WO2022118348A1 - Ion exchange water purification system and process - Google Patents
Ion exchange water purification system and process Download PDFInfo
- Publication number
- WO2022118348A1 WO2022118348A1 PCT/IT2021/050251 IT2021050251W WO2022118348A1 WO 2022118348 A1 WO2022118348 A1 WO 2022118348A1 IT 2021050251 W IT2021050251 W IT 2021050251W WO 2022118348 A1 WO2022118348 A1 WO 2022118348A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- purification
- valve
- purification device
- designed
- tank element
- 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.)
- Ceased
Links
Classifications
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Definitions
- the present invention refers to an ion exchange water purification system and to a purification process.
- Ion exchange processes are used to remove inorganic contaminants in case they cannot be removed adequately through filtration and sedimentation.
- Object of the present invention is solving the aforementioned prior art problems by providing an ion exchange water purification system which consists in making resin, dyes or chemical products and auxiliary products flow into a collection tank and is able to recover the aforementioned fluids in such a way that recycling can be carried out in a number equal to 5, with a considerable economic saving and lower environmental impact.
- Ion exchange purification is a purification technique for water contaminated by inorganic compounds, heavy metals, radionuclides. It is based on a reversible chemical reaction, in which the mobile ions of a solid matrix are exchanged with the ions having a similar electric charge present in a solution.
- the exchange matrices are generally porous solids, such as natural zeolites and some synthetic resins, made up of complex molecules formed by ions of a certain charge: the ions present in the polluted sewage can take the place of the latter and attach themselves to the resins, from which can be recovered later.
- the selectivity of the exchange process is regulated by controlling the acidity and composition of the solution, as well as by appropriately selecting the resin.
- cation exchange resins replace charged ions with ions having the same charge such as sodium (Na +) or potassium (K +) ions to remove unwanted cations from the water; anion exchange resins, on the other hand, remove ions such as C104- from contaminated groundwater or surface water.
- water softening is one of the most common methods of water treatment with high hardness, the hardness of the water is given by the presence in the solution of calcium Ca ++ and magnesium Mg ++ ions.
- softening agents are materials capable of substituting these ions with other ions previously attached to the resins.
- the saline load remains unchanged overall, but the chemical species change: the ions released by the resins are more soluble and therefore less encrusting; demineralization/deionization; ion exchange (DI) deionizers use synthetic resins similar to those used in water softening.
- DI ion exchange
- DIs Generally adopted for the treatment of waters that have already been pre-filtered, DIs employ a two-stage process to remove, at least theoretically, all the ionic constituents.
- the two basic configurations for deionizers are twin bed and mixed bed configurations; in the first case, separate tanks are provided for the removal of cations and anions, while, in mixed bed deionizers, the anionic and cationic resins are mixed in a single container.
- the purification system 1 comprises:
- the material is inserted into the purification device (3) by using at least one first valve (5) operatively connected with at least one pumping device (7) and purification device (3); at least a second valve (9) operatively connected to the purification device (3) and to the pumping device (7), the second valve (9) is designed to recover and re-insert the material into the purification device (3) from at least one tank element (11); at least one tank element (11) operatively connected to at least a third valve (13), designed to regulate the flow of material, and to at least a fourth valve (15) for regulating the internal flow of the tank element (11) the tank element (11) is designed to collect the material from the purification device (3) by means of the third valve (13); at least one tap (17) designed to introduce, at the end of the purification cycle, the material into a drain (19).
- the water purification process using the purification system (1) comprising the following steps:
- the door of the purification device 3 is opened to insert some "materials" inside the purification device 3, including: dyes or chemicals and auxiliary products, preferably resin, by using a first delivery valve of the flow 5 in the purification device 3 positioned between a pumping device 7 and the purification device 3.
- the second recovery valve 9, connected to the pumping device 7, has an "automatic recovery” function, i.e. it "throws back” in the purification device 3 the aforementioned "materials" which
- the process can be repeated 4/5 times, thus obtaining multiple recycling by collecting the aforementioned "materials" in a recycling tank element 11 connected between a third valve 13 for delivering the flow into the tank element 11 and a fourth valve 15 for adjusting the internal flow of the aforementioned tank element 11.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Water Treatment By Sorption (AREA)
Abstract
A system (1) and an ion exchange water purification process are described; the system (1) comprises: a purification device (3) designed to contain a purification material through the use of a first valve (5) operatively connected to a pumping device (7) and the purification device (3); a second valve (9) operatively connected to the purification device (3) and to the pumping device (7), and designed to recover and re-insert the material into the purification device (3) from a tank element (11); the tank element (11) operatively connected to a third valve (13), designed to regulate the flow of the material, and to a fourth valve (15) for regulating the internal flow of the tank element (11), which is designed to collecting the material from the purification device (3) by means of the third valve (13); and a tap (17).
Description
ION EXCHANGE WATER PURIFICATION SYSTEM AND PROCESS
The present invention refers to an ion exchange water purification system and to a purification process.
Ion exchange processes are used to remove inorganic contaminants in case they cannot be removed adequately through filtration and sedimentation.
They can be used for the removal of arsenic, cadmium, chromium, excesses of fluorides, nitrates, ammonia, rhodium and uranium. Ion exchange is used:
- for the treatment of primary waters;
- for the removal of specific ions from supply or waste water; for the industrial concentration of very diluted solutions.
It is a consolidated and evolving technology thanks to the development of homogeneous granulometry resins.
Object of the present invention is solving the aforementioned prior art problems by providing an
ion exchange water purification system which consists in making resin, dyes or chemical products and auxiliary products flow into a collection tank and is able to recover the aforementioned fluids in such a way that recycling can be carried out in a number equal to 5, with a considerable economic saving and lower environmental impact.
The above and other objects and advantages of the invention, as will emerge from the following description, are achieved with a purification system such as that described in claim 1. Preferred embodiments and non-trivial variants of the present invention form the subject of the dependent claims.
It is understood that all attached claims form an integral part of the present description.
It will be immediately obvious that innumerable variations and modifications (for example relating to shape, dimensions, arrangements and parts with equivalent functionality) can be made to what is been described without departing from the scope of the invention as appears from the attached claims.
The present invention will be better described by some preferred embodiments, provided by way of non-limiting example, with reference to the
attached drawings, in which the only Figure 1 shows a schematic view of an embodiment of the purification system according to the present invention.
Ion exchange purification is a purification technique for water contaminated by inorganic compounds, heavy metals, radionuclides. It is based on a reversible chemical reaction, in which the mobile ions of a solid matrix are exchanged with the ions having a similar electric charge present in a solution.
The exchange matrices are generally porous solids, such as natural zeolites and some synthetic resins, made up of complex molecules formed by ions of a certain charge: the ions present in the polluted sewage can take the place of the latter and attach themselves to the resins, from which can be recovered later.
The selectivity of the exchange process is regulated by controlling the acidity and composition of the solution, as well as by appropriately selecting the resin.
As is known, the classification of the resins used in ion exchange purification is based on two factors.
According to the type of ion exchanged (anion, with negative charge, or cation, with positive charge): cation exchange resins replace charged ions with ions having the same charge such as sodium (Na +) or potassium (K +) ions to remove unwanted cations from the water; anion exchange resins, on the other hand, remove ions such as C104- from contaminated groundwater or surface water.
According to the type of action performed by the functional group: water softening; is one of the most common methods of water treatment with high hardness, the hardness of the water is given by the presence in the solution of calcium Ca ++ and magnesium Mg ++ ions.
The so-called "softening agents" are materials capable of substituting these ions with other ions previously attached to the resins.
The saline load remains unchanged overall, but the chemical species change: the ions released by the resins are more soluble and therefore less encrusting; demineralization/deionization; ion exchange
(DI) deionizers use synthetic resins similar to those used in water softening.
Generally adopted for the treatment of waters that have already been pre-filtered, DIs employ a two-stage process to remove, at least theoretically, all the ionic constituents.
The two basic configurations for deionizers are twin bed and mixed bed configurations; in the first case, separate tanks are provided for the removal of cations and anions, while, in mixed bed deionizers, the anionic and cationic resins are mixed in a single container.
Referring to FIG. 1 it is possible to note that the purification system 1 comprises:
- at least one purification device (3) designed to contain at least one purification material
(not shown), the material is inserted into the purification device (3) by using at least one first valve (5) operatively connected with at least one pumping device (7) and purification device (3); at least a second valve (9) operatively connected to the purification device (3) and to the pumping device (7), the second valve (9) is designed to recover and re-insert the material
into the purification device (3) from at least one tank element (11); at least one tank element (11) operatively connected to at least a third valve (13), designed to regulate the flow of material, and to at least a fourth valve (15) for regulating the internal flow of the tank element (11) the tank element (11) is designed to collect the material from the purification device (3) by means of the third valve (13); at least one tap (17) designed to introduce, at the end of the purification cycle, the material into a drain (19).
Advantageously, the water purification process using the purification system (1) comprising the following steps:
1) the door of the purification device 3 is opened to insert some "materials" inside the purification device 3, including: dyes or chemicals and auxiliary products, preferably resin, by using a first delivery valve of the flow 5 in the purification device 3 positioned between a pumping device 7 and the purification device 3.
2) processing cycle of the purification device
3 according to the same method of the state of the
art reported above, in which the purification device 3 is positioned between the flow delivery valve 5 and a second flow recovery valve 9 from the device purification 3.
3) the second recovery valve 9, connected to the pumping device 7, has an "automatic recovery" function, i.e. it "throws back" in the purification device 3 the aforementioned "materials" which
(according to the processes used in the state of the art ) would be discarded into the sewer 19.
The process can be repeated 4/5 times, thus obtaining multiple recycling by collecting the aforementioned "materials" in a recycling tank element 11 connected between a third valve 13 for delivering the flow into the tank element 11 and a fourth valve 15 for adjusting the internal flow of the aforementioned tank element 11.
4) in the last phase, by means of a manual tap
17, we introduce the waters of the resin or in any case of "materials" no longer reusable into the drainage sewer 19.
Claims
1. Ion exchange water purification system
(1) characterized in that it includes: at least one purification device (3) designed to contain at least one purification material, said material being inserted into said purification device (3) by using at least one first valve (5) operatively connected to at least one pumping device (7) and said purification device (3); at least one second valve (9) operatively connected to said purification device (3) and to said pumping device (7), said second valve (9) being designed to recover and re-insert said material into said purification device (3) from at least one tank element (11); at least one said tank element (ID operatively connected to at least a third valve
(13), designed to regulate the flow of said material, and to at least a fourth valve (15) for regulating the internal flow of said tank element (11), said tank element (11) being designed to collect said material from said purification device (3) by means of said third valve (13);
at least one tap (17) designed to introduce, at the end of the purification cycle, said material into a drain (19).
2. Purification system (1) according to claim 1, characterized in that said material inserted inside said purification device (3) is a dye and/or a chemical product and/or an auxiliary product, preferably resin.
3. Water purification process carried out using the purification system (1) according to claim 1 or 2, the process comprising the steps of: opening the door of the purification device
(3);
- inserting the material inside the purification device (3) by using the first valve device (5); starting the processing cycle of the purification device (3); ending the processing cycle of the purification device (3); recovering the material in the tank element
(11) using the third valve device (13); re-inserting the material by means of the second valve device (9) and the pumping device
(7) into the purification device (3);
repeating the processing cycle of the purification device (3); discharging the material that is no longer reusable through a tap (17) into the drainage system (19).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102020000029720 | 2020-12-03 | ||
| IT102020000029720A IT202000029720A1 (en) | 2020-12-03 | 2020-12-03 | ION EXCHANGE WATER PURIFICATION SYSTEM AND PROCEDURE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022118348A1 true WO2022118348A1 (en) | 2022-06-09 |
Family
ID=74759290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT2021/050251 Ceased WO2022118348A1 (en) | 2020-12-03 | 2021-08-05 | Ion exchange water purification system and process |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | IT202000029720A1 (en) |
| WO (1) | WO2022118348A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991004791A1 (en) * | 1989-10-05 | 1991-04-18 | Crossflow Microfiltration Limited | Causing liquid/solid interaction |
| US20140076817A1 (en) * | 2012-09-17 | 2014-03-20 | Severn Trent Water Purification, Inc. | Method and System for Treating Produced Water |
-
2020
- 2020-12-03 IT IT102020000029720A patent/IT202000029720A1/en unknown
-
2021
- 2021-08-05 WO PCT/IT2021/050251 patent/WO2022118348A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991004791A1 (en) * | 1989-10-05 | 1991-04-18 | Crossflow Microfiltration Limited | Causing liquid/solid interaction |
| US20140076817A1 (en) * | 2012-09-17 | 2014-03-20 | Severn Trent Water Purification, Inc. | Method and System for Treating Produced Water |
Also Published As
| Publication number | Publication date |
|---|---|
| IT202000029720A1 (en) | 2022-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4182676A (en) | Method and system for purifying liquid | |
| US9186665B2 (en) | System for ion exchange resin regeneration and regenerant recovery | |
| US4207397A (en) | Method for recovering and treating brine from water softener regeneration | |
| WO2010122336A2 (en) | Water treatment | |
| Zinkus et al. | Identify appropriate water reclamat’technologies | |
| EP0475289A1 (en) | Method of recovering nickel | |
| Khedr | Membrane methods in tailoring simpler, more efficient, and cost effective wastewater treatment alternatives | |
| Merrill et al. | Field evaluation of arsenic and selenium removal by iron coprecipitation | |
| CN101935111B (en) | Wastewater recycling preparation system with low energy consumption | |
| Verdickt et al. | Applicability of ion exchange for NOM removal from a sulfate-rich surface water incorporating full reuse of the brine | |
| Awadalla et al. | Opportunities for membrane technologies in the treatment of mining and mineral process streams and effluents | |
| WO2022118348A1 (en) | Ion exchange water purification system and process | |
| CN106477762A (en) | Industrial concentrated water softening process and system based on DF tubular membrane | |
| DE2324131A1 (en) | METHOD FOR RECOVERING REGENERATING SOLUTIONS IN ION EXCHANGE SYSTEMS | |
| Christenson et al. | Removal of plutonium from laboratory wastes | |
| Timofeev et al. | Deep treatment of copper plant waste water streams with water recycling | |
| Wang et al. | Total waste recycle system for water purification plant using alum as primary coagulant | |
| Amouamouha et al. | Performance investigation and cost evaluation of nanofiltration membranes in groundwater remediation | |
| Kocaoba et al. | Chromium (III) removal from wastewaters by a weakly acidic resin containing carboxylic groups | |
| Buckley et al. | Selective removal of dissolved toxic metals from groundwater by ultrafiltration in combination with chemical treatment | |
| Stetter et al. | Pilot scale studies on the removal of trace metal contaminations in drinking water treatment using chelating ion-exchange resins | |
| RU2817393C1 (en) | Method of processing liquid radioactive wastes | |
| RU2817393C9 (en) | Method of processing liquid radioactive wastes | |
| Ndlovu | Acid mine drainage treatment technologies | |
| CN212222659U (en) | Flocculent sediment filter equipment in dirty sour treatment technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21752262 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 26/09/2023) |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 21752262 Country of ref document: EP Kind code of ref document: A1 |