CN218879665U - High-recovery-rate pure water preparation and concentrated water recovery equipment for lithium battery industry - Google Patents
High-recovery-rate pure water preparation and concentrated water recovery equipment for lithium battery industry Download PDFInfo
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- CN218879665U CN218879665U CN202223305186.0U CN202223305186U CN218879665U CN 218879665 U CN218879665 U CN 218879665U CN 202223305186 U CN202223305186 U CN 202223305186U CN 218879665 U CN218879665 U CN 218879665U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The utility model discloses a high recovery rate pure water preparation and concentrated water recovery device for lithium battery industry, which comprises a raw water tank, a filter, a multi-stage reverse osmosis device, an EDI device, a variable frequency water supply device, a concentrated water tank and a nanofiltration membrane recovery device; the raw water tank is connected with the filter, the filter is connected with the multistage reverse osmosis device, the reverse osmosis device is connected with the EDI device, and the EDI device is connected with the variable-frequency water supply device; the multistage reverse osmosis device comprises a first-stage reverse osmosis device and a second-stage reverse osmosis device, one end of the first-stage reverse osmosis device is connected with the filter, the other end of the first-stage reverse osmosis device is connected with the second-stage reverse osmosis device, and the second-stage reverse osmosis device is connected with the EDI device; the first-stage reverse osmosis device is connected with the concentrated water tank, the second-stage reverse osmosis device is respectively connected with the raw water tank and the concentrated water tank, the concentrated water tank is respectively connected with the nanofiltration membrane recovery device and the filter, and the nanofiltration membrane recovery device is connected with the raw water tank. The utility model discloses a pure water rate of recovery reaches more than 95%, has reduced the waste of water resource.
Description
Technical Field
The utility model relates to a high rate of recovery pure water preparation and dense water recovery plant for lithium cell industry belongs to lithium cell industry technical field.
Background
The lithium battery is widely applied to three fields of electric vehicles, consumer electronics and electrochemical energy storage, and the output of the lithium battery industry is increased year by year in recent years. Water is used as an important component in the production of lithium batteries, and the service life of a storage battery can be shortened due to the fact that the water contains calcium and magnesium ions, solid particles, colloidal substances and other conductive media, so that the requirement of the lithium battery industry on pure water is very strict, the conductivity of the water is generally required to be more than 0.1 mu s/cm (the resistance value is 10 mega ohm), the traditional process for preparing ultrapure water for the batteries adopts cation-anion resin exchange equipment, and the process has the defects that the resin needs to be regenerated frequently after being used for a period of time, the preparation efficiency is influenced, and water pollution can be caused by waste water generated during regeneration.
With the continuous maturity of membrane separation technology, the ultrapure water is prepared by adopting a reverse osmosis filtration process or a first-stage reverse osmosis and then an ion exchange mixed bed (or electrodeionization EDI) process, the water quality can reach 18.2M omega cm, the desalination rate can reach about 99%, and the water recovery rate can reach more than 65%. The process has the defects that about 35 percent of strong brine and flushing water are discharged into a sewage pipeline in the process of preparing pure water, so that not only is huge waste of water resources caused, but also the investment and operation cost of sewage treatment facilities in a factory is increased.
Disclosure of Invention
Problem to above-mentioned prior art exists, the utility model provides a lithium cell trade is with high rate of recovery pure water preparation and dense water recovery plant can reduce the dense water that reverse osmosis processed the emission, improves the rate of recovery, reduces the sewage treatment expense, improves the stability and the high desalination rate of pure water quality of water.
In order to achieve the purpose, the utility model discloses a high recovery rate pure water preparation and concentrated water recovery equipment for lithium battery industry, which comprises a raw water tank, a plurality of filters connected in series, a multistage reverse osmosis device, an EDI device, a variable frequency water supply device, a concentrated water tank and a nanofiltration membrane recovery device;
the raw water tank is connected with a plurality of filters connected in series, the filters are connected with a multi-stage reverse osmosis device, the reverse osmosis device is connected with an EDI device, and the EDI device is connected with a variable-frequency water supply device;
the multistage reverse osmosis device comprises a first-stage reverse osmosis device and a second-stage reverse osmosis device, one end of the first-stage reverse osmosis device is connected with the filter, the other end of the first-stage reverse osmosis device is connected with the second-stage reverse osmosis device, and the second-stage reverse osmosis device is connected with the EDI device;
the one-level reverse osmosis device is connected with the concentrated water tank, the second-level reverse osmosis device is connected with the raw water tank and the concentrated water tank respectively, the concentrated water tank is connected with the nanofiltration membrane recovery device and the filter respectively, and the nanofiltration membrane recovery device is connected with the raw water tank.
As an improvement, the plurality of filters connected in series comprise a multi-media filter, an activated carbon filter and a precision filter which are connected in sequence, and a dosing device is arranged between the activated carbon filter and the precision filter.
As an improvement, pressure transmitters are arranged at the front end and the rear end of the multi-medium filter and the front end and the rear end of the activated carbon filter, and the pressure transmitters are connected with the PLC.
As an improvement, a booster pump is arranged between the raw water tank and the multi-media filter, high-pressure pumps are arranged between the precision filter and the primary reverse osmosis device, between the primary reverse osmosis device and the secondary reverse osmosis device, and a backwashing pump is arranged between the concentrated water tank and the multi-media filter.
As an improvement, pure water tanks are arranged between the first-stage reverse osmosis device and the second-stage reverse osmosis device, between the second-stage reverse osmosis device and the EDI device, and between the EDI device and the variable-frequency water supply device.
As an improvement, the concentrated water tank and each pure water tank are respectively provided with a liquid level sensor, and the liquid level sensors are connected with the PLC.
As the improvement, receive filter membrane recovery unit's entry end and install antisludging agent charge device, receive and be equipped with the dense water sewage pipes on the filter membrane recovery unit.
Compared with the prior art, the utility model discloses a lithium cell trade is with high rate of recovery pure water preparation and dense water recovery plant, beneficial effect is as follows:
1) Concentrated water flowing into the concentrated water tank from the first-stage reverse osmosis device is recycled to the original water tank through the nanofiltration membrane recycling device, the pure water recycling rate of the system reaches more than 95%, waste of water resources is reduced, discharge of salt-containing concentrated water is reduced, and investment and operating cost of sewage treatment facilities are reduced.
2) The filtered tap water is processed by the first-stage reverse osmosis device, the second-stage reverse osmosis device and the EDI device in sequence, the quality of the prepared pure water is highly purified and stable, the water quality can reach 18.2M omega cm, and the pure water preparation efficiency is high and the effect is good.
Drawings
FIG. 1 is a schematic diagram of the principle structure of the present invention;
in the figure: 1. the system comprises a raw water tank, 2, a raw water booster pump, 3, a multi-media filter, 4, an activated carbon filter, 5, a precision filter, 6, a first-stage high-pressure pump, 7, a first-stage reverse osmosis device, 8, a first-stage pure water tank, 9, a second-stage high-pressure pump, 10, a second-stage reverse osmosis device, 11, a second-stage pure water tank, 12, an EDI device, 13, a third-stage pure water tank, 14, a variable-frequency water supply device, 15, a concentrated water tank, 16, a backwashing pump, 17 and a nanofiltration membrane recovery device.
Detailed Description
The following examples are further illustrative of the present invention as to the technical content of the present invention, but the essential content of the present invention is not limited to the following examples, and any simple changes or substitutions based on the essential spirit of the present invention can and should be known to those of ordinary skill in the art, and should fall within the protection scope of the present invention.
It should be noted that the devices and devices adopted in the following of the present invention are all commonly used.
As shown in fig. 1, a high recovery rate pure water preparation and concentrated water recovery device for lithium battery industry comprises a raw water tank 1, a multi-media filter 3, an activated carbon filter 4, a precision filter 5, a first-stage reverse osmosis device 7, a first-stage pure water tank 8, a second-stage reverse osmosis device 10, a second-stage pure water tank 11, an EDI device 12, a third-stage pure water tank 13, a variable frequency water supply device 14, a concentrated water tank 15, a backwashing pump 16 and a nanofiltration membrane recovery device 17;
the raw water tank 1 is connected with a raw water booster pump 2 through a pipeline, the raw water booster pump 2 is connected with a multi-media filter 3 through a pipeline, the multi-media filter 3, an activated carbon filter 4 and a precision filter 5 are sequentially connected in series through a pipeline, and a dosing device capable of adding a scale inhibitor and a reducing agent is connected to the pipeline between the activated carbon filter 4 and the precision filter 5;
the precision filter 5 is connected with a primary high-pressure pump 6 through a pipeline, the primary high-pressure pump 6 is connected with a primary reverse osmosis device 7 through a pipeline, the primary reverse osmosis device 7 is respectively connected with a concentrated water tank 15 through two pipelines, one pipeline is used for discharging concentrated water to the concentrated water tank 15, the other pipeline is used for discharging machine-start washing water to the concentrated water tank 15, the primary reverse osmosis device 7 is connected with a primary pure water tank 8 through a third pipeline, the primary pure water tank 8 is connected with a secondary high-pressure pump 9 through a pipeline, and a dosing device capable of adding alkali to adjust the pH value is connected to the pipeline between the primary pure water tank 8 and the secondary high-pressure pump 9;
the secondary high-pressure pump 9 is connected with a secondary reverse osmosis device 10 through a pipeline, the secondary reverse osmosis device 10 is respectively connected with a concentrated water tank 15 through two pipelines, one pipeline is used for discharging start-stop flushing water to the concentrated water tank 15, the other pipeline is used for discharging unqualified discharge water to the concentrated water tank 15, concentrated water generated by the secondary reverse osmosis device 10 is discharged to the original water tank 1 through a third pipeline, the secondary reverse osmosis device 10 is connected with a secondary pure water tank 11 through a fourth pipeline, the secondary pure water tank 11 is connected with an EDI device 12 through a pipeline, the EDI device 12 is connected with a tertiary pure water tank 13 through a pipeline, the tertiary pure water tank 13 is connected with a variable-frequency water supply device 14 through a pipeline, and the variable-frequency water supply device 14 is used for providing ultrapure water in lithium battery production;
in addition, the concentrated water tank 15 is connected with the backwashing pump 16 through a pipeline, the backwashing pump 16 is connected between the raw water booster pump 2 and the multi-medium filter 3 through a pipeline, the concentrated water tank 15 is connected with the nanofiltration membrane recovery device 17 through a second pipeline, a dosing device capable of adding a scale inhibitor is connected on the pipeline between the concentrated water tank 15 and the nanofiltration membrane recovery device 17, and the nanofiltration membrane recovery device 17 is connected with the raw water tank 1 through a pipeline.
When the device is used, raw water in a raw water tank 1 is pressurized by a raw water booster pump 2 and then sequentially flows through a multi-media filter 3, an activated carbon filter 4 and a precision filter 5, filtered water is pressurized by a primary high-pressure pump 6 and then enters a primary reverse osmosis device 7, concentrated water treated by the primary reverse osmosis device 7 flows into a concentrated water tank 15, obtained primary pure water is pressurized by a secondary high-pressure pump 9 and then enters a secondary reverse osmosis device 10, obtained secondary pure water enters a secondary pure water tank 11 and then continues to enter an EDI device 12 for treatment, and obtained final pure water enters a variable frequency water supply device 14 to be used as ultrapure water for lithium battery production.
As an improvement of the embodiment, the water inlet end of the raw water tank 1 is provided with a water inlet main valve, a Y-shaped filter and a water inlet electric valve, a breather valve, a liquid level sensor and the like are arranged in the raw water tank 1 and connected with a PLC (programmable logic controller) through the liquid level sensor, so that the high-low water level control function is realized, the water inlet electric valve is automatically opened for water supplement when the liquid level is low, and the water inlet electric valve is closed when the liquid level is high. The utility model discloses a raw water be municipal tap water, and water stabilization, the raw water filters behind the silt of large granule through Y type filter, gets into multi-media filter 3 and gets rid of small suspended solid, gets rid of after partial chlorine residue through activated carbon filter 4 again, gets into one-level reverse osmosis unit 7 and falls the raw water conductivity below 10 mus/cm, then falls the one-level pure water conductivity to behind 1 mus/cm through second grade reverse osmosis unit 10 again, falls below 0.1 mus/cm with EDI device 12 with second grade pure water conductivity. The system produces water quality of water stable, reaches the water requirement of lithium cell trade.
As an improvement of the embodiment, pressure transmitters are arranged at the front end and the rear end of the multimedia filter 3 and the activated carbon filter 4, the pressure transmitters are connected with a PLC (programmable logic controller), and the system sets two automatic cleaning modes of continuous use time and pressure difference limit value of the filter through change of the use time and the front-rear pressure difference, so that the normal working state of the filter is maintained, a membrane system in the reverse osmosis device is protected, and membrane pollution is reduced.
As an improvement of the embodiment, the front end of the first-stage high-pressure pump 6 is provided with a low-pressure switch, the rear end of the first-stage high-pressure pump is provided with a high-pressure switch, and when the pressure before the pump is low and the pressure after the pump is high, the operation of the first-stage reverse osmosis device 7 is stopped, so that the effect of protecting the first-stage reverse osmosis device 7 is achieved.
As an improvement of the embodiment, the primary reverse osmosis device 7, the secondary reverse osmosis device 10 and the nanofiltration membrane recovery device 17 are respectively provided with an independent cleaning device, and the system can timely remind the membrane system to be cleaned according to the change of the membrane water yield, so that the flux of the membrane is kept stable.
As an improvement of the embodiment, each medicine adding device has an automatic medicine supplementing function, a stirring and mixing device and a liquid level switch are arranged in each medicine adding device, and a warning is given when the liquid level is low to supplement the added medicine. The adoption of the medicine adding device with the automatic medicine adding function reduces the membrane pollution, keeps the stable water production amount and the stable water quality of the membrane and prolongs the service life of the membrane.
As an improvement of the embodiment, a variable-frequency delivery pump is arranged in the variable-frequency water supply device 14, a pressure transmitter is arranged behind the variable-frequency delivery pump, the set pipe network pressure is controlled by the PLC, the variable-frequency delivery pump automatically starts and stops and adjusts the working frequency according to the change of the pipe network pressure, and the variable-frequency delivery pump automatically sleeps when not used for a long time, so that the timely water consumption of a rear-end user is kept, and the running electricity charge is saved.
As an improvement of the embodiment, the secondary reverse osmosis device 10 is provided with an unqualified discharge system, when the reverse osmosis membrane device is started, unqualified water generated in a short time is automatically discharged to the concentrated water tank 15 for collection, and does not enter the next device, so that the stability of the quality of produced water is ensured.
As an improvement of the embodiment, the primary reverse osmosis device 7, the secondary reverse osmosis device 10 and the nanofiltration membrane recovery device 17 are provided with a start-stop flushing function, and residual concentrated water in the membrane operation is flushed and discharged through the start-stop flushing function, so that the concentrated water is not deposited and scaled in the membrane during the shutdown, and the long-term stable operation of the membrane system is maintained.
As an improvement of the embodiment, a dosing device for adjusting pH is arranged between the primary pure water tank 8 and the secondary high-pressure pump 9, the pH value of the primary pure water is detected according to a pH sensor, when the pH value is lower than a set value, the system starts an alkali dosing pump, and alkali liquor is added into a water inlet pipeline of the secondary reverse osmosis device 10 through a static mixer.
As an improvement of embodiment, receive and contain two-stage nanofiltration membrane system in the membrane recovery unit 17, receive the dense water rate of recovery of membrane recovery unit 17 and reach 90%, enable the utility model discloses an ultrapure water preparation system's strong brine total discharge is less than 5% of design water yield.
As an embodiment improve, the utility model discloses with 7 exhaust dense waters of one-level reverse osmosis unit of retrieving in the dense water tank 15, start to shut down flush water and 10 exhaust start to shut down flush water of second grade reverse osmosis unit, reuse former water tank 1 after receiving filter membrane recovery unit 17 reduction hardness, can make the water more than nearly 35% such as 7 exhaust dense waters of one-level reverse osmosis unit into second grade pure water again like this, make the former water system water yield of system reach about 95%, reverse osmosis unit's water recovery rate has been improved, the waste of water resource has been reduced and the emission that has reduced the salt dense water has been reduced, the investment and the working costs of sewage treatment facility have been reduced.
As an improvement of the embodiment, the back flushing water of the multi-media filter 3 and the activated carbon filter 4 is concentrated water and the like discharged by the first-stage reverse osmosis device 7 recovered by the concentrated water tank 15, and the back flushing is supplemented by tap water in the later stage of the flushing, so that the tap water used for back flushing cleaning is saved, part of the salt-containing water in the concentrated water tank is periodically discharged, the salt content in the water quality of the nanofiltration membrane recovery device 17 is kept from being accumulated, and the good operation of the whole system is kept.
Application example 1
The flow chart of the equipment of the utility model is shown in figure 1, and the designed water yield is 1qm 3 /h；
The raw water tank 1 has the following water inlet: tap water 1.05Qm 3 /h+0.5Qm 3 H nanofiltration membrane recovery device 17 water production +0.25Qm 3 H, concentrated water of the secondary reverse osmosis device 10;
1.8Qm having an electrical conductivity of about 100-200. Mu.s/cm 3 The raw water in the raw water tank 1 is filtered by each filter and then treated by a first-stage reverse osmosis device 7 to be about 0.53Qm 3 The concentrated water is collected into a concentrated water tank 15, and the conductivity is about 1.25Qm of 2-6 mu s/cm 3 The water (first-level pure water) produced by the reaction is fed into a first-level pure water tank 8 and then treated by a second-level reverse osmosis device 10 to be about 0.25Qm 3 The second-stage reverse osmosis concentrated water is recycled to the raw water tank 1, and the conductivity is about 1Qm of 0.5-2 mu s/cm 3 The second-stage produced water per hour is treated by an EDI device 12 and then enters a third-stage pure water tank 13, and finally enters a variable-frequency water supply device 14;
the start-stop flushing water of the first-stage reverse osmosis device 7 and the second-stage reverse osmosis device 10 is about 0.01 qm 3 Perh (total about 0.02 qm of flushing water for starting and stopping the primary reverse osmosis device 7 and the secondary reverse osmosis device 10) 3 And/h) recycled to the concentrate tank 15.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, which is intended to cover any modifications, equivalent substitutions or improvements made within the spirit and scope of the present invention.
Claims (7)
1. A high-recovery-rate pure water preparation and concentrated water recovery device for the lithium battery industry is characterized by comprising a raw water tank (1), a plurality of filters connected in series, a multi-stage reverse osmosis device, an EDI device (12), a variable-frequency water supply device (14), a concentrated water tank (15) and a nanofiltration membrane recovery device (17);
the raw water tank (1) is connected with a plurality of filters connected in series, the filters are connected with a multi-stage reverse osmosis device, the reverse osmosis device is connected with an EDI device (12), and the EDI device (12) is connected with a variable-frequency water supply device (14);
the multistage reverse osmosis device comprises a first-stage reverse osmosis device (7) and a second-stage reverse osmosis device (10), one end of the first-stage reverse osmosis device (7) is connected with the filter, the other end of the first-stage reverse osmosis device is connected with the second-stage reverse osmosis device (10), and the second-stage reverse osmosis device (10) is connected with the EDI device (12);
one-level reverse osmosis unit (7) are connected with dense water tank (15), and second grade reverse osmosis unit (10) still are connected with former water tank (1), dense water tank (15) respectively, and dense water tank (15) are connected with nanofiltration membrane recovery unit (17), filter respectively, nanofiltration membrane recovery unit (17) are connected with former water tank (1).
2. The high-recovery-rate pure water preparation and concentrated water recovery equipment for the lithium battery industry as claimed in claim 1, wherein the plurality of filters connected in series comprise a multi-media filter (3), an activated carbon filter (4) and a precision filter (5) which are connected in sequence, and a dosing device is arranged between the activated carbon filter (4) and the precision filter (5).
3. The high-recovery-rate pure water preparation and concentrated water recovery equipment for the lithium battery industry as claimed in claim 2, wherein pressure transmitters are arranged at the front end and the rear end of the multi-media filter (3) and the front end and the rear end of the activated carbon filter (4), and the pressure transmitters are connected with a PLC (programmable logic controller).
4. The high-recovery-rate pure water preparation and concentrated water recovery equipment for the lithium battery industry as claimed in claim 2, wherein a booster pump is arranged between the raw water tank (1) and the multi-media filter (3), a high-pressure pump is arranged between the precision filter (5) and the primary reverse osmosis device (7), between the primary reverse osmosis device (7) and the secondary reverse osmosis device (10), and a back-wash pump (16) is arranged between the concentrated water tank (15) and the multi-media filter (3).
5. The equipment for preparing pure water with high recovery rate and recovering concentrated water for the lithium battery industry according to claim 2, wherein pure water tanks are arranged between the primary reverse osmosis device (7) and the secondary reverse osmosis device (10), between the secondary reverse osmosis device (10) and the EDI device (12) and between the EDI device (12) and the variable-frequency water supply device (14).
6. The high-recovery pure water preparing and concentrated water recycling device for lithium battery industry as claimed in claim 5, wherein the concentrated water tank (15) and each pure water tank are provided with liquid level sensors, and the liquid level sensors are connected with the PLC controller.
7. The high-recovery-rate pure water preparation and concentrated water recovery equipment for the lithium battery industry as claimed in claim 1, wherein a scale inhibitor dosing device is installed at an inlet end of the nanofiltration membrane recovery device (17), and a concentrated water blowdown pipeline is arranged on the nanofiltration membrane recovery device (17).
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| CN202223305186.0U CN218879665U (en) | 2022-12-09 | 2022-12-09 | High-recovery-rate pure water preparation and concentrated water recovery equipment for lithium battery industry |
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| CN202223305186.0U CN218879665U (en) | 2022-12-09 | 2022-12-09 | High-recovery-rate pure water preparation and concentrated water recovery equipment for lithium battery industry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117023867A (en) * | 2023-08-16 | 2023-11-10 | 杭州科锐环境能源技术有限公司 | Method for degreasing, removing hardness and filtering ternary precursor wastewater and preparing acid and alkali |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117023867A (en) * | 2023-08-16 | 2023-11-10 | 杭州科锐环境能源技术有限公司 | Method for degreasing, removing hardness and filtering ternary precursor wastewater and preparing acid and alkali |
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