CN107540142A - The combined treatment process and method of high saliferous reclaimed water in a kind of lead-zinc smelting - Google Patents
The combined treatment process and method of high saliferous reclaimed water in a kind of lead-zinc smelting Download PDFInfo
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- CN107540142A CN107540142A CN201710913182.5A CN201710913182A CN107540142A CN 107540142 A CN107540142 A CN 107540142A CN 201710913182 A CN201710913182 A CN 201710913182A CN 107540142 A CN107540142 A CN 107540142A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The present invention relates to the combined treatment process and method of high saliferous reclaimed water in a kind of lead-zinc smelting, belong to lead-zinc smelting industrial waste water treatment；High saliferous reclaimed water combined treatment process and method by the hard technique of carbon dioxide drop, multi-medium filtering, ultrafiltration, ion exchange depth by dropping hard, the isolated fresh water of electrodialysis high power concentrate and high strong brine successively by caused high saliferous reclaimed water in lead-zinc smelting in described lead-zinc smelting, described fresh water obtains reverse osmosis freshwater and reverse osmosis concentrated water by reverse osmosis deaslination, described high strong brine passes through triple effect evaporation Crystallization Separation, reclaims salt；By the optimum organization of each technique, the advanced treating of high-salt wastewater is realized, while recycles salt, realizes Industrial Wastewater Treatment terminal zero-emission.
Description
Technical field
The invention belongs to lead-zinc smelting industrial waste water treatment, specifically, is related in a kind of lead-zinc smelting high
The combined treatment process and method of saliferous reclaimed water.
Background technology
The environmental protection of lead-zinc smelting enterprise and the problem of complex utilization of the three wastes, be now at present environmental protection departments at different levels and
The focus that society all extremely pays close attention to, the level of pollution control of lead-zinc smelting industrial wastewater is improved, fundamentally realizes waste water zero-emission
Put, it has also become the focus of government and enterprise at present.
Caused waste acid and acid waste water in lead-zinc smelting, high-salt wastewater is obtained after handling early stage, in order to realize zero
Discharge and the comprehensive reutilization of salt, also need to carry out further advanced treating.
Existing wastewater processing technology has filter medium, ultrafiltration, ion exchange, electrodialysis, counter-infiltration etc., but each
Processing mode all has particular/special requirement to water quality treatment, can not realize the scale processing of serialization, and treatment effect is also because of water quality, ring
The difference of the factors such as border, cause result unstable, or even processing equipment is caused because water quality is not up to standard in processing procedure
Damage, unstable due to water quality treatment especially with membrane technology, the dirt that often results in film is stifled, failure.
The content of the invention
In order to overcome problem present in background technology, the invention provides a kind of combination of high-salt wastewater in lead-zinc smelting
Handling process and method, by the optimum organization of each technique, the advanced treating of high-salt wastewater is realized, while recycle salt
Class, realize Industrial Wastewater Treatment terminal zero-emission.
The present invention is achieved through the following technical solutions：
High saliferous reclaimed water combined treatment process and method are by by caused height in lead-zinc smelting in described lead-zinc smelting
Saliferous reclaimed water drops hard, electrodialysis high power by the hard technique of carbon dioxide drop, multi-medium filtering, ultrafiltration, ion exchange depth successively
The isolated fresh water of concentrate and high strong brine, described fresh water obtain reverse osmosis freshwater and reverse osmosis concentrated by reverse osmosis deaslination
Water, described high strong brine pass through triple effect evaporation Crystallization Separation, reclaim salt.
Further, described high saliferous reclaimed water is caused industrial wastewater in Lead-Zinc Sintering Process after processing up to standard
Obtained brine waste, for its total salt content 1%~3%, hardness is 800~1800mg/L, alreadys exceed general counter-infiltration dress
Put and the normal running load of electrodialysis plant, can not effectively carry out water process.
Further, the specific method that hard technique drops in described carbon dioxide is to add carbon dioxide into high saliferous reclaimed water
Gas and sodium hydroxide carry out dropping hard processing, after inclined-plate clarifying basin is efficiently clarified, are reduced to the water hardness in high saliferous
200mg/L, and make water outlet pH be 7~8 using sulfuric acid regulation.Described carbon dioxide intake is 0.3~0.5m3/m3
Water, sodium hydroxide intake are 0.5~0.8Kg/m3Water, it is 10.5~11.5 to drop control system pH in hard processing procedure.Pass through
It is hard for traditional sodium carbonate method drop using the hard technology generations of drop of hydrogenation of carbon dioxide sodium oxide molybdena, drop and be not further added by hard process in water
Salt content, make the treatment conditions for meeting subsequent technique by dropping the water quality handled firmly.
Further, filter medium is quartz sand and activated carbon granule used by described multi-medium filtering, its component
Ratio is 1：1, the impurity such as small suspension, particulate matter and the colloid in water are removed by media filtration, are less than or equal to SDI values
5。
Further, milipore filter is hollow-fibre membrane used by described ultrafiltration technology, and it is micro- that nominal pore is less than 0.01
Rice, drop molecular weight are more than the particulate removal of 500 dalton, particle diameter more than 10 nanometers, are less than the SDI values after hyperfiltration treatment
Equal to 3.
Further, hard technique drops in described ion exchange depth, and used ion exchange resin is sodium form cation
Exchanger resin, can be efficiently by the Ca in water2+、Mg2+Cement out, hardness is down to below 20mg/L.Described ion
Exchanger resin need to periodically carry out regeneration treatment, and regeneration frequency is 3~4 weeks/time, and renovation process is first uses 5% hydrochloric acid solution
Pickling, then carry out ion exchange resin conversion with 5% sodium hydroxide solution.
Further, described electrodialysis high power extracting and concentrating technology is two-stage electrodialysis plant tandem working pattern, and one-level is electric
Electrodialysis apparatus rated voltage 150V, rated current 100A, two level electrodialysis rated voltage 200V, rated current 150A, make by
Electrodialysis high power concentrate produces fresh water salt content below 0.3%, high strong brine salt content more than 12%.
Further, the reverse osmosis freshwater obtained after reverse osmosis deaslination is handled, its electrical conductivity 100us/cm with
Under, below Na ion concentration 50mg/L, it can be used as and produce new Water circulation, obtained reverse osmosis concentrated water returns to electrodialysis circulation and carried
It is dense.
Further, described triple effect evaporation crystallization separation process, control I 90~110 DEG C of evaporating temperatures of effect, pressure -10
~10Kpa, II 70~80 DEG C of evaporating temperature of effect, pressure -20~-30Kpa, III 40~60 DEG C of evaporating temperature of effect, pressure -40~-
50Kpa.Sodium sulphate and sodium chloride is crystallized and is separated out by triple effect evaporation crystallization, the anhydrous sulphur of industry is obtained after centrifugal drying is packed
Sour sodium and industrial chlorinations sodium, evaporation gained condensed water, which can be used as, produces new Water circulation.
This beneficial effect invented in fact：The present application drops hard technique using carbon dioxide and substitutes conventional traditional sodium carbonate
Hard technique drops in method, it is continuous, stably, efficiently reduce original water hardness while raw water salt content is no longer significantly increased, while significantly
It is cost-effective；And closed according to the respective technology efficiency of the techniques such as filter medium, ultrafiltration, ion exchange, electrodialysis, counter-infiltration
Reason sufficiently combination, it is high saliferous reclaimed water is carried out into high power concentrate to while producing concentrated water salt content more than 12%, making
System produces reverse osmosis freshwater electrical conductivity and drops to below 100us/cm, as new Water circulation is produced in production fire fighting water system, realizes
Industrial Wastewater Treatment terminal zero-emission；Because the cycles of concentration of electrodialysis system is up to more than 7 times, at electrodialysis high power concentrate
Water after reason carries out reverse osmosis deaslination and the triple effect evaporation Crystallization Separation of next step again, can substantially reduce triple effect evaporation crystallization point
The investment of separating process and operating cost；The combined treatment process and method of whole high saliferous reclaimed water, technique is simple, and operation is just
Victory, each processing section is according to own characteristic and requires to cooperate, synergy, makes the water stabilization of water obtained by processing and can return
Salinity contained by utilizing is received, realizes water process terminal zero-emission.
Brief description of the drawings
Fig. 1 is the combined treatment process of high saliferous reclaimed water and the process chart of method in a kind of lead-zinc smelting
Embodiment
Below in conjunction with embodiments of the invention and Figure of description, the technical scheme in the embodiment of the present invention is carried out clear
Chu, it is fully described by, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments,
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained all under the premise of creative work is not made
Other embodiments, belong to the scope of protection of the invention.
Embodiment 1
The combined treatment process and method of high saliferous reclaimed water, its concrete technical scheme are as follows in a kind of lead-zinc smelting：
The high saliferous reclaimed water that caused industrial wastewater in Lead-Zinc Sintering Process is obtained after processing up to standard, passes through successively
Hard, the isolated fresh water of electrodialysis high power concentrate drops in the hard technique of carbon dioxide drop, multi-medium filtering, ultrafiltration, ion exchange depth
With high strong brine, described fresh water obtains reverse osmosis freshwater and reverse osmosis concentrated water, described high strong brine by reverse osmosis deaslination
By triple effect evaporation Crystallization Separation, salt is reclaimed.
The specific method that hard technique drops in described carbon dioxide is that carbon dioxide and hydrogen are added into high saliferous reclaimed water
Sodium oxide molybdena, carbon dioxide intake are 0.3m3/m3Water, sodium hydroxide intake are 0.5Kg/m3Water, it is 10.5 to control pH,
Drop is handled after inclined-plate clarifying basin is efficiently clarified firmly, makes water outlet pH be 7 using sulfuric acid regulation.
Filter medium is quartz sand and activated carbon granule used by described multi-medium filtering, and its component ratio is 1：1,
SDI values are made to be less than or equal to 5 after processing.
Milipore filter is hollow-fibre membrane used by described ultrafiltration technology, is less than the SDI values after hyperfiltration treatment
Equal to 3.
Hard technique drops in described ion exchange depth, and used ion exchange resin is sodium form cationic ion-exchange resin,
Hardness is set to be down to below 20mg/L.
Described electrodialysis high power extracting and concentrating technology is two-stage electrodialysis plant tandem working pattern, one-level electrodialysis plant volume
Determine voltage 150V, rated current 100A, two level electrodialysis rated voltage 200V, rated current 150A, make by electrodialysis high power
Concentrate produces fresh water salt content below 0.3%, high strong brine salt content more than 12%.
The reverse osmosis freshwater obtained after reverse osmosis deaslination is handled is as the new Water circulation of production, obtained reverse osmosis concentrated water
Return to electrodialysis juice circulation.
Described triple effect evaporation crystallization separation process, control I 90 DEG C of evaporating temperatures of effect, pressure -10Kpa, II effect evaporation temperature
70 DEG C of degree, pressure -20Kpa, III 40 DEG C of evaporating temperature of effect, pressure -40Kpa.Make sodium sulphate and chlorination by triple effect evaporation crystallization
Sodium crystallization is separated out, and industrial anhydrous sodium sulfate and industrial chlorinations sodium are obtained after centrifugal drying is packed, and evaporation gained condensed water can be made
To produce new Water circulation.
Detection is sampled to each process section in processing procedure, as a result such as table 1
Table 1
After processing by the present invention, gained reverse osmosis freshwater and the triple effect evaporation condensation water hardness≤20mg/L, electrical conductivity
≤ 100us/cm, salt content≤0.005%, it can be directly used as producing new water, realize the zero-emission of sewage.
Embodiment 2
The combined treatment process and method of high saliferous reclaimed water, its concrete technical scheme are as follows in a kind of lead-zinc smelting：
The high saliferous reclaimed water that caused industrial wastewater in Lead-Zinc Sintering Process is obtained after processing up to standard, passes through successively
Hard, the isolated fresh water of electrodialysis high power concentrate drops in the hard technique of carbon dioxide drop, multi-medium filtering, ultrafiltration, ion exchange depth
With high strong brine, described fresh water obtains reverse osmosis freshwater and reverse osmosis concentrated water, described high strong brine by reverse osmosis deaslination
By triple effect evaporation Crystallization Separation, salt is reclaimed.
The specific method that hard technique drops in described carbon dioxide is that carbon dioxide and hydrogen are added into high saliferous reclaimed water
Sodium oxide molybdena carries out dropping hard processing, after inclined-plate clarifying basin is efficiently clarified, the water hardness in high saliferous is reduced to 200mg/L, and
Water outlet pH is set to be 7.5 using sulfuric acid regulation.Described carbon dioxide intake is 0.4m3/m3Water, sodium hydroxide intake
For 0.6Kg/m3Water, it is 11 to drop control system pH in hard processing procedure.
Filter medium is quartz sand and activated carbon granule used by described multi-medium filtering, and its component ratio is 1：1,
SDI values are made to be less than or equal to 5 after processing.
Milipore filter is hollow-fibre membrane used by described ultrafiltration technology, is less than the SDI values after hyperfiltration treatment
Equal to 3.
Hard technique drops in described ion exchange depth, and used ion exchange resin is sodium form cationic ion-exchange resin.
Described electrodialysis high power extracting and concentrating technology is two-stage electrodialysis plant tandem working pattern, one-level electrodialysis plant volume
Determine voltage 150V, rated current 100A, two level electrodialysis rated voltage 200V, rated current 150A, make by electrodialysis high power
Concentrate produces fresh water salt content below 0.3%, high strong brine salt content more than 12%.
The reverse osmosis freshwater obtained after reverse osmosis deaslination is handled, as new Water circulation is produced, what is obtained is reverse osmosis concentrated
Water returns to electrodialysis juice circulation.
Described triple effect evaporation crystallization separation process, control I 100 DEG C of evaporating temperatures of effect, pressure 2Kpa, II effect evaporating temperature
75 DEG C, pressure -25Kpa, III 50 DEG C of evaporating temperature of effect, pressure -45Kpa.Make sodium sulphate and sodium chloride by triple effect evaporation crystallization
Crystallization separates out, and industrial anhydrous sodium sulfate and industrial chlorinations sodium is obtained after centrifugal drying is packed, evaporation gained condensed water can conduct
Produce new Water circulation.Detection is sampled to each process section in processing procedure, as a result such as table 2：
Table 2
After processing by the present invention, gained reverse osmosis freshwater and the triple effect evaporation condensation water hardness≤20mg/L, electrical conductivity
≤ 100us/cm, salt content≤0.005%, it can be directly used as producing new water, realize the zero-emission of sewage.
Embodiment 3
The combined treatment process and method of high saliferous reclaimed water, its concrete technical scheme are as follows in a kind of lead-zinc smelting：
The high saliferous reclaimed water that caused industrial wastewater in Lead-Zinc Sintering Process is obtained after processing up to standard, passes through successively
Hard, the isolated fresh water of electrodialysis high power concentrate drops in the hard technique of carbon dioxide drop, multi-medium filtering, ultrafiltration, ion exchange depth
With high strong brine, described fresh water obtains reverse osmosis freshwater and reverse osmosis concentrated water, described high strong brine by reverse osmosis deaslination
By triple effect evaporation Crystallization Separation, salt is reclaimed.
The specific method that hard technique drops in described carbon dioxide is that carbon dioxide and hydrogen are added into high saliferous reclaimed water
Sodium oxide molybdena carries out dropping hard processing, after inclined-plate clarifying basin is efficiently clarified, the water hardness in high saliferous is reduced to 200mg/L, and
Water outlet pH is set to be 8 using sulfuric acid regulation.Described carbon dioxide intake is 0.5m3/m3Water, sodium hydroxide intake are
0.8Kg/m3Water, it is 11.5 to drop control system pH in hard processing procedure.
Filter medium is quartz sand and activated carbon granule used by described multi-medium filtering, and its component ratio is 1：1,
SDI values are made to be less than or equal to 5 after processing.
Milipore filter is hollow-fibre membrane used by described ultrafiltration technology, is less than the SDI values after hyperfiltration treatment
Equal to 3.
Hard technique drops in described ion exchange depth, and used ion exchange resin is sodium form cationic ion-exchange resin.
Described electrodialysis high power extracting and concentrating technology is two-stage electrodialysis plant tandem working pattern, one-level electrodialysis plant volume
Determine voltage 150V, rated current 100A, two level electrodialysis rated voltage 200V, rated current 150A, make by electrodialysis high power
Concentrate produces fresh water salt content below 0.3%, high strong brine salt content more than 12%.
The reverse osmosis freshwater obtained after reverse osmosis deaslination is handled, as new Water circulation is produced, what is obtained is reverse osmosis concentrated
Water returns to electrodialysis juice circulation.
Described triple effect evaporation crystallization separation process, control I 110 DEG C of evaporating temperatures of effect, pressure 10Kpa, II effect evaporation temperature
80 DEG C of degree, pressure -30Kpa, III 60 DEG C of evaporating temperature of effect, pressure -50Kpa.Make sodium sulphate and chlorination by triple effect evaporation crystallization
Sodium crystallization is separated out, and industrial anhydrous sodium sulfate and industrial chlorinations sodium are obtained after centrifugal drying is packed, and evaporation gained condensed water can be made
To produce new Water circulation.Detection is sampled to each process section in processing procedure, as a result such as table 2：
Table 2
After processing by the present invention, gained reverse osmosis freshwater and the triple effect evaporation condensation water hardness≤20mg/L, electrical conductivity
≤ 100us/cm, salt content≤0.005%, it can be directly used as producing new water, realize the zero-emission of sewage.
Finally illustrating, preferred embodiment above and accompanying drawing are merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention has been described in detail by above preferred embodiment, it is to be understood by those skilled in the art that
Various changes, the model limited without departing from claims of the present invention can be made to it in the form and details
Enclose.
Claims (10)
1. the combined treatment process and method of high saliferous reclaimed water in a kind of lead-zinc smelting, it is characterised in that：Described lead-zinc smelting
Middle high saliferous reclaimed water combined treatment process and method by passing through titanium dioxide successively by caused high saliferous reclaimed water in lead-zinc smelting
Hard hard technique, multi-medium filtering, ultrafiltration, ion exchange depth drop, the isolated fresh water of electrodialysis high power concentrate and highly concentrated drop in carbon
Salt solution, described fresh water obtain reverse osmosis freshwater and reverse osmosis concentrated water by reverse osmosis deaslination, and described high strong brine passes through three
Evaporative crystallization separation is imitated, reclaims salt.
2. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 1
It is：Described high saliferous reclaimed water is that the saliferous that caused industrial wastewater obtains after processing up to standard in Lead-Zinc Sintering Process gives up
Water, for its total salt content 1% ~ 3%, hardness is 800 ~ 1800 mg/L.
3. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 1
It is：The specific method that hard technique drops in described carbon dioxide is that carbon dioxide and hydroxide are added into high saliferous reclaimed water
Sodium carries out dropping hard processing, after inclined-plate clarifying basin is efficiently clarified, the water hardness in high saliferous is reduced to 200 mg/L, and use
Sulfuric acid adjusts its pH to 7 ~ 8.
4. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 1
It is：Filter medium is quartz sand and activated carbon granule used by described multi-medium filtering, and its component ratio is 1：1, warp
Crossing media filtration makes SDI values be less than or equal to 5.
5. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 1
It is：Milipore filter is hollow-fibre membrane used by described ultrafiltration technology, and nominal pore is less than 0.01 micron, made by ultrafiltration
SDI values after processing are less than or equal to 3.
6. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 1
It is：Hard technique drops in described ion exchange depth, by ion exchange depth drop hard processing make hardness be down to 20 mg/L with
Under.
7. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 1
It is：Described electrodialysis high power extracting and concentrating technology is two-stage electrodialysis plant tandem working pattern, and one-level electrodialysis plant is specified
Voltage 150V, rated current 100A, two level electrodialysis rated voltage 200V, rated current 150A, make to carry by electrodialysis high power
Dense produced fresh water salt content is below 0.3%, high strong brine salt content more than 12%.
8. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 1
It is：The reverse osmosis freshwater obtained after reverse osmosis deaslination is handled returns as new Water circulation, obtained reverse osmosis concentrated water is produced
Telegram in reply dialysis juice circulation.
9. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 1
It is：Described triple effect evaporation crystallization separation process, control I 90 ~ 110 DEG C of evaporating temperatures of effect, the Kpa of pressure -10 ~ 10, II effect are steamed
Send out 70 ~ 80 DEG C of temperature, the Kpa of pressure -20 ~ -30, III 40 ~ 60 DEG C of evaporating temperature of effect, the Kpa of pressure -40 ~ -50.
10. the combined treatment process and method of high saliferous reclaimed water, its feature in a kind of lead-zinc smelting according to claim 6
It is：Described ion exchange resin periodically carries out regeneration treatment, and regeneration frequency is 3 ~ 4 weeks/time, and renovation process is first using 5%
Hydrochloric acid solution pickling, then carry out ion exchange resin conversion with 5% sodium hydroxide solution.
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| CN113816526A (en) * | 2021-09-18 | 2021-12-21 | 武汉钢铁有限公司 | Water quenching water recycling treatment process for cold rolling continuous annealing unit |
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| CN113816526A (en) * | 2021-09-18 | 2021-12-21 | 武汉钢铁有限公司 | Water quenching water recycling treatment process for cold rolling continuous annealing unit |
| CN113816526B (en) * | 2021-09-18 | 2023-02-28 | 武汉钢铁有限公司 | Water quenching water recycling treatment process for cold rolling continuous annealing unit |
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