Electrochemical sewage treatment system

Abstract

The utility model discloses an electrochemical sewage treatment system which is provided with a plurality of communicated containers which are sequentially arranged from upstream to downstream, an electrode group electrically connected with a power supply is arranged in an accommodating space of each container, and a water inlet of each container is lower than a water outlet. The water outlet of the upstream container in the two upstream and downstream adjacent containers is higher than the water outlet of the downstream container, so that sewage subjected to electrochemical treatment in the upstream container can stably flow into the downstream container from the water outlet of the upstream container through a pipeline under the action of water head difference; according to the multi-stage electrochemical sewage treatment device, the sewage sequentially flows through the accommodating spaces of the containers, is subjected to multi-stage electrochemical treatment and then is discharged from the water outlet of the most downstream container, so that the standard discharge of the water body is realized, and a multi-stage treatment mode is adopted, so that the retention time of the sewage in the accommodating spaces can be greatly reduced; furthermore, the treatment efficiency and quality of the industrial sewage are greatly improved, and the treatment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an electrochemical sewage treatment system. Background Art

[0002] In recent years, with the rapid development of domestic industry, a large amount of industrial sewage and wastewater (such as industrial sewage and wastewater from chemical polishing, electroplating, anodizing, cleaning, dyeing, degreasing, grinding, PCB circuits, etc.) are inevitably generated. They must be treated to meet the emission standards before they can be discharged. Otherwise, they will cause serious damage to the surrounding groundwater, soil, surface water or other receiving water environments.

[0003] At present, the sewage treatment processes widely used in the market mainly include traditional chemical treatment, biochemical treatment and other methods. When using traditional chemical treatment, biochemical treatment and other methods to treat sewage, a large amount of infrastructure (including but not limited to collection tanks, regulating tanks, reaction tanks, biochemical tanks, etc.) must be built in the early stage, which occupies a large space and has high construction costs. In addition, a large amount of various corresponding chemical raw materials and / or reagents need to be added during the chemical treatment process, so the corresponding operation and treatment costs are high; at the same time, after a large amount of chemical raw materials added react chemically and neutralize with the components in the sewage, a large amount of solid sediment is generated, which will cause secondary pollution. If the solid sediment is further treated biochemically, the operating cost will be higher and the operation will be very cumbersome.

[0004] Of course, the existing technology also has electrochemical sewage treatment processes (such as electrolytic oxidation, electrolytic reduction, electrocoagulation, electroflocculation, etc.) for industrial sewage treatment. It does not have the defects of the above traditional chemical treatment, biochemical treatment and other methods, and has the advantages of small initial investment, high degree of automation, low sewage operation and treatment costs, and no secondary pollution. However, the current electrochemical sewage treatment process adopts a one-stop one-time treatment, that is, a DC power supply is connected to an electrode plate tank for electrochemical sewage treatment. In this form of electrochemical sewage treatment, the sewage needs to stay in the electrode plate tank for a long time for electrochemical treatment, and it is difficult to make the treated sewage meet the standards of environmental protection requirements. For this reason, the existing electrochemical sewage treatment process is basically not widely recognized by people, and the market share is extremely low, almost zero. Utility Model Content

[0005] The main purpose of the utility model is to provide an electrochemical sewage treatment system, aiming to improve the treatment efficiency and quality of industrial sewage and reduce the treatment cost.

[0006] To achieve the above-mentioned purpose, the utility model proposes an electrochemical sewage treatment system, comprising a plurality of containers arranged in sequence from upstream to downstream, each container having a hollow interior defining a accommodating space, an electrode group electrically connectable to a power source being arranged in the accommodating space, a side wall of each container having a water inlet and a water outlet connected to the accommodating space, the water inlet of each container being lower than the water outlet, and the water outlet of the container located at the upstream position of the two adjacent containers upstream and downstream being higher than the water outlet of the container located at the downstream position, the water outlet of the container located at the upstream position of the two adjacent containers upstream and downstream being connected to the water inlet at the downstream position through a pipeline, and the water inlet of the container located at the most upstream position being connected to the sewage supply end.

[0007] The technical solution of the utility model sets a plurality of containers which are sequentially arranged from upstream to downstream and are connected to each other, and an electrode group electrically connected to a power supply is arranged in the accommodating space of each container to form a multi-level electrochemical treatment area, the water inlet of each container is lower than the water outlet, and the water outlet of the container located at the upstream position of the two adjacent containers upstream and downstream is higher than the water outlet of the container located at the downstream position, so that the sewage after electrochemical treatment in the container located at the upstream position can flow smoothly from its water outlet through the pipeline into the container at the downstream position under the action of the water head difference, so that the sewage inside the container at the upstream position after electrochemical treatment can be discharged smoothly from the water outlet through the pipeline into the container at the downstream position without providing an additional driving source (such as a water pump). The treated sewage is input into the interior of the container at the downstream position for further electrochemical treatment, which can save the manufacturing cost and operating cost of the system. At the same time, the method of transporting the treated sewage to the container at the downstream position through the head difference can ensure that the water flow in the container is relatively stable, thereby improving the sewage treatment effect. Finally, it flows through the holding space of multiple containers in sequence and undergoes multi-stage electrochemical treatment before being discharged from the outlet of the container at the downstream position, achieving water discharge that meets the standards. The utility model adopts a multi-stage treatment method, which can greatly reduce the residence time of sewage in the holding space, thereby greatly improving the treatment efficiency and quality of industrial sewage and reducing treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of some embodiments of the utility model;

[0009] Figure 2 It is a three-dimensional schematic diagram of a container and an electrode assembly at one angle;

[0010] Figure 3 is a three-dimensional schematic diagram of the container and the electrode assembly from another angle;

[0011] Figure 4 is a side view of the container and electrode assembly;

[0012] Figure 5 for Figure 4 Cross-sectional view along AA direction;

[0013] Figure 6 A schematic diagram of the cooperation between the cover body and the electrode assembly;

[0014] Figure 7 This is a schematic diagram of an ozone disinfection device, etc.;

[0015] Figure 8 Structural schematic diagrams of other embodiments of the utility model;

[0016] Fig. 9 for Figure 5 Cross-sectional view along direction BB. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "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 the indicated technical features. Therefore, the features defined as "first" or "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 the 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 the utility model.

[0020] The utility model provides an electrochemical sewage treatment system.

[0021] In the embodiment of the present utility model, Figures 1 to 9As shown, the electrochemical sewage treatment system includes a plurality of containers 1 arranged in sequence from upstream to downstream, each container 1 is hollow inside and defines a receiving space 10 for receiving sewage, and an electrode group 2 electrically connected to a power source 4 is arranged in the receiving space 10. When working, the electrode group 2 is at least partially immersed in the sewage. When the electrode group 2 is powered on, the sewage can be electrochemically treated to purify the water quality. The side wall of each container 1 is provided with a water inlet 11 and a water outlet 12 connected to the accommodating space 10. The water inlet 11 of each container 1 is lower than the water outlet 12, and the water outlet 12 of the container 1 located at the upstream position of the two adjacent containers 1 upstream and downstream is higher than the water outlet 12 of the container 1 located at the downstream position. The water outlet 12 of the container 1 located at the upstream position of the two adjacent containers 1 upstream and downstream is connected with the water inlet 11 located at the downstream position through a pipeline, so that the sewage electrochemically treated inside the container 1 located at the upstream position can flow smoothly from its water outlet 12 through the pipeline into the container 1 at the downstream position under the action of the head difference (or water level difference), so that the sewage electrochemically treated inside the container 1 at the upstream position can be input into the container 1 at the downstream position for further electrochemical treatment without providing an additional driving source (such as a water pump), which can save the manufacturing cost and operating cost of the system. At the same time, the method of transporting the treated sewage to the container 1 at the downstream position through the head difference can ensure that the water flow in the container 1 is relatively stable, thereby improving the sewage treatment effect. The water inlet 11 of the container 1 at the most upstream position is connected to the sewage supply end, and the sewage supply end inputs the sewage into the container 1 at the most upstream position through the water inlet 11. Finally, the sewage flows through the storage spaces 10 of multiple containers 1 in sequence and is discharged from the water outlet 12 of the container 1 at the most downstream position after multi-stage electrochemical treatment, so that the water body meets the discharge standards. The utility model adopts a multi-stage treatment method, which can greatly reduce the residence time of sewage in the storage space 10, thereby greatly improving the treatment efficiency and quality of industrial sewage and reducing the treatment cost.

[0022] It should be noted that the sewage inputted into the upstreammost container 1 from the sewage supply end may be industrial sewage that has not been preliminarily treated after industrial discharge, or industrial sewage that has been preliminarily treated (such as but not limited to ozone disinfection treatment) after industrial discharge. In addition, it can be understood that the upstream and downstream directions are determined according to the flow direction of the sewage in the multiple containers 1, wherein the container 1 whose water inlet 11 is connected to the sewage supply end is located at the upstreammost position.

[0023] In the embodiment of the present utility model, Figure 2 , Figure 3 and Fig. 9As shown, the electrode group 2 includes a plurality of electrode plates 21 arranged in parallel, and the polarities of two adjacent electrode plates 21 are opposite after power is applied. It should be noted that the parallelism here can be completely parallel or approximately parallel, that is, a small angle, such as 0 to 30 degrees, is allowed to be formed between the electrode plates 21. A filter grille 16 is arranged in the accommodation space 10, and the filter grille 16 divides the accommodation space 10 into an electrolysis area 101 and a precipitation area 102 located below the electrolysis area 101. The bottom end of each electrode plate 21 is connected to the filter grille 16, and the water inlet 11, the water outlet 12 and the electrode group 2 are located above the filter grille 16, and the top end extends out of the water surface of the sewage. The electrochemically generated floccules and / or the particles carried by the sewage can enter the sedimentation area 102 through the filter screen and precipitate, so as to greatly reduce the number of floccules and / or the particles carried by the sewage in the electrolysis area 101, thereby improving the electrochemical treatment efficiency and effect of the electrode group 2 on the sewage, and improving the utilization rate of electric energy. At the same time, it can prevent the floccules and / or the particles carried by the sewage from accumulating in large quantities between the electrode plates 21 and causing the electrode group 2 to short-circuit. The intervals between the adjacent electrode plates 21 form an electrolysis flow channel 210, and the side wall of the container 1 opposite to the plate surface of the first electrode plate 21 is the first box wall 1-1. The interval between the first box wall 1-1 and the first electrode plate 21 forms a first flow channel 211, and the water inlet 11 is arranged at the position of the first box wall 1-1 corresponding to the lower part of the first electrode plate 21. The side wall of the container 1 opposite to the plate surface of the tail electrode plate 21 is the second box wall 1-2, and the interval between the second box wall 1-2 and the tail electrode plate 21 forms a second flow channel 212. The water outlet 12 is arranged at the position of the second box wall 1-2 corresponding to the upper part of the tail electrode plate 21, so that the water inlet 11 and the water outlet are arranged diagonally. The side wall of the container 1 opposite to one side end of all electrode plates 21 is the third box wall 1-3, and the interval between the third box wall 1-3 and all electrode plates 21 forms a third flow channel 213 connected to the first flow channel 211 and the electrolysis flow channel 210, and the path of the third flow channel 213 to the water outlet 12 through the second flow channel 212 is blocked, so that the sewage flowing from the first flow channel 211 into the third flow channel 212 can only flow into the electrolysis flow channel 210, and cannot flow to the water outlet 12 through the second flow channel 212. The side wall of the container 1 opposite to the other side end of all the electrode plates 21 is the fourth box wall 1-4, and the interval between the fourth box wall 1-4 and all the electrode plates 21 forms a fourth flow channel 214 connected to the second flow channel 212 and the electrolysis flow channel 210, and the path of the first flow channel 211 from the water inlet 11 to the fourth flow channel 214 is blocked, so that the sewage flowing into the first flow channel 211 through the water inlet 11 can only flow into the third flow channel 213 through the first flow channel 211, and cannot flow from the first flow channel 211 directly to the water outlet 12 through the fourth flow channel 214.Finally, the sewage flowing in through the water inlet 11 flows along the path of the first flow channel 211-the third flow channel 213-the electrolysis flow channel 210-the fourth flow channel 214-the second flow channel 212-the water outlet 12. This flow path can make the distance and resistance of the sewage flowing from the water inlet 11 to the water outlet 12 basically the same, so that the sewage flowing into the containing space from the water inlet 11 can flow through each electrolysis flow channel 210 at basically the same flow rate and direction, so that each stream of sewage can obtain a larger area of ​​electrochemical reaction, and can ensure that the overall flow direction of the sewage is basically perpendicular to the movement direction of ions between the electrode plates, so that the sewage can obtain a more uniform electrochemical treatment effect, and can greatly reduce the residence time of the sewage in the containing space, improve the efficiency and quality of sewage treatment, and save electricity and treatment costs.

[0024] It should be noted that the above-mentioned first and last plates are defined according to the arrangement order of the electrode plates 21 in the accommodating space, wherein the electrode plate 21 with the plate surface facing the water inlet is the first electrode plate, and the electrode plate 21 farthest from the water inlet 11 is the last electrode plate.

[0025] Furthermore, the water outlet 12 is close to or opposite to the fourth flow channel 214, preferably opposite to each other, which can reduce the resistance of sewage when flowing from the fourth flow channel 214 to the water outlet 12, making the sewage flow more smoothly; the water inlet 11 is close to or opposite to the third flow channel 213, preferably opposite to each other, so that the water inlet 11 and the water outlet 12 form a three-dimensional diagonal design, which can reduce the resistance of sewage when flowing from the water inlet 11 to the third flow channel 213, making the sewage flow more smoothly, so that the sewage flowing into the water inlet 11 can flow to the water outlet 12 evenly and stably, and the sewage treatment effect is better.

[0026] It should be noted that the principle of electrochemical treatment of sewage when the electrode plate 21 is energized is well known to those skilled in the art and will not be described in detail here.

[0027] In the embodiment of the present utility model, Fig. 9As shown, a first block 200 is provided in the first area from the first flow channel 211 corresponding to the water inlet 11 to the fourth flow channel 214 corresponding to the other side end of the first electrode plate 21, so as to block the path of the first flow channel 211 from the water inlet 11 to the fourth flow channel 214, and the first block 200 may occupy the entire first area, or only a part of the first area. A second block 100 is provided in the second area from the third flow channel 213 corresponding to the end of the tail electrode plate 21 to the second flow channel 212 corresponding to the water outlet 12, so as to block the path of the third flow channel 213 through the second flow channel 212 to the water outlet 12, and the second block 100 may occupy the entire second area, or only a part of the second area. It can be understood that the first block 200 and the second block 100 are generally made of insulating materials or coated with insulating materials, and the bottom ends of the first block 200 and the second block 100 are connected to the filter grille 16, and the top ends are exposed to the surface of the sewage.

[0028] The number of electrode plates 21 can be determined according to the processing requirements, for example, 2 to 100, preferably 10 to 30, to take into account the processing effect, efficiency and equipment cost control. More preferably, 15 to 25, for example, 18, 19, 20, 21 or 22, etc.

[0029] Specifically, the number of the containers 1 can be determined according to the treatment requirements (type of sewage), and can be 2 to 10, generally 3, 4, 5, 6, 7 or 8, etc. Figure 1 The multiple containers 1 can be arranged in a straight line or non-straight line in the same row, or divided into multiple rows, such as Figure 1 The diagram shows a two-row distribution, each row having three containers 1. That is, the upstream and downstream distribution directions may be linear or non-linear.

[0030] It is understandable that the container 1 can have a variety of embodiments, such as a rectangular parallelepiped, cylindrical, prism-shaped or irregular box-shaped structure. In some embodiments of the present invention, the container 1 is preferably a rectangular parallelepiped box-shaped structure. The accommodating space can be rectangular parallelepiped, cylindrical, or octagonal prism-shaped, etc., preferably rectangular parallelepiped.

[0031] Furthermore, if Figure 1 , Figure 2 and Figure 5 As shown, a mud discharge port 13 for connecting to the outside is formed at the bottom of the sedimentation area 102, and sludge formed by flocculants and / or particles contained in sewage in the sedimentation area 102 can be discharged regularly or irregularly through the mud discharge port 13.

[0032] Specifically, Figure 5As shown, the sedimentation area 102 is in the shape of a trapezoid with a large top and a small bottom, or the sedimentation area 102 is horizontally divided into a plurality of trapezoidal areas with a large top and a small bottom, so as to better concentrate the sludge in a smaller bottom area, thereby better discharging the sludge. The number of the sludge discharge ports 13 may be one or more, and when there are multiple, preferably two, which are spaced apart along the length direction of the bottom wall of the sedimentation area 102 to facilitate the discharge of the sludge. The sludge discharge port 13 is connected to the external sludge collection area through a sludge discharge pipe 131 to discharge the sludge regularly or irregularly. If necessary, a valve (not shown) may be provided at the sludge discharge port 13 to better control the discharge of the sludge. The sludge entering the sludge collection area can be subsequently processed. The specific method of collecting the sludge can adopt the existing technology, which will not be described here.

[0033] It should be noted that the principle of electrochemical treatment of sewage when the electrode plate 21 is energized is well known to those skilled in the art and will not be described in detail here.

[0034] It is understandable that when the utility model is working, the surface of the sewage in the storage space 10 is generally spaced a certain distance from the top wall of the storage space 10. During the electrochemical treatment of the sewage, foam will generally be generated. The foam floats on the surface of the sewage and needs to be cleaned regularly or irregularly. Figure 1 As shown, an air inlet 14 can be provided at a position above the water surface corresponding to one side wall of the container 1 (such as the first box wall 1-1), and a foam outlet 15 can be provided at a position above the water surface corresponding to the other side wall of the container 1 (such as the second box wall 1-2). Blowing air inward at the air inlet 14 can make the foam on the water surface move toward the foam outlet 15 and finally be discharged through the foam outlet 15. Specifically, in this embodiment, the air inlet 14 can be connected to an external high-pressure air source (such as an air pump, not shown) through a pipeline (not shown), and the foam outlet 15 is connected to a foam collection area (not shown) through a pipeline. When the high-pressure air source is working, air is blown into the space of the accommodating space 10 above the water surface through the air inlet 14, so that the foam finally flows to the foam collection area through the foam outlet 15.

[0035] Understandably, if Figure 2 , Figure 5 As shown, the container 1 includes a trough body 1A with an open top and a cover body 1B that can close the open top of the trough body 1A, and the trough body 1A and the cover body 1B enclose the accommodating space 10. The trough body 1A and the cover body 1B are made of insulating materials or covered with insulating materials, and the electrode group 2 is installed on the cover body 1B or installed on the trough body 1A through an insulating bracket (not shown), and the bottom surface is supported by a filter grille 16. In order to facilitate the electrical connection between the electrode group 2 and the power source 4, the electrode group 2 is installed on the cover body 1B and the upper end extends out of the cover body 1B.

[0036] Furthermore, if Figure 1As shown, in some embodiments, the utility model further includes a power supply 4, which is electrically connected to the electrode group 2, so that the electrode group 2 is energized to perform electrochemical treatment on the sewage. The power supply 4 has multiple implementation modes, and can be a DC power supply or a high-frequency pulse power supply, etc., preferably a high-frequency pulse power supply. The use of a high-frequency pulse power supply can periodically change the polarity of the electrode plate 21, greatly alleviating the passivation phenomenon of the electrode plate 21, thereby reducing the surface cleaning work of the electrode plate 21 caused by the passivation of the electrode plate 21, and can improve the chemical oxidation effect of the electrode plate 21 on the sewage.

[0037] It is understandable that the current, voltage (obtained by connecting the electrode plates 21 in series and in parallel, which belongs to the prior art), interval and material of the electrode plates 21 can be set according to actual conditions (for example, according to basic data of sewage). The basic data of sewage can be obtained by sampling and testing according to its type.

[0038] For example, assuming that the conductivity of sewage is extremely high and the pH is low (less than 2), the interval between the electrode plates 21 needs to be set larger, and the current and voltage need to be set smaller to prevent the power supply 4 from being overloaded instantly. And because the pH is low, the material of the electrode plate 21 can be selected from aluminum to avoid the corrosion of the iron electrode plate 21 due to the acidity of the sewage, and to shorten the service life of the electrode plate 21. As the sewage is continuously electrolyzed and oxidized, the pH value in the water will gradually increase. For the container 1 where the pH of the sewage reaches a certain value, the electrode plate 21 therein can be selected from an iron electrode plate 21. The iron electrode plate 21 and the aluminum electrode plate 21 have different effects. When choosing, it is necessary to select according to the test data of the sewage and give full play to their respective advantages. The parameters of the electrode plate 21 located inside the downstream container 1 should be determined based on the data of the sewage detection after electrochemical treatment in the upstream container 1. By analogy, the required technical parameters of the electrode plate 21 for treating this type of sewage can be obtained, thereby designing a treatment system that can accurately and efficiently treat various types of sewage, so as to thoroughly meet the technical requirements for the treatment of various types of sewage and ensure that the treated sewage strictly meets the national emission standards.

[0039] Furthermore, in some embodiments of the present invention, Figure 1 As shown, it also includes a control system 6 and a water quality sensor 3. The water quality sensor 3 is arranged in the accommodating space 10 and can monitor the water quality of the sewage. The monitoring parameters depend on the type of sewage, including but not limited to monitoring at least one of the water quality parameters such as pH value, COD, conductivity, etc. in the sewage. The water quality sensor 3 and the power supply 4 are electrically connected to the control system 6. The control system 6 can adjust the parameters such as voltage and current between the electrode plates 21 according to the water quality parameters fed back by the water quality sensor 3, so as to better chemically treat the sewage.

[0040] Furthermore, for sewage with particularly severe pollution, a small amount of chemical agents can be added to the sewage. To this end, some embodiments of the utility model further include a chemical agent adder 7 (such as a dosing membrane pump), which is connected to the container space 10 and is used to input the chemical agent into the corresponding container space 10. Thus, the electrochemical sewage treatment system of the utility model can be applied to more types of sewage treatment.

[0041] Further, in some embodiments of the present invention, Figure 1 , Figure 7 As shown, it also includes an ozone disinfection device 5, which is connected to the water inlet 11 of the container 1 at the most upstream position. The sewage is sterilized, disinfected and decolorized by the ozone disinfection device and then flows into the storage space 10 of the container 1 at the most upstream position through the water inlet 11.

[0042] Specifically, Figure 1 , Figure 7 As shown, the ozone disinfection device 5 includes a disinfection chamber 51, an ozone generator 52 and a circulation pump 53. The water inlet end of the disinfection chamber 51 is connected to the sewage input end (such as through a sewage input pipe 300), and the water outlet end is connected to the water inlet 11 of the upstream container 1 (such as through a sewage output pipe 511). The water inlet end of the circulation pump 53 is connected to the ozone supply pipe 57 and one end of the input pipe 55. The other end of the ozone supply pipe 57 is connected to the ozone generator 52, and the other end of the input pipe 55 is connected to the disinfection chamber 51, and the input pipe 55 is also equipped with an atomizer 54. The water outlet end of the circulation pump 53 is connected to the disinfection chamber 51 through the output pipe 56, so that the circulation pump 53, the output pipe 56, the input pipe 55, and the atomizer 54 form a circulation loop. During operation, the sewage input end drives the sewage into the disinfection chamber 51 through a water pump or water level difference. Part of the sewage in the disinfection chamber 51 can flow to the atomizer 54 along the input pipe 55 under the action of the circulating pump 53, and after being atomized by the atomizer, it is mixed with the ozone supplied to the circulating pump 53 through the ozone supply pipe 57 to form a water mist with ozone, and finally flows through the circulating pump 53 and the output pipe into the disinfection chamber 51 to disinfect the sewage in the disinfection chamber 51 with ozone, and circulate continuously to improve the utilization rate of ozone and the ozone disinfection effect of sewage. The sewage in the disinfection chamber 51 after ozone disinfection flows into the storage space 10 of the most upstream container 1 for electrochemical treatment.

[0043] Optionally, the shape of the disinfection chamber 51 can be implemented in various ways, such as a box shape, a cylinder shape, or a straight tube or a curved tube shape with both ends closed. Figure 1 The disinfection chamber 51 shown is an S-shaped tube with both ends closed. This shape can ensure that the sewage can be disinfected by ozone more fully and improve the ozone disinfection effect.

[0044] Furthermore, in some embodiments of the utility model, a bracket 8 and a protective cover 9 are also included. The power supply 4, container 1, ozone disinfection device and other components are arranged on the bracket 8. The protective cover 9 is arranged on the bracket 8, and the power supply 4, container 1, ozone disinfection device 5 and other components are covered therein to play a protective role. Specifically, the protective cover 9 is composed of a frame 91 and a panel 92 arranged on the periphery of the frame 91. The panel 92 can be made of transparent, translucent or opaque materials. Preferably, the bracket 8, frame 91 and panel 92 can be made of corrosion-resistant and relatively strong materials, wherein the bracket 8 and frame 91 can be made of stainless steel (such as SUS304 stainless steel). In order to facilitate the staff to protect the inside of the protective cover 9, at least one side panel 92 should be designed as a door panel structure to facilitate the opening and closing of the passage at this position.

[0045] Furthermore, the bottom of the bracket 8 is also equipped with an adjustable support foot 81 and / or roller 82 to facilitate supporting and / or moving the electrochemical sewage treatment system of the utility model. When the support foot 81 and the roller 82 are installed at the same time, the support foot 81 is adjusted to support the electrochemical sewage treatment system on the ground, which can prevent the electrochemical sewage treatment system from moving. When the support foot 81 is adjusted to leave the ground and the electrochemical sewage treatment system is supported on the ground by the roller 82, the electrochemical sewage treatment system can be moved by the roller 82.

[0046] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An electrochemical sewage treatment system, characterized in that: The invention comprises a plurality of containers (1) arranged in sequence from upstream to downstream, each container (1) is hollow inside and defines a receiving space (10), an electrode group (2) which can be electrically connected to a power source (4) is arranged in the receiving space (10), a water inlet (11) and a water outlet (12) which are connected to the receiving space (10) are arranged on the side wall of each container (1), the water inlet (11) of each container (1) is lower than the water outlet (12), and the water outlet (12) of the container (1) located at the upstream position of two containers (1) adjacent to each other upstream and downstream is higher than the water outlet (12) of the container (1) located at the downstream position, the water outlet (12) of the container (1) located at the upstream position of the two containers (1) adjacent to each other upstream and downstream is connected to the water inlet (11) located at the downstream position through a pipeline, and the water inlet (11) of the container (1) located at the most upstream position is connected to a sewage supply end.

2. The electrochemical wastewater treatment system according to claim 1, characterized in that: The electrode group (2) comprises a plurality of electrode plates (21) arranged in parallel, a filter grid (16) is arranged in the accommodation space (10), the filter grid (16) divides the accommodation space (10) into an electrolysis area (101) and a precipitation area (102) located below the electrolysis area (101), the bottom end of each electrode plate (21) is connected to the filter grid (16), and the interval between two adjacent electrode plates (21) forms an electrolysis flow channel (210), and the container ( 1) the side wall opposite to the plate surface of the first electrode plate (21) is a first box wall (1-1), the interval between the first box wall (1-1) and the first electrode plate (21) forms a first flow channel (211), the water inlet (11) is arranged at a position of the first box wall (1-1) corresponding to the lower part of the first electrode plate (21); the side wall of the container (1) opposite to the plate surface of the tail electrode plate (21) is a second box wall (1-2), the second box wall (1-2) and the tail electrode plate (21) are spaced apart from each other to form a first flow channel (211), and the water inlet (11) is arranged at a position of the first box wall (1-1) corresponding to the lower part of the first electrode plate (21); ) are spaced apart to form a second flow channel (212), and the water outlet (12) is arranged at a position of the second box wall (1-2) corresponding to the upper part of the tail electrode plate (21); the side wall of the container (1) opposite to one side end of all the electrode plates (21) is a third box wall (1-3), and the space between the third box wall (1-3) and all the electrode plates (21) forms a third flow channel (213) connected to the first flow channel (211) and the electrolysis flow channel (210), and the third flow channel (213) passes through The path from the second flow channel (212) to the water outlet (12) is blocked; the side wall of the container (1) opposite to the other side end of all the electrode plates (21) is a fourth box wall (1-4); the gap between the fourth box wall (1-4) and all the electrode plates (21) forms a fourth flow channel (214) connected to the second flow channel (212) and the electrolysis flow channel (210); and the path from the first flow channel (211) to the fourth flow channel (214) from the water inlet (11) is blocked.

3. The electrochemical wastewater treatment system according to claim 2, characterized in that: The bottom of the sedimentation area (102) is formed with a mud discharge port (13) for connecting to the outside, and the sedimentation area (102) is in a trapezoidal shape with a larger top and a smaller bottom, or the sedimentation area (102) is horizontally divided into a plurality of trapezoidal areas with a larger top and a smaller bottom.

4. The electrochemical wastewater treatment system according to claim 2, characterized in that: The water outlet (12) is close to or opposite to the fourth flow channel (214), and the water inlet (11) is close to or opposite to the third flow channel (213).

5. The electrochemical wastewater treatment system according to claim 1, characterized in that: An air inlet (14) is provided at a position above the water surface on one side wall of the container (1), and a foam discharge port (15) is provided at a position above the water surface on the other side wall of the container (1).

6. The electrochemical wastewater treatment system according to claim 2, characterized in that: A first stopper (200) is provided in a first area from the first flow channel (211) corresponding to the water inlet (11) to the fourth flow channel (214) corresponding to the other side end of the first electrode plate (21), and a second stopper (100) is provided in a second area from the third flow channel (213) corresponding to the one side end of the tail electrode plate (21) to the second flow channel (212) corresponding to the water outlet (12).

7. The electrochemical wastewater treatment system according to claim 1, characterized in that: It also includes a control system (6) and a water quality sensor (3). The water quality sensor (3) is arranged in the accommodating space (10) and can monitor the water quality of the sewage. The water quality sensor (3) and the power supply (4) are electrically connected to the control system (6).

8. The electrochemical wastewater treatment system according to claim 1, characterized in that: It also includes a chemical agent additive (7), which is connected to the storage space (10) of the container and is used to input the chemical agent into the corresponding storage space (10).

9. The electrochemical wastewater treatment system according to any one of claims 1 to 8, characterized in that: It also comprises an ozone disinfection device (5), wherein the ozone disinfection device (5) is connected to the water inlet of the container (1) at the most upstream position.

10. The electrochemical wastewater treatment system according to claim 9, characterized in that: The ozone disinfection device (5) comprises a disinfection chamber (51), an ozone generator (52) and a circulation pump (53). The water inlet end of the disinfection chamber (51) is connected to the sewage input end, and the water outlet end is connected to the water inlet (11) of the container (1) at the most upstream position. The water inlet end of the circulation pump (53) is connected to an ozone supply pipe (57) and one end of an input pipe (55). The other end of the ozone supply pipe (57) is connected to the ozone generator (52), and the other end of the input pipe (55) is connected to the disinfection chamber (51). The input pipe (55) is also equipped with an atomizer (54). The water outlet end of the circulation pump (53) is connected to the disinfection chamber (51) through an output pipe (56), so that the circulation pump (53), the output pipe (56), the input pipe (55) and the atomizer (54) form a circulation loop.

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