KR102304266B1 - filter for water purifier and water purifier using thereof - Google Patents

Abstract

The filter for a water purifier according to the present invention and a water purifier including the same include a filter housing having an inlet and an outlet, and a filter module provided in the filter housing to purify water introduced through the inlet and supply it to the outlet. , The filter module includes at least one selected from among iron hydroxide (Ferric Hydroxide), titanium tetraoxide (Titanate), zeolite (Zeolite), titanium dioxide (Titanium dioxide), anion exchange resin, cadmium (Cd), manganese 11 kinds of heavy metals in water including (Mn) and zinc (Zn) can be removed.

Description

Filter for water purifier and water purifier including same {filter for water purifier and water purifier using thereof}

The present invention relates to a filter for a water purifier and a water purifier including the same.

A water purifier refers to a device that purifies raw water such as tap water or groundwater. That is, it refers to a device for converting raw water into drinking water through various purification methods and providing it.

In order to generate purified water, processes such as precipitation, filtration, and sterilization may be performed, and harmful substances are generally removed through these processes.

In general, a water purifier may be provided with various filters to purify raw water. These filters may be classified into a sediment filter, an activated carbon filter, a UF hollow fiber membrane filter, an RO membrane filter, and the like according to their functions.

The sediment filter can be called a filter for precipitating contaminants or suspended matter having large particles in raw water, and the activated carbon filter is a filter for adsorbing and removing contaminants with small particles, residual chlorine, volatile organic compounds or odor generating factors. can

In addition, the activated carbon filter may generally be provided with two. That is, it may be provided with a pre-activated carbon filter provided on the raw water side and a post-activated carbon filter provided on the purified water side. The post activated carbon filter may be provided to improve the taste of water by removing odor-causing substances that mainly affect the taste of purified water.

In addition, the UF hollow fiber membrane filter and the RO membrane filter are generally used selectively.

Recently, the demand for water purifiers has increased significantly. Therefore, there is a problem that various requirements are generated and it is difficult to satisfy them at the same time.

As an example, it is possible to remove heavy metals by applying the RO membrane filter, but there is a problem in that it is difficult to secure the purified water flow rate. That is, there is a problem in that it takes a lot of time to obtain a desired amount of purified water.

On the other hand, in the case of the UF hollow fiber membrane filter, it is possible to secure a high flow rate, but since it is difficult to remove heavy metals in water, there is a problem in that it is difficult to use groundwater or tap water from a contaminated area as raw water.

Therefore, removal of heavy metals and securing high flow rates were inevitably recognized as contradictory problems. This is because it is difficult to secure high flow when using an RO membrane filter to remove heavy metals, and it is difficult to remove heavy metals when using a UF hollow fiber membrane filter to secure high flow.

In addition, in the conventional case, among heavy metals in water, arsenic (As), selenium (Se), lead (Pb), aluminum (Al), mercury (Hg), chromium (Cr), iron (Fe), copper (Cu) A heavy metal removal filter has been manufactured with the main purpose of removing a total of 8 types including.

However, in recent years, as well as the above 8 types, removal of 11 types including cadmium (Cd), manganese (Mn), and zinc (Zn) in water is required.

However, in the case of a conventional water purifier filter, it is not sufficient to completely remove the eight kinds of heavy metals while ensuring a high flow rate, and the removal of cadmium (Cd), manganese (Mn), zinc (Zn), etc. There is a problem that is not being done at all.

The present invention solves the above problems, and proposes a filter for a water purifier capable of effectively removing heavy metals in water including cadmium (Cd), manganese (Mn) and zinc (Zn) in water and a water purifier including the same.

The present invention proposes a filter for a water purifier capable of removing heavy metals such as lead, mercury, arsenic, serenium, iron, chromium, aluminum, copper, etc. in water while securing a treatment capacity, and a water purifier including the same.

The present invention proposes a filter for a water purifier capable of removing at least 11 kinds of heavy metals and a water purifier including the same.

The present invention proposes a filter for a water purifier that can be directly applied to an existing water purifier without changing the shape or arrangement structure of the filter applied to the water purifier, and a water purifier including the same.

The present invention proposes a filter for a water purifier that can increase space utilization by reducing the volume of the filter by arranging heterogeneous filters in one filter housing in the longitudinal direction, and a water purifier including the same.

The filter for a water purifier according to the present invention includes a filter housing having an inlet and an outlet, and a filter module provided in the filter housing to purify water introduced through the inlet and supply it to the outlet, the filter module silver, iron hydroxide, titanium tetraoxide, zeolite, titanium dioxide, and an anion exchange resin, at least one selected from among.

In addition, the filter is provided with a hollow fiber membrane filter (UF filter) having a built-in carbon block in the form of a hollow tube and a plurality of hollow fiber membranes.

In addition, the free carbon filter further includes an anion exchange resin nonwoven fabric surrounding the outside of the carbon block.

In addition, the anion exchange resin nonwoven fabric is provided with at least three layers.

In addition, the free carbon filter further includes zeolite particles filled in the hollow portion of the carbon block.

In addition, the zeolite is in a state in which the manganese oxide is coated.

In addition, the zeolite particles are filled by 10-12% based on the weight of the carbon block.

In addition, the carbon block is prepared by mixing activated carbon, iron hydroxide, titanium tetraoxide and a binder.

In addition, the carbon block is prepared by mixing 20-30 wt% of iron hydroxide, 25-30 wt% of titanium tetraoxide, 15-20 wt% of activated carbon, and 24-28 wt% of a binder.

In addition, titanium dioxide particles are embedded in the hollow fiber membrane filter (UF filter).

In addition, the filter further includes a post-carbon filter having a carbon block in the form of a hollow tube so that water passing through the pre-carbon filter and the hollow fiber membrane filter passes.

In addition, the post-carbon filter and the hollow fiber membrane filter are arranged in a line in one filter housing.

According to the present invention, there is an effect of reliably removing heavy metals in water including cadmium (Cd), manganese (Mn) and zinc (Zn) in water.

According to the present invention, there is an effect of removing heavy metals such as lead, mercury, arsenic, serenium, iron, chromium, aluminum, and copper in water while securing the treatment capacity.

According to the present invention, there is an effect that can remove at least 11 kinds of heavy metals.

According to the present invention, the water purification process is performed several times by a plurality of filters, and there is an effect that the removal of various foreign substances including heavy metals can be performed more reliably.

According to the present invention, since only the material of the filter is changed and the shape or arrangement structure of the filter applied to the water purifier is not changed, there is an effect that can be directly applied to the existing water purifier.

According to the present invention, space utilization can be increased by arranging heterogeneous filters in one filter housing in the longitudinal direction to reduce the volume of the filter, and furthermore, there is an effect that the water purifier can be slimmed down.

1 is a perspective view showing an example of a water purifier according to an embodiment of the present invention.
FIG. 2 is a configuration diagram showing an example of a piping configuration of the water purifier shown in FIG. 1 .
3 is a view conceptually showing a filter assembly, which is a part of the present invention.
4 is a cross-sectional view of a pre-carbon filter, which is a component of the present invention.
5 is a view schematically showing a carbon block constituting a pre-carbon filter, which is a part of the present invention.
6 is a cross-sectional view of a composite filter, which is a component of the present invention.
7 is a view showing a mechanism by which cadmium in water is removed.
8 is a diagram illustrating a mechanism in which chromium (Cr) and serenium (Se) are removed from an anion exchange resin.
9 to 11 are views showing a mechanism in which zinc, manganese, and copper in water are removed by titanium oxide.
12 is a table showing a heavy metal removal effect of a filter for a water purifier according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented below, and those skilled in the art who understand the spirit of the present invention may change other embodiments included within the scope of the same spirit by adding, changing, deleting, and adding components. It will be easy to implement, but this will also be included within the scope of the present invention.

The drawings accompanying the following embodiments are embodiments of the same inventive idea, but within the scope that the inventive idea is not damaged, in order to be easily understood, the representation of minute parts may be expressed differently for each drawing. and a specific part may not be indicated according to the drawings, or may be exaggerated according to the drawings.

1 is a perspective view of a water purifier according to an embodiment of the present invention.

Referring to FIG. 1 , the water purifier 10 according to an embodiment purifies water directly supplied from an external water supply source and then cools or heats it to take it out. For example, it may be a direct water type cold/hot water purifier.

Here, the direct water purifier refers to a type of water purifier in which purified water is extracted during a user's purified water extraction operation without a storage tank in which purified water is stored.

In addition, the water purifier 10 may have an external shape by combining a plurality of panels. More specifically, the water purifier 10 includes a front panel 11 forming a front exterior, a side panel 12 forming both side exteriors, a top panel 13 forming a top exterior, and a rear surface It may have a substantially hexahedral shape as a whole by combining the rear panel forming the outer appearance and the base panel forming the lower outer appearance. In addition, a plurality of parts for water purification are mounted in the inner space formed by combining the panels.

In addition, the front panel 11 is provided with an operation display unit 14 for displaying an operation state of the water purifier 10 while the user inputs an operation command for the water purifier 10 .

The operation display unit 14 is provided in the form of a plurality of buttons or a touch screen, and is formed so that light can be irradiated to each button. That is, when the user presses or touches the button of the operation display unit 14 , light is irradiated to the selected button, so that it can be easily recognized whether the button is selected, and the function of the display unit is also performed at the same time.

The operation display unit 14 is provided with a button for selecting the type of water to be taken, that is, cold water, hot water, or purified water (room temperature water), a button for continuous water dispensing, etc. and a display unit for displaying the temperature of the cold water is provided.

Of course, the operation display unit 14 may further include a button for performing an additional function, and a configuration in which some buttons are omitted may be possible.

A water chute 15 operable by a user to dispense purified water is provided below the operation display unit 14 . The water chute 15 is provided so that a user can operate it to dispense 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 is clarified that it can be expressed as an opening/closing device or an opening/closing nozzle.

The water chute 15 is configured so that purified water, cold water, or hot water can be dispensed according to the function of the water purifier 10 by a user's operation, and the lower side of the water chute 15, specifically, the front surface of the water chute 15 A tray for accommodating water falling from the water chute 15 is provided at the lower front end of the panel 11 .

The tray is formed in the form of a hexahedron having a certain amount of internal space, and a grill-shaped cover for filtering foreign substances is provided on the upper surface of the tray. The tray is movable in the front of the front panel 11, and by this movement, a user can store purified water in a water bottle having a height or a container having a wide bottom.

And, the tray is further provided with a buoy for checking the level of water accommodated in the inner space, and by checking this buoy, the user can recognize the time to empty the water accommodated in the tray, and the convenience of use is improved has the advantage of being

Although not shown, inside the panels constituting the outer shape of the water purifier 10, a plurality of refrigerant cycles for cooling water, a cold water generating unit for generating cold water, and a hot water generating unit for heating water components are accommodated.

In detail, the water purifier 10 includes at least a compressor for compressing a refrigerant into a high-temperature and high-pressure gaseous refrigerant, a condenser for condensing the refrigerant discharged from the compressor into a high-temperature and high-pressure liquid refrigerant, and a condensing fan for heat exchange with the condenser. It may include some or all.

In addition, the water purifier 10 may further include a filter assembly for filtering foreign substances contained in the water supplied from the water supply source. The filter assembly may include a carbon filter.

In addition, the water purifier 10 may further include an expansion valve for expanding the refrigerant discharged from the condenser into a low-temperature and low-pressure two-phase refrigerant, and an evaporator (described later) through which the low-temperature and low-pressure two-phase refrigerant passing through the expansion valve flows. can

In addition, the water purifier 10 may further include a cold water generating unit (to be described later) including the evaporator and a cold water pipe (to be described later) through which cold water flows.

In addition, the water purifier 10 may further include a hot water heater for heating the supplied water to a set temperature.

FIG. 2 is a configuration diagram showing an example of a piping configuration of the water purifier shown in FIG. 1 .

Referring to FIG. 2 , a water supply line L is formed from the water supply source S to the water chute 15 of the water purifier 10, and various valves and water purification parts can be connected to the water supply line L. have.

More specifically, the water supply line (L) is connected to the water supply source (S), for example, a domestic faucet, and a filter assembly 17 is disposed at any point of the water supply line (L), the water supply source Foreign substances contained in the drinking water supplied from (S) are filtered.

In addition, the water supply valve 61 and the flow rate sensor 70 may be sequentially disposed in the water supply line L connected to the outlet end of the filter assembly 17 . Accordingly, when the supply amount sensed by the flow rate sensor 70 reaches a set flow rate, the water supply valve 61 may be controlled to close.

In addition, at any point of the water supply line (L) extending from the outlet end of the flow sensor 70, a water supply line (L1) for hot water supply, a water supply line (L3) for supplying cold water, and a water supply line (L2) for supplying cooling water This can be branched.

In addition, a purified water outlet valve 66 is mounted at the end of the water supply line L extending from the outlet end of the flow sensor 70, and a hot water outlet valve 64 is installed at the end of the water supply line L1 for hot water supply. can be installed. In addition, a cold water outlet valve 65 may be mounted at an end of the water supply line L3 for supplying cold water, and a cooling water valve 63 may be mounted at any point of the water supply line L2 for supplying cooling water. The cooling water valve 63 controls the amount of cooling water supplied to the cooling water generating unit 20 .

In addition, the hot water outlet valve 64 , the cold water outlet valve 65 , and the water supply line extending from the outlet ends of the purified water outlet valve 66 are all connected to the water chute 15 . And, as shown, the purified water, cold water, and hot water may be configured to be connected to a single outlet, or may be configured to be respectively connected to independent outlets in some cases.

Hereinafter, the cold water and hot water supply process will be described.

First, in the case of cold water, when the cooling water valve 63 is opened and cooling water is supplied to the cold water generating unit 20 , the water in the cold water supply line L3 passing through the cold water generating unit 20 is cooled by the cooling water. Cold water is produced.

In this case, the cooling water supply line L2 may include a refrigerant cycle for cooling the cooling water. The refrigerant cycle may include a compressor, a condenser, an expansion valve, an evaporator, and the like.

Thereafter, when the cold water outlet valve 65 is opened by pressing the cold water selection button of the operation display unit, cold water may be discharged through the water chute 15 .

On the other hand, in the case of hot water, hot water is generated while the water flowing along the water supply line L1 for hot water supply is heated by the hot water heater 30, and the hot water outlet valve 64 is opened by pressing the hot water selection button of the operation display unit. When opened, hot water may be taken out through the water chute 15 .

The water purifier according to an embodiment of the present invention having the above configuration includes at least one water purifier filter to generate purified water from raw water. For the water purifier filter, reference will be made to the following description.

Hereinafter, a filter for a water purifier according to an embodiment of the present invention will be described.

3 is a view conceptually showing a filter assembly, which is a part of the present invention. And, Figure 4 is a cross-sectional view of a pre-carbon filter, which is a component of the present invention. And, Figure 5 is a view schematically showing the carbon block constituting the pre-carbon filter, which is a part of the present invention. And, FIG. 6 is a cross-sectional view of a composite filter, which is a component of the present invention.

3 to 6 , a filter for a water purifier (hereinafter, referred to as a filter assembly) according to an embodiment of the present invention includes a pre-carbon filter 100 having a carbon block 121 in the form of a hollow tube and a plurality of hollow fiber membranes. (220) may include at least one of the built-in hollow fiber membrane filter 200 and the carbon block 320 in the form of a hollow tube built-in post carbon filter (300).

For example, the filter assembly 17 may include a pre-carbon filter 100 , a hollow fiber membrane filter 200 , and a post-carbon filter 300 .

The free carbon filter 100 includes a filter housing 110 and a filter module 120 .

The filter housing 110 includes an inlet 111 and an outlet 112 . That is, water requiring purified water is introduced through the inlet 111 , and purified water is discharged through the outlet 112 . Accordingly, water is purified by the filter module 120 disposed therebetween while flowing between the inlet 111 and the outlet 112 .

In addition, the filter housing 110 forms a space in which the filter module 120 is accommodated, and may include an upper cap 113 having an inlet 111 and an outlet 112 formed therein. In this case, the space portion of the filter housing 110 may communicate with the outside through the inlet 111 and the outlet 112 of the upper cap 113 .

When the upper cap 113 is provided as described above, the filter module 120 can be easily mounted in the space of the filter housing 110 by opening the upper cap 113, and the filter module ( 120) can be easily replaced.

Water introduced into the filter housing 110 through the inlet 111 may be purified while passing through the filter module 120 . That is, foreign substances (eg, heavy metals) included in raw water such as tap water may be removed while passing through the filter module 120 .

According to the present embodiment, it is possible to provide a filter for a water purifier excellent in removing heavy metals in water and a water purifier having the same.

To this end, the filter module 120 preferably includes at least one of iron hydroxide, titanium tetraoxide, zeolite, titanium dioxide, and anion exchange resin nonwoven fabric. .

First, the filter module 120 may include titanium tetraoxide.

For example, the titanium tetraoxide (Titanate) may be provided with _{sodium ortho titanate (Na 4} TiO _{4 ).}

The sodium orthotitanate (Na ₄ TiO ₄ ) may include a functional group such as the following formula (1).

(1)

(One)

That is, a plurality of oxygens (O) may each be bonded to sodium (Na), and each oxygen (O) may include a functional group covalently bonded to one titanium (Ti).

In addition, sodium orthotitanate (Na ₄ TiO ₄ ) as described above can remove heavy metals in water through a chemical reaction such as the following Formula (2).

Na ₄ TiO ₄ + 2Me ⁺⁺ → Me ₂ TiO ₄ + 4Na ⁺ (2)

In Formula (2), 'Me' means a heavy metal, and the heavy metal is dissolved in water in the form of a water-soluble compound.

Through the chemical reaction of the water-soluble heavy metal compound and the sodium orthotitanate (Na ₄ TiO ₄ ), the purified water from which the heavy metal (Me) is removed is discharged to the outside of the filter housing 110 through the outlet 112 .

For example, 'Me' may correspond to cadmium (Cd).

In this case, sodium orthotitanate (Na ₄ TiO ₄ ) may remove cadmium (Cd) in water through a chemical reaction such as Formula (3) below.

Na ₄ TiO ₄ + 2Cd ⁺⁺ → Cd ₂ TiO ₄ + 4Na ⁺ (3)

On the other hand, the sodium orthotitanate (Na ₄ TiO ₄ ) may be formed in the form of granules or powders.

For example, the sodium orthotitanate (Na ₄ TiO ₄ ) may be mixed with the material of the carbon block 121 constituting the filter module 120 to form the carbon block 121 .

As another example, the sodium orthotitanate (Na ₄ TiO ₄ ) may be filled in the inner space of the carbon block 121 .

Therefore, when the water containing the heavy metal passes through the filter module 120, the heavy metal in the water can be removed.

In addition, the filter module 120 may include iron hydroxide (Ferric Hydroxide).

Here, the iron hydroxide (Ferric Hydroxide) may mean a synthetic iron hydroxide (α-FeOOH) compound.

The synthetic iron hydroxide (α-FeOOH) compound may include a functional group represented by the following formula (4).

(4)

(4)

That is, in the synthetic iron hydroxide (α-FeOOH) compound, a plurality of iron (Fe) bonds to a hydroxyl group (-OH), respectively, and each iron (Fe) is ionic or covalently bonded to one oxygen (O). It may contain functional groups.

As an example of such a synthetic iron hydroxide (α-FeOOH) compound, the trade name 'Bayoxide E33HCF' provided by LanXess may be used.

The synthetic iron hydroxide (α-FeOOH) compound can remove heavy metals in water through a chemical reaction such as the following formula (5).

(5)

(5)

Here, A means a heavy metal, and the heavy metal may be dissolved in water in the form of a water-soluble compound.

As described above, when the water-soluble heavy metal compound and the synthetic iron hydroxide (α-FeOOH) compound undergo a chemical reaction, water and hydroxide ions are generated. In addition, the heavy metal (A) has a strong ionic or covalent bond with the synthetic iron hydroxide (α-FeOOH) compound. Accordingly, it is possible to prevent the removed heavy metal (A) from being dissolved in water again. And, the purified water from which the heavy metal (A) has been removed through the filter module 120 is discharged to the outside of the filter housing 110 through the outlet 112 . For example, the heavy metal (A) may be 'arsenic'.

For reference, the iron hydroxide can remove cadmium (Cd) in water through a chemical reaction such as Equation (6) and FIG. 7 .

2Fe ^{2 +} + Cd ^{2 +} + 4OH ^- -> CdFe ₂ O ₄ + 2H ₂ (6)

Meanwhile, the synthetic iron hydroxide (α-FeOOH) compound may be formed in the form of granules or powders.

For example, the synthetic iron hydroxide (α-FeOOH) compound may be mixed with the material of the carbon block 121 constituting the filter module 120 to form the carbon block 121 .

As another example, the synthetic iron hydroxide (α-FeOOH) compound may be filled inside the carbon block 121 .

Therefore, when the water containing the heavy metal passes through the filter module 120, the heavy metal in the water can be removed.

Meanwhile, the carbon block 121 may further include activated carbon and a binder.

The activated carbon may be included in the form of granular or powder. As described above, when the carbon block 121 includes activated carbon, the carbon block 121 can effectively remove heavy metals in water and also residual chlorine components in water. Accordingly, the taste of water may also be improved.

In addition, chloroform (CHCL ₃ ) in water by the activated carbon can also be effectively removed.

In addition, the carbon block 121 may further include iron hydroxide (Ferric Hydroxide) and titanium tetraoxide (Titanate) in order to improve the heavy metal removal efficiency.

At this time, the binder is mixed with activated carbon and titanium tetraoxide (Titanate), sodium orthotitanate (Na ₄ TiO ₄ ) and iron hydroxide (Ferric Hydroxide), synthetic iron hydroxide (α-FeOOH) compound to connect with each other, and to impart rigidity.

With the configuration of the binder, activated carbon, sodium orthotitanate (Na ₄ TiO ₄ ), and synthetic iron hydroxide (α-FeOOH) compound may be processed into a filter having rigidity.

For example, the filter module 120 may be formed by mixing the above-mentioned materials uniformly and then putting it in a mold and heating it. By heating in the mold, a binder, for example, polyethylene is melted, and sodium orthotitanate (Na ₄ TiO ₄ ), a synthetic iron hydroxide (α-FeOOH) compound, and activated carbon are bonded to the polyethylene. Accordingly, the filter module 120 in the form of a block having overall rigidity can be formed.

In general, in a water purifier, several filters are already installed in order to remove heavy metals and various foreign substances in water.

In addition, existing water purifiers have a limited space for installing filters, so it is not easy to add new filters, and each filter installed in the water purifier (eg, activated carbon filter) basically has an individual function to improve water purification performance. Therefore, it is also undesirable to omit the existing filter in order to add a new filter.

However, in the present invention, the carbon block 121 may be formed by mixing activated carbon with sodium orthotitanate (Na4TiO4) or synthetic iron hydroxide (α-FeOOH) compound.

Therefore, it is possible to remove even heavy metals in water without increasing the number of filters while maintaining the unique function and effect of the activated carbon filter installed in the existing water purifier. In addition, since the number of filters is not increased, it is possible to prevent a decrease in the purified water flow rate.

In this embodiment, the carbon block 121, synthetic iron hydroxide (α-FeOOH) compound 25-30% by weight, sodium ortho titanate (Na4TiO4) 25-30% by weight, activated carbon 15-20% by weight, binder 24-28 It can be prepared by mixing % by weight.

In detail, the carbon block 121 may be prepared by mixing 28 wt% of a synthetic iron hydroxide (α-FeOOH) compound, 28 wt% of sodium orthotitanate (Na4TiO4), 17.5 wt% of activated carbon, and 26 wt% of a binder.

At this time, when the ratio of sodium orthotitanate (Na4TiO4) and synthetic iron hydroxide (α-FeOOH) compound is greater than the above-mentioned ratio, the heavy metal removal performance is increased, but the purified water flow rate may be decreased. On the other hand, when the ratio of sodium orthotitanate (Na4TiO4) and synthetic iron hydroxide (?-FeOOH) compound is smaller than the above ratio, the purified water flow rate is increased, but the heavy metal removal performance may be reduced.

Therefore, it is preferable that the synthetic iron hydroxide (α-FeOOH) compound and sodium orthotitanate (Na4TiO4) be mixed in an amount of 25-30% by weight, respectively.

In this embodiment, the mixing ratio of sodium orthotitanate (Na4TiO4) and synthetic iron hydroxide (α-FeOOH) compound may be variously adjusted according to the type and ratio of heavy metals included in the water to be purified.

In addition, when the ratio of activated carbon becomes larger than the above ratio, it becomes difficult to secure heavy metal removal performance, and when the ratio of activated carbon becomes smaller than the above-mentioned fattening ratio, it is difficult to remove chloroform and chlorine components in water, so activated carbon is 15- It is preferable to mix 20% by weight.

In addition, when the mixing ratio of the binder is smaller than the above ratio, the combination of sodium orthotitanate (Na4TiO4), synthetic iron hydroxide (α-FeOOH) compound, and activated carbon is not made properly, or to secure the rigidity of the manufactured filter module 120 It is difficult, and when the mixing ratio of the binder exceeds the above ratio, the ratio of sodium orthotitanate (Na4TiO4), synthetic iron hydroxide (α-FeOOH) compound, and activated carbon is too low to perform the filter role properly, so the binder is 24 -28% by weight is preferably mixed.

In addition, the mixing ratio of sodium orthotitanate (Na4TiO4), synthetic iron hydroxide (α-FeOOH) compound, binder, and activated carbon described above is within a range in which water purification capacity is secured to some extent, and heavy metals, chloroform, etc. in water can be safely removed. It can be variously adjusted.

According to the present invention as described above, the raw water introduced into the filter housing 110 passes through the carbon block 121 in which sodium orthotitanate (Na4TiO4) and synthetic iron hydroxide (α-FeOOH) compounds are mixed, heavy metals are removed and can be purified.

In addition, the filter module 120 may further include an anion exchange resin nonwoven fabric 122 surrounding the outside of the carbon block 121 .

When the anion exchange resin nonwoven fabric 122 is provided on the outside of the carbon block 121 as described above, the raw water flowing into the free carbon filter 100 passes through the anion exchange resin nonwoven fabric 122, and then sodium orthotitanate (Na4TiO4) And the synthetic iron hydroxide (α-FeOOH) compound is passed through the mixed carbon block 121.

When the raw water passes through the anion exchange resin nonwoven fabric 122 as described above, heavy metals such as chromium (Cr) and serenium (Se) may be removed.

At this time, the anion exchange resin nonwoven fabric 122 may be provided with at least three layers in order to improve the heavy metal removal efficiency.

8 is a diagram illustrating a mechanism in which chromium (Cr) and selenium (Se) are removed from an anion exchange resin.

Referring to FIG. 8 , when raw water passes through the anion exchange resin nonwoven fabric 122 , it can be confirmed that chromium (Cr) and serenium (Se) in the water can be removed through anion exchange.

In addition, the filter module 120 may further include zeolite particles 123 filled in the hollow portion 121a of the carbon block 121 .

In this case, the zeolite particles 123 may be in a state in which the manganese oxide is coated.

In addition, the zeolite particles 123 may be filled by 10-12% based on the weight of the carbon block 121 .

In addition, the zeolite particles 123 may be filled in 70-80% of the hollow portion 121a of the carbon block 121 . Therefore, a greater flow is generated in the hollow portion 121a of the carbon block 121, and accordingly, the contact time between water and the zeolite particles 123 is increased, and the heavy metal removal efficiency is improved.

With the configuration of the manganese dioxide-coated zeolite as described above, iron, manganese, hydrogen sulfide, arsenic, lead, copper, zinc, etc. contained in raw water can be removed.

According to the above, the raw water introduced into the free carbon filter 100 passed through the carbon block 121 in which the anion exchange resin nonwoven fabric 122, sodium orthotitanate (Na4TiO4), and synthetic iron hydroxide (α-FeOOH) compound were mixed. Then, it passes through the manganese dioxide-coated zeolite particles 123 , and is discharged to the outside of the free carbon filter 100 .

In addition, the filter assembly 17 may include a hollow fiber membrane filter 200 having a plurality of hollow fiber membranes 220 embedded therein and a post carbon filter 300 having a hollow tube type carbon block 320 embedded therein. .

In addition, when the hollow fiber membrane filter 200 and the post-carbon filter 300 are additionally provided as described above, the water introduced into the filter assembly 17 is the pre-carbon filter 100, the hollow fiber membrane filter 200 and the post-carbon filter. While passing through (300), the purification is made several times, there is an effect that the removal of various foreign substances including heavy metals can proceed more reliably.

In particular, by the additionally provided post-carbon filter 300, chlorine component and chloroform (CHCL ₃ ) in water can be more reliably removed.

In this embodiment, the hollow fiber membrane filter 200 and the post-carbon filter 300 may be accommodated in one filter housing 400 to constitute a composite filter. In this case, the hollow fiber membrane filter 200 and the post-carbon filter 300 may be arranged in a line so that water passing through the hollow fiber membrane filter 200 passes through the post-carbon filter 300 .

In detail, the hollow fiber membrane filter 200 includes an auxiliary filter housing 210 and a hollow fiber membrane 220 , and the post-carbon filter 300 includes an auxiliary filter housing 310 and a carbon block 320 . In addition, the auxiliary filter housings 210 and 310 are accommodated inside the filter housing 400 .

As described above, when the hollow fiber membrane filter 200 and the post-carbon filter 300 are arranged in a line in one filter housing 400, the filtration efficiency can be increased while maintaining the purified water flow rate.

In addition, without the need to expand the filter installation space formed in the water purifier, it can be applied immediately by simply replacing the existing filter.

In addition, space utilization can be increased by reducing the volume of the filter, and furthermore, slimming of the water purifier can be realized.

In this embodiment, inside the auxiliary filter housing 210 of the hollow fiber membrane filter 200, titanium dioxide particles 230 may be embedded. Here, the titanium dioxide particles 230 may be provided in an amount of about 3% based on the weight of the carbon block 121 .

9 to 11 are views showing a mechanism in which zinc, manganese, and copper in water are removed by titanium oxide.

9 to 11 , it can be confirmed that zinc, copper, manganese, and the like can be removed by titanium oxide.

As described above, the raw water introduced into the water purifier is purified while passing through the free carbon filter 100 and the composite filters 200 and 300 .

In detail, the raw water introduced into the free carbon filter 100 is first filtered while passing through the anion exchange resin nonwoven fabric 122, and a carbon block in which sodium orthotitanate (Na4TiO4) and synthetic iron hydroxide (α-FeOOH) are mixed ( 121) through secondary filtration. Then, after the tertiary filtration while passing through the manganese dioxide-coated zeolite particles 123, the free carbon filter 100 is discharged to the outside.

Here, the secondary filtration process may be further divided into a filtration process by a synthetic iron hydroxide (α-FeOOH) compound, a filtration process by sodium orthotitanate (Na4TiO4), and a filtration process by activated carbon.

As described above, the water discharged from the free carbon filter 100 is introduced into the composite filters 200 and 300 .

The raw water introduced into the composite filters 200 and 300 is first introduced into the hollow fiber membrane filter 200 , and is filtered 4 times by the titanium dioxide particles 230 , and then is filtered 5 times while passing through the hollow fiber membrane 220 . Thereafter, the water discharged from the hollow fiber membrane filter 200 flows into the post-carbon filter 300 , passes through the carbon filter 320 , is filtered for the sixth time, and then is discharged to the outside of the post-carbon filter 300 .

Accordingly, the raw water introduced into the filter assembly 17 may be purified as purified water from which a total of 11 kinds of heavy metals and foreign substances have been removed while undergoing six or more stages of filtration.

Hereinafter, the heavy metal removal effect of the water purifier filter according to the present invention will be described with reference to FIG. 12 .

First, to test the heavy metal removal effect of sodium orthotitanate (Na4TiO4) and iron hydroxide (FeOOH), a heavy metal removal filter was manufactured with the following two mixing ratios.

<Example 1>

For example, 5.7 g of sodium orthotitanate (Na 4 TiO 4 ), 13.3 g of iron hydroxide (FeOOH), 31.7 g of a binder, and 44.3 g of activated carbon were mixed to prepare a 95 g heavy metal removal filter 100 .

<Example 2>

As another example, a heavy metal removal filter of 95 g was prepared by mixing 19 g of iron hydroxide (FeOOH), 31.7 g of a binder, and 44.3 g of activated carbon.

Then, as a result of a self-experiment of passing water through the heavy metal removal filter 100 containing sodium orthotitanate (Na4TiO4) according to <Example 1>, lead, mercury, arsenic, serenium, iron, chromium, and aluminum in water , it was confirmed that copper and cadmium were removed.

In addition, although not perfect, it was confirmed that manganese and zinc were partially removed.

On the other hand, as a result of passing water through a heavy metal removal filter containing no sodium orthotitanate (Na4TiO4) according to <Example 2>, lead, mercury, arsenic, serenium, iron, chromium, aluminum, and copper in water were removed was able to confirm

That is, most heavy metals in the water can be removed by iron hydroxide (FeOOH), but in the case of the heavy metal removal filter 100 containing sodium ortho titanate (Na 4 TiO 4 ), heavy metal removal filter that does not contain sodium ortho titanate (Na 4 TiO 4 ) Compared with , there was an effect of additionally removing cadmium (Cd).

Claims (13)

a filter housing having an inlet and an outlet;
a filter module provided in the filter housing to purify water introduced through the inlet and supply it to the outlet;
The filter module includes a carbon block manufactured by mixing activated carbon, iron hydroxide, titanium dioxide and a binder,
The carbon block is
A filter for a water purifier, characterized in that it is prepared by mixing 20-30% by weight of iron hydroxide and 15-20% by weight of activated carbon.
The method of claim 1,
The carbon block is a filter for a water purifier formed in the form of a hollow tube.
The method of claim 1,
The filter module is a filter for a water purifier, characterized in that it is provided with a carbon filter having the carbon block built-in and/or a hollow fiber membrane filter (UF filter) having a plurality of hollow fiber membranes built-in.
4. The method of claim 3,
The carbon filter further comprises an anion exchange resin nonwoven fabric surrounding the outside of the carbon block,
The anion exchange resin nonwoven fabric is a filter for a water purifier, characterized in that at least three layers are provided.
4. The method of claim 3,
The carbon filter, filter for water purifier, characterized in that it further comprises zeolite particles filled in the hollow portion of the carbon block.
6. The method of claim 5,
The zeolite is a filter for a water purifier, characterized in that the manganese dioxide is coated.
6. The method of claim 5,
The filter for a water purifier, characterized in that the zeolite particles are filled by 10-12% based on the weight of the carbon block.
4. The method of claim 3,
The hollow fiber membrane filter (UF filter), a filter for a water purifier, characterized in that titanium dioxide particles are embedded.
delete delete The method of claim 1,
The carbon block is
A filter for a water purifier, characterized in that it is prepared by mixing 24-28 wt% of a binder.
The method of claim 1,
The titanium dioxide filter for a water purifier, characterized in that it is manufactured by mixing about 3% based on the weight of the carbon block.
A water purifier comprising at least one water purifier filter to generate purified water from raw water,
The water purifier filter is a water purifier, characterized in that it comprises the filter for a water purifier selected from any one of claims 1 to 8 and 11 to 12.

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