CN113262826A - Cation resin regeneration method - Google Patents
Cation resin regeneration method Download PDFInfo
- Publication number
- CN113262826A CN113262826A CN202011168101.1A CN202011168101A CN113262826A CN 113262826 A CN113262826 A CN 113262826A CN 202011168101 A CN202011168101 A CN 202011168101A CN 113262826 A CN113262826 A CN 113262826A
- Authority
- CN
- China
- Prior art keywords
- resin
- regeneration
- concentrated brine
- washed
- brine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000011347 resin Substances 0.000 title claims abstract description 33
- 229920005989 resin Polymers 0.000 title claims abstract description 33
- 238000011069 regeneration method Methods 0.000 title abstract description 14
- 150000001768 cations Chemical class 0.000 title abstract description 7
- 239000012267 brine Substances 0.000 claims abstract description 22
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 4
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 4
- 125000002091 cationic group Chemical group 0.000 claims description 9
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 10
- 230000008929 regeneration Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000011734 sodium Substances 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 239000000072 sodium resin Substances 0.000 description 2
- 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 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical group [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/50—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents
- B01J49/53—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents for cationic exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A cation resin regeneration method adopts strong brine for regeneration. During regeneration, the resin is washed by strong brine with the volume being 3-5 times of that of the resin for 5-10 min in a counter-current manner, then is statically soaked for 2-3 h, and then is washed by deionized water until the pH value is 6-7. The invention can effectively regenerate the cation resin, the regenerated resin has good exchange performance, the invention can prevent the damage of concentrated hydrochloric acid to operators in the traditional method, and can fully utilize the concentrated brine generated in the wastewater treatment process to regenerate the resin, thereby effectively saving production resources.
Description
Technical Field
The invention relates to the technical field of resin regeneration treatment, in particular to a cation resin regeneration method.
Background
In the deep treatment process of wastewater, the wastewater needs to be subjected to hardness reduction treatment before entering a nanofiltration membrane or a reverse osmosis membrane, wherein resin exchange is one of hardness reduction safety measures, the resin is a sodium type cation exchange resin, and the working principle of the resin is that the hardness component Ca in water is reduced2+、Mg2+With Na in the resin+Exchange phase to adsorb Ca in water2+、Mg2+The water is softened. If the sodium resin is represented by RNA, the exchange process is as follows:
2RNa+Ca2+＝＝R2Ca+2Na+
2RNa+Mg2+＝＝R2Mg+2Na+
after the sodium ion exchange resin is deactivated, it is regenerated to restore its exchange capacity.
In the prior art, hydrochloric acid is generally adopted for regeneration, and the original exchange performance of the resin is recovered by acid washing. However, in the acid washing process, the consumption of hydrochloric acid is large, and since hydrochloric acid is a hazardous chemical substance, strong acid cleaning is corrosive, and the acid is easy to burn an operator after long-term use, especially improper operation.
Therefore, the invention aims to develop a numerical regeneration method with higher safety degree so as to better meet the actual production requirement.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for regenerating a cationic resin, so as to solve the problems in the background art.
The technical problem solved by the invention is realized by adopting the following technical scheme:
a cation resin regeneration method adopts strong brine for regeneration.
Preferably, the concentration of the concentrated brine is 1.5-2.0%.
Preferably, the concentration of the concentrated brine is 1.5%.
Preferably, the strong brine is from strong brine produced at the RO membrane strong brine end of the wastewater advanced treatment system.
Preferably, after washing with concentrated brine with the volume of 3-5 times of that of the resin for 5-10 min in a counter-current manner, standing and soaking for 2-3 h, and then washing with deionized water until the pH value is 6-7.
Has the advantages that: the regeneration method of the cationic resin can effectively reduce the frequency and the use amount of hydrochloric acid pickling, reduce the risk operation frequency and simultaneously effectively reduce the cost of subsequent desalting operation. Through the treatment of the invention, the cation resin can recover the exchange performance of the raw materials, and is convenient and rapid.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Examples
In the method for regenerating the cationic resin, which is described in this embodiment, a Na type cationic resin commonly used in a wastewater advanced treatment system of this company is taken as an example, and the resin is regenerated by using a concentrated brine with a concentration of 1.5%, wherein the concentrated brine is derived from a concentrated brine generated at a concentrated water end of an RO membrane of the wastewater advanced treatment system, and during regeneration, the resin is washed by a concentrated brine with a volume of 3-5 times of that of the resin in a counter-current manner for 5-10 min, then is statically soaked for 2-3 h, and then is washed by deionized water until the pH is 6-7.
The sodium resin is represented by RNA, and the exchange process is as follows:
R2Ca+2NaCl＝2RNa+CaCl2
R2Mg+2NaCl＝2RNa+MgCl2
the resin can recover the original exchange performance after the regeneration treatment of the strong brine, and the strong brine basically has no harm to operators.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The method for regenerating the cationic resin is characterized in that the cationic resin is regenerated by adopting concentrated brine.
2. The method for regenerating a cationic resin according to claim 1, wherein the concentration of the concentrated brine is 1.0 to 2.0%.
3. The method of claim 1, wherein the concentrated brine has a concentration of 1.5%.
4. The method for regenerating the cationic resin according to claim 1, wherein the concentrated brine is the concentrated brine generated from the concentrated water end of an RO membrane of the wastewater advanced treatment system.
5. The method for regenerating the cationic resin according to claim 1, wherein the resin is washed with a concentrated brine of 3 to 5 times the volume of the resin in a counter-current manner for 5 to 10min, then is statically soaked for 2 to 3 hours, and is then washed with deionized water until the pH is 6 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011168101.1A CN113262826A (en) | 2020-10-28 | 2020-10-28 | Cation resin regeneration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011168101.1A CN113262826A (en) | 2020-10-28 | 2020-10-28 | Cation resin regeneration method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113262826A true CN113262826A (en) | 2021-08-17 |
Family
ID=77227773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011168101.1A Pending CN113262826A (en) | 2020-10-28 | 2020-10-28 | Cation resin regeneration method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113262826A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045360A (en) * | 1989-03-09 | 1990-09-19 | 邹萃林 | The renovation process of pure water preparation intermediate ion exchange resin |
| CN101829610A (en) * | 2009-02-04 | 2010-09-15 | 漂莱特公司 | Water softener regeneration |
| CN102227262A (en) * | 2008-12-08 | 2011-10-26 | 康世富科技公司 | Process for regeneration of ion exchange resin using sulfurous acid |
| CN106140328A (en) * | 2016-08-18 | 2016-11-23 | 南京福碧源环境技术有限公司 | The renovation process of softener resin |
| CN206570062U (en) * | 2017-02-16 | 2017-10-20 | 北京康洁之晨水处理技术有限公司 | The equipment that external cleaning full chamber bed counter-current regeneration softens water treatment technology can be achieved |
| CN108786933A (en) * | 2018-06-19 | 2018-11-13 | 中盐金坛盐化有限责任公司 | A kind of low sodium type cation resin regeneration agent and its preparation method and application |
| CN208711736U (en) * | 2018-05-25 | 2019-04-09 | 谷林 | A kind of bracket in salt-dissolving bucket in water treatment system for hemodialysis |
| CN110624611A (en) * | 2019-03-27 | 2019-12-31 | 兆德（南通）电子科技有限公司 | Cation resin regeneration process |
-
2020
- 2020-10-28 CN CN202011168101.1A patent/CN113262826A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045360A (en) * | 1989-03-09 | 1990-09-19 | 邹萃林 | The renovation process of pure water preparation intermediate ion exchange resin |
| CN102227262A (en) * | 2008-12-08 | 2011-10-26 | 康世富科技公司 | Process for regeneration of ion exchange resin using sulfurous acid |
| CN101829610A (en) * | 2009-02-04 | 2010-09-15 | 漂莱特公司 | Water softener regeneration |
| CN106140328A (en) * | 2016-08-18 | 2016-11-23 | 南京福碧源环境技术有限公司 | The renovation process of softener resin |
| CN206570062U (en) * | 2017-02-16 | 2017-10-20 | 北京康洁之晨水处理技术有限公司 | The equipment that external cleaning full chamber bed counter-current regeneration softens water treatment technology can be achieved |
| CN208711736U (en) * | 2018-05-25 | 2019-04-09 | 谷林 | A kind of bracket in salt-dissolving bucket in water treatment system for hemodialysis |
| CN108786933A (en) * | 2018-06-19 | 2018-11-13 | 中盐金坛盐化有限责任公司 | A kind of low sodium type cation resin regeneration agent and its preparation method and application |
| CN110624611A (en) * | 2019-03-27 | 2019-12-31 | 兆德（南通）电子科技有限公司 | Cation resin regeneration process |
Non-Patent Citations (1)
| Title |
|---|
| 刘智安 等, 中国轻工业出版社 * |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210817 |
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| RJ01 | Rejection of invention patent application after publication |