CN219792515U - Green co-production device of battery level sodium carbonate and fused salt level sodium nitrate - Google Patents
Green co-production device of battery level sodium carbonate and fused salt level sodium nitrate Download PDFInfo
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- CN219792515U CN219792515U CN202321307228.6U CN202321307228U CN219792515U CN 219792515 U CN219792515 U CN 219792515U CN 202321307228 U CN202321307228 U CN 202321307228U CN 219792515 U CN219792515 U CN 219792515U
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- grade sodium
- sodium carbonate
- battery
- neutralizer
- green
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 title claims abstract description 95
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910000029 sodium carbonate Inorganic materials 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 235000010344 sodium nitrate Nutrition 0.000 title claims abstract description 24
- 239000004317 sodium nitrate Substances 0.000 title claims abstract description 24
- 150000003839 salts Chemical class 0.000 title claims description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 25
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 24
- 230000007062 hydrolysis Effects 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000001704 evaporation Methods 0.000 claims abstract description 14
- 230000008020 evaporation Effects 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 14
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 12
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 11
- 239000012535 impurity Substances 0.000 claims description 8
- 239000012452 mother liquor Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000012295 chemical reaction liquid Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 abstract description 7
- 239000002351 wastewater Substances 0.000 abstract description 7
- 238000012824 chemical production Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 17
- 239000000047 product Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 238000001354 calcination Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Abstract
The utility model discloses a green co-production device for battery-grade sodium carbonate and molten salt-grade sodium nitrate, belongs to the technical field of chemical production, and relates to an industrial sodium carbonate co-production technology; the co-production device comprises a hydrolysis tank, a carbonator tower, a neutralizer and a calciner; the hydrolysis tank is connected with the carbonator, the carbonator is connected with a first centrifuge, the first centrifuge is connected with a neutralizer, the neutralizer is connected with an MVR evaporation crystallizer, the MVR evaporation crystallizer is connected with a centrifugal dryer, and washing liquid generated by the centrifugal dryer is connected with the neutralizer through a first return pipeline; the neutralizer is connected with the MVR evaporation crystallizer through a secondary steam pipeline; sodium bicarbonate produced by the first centrifugal machine is treated by a calciner; the utility model effectively reduces the generation of waste water and waste gas in the production process of the battery-grade sodium carbonate, and simultaneously realizes the joint production of the battery-grade sodium carbonate and the molten salt-grade sodium nitrate.
Description
Technical Field
The utility model belongs to the technical field of chemical production, and relates to an industrial sodium carbonate co-production technology; in particular to a green co-production device for battery-grade sodium carbonate and fused salt-grade sodium nitrate.
Background
Sodium carbonate (commonly known as sodium carbonate) is used as a basic industrial raw material and is divided into two types according to purposes, wherein the type I is special industrial heavy sodium carbonate, and is suitable for manufacturing kinescope glass shells, optical glass and the like; class II is general commercial sodium carbonate, including light sodium carbonate and heavy sodium carbonate. The quality standard of sodium carbonate products implements the national standard (GB 210.1-2004), and the sodium chloride content in the products is less than or equal to 0.30 percent, namely, the sodium carbonate products meet the class I superior product standard. Along with the technical progress, the sodium carbonate production gradually develops to low salt, and the sodium chloride content of heavy sodium carbonate which takes low salt as a dominant product in the industry is as low as 0.20 percent. The rapid development of new energy power and energy storage fields makes the sodium ion battery project in the military, wherein sodium carbonate is one of the most favorable raw materials for manufacturing the positive electrode of the sodium ion battery, has higher requirements on the purity and the content of more than ten impurity ions, and particularly provides a harsh requirement for the content of chloride ions of less than or equal to 0.01 percent. The common sodium carbonate purification methods in the prior art are a chemical precipitation method, a microporous membrane filtration method, a coprecipitation method and a carbonization method, and the purification methods basically stay on a laboratory scale, have the defects of long process, high energy consumption, introduction of impurity ions and the like, are not suitable for industrial production, and have a large amount of waste gas and waste water in the industrial production process, so that the environment is polluted.
The Chinese patent with the application number of 202211415483.2 proposes a method for jointly preparing battery-grade sodium carbonate and food-grade sodium bicarbonate in the soda industry, which directly couples the production method of the battery-grade sodium carbonate and the food-grade sodium bicarbonate with the existing soda industry production system and performs closed production. Has the advantages of short flow, simple and convenient operation, easy industrialization and lower production cost.
Disclosure of Invention
The utility model overcomes the defects of the prior art, provides a green co-production device for battery-grade sodium carbonate and molten salt-grade sodium nitrate, reduces the generation of waste water and waste gas in the production process of the battery-grade sodium carbonate, and simultaneously realizes the joint production of the battery-grade sodium carbonate and the molten salt-grade sodium nitrate.
In order to achieve the above purpose, the present utility model is realized by the following technical scheme.
The green co-production device for the battery-grade sodium carbonate and the molten salt-grade sodium nitrate comprises a hydrolysis tank, a carbonator tower, a neutralizer and a calciner; the hydrolysis tank is connected with the carbonation tower, the discharge port of the carbonation tower is connected with a first centrifugal machine, the liquid outlet of the first centrifugal machine is connected with a neutralizer, the reaction liquid outlet of the neutralizer is connected with an MVR evaporation crystallizer, the MVR evaporation crystallizer is connected with a centrifugal dryer, and the washing liquid generated by the centrifugal dryer is connected with the neutralizer through a first return pipeline; the neutralizer is connected with the MVR evaporation crystallizer through a secondary steam pipeline;
the sodium bicarbonate outlet of the first centrifugal machine is connected with a water scrubber, the discharge port of the water scrubber is connected with a second centrifugal machine, the solid outlet of the second centrifugal machine is connected with the calciner, and the washing liquid generated by the second centrifugal machine is connected with the water scrubber through a second return pipeline; the calciner is connected with the hydrolysis tank through a gas-water pipeline.
Further, the water treatment device also comprises a heater, wherein the heater is connected with a deionized water pipeline, and a water outlet of the heater is connected with the hydrolysis tank.
Further, the calciner is connected with the heater through a gas-water pipeline, and then connected to the hydrolysis tank through the heater.
Further, the heater is connected to the carbonation tower via a conduit.
Further, the hydrolysis tank further comprises a heat preservation filter, wherein the discharge port of the hydrolysis tank is connected to the heat preservation filter firstly and then connected to the carbonation tower through the heat preservation filter.
Further, the liquid outlet of the first centrifugal machine is connected to the neutralizer through the mother liquor tank.
Further, the hydrolysis tank is connected with an industrial sodium carbonate feed inlet and a impurity removing agent feed inlet.
Further, the water scrubber is connected with a deionized water pipeline.
Compared with the prior art, the utility model has the following beneficial effects:
the sodium bicarbonate crystal is washed by deionized water, and is centrifugally dried to prepare sodium bicarbonate, and the generated washing liquid is used as circulating washing water. Calcining sodium bicarbonate in a calciner to remove water and CO 2 To obtain the battery grade sodium carbonate, water and CO generated in the calcining process 2 Returning to the previous working procedure for carbonating; in the process of preparing the battery grade sodium carbonate, no solid waste is generated, and no waste water and gas are generated.
And washing liquid generated by the centrifugation of the carbonated product can be neutralized with dilute nitric acid to prepare sodium nitrate solution, concentrated and crystallized by MVR evaporation equipment, dehydrated by a centrifuge and dried by a dryer to prepare molten salt-grade sodium nitrate. The heat of neutralization reaction is used as a heat source for MVR vaporization equipment, CO 2 The gas is used for carbonating. The whole process flow has no solid waste and waste gas, water and gas in the production process can be recycled, and the secondary heat energy in the reaction is fully utilized.
The utility model effectively reduces the generation of waste water and waste gas in the production process of the battery-grade sodium carbonate, realizes the joint production with molten salt-grade sodium nitrate, and has good social benefit and economic benefit.
Drawings
Fig. 1 is a schematic connection diagram of a green co-production device for battery-grade sodium carbonate and molten salt-grade sodium nitrate.
In the figure, a 1-hydrolysis tank, a 2-carbonation tower, a 3-neutralizer, a 4-calciner, a 5-first centrifuge, a 6-MVR evaporative crystallizer, a 7-centrifugal dryer, an 8-first return line, a 9-secondary steam line, a 10-water scrubber, an 11-second centrifuge, a 12-second return line, a 13-gas water line, a 14-heater, a 15-deionized water line, a 16-heat preservation filter, a 17-mother liquor tank, an 18-industrial soda feed port, a 19-impurity remover feed port and a 20-dilute nitric acid solution line.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. The following describes the technical scheme of the present utility model in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
Referring to fig. 1, the embodiment provides a green co-production device of battery-grade sodium carbonate and molten salt-grade sodium nitrate, which comprises a hydrolysis tank 1, a carbonator tower 2, a neutralizer 3, a calciner 4, a heater 14, a heat preservation filter 16 and a mother liquor tank 17; the heater 14 is used for heating deionized water, the heater 14 is connected with a deionized water pipeline 15, and a water outlet of the heater 14 is connected with the hydrolysis tank 1; while the heater 14 is connected with the carbonator 2 through a pipeline, and the heated deionized water is provided for the hydrolysis tank 1 and the carbonator 2 through the heater 14 to participate in the corresponding reaction.
The hydrolysis tank 1 is connected with an industrial soda feed inlet 18 and a impurity removing agent feed inlet 19, and the discharge outlet of the hydrolysis tank 1 is connected to the heat preservation filter 16 and then connected to the carbonation tower 2 through the heat preservation filter 16. In the above process, dissolving industrial sodium carbonate in deionized water in hydrolysis tank 1 to obtain 45% sodium carbonate solution, adding impurity removing agent to remove impurity, filtering with heat preservation filter 16, pumping filtrate into carbonator 2 with slurry pump, and adding food-grade CO 2 And CO from a post process 2 And (3) performing carbonation reaction, wherein the reaction end point is controlled by the slurry temperature.
The discharge port of the carbonating tower 2 is connected with a first centrifugal machine 5, the liquid outlet of the first centrifugal machine 5 is connected to a neutralizer 3 through a mother liquor tank 17, the neutralizer 3 is connected with a dilute nitric acid solution pipeline 20, sodium nitrate solution generated by the reaction of the neutralizer 3 is sent into an MVR evaporation crystallizer 6 through the reaction liquid outlet of the neutralizer 3, the MVR evaporation crystallizer 6 is connected with a centrifugal dryer 7, and washing liquid generated by the centrifugal dryer 7 is connected with the neutralizer 3 through a first return pipeline 8; the neutralizer 3 is connected with the MVR evaporation crystallizer 6 through a secondary steam pipeline 9; in the process, the main component of the washing liquid discharged by the first centrifugal machine 5 is sodium carbonate solution, sodium nitrate solution is prepared by neutralization reaction of the sodium carbonate solution and dilute nitric acid, concentrated and crystallized by the MVR evaporation crystallizer 6, and then dehydrated and dried by the centrifugal dryer 7 to prepare molten salt-grade sodium nitrate. The heat of neutralization reaction is used as a heat source for the MVR evaporative crystallizer 6, and the washing liquid produced by dehydration in the centrifugal dryer 7 is returned to the neutralizer 3 again to be utilized.
The sodium bicarbonate outlet of the first centrifuge 5 is connected with a water scrubber 10, and the water scrubber 10 is connected with a deionized water pipeline 15. The discharge port of the water scrubber 10 is connected with a second centrifugal machine 11, the solid outlet of the second centrifugal machine 11 is connected with the calciner 4, and the washing liquid generated by the second centrifugal machine 11 is connected with the water scrubber 10 through a second return pipeline 12; the calciner 4 is connected to the heater 14 via the gas-water line 13 and then to the hydrolysis tank 1 via the heater 14. In the process, the carbonator tower 2 prepares sodium bicarbonate crystal slurry, sodium bicarbonate crystals are obtained through separation of the first centrifugal machine 5, the sodium bicarbonate crystals are conveyed to the water washer 10 through the belt conveyor to be washed by deionized water, and are centrifugally dried through the second centrifugal machine 11 to prepare sodium bicarbonate, and washing liquid discharged by the second centrifugal machine 11 is used as circulating washing water. The sodium bicarbonate is calcined by a calciner 4 to remove water and CO 2 And preparing the battery grade sodium carbonate. Water and CO produced during calcination 2 The pre-process is returned for carbonating.
The device of the embodiment fully realizes the recycling of resources in the production process, generates no solid waste and no waste gas, and water, gas and heat energy generated in the production process are all recycled in the production system, thereby having good social and economic benefits.
While the utility model has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art to which the utility model pertains without departing from the scope of the utility model defined by the appended claims.
Claims (8)
1. The green co-production device for the battery-grade sodium carbonate and the molten salt-grade sodium nitrate is characterized by comprising a hydrolysis tank (1), a carbonator tower (2), a neutralizer (3) and a calciner (4); the hydrolysis tank (1) is connected with the carbonation tower (2), a discharge hole of the carbonation tower (2) is connected with the first centrifugal machine (5), a liquid outlet of the first centrifugal machine (5) is connected with the neutralizer (3), a reaction liquid outlet of the neutralizer (3) is connected with the MVR evaporation crystallizer (6), the MVR evaporation crystallizer (6) is connected with the centrifugal dryer (7), and washing liquid generated by the centrifugal dryer (7) is connected with the neutralizer (3) through the first return pipeline (8); the neutralizer (3) is connected with the MVR evaporation crystallizer (6) through a secondary steam pipeline (9);
the sodium bicarbonate outlet of the first centrifugal machine (5) is connected with a water scrubber (10), the discharge port of the water scrubber (10) is connected with a second centrifugal machine (11), the solid outlet of the second centrifugal machine (11) is connected with the calciner (4), and the washing liquid generated by the second centrifugal machine (11) is connected with the water scrubber (10) through a second return pipeline (12); the calciner (4) is connected with the hydrolysis tank (1) through a gas water pipeline (13).
2. The green co-production device for battery-grade sodium carbonate and molten salt-grade sodium nitrate according to claim 1, further comprising a heater (14), wherein the heater (14) is connected with a deionized water pipeline (15), and a water outlet of the heater (14) is connected with the hydrolysis tank (1).
3. The green co-production device of battery-grade sodium carbonate and molten salt-grade sodium nitrate according to claim 2, wherein the calciner (4) is connected to the heater (14) via a gas water line (13) and then to the hydrolysis tank (1) via the heater (14).
4. A green co-production plant of battery grade sodium carbonate and molten salt grade sodium nitrate according to claim 2, characterized in that the heater (14) is connected to the carbonation tower (2) by a pipe.
5. The green co-production device of battery-grade sodium carbonate and molten salt-grade sodium nitrate according to claim 1, further comprising a heat preservation filter (16), wherein the discharge port of the hydrolysis tank (1) is connected to the heat preservation filter (16) first and then connected to the carbonation tower (2) through the heat preservation filter (16).
6. The green co-production plant of battery grade sodium carbonate and molten salt grade sodium nitrate according to claim 1, further comprising a mother liquor tank (17), the liquid outlet of the first centrifuge (5) being connected to the neutralizer (3) via the mother liquor tank (17).
7. The green co-production device of battery-grade sodium carbonate and molten salt-grade sodium nitrate according to claim 1, wherein the hydrolysis tank (1) is connected with an industrial soda feed inlet (18) and a impurity removing agent feed inlet (19).
8. The green co-production device of battery grade sodium carbonate and molten salt grade sodium nitrate according to claim 1, wherein the water scrubber (10) is connected with a deionized water pipeline (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321307228.6U CN219792515U (en) | 2023-05-26 | 2023-05-26 | Green co-production device of battery level sodium carbonate and fused salt level sodium nitrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321307228.6U CN219792515U (en) | 2023-05-26 | 2023-05-26 | Green co-production device of battery level sodium carbonate and fused salt level sodium nitrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219792515U true CN219792515U (en) | 2023-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321307228.6U Active CN219792515U (en) | 2023-05-26 | 2023-05-26 | Green co-production device of battery level sodium carbonate and fused salt level sodium nitrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219792515U (en) |
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2023
- 2023-05-26 CN CN202321307228.6U patent/CN219792515U/en active Active
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