WO2022225303A1 - Dispositif de traitement d'eau - Google Patents

Dispositif de traitement d'eau Download PDF

Info

Publication number
WO2022225303A1
WO2022225303A1 PCT/KR2022/005600 KR2022005600W WO2022225303A1 WO 2022225303 A1 WO2022225303 A1 WO 2022225303A1 KR 2022005600 W KR2022005600 W KR 2022005600W WO 2022225303 A1 WO2022225303 A1 WO 2022225303A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
treatment device
cdi module
cdi
water treatment
Prior art date
Application number
PCT/KR2022/005600
Other languages
English (en)
Inventor
Kiwon Yu
Jinhyun Lee
Hyungki Hong
Original Assignee
Lg Electronics Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Publication of WO2022225303A1 publication Critical patent/WO2022225303A1/fr

Links

Images

Classifications

    • 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
    • C02F1/4691—Capacitive deionisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/157—Flow control valves: Damping or calibrated passages
    • B01D35/1573—Flow control valves
    • 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
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • 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
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram

Definitions

  • the present disclosure relates to a water treatment device such as a water purifier.
  • a water treatment device for producing purified water by treating raw water such as a water purifier
  • a method that has recently been spotlighted is a deionization method, such as an EDI (electro-deionization), CEDI (continuous electro- deionization), or CDI (capacitive deionization) method.
  • EDI electro-deionization
  • CEDI continuous electro- deionization
  • CDI capactive deionization
  • the CDI method is a method of removing ions (contaminants) in water based on the mechanism whereby ions are adsorbed on and desorbed from the surface of an electrode by electrical force.
  • treatment water containing ions When treatment water containing ions is made to pass between electrodes (an anode and a cathode) while voltage is applied to the electrodes, anions and cations move to the anode and the cathode, respectively. That is, adsorption occurs. The ions in the treatment water can be removed through this adsorption.
  • the CDI method may be realized through repetition of an ion adsorption operation and an ion desorption operation.
  • adsorption amount desorption amount
  • adsorption amount > desorption amount so as the operation time increases, performance may gradually decrease.
  • CaCO 3 calcium carbonate
  • CO 3 2- carbonate
  • One technical task of the present disclosure is to provide a deionization-type water treatment device including a capacitive deionization (CDI) module that is capable of reducing deterioration in the performance of the CDI module.
  • CDI capacitive deionization
  • Another technical task of the present disclosure is to provide a water treatment device that is capable of decreasing the amount of calcium ions contained in raw water and thus reducing the production of calcium carbonate.
  • Another technical task of the present disclosure is to provide a water treatment device that is capable of preventing deterioration in the water purification ability of the CDI module.
  • the CDI module may operate while repeatedly perform an ion adsorption operation and an ion desorption operation.
  • adsorption amount desorption amount
  • adsorption amount > desorption amount so as the operation time increases, the performance may gradually decrease.
  • CaCO 3 calcium carbonate
  • CO 3 2- carbonate
  • a deionization-type water treatment device including a phosphate filter disposed in a water feed portion, the phosphate filter allowing phosphate ions to be discharged therethrough, a capacitive deionization (CDI) module, a first valve disposed between the phosphate filter and the CDI module, a bypass valve connecting the water feed portion to the CDI module while bypassing the phosphate filter, a second valve disposed in a water drainage portion of the CDI module, and a third valve disposed in a purified water discharge portion of the CDI module.
  • CDI capacitive deionization
  • the CDI module may perform an adsorption operation for adsorbing ions and a desorption operation for desorbing ions.
  • the phosphate filter may be connected to the CDI module through the first valve during the desorption operation performed by the CDI module.
  • the bypass valve may be opened during the adsorption operation performed by the CDI module.
  • the water treatment device may further include a controller configured to control at least one of the first to third valves and the bypass valve.
  • the controller may open the second valve during the desorption operation performed by the CDI module.
  • the controller may open the first valve and the second valve during water drainage of the CDI module.
  • the CDI module may include a plurality of electrode units including stacked plate-shaped electrodes.
  • Each of the electrodes may include a current collector and an activated carbon coating layer disposed on at least one surface of the current collector.
  • the phosphate filter may prevent formation of scale on the electrode of the CDI module.
  • the water treatment device may further include a pre-treatment filter connecting the water feed portion to the phosphate filter.
  • the water treatment device may further include a post-treatment filter connected to a downstream of the third valve.
  • a deionization-type water treatment device including a phosphate filter disposed in a water feed portion, the phosphate filter allowing phosphate ions to be discharged therethrough, a capacitive deionization (CDI) module operated by an adsorption operation for adsorbing ions and a desorption operation for desorbing ions, a first valve disposed between the phosphate filter and the CDI module, a bypass valve connecting the water feed portion to the CDI module while bypassing the phosphate filter, a second valve disposed in a water drainage portion of the CDI module, a third valve disposed in a purified water discharge portion of the CDI module, and a controller configured to control at least one of the first to third valves and the bypass valve.
  • CDI capacitive deionization
  • the controller may connect the phosphate filter to the CDI module through the first valve during the desorption operation performed by the CDI module.
  • a deionization-type water treatment device including a capacitive deionization (CDI) module is capable of reducing deterioration in the performance of the CDI module.
  • a water treatment device is capable of decreasing the amount of calcium ions contained in raw water and thus reducing the production of calcium carbonate in the process of supplying phosphate ions to bond the phosphate ions to calcium ions.
  • a water treatment device is capable of preventing a deterioration in the water purification ability of the CDI module by supplying phosphate ions only during the desorption operation performed by the CDI module.
  • FIG. 1 is a perspective view illustrating a water treatment device according to an embodiment of the present disclosure
  • FIG. 2 is a block diagram illustrating a water treatment device according to an embodiment of the present disclosure
  • FIG. 3 is a diagram illustrating a structure in which a phosphate filter is coupled to a water treatment device according to an embodiment of the present disclosure
  • FIG. 4 is a partially cut away perspective view illustrating a CDI module of a water treatment device according to an embodiment of the present disclosure
  • FIG. 5 is a cross-sectional view illustrating an electrode assembly of a filter for a water treatment device according to an embodiment of the present disclosure
  • FIG. 6 is a conceptual diagram illustrating the state in which water is purified through the CDI module shown in FIG. 5;
  • FIG. 7 is a conceptual diagram illustrating the state in which the water treatment device shown in FIG. 5 is regenerated
  • FIG. 8 is a flowchart illustrating a process of an adsorption operation performed by a water treatment device according to an embodiment of the present disclosure
  • FIG. 9 is a flowchart illustrating a process of a desorption operation performed by a water treatment device according to an embodiment of the present disclosure
  • FIG. 10 is a timing diagram illustrating a control state during an adsorption operation and a desorption operation performed by the water treatment device according to an embodiment of the present disclosure
  • FIG. 11 is a graph showing a change in the TDS removal rate of the water treatment device according to an embodiment of the present disclosure.
  • FIG. 12 is a graph showing a change in the flow rate of the purified water of the water treatment device according to an embodiment of the present disclosure.
  • FIG. 13 is a graph showing a change in the flow rate of discharged water of the water treatment device according to an embodiment of the present disclosure.
  • FIG. 1 is a perspective view illustrating a water treatment device according to an embodiment of the present disclosure.
  • the water treatment device may be any one of various water purification apparatuses, such as a water purifier or a water softener.
  • the water treatment device according to the present disclosure may be a water purifier mounted in a washing machine, a dishwasher, a refrigerator, or the like.
  • the water treatment device will be described as an example of a water purifier, but should not construed as limiting the scope of the present disclosure, and the water treatment device has various embodiments relating to electro-adsorption and discharge of ions contained in raw water fed from the outside.
  • the water treatment device is, for example, a water purifier.
  • the water purifier 10 may be configured to purify water directly supplied from an external water supply source and then to discharge the water outside.
  • the external appearance of the water purifier 10 may be defined by a combination of a plurality of panels. More specifically, the water purifier 10 may have an approximately hexahedral shape overall due to a combination of a front panel 11 forming a front exterior, side panels 12 forming both side exteriors, a top panel 13 forming a top exterior, a rear panel forming a rear exterior, and a base panel forming a bottom exterior. In addition, a plurality of parts for water purification may be mounted in the inner space formed by the combination of these panels.
  • the front panel 11 may include an operation display unit 14 configured to display the operation state of the water purifier 10 and to allow a user to input an operation command for the water purifier 10.
  • a water chute 15 configured to allow a user to manipulate discharge of purified water may be provided below the operation display unit 14.
  • the water chute 15 may be provided in order for the user to manipulate discharge of the purified water. Since the water chute 15 functions to open and close the water outlet in order for the user to discharge purified water, it may be referred to as an opening/closing device or an opening/closing nozzle.
  • the water chute 15 may be configured to discharge purified water, cold water, or hot water depending on the function of the water purifier 10 when operated by a user.
  • the water purifier 10 may include a filter for filtering foreign substances contained in the water supplied from the water supply source.
  • a filter may be provided in the form of a filter assembly.
  • the filter assembly may include a carbon filter. This filter will be described later.
  • FIG. 2 is a block diagram illustrating a water treatment device according to an embodiment of the present disclosure.
  • FIG. 3 is a diagram illustrating a structure in which a phosphate filter is coupled to a water treatment device according to an embodiment of the present disclosure.
  • the water treatment device is a deionization-type water treatment device.
  • Such a water treatment device broadly includes a phosphate filter 100 which is disposed in a water inlet portion (raw water feed portion) and through which phosphate ions are discharged, a capacitive deionization (CDI) module 200, and valves 110, 120, 130, and 140 connected to the phosphate filter 100 and the CDI module 200.
  • a phosphate filter 100 which is disposed in a water inlet portion (raw water feed portion) and through which phosphate ions are discharged
  • CDI capacitive deionization
  • phosphate ions PO 4 3-
  • the phosphate ions thus eluted generally react with calcium ions dissolved in raw water to form calcium phosphate (Ca 3 (PO 4 ) 2 ). This process is shown in Formula 1 and FIG. 3.
  • the phosphate filter 100 can prevent or reduce the formation of scale (CaCO 3 ) on the electrode of the CDI module 200. This will be described in detail later.
  • the CDI module 200 using a deionization method such as capacitive deionization (CDI) may operate while repeatedly performing an ion adsorption operation and an ion desorption operation.
  • a deionization method such as capacitive deionization (CDI)
  • Scale-inducing substances such as Ca 2+ or Mg 2+ ) contained in large amounts in raw water are fed into the CDI module 200, and discharged into the downstream of the CDI module 200 (at the side of the third valve 140) through an adsorption process (adsorption operation) for a certain period of time. Then, when upon adsorption to saturation, the adsorbed ions may be discharged to the downstream (at the side of the second valve 130) of the CDI module 200 through a desorption process (desorption operation).
  • adsorption process adsorption operation
  • the third valve 140 may be referred to as a water purification valve, and the second valve 130 may be referred to as a water drainage valve.
  • adsorption amount desorption amount
  • adsorption amount > desorption amount so as the operation time increases, performance may gradually decrease.
  • CaCO 3 calcium carbonate
  • CO 3 2- carbonate
  • the CDI module 200 may operate while repeatedly performing an ion adsorption operation and an ion desorption operation.
  • concentration of ions adsorbed to the electrode of the CDI module 200 is usually 2 to 3 times higher than the concentration of ions contained in raw water. Accordingly, the probability that scale is generated on the electrode of the CDI module 200 upon desorption of the high-concentration scale-inducing material adsorbed to the electrode of the CDI module 200 is higher than that upon adsorption thereof. If such adsorption and desorption processes are repeated, scale may be generated on the electrode of the CDI module 200, and thus the adsorption capacity of the electrode may be rapidly deteriorated.
  • the phosphate filter 100 may be controlled to be connected to the CDI module 200 when the concentrated water containing a high concentration of scale-inducing material is discharged due to desorption from the CDI module 200.
  • the phosphate filter 100 may be connected to the CDI module 200 only during the desorption operation performed by the CDI module 200.
  • the first valve 110 may be disposed between the phosphate filter 100 and the CDI module 200.
  • a bypass valve 120 configured to connect the water inlet to the CDI module 200 while bypassing the phosphate filter 100, may be disposed.
  • the second valve 130 may be disposed in the water drainage portion of the CDI module 200 and the third valve 140 may be disposed in the water discharge portion of the CDI module 200.
  • the second valve 130 may allow the drained water to be discharged to the water drainage portion during the desorption operation performed by the CDI module 200.
  • purified water may be discharged from the third valve 140 during the adsorption operation performed by the CDI module 200.
  • the first valve 110 disposed between the phosphate filter 100 and the CDI module 200
  • a bypass valve 120 configured to connect the water feed portion to which the raw water is supplied to the CDI module 200 while bypassing the phosphate filter 100
  • the second valve 130 disposed on the water drainage portion of the CDI module 200
  • the third valve 140 configured to control the amount of purified water discharged from the CDI module 200.
  • the phosphate filter 100 may be connected to the CDI module 200 through the first valve 110 during the desorption operation performed by the CDI module 200.
  • bypass valve 120 may be opened during the adsorption operation by the CDI module 200. Accordingly, during the adsorption operation by the CDI module 200, raw water may be fed into the CDI module 200 through the bypass valve 120 while bypassing through the phosphate filter 100.
  • a controller 300 configured to control at least one of the first to third valves 110, 130, and 140 and the bypass valve 120 may be provided. That is, at least one of the first to third valves 110, 130, 140 and the bypass valve 120 may be an electronically controlled valve that can be controlled by the controller 300 provided with an electronic device such as a microcomputer.
  • all of the first to third valves 110, 130 and 140 and the bypass valve 120 may be electronic valves that can be controlled by the controller 300.
  • the controller 300 may supply a constant voltage and a reverse voltage to the CDI module 200 to control the CDI module 200 to perform an adsorption operation and a desorption operation.
  • the controller 300 may control the first valve 110 such that the phosphate filter 100 is connected to the CDI module 200 during the desorption operation by the CDI module 200.
  • the controller 300 may open the bypass valve 120. Accordingly, during the adsorption operation by the CDI module 200, raw water may be fed into the CDI module 200 through the bypass valve 120 without passing through the phosphate filter 100.
  • the controller 300 may open the second valve 130 during the desorption operation by the CDI module 200. Accordingly, during the desorption operation by the CDI module 200, the water passing through the CDI module 200 may be drained through the second valve 130.
  • the controller 300 may open the first valve 110 and the second valve 130 when the CDI module 200 is drained.
  • the phosphate filter 100 can effectively prevent the formation of scale on the electrode of the CDI module 200.
  • a pre-treatment filter 400 may be provided between the water feed portion and the phosphate filter 100.
  • the pre-treatment filter 400 may be optionally provided.
  • the pre-treatment filter 400 may be provided when the embodiment of the present disclosure is implemented as a water purifier.
  • the pre-treatment filter 400 may include at least one of a sediment filter, a pre-treatment carbon filter (pre-carbon filter), a hollow fiber membrane filter (UF membrane filter), and a reverse osmosis (R/O) filter.
  • pre-carbon filter pre-treatment carbon filter
  • UF membrane filter hollow fiber membrane filter
  • R/O reverse osmosis
  • the sedimentation filter may be an initial stage filter that removes impurities such as rust, soil, sand, and dust.
  • the pre-treatment carbon filter may be a filter that adsorbs and removes compounds and odors using an adsorption method employing activated carbon.
  • the hollow fiber membrane filter may be a filter that filters out bacteria and contaminants and allows water containing minerals to pass therethrough.
  • the reverse osmosis filter is capable of removing impurities and minerals.
  • a post-treatment filter 410 connected to the downstream of the third valve 140 may be further provided.
  • the post-treatment filter 410 may be optionally provided.
  • the post-treatment filter 410 may be provided when the embodiment of the present disclosure is implemented as a water purifier.
  • the post-treatment filter 410 may include a post-treatment carbon filter (post-carbon).
  • the post-treatment carbon filter 410 may serve to prevent bacterial growth and to remove odors that have permeated the water.
  • FIG. 4 is a partially cut away perspective view illustrating a filter for a water treatment device according to an embodiment of the present disclosure.
  • the CDI module 200 may be a filter for a water treatment device for a deionization method such as capacitive deionization (CDI).
  • CDI capacitive deionization
  • the CDI module 200 includes a chamber 201 including a water inlet 260 through which water is supplied and a water outlet 270 through which water is discharged.
  • FIG. 4 illustrates a partial cutaway view of the internal configuration of the chamber 201.
  • An electrode assembly 205 that is disposed so as to come into contact with the feed water fed through the water inlet 260 and includes a plurality of electrode units may be provided in the chamber 201.
  • a power connector 290 configured to supply power may be connected to the electrode assembly 205.
  • One side of the electrode of the electrode assembly 205 may protrude from another side of the electrode assembly 205 so as to be connected thereto through the power connector 290.
  • the electrode assembly 205 may be accommodated in the inner area of the chamber 201, and water (feed water) may be fed to the inner area of the chamber 201 from outside through the water inlet 260.
  • the feed water may pass through the electrode assembly 205 and be discharged to the outside of the chamber 201 through the water outlet 270.
  • ions contained in water may be removed by being adsorbed on the electrode assembly 205 while passing through the electrode assembly 205.
  • the chamber 201 may have a cuboid shape, and may be divided into an upper portion 202 and a lower portion 203.
  • the chamber 201 may be provided so as to avoid water leakage.
  • an upper plate 204, a lower plate 206, a fastening means 280 such as a bolt configured to join the upper plate 204 to the lower plate 206, and a sealing member disposed therebetween may be provided.
  • the chamber 201 when the chamber 201 is divided into the upper portion 202 and the lower portion 203, the inner space of the chamber 201 is exposed to the outside, so a process of forming a stack of the electrode assembly 205 can be easily performed in the inner space.
  • the upper portion 202 and the lower portion 203 are separated from each other, so inspection and repair can be easily performed.
  • the feed water supplied into the chamber 201 through the water inlet 260 may be supplied to the side surface of the electrode assembly 205. In this process, the feed water may be uniformly supplied to the entire side surface of the electrode assembly 205.
  • ion exchange may be performed while water flows from the side surface of the electrode assembly 205 to the central portion thereof after uniform supply of water to the side surface of the electrode assembly 205. Then, the ion-exchanged water may be discharged to the outside through the water outlet 270 connected to the inside of the electrode assembly 205, for example, to the central portion thereof.
  • the water inlet 260 may be selectively connected to the first valve 110 and the bypass valve 120, and the water outlet 270 may be selectively connected to the second valve 130 in the water drainage portion and the third valve 140 in the water purification portion.
  • FIG. 5 is a cross-sectional view illustrating an electrode assembly of a filter for a water treatment device according to an embodiment of the present disclosure.
  • the electrode assembly 205 illustrates an example in which several electrode units 205a are stacked. Although two electrode units 205a are illustrated in FIG. 5, a larger number of electrode units may form the stack.
  • each electrode unit 205a includes a plurality of electrodes 210 forming a stack, a plurality of electrode means 220 connected to one end or the other end of each of the stacked electrodes 210, and a spacer 230 made of an insulating material disposed therebetween.
  • the electrode means 220 may have the same configuration as the power connector 290 described above.
  • the CDI module 200 may include a plurality of electrode units 205a including the stacked plate-shaped electrodes 210.
  • the electrode 210 may include a current collector 211 and an activated carbon coating layer 212 disposed on at least one surface of the current collector 211.
  • the electrode 210 may be formed by applying a mixture of activated carbon particles, conductive polymer particles, and a binder to the surface of the current collector 211.
  • the electrode unit 205a may be connected to a power supply 240 configured to supply current to the electrode 210 through the electrode means 220 such that adjacent two electrodes 210 alternately correspond to an anode (+) and a cathode (-), respectively.
  • the current collector 211 may be in the form of a thin film, and may be provided as an electric conductor.
  • the current collector 211 may include graphite foil, and in addition, various types of conductors may be adopted as the current collector 211.
  • the activated carbon coating layer 212 may be disposed on one or both surfaces of the current collector 211.
  • the activated carbon coating layer 212 may include activated carbon. Therefore, when impurities in raw water are adsorbed on the activated carbon coating layer 212 due to electrostatic attraction, the adsorbed impurities move through diffusion into pores called "macropores" in the surface of the activated carbon, and are then finally adsorbed in and then removed from mesopores or micropores therein.
  • the number of stacked electrodes may be varied depending on the required degree of hardness of water.
  • the spacer 230 may be disposed between the electrodes 210.
  • the spacer 230 can prevent a short circuit between the electrodes 210 while forming a gap between the electrodes 210.
  • raw water may be purified while passing through the spacer 230 between the electrodes 210.
  • the spacer 230 is made of a water-permeable insulator material, thus preventing a short circuit between the electrodes 210 and providing a flow path through which raw water being purified passes.
  • the spacer 230 may be made of a nylon material including a plurality of water flow paths.
  • the electrode means 220 may be provided as a pair thereof, and may be connected to one end or the other end of the plurality of stacked electrodes 210.
  • the electrode means 220 may be provided as an electric conductor.
  • the electrode means 220 may be formed of a copper (Cu) material.
  • the power supply 240 may apply a voltage in a range that prevents decomposition of raw water and allows ion adsorption.
  • the power supply 240 may apply a voltage of 1.5 V or less.
  • a positive or negative voltage may be applied to the electrode 220 based on the direction of the current supplied from the power supply 240.
  • the electrode means 220 may include a plurality of electrode means 220 disposed on both sides so as to be spaced apart from one another.
  • the electrode means 220 disposed on the right in the drawing when the electrode means 220 disposed on the right in the drawing is an anode (+), the electrode means 220 disposed on the left in the drawing may be a cathode (-). Conversely, when the electrode means 220 disposed on the right in the drawing is a cathode (-), the electrode means 220 disposed on the left in the drawing may be an anode (+).
  • the electrode means 220 in which an anode is formed is referred to as an "anode”
  • the electrode means 220 in which a cathode is formed is referred to as a "cathode”.
  • the stack of plurality of electrodes 210 may be alternately formed with another adjacent stack of plurality of electrodes 210 such that an anode and a cathode are alternately disposed.
  • adjacent means that the two electrodes 210 are adjacent to each other with the spacer 230 therebetween. That is, it can be seen that the electrode 210 disposed at the top of the drawing is adjacent to another electrode 210 with the spacer 230 interposed thereunder.
  • the anode and the cathode are respectively formed on the electrode means 220 disposed on both sides of the electrode 210, and the stack of electrodes 210 and another adjacent stack of electrodes 210 may be alternately connected to the anode and cathode, respectively.
  • the first electrode 210 disposed at the top of the drawing may be connected to the anode on the right and the second electrode 210 disposed thereunder may be connected to the cathode on the left.
  • the third electrode 210 disposed under the second electrode 210 may be connected to the anode on the right, and the fourth electrode 210 disposed under the third electrode 210 may be connected to the cathode on the left.
  • the electrode 210 connected to the anode is electrically isolated from the cathode and the electrode 210 connected to the cathode is electrically isolated from the anode.
  • the electrode 210 disposed at the top of the drawing may be connected to the cathode on the left, and the electrode 210 disposed thereunder may be connected to the anode on the right.
  • the electrode 210 disposed at the top of the drawing may be connected to the anode on the left and another electrode 210 disposed thereunder may be connected to the cathode on the right.
  • the electrode 210 disposed at the top of the drawing may be connected to the cathode on the right, and another electrode 210 disposed thereunder may be connected to the anode on the left.
  • the electrode 210 connected to the anode is electrically isolated from the cathode, and another electrode 210 connected to the cathode is electrically isolated from the anode.
  • the cathode may be spaced apart from the electrode 210 connected to the anode so that the electrode 210 connected to the anode is electrically isolated from the cathode, and the anode may be spaced apart from the electrode 210 connected to the cathode so that the electrode 210 connected to the cathode is electrically separated from the anode.
  • FIG. 6 is a conceptual diagram illustrating the state in which water is purified through the CDI module shown in FIG. 5, and FIG. 7 is a conceptual diagram illustrating the state in which the water treatment device shown in FIG. 5 is regenerated.
  • FIGS. 6 and 7 the operation of the filter for a water treatment device according to an embodiment of the present disclosure will be described.
  • the feed water can be purified.
  • anions (-) may be adsorbed onto the positively charged electrode 210 on the right side
  • cations (+) contained in the feed water may be adsorbed onto the negatively charged electrode 210 on the left side.
  • the feed water can easily pass between the electrodes 210 through the water-permeable spacer 230 disposed between the electrodes 210 to prevent a short circuit therebetween and secure a flow path.
  • the electrodes 210 can no longer adsorb ions, or the ion adsorption capability thereof is remarkably reduced.
  • methods for regenerating the electrodes 210 include a method of cutting off current supply and a method of causing current to flow in the direction opposite that of ion adsorption.
  • the power supply 310 supplies current in one direction and adsorbs ions onto the electrodes 210 to remove the ions from the water.
  • the power supply 240 supplies current in the direction opposite the direction above, and discharges the ions adsorbed on the electrodes 210 into the water to regenerate the electrodes 210.
  • the electrode 210 on the left in the drawing is charged to become a cathode, and the electrode 210 on the right in the drawing is charged to become an anode by changing the flow of current, as shown in FIG. 7.
  • the anions (-) adsorbed on the left electrode 210 in the water purification process are separated from the negatively charged left electrode 210, and the cations (+) adsorbed on the right electrode 210 in the water purification process are separated from the positively charged right electrode 210.
  • the ion removal ability of the electrode assembly 205 is regenerated, so the ion removal ability can be maintained constant.
  • FIG. 8 is a flowchart illustrating a process of an adsorption operation performed by a water treatment device according to an embodiment of the present disclosure.
  • FIG. 9 is a flowchart illustrating a process of a desorption operation performed by a water treatment device according to an embodiment of the present disclosure.
  • FIG. 10 is a timing diagram illustrating a control state during an adsorption operation and a desorption operation performed by the water treatment device according to an embodiment of the present disclosure.
  • the first valve 110 disposed between the phosphate filter 100 and the CDI module 200 is closed (off) and the bypass valve 120 is opened (on) (S10).
  • the output of the CDI module 200 is a positive voltage. That is, a positive voltage (constant voltage) having a magnitude of 1.5 V or less is applied to the electrode unit 220 of the CDI module 200 (S11).
  • purified water is discharged toward the third valve 140 disposed at the downstream of the CDI module 200 through an adsorption process (adsorption operation) for a predetermined period of time.
  • the second valve 130 corresponding to the water drainage valve, is closed (off), and the third valve 140, corresponding to the water purification valve, is opened (on) (S12).
  • the adsorption operation may be converted to a desorption operation and the adsorption operation may be terminated.
  • the first valve 110 disposed between the phosphate filter 100 and the CDI module 200, is opened (on), and the bypass valve 120 is closed (off) (S20).
  • phosphate ions PO 4 3-
  • phosphate ions PO 4 3-
  • the output of the CDI module 200 is a negative voltage. That is, a negative voltage (reverse voltage) having a magnitude of 1.5 V or less is applied to the electrode unit 220 of the CDI module 200 (S21).
  • the reverse voltage may be a voltage between 0 and -1.5 V.
  • the drained water is discharged toward the second valve 130 disposed at the downstream of the CDI module 200 through a desorption process (desorption operation) for a predetermined period of time.
  • the second valve 130 corresponding to the water drainage valve is opened (on), and the third valve 140 corresponding to the water purification valve is closed (off) (S22).
  • the desorption operation may be converted to an adsorption operation, and the desorption operation may be terminated.
  • the first valve 110 disposed between the phosphate filter 100 and the CDI module 200 is closed (off) and the bypass valve 120 is opened (on), so the supply of phosphate ions can be blocked and phosphate ions can be supplied through the phosphate filter 100 only during the desorption operation.
  • the supply of phosphate ions is cut off during the adsorption operation, and the phosphate ions are supplied only during the desorption operation, so the production of calcium carbonate is reduced and calcium ions are bonded to phosphate ions and then discharged, and thus the lifespan of the CDI module 200 can be prolonged.
  • the phosphate filter 200 by using the phosphate filter 200 only when the concentrated water is discharged from the CDI module 200, the lifespan of the electrode of the CDI module 200 can be effectively increased, and the water purification ability can be also improved.
  • FIG. 11 is a graph showing a change in the TDS removal rate of the water treatment device according to an embodiment of the present disclosure.
  • TDS total dissolved solids
  • Related Art 1 corresponds to the case where the phosphate filter 200 is not applied
  • Related Art 2 corresponds to the case where the phosphate filter 200 is simply applied without controlling the path of the phosphate filter 200.
  • the TDS removal rate is calculated as "1-(TDS of purified water / TDS of raw water) ⁇ 100(%)", and is a parameter indicating the water purification performance of the CDI module 200.
  • the automatic electrode cleaning function is periodically operated to temporarily increase the removal rate, so a sawtooth waveform may appear.
  • the TDS removal rate is superior when the embodiment of the present disclosure is applied, compared to the cases of Related Art 1 and Related Art 2.
  • the TDS removal rate of the embodiment of the present disclosure is greatly different from that of Related Art 2, in which the phosphate filter 200 is simply applied.
  • the TDS removal rate does not substantially decrease greatly over time.
  • FIG. 12 is a graph showing a change in the flow rate of the purified water in the water treatment device according to an embodiment of the present disclosure.
  • FIG. 13 is a graph showing a change in the flow rate of water discharged from the water treatment device according to an embodiment of the present disclosure.
  • Table 1 shows the change in the purified water flow rate and the change in the drained water flow rate of the water treatment device according to an embodiment of the present disclosure.
  • the numbers (1, 2, 3) on the horizontal axis indicate the number of days of operation of the water treatment device. That is, each characteristic is shown on the second day (2) and the third day (3) sequentially from the operation start date (1).
  • Related Art 1 corresponds to the case where the phosphate filter 200 is not applied
  • Related Art 2 corresponds to the case where the phosphate filter 200 is simply applied without controlling the path of the phosphate filter 200.
  • the change in the purified water flow rate is slightly increased on the second day, and no change occurs on the third day compared to the second day. That is, it can be seen that the change in the purified water flow rate is relatively small.
  • phosphate ions are fed from the phosphate filter 100 during the desorption operation performed by the CDI module 200 to suppress the production of scale.
  • the width of the flow path is narrowed, so the flow rate is reduced.
  • the flow rate change characteristics are also excellent.
  • a water treatment device such as a water purifier is provided.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Geology (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

L'invention concerne un dispositif de traitement d'eau tel qu'un purificateur d'eau. L'invention concerne un dispositif de traitement d'eau du type à déionisation comprenant un filtre à phosphate disposé dans une partie d'alimentation en eau, le filtre à phosphate permettant à des ions phosphate d'être évacués à travers ce dernier, un module de déionisation capacitive (CDI) , une première vanne disposée entre le filtre à phosphate et le module CDI, une vanne de dérivation reliant la partie d'alimentation en eau au module CDI tout en contournant le filtre à phosphate, une deuxième vanne disposée dans une partie de drainage d'eau du module CDI, et une troisième vanne disposée dans une partie d'évacuation d'eau purifiée du module CDI.
PCT/KR2022/005600 2021-04-23 2022-04-19 Dispositif de traitement d'eau WO2022225303A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2021-0052964 2021-04-23
KR1020210052964A KR20220146101A (ko) 2021-04-23 2021-04-23 수 처리 장치

Publications (1)

Publication Number Publication Date
WO2022225303A1 true WO2022225303A1 (fr) 2022-10-27

Family

ID=83722550

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2022/005600 WO2022225303A1 (fr) 2021-04-23 2022-04-19 Dispositif de traitement d'eau

Country Status (2)

Country Link
KR (2) KR20220146101A (fr)
WO (1) WO2022225303A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011069572A (ja) * 2009-09-28 2011-04-07 Sanden Corp 給湯システム
JP2017121612A (ja) * 2016-01-08 2017-07-13 パナソニックＩｐマネジメント株式会社 電気化学セル、それを備える水処理装置、及び水処理装置の運転方法
KR20170135843A (ko) * 2015-03-27 2017-12-08 에코워터 시스템즈 엘엘씨 수처리 시스템용 저장과 전달 및 그 사용 방법
KR101977841B1 (ko) * 2012-08-20 2019-05-13 삼성전자주식회사 연수장치
KR20200129276A (ko) * 2019-05-08 2020-11-18 최현성 카본 전극 필터를 포함하는 가정용 정수기 및 정수기 제어 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011069572A (ja) * 2009-09-28 2011-04-07 Sanden Corp 給湯システム
KR101977841B1 (ko) * 2012-08-20 2019-05-13 삼성전자주식회사 연수장치
KR20170135843A (ko) * 2015-03-27 2017-12-08 에코워터 시스템즈 엘엘씨 수처리 시스템용 저장과 전달 및 그 사용 방법
JP2017121612A (ja) * 2016-01-08 2017-07-13 パナソニックＩｐマネジメント株式会社 電気化学セル、それを備える水処理装置、及び水処理装置の運転方法
KR20200129276A (ko) * 2019-05-08 2020-11-18 최현성 카본 전극 필터를 포함하는 가정용 정수기 및 정수기 제어 방법

Also Published As

Publication number Publication date
KR20220146101A (ko) 2022-11-01
KR20240078613A (ko) 2024-06-04

Similar Documents

Publication Publication Date Title
WO2012161534A2 (fr) Appareil et procédé de régulation des solides dissous totaux, et appareil de traitement de l'eau le contenant
WO2018124752A1 (fr) Filtre d'appareil de traitement d'eau et appareil de traitement d'eau le comprenant
WO2012091500A2 (fr) Appareil de traitement de l'eau et procédé de traitement de l'eau utilisant celui-ci
WO2018106061A1 (fr) Module de filtre pour appareil de traitement d'eau, et appareil de traitement d'eau comprenant ledit module de filtre
WO2012118329A2 (fr) Appareil d'humidification utilisant un photo-catalyseur ayant une fonction d'assainissement d'air
WO2019146891A1 (fr) Filtre pour appareil de traitement d'eau et appareil de traitement d'eau le comprenant
WO2011090261A2 (fr) Filtre complexe et purificateur d'eau doté d'un filtre complexe
WO2020175743A1 (fr) Appareil de régénération continue de charbon actif utilisant une mise sous pression hydrothermale, ayant une structure reliée à un filtre, et procédé de régénération continue de charbon actif utilisant celui-ci
WO2022225303A1 (fr) Dispositif de traitement d'eau
WO2014190876A1 (fr) Dispositif et procédé de traitement d'eaux usées provenant de la production de feuilles reconstituées de tabac
WO2013059980A1 (fr) Procédé de dépôt chimique de nickel et d'or sur une carte de circuit imprimé
WO2018048087A1 (fr) Dispositif de séparation de particules fines
WO2021033918A1 (fr) Filtre pour dispositif de traitement de l'eau
WO2018124643A1 (fr) Dispositif de fabrication d'eau hydrogénée
WO2019117532A2 (fr) Appareil de production d'énergie hybride à gradient de salinité/énergie solaire et système de dessalement l'utilisant
WO2019088782A1 (fr) Appareil de génération d'énergie hybride et procédé permettant de produire simultanément de l'électricité et de la déionisation
WO2021006584A1 (fr) Filtre pour dispositif de traitement de l'eau
WO2022231196A1 (fr) Filtre pour dispositif de traitement de l'eau
WO2019017747A1 (fr) Appareil de dessalement d'eau de mer
WO2018155972A2 (fr) Feuille de cuivre ayant une excellente résistance d'adhésion, électrode l'intégrant, batterie secondaire l'intégrant et procédé de fabrication associé
WO2015088278A1 (fr) Dispositif d'adoucissement de l'eau et procédé de régénération de résine échangeuse d'ions
WO2020213836A1 (fr) Anneau de bord en sic
WO2020105921A1 (fr) Trousse d'élimination d'ions
WO2021235688A1 (fr) Filtre pour purificateur d'eau et purificateur d'eau le comprenant
WO2021172619A1 (fr) Absorbeur de fluor, son procédé de préparation, et procédé de traitement d'eaux usées contenant du fluor à l'aide de celui-ci

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22792003

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22792003

Country of ref document: EP

Kind code of ref document: A1