CN111233093A - Water filtration and purification system and method based on multi-group ion exchange and water purifier - Google Patents
Water filtration and purification system and method based on multi-group ion exchange and water purifier Download PDFInfo
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- CN111233093A CN111233093A CN202010183956.5A CN202010183956A CN111233093A CN 111233093 A CN111233093 A CN 111233093A CN 202010183956 A CN202010183956 A CN 202010183956A CN 111233093 A CN111233093 A CN 111233093A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 364
- 238000005342 ion exchange Methods 0.000 title claims abstract description 130
- 238000000746 purification Methods 0.000 title claims abstract description 70
- 238000001914 filtration Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008929 regeneration Effects 0.000 claims abstract description 238
- 238000011069 regeneration method Methods 0.000 claims abstract description 238
- -1 hydrogen ions Chemical class 0.000 claims abstract description 118
- 238000005341 cation exchange Methods 0.000 claims abstract description 106
- 238000010612 desalination reaction Methods 0.000 claims abstract description 102
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 50
- 239000001257 hydrogen Substances 0.000 claims abstract description 50
- 150000002500 ions Chemical class 0.000 claims abstract description 46
- 238000005349 anion exchange Methods 0.000 claims abstract description 44
- 150000003839 salts Chemical class 0.000 claims abstract description 42
- 238000011033 desalting Methods 0.000 claims abstract description 30
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 27
- 239000003011 anion exchange membrane Substances 0.000 claims description 66
- 239000012528 membrane Substances 0.000 claims description 62
- 239000003729 cation exchange resin Substances 0.000 claims description 34
- 239000003957 anion exchange resin Substances 0.000 claims description 30
- 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 claims description 26
- 229940023913 cation exchange resins Drugs 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims 2
- 230000007774 longterm Effects 0.000 abstract description 10
- 239000002351 wastewater Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000002378 acidificating effect Effects 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
-
- 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
- B01J49/30—Electrical regeneration
-
- 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
- C02F2001/427—Treatment of water, waste water, or sewage by ion-exchange using mixed beds
-
- 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
- C02F2303/14—Maintenance of water treatment installations
Abstract
A water filtration and purification system, a water filtration and purification method and a water purifier based on multi-group ion exchange are provided, wherein the water purifier carries out desalination and water purification through the water filtration and purification system based on the multi-group ion exchange, the water filtration and purification system is provided with a plurality of groups of ion exchange regeneration units, each group of ion exchange regeneration units is provided with a desalination water path and a regeneration water path, the desalination water path is provided with a cation exchange unit and an anion exchange unit, and the regeneration water path is provided with a first regeneration water path and a second regeneration water path. The raw water is directly desalted through the multiple groups of ion exchange regeneration units, no wastewater is generated in the desalting process, the desalting and water purifying efficiency is improved, hydrogen ions and hydroxyl ions are generated through electrolysis, salt positive ions and salt negative ions in the cation exchange unit and the anion exchange unit after long-term desalting are replaced, the replacement frequency of a water filtering and purifying system is reduced, and the service life of the water purifier is prolonged.
Description
Technical Field
The invention relates to the technical field of water purifiers, in particular to a water filtering and purifying system and method based on multi-group ion exchange and a water purifier.
Background
Most of the existing ion exchange water purifiers adopt a single ion exchange filter element to respectively carry out filtration treatment on anions and cations so as to achieve the purpose of water purification, the water purification speed of the single group of ion exchange filter elements is too low to support the water demand of large flux, and the ion exchange filter elements need to be replaced after working for a certain time so as to maintain the normal water purification performance of the water purifier, so that the replacement cost is high.
Therefore, aiming at the defects of the prior art, the water filtering and purifying system, the method and the water purifier based on the multi-group ion exchange are provided.
Disclosure of Invention
One of the objectives of the present invention is to provide a multi-ion exchange-based water filtration and purification system, which can directly desalinate raw water to generate pure water, further improve the efficiency of desalination and water production, and can reversely electrolyze hydrogen ions and hydroxyl ions to replace positive salt ions and negative salt ions in a cation exchange unit and an anion exchange unit after long-term desalination, thereby improving the utilization rate of the water filtration and purification system and reducing the replacement frequency of the water filtration and purification system.
The above object of the present invention is achieved by the following technical measures.
A water filtration and purification system based on multi-group ion exchange is provided with a plurality of groups of ion exchange regeneration units. Water purification is carried out simultaneously through a plurality of groups of ion exchange regeneration units, and the desalination and water purification efficiency is improved.
Preferably, each group of ion exchange regeneration units is provided with a desalination water path and a regeneration water path. Desalting is carried out through a desalting water path, and electrolytic regeneration of hydrogen ions and hydroxyl ions is carried out through a regeneration water path.
Preferably, each group of desalination water paths is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is clamped between a first cation exchange membrane and a second cation exchange membrane, the anion exchange unit is clamped between a first anion exchange membrane and a second anion exchange membrane, and the first cation exchange membrane is attached to the first anion exchange membrane. The first cation exchange membrane and the first anion exchange membrane which are tightly attached can reduce the resistance during electrolysis and improve the electrolysis efficiency.
The first cation exchange membrane, the second cation exchange membrane and the cation exchange unit form a first desalination water path during desalination, the first anion exchange membrane, the second anion exchange membrane and the anion exchange unit form a second desalination water path during desalination, and raw water is discharged as pure water after passing through the first desalination water path and the second desalination water path.
The regeneration water path is provided with a first regeneration water path and a second regeneration water path, the second anion exchange membrane forms part of the structure of the first regeneration water path, the second cation exchange membrane forms part of the structure of the second regeneration water path, and the regeneration water is discharged as concentrated water after passing through the first regeneration water path and the second regeneration water path in sequence.
Preferably, the ion exchange regeneration units are arranged in 2-10 groups.
Preferably, a plurality of groups of ion exchange regeneration units are arranged in parallel.
Preferably, a common first regeneration water path is present between the plurality of groups of ion exchange regeneration units, and the regeneration water enters from the first regeneration water path and is discharged by being branched from the second regeneration water path of each group.
Preferably, each group of ion exchange regeneration units is respectively provided with a positive plate and a negative plate for electrolyzing water, the positive plate is arranged on one side of each group of first regeneration water paths far away from the anion exchange membrane, and the negative plate is assembled on one side of each group of second regeneration water paths far away from the cation exchange membrane.
Preferably, a positive plate and a plurality of negative plates are arranged between the plurality of groups of ion exchange regeneration units, the positive plate is arranged on one side, far away from the anion exchange membrane, of the shared first regeneration water channel, and one negative plate is respectively assembled on one side, far away from the cation exchange membrane, of each group of second regeneration water channels.
Preferably, in the regeneration water path, voltage is applied to each group of ion exchange regeneration units individually when water is electrolyzed.
In another preferred mode, in the regeneration water path, a voltage is uniformly applied to the plurality of groups of ion exchange regeneration units when water is electrolyzed.
Preferably, the cation exchange unit is provided as a cation exchange resin.
Preferably, the cation exchange resin is one of a strongly acidic cation exchange resin or a weakly acidic cation exchange resin, or a combination of both.
Preferably, the anion exchange unit is provided as an anion exchange resin.
Preferably, the anion exchange resin is one of a strongly basic anion exchange resin or a weakly basic anion exchange resin, or a combination of both.
The invention relates to a water filtration and purification system based on multi-group ion exchange. Water purification is carried out simultaneously through a plurality of groups of ion exchange regeneration units, and the desalination and water purification efficiency is improved. Each group of ion exchange regeneration units are provided with a desalination water path and a regeneration water path, desalination is carried out simultaneously through the multiple groups of ion exchange regeneration units, no wastewater is produced in the desalination process, the desalination efficiency is high, hydrogen ions and hydroxyl ions are generated through electrolysis, salt positive ions and salt negative ions in the cation exchange units and the anion exchange units after long-term desalination are replaced, and the replacement frequency of the water filtration and purification system is reduced.
The invention also aims to provide a water filtration and purification method based on multi-group ion exchange, which adopts a water filtration and purification system based on multi-group ion exchange to directly desalt and purify raw water to generate pure water with high desalting efficiency, and also generates hydrogen ions and hydroxyl ions through electrolysis to replace salt positive ions and salt negative ions in a cation exchange unit and an anion exchange unit after long-term desalination, thereby reducing the replacement frequency of the water filtration and purification system.
The above object of the present invention is achieved by the following technical measures.
The water filtration purification method based on the multi-group ion exchange is characterized in that the water filtration purification is carried out through a water filtration purification system based on the multi-group ion exchange, wherein the water filtration purification system is provided with a plurality of groups of ion exchange regeneration units.
In the desalination process, the multiple groups of regeneration water channels are closed, no electrolysis voltage is applied, and raw water is discharged as pure water after passing through the first desalination water channel and the second desalination water channel of each group of desalination water channels.
In each group of first desalination water channels, positive salt ions to be desalinated in raw water are replaced by hydrogen ions in the cation exchange unit, the positive salt ions are adsorbed by the cation exchange unit, the hydrogen ions are replaced, and the replaced hydrogen ions enter corresponding second desalination water channels along with the raw water; in each group of second desalination water paths, the salt anions in the raw water are replaced by hydroxide ions in the anion exchange units, the salt anions are adsorbed by the anion exchange units, and the hydroxide ions are replaced; the hydroxyl ions react with the hydrogen ions to form water, which is discharged as pure water.
In the regeneration process, the multiple groups of desalination water paths are closed, electrolysis voltage is applied, and the regenerated water enters from each group of first regenerated water paths and is discharged from each corresponding group of second regenerated water paths in a shunting manner.
Under the condition of applying electrolytic voltage, water generated by hydrogen ions and hydroxyl ions permeating through multiple groups of first cation exchange membranes, first anion exchange membranes and hydroxyl ions in the desalting process is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolytic voltage, the hydroxyl ions move towards the positive plate, in the process of moving the hydroxyl ions, the water enters the multiple groups of anion exchange membranes through the first anion exchange membranes to replace salt anions in the anion exchange resins, and the replaced salt anions enter the multiple groups of first regenerated water paths through the second anion exchange membranes under the electric attraction of the positive plate.
Meanwhile, hydrogen ions move towards the negative electrode, in the process of moving the hydrogen ions, the hydrogen ions enter the multiple groups of cation exchange resins through the first cation exchange membrane to replace salt positive ions in the cation exchange resins, and the replaced salt positive ions enter the multiple groups of second regeneration water paths through the second cation exchange membrane under the electric attraction of the negative electrode plate.
In the plurality of sets of second regeneration water channels, the replaced salt positive ions and the replaced salt negative ions are combined, and finally, the salt positive ions and the salt negative ions are discharged from the plurality of sets of second regeneration water channels as concentrated water.
The invention relates to a water filtration purification method based on multi-group ion exchange. The raw water is directly desalted and purified by the multiple groups of ion exchange regeneration units to generate pure water, the desalting efficiency is improved, hydrogen ions and hydroxyl ions are generated by electrolysis, and salt positive ions and salt negative ions in the cation exchange units and the anion exchange units after long-term desalting are replaced, so that the replacement frequency of the water filtration and purification system is reduced.
Another object of the present invention is to provide a water purifier provided with a water filtration purification system based on multi-group ion exchange, which can directly desalt and purify raw water to generate pure water with high desalination efficiency, and can replace salt positive ions and salt negative ions in a cation exchange unit and an anion exchange unit after long-term desalination by generating hydrogen ions and hydroxyl ions through electrolysis to prolong the service life of the water purifier.
The above object of the present invention is achieved by the following technical measures.
Provided is a water purifier which is provided with a water filtration purification system based on multi-group ion exchange and carries out water purification through the water filtration purification system.
Preferably, the multi-group ion exchange based water filtration purification system is provided with a plurality of groups of ion exchange regeneration units. Water purification is carried out simultaneously through a plurality of groups of ion exchange regeneration units, and the desalination and water purification efficiency is improved.
Preferably, each group of ion exchange regeneration units is provided with a desalination water path and a regeneration water path. Desalting is carried out through a desalting water path, and electrolytic regeneration of hydrogen ions and hydroxyl ions is carried out through a regeneration water path.
Preferably, each group of desalination water paths is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is clamped between a first cation exchange membrane and a second cation exchange membrane, the anion exchange unit is clamped between a first anion exchange membrane and a second anion exchange membrane, and the first cation exchange membrane is attached to the first anion exchange membrane. The first cation exchange membrane and the first anion exchange membrane which are tightly attached can reduce the resistance during electrolysis and improve the electrolysis efficiency.
The first cation exchange membrane, the second cation exchange membrane and the cation exchange unit form a first desalination water path during desalination, the first anion exchange membrane, the second anion exchange membrane and the anion exchange unit form a second desalination water path during desalination, and raw water is discharged as pure water after passing through the first desalination water path and the second desalination water path.
The regeneration water path is provided with a first regeneration water path and a second regeneration water path, the second anion exchange membrane forms part of the structure of the first regeneration water path, the second cation exchange membrane forms part of the structure of the second regeneration water path, and the regeneration water is discharged as concentrated water after passing through the first regeneration water path and the second regeneration water path in sequence.
Preferably, the ion exchange regeneration units are arranged in 2-10 groups.
Preferably, a plurality of groups of ion exchange regeneration units are arranged in parallel.
Preferably, a first regeneration water path is shared among the plurality of groups of ion exchange regeneration units, and regeneration water enters from the first regeneration water path and is discharged from the second regeneration water path of each group.
Preferably, each group of ion exchange regeneration units is respectively provided with a positive plate and a negative plate for electrolyzing water, the positive plate is arranged on one side of each group of first regeneration water paths far away from the anion exchange membrane, and the negative plate is assembled on one side of each group of second regeneration water paths far away from the cation exchange membrane.
Preferably, a positive plate and a plurality of negative plates are arranged between the plurality of groups of ion exchange regeneration units, the positive plate is arranged on one side, far away from the anion exchange membrane, of the shared first regeneration water channel, and one negative plate is respectively assembled on one side, far away from the cation exchange membrane, of each group of second regeneration water channels.
Preferably, in the regeneration water path, voltage is applied to each group of ion exchange regeneration units individually when water is electrolyzed.
In another preferred mode, in the regeneration water path, a voltage is uniformly applied to the plurality of groups of ion exchange regeneration units when water is electrolyzed.
Preferably, the cation exchange unit is provided as a cation exchange resin.
Preferably, the cation exchange resin is one of a strongly acidic cation exchange resin or a weakly acidic cation exchange resin, or a combination of both.
Preferably, the anion exchange unit is provided as an anion exchange resin.
Preferably, the anion exchange resin is one of a strongly basic anion exchange resin or a weakly basic anion exchange resin, or a combination of both.
The invention discloses a water purifier which is provided with a water filtering and purifying system based on multiple groups of ion exchange, wherein the water filtering and purifying system is provided with multiple groups of ion exchange and regeneration units, each group of ion exchange and regeneration units are provided with a desalination water path and a regeneration water path, the desalination water path is provided with a cation exchange unit and an anion exchange unit, and the regeneration water path is provided with a first regeneration water path and a second regeneration water path. The raw water is directly desalted through the multiple groups of ion exchange regeneration units, no wastewater is generated in the desalting process, the desalting and water purifying efficiency is improved, hydrogen ions and hydroxyl ions are generated through electrolysis, salt positive ions and salt negative ions in the cation exchange unit and the anion exchange unit after long-term desalting are replaced, and the service life of the water purifier is prolonged.
Drawings
The invention is further illustrated by means of the attached drawings, the content of which is not in any way limiting.
FIG. 1 is a schematic diagram of desalination conditions of a filtered water purification system of two sets of ion exchange regeneration units.
Fig. 2 is a schematic diagram of the regeneration conditions of the filtered water purification system of two sets of ion exchange regeneration units.
Fig. 3 is a schematic diagram of two groups of ion exchange regeneration units sharing a first regeneration water circuit in embodiment 2.
In fig. 1 to 3, the following are included:
a first desalination water path 100,
A cation exchange unit 110, a first cation exchange membrane 120, a second cation exchange membrane 130,
A second desalination water channel 200,
An anion exchange unit 210, a first anion exchange membrane 220, a second anion exchange membrane 230,
A first regeneration water path 300 and a second regeneration water path 400.
Detailed Description
The invention is further illustrated by the following examples.
Example 1.
A water filtration and purification system based on multi-group ion exchange is provided with a plurality of groups of ion exchange regeneration units. Water purification is carried out simultaneously through a plurality of groups of ion exchange regeneration units, and the desalination and water purification efficiency is improved. The multiple groups of ion exchange regeneration units can be arranged into 2-10 groups, and the two groups of ion exchange regeneration units are taken as an example in the embodiment to describe the multiple groups of ion exchange water filtration purification system.
In this embodiment, each group of ion exchange regeneration units is provided with a desalination water path and a regeneration water path. Desalting is carried out through a desalting water path, and electrolytic regeneration of hydrogen ions and hydroxyl ions is carried out through a regeneration water path.
In this embodiment, each set of desalination water channels is provided with a cation exchange unit 110 and an anion exchange unit 210, as shown in fig. 1, the cation exchange unit 110 is sandwiched between a first cation exchange membrane 120 and a second cation exchange membrane 130, the anion exchange unit 210 is sandwiched between a first anion exchange membrane 220 and a second anion exchange membrane 230, and the first cation exchange membrane 120 is attached to the first anion exchange membrane 220. The first cation exchange membrane 120 and the first anion exchange membrane 220 which are closely attached can reduce the resistance during electrolysis and improve the electrolysis efficiency.
The first cation exchange membrane 120, the second cation exchange membrane 130, and the cation exchange unit 110 form a first desalination water path 100 during desalination, the first anion exchange membrane 220, the second anion exchange membrane 230, and the anion exchange unit 210 form a second desalination water path 200 during desalination, and raw water passes through the first desalination water path 100 and the second desalination water path 200 and is discharged as pure water. The desalination working condition of a group of ion exchange regeneration units is that each group of ion exchange regeneration units are mutually independent in the desalination process, and the desalination is carried out through respective structures without mutual influence.
The regeneration water passage is provided with a first regeneration water passage 300 and a second regeneration water passage 400, and as shown in fig. 2, the second anion exchange membrane 230 forms a part of the structure of the first regeneration water passage 300, the second cation exchange membrane 130 forms a part of the structure of the second regeneration water passage 400, and the regeneration water passes through the first regeneration water passage 300 and the second regeneration water passage 400 in this order and is discharged as concentrated water. The regeneration working condition of a group of ion exchange regeneration units is that each group of ion exchange regeneration units are mutually independent in the regeneration process, and carry out electrolytic regeneration through respective structures without mutual influence.
The two groups of ion exchange regeneration units of the embodiment are arranged in parallel. The cation exchange unit 110, the anion exchange unit 210, the first cation exchange membrane 120, the first anion exchange membrane 220, the second cation exchange membrane 130 and the second anion exchange membrane 230 of each group of ion exchange regeneration units are arranged in parallel.
In this embodiment, each group of ion exchange regeneration units is respectively provided with a positive electrode plate and a negative electrode plate for electrolyzing water, the positive electrode plate is disposed on one side of each group of first regeneration water paths 300 away from the anion exchange membrane, and the negative electrode plate is assembled on one side of each group of second regeneration water paths 400 away from the cation exchange membrane.
The positive plate and the negative plates are arranged between the multiple groups of ion exchange regeneration units, the positive plate is arranged on one side, away from the anion exchange membrane, of the shared first regeneration water channel, and one side, away from the cation exchange membrane, of each group of second regeneration water channels is respectively provided with one negative plate.
In the regeneration water path of the present embodiment, a voltage is applied individually to each group of ion exchange regeneration units when electrolyzing water.
The cation exchange unit 110 of the present embodiment is provided as a cation exchange resin.
The cation exchange resin of this embodiment is provided as a strongly acidic cation exchange resin, and it should be noted that the cation exchange resin may be provided as a weakly acidic cation exchange resin, or a mixture of a strongly acidic cation exchange resin and a weakly acidic cation exchange resin. The composition is not limited to one of the present embodiments.
The anion exchange unit 210 of the present embodiment is provided as an anion exchange resin.
The anion exchange resin of this embodiment is configured as a strongly basic anion exchange resin, it should be noted that the anion exchange resin may also be configured as a weakly basic anion exchange resin, or be composed of a mixture of a strongly basic anion exchange resin and a weakly basic anion exchange resin, and the composition is not limited to one of the embodiments.
In the desalination process, the two regeneration water paths are closed, no electrolysis voltage is applied, and the raw water passes through the first desalination water path 100 and the second desalination water path 200 of the two desalination water paths and then is discharged as pure water.
In each group of the first desalination water paths 100, positive salt ions to be desalinated in the raw water are replaced by hydrogen ions in the cation exchange unit 110, the positive salt ions are adsorbed by the cation exchange unit 110, the hydrogen ions are replaced, and the replaced hydrogen ions enter the corresponding second desalination water paths 200 along with the raw water; in each group of second desalination water paths 200, the salt anions in the raw water are replaced by hydroxide ions in the anion exchange unit 210, the salt anions are adsorbed by the anion exchange unit 210, and the hydroxide ions are replaced; the hydroxyl ions react with the hydrogen ions to form water, which is discharged as pure water.
During regeneration, the two sets of desalination water paths are closed, electrolysis voltage is applied, and the regenerated water enters from the two sets of first regenerated water paths 300 and is discharged from the corresponding second regenerated water paths 400.
Under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxyl ions permeating through the multiple groups of first cation exchange membranes 120 and first anion exchange membranes 220 in the desalination process is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolysis voltage, the hydroxyl ions move towards the positive plates, in the process of moving the hydroxyl ions, the water enters the multiple groups of anion exchange membranes through the first anion exchange membranes 220 to replace salt negative ions in the anion exchange resins, and the replaced salt negative ions enter the multiple groups of first regenerated water paths 300 through the second anion exchange membranes 230 under the electric attraction of the positive plates.
Meanwhile, the hydrogen ions move toward the negative electrode, and in the process of moving the hydrogen ions, the hydrogen ions enter the multiple groups of cation exchange resins through the first cation exchange membrane 120 to replace the salt positive ions in the cation exchange resins, and under the electric attraction of the negative electrode plate, the replaced salt positive ions enter the multiple groups of second regeneration water channels 400 through the second cation exchange membrane 130.
In the two sets of second regeneration water passages 400, the replaced salt positive ions and salt negative ions are combined, and finally, the water is discharged as concentrated water from the two sets of second regeneration water passages 400.
The water filtering and purifying system based on the multi-group ion exchange is provided with two groups of ion exchange regeneration units. Water purification is carried out simultaneously through two groups of ion exchange regeneration units, and the desalination and water purification efficiency is improved. Each group of ion exchange regeneration units is provided with a desalination water path and a regeneration water path, desalination is simultaneously carried out through the two groups of ion exchange regeneration units, no wastewater is produced in the desalination process, the desalination efficiency is high, hydrogen ions and hydroxyl ions are generated through electrolysis, salt positive ions and salt negative ions in the cation exchange unit 110 and the anion exchange unit 210 after long-term desalination are replaced, and the replacement frequency of the water filtration and purification system is reduced.
Example 2.
A multi-group ion exchange based water filtration purification system, as shown in fig. 3, differs from example 1 in that: in the present embodiment, a common first regeneration water path 300 is provided between the two sets of ion exchange regeneration units, and regeneration water is introduced from the first regeneration water path 300 and is discharged by being branched from the second regeneration water path 400 of each set.
According to the water filtering and purifying system based on the multiple groups of ion exchange, the first regeneration water path shared by each group of ion exchange regeneration units exists, the regenerated water enters from the first regeneration water path and is discharged from the second regeneration water path of each group, the purpose that the first regeneration water path completes the ion replacement regeneration of the water filtering and purifying system can be achieved, and the ion replacement efficiency is improved.
Example 3.
A multi-group ion exchange based water filtration purification system, which is different from the embodiment 1 in that: in the regeneration water path of the present embodiment, a voltage is applied to a plurality of groups of ion exchange regeneration units in a unified manner when water is electrolyzed.
According to the water filtering and purifying system based on the multiple groups of ion exchange, voltage is uniformly applied to each group of ion exchange regeneration units in the regeneration water path, so that the ion replacement regeneration of each ion exchange regeneration unit is realized, and the ion replacement efficiency is improved.
Example 4.
A water filtration purification method based on multi-group ion exchange is characterized in that water filtration purification is carried out through a water filtration purification system based on multi-group ion exchange, wherein the water filtration purification system is provided with a plurality of groups of ion exchange regeneration units.
In the desalination process, the multiple groups of regeneration water channels are closed, no electrolysis voltage is applied, and raw water is discharged as pure water after passing through the first desalination water channel and the second desalination water channel of each group of desalination water channels.
In each group of first desalination water channels, positive salt ions to be desalinated in raw water are replaced by hydrogen ions in the cation exchange unit, the positive salt ions are adsorbed by the cation exchange unit, the hydrogen ions are replaced, and the replaced hydrogen ions enter corresponding second desalination water channels along with the raw water; in each group of second desalination water paths, the salt anions in the raw water are replaced by hydroxide ions in the anion exchange units, the salt anions are adsorbed by the anion exchange units, and the hydroxide ions are replaced; the hydroxyl ions react with the hydrogen ions to form water, which is discharged as pure water.
In the regeneration process, the multiple groups of desalination water paths are closed, electrolysis voltage is applied, and the regenerated water enters from each group of first regeneration water paths and is discharged from each corresponding group of second regeneration water paths.
Under the condition of applying electrolytic voltage, water generated by hydrogen ions and hydroxyl ions permeating through multiple groups of first cation exchange membranes, first anion exchange membranes and hydroxyl ions in the desalting process is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolytic voltage, the hydroxyl ions move towards the positive plate, in the process of moving the hydroxyl ions, the water enters the multiple groups of anion exchange membranes through the first anion exchange membranes to replace salt anions in the anion exchange resins, and the replaced salt anions enter the multiple groups of first regenerated water paths through the second anion exchange membranes under the electric attraction of the positive plate.
Meanwhile, hydrogen ions move towards the negative electrode, in the process of moving the hydrogen ions, the hydrogen ions enter the multiple groups of cation exchange resins through the first cation exchange membrane to replace salt positive ions in the cation exchange resins, and the replaced salt positive ions enter the multiple groups of second regeneration water paths through the second cation exchange membrane under the electric attraction of the negative electrode plate.
In the plurality of sets of second regeneration water channels, the replaced salt positive ions and the replaced salt negative ions are combined, and finally, the salt positive ions and the salt negative ions are discharged from the plurality of sets of second regeneration water channels as concentrated water.
The invention relates to a water filtration purification method based on multi-group ion exchange. The raw water is directly desalted and purified by the multiple groups of ion exchange regeneration units to generate pure water, the desalting efficiency is improved, hydrogen ions and hydroxyl ions are generated by electrolysis, and salt positive ions and salt negative ions in the cation exchange units and the anion exchange units after long-term desalting are replaced, so that the replacement frequency of the water filtration and purification system is reduced.
Example 5.
A water purifier is provided with a water filtration and purification system based on multi-group ion exchange, and water is purified by the water filtration and purification system.
The water filtration and purification system of the water purifier in this embodiment is provided with a plurality of groups of ion exchange regeneration units. Water purification is carried out simultaneously through a plurality of groups of ion exchange regeneration units, and the desalination and water purification efficiency is improved.
In this embodiment, each group of ion exchange regeneration units is provided with a desalination water path and a regeneration water path. Desalting is carried out through a desalting water path, and electrolytic regeneration of hydrogen ions and hydroxyl ions is carried out through a regeneration water path.
In this embodiment, each group of desalination water paths is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is clamped between a first cation exchange membrane and a second cation exchange membrane, the anion exchange unit is clamped between a first anion exchange membrane and a second anion exchange membrane, and the first cation exchange membrane is attached to the first anion exchange membrane. The first cation exchange membrane and the first anion exchange membrane which are tightly attached can reduce the resistance during electrolysis and improve the electrolysis efficiency.
In this embodiment, each of the first cation exchange membrane, the second cation exchange membrane, and the cation exchange unit forms a first desalination water path during desalination, the first anion exchange membrane, the second anion exchange membrane, and the anion exchange unit forms a second desalination water path during desalination, and raw water passes through the first desalination water path and the second desalination water path and is then discharged as pure water.
In this embodiment, each group of regeneration water channels is provided with a first regeneration water channel and a second regeneration water channel, the second anion exchange membrane forms a partial structure of the first regeneration water channel, the second cation exchange membrane forms a partial structure of the second regeneration water channel, and the regeneration water passes through the first regeneration water channel and the second regeneration water channel in sequence and is then discharged as concentrated water.
In this embodiment, the ion exchange regeneration units are set to 10 groups, it should be noted that the ion exchange regeneration units may be set to 2 groups, 4 groups or 6 groups, and the number of the ion exchange regeneration units is set according to actual needs, and is not limited to one of the embodiments.
The two groups of ion exchange regeneration units of the embodiment are arranged in parallel. The cation exchange unit, the anion exchange unit, the first cation exchange membrane, the first anion exchange membrane, the second cation exchange membrane and the second anion exchange membrane of each group of ion exchange regeneration units are arranged in parallel.
In addition, a common first regeneration water passage may be provided between the plurality of groups of ion exchange regeneration units, and the regeneration water may be introduced from the first regeneration water passage and discharged by being branched from the second regeneration water passage of each group of ion exchange regeneration units.
Each group of ion exchange regeneration units in the embodiment is respectively provided with a positive plate and a negative plate for electrolyzing water, the positive plate is arranged on one side of each group of first regeneration water paths far away from an anion exchange membrane, and the negative plate is assembled on one side of each group of second regeneration water paths far away from a cation exchange membrane.
The positive plate and the negative plates are arranged between the multiple groups of ion exchange regeneration units, the positive plate is arranged on one side, away from the anion exchange membrane, of the shared first regeneration water channel, and one side, away from the cation exchange membrane, of each group of second regeneration water channels is respectively provided with one negative plate.
In the regeneration water path of the present embodiment, a voltage is applied individually to each group of ion exchange regeneration units when electrolyzing water.
In the regeneration water path, a voltage may be applied to a plurality of groups of ion exchange regeneration units at the same time when water is electrolyzed.
The cation exchange unit of this example was provided as a cation exchange resin.
The cation exchange resin of this embodiment is provided as a strongly acidic cation exchange resin, and it should be noted that the cation exchange resin may be provided as a weakly acidic cation exchange resin, or a mixture of a strongly acidic cation exchange resin and a weakly acidic cation exchange resin. The composition is not limited to one of the present embodiments.
Preferably, the anion exchange unit is provided as an anion exchange resin.
The anion exchange resin of this embodiment is configured as a strongly basic anion exchange resin, it should be noted that the anion exchange resin may also be configured as a weakly basic anion exchange resin, or be composed of a mixture of a strongly basic anion exchange resin and a weakly basic anion exchange resin, and the composition is not limited to one of the embodiments.
The water purifier of this embodiment is provided with the drainage clean system based on multiunit ion exchange, and this drainage clean system is provided with multiunit ion exchange regeneration unit, and wherein every group ion exchange regeneration unit is provided with desalination water route and regeneration water route, and the desalination water route is provided with cation exchange unit, anion exchange unit, and the regeneration water route is equipped with first regeneration water route and second regeneration water route. The raw water is directly desalted through the multiple groups of ion exchange regeneration units, no wastewater is generated in the desalting process, the desalting and water purifying efficiency is improved, hydrogen ions and hydroxyl ions are generated through electrolysis, salt positive ions and salt negative ions in the cation exchange unit and the anion exchange unit after long-term desalting are replaced, and the service life of the water purifier is prolonged.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (11)
1. A drainage clean system based on multiunit ion exchange which characterized in that: a plurality of groups of ion exchange regeneration units are arranged.
2. The multi-bank ion exchange based water filtration purification system of claim 1, wherein: each group of ion exchange regeneration units is provided with a desalination water path and a regeneration water path;
the desalting water path is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is clamped between a first cation exchange membrane and a second cation exchange membrane, the anion exchange unit is clamped between a first anion exchange membrane and a second anion exchange membrane, and the first cation exchange membrane is attached to the first anion exchange membrane;
the first cation exchange membrane, the second cation exchange membrane and the cation exchange unit form a first desalination water channel during desalination, the first anion exchange membrane, the second anion exchange membrane and the anion exchange unit form a second desalination water channel during desalination, and raw water is discharged as pure water after passing through the first desalination water channel and the second desalination water channel;
the regeneration water path is provided with a first regeneration water path and a second regeneration water path, the second anion exchange membrane forms part of the structure of the first regeneration water path, the second cation exchange membrane forms part of the structure of the second regeneration water path, and the regeneration water is discharged as concentrated water after passing through the first regeneration water path and the second regeneration water path in sequence.
3. The multi-bank ion exchange based water filtration purification system of claim 2, wherein: the ion exchange regeneration units are arranged into 2-10 groups.
4. The multi-bank ion exchange based water filtration purification system of claim 1, wherein: the multiple groups of ion exchange regeneration units are arranged in parallel.
5. The multi-bank ion exchange based water filtration purification system of claim 1, wherein: and a shared first regeneration water path exists among the multiple groups of ion exchange regeneration units, and the regeneration water enters from the first regeneration water path and is discharged from the second regeneration water path of each group in a shunting manner.
6. The multi-bank ion exchange based water filtration purification system of claim 4, wherein: each group of ion exchange regeneration units are respectively provided with a positive plate and a negative plate for electrolyzing water, the positive plate is arranged on one side of each group of first regeneration water paths far away from an anion exchange membrane, and the negative plate is assembled on one side of each group of second regeneration water paths far away from a cation exchange membrane.
7. The multi-bank ion exchange based water filtration purification system of claim 5, wherein: be provided with a positive plate and a plurality of negative plate between the multiunit ion exchange regeneration unit, the positive plate sets up in the one side of keeping away from anion exchange membrane in first regeneration water route of sharing, and one side of keeping away from cation exchange membrane in every group second regeneration water route assembles a negative plate respectively.
8. The multi-bank ion exchange based water filtration purification system according to claim 6 or 7, wherein: and applying voltage to each group of ion exchange regeneration units individually or uniformly.
9. The multi-bank ion exchange based water filtration purification system of claim 2, wherein: the cation exchange unit is set as cation exchange resin, and the cation exchange resin is one of strong acid cation exchange resin or weak acid cation exchange resin, or the combination of the two;
the anion exchange unit is arranged as anion exchange resin, and the anion exchange resin is one of strong-base anion exchange resin or weak-base anion exchange resin, or the combination of the two.
10. A multi-bank ion exchange based water filtration purification method for purification by the multi-bank ion exchange based water filtration purification system of any one of claims 1 to 9, wherein:
in the desalting process, a plurality of groups of regeneration water channels are closed, no electrolysis voltage is applied, and raw water passes through a first desalting water channel and a second desalting water channel of each group of desalting water channels and then is discharged as pure water;
in each group of first desalination water channels, positive salt ions to be desalinated in raw water are replaced by hydrogen ions in the cation exchange unit, the positive salt ions are adsorbed by the cation exchange unit, the hydrogen ions are replaced, and the replaced hydrogen ions enter corresponding second desalination water channels along with the raw water; in each group of second desalination water paths, the salt anions in the raw water are replaced by hydroxide ions in the anion exchange units, the salt anions are adsorbed by the anion exchange units, and the hydroxide ions are replaced; the hydroxyl ions and the hydrogen ions react to form water which is discharged in the form of pure water;
in the regeneration process, a plurality of groups of desalination water paths are closed, electrolysis voltage is applied, and regenerated water enters from each group of first regeneration water paths and is discharged from each corresponding group of second regeneration water paths;
under the condition of applying electrolytic voltage, water generated by hydrogen ions and hydroxyl ions permeating through a plurality of groups of first cation exchange membranes and first anion exchange membranes in the desalting process is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolytic voltage, the hydroxyl ions move towards a positive plate, in the process of the hydroxyl ions moving, the water enters a plurality of groups of anion exchange membranes through the first anion exchange membranes to replace salt anions in the anion exchange resins, and the replaced salt anions enter a plurality of groups of first regeneration water paths through a second anion exchange membrane under the electric attraction of the positive plate;
meanwhile, hydrogen ions move towards the negative electrode, in the process of moving the hydrogen ions, the hydrogen ions enter a plurality of groups of cation exchange resins through the first cation exchange membrane to replace salt positive ions in the cation exchange resins, and the replaced salt positive ions enter a plurality of groups of second regeneration water paths through the second cation exchange membrane under the electric attraction of the negative electrode plate;
in the plurality of sets of second regeneration water channels, the replaced salt positive ions and the replaced salt negative ions are combined, and finally, the salt positive ions and the salt negative ions are discharged from the plurality of sets of second regeneration water channels as concentrated water.
11. A water purifier is characterized in that: the multi-bank ion exchange based water filtration purification system of any one of claims 1 to 9.
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Effective date of registration: 20211026 Address after: 528308 No.2, North Xinxi 4th Road, Xiashi village, Lunjiao street, Shunde District, Foshan City, Guangdong Province Applicant after: Guangdong Chestnut Technology Co.,Ltd. Address before: 528300 Nepheline Village Committee, Lunjiao Sub-district Office, Shunde District, Foshan City, Guangdong Province Applicant before: FOSHAN VIOMI ELECTRICAL TECHNOLOGY Co.,Ltd. Applicant before: Chen Xiaoping |