-phase multi-stage underwater plasma discharge reactor, comprising a reactor tube, wherein a plurality of electrode assemblies are arranged on the outer side wall of the reactor tube; the electrode assembly comprises an insulating electrode mounting sleeve, an insulator, a conductive plate, an electrode block and an insulating ceramic plate, wherein one end of the insulating electrode mounting sleeve is a first communication port, and the other end of the insulating electrode mounting sleeve is a second communication port; the insulating electrode mounting sleeve is arranged in the reactor tube, and the first communication port is communicated with the inside of the reactor tube;

[0008] The insulator is inserted into 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 inside 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 capillary holes communicating the first communication port with the electrode block.

[0009] Further, in some embodiments of the present invention, a conductive spring is abutted between the above-mentioned conductive plate and the electrode block.

[0010] Further, in some embodiments of the present invention, the above-mentioned insulator is provided with a wire passing hole, the insulator is provided with an external thread, and the insulating electrode mounting sleeve is provided with an internal thread, and the insulator is threadedly connected to the insulating electrode mounting sleeve.

[0011] Further, in some embodiments of the present invention, a first sealing ring is provided between one side of the above-mentioned 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.

[0012] Further, in some embodiments of the present invention, the above-mentioned reactor tube is provided with an electrode mounting socket communicating with its interior, and the electrode mounting socket is provided with an internal thread; the insulating electrode mounting sleeve is provided with an external thread, and the insulating electrode mounting sleeve is threadedly connected to the electrode mounting socket.

[0013] Further, in some embodiments of the present invention, a second sealing ring is provided between the above-mentioned insulating electrode mounting sleeve and the electrode mounting socket.

[0014] Further, in some embodiments of the present invention, flanges are provided at both ends of the above-mentioned reactor tube.

[0015] Further, in some embodiments of the present invention, the above-mentioned reactor tube is provided with a sight glass mounting tube communicating with its interior, and further includes a viewing tube. The viewing tube is arranged in the sight glass mounting tube, and a viewing sight glass is arranged inside the viewing tube.

[0016] Further, in some embodiments of the present invention, the above-mentioned sight glass mounting tube is provided with an external thread, the viewing tube is provided with an internal thread, and the viewing tube is threadedly connected to the sight glass mounting tube.

[0017] Further, in some embodiments of the present invention, a third sealing ring is provided between the above-mentioned viewing sight glass and the viewing tube.

[0018] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0019] An embodiment of the present invention provides a multiphase and multistage underwater plasma discharge reactor, which utilizes multiphase and multistage underwater plasma discharge to generate a large number of highly active free radicals, hydrogen peroxide, ozone, shock waves, and photo-catalytic oxidation effects in water, produce a nano-powder adsorption effect, and synergistically dispose of water bodies while sterilizing and detoxifying and adsorbing with biomass carbon powder. At the same time, the biomass carbon powder is magnetically modified, facilitating the recovery and multiple use of the biomass carbon powder and reducing the water treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the installation of the multiphase and multistage underwater plasma discharge reactor provided by the embodiment of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the multiphase and multistage underwater plasma discharge reactor provided by the embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the electrode assembly provided by the embodiment of the present invention;

[0024] Figure 4 It is an exploded view of the electrode assembly provided by the embodiment of the present invention;

[0025] Figure 5 It is a cross-sectional view of the multiphase and multistage underwater plasma discharge reactor provided by the embodiment of the present invention along the position of the electrode assembly;

[0026] Figure 6 It is a cross-sectional view of the electrode assembly provided by the embodiment of the present invention;

[0027] Figure 7 It is an exploded view of the sight tube, sight glass, and third sealing ring provided by the embodiment of the present invention;

[0028] Figure 8 It is a cross-sectional view of the multiphase and multistage underwater plasma discharge reactor provided by the embodiment of the present invention along the position of the sight tube.

[0029] Icons: 1 - pressure pump; 2 - powder feeder; 3 - tubular aerator; 4 - magnetic separator; 6 - first connecting pipe; 7 - second connecting pipe; 8 - polluted water tank; 9 - purified water storage tank; 10 - mounting bracket; 51 - reactor tube; 52 - electrode assembly; 53 - electrode mounting socket; 54 - second sealing ring; 55 - flange; 56 - sight glass mounting tube; 57 - observation tube; 58 - observation sight glass; 59 - third sealing ring; 521 - insulating electrode mounting sleeve; 522 - insulator; 523 - conductive plate; 524 - electrode block; 525 - insulating ceramic plate; 526 - first communication port; 527 - second communication port; 528 - capillary pore; 529 - conductive spring; 5211 - wire passing hole; 5212 - first sealing ring. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0031] Embodiment

[0032] Please refer to Figures 1 - 8 , this embodiment provides a multiphase and multistage underwater plasma discharge reactor, including a reactor tube 51, and a plurality of electrode assemblies 52 are provided on the outer side wall of the reactor tube 51; in this embodiment, 12 electrode assemblies 52 are arranged on each reactor tube 51, and the 12 electrode assemblies 52 are distributed on the outer side wall of the reactor tube 51 in three equal radial parts and four axial layers.

[0033] The electrode assembly 52 includes an insulating 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, and several are selected and used in combination according to process requirements. The conductive plate 523 is made of a conductive material such as a copper plate. One end of the insulating electrode mounting sleeve 521 is a first communication port 526, and the other end of the insulating electrode mounting sleeve 521 is a second communication port 527; the insulating electrode mounting sleeve 521 is arranged in the reactor tube 51 and the first communication port 526 is communicated with the inside of the reactor tube 51;

[0034] The insulator 522 is embedded in the insulating electrode mounting sleeve 521 and seals the second communication port 527; the conductive plate 523, the electrode block 524 and the insulating ceramic plate 525 are all located within the insulating electrode mounting sleeve 521. The first communication port 526, the insulating ceramic plate 525, the electrode block 524, the conductive plate 523, and the insulator 522 are arranged in sequence, and the electrode block 524 and the conductive plate 523 are electrically connected; the insulating ceramic plate 525 is provided with a plurality of capillary pores 528 that communicate the first communication port 526 with the electrode block 524. The capillary pores 528 are used for the sewage to contact the electrode block 524. After the sewage flows into the reactor tube 51, the sewage flows into the first communication port 526 and the capillary pores 528 and contacts the electrode block 524.

[0035] As Figure 1 shown, during installation, the multiphase multi-stage underwater plasma discharge reactor provided by the present application is installed and used together with the pressure pump 1, the powder feeder 2, the tube aerator 3, the magnetic separator 4, the polluted water tank 8, the purified water storage tank 9, and the installation bracket 10. During installation, the water outlet end of the pressure pump 1 and the water inlet end of the tube aerator 3 are connected through the first communication pipe 6, and the powder feeder 2 is connected to the first communication pipe 6;

[0036] The multiphase multi-stage underwater plasma discharge reactor is located between the water outlet end of the tube aerator 3 and the magnetic separator 4. One end of the reactor tube 51 is connected to the water outlet end of the tube aerator 3, and the other end of the reactor tube 51 and the magnetic separator 4 are connected through the second communication pipe 7. The water inlet end of the pressure pump 1 is connected to the polluted water tank 8; the magnetic separator 4 is arranged on the installation bracket 10 and is located above the purified water storage tank 9.

[0037] In the polluted water tank 8 of this embodiment, the sewage to be treated is stored. The powder feeder 2 can adopt an existing jet-suction type powder feeder. The powder feeder 2 stores biomass carbon powder, and the biomass carbon powder can be sent into the first communication pipe 6 through the powder feeder 2 to mix the biomass carbon powder with the sewage. The tube aerator 3 is an existing product and is used for aerating the sewage. The magnetic separator 4 can adopt an existing wet magnetic separator, which is used for magnetic separation of the magnetically modified biomass carbon powder to separate the magnetically modified biomass carbon powder from the treated purified water. One or more multiphase multi-stage underwater plasma discharge reactors of this embodiment can be used in combination. When multiple are used, they can be connected in series or in parallel. As Figure 1 shown, two multiphase multi-stage underwater plasma discharge reactors of this embodiment are used in parallel and connected in series with each other. The multiphase multi-stage underwater plasma discharge reactor of this embodiment is used to conduct electricity to perform plasma discharge on the sewage.

[0038] A conductive spring 529 is abutted between the conductive plate 523 and the electrode block 524 in the embodiment. The conductive spring 529 is made of metal and has the ability to conduct electricity, allowing current to flow through the conductive plate 523 and the conductive spring 529 to the electrode block 524 to make the electrode block 524 charged.

[0039] The insulator 522 is provided with a wire passing hole 5211. The insulator 522 is provided with an external thread, and the insulating electrode mounting sleeve 521 is provided with an internal thread. The insulator 522 is threadedly connected to the insulating electrode mounting sleeve 521. By threadedly connecting the insulator 522 to the insulating electrode mounting sleeve 521, it is convenient to disassemble the insulator 522 to replace various internal components, and it is also convenient to rotatably install the insulator 522 to seal the second communication port 527. A wire passing hole 5211 is provided on the insulator 522. During use, an electric wire passes through the wire passing hole 5211 and is connected to the conductive plate 523. The 12 electrode assemblies 52 in this embodiment are respectively and independently connected to electric wires, and electric power is supplied through a 12-phase power supply, so that a polyphase and multi-stage current can be formed to discharge and treat sewage.

[0040] During actual use, the pressure pump 1 pumps the sewage stored in the polluted water tank 8 into the polyphase and multi-stage underwater plasma discharge reactor through the first communication pipe 6 and the tubular aerator 3. When the sewage flows through the first communication pipe 6, the feeder 2 feeds the biomass carbon powder into the first communication pipe 6 so that the biomass carbon powder is mixed with the sewage. When the sewage enters the polyphase and multi-stage underwater plasma discharge reactor, the sewage flows into each first communication port 526 and the capillary pores 528 and contacts the electrode block 524. One phase of the external polyphase AC power supply is connected to a lead wire. After passing through the wire passing hole 5211 of the insulator 522, it is connected to the conductive plate 523. At this time, the conductive plate 523 is charged, and the current is transmitted through the conductive spring 529 to make the electrode block 524 charged. The electrode block 524 contacts the conductive sewage aqueous solution through the multiple capillary pores 528 on the insulating ceramic plate 525, and sends electric power into the sewage aqueous solution in the reactor tube 51.

[0041] When the current of the electrode block 524 flows through the capillary pores 528, the sewage aqueous solution generates water vapor bubbles due to heat. Under the application of voltage, the bubbles are broken down into fine electric arcs, that is, capillary discharge. Since the capillary discharge continuously generates bubbles and continuously breaks down to form an underwater plasma arc, the entire area of the aqueous solution to be treated is filled with an underwater polyphase plasma arc field. In this arc field, strong oxidants such as free radicals, ozone, and hydrogen peroxide are continuously generated, as well as the arc photocatalysis effect, including shock waves, etc., to break the organic molecule chains and eliminate organic substances and bacteria, etc.

[0042] In the electrode block 524, Fe elements generate nano-scale Fe3O4 magnetic substances under the underwater plasma arc and adsorb on the biomass carbon powder, so that the biomass carbon powder is modified into a magnetic substance. The purified water carrying the magnetically modified biomass carbon powder after such treatment flows into the magnetic separator 4. After magnetic separation by the magnetic separator 4, the purified water flows into the purified water storage tank 9 for storage. The biomass carbon powder separated by magnetic separation can be discharged into the polluted water tank 8 again to be mixed with the sewage for reuse, reducing the water treatment cost.

[0043] Therefore, the present application has the following advantages:

[0044] 1. By discharging through a multiphase and multistage underwater plasma discharge reactor, a large number of highly active free radicals, hydrogen peroxide, ozone, shock waves, and photo-catalytic oxidation effects are generated in water, producing a nano-powder adsorption effect; it can not only eliminate pollution but also kill waterborne microorganisms and viruses.

[0045] 2. By discharging through a multiphase and multistage underwater plasma discharge reactor, the electrode material can be adjusted as needed to obtain one or more nano-scale powders of metal oxides such as TiO2, Al2O3, and Fe3O4 in water. In addition to the adsorption effect, these powders also have a catalytic effect.

[0046] 3. By discharging through a multiphase and multistage underwater plasma discharge reactor, the nano-scale powders generated combine with biomass carbon particles in water to adsorb harmful substances. In particular, nano-scale Fe3O4 adsorbs with biomass carbon particles, achieving a magnetic modification effect, facilitating the recycling and repeated comprehensive utilization of biomass carbon without a regeneration process.

[0047] As Figure 6 shown, in some embodiments of the present invention, first sealing rings 5212 are provided between one side of the insulating ceramic plate 525 and the inner side wall of the insulating electrode mounting sleeve 521, and between the other side of the insulating ceramic plate 525 and the side wall of the electrode block 524. Thus, it is convenient to seal the connection between the insulating ceramic plate 525 and the insulating electrode mounting sleeve 521 through the first sealing rings 5212 to prevent water leakage.

[0048] As Figure 6 shown, in some embodiments of the present invention, the reactor tube 51 is provided with an electrode mounting socket 53 communicating with its interior, and the electrode mounting socket 53 is provided with internal threads; the insulating electrode mounting sleeve 521 is provided with external threads, and the insulating electrode mounting sleeve 521 is threadedly connected to the electrode mounting socket 53. A second sealing ring 54 is provided between the insulating electrode mounting sleeve 521 and the electrode mounting socket 53. Thus, it is convenient to rotate and disassemble the electrode assembly 52, and it is also convenient to install the electrode assembly 52 on the reactor tube 51, with convenient operation.

[0049] As Figure 1 and Figure 2 shown, in some embodiments of the present invention, flanges 55 are provided at both ends of the reactor tube 51. By providing the flanges 55 in the present invention, it is convenient to install the reactor tube 51.

[0050] As Figure 2 、 Figure 7 and Figure 8As shown, in some embodiments of the present invention, the above-mentioned reactor tube 51 is provided with a sight glass mounting tube 56 communicating with its interior, and further includes a lookout tube 57. The lookout tube 57 is arranged in the sight glass mounting tube 56, and a lookout sight glass 58 is arranged in the lookout tube 57. A third sealing ring 59 is arranged between the lookout sight glass 58 and the lookout tube 57. The lookout sight glass 58 of this embodiment adopts a transparent lens, so that the plasma arc flash inside the reactor tube 51 can be viewed through the lookout sight glass 58. If there is a flash, it means that the operation is normal at this time.

[0051] As Figure 7 and Figure 8 As shown, in some embodiments of the present invention, the above-mentioned sight glass mounting tube 56 is provided with an external thread, and the lookout tube 57 is provided with an internal thread. The lookout tube 57 is threadedly connected to the sight glass mounting tube 56. In this way, it is convenient to rotate and disassemble the lookout tube 57 to install or replace the lookout sight glass 58.

[0052] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, it is obvious that this application is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of this application, this application can be implemented in other specific forms.

[0053] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of this application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in this application. Any reference signs in the claims should not be regarded as limiting the claims involved. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multiphase and multistage underwater plasma discharge reactor, comprising a reactor tube, characterized in that: A plurality of electrode assemblies are provided on the outer side wall of the reactor tube; each electrode assembly includes an insulating electrode mounting sleeve, an insulator, a conductive plate, an electrode block, and an insulating ceramic plate. One end of the insulating electrode mounting sleeve is a first communication port, and the other end of the insulating electrode mounting sleeve is a second communication port; the insulating electrode mounting sleeve is provided on the reactor tube and the first communication port communicates with the inside 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 inside 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 is electrically connected to the conductive plate; the insulating ceramic plate is provided with a plurality of capillary pores communicating the first communication port with the electrode block. A conductive spring is abutted between the conductive plate and the electrode block. The insulator is provided with a wire passing hole, the insulator is provided with an external thread, and the insulating electrode mounting sleeve is provided with an internal thread. The insulator is threadedly connected to the insulating electrode mounting sleeve.

2. A multiphase and multistage underwater plasma discharge reactor 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.

3. The multi-phase and multi-stage underwater plasma discharge reactor according to claim 1, characterized in that: The reactor tube is provided with an electrode mounting pipe seat communicating with its inside, and the electrode mounting pipe seat is provided with an internal thread; the insulating electrode mounting sleeve is provided with an external thread, and the insulating electrode mounting sleeve is threadedly connected to the electrode mounting pipe seat.

4. A multiphase and multistage underwater plasma discharge reactor according to claim 3, characterized in that: A second sealing ring is provided between the insulating electrode mounting sleeve and the electrode mounting pipe seat.

5. A multiphase and multistage underwater plasma discharge reactor according to claim 1, characterized in that: Flange plates are provided at both ends of the reactor tube.

6. A multiphase and multistage underwater plasma discharge reactor according to claim 1, characterized in that: The reactor tube is provided with a sight glass mounting pipe communicating with its inside, and further includes a viewing pipe. The viewing pipe is provided in the sight glass mounting pipe, and a viewing sight glass is provided inside the viewing pipe.

7. A multiphase and multistage underwater plasma discharge reactor according to claim 6, characterized in that: The sight glass mounting pipe is provided with an external thread, the viewing pipe is provided with an internal thread, and the viewing pipe is threadedly connected to the sight glass mounting pipe.

8. A multiphase and multistage underwater plasma discharge reactor according to claim 6, characterized in that: A third sealing ring is provided between the viewing sight glass and the viewing pipe.

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