CN104003478A - Extracorporeal upflow regeneration process for ion exchange resin - Google Patents
Extracorporeal upflow regeneration process for ion exchange resin Download PDFInfo
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- CN104003478A CN104003478A CN201410264988.2A CN201410264988A CN104003478A CN 104003478 A CN104003478 A CN 104003478A CN 201410264988 A CN201410264988 A CN 201410264988A CN 104003478 A CN104003478 A CN 104003478A
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Abstract
The invention provides an extracorporeal upflow regeneration process for ion exchange resin. The process includes the following steps that firstly, soft water is produced, and meanwhile exhausted resin is continuously discharged from the lower portion of an ion exchanger; secondly, the exhausted resin is conveyed to a gathering tank through injection, conveying fluid is drained from the upper portion of the gathering tank, and the exhausted resin is discharged from the bottom of the gathering tank and enters a regeneration tank; thirdly, regeneration fluid flows into the lower portion of the regeneration tank, upflow regeneration is conducted on the exhausted resin, and regenerated resin is discharged from the bottom of the regeneration tank and enters a cleaning tank; fourthly, water flows into the lower portion of the cleaning tank, the regeneration fluid left on the regenerated resin is reversely cleaned away, and the cleaned regenerated resin is discharged from the bottom of the cleaning tank and is conveyed back to the ion exchanger through injection. According to the process, the soft water can be continuously produced, energy consumption is reduced, and the equipment utilization rate is increased.
Description
Technical field
The invention belongs to soft water process water field, be specifically related to a kind of external counter-current regeneration technique of ion exchange resin.
Background technology
The in return agent of sodium ion exchange resin of certain altitude is generally equipped with in the water treatment of prior art in Na-ion exchanger.Former water is through interchanger (following current or adverse current), and the sodium ion on exchanger replaced calcium, magnesium ion in former water, it is softening that water has been obtained.
Ca
2++2NaR?→?CaR+2Na
+
Mg
2++2NaR?→?MgR+2Na
+
Sodium ion on exchanger is replaced by calcium, magnesium ion gradually, when using after for some time, will leak out calcium, magnesium ion, in the time going out water hardness and reach the numerical value of defined, out of service, regenerates.When regeneration, 5～8% salt solution is passed through to exchanger layer.Sodium ion in saline solution displaces again calcium, the magnesium ion on exchanger, and exchanger is regenerated, and recovers its exchange capacity.React as follows:
CaR+2Na
+→?Ca
2++2NaR
MgR+2Na
+→?Mg
2++2NaR
The fixed bed Na-ion exchanger that at present China's Treatment of Industrial Water is generally used, have equipment simple, easy to operate, to the adaptable advantage of various water quality.Do not reach processing requirement when producing water (soft water), resins exchange ability declines or lost efficacy, and need stop and resin be carried out to manipulation of regeneration with regenerator, and resin is rejuvenated; Wash through suitable, backwash processing, recovers exchanger function, then carries out water treatment again.It is low that existing fixed bed Na-ion exchanger has resin utilization ratio, and cyclic regeneration scavenging period is long, the shortcoming that water consumption is large.
In order to reach the object of water saving, document " fixed bed Na-ion exchanger is intermittently just being washed water-saving technology " (" water technology ", the 36th the 10th phase of volume) intermittently that disclose a kind of fixed bed Na-ion exchanger just washing water-saving technology, by twin-stage Na-ion exchanger is just being washed to blowdown and Inner construction analysis, the mode of intermittently just washing is proposed.By the technological transformation to equipment inlet and outlet valve and water shoot, valve and design new working routine, analyze blowdown water quality, optimize operating parameter, water-saving rate reaches 70%.But still there is following shortcoming: can not produce continuously water, need many of investments to exchange and produce water, water-saving rate is still lower, and regenerated liquid consumes high.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of external counter-current regeneration technique of ion exchange resin.The ion exchange resin losing efficacy in technique of the present invention, by carrying out getting back to interchanger after counter-current regeneration in interchanger outside, can be produced soft water continuously, reduces energy consumption, improves plant factor.
For achieving the above object, the present invention adopts following technical scheme:
The external counter-current regeneration technique of ion exchange resin, is characterized in that: carry out according to the following steps:
A, in producing soft water, discharges the resin of inefficacy continuously from ion-exchanger bottom;
B exhausted resin delivers into holding tank through spraying, and conveying liquid is discharged from the top of holding tank, and exhausted resin is discharged from the bottom of holding tank, enters regenerating tank;
C passes into regenerated liquid to regenerating tank bottom, and exhausted resin carries out counter-current regeneration, and regenerating resin is discharged from the bottom of regenerating tank, enters purge tank;
D is from the bottom water inlet of purge tank, and reverse cleaning falls regenerated liquid residual on regenerating resin, and the regenerating resin after cleaning is discharged from purge tank bottom, gets back to ion-exchanger through spraying continuous conveying.
The external counter-current regeneration technique of ion exchange resin of the present invention is applicable to all water treatment ion-exchangers.
The present invention is by producing soft water, discharge continuously exhausted resin from ion-exchanger, from interchanger outside, resin is carried out to counter-current regeneration, resin after regeneration is inputted and is got back to interchanger continuously again, do not affect the production of soft water, realize the continuous production of soft water, effectively improved utilization ratio, energy efficient and the time of equipment.
Conveying liquid of the present invention is the former water entering before ion-exchanger.
The regenerated liquid flow velocity of C step of the present invention is 4-8m/h, ensures resin duration of contact, favorable regeneration effect.
Production soft water of the present invention refers to, former water enters from the bottom of ion-exchanger, the ion exchange on resin the ion in former water, make water obtained softening after, discharge from interchanger top.Resin is contacted fully with former water, guarantee that soft water is stable.
Preferably, the water inlet of described purge tank is the conveying liquid that discharge on holding tank top.The hardness of conveying liquid of discharging due to holding tank top, lower than original water hardness, can be used for cleaning resin, thereby improves the recovery utilization rate of water.
Preferably, the injection of described D step is carried, and conveying liquid used is soft water, guarantees that the resin of carrying can exchange in interchanger, guarantees that effluent index is stable.
Preferably, the scavenging solution recovery that described D step purge tank is discharged is used for preparing regenerated liquid and recycles.
The below of holding tank of the present invention, regenerating tank and purge tank is provided with one-way cock, avoids unexpected certain the tank body hypertonia of accidental cause to cause resin to reflux.
Preferably, described one-way cock is fin roller valve, can drive resin to flow downward, and is difficult for returning resin, and it is less that water enters next tank body, guarantees resin uniflux.
Beneficial effect of the present invention is:
1, technique of the present invention is in producing soft water, from the inner exhausted resin of discharging continuously of ion-exchanger, from interchanger outside, resin is carried out to counter-current regeneration, resin after regeneration is inputted and is got back to interchanger continuously again, do not affect the production of soft water, realize the continuous production of soft water, effectively improved utilization ratio, energy efficient and the time of equipment.
2, the waste liquid that technique of the present invention is only discharged continuously from regenerating tank after resin regeneration, all the other are all recycled, and guarantee that soft water produces quality continuously.Water-saving rate reaches more than 80%, and regenerant consumption is saved more than 5% than conventional water treatment.
3, the former water of technique of the present invention enters from the bottom of ion-exchanger, the ion exchange on resin the ion in former water, make water obtained softening after, discharge from interchanger top.Resin is contacted fully with former water, guarantee that soft water is stable.
4, between each tank body of the present invention, be provided with one-way cock, avoid unexpected certain the tank body hypertonia of accidental cause to cause resin to reflux.Particularly adopt fin roller valve, can drive resin to flow downward, be difficult for returning resin, it is less that water enters next tank body, guarantees resin uniflux.
Brief description of the drawings
Fig. 1 is the schema of the external counter-current regeneration technique of ion exchange resin of the present invention.
Embodiment
Below in conjunction with embodiment, essentiality content of the present invention is described in further detail.
Embodiment 1
The external counter-current regeneration technique of ion exchange resin, is characterized in that: carry out according to the following steps:
A, in producing soft water, discharges the resin of inefficacy continuously from ion-exchanger bottom;
B exhausted resin delivers into holding tank through spraying, and conveying liquid is discharged from the top of holding tank, and exhausted resin is discharged from the bottom of holding tank, enters regenerating tank;
C passes into regenerated liquid to regenerating tank bottom, and exhausted resin carries out counter-current regeneration, and regenerating resin is discharged from the bottom of regenerating tank, enters purge tank;
D is from the bottom water inlet of purge tank, and reverse cleaning falls regenerated liquid residual on regenerating resin, and the regenerating resin after cleaning is discharged from purge tank bottom, gets back to ion-exchanger through spraying continuous conveying.
Embodiment 2
The external counter-current regeneration technique of ion exchange resin, is characterized in that: carry out according to the following steps:
A, in producing soft water, discharges the resin of inefficacy continuously from ion-exchanger bottom;
B exhausted resin delivers into holding tank through spraying, and conveying liquid is discharged from the top of holding tank, and exhausted resin is discharged from the bottom of holding tank, enters regenerating tank;
C passes into regenerated liquid to regenerating tank bottom, and exhausted resin carries out counter-current regeneration, and regenerating resin is discharged from the bottom of regenerating tank, enters purge tank;
D is from the bottom water inlet of purge tank, and reverse cleaning falls regenerated liquid residual on regenerating resin, and the regenerating resin after cleaning is discharged from purge tank bottom, gets back to ion-exchanger through spraying continuous conveying.
The production soft water of described A step refers to, former water enters from the bottom of ion-exchanger, the ion exchange on resin the ion in former water, make water obtained softening after, discharge from interchanger top.
In A step, resin is deposited on interchanger tank base under the effect of gravity, controls former water flow velocity by tank body sight glass, guarantees that resin deposits tank base under the effect of self gravitation.
Described ion-exchanger arranges 2 sampling spots, a point of tank body outlet, one, 2/3 place of tank body point.User needs index to detect in tank body outlet, and tank body 2/3 detects index for setting index, in the time that hardness reaches just lower than user's index, increases regenerating resin flow velocity (controlling injector uninterrupted) or reduces former water flow velocity.
Embodiment 3
The external counter-current regeneration technique of ion exchange resin, is characterized in that: carry out according to the following steps:
A, in producing soft water, discharges the resin of inefficacy continuously from ion-exchanger bottom;
B exhausted resin delivers into holding tank through spraying, and conveying liquid is discharged from the top of holding tank, and exhausted resin is discharged from the bottom of holding tank, enters regenerating tank;
C passes into regenerated liquid to regenerating tank bottom, and exhausted resin carries out counter-current regeneration, and regenerating resin is discharged from the bottom of regenerating tank, enters purge tank;
D is from the bottom water inlet of purge tank, and reverse cleaning falls regenerated liquid residual on regenerating resin, and the regenerating resin after cleaning is discharged from purge tank bottom, gets back to ion-exchanger through spraying continuous conveying.
The production soft water of described A step refers to, former water enters from the bottom of ion-exchanger, the ion exchange on resin the ion in former water, make water obtained softening after, discharge from interchanger top.
The conveying liquid of described B step is the former water entering before ion-exchanger.
Embodiment 4
The present embodiment is substantially the same manner as Example 3, on this basis:
The regenerated liquid flow velocity of described C step is 4m/h.
The present invention is directed to strong type regeneration of ion-exchange resin concentration is 2%-5%; Because weak mixed ion-exchange resin is easily regenerated, regeneration concentration is 0.5%-5%.
Embodiment 5
The present embodiment is substantially the same manner as Example 3, on this basis:
The regenerated liquid flow velocity of described C step is 8m/h.
Described D step, the water inlet of purge tank is the conveying liquid that holding tank is discharged.
Embodiment 6
The present embodiment is substantially the same manner as Example 3, on this basis:
The regenerated liquid flow velocity of described C step is 5m/h.
Described D step, the water inlet of purge tank is the conveying liquid that holding tank is discharged.
The injection of described D step is carried, and conveying liquid used is soft water.
Embodiment 7
The present embodiment is substantially the same manner as Example 3, on this basis:
The regenerated liquid flow velocity of described C step is 6m/h.
Described D step, the water inlet of purge tank is the conveying liquid that holding tank is discharged.
The injection of described D step is carried, and conveying liquid used is soft water.
The scavenging solution recovery that described D step purge tank is discharged is used for preparing regenerated liquid and recycles.
Embodiment 8
The present embodiment is substantially the same manner as Example 3, on this basis:
The regenerated liquid flow velocity of described C step is 7m/h.
Described D step, the water inlet of purge tank is the conveying liquid that holding tank is discharged.
The injection of described D step is carried, and conveying liquid used is soft water.
The scavenging solution recovery that described D step purge tank is discharged is used for preparing regenerated liquid and recycles.
The below of described holding tank, regenerating tank and purge tank is provided with one-way cock.
Embodiment 9
The present embodiment is substantially the same manner as Example 3, on this basis:
The regenerated liquid flow velocity of described C step is 5.5m/h.
Described D step, the water inlet of purge tank is the conveying liquid that holding tank is discharged.
The injection of described D step is carried, and conveying liquid used is soft water.
The scavenging solution recovery that described D step purge tank is discharged is used for preparing regenerated liquid and recycles.
The below of described holding tank, regenerating tank and purge tank is provided with fin roller valve.
Embodiment 10
The external counter-current regeneration technique of sodium ion exchange resin, is characterized in that: carry out according to the following steps:
A, in producing soft water, discharges the resin of inefficacy continuously from Na-ion exchanger bottom;
B exhausted resin delivers into holding tank through spraying, and conveying liquid is discharged from the top of holding tank, and exhausted resin is discharged from the bottom of holding tank, enters regenerating tank;
C passes into regenerated liquid to regenerating tank bottom, and exhausted resin carries out counter-current regeneration, and regenerating resin is discharged from the bottom of regenerating tank, enters purge tank;
D is from the bottom water inlet of purge tank, and reverse cleaning falls regenerated liquid residual on regenerating resin, and the regenerating resin after cleaning is discharged from purge tank bottom, gets back to Na-ion exchanger through spraying to carry.
Described regenerated liquid is sodium-chlor.
The production soft water of described A step refers to, former water enters from the bottom of Na-ion exchanger, and the sodium ion on resin has been replaced the ion in former water, make water obtained softening after, discharge from Na-ion exchanger top.
The below of described holding tank, regenerating tank and purge tank is provided with one-way cock.
Embodiment 11
The present embodiment is substantially the same manner as Example 10, on this basis:
The conveying liquid of described B step is the former water entering before Na-ion exchanger.
The regenerated liquid flow velocity of described C step is 6m/h.
Described D step, the water inlet of purge tank is the conveying liquid that holding tank is discharged.
The injection of described D step is carried, and conveying liquid used is soft water.
The scavenging solution recovery that described D step purge tank is discharged is used for preparing regenerated liquid and recycles.
The below of described holding tank, regenerating tank and purge tank is provided with fin roller valve.
Claims (10)
1. the external counter-current regeneration technique of ion exchange resin, is characterized in that: carry out according to the following steps:
A, in producing soft water, discharges the resin of inefficacy continuously from ion-exchanger bottom;
B exhausted resin delivers into holding tank through spraying, and conveying liquid is discharged from the top of holding tank, and exhausted resin is discharged from the bottom of holding tank, enters regenerating tank;
C passes into regenerated liquid to regenerating tank bottom, and exhausted resin carries out counter-current regeneration, and regenerating resin is discharged from the bottom of regenerating tank, enters purge tank;
D is from the bottom water inlet of purge tank, and reverse cleaning falls regenerated liquid residual on regenerating resin, and the regenerating resin after cleaning is discharged from purge tank bottom, gets back to ion-exchanger through spraying continuous conveying.
2. the external counter-current regeneration technique of ion exchange resin according to claim 1, it is characterized in that: the production soft water of described A step refers to, former water enters from the bottom of ion-exchanger, ion exchange on resin the ion in former water, after making water obtain softening, discharge from interchanger top.
3. the external counter-current regeneration technique of ion exchange resin according to claim 1, is characterized in that: the conveying liquid of described B step is the former water entering before ion-exchanger.
4. the external counter-current regeneration technique of ion exchange resin according to claim 1, is characterized in that: the regenerated liquid flow velocity of described C step is 4-8m/h.
5. the external counter-current regeneration technique of ion exchange resin according to claim 1, is characterized in that: described D step, the water inlet of purge tank is the conveying liquid that holding tank is discharged.
6. the external counter-current regeneration technique of ion exchange resin according to claim 1, is characterized in that: the injection of described D step is carried, and conveying liquid used is soft water.
7. the external counter-current regeneration technique of ion exchange resin according to claim 1, is characterized in that: the scavenging solution recovery that described D step purge tank is discharged is used for preparing regenerated liquid and recycles.
8. the external counter-current regeneration technique of ion exchange resin according to claim 1, is characterized in that: the below of described holding tank, regenerating tank and purge tank is provided with one-way cock.
9. the external counter-current regeneration technique of ion exchange resin according to claim 8, is characterized in that: described one-way cock is fin roller valve.
10. according to the external counter-current regeneration technique of the ion exchange resin described in claim 1-9 any one, it is characterized in that: be applicable to all water treatment ion-exchangers.
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| CN201410264988.2A CN104003478B (en) | 2014-06-16 | 2014-06-16 | The external counter-current regeneration technique of ion exchange resin |
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| CN104003478B CN104003478B (en) | 2015-12-02 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018171068A1 (en) * | 2017-03-23 | 2018-09-27 | 南京大学 | Ion exchange resin packed-bed countercurrent regeneration device and use method thereof |
| CN110152379A (en) * | 2019-05-13 | 2019-08-23 | 大唐淮南洛河发电厂 | A kind of resin regenerating device being convenient for changing strainer |
| CN112237816A (en) * | 2019-07-19 | 2021-01-19 | 赤壁市银顺科技有限公司 | Rotary kiln flue gas desulfurization method and ion exchanger used for same |
| CN112264112A (en) * | 2020-09-29 | 2021-01-26 | 中信建设有限责任公司 | Resin fluidized bed system for water treatment |
| CN114163685A (en) * | 2020-09-10 | 2022-03-11 | 阳江核电有限公司 | Waste resin regeneration treatment method |
| CN115254203A (en) * | 2022-09-27 | 2022-11-01 | 南京霖厚环保科技有限公司 | Double-column series-connection circulation alternate continuous operation ion exchange system |
| CN117209012A (en) * | 2023-11-06 | 2023-12-12 | 墨之道(山东)测控设备有限公司 | Industrial circulating cooling water sterilization and hardness removal device and treatment method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992134B (en) * | 2010-09-29 | 2012-08-29 | 周麟 | Regeneration method of ion exchange resin for desalination |
| CN203525729U (en) * | 2013-09-27 | 2014-04-09 | 山东福田药业有限公司 | Water-saving device for cleaning ion exchange resin |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018171068A1 (en) * | 2017-03-23 | 2018-09-27 | 南京大学 | Ion exchange resin packed-bed countercurrent regeneration device and use method thereof |
| US11103865B2 (en) | 2017-03-23 | 2021-08-31 | Nanjing Normal University | Fixed bed counter-current regeneration device of ion exchange resin and application method of fixed bed counter-current regeneration device |
| CN110152379A (en) * | 2019-05-13 | 2019-08-23 | 大唐淮南洛河发电厂 | A kind of resin regenerating device being convenient for changing strainer |
| CN112237816A (en) * | 2019-07-19 | 2021-01-19 | 赤壁市银顺科技有限公司 | Rotary kiln flue gas desulfurization method and ion exchanger used for same |
| CN114163685A (en) * | 2020-09-10 | 2022-03-11 | 阳江核电有限公司 | Waste resin regeneration treatment method |
| CN112264112A (en) * | 2020-09-29 | 2021-01-26 | 中信建设有限责任公司 | Resin fluidized bed system for water treatment |
| CN115254203A (en) * | 2022-09-27 | 2022-11-01 | 南京霖厚环保科技有限公司 | Double-column series-connection circulation alternate continuous operation ion exchange system |
| CN117209012A (en) * | 2023-11-06 | 2023-12-12 | 墨之道(山东)测控设备有限公司 | Industrial circulating cooling water sterilization and hardness removal device and treatment method |
| CN117209012B (en) * | 2023-11-06 | 2024-03-01 | 墨之道(山东)测控设备有限公司 | Industrial circulating cooling water sterilization and hardness removal device and treatment method |
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| CN104003478B (en) | 2015-12-02 |
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