Iron phosphate wastewater treatment system

Abstract

The utility model relates to an iron phosphate wastewater treatment system which comprises a temporary storage container, a stirring mechanism, a reaction container, a lifting pump, a sludge squeezing pump, a filter press, a filtrate container, connecting pipelines and a wastewater adjusting tank, wherein the wastewater adjusting tank is connected to the reaction container through a first pipeline, and an adjusting tank lifting pump is arranged on the first pipeline; the reaction container is connected to the temporary storage container through a second pipeline, and a reaction tank lifting pump is arranged on the second pipeline; a plurality of temporary storage containers are arranged, and each temporary storage container is provided with a stirring mechanism and a lifting pump; the lifting pump is connected to the reaction container through a third pipeline, meanwhile, a pipeline arranged on the temporary storage container is connected to a filter press, and a sludge squeezing pump is arranged on the pipeline at the front end of the filter press; filtrate of the filter press is connected to a filtrate container through a fourth pipeline; a filtrate lifting pump is arranged on the filtrate tank and is connected to the next wastewater regulating reservoir through a pipeline; the wastewater treatment efficiency can be improved while the treatment quality is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of wastewater treatment, and in particular to a ferric phosphate wastewater treatment system. BACKGROUND

[0002] In the production process of a lithium iron phosphate power battery, ferric phosphate is a key positive material for producing the lithium iron phosphate power battery, and inevitably produces wastewater containing ferric phosphate in the production process. The wastewater must be treated and detected before being discharged for treatment. Generally, a wastewater treatment system is constructed in a workshop to reduce the total phosphorus concentration in the wastewater. After the wastewater is treated and the total phosphorus concentration reaches the discharge requirements of the workshop, the wastewater is discharged to a wastewater station in a factory for further purification treatment. With the emphasis on green environmental protection development in the battery industry, the generation of solid waste in the production process is strictly limited, and the discharge requirements are continuously improved. The traditional wastewater treatment cannot meet the production requirements, and reducing the generation of solid waste in the production process of ferric phosphate has a key significance for optimizing the green environmental protection structure of the battery industry. However, the existing treatment often needs to sacrifice the production efficiency to improve the treatment quality, which seriously affects the wastewater treatment efficiency and indirectly affects the overall production efficiency. CONTENT OF THE UTILITY MODEL

[0003] To solve or partially solve the problems in the prior art, the application provides a ferric phosphate wastewater treatment system which can improve the wastewater treatment efficiency while ensuring the treatment quality and reducing the sludge generation.

[0004] The application discloses a ferric phosphate wastewater treatment system, which comprises a temporary storage container, a stirring mechanism, a reaction container, a lifting pump, a sludge squeezing pump, a filter press, a filtrate container, various connecting pipelines and a wastewater conditioning tank.

[0005] The wastewater conditioning tank is connected to the reaction container through a first pipeline, and a conditioning tank lifting pump is arranged on the first pipeline.

[0006] The reaction container is connected to the temporary storage container through a second pipeline, and a reaction tank lifting pump is arranged on the second pipeline.

[0007] The temporary storage container is provided with a plurality of stirring mechanisms and lifting pumps, and the lifting pump is connected to the reaction container through a third pipeline. In addition, a pipeline connected to the filter press is arranged on the temporary storage container, and a sludge squeezing pump is arranged on the pipeline at the front end of the filter press.

[0008] The filtrate of the filter press is connected to the filtrate container through a fourth pipeline, and a filtrate lifting pump is arranged on the filtrate tank and connected to the next wastewater conditioning tank through a pipeline.

[0009] Optionally, a dosing device is arranged on the reaction container, and a dosing pump is arranged on the reaction container and connected to a liquid alkali container through a pipeline. A Ph detector is arranged in the reaction container and connected to a controller.

[0010] Optionally, the temporary storage container is provided with a detection port.

[0011] Optionally, the reaction container is provided as one, the temporary storage containers are provided as four, and the filter presses are provided as two.

[0012] Optionally, the four temporary storage containers are connected to the filter presses through one pipeline.

[0013] Optionally, the temporary storage containers are connected to the filter presses through a third pipeline, a branch pipeline connected to the reaction container is provided on the pipeline, and an electromagnetic valve is provided on the branch pipeline.

[0014] Optionally, a check valve is provided at the rear end of each lifting pump of the third pipeline.

[0015] Optionally, a branch pipeline connected to the next temporary storage container is provided at the front section of the check valve, and an electromagnetic valve is provided on the branch pipeline.

[0016] Optionally, an aeration device connected to a gas supply pipeline is provided at the bottom of the wastewater conditioning tank, and a gas blowing valve and a pressure relief valve are provided on the pipeline.

[0017] Optionally, a sampling port is provided on the filtrate container.

[0018] The technical scheme provided in the application can include the following beneficial effects:

[0019] The device adds reagents to the ferric phosphate wastewater in the reaction tank, then uses the reaction tank lifting pump to pump the sludge-water mixture into each temporary storage tank for further reaction, detects the mixture in each temporary storage tank, when TP < 30 mg / L, uses the sludge squeezing pump to pump it to the plate-and-frame filter press for sludge-water separation, dries the separated sludge, and then performs standard disposal, while the filtrate is introduced into the filtrate tank as a filtrate container for storage and detector property, and after meeting the requirements, is pumped to the plant wastewater station conditioning tank through the original lifting pump; if TP ≥ 30 mg / L, the temporary storage tank lifting pump is used to pump it back to the reaction tank for further reagent addition until TP < 30 mg / L. Through the treatment of the system, on the one hand, the wastewater in the previous tank can be immediately treated after being pumped out, and the reaction time can be left in each temporary storage tank, thus forming a cycle, so that the subsequent slurry does not have to wait for a long time, avoiding time waste and improving the wastewater treatment efficiency, while the entire system only increases the temporary storage tanks and the corresponding pipeline system, without increasing other equipment, reducing production costs; on the other hand, by setting corresponding valves on the pipeline and electrically connecting them through the controller to form an automatic control system for automatic control of the entire system, production control costs are reduced and work efficiency is increased. In this way, the system can improve the wastewater treatment efficiency while ensuring the treatment quality.

[0020] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and in which:

[0022] Figure 1 is a wastewater treatment flow chart shown in an embodiment of the present application;

[0023] Figure 2 is a system arrangement diagram shown in an embodiment of the present application;

[0024] Figure 3 is a regulating tank to reaction tank piping diagram shown in an embodiment of the present application;

[0025] Figure 4 is a reaction tank to temporary storage tank piping diagram shown in an embodiment of the present application;

[0026] Figure 5 is a reaction tank to sludge press pump and reaction tank piping diagram shown in an embodiment of the present application; Figure 1

[0027] REFERENCE NUMERALS:

[0028] 11, 1# temporary storage tank; 12, 2# temporary storage tank; 13, 3# temporary storage tank; 14, 4# temporary storage tank;

[0029] 21, 1# agitator; 22, 2# agitator; 23, 3# agitator; 24, 4# agitator;

[0030] 3, reaction tank;

[0031] 41, 1# lift pump; 42, 2# lift pump; 43, 3# lift pump; 44, 4# lift pump; 45, reaction tank lift pump; 46, regulating tank lift pump;

[0032] 51, 1# sludge press pump; 52, 2# sludge press pump;

[0033] 61, 1# filter press; 62, 2# filter press;

[0034] 7, electric control box;

[0035] 8, filtrate tank;

[0036] 9, first piping;

[0037] 10, second piping;

[0038] ​101, wastewater conditioning tank;

[0039] 102, third pipeline;

[0040] 103, fourth pipeline. DETAILED DESCRIPTION

[0041] Embodiments of the present application will be described in more detail with reference to the drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0042] It should be understood that although the terms "first", "second", "third", etc. are used to describe various information in the present application, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0043] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] To solve the above problems, the embodiments of the present application provide a ferric phosphate wastewater treatment system, and the technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings.

[0046] As Figure 1 ,Figure 2 The phosphorus iron wastewater treatment system shown includes a temporary storage container, a stirring mechanism, a reaction container, a lifting pump, a sludge press pump, a filter press, a filtrate container, various connecting pipelines, and a wastewater conditioning tank. In this application, phosphorus iron wastewater is collected in the phosphorus iron wastewater conditioning tank 101, and then pumped into the reaction tank 3 as a reaction container through the first pipeline 9 by the conditioning tank lifting pump 46 for reaction treatment. In actual production, one way is to manually add phosphorus removal agents and liquid alkali as reaction materials, and then pump the reacted solution into the temporary storage tank as a reaction tank lifting pump through the second pipeline 10 and the reaction tank lifting pump 45 provided on the pipeline. In this application, four temporary storage tanks are provided, namely 1# temporary storage tank 11, 2# temporary storage tank 12, 3# temporary storage tank 13, and 4# temporary storage tank 14. Each temporary storage tank is provided with a corresponding stirring mechanism and lifting pump. The 1# temporary storage tank 11 is provided with a 1# stirrer 21 as a stirring mechanism and a 1# lifting pump 41. The 2# temporary storage tank 12 is provided with a 2# stirrer 22 as a stirring mechanism and a 2# lifting pump 42. The 3# temporary storage tank 13 is provided with a 3# stirrer 23 as a stirring mechanism and a 3# lifting pump 43. The 4# temporary storage tank 14 is provided with a 4# stirrer 24 as a stirring mechanism and a 4# lifting pump 44. The lifting pumps of the four temporary storage tanks are connected to the reaction tank 3 through the third pipeline 102. Meanwhile, the pipelines of each temporary storage tank 1 are connected to the filter press 6, and the sludge press pump 5 is provided on the pipeline at the front end of the filter press 6. The filtrate of the filter press 6 is connected to the filtrate container through the fourth pipeline 103. The filtrate tank 8 is provided with a filtrate lifting pump and connected to the next wastewater conditioning tank through a pipeline. In the entire process, the start and stop of various electrical equipment are controlled by setting corresponding lights in the electrical control box 7 to form an electrical control system for unified control of the entire equipment system. If necessary, corresponding controllers can be set to automatically control these lights to form automatic control.

[0047] Thus, after the iron phosphate wastewater is reacted in the reaction tank 3, the mud-water mixture is pumped into each temporary storage tank by the reaction tank lifting pump to continue the reaction, the mixture in each temporary storage tank is detected, when TP < 30 mg / L, the mud-water mixture is pumped into the plate and frame filter press by the sludge squeezing pump for mud-water separation, the separated mud is dried and disposed according to the standard, and the filtrate is introduced into the filtrate tank 8 as a filtrate container for storage and detection of the properties, and after meeting the requirements, it is pumped to the factory wastewater station adjusting tank by the original lifting pump; if TP ≥ 30 mg / L, the mud-water mixture is pumped back to the reaction tank 3 by the temporary storage tank lifting pump to continue to add reagents until TP < 30 mg / L. Through the treatment of the system, on the one hand, the wastewater in the previous tank reaction tank 3 can be immediately treated after being pumped out, and the reaction time can be left in each temporary storage tank, so that a cycle can be formed, and the subsequent cement does not have to wait for a long time, avoiding time waste and improving the wastewater treatment efficiency, while the entire system only increases the temporary storage tank and the corresponding pipeline system, without increasing other equipment, reducing production costs; on the other hand, by setting corresponding valves on the pipeline and connecting them to the controller to form an automatic control system, the entire system can be automatically controlled, reducing production control costs and increasing work efficiency. Thus, the system can improve the wastewater treatment efficiency while ensuring the treatment quality, reduce the amount of solid waste generated in the production of iron phosphate, and has key significance for optimizing the green environmental protection structure of the battery industry.

[0048] In one embodiment, manual dosing may have errors and is not convenient, therefore, a dosing device is arranged on the reaction container, and a dosing pump is arranged and connected to a liquid alkali container through a pipeline, so that the dosing device and the dosing pump are used to add phosphorus removal agent and liquid alkali, and the dosing can be automatically controlled by electrical control when necessary, increasing the accuracy of dosing and reducing labor costs and dosing errors. A Ph detector is arranged in the reaction container and connected to the control, and the Ph detector is used to detect the Ph in the reaction tank 3. In actual production, the Ph value affects the viscosity of the sludge, and the Ph is controlled between 8 and 10, which can be 8, 9 or 10. Thus, through real-time detection of the Ph, the Ph is adjusted by adding liquid alkali, so that the reaction environment is between 8 and 10 to control the viscosity of the sludge, and the sludge dewatering and drying takes about 2 hours, if the Ph exceeds 10, the sludge dewatering takes about 5 hours, and too low Ph affects the phosphorus removal effect, therefore, liquid alkali is needed to adjust the Ph.

[0049] In one embodiment, each temporary storage tank is provided with a detection port to detect the TP of the solution. Of course, a corresponding detector can also be arranged on each temporary storage tank to automatically detect, and then the controller of the electrical control equipment is fed back with the corresponding detection results for subsequent automatic control. Thus, the entire system can be integrated as a whole for automatic control production.

[0050] In one embodiment, in order to further improve the efficiency of water treatment, in this application, a reaction tank 3 corresponds to four temporary storage tanks, and simultaneously corresponds to the configuration of two filter presses for production. The entire system is connected through corresponding pipelines, valves and pumps, and is uniformly controlled by an electric control system to form an automatic control production treatment system. The specific settings are as shown in Figure 2 , wherein the wastewater conditioning tank 101 delivers wastewater to the reaction tank 3 through a DN63 pipeline, and the pipeline is provided with a conditioning tank lifting pump 46 and an electromagnetic valve to form a first pipeline 9. The specific pipeline diagram is as shown in Figure 3 . The reaction tank 3 is connected to four temporary storage tanks through a second pipeline 10. The configuration of the second pipeline 10 is as shown in Figure 4 . The reaction tank 3 delivers reaction solution to each temporary storage tank through a DN63 pipeline. The reaction tank 3 is provided with a reaction tank lifting pump 45 electrically connected to the electric control system. Branch pipelines corresponding to each temporary storage tank are provided on the DN63 pipeline, and an electromagnetic valve connected to the electric control system is provided on each branch pipeline. Each of the four temporary storage tanks is provided with a corresponding stirrer, and the stirrer is eccentrically arranged. The four temporary storage tanks are connected to the 1# sludge press pump 51 and the 2# sludge press pump 52 at the front end of the 1# filter press 61 and the 2# filter press 62 through a third pipeline 102, and a branch pipeline connected to the reaction tank 3 is provided at the outlet. The specific pipeline diagram is as shown in Figure 5As shown, a DN63 pipeline is connected to the 1# temporary storage tank 11, a 1# booster pump 41 is arranged on the pipeline, a battery valve is arranged at the liquid outlet end of the 1# booster pump 41, and the 1# booster pump 41 and the battery valve are connected to the electric control system; a DN63 pipeline is connected to the 2# temporary storage tank 12, a 3# booster pump 43 is arranged on the pipeline, a battery valve is arranged at the liquid outlet end of the 3# booster pump 43, and the 2# booster pump 42 and the battery valve are connected to the electric control system; a DN110 pipeline is connected to the 3# temporary storage tank 13, a 3# booster pump 43 is arranged on the pipeline, a battery valve is arranged at the liquid outlet end of the 3# booster pump 43, and the 3# booster pump 43 and the battery valve are connected to the electric control system; a DN110 pipeline is connected to the 4# temporary storage tank 14, a 4# booster pump 44 is arranged on the pipeline, a battery valve is arranged at the liquid outlet end of the 3# booster pump 44, and the 3# booster pump 44 and the battery valve are connected to the electric control system; one end of the pipeline of the 1# temporary storage tank 11 is connected to the pipeline at the liquid outlet end of the electromagnetic valve of the 1# temporary storage tank 11, one end of the pipeline of the 2# temporary storage tank 12 is connected to the pipeline at the liquid outlet end of the electromagnetic valve of the 3# temporary storage tank 13, one end of the pipeline of the 3# temporary storage tank 13 is connected to the pipeline at the liquid outlet end of the electromagnetic valve of the 4# temporary storage tank 14, and one end of the pipeline of the 4# temporary storage tank 14 is connected to the liquid inlet end of the 1# sludge press pump and the 2# sludge press pump. At the same time, a branch pipeline connected to the reaction tank 3 is arranged on the pipeline of the 4# temporary storage tank 14, and an electromagnetic valve connected to the electric control system is arranged on the branch pipeline. As an option, the electromagnetic valve on the third pipeline 102 can be replaced by a check valve. In another arrangement, a branch pipeline connected to the 2# temporary storage tank 12 is arranged on the pipeline at the rear end of the 1# temporary storage tank 11; a branch pipeline connected to the 3# temporary storage tank 13 is arranged on the pipeline at the rear end of the 2# temporary storage tank 12; and a branch pipeline connected to the 4# temporary storage tank 14 is arranged on the pipeline at the rear end of the 3# temporary storage tank 13. In this way, the waste water can be sequentially delivered from the reaction tank 3 to the 1# temporary storage tank 11, the 2# temporary storage tank 12, the 3# temporary storage tank 13, and the 4# temporary storage tank 14 by controlling the opening and closing of the corresponding electromagnetic valves and booster pumps, thereby prolonging the reaction time and making the reaction more complete, while not affecting the subsequent operation.

[0051] In one embodiment, an aeration device is arranged at the bottom of the waste water conditioning tank 101 and connected to a gas supply pipeline, and a blowing valve and a pressure relief valve are arranged on the pipeline, so that the waste water in the waste water conditioning tank 101 can be prevented from generating a large amount of sediment.

[0052] In one embodiment, a sampling port is arranged on the filtrate tank 8 to sample and detect the filtered filtrate.

[0053] Finally, it should be noted that the terms "first" and "second", and the like, are used herein only to distinguish one identification entity from another, and do not require or imply these entities to be in any physical or logical order. Moreover, the terms "comprising", "including", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise, include, or are otherwise encompassed by a series of elements, do not require that all of the elements be present or that the elements be mutually exclusive, or either be exclusive of additional elements that are not specifically listed.

[0054] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e. may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0055] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical application or improvement of the technology in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A system for treating ferric phosphate wastewater, characterized in that, It comprises: Temporary storage container, stirring mechanism, reaction container, lifting pump, sludge squeezing pump, filter press, filtrate container, connecting pipeline, wastewater conditioning tank; The wastewater conditioning tank is connected to the reaction container through a first pipeline, and an adjusting tank lifting pump is arranged on the first pipeline; The reaction container is connected to the temporary storage container through a second pipeline, and a reaction tank lifting pump is arranged on the second pipeline; The temporary storage container is provided with multiple temporary storage containers, each of which is provided with a stirring mechanism and a lifting pump; the lifting pump is connected to the reaction container through a third pipeline, and the temporary storage container is connected to the filter press through a pipeline, and a sludge squeezing pump is arranged on the pipeline at the front end of the filter press; The filtrate of the filter press is connected to the filtrate container through a fourth pipeline; a filtrate lifting pump is arranged on the filtrate tank and connected to the next wastewater conditioning tank through a pipeline.

2. The iron phosphate wastewater treatment system of claim 1, wherein: A dosing device is arranged on the reaction container, and a dosing pump is arranged on the pipeline connected to the liquid alkali container.

3. The iron phosphate wastewater treatment system of claim 1, wherein: A detection port is arranged on the temporary storage container.

4. The ferric phosphate wastewater treatment system of claim 1, wherein: The reaction container is provided with one, the temporary storage container is provided with four, and the filter press is provided with two.

5. The iron phosphate wastewater treatment system of claim 4, wherein: The four temporary storage containers are connected to the filter press through a pipeline.

6. The iron phosphate wastewater treatment system of claim 1 or 4 or 5, wherein: The temporary storage container is connected to the filter press through a third pipeline, and a branch pipeline connected to the reaction container is arranged on the pipeline, and an electromagnetic valve is arranged on the branch pipeline.

7. The ferric phosphate wastewater treatment system of claim 1, wherein: A check valve is arranged at the rear end of each lifting pump of the third pipeline.

8. The iron phosphate wastewater treatment system of claim 7, wherein: A branch pipeline connected to the next temporary storage container is arranged at the front section of the check valve, and an electromagnetic valve is arranged on the branch pipeline.

9. The iron phosphate wastewater treatment system of claim 1, wherein: An aeration device connected to a gas supply pipeline is arranged at the bottom of the wastewater conditioning tank, and a gas blowing valve and a pressure relief valve are arranged on the pipeline.

10. The ferric phosphate wastewater treatment system of claim 1, wherein: A sampling port is arranged on the filtrate container.

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