KR20150007128A

KR20150007128A - filter for a water purifier and the water purifier including the same

Info

Publication number: KR20150007128A
Application number: KR1020130081134A
Authority: KR
Inventors: 박종훈; 이상덕; 윤창환
Original assignee: 엘지전자 주식회사
Priority date: 2013-07-10
Filing date: 2013-07-10
Publication date: 2015-01-20

Abstract

The present invention relates to a filter for a water purifier. More specifically, the present invention relates to a heavy metal removing filter, capable of effectively removing heavy metals in water, for the water purifier, and to the water purifier including the same filter. According to an embodiment of the present invention, a front end activated carbon filter for producing purified water from raw water, a UF hollow fiber membrane filter, and a rear end activated filter are connected in order in the water purifier. A material for the rear end activated carbon filter includes a synthetic iron hydroxide (α-FeOOH) for removing heavy metals in water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for a water purifier,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for a water purifier, and more particularly, to a heavy metal removal filter for a water purifier that can effectively remove heavy metals in water and a water purifier including the same.

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

In order to generate an integer, it is possible to pass through processes such as precipitation, filtration and sterilization, and it is general that harmful substances are removed through these processes.

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

The sediment filter may be a filter for precipitating large contaminants or suspended matters in raw water, and the activated carbon filter may be a filter for adsorbing and removing small contaminants, residual chlorine, volatile organic compounds, and odor generating factors .

Generally, two activated carbon filters may be provided. That is, a pre-activated carbon filter provided on the raw water side and a pre-activated carbon filter provided on the purified water side may be provided. The post-activated carbon filter may be provided to improve the taste of water by removing odor inducing substances that mainly affect the taste of purified water.

Both the UF hollow fiber membrane filter and the RO membrane filter are generally used selectively.

RO membrane filters can be used to effectively remove heavy metals, ionic substances and microorganisms by applying reverse osmosis membranes. However, such RO membrane filters are expensive and have a problem of discarding a large amount of raw water. In addition, there is a problem that minerals and components useful for the human body are also removed.

On the other hand, UF hollow fiber membrane filters can effectively remove ionic substances and microorganisms while maintaining the beneficial minerals in the human body. In addition, it is possible to minimize the raw water that is inexpensive and wasted as compared with the RO membrane filter. For example, only 40% of the raw water flowing into the RO membrane filter can be converted to an integer, and the raw water flowing into the UF hollow fiber membrane filter can be converted to a 100% integer.

However, there is a problem that it is difficult to effectively remove heavy metals through the UF hollow fiber membrane filter. Accordingly, there is a problem that it is difficult to provide a water purifier that can use tap water or ground water in a contaminated area as raw water.

In recent years, demand for water purifiers has increased significantly. Therefore, there are problems that various requirements are generated and it is difficult to satisfy at the same time.

For example, it is possible to remove heavy metals by applying an RO membrane filter, but it is difficult to secure the flow rate of purified water. That is, it takes a very long time to obtain a desired amount of purified water.

On the other hand, UF hollow fiber membrane filter can secure high flow rate, but it is difficult to use tap water in groundwater or contaminated area as raw water because it is difficult to remove heavy metals in water.

Therefore, removal of heavy metals and securing of high flow rate were inevitably regarded as contradictory problems. This is because it is difficult to obtain a high flow rate when RO membrane filter is used to remove heavy metals and heavy metal removal is difficult when UF hollow fiber membrane filter is used to secure high flow rate.

The present invention basically aims to solve the problem of the conventional water purifier described above.

It is an object of the present invention to provide a water purifier having a compact and slim water purifier and a high performance filter.

According to an embodiment of the present invention, there is provided a water purifier filter and a water purifier which can secure a high flow rate and are excellent in the removal of heavy metals in water.

According to one embodiment of the present invention, there is provided a water purifier capable of using tap water or ground water in a contaminated area as raw water.

According to one embodiment of the present invention, there is provided a water purifier capable of securing a high flow rate, removing heavy metals in water, and effectively removing chloroform without changing the structure or piping of a conventional water purifier.

A filter for a water purifier and a water purifier capable of reducing the time and cost required for the manufacturing process through an embodiment of the present invention.

According to one embodiment of the present invention, there is provided a water purifier having a high flow rate and excellent removal of heavy metals.

According to an aspect of the present invention, there is provided a filter device comprising: a filter housing having an inlet and an outlet; And a filter module provided in the filter housing for purifying water supplied through the inlet port to supply the purified water to the outflow port. In order to remove heavy metals in the water, the material of the filter module is a synthetic iron hydroxide (? FeOOH) compound A filter for a water purifier can be provided.

The synthetic iron hydroxide compound is represented by the following formula (1)

(One)

Lt; / RTI > The synthetic iron hydroxide compound is represented by the following formula (2)

(2)

It is preferable to remove the heavy metal (A) in the water through the chemical reaction according to the chemical reaction.

The synthetic iron hydroxide compound may be beoxide E 33.

Preferably, the filter module material comprises granular or powdered activated carbon. Therefore, it is possible to effectively remove heavy metals as well as chloroform in water through the filter.

The synthetic iron hydroxide compound is in powder or granular form, and the synthetic iron hydroxide compound and the activated carbon can be filled in the filter module.

The filter module may include a filter block, and the filter block may further include a binder for connecting the synthetic iron hydroxide compound and activated carbon to each other to impart rigidity thereto.

The synthetic hydro iron oxide compound in the filter block is preferably less than 30 wt%, and the activated carbon is preferably 30 wt% or more. Specifically, the synthetic hydro iron oxide compound in the filter block is preferably 10 wt% or more and less than 30 wt%, and the activated carbon is preferably 33 wt% or more and less than 53 wt%.

The binder material is preferably polyethylene. The polyethylene in the filter block is preferably 34 to 40% by weight. More specifically, the polyethylene in the filter block is preferably 37% by weight. Therefore, it is possible to effectively increase the ratio of the synthetic hydro iron oxide compound and the activated carbon associated with the purified water, while effectively performing the binder function.

According to an aspect of the present invention, there is provided a water purifier in which a shear activated carbon filter, a UF hollow fiber membrane filter, and a rear end activated carbon filter are sequentially connected to generate purified water from raw water, As the material of the activated carbon filter, a water purifier including activated carbon for removing chloroform in water and synthetic iron hydroxide (? -FeuOH) compound for removing heavy metals in water may be provided.

Preferably, the water purifier is a direct water type water purifier in which the purified water directly flows out from the external water source. Therefore, it is possible to satisfy the effect of removing heavy metals and at the same time to secure an effective flow rate of purified water.

In the filter material, the weight percentage of the activated carbon and the synthetic iron hydroxide compound is preferably determined in consideration of the flow rate condition and the criteria for the chloroform removal condition.

It is preferable that the weight percentage of the synthetic iron hydroxide compound in the material of the rear end activated carbon filter is determined so as to satisfy a removal rate of 90% or more with respect to mercury, lead, hexavalent chrome, arsenic, selenium, iron and aluminum.

The increase in the weight percentage of the synthetic iron hydroxide compound for heavy metal removal shows a decrease in the purified water flow rate. In addition, the decrease in weight percent of the synthetic iron hydroxide compound indicates a decrease in the heavy metal removal effect. Therefore, in order to sufficiently carry out the heavy metal removal effect, the weight percentage of the synthetic iron hydroxide compound is preferably 10% by weight or more.

The synthetic iron hydroxide compound may be beoxide E 33.

The rear end activated carbon filter or the front end activated carbon filter may include a filter housing having an inlet and an outlet; And a filter block provided in the filter housing for supplying purified water to the outlet through the inlet.

Preferably, the filter block is formed in a hollow cylindrical shape and includes the activated carbon and a synthetic iron hydroxide compound. Therefore, the rear end activated carbon filter or the front end activated carbon filter may be a filter for removing heavy metals. Of course, both can be heavy metal removal filters, and either one can be a heavy metal removal filter.

Preferably, the filter block includes a binder that connects the activated carbon and the synthetic iron hydroxide compound to each other to impart rigidity thereto.

The synthetic hydro iron oxide compound in the filter block is preferably less than 30 wt%, and the activated carbon is preferably 30 wt% or more.

Preferably, the material of the binder is polyethylene, and the polyethylene in the filter block is 34 to 40 wt%.

In order to achieve the above object, according to an embodiment of the present invention, there is provided a water purifier in which a shear activated carbon filter, a UF hollow fiber membrane filter, and a rear end activated carbon filter are sequentially connected to generate an integer from raw water, The filter material of the rear end activated carbon filter includes synthetic iron hydroxide (? FeOOH) compound for removal of activated carbon and water heavy metal, and the amount of the synthetic iron hydroxide compound in the rear end activated carbon filter and the amount of the synthetic hydroxy iron compound The water purifier can be provided.

It is preferable that the amount of the synthetic iron hydroxide compound in the rear end activated carbon filter is larger than the amount of the synthetic iron hydroxide in the front end activated carbon filter.

According to an embodiment of the present invention, a water purifier having a high performance filter performance can be provided, while providing a compact and slim water purifier.

According to one embodiment of the present invention, it is possible to provide a filter for a water purifier and a water purifier that can secure a high flow rate and are excellent in heavy metal removal performance in water.

According to an embodiment of the present invention, it is possible to provide a water purifier that can use tap water or ground water in a contaminated area as raw water.

According to one embodiment of the present invention, it is possible to provide a water purifier capable of securing a high flow rate, removing heavy metals in water, and effectively removing chloroform without changing the structure or piping of a conventional water purifier.

According to one embodiment of the present invention, it is possible to provide a filter for a water purifier and a water purifier which can reduce the time and cost required for the manufacturing process.

According to one embodiment of the present invention, it is possible to provide a direct water-type purifier excellent in the removal of heavy metals with high flow rate.

1 is a perspective view illustrating an example of a water purifier according to an embodiment of the present invention;
FIG. 2 is a piping construction diagram showing an example of piping configuration of the water purifier shown in FIG. 1; FIG.
3 is a cross-sectional view of a filter according to one embodiment of the present invention;
FIG. 4 is an example of a conjugate bonding equation showing the principle of heavy metal removal of a heavy metal removal material in the filter of FIG. 3;
FIGS. 5 and 6 are graphs showing the flow rates according to the weight percentages of the heavy metal removal material in the filter of FIG. 3;
FIGS. 7 and 8 are graphs showing the chloroform removal ratio according to the weight percentage of the heavy metal removal material in the filter of FIG. 3; And
9 is a table showing the effect of removing heavy metals in the filter of Fig.

Hereinafter, a filter for a water purifier and a water purifier according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 shows an example of a water purifier which can be applied to the embodiment of the present invention.

The vacuum cleaner 10 includes a cabinet 11 and a dispenser 12 which form an outer appearance. Here, the dispenser 12 means a space where a user is supplied with drinking water. Therefore, generally, the dispenser 12 is formed in front of the cabinet 11. Of course, such a dispenser 12 can be formed in the form of a recessed or recessed space in front of the cabinet 11. In some cases, it may be formed in a protruding shape in front of the cabinet 110. Therefore, a part of the cabinet 11 can form the dispenser 12.

The dispenser 12 is provided with a cock 15 through which drinking water is discharged, and a lever 16 for operating drinking water may be provided. That is, when the user operates the lever 16, the drinking water can be discharged from the cock 15. Here, the operation of the lever 16 may be in the form of pushing or pulling the lever.

Specifically, the user lifts the cup 1 so that the upper portion of the cup 1 is positioned below the cock 15, and the cup 1 can be pushed while the cup 1 is in contact with the lever 16. According to the operation of the lever 16, the drinking water can be discharged from the cock 15 and stored in the cup 1.

The user can drink the water stored in the cup 1 and throw the remaining water into the tray 13. [ Of course, a small amount of residue falling from the cock 15 can also be stored in the tray 13. [ Therefore, generally, the tray 13 is positioned directly below the cock 15. That is, below the dispenser 12. Accordingly, the space between the upper portion of the tray 13 and the cock 15 may be referred to as a dispenser 12.

As described above, the drinking water may be either purified water, cold water or hot water. Of course, it may be various forms of beverage. Accordingly, a user interface 14 for selecting the drinking water to be discharged can be provided.

For example, the user may select cold water through the user interface 14. [ Then, after the cup 1 is positioned below the cock 15, the lever 16 can be pushed. By this operation, the cold water is discharged from the cock 15 and the cup 1 is filled.

As described above, the general drinking water supply device is provided such that drinking water is supplied by a user's operation such as the operation of the lever 16. [ That is, it can be widely used for the purpose of supplying a small amount of drinking water to a container such as the cup 1.

Hereinafter, an example of the piping configuration of the above-described water purifier described with reference to Fig. 2 will be described.

As shown in FIG. 2, the raw water flowing into the water purifier 100 through the external water supply source 20 can be converted into an integer through the filter 30. The configuration of the filter 30 may be variously modified, and the filter 30 may be configured by a plurality of single filters. In FIG. 2, three single filters are connected in series to form the filter 30. However, the present invention is not limited thereto.

Specifically, the filter 30 may include a pre-carbon filter 31, a UF filter 32, and a post-carbon filter 33. Of course, other types of filters, such as a sediment filter, may be added in some cases. In addition, the filter 30 may include a filter for removing heavy metals, as will be described later. Preferably, the post-carbon filter 33 may be a filter for removing heavy metals.

A constant flow valve (21) may be provided between the external water supply (20) and the front end of the filter (30). The amount of raw water (flow rate) can be supplied to the filter 30 stably even if the hydraulic pressure of the external water supply source 20 is varied through the constant flow valve 21. [

The purified water generated by the raw water can be discharged to the outside through the purified water pipe 40, the purified water supply valve 42 and the main cock 15. For this outflow, the operation of the lever 16 shown in Fig. 2 is required, and the water supply valve 42 is opened due to the operation of the lever 16 so that the water outflow can be performed.

Here, the purified water pipe 40 can always be opened when malfunction of the purified water supply valve 42 occurs. That is, when the malfunction of the purified water supply valve 42 occurs due to the pressure of the raw water supplied through the external water supply source 20, the purified water can be continuously flown out through the cock 15. Therefore, in order to ensure the stability of the system, it is preferable that a purified water valve 41 is provided between the rear end of the filter 30 and the front end of the purified water supply valve 42.

The water purifying valve 41 is basically opened to be able to exit through the main cock 15. However, as will be described later, the water purifying valve 41 may not always be opened for the outflow through the main cock 15. This is because, as will be described later, cold water or hot water can be dispensed not only at the room temperature but also through the main cock 15.

As described above, the water purifier can basically be an apparatus for generating and supplying an integer. However, it may be provided to supply cold water or hot water as well as an integer for user satisfaction. Such cold water or hot water can basically be generated using the above constants. That is, the cold water or the hot water may be an integer, and may additionally be an integer which is cooled or heated.

On the other hand, the water purifier may be a device for supplying only cold water or hot water using an integer. In this case, it is possible to omit piping configurations at the downstream end of the branch point C in the purified water pipe 40. [ In other words, it is possible to omit the piping configurations at the downstream end of the branch point C including the purified water supply valve 42. Of course, in this case, the cold water pipe 50 and the hot water pipe 60 to be described later should be provided.

As shown in FIG. 2, according to the embodiment of the present invention, a water purifier capable of supplying cold water can be provided. That is, it is possible to provide a water purifier capable of generating cold water by cooling the purified water and capable of leaving the cold water.

In order to generate cold water through the purified water, a cold water pipe 50 may be provided, and the cold water pipe 50 may be connected to the purified water pipe 40.

The cold water pipe (50) may be branched from the purified water pipe (40). At this time, the cold water pipe 50 may be branched from the branch point B of the purified water pipe 40. That is, purified water bypassed from the purified water pipe 40 can be converted into cold water while flowing through the cold water pipe 50. The cold water pipe 50 may be provided up to a coke valve for discharging cold water. The coke valve may be a cold water supply valve 52 or a coke valve 151 separately provided at a rear end of the cold water supply valve 52.

The purified water bypassed from the purified water pipe 40 can be converted into cold water while passing through the cooling channel 51 in detail. Therefore, the cold water pipe 50 may include the cooling passage 51.

The cooling passage 51 may be provided inside the cold water tank 55. The chiller (not shown) is provided in the cold water tank 55 to cool the inside of the cold water tank, and the cooling passage 51 inside the chilled water tank is cooled by the chiller. Therefore, the constant in the cooling passage 51 is converted to cold water.

On the other hand, in order to prevent freezing of the cooling passage 51 due to abrupt cooling, cooling water may be provided in the cold water tank. Therefore, much of the cooling channel 51 is immersed in the cold water tank filled with the cooling water.

A cooling water pipe 80 for supplying cooling water to the inside of the cold water tank may be provided. Through the cooling water pipe 80, cold water or purified water can be supplied as cooling water to the cold water tank.

The cooling water pipe 80 may be provided with a cooling water valve 81. When cooling water is required, the cooling water valve 81 may be opened to allow the cooling water to flow into the water cooling water tank 55. In order to use the purified water as the cooling water, the cooling water pipe 80 may be branched from the purified water pipe 40. For example, at the branch point C of the purified water pipe 40, the cooling water pipe 80 may be branched. The division point C may be either the front end or the rear end of the division point B.

Meanwhile, the cold water tank 55 may be connected to a drainage passage 87 for limiting the supply of the cooling water and a drainage passage 85 for replacing the cooling water. The cooling water may be periodically drained and periodically filled. Therefore, the drainage passage 85 may be provided with a drain valve 86.

When the user presses the lever to exit the cold water, cold water is discharged from the main cock 15. For this cold water outflow, the water purification valve 41 and the cold water supply valve 52 can be opened, through which cold water is discharged. Accordingly, the cold water supply valve 52 performs a function of selectively opening and closing the cold water pipe 50.

FIG. 2 shows an embodiment in which cold water and purified water are discharged through a main cock 15, which is a single cock. To this end, a main cock valve 151 may be provided at the rear end of the purified water supply valve 42 and the cold water supply valve 52. The main cock valve 151 may be a single coke valve. In this case, the single coke valve performs two functions as an integral coke valve and a cold water coke valve.

The main cock valve 151 may be connected to the distribution pipe 90. The distribution pipe 90 may be connected to the purified water pipe 40 and the cold water pipe 50, respectively. A cold water supply valve (52) and a purified water supply valve (42) may be provided at the front end of the distribution pipe (90). A main cock valve 151 may be provided at a rear end of the distribution pipe 90.

More specifically, the distribution pipe 90 may be connected to at least one of the purified water pipe 40, the cold water pipe 50, and the hot water pipe 60. Water exiting through these pipes can be introduced into the distribution pipe 90.

Accordingly, the distribution pipe 90 may have a plurality of inlet ports and at least one outlet port, and each of the inlet port and the outlet port may be connected to the valve. To this end, the distribution line 90 may comprise a single body assembly having a plurality of inlets and at least one outlet.

Accordingly, cold water or purified water can be supplied to the distribution pipe 90. When the main cock 15 is opened through the single main cock valve 151, cold water or purified water can be selectively supplied. For example, when the purified water supply valve 42 is opened and the single main cock valve 151 is opened, the purified water can be supplied through the main cock 15, which is a single cock. Further, when the cold water supply valve 52 is opened and the single main cock valve 151 is opened, cold water can be supplied through the single main cock 15.

Further, in this embodiment, it is possible to provide a water purifier capable of generating hot water using an integer and supplying hot water. A heating device 65 for generating such hot water may be provided.

As shown in FIG. 2, the hot water pipe 60 may be formed branched at the branch point A of the purified water pipe 40. A hot water valve 61 may be provided at the front end of the heating device 65. The hot water valve 61 may be provided to selectively supply purified water for generating hot water from the purified water pipe 40 to the heating device 65.

The purified water supplied from the purified water pipe 40 flows into the heating device 65 through the inlet of the heating device 65. Then, the water is converted into hot water through the heater 67 provided in the heating device 65. The hot water may flow into the hot water supply valve 62 through the outlet 69 of the heating device 65.

Therefore, the hot water can be taken out to the outside as the hot water supply valve 62 is opened. Of course, when a single main cock 15 is provided, the single main cock 15 can also be opened for hot water outflow.

In this embodiment, it is possible to provide a water purifier capable of selectively leaving purified water, hot water and cold water through a single main cock 15. Accordingly, the distribution pipe 90 may be provided as described above, and the distribution pipe 90 may be connected to the hot water pipe 60 as well. Accordingly, any one of the purified water, hot water, and cold water flowing into the distribution pipe 90 can be discharged to the outside due to the opening of the single main cock 15 through the single main cock valve 15. [

As described above, only the constants can be supplied through the purifier according to the present embodiment. In addition, a water purifier supplied with only cold water and hot water can be provided. In addition, a water purifier supplied with only cold water and purified water may be provided.

However, as shown in FIG. 2, it is most preferable to provide a water purifier capable of selectively supplying cold water, hot water, and purified water through the water purifier according to the present embodiment. This is because it can meet various user demands.

On the other hand, as described above, various forms of heading can be performed through the single main cock 15. That is, at least one of hot water, cold water and normal temperature water can be taken out through one coke. Further, depending on the temperature of the outgoing water, more various types of water may be introduced. For example, longevity constants and the like can also be made. This heading mode, that is, the heading mode, can be performed through the operation of the user interface 14 described above.

For example, the user may select the cold water mode via the user interface 14 and press the lever 16. [ In this case, cold water can be discharged through the main cock 15. That is, an integer of the selected type may be output through the main cock 15 according to the mode selected through the user interface 14. [

In the above description of the piping, the branch may be a branch of the pipe or the flow path itself, and may include a branch through a fitting.

Hereinafter, a filter for a water purifier according to an embodiment of the present invention will be described in detail with reference to FIG. For convenience of explanation, the case where the filter is the post-carbon filter 33 is taken as an example.

As shown, the filter 33 comprises an inlet 36 and an outlet 37. And an outlet 37 through which the water introduced through the inlet 36 is purified and discharged. Accordingly, it can be said that the water or raw water flows between the inlet 36 and the outlet 37 and purified.

The filter (33) may comprise a housing (34, 35). That is, it may include a housing forming an internal space. Therefore, the inlet 36 and the outlet 37 may be formed in the filter housing 34, 35. Water is introduced into the housings (34, 35) through the inlet (36), and purified water can be discharged through the outlet (37) to the outside of the housing.

Specifically, the housing 34, 35 may include a body 34 and a cover 33. The cover 33 may be coupled to the upper portion of the body 34 to form an internal space isolated from the outside. The internal space may communicate with the outside through the inlet 36 and the outlet 37.

More specifically, the inlet (36) and the outlet (37) may be provided in the cover (33). Therefore, it is very easy to mount and replace the filter due to the position of the inlet and outlet, assuming that the filter must be replaced periodically.

The purified water flowing into the housings (34, 35) is purified while passing through the filter module (38). In other words, harmful substances contained in water or raw water can be removed through the filter module 38 and purified.

According to the present embodiment, it is possible to provide a heavy metal removal filter for a water purifier excellent in the removal effect of heavy metals in water and a water purifier including the same. For this purpose, it is preferable that the material of the filter module includes a synthetic iron hydroxide (? FeOOH) compound.

The filter module is preferably a filter module in which water is penetrated by a pressure difference between a front end and a rear end. This means that the purified water flowing into the housing can be discharged to the outside of the housing through the filter module 38. That is, the purified water flowing into the housing through the single inlet port 36 is purified through the filter module 38 and discharged out of the housing through one outlet 937. Therefore, it becomes possible to secure a sufficient purified water flow rate together with the heavy metal removal effect.

The synthetic iron hydroxide (? - FeOOH) compound may contain a functional group represented by the following formula (1).

(One)

That is, a plurality of Fe may ionically bond with a hydroxyl group (OH), and each Fe (Fe) may include a functional group ionically or covalently bonded to one oxygen (O).

As an example of such a synthetic iron hydroxide compound, trade name Beoxide E 33 available from LanXess can be used.

The synthetic iron hydroxide compound can remove heavy metals in water through a chemical reaction formula represented by the following formula (2).

(2)

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

Through the chemical reaction between the water-soluble heavy metal compound and the synthetic iron hydroxide compound, water and hydroxide ion are generated. In addition, the heavy metal A has a strong ionic or covalent bond with the synthetic iron hydroxide compound. Therefore, the removed heavy metal can be prevented from again dissolving in water. The purified water from which the heavy metal is removed through the filter module flows out of the filter housings (34, 35) through the outlet (37).

As shown in FIG. 9, according to this embodiment, it can be seen that there is an excellent heavy metal removal effect. When the performance criterion of heavy metal removal rate is 90%, the performance is satisfied in all seven heavy metals.

That is, it can be seen that a removal rate of at least 94% can be achieved even when the concentration of heavy metals is different for mercury, lead, hexavalent chrome, arsenic, selenium, iron and aluminum.

This heavy metal removal effect is very effective. This is because, as will be described later, a sufficient flow rate of purified water can be ensured and at the same time, this heavy metal removal effect can be achieved. Thus, it is possible to effectively remove heavy metals while achieving a sufficient purified flow rate that can not be expected in conventional RO membrane filters.

The synthetic iron oxide compound may be formed in the form of a granule or a powder and may be filled in the filter module 38 or the filter housings 34 and 35. Accordingly, the water in which the heavy metal is dissolved can be removed through the filter module or the filter housing.

On the other hand, in general, the water purifier filter configuration includes a free (front end) carbon filter 31, a UF hollow fiber membrane filter 32 and a post (rear end) carbon filter 33, And a post-carbon filter 33 as a basis. In addition, it is general that only one of the UF hollow fiber membrane filter 32 and the RO membrane filter is used.

Increasing the number of filters means that the improvement of the water purification performance can be expected, but the flow rate of the purified water is reduced. Thus, it may not be desirable for the above-described filter for heavy metal removal to be further added to a general filter configuration.

Also, existing water purifiers have limited space in which the filter arrangement can be located, so adding a new filter may not be easy.

Similarly, it is not preferable to omit the conventional filter, for example, the UF hollow fiber membrane filter 32 for adding the filter for removing the heavy metal. This is because each of the filter configurations basically has a separate function for improving the water purification performance.

In order to solve such a problem, a heavy metal removal filter as a carbon filter may be provided in this embodiment. This makes it possible to satisfy the filter configuration of the basic water purifier and to prevent the decrease in the flow rate of the purified water due to the increase in the number of filters. In addition, not only the heavy metal removal effect but also the inherent functions and effects as a carbon filter can be expected.

Specifically, either the free (shear) carbon filter or the post (rear end) carbon filter may be a heavy metal removal filter. Of course, both can be heavy metal removal filters. In other words, in this embodiment, a heavy metal removal filter based on a carbon filter and a water purifier including the same can be provided. However, for the sake of convenience, a post-carbon filter as a heavy metal removal filter will be described.

For this purpose, it is preferable that the material of the filter module 38 in the post-carbon filter includes activated carbon. The activated carbon may be contained in granular or powder form. Therefore, basically, the filter module 38 can effectively remove residual chlorine components as well as removal of heavy metals in water. In addition, it is possible to improve the water taste, which is the greatest feature of the post carbon filter.

The synthetic iron oxide compound and the activated carbon may be uniformly mixed with each other and then filled into the filter module or the filter housing. However, such a filling operation requires a lot of working time and can not be said to be an easy task. Therefore, it is preferable that the filter module is formed in a block shape and positioned inside the housing (34, 35). That is, it may be desirable to form the filter block 38a having rigidity so that water passes through the filter block 38a.

In particular, the filter module 38 may include a filter block 38a and a hollow 38b. That is, the hollow 38b may be formed in the cylindrical filter block 38a. Supports 38c and 38d for fixing the filter block 38a may be provided on the upper portion and / or the lower portion of the filter block 38a.

Accordingly, after the entire filter block is inserted into the housing body 34, the cover 35 can be engaged with the housing body 34. [ Therefore, the complicated filling process is omitted and the manufacture of the filter becomes very easy.

On the other hand, the filter block 38a enables uniform distribution of the material throughout the filter. That is, it is possible to prevent the position of the various materials from changing over time. Therefore, it becomes possible to achieve a uniform water purification effect as a whole irrespective of the specific position.

3, the purified water flowing from the circumferential surface of the filter block 38a passes through the inside of the filter block 38a, reaches the hollow 38b, and exits to the outlet 37. As shown in FIG. Here, it can be assumed that the filter module 38 is simply filled with a synthetic iron oxide compound and activated carbon. If the specific gravity of the synthetic iron oxide compound is higher than the specific gravity of the activated carbon, the synthetic iron oxide compound may be driven to the lower portion of the filter housing body 34 over time. Therefore, there is a fear that the filter function as a whole can not be performed uniformly. Therefore, it is possible to secure a uniform filter function through the filter block having rigidity.

As described above, it has been explained through the embodiment of the present invention that a heavy metal removal effect, a sufficient water flow rate, and a function of a free carbon filter can be secured.

However, it can be said that it is very difficult to produce a filter block having rigidity through a synthetic iron oxide compound and activated carbon. Therefore, it is preferable that the material of the filter module includes a binder which connects the synthetic iron oxide compound and activated carbon to each other to give rigidity. Here, the binder may function to make the filter module become one rigid body rather than improving the water purification performance.

On the other hand, the weight percentages of the materials of the filter module 38 having such rigidity can be considered as very important. In particular, the weight percent of the synthetic iron oxide compound and the weight percent of activated carbon in the filter block 38a performing the filter may be very important factors.

For example, an increase in weight percent of the synthetic iron oxide compound means a decrease in the flow rate of purified water, which means a reduction in weight% of the activated carbon. This reduction in the weight% of activated carbon means that the performance of the free carbon filter is reduced, and in particular, the removal performance of chloroform (CHCL ₃ ) is lowered. Therefore, it is preferable that the weight percentages of the synthetic iron oxide compound and the activated carbon are determined in consideration of the criteria for the constant flow rate condition and the chloroform removal condition.

On the other hand, the range of the weight percentage of the binder which imparts stiffness to the filter block 38a is inevitably limited. This is because, if the weight% of the binder is small, it is difficult to ensure sufficient rigidity and the binder may not be combined with the synthetic iron oxide compound and the activated carbon as a whole. In addition, if the weight percentage of the binder is large, the above problem can be solved, but there is a problem that it is difficult to secure the water purification performance and the flow rate due to the increase of unnecessary materials.

Therefore, according to this embodiment, the weight percentage of the binder is 34 to 40 wt%, preferably 37 wt%. Such a binder may be polyethylene.

Hereinafter, when the weight% of the binder is substantially 37%, the water flow rate and chloroform removal performance according to the weight percentage change of synthetic iron oxide and activated carbon will be described.

5 and 6 are graphs showing the flow rate of purified water according to the weight% of the synthetic iron oxide compound. As shown in FIG. 5, when the weight percentage of the synthetic iron oxide compound is small, the purified water flow rate is satisfactory. However, it can be seen that the flow rate is reduced to less than 1.5 L / min when the cumulative flow rate reaches 30% by weight and reaches 3500 L. As shown in FIG. 6, when the synthetic iron oxide compound is 50% by weight, the purified water flow rate becomes smaller as the purified water flow rate is substantially less than 0.9 L / min and the cumulative flow rate increases.

Therefore, it is preferable that the synthetic iron oxide compound is less than 30% by weight through FIG. 5 and FIG. In addition, the synthetic iron oxide compound is preferably 10% by weight or more in order to provide sufficient heavy metal removal effect.

7 and 8 are graphs showing the chloroform removal performance according to the weight% of activated carbon.

As shown in FIG. 7, when the weight percentage of activated carbon is 30% by weight, it is understood that the removal standard is 80% even when the chloroform removal rate is 3000L. However, it can be seen that the removal rate gradually approaches 80%. Of course, when the weight percentage of activated carbon is smaller than 30, the chloroform removal performance will be further lowered. Therefore, it can be seen from FIG. 6 that the weight percentage of activated carbon is preferably more than 30%.

As shown in FIG. 8, when the weight percentage of activated carbon increases to 50, the chloroform removal performance is further increased.

As shown in FIGS. 5 to 8, the synthetic iron hydroxide compound is preferably less than 30% by weight in consideration of securing the flow rate of purified water, and preferably 30% by weight or more, more preferably 33% by weight or more, More desirable. In order to secure the removal of heavy metals, it is preferable that the synthetic iron hydroxide compound is 10 wt% or more.

Therefore, it becomes possible to simultaneously remove the heavy metal, secure the flow rate of the purified water, and remove the chloroform through the composition ratio (% by weight) of the synthetic iron hydroxide compound, the activated carbon and the binder.

In addition, it is possible to provide a filter having a filter block shape, which is very easy to manufacture and handle, and a water purifier including the same.

On the other hand, the filter block can be formed by mixing the above-mentioned materials uniformly and then heating them in a mold. By heating in the mold, the binder, for example polyethylene, is melted and the synthetic hydroxy iron chemistry and activated carbon are bound to the polyethylene. Therefore, a filter block having overall rigidity can be formed.

In the above-described embodiments, the synthetic iron hydroxide compound for heavy metal removal is basically included in the rear end activated carbon filter. Of course, the synthetic iron hydroxide compound may be included in the shear activated carbon filter or both.

The shear activated carbon filter is provided at the front end of the rear end activated carbon filter to remove contaminants of relatively large particles. Therefore, the replacement cycle of the shear activated carbon filter is generally faster than the replacement cycle of the rear end activated carbon filter.

In addition, as described above, it can be seen that the flow rate of the purified water decreases as the weight percentage of the synthetic iron hydroxide compound in the rear end activated carbon filter is increased. Therefore, there is a limit to increase the weight percentage of the synthetic iron hydroxide compound in one filter for effective removal of heavy metals.

In this embodiment, it is possible to provide a water purifier in which the synthetic iron hydroxide compound is applied to both the shear activated carbon filter and the post-stage activated carbon filter, taking into consideration that the activated carbon filter and the activated carbon filter use activated carbon as a raw material.

Therefore, the amount of the synthetic iron hydroxide compound in any one specific filter can be reduced while increasing the amount of the synthetic iron hydroxide compound in the entire filter portion. Therefore, it is possible to secure an effective flow rate of the purified water and to remove heavy metals. That is, the amounts of the synthetic iron hydroxide compounds can be the same or different from each other.

On the other hand, in consideration of the replacement period of the filter, and the inherent functions of the front end activated carbon filter and the rear end activated carbon filter, it may be preferable to make the amounts of the synthetic iron hydroxide compounds different from each other. For example, the amount of the synthetic iron hydroxide compound in the shear activated carbon filter may be preferably less than the amount of the synthetic hydroxy iron compound in the rear end activated carbon filter. This is because, in general, the replacement cycle of the shear activated carbon filter is relatively short.

Therefore, it is possible to additionally remove heavy metals in addition to the inherent purification function in the shear activated carbon filter. In addition, since the amount of the synthetic iron hydroxide compound is relatively small, the flow rate of purified water can be secured. Similarly, heavy metal removal can be effectively performed together with the inherent purification function of improving the water taste in the rear end activated carbon filter. In addition, since the heavy metal is partially removed from the shear activated carbon filter, effective heavy metal removal is possible even if the amount of the synthetic iron hydroxide compound is relatively small.

As a result, it is possible to secure the flow rate of purified water and effectively remove heavy metals by applying both effective and unnecessary synthetic hydroxides to both the front and rear activated carbon filters. Of course, inherent integer functions can also be performed effectively.

30: filter 31: free carbon filter
32: UF filter 33: Post carbon filter (heavy metal removal filter)

Claims

A filter housing having an inlet and an outlet; And
And a filter module provided in the filter housing for supplying purified water to the outlet through the inlet,
In order to remove heavy metals in water, the material of the filter module includes a synthetic iron hydroxide (? FeOOH) compound.

The method according to claim 1,
The synthetic iron hydroxide compound is represented by the following formula (1)

(One)
And the functional group of the water purifier.

3. The method of claim 2,
The synthetic iron hydroxide compound is represented by the following formula (2)

(2)
Wherein the heavy metal (A) in the water is removed through a chemical reaction according to the chemical reaction.

The method of claim 3,
Wherein the synthetic iron hydroxide compound is beoxide E 33.

5. The method of claim 4,
Characterized in that, in order to remove water chloroform, the filter module comprises granular or powdered activated carbon.

6. The method according to any one of claims 1 to 5,
Wherein the synthetic iron hydroxide compound is in powder or granular form, and the synthetic iron hydroxide compound and the activated carbon are filled in the filter module.

6. The method according to any one of claims 1 to 5,
Wherein the filter module includes a filter block, and the filter block further comprises a binder for connecting the synthetic iron hydroxide compound and activated carbon to each other to impart rigidity thereto.

8. The method of claim 7,
Wherein the synthetic hydro iron oxide compound in the filter block is less than 30 wt%, and the activated carbon is not less than 30 wt%.

9. The method of claim 8,
Wherein the synthetic hydro iron oxide compound in the filter block is 10 wt% or more and less than 30 wt%, and the activated carbon is 33 wt% or more and less than 53 wt%.

8. The method of claim 7,
Wherein the binder material is polyethylene.

11. The method of claim 10,
Wherein the polyethylene in the filter block is 34 to 40 wt%.

12. The method of claim 11,
Wherein the polyethylene in the filter block is 37 wt.%.

A water purifier in which a shear activated carbon filter, a UF hollow fiber membrane filter, and a rear end activated carbon filter are sequentially connected to generate an integer from raw water,
Wherein the filter material of at least one of the shear activated carbon filter or the rear end activated carbon filter includes activated carbon for removing chloroform in water and synthetic hydroxy iron (α-FeOOH) compound for removing heavy metals in water.

14. The method of claim 13,
Wherein the water purifier is a direct water type water purifier in which the purified water is directly taken out by directly using the water pressure of the external water source.

15. The method of claim 14,
Wherein the synthetic iron hydroxide compound is beoxide E 33.

16. The method according to any one of claims 13 to 15,
Wherein the shear activated carbon filter or the post-
A filter housing having an inlet and an outlet; And
And a filter block provided in the filter housing for supplying purified water to the outlet through the inlet.

17. The method of claim 16,
Wherein the filter block is formed in a hollow cylindrical shape, and comprises the activated carbon and the synthetic iron hydroxide compound.

18. The method of claim 17,
Wherein the filter block includes a binder that connects the activated carbon and the synthetic iron hydroxide compound to each other to impart rigidity thereto.

19. The method of claim 18,
Wherein the synthetic hydro iron oxide compound in the filter block is less than 30 wt%, and the activated carbon is not less than 30 wt%.

20. The method of claim 19,
Wherein the material of the binder is polyethylene, and the polyethylene in the filter block is 34 to 40 wt%.

A water purifier in which a shear activated carbon filter, a UF hollow fiber membrane filter, and a rear end activated carbon filter are sequentially connected to generate an integer from raw water,
Wherein the filter material of the front end activated carbon filter and the rear end activated carbon filter includes a synthetic iron hydroxide (? FeOOH) compound for removing activated carbon and heavy metals in water, and the amount of the synthetic iron hydroxide compound in the rear end activated carbon filter Wherein the amounts of the synthetic iron hydroxide compounds are different from each other.

22. The method of claim 21,
Wherein the amount of the synthetic iron hydroxide compound in the rear end activated carbon filter is larger than the amount of the synthetic iron hydroxide compound in the front end activated carbon filter.