CN102897947A - Reverse osmosis (RO) desalting treatment method and treatment system with ultrahigh water recovery rate for waste water containing high sulfate radicals - Google Patents
Reverse osmosis (RO) desalting treatment method and treatment system with ultrahigh water recovery rate for waste water containing high sulfate radicals Download PDFInfo
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- CN102897947A CN102897947A CN2012103711788A CN201210371178A CN102897947A CN 102897947 A CN102897947 A CN 102897947A CN 2012103711788 A CN2012103711788 A CN 2012103711788A CN 201210371178 A CN201210371178 A CN 201210371178A CN 102897947 A CN102897947 A CN 102897947A
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- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention provides an RO desalting treatment method and a treatment system with an ultrahigh water recovery rate for waste water containing high sulfate radicals. The treatment method and the treatment system are applied to waste water with the content of sulfate radicals larger than 200mg/l. The treatment method includes the steps of subjecting the waste water containing high sulfate radicals to cation exchange through the ion exchange method; and subjecting the waste water containing high sulfate radicals after the cation exchange to RO treatment to enable the RO recovery rate to be larger than 85%. According to the method and the system, the ion exchange method is applied to the pretreatment process before RO, scaling effects of sulfate radical anions are controlled indirectly through control of easily scaling cations corresponding to the sulfate radicals, the exchange capacity is high, the cost is low, and the RO water recovery rate can be improved to more than 85%.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment and treatment system, relate in particular to a kind of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method and treatment system.
Background technology
At present, the water treatment desalting technology mainly contains the techniques such as distillation method, embrane method, electrodialysis, electric desalination, ion exchange method, and every kind of technique has its Application Areas and relative merits.
Distillation method be applied to the earliest sea water desaltination, since this method require to provide thermal source (steam), the shortcomings such as cost of investment height, application is restricted; Electrodialysis and electric desalination are owing to the factor ranges of application such as water producing cost is high, and desalting efficiency is low are not extensive yet; Ion exchange method is a kind of efficient desalting treatment technology, and along with the increase of amberlite lipid species, desalination is used quite extensive, but ion exchange method need to consume regenerative agent, as, acid, alkali, salt etc. produce regeneration waste liquid simultaneously--spent acid, salkali waste etc.; Embrane method reverse osmosis (RO) Demineralized Water Production technology is the new type water treatment technology that grows up over nearly more than 30 years, embrane method reverse osmosis desalination technique is owing to be to make the water opposite side that the ion in the water is trapped within film by semi-permeable membranes reach separating of solvability salt in water and the water by pressure-driven, whole process is without phase transformation, normal temperature, do not need thermal source, regenerative agent, ratio of desalinization can reach more than 97%, and it is more and more extensive that these advantages are used embrane method reverse osmosis desalination technology.But the conventional water rate of recovery of this desalting technology is no more than 75%, and the utilization ratio of water is low to be the very large shortcoming of this desalting technology, how to improve the problem that the reverse osmosis water rate of recovery is the water treatment worker always.
The water rate of recovery that affects embrane method reverse osmosis desalination technique is main relevant with the reverse osmosis desalination principle.Reverse osmosis membrane is a kind of semi-permeable membranes, sees through film and ion is trapped within the opposite side of film by pressure-driven water.Fig. 1 is conventional reverse osmosis system flow setting figure.As shown in Figure 1, conventional reverse osmosis system comprises high-pressure pump 101, first paragraph reverse osmosis unit 102 and two sections reverse osmosis units 103.High-pressure pump 101 is arranged on before one section reverse osmosis unit 102, and brine waste I enters two sections reverse osmosis units 103 after processing through one section reverse osmosis unit, carries out the secondary counter osmotic treated.Afterwards the product water I1 after the reverse osmosis is collected, dense water I2 is discharged.Salt is relevant with the rate of recovery of water in the concentration of the opposite side of film in the water, that is to say, when the water rate of recovery 75%, salt has been concentrated 4 times in a side of film, when the water rate of recovery brought up to 85%, salt had been concentrated 6.67 times in a side of film, and the concrete water rate of recovery and salt concentration rate relation see the following form:
| Sequence number | The water rate of recovery | The salt concentration rate |
| 1 | 75% | 4 |
| 2 | 85% | 6.67 |
| 3 | 90% | 10 |
| 4 | 95% | 20 |
As can be seen from the above table, along with the raising of the water rate of recovery, the non-linear increase of salt concentration rate that is to say, when the water rate of recovery brings up to 90% from 85%, improved 5%, the salt concentration rate has improved 3.33, but brings up to 95% from 90%, still improve 5%, but the salt concentration rate has improved 10, and when the reverse osmosis water rate of recovery is higher, salt is concentrated denseer.
Conventional water intermediate ion dissolving is affected by ion content, and the ion of easy fouling has Ca in the general conventional water
2+, CO
3 2-, Mg
2+, SO
4 2-, etc. divalent cation and dianion, these ions can crystallize out in the salt concentration side absorption of reverse osmosis membrane and be attached to the reverse osmosis membrane surface, make reverse osmosis membrane fouling, scale forming matter has hindered the passage that reverse osmosis water passes through, reverse osmosis membrane can't normally move, Here it is why conventional reverse osmosis can't reach the factor of the high water rate of recovery.
Except fouling, PH also is the factor that affects the reverse osmosis water rate of recovery, and major cause is the solubleness that PH affects easy scale-forming ion, and along with the increase of PH, easily scale-forming ion solubleness reduces, and the ion fouling also is attached on the reverse osmosis membrane, and the water rate of recovery reduces.
In order to improve the reverse osmosis desalination technology water rate of recovery, generally commonly use following method:
1, reduces the pH value of feed water by reverse osmosis in the water inlet acid adding of carrying out reverse osmosis process, prevent CaCO
3, MgCO
3The fouling of class carbanion.
2, add Scale inhibitors at the water inlet that carries out reverse osmosis process, Scale inhibitors is a kind of water quality dispersion agent, and this material can improve by dispersion mechanism the solubleness of certain or certain class indissoluble salt, thereby improves reverse osmosis concentrated water side salt density, improves the rate of recovery of water.
3, remove easy scale-forming ion, such as the hardness in the employing lime-soda method reduction water, thereby obtain the high water rate of recovery of reverse osmosis.
The first two kind method is under the conventional reverse osmosis water quality mal-condition, be used for the conventional measure that prevents the reverse osmosis fouling, this method only can solve subproblem after using, that is to say, the efficient of Scale inhibitors can't reach and suppress scale inhibition to more than 6.67 times of solubleness, and acid-adding method only can solve part carbonate hardness scale problems, can't guarantee that the reverse osmosis water rate of recovery will reach more than 85%.
The third method lime-soda method is chemical method for dosing medicine, and principle is to utilize lime to reduce carbonate hardness in the water, utilize the permanent hardness in the soda ash attenuating water, but this method is prerequisite by theoretical complete reaction, is at PH, CaCO at 10.8 o'clock
3Solubleness is 30mg/l, Mg (OH)
2Solubleness be 10mg/l, then residual harness (take calcium carbonate) is 47mg/l, when water being adjusted between the neutrality (6-8.5), solubleness can slightly increase.This method has only solved part carbonate hardness problem, but residual harness is too high, reckons without to contain certain sulfate radical content (generally being higher than 200mg/l) in the water, in this case on the impact of high water rate of recovery reverse osmosis.
Sulfate radical content can solve by several approach greater than the impact on the reverse osmosis water rate of recovery of the high sulfate radical content waste water of 200mg/l:
1, will pass through reverse osmosis desalination after the sulfate radical removal, this method is direct method again, is about to influence factor and removes.The method of this removal sulfate radical can adopt the methods such as sodium filter method, ion exchange method.
2, further remove hardness in the water, residual harness in the water is reduced to the needs that satisfy the reverse osmosis concentration multiplying power, thereby reach the purpose that the reverse osmosis water rate of recovery is improved.This method is indirect method.The method of hardness has sodium filter method, ion exchange method etc. in this removal water.
Well-knownly be, after using the method for sodium filter in above-mentioned two kinds of methods, the water rate of recovery still is subjected to the impact of the concentrated fouling of water intermediate ion, the water rate of recovery can not be high, and the ion exchange method of using in the prior art generally is to use anionite-exchange resin, its exchange capacity is less, and processing efficiency is not high.Therefore, need to propose a kind of better high sulfate radical waste water desalting treatment method and treatment system.
Summary of the invention
The objective of the invention is to propose a high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method, be applied to the waste water that sulfate radical content is higher than 200mg/l and carry out desalting treatment, utilize ion exchange technique to remove the hardness of high sulfate radical waste water, can high sulfate radical waste water being processed, thereby guarantee that the reverse osmosis rate of recovery is higher than 85%.
For achieving the above object, the present invention proposes a kind of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method, is applied to sulfate radical content greater than the waste water of 200mg/l, comprises following steps:
(10) described high sulfate radical waste water is carried out cationic exchange by ion exchange method, to reduce the hardness of high sulfate radical waste water; And
(20) will carry out described after the cationic exchange and contain high sulfate radical salt waste water and carry out reverse-osmosis treated, and make the reverse osmosis rate of recovery greater than 85%.
In an embodiment of the present invention, in step (20), under described sulfate radical content is situation more than the 200mg/l, described residual hardness is reduced to below the 0.8mmol/L, so that the described reverse osmosis rate of recovery is greater than 85%.
The present invention also proposes a kind of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment system, be applied to sulfate radical content greater than the waste water of 200mg/l, comprise the ion exchange system and the reverse osmosis treatment system that connect in turn, the described ion exchange system of high sulfate radical brine waste process is to reduce the hardness of high sulfate radical waste water, and pass through described reverse osmosis system and carry out reverse-osmosis treated, make the described reverse osmosis rate of recovery greater than 85%.
In one embodiment, described ion exchange system comprises one-level ion-exchanger and the secondary ion-exchanger that connects in turn, and described one-level ion-exchanger is Na-ion exchanger, and described secondary ion-exchanger is the weak acid ion-exchanger; Perhaps described one-level ion-exchanger is the one-level Na-ion exchanger, and described secondary ion-exchanger is the secondary Na-ion exchanger.
In one embodiment, described reverse osmosis system comprises high-pressure pump, first-stage reverse osmosis device, second level reverse osmosis apparatus and topping-up pump, described high-pressure pump is connected in described first-stage reverse osmosis device, be used for described high sulfate radical waste water supercharging and by described first-stage reverse osmosis device, described topping-up pump is connected in described first-stage reverse osmosis device and described second level reverse osmosis apparatus, is used for the described high sulfate radical waste water supercharging of described first-stage reverse osmosis device discharging and by described second level reverse osmosis apparatus.
Than several methods that improve the reverse osmosis rate of recovery by reducing sulfate radical content of prior art, the present invention has following advantage:
1, ion exchange softening is applied to pretreatment technology before the reverse osmosis, reaches the scale effect of indirectly control sulfate anion by the corresponding easily fouling positively charged ion of control sulfate radical.
2, Zeo-karb is than anionite-exchange resin antipollution more, and exchange capacity is larger, and the regenerator cost is low, invests or running cost is all lower.
3, with CaSO
4, MgSO
4Fouling is analyzed as principal element, by research control residual hardness index, the reverse osmosis water rate of recovery is brought up to more than 85%, even can be reached more than 95%.
Description of drawings
Fig. 1 is conventional reverse osmosis system flow setting figure.
Fig. 2 is the schema of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method in one embodiment of the invention.
Fig. 3 is the schema of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method in another embodiment of the present invention.
Figure 4 shows that the synoptic diagram of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment system in one embodiment of the invention.
Figure 5 shows that the synoptic diagram of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment system in another embodiment of the present invention.
Fig. 6 is the schema of the reverse osmosis system of the high sulfate radical waste water of the present invention superelevation water rate of recovery RO desalting treatment system.
Embodiment
Below by several specific embodiments, describe purpose of the present invention, means and effect in detail, yet it should be noted that scope of the present invention is not limited to following embodiment, anyly be used in the identical or close means of the present invention all within the scope of the present invention.
In ion exchange method, the resin anion(R.A) exchange capacity causes processing efficiency to be not so good as Zeo-karb much smaller than cationic exchange capacity.Therefore the present invention proposes a kind of high sulfate radical waste water desalting treatment method, and ion exchange method is applied to pretreatment technology before the reverse osmosis, reaches the scale effect of indirectly control sulfate anion by easy fouling positively charged ion corresponding to control sulfate radical.
In general, the water rate of recovery of conventional reverse osmosis is below 75%, and the reverse osmosis water rate of recovery is that 75%-85% is the high reverse osmosis water rate of recovery, is not that general technique can reach.The present invention proposes a kind of high sulfate radical waste water superelevation water rate of recovery RO(Reverse Osmosis, reverse osmosis) desalting treatment method and treatment system, the reverse osmosis water rate of recovery can be reached more than 85%.
Figure 2 shows that the high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method of one embodiment of the invention, as shown in Figure 2, high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method of the present invention may further comprise the steps:
(10) high sulfate radical waste water is carried out ion-exchange by base exchange method, to reduce the hardness of high sulfate radical waste water;
(20) will carry out cationic exchange described waste water afterwards and carry out reverse-osmosis treated, the wherein reverse osmosis rate of recovery is greater than 85%.
Wherein, in step (20), under described sulfate radical content is situation more than the 200mg/l, by described residual hardness is reduced to below the 0.8mmol/L, so that the described reverse osmosis rate of recovery is greater than 85%.
Ion exchange method of the present invention can be the combination of sodium ion exchange process, weak acid ion exchange method or sodium ion exchange process and weak acid ion exchange method, perhaps can carry out twice sodium ion exchange and twice weak acid ion-exchange, to remove in the high waste water corresponding to SO
4 2-Positively charged ion.
In another embodiment shown in Figure 3, before step 10, also comprise:
(1) conventional ion exchange water inlet requirement is satisfied in pre-treatment measure.The pre-treatment measure for example is that high sulfate radical waste water is removed carbonate hardness by the lime settling pond, and the step that precipitation is filtered, to reduce the hardness of sulfate radical waste water.
As shown in Figure 2, after step 10, also comprise before the step 20:
(15) step of de-carbon, if corresponding high sulfate radical waste water is negative hard water, carbonate alkalinity affects residual hardness index in the water in the water under the reverse osmosis high-recovery, the step of de-carbon can effectively reduce carbonate alkalinity content in the water.If corresponding high sulfate radical waste water is positive hard water, then do not need to carry out the step of de-carbon.
The principle of de-carbon is that water PH is adjusted to acidity, carbonate alkalinity is changed into form of carbon dioxide, will contain the water of great amount of carbon dioxide by multilayer insulating panel, water forms water film at dividing plate, utilize atmospheric effect, thereby carbonic acid gas is separated carbonate alkalinity in the reduction water from water.
For content of the present invention can be described in detail in detail, one embodiment of the invention provides a Coal Chemical Engineering Industry waste water project, processing the water source is the strong brine that whole plant area reuse water treatment unit is discharged, treatment system requires to use as much as possible reverse osmosis desalination and requires to obtain 90% the system water rate of recovery, and this engineering influent quality condition is as follows:
Can find out that by above-mentioned the present embodiment water quality characteristics is as follows: 1, water hardness is high, and wherein carbonate hardness and non-carbonate hardness are all higher; 2, sulfate radical content is up to arriving 3080.0mg/l; 3, total dissolved solid is high.For These characteristics, the system flow that the present invention proposes arranges as follows:
(1) waste water is regulated pH value to 6.5-8 by equalizing tank;
(2) remove most of carbonate hardness and part permanent hardness with regulating pH value waste water afterwards in the step (1) by the lime settling pond, and filter going out water precipitation;
(3) carry out the sodium ion exchange, with the Ca in the displacement water outlet
2+, Mg
2+Deng positively charged ion;
(4) carry out reverse osmosis desalination and process, and the waste water that produces is entered the recycle system.
Wherein, in step (2), formed by the following step: make waste water pass through lime machinery settling pond and remove most of carbonate hardness and part permanent hardness,
----------passing through ultra-filtration equipment---produces the pond by ultrafiltration to pass through clean water basin by becoming hole filtering pool and filtering.Lime machinery settling pond adds lime and two kinds of medicaments of yellow soda ash, and the purpose that wherein adds yellow soda ash is to remove the part permanent hardness, removes forever hard method economy than ion exchange method.As all utilizing follow-up resin to remove permanent hardness, working cost is high, and therefore, front end utilizes the precipitator method to remove the part permanent hardness.For lime-soda process is removed hardness (CO
3 2-) application apparatus; Become hole filtering pool and ultra-filtration equipment and guarantee that the ion-exchange water inlet is to the requirement of suspended substance; And for for high sulfate radical waste water and guarantee follow-up high water rate of recovery reverse osmosis (more than or equal to 90%), in step (3), need to arrange one-level Na-ion exchanger and secondary Na-ion exchanger.
In addition, this engineering is positive hard water, thereby does not need to arrange the step of removing hardness for negative hard water.But in other embodiments, if remove firmly for negative hard water, the step that passes into carbon dioxide cleaner and de-carbon pond should be increased, to remove hardness for negative hard water between step (3) and step (4).
From the above, the entire flow of this engineering is as follows: come water---regulates by equalizing tank that---------------is produced from the pond in ultrafiltration, and------------circulating water system is water as a supplement for reverse osmosis unit---fresh-water pool---for carbon dioxide cleaner and de-carbon pond for the secondary Na-ion exchanger for the one-level Na-ion exchanger for ultra-filtration equipment for clean water basin to become hole filtering pool for lime machinery settling pond.
Through experimental verification, the waste water of this project can be controlled residual harness less than 2mg/l after by the one-level Na-ion exchanger, by controlling residual harness behind the secondary Na-ion exchanger less than 0.15mg/l.
In other embodiments, step (3) also can replace to uses the weak acid ion exchange method, with the Ca in the displacement water outlet
2+, Mg
2+Deng positively charged ion.In addition, also can use by the series connection of sodium ion exchange process and weak acid ion exchange method, remove with the positively charged ion in the displacement water outlet.
The present invention also proposes a kind of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment system.Figure 4 shows that the synoptic diagram of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment system in one embodiment of the invention.As shown in Figure 4, high sulfate radical waste water superelevation water rate of recovery RO desalting treatment system comprises lime settling pond 100, filter tank 200, one-level ion-exchanger 301, secondary ion-exchanger 401 and reverse osmosis system 600.Wherein 100 li of lime settling ponds add respectively lime A, yellow soda ash B and sour C, and one-level ion-exchanger 301 and secondary ion-exchanger 401 have formed ion exchange system 300.In the present embodiment, one-level ion-exchanger 301 and secondary ion-exchanger 302 are respectively Na-ion exchanger and weak acid ion-exchanger, perhaps are respectively one-level Na-ion exchanger and secondary Na-ion exchanger.
High sulfate radical waste water I removes most of carbonate hardness and part permanent hardness by lime settling pond 100, and filters by filter tank 200.By the Ca in one-level ion-exchanger 301 and the 401 displacement water outlets of secondary ion-exchanger
2+, Mg
2+Deng positively charged ion.Process through reverse osmosis system 600 again, so that the water rate of recovery is brought up to more than 85%.
Figure 5 shows that the synoptic diagram of high sulfate radical waste water superelevation water rate of recovery RO desalting treatment system in another embodiment of the present invention.As shown in Figure 5, be provided with carbon dioxide cleaner 500 between ion exchange system 300 and reverse osmosis system 600, if corresponding high sulfate radical waste water is negative hard water, the step of de-carbon can effectively reduce carbonate alkalinity content in the water.
Fig. 6 is the schema of the reverse osmosis system of the high sulfate radical waste water of the present invention superelevation water rate of recovery RO desalting treatment system.Comparison diagram 6 and Fig. 1, the reverse osmosis system among Fig. 6 comprise high-pressure pump 601, first-stage reverse osmosis device 602, second level reverse osmosis apparatus 603 and topping-up pump 604.Brine waste I enters reverse osmosis system, through high-pressure pump 601 pressurizations, by first-stage reverse osmosis device 602.Wherein be recovered through the product water I1 after the first-stage reverse osmosis device 602, and dense water enters second level reverse osmosis apparatus 603 after by topping-up pump 604 superchargings.Product water through second level reverse osmosis apparatus 603 is recovered, and dense water I2 is discharged, and dense water I2 ' is back to the water-in of high-pressure pump 601.It is as follows that the structure of reverse osmosis system of the present invention arranges characteristics:
The present invention is provided with two sections supercharging systems, and namely the dense water of first-stage reverse osmosis device 602 arranges 604 to two sections entry of topping-up pump.Total salinity is large and require 85% the device water rate of recovery because the present invention is intake, and reverse osmosis arranges then high-pressure pump 601 pressure routinely just needs very greatly, and the pressure of high-pressure pump 601 is large, make one section water flow excess load, and two sections loads is low, causes the water outlet inequality.As two sections imports topping-up pump 604 being set, then not only one section, two sections aquifer yields of capable of regulating are loaded, and high-pressure pump 601 pressure also can reduce.High-pressure pump 601 is total flooding velocity of whole process, and topping-up pump 604 only is about 1/3 of total flooding velocity, and the setting of topping-up pump 604 is save energy more.
Reverse osmosis system of the present invention is provided with two sections concentrate recirculation devices, because reverse osmosis is up to the rate of recovery more than 85%, the dense water of whole system need concentrate 10 times, high concentration rate like this, two sections concentrated stream amounts of conventional reverse osmosis will drop to very low, can't satisfy reverse osmosis membrane to the requirement of dense water effluent amount, reverse osmosis will reach the high rate of recovery and can't realize.Increase concentrate recirculation, making has the part current at internal recycle in the system and device, guarantee the realization of the high water rate of recovery of high saliferous.
In addition, one section reverse osmosis unit of reverse osmosis treatment system of the present invention 602 is used the brackish water membrane element, two sections reverse osmosis units 603 are used the seawater membrane element of the higher salt amount of ability and pressure, different membrane element settings, can give full play to one section reverse osmosis and two sections feed water by reverse osmosis characteristics, guarantee the efficient stable operation of whole device.
Than several methods that improve the reverse osmosis rate of recovery by reducing sulfate radical content of prior art, the present invention has following advantage:
1, ion exchange softening is applied to pretreatment technology before the reverse osmosis, reaches the scale effect of indirectly control sulfate anion by easy fouling positively charged ion corresponding to control sulfate radical.
2, Zeo-karb is than anionite-exchange resin antipollution more, and exchange capacity is larger, and the regenerator cost is low, invests or running cost is all lower.
3, with CaSO
4, MgSO
4Fouling is analyzed as principal element, by research control residual hardness index, the reverse osmosis water rate of recovery is brought up to more than 85%, even can be reached more than 95%.
Although described the present invention with reference to several exemplary embodiments, should be appreciated that used term is explanation and exemplary and nonrestrictive term.Because the present invention is implementation and do not break away from spirit of the present invention or essence in a variety of forms, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and should be in the spirit and scope that claims limit explain widely, therefore fall into whole variations in claim or its equivalent scope and remodeling and all should be claims and contain.
Claims (13)
1. one kind high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method is applied to sulfate radical content greater than the waste water of 200mg/l, it is characterized in that, comprises following steps:
(10) described high sulfate radical waste water is carried out cationic exchange by ion exchange method, to reduce the hardness of high sulfate radical waste water; And
(20) will carry out described after the cationic exchange and contain high sulfate radical salt waste water and carry out reverse-osmosis treated, and make the reverse osmosis rate of recovery greater than 85%.
2. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method as claimed in claim 1, it is characterized in that the described ion exchange method in the step (10) is the combination of sodium ion exchange process, weak acid ion exchange method or sodium ion exchange process and weak acid ion exchange method.
3. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method as claimed in claim 2 is characterized in that described sodium ion exchange process comprises:
By the exchange of one-level sodium ion and the exchange of secondary sodium ion described high sulfate radical waste water is carried out ion-exchange.
4. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method as claimed in claim 1 is characterized in that, also comprises before in described step (10):
(1) high sulfate radical waste water is carried out pre-treatment, to reduce the hardness of high sulfate radical waste water.
5. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method as claimed in claim 4 is characterized in that, described step (10) afterwards, step (20) also comprises before:
(15) high sulfate radical waste water is carried out carbon removal treatment.
6. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method as claimed in claim 2 is characterized in that, being combined as of described sodium ion exchange process and weak acid ion exchange method:
By the exchange of one-level sodium ion and the ion-exchange of secondary weak acid described high sulfate radical waste water is carried out ion-exchange.
7. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment method as claimed in claim 1 is characterized in that, in step (20), by described residual hardness is reduced to below the 0.8mmol/L, so that the described reverse osmosis rate of recovery is greater than 85%.
8. one kind high sulfate radical waste water superelevation water rate of recovery RO desalting treatment system, be applied to sulfate radical content greater than the waste water of 200mg/l, it is characterized in that, comprise the ion exchange system (300) and the reverse osmosis treatment system (600) that connect in turn, described high sulfate radical brine waste (I) carries out cationic exchange through described ion exchange system (300), to reduce the hardness of high sulfate radical waste water, and pass through described reverse osmosis system (600) and carry out reverse-osmosis treated, make the described reverse osmosis rate of recovery greater than 85%.
9. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment as claimed in claim 8 system, it is characterized in that, described ion exchange system (300) comprises one-level ion-exchanger (301) and the secondary ion-exchanger (302) that connects in turn, described one-level ion-exchanger (301) is Na-ion exchanger, and described secondary ion-exchanger (302) is the weak acid ion-exchanger; Perhaps described one-level ion-exchanger (301) is the one-level Na-ion exchanger, and described secondary ion-exchanger (302) is the secondary Na-ion exchanger.
10. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment as claimed in claim 8 system is characterized in that, also is provided with carbon dioxide cleaner (500) between described ion exchange system (300) and the described reverse osmosis system (600).
11. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment as claimed in claim 8 system is characterized in that described ion exchange system (300) also comprises lime settling pond (100) and filter tank (200) before.
12. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment as claimed in claim 8 system, it is characterized in that, described reverse osmosis system (600) comprises high-pressure pump (601), first-stage reverse osmosis device (602), second level reverse osmosis apparatus (603) and topping-up pump (604), described high-pressure pump (601) is connected in described first-stage reverse osmosis device (602), be used for described high sulfate radical waste water (I) supercharging and by described first-stage reverse osmosis device (602), described topping-up pump (604) is connected in described first-stage reverse osmosis device (602) and described second level reverse osmosis apparatus (603), is used for described high sulfate radical waste water (I) supercharging of described first-stage reverse osmosis device (602) discharging and by described second level reverse osmosis apparatus (603).
13. high sulfate radical waste water superelevation water rate of recovery RO desalting treatment as claimed in claim 12 system is characterized in that, the dense water that described second level reverse osmosis apparatus (603) produces (I2 ') is back to the water-in of described high-pressure pump (601).
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Cited By (5)
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| CN104724842A (en) * | 2013-12-24 | 2015-06-24 | 北京新源国能科技有限公司 | Reverse osmosis water treatment system and water treatment method |
| CN108341527A (en) * | 2018-04-10 | 2018-07-31 | 淄博格瑞水处理工程有限公司 | High-recovery removal bitter and fishiness |
| CN108585262A (en) * | 2017-03-13 | 2018-09-28 | 奥森有限公司 | The method of purified water and equipment suitable for the method |
| CN109821420A (en) * | 2017-11-23 | 2019-05-31 | 神华集团有限责任公司 | Counter-infiltration system and reverse osmosis water treatment method |
| CN115353249A (en) * | 2022-10-20 | 2022-11-18 | 山东金泽水业科技有限公司 | Wastewater treatment process for recovering high-purity sodium bicarbonate by carbon dioxide solidification |
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| CN101428913A (en) * | 2008-12-11 | 2009-05-13 | 彩虹彩色显像管总厂 | Reverse osmosis water production process |
| CN201506738U (en) * | 2009-09-29 | 2010-06-16 | 北京中电加美环境工程技术有限责任公司 | Efficient water-saving type film processing system |
| CN101798150A (en) * | 2010-02-11 | 2010-08-11 | 北京新源国能工程技术有限公司 | Treatment method of wastewater with high salt content and treatment device thereof |
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| CN101428913A (en) * | 2008-12-11 | 2009-05-13 | 彩虹彩色显像管总厂 | Reverse osmosis water production process |
| CN201506738U (en) * | 2009-09-29 | 2010-06-16 | 北京中电加美环境工程技术有限责任公司 | Efficient water-saving type film processing system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724842A (en) * | 2013-12-24 | 2015-06-24 | 北京新源国能科技有限公司 | Reverse osmosis water treatment system and water treatment method |
| CN108585262A (en) * | 2017-03-13 | 2018-09-28 | 奥森有限公司 | The method of purified water and equipment suitable for the method |
| CN109821420A (en) * | 2017-11-23 | 2019-05-31 | 神华集团有限责任公司 | Counter-infiltration system and reverse osmosis water treatment method |
| CN108341527A (en) * | 2018-04-10 | 2018-07-31 | 淄博格瑞水处理工程有限公司 | High-recovery removal bitter and fishiness |
| CN108341527B (en) * | 2018-04-10 | 2019-07-02 | 淄博格瑞水处理工程有限公司 | High-recovery removal bitter and fishiness |
| CN115353249A (en) * | 2022-10-20 | 2022-11-18 | 山东金泽水业科技有限公司 | Wastewater treatment process for recovering high-purity sodium bicarbonate by carbon dioxide solidification |
| CN115353249B (en) * | 2022-10-20 | 2023-02-03 | 山东金泽水业科技有限公司 | Wastewater treatment process for recovering high-purity sodium bicarbonate by carbon dioxide solidification |
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