Multi-dimensional tubular electrocatalytic oxidation cleaning integrated device

Abstract

The invention discloses a multi-dimensional tubular electrocatalytic oxidation and cleaning integrated device, which belongs to the technical field of sewage treatment, and comprises a raw water pool, a cleaning water tank, a water producing pool and a plurality of electrocatalytic oxidation tubes, each electrocatalytic oxidation tube is provided with a detachable upper tube cover and a detachable lower tube cover, a residue cleaning assembly for cleaning deposits on the porous graphite flake and the porous catalytic ceramic group is arranged in the electrocatalytic oxidation tube; an anode conductive electrode and a cathode conductive electrode are respectively arranged on the upper tube cover and the lower tube cover; electrode protection structures for protecting the anode conductive electrode and the cathode conductive electrode are respectively arranged on the upper tube cover and the lower tube cover; and the two electrode protection structures are rotationally matched with the upper tube cover and the lower tube cover respectively. According to the invention, the scraping and cleaning work of deposits in the electrocatalytic oxidation tube can be realized, and the sewage is treated during the subsequent catalytic oxidation of the sewage.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a multi-dimensional tubular electrocatalytic oxidation cleaning integrated device. Background Art

[0002] Electrocatalytic oxidation refers to a method of directly degrading organic matter through anode reaction or producing oxidants such as hydroxyl radicals OH, Cl2, O2 and O3 to degrade organic matter.

[0003] This technology uses an external electric field, and the reaction takes place at the electrode / solution interface. This technology is particularly suitable for treating organic matter in water that is difficult to biodegrade or difficult to be oxidized by general chemicals.

[0004] Catalytic electrolysis technology is an advanced oxidation technology based on electrolysis. It combines the strong oxidizing properties of electrolysis with the adsorption and catalytic properties of catalysts, and can effectively solve the problem of incomplete degradation of organic matter. The multiphase catalytic electrolysis method uses solid catalysts to accelerate the oxidation reaction of the liquid phase (or gas phase) under normal pressure. The catalyst exists in a solid state and is easy to separate from water, with less secondary pollution and simplified treatment process. Therefore, it has attracted more and more attention.

[0005] When electrocatalytic oxidation is used to electrolyze sewage, the sewage can be catalyzed through the porous graphite sheet and the porous catalytic ceramic group, thereby improving the effect of sewage treatment.

[0006] However, after the porous graphite sheets and the porous catalytic ceramic group have been catalytically oxidizing sewage for a long time, inorganic and organic substances will accumulate on the porous graphite sheets and the porous catalytic ceramic group, causing blockage of the holes on the porous graphite sheets and the porous catalytic ceramic group. The backwashing device in the electrocatalytic oxidation equipment can only flush away the residues attached to the surface through water flow during the cleaning of the entire equipment, while some inorganic or organic substances accumulated on the surface and in the holes are still difficult to flush away. After long-term use, it will affect the sewage treatment work. Summary of the invention

[0007] The embodiment of the present invention provides a multi-dimensional tubular electro-catalytic oxidation cleaning integrated device to solve the problems in the prior art.

[0008] The embodiment of the present invention adopts the following technical scheme: a multi-dimensional tubular electrocatalytic oxidation cleaning integrated device, comprising a raw water tank, a cleaning water tank, a water production tank and a plurality of electrocatalytic oxidation tubes, wherein the raw water tank and the plurality of electrocatalytic oxidation tubes are connected in parallel or in series through a waterway, the water production tank and the plurality of electrocatalytic oxidation tubes are connected through a waterway, the cleaning water tank and the plurality of electrocatalytic oxidation tubes are connected through a waterway, a plurality of porous graphite sheets and porous catalytic ceramic groups arranged at intervals up and down are arranged in the electrocatalytic oxidation tube, an upper tube cover and a lower tube cover are detachable on the electrocatalytic oxidation tube, a residue cleaning assembly for cleaning deposits on the porous graphite sheets and the porous catalytic ceramic group is arranged in the electrocatalytic oxidation tube, and the residue cleaning assembly is rotatably connected to the electrocatalytic oxidation tube; an anode conductive electrode and a cathode conductive electrode are respectively arranged on the upper tube cover and the lower tube cover; an electrode protection structure for protecting the anode conductive electrode and the cathode conductive electrode is respectively arranged on the upper tube cover and the lower tube cover; the two electrode protection structures are rotatably matched with the upper tube cover and the lower tube cover respectively.

[0009] A further technical solution is that the residue cleaning assembly includes a driving motor, a driving shaft, a driving plate, a blade turbine, a rotating connecting frame, two mounting columns and two connecting plates, the driving motor is provided with a motor seat, the driving motor is connected to the outer wall of the electrocatalytic oxidation tube through the motor seat, the driving shaft is rotatably connected to the electrocatalytic oxidation tube, one end of the driving shaft is transmission-connected to the main shaft of the driving motor, the middle position of the driving plate is connected to the other end of the driving shaft, the two mounting columns are respectively rotatably connected to the blade turbine and the rotating connecting frame, one end of the two connecting plates is rotatably connected to the two ends of the driving plate, and the other ends of the two connecting plates are respectively rotatably connected to the blade turbine and the rotating connecting frame; the blade turbine and the rotating connecting frame are respectively provided with scrapers.

[0010] According to a further technical solution, a first mounting sleeve and a second mounting sleeve are arranged between the upper and lower adjacent porous graphite sheets and porous catalytic ceramic groups, the blade turbine is rotatably connected to the first mounting sleeve, and the rotating connecting frame is rotatably connected to the second mounting sleeve.

[0011] According to a further technical solution, the blade turbine and the rotating connecting frame are provided with a first closed cylinder and a second closed cylinder which are closed to each other, and the second closed cylinder is provided with three supporting columns which are slidably matched with the first closed cylinder; the first closed cylinder and the second closed cylinder have the same diameter.

[0012] According to a further technical solution, the scraping member includes a first scraping brush and a second scraping brush respectively arranged on the blade turbine and the rotating connecting frame.

[0013] According to a further technical solution, the porous graphite sheet and the porous catalytic ceramic group are graphite discs and ceramic catalytic discs stacked up and down.

[0014] A further technical solution is that the electrode protection structure includes a rotating motor, a rotating gear, a rotating disk, two mounting support rods and two semicircular protective sleeves, the rotating motor is located in the upper tube cover, the rotating gear is connected to the main shaft of the rotating motor, the rotating disk is horizontally rotatably connected to the bottom of the upper tube cover, the anode conductive electrode passes through the rotating disk, the rotating disk is provided with a half gear meshing with the rotating gear, the two mounting support rods are horizontally symmetrically arranged at the bottom of the upper tube cover, the rotating disk is provided with two arc grooves, each of the semicircular protective sleeves is respectively provided with a sliding column, the sliding column slides in the arc groove, and each of the semicircular protective sleeves is provided with mounting ears at both ends, and the semicircular protective sleeves are slidably connected to the two mounting support rods through the two mounting ears.

[0015] According to a further technical solution, a matching sealing gasket is provided on the semicircular protective sleeve.

[0016] According to a further technical solution, the upper tube cover is provided with a water outlet and an upper cleaning port, and the lower tube cover is provided with a water inlet and a lower cleaning port.

[0017] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects: Firstly, the present invention flushes and impacts the blade turbine through backwash water, thereby causing the blade turbine to rotate on the mounting column. The rotation of the blade turbine drives the rotating connecting frame to rotate through the three supporting columns, thereby driving the first scraping brush and the second scraping brush to rotate and rotate, respectively scraping off the deposits on the graphite disc and the ceramic catalyst disc, preventing incomplete catalytic oxidation of sewage due to excessive deposits; ensuring that the active sites on the catalyst surface are exposed; preventing catalyst poisoning; promoting the diffusion of reactants and products; and enhancing fluid dynamics performance.

[0018] Secondly, in the process of backwashing the electrocatalytic oxidation tube of the present invention, when the anode conductive electrode and the cathode conductive electrode need to be cleaned, the rotating motor will drive the rotating gear to rotate, and the rotating gear will drive the half gear on the rotating disk to rotate, thereby driving the rotating disk to rotate on the upper tube cover. The rotation of the rotating disk will drive the two sliding columns to slide in the two arc grooves respectively, so that the two separated semicircular protective sleeves move toward each other on the two mounting support rods respectively, and the two semicircular protective sleeves can be combined by moving toward each other, thereby protecting the anode conductive electrode on the upper tube cover and protecting the cathode conductive electrode on the lower tube cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the multi-dimensional tubular electrocatalytic oxidation device of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the electrocatalytic oxidation tube in the present invention; Figure 3 is a cross-sectional view of the electrocatalytic oxidation tube of the present invention; Figure 4 The three-dimensional structure of the residue cleaning component of the present invention is shown in FIG. Figure 1 ; Figure 5 The three-dimensional structure of the residue cleaning component of the present invention is shown in FIG. Figure 2 ; Figure 6 It is a three-dimensional structural cross-sectional view of the residue cleaning component of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the blade turbine and the first scraping brush in the present invention; Figure 8 The three-dimensional structure of the electrode protection structure in the present invention is shown in FIG. Figure 1 ; Fig. 9 The three-dimensional structure of the electrode protection structure in the present invention is shown in FIG. Figure 2 .

[0020] Figure numerals: raw water tank 1, cleaning water tank 2, water production tank 3, electrocatalytic oxidation tube 4, upper tube cover 41, water outlet 411, upper cleaning port 412, lower tube cover 42, water inlet 421, lower cleaning port 422, first mounting sleeve 43, second mounting sleeve 44, residue cleaning assembly 5, drive motor 50, drive shaft 51, drive plate 52, blade turbine 53, rotating connecting frame 54, mounting column 55, connecting plate 56, motor seat 57, first closing cylinder 58, second closing cylinder 59, support column 590, first scraping brush 591, second scraping brush 592, electrode protection structure 6, rotating motor 61, rotating gear 62, rotating disk 63, mounting support rod 64, semicircular protective cover 65, mounting ear 651, half gear 66, arc groove 67, sliding column 68, graphite disc 7, ceramic catalytic disc 8, anode conductive electrode 9, anode conductive electrode 10. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] Reference Figures 1 to 9 As shown, an embodiment of the present invention provides a multi-dimensional tubular electrocatalytic oxidation cleaning integrated device, including a raw water tank 1, a cleaning water tank 2, a water production tank 3 and a plurality of electrocatalytic oxidation tubes 4, wherein the raw water tank 1 and the plurality of electrocatalytic oxidation tubes 4 are connected in parallel or in series via a waterway, the water production tank 3 and the plurality of electrocatalytic oxidation tubes 4 are connected via a waterway, the cleaning water tank 2 and the plurality of electrocatalytic oxidation tubes 4 are connected via a waterway, the electrocatalytic oxidation tubes 4 are provided with a plurality of porous graphite sheets and porous catalytic ceramic groups spaced apart from each other, and the upper and lower portions of the electrocatalytic oxidation tubes 4 are detachable. Tube cover 41 and lower tube cover 42, the electrocatalytic oxidation tube 4 is provided with a residue cleaning component 5 for cleaning deposits on the porous graphite sheet and the porous catalytic ceramic group, and the residue cleaning component 5 is rotatably connected to the electrocatalytic oxidation tube 4; the upper tube cover 41 and the lower tube cover 42 are respectively provided with an anode conductive electrode 9 and an anode conductive electrode 10; the upper tube cover 41 and the lower tube cover 42 are respectively provided with an electrode protection structure 6 for protecting the anode conductive electrode 9 and the anode conductive electrode 10; the two electrode protection structures 6 are rotatably matched with the upper tube cover 41 and the lower tube cover 42 respectively.

[0024] It should be noted that, when in use, the number of residue cleaning components 5 can be selected according to the number of porous graphite sheets and porous catalytic ceramic groups, and when cleaning the deposits on the surface of the porous graphite sheets and porous catalytic ceramic groups at the top and bottom layers of the electrocatalytic oxidation tube 4, the upper tube cover 41 and the lower tube cover 42 can be removed from the electrocatalytic oxidation tube 4 for cleaning and scraping.

[0025] The tubular structure can be connected in parallel or in series to treat sewage, which greatly saves space and can be maintained separately without affecting the operation of other groups. The power supply adopts high-frequency pulse rectified voltage 500VDC, which has extremely high sewage treatment efficiency. The output voltage adjustment range is relatively wide, and it has functions such as soft start, soft shutdown, constant current, current limiting, and overcurrent protection.

[0026] ①Soft start and soft shutdown function: Soft start and soft shutdown means that when the power supply is put into use or the given voltage changes sharply, the output will not change sharply. The soft start and soft shutdown function can make the output change smoothly.

[0027] ② Constant current function: When current feedback is used, if the given signal remains unchanged, even if the load changes with the ambient temperature, the output current can achieve the purpose of constant current at any point within the rated current range.

[0028] ③Current limiting function: Users can set the maximum working current through the electrical appliance on the control panel.

[0029] ④ Overcurrent protection function: When the peak value of the working current is greater than the rated working current, the voltage regulator controller will quickly output a passive switch signal to control the external circuit. The external circuit will cut off the output to protect the equipment.

[0030] When semiconductor materials are placed in an electric field of a certain intensity, their valence band electrons will also cross the forbidden band into the conduction band, and at the same time, electrically excited holes will be formed in the valence band. Holes have a strong ability to capture electrons, and can capture organic matter on the surface of semiconductor particles or electrons in the volume to undergo redox reactions. Applying voltage can form a voltage gradient inside the catalytic material, causing holes and electrons to move in opposite directions until they recombine, thereby improving catalytic efficiency.

[0031] In the electrocatalytic reaction, O2 produced by electrolysis and exogenous O2 are reduced at the cathode to produce H2O2.

[0032] The ·OH produced in the process directly reacts with organic matter in the wastewater without selection, degrading it into carbon dioxide, water and simple organic matter, with little or no secondary pollution. High energy efficiency, generally can be carried out at normal temperature and pressure; It can be processed alone or as a pre-processing.

[0033] In this embodiment, the residue cleaning assembly 5 includes a driving motor 50, a driving shaft 51, a driving plate 52, a blade turbine 53, a rotating connecting frame 54, two mounting columns 55 and two connecting plates 56. The driving motor 50 is provided with a motor seat 57, and the driving motor 50 is connected to the outer wall of the electrocatalytic oxidation tube 4 through the motor seat 57. The driving shaft 51 is rotatably connected to the electrocatalytic oxidation tube 4, one end of the driving shaft 51 is connected to the main shaft of the driving motor 50, the middle position of the driving plate 52 is connected to the other end of the driving shaft 51, the two mounting columns 55 are respectively rotatably connected to the blade turbine 53 and the rotating connecting frame 54, one end of the two connecting plates 56 is rotatably connected to the two ends of the driving plate 52, and the other ends of the two connecting plates 56 are respectively rotatably connected to the blade turbine 53 and the rotating connecting frame 54; the blade turbine 53 and the rotating connecting frame 54 are respectively provided with scrapers.

[0034] A first mounting sleeve 43 and a second mounting sleeve 44 are arranged between the upper and lower adjacent porous graphite sheets and porous catalytic ceramic groups. The blade turbine 53 is rotatably connected to the first mounting sleeve 43 by a rotating connecting frame 54 , and the rotating connecting frame 54 is rotatably connected to the second mounting sleeve 44 .

[0035] After the sewage is catalytically oxidized, when the deposits accumulated on the graphite disc 7 and the ceramic catalytic disc 8 are scraped off, the driving motor 50 drives the driving shaft 51 to rotate, which will drive the driving plate 52 to rotate and the two connecting plates 56 to rotate. The rotation of the two connecting plates 56 will respectively drive the two mounting columns 55 to move up and down, thereby driving the blade turbine 53 and the rotating connecting frame 54 to slide up and down on the first mounting sleeve 43 and the second mounting sleeve 44 respectively, and the positions of the first scraping brush 591 and the second scraping brush 592 on the blade turbine 53 and the rotating connecting frame 54 are moved to the graphite disc 7 and the ceramic catalytic disc 8 respectively; The backwash water flushes and impacts the blade turbine 53, so that the blade turbine 53 rotates on the mounting column 55. The rotation of the blade turbine 53 drives the rotating connecting frame 54 to rotate through the three supporting columns 590, thereby driving the first scraping brush 591 and the second scraping brush 592 to rotate and rotate, respectively scraping off the deposits on the graphite disc 7 and the ceramic catalytic disc 8, preventing incomplete catalytic oxidation of sewage due to excessive deposits; ensuring that the active sites on the catalyst surface are exposed; preventing catalyst poisoning; promoting the diffusion of reactants and products; and enhancing fluid dynamics.

[0036] When scraping away the deposits, there are the following benefits: By scraping off the deposits, the active sites on the catalyst surface can be exposed again, restoring the catalyst's high catalytic performance; By scraping off the deposits, catalyst poisoning can be avoided and the service life of the catalyst can be extended.

[0037] By scraping off the deposits, the diffusion resistance can be reduced, the mass transfer efficiency can be improved, and the reactants can come into contact with the catalyst and react more quickly. At the same time, the reaction products can leave the catalyst surface more quickly, avoiding the inhibition of the reaction by product accumulation.

[0038] During the catalytic oxidation of sewage, the driving motor 50 operates to bring the blade turbine 53 and the rotating connecting frame 54 closer to each other, and brings the first sealing cylinder 58 and the second sealing cylinder 59 closer to each other, so as to facilitate the catalytic oxidation of sewage.

[0039] It should be noted that the flow rate of the cleaning water transported into the electrocatalytic oxidation tube 4 can drive the plurality of blade turbines 53 to rotate, thereby scraping off the deposits accumulated on the graphite disc 7 and the ceramic catalyst disc 8 .

[0040] Scraping off the deposits can make the surface of the graphite disc 7 and the ceramic catalyst disc 8 smoother, reduce the turbulence of the water flow, and enhance the fluid dynamics. This helps to improve the flow uniformity of sewage around the catalyst disc, ensure that the catalyst in each part can fully play its role, and improve the overall treatment efficiency.

[0041] In this embodiment, the blade turbine 53 and the rotating connecting frame 54 are provided with a first closed cylinder 58 and a second closed cylinder 59 which are closed to each other. The second closed cylinder 59 is provided with three support columns 590 which are slidably fitted with the first closed cylinder 58. The diameters of the first closed cylinder 58 and the second closed cylinder 59 are the same.

[0042] During the catalytic oxidation of sewage, the first sealing cylinder 58 and the second sealing cylinder 59 will conflict with each other, sealing the drive plate 52, the two connecting plates 56 and the two mounting columns 55 to prevent impurities in the sewage from remaining on the equipment, causing the presence of impurities on the equipment to affect the operation of subsequent devices. During the backwashing process, the lower sealing cylinder and the second sealing cylinder 59 are separated from each other. During the separation process, the three support columns 590 will also play a guiding role. The backwashing water will also clean the equipment again to ensure the normal operation of subsequent equipment.

[0043] When the backwash water rushes to the turbine, it will drive the turbine to rotate, thereby driving the rotating connecting frame 54 to rotate through the three support columns 590. During the cleaning process, the first scraping brush 591 and the second scraping brush 592 can be driven respectively to scrape and clean the deposits on the graphite disc 7 and the ceramic catalyst disc 8.

[0044] When the blade turbine 53 and the rotating connecting frame 54 move to both sides respectively, the three supporting columns 590 can drive the blade turbine 53 and the rotating connecting frame 54 to keep rotating synchronously.

[0045] In this embodiment, the scraping member includes a first scraping brush 591 and a second scraping brush 592 which are respectively arranged on the blade turbine 53 and the rotating connecting frame 54 .

[0046] During the rotation of the blade turbine 53 and the rotating connecting frame 54, the first scraping brush 591 and the second scraping brush 592 will be driven to scrape off the deposits produced by catalytic oxidation on the graphite disc 7 and the ceramic catalyst disc 8 respectively, and the first scraping brush 591 and the second scraping brush 592 can also scrape and clean the deposits in the holes of the graphite disc 7 and the ceramic catalyst disc 8.

[0047] In this embodiment, the porous graphite sheet and the porous catalytic ceramic group are graphite discs 7 and ceramic catalytic discs 8 stacked up and down. The ceramic catalytic disc 8 is 15 mm thick and adopts a honeycomb structure to allow sewage to pass through the catalytic layer completely, thereby increasing the catalytic effect. The graphite disc 7 can improve the electron conduction path, enhance the electrode stability, increase the specific surface area of ​​the catalyst, and promote the dispersion of the catalyst and the exposure of the active sites.

[0048] In this embodiment, the electrode protection structure 6 includes a rotating motor 61, a rotating gear 62, a rotating disk 63, two mounting support rods 64 and two semicircular protective sleeves 65. The rotating motor 61 is located in the upper tube cover 41. The rotating gear 62 is connected to the main shaft of the rotating motor 61. The rotating disk 63 is horizontally rotatably connected to the bottom of the upper tube cover 41. The anode conductive electrode 9 passes through the rotating disk 63. The rotating disk 63 is provided with a half gear 66 meshing with the rotating gear 62. The two mounting support rods 64 are horizontally symmetrically arranged at the bottom of the upper tube cover 41. The rotating disk 63 is provided with two arc grooves 67. Each of the semicircular protective sleeves 65 is respectively provided with a sliding column 68. The sliding column 68 slides in the arc groove 67. Both ends of each semicircular protective sleeve 65 are provided with mounting ears 651. The semicircular protective sleeve 65 is slidably connected to the two mounting support rods 64 through the two mounting ears 651.

[0049] During the backwashing process of the electrocatalytic oxidation tube 4, when the anode conductive electrode 9 and the anode conductive electrode 10 need to be cleaned, the rotating motor 61 will drive the rotating gear 62 to rotate, and the rotating gear 62 will drive the half gear 66 on the rotating disk 63 to rotate, thereby driving the rotating disk 63 to rotate on the upper tube cover 41. The rotation of the rotating disk 63 will drive the two sliding posts 68 to slide in the two arc grooves 67 respectively, so that the two separated semicircular protective sleeves 65 move toward each other on the two mounting support rods 64 respectively. The two semicircular protective sleeves 65 move toward each other to combine, thereby protecting the anode conductive electrode 9 on the upper tube cover 41 and protecting the anode conductive electrode 10 on the lower tube cover 42. Protecting the electrode has the following benefits: Reduce mechanical damage: During the backwash process, the impact of water flow may cause mechanical damage to the electrode, such as scratching, abrasion, etc. By using two semicircular protective sleeves 65 to protect it, the direct impact of water flow on the electrode can be reduced, the degree of wear on the electrode surface can be reduced, and the service life of the electrode can be extended.

[0050] Prevent chemical corrosion. Backwash water may contain some chemicals, such as acids, alkalis, oxidants, etc., which can corrode the electrodes. Protecting the electrodes can reduce the contact between the electrodes and the chemicals in the backwash water and reduce the risk of corrosion.

[0051] To maintain the activity of the electrode, during long-term use, some dirt or sediment may accumulate on the surface of the electrode, affecting the activity of the electrode. Backwashing is an important means to remove these dirt and sediments, but if the electrode is not protected during the backwashing process, it may cause the destruction of the active sites of the electrode, thus affecting the electrocatalytic oxidation effect.

[0052] Maintain the integrity of the electrode structure. The structural integrity of the electrode also has an important impact on the electrocatalytic oxidation effect. If the electrode structure is damaged during the backwash process, it may lead to problems such as increased electrode resistance and uneven current distribution, thereby affecting the efficiency and stability of electrocatalytic oxidation.

[0053] In this embodiment, a matching sealing gasket is provided on the semicircular protective cover 65. During the backwashing process, when the two semicircular protective covers 65 are combined to protect the electrodes, it can prevent the cleaning water from penetrating into the electrodes, and the cleaning water may contain corrosive agents that damage the electrodes.

[0054] In this embodiment, the upper pipe cover 41 is provided with a water outlet 411 and an upper cleaning port 412, and the lower pipe cover 42 is provided with a water inlet 421 and a lower cleaning port 422; In the process of treating the sewage, the sewage in the raw water pool 1 is transported to the electrocatalytic oxidation tube 4 through the water inlet 421. After the sewage is treated, the treated water is discharged to the generating pool 3 through the water outlet 411. When the electrocatalytic oxidation tube 4 is backwashed, clean water in the cleaning water tank 2 is transported into the electrocatalytic oxidation tube 4 through the upper cleaning port 412 , and after cleaning is completed, the cleaned water is discharged outwardly into the generating pool 3 through the lower cleaning port 422 .

[0055] Electrocatalytic oxidation technology is currently widely used to degrade organic matter contained in water: hydrocarbons, aldehydes, alcohols, phenols, and amines.

[0056] 1. When electrocatalytic oxidation technology is used to treat hydrocarbon organic matter in water, the oil removal rate will generally reach 93~95%. For wastewater with an oil content of less than 150mg / L, after treatment, adding a coagulant and filtering, it can be reduced to less than 0.7mg / L; it has a good treatment effect on hydrocarbon organic matter with high water solubility.

[0057] 2. When electrocatalytic oxidation is used to treat aldehyde organic matter in water, NaOH, Na2SO4 or NaCl is used as electrolyte. Under the condition of current density of 0.19-0.22A / cm2 for 3h, formaldehyde is decomposed and the current efficiency can reach 95.5%. Most of the COD was removed.

[0058] 3. When treating alcohol organic matter in water by electrocatalytic oxidation, add 1 mol / L NaOH as electrolyte. When the current density is 0.19-0.22 A / cm2 and electrolysis is performed for 3 hours, all methanol in the wastewater can be decomposed.

[0059] The COD of wastewater containing ethylene glycol can be reduced from 28000mg / L to 500mg / L by electrolytic oxidation.

[0060] 4. When electrocatalytic oxidation is used to treat phenolic organic matter in water, phenolic and other organic matter can be removed under the action of electrolyte. For example, the COD value of phenolic wastewater with a COD value of 29000 mg / L can be reduced to 671 mg / L when the temperature is 25~40℃, the voltage is 1050~1800V, and the current is 5A.

[0061] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A multi-dimensional tubular electrocatalytic oxidation cleaning integrated device, comprising a raw water pool (1), a cleaning water tank (2), a water production pool (3) and a plurality of electrocatalytic oxidation tubes (4); The raw water pool (1) and the plurality of electrocatalytic oxidation tubes (4) are connected in parallel or in series via a water channel, and the water production pool (3) and the plurality of electrocatalytic oxidation tubes (4) are connected via a water channel; The cleaning water tank (2) is connected to the plurality of electrocatalytic oxidation tubes (4) via a water channel; It is characterized in that The electrocatalytic oxidation tube (4) is provided with a plurality of porous graphite sheets and porous catalytic ceramic groups spaced apart from each other, and the electrocatalytic oxidation tube (4) is provided with a detachable upper tube cover (41) and a detachable lower tube cover (42); The electrocatalytic oxidation tube (4) is provided with a residue cleaning component (5) for cleaning deposits on the porous graphite sheet and the porous catalytic ceramic group, and the residue cleaning component (5) is rotatably connected to the electrocatalytic oxidation tube (4); The upper tube cover (41) and the lower tube cover (42) are provided with an anode conductive electrode (9) and an anode conductive electrode (10) respectively; The upper tube cover (41) and the lower tube cover (42) are respectively provided with electrode protection structures (6) for protecting the anode conductive electrode (9) and the anode conductive electrode (10); The two electrode protection structures (6) are rotatably matched with the upper tube cover (41) and the lower tube cover (42) respectively; The residue cleaning assembly (5) comprises a driving motor (50), a driving shaft (51), a driving plate (52), a blade turbine (53), a rotating connecting frame (54), two mounting columns (55) and two connecting plates (56); The drive motor (50) is provided with a motor seat (57), and the drive motor (50) is connected to the outer wall of the electrocatalytic oxidation tube (4) via the motor seat (57); The drive shaft (51) is rotatably connected to the electrocatalytic oxidation tube (4), one end of the drive shaft (51) is drivingly connected to the main shaft of the drive motor (50), and the middle position of the drive plate (52) is connected to the other end of the drive shaft (51); The two mounting columns (55) are rotatably connected to the blade turbine (53) and the rotating connecting frame (54) respectively; One end of the two connecting plates (56) is rotatably connected to two ends of the driving plate (52), and the other ends of the two connecting plates (56) are rotatably connected to the blade turbine (53) and the rotating connecting frame (54) respectively; The blade turbine (53) and the rotating connecting frame (54) are respectively provided with scraping pieces.

2. The multi-dimensional tubular electrocatalytic oxidation cleaning integrated device according to claim 1, characterized in that: A first mounting sleeve (43) and a second mounting sleeve (44) are disposed between the upper and lower adjacent porous graphite sheets and the porous catalytic ceramic group; The blade turbine (53) is rotatably connected to the first mounting sleeve (43), and the rotating connecting frame (54) is rotatably connected to the second mounting sleeve (44).

3. The multi-dimensional tubular electrocatalytic oxidation cleaning integrated device according to claim 2, characterized in that: The blade turbine (53) and the rotating connecting frame (54) are provided with a first sealing cylinder (58) and a second sealing cylinder (59) which are sealed with each other; The second closed cylinder (59) is provided with three support columns (590), and the support columns (590) are slidably matched with the first closed cylinder (58).

4. The multi-dimensional tubular electrocatalytic oxidation cleaning integrated device according to claim 3, characterized in that: The first closing cylinder (58) and the second closing cylinder (59) have the same diameter.

5. The multi-dimensional tubular electrocatalytic oxidation cleaning integrated device according to claim 2, characterized in that: The scraping member comprises a first scraping brush (591) and a second scraping brush (592) which are respectively arranged on the blade turbine (53) and the rotating connecting frame (54).

6. The multi-dimensional tubular electrocatalytic oxidation cleaning integrated device according to claim 1, characterized in that: The electrode protection structure (6) comprises a rotating motor (61), a rotating gear (62), a rotating disk (63), two mounting support rods (64) and two semicircular protective sleeves (65); The rotating motor (61) is located inside the upper tube cover (41), and the rotating gear (62) is connected to the main shaft of the rotating motor (61); the rotating disk (63) is horizontally rotatably connected to the bottom of the upper tube cover (41); The anode conductive electrode (9) passes through the rotating disk (63); The rotating disk (63) is provided with a half gear (66) meshing with the rotating gear (62), and the two mounting support rods (64) are horizontally symmetrically arranged at the bottom of the upper tube cover (41); The rotating disk (63) is provided with two arc-shaped grooves (67), and each of the semicircular protective sleeves (65) is provided with a sliding column (68), and the sliding column (68) slides in the arc-shaped groove (67); Both ends of each semicircular protective sleeve (65) are provided with mounting ears (651), and the semicircular protective sleeve (65) is slidably connected to the two mounting support rods (64) via the two mounting ears (651).

7. The multi-dimensional tubular electrocatalytic oxidation cleaning integrated device according to claim 6, characterized in that: A matching sealing gasket is provided on the semicircular protective sleeve (65).

8. The multi-dimensional tubular electrocatalytic oxidation cleaning integrated device according to claim 1, characterized in that: The porous graphite sheet and the porous catalytic ceramic group are a graphite disc (7) and a ceramic catalytic disc (8) stacked up and down.

9. The multi-dimensional tubular electrocatalytic oxidation cleaning integrated device according to claim 1, characterized in that: The upper tube cover (41) is provided with a water outlet (411) and an upper cleaning port (412), and the lower tube cover (42) is provided with a water inlet (421) and a lower cleaning port (422).

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