CN210481099U - Recycling treatment device for waste water of recycling waste lithium battery anode material - Google Patents
Recycling treatment device for waste water of recycling waste lithium battery anode material Download PDFInfo
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Abstract
The utility model provides a recycling treatment device for waste water containing waste lithium battery anode material, which is characterized in that the waste water containing heavy metal and high salt mainly contains sodium sulfate and is produced by recycling the waste lithium battery anode material, firstly, liquid alkali, flocculating agent and powdered carbon are added, and calcium, magnesium and heavy metal impurities are filtered by tubular microfiltration; secondly, concentrating sodium sulfate through ultrahigh pressure reverse osmosis, and recycling produced water; and decomposing the sodium sulfate into dilute sulfuric acid and dilute caustic soda by using bipolar membrane electrodialysis, and finally evaporating and concentrating the dilute sulfuric acid and the dilute caustic soda respectively for reuse in production. The utility model discloses can effectively go to the cost of environmental protection and practice thrift raw and other materials purchase expense on, resources are saved, environmental protection for the enterprise obtains benign development.
Description
Technical Field
The utility model relates to a retrieve waste lithium battery cathode material waste water resourceful treatment device belongs to industrial wastewater treatment technical field.
Background
With the rapid development of automobile industry in recent years in China, although gasoline and emission standards used by fuel automobiles are continuously improved, the pollution of automobile exhaust to the environment is continuously increased along with the increase of the automobile usage amount. The electric automobile is a top-end product of modern science and technology, does not discharge harmful gas polluting the atmosphere, and the electric power used by the electric automobile can be obtained from various primary energy sources, so that the electric automobile not only can utilize traditional coal-fired thermal power generation, but also can utilize new energy sources such as nuclear energy, light energy, water power, wind power and the like to generate power, thereby being beneficial to centralized treatment and reducing the pollution problem of thermal power.
In 2018, the market sales volume of the global electric automobiles breaks through 200 thousands of electric automobiles, the sales volume of the Chinese electric automobile brand occupies the leading position again, the total sales volume of the global electric automobiles is close to half of the total sales volume of the global electric automobiles, and the sales volume of the first ten brand manufacturers exceeds 80 thousands of electric automobiles. According to the data published by the China automobile Power alliance, the proportion of the lithium power battery matched with the electric automobile is as follows: the proportion of the ternary battery is six, and the proportion of the lithium iron phosphate battery is four.
Although the electric automobile can solve the exhaust emission problem, in the long-time use of electric automobile, along with power battery's continuous change, can produce a large amount of old and useless lithium cells, if handle improper still can cause great pollution to the environment. Wherein the recycling of the anode material of the waste lithium battery is to realize 'harmlessness, reduction and reclamation', and firstly sulfuric acid (H) is used2SO4) Leaching and purifying soda (Na)2CO3) Removing iron and aluminum by using liquid alkali (NaOH), recovering heavy metals such as nickel, cobalt, manganese and the like by using liquid alkali saponification extraction and sulfuric acid back extraction, and finally recovering metal lithium by using soda ash to precipitate lithium, wherein a large amount of acid and alkali are utilized in the recovery treatment process of the anode material of the waste lithium battery, and a large amount of high-salt wastewater containing heavy metals is generated, so that the treatment difficulty is high. The traditional method is that heavy metals in the wastewater are removed by a heavy metal adsorption bed, and then evaporative crystallization is carried out by an MVR process, so as to directly produce anhydrous sodium sulfate (sodium sulfate decahydrate); during the above process, ifThe anhydrous sodium sulphate is not utilized by matched downstream production, and secondary pollution is easily caused by the accumulation of the anhydrous sodium sulphate; meanwhile, the price of sodium hydroxide is high, the cost for purchasing acid and alkali is high every year, the price of sodium sulfate is low, and the economic benefit of recovery is low. In addition, the invention patent with the patent application number of 201110233487.4 discloses a method for treating high-salinity wastewater in the waste lithium battery recovery industry, the high-salinity wastewater in the waste lithium battery recovery industry is treated through reverse osmosis, the obtained purified water is recycled, the obtained concentrated water is recycled by using natural energy such as solar energy, wind energy and the like to recover salinity in the wastewater, and zero discharge of the wastewater is realized. Although the treatment method and the patent for recovering the waste lithium battery anode material wastewater recover water and sodium sulfate, the purpose of zero discharge of wastewater treatment is achieved, but the offset of the running cost of wastewater treatment is less due to the lower value of the sodium sulfate, and the overall benefit of the wastewater treatment is not ideal.
Disclosure of Invention
The utility model discloses an aim at to retrieve the unsatisfactory problem of waste lithium battery anode material waste water zero release treatment benefit at present, provide a retrieve waste lithium battery anode material waste water resourceful treatment device, will retrieve waste lithium battery anode material waste water and carry out preliminary treatment, superhigh pressure reverse osmosis concentration, then utilize bipolar membrane electrodialysis with Na2SO4Decomposition into dilute NaOH and H2SO4And then respectively utilizing a liquid alkali evaporator and a graphite acid evaporator to carry out dilute NaOH and H2SO4And concentrating and recycling are carried out, so that a large amount of purchasing cost of acid and alkali is saved, and the economic benefit of resource treatment of the waste water of the recycled waste lithium battery anode material is improved.
The technical solution of the utility model is as follows: the recycling treatment device for waste water of the recycled waste lithium battery anode material structurally comprises an adjusting tank, a lifting pump, a reaction tank, a concentration tank, a tubular microfiltration circulating pump, a tubular microfiltration device, a sludge tank, a sludge pump, a sludge dewatering device, a dosing device, an intermediate water tank, a booster pump, an ultrahigh reverse osmosis system, an ultrahigh reverse osmosis water production tank, an external water feeding pump, an acid system circulating tank, an acid system circulating pump, an acid chamber, a salt system circulating tank pump, a bipolar membrane electrodialysis/salt chamber, an alkali system circulating tank, an alkali system circulating pump, an alkali chamber, a stone mill sulfuric acid 3-effect evaporator and a liquid alkali 3-effect evaporator;
wherein the water inlet of the regulating reservoir is connected with sodium sulfate wastewater conveyed by an external pipeline, the water outlet of the regulating reservoir is connected to the water inlet of the reaction reservoir through a lift pump, the medicine outlet of the medicine adding device is connected to the medicine inlet of the reaction reservoir, the water outlet of the reaction reservoir is connected to the water inlet of the concentration reservoir, the mud outlet of the concentration reservoir is connected to the mud inlet of the sludge reservoir, the mud outlet of the sludge reservoir is connected to the mud inlet of the sludge dewatering device through a sludge pump, the sludge dewatering device produces mud cakes, and the filtrate outlet of the sludge dewatering device is connected to the return water inlet of the regulating reservoir;
the water outlet of the concentration tank is connected to the water inlet of the tubular microfiltration device through a tubular microfiltration circulating pump, the circulating water outlet of the tubular microfiltration device is connected to the circulating water inlet of the concentration tank, and the water outlet of the tubular microfiltration device is connected to the water inlet of the middle water tank; the water outlet of the intermediate water tank is connected to the water inlet of the ultrahigh-pressure reverse osmosis system through the booster pump, the water outlet of the ultrahigh-pressure reverse osmosis system is connected to the water inlet of the ultrahigh-pressure reverse osmosis water production tank, the first water inlet of the acid system circulation tank and the first water inlet of the alkali system circulation tank, the ultrahigh-pressure reverse osmosis water production tank sends ultrahigh-pressure reverse osmosis water through the external water pump, and the concentrated water inlet of the ultrahigh-pressure reverse osmosis system is connected to the water inlet of the salt system circulation tank;
a water outlet of the salt system circulation tank is connected to a water inlet of the bipolar membrane electrodialysis/salt chamber through a salt system circulation tank pump, and a salt reflux liquid is sent out from a water outlet of the bipolar membrane electrodialysis/salt chamber to a liquid inlet of a reflux dilute salt liquid of the intermediate water tank; a water outlet of the acid system circulation pool is connected to a water inlet of the acid chamber through the acid system circulation pump, low-concentration sulfuric acid is sent out from a water outlet of the acid chamber to a dilute acid inlet of the stone mill sulfuric acid 3-effect evaporator, first condensed water is sent out from a condensate outlet of the stone mill sulfuric acid 3-effect evaporator to a second water inlet of the acid system circulation pool, and high-concentration sulfuric acid is sent out from a concentrated acid outlet of the stone mill sulfuric acid 3-effect evaporator; and a water outlet of the alkali system circulation tank is connected to a water inlet of the alkali chamber through an alkali system circulation pump, a low-concentration sodium hydroxide is sent out from a water outlet of the alkali chamber to a dilute alkali inlet of the liquid alkali 3-effect evaporator, a condensate outlet of the liquid alkali 3-effect evaporator sends out a second condensate to a second water inlet of the alkali system circulation tank, and a concentrated alkali outlet of the liquid alkali 3-effect evaporator sends out a high-concentration sodium hydroxide.
The utility model aims at the characteristic that the heavy metal-containing high-salt wastewater generated by the recovery treatment of the anode material of the waste lithium battery mainly contains sodium sulfate, firstly, by adding liquid caustic soda, flocculating agent and powdered carbon, calcium, magnesium and heavy metal impurities are filtered by tubular microfiltration; secondly, concentrating sodium sulfate through ultrahigh pressure reverse osmosis, and recycling produced water; and decomposing the sodium sulfate into dilute sulfuric acid and dilute caustic soda by using bipolar membrane electrodialysis, finally evaporating and concentrating the dilute sulfuric acid and the dilute caustic soda respectively for reuse in production, transferring the cost of environmental protection to the aspect of saving raw material purchase cost, really saving resources, protecting the environment and enabling enterprises to obtain benign development.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a waste water recycling treatment device for recycling the anode materials of waste lithium batteries.
FIG. 2 is a water balance diagram of an embodiment of a waste water recycling treatment device for recycling waste lithium battery cathode materials.
In the figure, SSWW represents sodium sulfate wastewater, Cake represents mud Cake, PW represents ultrahigh-pressure reverse osmosis produced water, SB represents salt reflux, and CW represents1Denotes No. 1 condensed Water, CW2Represents 2# condensed water, (LC) H2SO4Low concentration sulfuric acid, low concentration sodium hydroxide (LC) NaOH, and (HC) H2SO4High-concentration sulfuric acid, and (HC) NaOH high-concentration sodium hydroxide; RT represents a reaction tank, CT represents a concentration tank, TMF represents a tubular microfiltration device, SDW represents a sludge dewatering device, DS represents a dosing device, UHPRO represents an ultrahigh-pressure reverse osmosis system, AcR represents an acid chamber, AlR represents an alkali chamber, BPED/SR represents a bipolar membrane electrodialysis/salt chamber, G.3EV represents a millstone sulfuric acid 3-effect evaporator, and 3EV represents a liquid alkali 3-effect evaporator; t is1Denotes a regulating reservoir, P1Indicating lift pump, T2Representing an intermediate pool, P2Showing booster pump, T3Indicating sludge basin, P3Indicating sludge pump, T4Showing an ultrahigh-pressure reverse osmosis water producing pool,P4Indicating external water pump, T5Denotes the acid system circulation tank, P5Showing circulating pump of acid System, T6Showing the circulating pool of the salt system, P6Showing circulating pool pump, T of salt system7Denotes the circulation tank of the alkali system, P7Showing the circulation pump of the alkali system, P8Showing a tubular microfiltration circulating pump.
Detailed Description
The device for recycling the waste water containing the anode material of the waste lithium battery as shown in figure 1 structurally comprises a regulating tank T1Lift pump P1A reaction tank RT, a concentration tank CT and a tubular microfiltration circulating pump P8Tubular micro-filtration device TMF and sludge tank T3And a sludge pump P3A sludge dewatering device SDW, a dosing device DS and a middle water tank T2And a booster pump P2UHPRO and UHP reverse osmosis water producing tank T of ultra-high pressure reverse osmosis system4External water supply pump P4Acid system circulating pool T5Acid system circulating pump P5Acid chamber AcR and salt system circulating pool T6Salt system circulating pool pump P6BPED/salt chamber SR and alkali system circulation pool T for bipolar membrane electrodialysis7Alkali system circulating pump P7An alkali chamber AlR, a stone mill sulfuric acid 3-effect evaporator G.3EV and a liquid alkali 3-effect evaporator 3 EV; wherein the SSWW of the sodium sulfate wastewater is connected into a regulating tank T1Water inlet of (2), regulating reservoir T1The water outlet passes through a lift pump P1A water inlet connected to the reaction tank RT, a medicine outlet of the medicine adding device DS is connected to a medicine inlet of the reaction tank RT, a water outlet of the reaction tank RT is connected to a water inlet of the concentration tank CT, a sludge outlet of the concentration tank CT is connected to a sludge tank T3A sludge inlet and a sludge tank T3The sludge outlet passes through a sludge pump P3A sludge inlet connected to a sludge dewatering device SDW, a sludge Cake Cake produced by the sludge dewatering device SDW, and a filtrate outlet of the sludge dewatering device SDW is connected to a regulating tank T1The water inlet of the backwater and the water outlet of the concentration tank CT pass through a tubular microfiltration circulating pump P8Is connected to the water inlet of the tubular microfiltration device TMF, the circulating water outlet of the tubular microfiltration device TMF is connected to the circulating water inlet of the concentration tank CT, and the water outlet of the tubular microfiltration device TMF is connected to the middle water tank T2A water inlet of (a); intermediate waterPool T2The water outlet of the water pump passes through a booster pump P2Is connected to the water inlet of the ultra-high pressure reverse osmosis system UHPRO, and the water producing port of the ultra-high pressure reverse osmosis system UHPRO is connected to the ultra-high pressure reverse osmosis water producing tank T4Water inlet and acid system circulation tank T 51# water inlet and alkali system circulation tank T 71# water inlet, ultrahigh pressure reverse osmosis water producing tank T4Through an external water pump P4Delivering the ultra-high pressure reverse osmosis produced water PW, connecting the concentrated water port of the ultra-high pressure reverse osmosis system UHPRO to the salt system circulating pool T6A water inlet of (a); salt system circulation tank T6The water outlet of the water pump passes through a salt system circulating pool pump P6Connected to the water inlet of the bipolar membrane electrodialysis BPED/salt chamber SR, and the water outlet of the bipolar membrane electrodialysis BPED/salt chamber SR sends out the salt reflux liquid SB to the intermediate water tank T2A liquid inlet for refluxing dilute salt liquid; acid system circulation tank T5Water outlet of the water pump passes through an acid system circulating pump P5Is connected to the water inlet of the acid chamber AcR, and the water outlet of the acid chamber AcR sends out low-concentration sulfuric acid (LC) H2SO4Sending out 1# condensed water CW to a dilute acid inlet of a stone mill sulfuric acid 3-effect evaporator G.3EV and a condensate outlet of the stone mill sulfuric acid 3-effect evaporator G.3EV1To the acid system circulation tank T5A 2# water inlet of the high-concentration sulfuric acid (HC) H is sent out from a concentrated acid outlet of a stone mill sulfuric acid 3-effect evaporator G.3EV2SO4(ii) a Circulation tank T of alkali system7The water outlet of the alkali system passes through a circulating pump P of the alkali system7Is connected to the water inlet of the alkali chamber AlR, the low-concentration sodium hydroxide (LC) NaOH is sent out from the water outlet of the alkali chamber AlR to the dilute alkali inlet of the liquid alkali 3-effect evaporator 3EV, and the 2# condensed water CW is sent out from the condensate outlet of the liquid alkali 3-effect evaporator 3EV2To the circulation tank T of the alkali system7And a 2# water inlet of the liquid alkali 3-effect evaporator 3EV and a concentrated alkali outlet of the liquid alkali 3-effect evaporator 3EV send out high-concentration sodium Hydroxide (HC) NaOH.
The structure of the ultra-high pressure reverse osmosis system UHPRO comprises a scale inhibitor adding device, a cartridge filter, a high-pressure plunger pump and an ultra-high pressure reverse osmosis device, wherein the scale inhibitor adding device is connected with the cartridge filter, and the cartridge filter is connected with the ultra-high pressure reverse osmosis device through the high-pressure plunger pump; the scale inhibitor is added into the pretreated sodium sulfate wastewater to prevent the ultrahigh pressure reverse osmosis membrane from scaling, the sodium sulfate wastewater sequentially passes through the security filter and the high pressure plunger pump to enter the ultrahigh pressure reverse osmosis device, the ultrahigh pressure reverse osmosis membrane is used for purification and concentration, the concentration of sodium sulfate in the wastewater is concentrated from 5-10% to 12-18% so as to facilitate the subsequent preparation of acid and alkali by the bipolar membrane, the TDS of the ultrahigh pressure reverse osmosis produced water is less than 0.03%, and the sodium sulfate wastewater is reused for production.
The resource treatment method for recycling the waste lithium battery anode material wastewater comprises the following steps:
1) recovering waste lithium battery anode material wastewater (main component sodium sulfate), and removing calcium, magnesium and heavy metal ions through a pretreatment system;
2) concentrating sodium sulfate in the pretreated wastewater through an ultrahigh pressure reverse osmosis system, and recycling produced water;
3) decomposing the sodium sulfate concentrated solution by a bipolar membrane electrodialysis system to prepare dilute sulfuric acid and dilute alkali solution;
4) concentrating the dilute alkali solution by a 3-effect evaporator system for evaporating the dilute alkali;
5) the dilute sulfuric acid solution is concentrated by a graphite 3-effect evaporator system that evaporates dilute acid.
The method comprises the following steps of 1) recovering waste lithium battery anode material wastewater (main component sodium sulfate), adding liquid caustic soda, a flocculating agent and powdered carbon through a pretreatment system, adjusting the pH to 8-10, effectively removing calcium, magnesium and heavy metal ions, and adding sulfuric acid to adjust the pH to 6-8. The concentrated sludge is transported out through dehydration.
And 2) concentrating the concentration of sodium sulfate in the pretreated wastewater from 5-10% to 12-18% through an ultrahigh pressure reverse osmosis system, wherein the TDS of the ultrahigh pressure reverse osmosis produced water is less than 0.03%, and the ultrahigh pressure reverse osmosis produced water is reused for production.
And 3) pumping 12-18% concentrated sodium sulfate solution concentrated by the ultrahigh-pressure reverse osmosis system into a salt chamber of the bipolar membrane electrodialysis system through the bipolar membrane electrodialysis system, adding ultrahigh-pressure reverse osmosis produced water and condensed water into an acid chamber and an alkali chamber of the bipolar membrane electrodialysis system, decomposing the sodium sulfate by using bipolar membrane electrodialysis in a circulating mode, preparing 8-12% dilute sulfuric acid solution in the acid chamber of the bipolar membrane electrodialysis system, preparing 6-10% dilute alkali solution in the alkali chamber of the bipolar membrane electrodialysis system, and simultaneously returning 6-8% sodium sulfate solution generated in the salt chamber of the bipolar membrane electrodialysis system to the front end of the ultrahigh-pressure reverse osmosis system for treatment.
And 4) concentrating 6-10% dilute alkali solution produced by bipolar membrane electrodialysis by a 3-effect evaporator system for evaporating dilute alkali to enable the concentration of the dilute alkali solution to reach 25-32% for recycling in production, wherein the TDS (total dissolved solids) of condensed water is less than 0.01%, and the condensed water is recycled to an alkali circulation tank of the bipolar membrane electrodialysis system.
And 5) concentrating 8-12% dilute sulfuric acid solution produced by bipolar membrane electrodialysis by using a graphite 3-effect evaporator system for evaporating dilute acid to enable the concentration of the dilute sulfuric acid solution to reach 50-65% for recycling in production, wherein the TDS (total dissolved solids) of condensed water is less than 0.03%, and the condensed water is recycled to an acid circulation tank of the bipolar membrane electrodialysis system.
Examples
The technical solution of the present invention is further explained below according to the embodiment.
10000 tons of waste lithium battery anode materials are treated, in the recovery treatment process, firstly sulfuric acid leaching, soda ash deferrization and liquid alkali dealuminization are carried out, then liquid alkali saponification extraction and sulfuric acid back extraction are utilized to recover heavy metals such as nickel, cobalt, manganese and the like, finally soda ash is adopted to precipitate lithium to recover metal lithium, in the recovery treatment process of the waste lithium battery anode materials, on one hand, a large amount of acid and alkali is utilized, enterprises spend more than 5000 ten thousand yuan per year to purchase 32% of liquid alkali and 98% of sulfuric acid in large amount, on the other hand, a large amount of sodium sulfate recovered from high-salinity wastewater containing heavy metals is not easy to be sold, the best method is to directly convert the sodium sulfate in the sodium sulfate wastewater into the liquid alkali and the sulfuric acid for production, the environment-friendly cost is transferred to the saving of raw material purchasing cost, resources are really saved, the environment is protected, the country is benefited, and the enterprises are enabled to. The embodiment is a resource treatment project of the heavy metal-containing high-salinity wastewater matched with the method.
Design of quality of inlet water
The design of the inlet water is from high-salinity wastewater generated by the project of anode materials of waste lithium batteries, and the water quality indexes are as follows:
ND in the table indicates no detection. The waste water mainly comprises the following components: na (Na)+、SO4 2-，Na2SO4The concentration reaches 12.3 percent, and other impurities are less than 0.5 percent.
Design the treated water amount and product index
The system is designed to treat water quantity: 720m3/D（30m3/H）；
The treated reuse water (TDS is less than or equal to 300 mg/L): 545m3/D（22.7m3/H）；
Treated sodium hydroxide (32%): 156T/D (6.5T/H);
treated sulfuric acid (65%): 94T/D (3.9T/H).
Water balance
Refer to the water balance diagram of the waste water recycling device for recycling the anode material of the waste lithium battery in the embodiment of the attached figure 2.
Description of the Process
(1) The method comprises the steps of pressurizing sodium sulfate wastewater by using a raw water pump, feeding caustic soda liquid, a flocculating agent and powdered carbon into a pretreatment system, circularly concentrating and filtering by using a tubular microfiltration membrane under the large-flow circulating state of a circulating pump to remove heavy metals in the wastewater, and then adjusting the pH value back by using sulfuric acid. The concentrated sludge is dewatered by a plate-and-frame filter press, and the sludge cake is transported outside.
(2) The pretreated sodium sulfate wastewater is pressurized by a reverse osmosis booster pump, protected by a reverse osmosis cartridge filter and pressurized by a high-pressure pump, so that 12.3% of the sodium sulfate wastewater is mixed with 8% of sodium sulfate solution generated by bipolar membrane electrodialysis, and then concentrated by ultrahigh pressure reverse osmosis until the mass fraction of sodium sulfate is 16%. The salt content of the reverse osmosis produced water is 0.03 percent, the reverse osmosis produced water is used for producing acid and alkali water, and the rest part is recycled for production.
(3) And the sodium sulfate wastewater is subjected to reverse osmosis concentration to 16% and then enters a bipolar membrane electrodialysis system to prepare acid and alkali. The bipolar membrane electrodialysis system produces a 10% sulfuric acid solution, an 8% sodium hydroxide solution, and an 8% sodium sulfate solution. The 8% sodium sulfate solution produced by the bipolar membrane electrodialysis system is returned to the front end of the reverse osmosis system.
The treatment of the sodium sulfate wastewater adopts a treatment process combining ultrahigh-pressure reverse osmosis and bipolar membrane electrodialysis. The concentration of sodium sulfate in raw water is 12.3 percent, and the flow rate is 30m3and/H enters an ultrahigh pressure reverse osmosis system for concentration, and the ultrahigh pressure reverse osmosis concentrated water with the concentration of 16% of sodium sulfate enters a salt chamber of the bipolar membrane electrodialysis system to prepare a sulfuric acid solution and a sodium hydroxide solution.
Adding reverse osmosis concentrated water into a salt chamber and a polar chamber of the bipolar membrane electrodialysis system, adding reverse osmosis water into an acid chamber and an alkali chamber, preparing acid and alkali by adopting a circulating operation mode, discharging the acid solution in the acid chamber and the alkali solution in the alkali chamber when meeting the requirements of users, and supplementing the reverse osmosis water.
(4) The bipolar membrane electrodialysis produces 8% N aOH solution 26T/H, the concentration of which is low but can generally meet the recycling of the production process, and if higher concentration is required, a 3-effect evaporator of dilute alkali can be adopted to concentrate 8% NaOH solution to 32%. Here, the 8% NaOH solution 26T/H is concentrated to a 32% NaOH solution 6.5T/H.
(5) Bipolar membrane electrodialysis to produce 10% H2SO4The solution is 25.5T/H, the concentration is lower, and 10 percent of H can be treated by a graphite 3-effect evaporator with dilute acid2SO4The solution was concentrated to 65%. Here 10% of H2SO4The solution was concentrated to 65% H at 25.5T/H2SO4Solution 3.9T/H.
System major design parameters
(1) Civil engineering:
(2) the main equipment is as follows:
Claims (2)
1. a recycling treatment device for waste water of recycled waste lithium battery anode materials is characterized by comprising an adjusting tank, a lifting pump, a reaction tank, a concentration tank, a tubular microfiltration circulating pump, a tubular microfiltration device, a sludge tank, a sludge pump, a sludge dewatering device, a dosing device, an intermediate water tank, a booster pump, an ultrahigh reverse osmosis system, an ultrahigh reverse osmosis water production tank, an external water feeding pump, an acid system circulating tank, an acid system circulating pump, an acid chamber, a salt system circulating tank pump, a bipolar membrane electrodialysis/salt chamber, an alkali system circulating tank, an alkali system circulating pump, an alkali chamber, a stone mill sulfuric acid 3-effect evaporator and a liquid alkali 3-effect evaporator;
wherein the water inlet of the regulating reservoir is connected with sodium sulfate wastewater conveyed by an external pipeline, the water outlet of the regulating reservoir is connected to the water inlet of the reaction reservoir through a lift pump, the medicine outlet of the medicine adding device is connected to the medicine inlet of the reaction reservoir, the water outlet of the reaction reservoir is connected to the water inlet of the concentration reservoir, the mud outlet of the concentration reservoir is connected to the mud inlet of the sludge reservoir, the mud outlet of the sludge reservoir is connected to the mud inlet of the sludge dewatering device through a sludge pump, the sludge dewatering device produces mud cakes, and the filtrate outlet of the sludge dewatering device is connected to the return water inlet of the regulating reservoir;
the water outlet of the concentration tank is connected to the water inlet of the tubular microfiltration device through a tubular microfiltration circulating pump, the circulating water outlet of the tubular microfiltration device is connected to the circulating water inlet of the concentration tank, and the water outlet of the tubular microfiltration device is connected to the water inlet of the middle water tank; the water outlet of the intermediate water tank is connected to the water inlet of the ultrahigh-pressure reverse osmosis system through the booster pump, the water outlet of the ultrahigh-pressure reverse osmosis system is connected to the water inlet of the ultrahigh-pressure reverse osmosis water production tank, the first water inlet of the acid system circulation tank and the first water inlet of the alkali system circulation tank, the ultrahigh-pressure reverse osmosis water production tank sends ultrahigh-pressure reverse osmosis water through the external water pump, and the concentrated water inlet of the ultrahigh-pressure reverse osmosis system is connected to the water inlet of the salt system circulation tank;
a water outlet of the salt system circulation tank is connected to a water inlet of the bipolar membrane electrodialysis/salt chamber through a salt system circulation tank pump, and a salt reflux liquid is sent out from a water outlet of the bipolar membrane electrodialysis/salt chamber to a liquid inlet of a reflux dilute salt liquid of the intermediate water tank; a water outlet of the acid system circulation pool is connected to a water inlet of the acid chamber through the acid system circulation pump, low-concentration sulfuric acid is sent out from a water outlet of the acid chamber to a dilute acid inlet of the stone mill sulfuric acid 3-effect evaporator, first condensed water is sent out from a condensate outlet of the stone mill sulfuric acid 3-effect evaporator to a second water inlet of the acid system circulation pool, and high-concentration sulfuric acid is sent out from a concentrated acid outlet of the stone mill sulfuric acid 3-effect evaporator; and a water outlet of the alkali system circulation tank is connected to a water inlet of the alkali chamber through an alkali system circulation pump, a low-concentration sodium hydroxide is sent out from a water outlet of the alkali chamber to a dilute alkali inlet of the liquid alkali 3-effect evaporator, a condensate outlet of the liquid alkali 3-effect evaporator sends out a second condensate to a second water inlet of the alkali system circulation tank, and a concentrated alkali outlet of the liquid alkali 3-effect evaporator sends out a high-concentration sodium hydroxide.
2. The recycling treatment device for the wastewater containing the cathode materials of the waste lithium batteries as claimed in claim 1, wherein the structure of the ultrahigh pressure reverse osmosis system comprises a scale inhibitor adding device, a cartridge filter, a high pressure plunger pump and an ultrahigh pressure reverse osmosis device, wherein the scale inhibitor adding device is connected with the cartridge filter, and the cartridge filter is connected with the ultrahigh pressure reverse osmosis device through the high pressure plunger pump; the sodium sulfate wastewater after pretreatment is firstly added with the scale inhibitor through the scale inhibitor adding device to prevent the ultrahigh pressure reverse osmosis membrane from scaling, and then enters the ultrahigh pressure reverse osmosis device through the cartridge filter and the high pressure plunger pump in sequence to be purified and concentrated by the ultrahigh pressure reverse osmosis membrane.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282786A (en) * | 2019-06-14 | 2019-09-27 | 江苏卓博环保科技有限公司 | Recycle waste lithium cell positive electrode waste water reclaiming processing unit and method |
| CN111892222A (en) * | 2020-07-31 | 2020-11-06 | 龙蟒佰利联集团股份有限公司 | Ammonium sulfate wastewater recycling method |
| CN113213685A (en) * | 2021-04-26 | 2021-08-06 | 萍乡市华星环保工程技术有限公司 | Desulfurization product sulfur recycling treatment process |
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2019
- 2019-06-14 CN CN201920897584.5U patent/CN210481099U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282786A (en) * | 2019-06-14 | 2019-09-27 | 江苏卓博环保科技有限公司 | Recycle waste lithium cell positive electrode waste water reclaiming processing unit and method |
| CN111892222A (en) * | 2020-07-31 | 2020-11-06 | 龙蟒佰利联集团股份有限公司 | Ammonium sulfate wastewater recycling method |
| CN111892222B (en) * | 2020-07-31 | 2023-08-22 | 龙佰集团股份有限公司 | Ammonium sulfate wastewater recycling method |
| CN113213685A (en) * | 2021-04-26 | 2021-08-06 | 萍乡市华星环保工程技术有限公司 | Desulfurization product sulfur recycling treatment process |
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