CN109502709B - Water purifier capable of producing alkalescent electrodialysis water and method for manufacturing alkalescent water - Google Patents
Water purifier capable of producing alkalescent electrodialysis water and method for manufacturing alkalescent water Download PDFInfo
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- CN109502709B CN109502709B CN201910039386.XA CN201910039386A CN109502709B CN 109502709 B CN109502709 B CN 109502709B CN 201910039386 A CN201910039386 A CN 201910039386A CN 109502709 B CN109502709 B CN 109502709B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 357
- 238000000909 electrodialysis Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title abstract description 12
- 238000001728 nano-filtration Methods 0.000 claims abstract description 82
- 238000003860 storage Methods 0.000 claims abstract description 55
- 239000013505 freshwater Substances 0.000 claims abstract description 24
- 239000008399 tap water Substances 0.000 claims abstract description 23
- 235000020679 tap water Nutrition 0.000 claims abstract description 23
- 238000000746 purification Methods 0.000 claims abstract description 9
- 239000002351 wastewater Substances 0.000 claims description 40
- 238000011084 recovery Methods 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000008213 purified water Substances 0.000 abstract description 17
- 230000035622 drinking Effects 0.000 abstract description 11
- 235000020188 drinking water Nutrition 0.000 abstract description 10
- 239000003651 drinking water Substances 0.000 abstract description 10
- 230000007774 longterm Effects 0.000 abstract description 8
- 239000002253 acid Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000003014 ion exchange membrane Substances 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the technical field of water purification equipment, in particular to a water purifier producing weakly alkaline electrodialysis and a method for manufacturing weakly alkaline water, wherein the water purifier producing weakly alkaline electrodialysis comprises: the device comprises a machine body, a nanofiltration filter element, a water storage tank and an electrodialyzer; the device comprises a machine body, a nanofiltration filter element, a water storage tank, an electrodialyzer and a fresh water chamber, wherein the machine body is of a hollow structure, the nanofiltration filter element, the water storage tank and the electrodialyzer are all arranged in the machine body, the nanofiltration filter element, the water storage tank and the electrodialyzer are sequentially connected, and one end of the nanofiltration filter element is also connected with the fresh water chamber of the electrodialyzer; according to the manufacturing method for the alkalescent electrodialysis water purifier and the alkalescent water, the nanofiltration machine is coupled with the electrodialyzer, so that the purified water formed after the tap water is purified by the nanofiltration filter element is treated by the electrodialyzer to form alkaline water, the problem that the traditional water purifier produces weak acid is solved, the traditional water purifier is suitable for long-term drinking of human bodies, and the requirement of healthy drinking water of family members is met.
Description
Technical Field
The invention relates to the technical field of water purification equipment, in particular to a water purifier capable of producing water by alkalescent electrodialysis and a method for manufacturing alkalescent water.
Background
Along with the improvement of living standard of people, the requirement of people on the quality of drinking water is gradually improved, the application of water purifiers in resident families is more and more common, and the water purifiers in the current market are divided from the principle, and mainly comprise an ultrafiltration water purifier, a nanofiltration water purifier and a reverse osmosis water purifier; the normal pH of human tissues is between 7.0 and 7.4, the normal pH of blood is between 7.35 and 7.45, and the drinking of weak alkaline water is important for guaranteeing the health of human bodies, however, the water produced by the ultrafiltration water purifier, the nanofiltration water purifier or the reverse osmosis water purifier is weak in acid, and the pH is between 5.5 and 6.5, so that the water is not beneficial to long-term drinking.
Disclosure of Invention
The invention aims to provide a water purifier producing weakly alkaline electrodialysis water and a method for manufacturing weakly alkaline water, and aims to solve the technical problem that water produced by the water purifier is weakly acidic in the prior art.
The invention provides a water purifier for electrodialysis with alkalescent water production, which comprises: the device comprises a machine body, a nanofiltration filter element, a water storage tank and an electrodialyzer; wherein, the fuselage is inside hollow structure, receive and strain the filter core, the water storage tank and the electrodialyzer all sets up in the fuselage, just receive and strain the filter core, the water storage tank and the electrodialyzer is connected in order, just one end of receiving and strain the filter core still with the fresh water room of electrodialyzer is connected.
In the above technical solution, further, the nanofiltration filter element includes a filter flask and a nanofiltration membrane; the nanofiltration membrane is arranged in the filter flask, and the water outlet end of the nanofiltration filter flask is respectively connected with the water storage tank and the electrodialyzer; the nanofiltration filter flask is also provided with a concentrated water discharge port which is connected with a wastewater port of the machine body.
In any of the above technical solutions, further, the water storage tank is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet; the first water inlet is connected with the water outlet end of the nanofiltration filter flask, the second water inlet is connected with the anode chamber of the electrodialyzer, the first water outlet is connected with the concentrated water chamber of the electrodialyzer, and the second water outlet is connected with the wastewater outlet of the machine body.
In any of the above technical solutions, further, the water storage tank further includes a magnetic circulation pump, the magnetic circulation pump is disposed at the first water outlet, and the magnetic circulation pump is used for promoting water circulation between the electrodialyzer and the water storage tank.
In any one of the above technical schemes, further, still include and just strain the filter core, just strain the one end of filter core with the water inlet of fuselage is connected, just strain the other end of filter core with it is connected to strain the filter core.
In any of the above technical solutions, further, the primary filter element is a PP cotton and activated carbon composite filter element.
In any of the above technical solutions, further, the device further comprises a rear filter element, wherein a water inlet end of the rear filter element is connected with a cathode chamber of the electrodialyzer, and a water outlet end of the rear filter element is connected with a water outlet of the machine body.
In any one of the above technical solutions, further, the water purifier further comprises a wastewater recycling tank, wherein the wastewater recycling tank is connected with the wastewater port of the machine body through a pipeline, and the wastewater recycling tank is used for collecting wastewater generated in the water purifying process.
In any of the above technical solutions, the apparatus further comprises a controller, and the controller is configured to control the electrodialyzer to perform electrode reversal.
The invention also provides a method for preparing the weakly alkaline water, which comprises the following steps:
tap water flows into a primary filter element through a water inlet of a machine body, the tap water flows into a nanofiltration filter element after being purified by the primary filter element, fresh water treated by the nanofiltration filter element is divided into two paths, wherein one path of the fresh water flows into a water storage tank from a first water inlet, the other path of the fresh water flows into a cathode chamber of an electrodialyzer through a fresh water chamber of the electrodialyzer, alkaline water treated by the cathode chamber of the electrodialyzer flows out of the cathode chamber of the electrodialyzer, then flows into a post-filter element for further purification treatment, and then flows out of a water outlet of the machine body;
concentrated water generated after the nanofiltration filter element is treated flows into a wastewater recovery barrel through a wastewater port of the machine body;
the concentrated water in the water storage tank flows out from the first water outlet under the action of the magnetic circulating pump and flows into the concentrated water chamber of the electrodialyzer, then flows into the anode chamber of the electrodialyzer, and the acidic water treated by the anode chamber of the electrodialyzer flows into the water storage tank through the second water inlet and flows into the wastewater recovery barrel through the second water outlet and the wastewater port of the machine body in sequence.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a water purifier capable of producing water by alkalescent electrodialysis, which comprises: the device comprises a machine body, a nanofiltration filter element, a water storage tank and an electrodialyzer; the machine body is of a hollow structure, and the nanofiltration filter element, the water storage tank and the electrodialyzer are all arranged in the machine body, so that tap water can flow into the nanofiltration filter element, the water storage tank and the electrodialyzer through a water inlet formed in the machine body; the nanofiltration filter element, the water storage tank and the electrodialyzer are sequentially connected, one end of the nanofiltration filter element is also connected with a fresh water chamber of the electrodialyzer, so that tap water is firstly purified by the nanofiltration filter element, then the purified water treated by the nanofiltration filter element flows into the water storage tank and the fresh water chamber of the electrodialyzer respectively and then flows into a cathode chamber of the electrodialyzer to be subjected to alkalinity improvement treatment, water in the water storage tank can flow into the electrodialyzer, and enough liquid in a concentrated water chamber of the electrodialyzer can circulate, so that the electrodialyzer can normally work; the alkaline water formed by the treatment of the electrodialyzer flows out from a water outlet arranged on the machine body for family members to drink daily, thereby meeting the requirement of healthy drinking water.
Specifically, when the weak alkaline electrodialysis water purifier is used, the machine body is installed at a proper position, generally, kitchen-following installation or wall-hanging installation is adopted, a water inlet of the machine body is connected with a tap water pipeline, a water path is connected, tap water can flow into a nanofiltration filter element arranged in the machine body through the water inlet of the machine body, part of purified water purified by the nanofiltration filter element flows into a water storage tank, the other part of purified water flows into a cathode chamber of the electrodialyzer for treatment, the purified water flowing into the water storage tank flows into an anode chamber of the electrodialyzer, the electrodialyzer can normally operate, and the purified water passing through the cathode chamber of the electrodialyzer forms weak alkaline water after treatment and flows out of a water outlet arranged on the machine body for daily drinking of family members.
Therefore, the water produced by the weak-alkaline electrodialysis water purifier is coupled with the nanofiltration machine and the electrodialyzer, so that the purified water formed after the tap water is purified by the nanofiltration filter element is treated by the electrodialyzer to form alkaline water, the weak acid produced by the traditional water purifier is avoided, the traditional water purifier is suitable for long-term drinking of human bodies, and the requirement of healthy drinking water of family members is met.
According to the method for manufacturing the alkalescent water, the water produced by the alkalescent electrodialysis water purifier is used, so that the purified water generated after the tap water is purified by the nanofiltration filter element is treated by the electrodialyzer again to generate alkalescent water which can work only by the water pressure of the tap water, a pressure pump is not required to be additionally arranged, the water is immediately discharged, the method is simple to use and short in time consumption, and the requirement of family members on healthy drinking water is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a water purifier capable of producing water by weak alkaline electrodialysis according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a nanofiltration water purifier with weakly alkaline water production according to an embodiment of the present invention;
fig. 3 is a schematic partial structural view of a water purifier capable of producing water by weak alkaline electrodialysis according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another part of a water purifier capable of producing water by weak alkaline electrodialysis according to an embodiment of the present invention.
Reference numerals:
1-machine body, 2-nanofiltration filter element, 3-water storage tank, 301-first water inlet, 302-second water inlet, 303-first water outlet, 304-second water outlet, 4-electrodialyzer, 401-fresh water chamber, 402-cathode chamber, 403-concentrated water chamber, 404-anode chamber, 5-magnetic circulating pump, 6-prefiltering filter element, 7-post filter element and 8-wastewater recycling tank.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following describes a water purifier for producing water by weak alkaline electrodialysis and a method for producing weak alkaline water according to some embodiments of the present invention with reference to fig. 1 to 4.
Referring to fig. 1 to 3, an embodiment of the present invention provides a water purifier capable of producing water with weak alkaline electrodialysis, including: a machine body 1, a nanofiltration filter element 2, a water storage tank 3 and an electrodialyzer 4; the machine body 1 is of a hollow structure, and the nanofiltration filter element 2, the water storage tank 3 and the electrodialyzer 4 are all arranged in the machine body 1, so that tap water can flow into the nanofiltration filter element 2, the water storage tank 3 and the electrodialyzer 4 through a water inlet formed in the machine body 1; the nanofiltration filter element 2, the water storage tank 3 and the electrodialyzer 4 are sequentially connected, one end of the nanofiltration filter element 2 is also connected with a fresh water chamber 401 of the electrodialyzer 4, so that tap water is firstly purified by the nanofiltration filter element 2, then the purified water treated by the nanofiltration filter element 2 flows into the water storage tank 3 and the fresh water chamber 401 of the electrodialyzer 4 respectively and then flows into a cathode chamber 402 of the electrodialyzer 4 for alkalinity improvement treatment, water in the water storage tank 3 can flow into the electrodialyzer 4, and enough liquid is circulated in the concentrated water chamber 403 of the electrodialyzer 4, so that the electrodialyzer 4 can normally work; the alkaline water formed by the treatment of the electrodialyzer 4 flows out from a water outlet arranged on the machine body 1 for family members to drink daily, thereby meeting the requirement of healthy drinking water.
Specifically, when the weak alkaline electrodialysis water purifier is used, the body 1 is installed at a proper position, generally, kitchen-type installation or wall-mounted installation is adopted, a water inlet of the body 1 is connected with a tap water pipeline, a water path is connected, tap water can flow into the nanofiltration filter element 2 arranged in the body 1 through the water inlet of the body 1, part of purified water purified by the nanofiltration filter element 2 flows into the water storage tank 3, the other part of purified water flows into the cathode chamber 402 of the electrodialyzer 4 for treatment, the purified water flowing into the water storage tank 3 flows into the anode chamber 404 of the electrodialyzer 4, so that the electrodialyzer 4 can normally operate, and the purified water passing through the cathode chamber 402 of the electrodialyzer 4 forms weak alkaline water after treatment and flows out from a water outlet arranged on the body 1, so as to be drunk by family members daily.
Therefore, the water produced by the weak alkaline electrodialysis water purifier is coupled with the nanofiltration machine and the electrodialyzer 4, so that the purified water formed after the tap water is purified by the nanofiltration filter element 2 is treated by the electrodialyzer 4 to form alkaline water, the weak acid produced by the traditional water purifier is avoided, the traditional water purifier is suitable for long-term drinking of human bodies, and the requirement of healthy drinking water of family members is met.
In one embodiment of the present invention, preferably, as shown in fig. 1 to 3, the nanofiltration cartridge 2 includes a filter flask and a nanofiltration membrane; wherein the nanofiltration membrane is arranged in the filter flask, and the water outlet end of the nanofiltration filter flask is respectively connected with the water storage tank 3 and the electrodialyzer 4; the nanofiltration filter flask is also provided with a concentrated water discharge port which is connected with a wastewater port of the machine body 1.
In this embodiment, a part of the purified water purified by the nanofiltration cartridge 2 sequentially flows into the fresh water chamber 401 of the electrodialyzer 4 and the cathode chamber 402 of the electrodialyzer 4, and a hydrogen evolution reaction occurs in the cathode chamber 402, so that the water flowing out of the cathode chamber 402 of the electrodialyzer 4 is weakly alkaline water, which is good for human drinking, and by adjusting the current density to 3-50mA/m2The total solid salt content of the water produced by the electrodialyzer 4 can be controlled, so that the total solid salt content of the water produced by the electrodialyzer 4 can be adjusted by adjusting the current density, the water produced by the electrodialyzer 4 is not only alkalescent, but also retains beneficial mineral substances, and the electrodialyzer is suitable for long-term drinking.
Wherein, optionally, the nanofiltration membrane is a DF30 low-pressure selective nanofiltration membrane, the recovery rate is 90% -95%, the total desalination rate is 8% -15%, the retention rate for sulfate radicals is more than 90%, most of sulfate radicals and organic matters can be retained, and irreversible pollution caused by calcium carbonate to an ion exchange membrane of the electrodialyzer 4 is avoided.
In one embodiment of the present invention, preferably, as shown in fig. 1 to 3, the water storage tank 3 is provided with a first water inlet 301, a second water inlet 302, a first water outlet 303 and a second water outlet 304; wherein, the first water inlet 301 is connected with the water outlet end of the nanofiltration filter flask, the second water inlet 302 is connected with the anode chamber 404 of the electrodialyzer 4, the first water outlet 303 is connected with the concentrated water chamber 403 of the electrodialyzer 4, and the second water outlet 304 is connected with the wastewater outlet of the machine body 1.
In this embodiment, another part of the purified water purified by the nanofiltration filter element 2 flows into the water storage tank 3 through the first water inlet 301, the water in the water storage tank 3 flows out through the first water outlet 303, and then sequentially flows into the concentrated water chamber 403 and the anode chamber 404 of the electrodialyzer 4 and undergoes an oxygen evolution reaction in the anode chamber 404 of the electrodialyzer 4 to form concentrated water, i.e., weakly acidic water, the concentrated water formed by the electrodialyzer 4 flows into the water storage tank 3 through the second water inlet 302, and the concentrated water in the water storage tank 3 flows out through the second water outlet 304 and is discharged through the wastewater outlet of the machine body 1;
concentrated water formed in the anode chamber 404 of the electrodialyzer 4 is replaced in sequence in batches, when the water recovery rate of the electrodialyzer 4 reaches 70% -80%, new concentrated water is discharged and replaced, the calcium carbonate scaling index (L.S.I value) of the concentrated water is not more than 1.3 at most, electrodialysis concentrated water circulates rapidly between a concentrated water storage tank and an electrodialysis concentrated chamber, a water channel is not required to be additionally introduced, the concentrated water flowing out of the anode chamber 404 of the electrodialyzer 4 is fully utilized, a large amount of water resources are saved, the linear velocity of the surface water flow of the diaphragm of the concentrated water chamber 403 is 2-10cm/s, the surface shearing force formed by high-flow-velocity water flow can effectively avoid scaling on the surface of an ionic membrane, the pollution of the ionic exchange membrane is reduced, the service life is prolonged to the greatest extent, and the maintenance cost is reduced.
Wherein, optionally, the electrodialyzer 4 is a conventional electrodialyzer 4 in the prior art, which can be fully understood by those skilled in the art and will not be described again.
In one embodiment of the present invention, preferably, as shown in fig. 1 to 3, a magnetic circulation pump 5 is further included, the magnetic circulation pump 5 is disposed at the first water outlet 303, and the magnetic circulation pump 5 is used to facilitate water circulation between the electrodialyzer 4 and the water storage tank 3.
In this embodiment, the magnetic circulation pump 5 is a magnetic circulation pump 5 commonly used in the prior art and the market, and those skilled in the art can fully understand the magnetic circulation pump and will not be described again.
In one embodiment of the present invention, preferably, as shown in fig. 1 to 3, a primary filter element 6 is further included, one end of the primary filter element 6 is connected to the water inlet of the body 1, and the other end of the primary filter element 6 is connected to the nanofiltration filter element 2.
In this embodiment, the one end of prefiltering filter core 6 is connected with the water inlet of fuselage 1, and the other end is connected with nanofiltration filter core 2 for the running water tentatively purifies through prefiltering filter core 6, flows into after taking out silt, rust, chlorine residue, COD and the particulate impurity in the running water and receives nanofiltration filter core 2, strengthens purifying effect, can also prolong the life of nanofiltration filter core 2.
In one embodiment of the present invention, the primary filter element 6 is preferably a PP cotton and activated carbon composite filter element, as shown in fig. 1 to 3.
In this embodiment, the PP cotton and activated carbon composite filter element is a water purification filter element commonly used in the prior art and on the market, and those skilled in the art can fully understand the filter element and will not be described again.
Optionally, the primary filter element 6 may also be a micro-filter element, an ultra-filter element, or a ceramic micro-porous filter, although not limited thereto.
In one embodiment of the present invention, as shown in fig. 1 to 3, it is preferable to further include a post-filter element 7, and the water inlet end of the post-filter element 7 is connected to the cathode chamber 402 of the electrodialyzer 4, and the water outlet end of the post-filter element 7 is connected to the water outlet of the machine body 1.
In this embodiment, the weakly alkaline water treated by the cathode chamber 402 of the electrodialyzer 4 first passes through the post-filter element 7, and then flows out from the water outlet of the body 1 after the weakly alkaline water inlet is improved, so as to improve the drinking water quality.
Wherein, optionally, the post-filter element 7 is a post-activated carbon filter element, but not limited thereto.
In one embodiment of the present invention, as shown in fig. 1 to 3, it is preferable that a wastewater recovery tank 8 is further included, the wastewater recovery tank 8 is connected to the wastewater port of the body 1 through a pipeline, and the wastewater recovery tank 8 is used for collecting wastewater generated in the water purification process.
In this embodiment, the concentrated water generated by the treatment of the anode chamber 404 of the electrodialyzer 4 and the wastewater generated by the purification process of the nanofiltration filter element 2 flow into the wastewater recovery tank 8 through the wastewater outlet of the body 1, so as to avoid the problem of water leakage caused by the real-time discharge of wastewater and cause economic loss, and the wastewater collected by the wastewater recovery tank 8 can be used for watering flowers and cleaning, thereby achieving the additional effect of saving water resources.
In one embodiment of the present invention, it is preferable that a controller for controlling the electrodialyzer 4 to perform the polarity inversion is further included, as shown in fig. 1 to 3.
In this embodiment, the controller controls the dc power supply of the electrodialyzer 4 to perform frequent electrode reversal, so as to effectively reduce the contamination of the ion exchange membrane of the electrodialyzer 4, prolong the practical life of the ion exchange membrane and the electrodialyzer 4, and achieve a period of electrode reversal of 0.5h to 10 h.
As shown in fig. 4, an embodiment of the present invention further provides a method for manufacturing domestic weak alkaline water, comprising the steps of:
s100, running water flows into a primary filter element 6 through a water inlet of a machine body 1, the running water flows into a nanofiltration filter element 2 after being purified by the primary filter element 6, fresh water treated by the nanofiltration filter element 2 is divided into two paths, wherein one path of fresh water flows into a water storage tank 3 from a first water inlet 301, the other path of fresh water flows into a cathode chamber 402 of an electrodialyzer 4 through a fresh water chamber 401 of the electrodialyzer 4, alkaline water treated by the cathode chamber 402 of the electrodialyzer 4 flows out of the cathode chamber 402 of the electrodialyzer 4, then flows into a post-positioned filter element 7 for further purification treatment, and then flows out of a water outlet of the machine body 1;
s200, enabling concentrated water generated after the treatment of the nanofiltration filter element 2 to flow into a wastewater recovery barrel 8 through a wastewater port of the machine body 1;
s300, the concentrated water in the water storage tank 3 flows out of the first water outlet 303 under the action of the magnetic circulating pump 5 and flows into a concentrated water chamber 403 of the electrodialyzer 4, then flows into an anode chamber 404 of the electrodialyzer 4, the acidic water treated by the anode chamber 404 of the electrodialyzer 4 flows into the water storage tank 3 through the second water inlet 302, and flows into the wastewater recovery barrel 8 through the second water outlet 304 and the wastewater port of the machine body 1 in sequence.
In the embodiment, tap water is purified by the primary filter element 6 and the nanofiltration filter element 2 in sequence and then is subjected to hydrogen evolution treatment by the electrodialyzer 4 again, so that the produced water of the electrodialyzer 4 is alkalescent, mineral substances in the water are retained, the electrodialyzer is beneficial to human health, the requirement of healthy drinking water of people is met, the electrodialyzer is suitable for long-term drinking, and the alkalescent water treated by the electrodialyzer 4 is treated by the post-filter element 7 again, so that the taste is improved, and the drinking water quality of family members is improved; the water in the water storage tank 3 flows into the anode chamber 404 and the concentrated water chamber 403 of the electrodialyzer 4 and rapidly circulates in the water storage tank 3, liquid does not need to be additionally introduced into the electrodialyzer 4 to realize normal work of the electrodialyzer 4, a large amount of water resources are saved, the surface shearing force formed by the high-flow-rate water flow can effectively avoid scaling on the surface of the ion membrane of the electrodialyzer 4, the pollution of the ion exchange membrane is reduced, and the service life of the electrodialyzer 4 is effectively prolonged.
The following is an example:
the water quality indexes of the inlet water and the outlet water of the electrodialysis water purifier are shown in table 1, the tap water is filtered by PP cotton and an active carbon composite filter element and then enters a nanofiltration membrane to remove most of sulfate radicals in the water, the water pressure of the tap water is 0.2MPa, the water efficiency of the nanofiltration membrane is 95%, the purified water after most of the sulfate radicals are removed enters a fresh water chamber 401 and a water storage tank 3 of the electrodialysis water purifier, the working current density of an electrodialyzer 4 is 5A/m2, the water production flow is 0.6L/min, the water efficiency of the electrodialyzer 4 is 95%, the total water efficiency is 90%, the total solid salt content of the outlet water of the electrodialysis water purifier is 71ppm, the hardness is 62ppm, certain beneficial mineral substances such as calcium, magnesium and the like are reserved, the pH of the outlet water is 7.6, the outlet water is alkalescent water, and is beneficial for long-term drinking by a human body.
TABLE 1
The water quality indexes of the inlet water and the outlet water of the electrodialysis water purifier are shown in table 2, the tap water is filtered by PP cotton and an active carbon composite filter element and then enters a nanofiltration membrane to remove most of sulfate radicals and COD in the tap water, the tap water pressure is 0.2MPa, the recovery rate of the nanofiltration membrane is 90%, the outlet water of the nanofiltration membrane enters a fresh water chamber 401 and a water storage tank 3 of the electrodialysis water purifier, the working current density of an electrodialyzer 4 is 10A/m2, the outlet water flow is 0.8L/min, the water efficiency of the electrodialyzer 4 is 89%, the total water efficiency is 80%, the total solid salt content of the outlet water of the electrodialysis water purifier is 83ppm, the hardness is 53ppm, certain beneficial mineral substances are reserved, the pH of the outlet water is 7.4, and the outlet water is alkalescent water, so that the electrodialysis water purifier is beneficial for long-term drinking by a human body.
TABLE 2
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a produce water for alkalescent electrodialysis purifier which characterized in that includes: the device comprises a machine body, a nanofiltration filter element, a water storage tank and an electrodialyzer; the machine body is of a hollow structure, the nanofiltration filter element, the water storage tank and the electrodialyzer are all arranged in the machine body, the nanofiltration filter element, the water storage tank and the electrodialyzer are sequentially connected, and one end of the nanofiltration filter element is also connected with a fresh water chamber of the electrodialyzer;
the nanofiltration filter element comprises a filter bottle and a nanofiltration membrane; the nanofiltration membrane is arranged in the filter flask, and the water outlet end of the nanofiltration filter flask is respectively connected with the water storage tank and the electrodialyzer;
the water storage tank is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet; wherein the first water inlet is connected with the water outlet end of the nanofiltration filter flask, the second water inlet is connected with the anode chamber of the electrodialyzer, the first water outlet is connected with the concentrated water chamber of the electrodialyzer, and the second water outlet is connected with the wastewater outlet of the machine body;
concentrated water formed in the anode chamber of the electrodialyzer is replaced in sequence in batches, when the water yield recovery rate of the electrodialyzer reaches 70-80%, the concentrated water is discharged and replaced with new concentrated water, and the calcium carbonate scaling index of the concentrated water is not more than 1.3.
2. The water purifier capable of producing water with alkalescent electrodialysis according to claim 1, wherein the nanofiltration filter flask is further provided with a concentrated water discharge port, and the concentrated water discharge port is connected with a waste water port of the water purifier body.
3. The water purifier capable of producing water with weak alkaline electrodialysis according to claim 1, further comprising a magnetic circulation pump disposed at the first water outlet for facilitating water circulation between the electrodialyzer and the water storage tank.
4. The water purifier capable of producing water with alkalescent electrodialysis according to claim 1, further comprising a primary filter element, wherein one end of the primary filter element is connected with the water inlet of the water purifier body, and the other end of the primary filter element is connected with the nanofiltration filter element.
5. The water purifier capable of producing water with alkalescent electrodialysis according to claim 4, wherein the primary filter element is a PP cotton and activated carbon composite filter element.
6. The water purifier for alkalescent electrodialysis according to any one of claims 1-5, further comprising a post-filter element, wherein the water inlet end of the post-filter element is connected with the cathode chamber of the electrodialyzer, and the water outlet end of the post-filter element is connected with the water outlet of the machine body.
7. The water purifier capable of producing water according to any one of claims 1 to 5, further comprising a wastewater recovery tank connected to the wastewater outlet of the body via a pipeline, wherein the wastewater recovery tank is used for collecting wastewater generated during water purification.
8. The water purifier capable of producing water with weak alkaline electrodialysis according to any one of claims 1-5, further comprising a controller for controlling the electrodialyzer to perform polarity inversion.
9. A method of producing weakly alkaline water, the method comprising the steps of:
tap water flows into a primary filter element through a water inlet of a machine body, the tap water flows into a nanofiltration filter element after being purified by the primary filter element, fresh water treated by the nanofiltration filter element is divided into two paths, wherein one path of the fresh water flows into a water storage tank from a first water inlet, the other path of the fresh water flows into a cathode chamber of an electrodialyzer through a fresh water chamber of the electrodialyzer, alkaline water treated by the cathode chamber of the electrodialyzer flows out of the cathode chamber of the electrodialyzer, then flows into a post-filter element for further purification treatment, and then flows out of a water outlet of the machine body;
concentrated water generated after the nanofiltration filter element is treated flows into a wastewater recovery barrel through a wastewater port of the machine body;
the concentrated water in the water storage tank flows out from the first water outlet under the action of the magnetic circulating pump and flows into the concentrated water chamber of the electrodialyzer, then flows into the anode chamber of the electrodialyzer, and the acidic water treated by the anode chamber of the electrodialyzer flows into the water storage tank through the second water inlet and flows into the wastewater recovery barrel through the second water outlet and the wastewater port of the machine body in sequence.
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| CN104909503A (en) * | 2015-06-12 | 2015-09-16 | 南开大学 | Seawater desalination method for integrated membrane process |
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