CN115069312A - Separation method of ion exchange resin - Google Patents
Separation method of ion exchange resin Download PDFInfo
- Publication number
- CN115069312A CN115069312A CN202110274723.0A CN202110274723A CN115069312A CN 115069312 A CN115069312 A CN 115069312A CN 202110274723 A CN202110274723 A CN 202110274723A CN 115069312 A CN115069312 A CN 115069312A
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- China
- Prior art keywords
- resin
- ion exchange
- exchange resin
- sodium hydroxide
- tower tank
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a separation method of ion exchange resin, which can completely separate male and female tree fingers and shorten the separation time, and comprises the following steps: 1) proportioning a saturated salt solution or a sodium hydroxide solution, wherein the density of the saturated salt solution or the sodium hydroxide solution is more than that of an anion resin and less than that of a cation resin, and the volume of the saturated salt solution or the sodium hydroxide solution is 55-65% of that of the ion exchange resin to be separated; 2) introducing ion exchange resin to be separated, namely saturated or failed ion exchange resin into a container for separation, namely a resin tower tank; 3) enabling the proportioned saturated salt solution or sodium hydroxide solution to flow into the resin tower tank from top to bottom; 4) injecting nitrogen or compressed air into the resin tower tank from the bottom of the resin tower tank, and aerating the resin tower tank for more than 5 minutes; 5) stopping air intake, standing, and observing through a window to ensure that the anion resin and the cation resin are thoroughly separated; 6) and respectively leading out the anion resin and the cation resin. The separation method of the ion exchange resin mainly separates the saturated and failed ion exchange resin.
Description
Technical Field
The invention relates to an ion exchange resin for a water treatment system, in particular to a separation method of the ion exchange resin.
Background
Currently, the common method of ion exchange resin separation in the industry is density separation, i.e.: performing back washing in a resin tower, lifting the resin, standing for 20-30 minutes, and separating by utilizing density difference of the negative resin and the positive resin to finally form a state that the positive resin is on the lower part and the negative resin is on the upper part, and an intermediate layer exists between the negative resin and the positive resin; in the intermediate layer, the male and female resins are still mixed. Therefore, the traditional separation method cannot completely separate the anion resin from the cation resin.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a method for separating an ion exchange resin, which can completely separate an anion resin from a cation resin and can shorten the separation time.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a separation method of ion exchange resin comprises the following steps:
1) proportioning a saturated salt solution or a sodium hydroxide solution, wherein the density of the saturated salt solution or the sodium hydroxide solution is higher than that of an anion resin and lower than that of a cation resin, and the volume of the saturated salt solution or the sodium hydroxide solution is 55-65% of that of the ion exchange resin to be separated;
2) introducing ion exchange resin to be separated, namely saturated or failed ion exchange resin into a container for separation, namely a resin tower tank;
3) enabling the proportioned saturated salt solution or sodium hydroxide solution to flow into the resin tower tank from top to bottom;
4) injecting nitrogen or compressed air into the resin tower tank from the bottom of the resin tower tank, and aerating the resin tower tank for more than 5 minutes;
5) stopping air intake, standing, and observing through a window to ensure that the anion resin and the cation resin are thoroughly separated;
6) and respectively leading out the anion resin and the cation resin.
Preferably, in the above method for separating an ion exchange resin, the amount of intake air in the step 5) is k × (resin amount ÷ 1000) in m 3 K is more than or equal to 0.88 and less than or equal to 1.12.
As a preferable mode, in the separation method of the ion exchange resin, the standing time in the step 5) is less than or equal to 10 minutes.
The invention has the beneficial effects that: according to the invention, by proportioning the saturated salt solution or the sodium hydroxide solution and aerating the interior of the resin tower tank, the state that the cation resin is settled at the bottom and the anion resin is suspended at the upper part is finally formed, so that the anion resin and the cation resin in the saturated and ineffective ion exchange resin are quickly and thoroughly separated, and the regeneration effect of the ion exchange resin is greatly improved.
Drawings
FIG. 1 is a diagram showing the effect of the separation method of the present invention.
Detailed Description
The following will describe in detail a detailed embodiment of the separation method of an ion exchange resin according to the present invention with reference to examples.
The invention relates to a separation method of ion exchange resin, which comprises the following steps:
1) proportioning a saturated salt solution or a sodium hydroxide solution, wherein the density of the saturated salt solution or the sodium hydroxide solution is more than that of the anion resin and less than that of the cation resin, and the volume of the saturated salt solution or the sodium hydroxide solution is 55-65%, preferably 58-62% of that of the ion exchange resin to be separated;
2) introducing ion exchange resin to be separated, namely saturated or failed ion exchange resin into a container for separation, namely a resin tower tank;
3) enabling the proportioned saturated salt solution or sodium hydroxide solution to flow into the resin tower tank from top to bottom;
4) injecting nitrogen or compressed air into the resin tower tank from the bottom of the resin tower tank, aerating the inside of the resin tower tank for 5 minutes or more, wherein the air intake flow is kX (resin amount/1000) and the unit is m 3 K is more than or equal to 0.88 and less than or equal to 1.12; the aeration means that: after nitrogen or compressed air enters a resin tower groove, bubbling is carried out, so that the original mixed anions and cations are separated, the anions float upwards, and the cations keep a precipitation state;
5) stopping air inflow, standing for 10 minutes, and observing through a window, wherein the anion resin and the cation resin in the resin tower groove are completely separated as shown in figure 1;
6) and respectively leading out the anion resin and the cation resin.
In summary, the present invention is only a preferred embodiment, and not intended to limit the scope of the invention, and all equivalent changes and modifications made in the shape, structure, characteristics and spirit of the present invention described in the claims should be included in the scope of the present invention.
Claims (4)
1. A separation method of ion exchange resin comprises the following steps:
1) proportioning a saturated salt solution or a sodium hydroxide solution, wherein the density of the saturated salt solution or the sodium hydroxide solution is more than that of an anion resin and less than that of a cation resin, and the volume of the saturated salt solution or the sodium hydroxide solution is 55-65% of that of the ion exchange resin to be separated;
2) introducing ion exchange resin to be separated, namely saturated or failed ion exchange resin into a container for separation, namely a resin tower tank;
3) enabling the proportioned saturated salt solution or sodium hydroxide solution to flow into the resin tower tank from top to bottom;
4) injecting nitrogen or compressed air into the resin tower tank from the bottom of the resin tower tank, and aerating the resin tower tank for more than 5 minutes;
5) stopping air intake, standing, and observing through a window to ensure that the anion resin and the cation resin are thoroughly separated;
6) and respectively leading out the anion resin and the cation resin.
2. The method for separating an ion exchange resin according to claim 1, wherein: the intake air amount in step 5) is k × (resin amount ÷ 1000) in m 3 K is more than or equal to 0.88 and less than or equal to 1.12.
3. The method for separating an ion exchange resin according to claim 1, wherein: the standing time in the step 5) is less than or equal to 10 minutes.
4. The method for separating an ion exchange resin according to claim 1, 2 or 3, wherein the volume of the saturated salt solution or the sodium hydroxide solution is 58 to 62% of the volume of the ion exchange resin to be separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274723.0A CN115069312A (en) | 2021-03-15 | 2021-03-15 | Separation method of ion exchange resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110274723.0A CN115069312A (en) | 2021-03-15 | 2021-03-15 | Separation method of ion exchange resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115069312A true CN115069312A (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202110274723.0A Pending CN115069312A (en) | 2021-03-15 | 2021-03-15 | Separation method of ion exchange resin |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB985871A (en) * | 1962-03-22 | 1965-03-10 | Ferranti Ltd | Improvements relating to the regeneration of ion exchange resins |
| US3826761A (en) * | 1972-03-01 | 1974-07-30 | Ecodyne Corp | Method of separating cation and anion exchange resins |
| JPS5497579A (en) * | 1978-01-20 | 1979-08-01 | Japan Organo Co Ltd | Separation of cation exchange resin from anion-and cation-exchange resin mixture |
| CN208145991U (en) * | 2018-02-08 | 2018-11-27 | 深圳市中电加美电力技术有限公司 | Power plant's mixed-bed resin regenerates hierarchical system |
| CN111905445A (en) * | 2020-08-21 | 2020-11-10 | 四川省宜宾惠美线业有限责任公司 | Method for separating mixed lipid of anion resin and cation resin |
-
2021
- 2021-03-15 CN CN202110274723.0A patent/CN115069312A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB985871A (en) * | 1962-03-22 | 1965-03-10 | Ferranti Ltd | Improvements relating to the regeneration of ion exchange resins |
| US3826761A (en) * | 1972-03-01 | 1974-07-30 | Ecodyne Corp | Method of separating cation and anion exchange resins |
| JPS5497579A (en) * | 1978-01-20 | 1979-08-01 | Japan Organo Co Ltd | Separation of cation exchange resin from anion-and cation-exchange resin mixture |
| CN208145991U (en) * | 2018-02-08 | 2018-11-27 | 深圳市中电加美电力技术有限公司 | Power plant's mixed-bed resin regenerates hierarchical system |
| CN111905445A (en) * | 2020-08-21 | 2020-11-10 | 四川省宜宾惠美线业有限责任公司 | Method for separating mixed lipid of anion resin and cation resin |
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