TOPCON battery low-alkali wastewater treatment system

Abstract

The utility model discloses a TOPCON battery low-alkali wastewater treatment system. The system comprises a low-alkali wastewater collection pool; a comprehensive adjusting tank; a physicochemical primary treatment module; the physicochemical primary PH regulating tank is connected with the comprehensive regulating tank; a physicochemical secondary treatment module, wherein a physicochemical secondary PH regulating tank is respectively connected with a physicochemical primary sedimentation tank and a low-alkali wastewater collecting tank; a neutralization callback pool; an up-to-standard discharge pool; the sulfuric acid storage tank is respectively connected with the physicochemical first-stage and second-stage PH regulating tanks and the comprehensive regulating tank; the lime milk agent storage tank and the calcium chloride agent storage tank are respectively connected with the physicochemical first-stage PH regulating tank and the physicochemical second-stage PH regulating tank; the polyaluminum chloride medicament storage tank and the polyacrylamide medicament preparation tank are respectively connected with the physicochemical first-stage coagulation tank and the physicochemical second-stage coagulation tank; the detection assembly is used for detecting the PH value and the fluorine ion concentration; and the controller is connected with the detection assembly, the adding pump and the water inlet pump. The system is low in cost and high in automation degree, and dependence on chemical agents and influence on the environment can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to a TOPCON battery low-alkali wastewater treatment system. Background Art

[0002] During the preparation process, TOPCON cells need to be processed or cleaned in concentrated acid tanks, clean water tanks, concentrated alkali tanks, and clean water tanks in sequence. After the preparation is completed, the wastewater in each tank is discharged to the corresponding concentrated acid collection tank, dilute acid collection tank, concentrated alkali collection tank, or low alkali collection tank through their own pipelines. Then, each wastewater is lifted to the fluoride collection tank, low alkali collection tank, or concentrated alkali collection tank of the wastewater station by a lifting pump, and then mixed and treated by the wastewater treatment system of the wastewater station until the fluoride ion concentration is less than 8 mg / L and the pH range is 6 to 9, and then discharged to the downstream sewage treatment plant through the sewage pipe network.

[0003] At present, the conventional treatment process is to lift concentrated acid, concentrated alkali, dilute acid, and low alkali to the comprehensive regulating tank, mix them evenly, adjust the pH value to the preset range, and then treat the fluoride ion concentration in the wastewater to below 8 mg / L and the pH to 6-9 through the primary physicochemical system and the secondary physicochemical system. However, from the analysis of the production process, low-alkali wastewater is mainly produced by further cleaning of TOPCON battery cells after passing through the concentrated alkali tank, and low-alkali wastewater does not contain fluoride ions. Through long-term continuous experimental detection, it is further confirmed that there is no fluoride ion in low-alkali wastewater. Therefore, mixing low-alkali wastewater with other wastewater and then performing primary and secondary defluorination treatment through the primary and secondary physicochemical systems will lead to increased consumption of defluorination agents, increased sludge production, and increased electricity consumption, resulting in higher operating costs. Utility Model Content

[0004] The purpose of the utility model is to provide a TOPCON battery low-alkali wastewater treatment system to solve the problem in the prior art that low-alkali wastewater is mixed with other wastewaters and then subjected to primary and secondary defluorination treatments, which will lead to increased corresponding agent consumption, increased sludge production, and increased power consumption, thereby leading to higher operating costs.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A TOPCON battery low-alkali wastewater treatment system, comprising:

[0007] A low-alkali wastewater collection pool, used to collect low-alkali wastewater;

[0008] A comprehensive regulating tank, used for collecting fluorine-containing wastewater, wherein the comprehensive regulating tank is connected to the low-alkali wastewater collection tank through a first water inlet pump;

[0009] The physicochemical primary treatment module comprises a physicochemical primary pH regulating tank, a physicochemical primary reaction tank, a physicochemical primary coagulation tank, a physicochemical primary flocculation tank and a physicochemical primary sedimentation tank which are connected by gravity in sequence from front to back, and the physicochemical primary pH regulating tank is connected to the comprehensive regulating tank through a second water inlet pump;

[0010] The physicochemical secondary treatment module comprises a physicochemical secondary pH regulating tank, a physicochemical secondary reaction tank, a physicochemical secondary coagulation tank, a physicochemical secondary flocculation tank and a physicochemical secondary sedimentation tank which are connected by gravity from front to back in sequence, wherein the physicochemical secondary pH regulating tank is connected by gravity with the physicochemical primary sedimentation tank, and is connected with the low-alkali wastewater collection tank through a third water inlet pump;

[0011] A neutralization callback tank, connected to the physicochemical secondary sedimentation tank by gravity;

[0012] A standard discharge pool connected to the neutralization callback pool by gravity;

[0013] A sulfuric acid storage tank is connected to the comprehensive regulating tank through a first dosing pump, connected to the physical and chemical primary pH regulating tank through a second dosing pump, and connected to the physical and chemical secondary pH regulating tank through a third dosing pump;

[0014] A lime milk reagent storage tank is connected to the physical and chemical primary pH regulating tank through a fourth dosing pump, and is connected to the physical and chemical secondary pH regulating tank through a fifth dosing pump;

[0015] A calcium chloride agent storage tank is connected to the physical and chemical primary pH regulating tank through a sixth dosing pump, and is connected to the physical and chemical secondary pH regulating tank through a seventh dosing pump;

[0016] The polyaluminium chloride agent storage tank is connected to the physicochemical primary coagulation tank through an eighth dosing pump, and is connected to the physicochemical secondary coagulation tank through a ninth dosing pump;

[0017] A polyacrylamide reagent preparation tank is connected to the physicochemical primary coagulation tank through a tenth dosing pump, and is connected to the physicochemical secondary coagulation tank through an eleventh dosing pump;

[0018] The detection component includes a pH detection unit and a fluoride ion concentration detection unit, wherein the pH detection unit is used to respectively detect the pH values ​​in the physicochemical primary pH adjustment tank, the physicochemical secondary pH adjustment tank, and the standard discharge tank; the fluoride ion concentration detection unit is used to respectively detect the fluoride ion concentrations in the physicochemical primary reaction tank, the physicochemical secondary reaction tank, and the standard discharge tank;

[0019] A controller is respectively connected to the pH detection unit, the fluoride ion concentration detection unit, the first dosing pump, the second dosing pump, the third dosing pump, the fourth dosing pump, the fifth dosing pump, the sixth dosing pump, the seventh dosing pump, the eighth dosing pump, the ninth dosing pump, the tenth dosing pump, the eleventh dosing pump, the first water inlet pump, the second water inlet pump, and the third water inlet pump;

[0020] The controller controls the third water inlet pump, the first dosing pump, the second dosing pump, the third dosing pump, the fourth dosing pump, and the fifth dosing pump to start or stop according to the detection result of the pH detection unit; the controller controls the sixth dosing pump and the seventh dosing pump to start or stop according to the detection result of the fluoride ion concentration detection unit.

[0021] Furthermore, stirring devices are respectively provided in the comprehensive regulating tank, the physicochemical first-level pH regulating tank, the physicochemical first-level reaction tank, the physicochemical first-level coagulation tank, the physicochemical first-level flocculation tank, the physicochemical second-level pH regulating tank, the physicochemical second-level reaction tank, the physicochemical second-level coagulation tank, the physicochemical second-level flocculation tank, the lime milk agent storage tank, and the polyacrylamide agent configuration tank.

[0022] Furthermore, a sludge scraping device is provided in the physicochemical primary sedimentation tank and the physicochemical secondary sedimentation tank.

[0023] Furthermore, aeration devices are respectively provided at the bottom of the low-alkali wastewater collection tank, the neutralization callback tank, the standard discharge tank, the calcium chloride agent storage tank, and the polyaluminium chloride agent storage tank.

[0024] Furthermore, the physicochemical primary sedimentation tank and the physicochemical secondary sedimentation tank are respectively connected to an external sewage discharge pipeline through a sludge pump, and the sludge pump is connected to the controller signal.

[0025] Furthermore, the PH detection unit includes three PH detectors, and the three PH detectors are respectively arranged in the physicochemical primary PH adjustment tank, the physicochemical secondary PH adjustment tank, and the standard discharge tank.

[0026] Furthermore, the fluoride ion concentration detection unit includes three fluoride ion concentration detectors, and the three fluoride ion concentration detectors are respectively arranged in the physicochemical primary reaction tank, the physicochemical secondary reaction tank, and the standard discharge tank.

[0027] Furthermore, the surfaces of the low-alkali wastewater collection tank, the comprehensive regulating tank, the physicochemical first-level pH regulating tank, the physicochemical first-level reaction tank, the physicochemical first-level coagulation tank, the physicochemical first-level flocculation tank, the physicochemical first-level sedimentation tank, the physicochemical second-level pH regulating tank, the physicochemical second-level reaction tank, the physicochemical second-level coagulation tank, the physicochemical second-level flocculation tank, the physicochemical second-level sedimentation tank, the neutralization callback tank, the standard discharge tank, the lime milk agent storage tank, and the calcium chloride agent storage tank are provided with an anti-corrosion layer.

[0028] Furthermore, the low-alkali wastewater collection tank, the comprehensive regulating tank, the physicochemical first-level pH regulating tank, the physicochemical first-level reaction tank, the physicochemical first-level coagulation tank, the physicochemical first-level flocculation tank, the physicochemical first-level sedimentation tank, the physicochemical second-level pH regulating tank, the physicochemical second-level reaction tank, the physicochemical second-level coagulation tank, the physicochemical second-level flocculation tank, the physicochemical second-level sedimentation tank, the neutralization and callback tank, the standard discharge tank, the lime milk agent storage tank, and the calcium chloride agent storage tank are all steel concrete structures or are made of steel plates.

[0029] Furthermore, the anti-corrosion layer is an epoxy resin layer.

[0030] Due to the application of the above technical solution, the beneficial effects of the present application compared with the prior art are:

[0031] The present application provides a TOPCON battery low-alkali wastewater treatment system, which replaces the prior art method of directly mixing various wastewaters and then treating them by storing low-alkali wastewater and fluoride-containing wastewater separately, controlling the amount of low-alkali wastewater entering the comprehensive regulating tank through a first water inlet pump, and quantitatively mixing and then treating the mixed wastewater. This avoids the situation in which the pH value of the mixed wastewater is uncontrollable due to uncertain factors such as the pH value and water volume of low-alkali wastewater and fluoride-containing wastewater.

[0032] The present application is also provided with a sulfuric acid storage tank and a lime milk agent storage tank. The sulfuric acid storage tank is connected to the comprehensive regulating tank through a first dosing pump to add sulfuric acid, thereby adjusting the initial pH value in the comprehensive regulating tank. The lime milk agent storage tank is connected to the physical and chemical primary pH regulating tank through a fourth dosing pump to add lime, thereby adjusting the pH value in the physical and chemical primary pH regulating tank. Since the low-alkali wastewater and the fluorine-containing wastewater are stored separately and mixed in controlled amounts, the pH value of the mixed wastewater is close to the expected value, which can reduce the use of lime milk agents and sulfuric acid agents and reduce costs.

[0033] At the same time, the low-alkali wastewater collection pool and the physical and chemical secondary pH regulating pool are connected through the third water inlet pump. The method of transporting low-alkali wastewater to the physical and chemical secondary pH regulating pool to adjust the pH value replaces the original method of adding lime milk reagents, which can effectively reduce the use of lime milk reagents and further reduce the investment cost of chemical reagents. Moreover, the pH value is adjusted by acid-base neutralization of low-alkali wastewater and fluoride-containing wastewater, which simultaneously avoids the use of acid reagents required for treating low-alkali wastewater, reducing dependence on chemical reagents and the impact on the environment.

[0034] In addition, by setting up the coordination of detection components, controllers and pumps, the pH value and fluoride ion content in the pool can be automatically detected and the corresponding reagents can be automatically added. This real-time monitoring and automatic control mechanism can improve the stability and efficiency of the system, while reducing human intervention, making the wastewater treatment process more intelligent and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram shown in an embodiment of the utility model.

[0037] 1-low-alkali wastewater collection tank; 2-comprehensive regulating tank; 31-physical and chemical primary PH regulating tank; 32-physical and chemical primary reaction tank; 33-physical and chemical primary coagulation tank; 34-physical and chemical primary flocculation tank; 35-physical and chemical primary sedimentation tank; 41-physical and chemical secondary PH regulating tank; 42-physical and chemical secondary reaction tank; 43-physical and chemical secondary coagulation tank; 44-physical and chemical secondary flocculation tank; 45-physical and chemical secondary sedimentation tank; 5-neutralization callback tank; 6-standard discharge tank; 7-sulfuric acid storage tank; 8-lime milk agent storage tank; 9-calcium chloride agent storage tank; 10-polyaluminium chloride agent storage tank; 20-polyacrylamide Medicament preparation tank; 3001-first dosing pump; 3002-second dosing pump; 3003-third dosing pump; 3004-fourth dosing pump; 3005-fifth dosing pump; 3006-sixth dosing pump; 3007-seventh dosing pump; 3008-eighth dosing pump; 3009-ninth dosing pump; 3010-tenth dosing pump; 3011-eleventh dosing pump; 401 first water inlet pump; 402-second water inlet pump; 403 third water inlet pump; 50-PH detector; 60-fluoride ion concentration detector; 70-stirring device; 80-aeration device; 90-sludge scraping device. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0041] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0042] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] See also Figure 1 , an embodiment of the present application provides a TOPCON battery low-alkali wastewater treatment system including a low-alkali wastewater collection pool 1 for collecting low-alkali wastewater, a comprehensive regulating pool 2 for collecting fluorine-containing wastewater, a physical and chemical primary treatment module, a physical and chemical secondary treatment module, a neutralization callback pool 5, a standard discharge pool 6 connected to the neutralization callback pool 5 by gravity, a sulfuric acid storage tank 7, a lime milk agent storage pool 8, a calcium chloride agent storage pool 9, a polyaluminum chloride agent storage pool 10, a polyacrylamide agent configuration tank 20, a detection component and a controller (not shown). Among them, the comprehensive regulating pool is connected to the low-alkali wastewater collection pool through the first water inlet pump. It should be noted that the controller uses a single-chip microcomputer or a logic circuit to realize control and signal processing, which is a prior art and will not be repeated here. The wastewater collected in the comprehensive regulating pool 2 can be a mixed wastewater of various acidic and alkaline fluorine-containing wastewaters, which is not specifically limited here.

[0045] As described above, the physicochemical primary treatment module includes a physicochemical primary PH regulating tank 31, a physicochemical primary reaction tank 32, a physicochemical primary coagulation tank 33, a physicochemical primary flocculation tank 34 and a physicochemical primary sedimentation tank 35 which are connected by gravity from front to back in sequence. The physicochemical primary PH regulating tank 31 is connected to the comprehensive regulating tank 2 through the second water inlet pump 402.

[0046] The physicochemical secondary treatment module includes a physicochemical secondary PH regulating tank 41, a physicochemical secondary reaction tank 42, a physicochemical secondary coagulation tank 43, a physicochemical secondary flocculation tank 44 and a physicochemical secondary sedimentation tank 45, which are connected by gravity from front to back. The physicochemical secondary PH regulating tank 41 is connected by gravity with the physicochemical primary sedimentation tank 35, and is connected with the low-alkali wastewater collection tank 1 through the third water inlet pump 403. The neutralization callback tank 5 is connected by gravity with the physicochemical secondary sedimentation tank 45.

[0047] The sulfuric acid storage tank 7 is connected to the comprehensive regulating tank 2 through the first dosing pump 3001, is connected to the physical and chemical primary pH regulating tank 31 through the second dosing pump 3002, and is connected to the physical and chemical secondary pH regulating tank 41 through the third dosing pump 3003. The lime milk agent storage tank 8 is connected to the physical and chemical primary pH regulating tank 31 through the fourth dosing pump 3004, and is connected to the physical and chemical secondary pH regulating tank 41 through the fifth dosing pump 3005. The calcium chloride agent storage tank 9 is connected to the physical and chemical primary pH regulating tank 31 through the sixth dosing pump 3006, and is connected to the physical and chemical secondary pH regulating tank 41 through the seventh dosing pump 3007. The polyaluminum chloride agent storage tank 10 is connected to the physical and chemical primary coagulation tank 33 through the eighth dosing pump 3008, and is connected to the physical and chemical secondary coagulation tank 43 through the ninth dosing pump 3009. The polyacrylamide reagent configuration tank 20 is connected to the physical and chemical primary coagulation tank 33 through the tenth dosing pump 3010, and is connected to the physical and chemical secondary coagulation tank 43 through the eleventh dosing pump 3011. Sulfuric acid, lime milk reagent, calcium chloride reagent, polyaluminium chloride reagent and polyacrylamide reagent are all existing known chemical reagents, which will not be elaborated in detail here.

[0048] The detection component includes a pH detection unit and a fluoride ion concentration detection unit. The pH detection unit is used to detect the pH values ​​in the physicochemical primary pH adjustment tank 31, the physicochemical secondary pH adjustment tank 41, and the standard discharge tank 6. The fluoride ion concentration detection unit is used to detect the fluoride ion concentrations in the physicochemical primary reaction tank 32, the physicochemical secondary reaction tank 42, and the standard discharge tank 6. In detail, the pH detection unit includes three pH detectors 50, and the three pH detectors 50 are respectively arranged in the physicochemical primary pH adjustment tank 31, the physicochemical secondary pH adjustment tank 41, and the standard discharge tank 6. The fluoride ion concentration detection unit includes three fluoride ion concentration detectors 60, and the three fluoride ion concentration detectors 60 are respectively arranged in the physicochemical primary reaction tank 32, the physicochemical secondary reaction tank 42, and the standard discharge tank 6.

[0049] The controller is respectively connected with the pH detection unit, the fluoride ion concentration detection unit, the first dosing pump 301, the second dosing pump 3002, the third dosing pump 3003, the fourth dosing pump 3004, the fifth dosing pump 3005, the sixth dosing pump 3006, the seventh dosing pump 3007, the eighth dosing pump 3008, the ninth dosing pump 3009, the tenth dosing pump 3010, the eleventh dosing pump 3011, the first water inlet pump 401, the second water inlet pump 402, and the third water inlet pump 403. The controller controls the third water inlet pump 403, the first dosing pump 3001, the second dosing pump 3002, the third dosing pump 3003, the fourth dosing pump 3004, and the fifth dosing pump 3005 to start or stop according to the detection result of the pH detection unit. The controller controls the sixth dosing pump 3006 and the seventh dosing pump 3007 to start or stop according to the detection result of the fluoride ion concentration detection unit.

[0050] In order to mix the wastewater in the pool evenly, in this embodiment, the comprehensive regulating tank 2, the physicochemical first-level pH regulating tank 31, the physicochemical first-level reaction tank 32, the physicochemical first-level coagulation tank 33, the physicochemical first-level flocculation tank 34, the physicochemical second-level pH regulating tank 41, the physicochemical second-level reaction tank 42, the physicochemical second-level coagulation tank 43, the physicochemical second-level flocculation tank 44, the lime milk agent storage tank 8, and the polyacrylamide agent configuration tank 20 are respectively provided with stirring devices 70.

[0051] Aeration devices 80 are respectively provided at the bottom of the low-alkali wastewater collection tank 1, the neutralization and callback tank 5, the standard discharge tank 6, the calcium chloride agent storage tank 9, and the polyaluminium chloride agent storage tank 10.

[0052] In order to promote the separation of mud and water in the physical and chemical primary sedimentation tank 35 and the physical and chemical secondary sedimentation tank 45, in this embodiment, a mud scraping device 90 is provided in the physical and chemical primary sedimentation tank 35 and the physical and chemical secondary sedimentation tank 45. The stirring device 70, the aeration device 80 and the mud scraping device 90 are all prior arts and will not be elaborated in detail here.

[0053] In order to facilitate the discharge of sludge in the physicochemical primary sedimentation tank 35 and the physicochemical secondary sedimentation tank 45, in this embodiment, the physicochemical primary sedimentation tank 35 and the physicochemical secondary sedimentation tank 45 are respectively connected to an external sewage pipeline (not shown) through a sludge pump (not shown), and the sludge pump is connected to the controller signal.

[0054] In order to improve the practical safety and service life of the pool, the surfaces of the low-alkali wastewater collection pool 1, the comprehensive regulating pool 2, the physicochemical primary pH regulating pool 31, the physicochemical primary reaction pool 32, the physicochemical primary coagulation pool 33, the physicochemical primary flocculation pool 34, the physicochemical primary sedimentation pool 35, the physicochemical secondary pH regulating pool 41, the physicochemical secondary reaction pool 42, the physicochemical secondary coagulation pool 43, the physicochemical secondary flocculation pool 44, the physicochemical secondary sedimentation pool 45, the neutralization callback pool 5, the standard discharge pool 6, the lime milk agent storage pool 8, and the calcium chloride agent storage pool 9 are provided with an anti-corrosion layer (not shown). In this embodiment, the anti-corrosion layer is an epoxy resin layer, which is an existing known material.

[0055] In an optional embodiment, the low-alkali wastewater collection tank 1, the comprehensive regulating tank 2, the physicochemical primary pH regulating tank 31, the physicochemical primary reaction tank 32, the physicochemical primary coagulation tank 33, the physicochemical primary flocculation tank 34, the physicochemical primary sedimentation tank 35, the physicochemical secondary pH regulating tank 41, the physicochemical secondary reaction tank 42, the physicochemical secondary coagulation tank 43, the physicochemical secondary flocculation tank 44, the physicochemical secondary sedimentation tank 45, the neutralization callback tank 5, the standard discharge tank 6, the lime milk agent storage tank 8, and the calcium chloride agent storage tank 9 are all steel concrete structures. In another optional embodiment, the above tanks are all made of steel plates. This application does not make specific restrictions on this.

[0056] When in use, low-alkali wastewater is collected in the low-alkali wastewater collection tank 1, and mixed to an average value under the action of the aeration device 80, and then transported to the physical and chemical secondary pH adjustment tank 41 through the third water inlet pump 403. At the same time, fluorine-containing wastewater is collected in the comprehensive adjustment tank 2, and mixed evenly under the action of the stirring device 70. The controller controls the start and stop of the first water inlet pump 401 and the first dosing pump, so that the low-alkali wastewater and sulfuric acid agent are respectively added to the comprehensive adjustment tank 2, so that the pH value of the fluorine-containing wastewater in the comprehensive adjustment tank 2 is between 2 and 5, and then transported to the physical and chemical primary pH adjustment tank 31 through the second water inlet pump 402.

[0057] The pH detector 50 set in the physical and chemical primary pH regulating tank 31 detects the pH value in the tank. The controller controls the start and stop of the second dosing pump 3002 and the fourth dosing pump 3004 according to the detection result of the pH detector 50, and then controls the delivery amount of the lime milk agent or the sulfuric acid agent to adjust the pH value in the physical and chemical primary pH regulating tank 31 to about 7. The lime milk agent can provide a certain amount of calcium ions to react with the fluoride ions in the fluoride-containing wastewater. Then the controller controls the sixth dosing pump 3006 to start, and the calcium chloride agent is added into the physical and chemical primary pH regulating tank 31 to introduce excessive calcium ions. Due to the common ion effect, the calcium ions can react with the fluoride ions to form calcium fluoride flocs more fully.

[0058] Under the action of hydraulic pressure, calcium fluoride flocs flow into the physicochemical primary coagulation tank 33 with the water flow, and the controller controls the eighth dosing pump 3008 and the tenth dosing pump 3010 to start, and respectively add polyaluminum chloride agent and polyacrylamide agent into the physicochemical primary coagulation tank 33, and under the action of hydraulic pressure, they flow into the physicochemical primary coagulation tank 34 together to form alum flocs in the physicochemical primary coagulation tank 34.

[0059] Under the action of hydraulic power, the alum flocs flow by themselves into the physical and chemical primary sedimentation tank 35 for flocculation and sedimentation, and are stratified and sedimented under the promotion of the sludge scraper device 90, and finally the sludge is discharged through the sludge pump.

[0060] By controlling the dosage of lime milk, calcium chloride and other chemicals, the fluoride ion content in the effluent of the physical and chemical primary sedimentation tank 35 can reach between 6mg / L and 7.5mg / L, and the fluoride ion index has reached the discharge standard. The effluent pH value is between 6-6.8, and the pH value has reached the discharge standard, but the pH value is low and there is a risk of exceeding the standard.

[0061] Then, under the action of hydraulic force, the upper layer of liquid in the physicochemical primary sedimentation tank 35 flows by gravity into the physicochemical secondary PH regulating tank 41. The PH detector 50 in the physicochemical secondary PH regulating tank 41 detects the PH value in the tank. The controller controls the start and stop of the third water inlet pump 403 and the third dosing pump 3003 according to the detection result of the PH detector 50, and then controls the delivery amount of low-alkali wastewater or sulfuric acid agent to adjust the low pH value of the effluent from the physicochemical primary sedimentation tank 35 and make the PH value in the physicochemical secondary PH regulating tank 41 between 6.5 and 8.5.

[0062] Then the controller starts the seventh dosing pump 3007, and calcium chloride is added into the physicochemical secondary pH regulating tank 41 to form calcium fluoride flocs, which flow to the physicochemical secondary reaction tank 42 under the action of water flow, and the fluoride ion concentration in the physicochemical secondary reaction tank 42 is less than 8 mg / L, and then passes through the physicochemical secondary coagulation tank 43, the physicochemical secondary flocculation tank 44, the physicochemical secondary sedimentation tank 45, and the neutralization callback tank 5 in turn to reach the standard discharge tank 6, and the pH value in the standard discharge tank 6 is 6-9, and the fluoride ion concentration is less than 8 mg / L. Among them, the wastewater treatment process in the physicochemical secondary coagulation tank 43, the physicochemical secondary flocculation tank 44, and the physicochemical secondary sedimentation tank 45 is the same as the treatment process in the physicochemical primary treatment module. For details, please refer to the above content, which will not be repeated here.

[0063] Due to the application of the above technical solution, the beneficial effects of the present application compared with the prior art are:

[0064] The present application provides a TOPCON battery low-alkali wastewater treatment system, which replaces the prior art method of directly mixing various wastewaters and then treating them by storing low-alkali wastewater and fluoride-containing wastewater separately, controlling the amount of low-alkali wastewater entering the comprehensive regulating tank through a first water inlet pump, and quantitatively mixing and then treating the mixed wastewater. This avoids the situation in which the pH value of the mixed wastewater is uncontrollable due to uncertain factors such as the pH value and water volume of low-alkali wastewater and fluoride-containing wastewater.

[0065] The present application is also provided with a sulfuric acid storage tank and a lime milk agent storage tank. The sulfuric acid storage tank is connected to the comprehensive regulating tank through a first dosing pump to add sulfuric acid, thereby adjusting the initial pH value in the comprehensive regulating tank. The lime milk agent storage tank is connected to the physical and chemical primary pH regulating tank through a fourth dosing pump to add lime, thereby adjusting the pH value in the physical and chemical primary pH regulating tank. Since the low-alkali wastewater and the fluorine-containing wastewater are stored separately and mixed in controlled amounts, the pH value of the mixed wastewater is close to the expected value, which can reduce the use of lime milk agents and sulfuric acid agents and reduce costs.

[0066] At the same time, the low-alkali wastewater collection pool and the physical and chemical secondary pH regulating pool are connected through the third water inlet pump. The method of transporting low-alkali wastewater to the physical and chemical secondary pH regulating pool to adjust the pH value replaces the original method of adding lime milk reagents, which can effectively reduce the use of lime milk reagents and further reduce the investment cost of chemical reagents. Moreover, the pH value is adjusted by acid-base neutralization of low-alkali wastewater and fluoride-containing wastewater, which simultaneously avoids the use of acid reagents required for treating low-alkali wastewater, reducing dependence on chemical reagents and the impact on the environment.

[0067] In addition, by setting up the coordination of detection components, controllers and pumps, the pH value and fluoride ion content in the pool can be automatically detected and the corresponding reagents can be automatically added. This real-time monitoring and automatic control mechanism can improve the stability and efficiency of the system, while reducing human intervention, making the wastewater treatment process more intelligent and reliable.

[0068] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A TOPCON battery low-alkali wastewater treatment system, characterized in that: include: A low-alkali wastewater collection pool, used to collect low-alkali wastewater; A comprehensive regulating tank, used for collecting fluorine-containing wastewater, wherein the comprehensive regulating tank is connected to the low-alkali wastewater collection tank through a first water inlet pump; The physicochemical primary treatment module comprises a physicochemical primary pH regulating tank, a physicochemical primary reaction tank, a physicochemical primary coagulation tank, a physicochemical primary flocculation tank and a physicochemical primary sedimentation tank which are connected by gravity in sequence from front to back, and the physicochemical primary pH regulating tank is connected to the comprehensive regulating tank through a second water inlet pump; The physicochemical secondary treatment module comprises a physicochemical secondary pH regulating tank, a physicochemical secondary reaction tank, a physicochemical secondary coagulation tank, a physicochemical secondary flocculation tank and a physicochemical secondary sedimentation tank which are connected by gravity from front to back in sequence, wherein the physicochemical secondary pH regulating tank is connected by gravity with the physicochemical primary sedimentation tank, and is connected with the low-alkali wastewater collection tank through a third water inlet pump; A neutralization callback tank, connected to the physicochemical secondary sedimentation tank by gravity; A standard discharge pool connected to the neutralization callback pool by gravity; A sulfuric acid storage tank is connected to the comprehensive regulating tank through a first dosing pump, connected to the physical and chemical primary pH regulating tank through a second dosing pump, and connected to the physical and chemical secondary pH regulating tank through a third dosing pump; A lime milk reagent storage tank is connected to the physical and chemical primary pH regulating tank through a fourth dosing pump, and is connected to the physical and chemical secondary pH regulating tank through a fifth dosing pump; A calcium chloride agent storage tank is connected to the physical and chemical primary pH regulating tank through a sixth dosing pump, and is connected to the physical and chemical secondary pH regulating tank through a seventh dosing pump; The polyaluminium chloride agent storage tank is connected to the physicochemical primary coagulation tank through an eighth dosing pump, and is connected to the physicochemical secondary coagulation tank through a ninth dosing pump; A polyacrylamide reagent preparation tank is connected to the physicochemical primary coagulation tank through a tenth dosing pump, and is connected to the physicochemical secondary coagulation tank through an eleventh dosing pump; The detection component includes a pH detection unit and a fluoride ion concentration detection unit, wherein the pH detection unit is used to respectively detect the pH values ​​in the physicochemical primary pH adjustment tank, the physicochemical secondary pH adjustment tank, and the standard discharge tank; the fluoride ion concentration detection unit is used to respectively detect the fluoride ion concentrations in the physicochemical primary reaction tank, the physicochemical secondary reaction tank, and the standard discharge tank; A controller is respectively connected to the pH detection unit, the fluoride ion concentration detection unit, the first dosing pump, the second dosing pump, the third dosing pump, the fourth dosing pump, the fifth dosing pump, the sixth dosing pump, the seventh dosing pump, the eighth dosing pump, the ninth dosing pump, the tenth dosing pump, the eleventh dosing pump, the first water inlet pump, the second water inlet pump, and the third water inlet pump; The controller controls the third water inlet pump, the first dosing pump, the second dosing pump, the third dosing pump, the fourth dosing pump, and the fifth dosing pump to start or stop according to the detection result of the pH detection unit; the controller controls the sixth dosing pump and the seventh dosing pump to start or stop according to the detection result of the fluoride ion concentration detection unit.

2. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 1, characterized in that: The comprehensive regulating tank, the physicochemical first-level pH regulating tank, the physicochemical first-level reaction tank, the physicochemical first-level coagulation tank, the physicochemical first-level flocculation tank, the physicochemical second-level pH regulating tank, the physicochemical second-level reaction tank, the physicochemical second-level coagulation tank, the physicochemical second-level flocculation tank, the lime milk agent storage tank, and the polyacrylamide agent configuration tank are respectively provided with stirring devices.

3. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 1, characterized in that: The physicochemical primary sedimentation tank and the physicochemical secondary sedimentation tank are provided with a sludge scraping device.

4. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 1, characterized in that: Aeration devices are respectively provided at the bottom of the low-alkali wastewater collection tank, the neutralization callback tank, the standard discharge tank, the calcium chloride agent storage tank, and the polyaluminium chloride agent storage tank.

5. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 1, characterized in that: The physicochemical primary sedimentation tank and the physicochemical secondary sedimentation tank are respectively connected to an external sewage discharge pipeline through a sludge pump, and the sludge pump is connected to the controller signal.

6. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 1, characterized in that: The PH detection unit includes three PH detectors, and the three PH detectors are respectively arranged in the physicochemical primary PH adjustment tank, the physicochemical secondary PH adjustment tank, and the standard discharge tank.

7. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 1, characterized in that: The fluoride ion concentration detection unit includes three fluoride ion concentration detectors, and the three fluoride ion concentration detectors are respectively arranged in the physicochemical primary reaction tank, the physicochemical secondary reaction tank, and the standard discharge tank.

8. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 1, characterized in that: The surfaces of the low-alkali wastewater collection tank, the comprehensive regulating tank, the physicochemical first-level pH regulating tank, the physicochemical first-level reaction tank, the physicochemical first-level coagulation tank, the physicochemical first-level flocculation tank, the physicochemical first-level sedimentation tank, the physicochemical second-level pH regulating tank, the physicochemical second-level reaction tank, the physicochemical second-level coagulation tank, the physicochemical second-level flocculation tank, the physicochemical second-level sedimentation tank, the neutralization callback tank, the standard discharge tank, the lime milk agent storage tank, and the calcium chloride agent storage tank are provided with an anti-corrosion layer.

9. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 8, characterized in that: The low-alkali wastewater collection tank, the comprehensive regulating tank, the physicochemical first-level pH regulating tank, the physicochemical first-level reaction tank, the physicochemical first-level coagulation tank, the physicochemical first-level flocculation tank, the physicochemical first-level sedimentation tank, the physicochemical second-level pH regulating tank, the physicochemical second-level reaction tank, the physicochemical second-level coagulation tank, the physicochemical second-level flocculation tank, the physicochemical second-level sedimentation tank, the neutralization and callback tank, the standard discharge tank, the lime milk agent storage tank, and the calcium chloride agent storage tank are all steel concrete structures or are made of steel plates.

10. A TOPCON battery low-alkali wastewater treatment system as claimed in claim 8, characterized in that: The anti-corrosion layer is an epoxy resin layer.

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