Advanced wastewater treatment equipment with wastewater recycling function

Abstract

The invention discloses wastewater advanced treatment equipment with a wastewater recycling function, and belongs to the field of environmental protection and wastewater multi-stage treatment.The wastewater advanced treatment equipment comprises a shell and a liquid inlet part arranged on one side of the shell, and a pulsed electric field reaction treatment part, an electrolytic oxidation part and a magnetic flocculation separation part are arranged in the shell; the pulsed electric field reaction treatment part comprises a treatment cavity I formed in the shell and communicated with the liquid inlet part, a hollow ring body fixedly connected to the inner wall of the treatment cavity I, and a cathode I fixedly connected to the inner wall of the hollow ring body; a pulsed electric field can be formed in the treatment cavity I through an anode in the center of the treatment cavity I and a cathode I on the inner wall of the treatment cavity I, and macromolecular organic matters in the wastewater are subjected to electron bombardment, electrostriction and electroporation effects under the action of the high-intensity electric field; chemical bonds are selectively broken, so that ring opening and chain scission are realized, and the compound is converted into small and medium molecular fragments which are easier to be oxidized subsequently; efficient physical sterilization is realized, and biotoxicity is eliminated.

Description

Technical Field

[0001] This invention relates to the field of environmental protection and multi-stage wastewater treatment, and more specifically, to a wastewater deep treatment device with wastewater reuse function. Background Technology

[0002] Laboratory wastewater (especially wastewater discharged from environmental laboratories) is characterized by small total discharge volume, dispersed discharge points, and complex pollutant composition. It typically contains high concentrations of recalcitrant macromolecular organic matter, heavy metal ions, and pathogenic microorganisms. Due to the extremely high energy stability and chemical inertness of its molecular structure, traditional urban wastewater treatment processes and conventional physicochemical methods often fail to completely purify this type of wastewater.

[0003] In the field of laboratory wastewater treatment, advanced oxidation technology is regarded as a key path to achieve deep purification of wastewater due to its high efficiency in decomposing recalcitrant organic pollutants. Among them, electrolytic catalytic oxidation technology greatly improves the reaction interface and mass transfer efficiency by constructing a particle electrode bed, making it suitable for treating laboratory organic wastewater with complex composition and high toxicity.

[0004] However, this technology has some problems in practical applications: its efficient catalytic oxidation function depends on the quality of the influent water; if the wastewater contains a large number of bioactive substances (such as bacteria and algae) or macromolecular organic matter with complex spatial structures, they will cover the surface of the particle electrode and the main electrode, which will quickly lead to the poisoning and deactivation of the catalytic active sites and the sharp decline in reactor efficiency.

[0005] While existing pretreatment processes (such as conventional filtration and coagulation sedimentation) can remove some suspended solids, their core drawback lies in their inability to effectively break down the chemical structures of large molecules or reliably inactivate biotoxicity in wastewater. Regarding biotoxicity inactivation, existing ultraviolet disinfection technology is easily limited by the high turbidity and complex color of laboratory wastewater, resulting in insufficient penetration and shadowing effects, making complete eradication difficult. Traditional chemical disinfection (such as adding chlorine-based or ozone oxidants) often introduces persistent secondary pollution and may even produce more toxic byproducts (such as trihalomethanes), and residual strong oxidants can severely interfere with the electrochemical reaction balance of subsequent electrolytic oxidation modules. Furthermore, while high-temperature and high-pressure sterilization methods commonly used in laboratory environments are relatively effective, their extremely high energy consumption and long treatment cycles cannot meet the requirements of immediate treatment and energy conservation in laboratory wastewater treatment. Therefore, existing pretreatment methods generally cannot provide ideal and physicochemically stable influent conditions for subsequent electrolytic oxidation units. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of this invention is to provide a wastewater deep treatment device with wastewater reuse function.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A wastewater deep treatment device with wastewater reuse function includes a shell and a liquid inlet section disposed on one side of the shell. The shell is provided with a pulse electric field reaction treatment section, an electrolytic oxidation section and a magnetic flocculation separation section.

[0009] The pulsed electric field reaction processing unit includes a processing chamber I opened inside the housing and connected to the liquid inlet; a hollow ring fixed to the inner wall of the processing chamber I; a cathode I fixed to the inner wall of the hollow ring; a partition fixed to the upper end of the hollow ring and sealed to the inner wall of the processing chamber I; a top plate I fixed above the partition and sealed to the inner wall of the processing chamber I; a conductive slip ring fixed inside the top plate I; a main shaft with one end connected to the inner bottom wall of the processing chamber I and the other end passing through the partition and connected to the rotor of the conductive slip ring; an anode I fixed outside the main shaft; and a pulse power supply fixed to the upper end of the top plate I, wherein the positive and negative terminals of the pulse power supply are respectively connected to the conductive slip ring and the cathode I.

[0010] Furthermore, one end of the main shaft is rotatably connected to the bottom wall of the processing chamber and the other end passes through the partition and is rotatably connected to the top plate; a motor is fixedly connected to the upper end of the top plate, and the output shaft of the motor is connected to the rotor of the conductive slip ring.

[0011] Furthermore, a plurality of needle-shaped protrusions are fixedly attached to the outer surface of the cathode, and a plurality of needle-shaped protrusions are fixedly attached to the outer surface of the anode, wherein the needle-shaped protrusions are arranged in an axially staggered manner.

[0012] Furthermore, a sealed chamber is formed between the partition and the top plate in the processing chamber, and a drain outlet connected to the sealed chamber is provided on one side of the housing. A dynamic seal is provided at the rotatable connection between the main shaft, the partition, and the top plate.

[0013] Furthermore, a tangential liquid inlet is provided inside the housing, and the tangential liquid inlet connects the processing chamber one with the liquid inlet section.

[0014] Furthermore, the processing chamber is also connected to a swirling assembly, which includes multiple swirling blades fixed to the outside of the main shaft, a sleeve fixed to the bottom wall of the processing chamber and movably sleeved to the outside of the main shaft, and a spiral guide plate fixed to the outside of the sleeve. The spiral guide plate is used to guide the liquid discharged from the tangential inlet.

[0015] Furthermore, the liquid inlet includes a liquid inlet pipe fixed to one side of the housing and connected to a tangential liquid inlet, an inlet end and a throat opened inside the liquid inlet pipe, a swirling flange integrally formed on the inner wall of the throat, an air inlet opened outside the liquid inlet pipe and connected to the throat, an ozone gas generator fixed to one side of the housing, and a permanent magnet fixed to the outside of the liquid inlet pipe, and the output end of the ozone gas generator is connected to the air inlet through a pipe.

[0016] Furthermore, the electrolytic oxidation unit includes a second processing chamber opened inside the shell, a first flow channel opened inside the shell and connecting the first processing chamber and the second processing chamber, an aeration assembly fixed to the inner wall of the second processing chamber, a water distribution plate fixed to the inner wall of the second processing chamber, a second anode fixed to the inner wall of the second processing chamber, a second cathode fixed to the upper end of the second water distribution plate, a second top plate fixed to the opening of the inner wall of the second processing chamber and sealed to the inner wall of the second processing chamber, and a modified body located between the second anode and the second cathode.

[0017] Furthermore, the magnetic flocculation separation unit includes an extension seat integrally formed on one side of the shell, a processing chamber three opened inside the extension seat, a flow channel two opened inside the shell connecting the processing chamber three and the processing chamber two, a support plate fixed to the inner wall of the processing chamber three, multiple slots opened on the support plate, a top plate three fixed to the opening of the processing chamber three and sealed to the inner wall of the processing chamber two, a stirring blade with both ends rotatably connected to the lower end of the top plate three and the upper end of the support plate respectively, a motor two fixed to the upper end of the top plate three, and a feeding port opened on the upper end of the top plate three, and the output shaft of the motor two passes through the top plate three and is connected to the stirring blade.

[0018] Furthermore, the lower end of the extension seat is integrally formed with an extension outlet, and a permanent magnet ring assembly is slidably connected to the outside of the extension outlet. A limiting flange is fixed to the outside of the extension outlet, and a material-blocking flange is fixed to the inner wall of the extension outlet.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This scheme is equipped with a pulsed electric field reaction treatment unit. A pulsed electric field can be formed in the treatment chamber through the anode in the center of the treatment chamber and the cathode on the inner wall of the treatment chamber. Under the action of the high-intensity electric field, the large molecular organic matter (such as aromatic rings and long-chain hydrocarbons) in the wastewater undergoes electron bombardment, electrostriction and electroporation effects. Their chemical bonds are selectively broken, realizing ring opening and chain breaking, and transforming them into small and medium molecular fragments that are more easily oxidized in the subsequent process. In addition, the high-voltage pulse can instantly break through the cell membrane of microorganisms (electroporation effect), destroy their enzyme system and genetic material, realize efficient physical sterilization, and eliminate biological toxicity. No chemical agents are added in the whole process, avoiding secondary pollution byproducts caused by oxidants such as chlorine and ozone, and also eliminating the interference of residual oxidants on the subsequent electrolytic oxidation unit.

[0020] (2) In this scheme, needle-shaped protrusions are provided on both anode one and cathode one. The needle-shaped protrusions on anode one and cathode one constitute a large number of micron-level tips, which generate local electric field distortion under high voltage pulse and form high-density electron emission points. This makes the electrical energy more concentrated on the pollutant molecules, improves the energy density and utilization efficiency of the pulse electric field, and reduces the pulse intensity threshold or shortens the treatment time required for macromolecular chain breaking and microbial inactivation. The rotating anode needle and the stationary cathode needle are arranged in an axially staggered manner. During the rotation, the relative position with the cathode needle is constantly changed, so that the high-intensity discharge area (between the needle tips) in the reactor is no longer fixed, but sweeps across the entire reaction space over time. A high-frequency shearing counteracting electric field network is formed, generating an electric field gradient, which can generate micro-discharge channels with extremely high energy levels, tearing the spatial structure of complex organic matter (such as benzene rings and heterocycles), and physically and electrically breaking the microbial cell membrane. This solves the problem of local electric field attenuation that may exist in static electrodes, and improves the uniformity and reliability of the treatment.

[0021] (3) This scheme has a swirling impeller on the rotating central axis, and a spiral guide plate is set below the swirling impeller in the first treatment chamber. The spiral guide plate at the bottom pre-structures the tangential water inlet, and organizes the initial chaotic vortex into a regular spiral upward flow. This avoids the attenuation and instability of the swirling flow inside the chamber, and ensures that a regular spiral flow field is formed in the first treatment chamber from bottom to top. Combined with the pushing of the swirling impeller, it can extend the effective residence time of the wastewater in the reaction core area to a certain extent; it increases the probability of it passing through the high voltage discharge area between different needle tips multiple times, which is equivalent to receiving multiple pulse treatments, and fully degrading stubborn pollutants.

[0022] (4) This scheme is equipped with an inlet pipe and a permanent magnet section. The negative pressure in the throat will efficiently absorb ozone and instantly shear and mix it into micro-nano bubbles. When these ozone bubbles enter the high-voltage pulse electric field region, the micro-bubbles will undergo dielectric breakdown and explosive collapse (micro-explosion effect) under the strong electric field, generating extremely high concentrations of hydroxyl radicals in situ. This results in two parallel and synergistic degradation pathways, direct electron bombardment (physical) and free radical oxidation (chemical), existing simultaneously in the treatment chamber. The treatment mechanism changes from a single to a complex and multi-faceted one. The Lorentz force and magnetic treatment effect applied by the permanent magnet section outside the throat not only deflect the charged particles, but also the magnetization effect can polarize water molecule clusters and weaken the bond energy of organic pollutants, making the molecular structure metastable. This is equivalent to untying the pollutants before they enter the high-voltage electric field, which greatly reduces the energy threshold required for subsequent electrical breakdown and free radical attack, further reducing the power consumption of the pulse electric field and producing a nonlinear improvement in treatment efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the tangential liquid inlet structure of the present invention; Figure 4 This is a schematic diagram of the hollow ring, needle-shaped protrusion one, and needle-shaped protrusion two of the present invention; Figure 5 This is a schematic diagram of the spiral guide plate and swirl impeller structure of the present invention; Figure 6 This is a schematic diagram of the liquid inlet section structure of the present invention; Figure 7 This is a schematic diagram of the modified body structure of the present invention; Figure 8 This is a schematic diagram of the slotted structure of the present invention.

[0024] Explanation of the labels in the diagram: 1. Shell; 11. Processing Chamber 1; 12. Processing Chamber 2; 13. Flow Channel 1; 14. Flow Channel 2; 15. Drain; 2. Pulsed Electric Field Reaction Processing Unit; 21. Hollow Ring; 211. Tangential Liquid Inlet; 22. Cathode 1; 221. Needle-shaped Protrusion 1; 23. Main Shaft; 24. Anode 1; 241. Needle-shaped Protrusion 2; 25. Pulsed Power Supply; 26. Partition; 27. Top Plate 1; 28. Conductive Slip Ring; 29. ​​Motor 1; 3. Swirl Assembly; 31. Sleeve; 32. Spiral Guide Plate; 33. Swirl Blade; 4. Electrolytic Oxidation Unit; 41. Aeration Assembly; 4 2. Water distribution plate; 43. Cathode II; 44. Anode II; 45. Top plate II; 46. Modified body; 5. Liquid inlet; 51. Liquid inlet pipe; 52. Inlet end; 53. Throat; 54. Swirl flange; 55. Air inlet; 56. Ozone gas generator; 57. Permanent magnet; 6. Magnetic flocculation separation section; 61. Extension seat; 62. Processing chamber III; 63. Top plate III; 631. Dosing port; 64. Motor II; 65. Support plate; 651. Groove; 66. Stirring blade; 67. Extended liquid outlet; 671. Material retaining flange; 672. Limiting flange; 68. Permanent magnet ring assembly. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1 to 8 A wastewater deep treatment device with wastewater reuse function includes a shell 1 and a liquid inlet 5 disposed on one side of the shell 1. The shell 1 is provided with a pulse electric field reaction treatment section 2, an electrolytic oxidation section 4 and a magnetic flocculation separation section 6. The pulsed electric field reaction processing unit 2 includes a processing chamber 11 opened inside the housing 1 and connected to the liquid inlet 5; a hollow ring 21 fixed to the inner wall of the processing chamber 11; a cathode 22 fixed to the inner wall of the hollow ring 21; a partition 26 fixed to the upper end of the hollow ring 21 and sealed to the inner wall of the processing chamber 11; a top plate 27 fixed above the partition 26 and sealed to the inner wall of the processing chamber 11; a conductive slip ring 28 fixed inside the top plate 27; a main shaft 23 with one end connected to the bottom wall of the processing chamber 11 and the other end passing through the partition 26 and connected to the rotor of the conductive slip ring 28; an anode 24 fixed to the outside of the main shaft 23; and a pulse power supply 25 fixed to the upper end of the top plate 27, wherein the positive and negative terminals of the pulse power supply 25 are respectively connected to the conductive slip ring 28 and the cathode 22.

[0027] By adopting the above technical solution, a wire connecting the conductive slip ring 28 rotor to the anode 24 is threaded inside the main shaft 23. When the main shaft 23 rotates, this design of connecting the conductive slip ring 28 to the main shaft 23 ensures that the anode 24 can operate normally. After preliminary filtration and sedimentation, the laboratory wastewater enters the treatment chamber 11 through the inlet 5 and moves upwards from inside the treatment chamber 11. The pulse power supply 25 can generate high-voltage pulses (10-30kV). The high voltage pulse (1-5 kHz) allows the anode-24 and cathode-22 to form a pulsed electric field within the treatment chamber-11. When wastewater passes between the anode-24 and cathode-22, the large organic molecules in the wastewater (such as aromatic rings and long-chain hydrocarbons) undergo electron bombardment, electrostriction, and electroporation under the influence of the high-intensity electric field. Their chemical bonds are selectively broken, achieving ring opening and chain breaking, transforming them into smaller molecular fragments that are more easily oxidized subsequently. Furthermore, the high-voltage pulse can instantly penetrate the cell membrane of microorganisms (electroporation effect), destroying their enzyme system and genetic material, achieving efficient physical sterilization and eliminating biotoxicity. The entire process does not involve the addition of any chemical agents, avoiding secondary pollution byproducts from oxidants such as chlorine and ozone, and also eliminating interference from residual oxidants to subsequent electrolytic oxidation units.

[0028] like Figures 2-4 As shown, one end of the main shaft 23 is rotatably connected to the bottom wall of the processing chamber 11, and the other end passes through the partition 26 and is rotatably connected to the top plate 27; a motor 29 is fixedly connected to the upper end of the top plate 27, and the output shaft of the motor 29 is connected to the rotor of the conductive slip ring 28.

[0029] The outer surface of the cathode 22 is fixed with a plurality of needle-shaped protrusions 221, and the outer surface of the anode 24 is fixed with a plurality of needle-shaped protrusions 241. The needle-shaped protrusions 221 and 241 are arranged in an axially staggered manner.

[0030] A sealed chamber is formed between the partition 26 and the top plate 27 located in the processing chamber 11. A drain outlet 15 connected to the sealed chamber is provided on one side of the housing 1. A dynamic sealing part is provided at the rotatable connection between the main shaft 23 and the partition 26 and the top plate 27.

[0031] By adopting the above technical solution, needle-shaped protrusions 241 and 221 are respectively provided on anode 24 and cathode 22. The needle-shaped protrusions on anode 24 and cathode 22 constitute a large number of micron-level tips, which generate local electric field distortion under high voltage pulses, forming high-density electron emission points. This makes the electrical energy act more concentrated on pollutant molecules, improves the energy density and utilization efficiency of the pulse electric field, and reduces the pulse intensity threshold or shortens the processing time required for macromolecular chain breaking and microbial inactivation. The output shaft of motor 29 drives the rotor of conductive slip ring 28 to rotate, and the rotation of conductive slip ring 28 drives the main shaft 23 and anode 24 in the processing chamber. In the rotating process, the rotating needle-like protrusions 241 and the stationary needle-like protrusions 221 are arranged axially in an alternating pattern. During the rotation, the relative position of the rotating protrusions 241 and 221 is constantly changing, so that the high-intensity discharge area (between the needle tips) in the reactor is no longer fixed, but sweeps across the entire reaction space over time. This forms a high-frequency shear counter-current electric field network, generates an electric field gradient, and can produce micro-discharge channels with extremely high energy levels. This tears apart the spatial structure of complex organic matter (such as benzene rings and heterocycles) and performs physical and electrical dual disruption of microbial cell membranes. This solves the problem of local electric field attenuation that may exist in static electrodes, and improves the uniformity and reliability of the treatment.

[0032] like Figure 2 , Figure 3 , Figure 5 As shown, a tangential liquid inlet 211 is provided inside the housing 1, and the tangential liquid inlet 211 connects the processing chamber 11 to the liquid inlet section 5.

[0033] The processing chamber 11 is also connected to a swirling assembly 3, which includes multiple swirling blades 33 fixed to the outside of the main shaft 23, a sleeve 31 fixed to the bottom wall of the processing chamber 11 and movably sleeved to the outside of the main shaft 23, and a spiral guide plate 32 fixed to the outside of the sleeve 31. The spiral guide plate 32 is used to guide the liquid discharged from the tangential inlet 211.

[0034] By adopting the above technical solution, wastewater enters the tangential inlet 211 through the inlet section 5, and exits from the tangential inlet 211. It then flows tangentially into the treatment chamber 11 along the inner wall of the treatment chamber 11, causing the wastewater to rotate and rise within the cylindrical treatment chamber 11. At the same time, the spiral guide plate 32 can also guide the rotating water flow in a spiral manner, pre-structure the tangential inlet water, and organize the initial chaotic vortex into a regular spiral upward flow. This avoids the attenuation and instability of the vortex inside the chamber, ensuring that a regular spiral flow field is formed in the treatment chamber 11 from bottom to top. Meanwhile, the vortex blades 33 rotate with the main shaft 23. The liquid guided by the spiral guide plate 32, combined with the pushing of the vortex blades 33, can extend the effective residence time of the wastewater in the reaction core area to a certain extent. This increases the probability of it passing through different high-voltage discharge areas between needle tips multiple times, which is equivalent to receiving multiple pulse treatments, thus fully degrading stubborn pollutants.

[0035] like Figure 1 and Figure 6 As shown, the liquid inlet 5 includes a liquid inlet pipe 51 fixed to one side of the housing 1 and connected to a tangential liquid inlet 211, an inlet end 52 and a throat 53 opened inside the liquid inlet pipe 51, a swirl flange 54 integrally formed on the inner wall of the throat 53, an air inlet 55 opened outside the liquid inlet pipe 51 and connected to the throat 53, an ozone gas generator 56 fixed to one side of the housing 1, and a permanent magnet part 57 fixed to the outside of the liquid inlet pipe 51. The output end of the ozone gas generator 56 is connected to the air inlet 55 through a pipe.

[0036] By adopting the above technical solution, wastewater enters the inlet pipe 51 and first passes through the inlet end 52. When it enters the throat 53 from the inlet end 52, the liquid flow rate in the throat 53 increases (Venturi effect). At the same time, the ozone gas generator 56 generates ozone gas and enters the throat 53 through the air inlet 55. The negative pressure in the throat 53 efficiently draws in the ozone and instantly shears and mixes it into micro-nano bubbles. Simultaneously, the swirling flange 54 in the throat 53 guides the liquid to generate swirling flow in the throat 53. When the ozone subsequently enters the high-voltage pulsed electric field region, the microbubbles undergo dielectric breakdown and explosive collapse under the strong electric field (micro-explosion effect), generating extremely high concentrations of hydroxyl radicals in situ, making the treatment chamber... Within 11, two parallel and synergistic degradation pathways exist simultaneously: direct electron bombardment (physical) and free radical oxidation (chemical), transforming the treatment mechanism from a single to a complex and multifaceted one. When the liquid passes through the throat 53, the Lorentz force and magnetic treatment effect applied by the permanent magnet 57 outside the throat 53 not only pre-deflect the charged particles but also, through its magnetization effect, polarize water molecule clusters and weaken the bond energy of organic pollutants, bringing the molecular structure to a metastable state. This is equivalent to pre-untying the pollutants before they enter the high-voltage electric field, significantly reducing the energy threshold required for subsequent electrical breakdown and free radical attack, further reducing the energy consumption of the pulsed electric field, and resulting in a nonlinear improvement in treatment efficiency.

[0037] like Figure 2 , Figure 7 As shown, the electrolytic oxidation unit 4 includes a second processing chamber 12 opened inside the shell 1, a flow channel 13 opened inside the shell 1 and connecting the first processing chamber 11 and the second processing chamber 12, an aeration assembly 41 fixed to the bottom wall of the second processing chamber 12, a water distribution plate 42 fixed to the inner wall of the second processing chamber 12, an anode 44 (using special boron-doped diamond) fixed to the inner wall of the second processing chamber 12, a cathode 43 fixed to the upper end of the water distribution plate 42, a top plate 45 fixed to the opening of the inner wall of the second processing chamber 12 and sealed to the inner wall of the second processing chamber 12, and a modified body 46 (using modified granular activated carbon or porous iron-carbon ceramic balls) located between the anode 44 and the cathode 43; the anode 44 and the cathode 43 are respectively connected to the positive and negative terminals of the pulse power supply 25. By adopting the above technical solution, the liquid in the upper layer of the treatment chamber 11 enters the lower layer of the treatment chamber 2 12 through the flow channel 13 and rises in the treatment chamber 2 12; during this process, the aeration component 41 releases fine bubbles, generating a uniformly rising bubble flow; at the same time, after the pulse power supply 25 is energized, the anode 2 44 and the cathode 2 43 are activated, and each modified body 46 filled between the anode 2 44 and the cathode 2 43 will be induced polarized under the action of the electric field, forming a third electrode; Due to the presence of the modifier 46, the wastewater must take a tortuous path between the anode 44 and the cathode 43. This violent disturbance ensures that pollutant molecules can quickly come into contact with the electrode surface, thereby increasing the reaction surface area. No matter which gap the pollutants in the wastewater flow into, they can react with the electrode surface. The special boron-doped diamond anode 44 can directly break down water molecules, generating highly oxidizing "hydroxyl radicals." This substance acts like a chemical scalpel, cutting up the originally stable organic chains in wastewater and ultimately converting them into harmless carbon dioxide and water. As the wastewater and bubbles vertically upward through the water distribution plate 42 and enter the particle-filled bed composed of multiple modifiers 46, the pollutants in the wastewater are captured by the dense particle electrodes within microseconds and attacked by hydroxyl radicals. As the wastewater moves upward, the concentration of organic matter gradually decreases, and long-chain organic matter is broken down into short chains step by step, eventually mineralizing. The treated liquid flows out from the flow channel 14 above the treatment chamber 12 and enters the treatment chamber 62. At this time, the organic matter in the wastewater has been basically converted into gas or extremely small suspended particles.

[0038] like Figure 2 , Figure 8As shown, the magnetic flocculation separation unit 6 includes an extension seat 61 integrally formed on one side of the housing 1, a processing chamber 3 62 opened inside the extension seat 61, a flow channel 2 14 opened inside the housing 1 to connect the processing chamber 3 62 with the processing chamber 2 12, a support plate 65 fixed to the inner wall of the processing chamber 3 62, a plurality of slots 651 opened on the support plate 65, a top plate 3 63 fixed to the opening of the processing chamber 3 62 and sealed to the inner wall of the processing chamber 3 62, a stirring blade 66 with both ends rotatably connected to the lower end of the top plate 3 63 and the upper end of the support plate 65 respectively, a motor 2 64 fixed to the upper end of the top plate 3 63, and a feeding port 631 opened at the upper end of the top plate 3 63, and the output shaft of the motor 2 64 passes through the top plate 3 63 and is connected to the stirring blade 66. By adding magnetic seed particles (mainly micron-sized iron(III) oxide) and flocculants with high magnetic permeability to the wastewater in the treatment chamber 62 through the dosing port 631, under the charge neutralization and bridging effect of the flocculant (such as polyacrylamide), the fine colloidal particles in the wastewater, the heavy metal precipitates generated by electrolysis, and the broken biological remains are strongly wrapped on the surface of the magnetic seeds, forming large magnetic flocs with high magnetic response. The lower end of the extension seat 61 is integrally formed with an extension outlet 67 (the extension outlet 67 is a highly transparent magnetic capture pipe, and a valve can be installed at the connection between the extension outlet 67 and the extension seat 61), and a permanent magnet ring assembly 68 is slidably connected to the outside of the extension outlet 67. A limiting flange 672 is fixedly connected to the outside of the extension outlet 67, and a baffle flange 671 is fixedly connected to the inner wall of the extension outlet 67. A strong magnetic field is generated by the permanent magnet ring assembly 68 (high-performance neodymium iron boron permanent magnet material). When wastewater containing magnetic flocs flows from the extension outlet 67 through the magnetic field coverage area, the magnetic attraction instantly overcomes the water flow thrust and firmly adsorbs the flocs onto the surface of the capture medium. This method has a faster separation speed than traditional natural sedimentation.

[0039] By adopting the above technical solution, wastewater is discharged into treatment chamber 62 equipped with stirring blades 66. Magnetic seed suspension and coagulant are added. Motor 64 drives stirring blades 66 to rotate at high speed to stir the liquid. Pollutants and magnetic seeds complete heteronuclear agglomeration and are transformed into magnetic flocs. The mixed fluid enters the extended outlet 67. The permanent magnet ring group 68 outside the extended outlet 67 implements three-dimensional magnetic coverage of the inner flow channel. The magnetic flocs are instantly captured and fixed on the pipe wall, and the clean liquid flows out continuously from the end. When it is necessary to discharge the magnetic flocs on the pipe wall, the permanent magnet ring group 68 is driven to move downward and make its bottom contact with the limiting flange 672. The outer permanent magnet ring group 68 is slid to the non-reactive position (magnetic field withdrawal). During this process, the magnetic flocs will be blocked by the retaining flange 671 and will not move to the non-reactive position with the permanent magnet ring group 68. Then, the residual water in treatment chamber 62 is used to completely discharge the magnetic flocs that have lost their magnetic binding.

[0040] Usage: Wastewater enters the inlet pipe 51 and first passes through the inlet end 52. When it enters the throat 53 from the inlet end 52, the liquid flow rate increases in the throat 53 (Venturi effect). At the same time, the ozone gas generator 56 generates ozone gas, which enters the throat 53 through the air inlet 55. The negative pressure in the throat 53 efficiently draws in the ozone and instantly shears and mixes it into micro-nano bubbles. The wastewater enters the tangential inlet 211 through the inlet pipe 51 and exits from the tangential inlet 211. It then flows tangentially into the treatment chamber 11 along the inner wall of the treatment chamber 11, causing the wastewater to rotate within the cylindrical treatment chamber 11. The water flow is lifted; simultaneously, the spiral guide plate 32 can also guide the rotating water flow in a spiral manner. The motor 29 drives the rotor of the conductive slip ring 28 and the main shaft 23 to rotate. The swirling blades 33 and the anode 24 rotate with the main shaft 23. The rotating needle-shaped protrusions 241 and the stationary needle-shaped protrusions 221 are arranged axially in an alternating pattern, and their relative positions with the needle-shaped protrusions 221 are constantly changing during the rotation. The liquid that rises to the upper layer of the treatment chamber 11 enters the lower layer of the treatment chamber 12 through the flow channel 13 and rises within the treatment chamber 12. During this process, the aeration components... 41. Fine bubbles are released, generating a uniformly rising bubble flow; simultaneously, after the pulse power supply 25 is energized, anode 2 44 and cathode 2 43 are activated, and each modified body 46 filled between anode 2 44 and cathode 2 43 is inductively polarized under the action of the electric field, forming a third electrode; as wastewater and bubbles pass vertically upward through the water distribution plate 42 and enter the particle packed bed composed of multiple modified bodies 46, pollutants in the wastewater are captured by the dense particle electrodes within microseconds and attacked by hydroxyl radicals; as the wastewater moves upward, the concentration of organic matter gradually decreases, and long-chain organic matter... The material is broken down into short chains and eventually mineralized. The treated liquid flows out from the flow channel 14 above the second treatment chamber 12 and enters the third treatment chamber 62. Magnetic seed suspension and coagulant are added to the third treatment chamber 62. The second motor 64 drives the stirring blade 66 to rotate at high speed to stir the liquid. The pollutants and magnetic seeds complete heteronuclear agglomeration and are transformed into magnetic flocs. The mixed fluid enters the extended outlet 67. The permanent magnet ring group 68 outside the extended outlet 67 implements three-dimensional magnetic coverage of the inner flow channel. The magnetic flocs are instantly captured and fixed on the pipe wall, and the clean liquid flows out continuously from the end.

[0041] The above description is merely a preferred embodiment of the present invention; however, 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 of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A wastewater advanced treatment equipment with wastewater recycling function, comprising a shell (1) and a liquid inlet part (5) arranged on one side of the shell (1), characterized in that: the shell (1) is internally provided with a pulse electric field reaction treatment part (2), an electrolytic oxidation part (4) and a magnetic flocculation separation part (6); the pulse electric field reaction treatment part (2) comprises a treatment cavity I (11) opened in the shell (1) and connected with the liquid inlet part (5), a hollow ring body (21) fixed on the inner wall of the treatment cavity I (11), a cathode I (22) fixed on the inner wall of the hollow ring body (21), a partition plate (26) fixed on the upper end of the hollow ring body (21) and sealingly connected with the inner wall of the treatment cavity I (11), a top plate I (27) fixed above the partition plate (26) and sealingly connected with the inner wall of the treatment cavity I (11), a conductive slip ring (28) fixed in the top plate I (27), a main shaft (23) connected with the inner bottom wall of the treatment cavity I (11) at one end and penetrating through the partition plate (26) and connected with the rotor of the conductive slip ring (28) at the other end, an anode I (24) fixed on the outer part of the main shaft (23), and a pulse power supply (25) fixed on the upper end of the top plate I (27), wherein the positive and negative electrodes of the pulse power supply (25) are connected with the conductive slip ring (28) and the cathode I (22), respectively. one end of the main shaft (23) is rotationally connected with the inner bottom wall of the treatment cavity I (11) and the other end penetrates through the partition plate (26) and is rotationally connected in the top plate I (27); a motor I (29) is fixed on the upper end of the top plate I (27) and the output shaft of the motor I (29) is connected with the rotor of the conductive slip ring (28). a plurality of needle-shaped protrusions I (221) are fixed on the outer surface of the cathode I (22), a plurality of needle-shaped protrusions II (241) are fixed on the outer surface of the anode I (24), and the needle-shaped protrusions I (221) and the needle-shaped protrusions II (241) are axially staggered.

2. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 1, characterized in that: a sealed chamber is formed between the partition plate (26) and the top plate I (27) in the treatment cavity I (11), a drainage port (15) is opened on one side of the shell (1) and connected with the sealed chamber, and a dynamic sealing part is arranged at the rotationally connected part of the main shaft (23) with the partition plate (26) and the top plate I (27).

3. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 2, characterized in that: a tangential liquid inlet port (211) is opened in the shell (1) and connected with the liquid inlet part (5) and the treatment cavity I (11).

4. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 3, characterized in that: a cyclone assembly (3) is further connected in the treatment cavity I (11), and the cyclone assembly (3) comprises a plurality of cyclone paddles (33) fixed on the outer part of the main shaft (23), a sleeve (31) fixed on the inner bottom wall of the treatment cavity I (11) and movably sleeved on the outer part of the main shaft (23), and a spiral guide plate (32) fixed on the outer part of the sleeve (31) and used for guiding the liquid discharged from the tangential liquid inlet port (211).

5. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 4, characterized in that: ​ 6. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 5, characterized in that: ​ 7. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 6, characterized in that: The liquid inlet part (5) comprises a liquid inlet pipe (51) fixed on one side of the shell (1) and communicated with the tangential liquid inlet (211), an inlet end (52) and a throat (53) arranged in the liquid inlet pipe (51), a rotational flow flange (54) integrally formed on the inner wall of the throat (53), an air inlet (55) arranged outside the liquid inlet pipe (51) and communicated with the throat (53), an ozone gas generating part (56) fixed on one side of the shell (1), and a permanent magnet part (57) fixed outside the liquid inlet pipe (51), and the output end of the ozone gas generating part (56) is connected with the air inlet (55) through a pipeline.

8. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 7, characterized in that: The electrolytic oxidation part (4) comprises a treatment cavity two (12) arranged in the shell (1), a flow channel one (13) arranged in the shell (1) and communicated with the treatment cavity one (11) and the treatment cavity two (12), an aeration assembly (41) fixed on the bottom wall of the treatment cavity two (12), a water distribution plate (42) fixed on the inner wall of the treatment cavity two (12), an anode two (44) fixed on the inner wall of the treatment cavity two (12), a cathode two (43) fixed on the upper end of the water distribution plate (42), a top plate two (45) fixed on the opening of the inner wall of the treatment cavity two (12) and sealingly connected with the inner wall of the treatment cavity two (12), and a modified body (46) located between the anode two (44) and the cathode two (43).

9. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 8, characterized in that: The magnetic flocculation separation part (6) comprises an extension seat (61) integrally formed on one side of the shell (1), a treatment cavity three (62) arranged in the extension seat (61), a flow channel two (14) arranged in the shell (1) and communicated with the treatment cavity three (62) and the treatment cavity two (12), a support plate (65) fixed on the inner wall of the treatment cavity three (62), a plurality of slots (651) arranged on the support plate (65), a top plate three (63) fixed on the opening of the treatment cavity three (62) and sealingly connected with the inner wall of the treatment cavity three (62), a stirring paddle (66) rotatably connected with the lower end of the top plate three (63) and the upper end of the support plate (65), a motor two (64) fixed on the upper end of the top plate three (63), and a dosing port (631) arranged on the upper end of the top plate three (63), and the output shaft of the motor two (64) penetrates through the top plate three (63) and is connected with the stirring paddle (66).

10. The wastewater advanced treatment apparatus with wastewater reuse function according to claim 9, characterized in that: The extension seat (61) is integrally formed with an extension outlet (67) at the lower end, a permanent magnet ring group (68) is slidably connected outside the extension outlet (67), a limiting flange (672) is fixed outside the extension outlet (67), and a material blocking flange (671) is fixed on the inner wall of the extension outlet (67).

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