CN111233087A - Functional unit transverse type water filtering and purifying system and method and water purifier - Google Patents
Functional unit transverse type water filtering and purifying system and method and water purifier Download PDFInfo
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- CN111233087A CN111233087A CN202010183329.1A CN202010183329A CN111233087A CN 111233087 A CN111233087 A CN 111233087A CN 202010183329 A CN202010183329 A CN 202010183329A CN 111233087 A CN111233087 A CN 111233087A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 306
- 238000001914 filtration Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000008929 regeneration Effects 0.000 claims abstract description 166
- 238000011069 regeneration method Methods 0.000 claims abstract description 166
- -1 salt anion Chemical class 0.000 claims abstract description 124
- 238000005341 cation exchange Methods 0.000 claims abstract description 108
- 238000005349 anion exchange Methods 0.000 claims abstract description 86
- 238000005342 ion exchange Methods 0.000 claims abstract description 72
- 150000002500 ions Chemical class 0.000 claims abstract description 46
- 150000003839 salts Chemical class 0.000 claims abstract description 43
- 239000003011 anion exchange membrane Substances 0.000 claims abstract description 32
- 239000012528 membrane Substances 0.000 claims abstract description 32
- 238000011033 desalting Methods 0.000 claims abstract description 28
- 238000000746 purification Methods 0.000 claims abstract description 28
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 23
- 238000010612 desalination reaction Methods 0.000 claims abstract description 20
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 41
- 239000001257 hydrogen Substances 0.000 claims description 41
- 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 31
- 239000003957 anion exchange resin Substances 0.000 claims description 31
- 239000003729 cation exchange resin Substances 0.000 claims description 31
- 239000002253 acid Substances 0.000 claims 2
- 239000002351 wastewater Substances 0.000 abstract description 11
- 230000002441 reversible effect Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 5
- 230000002378 acidificating effect Effects 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 230000007774 longterm Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000003014 ion exchange membrane Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 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
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/30—Electrical regeneration
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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
- 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
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A water purifier carries out water purification through the water purification system with the transverse functional units, at least one stage of ion exchange regeneration unit is stacked between an anion exchange membrane and a cation exchange membrane of the water purification system, each stage of ion exchange regeneration unit is formed by stacking a cation exchange unit layer and an anion exchange unit layer, and the cation exchange unit layer and the anion exchange unit layer are arranged transversely relative to the water flow direction under the desalting working condition. Carry out the multi-stage filtration desalination to the raw water through this drainage clean system, the desalination in-process does not produce waste water, can further improve the product water quality of pure water, can also reverse electrolysis hydrogen ion and hydroxyl ion, and positive ion of salt and salt anion in cation exchange unit layer, the anion exchange unit layer after will desalinating for a long time replace, improve drainage clean system's utilization ratio, prolong the life of water purifier.
Description
Technical Field
The invention relates to the technical field of water purifiers, in particular to a water filtering and purifying system with a transverse functional unit, a method and a water purifier.
Background
Most of the existing ion exchange water purifiers adopt combined filter elements which are separately processed by anions and cations to purify water, the anions and the cations are separated by ion exchange membranes, if a plurality of combined filter elements are arranged to purify water from tap water, not only the occupied space is large, but also a plurality of groups of ion exchange membranes are required to be arranged to carry out ion exchange, the use cost is high, in the existing ion exchange water purifier technology, the ion exchange combined filter elements need to be replaced after working for a certain time to maintain the normal water purification performance of the water purifier, and the replacement cost is high.
Therefore, it is necessary to provide a system, a method and a water purifier with horizontal functional units for water filtration and purification, which overcome the deficiencies of the prior art.
Disclosure of Invention
One of the objectives of the present invention is to provide a water filtration purification system with horizontal functional units, which can perform multi-stage filtration on raw water, desalinate raw water, generate no wastewater during desalination, further improve the quality of pure water, and can perform reverse electrolysis on hydrogen ions and hydroxyl ions to replace positive salt ions and negative salt ions in a cation exchange unit layer and an anion exchange unit layer after long-term desalination, thereby improving the utilization rate of the water filtration purification system and reducing the replacement frequency of the water filtration purification system.
The above object of the present invention is achieved by the following technical measures.
At least one stage of ion exchange regeneration unit is stacked between an anion exchange membrane and a cation exchange membrane of the water filtration purification system, and each stage of ion exchange regeneration unit is formed by stacking a cation exchange unit layer and an anion exchange unit layer.
And the cation exchange unit layers and the anion exchange unit layers are transversely arranged relative to the water flow direction under the desalting working condition, and the water flow flows into the next layer from the upper layer.
Preferably, the cation exchange unit layer in each stage of ion exchange regeneration unit is positioned above the anion exchange unit layer.
Preferably, the anion exchange unit layer in each stage of the ion exchange regeneration unit is positioned above the cation exchange unit layer.
Preferably, two to ten stages of ion exchange regeneration units are stacked between the anion exchange membrane and the cation exchange membrane.
And relative to the water flow direction under the desalting working condition, the cation exchange unit layer and the anion exchange unit layer are perpendicular to the water flow direction.
Preferably, the regeneration water path is provided with a first regeneration water path and a second regeneration water path, the anion exchange membrane forms part of the structure of the first regeneration water path, the cation exchange membrane forms part of the structure of the second regeneration water path, and the regeneration water passes through the first regeneration water path and the second regeneration water path in sequence and then is discharged as concentrated water.
Preferably, a positive plate and a negative plate for electrolyzing water are further arranged, the positive plate is arranged on one side of the first regeneration water path far away from the anion exchange membrane, and the negative plate is assembled on one side of the second regeneration water path far away from the cation exchange membrane.
Preferably, the cation exchange unit layer is provided as a cation exchange resin.
Preferably, the cation exchange resin is one of a strongly acidic cation exchange resin and a weakly acidic cation exchange resin, or a combination of both.
Preferably, the anion exchange unit layer 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 the two.
The invention relates to a water filtering and purifying system with transverse functional units, wherein at least one stage of ion exchange regeneration unit is stacked between an anion exchange membrane and a cation exchange membrane, each stage of ion exchange regeneration unit is formed by stacking a cation exchange unit layer and an anion exchange unit, the cation exchange unit layers and the anion exchange unit layers are transversely arranged relative to the water flow direction under the desalting working condition, and the water flow flows into the next layer from the upper layer. Can carry out the multi-stage filtration to the raw water through ion exchange regeneration unit, desalt the raw water, do not produce waste water among the desalination process, can further improve the product water quality of pure water, can also reverse electrolysis hydrogen ion and hydroxyl ion, the positive ion of salt and salt anion in cation exchange unit layer, the anion exchange unit layer after will desalting for a long time replace, improve drainage clean system's utilization ratio, reduce drainage clean system's change frequency.
The invention also aims to provide a water filtering and purifying method with a transverse functional unit, which is characterized in that a water filtering and purifying system with a transverse functional unit is used for purifying water, so that raw water can be subjected to multistage filtration and desalted, no waste water is generated in the desalting process, the water production quality of the pure water can be further improved, hydrogen ions and hydroxyl ions can be electrolyzed reversely, and salt positive ions and salt negative ions in a cation exchange unit layer and an anion exchange unit layer after long-term desalting are replaced, so that the utilization rate of the water filtering and purifying system is improved, and the replacement frequency of the water filtering and purifying system is reduced.
The above object of the present invention is achieved by the following technical measures.
Provides a water filtering and purifying method with a horizontal functional unit, and carries out water purification by a water filtering and purifying system with a horizontal functional unit.
In the desalting process, a regeneration water path is closed, no electrolytic voltage is applied, raw water passes through each stage of ion exchange regeneration unit, positive salt ions to be desalted in the raw water are replaced by hydrogen ions in the cation exchange unit layer in each stage of ion exchange regeneration unit, the positive salt ions are adsorbed by the cation exchange unit layer, the hydrogen ions are replaced, and the replaced hydrogen ions enter the next anion exchange unit layer along with the raw water; in the anion exchange unit layer, the salt anions in the raw water are replaced by hydroxide ions in the anion exchange unit layer, the salt anions are absorbed by the anion exchange unit layer, 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 desalination water path is closed, the electrolysis voltage is applied, and the regeneration water enters from the first regeneration water path and is discharged from the second regeneration water path.
Under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxyl ions between each stage of cation exchange unit layer and anion exchange unit layer is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolysis voltage, the hydroxyl ions move towards the positive plate, salt negative ions in the anion exchange resin are replaced in the process of moving the hydroxyl ions, and the replaced salt negative ions penetrate through the anion exchange membrane to enter the first regeneration water path under the electric attraction of the positive plate. Meanwhile, hydrogen ions move towards the negative plate, positive salt ions in the cation exchange resin are replaced in the hydrogen ion moving process, and the replaced positive salt ions penetrate through the cation exchange membrane and enter the second regeneration water channel under the electric attraction of the negative plate.
In the second regeneration water path, the replaced salt positive ions and salt negative ions are combined, and finally, the salt positive ions and salt negative ions are discharged as concentrated water from the second regeneration water path.
According to the water filtering and purifying method with the transverse functional units, disclosed by the invention, water is purified by the water filtering and purifying system with the transverse functional units, raw water can be subjected to multistage filtration, raw water is desalted, no wastewater is generated in the desalting process, the water production quality of the pure water can be further improved, hydrogen ions and hydroxyl ions can be reversely electrolyzed, and salt positive ions and salt negative ions in a cation exchange unit layer and an anion exchange unit layer after long-term desalting are replaced, so that the utilization rate of the water filtering and purifying system is improved, and the replacement frequency of the water filtering and purifying system is reduced.
Another object of the present invention is to provide a water purifier provided with a water filtration purification system having a horizontal functional unit, which can perform multi-stage filtration of raw water to desalinate raw water, and does not generate wastewater during desalination, thereby further improving the quality of pure water, and can perform reverse electrolysis of hydrogen ions and hydroxyl ions to replace positive salt ions and negative salt ions in a cation exchange unit layer and an anion exchange unit layer after long-term desalination, thereby improving the utilization rate of the water filtration purification system and prolonging 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 provided with a functional unit horizontal type water filtration purification system, by which raw water can be filtered in multiple stages to desalinate the raw water.
Preferably, at least one stage of ion exchange regeneration unit is stacked between the anion exchange membrane and the cation exchange membrane of the water filtration and purification system, and each stage of ion exchange regeneration unit is formed by stacking a cation exchange unit layer and an anion exchange unit layer.
And the cation exchange unit layers and the anion exchange unit layers are transversely arranged relative to the water flow direction under the desalting working condition, and the water flow flows into the next layer from the upper layer.
Preferably, the cation exchange unit layer in each stage of ion exchange regeneration unit is positioned above the anion exchange unit layer.
Preferably, the anion exchange unit layer in each stage of the ion exchange regeneration unit is positioned above the cation exchange unit layer.
Preferably, two to ten stages of ion exchange regeneration units are stacked between the anion exchange membrane and the cation exchange membrane.
And relative to the water flow direction under the desalting working condition, the cation exchange unit layer and the anion exchange unit layer are perpendicular to the water flow direction.
Preferably, the regeneration water path is provided with a first regeneration water path and a second regeneration water path, the anion exchange membrane forms part of the structure of the first regeneration water path, the cation exchange membrane forms part of the structure of the second regeneration water path, and the regeneration water passes through the first regeneration water path and the second regeneration water path in sequence and then is discharged as concentrated water.
Preferably, a positive plate and a negative plate for electrolyzing water are further arranged, the positive plate is arranged on one side of the first regeneration water path far away from the anion exchange membrane, and the negative plate is assembled on one side of the second regeneration water path far away from the cation exchange membrane.
Preferably, the cation exchange unit layer is provided as a cation exchange resin.
Preferably, the cation exchange resin is one of a strongly acidic cation exchange resin and a weakly acidic cation exchange resin, or a combination of both.
Preferably, the anion exchange unit layer 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 the two.
The invention relates to a water purifier which is provided with a water filtering and purifying system with a transverse functional unit, wherein at least one stage of ion exchange and regeneration unit is stacked between an anion exchange membrane and a cation exchange membrane, each stage of ion exchange and regeneration unit is formed by stacking a cation exchange unit layer and an anion exchange unit layer, the cation exchange unit layers and the anion exchange unit layers are transversely arranged relative to the water flow direction under the desalting working condition, and the water flow flows into the next layer from the upper layer. Can carry out the multi-stage filtration to the raw water through this drainage clean system, carry out the desalination to the raw water, the desalination in-process does not produce waste water, can further improve the product water quality of pure water, can also reverse electrolysis hydrogen ion and hydroxyl ion, and positive ion of salt and salt anion in cation exchange unit layer, the anion exchange unit layer after will desalinating for a long time replace, improve drainage clean system's utilization ratio, the life of extension water purifier.
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 a desalination waterway of a water filtration purification system.
Fig. 2 is a schematic diagram of a regeneration water circuit of the water filtration purification system.
Fig. 3 is a schematic diagram of a regeneration water circuit of the water filtration purification system of embodiment 2.
In fig. 1 to 3, there are included:
cation exchange unit layer 100, anion exchange unit layer 200, cation exchange membrane 300, anion exchange membrane 400, first regeneration water route 500, second regeneration water route 600.
Detailed Description
The invention is further illustrated by the following examples.
Example 1.
A water filtering and purifying system with horizontal functional units is characterized in that at least one stage of ion exchange regeneration unit is stacked between an anion exchange membrane 400 and a cation exchange membrane 300, and each stage of ion exchange regeneration unit is formed by stacking a cation exchange unit layer 100 and an anion exchange unit layer 200.
Relative to the water flow direction under the desalination condition, the cation exchange unit layers 100 and the anion exchange unit layers 200 are arranged transversely, and the water flow flows into the next layer from the upper layer.
In this embodiment, a two-stage ion exchange regeneration unit is exemplified. As shown in fig. 1 and 2, two stages of ion exchange regeneration units are stacked between a cation exchange membrane 300 and an anion exchange membrane 400, wherein a cation exchange unit layer 100 of each stage of ion exchange regeneration unit is located on an anion exchange unit layer 200, and the two stages of ion exchange regeneration units are stacked in sequence.
It should be noted that three, six, eight, or ten stages of ion exchange regeneration units may be provided between the cation exchange membrane 300 and the anion exchange membrane 400, and the number of ion exchange regeneration units may be set according to actual needs, and is not limited to one of the embodiments.
Relative to the water flow direction under the desalting condition, the cation exchange unit layer 100 and the anion exchange unit layer 200 of each stage are perpendicular to the water flow direction.
In this embodiment, a regeneration water passage is further provided, the regeneration water passage is provided with a first regeneration water passage 500 and a second regeneration water passage 600, the anion exchange membrane 400 constitutes a part of the structure of the first regeneration water passage 500, the cation exchange membrane 300 constitutes a part of the structure of the second regeneration water passage 600, and the regeneration water passes through the first regeneration water passage 500 and the second regeneration water passage 600 in this order and is discharged as concentrated water.
In this embodiment, a positive electrode plate and a negative electrode plate for electrolyzing water are further provided, the positive electrode plate is disposed on the side of the first regeneration water path 500 away from the anion exchange membrane 400, and the negative electrode plate is mounted on the side of the second regeneration water path 600 away from the cation exchange membrane 300.
In this embodiment, the cation exchange unit layer 100 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.
In this embodiment, the anion exchange unit layer 200 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 desalting process, the regeneration water path is closed, no electrolytic voltage is applied, raw water firstly passes through the cation exchange unit layer 100 and the anion exchange unit layer 200 of the first-stage ion exchange regeneration unit in sequence, undesalted salt positive ions and salt negative ions discharged from the anion exchange unit of the first-stage ions enter the cation exchange unit layer 100 of the second-stage ion exchange regeneration unit, and finally enter the anion exchange unit layer 200 of the second-stage ion exchange regeneration unit, and are finally discharged as pure water.
In the cation exchange unit layer 100 of each stage of ion exchange regeneration unit, positive salt ions to be desalted in raw water are replaced by hydrogen ions in the cation exchange unit layer 100, the positive salt ions are adsorbed by the cation exchange unit layer 100, the hydrogen ions are replaced, and the replaced hydrogen ions enter the anion exchange unit layer 200 of the next layer along with the raw water; in the anion exchange unit layer 200, the salt anions in the raw water are replaced by the hydroxyl ions in the anion exchange unit layer 200, the salt anions are absorbed by the anion exchange unit layer 200, the hydroxyl ions are replaced, and the raw water enters the next-stage ion exchange unit; the hydroxyl ions of the multi-stage ion exchange regeneration unit react with the hydrogen ions to form water, and the water is discharged in the form of pure water.
During regeneration, the desalination water path is closed, an electrolysis voltage is applied, and the regeneration water enters the first regeneration water path 500 and is discharged from the second regeneration water path 600.
Under the condition of applying the electrolysis voltage, the water generated by the hydrogen ions and hydroxyl ions between each stage of the cation exchange unit layer 100 and the anion exchange unit layer 200 is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolysis voltage, the hydroxyl ions move towards the positive plate, the salt anions in the anion exchange resin are replaced in the process of the movement of the hydroxyl ions, and the replaced salt anions enter the first regenerated water path 500 through the anion exchange membrane 400 under the electric attraction of the positive plate. Meanwhile, the hydrogen ions move toward the negative electrode plate, and in the process of moving the hydrogen ions, the positive salt ions in the cation exchange resin are replaced, and under the electrical attraction of the negative electrode plate, the replaced positive salt ions penetrate through the cation exchange membrane 300 and enter the second regeneration water path 600.
In the second regeneration water path 600, the replaced salt positive ions and salt negative ions are combined, and finally discharged as concentrated water from the second regeneration water path 600.
In the water filtration and purification system with horizontal functional units of this embodiment, two stages of ion exchange and regeneration units are stacked between the anion exchange membrane 400 and the cation exchange membrane 300, each stage of ion exchange and regeneration unit is formed by stacking the cation exchange unit layer 100 and the anion exchange unit layer 200, and the cation exchange unit layer 100 and the anion exchange unit layer 200 are both arranged in the horizontal direction relative to the water flow direction under the desalination condition, and the water flow flows from the upper layer to the lower layer. Can carry out the dual filtration to the raw water through ion exchange regeneration unit, desalt the raw water, do not produce waste water among the desalination process, can further improve the product water quality of pure water, can also reverse electrolysis hydrogen ion and hydroxyl ion, positive ion of salt and salt anion in the cation exchange unit layer 100, the anion exchange unit layer 200 after will desalting for a long time replace, improve drainage clean system's utilization ratio, reduce drainage clean system's change frequency.
Example 2.
A horizontal functional unit water filtration and purification system, as shown in fig. 3, and the other features are the same as those of embodiment 1, except that: the anion exchange unit layer 200 in each stage of the ion exchange regeneration unit of this embodiment is located above the cation exchange unit layer 100.
According to the horizontal water filtering and purifying system with the functional units, the anion exchange unit layer 200 in each stage of ion exchange and regeneration unit is positioned above the cation exchange unit layer 100, salt negative ions in raw water can be replaced, salt positive ions are replaced, no wastewater is generated in the desalting process, and the water quality of the pure water can be further improved.
Example 3.
A water filtering and purifying method with horizontal functional units features that a water filtering and purifying system with horizontal functional units is used to desalinate and purify water.
In the desalting process, a regeneration water path is closed, no electrolytic voltage is applied, raw water firstly passes through a cation exchange unit layer and an anion exchange unit layer of a first-stage ion exchange regeneration unit in sequence, undesalted salt positive ions and salt negative ions discharged from the anion exchange unit of first-stage ions enter a cation exchange unit layer of a second-stage ion exchange regeneration unit, finally enter an anion exchange unit layer of the second-stage ion exchange regeneration unit, and so on, the raw water is desalted by multiple layers of the multi-stage ion exchange regeneration unit and then is discharged as pure water.
In the cation exchange unit layer of each stage of ion exchange regeneration unit, positive salt ions to be desalted in raw water are replaced by hydrogen ions in the cation exchange unit layer, the positive salt ions are adsorbed by the cation exchange unit layer, the hydrogen ions are replaced, and the replaced hydrogen ions enter the next anion exchange unit layer along with the raw water; in the anion exchange unit layer, the salt anions in the raw water are replaced by hydroxide ions in the anion exchange unit layer, the salt anions are absorbed by the anion exchange unit layer, the hydroxide ions are replaced, and the raw water enters the next-stage ion exchange unit; by parity of reasoning, the hydroxyl ions and the hydrogen ions of the multistage ion exchange regeneration unit react to form water, and the water is discharged in the form of pure water.
In the regeneration process, the desalination water path is closed, the electrolysis voltage is applied, and the regeneration water enters from the first regeneration water path and is discharged from the second regeneration water path.
Under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxyl ions between each stage of cation exchange unit layer and anion exchange unit layer is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolysis voltage, the hydroxyl ions move towards the positive plate, salt negative ions in the anion exchange resin are replaced in the process of moving the hydroxyl ions, and the replaced salt negative ions penetrate through the anion exchange membrane to enter the first regeneration water path under the electric attraction of the positive plate. Meanwhile, hydrogen ions move towards the negative plate, positive salt ions in the cation exchange resin are replaced in the hydrogen ion moving process, and the replaced positive salt ions penetrate through the cation exchange membrane and enter the second regeneration water channel under the electric attraction of the negative plate.
In the second regeneration water path, the replaced salt positive ions and salt negative ions are combined, and finally, the salt positive ions and salt negative ions are discharged as concentrated water from the second regeneration water path.
According to the water filtering and purifying method with the transverse functional units, water is purified through the water filtering and purifying system with the transverse functional units, the raw water can be subjected to multi-stage filtration, the raw water is desalted, no wastewater is generated in the desalting process, the water quality of the pure water can be further improved, hydrogen ions and hydroxyl ions can be reversely electrolyzed, the positive salt ions and the negative salt ions in the cation exchange unit layer and the anion exchange unit layer after long-term desalting are replaced, the utilization rate of the water filtering and purifying system is improved, and the replacement frequency of the water filtering and purifying system is reduced.
Example 4.
A water purifier is provided with a water filtering and purifying system with a transverse functional unit, wherein at least one stage of ion exchange and regeneration unit is stacked between an anion exchange membrane and a cation exchange membrane of the water filtering and purifying system, and each stage of ion exchange and regeneration unit is formed by stacking a cation exchange unit layer and an anion exchange unit layer. The water filtering and purifying system can be used for carrying out multi-stage filtration on raw water and desalting the raw water.
And the cation exchange unit layers and the anion exchange unit layers are transversely arranged relative to the water flow direction under the desalting working condition, and the water flow flows into the next layer from the upper layer.
In this embodiment, the cation exchange unit layer in each stage of ion exchange regeneration unit is located above the anion exchange unit layer.
It should be noted that the anion exchange unit layer in each stage of ion exchange regeneration unit can also be positioned on the cation exchange unit layer.
In this embodiment, ten stages of ion exchange regeneration units are stacked between the anion exchange membrane and the cation exchange membrane, it should be noted that the ion exchange regeneration units may also be set to be different in two stages, four stages, or six stages, and the number of the ion exchange regeneration units may be set according to actual needs, and is not limited to one of the embodiments.
And relative to the water flow direction under the desalting working condition, the cation exchange unit layer and the anion exchange unit layer are perpendicular to the water flow direction.
In this embodiment, a regeneration water path is further provided, the regeneration water path is provided with a first regeneration water path and a second regeneration water path, the anion exchange membrane forms a partial structure of the first regeneration water path, the cation exchange membrane forms a partial structure of the second regeneration water path, and the regeneration water passes through the first regeneration water path and the second regeneration water path in sequence and is then discharged as concentrated water.
In this embodiment, a positive plate and a negative plate for electrolyzing water are further provided, the positive plate is disposed on one side of the first regeneration water path far away from the anion exchange membrane, and the negative plate is assembled on one side of the second regeneration water path far away from the cation exchange membrane.
In this embodiment, the cation exchange unit layer 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.
In this embodiment, the anion exchange unit layer 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 desalting process, a regeneration water path is closed, no electrolytic voltage is applied, raw water firstly passes through a cation exchange unit layer and an anion exchange unit layer of a first-stage ion exchange regeneration unit in sequence, undesalted salt positive ions and salt negative ions discharged from the anion exchange unit of first-stage ions enter a cation exchange unit layer of a second-stage ion exchange regeneration unit, finally enter an anion exchange unit layer of the second-stage ion exchange regeneration unit, and in the same way, the raw water is desalted by multiple layers of ten-stage ion exchange regeneration units and then is discharged as pure water.
In the cation exchange unit layer of each stage of ion exchange regeneration unit, positive salt ions to be desalted in raw water are replaced by hydrogen ions in the cation exchange unit layer, the positive salt ions are adsorbed by the cation exchange unit layer, the hydrogen ions are replaced, and the replaced hydrogen ions enter the next anion exchange unit layer along with the raw water; in the anion exchange unit layer, the salt anions in the raw water are replaced by hydroxide ions in the anion exchange unit layer, the salt anions are absorbed by the anion exchange unit layer, the hydroxide ions are replaced, and the raw water enters the next-stage ion exchange unit; by analogy, the hydroxyl ions and the hydrogen ions of the ten-stage ion exchange regeneration unit react to form water, and the water is discharged in the form of pure water.
In the regeneration process, the desalination water path is closed, the electrolysis voltage is applied, and the regeneration water enters from the first regeneration water path and is discharged from the second regeneration water path.
Under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxyl ions between each stage of cation exchange unit layer and anion exchange unit layer is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolysis voltage, the hydroxyl ions move towards the positive plate, salt negative ions in the anion exchange resin are replaced in the process of moving the hydroxyl ions, and the replaced salt negative ions penetrate through the anion exchange membrane to enter the first regeneration water path under the electric attraction of the positive plate. Meanwhile, hydrogen ions move towards the negative plate, positive salt ions in the cation exchange resin are replaced in the hydrogen ion moving process, and the replaced positive salt ions penetrate through the cation exchange membrane and enter the second regeneration water channel under the electric attraction of the negative plate.
In the second regeneration water path, the replaced salt positive ions and salt negative ions are combined, and finally, the salt positive ions and salt negative ions are discharged as concentrated water from the second regeneration water path.
The water purifier of the embodiment is provided with a water filtering and purifying system with a transverse functional unit, ten stages of ion exchange regeneration units are stacked between an anion exchange membrane and a cation exchange membrane, each stage of ion exchange regeneration unit is formed by stacking a cation exchange unit layer and an anion exchange unit layer, the cation exchange unit layers and the anion exchange unit layers are transversely arranged relative to the water flow direction under the desalting working condition, and water flows into the next layer from the upper layer. Can carry out the multi-stage filtration to the raw water through this drainage clean system, carry out the desalination to the raw water, the desalination in-process does not produce waste water, can further improve the product water quality of pure water, can also reverse electrolysis hydrogen ion and hydroxyl ion, and positive ion of salt and salt anion in cation exchange unit layer, the anion exchange unit layer after will desalinating for a long time replace, improve drainage clean system's utilization ratio, the life of extension water purifier.
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 (10)
1. The utility model provides a horizontal formula drainage clean system of functional unit which characterized in that: at least one stage of ion exchange regeneration unit is stacked between the anion exchange membrane and the cation exchange membrane, and each stage of ion exchange regeneration unit is formed by stacking a cation exchange unit layer and an anion exchange unit layer;
and the cation exchange unit layers and the anion exchange unit layers are transversely arranged relative to the water flow direction under the desalting working condition, and the water flow flows into the next layer from the upper layer.
2. The functional unit horizontal drainage purification system of claim 1, wherein: the cation exchange unit layer in each stage of ion exchange regeneration unit is positioned above the anion exchange unit layer.
3. The functional unit horizontal drainage purification system of claim 1, wherein: the anion exchange unit layer in each stage of ion exchange regeneration unit is positioned above the cation exchange unit layer.
4. The functional unit horizontal drainage purification system of claim 1, wherein: two to ten stages of ion exchange regeneration units are overlapped between the anion exchange membrane and the cation exchange membrane.
5. The functional unit horizontal drainage purification system of claim 1, wherein: and relative to the water flow direction under the desalting working condition, the cation exchange unit layer and the anion exchange unit layer are perpendicular to the water flow direction.
6. The functional unit horizontal drainage purification system according to any one of claims 1 to 5, wherein: the device is also provided with a regeneration water path, the regeneration water path is provided with a first regeneration water path and a second regeneration water path, the anion exchange membrane forms part of the structure of the first regeneration water path, the 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.
7. The functional unit horizontal drainage purification system of claim 6, wherein: the water electrolysis device is characterized by further comprising a positive plate and a negative plate, wherein the positive plate and the negative plate are used for electrolyzing water, the positive plate is arranged on one side, away from the anion exchange membrane, of the first regeneration water path, and the negative plate is assembled on one side, away from the cation exchange membrane, of the second regeneration water path.
8. The functional unit horizontal drainage purification system according to any one of claims 1 to 5, wherein: the cation exchange unit layer 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 layer is arranged into 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.
9. A functional unit horizontal drainage purification method for desalinating and purifying water by the functional unit horizontal drainage purification system according to any one of claims 1 to 8, characterized in that:
in the desalting process, a regeneration water path is closed, no electrolytic voltage is applied, raw water passes through each stage of ion exchange regeneration unit, positive salt ions to be desalted in the raw water are replaced by hydrogen ions in the cation exchange unit layer in each stage of ion exchange regeneration unit, the positive salt ions are adsorbed by the cation exchange unit layer, the hydrogen ions are replaced, and the replaced hydrogen ions enter the next anion exchange unit layer along with the raw water; in the anion exchange unit layer, the salt anions in the raw water are replaced by hydroxide ions in the anion exchange unit layer, the salt anions are absorbed by the anion exchange unit layer, 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, the desalination water path is closed, electrolysis voltage is applied, and the regeneration water enters from the first regeneration water path and is discharged from the second regeneration water path;
under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxyl ions between each stage of cation exchange unit layer and anion exchange unit layer is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolysis voltage, the hydroxyl ions move towards the positive plate, salt negative ions in the anion exchange resin are replaced in the process of moving the hydroxyl ions, and the replaced salt negative ions enter the first regeneration water path through the anion exchange membrane under the electric attraction of the positive plate;
meanwhile, hydrogen ions move towards the negative plate, positive salt ions in the cation exchange resin are replaced in the hydrogen ion moving process, and the replaced positive salt ions enter a second regeneration water path through the cation exchange membrane under the electric attraction of the negative plate;
in the second regeneration water path, the replaced salt positive ions and salt negative ions are combined, and finally, the salt positive ions and salt negative ions are discharged as concentrated water from the second regeneration water path.
10. A water purifier is characterized in that: the horizontal water filtering and purifying system with the functional unit as claimed in any one of claims 1 to 8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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