Wastewater treatment system

Abstract

The utility model belongs to the technical field of non-ferrous metal smelting wastewater treatment, and particularly provides a wastewater treatment system which comprises a raw water tank, a first adjusting module, a second adjusting module and an electrolysis module, the raw water tank is used for bearing wastewater, and the raw water tank, the first adjusting module, the electrolysis module and the second adjusting module are sequentially communicated; the first adjusting module is used for reducing the pH value of the wastewater, the electrolysis module is used for decomposing organic matters in the wastewater, and the second adjusting module is used for increasing the pH value of the wastewater. By arranging the electrolysis module, organic matters in the wastewater can be decomposed, so that the COD (Chemical Oxygen Demand) concentration of the wastewater is reduced, and the recycling requirement is met; meanwhile, no sludge is generated after the wastewater is treated by the electrolysis module, so that the additional cost of wastewater treatment is greatly reduced, and the risk of secondary pollution is eliminated; meanwhile, the electrolysis module is high in integration level, low in treatment cost, small in occupied area and beneficial to popularization and application.

Description

Technical Field

[0001] The present application belongs to the technical field of non-ferrous metal smelting wastewater treatment, and specifically relates to a wastewater treatment system. Background Art

[0002] At present, various scale inhibitors, bactericides and corrosion inhibitors are added in the process of treating non-ferrous metal smelting wastewater to treat pollutants in the wastewater. Although these agents play an important role in treating pollutants in water bodies, they will form a large number of intermediates in the water body when used, and many macromolecular organic matter will remain in the wastewater, which will cause the chemical oxygen demand (COD) concentration of the wastewater to increase rapidly, resulting in the inability to reuse the treated wastewater. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present application is to provide a wastewater treatment system that can reduce the COD concentration of wastewater so that the wastewater meets the reuse requirements after treatment.

[0004] In order to solve the above problems, the present application provides a wastewater treatment system, including a raw water tank, a first regulating module, a second regulating module and an electrolysis module, the raw water tank is used to carry wastewater, the raw water tank, the first regulating module, the electrolysis module and the second regulating module are connected in sequence, the first regulating module is used to lower the pH value of the wastewater, the electrolysis module is used to decompose organic matter in the wastewater, and the second regulating module is used to increase the pH value of the wastewater.

[0005] Optionally, the first regulating module includes a first reagent tank and a first regulating pool, the first regulating pool is arranged between the raw water tank and the electrolysis module and is connected to the raw water tank and the electrolysis module respectively, the first regulating pool is also connected to the first reagent tank, and the first reagent tank is used to inject an acidic reagent into the first regulating pool.

[0006] Optionally, the electrolysis module comprises at least four electrolytic cells arranged in series, a shaped carbon electrode is arranged in the electrolytic cell, and two shaped carbon conductive rods are arranged opposite to each other on the outer peripheral wall of the shaped carbon electrode.

[0007] Optionally, the second regulating module includes a second reagent tank and a second regulating pool, the second regulating pool is arranged on the downstream side of the electrolysis module along the flow direction, the second regulating pool is connected to the electrolysis module, and the second regulating pool is also connected to the second reagent tank, and the second reagent tank is used to inject alkaline reagent into the second regulating pool.

[0008] Optionally, an aeration device is provided in the first regulating tank, the second regulating tank and the electrolytic cell;

[0009] Wherein, at least two aeration devices are arranged in the electrolytic cell.

[0010] Optionally, the wastewater treatment system further includes a transition tank, which is disposed on the downstream side of the second regulating module along the flow direction, the transition tank is connected to the second regulating module, and is used to allow the wastewater to stand to precipitate inorganic matter in the wastewater.

[0011] Optionally, the wastewater treatment system further includes a filtering device, which is disposed on a downstream side of the transition tank along a flow direction, and the filtering device is communicated with the transition tank.

[0012] Optionally, the wastewater treatment system further includes a first liquid level gauge, a second liquid level gauge and a third liquid level gauge, wherein the first liquid level gauge is arranged in the raw water tank, the second liquid level gauge is arranged in the second regulating tank, and the third liquid level gauge is arranged in the transition tank.

[0013] Optionally, the wastewater treatment system also includes a first pH detector, a second pH detector and a third pH detector, the first pH detector is arranged in the raw water tank, the second pH detector is arranged in the first regulating tank, and the third pH detector is arranged in the second regulating tank.

[0014] Optionally, the wastewater treatment system further includes a control module, which is electrically connected to the first liquid level meter, the second liquid level meter, the third liquid level meter, the first pH detector, the second pH detector and the third pH detector.

[0015] Beneficial Effects

[0016] The wastewater treatment system provided in the embodiment of the utility model can decompose organic matter in the wastewater by setting an electrolysis module to reduce the COD concentration of the wastewater, thereby meeting the reuse requirements; at the same time, no sludge is generated after the wastewater is treated by the electrolysis module, which greatly reduces the additional cost of wastewater treatment and eliminates the risk of secondary pollution; at the same time, the electrolysis module has high integration, low treatment cost and small footprint, which is conducive to promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a wastewater treatment system according to an embodiment of the present application;

[0018] Figure 2 Schematic diagram of the structure of the control module of the embodiment of the present application.

[0019] The reference numerals are:

[0020] 1. Raw water tank; 2. First reagent tank; 3. First regulating tank; 4. Electrolytic cell; 5. Second reagent tank; 6. Second regulating tank; 7. Transition tank; 8. Filter device; 9. Aeration device; 10. First liquid level gauge; 11. Second liquid level gauge; 12. Third liquid level gauge; 13. First pH detector; 14. Second pH detector; 15. Third pH detector; 16. Power supply; 17. Controller; 18. Display screen. DETAILED DESCRIPTION

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] See also Figure 1As shown, according to an embodiment of the present application, a wastewater treatment system is provided, including a raw water tank 1, a first regulating module, a second regulating module and an electrolysis module, the raw water tank 1 is used to carry wastewater, the raw water tank 1, the first regulating module, the electrolysis module and the second regulating module are connected in sequence, the first regulating module is used to lower the pH value of the wastewater, the electrolysis module is used to decompose organic matter in the wastewater, and the second regulating module is used to increase the pH value of the wastewater.

[0026] The wastewater treatment system provided in the embodiment of the utility model can decompose organic matter in the wastewater by setting an electrolysis module to reduce the COD concentration of the wastewater, thereby meeting the reuse requirements; at the same time, no sludge is generated after the wastewater is treated by the electrolysis module, which greatly reduces the additional cost of wastewater treatment and eliminates the risk of secondary pollution; at the same time, the electrolysis module has high integration, low treatment cost and small footprint, which is conducive to promotion and use.

[0027] The raw water tank 1 may be a rectangular water tank or a cylindrical water tank, etc. The raw water tank 1 is used to store wastewater.

[0028] The raw water tank 1 is connected to the electrolysis module, and the electrolysis module is used to decompose organic matter in the wastewater flowing through.

[0029] Specifically, the electrolysis module has an anode. After the electrolysis module is powered on, when the wastewater flows through the anode of the electrolysis module, the organic matter in the wastewater will undergo an oxidation reaction on the anode and be converted into harmless substances such as carbon dioxide and water, thereby achieving the purpose of reducing the COD concentration in the wastewater.

[0030] Among them, a first regulating module is arranged on the upstream side of the electrolysis module along the flow direction, the inlet of the first regulating module is connected with the outlet of the raw water tank 1, and the outlet of the first regulating module is connected with the electrolysis module. In the embodiment of the present application, the wastewater in the raw water tank 1 first flows through the first regulating module and then enters the electrolysis module.

[0031] A raw water pump is provided on the connecting pipeline between the raw water tank 1 and the first regulating module, and the raw water pump is used to transport the waste water in the raw water tank 1 to the first regulating module.

[0032] Among them, the position of the outlet of the first regulating module is higher than the position of the inlet of the electrolysis module, so that the wastewater can flow from the first regulating module into the electrolysis module by its own weight. In the embodiment of the present application, the outlet of the first regulating module is located at the top of the first regulating module, and the inlet of the electrolysis module is located at the bottom of the electrolysis module. The height difference between the outlet of the first regulating module and the inlet of the electrolysis module is 1.5-2m.

[0033] Specifically, the first regulating module is used to reduce the pH value of the wastewater so that the wastewater entering the electrolysis module is acidic wastewater. It should be noted that the electrolysis module is more effective in decomposing organic matter in acidic wastewater than in decomposing organic matter in alkaline wastewater and neutral wastewater. In the present application, by setting a first regulating module for reducing the pH value of the wastewater between the raw water tank 1 and the electrolysis module, the effect of the electrolysis module in treating high-concentration COD can be improved, and it can be ensured that the wastewater can meet the reuse requirements after treatment.

[0034] Among them, a second regulating module is arranged on the downstream side of the electrolysis module along the flow path direction, the inlet of the second regulating module is connected with the outlet of the electrolysis module, and the wastewater treated by the electrolysis module enters the second regulating module.

[0035] The electrolysis module also has a cathode. When the electrolysis module is powered on, when the wastewater flows through the cathode of the electrolysis module, the heavy metal ions in the wastewater will undergo a reduction reaction on the cathode and be converted into metal elements. In other words, the treated wastewater discharged from the electrolysis module has a low COD concentration but contains metal elements.

[0036] Among them, the position of the outlet of the electrolysis module is higher than the position of the inlet of the second regulating module, so that the wastewater can flow from the electrolysis module into the second regulating module by its own weight. In the embodiment of the present application, the outlet of the electrolysis module is located at the top of the electrolysis module, and the inlet of the second regulating module is located at the bottom of the second regulating module.

[0037] Specifically, the second regulating module is used to increase the pH value of the wastewater. After the wastewater discharged from the electrolysis module enters the second regulating module, the metal elements in the wastewater are easily converted into hydroxides and precipitated in an alkaline environment, thereby achieving the purpose of removing heavy metal ions in the wastewater, further improving the cleanliness of the wastewater after treatment, and ensuring that the wastewater can meet the reuse requirements after treatment.

[0038] In some possible embodiments provided by the present disclosure, the first regulating module includes a first reagent tank 2 and a first regulating tank 3. The first regulating tank 3 is arranged between the raw water tank 1 and the electrolysis module and is connected to the raw water tank 1 and the electrolysis module respectively. The first regulating tank 3 is also connected to the first reagent tank 2. The first reagent tank 2 is used to inject an acidic reagent into the first regulating tank 3.

[0039] An acidic agent is injected into the first regulating tank 3 through the first agent tank 2, so that the wastewater entering the electrolysis module is acidic wastewater, thereby improving the effect of the electrolysis module in decomposing organic matter in the wastewater and ensuring that the wastewater can meet the reuse requirements after treatment.

[0040] Among them, the first regulating tank 3 is a mixing tank for wastewater and acidic reagents.

[0041] Specifically, the first regulating tank 3 is arranged between the raw water tank 1 and the electrolysis module, the inlet of the first regulating tank 3 is connected with the outlet of the raw water tank 1, and the outlet of the first regulating tank 3 is connected with the inlet of the electrolysis module. In the embodiment of the present application, the wastewater in the raw water tank 1 first flows through the first regulating tank 3 and then enters the electrolysis module.

[0042] The first regulating tank 3 is also connected to the first reagent tank 2 , and the first reagent tank 2 stores an acidic reagent.

[0043] The acidic agent may be an acid, for example, sulfuric acid.

[0044] A first dosing pump is provided on the connecting pipeline between the first reagent tank 2 and the first regulating tank 3 , and the first dosing pump is used to transport the acidic reagent in the first reagent tank 2 to the first regulating tank 3 .

[0045] Specifically, multiple first reagent tanks 2 can be provided, for example, three first reagent tanks 2 are provided; four first reagent tanks 2 are provided; five first reagent tanks 2 are provided, etc. In the embodiment of the present application, three first reagent tanks 2 are provided, and the outlet pipelines of the three first reagent tanks 2 are provided in parallel, so that the three first reagent tanks 2 can simultaneously inject acidic reagents into the first regulating tank 3, so that the pH value of the wastewater entering the electrolysis module meets the user's needs.

[0046] The pH value of the acidic wastewater generated after the wastewater and the acidic agent are mixed in the first regulating tank 3 is 2.8-3.2.

[0047] The inlet pipeline of the first medicine tank 2 is provided with a flow meter and a solenoid valve.

[0048] In some possible embodiments provided by the present disclosure, the electrolysis module includes at least four electrolytic cells 4 arranged in series, a shaped carbon electrode is arranged in the electrolytic cell 4, and two shaped carbon conductive rods are relatively arranged on the outer peripheral wall of the shaped carbon electrode.

[0049] Among them, four, five or six electrolytic cells 4 can be set, and the present application does not make further limitations. In the embodiment of the present application, four electrolytic cells 4 are set. By setting four electrolytic cells 4, the residence time of wastewater in the electrolytic module can be extended, so that the organic matter in the wastewater can be fully decomposed in the electrolytic module.

[0050] Specifically, the four electrolytic cells 4 include a first electrolytic cell 4, a second electrolytic cell 4, a third electrolytic cell 4 and a fourth electrolytic cell 4, and the first electrolytic cell 4, the second electrolytic cell 4, the third electrolytic cell 4 and the fourth electrolytic cell 4 are arranged in series, that is, the first electrolytic cell 4 is connected to the second electrolytic cell 4, the second electrolytic cell 4 is connected to the third electrolytic cell 4, and the third electrolytic cell 4 is connected to the fourth electrolytic cell 4. In the embodiment of the present application, when the wastewater enters the electrolysis module, it flows through the first electrolytic cell 4, the second electrolytic cell 4, the third electrolytic cell 4 and the fourth electrolytic cell 4 in sequence, so that the electrolysis module can electrolyze the wastewater four times, thereby improving the ability of the electrolysis module to decompose organic matter in the wastewater, and ensuring that the wastewater can meet the reuse requirements after treatment.

[0051] The inlet of the electrolysis module is arranged at the bottom of the first electrolysis tank 4 , and the outlet of the electrolysis module is arranged at the top of the fourth electrolysis tank 4 .

[0052] Among them, a formed carbon electrode is arranged in the electrolytic cell 4, and when the formed carbon electrode is energized, it can decompose organic matter in the wastewater to achieve the purpose of reducing the COD concentration in the wastewater. It should be noted that compared with iron electrodes and iron-carbon electrodes, formed carbon electrodes have stable processes, small slag production, long service life, and small footprint.

[0053] Specifically, the formed carbon electrode can be used in wastewater with a pH value of 2-12; the formed carbon electrode only conducts electricity but does not dissolve, so it does not produce solid waste itself; the formed carbon electrode is not a metal and does not have the problem of passivation caused by oxidation; when the pH value of the water inlet to the formed carbon electrode is greater than 2, the service life is longer; the formed carbon electrode is dominated by the conductive function, and even if adsorption occurs, it does not affect the electrolysis effect; the formed carbon electrode can treat high-difficulty wastewater by applying an external voltage through an external power supply 16.

[0054] Among them, a shaped carbon conductive rod is also provided in the electrolytic cell 4, and two shaped carbon conductive rods are provided, and the two shaped carbon conductive rods are relatively arranged on the shaped carbon electrode along the circumferential direction of the shaped carbon electrode. In the embodiment of the present application, the shaped carbon electrode is connected to the external power supply 16 through the shaped carbon conductive rod, so as to improve the wastewater treatment capacity.

[0055] The bottom of the electrolytic cell 4 is provided with a drain valve, which can discharge solid impurities accumulated in the electrolytic cell 4, thereby avoiding clogging of the electrolytic cell 4 and enabling the electrolytic module to operate stably for a long time.

[0056] In some possible embodiments provided by the present disclosure, the second regulating module includes a second reagent tank 5 and a second regulating pool 6. The second regulating pool 6 is arranged on the downstream side of the electrolysis module along the flow direction. The second regulating pool 6 is connected to the electrolysis module. The second regulating pool 6 is also connected to the second reagent tank 5. The second reagent tank 5 is used to inject alkaline reagent into the second regulating pool 6.

[0057] An alkaline agent is injected into the second regulating tank 6 through the second agent tank 5, so that after the wastewater enters the second regulating tank 6, the metal elements in the wastewater are converted into hydroxides and precipitated under an alkaline environment, thereby achieving the purpose of reducing heavy metal ions in the wastewater, further improving the cleanliness of the wastewater after treatment, and ensuring that the wastewater can meet the reuse requirements after treatment.

[0058] Among them, the second regulating tank 6 is a mixing tank for wastewater and alkaline reagents.

[0059] Specifically, the second regulating tank 6 is arranged on the downstream side of the electrolysis module along the flow direction, and the inlet of the second regulating tank 6 is connected to the outlet of the electrolysis module. In the embodiment of the present application, the wastewater in the raw water tank 1 first flows through the first regulating tank 3 and then enters the electrolysis module, and finally enters the second regulating tank 6.

[0060] The second regulating tank 6 is also connected to the second reagent tank 5 , and the second reagent tank 5 stores an alkaline reagent.

[0061] The alkaline agent may be a base, for example, sodium hydroxide.

[0062] A second dosing pump is provided on the connecting pipeline between the second reagent tank 5 and the second regulating tank 6 , and the second dosing pump is used to transport the alkaline reagent in the second reagent tank 5 to the second regulating tank 6 .

[0063] Specifically, at least one second reagent tank 5 is provided, for example, one second reagent tank 5 is provided; two second reagent tanks 5 are provided; three second reagent tanks 5 are provided, etc. In the embodiment of the present application, one second reagent tank 5 is provided, so that the pH value of the wastewater in the second regulating tank 6 meets the user's needs while reducing the construction cost of the wastewater treatment system.

[0064] The pH value of the alkaline wastewater generated after the wastewater and the alkaline agent are mixed in the second regulating tank 6 is 10-11.

[0065] The inlet pipeline of the second medicine tank 5 is also provided with a flow meter and a solenoid valve.

[0066] In some possible embodiments provided by the present disclosure, aeration devices 9 are provided in the first regulating tank 3 , the second regulating tank 6 and the electrolytic cell 4 ; wherein at least two aeration devices 9 are provided in the electrolytic cell 4 .

[0067] The aeration device 9 may be a surface aeration device, a blast aeration device, or an underwater aeration device. In the embodiment of the present application, the aeration device 9 is an underwater aeration device.

[0068] Specifically, the first regulating tank 3, the second regulating tank 6 and the electrolytic tank 4 are all provided with an aeration device 9, and the aeration device 9 is arranged at the bottom of the first regulating tank 3 and the second regulating tank 6 and the bottom of the electrolytic tank 4. The aeration device 9 can generate bubbles, which continuously rise in the water bodies of the first regulating tank 3, the second regulating tank 6 and the electrolytic tank 4 to stir the water bodies, speed up the wastewater treatment speed, and thus improve the wastewater treatment quality.

[0069] Among them, in the embodiment of the present application, eight aeration devices 9 are arranged in the electrolysis module, and two aeration devices 9 are arranged in each electrolytic cell 4, which can further accelerate the wastewater treatment speed.

[0070] In some possible embodiments provided by the present disclosure, the wastewater treatment system also includes a transition tank 7, which is arranged on the downstream side of the second regulating module along the flow direction, and the transition tank 7 is connected to the second regulating module. The transition tank 7 is used to stand the wastewater to precipitate inorganic matter in the wastewater.

[0071] By setting up the transition tank 7, a static sedimentation place can be provided for the effluent of the second regulating module, so that the hydroxide in the wastewater can be precipitated in the transition tank 7, thereby achieving the purpose of removing heavy metal ions in the wastewater and ensuring that the wastewater can meet the reuse requirements after treatment.

[0072] The transition tank 7 is connected to the second regulating tank 6 , and the transition tank 7 is arranged at the downstream side of the second regulating tank 6 along the flow direction.

[0073] Among them, a water outlet pump is arranged on the connecting pipeline between the second regulating tank 6 and the transition tank 7 , and the water outlet pump is used to transport the alkaline wastewater in the second regulating tank 6 to the transition tank 7 .

[0074] In some possible embodiments provided by the present disclosure, the wastewater treatment system further includes a filtering device 8 , which is disposed on the downstream side of the transition tank 7 along the flow direction, and the filtering device 8 is connected to the transition tank 7 .

[0075] By providing the filtering device 8, residual organic matter and heavy metal impurities in the wastewater can be removed, and the wastewater can be decolorized.

[0076] The filter medium in the filter device 8 may be activated carbon, which can be reused, thereby reducing costs and improving the utilization rate of consumables.

[0077] Specifically, the filter device 8 is connected to the transition tank 7, and the filter device 8 is arranged on the downstream side of the transition tank 7 along the flow direction.

[0078] Among them, a transition pump is arranged between the transition tank 7 and the filter device 8, and the transition pump is used to transport the wastewater in the transition tank 7 to the filter device 8, and the activated carbon in the filter device 8 adsorbs the residual organic matter and heavy metal impurities in the wastewater, and adsorbs the pigments in the wastewater.

[0079] In the embodiment of the present application, the wastewater in the raw water tank 1 flows through the first regulating module, the electrolysis module, the second regulating module, the transition tank 7 and the filter device 8 in sequence. The water produced by the first regulating module is primary treated wastewater, the water produced by the electrolysis module is secondary treated wastewater, the water produced by the second regulating module is tertiary treated wastewater, the water produced by the transition tank 7 is quaternary treated wastewater, and the water produced by the filter device 8 is recyclable water.

[0080] In some possible embodiments provided by the present disclosure, the wastewater treatment system also includes a first liquid level gauge 10, a second liquid level gauge 11 and a third liquid level gauge 12. The first liquid level gauge 10 is arranged in the raw water tank 1, the second liquid level gauge 11 is arranged in the second regulating tank 6, and the third liquid level gauge 12 is arranged in the transition tank 7.

[0081] The first liquid level gauge 10 , the second liquid level gauge 11 and the third liquid level gauge 12 may be automatic liquid level gauges or the like.

[0082] Specifically, the first liquid level meter 10 is arranged in the raw water tank 1 to monitor the liquid level height in the raw water tank 1; the second liquid level meter 11 is arranged in the second regulating tank 6 to detect the liquid level height in the second regulating tank 6; the third liquid level meter 12 is arranged in the transition tank 7 to monitor the liquid level height in the transition tank 7.

[0083] It is understandable that the first reagent tank 2, the second reagent tank 5 and the first regulating tank 3 may also be provided with automatic liquid level meters, which can be selected according to actual conditions, and this application does not make further limitations.

[0084] In some possible embodiments provided by the present disclosure, the wastewater treatment system also includes a first pH detector 13, a second pH detector 14 and a third pH detector 15. The first pH detector 13 is arranged in the raw water tank 1, the second pH detector 14 is arranged in the first regulating tank 3, and the third pH detector 15 is arranged in the second regulating tank 6.

[0085] The first pH detector 13 , the second pH detector 14 and the third pH detector 15 may be online pH detectors or the like.

[0086] Specifically, the first pH detector 13 is disposed in the raw water tank 1 to detect the initial pH value of the wastewater; the second pH detector 14 is disposed in the first regulating tank 3 to detect the pH value of the wastewater after mixing with the acidic agent;

[0087] The third pH detector 15 is disposed in the second regulating tank 6 and is used to detect the pH value of the wastewater after mixing with the alkaline agent.

[0088] In some possible implementations provided by the present disclosure, see Figure 2As shown, the wastewater treatment system further includes a control module, which is electrically connected to the first liquid level meter 10 , the second liquid level meter 11 , the third liquid level meter 12 , the first pH detector 13 , the second pH detector 14 and the third pH detector 15 .

[0089] The control module includes a power supply 16, a controller 17 and a display screen 18. The power supply 16 may be a battery, etc., the display screen 18 may be a touch screen, etc., and the controller 17 may be a PLC, etc.

[0090] The power supply 16 is electrically connected to the controller 17 and the display screen 18 , and the power supply 16 is used to provide electrical energy to the controller 17 and the display screen 18 .

[0091] The display screen 18 is also electrically connected to the electrolysis module, and the voltage and current of the formed carbon electrode in the electrolysis module can be remotely controlled through the display screen 18.

[0092] The controller 17 is also electrically connected to the first liquid level meter 10, the second liquid level meter 11, the first pH detector 13, the second pH detector 14, the third pH detector 15, the raw water pump, the first dosing pump, the second dosing pump, the outlet pump and the transition pump. The controller 17 can collect the operation data of the wastewater treatment system and transmit it to the display screen 18, which is convenient for monitoring the wastewater treatment system and also convenient for regulating the wastewater treatment system. In addition, the controller 17 can also automatically control the water intake of the raw water tank 1 according to the monitoring data of the first liquid level meter 10; the controller 17 can also automatically control the start and stop of the water outlet pump according to the monitoring data of the second liquid level meter 11. When the second liquid level meter 11 monitors that the liquid level height in the second regulating tank 6 is greater than 1m, the controller 17 controls the water outlet pump to start and pump the wastewater in the second regulating tank 6 into the transition tank 7; the controller 17 can also automatically control the start and stop of the transition pump according to the monitoring data of the third liquid level meter 12. When the third liquid level meter 12 monitors that the liquid level height in the transition tank 7 is greater than 1m, the controller 17 controls the transition pump to start and pump the wastewater in the transition tank 7 into the filtering device 8; the controller 17 can also automatically adjust the working state of the first dosing pump according to the detection data of the second pH detector 14 to control the dosing amount of the first regulating tank 3; the controller 17 can also automatically adjust the working state of the second dosing pump according to the detection data of the third pH detector 15 to control the dosing amount of the second regulating tank 6.

[0093] The wastewater treatment system provided in the embodiment of the utility model can decompose organic matter in the wastewater by setting an electrolysis module to reduce the COD concentration of the wastewater, thereby meeting the reuse requirements; at the same time, no sludge is generated after the wastewater is treated by the electrolysis module, which greatly reduces the additional cost of wastewater treatment and eliminates the risk of secondary pollution; at the same time, the electrolysis module has high integration, low treatment cost and small footprint, which is conducive to promotion and use.

[0094] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0095] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A wastewater treatment system, It is characterized in that The invention comprises a raw water tank (1), a first regulating module, a second regulating module and an electrolysis module, wherein the raw water tank (1) is used to carry wastewater, the raw water tank (1), the first regulating module, the electrolysis module and the second regulating module are connected in sequence, the first regulating module is used to reduce the pH value of the wastewater, the electrolysis module is used to decompose organic matter in the wastewater, and the second regulating module is used to increase the pH value of the wastewater; Wherein, under the action of the second regulating module, the wastewater becomes alkaline, so that the metal ions in the wastewater are converted into hydroxides and precipitated.

2. The wastewater treatment system according to claim 1, It is characterized in that The first regulating module comprises a first reagent tank (2) and a first regulating pool (3); the first regulating pool (3) is arranged between the raw water tank (1) and the electrolysis module and is connected to the raw water tank (1) and the electrolysis module respectively; the first regulating pool (3) is also connected to the first reagent tank (2); the first reagent tank (2) is used to inject an acidic reagent into the first regulating pool (3).

3. The wastewater treatment system according to claim 2, It is characterized in that The electrolysis module comprises at least four electrolytic cells (4) arranged in series, wherein a shaped carbon electrode is arranged in the electrolytic cell (4), and two shaped carbon conductive rods are arranged opposite to each other on the outer peripheral wall of the shaped carbon electrode.

4. The wastewater treatment system according to claim 3, It is characterized in that The second regulating module comprises a second reagent tank (5) and a second regulating pool (6); the second regulating pool (6) is arranged on the downstream side of the electrolysis module along the flow path direction; the second regulating pool (6) is connected to the electrolysis module; the second regulating pool (6) is also connected to the second reagent tank (5); the second reagent tank (5) is used to inject alkaline reagent into the second regulating pool (6).

5. The wastewater treatment system according to claim 4, It is characterized in that The first regulating tank (3), the second regulating tank (6) and the electrolytic cell (4) are all provided with an aeration device (9); Wherein, at least two aeration devices (9) are arranged in the electrolytic cell (4).

6. The wastewater treatment system according to claim 4, It is characterized in that The wastewater treatment system further comprises a transition tank (7), which is arranged on the downstream side of the second regulating module along the flow path direction, the transition tank (7) is connected to the second regulating module, and the transition tank (7) is used to allow the wastewater to stand still so as to precipitate inorganic substances in the wastewater.

7. The wastewater treatment system according to claim 6, It is characterized in that The wastewater treatment system further comprises a filtering device (8), wherein the filtering device (8) is arranged on the downstream side of the transition tank (7) along the flow path direction, and the filtering device (8) is connected to the transition tank (7).

8. The wastewater treatment system according to claim 6, It is characterized in that The wastewater treatment system further comprises a first liquid level gauge (10), a second liquid level gauge (11) and a third liquid level gauge (12); the first liquid level gauge (10) is arranged in the raw water tank (1), the second liquid level gauge (11) is arranged in the second regulating tank (6), and the third liquid level gauge (12) is arranged in the transition tank (7).

9. The wastewater treatment system according to claim 8, It is characterized in that The wastewater treatment system further comprises a first pH detector (13), a second pH detector (14) and a third pH detector (15); the first pH detector (13) is arranged in the raw water tank (1), the second pH detector (14) is arranged in the first regulating tank (3), and the third pH detector (15) is arranged in the second regulating tank (6).

10. The wastewater treatment system according to claim 9, It is characterized in that The wastewater treatment system further comprises a control module, wherein the control module is electrically connected to the first liquid level meter (10), the second liquid level meter (11), the third liquid level meter (12), the first pH detector (13), the second pH detector (14) and the third pH detector (15).

Images