Electrolytic flocculation device and wastewater purification system

Abstract

The utility model discloses an electrolytic flocculation device and a wastewater purification system, and relates to the technical field of wastewater treatment.The electrolytic flocculation device comprises an electrolytic tank, a plurality of partition plates are arranged in the electrolytic tank and divide the interior of the electrolytic tank into a plurality of parallel electrolytic cabins, the multiple electrolytic cabins are sequentially communicated, and an electrode plate is arranged in any electrolytic cabin; a flow guide plate is arranged on the side, close to the partition plate, in the electrolysis cabin, a flow channel guiding flow towards the bottom of the electrolysis cabin is formed between the flow guide plate and the partition plate, the top end of the partition plate is lower than that of the flow guide plate, so that liquid overflows into the flow channel from one side of the partition plate through the top end of the partition plate, and a sewage draining outlet is formed in the bottom of the electrolysis cabin. According to the present invention, the full and stable flocculation effect can be provided, the problems of large flocculant consumption, serious field environment odor, poor working environment and the like are solved, and the hazardous waste treatment cost can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment, and in particular to an electrolytic flocculation device and a wastewater purification system. Background Art

[0002] For water used in production processes such as painting and coatings, the traditional purification process for the wastewater generated is generally to directly add flocculants to separate the paint residue from the water in the circulating water, and then manually remove it. The problem with this treatment method is that the dosage needs to be manually adjusted, and the agent is generally added directly to the circulating water tank without an additional mixing device. The agent cannot be dispersed in the tank in time and is not fully mixed with the water. As a result, excessive dosage is often required to ensure flocculation effect in the entire tank. Moreover, since the flocculant does not decompose and is removed as part of the waste, it also increases the generation of hazardous waste, increases the cost of hazardous waste disposal, and increases the overall production cost.

[0003] Therefore, in response to the above technical problems, how to provide a flocculation device that can replace the flocculation agent is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide an electrolytic flocculation device and a wastewater purification system, which can provide a relatively sufficient and stable flocculation effect. It not only solves the problems of large amount of flocculant used, serious odor in the on-site environment, and poor working environment, but also reduces the cost of hazardous waste treatment.

[0005] To achieve the above-mentioned object, the present application provides an electrolytic flocculation device, comprising an electrolytic box, wherein a plurality of partitions are provided in the electrolytic box, wherein the partitions divide the interior of the electrolytic box into a plurality of parallel electrolytic compartments, wherein the plurality of electrolytic compartments are sequentially connected, and an electrode plate is provided in the interior of any of the electrolytic compartments;

[0006] A guide plate is provided inside the electrolysis chamber near one side of the partition, and a flow channel is formed between the guide plate and the partition to guide the liquid to the bottom of the electrolysis chamber. The top of the partition is lower than the top of the guide plate, so that the liquid overflows from one side of the partition through the top of the partition into the flow channel, and a sewage outlet is provided at the bottom of the electrolysis chamber.

[0007] Preferably, the partition at the bottom of the electrolysis chamber is arranged in a V shape, and the bottom of the guide plate is provided with an inclined plate matching the V-shaped structure of the partition. The inclined plate is spaced apart from the bottom of the electrolysis chamber so that the liquid flows into the electrolysis chamber from the flow channel.

[0008] Preferably, the electrode plate comprises an anode plate provided on the separator and a cathode plate provided on the guide plate, or comprises a cathode plate provided on the separator and an anode plate provided on the guide plate, and the electrode plate is externally connected to a direct current;

[0009] The anode plate and the cathode plate are located on opposite end surfaces of the partition plate and the guide plate, and the electrode plate is located in the electrolysis chamber where the flow channel is not located.

[0010] Preferably, the adjacent electrolysis chambers are connected through the flow channel, and a liquid inlet tank is provided outside the electrolysis chamber at the head end, and the liquid in the liquid inlet tank overflows into the flow channel through the top of the partition.

[0011] Preferably, the liquid inlet tank is connected to the liquid inlet pipe, and a baffle covering part of the flow channel and the liquid inlet tank is provided on the top of the partition, the first side of the baffle is in contact with the guide plate, the second side and the third side of the baffle are in contact with the box wall of the electrolytic box, and the fourth side of the baffle is provided with a first regulating plate for adjusting the overflow water level. The baffle, the guide plate, the box wall of the electrolytic box and the first regulating plate together form an overflow tank, and the overflow tank is connected to the overflow pipe.

[0012] Preferably, a liquid outlet is provided on the partition of the electrolysis chamber at the end, the liquid outlet is located on the partition where the flow channel is not located, the liquid outlet is provided on the top of the partition, a liquid outlet chamber is provided outside the liquid outlet, and the liquid outlet chamber is connected to a liquid outlet pipe.

[0013] Preferably, the liquid outlet compartment is distributed around the electrolytic box, and a second regulating plate for adjusting the overflow water level is provided in the liquid outlet compartment. The second regulating plate divides the liquid outlet compartment into two compartments, one compartment corresponds to the liquid outlet hole, and the other compartment is provided with the liquid outlet pipe.

[0014] A wastewater purification system comprising:

[0015] The flocculation device is the electrolytic flocculation device described above, wherein the liquid inlet pipe of the flocculation device leads to a circulating water pool, and the circulating water pool is used to pass the wastewater into the electrolytic box;

[0016] an intermediate water tank, connected to the liquid outlet pipe of the flocculation device, and used for receiving the liquid discharged from the liquid outlet pipe;

[0017] A filter press, wherein the liquid inlet of the filter press is connected to the outlet of the intermediate water tank and the circulating water pool respectively, the liquid outlet of the filter press is connected to the circulating water pool, and the slag outlet of the filter press is connected to the slag tank.

[0018] Preferably, a wastewater pump and a liquid inlet valve are provided on the pipeline connecting the liquid inlet pipe of the flocculation device and the circulating water tank;

[0019] The sewage outlet of the flocculation device is externally connected to the liquid inlet of the filter press, and a sewage discharge solenoid valve is provided on the pipeline corresponding to the sewage outlet;

[0020] The liquid outlet pipe is also connected to the circulating water pool, and a mixing solenoid valve and a return solenoid valve are provided on the pipelines corresponding to the liquid outlet pipe and the intermediate water tank and the circulating water pool respectively;

[0021] A slag discharge solenoid valve is provided on the pipeline corresponding to the outlet of the intermediate water tank;

[0022] The liquid inlet of the filter press is provided with a feed pump, and a wastewater valve is provided on the pipeline corresponding to the filter press and the circulating water pool.

[0023] Preferably, a liquid level sensor is provided in the intermediate water tank for detecting the height of the liquid level therein.

[0024] Compared to the above background technology, this application achieves the same flocculation effect as traditional polymer flocculants through the principle of electrolytic flocculation. Furthermore, since no flocculants are used, the amount of paint residue produced is also less than that of the existing technology. The multi-stage electrolysis chamber inside the electrolytic box provides a more sufficient flocculation effect, making the separation of residue and water in the circulating water more thorough. The liquid overflows through the flow channel into the bottom of the electrolysis chamber. The liquid flows from bottom to top within the electrolysis chamber, effectively avoiding the impact of water flow on the flocculation effect, thereby achieving a more stable flocculation effect. Some residue will collect at the bottom of the electrolysis chamber and eventually be discharged through the sewage outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0026] Figure 1 A schematic diagram of the internal structure of the electrolytic flocculation device provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of the electrolytic flocculation device provided in an embodiment of the present application;

[0028] Figure 3 A side view of the electrolytic flocculation device provided in an embodiment of the present application;

[0029] Figure 4This is a process flow chart of the wastewater purification system provided in an embodiment of the present application.

[0030] In the figure: 1- flocculation device; 101- electrolytic box; 102- partition; 103- electrolytic chamber; 104- electrode plate; 105- guide plate; 106- flow channel; 107- inclined plate; 108- sewage outlet; 109- liquid inlet tank; 110- liquid inlet pipe; 111- overflow pipe; 112- first regulating plate; 113- overflow tank; 114- second regulating plate; 115- liquid outlet tank; 116- liquid outlet hole; 117- liquid outlet pipe;

[0031] 2-intermediate water tank; 3-filter press; 4-circulating water tank; 5-wastewater pump; 6-reflux valve; 7-liquid inlet valve; 8-sewage discharge solenoid valve; 9-return water solenoid valve; 10-mixing solenoid valve; 11-liquid level sensor; 12-slag discharge solenoid valve; 13-slag trough; 14-feed pump; 15-wastewater valve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper," "lower," "front," and "back" are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0035] like Figure 1As shown, in this embodiment, an electrolytic flocculation device is provided, which includes an electrolytic box 101. A plurality of partitions 102 are provided inside the electrolytic box 101. The partitions 102 divide the interior of the electrolytic box 101 into a plurality of parallel electrolytic chambers 103. The plurality of electrolytic chambers 103 are connected in sequence, and an electrode plate 104 is provided inside any electrolytic chamber 103. Since the plurality of electrolytic chambers 103 are connected in sequence, after the wastewater is introduced into the electrolytic chamber 103 at the head end, it will flow into each subsequent electrolytic chamber 103 in sequence, and finally flow into the electrolytic chamber 103 at the end. The electrode plate 104 includes an anode and a cathode. After direct current is passed through the electrode plate 104, the anode loses electrons to form metal cations AL 3 +, through a series of hydrolysis, polymerization and oxidation processes, highly active adsorption flocculation groups are formed with extremely strong adsorption capacity, causing colloidal impurities and suspended impurities in the water to condense and precipitate. At the same time, the charged pollutant particles migrate in the electric field, and their partial charge is neutralized by the electrodes, causing them to destabilize and precipitate.

[0036] Under the action of the DC electric field, various pollutants in the wastewater directly lose electrons at the anode of the electrode plate 104 and undergo oxidation reactions. At the same time, anions with lower electrode potential in the solution, such as OH- and Cl-, lose electrons on the anode surface to generate new, stronger oxidant active substances. These active substances oxidize and decompose BOD5 (biological oxygen demand), COD (chemical oxygen demand), etc. in the water.

[0037] At the same time, water molecules are ionized to produce H- and OH-, which migrate in a direction driven by the electric field and precipitate hydrogen and oxygen on the surface of the cathode plate and anode plate respectively. The diameter of the newly generated bubbles is very small, and the dispersion of the bubbles is high. They act as carriers to adhere to the suspended solids in the water and float up, thereby removing the pollutant particles.

[0038] Specifically, the electrode plate 104 includes an anode plate provided on the partition 102 and a cathode plate provided on the guide plate 105, or the electrode plate 104 includes a cathode plate provided on the partition 102 and an anode plate provided on the guide plate 105, and the electrode plate 104 is connected to an external DC power supply. The anode plate and the cathode plate are located on opposite end surfaces of the partition 102 and the guide plate 105, and the electrode plate 104 is located in the electrolysis chamber 103 where the non-flow channel 106 is located. For details, please refer to Figure 1 .

[0039] In addition, a guide plate 105 is provided on one side of the electrolysis chamber 103 near the partition 102. Figure 1The guide plate 105 is spaced apart from the partition 102, thereby forming a flow channel 106 that guides the liquid toward the bottom of the electrolysis chamber 103. The top of the partition 102 is lower than the top of the guide plate 105. When the liquid gradually increases on one side of the partition 102, after reaching a certain level, the liquid overflows through the top of the partition 102 into the flow channel 106 and eventually drains to the bottom of the electrolysis chamber.

[0040] After the wastewater is flocculated by the electrode plates 104, the paint residue gradually settles at the bottom of the electrolysis chamber 103 and can be discharged through the sewage outlet 108 at the bottom of the electrolysis chamber 103. Compared with the treatment process that adds flocculating agents, this application does not require the addition of additional agents. Only the electrode plates 104 (aluminum plates) inside the electrolysis chamber 103 need to be replaced regularly. If the electrode plates 104 are stainless steel plates, replacement is not required.

[0041] In summary of the above embodiments, the present application achieves the same flocculation effect as traditional polymer flocculants through the principle of electrolytic flocculation, and because no flocculants are used, the amount of paint residue produced is also less than that of the existing technology. At the same time, the amount of ion release during the electrolytic flocculation process can be adjusted according to the characteristics of the wastewater to ensure the stability of the ion concentration in the water body that plays a flocculating role. In addition, the present application provides a more sufficient flocculation effect by having a multi-stage electrolysis chamber 103 inside the electrolysis box 101, so that the residue in the circulating water is separated from the water more thoroughly. The liquid enters the bottom of the electrolysis chamber 103 through the flow channel 106 in an overflow manner. The liquid flows from bottom to top in the electrolysis chamber 103, which can effectively avoid the impact of water flow on the flocculation effect, thereby achieving a more stable flocculation effect. Some residue will gather at the bottom of the electrolysis chamber 103 and eventually be discharged from the sewage outlet 108.

[0042] Please refer to Figure 1 The partition 102 at the bottom of the electrolysis chamber 103 is arranged in a V shape, and at the same time, an inclined plate 107 matching the V-shaped structure of the partition 102 is provided at the bottom of the guide plate 105. The inclined plate 107 is spaced apart from the bottom of the electrolysis chamber 103 so that the liquid flows into the electrolysis chamber 103 from the flow channel 106, thereby maintaining the flow velocity of the liquid in the flow channel 106 without significant changes, and effectively reducing the impact of the liquid on the bottom of the electrolysis chamber 103 when it reaches the bottom of the electrolysis chamber 103 from the flow channel 106.

[0043] In addition, since the electrolytic flocculation effect is achieved in the electrolysis chamber 103, the anode plate and cathode plate of this embodiment are located on the opposite end surfaces of the partition 102 and the guide plate 105, and the electrode plate 104 is located in the electrolysis chamber 103 where the non-flow channel 106 is located.

[0044] The above points out that multiple electrolysis chambers 103 can be connected in sequence. In some embodiments, adjacent electrolysis chambers 103 are connected through the flow channel 106, and the flow channel 106 of the electrolysis chamber 103 at the head end needs to be used to introduce wastewater. Therefore, a liquid inlet tank 109 is provided on the outside of the electrolysis chamber 103 at the head end. The liquid inlet tank 109 is arranged close to the flow channel 106, and the liquid in the liquid inlet tank 109 can overflow into the flow channel 106 through the top of the partition 102.

[0045] On this basis, the liquid inlet tank 109 can be connected to the liquid inlet pipe 110 to inject liquid into the liquid inlet tank 109. Figure 1 and Figure 2 A baffle covering part of the flow channel 106 and the liquid inlet tank 109 is provided at the top of the partition 102. The baffle is generally a square plate. The first side of the baffle abuts against the guide plate 105, and the second and third sides of the baffle abut against the wall of the electrolytic box 101. The fourth side of the baffle is provided with a first regulating plate 112 for regulating the overflow water level, and the first regulating plate 112 extends away from the flow channel 106 or the liquid inlet tank 109, so that the baffle, the guide plate 105, the wall of the electrolytic box 101, the first regulating plate 112 12 The four enclosed together form an overflow chamber 113; at the same time, the height of the first regulating plate 112 is adjustable, that is, the height of the first regulating plate 112 determines the water level entering the overflow chamber 113. When the liquid level in the electrolytic box 101 is too high, if liquid is continued to be injected into it, it will cause excessive water pressure inward, which poses a certain safety hazard. Therefore, this application adds an overflow chamber. When the water level exceeds the top of the first regulating plate 112, it can overflow into the overflow chamber. The overflow chamber 113 is externally connected to the overflow pipe 111. Please refer to Figure 2 and Figure 3 , thereby discharging it out of the electrolytic box 101 to avoid excessive water pressure in the electrolytic box 101.

[0046] Please refer to Figure 2 The liquid outlet compartment 115 can be distributed around the side of the electrolytic tank 101, and a second regulating plate 114 for adjusting the overflow water level is provided within the liquid outlet compartment 115. The second regulating plate 114 divides the liquid outlet compartment 115 into two compartments, one compartment corresponding to the liquid outlet hole 116, and the other compartment connected to the liquid outlet pipe 117. The second regulating plate 114 can adjust the outlet water level of the electrolytic tank 101. The top of the second regulating plate 114 is height-adjustable, so that only when the water level in the compartment corresponding to the liquid outlet hole 116 reaches a certain height can it overflow through the top of the second regulating plate 114 into the other compartment and be discharged from the electrolytic tank 101.

[0047] The first adjustment plate 112 and the second adjustment plate 114 can be composed of two superimposed plates, one of which is fixed and the other is movable, so that the height of the top of the first adjustment plate 112 and the second adjustment plate 114 can be adjusted by the movable plate, thereby changing the liquid level in the corresponding compartment.

[0048] The present application also provides a wastewater purification system, which includes a flocculation device 1, an intermediate water tank 2 and a filter press 3. The flocculation device 1 is the above-mentioned electrolytic flocculation device. The liquid inlet pipe 110 of the flocculation device 1 is connected to a circulating water pool 4. The circulating water pool 4 is used to pass wastewater into the electrolytic box 101 and complete electrolytic flocculation in the electrolytic box 101.

[0049] The intermediate water tank 2 serves as a transition component, and its inlet is connected to the liquid outlet pipe 117 of the flocculation device 1, and can receive the liquid discharged from the liquid outlet pipe 117; and the outlet of the intermediate water tank 2 is connected to the filter press 3, which can send the paint residue produced by the electrolytic flocculation device 1 into the automatic filter press 3 for filtration.

[0050] In addition to being connected to the intermediate water tank 2, the liquid inlet of the filter press 3 is also directly connected to the circulating water pool 4, which can directly filter the liquid in the circulating water pool 4 to improve the filtration effect of the system. At the same time, the liquid outlet of the filter press 3 is also connected to the circulating water pool 4, and the clean water after filtration can be returned to the circulating water pool 4 for easy recycling. The slag outlet produced after filtration can be sent out of the equipment through a conveyor and enter the slag tank 13. Compared with traditional filter press devices, this system can achieve a higher degree of automation, and compared with the paint residue produced by flocculants, the paint residue produced by electrolytic flocculation has lower viscosity and is not easy to clog the water pump, pipes and filter cloth of the filter press 3. Daily maintenance is simple and the workload of workers is small.

[0051] Further, please refer to Figure 4 A wastewater pump 5 and a liquid inlet valve 7 are provided on the pipeline connecting the liquid inlet pipe 110 of the flocculation device 1 of the system and the circulating water pool 4. The wastewater pump 5 is used to provide power for the wastewater to enter the liquid inlet tank 109, and the liquid inlet valve 7 is used to control the on-off and flow rate of the corresponding pipeline.

[0052] The sewage outlet 108 of the flocculation device 1 is externally connected to the liquid inlet of the filter press 3. A sewage discharge solenoid valve 8 is provided on the pipeline corresponding to the sewage outlet 108. After the electrolysis chamber 103 has been flocculating for a certain period of time, the sewage discharge solenoid valve 8 needs to be opened regularly and discharged into the filter press 3 through the corresponding pipeline to further filter the waste residue, thereby further improving the reuse rate of the circulating water.

[0053] In addition, the pipeline corresponding to the sewage outlet 108 can also be connected to the pipeline corresponding to the liquid inlet pipe 110, and a reflux valve 6 is set on the pipeline. Figure 4 , which can avoid excessive pressure in the pipeline corresponding to the sewage outlet 108, and can allow the liquid in the corresponding pipeline to enter the liquid inlet pipe 110 by opening the reflux valve 6.

[0054] The liquid outlet pipe 117 of the flocculation device 1 is also connected to the circulating water tank 4. A mixing solenoid valve 10 and a return solenoid valve 9 are provided on the pipelines connecting the liquid outlet pipe 117 to the intermediate water tank 2 and the circulating water tank 4, respectively. When the mixing solenoid valve 10 is opened, the flocculation device 1 can discharge water into the intermediate water tank 2; when the return solenoid valve 9 is opened, the flocculation device 1 can discharge water into the circulating water tank 4. Generally speaking, when the liquid level in the intermediate water tank 2 is too high and the flocculation device 1 is no longer required to discharge water into the intermediate water tank 2, the mixing solenoid valve 10 can be closed. At the same time, to prevent liquid from overflowing from the liquid outlet chamber 115 of the flocculation device 1 when the mixing solenoid valve 10 is closed, the return solenoid valve 9 can be opened to allow liquid to flow into the circulating water tank 4, maintaining the water level in the liquid outlet chamber 115 within a preset range.

[0055] A slag discharge solenoid valve 12 is provided on the pipeline corresponding to the outlet of the intermediate water tank 2. The intermediate water tank 2 can provide a water source for the filter press system. Since the liquid after electrolysis in the electrolysis device enters the intermediate water tank 2 by overflow, the liquid level in the intermediate water tank 2 needs to reach a certain height to meet the pumping demand of the feed pump 14. The feed pump 14 is arranged at the liquid inlet of the filter press 3. Through the action of the feed pump 14, the water in the intermediate water tank 2 is pumped into the filter press 3.

[0056] Please refer to Figure 4 A liquid level sensor 11 is provided in the intermediate water tank 2 for detecting the height of the liquid level therein. As the flocculation device 1 continues to drain water into the intermediate water tank 2, the water level in the intermediate water tank 2 will gradually increase. The preset liquid level sensor 11 can detect the low liquid level, medium liquid level and high liquid level in the intermediate water tank 2. If the liquid level in the intermediate water tank 2 is at a low liquid level, the water in the intermediate water tank 2 cannot meet the pumping demand of the feed pump 14. At this time, the slag discharge solenoid valve 12 is closed, and the intermediate water tank 2 continues to be filled with water. When the liquid level reaches the medium liquid level, the water in the intermediate water tank 2 can meet the pumping demand of the feed pump 14. The slag discharge solenoid valve 12 is opened to continuously pump water into the filter press 3. During the pumping process, if the liquid level in the intermediate water tank 2 reaches a low level again, pumping is stopped and the slag discharge solenoid valve 12 is closed. If the liquid level in the intermediate water tank 2 reaches a high level, it indicates that the feed pump 14 has not pumped the water out of the intermediate water tank 2 in time. In this case, it is necessary to close the mixing solenoid valve 10 and stop draining water to the intermediate water tank 2 to prevent the intermediate water tank 2 from overflowing due to excessive liquid level. Correspondingly, to prevent the liquid in the outlet chamber 115 of the flocculation device 1 from overflowing, the return water solenoid valve 9 can be opened to allow the liquid to flow into the circulating water tank 4.

[0057] In addition, the liquid inlet of the filter press 3 is directly connected to the circulating water pool 4, and a wastewater valve 15 is provided on the corresponding connected pipeline; when the intermediate water tank 2 cannot meet the pumping demand of the feed pump 14, the slag discharge solenoid valve 12 will be closed, but in order to ensure that the feed pump 14 and the filter press 3 can continue to operate, the wastewater valve 15 can be opened to allow the wastewater in the circulating water pool 4 to directly enter the filter press 3 for filtration.

[0058] This application can realize the long-term recycling of coating circulating water, ensure that the customer's reuse needs are met, and achieve the effect of no need to add chemicals, fully automatic operation and no need for human intervention; and according to actual needs, the flocculation device 1, the intermediate water tank 2, the filter press 3 and the supporting pipes and valves can be integrated into an integrated module structure, and all equipment controls can be integrated into a unified operation interface. Routine operators only need to install the screen display operation, and the installation is simple. Only the inlet and outlet pipes and the power casing need to be connected. No additional on-site construction is required. At the same time, it can be adjusted according to the characteristics of the sewage treatment to ensure that the overall equipment has the characteristics of strong pertinence, good treatment effect, energy saving and emission reduction.

[0059] In addition to being able to be used independently as a wastewater recycling device, the system can also be used as a pretreatment device for wastewater treatment processes. While removing SS (suspended solids) in sewage, it can also reduce COD by 30-50%. The SS of the circulating water treated by this system can be as low as below 20mg / l. While reducing the workload of subsequent wastewater purification equipment, it can also reduce the use of chemicals and the amount of solid waste generated, thereby reducing overall operating costs.

[0060] For waste gas treatment equipment using a spraying or water washing process, using the circulating water treated by this application as an absorbent or spray liquid can not only ensure its particulate matter purification effect for a long time, but also increase the purification efficiency of VOCs (volatile organic compounds) to a maximum of 50%. Moreover, since the circulating water treated by this application contains a large amount of hydroxyl free radicals, it can also effectively reduce the odor of the circulating water pool 4 and the surrounding environment, thereby improving the working environment.

[0061] In addition, the system can also be equipped with a secondary filtration system, an RO membrane (reverse osmosis membrane) filtration system, etc. The secondary filtration system can filter the electrolytic flocculation water through the filter tank again to further remove larger particles. The filter material can be yellow sand and activated carbon, etc.; the RO membrane filtration system can directly filter the wastewater through the RO membrane to remove most of the fine particles in the water body and minimize the SS value of the wastewater.

[0062] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0063] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core ideas of this application. It should be noted that for those skilled in the art, without departing from the principles of this application, various improvements and modifications can be made to this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. An electrolytic flocculation device, characterized in that: The invention comprises an electrolysis box (101), wherein a plurality of partitions (102) are provided in the electrolysis box (101), wherein the partitions (102) divide the interior of the electrolysis box (101) into a plurality of parallel electrolysis chambers (103), wherein the plurality of electrolysis chambers (103) are connected in sequence, and an electrode plate (104) is provided in any of the electrolysis chambers (103); A guide plate (105) is provided inside the electrolysis chamber (103) near one side of the partition (102), and a flow channel (106) is formed between the guide plate (105) and the partition (102) to guide the liquid toward the bottom of the electrolysis chamber (103). The top of the partition (102) is lower than the top of the guide plate (105), so that the liquid overflows from one side of the partition (102) through the top of the partition (102) into the flow channel (106). A sewage outlet (108) is provided at the bottom of the electrolysis chamber (103).

2. The electrolytic flocculation device according to claim 1, characterized in that: The partition (102) at the bottom of the electrolysis chamber (103) is arranged in a V shape, and an inclined plate (107) matching the V-shaped structure of the partition (102) is provided at the bottom of the guide plate (105). The inclined plate (107) is spaced apart from the bottom of the electrolysis chamber (103) so that liquid flows from the flow channel (106) into the electrolysis chamber (103).

3. The electrolytic flocculation device according to claim 1, characterized in that: The electrode plate (104) includes an anode plate provided on the separator (102) and a cathode plate provided on the guide plate (105), or includes a cathode plate provided on the separator (102) and an anode plate provided on the guide plate (105), and the electrode plate (104) is externally connected to a direct current; The anode plate and the cathode plate are located on opposite end surfaces of the separator (102) and the guide plate (105), and the electrode plate (104) is located in the electrolysis chamber (103) where the flow channel (106) is not located.

4. The electrolytic flocculation device according to claim 1, characterized in that: The adjacent electrolysis chambers (103) are connected through the flow channel (106). A liquid inlet chamber (109) is provided outside the electrolysis chamber (103) at the head end. The liquid inlet chamber (109) is arranged close to the flow channel (106). The liquid in the liquid inlet chamber (109) overflows into the flow channel (106) through the top of the partition (102).

5. The electrolytic flocculation device according to claim 4, characterized in that: The liquid inlet chamber (109) is externally connected to a liquid inlet pipe (110); a baffle covering a portion of the flow channel (106) and the liquid inlet chamber (109) is provided at the top of the partition (102); a first side of the baffle abuts against the guide plate (105); a second side and a third side of the baffle abut against the wall of the electrolytic box (101); a first regulating plate (112) for regulating an overflow water level is provided on the fourth side of the baffle; the baffle, the guide plate (105), the wall of the electrolytic box (101), and the first regulating plate (112) together form an overflow chamber (113); and the overflow chamber (113) is externally connected to an overflow pipe (111).

6. The electrolytic flocculation device according to claim 4, characterized in that: A liquid outlet (116) is provided on the partition (102) of the electrolysis chamber (103) at the end. The liquid outlet (116) is located on the partition (102) where the flow channel (106) is not located. The liquid outlet (116) is located on the top of the partition (102). A liquid outlet chamber (115) is provided outside the liquid outlet chamber (116). The liquid outlet chamber (115) is externally connected to a liquid outlet pipe (117).

7. The electroflocculation device according to claim 6, characterized in that: The liquid outlet chamber (115) is distributed around the electrolytic box (101), and a second regulating plate (114) for regulating the overflow water level is provided in the liquid outlet chamber (115). The second regulating plate (114) divides the liquid outlet chamber (115) into two compartments, one compartment corresponding to the liquid outlet hole (116), and the other compartment is provided with the liquid outlet pipe (117).

8. A wastewater purification system, characterized in that: include: The flocculation device (1) is the electrolytic flocculation device according to any one of claims 1 to 7, wherein the liquid inlet pipe of the flocculation device (1) leads to a circulating water pool (4), and the circulating water pool (4) is used to pass wastewater into the electrolytic box (101); an intermediate water tank (2), connected to the liquid outlet pipe (117) of the flocculation device (1), and used for receiving liquid discharged from the liquid outlet pipe (117); A filter press (3), wherein the liquid inlet of the filter press (3) is respectively connected to the outlet of the intermediate water tank (2) and the circulating water pool (4), the liquid outlet of the filter press (3) is connected to the circulating water pool (4), and the slag outlet of the filter press (3) is externally connected to the slag tank (13).

9. The wastewater purification system according to claim 8, characterized in that: A wastewater pump (5) and a liquid inlet valve (7) are provided on a pipeline connecting the liquid inlet pipe (110) of the flocculation device (1) and the circulating water pool (4); The sewage outlet (108) of the flocculation device (1) is externally connected to the liquid inlet of the filter press (3), and a sewage discharge solenoid valve (8) is provided on the pipeline corresponding to the sewage outlet (108); The liquid outlet pipe (117) is also connected to the circulating water pool (4), and a mixing solenoid valve (10) and a return water solenoid valve (9) are provided on the pipelines of the liquid outlet pipe (117) that are respectively connected to the intermediate water tank (2) and the circulating water pool (4); A slag discharge solenoid valve (12) is provided on the pipeline corresponding to the outlet of the intermediate water tank (2); A feed pump (14) is provided at the liquid inlet of the filter press (3), and a wastewater valve (15) is provided on the corresponding pipeline connecting the filter press (3) and the circulating water pool (4).

10. The wastewater purification system according to claim 8, characterized in that: A liquid level sensor (11) is provided in the intermediate water tank (2) for detecting the height of the liquid level therein.

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