Lithium ion battery positive electrode material preparation wastewater recycling system

Abstract

The utility model discloses a lithium ion battery positive electrode material preparation wastewater recycling system. The system is characterized in that a first filtering device, a second filtering device and a third filtering device are sequentially connected to a water outlet of a sedimentation tank; the water storage tank is used for storing filtered water filtered by the first filtering device, the second filtering device and the third filtering device in sequence; a water inlet of the second water pump is connected to a water outlet of the water storage tank, and a water outlet of the second water pump is connected to a water using end through a pipeline. Three different levels of filtering devices are sequentially arranged on a water outlet of a sedimentation tank; by reasonably configuring three different levels of filtering precision, the relatively clean wastewater after three-level filtering is stored in the water storage tank for later use, so that in-plant secondary utilization of the wastewater is realized. Meanwhile, besides secondary recycling of the solid waste deposited in the sedimentation tank, the three filtering devices can intercept the solid waste with different particle sizes, and secondary recycling of the solid waste intercepted by the three filtering devices is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field more particularly, relate to a kind of lithium ion battery positive electrode material preparation wastewater recycling system. BACKGROUND

[0002] Lithium ion battery powder material includes positive electrode material and negative electrode material, taking lithium ion battery ternary positive electrode material preparation as an example, ternary positive electrode material in preparation process, washing kettle in wet washing process in cleaning process will produce the mixed waste liquid of washing wastewater waste material;Dehydration process vertical press carries out dehydration operation, and mixed waste liquid of wastewater waste material is generated after dehydration. As shown in FIG. Figure 1 Currently, the mixed waste liquid of wastewater waste material generated in two production links is discharged to a three-stage sedimentation tank for sedimentation and then discharged to a sewage treatment station for treatment, and the wastewater treated to meet the requirements is discharged to a municipal sewage treatment plant for treatment. The wastewater after sedimentation is directly discharged to the sewage treatment station, which increases the workload of the sewage treatment station and increases the operating cost;The qualified water treated by the sewage treatment station is directly discharged, without secondary utilization, resulting in waste of water resources;In addition, the general workshop is far away from the sewage treatment station, and the mixed liquid of wastewater waste material contains metal solid waste material, which is easy to precipitate, and long-term precipitation can cause pipe blockage, increase maintenance cost and delay production plan.

[0003] Therefore, how to provide a water treatment system for recycling wastewater and metal solid waste material in the factory becomes a technical problem to be solved in the field. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a water treatment system for recycling wastewater and metal solid waste material in the factory.

[0005] The utility model provides a kind of lithium ion battery positive electrode material preparation wastewater recycling system, comprising:

[0006] Sedimentation tank, the drainage outlet of sedimentation tank is sequentially connected with first filter device, second filter device and third filter device;

[0007] Water storage tank, for storing filtered water filtered by first filter device, second filter device and third filter device sequentially;

[0008] Second water pump, the water inlet of second water pump is connected on the water outlet of water storage tank, and the water outlet of second water pump is connected to water end by pipeline.

[0009] Optionally, the filtering accuracy of first filter device is 50 μm;

[0010] And / or, the filtering accuracy of second filter device is 5 μm;

[0011] And / or, the third filtering device has a filtering precision of 1 μm;

[0012] The system further comprises a first water pump, which is arranged between the second filtering device and the third filtering device, and can pump the filtrate of the second filtering device to the third filtering device under pressure.

[0013] Optionally, the first filtering device comprises a filter plate made of 316L stainless steel and having a filtering precision of 50 μm.

[0014] And / or, the second filtering device comprises a filtering pool made of nylon filter cotton and having a filtering precision of 5 μm.

[0015] And / or, the third filtering device comprises an ultrafiltration filter made of PVC and having a filtering precision of 1 μm.

[0016] Optionally, the sedimentation tank is a three-stage sedimentation tank.

[0017] Optionally, the three-stage sedimentation tank comprises an inner lining made of PVC plate.

[0018] Optionally, a high-precision filter is arranged on the pipeline between the water inlet of the second water pump and the water outlet of the water storage tank.

[0019] Optionally, the pipeline between the water inlet of the second water pump and the water outlet of the water storage tank comprises two main water outlet pipelines and two standby water outlet pipelines.

[0020] Two second water pumps are arranged, and each second water pump is connected to the water storage tank through a main water outlet pipeline; one end of the standby water outlet pipeline is communicated with the water storage tank, and the other end of the standby water outlet pipeline is communicated with the main water outlet pipeline.

[0021] High-precision filters are arranged on the main water outlet pipelines and the standby water outlet pipelines.

[0022] Optionally, pressure detectors are arranged on the front and back sides of the high-precision filters.

[0023] Optionally, a precision filter is arranged on the water inlet side of the first water pump.

[0024] Optionally, a first water outlet pipeline and a second water outlet pipeline are arranged in parallel on the water outlet side of the first water pump, the first water outlet pipeline is connected to the third filtering device, and the second water outlet pipeline is communicated to a sewage treatment station.

[0025] According to the technical content disclosed in the utility model, the following beneficial effects are achieved:

[0026] The lithium ion battery positive electrode material preparation wastewater recycling system has the advantages that the first filter device, the second filter device and the third filter device are sequentially connected on the drainage outlet of the sedimentation tank, the filtering precision of the three-stage filtering is reasonably configured, the overflow wastewater of the sedimentation tank is basically filtered clean after the three-stage filtering, the relatively clean wastewater after the three-stage filtering is stored in the water storage tank and is delivered to the water using end through the second water pump, the in-plant secondary utilization of the wastewater is realized, the deposited solid waste in the sedimentation tank can be secondarily recycled, the first filter device, the second filter device and the third filter device can intercept solid waste of different particle sizes, and therefore the first filter device, the second filter device and the third filter device can be flushed to secondarily recycle the solid waste intercepted by the filter device.

[0027] Other features of the present application, and their advantages, will become apparent from the following detailed description of illustrative embodiments of the present application, with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0029] Figure 1 It is a wastewater treatment system structural diagram in the background art of the present application.

[0030] Figure 2 It is a lithium ion battery positive electrode material preparation wastewater recycling system structural diagram of the present application.

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application. DETAILED DESCRIPTION

[0032] Various example embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps illustrated in these embodiments, numerical expressions, and numerical values are not limiting to the scope of the present application unless otherwise specifically stated.

[0033] The following description of at least one example embodiment is merely illustrative in nature and is in no way limiting to the scope of the present application or its applications or uses.

[0034] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art(s) can not be discussed in detail herein. However, where appropriate, the techniques, methods, and apparatus should be considered as being illustrative only and should not be considered as limiting.

[0035] In all of the compositions shown and discussed herein, any specific numerical value should be interpreted as merely an example, and not as a limitation. Other examples of the exemplary embodiments can have different values.

[0036] It should be noted that like reference numerals and letters refer to like items throughout the attached drawings, and thus, once an item is defined in one drawing, it is not necessary that it be further discussed in the remaining drawings.

[0037] Referring to Figure 2 The utility model discloses a lithium ion battery positive pole material preparation wastewater recycling system, including vertical filter press, sedimentation tank 2, first filter device 301, second filter device 302, third filter device 303 and water storage tank 4 that connect gradually.

[0038] Vertical filter press sets two, including juxtaposition setting's first vertical filter press 101 and second vertical filter press 102, and the waste liquid pipeline of first vertical filter press 101 and second vertical filter press 102 is connected with the feed inlet of sedimentation tank 2, and the waste liquid pipeline of first vertical filter press 101 and second vertical filter press 102 is respectively provided with at least one valve 8 of controlling pipeline on-off, and the waste water waste material mixture produced in the operation process of first vertical filter press 101 and second vertical filter press 102 enters sedimentation tank 2 through waste liquid pipeline after the valve 8 on the two waste liquid pipelines connecting first vertical filter press 101 and second vertical filter press 102 respectively is opened.

[0039] Further, sedimentation tank 2 is three-stage sedimentation tank, and the inner lining of sedimentation tank 2 is welded by 10mm thick PVC plate material, prevents the corrosion component in waste water from carrying out corrosion to the inside of pool body, and after waste water is deposited in three stages, most fixed waste material is deposited at the bottom of pool, and the material at the bottom needs to be cleaned regularly or irregularly, and the metal impurities cleaned out can be recycled or sold.

[0040] The drainage outlet of the sedimentation tank 2 is sequentially connected with a first filtering device 301, a second filtering device 302 and a third filtering device 303; the first filtering device 301 comprises a filter plate made of 316L stainless steel with a filtering precision of 50 μm; the second filtering device 302 comprises a filtering pool composed of nylon filtering cotton with a filtering precision of 5 μm; the third filtering device 303 comprises an ultrafiltration filter made of PVC with a filtering precision of 1 μm. The wastewater after being precipitated in the sedimentation tank 2 flows into the filter plate made of 316L stainless steel in the first filtering device 301 through gravity, and the material larger than 50 μm cannot pass through the filter plate, so the filter plate needs to be cleaned regularly and the waste particles are recovered; the wastewater after passing through the filter plate in the first filtering device 301 flows into the second filtering device 302 by gravity, and the filtering cotton in the filtering pool of the second filtering device 302 blocks the fixed material larger than 5 μm, at this time the wastewater becomes clean water, and the filtering cotton needs to be cleaned regularly; the clean water after passing through the filtering cotton is pressurized by the first water pump 501 into the ultrafiltration filter made of PVC, and the ultrafiltration filter can block the material larger than 1 μm, at this time the particle size and content of the clean water particles are the same as tap water, and the clean water at this time becomes production water that can be directly used.

[0041] It should be noted that, in order to ensure the filtering effect of the third filtering device 303, the first water pump 501 is arranged between the second filtering device 302 and the third filtering device 303, and the first water pump 501 can pressurize and pump the filtrate of the second filtering device 302 to the third filtering device 303. Two first water pumps 501 are arranged to realize one in use and one in standby. The water inlet ends of each first water pump 501 are connected in parallel to two pipelines, and the other ends of the pipelines are connected to the water outlet of the second filtering device 302. A valve 8 and a precision filter 6 are arranged on each pipeline, and the valve 8 is arranged at the front end of the precision filter 6. When the filter cotton filtering pool of the second filtering device 302 reaches a certain water level, the valve 8 on one pipeline is opened, and the corresponding first water pump 501 is started through the liquid level switch to pump the water of the second filtering device 302 to the third filtering device 303. Further, the pipeline leading to the third filtering device 303 is a first water outlet pipeline, the first water outlet pipeline is connected with a second water outlet pipeline, the second water outlet pipeline is used for draining water to a sewage treatment station, and the valves 8 are arranged on the second water outlet pipeline and the end of the first water outlet pipeline close to the third filtering device 303. By adjusting the corresponding valve 8, the water of the second filtering device 302 can be pumped to the third filtering device 303 or the sewage treatment station.

[0042] The liquid outlet pipe of the third filtering device 303 is connected with the water inlet of the water storage tank 4, and the water storage tank 4 is used for storing the filtered water filtered by the first filtering device 301, the second filtering device 302 and the third filtering device 303 in sequence; the filtered water filtered by the second filtering device 302 and the third filtering device 303 is directly delivered to the water storage tank 4 through the pipe. The water inlet of the second water pump 502 is connected with the water outlet of the water storage tank 4, and the water outlet of the second water pump 502 is connected with the water end of the factory through the pipe. The pipe between the water inlet of the second water pump 502 and the water outlet of the water storage tank 4 comprises two main water outlet pipes and two standby water outlet pipes; the second water pump 502 is provided with two, and each second water pump 502 is connected with the water storage tank 4 through a main water outlet pipe; one end of the standby water outlet pipe is connected with the water storage tank, and the other end of the standby water outlet pipe is connected with the main water outlet pipe; the main water outlet pipe and the standby water outlet pipe are both provided with high-precision filters 7. The front and back sides of the high-precision filter 7 are both provided with pressure detectors. When the user end has a water demand, the secondary utilization water in the water storage tank 4 is sent to the user end through the high-precision filter 7 and one second water pump 502, one second water pump 502 and two high-precision filters 7 connected in parallel form a group, and two second water pumps 502 are used alternately; the water storage tank 4 is provided with a high-position limiting switch, when the water level in the water storage tank 4 is high, a valve on the pipe through which the second filtering device 302 drains water to the third filtering device 303 is closed, and a valve 8 on the second water outlet pipe is opened to send the filtered water of the second filtering device 302 to the sewage treatment station for treatment.

[0043] In conclusion, the lithium ion battery positive electrode material preparation wastewater recycling system provided by the utility model is a wastewater treatment and recycling system for wastewater generated in the production process of positive electrode materials, realizes the recycling of wastewater, reduces wastewater discharge and reduces production cost; the design principle of the wastewater recycling device is that the wastewater and waste liquid generated in the preparation process of lithium ion battery positive electrode materials are discharged into the concrete structure three-stage sedimentation tank through the pipeline, then subjected to three-stage filtration, and the treated clean water is stored in the PP material water storage tank 4; when the user end has a water demand, the clean water is sent to the user end through the pressure pump for equipment cleaning or mopping, etc.; the outlet high-precision filter prevents the dirt in the pipeline from falling off. Each high-precision filter 7 and the precision filter 6 are provided with automatic backwashing function, and the filters are backwashed at regular time to prevent the filters from being blocked; the pressure detectors are arranged in front of and behind the filters, and when the detected pressure is too high, the device will stop and alarm automatically to prevent the filters from being blocked and causing the equipment to be damaged due to high pressure.

[0044] Therefore, in the actual use process, the wastewater can be recycled and reused, and the filtered water can be used for cleaning and ground cleaning of wet equipment such as filter press and water washing kettle, thereby reducing the waste of water resources.

[0045] Although some specific embodiments of the present application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A lithium ion battery cathode material preparation wastewater recycling system, characterized in that, The system comprises: a sedimentation tank, a first filter device, a second filter device and a third filter device are sequentially connected to the drain of the sedimentation tank; a water storage tank for storing filtered water filtered by the first filter device, the second filter device and the third filter device in sequence; a second water pump, the water inlet of the second water pump is connected to the water outlet of the water storage tank, and the water outlet of the second water pump is connected to a water using end for equipment cleaning or ground cleaning through a pipeline.

2. The system for recycling wastewater generated in preparation of lithium ion battery positive electrode material according to claim 1, characterized in that: the first filter device has a filtering accuracy of 50 μm; and / or, the second filter device has a filtering accuracy of 5 μm; and / or, the third filter device has a filtering accuracy of 1 μm; the system further comprises a first water pump, which is arranged between the second filter device and the third filter device, and can pump the filtrate of the second filter device to the third filter device under pressure.

3. The system for recycling wastewater generated in preparation of lithium ion battery positive electrode material according to claim 2, characterized in that: the first filter device comprises a filter plate made of 316L stainless steel with a filtering accuracy of 50 μm; and / or, the second filter device comprises a filter tank composed of nylon filter cotton with a filtering accuracy of 5 μm; and / or, the third filter device comprises an ultrafiltration filter made of PVC with a filtering accuracy of 1 μm.

4. The system for recycling wastewater generated in preparation of lithium ion battery positive electrode material according to any one of claims 1 to 3, characterized in that: the sedimentation tank is a three-stage sedimentation tank.

5. The system for recycling wastewater generated in preparation of lithium ion battery positive electrode material according to claim 4, characterized in that: the three-stage sedimentation tank comprises an inner lining welded by PVC plates.

6. The system for recycling wastewater generated in preparation of lithium ion battery positive electrode material according to any one of claims 1 to 3, characterized in that: a high-precision filter is arranged on the pipeline between the water inlet of the second water pump and the water outlet of the water storage tank.

7. The system for recycling wastewater generated in preparation of lithium ion battery positive electrode material according to claim 6, characterized in that: the pipeline between the water inlet of the second water pump and the water outlet of the water storage tank comprises two main water outlet pipelines and two standby water outlet pipelines; two second water pumps are arranged, and each of the second water pumps is connected to the water storage tank through one of the main water outlet pipelines; one end of each of the standby water outlet pipelines is connected to the water storage tank, and the other end of each of the standby water outlet pipelines is connected to the main water outlet pipeline; and the high-precision filter is arranged on each of the main water outlet pipelines and the standby water outlet pipelines.

8. The system for recycling wastewater generated in preparation of lithium ion battery positive electrode material according to claim 6, characterized in that: pressure detectors are arranged on the front and back sides of the high-precision filter.

9. The system for recycling wastewater generated in preparation of lithium ion battery positive electrode material according to claim 2 or 3, characterized in that: a precision filter is arranged on the water inlet side of the first water pump. ​ 10. The system for recycling and reusing wastewater generated in the preparation of lithium ion battery cathode materials according to claim 2 or 3, characterized in that: a first outlet pipeline and a second outlet pipeline are arranged in parallel on the outlet side of the first water pump, the first outlet pipeline is connected to the third filtering device, and the second outlet pipeline is connected to a sewage treatment station.

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