An electrocoagulation treatment device for wastewater containing heavy metals

Abstract

The present invention provides an electric flocculation treatment device for heavy metal-containing wastewater, and relates to the field of industrial wastewater treatment. The electric flocculation treatment device for heavy metal-containing wastewater comprises a heavy metal wastewater treatment tank, a wastewater inlet is installed on the side of the heavy metal wastewater treatment tank, a wastewater outlet is installed on the bottom wall of the heavy metal wastewater treatment tank, an aeration box A is fixedly installed at the bottom of the heavy metal wastewater treatment tank, the upper end of the aeration box A is located in the heavy metal wastewater treatment tank, a plurality of jet holes A are provided on the upper surface of the aeration box A, the jet holes A connect the heavy metal wastewater treatment tank and the aeration box A, and a plurality of aeration boxes B are fixedly installed on the side walls of the heavy metal wastewater treatment tank. The electric flocculation treatment device for heavy metal-containing wastewater can clean the surface of the plate, treat the passivation film on the surface of the passivated anode plate and the attachments on the surface of the cathode by arranging an adjustable deformable electrolytic component, an aeration box B and a grinding plate substrate, and thus recycle them.

Description

Technical Field

[0001] The invention relates to the field of industrial wastewater treatment, in particular to an electric flocculation treatment device for heavy metal-containing wastewater. Background Art

[0002] The impact of heavy metal pollutants on human health and the natural environment is becoming increasingly serious. They are highly stable, difficult to degrade, and have a wide range of migration in the environment, and are gradually becoming a global problem. Heavy metal pollutants are harmful to the health of animals and humans, and can cause disorders in the kidneys, reproductive system, liver, brain, and central nervous system. Therefore, the prevention and control of heavy metal wastewater pollution has attracted great attention from relevant industry experts at home and abroad, and is currently a hot spot and difficulty in water pollution prevention and control research. At present, the commonly used methods for treating heavy metal wastewater are physical and chemical methods, especially chemical methods, which are more widely used. However, the chemical method has many shortcomings such as high operating costs, high secondary pollution risks, and unsatisfactory treatment effects, which are difficult to meet the needs of development. Electrocoagulation is to use the cations generated by the soluble anode under the action of an external electric field to hydrolyze and polymerize into a series of multi-nuclear hydroxyl complexes and hydroxides in the solution. These complexes and hydroxides have good coagulation and adsorption effects, thereby removing pollutants. Electrocoagulation has been widely used in water treatment because it combines coagulation, flotation, redox, and sterilization, and has the advantages of compact equipment, load impact resistance, flexible control, removal of many types of pollutants, and good treatment effect. However, although electrocoagulation technology has many advantages, it also has problems such as easy passivation of the electrode plate. In the process of treating heavy metal ions, the reversibility of the flocculation products will inhibit the removal of heavy metals.

[0003] Chinese patent: CN109607708A discloses an electro-flocculation treatment method and an electro-flocculation device for heavy metal-containing wastewater, which uses a combination of mesoporous materials and electro-flocculation technology to effectively improve the electrolysis efficiency of heavy metal wastewater treatment, and has a simple structure, convenient disassembly and cleaning, and excellent heavy metal wastewater treatment effect. In the electro-flocculation device of the present invention, when the micro-electrolysis filler is consumed, it can be restored to use by simply adding new filler without replacing the electrode plate.

[0004] Although this solution is easy to disassemble and clean, after the wastewater is electrolytically coagulated and then aerated and floated, it is easy to stick to the plates, so that the efficiency of the plates will slowly decrease with the reaction time, and finally the plates need to be cleaned separately.

[0005] Chinese Patent: CN207581433U discloses an electro-flocculation wastewater treatment system, an electro-flocculation device and a reflux pipeline. The electro-flocculation device includes a conductive box and an electrolytic component. The conductive box has a wastewater treatment chamber. The conductive box is provided with a water inlet and a water outlet respectively connected to the wastewater treatment chamber, and the electrolytic component is installed in the wastewater treatment chamber. The reflux pipeline is connected between the water outlet and the water inlet. By applying the technical solution of the utility model, the inner wall of the wastewater treatment chamber can participate in the electrolysis, reducing the volume required for the additional cathode in the wastewater treatment chamber and making full use of the volume of the conductive box. Through the reflux pipeline, the wastewater flowing out of the outlet can be passed into the conductive box through the water inlet for secondary electrolysis treatment or circulating electrolysis treatment, thereby improving the treatment rate of heavy metal pollutants in the wastewater and reducing the content of heavy metal pollutants in the wastewater as much as possible.

[0006] In order to improve the electrolysis efficiency, the entire conductive box is involved in the electrolysis, and the wastewater is circulated for electrolysis. Although the anode is involved in the reaction, anode passivation is the main factor limiting the application of electrocoagulation technology. The presence of the passivation film will slow down the anode dissolution rate, reduce the current efficiency and increase the operating power consumption. However, the cathode will be contaminated by floccules while generating bubbles, and the entire conductive box will be used as the cathode, resulting in uncontrollable conductive distance between the cathode and the anode. Summary of the invention

[0007] In view of the deficiencies of the prior art, the present invention provides an electrocoagulation treatment device for heavy metal-containing wastewater, which solves the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electric flocculation treatment device for heavy metal-containing wastewater, comprising a heavy metal wastewater treatment tank, a wastewater inlet is installed on the side of the heavy metal wastewater treatment tank, a wastewater outlet is installed on the bottom wall of the heavy metal wastewater treatment tank, an aeration box A is fixedly installed at the bottom of the heavy metal wastewater treatment tank, the upper end of the aeration box A is located in the heavy metal wastewater treatment tank, a plurality of jet holes A are provided on the upper surface of the aeration box A, the jet holes A are connected to the heavy metal wastewater treatment tank and the aeration box A, and the heavy metal wastewater treatment tank is provided with a plurality of jet holes A. Multiple aeration boxes B are fixedly installed on the side walls of the pool, and there are the same distances between the multiple aeration boxes B. Several jet holes B are provided on the front and rear side walls of the aeration box B. Airtight gas separation boxes are fixedly installed on the side walls and bottom walls of the heavy metal wastewater treatment pool. Multiple aeration boxes B are connected to the side airtight gas separation boxes, and the aeration box A is connected to the bottom airtight gas separation box. The airtight gas separation boxes on the side of the heavy metal wastewater treatment pool and the airtight gas separation boxes on the bottom wall of the heavy metal wastewater treatment pool are connected by connecting pipes, and an air inlet pipe is installed on the side airtight gas separation box;

[0009] Two covers are installed on the upper end of the heavy metal wastewater treatment tank. The covers can be opened automatically. When the two covers are closed, they seal the upper end of the heavy metal wastewater treatment tank together. Several grinding plate base plates are fixedly installed on the inner wall of the cover plate. There is a same distance between the grinding plate base plates.

[0010] Two sets of adjustable deformable electrolytic components are installed in the heavy metal wastewater treatment tank. The two sets of adjustable deformable electrolytic components are staggered. The adjustable deformable electrolytic components can rotate in the heavy metal wastewater treatment tank and pass between the aeration box B and the grinding plate base plate.

[0011] Preferably, the adjustable deformable electrolytic element comprises a guide rail A, two guide rails A are provided, and poles are installed at both ends of the guide rails A;

[0012] It includes two metal conduction wheels, which are located at both ends of two guide rails A, and the ends of two poles at one end away from the guide rail A are fixed to the metal conduction wheel, and the other end of the metal conduction wheel penetrates the heavy metal wastewater treatment tank and is rotatably connected thereto;

[0013] It includes two worm gear type driving machines, both of which are fixed outside the heavy metal wastewater treatment tank, and the output ends of which are connected to the main shaft of the metal conduction wheel;

[0014] It includes two guide rails B, which are located at the sides of the two guide rails A that are away from each other;

[0015] It includes two sets of scissor-type lifting rods, which are located between the guide rail A and the guide rail B, one end of which is hinged to the guide rail A and the guide rail B respectively, and the other end is slidably connected to the guide rail A and the guide rail B;

[0016] It includes two motors, both are fixed between two guide rails A, the output shafts of the motors are fixedly mounted with screws, the other ends of the screws are rotatably connected to the guide rails A, the outsides of the screws are mounted with screw sleeves, the two are threadedly matched, and the screw sleeves are connected to the sliding ends of the corresponding scissor-type lifting rods;

[0017] It includes pole plates, which are arranged in two groups, each group having a plurality of pole plates, and the two groups of pole plates are respectively fixed to ends of two guide rails B that are away from each other.

[0018] Preferably, the electrode plates are arranged at equal distances on the guide rail B, the electrode plates included in the two adjustable deformable electrolytic components are staggered with each other, and the staggered spacing of the electrode plates included in the two adjustable deformable electrolytic components are the same, when the electrode plates of the two adjustable deformable electrolytic components overlap, the electrode plates of the overlapping parts are all in a longitudinal downward state and are below the wastewater liquid level, the electrode plates on the other guide rail B are all longitudinally upward, above the wastewater liquid level, and between the grinding plate base plate, and at this time the guide rail A rotates forty-five degrees.

[0019] Preferably, the distances between the aeration boxes B and the pole plates are the same, and the pole plates can be inserted between two adjacent aeration boxes B during transfer. Any pole plate passes between two adjacent aeration boxes B, and the two sides of the pole plate correspond to the jet holes B on the two aeration boxes B respectively.

[0020] Preferably, the grinding plate substrate is an arc-shaped structure, the center of the grinding plate substrate corresponds to the center of the metal conduction wheel, the distances between the pole plates and the corresponding grinding plate substrates are the same, and any pole plate can pass between two adjacent grinding plate substrates when transferred.

[0021] Preferably, when the guide rail B drives the electrode plate to pass between the aeration box B and the grinding plate base plate, the guide rail B can use the motor, screw and screw sleeve to drive the scissor-type lifting rod to gradually reduce the distance between the guide rail A and the electrode plate.

[0022] Preferably, the cover plates are all arc-shaped structures, and the two cover plates are symmetrically arranged. Rocker arms are fixedly installed on the hinge shafts of the cover plates and the heavy metal wastewater treatment tank. Two hydraulic cylinders are hinged on the back of the heavy metal wastewater treatment tank, and the output shafts of the hydraulic cylinders are hinged to the end of the rocker arm away from the rotating shaft.

[0023] Preferably, auxiliary plates are fixedly mounted on the front and rear side walls of the heavy metal wastewater treatment tank, the metal conduction wheel and the worm gear drive are mounted on the auxiliary plates, and the shape of the auxiliary plates matches the two cover plates.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The electric flocculation treatment device for heavy metal-containing wastewater is provided with adjustable deformable electrolytic components, an aeration box B and a grinding plate substrate. When the grinding plate substrates of two groups of adjustable deformable electrolytic components face downward and overlap alternately, they play the role of anode plates and cathode plates to each other. The overlapping plates have the same and close gap, and can play a better electrolytic role. When the anode is sacrificed, the bubbles released by the cathode can also slow down the passivation degree of the anode, and can also be used for wastewater with low conductivity. After the plates in the wastewater are used for a period of time, the worm gear drive machine drives them to rotate, and at this time another group of plates begins to be replaced and slowly transferred into the wastewater. The used plates will approach the rotation point during the movement and first transfer to the aeration box B. At this time, the bubbles in the aeration box B will clean the plates, and then the plates will continue to transfer to the grinding plate substrate. The two adjacent grinding plate substrates can be clamped to clean the surface of the plates, and the passivation film on the surface of the passivated anode plates and the attachments on the surface of the cathode are processed, so that they are recycled and used repeatedly without affecting the electrolysis efficiency.

[0026] The electrocoagulation treatment device for heavy metal-containing wastewater is provided with a cover plate and a hydraulic cylinder. Under the drive of the hydraulic cylinder, the cover plate can be opened or closed. After the cover plate is opened, the electrode plates on the upper side can be exposed. At this time, the electrode plates are electrode plates after reaction and can be tested or replaced. During the testing and replacement process, the other set of electrode plates still play an electrolytic role, so the electrocoagulation process is not affected. After the cover plate is opened, sandpaper or other grinding tools with grinding function can be added between the grinding plate substrate. After the cover plate is opened, the heavy metal wastewater treatment pool can be conveniently cleaned.

[0027] The electric flocculation treatment device for heavy metal-containing wastewater is provided with an aeration box A and an aeration box B. When the aeration box A and the aeration box B are used for aeration, the flocs can be floated during electrolytic flocculation. Subsequently, the floated flocs always flow in the wastewater and gradually transfer to the surface of the wastewater. During aeration, the two sets of pole plates participating in electrolysis are not easily attached to the flocs due to the effect of the water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the back side of the structure of the present invention;

[0030] Figure 3 It is a schematic diagram of another state of the structure of the present invention;

[0031] Figure 4 This is a diagram showing the internal structure of a heavy metal wastewater treatment pool according to the present invention;

[0032] Figure 5 It is a connection diagram of the adjustable deformable electrolytic element of the present invention and the heavy metal wastewater treatment tank;

[0033] Figure 6 This is a diagram showing the internal structure of a heavy metal wastewater treatment pool according to the present invention;

[0034] Figure 7 This is a schematic diagram of the bottom structure of the heavy metal wastewater treatment pool of the present invention;

[0035] Figure 8 The structure of the adjustable deformable electrolytic element of the present invention is shown in FIG. Figure 1 ;

[0036] Fig. 9 The structure of the adjustable deformable electrolytic element of the present invention is shown in FIG. Figure 2 ;

[0037] Fig.10 For the present invention Fig. 9 A magnified view of the local area structure.

[0038] In the figure: 1. heavy metal wastewater treatment tank; 2. aeration box A; 3. air hole A; 4. aeration box B; 5. air hole B; 6. air-tight gas distribution box; 7. connecting pipe; 8. air inlet pipe; 9. cover plate; 10. grinding plate substrate; 11. adjustable deformable electrolytic component; 1101. guide rail A; 1102. pole; 1103. metal conduction wheel; 1104. worm gear drive; 1105. guide rail B; 1106. scissor-type lifting rod; 1107. motor; 1108. screw; 1109. screw sleeve; 1110. pole plate; 12. rocker arm; 13. hydraulic cylinder; 14. auxiliary plate. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] like Figure 1-10As shown, an electric flocculation treatment device for heavy metal-containing wastewater includes a heavy metal wastewater treatment tank 1, a wastewater inlet is installed on the side of the heavy metal wastewater treatment tank 1, a wastewater outlet is installed on the bottom wall of the heavy metal wastewater treatment tank 1, an aeration box A2 is fixedly installed at the bottom of the heavy metal wastewater treatment tank 1, the upper end of the aeration box A2 is located in the heavy metal wastewater treatment tank 1, a plurality of jet holes A3 are arranged on the upper surface of the aeration box A2, the jet holes A3 are connected to the heavy metal wastewater treatment tank 1 and the aeration box A2, and a plurality of jet holes A3 are fixedly installed on the side walls of the heavy metal wastewater treatment tank 1. Aeration box B4, multiple aeration boxes B4 have the same distance between them, and the front and rear side walls of the aeration box B4 are provided with a plurality of jet holes B5. The side walls and the bottom wall of the heavy metal wastewater treatment tank 1 are fixedly installed with airtight gas separation boxes 6. Multiple aeration boxes B4 are connected with the side airtight gas separation boxes 6. The aeration box A2 is connected with the bottom airtight gas separation box 6. The airtight gas separation box 6 on the side of the heavy metal wastewater treatment tank 1 and the airtight gas separation box 6 on the bottom wall of the heavy metal wastewater treatment tank 1 are connected by a connecting pipe 7. The airtight gas separation box 6 on the side is installed with an air inlet pipe 8;

[0044] Two cover plates 9 are installed at the upper end of the heavy metal wastewater treatment tank 1. The cover plates 9 can be opened automatically. When the two cover plates 9 are closed, they seal the upper end of the heavy metal wastewater treatment tank 1. A plurality of grinding plate base plates 10 are fixedly installed on the inner wall of the cover plates 9. There is a same distance between the grinding plate base plates 10.

[0045] Two groups of adjustable deformable electrolytic components 11 are installed in the heavy metal wastewater treatment tank 1. The two groups of adjustable deformable electrolytic components 11 are staggered. The adjustable deformable electrolytic components 11 can rotate in the heavy metal wastewater treatment tank 1 and pass between the aeration box B4 and the grinding plate substrate 10.

[0046] The wastewater inlet of the heavy metal wastewater treatment pool 1 is connected to the upstream equipment for wastewater treatment, while the outlet is connected to the downstream process for water treatment. The air inlet pipe 8 is connected to the aeration device, which can use external air or supply oxygen. The jet hole A3 and the jet hole B5 correspond to different directions respectively. The jet hole A3 can achieve the effect of flotation and flocculation, while the side jet hole B5 can achieve the effect of gathering flocculation. The distance between the paddle plates is relatively close, and the inner walls of the two adjacent grinding plate substrates 10 are filled with sandpaper or other flat abrasives.

[0047] The adjustable deformable electrolytic component 11 includes two guide rails A1101, and poles 1102 are installed at both ends of the guide rails A1101;

[0048] It includes two metal conduction wheels 1103, which are located at both ends of the two guide rails A1101. The ends of the two poles 1102 at one end away from the guide rail A1101 are fixed to the metal conduction wheel 1103, and the other end of the metal conduction wheel 1103 passes through the heavy metal wastewater treatment tank 1 and is rotatably connected thereto;

[0049] It includes two worm gear type driving machines 1104, both of which are fixed outside the heavy metal wastewater treatment tank 1, and the output ends thereof are connected to the main shaft of the metal conduction wheel 1103;

[0050] It includes two guide rails B1105, which are located at the sides of the two guide rails A1101 that are away from each other;

[0051] It includes a scissor-type lifting rod 1106, which is provided with two groups and is located between the guide rail A1101 and the guide rail B1105, one end of which is respectively hinged to the guide rail A1101 and the guide rail B1105, and the other end is slidably connected to the guide rail A1101 and the guide rail B1105;

[0052] It includes two motors 1107, both are fixed between the two guide rails A1101, the output shafts of the motors 1107 are fixedly mounted with screws 1108, the other ends of the screws 1108 are rotatably connected to the guide rails A1101, the outsides of the screws 1108 are mounted with screw sleeves 1109, the two are threadedly matched, and the screw sleeves 1109 are connected to the sliding ends of the corresponding scissor-type lifting rods 1106;

[0053] It includes pole plates 1110. The pole plates 1110 are provided in two groups, each group is provided with a plurality of pole plates. The two groups of pole plates 1110 are respectively fixed to ends of the two guide rails B1105 that are away from each other.

[0054] The axis of the two metal conduction wheels 1103 is a hollow tube with cables connected inside. The cables are connected to the two guide rails A1101 through the pole 1102, and then conduct electricity to the guide rail B1105. The two adjustable deformable electrolytic components 11 are respectively connected to the positive and negative poles of the power supply, and the plates 1110 on the guide rails B1105 of the two adjustable deformable electrolytic components 11 are respectively divided into anode and cathode. An oxidation reaction occurs at the anode, and the metal atoms in the anode plate 1110 (usually an iron plate or an aluminum plate) lose electrons to form ions and enter the solution. The metal ions in the solution then form hydroxides and form flocs with the pollutants to complete the flocculation effect.

[0055] Pollutants can be directly oxidized on the surface of the anode plate 1110, so electrocoagulation can also remove various organic and inorganic aerobic substances, such as sulfides, ammonia, aromatic amines, oil and other COD; at the same time, because a reduction reaction can occur on the surface of the cathode plate 1110, electrocoagulation can have a good decolorization effect when there is color in the water.

[0056] The power supply of the two motors 1107 can adopt a 360-degree rotating power supply structure, or the metal conduction wheel 1103 can be rotated several times and then reversed to prevent the wires from being entangled. The rotation of the motor 1107 is coordinated with the movement of the worm gear drive 1104. The worm gear drive 1104 contains structures such as worm wheels and worms, which can provide large torque rotation, thereby dragging a large number of pole plates 1110 to move.

[0057] The pole plates 1110 are arranged at equal distances on the guide rail B1105. The pole plates 1110 included in the two adjustable deformable electrolytic components 11 are staggered with each other, and the staggered spacing of the pole plates 1110 included in the two adjustable deformable electrolytic components 11 are the same. When the pole plates 1110 of the two adjustable deformable electrolytic components 11 overlap, the pole plates 1110 of the overlapping parts are all in a longitudinal downward state and are below the wastewater liquid level. The pole plates 1110 on the other guide rail B1105 are all longitudinally upward, above the wastewater liquid level, and between the grinding plate base plate 10, and at this time the guide rail A1101 rotates forty-five degrees.

[0058] When one set of plates 1110 participates in the reaction, the other set of plates 1110 is not affected for maintenance or replacement.

[0059] The distances between the aeration box B4 and the pole plate 1110 are the same. The pole plate 1110 can be inserted between two adjacent aeration boxes B4 during transfer. Any pole plate 1110 passes between two adjacent aeration boxes B4. The two sides of the pole plate 1110 correspond to the jet holes B5 on the two aeration boxes B4.

[0060] The gas ejected from the jet hole B5 can clean the flocculated deposits on the electrode plate 1110 and maintain the electrolytic capacity of the electrode plate 1110 .

[0061] The grinding plate substrate 10 is an arc-shaped structure, the center of the grinding plate substrate 10 corresponds to the center of the metal conductive wheel 1103, the distance between the pole plate 1110 and the corresponding grinding plate substrate 10 is the same, and any pole plate 1110 can pass between two adjacent grinding plate substrates 10 when transferred.

[0062] Under the rotation of large torque, when the pole plate 1110 passes through the grinding plate substrate 10, the hard attachment on the surface can be cleaned, or after adding a grinding tool, the passivation film on the surface of the pole plate 1110 can be cleaned through multiple reciprocating movements.

[0063] When the guide rail B1105 drives the electrode plate 1110 to pass between the aeration box B4 and the grinding plate base plate 10, the guide rail B1105 can use the motor 1107, the screw rod 1108 and the screw sleeve 1109 to drive the scissor-type lifting rod 1106 to gradually reduce the distance between the guide rail A1101.

[0064] Thus, the pole plate 1110 will also move laterally when rotating.

[0065] The cover plates 9 are all arc-shaped structures, and the two cover plates 9 are symmetrically arranged. Rocker arms 12 are fixedly installed on the hinge shafts of the cover plates 9 and the heavy metal wastewater treatment tank 1. Two hydraulic cylinders 13 are hinged on the back of the heavy metal wastewater treatment tank 1, and the output shafts of the hydraulic cylinders 13 are hinged to the end of the rocker arm 12 away from the rotating shaft.

[0066] The hydraulic cylinder 13 can ensure the sealing between the cover plate 9 and the heavy metal wastewater treatment tank 1, and can also control the opening of the cover plate 9. A hydraulic device can be installed outside the machine to provide power to the hydraulic cylinder 13.

[0067] Auxiliary plates 14 are fixedly mounted on the front and rear side walls of the heavy metal wastewater treatment tank 1 , and the metal conduction wheel 1103 and the worm gear drive 1104 are mounted on the auxiliary plates 14 . The shape of the auxiliary plates 14 matches the two cover plates 9 .

[0068] When in use, the heavy metal wastewater treatment pool 1 is filled with wastewater containing heavy metals, and two worm gear drives 1104 rotate the metal conduction wheel 1103, and then the guide rails B1105 of the two adjustable deformable electrolytic components 11 are driven to carry the plates 1110 into the wastewater, and then the grinding plate substrates 10 face downward and overlap alternately, and the anode plates 1110 and cathode plates 1110 play the role of each other, and the overlapping plates 1110 have the same and close gap, which is used for electrolytic flocculation. When sacrificing the anode, the bubbles released by the cathode can also slow down the passivation degree of the anode. When the aeration box A2 and the aeration box B4 are aerating, the flocculation can be floated during the electrolytic flocculation, and then the floated flocculation always flows in the wastewater and gradually transfers to the surface of the wastewater. During aeration, the two sets of plates 1110 participating in the electrolysis are not easily attached to the flocculation due to the effect of the water flow. Then, after the electrode plate 1110 in the wastewater has been used for a period of time, the worm gear drive 1104 drives the metal conduction wheel 1103 to rotate, and at this time, the two guide rails A1101 rotate with the two guide rails B1105, and a group of electrode plates 1110 on the other guide rail B1105 begin to replace the electrode plates 1110 previously in the wastewater, and slowly move into the wastewater, while the used electrode plates 1110 will leave the wastewater, gradually approach the rotation point during the movement, and first move to the aeration box B4, at which time the bubbles blown out from the side of the aeration box B4 will clean the attachments on the surface of the electrode plate 1110, and then the electrode plate 1110 continues to rotate and moves horizontally to the grinding plate substrate 10, and the two adjacent grinding plate substrates 10 clamp the electrode plate 1110, which can clean the surface of the electrode plate 1110, and treat the passivation film on the surface of the passivated anode electrode plate 1110 and the attachments on the cathode surface;

[0069] At the same time, driven by the hydraulic cylinder 13, the cover 9 can be opened or closed. After the cover 9 is opened, the electrode plate 1110 on the top can be exposed. At this time, the electrode plate 1110 can be a electrode plate 1110 that has been used for multiple reactions. The maintenance personnel can inspect or replace the electrode plate 1110. During the inspection and replacement process, the other set of electrode plates 1110 still plays an electrolytic role, so it does not affect the electrocoagulation process. After opening the cover 9, sandpaper or other grinding tools with grinding function can be added between the grinding plate substrate 10. After opening the cover 9, the heavy metal wastewater treatment pool 1 can also be cleaned.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0071] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrocoagulation treatment device for heavy metal-containing wastewater, comprising a heavy metal wastewater treatment tank (1), a wastewater inlet being installed on the side of the heavy metal wastewater treatment tank (1), and a wastewater outlet being installed on the bottom wall of the heavy metal wastewater treatment tank (1), characterized in that: An aeration box A (2) is fixedly installed at the bottom of the heavy metal wastewater treatment tank (1), the upper end of the aeration box A (2) is located in the heavy metal wastewater treatment tank (1), a plurality of jet holes A (3) are provided on the upper surface of the aeration box A (2), the jet holes A (3) are connected to the heavy metal wastewater treatment tank (1) and the aeration box A (2), a plurality of aeration boxes B (4) are fixedly installed on the side walls of the heavy metal wastewater treatment tank (1), the plurality of aeration boxes B (4) are at the same distance from each other, and a front and rear side walls of the aeration box B (4) are provided with A plurality of air jet holes B (5), the side wall and the bottom wall of the heavy metal wastewater treatment tank (1) are fixedly mounted with airtight gas separation boxes (6), a plurality of aeration boxes B (4) are connected to the side airtight gas separation boxes (6), an aeration box A (2) is connected to the bottom airtight gas separation box (6), the airtight gas separation box (6) on the side of the heavy metal wastewater treatment tank (1) and the airtight gas separation box (6) on the bottom wall of the heavy metal wastewater treatment tank (1) are connected by a connecting pipe (7), and an air inlet pipe (8) is mounted on the side airtight gas separation box (6); Two cover plates (9) are installed at the upper end of the heavy metal wastewater treatment tank (1). The cover plates (9) can be opened automatically. When the two cover plates (9) are closed, they seal the upper end of the heavy metal wastewater treatment tank (1). A plurality of grinding plate base plates (10) are fixedly installed on the inner wall of each cover plate (9). The grinding plate base plates (10) are spaced at the same distance from each other. Two groups of adjustable deformable electrolytic components (11) are installed in a heavy metal wastewater treatment tank (1). The two groups of adjustable deformable electrolytic components (11) are arranged in an alternating manner. The adjustable deformable electrolytic components (11) can rotate in the heavy metal wastewater treatment tank (1). The adjustable deformable electrolytic components (11) include an electrode plate (1110). When rotating, the electrode plate (1110) can be inserted between two adjacent aeration boxes B (4). When transferring, the electrode plate (1110) can pass between two adjacent grinding plate substrates (10).

2. The electrocoagulation treatment device for heavy metal-containing wastewater according to claim 1, characterized in that: The adjustable deformable electrolytic component (11) comprises a guide rail A (1101), two guide rails A (1101) are provided, and poles (1102) are installed at both ends of the guide rails A (1101); It comprises two metal conduction wheels (1103) located at both ends of two guide rails A (1101), two poles (1102) at one end away from the guide rail A (1101) are fixed to the metal conduction wheel (1103), and the other end of the metal conduction wheel (1103) penetrates the heavy metal wastewater treatment tank (1) and is rotatably connected thereto; It comprises two worm gear type driving machines (1104), both of which are fixed outside the heavy metal wastewater treatment tank (1), and the output ends of which are connected to the main shaft of the metal conduction wheel (1103); It comprises two guide rails B (1105), which are respectively located on the sides of the two guide rails A (1101) that are away from each other; It comprises a scissor-type lifting rod (1106), which is provided with two groups and is located between the guide rail A (1101) and the guide rail B (1105), one end of which is respectively hinged to the guide rail A (1101) and the guide rail B (1105), and the other end is slidably connected to the guide rail A (1101) and the guide rail B (1105); It comprises two motors (1107) which are fixed between two guide rails A (1101). The output shafts of the motors (1107) are fixedly mounted with screw rods (1108). The other ends of the screw rods (1108) are rotatably connected to the guide rails A (1101). The outsides of the screw rods (1108) are mounted with screw sleeves (1109). The two screw sleeves (1109) are threadedly matched. The screw sleeves (1109) are connected to the sliding ends of the corresponding scissor-type lifting rods (1106). Two groups of pole plates (1110) are provided, each group having a plurality of pole plates, and the two groups of pole plates (1110) are respectively fixed to ends of two guide rails B (1105) that are away from each other.

3. The electro-flocculation treatment device for heavy metal-containing wastewater according to claim 2, characterized in that: The electrode plates (1110) are arranged at equal distances on the guide rail B (1105); the electrode plates (1110) included in the two adjustable deformable electrolytic components (11) are arranged in an interlaced manner, and the interlaced spacings of the electrode plates (1110) included in the two adjustable deformable electrolytic components (11) are the same; when the electrode plates (1110) of the two adjustable deformable electrolytic components (11) overlap, the electrode plates (1110) of the overlapping portion are all in a longitudinally downward state and are below the wastewater liquid level; the electrode plates (1110) on the other guide rail B (1105) are all longitudinally upward, above the wastewater liquid level, and between the grinding plate base plate (10), and at this time, the guide rail A (1101) is rotated forty-five degrees.

4. The electro-flocculation treatment device for heavy metal-containing wastewater according to claim 3, characterized in that: The distances between the aeration box B (4) and the electrode plate (1110) are the same, and the two side surfaces of the electrode plate (1110) correspond to the two air injection holes B (5) on the aeration box B (4).

5. The electro-flocculation treatment device for heavy metal-containing wastewater according to claim 4, characterized in that: The grinding plate substrate (10) is an arc-shaped structure, the center of the grinding plate substrate (10) corresponds to the center position of the metal conductive wheel (1103), and the distance between the electrode plate (1110) and the corresponding grinding plate substrate (10) is the same.

6. The electro-flocculation treatment device for heavy metal-containing wastewater according to claim 5, characterized in that: When the guide rail B (1105) drives the electrode plate (1110) to pass between the aeration box B (4) and the grinding plate base plate (10), the guide rail B (1105) can use the motor (1107), the screw rod (1108) and the screw sleeve (1109) to drive the scissor-type lifting rod (1106) to gradually reduce the distance between the guide rail B (1101).

7. The electro-flocculation treatment device for heavy metal-containing wastewater according to claim 2, characterized in that: The cover plates (9) are all of arc-shaped structure, and the two cover plates (9) are symmetrically arranged. Rocker arms (12) are fixedly mounted on the hinge shafts of the cover plates (9) and the heavy metal wastewater treatment tank (1). The back of the heavy metal wastewater treatment tank (1) is hinged with two hydraulic cylinders (13), and the output shafts of the hydraulic cylinders (13) are hinged to one end of the rocker arm (12) away from the rotating shaft.

8. The electro-flocculation treatment device for heavy metal-containing wastewater according to claim 7, characterized in that: Auxiliary plates (14) are fixedly mounted on the front and rear side walls of the heavy metal wastewater treatment tank (1), and the metal conduction wheel (1103) and the worm gear drive (1104) are mounted on the auxiliary plates (14). The shape of the auxiliary plates (14) matches the two cover plates (9).

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