CN212151693U - One-way cation exchange type water filtering and purifying system and water purifier - Google Patents
One-way cation exchange type water filtering and purifying system and water purifier Download PDFInfo
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- CN212151693U CN212151693U CN202020325499.4U CN202020325499U CN212151693U CN 212151693 U CN212151693 U CN 212151693U CN 202020325499 U CN202020325499 U CN 202020325499U CN 212151693 U CN212151693 U CN 212151693U
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Abstract
The utility model provides an one-way cation exchange formula drainage clean system and water purifier, the water purifier carries out the water purification through drainage clean system, only be provided with first cation exchange membrane between the cation exchange unit of drainage clean system's ion exchange regeneration unit and the anion exchange unit, the desalination water route through ion exchange regeneration unit directly desalts the raw water, produce the pure water, desalination efficiency is high, still produce hydrogen ion and hydroxyl ion through regeneration water route electrolysis, the cation exchange unit after the hydrogen ion will be desalinated for a long time through first cation exchange membrane, salt positive ion in the anion exchange unit replaces, hydroxyl ion gets into anion exchange resin along with water and replaces salt negative ion, ion exchange regeneration unit has improved drainage clean system's utilization ratio, the life of extension water purifier.
Description
Technical Field
The utility model relates to a water purifier technical field especially relates to an one-way cation exchange formula drainage clean system and water purifier.
Background
Most of the existing ion exchange water purifiers adopt combined filter elements for separately treating anions and cations to purify water, anion exchange membrane and cation exchange membrane double-layer membranes are generally arranged between the combined filter elements, and the anions and the cations are respectively replaced through the anion exchange membrane and the cation exchange membrane double-layer membranes so as to achieve the desalting effect. The combined filter element for separately treating the anions and the cations generally treats one kind of ions firstly and then treats another kind of ions with different electrical properties, only single ion exchange is needed, the use cost of the double-layer ion exchange membrane is too high, the filter element needs to be replaced after the ion exchange filter element works for a certain time so as to maintain the normal water purification performance of the water purifier, and the double-layer ion exchange membrane increases the cost for replacing the filter element.
Therefore, it is necessary to provide a unidirectional cation exchange type water filtration and purification system and a water purifier to overcome the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an one-way cation exchange formula drainage clean system, directly desalt the raw water through cation exchange unit and anion exchange unit, produce the pure water, desalination efficiency is higher, still produce hydrogen ion and hydroxyl ion through the electrolysis, be provided with first cation exchange membrane between cation exchange unit and the anion exchange unit, the cation exchange unit after will desalting for a long time, salt positive ion in the anion exchange unit replaces, improve drainage clean system's utilization ratio, reduce drainage clean system's change frequency.
The above object of the present invention is achieved by the following technical measures.
The utility model provides a one-way cation exchange formula drainage clean system, be provided with first cation exchange membrane between the cation exchange unit of its ion exchange regeneration unit and anion exchange unit. Only the first cation exchange membrane is arranged between the cation exchange unit and the anion exchange unit, so that hydrogen ions obtained after electrolysis can be unidirectionally transferred from the anion exchange unit to the cation exchange unit.
Preferably, the ion exchange regeneration unit is provided with a desalination water path and a regeneration water path. Raw water is directly desalted through the desalting waterway to generate pure water, regenerated water is electrolyzed through the regeneration waterway to generate hydrogen ions and hydroxyl ions, the cation exchange unit and the anion exchange unit are subjected to ion supplementation, and the replacement frequency of the water filtering and purifying system is reduced.
Preferably, the desalination water path is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is sandwiched between the first cation exchange membrane and the second cation exchange membrane, and the anion exchange unit is sandwiched between the first cation exchange membrane and the anion exchange membrane.
Preferably, the first cation exchange membrane, the second cation exchange membrane, and the cation exchange unit constitute a first desalination water path during desalination, the first cation exchange membrane, the anion exchange membrane, and the anion exchange unit constitute 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.
Preferably, the regeneration water passage is provided with a first regeneration water passage and a second regeneration water passage, the anion exchange membrane constitutes a partial structure of the first regeneration water passage, the second cation exchange membrane constitutes a partial structure of the second regeneration water passage, and the regeneration water passes through the first regeneration water passage and the second regeneration water passage in sequence and is discharged as concentrated water.
Preferably, the ion exchange unit 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 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.
Preferably, in the desalination waterway, the raw water firstly passes through the first desalination waterway and then passes through the second desalination waterway and then is discharged; in the regeneration water path, the regeneration water is discharged after passing through the first regeneration water path and the second regeneration water path.
Preferably, the cation exchange unit and the anion exchange unit are arranged in parallel.
Preferably, the cation exchange unit, the anion exchange unit, the first cation exchange membrane, the second cation exchange membrane, and the anion exchange membrane are arranged in parallel.
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.
In the desalination process, the regeneration water path is closed, no electrolysis voltage is applied, and the raw water passes through the first desalination water path and the second desalination water path of the desalination water path and then is discharged as pure water. In the first desalination water path, 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 the second desalination water path along with the raw water; in the second desalination water path, the salt negative ions in the raw water are replaced by hydroxide ions in the anion exchange unit, the salt negative ions are absorbed by the anion exchange unit, 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 electrolytic voltage, water generated by hydrogen ions and hydroxide ions permeating through the first cation exchange membrane in the desalting process is decomposed into hydrogen ions and hydroxide ions again under the action of the electrolytic voltage, the hydrogen ions move towards the negative electrode, in the process of moving the hydrogen ions, the water enters the cation exchange membrane through the first cation exchange membrane to replace positive salt ions in the cation exchange resin, and under the electric attraction of the negative electrode plate, the replaced positive salt ions enter the second regeneration water path through the second cation exchange membrane; the hydroxyl ions enter the anion exchange resin along with the non-electrolyzed water to replace the salt negative ions in the anion exchange resin, the replaced salt negative ions move towards the positive plate, 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.
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 utility model discloses an one-way cation exchange formula drainage clean system is provided with the ion exchange regeneration unit that is provided with first cation exchange membrane between cation exchange unit and the anion exchange unit, and the ion exchange regeneration unit is provided with desalination water route and regeneration water route. The raw water is directly desalted through the desalting water path to generate pure water and improve the desalting efficiency, hydrogen ions and hydroxyl ions are generated through the regeneration water path electrolysis, a first page of cation exchange membrane is arranged between the cation exchange unit and the anion exchange unit, and salt positive ions in the cation exchange unit and the anion exchange unit 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 utility model is to provide an one-way cation exchange formula drainage purification method, can directly desalt the raw water through one-way cation exchange formula drainage purification system, produce the pure water, the desalination is efficient, still produce hydrogen ion and hydroxyl ion through the electrolysis, be provided with first cation exchange membrane between the cation exchange unit of drainage purification system and the anion exchange unit, the cation exchange unit after will desalting for a long time, salt positive ion in the anion exchange unit replaces, improve drainage purification system's utilization ratio, reduce drainage purification system's change frequency.
The above object of the present invention is achieved by the following technical measures.
The one-way cation exchange type water filtering and purifying method is provided, and raw water can be directly desalted and purified through a one-way cation exchange type water filtering and purifying system.
In the desalination process, the regeneration water path is closed, no electrolysis voltage is applied, and the raw water passes through the first desalination water path and the second desalination water path of the desalination water path and then is discharged as pure water.
Specifically, in the first desalination water channel, 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 the second desalination water channel along with the raw water; in the second desalination water path, the salt negative ions in the raw water are replaced by hydroxide ions in the anion exchange unit, the salt negative ions are absorbed by the anion exchange unit, 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.
Specifically, under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxide ions permeating through a first cation exchange membrane in the desalting process is decomposed into hydrogen ions and hydroxide ions again under the action of the electrolysis voltage, the hydrogen ions move towards a negative electrode, in the process of moving the hydrogen ions, the hydrogen ions enter the cation exchange membrane through the first cation exchange membrane to replace positive salt ions in the cation exchange membrane, and under the electric attraction of a negative plate, the replaced positive salt ions enter a second regeneration water path through a second cation exchange membrane; the hydroxyl ions enter the anion exchange resin along with the non-electrolyzed water to replace the salt negative ions in the anion exchange resin, the replaced salt negative ions move towards the positive plate, 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.
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 utility model discloses an one-way cation exchange formula drainage purification method directly carries out the desalination through one-way cation exchange formula drainage purification system to the raw water and purifies, and the desalination in-process does not produce waste water, and the desalination is efficient, still produces hydrogen ion and hydroxyl ion through the electrolysis, carries out the replacement of salt positive ion and salt anion to the desalination water route of long-term work, improves drainage purification system's utilization ratio, reduces drainage purification system's change frequency.
Another object of the utility model is to provide a water purifier, have the drainage clean system that only is provided with first cation exchange membrane between cation exchange unit and the anion exchange unit, directly desalt the raw water through drainage clean system, produce the pure water, the desalination is efficient, still produce hydrogen ion and hydroxyl ion through the electrolysis, be provided with first cation exchange membrane between cation exchange unit and the anion exchange unit, the cation exchange unit after will desalting for a long time, salt positive ion in the anion exchange unit replaces, improve drainage clean system's utilization ratio, reduce drainage clean system's change frequency.
The above object of the present invention is achieved by the following technical measures.
The utility model provides a water purifier is provided with one-way cation exchange formula drainage clean system, and its drainage clean system is provided with ion exchange regeneration unit, is provided with first cation exchange membrane between its cation exchange regeneration unit's cation exchange unit and anion exchange unit. Only the first cation exchange membrane is arranged between the cation exchange unit and the anion exchange unit, so that hydrogen ions obtained after electrolysis can be unidirectionally transferred from the anion exchange unit to the cation exchange unit
Preferably, the ion exchange regeneration unit is provided with a desalination water path and a regeneration water path. Raw water is directly desalted through the desalting waterway to generate pure water, regenerated water is electrolyzed through the regeneration waterway to generate hydrogen ions and hydroxyl ions, the cation exchange unit and the anion exchange unit are subjected to ion supplementation, and the replacement frequency of the water filtering and purifying system is reduced.
Preferably, the desalination water path is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is sandwiched between the first cation exchange membrane and the second cation exchange membrane, and the anion exchange unit is sandwiched between the first cation exchange membrane and the anion exchange membrane.
Preferably, the first cation exchange membrane, the second cation exchange membrane, and the cation exchange unit constitute a first desalination water path during desalination, the first cation exchange membrane, the anion exchange membrane, and the anion exchange unit constitute 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.
Preferably, the regeneration water passage is provided with a first regeneration water passage and a second regeneration water passage, the anion exchange membrane constitutes a partial structure of the first regeneration water passage, the second cation exchange membrane constitutes a partial structure of the second regeneration water passage, and the regeneration water passes through the first regeneration water passage and the second regeneration water passage in sequence and is discharged as concentrated water.
Preferably, the ion exchange unit 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 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.
Preferably, in the desalination waterway, the raw water firstly passes through the first desalination waterway and then passes through the second desalination waterway and then is discharged; in the regeneration water path, the regeneration water is discharged after passing through the first regeneration water path and the second regeneration water path.
Preferably, the cation exchange unit and the anion exchange unit are arranged in parallel.
Preferably, the cation exchange unit, the anion exchange unit, the first cation exchange membrane, the second cation exchange membrane, and the anion exchange membrane are arranged in parallel.
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.
In the desalination process, the regeneration water path is closed, no electrolysis voltage is applied, and the raw water passes through the first desalination water path and the second desalination water path of the desalination water path and then is discharged as pure water. In the first desalination water path, 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 the second desalination water path along with the raw water; in the second desalination water path, the salt negative ions in the raw water are replaced by hydroxide ions in the anion exchange unit, the salt negative ions are absorbed by the anion exchange unit, 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 electrolytic voltage, water generated by hydrogen ions and hydroxide ions permeating through the first cation exchange membrane in the desalting process is decomposed into hydrogen ions and hydroxide ions again under the action of the electrolytic voltage, the hydrogen ions move towards the negative electrode, in the process of moving the hydrogen ions, the water enters the cation exchange membrane through the first cation exchange membrane to replace positive salt ions in the cation exchange resin, and under the electric attraction of the negative electrode plate, the replaced positive salt ions enter the second regeneration water path through the second cation exchange membrane; the hydroxyl ions enter the anion exchange resin along with the non-electrolyzed water to replace the salt negative ions in the anion exchange resin, the replaced salt negative ions move towards the positive plate, 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.
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 utility model discloses a water purifier, the drainage clean system who only is provided with first cation exchange membrane between cation exchange unit and the anion exchange unit has, the desalination water route of the ion exchange regeneration unit through drainage clean system directly desalts the raw water, produce the pure water, the desalination is efficient, still produce hydrogen ion and hydroxyl ion through regeneration water route electrolysis, be provided with first cation exchange membrane between cation exchange unit and the anion exchange unit, the cation exchange unit after will desalting for a long time, salt positive ion in the anion exchange unit replaces, improve drainage clean system's utilization ratio, the life of extension water purifier.
Drawings
The present invention will be further described with reference to the accompanying drawings, but the contents in the drawings do not constitute any limitation to the present invention.
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.
In fig. 1 to 2, the method includes:
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, an anion exchange membrane 230,
A first regeneration water path 300 and a second regeneration water path 400.
Detailed Description
The present invention will be further illustrated with reference to the following examples.
Example 1.
A unidirectional cation exchange type water filtering and purifying system is shown in figures 1 and 2, wherein a first cation exchange membrane 120 is arranged between a cation exchange unit 110 and an anion exchange unit 210 of an ion exchange regeneration unit. Only the first cation exchange membrane 120 is arranged between the cation exchange unit 110 and the anion exchange unit 210, so that hydrogen ions obtained after electrolysis can be unidirectionally transferred from the anion exchange unit 210 to the cation exchange unit 110.
The ion exchange regeneration unit of the present embodiment is provided with a desalination water path and a regeneration water path. Raw water is directly desalted through the desalting waterway to generate pure water, regenerated water is electrolyzed through the regeneration waterway to generate hydrogen ions and hydroxyl ions, the cation exchange unit 110 and the anion exchange unit 210 are subjected to ion replacement, and the replacement frequency of the water filtering and purifying system is reduced.
The desalination water channel of the present embodiment is provided with a cation exchange unit 110 and an anion exchange unit 210, the cation exchange unit 110 is sandwiched between the first cation exchange membrane 120 and the second cation exchange membrane 130, and the anion exchange unit 210 is sandwiched between the first cation exchange membrane 120 and the anion exchange membrane 230.
The first cation exchange membrane 120, the second cation exchange membrane 130, and the cation exchange unit 110 of the present embodiment constitute a first desalination water channel 100 during desalination, the first cation exchange membrane 120, the anion exchange membrane 230, and the anion exchange unit 210 constitute a second desalination water channel 200 during desalination, and raw water passes through the first desalination water channel 100 and the second desalination water channel 200 and is discharged as pure water.
The regeneration water passage of the present embodiment is provided with a first regeneration water passage 300 and a second regeneration water passage 400, the anion exchange membrane 230 constitutes a part of the structure of the first regeneration water passage 300, the second cation exchange membrane 130 constitutes 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 ion exchange unit of this example was provided as a cation exchange resin.
The cation exchange resin of this embodiment is configured as a strongly acidic cation exchange resin, and it should be noted that the cation exchange resin may also be configured as a weakly acidic cation exchange resin, or a mixture composition 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 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 water path of the present embodiment, the raw water passes through the first desalination water path 100 and then passes through the second desalination water path 200 before being discharged; in the regeneration water path, the regeneration water passes through the first regeneration water path 300 and then passes through the second regeneration water path 400 before being discharged.
The cation exchange unit 110 and the anion exchange unit 210 of the present embodiment are arranged in parallel.
The cation exchange unit 110, the anion exchange unit 210, the first cation exchange membrane 120, the second cation exchange membrane 130, and the anion exchange membrane 230 of the present embodiment are arranged in parallel.
In this embodiment, a positive electrode plate and a negative electrode plate for electrolyzing water are further provided, the positive electrode plate being disposed on a side of the first regeneration water path 300 away from the anion exchange membrane, and the negative electrode plate being mounted on a side of the second regeneration water path 400 away from the cation exchange membrane.
In the desalination process, the regeneration water path is closed, and 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 desalination water path and is discharged as pure water. In the first desalination water path 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 second desalination water path 200 along with the raw water; in the second desalination water path 200, the salt anions in the raw water are replaced by the hydroxide ions in the anion exchange unit 210, the salt anions are absorbed 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 desalination water path is closed, an electrolysis voltage is applied, and the regeneration water is introduced from the first regeneration water path 300 and discharged from the second regeneration water path 400. Under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxyl ions permeating through the first cation exchange membrane 120 in the desalination process is decomposed into hydrogen ions and hydroxyl ions again under the action of the electrolysis voltage, the hydrogen ions move towards the negative electrode, in the process of moving the hydrogen ions, the water enters the cation exchange membrane 120 through the first cation exchange membrane to replace positive salt ions in the cation exchange membrane, and under the electric attraction of the negative electrode plate, the replaced positive salt ions enter the second regeneration water path 400 through the second cation exchange membrane 130; the hydroxyl ions enter the anion exchange resin with the non-electrolyzed water, and displace the salt negative ions in the anion exchange resin, the displaced salt negative ions move toward the positive electrode plate, and the displaced salt negative ions are attracted by the positive electrode plate electrically and enter the first regenerated water path 300 through the anion exchange membrane 230.
In the second regeneration water path 400, the replaced salt positive ions and salt negative ions are combined, and finally discharged as concentrated water from the second regeneration water path 400.
The unidirectional cation exchange type water filtration and purification system of the embodiment is provided with an ion exchange regeneration unit, wherein a first cation exchange membrane 120 is arranged between a cation exchange unit 110 and an anion exchange unit 210, and the ion exchange regeneration unit is provided with a desalination water path and a regeneration water path. The raw water is directly desalted through the desalting water channel to generate pure water and improve the desalting efficiency, hydrogen ions and hydroxyl ions are generated through the regeneration water channel electrolysis, a cation exchange membrane is arranged between the cation exchange unit 110 and the anion exchange unit 210, and salt positive ions and salt negative ions in the cation exchange unit 110 and the anion exchange unit 210 after long-term desalting are replaced, so that the utilization rate of a water filtration and purification system is improved, and the replacement frequency of the water filtration and purification system is reduced.
Example 2.
A unidirectional cation exchange type water filtration and purification method comprises the step of performing water filtration and purification through a unidirectional cation exchange type water filtration and purification system, wherein only a first cation exchange membrane is arranged between a cation exchange unit and an anion exchange unit of the water filtration and purification system.
In the desalination process of the present embodiment, the regeneration water path is closed, no electrolysis voltage is applied, and the raw water passes through the first desalination water path and the second desalination water path of the desalination water path and is then discharged as pure water.
Specifically, in the first desalination water channel, 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 the second desalination water channel along with the raw water; in the second desalination water path, the salt negative ions in the raw water are replaced by hydroxide ions in the anion exchange unit, the salt negative ions are absorbed by the anion exchange unit, 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.
Specifically, under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxide ions permeating through a first cation exchange membrane in the desalting process is decomposed into hydrogen ions and hydroxide ions again under the action of the electrolysis voltage, the hydrogen ions move towards a negative electrode, in the process of moving the hydrogen ions, the hydrogen ions enter the cation exchange membrane through the first cation exchange membrane to replace positive salt ions in the cation exchange membrane, and under the electric attraction of a negative plate, the replaced positive salt ions enter a second regeneration water path through a second cation exchange membrane; the hydroxyl ions enter the anion exchange resin along with the non-electrolyzed water to replace the salt negative ions in the anion exchange resin, the replaced salt negative ions move towards the positive plate, 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.
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.
In the one-way cation exchange type water filtration and purification method of the embodiment, water filtration and purification are performed by a one-way cation exchange type water filtration and purification system, wherein only a first cation exchange membrane is arranged between a cation exchange unit and an anion exchange unit of the water filtration and purification system. The raw water is directly desalted and purified through the desalting waterway of the water filtering and purifying system to generate pure water, the desalting efficiency is high, hydrogen ions and hydroxyl ions are generated through electrolysis, unidirectional replacement is carried out between the cation exchange unit and the anion exchange unit through the first cation exchange membrane, salt positive ions in the cation exchange unit and the anion exchange unit after long-term desalting are replaced, and the replacement frequency of the water filtering and purifying system is reduced.
Example 3.
A water purifier is provided with a one-way cation exchange type water filtering and purifying system, the water filtering and purifying system is provided with an ion exchange and regeneration unit, and a first cation exchange membrane is arranged between a cation exchange unit and an anion exchange unit of the ion exchange and regeneration unit. Only the first cation exchange membrane is arranged between the cation exchange unit and the anion exchange unit, so that hydrogen ions obtained after electrolysis can be unidirectionally transferred from the anion exchange unit to the cation exchange unit.
The ion exchange regeneration unit of the present embodiment is provided with a desalination water path and a regeneration water path. Raw water is directly desalted through the desalting waterway to generate pure water, regenerated water is electrolyzed through the regeneration waterway to generate hydrogen ions and hydroxyl ions, the cation exchange unit and the anion exchange unit are subjected to ion supplementation, and the replacement frequency of the water filtering and purifying system is reduced.
The desalination water path of this embodiment is provided with cation exchange unit, anion exchange unit, and cation exchange unit presss from both sides and locates between first cation exchange membrane and the second cation exchange membrane, and anion exchange unit presss from both sides and locates between first cation exchange membrane and the anion exchange membrane.
The first cation exchange membrane, the second cation exchange membrane and the cation exchange unit of the present embodiment constitute a first desalination water path during desalination, the first cation exchange membrane, the anion exchange membrane and the anion exchange unit constitute 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 of this embodiment is provided with first regeneration water path and second regeneration water path, and anion exchange membrane constitutes the partial structure of first regeneration water path, and the partial structure of second regeneration water path is constituted to the second cation exchange membrane, and the recycled water loops through first regeneration water path, second regeneration water path after and discharges as dense water.
The ion exchange unit of this example was provided as a cation exchange resin.
The cation exchange resin of this embodiment is configured as a strongly acidic cation exchange resin, and it should be noted that the cation exchange resin may also be configured as a weakly acidic cation exchange resin, or a mixture composition 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 of this example was 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 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 waterway of the embodiment, raw water passes through the first desalination waterway and then passes through the second desalination waterway before being discharged; in the regeneration water path, the regeneration water is discharged after passing through the first regeneration water path and the second regeneration water path.
The cation exchange unit and the anion exchange unit of this embodiment are arranged in parallel.
The cation exchange unit, the anion exchange unit, the first cation exchange membrane, the second cation exchange membrane and the anion exchange membrane of the present embodiment are arranged in parallel.
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.
In the desalination process, the regeneration water path is closed, no electrolysis voltage is applied, and the raw water passes through the first desalination water path and the second desalination water path of the desalination water path and then is discharged as pure water. In the first desalination water path, 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 the second desalination water path along with the raw water; in the second desalination water path, the salt negative ions in the raw water are replaced by hydroxide ions in the anion exchange unit, the salt negative ions are absorbed by the anion exchange unit, 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 electrolytic voltage, water generated by hydrogen ions and hydroxide ions permeating through the first cation exchange membrane in the desalting process is decomposed into hydrogen ions and hydroxide ions again under the action of the electrolytic voltage, the hydrogen ions move towards the negative electrode, in the process of moving the hydrogen ions, the water enters the cation exchange membrane through the first cation exchange membrane to replace positive salt ions in the cation exchange resin, and under the electric attraction of the negative electrode plate, the replaced positive salt ions enter the second regeneration water path through the second cation exchange membrane; the hydroxyl ions enter the anion exchange resin along with the non-electrolyzed water to replace the salt negative ions in the anion exchange resin, the replaced salt negative ions move towards the positive plate, 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.
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 this embodiment, the drainage clean system who only is provided with first cation exchange membrane between cation exchange unit and the anion exchange unit has, the desalination water route through the ion exchange regeneration unit of drainage clean system directly desalts the raw water, produce the pure water, desalination efficiency is high, still produce hydrogen ion and hydroxyl ion through regeneration water route electrolysis, be provided with first cation exchange membrane between cation exchange unit and the anion exchange unit, the cation exchange unit after will desalinating for a long time, the salt positive ion in the anion exchange unit replaces, improve drainage clean system's utilization ratio, the life of extension water purifier.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The one-way cation exchange type water filtering and purifying system is characterized in that: a first cation exchange membrane is arranged between a cation exchange unit and an anion exchange unit of the ion exchange regeneration unit;
the ion exchange regeneration unit is provided with a desalination water path and a regeneration water path;
the desalting water path comprises 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, and the anion exchange unit is clamped between the first cation exchange membrane and the anion exchange membrane;
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 cation exchange membrane, the anion exchange membrane and the anion exchange unit form a second desalination water path during desalination, and raw water passes through the first desalination water path and the second desalination water path and then is discharged as pure water;
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 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.
2. The unidirectional cation exchange, water filtration purification system of claim 1, wherein: the cation exchange unit is set as cation exchange resin, and the anion exchange unit is set as anion exchange resin.
3. The unidirectional cation exchange, water filtration purification system of claim 2, wherein: the cation exchange resin is one of strong acid cation exchange resin or weak acid cation exchange resin, or the combination of the two.
4. The unidirectional cation exchange, water filtration purification system of claim 2, wherein: the anion exchange resin is one of strong base anion exchange resin or weak base anion exchange resin, or the combination of the two.
5. The unidirectional cation exchange, water filtration purification system of any one of claims 1 to 4, wherein: in the desalination waterway, the raw water firstly passes through the first desalination waterway and then passes through the second desalination waterway and then is discharged;
in the regeneration water path, the regeneration water is discharged after passing through the first regeneration water path and the second regeneration water path.
6. The unidirectional cation exchange, water filtration purification system of claim 5, wherein: the cation exchange unit and the anion exchange unit are arranged in parallel.
7. The unidirectional cation exchange, water filtration purification system of claim 6, wherein: the cation exchange unit, the anion exchange unit, the first cation exchange membrane, the second cation exchange membrane and the anion exchange membrane are arranged in parallel.
8. The unidirectional cation exchange, water filtration purification system of claim 7, 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.
9. A water purifier is characterized in that: the unidirectional cation exchange water purification system of any one of claims 1 to 8.
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Effective date of registration: 20211027 Address after: 528308 No.2, North Xinxi 4th Road, Xiashi village, Lunjiao street, Shunde District, Foshan City, Guangdong Province Patentee after: Guangdong Chestnut Technology Co.,Ltd. Address before: 528300 Nepheline Village Committee, Lunjiao Sub-district Office, Shunde District, Foshan City, Guangdong Province Patentee before: FOSHAN VIOMI ELECTRICAL TECHNOLOGY Co.,Ltd. Patentee before: Chen Xiaoping |
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