CN211896160U - Water purification system and water purifier - Google Patents
Water purification system and water purifier Download PDFInfo
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- CN211896160U CN211896160U CN202020325524.9U CN202020325524U CN211896160U CN 211896160 U CN211896160 U CN 211896160U CN 202020325524 U CN202020325524 U CN 202020325524U CN 211896160 U CN211896160 U CN 211896160U
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Abstract
A water purifier, the water purification system has membrane filtration unit and electric regeneration filtration unit, the concentrated water outlet pipe of the membrane filtration unit communicates with intake pipe of the electric regeneration filtration unit; when the machine is stopped, all or part of concentrated water produced by the membrane filtration unit under the water purification working condition is input into the electric regeneration filtration unit, the pure water is obtained after being treated by the electric regeneration filtration unit, and the pure water flows back to a water inlet pipeline of the membrane filtration unit from the circulating flow passage and is used as inlet water of the membrane filtration unit; when the water quality is judged to meet the requirement, the pure water is discharged through the pure water outlet pipeline under the next water purification working condition, if not, the pure water is discharged into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality meets the requirement, the problem that the content of pure water discharged by the water purifier after long-term standing is high is solved, and meanwhile, salt positive ions and salt negative ions after long-term desalination are replaced, so that the service life of the electric regeneration filter element can be prolonged.
Description
Technical Field
The utility model relates to a water purifier technical field, in particular to water purification system and water purifier.
Background
Water purifiers, also called water purifiers and water purifiers, are water treatment apparatuses that perform advanced filtration and purification treatment of water quality according to the use requirements of water. At present, the water purifier has become one of the indispensable electrical products in most households.
Most of the water purifiers among the prior art are when the water purification operating mode, and generally the raw water is earlier through the preliminary filtration processing of the cotton filter core of PP, silt, suspended solid, colloid, organic matter and impurity in the filtering aquatic, and the hydrone that will filter again flows in the RO filter core via the water pipe and carries out secondary filter and handle, obtains pure water and dense water, and the pure water is discharged through pure water pipeline, and dense water is discharged via dense water pipeline. When the water purifier is shut down, the salt content of the residual concentrated water retained in the RO filter element is high, and the concentrated water is easy to permeate into a pure water pipeline, so that the phenomenon that the salt content of the head cup water is too high is caused when the water purifier is used in the next pure water working condition, and the use of a user is influenced.
Therefore, it is necessary to provide a water purification system and a water purifier to solve the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to avoid the disadvantages of the prior art and to provide a water purification system which is necessary to solve the disadvantages of the prior art. The water purification system can solve the problem that the salt content of pure water discharged after the water purifier is kept still for a long time is high, and meanwhile, salt positive ions and salt negative ions after long-term desalination are replaced, so that the service life of the electric regeneration filter element can be prolonged.
The above object of the present invention is achieved by the following technical means.
A water purification system is provided with a membrane filtration unit and an electric regeneration filtration unit, wherein a concentrated water outlet pipe of the membrane filtration unit is communicated with a water inlet pipe of the electric regeneration filtration unit.
When the machine is stopped, all or part of concentrated water produced by the membrane filtration unit under the water purification working condition is input into the electric regeneration filtration unit, the pure water is obtained after being treated by the electric regeneration filtration unit, and the pure water flows back to a water inlet pipeline of the membrane filtration unit from the circulating flow passage and is used as inlet water of the membrane filtration unit;
and when the water quality meets the requirement, discharging the water through the pure water outlet pipeline under the next water purification working condition, and if not, discharging the water into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality meets the requirement.
Preferably, the electric regeneration filtering unit is provided with a desalination water path;
the desalination water path is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is clamped between the first cation exchange membrane and the second cation exchange membrane, and one end, far away from the second cation exchange membrane, of the anion exchange unit is provided with an 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, and the anion exchange membrane and the anion exchange unit constitute a second desalination water path during desalination.
In the desalting working condition, the regeneration water path is closed, no electrolytic voltage is applied, and all or part of concentrated water input into the electric regeneration filtering unit is discharged as pure water after passing through the first desalting water path and the second desalting water path;
in the first desalination water path, positive salt ions to be desalinated in the concentrated 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 concentrated water; in the second desalting water path, the salt negative ions in the concentrated 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 and the hydrogen ions react to generate water which is discharged in the form of pure water.
Preferably, the electric regeneration filtering unit is also provided with a regeneration water path, a positive plate and a negative plate for electrolyzing 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, and the first cation exchange membrane forms part of the structure of the second regeneration water path; the positive plate sets up in the one side of keeping away from anion exchange membrane in first regeneration water route, and the negative plate sets up in the one side of keeping away from cation exchange membrane in second regeneration water route.
In the regeneration working condition, the desalination water path is closed, the electrolysis voltage is applied, and the regenerated water passes through the first regeneration water path and the second regeneration water path in sequence and then is discharged as concentrated water;
under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxide ions permeating through the second cation exchange membrane in the desalting process is decomposed into hydrogen ions and hydroxide ions again, the hydroxide ions enter the anion exchange unit along with the water not electrolyzed to replace salt negative ions, the replaced salt negative ions move towards the positive plate, and under the condition of electric attraction of the positive plate, the replaced salt negative ions penetrate through the anion exchange membrane to enter the first regeneration water path;
meanwhile, hydrogen ions move towards the negative plate, and in the process of moving the hydrogen ions, the hydrogen ions enter the cation exchange unit through the second cation exchange membrane to be replaced by salt positive ions, and under the condition of electric attraction of the negative plate, the replaced salt positive ions enter the second regeneration water path through the first cation exchange membrane;
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 purification system of the utility model is also provided with a water quality detector which is arranged at the water outlet pipe of the membrane filtration unit;
when the machine is shut down, judging whether the TDS value of the water quality of the water produced by the membrane filtration unit is less than or equal to C, if so, discharging the water by a pure water outlet pipeline under the next pure water working condition; if not, the concentrated water is discharged into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality TDS meets the conditions.
Preferably, the water purification system of the present invention is further provided with a water quality detector, and the water quality detector is disposed at the pure water outlet pipeline of the electrical regeneration filtration unit;
when the device is shut down, judging whether the TDS value of the pure water produced by the electric regeneration filtering unit is less than or equal to D, if so, discharging the pure water from a pure water outlet pipeline of the membrane filtering unit under the next water purification working condition; if not, the concentrated water is discharged into the electric regeneration filtering unit through a concentrated water outlet pipeline of the membrane filtering unit to continue filtering treatment until the water quality TDS meets the condition.
The utility model discloses a water purification system still is provided with the control valve, and the control valve sets up in electric regeneration filter unit's water inlet department.
Preferably, the cation exchange unit is provided as a cation exchange resin, which is one of a strong acid cation exchange resin, a weak acid cation exchange resin, or a combination of both.
Preferably, the anion exchange unit is configured as an anion exchange resin, the anion exchange resin being one of a strongly basic anion exchange resin, a weakly basic anion exchange resin, or a combination of both.
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.
The utility model discloses a water purification system still is provided with leading filter unit, and leading filter unit sets up in water intake pipe department.
The water purification system is provided with a membrane filtration unit and an electric regeneration filtration unit, wherein a concentrated water outlet pipe of the membrane filtration unit is communicated with a water inlet pipe of the electric regeneration filtration unit; when the machine is stopped, all or part of concentrated water produced by the membrane filtration unit under the water purification working condition is input into the electric regeneration filtration unit, the pure water is obtained after being treated by the electric regeneration filtration unit, and the pure water flows back to a water inlet pipeline of the membrane filtration unit from the circulating flow passage and is used as inlet water of the membrane filtration unit; when the water quality is judged to meet the requirement, the pure water is discharged through the pure water outlet pipeline under the next water purification working condition, if not, the pure water is discharged into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality meets the requirement, the problem that the content of pure water discharged by the water purifier after long-term standing is high is solved, and meanwhile, salt positive ions and salt negative ions after long-term desalination are replaced, so that the service life of the electric regeneration filter element can be prolonged.
Another object of the present invention is to avoid the disadvantages of the prior art and to provide a water purifier which is necessary to solve the problems of the prior art. The water purifier can solve the problem that the salt content of pure water discharged after the water purifier is kept still for a long time is high, and meanwhile, salt positive ions and salt negative ions after long-term desalination are replaced, so that the service life of the electric regeneration filter element can be prolonged.
The utility model provides a water purifier, this water purification system of water purifier is provided with membrane filtration unit and electric regeneration filter unit, and membrane filtration unit's dense water outlet pipe and electric regeneration filter unit's inlet tube intercommunication.
When the machine is stopped, all or part of concentrated water produced by the membrane filtration unit under the water purification working condition is input into the electric regeneration filtration unit, the pure water is obtained after being treated by the electric regeneration filtration unit, and the pure water flows back to a water inlet pipeline of the membrane filtration unit from the circulating flow passage and is used as inlet water of the membrane filtration unit;
and when the water quality meets the requirement, discharging the water through the pure water outlet pipeline under the next water purification working condition, and if not, discharging the water into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality meets the requirement.
Preferably, the electric regeneration filtering unit is provided with a desalination water path;
the desalination water path is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is clamped between the first cation exchange membrane and the second cation exchange membrane, and one end, far away from the second cation exchange membrane, of the anion exchange unit is provided with an 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, and the anion exchange membrane and the anion exchange unit constitute a second desalination water path during desalination.
In the desalting working condition, the regeneration water path is closed, no electrolytic voltage is applied, and all or part of concentrated water input into the electric regeneration filtering unit is discharged as pure water after passing through the first desalting water path and the second desalting water path;
in the first desalination water path, positive salt ions to be desalinated in the concentrated 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 concentrated water; in the second desalting water path, the salt negative ions in the concentrated 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 and the hydrogen ions react to generate water which is discharged in the form of pure water.
Preferably, the electric regeneration filtering unit is also provided with a regeneration water path, a positive plate and a negative plate for electrolyzing 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, and the first cation exchange membrane forms part of the structure of the second regeneration water path; the positive plate sets up in the one side of keeping away from anion exchange membrane in first regeneration water route, and the negative plate sets up in the one side of keeping away from cation exchange membrane in second regeneration water route.
In the regeneration working condition, the desalination water path is closed, the electrolysis voltage is applied, and the regenerated water passes through the first regeneration water path and the second regeneration water path in sequence and then is discharged as concentrated water;
under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxide ions permeating through the second cation exchange membrane in the desalting process is decomposed into hydrogen ions and hydroxide ions again, the hydroxide ions enter the anion exchange unit along with the water not electrolyzed to replace salt negative ions, the replaced salt negative ions move towards the positive plate, and under the condition of electric attraction of the positive plate, the replaced salt negative ions penetrate through the anion exchange membrane to enter the first regeneration water path;
meanwhile, hydrogen ions move towards the negative plate, and in the process of moving the hydrogen ions, the hydrogen ions enter the cation exchange unit through the second cation exchange membrane to be replaced by salt positive ions, and under the condition of electric attraction of the negative plate, the replaced salt positive ions enter the second regeneration water path through the first cation exchange membrane;
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 purification system of the utility model is also provided with a water quality detector which is arranged at the water outlet pipe of the membrane filtration unit;
when the machine is shut down, judging whether the TDS value of the water quality of the water produced by the membrane filtration unit is less than or equal to C, if so, discharging the water by a pure water outlet pipeline under the next pure water working condition; if not, the concentrated water is discharged into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality TDS meets the conditions.
Preferably, the water purification system of the present invention is further provided with a water quality detector, and the water quality detector is disposed at the pure water outlet pipeline of the electrical regeneration filtration unit;
when the device is shut down, judging whether the TDS value of the pure water produced by the electric regeneration filtering unit is less than or equal to D, if so, discharging the pure water from a pure water outlet pipeline of the membrane filtering unit under the next water purification working condition; if not, the concentrated water is discharged into the electric regeneration filtering unit through a concentrated water outlet pipeline of the membrane filtering unit to continue filtering treatment until the water quality TDS meets the condition.
The utility model discloses a water purifier, water purification system still are provided with the control valve, and the control valve sets up in electric regeneration filter unit's water inlet department.
Preferably, the cation exchange unit is provided as a cation exchange resin, which is one of a strong acid cation exchange resin, a weak acid cation exchange resin, or a combination of both.
Preferably, the anion exchange unit is configured as an anion exchange resin, the anion exchange resin being one of a strongly basic anion exchange resin, a weakly basic anion exchange resin, or a combination of both.
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.
The utility model discloses a water purifier, water purification system still are provided with leading filter unit, and leading filter unit sets up in water intake pipe department.
The water purifier is characterized in that a water purification system is provided with a membrane filtration unit and an electric regeneration filtration unit, and a concentrated water outlet pipe of the membrane filtration unit is communicated with a water inlet pipe of the electric regeneration filtration unit; when the machine is stopped, all or part of concentrated water produced by the membrane filtration unit under the water purification working condition is input into the electric regeneration filtration unit, the pure water is obtained after being treated by the electric regeneration filtration unit, and the pure water flows back to a water inlet pipeline of the membrane filtration unit from the circulating flow passage and is used as inlet water of the membrane filtration unit; when the water quality is judged to meet the requirement, the pure water is discharged through the pure water outlet pipeline under the next water purification working condition, if not, the pure water is discharged into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality meets the requirement, the problem that the content of pure water discharged by the water purifier after long-term standing is high is solved, and meanwhile, salt positive ions and salt negative ions after long-term desalination are replaced, so that the service life of the electric regeneration filter element can be prolonged.
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 view of the working principle of a water purification system of the present invention.
Fig. 2 is a schematic diagram of a desalination water path of the water purification system of the present invention.
Fig. 3 is a schematic view of a regeneration water path of the water purification system of the present invention.
In fig. 1 to 3, the following are included:
a pre-filter unit 100, a membrane filter unit 200, an electrically regenerative filter unit 300,
A first desalination water channel 310,
A cation exchange unit 311, a first cation exchange membrane 312, a second cation exchange membrane 313,
A second desalination water channel 320,
An anion exchange unit 321, an anion exchange membrane 322,
A first regeneration water path 330, a second regeneration water path 340,
The valve 400 is controlled.
Detailed Description
The invention will be further described with reference to the following examples.
Example 1.
A water purification system is provided with a membrane filtration unit 200 and an electric regeneration filtration unit 300 as shown in figure 1, wherein a concentrated water outlet pipe of the membrane filtration unit 200 is communicated with a water inlet pipe of the electric regeneration filtration unit 300.
When the device is shut down, all or part of concentrated water produced by the membrane filtration unit 200 under the water purification working condition is input into the electric regeneration filtration unit 300, and is treated by the electric regeneration filtration unit 300 to obtain pure water, and the pure water flows back to the water inlet pipeline of the membrane filtration unit 200 from the circulating flow channel to be used as the inlet water of the membrane filtration unit 200;
when the water quality meets the requirement, the water is discharged through the pure water outlet pipeline under the next water purification working condition, and if not, the water is discharged into the electric regeneration filtering unit 300 through the concentrated water outlet pipeline to continue filtering treatment until the water quality meets the requirement.
Specifically, the determination method in this embodiment may be various, and may be to determine whether the water quality of the produced water of the membrane filtration unit 200 meets the requirement, determine whether the pure water produced by the electrical regeneration filtration unit 300 meets the water quality requirement, or determine other positions. It should be noted that, when performing specific setting, a person skilled in the art may select and determine the setting according to actual situations, and the setting is not limited specifically here.
In the following, for example, the water purifier system is further provided with a water quality detector, and the water quality detector is arranged at the water outlet pipe of the membrane filtration unit 200.
When the water purifier is stopped, whether the TDS value of the water produced by the membrane filtration unit 200 is less than or equal to C is judged by the water quality detector, and if so, the water is discharged from the pure water outlet pipeline under the next pure water working condition; if not, discharging the water quality which does not meet the requirements into the electric regeneration filtering unit 300 through a concentrated water outlet pipeline to continue filtering treatment until the water quality TDS meets the conditions. When shutting down, through carrying out the circulation to the water that does not satisfy the quality of water requirement and handling, can solve the first cup of pure water salt content too high problem of discharge when next water purification operating mode.
Specifically, in this embodiment, the value of C is 0 to 9. The lower the TDS value, the better the water quality effect, and the higher the TDS value, the more impurities contained in the water.
In the water purification system of the present embodiment, the electric regenerative filter unit 300 is provided with a desalination water path. As shown in fig. 2, the desalination water channel is provided with a cation exchange unit 311 and an anion exchange unit 321, the cation exchange unit 311 is interposed between a first cation exchange membrane 312 and a second cation exchange membrane 313, and an anion exchange membrane 322 is provided at one end of the anion exchange unit 321 away from the second cation exchange membrane 313.
The first cation exchange membrane 312, the second cation exchange membrane 313, and the cation exchange unit 311 in the present embodiment constitute a first desalination water channel 310 during desalination, and the anion exchange membrane 322 and the anion exchange unit 321 constitute a second desalination water channel 320 during desalination.
In the desalination working condition, the regeneration water path is closed, no electrolysis voltage is applied, and all or part of the concentrated water input into the electric regeneration filtering unit 300 passes through the first desalination water path 310 and the second desalination water path 320 and then is discharged as pure water;
in the first desalination water path 310, positive salt ions to be desalinated in the concentrated water are replaced by hydrogen ions in the cation exchange unit 311, the positive salt ions are adsorbed by the cation exchange unit 311, the hydrogen ions are replaced, and the replaced hydrogen ions enter the second desalination water path 320 along with the concentrated water; in the second desalination water path 320, the negative salt ions in the concentrated water are replaced by the hydroxide ions in the anion exchange unit 321, the negative salt ions are adsorbed by the anion exchange unit 321, and the hydroxide ions are replaced; the hydroxyl ions and the hydrogen ions react to generate water which is discharged in the form of pure water.
In this embodiment, the cation exchange unit 311, the anion exchange unit 321, the first cation exchange membrane 312, the second cation exchange membrane 313, and the anion exchange membrane 322 are arranged in parallel.
In the water purification system of the present embodiment, as shown in fig. 3, the electric regenerative filter unit 300 is further provided with a regenerative water path, a positive electrode plate and a negative electrode plate for electrolyzing water;
the regeneration water path is provided with a first regeneration water path 330 and a second regeneration water path 340, the anion exchange membrane 322 forms part of the structure of the first regeneration water path 330, and the first cation exchange membrane 312 forms part of the structure of the second regeneration water path 340; the positive electrode plate is disposed on the side of the first regeneration water passage 330 remote from the anion exchange membrane 322, and the negative electrode plate is disposed on the side of the second regeneration water passage 340 remote from the cation exchange membrane.
In the regeneration working condition, the desalination water path is closed, the electrolysis voltage is applied, and the regenerated water passes through the first regeneration water path 330 and the second regeneration water path 340 in sequence and then is discharged as concentrated water;
under the condition of applying an electrolytic voltage, water generated from hydrogen ions and hydroxyl ions permeating through the second cation exchange membrane 313 during desalination is decomposed into hydrogen ions and hydroxyl ions again, the hydroxyl ions enter the anion exchange unit 321 along with non-electrolyzed water to replace salt anions, the replaced salt anions move towards the positive plate, and under the condition of electric attraction of the positive plate, the replaced salt anions enter the first regenerated water path 330 through the anion exchange membrane 322;
meanwhile, the hydrogen ions move towards the negative plate, and in the process of moving the hydrogen ions, the hydrogen ions enter the cation exchange unit 311 through the second cation exchange membrane 313 to replace the salt positive ions, and under the condition of electric attraction of the negative plate, the replaced salt positive ions enter the second regeneration water channel 340 through the first cation exchange membrane 312; in the second regeneration water path 340, the replaced salt positive ions and salt negative ions are combined, and finally discharged as concentrated water from the second regeneration water path 340.
The utility model discloses a water purification system still is provided with control valve 400, and control valve 400 sets up in the water inlet department of electricity regeneration filter unit 300. In the shutdown condition, if the water quality of the produced water of the membrane filtration unit 200 is detected to meet the requirement, the control valve 400 controls the valve 400 to be closed, and all or part of the concentrated water produced by the membrane filtration unit 200 in the water purification condition is forbidden to be input into the electric regeneration filtration unit 300.
The utility model discloses a water purification system still is provided with leading filter unit 100, and leading filter unit 100 sets up in water intake pipe department.
When the water purification working condition is carried out, the raw water is firstly subjected to primary pre-filtration treatment by the pre-filtration unit 100, and then the filtered water is discharged into the membrane filtration unit 200 for secondary filtration treatment, so that the water is purified, and the proportion of the pure wastewater is improved.
The water purification system solves the problem that the content of pure water discharged by the water purifier after standing for a long time is high, and simultaneously replaces salt positive ions and salt negative ions after desalting for a long time, so that the service life of the electric regeneration filter element can be prolonged.
Example 2.
A water purification system, which is different from embodiment 1 in that the water purification system in this embodiment is further provided with a water quality detector, and the water quality detector is disposed at a pure water outlet pipeline of the electrical regeneration filter unit 300.
When the device is shut down, whether the TDS value of the pure water produced by the electric regeneration filtering unit 300 is less than or equal to D is judged, if so, the pure water is discharged from a pure water outlet pipeline of the membrane filtering unit 200 under the next pure water working condition; if not, the concentrated water is discharged into the electric regeneration filtering unit 300 through a concentrated water outlet pipeline of the membrane filtering unit 200 to continue the filtering treatment until the water quality TDS meets the condition.
Specifically, in this embodiment, D takes a value of 0 to 9. The lower the TDS value, the better the water quality effect, and the higher the TDS value, the more impurities contained in the water.
This water purification system when shutting down the operating mode, will not conform to the water quality requirement water and carry out the loop filter and handle until satisfying the requirement, has solved the higher problem of water purifier discharge pure water content after standing for a long time, has optimized user's experience.
Example 3.
A water purification system, the other structures are the same as those of embodiment 1 or 2, and the difference lies in that: the cation exchange unit 311 in the present embodiment is provided as a cation exchange resin.
The cation exchange resin in this embodiment may be a strongly acidic cation exchange resin, a weakly acidic cation exchange resin, or a combination of a strongly acidic cation exchange resin and a weakly acidic cation exchange resin. It should be noted that those skilled in the art can make the setting according to actual needs, and no specific requirements are required here.
The anion exchange unit 321 in this embodiment is provided as an anion exchange resin. The anion exchange resin can be a strongly basic anion exchange resin, a weakly basic anion exchange resin, or a combination of both. It should be noted that those skilled in the art can make the setting according to actual needs, and no specific requirements are required here.
Example 4.
A water purification system, the other structures are the same as the embodiment 1, 2 or 3, and the difference lies in that: in the present embodiment, the pre-filter unit 100 is configured as a PP cotton filter element or an activated carbon filter element.
Specifically, the PP cotton filter element can effectively remove various particle impurities in the filtered liquid and has the characteristics of large filtering flow and small pressure difference. It should be noted that, as those skilled in the art can freely arrange the filter element of the pre-filter unit 100, the description is omitted.
The membrane filtration unit 200 in this embodiment is configured as a reverse osmosis cartridge. Under certain pressure, water molecules can pass through the RO membrane, and impurities such as inorganic salt, heavy metal ions, organic matters, colloid, bacteria, viruses and the like in raw water cannot pass through the RO membrane.
The electrically regenerated filter unit 300 in this embodiment is configured as an electrically regenerated resin filter element, and has a good organic matter adsorbing effect.
The benefits of this embodiment over embodiment 1 are: when shutting down, use electrical regeneration filter unit 300 can reduce the water purifier after long-term standing and discharge the salt content of first cup of pure water when next water purification operating mode, optimize user's experience.
Example 5.
A water purifier having the water purifying system as in embodiment 1 is provided with a membrane filtration unit 200 and an electric regeneration filtration unit 300, and a concentrated water outlet pipe of the membrane filtration unit 200 is communicated with an inlet pipe of the electric regeneration filtration unit 300.
When the device is shut down, all or part of concentrated water produced by the membrane filtration unit 200 under the water purification working condition is input into the electric regeneration filtration unit 300, and is treated by the electric regeneration filtration unit 300 to obtain pure water, and the pure water flows back to the water inlet pipeline of the membrane filtration unit 200 from the circulating flow channel to be used as the inlet water of the membrane filtration unit 200;
when the water quality meets the requirement, the water is discharged through the pure water outlet pipeline under the next water purification working condition, and if not, the water is discharged into the electric regeneration filtering unit 300 through the concentrated water outlet pipeline to continue filtering treatment until the water quality meets the requirement.
Specifically, the determination method in this embodiment may be various, and may be to determine whether the water quality of the produced water of the membrane filtration unit 200 meets the requirement, determine whether the pure water produced by the electrical regeneration filtration unit 300 meets the water quality requirement, or determine other positions. It should be noted that, when performing specific setting, a person skilled in the art may select and determine the setting according to actual situations, and the setting is not limited specifically here.
In the following, for example, the water purifier system is further provided with a water quality detector, and the water quality detector is arranged at the water outlet pipe of the membrane filtration unit 200.
When the water purifier is stopped, whether the TDS value of the water produced by the membrane filtration unit 200 is less than or equal to C is judged by the water quality detector, and if so, the water is discharged from the pure water outlet pipeline under the next pure water working condition; if not, discharging the water quality which does not meet the requirements into the electric regeneration filtering unit 300 through a concentrated water outlet pipeline to continue filtering treatment until the water quality TDS meets the conditions. When shutting down, through carrying out the circulation to the water that does not satisfy the quality of water requirement and handling, can solve the first cup of pure water salt content too high problem of discharge when next water purification operating mode.
Specifically, in this embodiment, the value of C is 0 to 9. The lower the TDS value, the better the water quality effect, and the higher the TDS value, the more impurities contained in the water.
In the water purifier of the present embodiment, the electric regenerative filter unit 300 of the water purification system is provided with a desalination water path. As shown in fig. 2, the desalination water channel is provided with a cation exchange unit 311 and an anion exchange unit 321, the cation exchange unit 311 is interposed between a first cation exchange membrane 312 and a second cation exchange membrane 313, and an anion exchange membrane 322 is provided at one end of the anion exchange unit 321 away from the second cation exchange membrane 313.
The first cation exchange membrane 312, the second cation exchange membrane 313, and the cation exchange unit 311 in the present embodiment constitute a first desalination water channel 310 during desalination, and the anion exchange membrane 322 and the anion exchange unit 321 constitute a second desalination water channel 320 during desalination.
In the desalination working condition, the regeneration water path is closed, no electrolysis voltage is applied, and all or part of the concentrated water input into the electric regeneration filtering unit 300 passes through the first desalination water path 310 and the second desalination water path 320 and then is discharged as pure water;
in the first desalination water path 310, positive salt ions to be desalinated in the concentrated water are replaced by hydrogen ions in the cation exchange unit 311, the positive salt ions are adsorbed by the cation exchange unit 311, the hydrogen ions are replaced, and the replaced hydrogen ions enter the second desalination water path 320 along with the concentrated water; in the second desalination water path 320, the negative salt ions in the concentrated water are replaced by the hydroxide ions in the anion exchange unit 321, the negative salt ions are adsorbed by the anion exchange unit 321, and the hydroxide ions are replaced; the hydroxyl ions and the hydrogen ions react to generate water which is discharged in the form of pure water.
In this embodiment, the cation exchange unit 311, the anion exchange unit 321, the first cation exchange membrane 312, the second cation exchange membrane 313, and the anion exchange membrane 322 are arranged in parallel.
In the water purification system of the present embodiment, as shown in fig. 3, the electric regenerative filter unit 300 is further provided with a regenerative water path, a positive electrode plate and a negative electrode plate for electrolyzing water;
the regeneration water path is provided with a first regeneration water path 330 and a second regeneration water path 340, the anion exchange membrane 322 forms part of the structure of the first regeneration water path 330, and the first cation exchange membrane 312 forms part of the structure of the second regeneration water path 340; the positive electrode plate is disposed on the side of the first regeneration water passage 330 remote from the anion exchange membrane 322, and the negative electrode plate is disposed on the side of the second regeneration water passage 340 remote from the cation exchange membrane.
In the regeneration working condition, the desalination water path is closed, the electrolysis voltage is applied, and the regenerated water passes through the first regeneration water path 330 and the second regeneration water path 340 in sequence and then is discharged as concentrated water;
under the condition of applying an electrolytic voltage, water generated from hydrogen ions and hydroxyl ions permeating through the second cation exchange membrane 313 during desalination is decomposed into hydrogen ions and hydroxyl ions again, the hydroxyl ions enter the anion exchange unit 321 along with non-electrolyzed water to replace salt anions, the replaced salt anions move towards the positive plate, and under the condition of electric attraction of the positive plate, the replaced salt anions enter the first regenerated water path 330 through the anion exchange membrane 322;
meanwhile, the hydrogen ions move towards the negative plate, and in the process of moving the hydrogen ions, the hydrogen ions enter the cation exchange unit 311 through the second cation exchange membrane 313 to replace the salt positive ions, and under the condition of electric attraction of the negative plate, the replaced salt positive ions enter the second regeneration water channel 340 through the first cation exchange membrane 312; in the second regeneration water path 340, the replaced salt positive ions and salt negative ions are combined, and finally discharged as concentrated water from the second regeneration water path 340.
The cation exchange unit 311 in the present embodiment is provided as a cation exchange resin.
The cation exchange resin in this embodiment may be a strongly acidic cation exchange resin, a weakly acidic cation exchange resin, or a combination of a strongly acidic cation exchange resin and a weakly acidic cation exchange resin. It should be noted that those skilled in the art can make the setting according to actual needs, and no specific requirements are required here.
The anion exchange unit 321 in this embodiment is provided as an anion exchange resin. The anion exchange resin can be a strongly basic anion exchange resin, a weakly basic anion exchange resin, or a combination of both. It should be noted that those skilled in the art can make the setting according to actual needs, and no specific requirements are required here.
The utility model discloses a water purifier, water purification system still are provided with control valve 400, and control valve 400 sets up in the water inlet department of electricity regeneration filter unit 300. In the shutdown condition, if the water quality of the produced water of the membrane filtration unit 200 is detected to meet the requirement, the control valve 400 controls the valve 400 to be closed, and all or part of the concentrated water produced by the membrane filtration unit 200 in the water purification condition is forbidden to be input into the electric regeneration filtration unit 300.
The utility model discloses a water purifier, water purification system still are provided with leading filter unit 100, and leading filter unit 100 sets up in water intake pipe department.
When the water purification working condition is carried out, the raw water is firstly subjected to primary pre-filtration treatment by the pre-filtration unit 100, and then the filtered water is discharged into the membrane filtration unit 200 for secondary filtration treatment, so that the water is purified, and the proportion of the pure wastewater is improved.
The water purifier solves the problem that the content of pure water discharged after the water purifier is kept still for a long time is high, and simultaneously, salt positive ions and salt negative ions after long-term desalination are replaced, so that the service life of the electric regeneration filter element can be prolonged.
Example 6.
A water purifier, which is different from the water purifier of embodiment 5 in that the water purification system of the water purifier of this embodiment is further provided with a water quality detector, and the water quality detector is disposed at the pure water outlet pipeline of the electrical regeneration filter unit 300.
When the device is shut down, whether the TDS value of the pure water produced by the electric regeneration filtering unit 300 is less than or equal to C is judged, if yes, the pure water is discharged from a pure water outlet pipeline of the membrane filtering unit 200 under the next pure water working condition; if not, the concentrated water is discharged into the electric regeneration filtering unit 300 through a concentrated water outlet pipeline of the membrane filtering unit 200 to continue the filtering treatment until the water quality TDS meets the condition.
Specifically, in this embodiment, the value of C is 0 to 9. The lower the TDS value, the better the water quality effect, and the higher the TDS value, the more impurities contained in the water.
This water purifier, water purification system carry out the loop filter processing until meeting the demands with the water that does not conform to the quality of water requirement when shutting down the operating mode, have solved the higher problem of water purifier discharge pure water content after standing for a long time, have optimized user's experience.
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 (11)
1. A water purification system, its characterized in that: the device is provided with a membrane filtering unit and an electric regeneration filtering unit, wherein a concentrated water outlet pipe of the membrane filtering unit is communicated with a water inlet pipe of the electric regeneration filtering unit;
when the machine is stopped, all or part of concentrated water produced by the membrane filtration unit under the water purification working condition is input into the electric regeneration filtration unit, the pure water is obtained after being treated by the electric regeneration filtration unit, and the pure water flows back to a water inlet pipeline of the membrane filtration unit from the circulating flow passage and is used as inlet water of the membrane filtration unit;
and when the water quality meets the requirement, discharging the water through the pure water outlet pipeline under the next water purification working condition, and if not, discharging the water into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality meets the requirement.
2. The water purification system of claim 1, wherein: the electric regeneration filtering unit is provided with a desalination water path;
the desalting water path is provided with a cation exchange unit and an anion exchange unit, the cation exchange unit is clamped between a first cation exchange membrane and a second cation exchange membrane, and one end of the anion exchange unit, which is far away from the second cation exchange membrane, is provided with an 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, and the anion exchange membrane and the anion exchange unit form a second desalination water path during desalination.
3. The water purification system of claim 2, wherein: in the desalting working condition, the regeneration water path is closed, no electrolytic voltage is applied, and all or part of concentrated water input into the electric regeneration filtering unit is discharged as pure water after passing through the first desalting water path and the second desalting water path;
in the first desalination water path, positive salt ions to be desalinated in the concentrated 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 concentrated water; in the second desalting water path, the salt negative ions in the concentrated 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 and the hydrogen ions react to generate water which is discharged in the form of pure water.
4. The water purification system of claim 1, wherein: the electric regeneration filtering unit is also provided with a regeneration water path, a positive plate and a negative plate for electrolyzing 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, and the first cation exchange membrane forms part of the structure of the second regeneration water path; the positive plate sets up in the one side of keeping away from anion exchange membrane in first regeneration water route, and the negative plate sets up in the one side of keeping away from cation exchange membrane in second regeneration water route.
5. The water purification system of claim 4, wherein: in the regeneration working condition, the desalination water path is closed, the electrolysis voltage is applied, and the regenerated water passes through the first regeneration water path and the second regeneration water path in sequence and then is discharged as concentrated water;
under the condition of applying electrolysis voltage, water generated by hydrogen ions and hydroxide ions permeating through the second cation exchange membrane in the desalting process is decomposed into hydrogen ions and hydroxide ions again, the hydroxide ions enter the anion exchange unit along with the water not electrolyzed to replace salt negative ions, the replaced salt negative ions move towards the positive plate, and under the condition of electric attraction of the positive plate, the replaced salt negative ions penetrate through the anion exchange membrane to enter the first regeneration water path;
meanwhile, hydrogen ions move towards the negative plate, and in the process of moving the hydrogen ions, the hydrogen ions enter the cation exchange unit through the second cation exchange membrane to be replaced by salt positive ions, and under the condition of electric attraction of the negative plate, the replaced salt positive ions enter the second regeneration water path through the first cation exchange membrane;
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.
6. The water purification system of claim 1, wherein: the water quality detector is arranged at the water outlet pipe of the membrane filtration unit;
when the machine is shut down, judging whether the TDS value of the water quality of the water produced by the membrane filtration unit is less than or equal to C, if so, discharging the water by a pure water outlet pipeline under the next pure water working condition; if not, the concentrated water is discharged into the electric regeneration filtering unit through the concentrated water outlet pipeline to continue filtering treatment until the water quality TDS meets the conditions.
7. The water purification system of claim 1, wherein: the water quality detector is arranged at the pure water outlet pipeline of the electric regeneration filtering unit;
when the device is shut down, judging whether the TDS value of the pure water produced by the electric regeneration filtering unit is less than or equal to D, if so, discharging the pure water from a pure water outlet pipeline of the membrane filtering unit under the next water purification working condition; if not, the concentrated water is discharged into the electric regeneration filtering unit through a concentrated water outlet pipeline of the membrane filtering unit to continue filtering treatment until the water quality TDS meets the condition.
8. The water purification system of claim 1, wherein: the water inlet of the electric regeneration filtering unit is provided with a water inlet, and the water inlet is provided with a control valve.
9. The water purification system of claim 2, wherein: the cation exchange unit is set as cation exchange resin, and the cation exchange resin is one of strong acid cation exchange resin, weak acid cation exchange resin or the combination of the two;
the anion exchange unit is set as anion exchange resin, and the anion exchange resin is one of strong-base anion exchange resin, weak-base anion exchange resin or the combination of the two.
10. The water purification system of claim 1, wherein: the water inlet device is also provided with a preposed filtering unit which is arranged at the water inlet pipeline.
11. A water purifier is characterized in that: a water purification system as claimed in any one of claims 1 to 10.
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| CN111233094A (en) * | 2020-03-16 | 2020-06-05 | 佛山市云米电器科技有限公司 | Water purification system and water purifier |
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Effective date of registration: 20211103 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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