CN115700226A - Method for removing weight of industrial wastewater in production of aluminum-doped cobalt carbonate - Google Patents
Method for removing weight of industrial wastewater in production of aluminum-doped cobalt carbonate Download PDFInfo
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- CN115700226A CN115700226A CN202211448190.4A CN202211448190A CN115700226A CN 115700226 A CN115700226 A CN 115700226A CN 202211448190 A CN202211448190 A CN 202211448190A CN 115700226 A CN115700226 A CN 115700226A
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- Prior art keywords
- cobalt
- supernatant
- storage tank
- carbonate
- aluminum
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- 229910021446 cobalt carbonate Inorganic materials 0.000 title claims abstract description 32
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 12
- 239000006228 supernatant Substances 0.000 claims abstract description 60
- 239000010941 cobalt Substances 0.000 claims abstract description 51
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 51
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000003860 storage Methods 0.000 claims abstract description 38
- 239000002351 wastewater Substances 0.000 claims abstract description 38
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 30
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 30
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 30
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 30
- 239000002893 slag Substances 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910001868 water Inorganic materials 0.000 claims abstract description 21
- 238000005342 ion exchange Methods 0.000 claims abstract description 19
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 16
- 238000005406 washing Methods 0.000 claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 14
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 238000001179 sorption measurement Methods 0.000 claims abstract description 10
- 229910021503 Cobalt(II) hydroxide Inorganic materials 0.000 claims abstract description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 8
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical compound [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 claims abstract description 8
- 238000004062 sedimentation Methods 0.000 claims description 30
- 238000003825 pressing Methods 0.000 claims description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 2
- 230000002194 synthesizing effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 6
- 238000002156 mixing Methods 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- IWRAVVYDORMLAM-UHFFFAOYSA-L C([O-])([O-])=O.[Co+2].[Al+3] Chemical compound C([O-])([O-])=O.[Co+2].[Al+3] IWRAVVYDORMLAM-UHFFFAOYSA-L 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
The invention belongs to the technical field of industrial wastewater weight removal, and discloses a method for removing weight of industrial wastewater in aluminum-doped cobalt carbonate production, which comprises the steps of collecting supernatant with high cobalt content generated by concentrating slurry in the process of synthesizing aluminum-doped cobalt carbonate, adding stirring and internal circulation into a supernatant storage tank, adding slaked lime into the supernatant storage tank for weight removal after the supernatant flows into the storage tank, carrying out a reaction between the slaked lime and ionic cobalt in the supernatant to generate cobalt hydroxide and calcium carbonate, meanwhile, decomplexing the cobalt carbonate and an ammonia nitrogen complex in the supernatant by the slaked lime to precipitate the decomplexed cobalt carbonate, fully reacting the slaked lime with the ionic cobalt and the complex of the cobalt in the supernatant, carbonate ions and the ammonia nitrogen, pumping the mixture into a precipitation tank for precipitation, flowing into a precipitation tank in an overflow mode, pumping into a washing water storage tank, carrying out primary slag blocking through a filter press, intercepting secondary slag through a fine filter, and carrying out adsorption and weight removal through a tertiary ion exchange column to ensure that the cobalt content in the wastewater is less than 0.5mg/L.
Description
Technical Field
The invention relates to the technical field of industrial wastewater weight removal, in particular to a weight removal method for industrial wastewater in aluminum-doped cobalt carbonate production.
Background
The method is characterized in that a mixed solution of ammonium bicarbonate, cobalt chloride and aluminum sulfate is adopted for synthesis reaction, and in the synthesis reaction process, in order to produce the aluminum-doped cobalt carbonate with compact appearance, the slurry needs to be concentrated in the synthesis process. The ionic state cobalt content is high in the supernatant that the concentration produced, can't intercept through blocking sediment equipment and reduce cobalt content in the supernatant, if remove the weight through the ion exchange column, the ion exchange column resin saturation is fast, and backwash regeneration frequency is high, leads to the life of resin short, and backwash regeneration consumes acid-base and pure water volume greatly simultaneously, leads to backwash regeneration with high costs. When the aluminum-doped cobalt carbonate is produced, a large amount of washing water is generated by washing slurry, the cobalt content in the washing water is low, primary slag interception is carried out through a filter press, secondary slag interception is carried out through a fine filter, and trace slag in the washing water is completely intercepted.
Disclosure of Invention
The invention aims to solve the problems of recovery of ionic cobalt in industrial wastewater in the prior art and reduction of high cost caused by removal of high-cobalt wastewater by using an ion exchange column, and provides a method for removing heavy matters from industrial wastewater in aluminum-doped cobalt carbonate production.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for removing the weight of industrial wastewater in the production of aluminum-doped cobalt carbonate comprises the following steps:
step 1, separately collecting supernatant generated in the production of aluminum-doped cobalt carbonate in a supernatant storage tank, wherein the cobalt content in the supernatant is 150mg/L-300mg/L;
step 2, adding stirring and internal circulation in the supernatant storage tank, wherein the stirring speed is 60-70r/min, and the internal circulation flow is 2.5-3m 3 /h；
Step 3, adding slaked lime into the supernatant storage tank and stirring, wherein the ratio of the addition amount of the slaked lime to the supernatant is 13-13.5g/m 3 Stirring for 1 hour;
step 4, pumping mixed liquor of cobalt hydroxide, cobalt carbonate, calcium carbonate and water, which is generated after the slaked lime is mixed with the supernatant, into a sedimentation tank, overflowing the waste water in the sedimentation tank into a sedimentation tank through sedimentation, and reducing the cobalt content of the waste water flowing into the sedimentation tank to 20-30 mg/L;
and 5, pumping the waste water with the cobalt content of 20-30 mg/L in the settling pond into a washing water storage tank through a pump, wherein the cobalt content of the washing water in the washing water storage tank is 15-20 mg/L, intercepting the slag through a filter press and a fine filter, the cobalt content of the waste water after intercepting the slag is 10-15 mg/L, and the cobalt content of the waste water after adsorption and weight removal through a three-stage ion exchange column is 0.25-0.5 mg/L.
And further, in the step 5, filter pressing is firstly carried out by a filter press to block slag, then the slag is blocked by a fine filter, and the mixed wastewater after two-stage slag blocking enters a three-stage ion exchange column for adsorption and weight removal.
And further, after the two parallel first-stage adsorption ion exchange columns adsorb in the step 5, the wastewater flows into the middle box, is pumped into the two parallel second-stage adsorption ion exchange columns from the middle box and then flows into the middle box, and the wastewater in the middle box is pumped into the two parallel third-stage adsorption ion exchange columns through the pump.
Compared with the prior art, the invention has the following beneficial effects:
this patent is for reducing the waste water treatment expense that production mixes aluminium cobalt carbonate production, concentrates the higher supernatant of cobalt content who produces to synthesizing the aluminium cobalt carbonate in-process thick liquids concentration and collects in the supernatant storage tank, installs stirring and inner loop additional in the supernatant storage tank, and after the supernatant flowed into the storage tank, it removed the weight to add quantitative hydrated lime. The hydrated lime reacts with ionic cobalt in the supernatant to generate cobalt hydroxide and calcium carbonate, the hydrated lime decomplexes the cobalt carbonate in the supernatant with an ammonia nitrogen complex compound to precipitate the decomplexed cobalt carbonate, stirring and internal circulation are additionally arranged in a supernatant storage tank due to the high speed of removing weight and settling of the hydrated lime, so that the hydrated lime fully reacts with the ionic cobalt in the supernatant and the complex compound of the cobalt, carbonate ions and ammonia nitrogen, then the hydrated lime is pumped into a precipitation tank to precipitate, the hydrated lime flows into a settling tank in an overflow mode and then is pumped into a washing water storage tank, first-stage slag blocking is carried out through a filter press, second-stage slag blocking is carried out through a fine filter, and then weight is absorbed and removed through a third-stage ion exchange column, so that the cobalt content of the wastewater is less than 0.5mg/l.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1:
step 1, collecting supernatant generated in the production of aluminum-doped cobalt carbonate to 60m separately 3 In the supernatant storage tank, the volume of supernatant collected by the supernatant storage tank is 50m 3 The cobalt content of the aluminum-doped cobalt carbonate supernatant is 300mg/L.
Step 2, adding stirring and internal circulation in the supernatant storage tank, wherein the stirring speed is 60r/min, and the internal circulation flow is 2.5m 3 /h。
And 3, adding slaked lime into the supernatant storage tank and stirring, wherein the adding amount of the slaked lime is 670g, and the stirring time is 1 hour.
Step 4, pumping the mixed solution of cobalt hydroxide, cobalt carbonate, calcium carbonate and water generated after mixing the hydrated lime and the supernatant into a pump with the volume of 100m 3 In the sedimentation tank, the sedimentation tank overflows to a sedimentation tank through sedimentation, the hydrated lime reacts with ionic cobalt and a complex compound to precipitate, and the cobalt content of the wastewater flowing into the sedimentation tank is reduced to 20mg/L.
And 5, pumping the waste water with the cobalt content of 20mg/L in the settling pond into a washing water storage tank through a pump, intercepting the slag through a filter press and a fine filter in two stages, wherein the cobalt content in the waste water after the slag is intercepted is 13.5mg/L, and adsorbing and removing the weight through a three-stage ion exchange column, wherein the cobalt content in the waste water is 0.3mg/L.
Example 2:
step 1, collecting supernatant generated in the production of aluminum-doped cobalt carbonate to 60m separately 3 In the supernatant storage tank, the volume of the supernatant collected by the supernatant storage tank is 50m 3 The cobalt content of the supernatant of the aluminum-doped cobalt carbonate is 200mg/L.
Step 2, adding stirring and internal circulation in the supernatant storage tank, wherein the stirring speed is 65 rpm, and the internal circulation flow is 2.8m 3 /h。
And 3, adding 665g of slaked lime into the supernatant storage tank, and stirring for 1 hour.
Step 4, pumping mixed liquor of cobalt hydroxide, cobalt carbonate, calcium carbonate and water generated after mixing the hydrated lime and the supernatant into a pump with the volume of 100m 3 In the sedimentation tank, the sedimentation tank overflows to a sedimentation tank through sedimentation, the hydrated lime reacts with ionic cobalt and a complex compound to precipitate, and the cobalt content of the wastewater flowing into the sedimentation tank is reduced to 25mg/L.
And 5, passing the waste water with the cobalt content of 25mg/L in the settling pond through a filter and a fine filter to intercept the slag at two stages, wherein the cobalt content in the waste water after the slag is intercepted is 12.5mg/L, and the cobalt content in the waste water is 0.35mg/L after the weight of the waste water is removed through adsorption of a three-stage ion exchange column.
Example 3:
step 1, collecting supernatant generated in the production of aluminum-doped cobalt carbonate to 60m separately 3 In the supernatant storage tank, the volume of supernatant collected by the supernatant storage tank is 50m 3 The cobalt content of the supernatant of the aluminum-doped cobalt carbonate is 150mg/L.
Step 2, adding stirring and internal circulation in the supernatant storage tank, wherein the stirring speed is 70 revolutions per minute, and the internal circulation flow is 3m 3 /h。
And 3, adding 675g of slaked lime into the supernatant storage tank, and stirring for 1 hour.
Step 4, pumping mixed liquor of cobalt hydroxide, cobalt carbonate, calcium carbonate and water generated after mixing the hydrated lime and the supernatant into a pump with the volume of 100m 3 In the sedimentation tank, the sedimentation tank overflows to a sedimentation tank through sedimentation, the hydrated lime reacts with ionic cobalt and a complex compound to precipitate, and the cobalt content of the wastewater flowing into the sedimentation tank is reduced to 30mg/L.
And 5, pumping the waste water with the cobalt content of 30mg/L in the settling pond into a washing water storage tank through a pump, intercepting the slag through a filter press and a fine filter in two stages, wherein the cobalt content in the waste water after intercepting the slag is 15mg/L, and adsorbing and removing the weight through a three-stage ion exchange column, wherein the cobalt content in the waste water is 0.4mg/L.
Example 4:
step 1, collecting supernatant generated in the production of aluminum-doped cobalt carbonate to 60m separately 3 In the supernatant storage tank, the volume of supernatant collected by the supernatant storage tank is 50m 3 The cobalt content of the supernatant of the aluminum-doped cobalt carbonate is 180mg/L.
Step 2, adding stirring and internal circulation in the supernatant storage tank, wherein the stirring speed is 68 revolutions per minute, and the internal circulation flow is 2.8m 3 /h。
And 3, adding 668g of hydrated lime into the supernatant storage tank, and stirring for 1 hour.
Step 4, pumping mixed liquor of cobalt hydroxide, cobalt carbonate, calcium carbonate and water generated after mixing the hydrated lime and the supernatant into a pump with the volume of 100m 3 In the sedimentation tank, the sedimentation tank overflows to a sedimentation tank through sedimentation, the hydrated lime reacts with ionic cobalt and a complex compound to precipitate, and the cobalt content of the wastewater flowing into the sedimentation tank is reduced to 16.5mg/L.
And 5, pumping the waste water with the cobalt content of 16.5mg/L in the settling pond into a washing water storage tank through a pump, intercepting the slag through a filter press and a fine filter in two stages, wherein the cobalt content in the waste water after intercepting the slag is 12.5mg/L, and adsorbing and removing the weight through a three-stage ion exchange column, wherein the cobalt content in the waste water is 0.25mg/L.
Claims (3)
1. A method for removing the weight of industrial wastewater in the production of aluminum-doped cobalt carbonate is characterized by comprising the following steps:
step 1, separately collecting supernate generated in the production of the aluminum-doped cobalt carbonate in a supernate storage tank, wherein the cobalt content in the supernate is 150-300 mg/L;
step 2, adding stirring and internal circulation in the supernatant storage tank, wherein the stirring speed is 60-70r/min, and the internal circulation flow is 2.5-3m 3 /h；
Step 3, adding slaked lime into the supernatant storage tank and stirring, wherein the ratio of the addition amount of the slaked lime to the supernatant is 13-13.5g/m 3 Stirring for 1 hour;
step 4, pumping mixed liquor of cobalt hydroxide, cobalt carbonate, calcium carbonate and water, which is generated after the slaked lime is mixed with the supernatant, into a sedimentation tank, overflowing the waste water in the sedimentation tank into a sedimentation tank through sedimentation, and reducing the cobalt content of the waste water flowing into the sedimentation tank to 20-30 mg/L;
and 5, pumping the waste water with the cobalt content of 20-30 mg/L in the settling pond into a washing water storage tank through a pump, wherein the cobalt content of the washing water in the washing water storage tank is 15-20 mg/L, blocking the slag through a filter press and blocking the slag through a fine filter, the cobalt content of the waste water after the slag is blocked is 10-15 mg/L, and the cobalt content of the waste water is 0.25-0.5 mg/L after the waste water is adsorbed and removed the weight through a three-stage ion exchange column.
2. The method for removing the weight of the industrial wastewater in the production of the aluminum-doped cobalt carbonate as claimed in claim 1, which is characterized in that: and 5, filter pressing and slag blocking through a filter press, blocking slag through a fine filter, and adsorbing and removing weight of the mixed wastewater subjected to two-stage slag blocking in a three-stage ion exchange column.
3. The method for removing the weight of the industrial wastewater in the production of the aluminum-doped cobalt carbonate as claimed in claim 2, which is characterized in that: and (5) after the two parallel primary adsorption ion exchange columns adsorb, allowing the wastewater to flow into an intermediate tank, pumping the wastewater from the intermediate tank into the two parallel secondary adsorption ion exchange columns, and then flowing into the intermediate tank, wherein the wastewater in the intermediate tank is pumped into the two parallel tertiary adsorption ion exchange columns through a pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211448190.4A CN115700226A (en) | 2022-11-18 | 2022-11-18 | Method for removing weight of industrial wastewater in production of aluminum-doped cobalt carbonate |
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| CN202211448190.4A CN115700226A (en) | 2022-11-18 | 2022-11-18 | Method for removing weight of industrial wastewater in production of aluminum-doped cobalt carbonate |
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| CN202211448190.4A Pending CN115700226A (en) | 2022-11-18 | 2022-11-18 | Method for removing weight of industrial wastewater in production of aluminum-doped cobalt carbonate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116477805A (en) * | 2023-05-10 | 2023-07-25 | 苏州登峰环境工程有限公司 | Cobalt sulfamate electroless plating cleaning wastewater zero-emission treatment process |
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