CN102139235B - Method for regenerating ion exchange resin of reverse osmosis rear secondary mixed bed - Google Patents
Method for regenerating ion exchange resin of reverse osmosis rear secondary mixed bed Download PDFInfo
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- CN102139235B CN102139235B CN2010106140214A CN201010614021A CN102139235B CN 102139235 B CN102139235 B CN 102139235B CN 2010106140214 A CN2010106140214 A CN 2010106140214A CN 201010614021 A CN201010614021 A CN 201010614021A CN 102139235 B CN102139235 B CN 102139235B
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- resin
- bed
- mixed bed
- reverse osmosis
- secondary mixed
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 22
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 title claims abstract description 5
- 239000003456 ion exchange resin Substances 0.000 title claims abstract description 5
- 229920003303 ion-exchange polymer Polymers 0.000 title claims abstract description 5
- 230000001172 regenerating effect Effects 0.000 title abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 65
- 229920005989 resin Polymers 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003513 alkali Substances 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 34
- 230000008929 regeneration Effects 0.000 claims description 17
- 238000011069 regeneration method Methods 0.000 claims description 17
- 238000009418 renovation Methods 0.000 claims description 17
- 150000002500 ions Chemical class 0.000 claims description 14
- 150000001450 anions Chemical class 0.000 claims description 7
- 150000001768 cations Chemical class 0.000 claims description 2
- 230000008439 repair process Effects 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 1
- 238000011001 backwashing Methods 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- 231100000572 poisoning Toxicity 0.000 description 3
- 230000000607 poisoning effect Effects 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 150000003377 silicon compounds Chemical class 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a method for regenerating ion exchange resin of a reverse osmosis rear secondary mixed bed. The method is characterized by comprising the following regenerating steps of: 1) cleaning the ion exchange resin of the secondary mixed bed to be regenerated by using low-concentration alkali liquor so that the resin totally becomes invalid; 2) soaking the totally invalid resin into high-concentration alkali liquor; 3) performing a resin backwashing and demixing process, and cleaning the resin by using heat removal saline; and 4) finally regenerating the mixed bed in a normal regenerating order. The method can effectively solve the common SiO2 deposition positioning problem of the secondary mixed bed in back of a reverse osmosis (RO) water treatment system, and is simple in operation and economic and valid; and the effluent water quality of the mixed bed can reach the standard requirements, the consumption of expensive resin can be reduced, and the effluent water quality can be improved.
Description
Technical field
A kind of renovation process of reverse osmosis postposition secondary mixed bed ion exchanger resin relates to a kind of reverse osmosis (RO) of a kind of water treatment procedure system rearmounted secondary mixed bed ion exchanger resin and removes SiO
2Renovation process.
Background technology
The technology of the water treatment system that adopts at large-scale alumina producer at present, is generally: underground water mixes a treatment process through sand filtration+security personnel filter+counter-infiltration+de-carbon+two-stage.Above-mentioned technology is after operation a period of time, and regular meeting secondary occurs and mixes bed water outlet SiO
2The phenomenon that exceeds standard, and intractable usually influence the boiler feedwater quality.
At present, the strong base anion resins silica removal that two-stage is mixed the bed employing is the ion-exchange reactions silica removal, mainly is to remove the middle dissolved silicon that anhydrates, and its reaction equation is following:
ROH＋H
2SiO
3?＝?RHSiO
3＋H
2O
The work characteristics of strong base negative resin is: exchange capacity is less, and regeneration efficiency is lower.In the weak solution, strong base negative resin is to HSiO in several kinds of main anion
3Selectivity a little less than, the combination of it and resin also is least stable, and RHSiO
3Type resin facile hydrolysis.
When negative resin lost efficacy, when regenerating with NaOH solution, anion was to SiO
3 2-Selectivity order again a little less than, so SiO
3 2-Difficulty is reproduced.
When former water all-silicon content reaches 13.6mg/L, molten silicon reaches 10.1mg/L, and molten silicon accounts for 74.2% o'clock of total silicon, and in the reverse osmosis process, the reverse osmosis unit subsequent treatment directly is a two-stage mixed bed ion exchange desalination.Because RO is the physics desalination,, one-level contains SO so mixing in the bed water inlet
4 2-, CL
-, HCO
3 -, HSiO
3 -Wait all anion, after the exchange through the mixed bed of one-level negative resin, that get into the mixed bed of secondary mainly is HCO
3 -, HSiO
3 -Two kinds of anion are through measuring wherein HSiO
3 -Content is HCO
3 -The 3-5 of content times, when terminal point arrived, the secondary of inefficacy mixed in the bed negative resin, RHSiO like this
3Ratio is up to 75% ~ 85%, and at this moment, conventional renovation process can't thoroughly be removed silicic acid, so can cause mixing a bed water outlet SiO when putting into operation once more
2Content overproof.We are referred to as this phenomenon " silicon poisoning ".Silicon is poisoned and to be prone to occur in the strong basicity negative resin that secondary mixes bed, and the renovation process of former routine is: 1) resin layering, 2) advance the low concentration soda acid, acid concentration 2%-3%, alkali concn 1%-2%, time: 30-45min, 3) displacement just washes 4) to mix fat subsequent use.This method can not guarantee that the reason of regeneration effect is: regenerated liquid in shortage has only when flowing through resin bed that the part silicon compound is reproduced, the part silicon compound still remains in the resin, and reaction equation is:
RHSiO
3+2NaOH=ROH+NaSiO
3+H
2O
Subsequently when regenerated liquid continues to flow through, because of its OH
-Reduce pH value and descend, in addition occur acid, be born again silicon compound can change into silicic acid because of hydrolysis, like reaction equation:
NaSiO
3+2H
2O=H
2SiO
3+2NaOH
If silicic acid concentration is bigger, will form collodial silica (non-reacted silicon).Be difficult to remove with ion-exchange.
Summary of the invention
The object of the invention is exactly the deficiency that exists to above-mentioned prior art, provide a kind of can effectively solve counter-infiltration (RO) water treatment system after the second level mix the normal SiO who takes place of bed
2Deposition poisoning problem, simple to operate, economical and effective can make and mix the renovation process that the bed effluent quality can reach the reverse osmosis postposition secondary mixed bed ion exchanger resin of standard-required.
The objective of the invention is to realize through following technical scheme.
A kind of renovation process of reverse osmosis postposition secondary mixed bed ion exchanger resin is characterized in that the step of its regenerative process comprises:
1) ion exchange resin that secondary mixes bed of will waiting to regenerate cleans with low-concentration alkali liquor, makes resin entirely ineffective;
2) resin after entirely ineffective is soaked with high-concentration alkali liquor;
3) resin backwash layering operation is cleaned negative resin with hot demineralized water;
4) mix bed by the regeneration of regular regeneration order at last.
The renovation process of a kind of reverse osmosis postposition secondary mixed bed ion exchanger resin of the present invention is characterized in that its secondary mixed-bed resin type is respectively the resin cation of MB 001 * 7, MB 201 * 7 resin anion (R.A.)s.
The renovation process of a kind of reverse osmosis postposition secondary mixed bed ion exchanger resin of the present invention is characterized in that low-concentration alkali liquor is 0.5% NaOH solution, and the NaOH solution flow rate is during cleaning: 4-5m/h.
The renovation process of a kind of reverse osmosis postposition secondary mixed bed ion exchanger resin of the present invention is characterized in that high-concentration alkali liquor is 5% NaOH solution, advances alkali flow velocity 4-5m/h, and soak time is 24 hours, soaks the back and uses water rinse resin to water outlet to be neutrality.
The renovation process of a kind of reverse osmosis postposition secondary mixed bed ion exchanger resin of the present invention, the hot demineralized water temperature that it is characterized in that cleaning after the described backwash layering negative resin is 45 ℃-50 ℃.
The renovation process of a kind of reverse osmosis postposition secondary mixed bed ion exchanger resin of the present invention, adopt 1-3 step process of the present invention after, adopt conventional renovation process to handle again, and four treatment steps must combine closely, indispensable.1) low-concentration alkali liquor cleans.Purpose: impel not entirely ineffective positive resin entirely ineffective, for subsequent step is prepared.2) high-concentration alkali liquor is soaked.Purpose: with the most of HSiO that adsorbs in the resin
3 -Cement out.3) after the resin backwash layering, hot demineralized water cleans negative resin.Purpose: but a part of HSiO in the wash-out resin
3 -, regeneration can alleviate the regenerative agent burden afterwards, reduces regeneration dosage, can improve the regeneration effect of the negative resin of more difficult life simultaneously, and in addition, heating-up temperature is in the heat resistanceheat resistant scope interior (60 ℃) of strong base negative resin, can not damage negative resin.4) mix bed by the regeneration of regular regeneration order at last.Purpose: regular regeneration, adopting low-concentration alkali liquor is for the HSiO with remainder in the negative resin
3 -Cement out.
The renovation process of a kind of reverse osmosis postposition secondary mixed bed ion exchanger resin of the present invention can effectively solve after counter-infiltration (RO) water treatment system second level and mix the normal SiO who takes place of bed
2Deposition poisoning problem, simple to operate, economical and effective is mixed the bed effluent quality and can be reached standard-required, can reduce expensive resin consumption, improves effluent quality.
The specific embodiment
A kind of renovation process of reverse osmosis postposition secondary mixed bed ion exchanger resin, secondary mix bed water outlet SiO
2(resin SiO behind the index exceeding standard
2Deposition is poisoned), handle by following method:
(1) first step: after secondary mixed the bed stoppage in transit, the NaOH solution with 0.5% low concentration passed through the mixed-bed resin layer with the 4-5m/h flow velocity earlier, treated to stop when alkali lye flows out;
(2) second steps: 1) the NaOH solution with 5% high concentration also passes through the mixed-bed resin layer with the 4-5m/h flow velocity, treats to close down row when alkali lye flows out, and soaks resin 24 hours, the regeneration product of draining then;
2) with the demineralized water flushing, when PH=7, stop;
(3) the 3rd steps: 1) backwash layering, discharge water;
2) negative resin elder generation is cleaned one time with 45 ℃-50 ℃ hot demineralized water;
3) mix bed regeneration by the regular regeneration order: flow velocity 10-12m/h, concentration of hydrochloric acid: 2.5%, caustic soda concentration: 1.5% (conventional regeneration concentration), time: 40min.
4) finishing the mixed bed entering of back secondary comes into operation or stand-by state.
Concrete effect is following:
1) secondary mixes the contrast of bed effluent index:
Design standard: DD (μ s/cm)≤0.2 μ s/cm; SiO
2≤20 μ g/l
Can see SiO
2Drop to the low value of 5.7 μ g/l by the average 25.9 μ g/l before implementing.
2) secondary mixes the situation contrast of bed operating cycle:
Design standard: do not have (the longer the better).
Can see the cycle of operation by implementing to rise to 51 days in preceding average 13 days, regeneration labour intensity significantly reduces, and the water outlet qualification rate rises to 100%, has improved boiler feedwater water quality greatly, has also reduced the waste of resin simultaneously.
Claims (2)
1. the renovation process of a reverse osmosis postposition secondary mixed bed ion exchanger resin is characterized in that the step of its regenerative process comprises:
1) ion exchange resin that secondary mixes bed of will waiting to regenerate cleans with low-concentration alkali liquor, makes resin entirely ineffective; Its low-concentration alkali liquor is 0.5% NaOH solution, and the NaOH solution flow rate is during cleaning: 4-5m/h;
2) resin after entirely ineffective is soaked with high-concentration alkali liquor; Its high-concentration alkali liquor is 5% NaOH solution, advances alkali flow velocity 4-5m/h, and soak time is 24 hours, soaks the back and uses water rinse resin to water outlet to be neutrality;
3) resin backwash layering operation is cleaned negative resin with hot demineralized water; The hot demineralized water temperature of cleaning negative resin after its described backwash layering is 45 ℃-50 ℃;
4) mix bed by the regeneration of regular regeneration order at last.
2. the renovation process of a kind of reverse osmosis postposition secondary mixed bed ion exchanger resin according to claim 1 is characterized in that its secondary mixed-bed resin type is respectively the resin cation of MB 001 * 7, MB 201 * 7 resin anion (R.A.)s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106140214A CN102139235B (en) | 2010-12-30 | 2010-12-30 | Method for regenerating ion exchange resin of reverse osmosis rear secondary mixed bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106140214A CN102139235B (en) | 2010-12-30 | 2010-12-30 | Method for regenerating ion exchange resin of reverse osmosis rear secondary mixed bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102139235A CN102139235A (en) | 2011-08-03 |
| CN102139235B true CN102139235B (en) | 2012-07-25 |
Family
ID=44407166
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106140214A Active CN102139235B (en) | 2010-12-30 | 2010-12-30 | Method for regenerating ion exchange resin of reverse osmosis rear secondary mixed bed |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445736B (en) * | 2014-10-12 | 2017-03-29 | 国家电网公司 | Desalination processing system and its method for operation that reverse osmosis membrane is combined with ion-exchanger |
| CN110013889B (en) * | 2018-01-09 | 2021-11-16 | 宝山钢铁股份有限公司 | Large-scale mixed bed anion-cation resin soaking type regeneration method |
| CN108704674A (en) * | 2018-06-30 | 2018-10-26 | 神华国华广投（柳州）发电有限责任公司 | A kind of highly efficient regeneration method of hybrid resin |
| CN109289941A (en) * | 2018-10-29 | 2019-02-01 | 北方华锦化学工业股份有限公司 | Condensate liquid treater method of reproduction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912153A (en) * | 2006-08-25 | 2007-02-14 | 山东铝业股份有限公司 | Method for extracting metallic gallium from aluminium oxide production procedure |
| CN201161191Y (en) * | 2008-01-24 | 2008-12-10 | 杭州美亚水处理科技有限公司 | Acid-alkali regenerative agent conserving mix bed regenerating unit |
| CN101475180A (en) * | 2009-01-16 | 2009-07-08 | 清华大学 | Purification method of ultra-pure silicon dioxide sol |
| CN101780422A (en) * | 2010-03-05 | 2010-07-21 | 南京中电联环保股份有限公司 | Four-tower mixed ion exchanger resin external separation regeneration method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6929748B2 (en) * | 2003-03-28 | 2005-08-16 | Chemitreat Pte Ltd | Apparatus and method for continuous electrodeionization |
-
2010
- 2010-12-30 CN CN2010106140214A patent/CN102139235B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912153A (en) * | 2006-08-25 | 2007-02-14 | 山东铝业股份有限公司 | Method for extracting metallic gallium from aluminium oxide production procedure |
| CN201161191Y (en) * | 2008-01-24 | 2008-12-10 | 杭州美亚水处理科技有限公司 | Acid-alkali regenerative agent conserving mix bed regenerating unit |
| CN101475180A (en) * | 2009-01-16 | 2009-07-08 | 清华大学 | Purification method of ultra-pure silicon dioxide sol |
| CN101780422A (en) * | 2010-03-05 | 2010-07-21 | 南京中电联环保股份有限公司 | Four-tower mixed ion exchanger resin external separation regeneration method |
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| Publication number | Publication date |
|---|---|
| CN102139235A (en) | 2011-08-03 |
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Effective date of registration: 20170602 Address after: Qixian town Henan province 454171 Xiuwu County of Zhongzhou aluminum plant Patentee after: Chalco Zhongzhou Aluminium Industry Co., Ltd. Address before: 100082 Beijing, Xizhimen, North Street, No. 62, No. Patentee before: Aluminum Corporation of China Limited |
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