KR100901857B1 - Electrodialysis water softner - Google Patents

Abstract

An electrodialysis water softener having very simple electrode structure is provided to offer inexpensive manufacture and maintenance cost and to offer superior performance and usability. An electrodialysis water softener includes a first case(100), a second case(200), a first electrode plate(410), a second electrode plate(420), a raw water treatment filter(300), an electrode spacer layers(350), and an ion collecting films(360). The first case includes a first electrode plate groove(110), a first inlet(140), a first inflow passage(141), a first outlet(150), a first outlet passage(151), a first small inlet(120), a first small inlet passage, a first small outlet(130), and a first small outlet passage(131). The second case includes a second electrode plate groove, a second inlet(240), a second inlet passage, a second outlet(250), a second outlet passage, a second small inlet(220), a second small inlet passage, a second small outlet(230), and a second small outlet passage.

Description

Electric dialysis water softener {ELECTRODIALYSIS WATER SOFTNER}

The present invention relates to an electrodialysis softener, and more particularly, to an electrodialysis softener capable of converting water into soft water by applying power.

Generally, when a lot of hardness-inducing substance (total dissolved solids) is dissolved in water, it is called hard water or hard water. Hardness-inducing substances are typically calcium ions (Ca ²⁺ ) and magnesium ions (Mg ^{2 +} ), and are contained in groundwater.

The water softener refers to a device that makes hard water soft by absorbing and removing various ionic components, such as hardness-inducing substances, contained in such water from a cation exchange resin.

A conventional water softener is schematically composed of a housing having an inlet and an outlet, and an ion exchange resin inside the housing. The operation of the water softener is caused by the inflow of water before the water treatment (hereinafter referred to as 'raw water') from the water inlet through the ion exchange resin, and the hardness-inducing substance is removed from the ion exchange resin. Is switched.

However, since the ion exchange resin used for a long time loses its function by replacing all the hardness-inducing substances, the ion exchange resin must be regenerated after a certain amount of treatment.

1 is a configuration diagram of a water softener according to the prior art, and includes a housing 10, an ion exchange unit 20, a pair of electrode plates 30 and 31, a valve 40 and 41, a pump 60, and the like. .

The housing 10 has a water inlet 61 connected to the raw water pipe 50 and a water outlet 62 connected to the water outlet pipe 51, respectively, and has a hollow inside. The ion exchange unit 20 is a pair of ion exchange membrane 21 filled with a predetermined ion exchange resin 23 to generate soft water with water introduced through the inlet 61 of the housing 10 and discharge it to the outlet 62. , 22 is provided in the longitudinal direction of the housing (10). The ion exchange unit 20 has a first ion exchange membrane 21 and a second ion exchange membrane 22 having fine pores formed therebetween, and an ion exchange resin (B) between the first ion exchange membrane 21 and the second ion exchange membrane 22. 23) is filled.

The electrode plates 30 and 31 are composed of the positive electrode plate 30 and the negative electrode plate 31. A first concentration channel 24 is formed between the positive electrode plate 30 and the first ion exchange membrane 21 of the ion exchange unit 20, and the second ion of the negative electrode plate 31 and the ion exchange unit 20 is formed. A second condensation passage 25 is formed between the exchange membranes 22. The first concentrated hydrogen passage 24 is connected to the first concentrated water pipe 53, and the second concentrated hydrogen passage 25 is connected to the second concentrated water pipe 54. When the power source 32 is applied to the electrode plates 30 and 31, the negative electrode plate 31 draws cationic impurities from the ion exchange resin 23 in the ion exchange unit 20 and the positive electrode plate 30. ) Draws anionic impurities from the ion exchange resin 23 in the ion exchange unit 20.

That is, in concentrated water containing impurities such as metal ions accumulated on the surface of the ion exchange resin 23, the acidic component passes through the first ion exchange membrane 21 and is collected in the first concentration passage 24, and impurities In the concentrated water contained, the alkali component passes through the second ion exchange membrane 22 and is collected in the second concentrated water passage 25.

The concentrated water collected in the first condensation passage 24 and the second condensation passage 25 are discharged to the outside through the first condensation pipe 53 and the second condensation pipe 54.

On the other hand, the valve 40, 41 is composed of a raw water valve 40 provided in the raw water pipe 50 and the withdrawal valve 41 provided in the water discharge pipe 51. The raw water valve 40 communicates or blocks the raw water flowing into the water inlet 61 through the raw water pipe 50, and the water outlet valve 41 receives the soft water that is discharged to the water outlet 62 through the water outlet pipe 51. To communicate or block. The shutoff operation of the raw water valve 40 and the discharge valve 41 is performed during the regeneration operation of the present invention, that is, when power is applied to the electrode plates 30 and 31 to remove impurities from the ion exchange resin 23. Is done.

On the other hand, the opening operation of the raw water valve 40 and the outlet valve 41 is made when the soft water is generated through the ion exchange unit 20.

In addition, the pump 60 is connected to the raw water pipe 50 and the discharge pipe 51 is provided on the outside of the housing 10. When the pump 60 blocks the inflow of the raw water and the outflow of the soft water by the raw water valve 40 and the water discharge valve 41, the pump 60 continuously circulates the water in the ion exchange unit 20 for a predetermined time.

In an embodiment, the pump 60 has one side connected to the raw water pipe 50 between the raw water valve 40 and the inlet 61 of the housing 10 by a connecting pipe 52 and the other side of the pump 60 and the housing. (10) is connected to the outlet pipe 51 between the outlet port 62 of the connection pipe 52.

The water softener according to the prior art is an operation for generating soft water, and the raw water is introduced into the ion exchange unit 20 in the housing 10 along the raw water pipe 50 through the open raw water valve 40. The raw water introduced in this way is removed by the ion exchange resin 23 in the ion exchange unit 20, the hardness components such as calcium ions and magnesium ions are removed and is produced as soft water. The soft water generated in the ion exchange unit 20 is directly provided to the users via the water outlet valve 41 along the water outlet pipe 51.

In addition, as a regeneration operation of the water softener according to the prior art, the raw water valve 40 is closed so that the supply of raw water is blocked, and the water discharge valve 41 is also blocked so that the soft water generated in the ion exchange unit 20 does not flow out. . When the raw water pipe 50 and the water discharge pipe 51 are respectively blocked by the valves 40 and 41, the power supply 32 is applied to the positive electrode plate 30 and the negative electrode plate 31, and the pump 60 As a result, water staying in the ion exchange unit 20 is continuously circulated.

When power is applied to the positive electrode plate 30 and the negative electrode plate 31, the concentrated water is discharged from the ion exchange unit 20 into the first concentrated hydrogen passage 24 and the second concentrated hydrogen passage 25, and the first The concentrated water discharged into the concentrated hydrogen passage 24 and the second concentrated hydrogen passage 25 is discharged to the outside through the first concentrated water pipe 53 and the second concentrated water pipe 54.

After a predetermined time passes through this process, the operation of the pump 60 is stopped, the power applied to the positive electrode plate 30 and the negative electrode plate 31 is cut off, and the raw water valve 40 and the discharge valve 41 ) Is opened and the training operation is performed again.

However, the water softener according to the prior art is inconvenient to replace the entire ion resin when the ion exchange resin capacity is reduced after a certain time. In addition, the water softener according to the prior art needs a large internal space because the ion exchange resin 23 has to be filled with a predetermined capacity therein, and a pump must be provided for the regeneration operation, which limits the size of the water softener. Therefore, it is not suitable to implement a compact and lightweight water softener.

The present invention devised to solve the above problems is an object of the present invention to provide an electrodialysis water softener which is smaller than the soft water treatment performance.

Another object of the present invention is to provide an electrodialysis water softener that can semi-permanently use a filter for filtering impurities.

It is another object of the present invention to provide an electrodialysis water softener having a very simple structure by using only two electrodes.

In addition, the present invention has another object to provide an electrodialysis water softener with high water softening performance and low power consumption by applying a square wave voltage.

It is another object of the present invention to provide an electrodialysis water softener that can be simply regenerated by reversing the electrodes.

Electrodialysis water softener according to the present invention, the first case; Second case; A raw water treatment filter disposed between the first case and the second case; A first electrode plate disposed between the first case and the raw water treatment filter; And a second electrode plate disposed between the second case and the raw water treatment filter, wherein the first case and / or the second case includes an inlet passage for supplying raw water to the raw water treatment filter; The first case and / or the second case includes at least one or more soft water discharge passages for discharging soft water from the raw water treatment filter, and the first case and / or the second case are the raw water treatment. At least one concentrated water outlet for discharging the concentrated water from the filter, wherein the first and second cases securely hold the raw water treatment filter and switch the electrodes applied to the first and second electrode plates. It is possible to perform the training operation and the regeneration operation.

According to the electrodialysis water softener of the present invention, since the ion collection in the softening process and the ion discharge in the regenerating process are made by the electric force, the softening performance and the regenerating performance are excellent.

In addition, by applying the square wave voltage in the training and regeneration process, the soft and regeneration performance is excellent, and the power consumption is low, so the maintenance cost is low.

In addition, compared to the case where the electrodes are installed in each layer by using only two electrodes, there is no need for waterproofing and insulating means for preventing the short circuit between the layers, and the structure is extremely simple, which makes the manufacturing very easy and maintenance. Easy to manufacture and low cost to manufacture and maintain

In addition, since the soft water filter is formed by stacking raw water filters, partial replacement of the filter is very easy, maintenance costs are low, and it is very easy to manufacture a filter having a size and a shape according to the required performance.

In addition, since the contact area between the ion exchange part and the raw water is very large, the ion exchange, that is, the water softening performance and the regeneration performance are excellent.

In addition, it is easy to implement a compact and lightweight product because it does not require additional physical components for the regeneration operation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Figure 2 is a block diagram of an electrodialysis water softener according to an embodiment of the present invention.

Electrodialysis water softener according to an embodiment of the present invention, the first case 100, the second case 200, the first electrode plate 410, the second electrode plate 420, the first and the first facing each other It comprises a raw water treatment filter 300, an electrode spacer layer 350, and an ion collecting membrane 360, located between the two cases (100, 200),

The raw water treatment filter 300 includes an ion collecting layer 310, a cation exchange layer 320, a spacer layer 330, and an anion exchange layer 340.

3A and 3B are configuration diagrams of the first and second cases 100 and 200 according to an embodiment of the present invention, and the first case 100 includes a first electrode plate groove 110 and a first inlet ( 140, the first inlet 141, the first outlet 150, the first outlet 151, the first quench 120, the first quench 121, the first outlet 130 , And the first water discharge passage 131.

The first electrode plate groove 110 overlaps with each other so that the first electrode plate 410 and the ion trapping membrane 360 may be inserted and positioned on a surface where the first case 100 is in contact with the raw water treatment filter 300. The first electrode plate 410 and the ion trapping membrane 360 are configured to be recessed in dimensions corresponding to the shape and thickness.

Two first inlet 141 is formed on the lower side of the surface where the raw water treatment filter 300 of the first case 100 is located, the first inlet 140 is configured on one side of the first case 100 Hydrodynamically connected with.

Two first water outlets 151 are formed on an upper side of a surface on which the raw water treatment filter 300 of the first case 100 is located, and the first water outlet 150 configured at one side of the first case 100. Hydrodynamically connected with.

Four first quenching channel 121 is formed in the lower portion of the first case 100, the first electrode plate groove 110, and the first scavenging opening 120 is formed on one side of the first case 100 and Hydrodynamically connected, four first discharge passage 131 is configured in the upper portion in the first case 100, the first electrode plate groove 110, the first configured on one side of the first case 100 It is hydrodynamically connected to the outlet port 130.

FIG. 3B is a configuration diagram of the second case 200 viewed from the direction A in FIG. 3A, and the second case 200 includes the second electrode plate groove 210, the second inlet 240, and the second inlet 241. ), The second outlet 250, the second outlet 251, the second quench 220, the second quench 221, the second outlet 230, and the second outlet 231 ).

Two second inlet 241 is formed on the lower side of the surface where the raw water treatment filter 300 of the second case 200 is located, the second inlet 240 formed on one side of the second case 200. Hydrodynamically connected with.

Two second water outlets 251 are formed on the upper side of the surface on which the raw water treatment filter 300 of the second case 200 is located, and the second water outlet 250 configured on one side of the second case 200 is provided. Hydrodynamically connected with.

In addition, the first inlet 141 and the second inlet 241 are respectively configured in the first case 100 and the second case 200 in a staggered position so as not to face each other, similarly to the first outlet ( 151 and the second water outlet 251 is also composed of a staggered position.

On the other hand, the configuration of the second electrode plate groove portion 210, the second squeezed water inlet 220, the second squeezed water channel 221, the second squeezed water outlet 230, and the second squirted water channel 231 are the first The structure of the first electrode plate groove part 110, the first quenching opening 120, the first quenching channel 121, the first quenching opening 130, and the first quenching channel 131 of the case 100. Is almost the same as

4 is a structural diagram showing a laminated structure of the raw water treatment filter 300 according to an embodiment of the present invention, the raw water treatment filter 300, the ion trap layer 310, which can collect positive and negative ions, is introduced A cation exchange layer 320 for passing only cations in raw water, a spacer layer 330 for providing a space for the incoming raw water to pass through, an anion exchange layer 340 for passing only anions in the incoming raw water, and an ion collecting layer It is laminated | stacked in the order of 310, and is comprised.

Each of the layers 310, 320, 330, and 340 has four inlets corresponding to the positions of the first inlet 141 of the first case 100 and the second inlet 241 of the second case 200. A ball is formed and four water outlets are formed corresponding to the positions of two first water outlets 151 of the first case 100 and two second water outlets 251 of the second case 200.

The cation exchange layer 320 only passes the cation but does not pass the anion, and the anion exchange layer 340 only passes the anion but does not pass the cation. In addition, the spacer layer 330 supports the space between the cation exchange layer 320 and the anion exchange layer 340 to create a space for water to flow.

FIG. 5 is a front view illustrating a structure of the spacer layer 330 according to an embodiment of the present invention, and two first spacer layer acquisition holes are provided at positions corresponding to the first inlet 141 of the first case 100. 331 is formed, and two second spacer layer inlets 332 are formed at positions corresponding to the second inlets 241 of the second case 200. In addition, at the other side of the spacer layer 330, two second spacer layer outlet holes 334 are formed at positions corresponding to the first outlet path 151 of the first case 100 and the second case 200. Two first spacer layer outlet holes 333 are formed at positions corresponding to the second outlet passage 251. The inner space of the spacer layer 330 is provided with a cut-out, where the two first spacer layer inlet 331 and the two first spacer layer outlets 333 are configured to communicate with each other by the cut-out space. . The mesh 335 is formed in the cut-out space, and the placement angle of the mesh may be any, but the direction of the line crossing in the mesh 335 is the first spacer layer water extraction hole 333 at the side of the first spacer layer inlet 331. It is preferably disposed to form an angle of approximately 45 ° with the direction toward the side, wherein the raw water from the first spacer layer inlet 331 to the first spacer layer outlet 333 at the angle is the spacer layer 330 It flows most evenly at, and the flow rate is high, so the water softening efficiency is good.

The ion trap layer 310 collects positive ions passing through the cation exchange layer 320 and negative ions passing through the anion exchange layer 340 from the spacer layer 330. The structure of the ion trapping layer 310 is basically similar to that of the spacer layer 330, and a carbon film 315 is formed in the cut space instead of the mesh 335, and the first ion collecting layer is obtained from the cut space. A flow path communicating with the hole 311 and the first ion collecting layer discharge hole 313 is formed to be narrower so that the fluid flow is smaller than that of the spacer layer 330. In addition, the ion trapping amount may be adjusted by controlling the amount of fluid flowing by adjusting the width of the flow path communicating with the first ion trapping layer inlet 311 and the first ion trapping layer outlet 313 from the cut-out space. . The reason why the fluid flow is possible in the carbon film 315 of the ion collecting layer 310 is that when a small amount of water flows through the carbon film 315, the ion collecting efficiency is greatly increased.

The spacer layer 330 is arranged upside down as opposed to the ion trap layer 310, so that the spacer layer 330 and the ion trap layer 310 are hydrodynamically disconnected from each other. That is, the first and second ion collection layer acquisition holes 311 and 312 and the first and second spacer layer acquisition holes 331 and 332 communicate with each other, and the first and second ion collection layer extraction holes 313 and 314 and the first and second spacer layer discharge holes 333 and 334 communicate with each other, but obtain a first ion trap layer acquisition hole 311 communicating with the carbon film 315 and a first spacer layer communicating with the mesh 335. The holes 331 are staggered with each other, and the first ion trapping layer outlet hole 313 communicating with the carbon film 315 and the first spacer layer outlet hole 333 communicating with the mesh 335 are also positioned to alternate with each other. Accordingly, the spacer layer 330 and the ion trap layer 310 have different fluid flow paths.

The first and second electrode plates 410 and 420 having opposite polarities are respectively formed in the first electrode plate groove part 110 of the first case 100 and the second electrode plate groove part 210 of the second case 200. It is composed. The first electrode plate 410 and the second electrode plate 420 are supplied with power from a power supply device outside the first and second cases 100 and 200, so that one is a (+) electrode and the other is a (−) electrode. When the electrode is formed, the polarity is reversed when switching from the softening operation to the regeneration operation. At this time, a square wave voltage is applied, which further increases ion collection and regeneration efficiency, thereby reducing power consumption. This is because it can give a stronger impact on and off than sine wave. On the other hand, although not shown, the polarity switching and the square wave voltage applying means of the power supplied from the power supply are only well known conventional techniques and thus will be omitted.

The ion collecting film 360 is inserted into the first electrode plate groove part 110 and the second electrode plate groove part 210 in contact with the first electrode plate 410 and the second electrode plate 420, respectively. The electrode spacer layer 350 is positioned in contact with the ion collection membrane 360, respectively, between the second case 200 and the raw water treatment filter 300. The electrode spacer layer 350 is only disconnected from a space in which both the electrode spacer layer inlet 351 and the electrode spacer layer outlet 352 are cut, and the rest of the structure is substantially the same as that of the spacer layer 330. This is for flowing general water so that current flows easily between the first and second electrode plates 410 and 420 and the raw water treatment filter 300. The first quenching channel 121 and the second quenching channel ( The common water flowing from the 221 may be formed around the first electrode plate 410, around the second electrode plate 420, and through the electrode spacer layer 350, respectively. And flows to 231.

In addition, although not shown in the drawing, it is preferable to form a plurality of fixing holes in the first and second cases 100 and 200, the raw water treatment filter 300, and the electrode spacer layer 350 and fix them using bolts and nuts. In addition, as long as the first and second cases 100 and 200, the raw water treatment filter 300, and the electrode spacer layer 350 can be firmly fixed, any fixing means and method may be used.

Figure 6 is a flow chart showing the flow path of the raw water, general water and concentrated water in the electrodialysis softener according to an embodiment of the present invention, the training process and principle are as follows.

Raw water that is subject to softening is supplied to the first water inlet 140 of the first case 100. The raw water flowing into the first water inlet 140 passes through the first water inlet 141 and flows through the water inlet of the raw water treatment filter 300, wherein the raw water is introduced into the mesh 335 of the spacer layer 330. Through the two flowable first spacer layer inlet 331, the net 335 is changed to soft water having a very low ion concentration, and the net 335 and two flowable first spacer layer outlets 333 are also formed. It flows through, and is discharged through the second water outlet 251 of the second case 200 to the second water outlet 250.

General water is supplied to the second water inlet 240 of the second case 200. The general water flowing into the second water inlet 240 passes through the second water inlet 241 and flows through the water inlet of the raw water treatment filter 300. At this time, the general water flowing into the carbon membrane of the ion collecting layer 310 315) and two flowable first ion collection layers through the carbon membrane 315 through the inlet hole 311 to the concentrated water having a very high ion concentration, and also the carbon membrane 315 and two flowable first ion collection layers The water flows through the water outlet 313 and passes through the first water outlet 151 of the first case 100 to the first water outlet 150.

General water is supplied to the first scavenging opening 120 of the first case 100 and the second scavenging opening 220 of the second case 200. The general water supplied to the first quenching port 120 flows through the first quenching channel 121 and flows through the first electrode 410, the ion collection membrane 360, and the electrode spacer layer 350, and the first effluent water. Discharged through the furnace 131 and the first discharge port 130. The general water supplied to the second quenching port 220 flows through the second quenching channel 221 and flows through the second electrode 420, the ion collecting membrane 360, and the electrode spacer layer 350, and the second effluent water. Discharged through the furnace 231 and the second discharge port (230).

In the training process, in order to collect ions, the first electrode plate 410 of the first case 100 has a negative polarity, and the second electrode plate 420 of the second case 200 has a positive polarity. Power is applied to make it stand out. Therefore, the negative ions in the raw water, such as (Cl ⁻ ), are collected in the ion collecting layer 310 by passing through the anion exchange layer 340 by the electric suction force, and the positive ions in the raw water, for example (Ca ²⁺ , Mg). ^{2 +} , Na ⁺ ) is collected through the cation exchange layer 320 in the ion trap layer 310. Through this process, various ionic components contained in raw water passing through the spacer layer 330 are removed and converted into soft water. Meanwhile, the concentrated water discharged through the first outlet 150 and the water having high ion concentration discharged through the first and second outlets 130 and 230 may be discarded or may be controlled by a valve or the like, although not shown in the drawing. It may be mixed again with the raw water obtained through the means and subjected to the training process again.

However, the electrodialysis water softener according to an embodiment of the present invention has a high water softening efficiency at the initial stage of use, similar to a general water softener, and as the amount of ions collected in the ion trap layer 310 increases, the soft water efficiency decreases. There is a need for a regeneration process to remove from the ion trap layer 310.

The regeneration process and principle are as follows.

The first inlet 141 supplies general water having a high ion concentration, and the general water contacts the anion exchange layer 340 and the cation exchange layer 320 while passing through the spacer layer 330. The first electrode plate 410 has a (+) polarity and the second electrode plate 420 has a (-) polarity. Therefore, anions (Cl ⁻ ) and cations (Ca ²⁺ , Mg ²⁺ , Na ⁺ ) captured in the ion trap layer 310 by electrical repulsive force are separated from the ion trap layer 310, respectively, and anion exchange layer. 340 and the cation exchange layer 320 is mixed with the general water. At this time, since the anion exchange layer 340 passes only the anion and the cation exchange layer 320 passes only the cation, ions separated from the ion trap layer 310 are discharged without being collected.

On the other hand, although not shown in the figure, switching of the polarity for the regeneration operation can be performed when the measured value of the concentrated water or soft water through the TDS meter reaches a predetermined reference value. For example, when the ion concentration of the soft water discharged to the first outlet 150 exceeds 70 ppm, polarity switching is performed. In addition, by configuring the automatic control unit and interlocked with the TDS meter, and automatically controlled according to the concentration of ions of the concentrate, the concentrated water may be mixed with the raw water to undergo a re-softening process, or discharged and disposed.

In addition, the number and location of incoming and outgoing holes formed in each layer constituting a set of raw water treatment filters 300, and the shape of each layer, depending on the required soft water throughput, processing speed, processing performance, water softener size, and the like. And size, and the number of layers to be stacked may be different, and a plurality of sets of raw water treatment filters 300 may be stacked. In addition, only the desired floor may be replaced or repaired during the replacement or maintenance of the floor.

In addition, the first inlet 141, the first outlet 151, the first quench 121, the first outlet 131, the second inlet 241, the second outlet 251 ), The second scavenging duct 221 and the second scavenging duct 231 may be located anywhere in the first and second cases 100 and 200 if a smooth fluid flow is possible in the raw water treatment filter 300. However, when the fluid flows from the direction of gravity to the direction opposite to gravity in the spacer layer 330 and the ion trapping layer 310, the fluid may be evenly distributed and flowed in each layer, where the softening efficiency is further increased. Can be high. Accordingly, the first inlet 141, the second inlet 241, and the first and second quenchs 121 and 221 are located below the first or second cases 100 and 200, respectively. The outlet passage 151, the second outlet passage 251, and the first and second outlet passages 131 and 231 are located above the first or second cases 100 and 200, respectively, so that fluid in each layer It is more preferable to allow the flow from the lower side to the upper side.

In addition, the second case 200 also has components corresponding to the first inlet 140, the first inlet 141, the first outlet 150, and the first outlet 151 of the first case 100. In addition, the first case 100 has a second inlet 240, a second inlet 241, a second outlet 250 and the second outlet 251 of the second case 200. By further configuring the corresponding components, additional flow paths can be obtained for inlet and outlet.

In an embodiment of the present invention, the raw water having a high ion concentration is supplied to the spacer layer 330 to be converted into soft water, and the ion collecting 310 layer is supplied with general water having a lower ion concentration than this and discharged into concentrated water, which is ion This is because the greater the difference in ion concentration between the raw water to be removed and the general water flowing through the ion collecting layer 310 for collecting ions, the better the softening performance and the lower the current consumption for the softening process. In addition, when the general water ion concentration supplied to the first and second electrodes 410 and 420 is not low, current may flow well between the first and second electrodes 410 and 420. However, all of the same water may be supplied, and in this case, the training process may be performed.

The electrodialysis water softener according to the present invention uses only two electrode plates irrespective of the number of layers to be stacked, so the structure is very simple, and simply a plurality of layers are stacked, so that partial replacement or repair of the layers is very easy. It is very easy to manufacture water softeners of various shapes and capacities according to the required performance. In addition, by applying a square wave voltage, the instantaneous application and interruption of the current are repeated, thereby further increasing ion capture and regeneration performance, and using less power.

On the other hand, the electrodialysis water softener according to the present invention, in addition to the water softening process, brine purification process, groundwater treatment process, nitrogenous nitrogen treatment process, purified water treatment process, heavy metal removal process, plating wastewater valuable metal recovery process, amino acid and organic acid separation and purification process, It is widely used in the environment, food and various industries such as desalination process of processed meat products, ranch desalination process, advanced water purification process, ultrapure water manufacturing process in semiconductor industry or automobile industry, hard recovery process in steel industry and desalination process of oil refinery waste. Can be.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a block diagram of a water softener according to the prior art,

2 is a block diagram of an electrodialysis water softener according to an embodiment of the present invention;

3a and 3b is a structural diagram of the first and second cases of the electrodialysis water softener according to an embodiment of the present invention,

4 is a structural diagram showing a laminated structure of a raw water treatment filter of an electrodialysis softener according to an embodiment of the present invention;

5 is a front view of a spacer layer of an electrodialysis water softener according to an embodiment of the present invention, and

Figure 6 is a flow chart showing the flow path of the raw water and the concentrated water of the electrodialysis softener according to an embodiment of the present invention.

Description of the main parts of the drawing

100: first case 200: second case

300: raw water treatment filter 310: ion collecting layer

320: cation exchange layer 330: spacer layer

340: anion exchange layer 350: electrode spacer layer

410: first electrode plate 420: second electrode plate

Claims (9)

A first case; Second case; A raw water treatment filter disposed between the first case and the second case; A first electrode plate disposed between the first case and the raw water treatment filter; And A second electrode plate disposed between the second case and the raw water treatment filter Including, The first case and / or the second case includes an inlet passage for supplying raw water to the raw water treatment filter, The first case and / or the second case includes at least one soft water outlet for discharging soft water from the raw water treatment filter, The first case and / or the second case includes at least one concentrated water outlet for discharging the concentrated water from the raw water treatment filter, And the first and second cases firmly fix the raw water treatment filter, and perform a softening operation and a regenerating operation by switching the electrodes applied to the first and second electrode plates. The method of claim 1, The raw water treatment filter, First and second ion collecting layers capable of collecting ions; A spacer layer providing a space through which the incoming raw water can pass; A cation exchange layer for passing only cations in the incoming raw water; And Anion exchange layer for passing only the anion of the incoming raw water Including, And the first ion collecting layer, the cation exchange layer, the spacer layer, the anion exchange layer, and the second ion collecting layer in the order of the electrodialysis water softener. delete The method of claim 2, The spacer layer is hydrodynamically disconnected from the brine outlet and hydrodynamically connected to allow the incoming raw water to flow into the softener outlet, And the first and second ion collecting layers are hydrodynamically disconnected from the soft water outlet and are hydrodynamically connected to allow the incoming raw water to flow into the concentrated water outlet. The method of claim 4, wherein An electrodialysis water softener, wherein a square wave voltage is applied between the first and second electrode plates. The method of claim 5, The first case is provided with a first scavenging channel for supplying the raw water to the first electrode plate and a first squirting channel for discharging the raw water, And a second scavenging channel for supplying the raw water to the second electrode plate and a second scavenging channel for discharging the raw water in the second case. The method of claim 6, And an electrode spacer layer respectively configured for a smooth flow of raw water between the first and second electrode plates and the raw water treatment filter. The method of claim 7, wherein An electrodialysis water softener, characterized in that a TDS meter is installed in at least one of the concentrated water outlet and the soft water outlet. The method according to any one of claims 2 or 4 to 8, The spacer layer has a mesh for a space through which the raw water can pass, and the line intersecting in the mesh forms an oblique line with the flow direction of the raw water.

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