CN1689977A - Method for producing drinking water containing calcium and magnesium ions by ion-exchange - Google Patents
Method for producing drinking water containing calcium and magnesium ions by ion-exchange Download PDFInfo
- Publication number
- CN1689977A CN1689977A CN 200410013716 CN200410013716A CN1689977A CN 1689977 A CN1689977 A CN 1689977A CN 200410013716 CN200410013716 CN 200410013716 CN 200410013716 A CN200410013716 A CN 200410013716A CN 1689977 A CN1689977 A CN 1689977A
- Authority
- CN
- China
- Prior art keywords
- exchange resin
- drinking water
- containing calcium
- magnesium ions
- water
- 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.)
- Granted
Links
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The ion exchange process of producing drinking water containing calcium and magnesium ions includes first treating anionic exchange resin with sodium chloride solution of 5-10 % concentration to prepare chlorine type alkaline anionic exchange resin, leading pre-treated water into the chlorine type alkaline anionic exchange resin exchanger for ion exchange to produce drinking water containing calcium and magnesium ions, and cleaning and regenerating used chlorine type alkaline anionic exchange resin with sodium chloride solution of 5-10 % concentration for reuse. The process can maintain effective Ca, Mg and other components, and is simple, low in cost and pollution-less.
Description
(I) field of the invention
The invention relates to a water treatment method, in particular to a drinking water treatment method.
(II) background of the invention
Bottled or barreled drinking water currently sold in the market may be classified into mineral water, purified water, and mineralized water. The purified water can be divided into pure desalted water and drinking water containing calcium and magnesium ions. The production process of demineralized water used in the production ofdrinking water is characterized by that on the basis of typical industrial first-grade demineralized water treatment method including the processes of cation exchange → carbon dioxide removal → anion exchange, the pretreatment of removing iron and manganese and filtering active carbon is added in the front-end, and after-treatment processes of removing salt, adding active carbon, UV deodorization, sterilization and disinfection, etc. are added. The process for producing desalinated water is a well-established and well-known process. In the existing drinking water containing calcium and magnesium ions, soluble calcium and magnesium substances meeting the national drinking water sanitary standard are added into the desalted water, or the desalted water is mineralized to obtain the drinking water.
Mineralized soluble calcium bicarbonate [ Ca (HCO)]is contained in tap water, deep well water and other drinking water sources3)2]Magnesium bicarbonate [ Mg (HCO)3)2]I.e. containing calcium ions (Ca)+) And magnesium ion (Mg)+) These ions are very important for human health, but they are precipitated by the formation of precipitates after water is heated, and not only the purpose of supplementing calcium and magnesium with drinking water is not achieved, but also scale is generated.
In the general demineralized water production method, the bicarbonate radical is removed, and the calcium ion and the magnesium ion are also removed through cation exchange → carbon dioxide removal → anion exchange. And the regeneration of the anion resin uses sodium hydroxide solution to convert the anion exchange resin into alkaline resin.
(III) summary of the invention
The invention aims to provide a method for producing drinking water containing calcium and magnesium ions by ion exchange, which can retain effective components in water, simplify the treatment process and reduce the treatment cost.
The purpose of the invention is realized as follows: firstly, treating strong-base or weak-base anion exchange resin with 5-10% sodium chloride solution, wherein the reaction formula is as follows: preparing chlorine type strong-basicity or weak-basicity anion exchange resin, introducing the water after pretreatment into the chlorine type basic anion exchange resin exchanger for ion exchange, and the reaction formula is as follows: making into drinking water containing calcium and magnesium ions, regenerating the exchanged chlorine type basic anion exchange resin with 5-10% sodium chloride solution, cleaning, and introducing into the next stepAnd (5) exchanging and circulating.
The invention may also include such features:
1. the cleaning after the regeneration of the chlorine-type basic anion exchange resin comprises the steps of performing countercurrent cleaning by using water with the flow direction opposite to the flow direction of the regeneration liquid and performing concurrent cleaning by using water with the flow direction same as the flow direction of the water during the exchange.
2. The chlorine type basic anion exchange resin exchanger is any one of a fixed bed exchanger, a floating bed exchanger, a moving bed exchanger or a fluid bed exchanger.
The invention has the advantages that:
1. high safety, sodium chloride as regenerant, no toxicity and no side effect. The calcium and magnesium ions in the water produced by the method of the invention are naturally present in the water and do not need to be regulated again. The addition amount and the operation requirements of the water making method of adding the calcium and magnesium soluble salt substances after the desalting are very strict.
2. The quality of drinking water can be improved, and the drinking water produced by the method can achieve good effect of supplementing elements such as calcium, magnesium and the like necessary for human bodies.
3. Compared with the demineralized water process, the process flow is simple, the investment is less, and the cost is low. The processes of cation exchange, carbon dioxide removal and re-investment or water mineralization are cancelled, and an acid-base regeneration system and a regeneration process are cancelled; the investment of construction capital is reduced, and a cation resin and a cation exchanger, a carbon dioxide remover, an acid-base neutralization pool during regeneration, an acid storage tank, an acid metering box, a flowmeter, an ejector, a water pump, a fan and the like are omitted; the production cost is saved, and because the production flow is simplified and the intermediate links are reduced, the consumption of acid, alkali, water, energy and the like is greatly reduced, and the whole production cost is reduced.
4. The pollution to the environment is eliminated.
(IV) specific embodiment
The invention is described in more detail below by way of example:
selecting any one of anion exchange resin 201 × 7, 201 × 4, 202 × 2, D202, D203, 331, 302 × 2, D301, D311, etc., treating the anion exchange resin with 5-10% sodium chloride solution to obtain chlorine type basic anion exchange resin.
Wherein RY is chlorine type or oxyhydrogen type strong-alkaline or weak-alkaline anion exchange resin, NaCl is regenerant, RCl is chlorine type alkaline anion exchange resin, and NaY is regeneration waste liquid.
Leading the tap water or deep well water after pre-pretreatment into an exchanger filled with chlorine type alkaline anion exchange resin for ion exchange to prepare drinking water containing calcium and magnesium ions, wherein the exchanger is any one of a fixed bed exchanger, a floating bed exchanger, a moving bed exchanger or a fluid bed exchanger for ion exchange.
The general reaction formula is as follows:
wherein M is calcium or magnesium cation; y is an anion.
The specific reaction formula is as follows:
Ca(HCO3)2(HCO3)2CaCl2
2Na(HSiO3) (HSiO3)22NaCl
wherein 6RCl is chlorine type basic anion exchange resin, Ca (HCO)3)2、MgSO4、Na(HSiO3) As a soluble salt in water, R6 (HCO)3)2、R6SO4、R6(HSiO3)2For spent resin, NaCl, CaCl2、MgCl2Is the chloride of calcium and magnesium contained in water.
The flow rate during ion exchange is adjusted according to the loading or height of the resin and the content of anions in raw water, and is generally 10-30 m/h; the water pressure during exchange is 0.15-0.5 MPa.
Regenerating the exchanged chlorine type basic anion exchange resin by using a sodium chloride solution with the concentration of 5-10%. Regeneration can be selected from concurrent flow and countercurrent flow, and can be dynamic regeneration or static regeneration. In order to ensure the stability of the resin, the regeneration temperature should be controlled below 30 ℃. The regenerated resin is washed, and the washing comprises the steps of carrying out countercurrent washing by using water with the flow direction opposite to the flow direction of the regenerated liquid and carrying out concurrent washing by using water with the flow direction same as the flow direction of the water during exchange.
Claims (3)
1. A method for producing drinking water containing calcium and magnesium ions by ion exchange is characterized in that: firstly, treating strong-base or weak-base anion exchange resin with 5-10% sodium chloride solution, wherein the reaction formula is as follows: preparing chlorine type strong-basicity or weak-basicity anion exchange resin, introducing the water after pretreatment into the chlorine type basic anion exchange resin exchanger for ion exchange, and the reaction formula is as follows: making into drinking water containing calcium and magnesium ions, regenerating the exchanged chlorine type basic anion exchange resin with 5-10% sodium chloride solution, cleaning, and entering into the next exchange cycle.
2. The method for producing drinking water containing calcium and magnesium ions by ion exchange as set forth in claim 1, wherein: the cleaning after the regeneration of the chlorine-type basic anion exchange resin comprises the steps of performing countercurrent cleaning by using water with the flow direction opposite to the flow direction of the regeneration liquid and performing concurrent cleaning by using water with the flow direction same as the flow direction of the water during the exchange.
3. The method for producing drinking water containing calcium and magnesium ions by ion exchange according to claim 1 or 2, wherein: the chlorine type basic anion exchange resin exchanger is any one of a fixed bed exchanger, a floating bed exchanger, a moving bed exchanger or a fluid bed exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410013716 CN1275869C (en) | 2004-04-28 | 2004-04-28 | Method for producing drinking water containing calcium and magnesium ions by ion-exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410013716 CN1275869C (en) | 2004-04-28 | 2004-04-28 | Method for producing drinking water containing calcium and magnesium ions by ion-exchange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1689977A true CN1689977A (en) | 2005-11-02 |
| CN1275869C CN1275869C (en) | 2006-09-20 |
Family
ID=35345787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410013716 Expired - Fee Related CN1275869C (en) | 2004-04-28 | 2004-04-28 | Method for producing drinking water containing calcium and magnesium ions by ion-exchange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1275869C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102947227A (en) * | 2010-06-21 | 2013-02-27 | 太平洋水泥株式会社 | Calcium removal method |
| CN103771665A (en) * | 2014-02-14 | 2014-05-07 | 刘奕彤 | Method for combined treatment of high-salt-content water |
| CN104261596A (en) * | 2014-10-23 | 2015-01-07 | 湖北君集水处理有限公司 | Method for removing nitrate nitrogen from effluents of sewage plant with resin and method for treating resin regenerating liquid |
| CN111762847A (en) * | 2019-04-02 | 2020-10-13 | 上海凯鑫分离技术股份有限公司 | Resourceful treatment process of industrial high-concentration brine |
-
2004
- 2004-04-28 CN CN 200410013716 patent/CN1275869C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102947227A (en) * | 2010-06-21 | 2013-02-27 | 太平洋水泥株式会社 | Calcium removal method |
| CN105327719A (en) * | 2010-06-21 | 2016-02-17 | 太平洋水泥株式会社 | Calcium removal method |
| CN103771665A (en) * | 2014-02-14 | 2014-05-07 | 刘奕彤 | Method for combined treatment of high-salt-content water |
| CN103771665B (en) * | 2014-02-14 | 2016-08-17 | 刘奕彤 | A kind of method of haline water combined treatment |
| CN104261596A (en) * | 2014-10-23 | 2015-01-07 | 湖北君集水处理有限公司 | Method for removing nitrate nitrogen from effluents of sewage plant with resin and method for treating resin regenerating liquid |
| CN111762847A (en) * | 2019-04-02 | 2020-10-13 | 上海凯鑫分离技术股份有限公司 | Resourceful treatment process of industrial high-concentration brine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1275869C (en) | 2006-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2294129C (en) | Water treatment process | |
| CN103214115B (en) | Water treatment method of strong acid cation exchange resin incomplete regeneration | |
| WO2002000551A2 (en) | A process and apparatus for brine purification | |
| CN105439341A (en) | Salt-containing wastewater treatment system and treatment method | |
| CN102659264B (en) | Ion exchange pretreatment method of softened/demineralized water | |
| CN113562924A (en) | Treatment system and method for resource utilization of high-salinity wastewater in ferrous metallurgy | |
| CN112875803A (en) | Circulating carbon dioxide regeneration ion exchange system and process capable of simultaneously realizing water body purification and carbon emission reduction | |
| CN113461236A (en) | Zero discharge system that high salt waste water of power plant divides matter to handle | |
| Verdickt et al. | Applicability of ion exchange for NOM removal from a sulfate-rich surface water incorporating full reuse of the brine | |
| Höll | CARIX process—A novel approach to desalination by ion exchange | |
| CN205442916U (en) | Contain salt effluent disposal system | |
| KR101258730B1 (en) | Method for the treatment of tetraalkylammonium ion-containing development waste liquor | |
| CN1689977A (en) | Method for producing drinking water containing calcium and magnesium ions by ion-exchange | |
| KR101280357B1 (en) | Ion-exchange water softening system and process re-using concentrate and brine waste | |
| CN210796035U (en) | High salt water recycling system that polycrystalline silicon production process produced | |
| Hirsimaki et al. | Process simulation of high pH reverse osmosis systems to facilitate reuse of coal seam gas associated water | |
| CN113522373B (en) | Method for removing inorganic salt in mannose mother liquor by using ionic resin | |
| CN108675466A (en) | A kind of preprocess method preventing fouling membrane in coal chemical industry recirculated water reuse | |
| CN106673290A (en) | Zero-discharge treatment process for crushed coal pressurized gasification wastewater | |
| CN103449627B (en) | Wastewater treatment method | |
| CN113461237A (en) | Zero discharge system for salt wastewater treatment | |
| Tiger et al. | Demineralizing solutions by a two-step ion exchange process | |
| CN1689467A (en) | Non-tobacco health caring herbal cigarette | |
| Pollio et al. | Tertiary treatment of municipal sewage effluents | |
| Khan et al. | An overview of conventional and advanced water defluoridation techniques |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060920 |