KR101744615B1 - Complex filter - Google Patents

Abstract

The present invention relates to a crystallization catalyst filter unit for promoting a reaction between a hard or scaly material present in raw water and a bicarbonate anion and removing a hard or scaled material from the raw water through crystallization; And an ion exchange resin filter portion formed on the downstream side of the crystal generation catalyst filter portion to filter the raw water that has passed through the crystal generation catalyst filter portion and to remove the hard or scaled material from the raw water through ion exchange A composite filter is provided.

Description

COMPLEX FILTER

The present invention relates to a composite filter made to remove a hard or scaled material from raw water.

Water hardness means that the amount of calcium ions and magnesium ions contained in water is converted into the amount of calcium carbonate (calcium carbonate, CaCO ₃ ) corresponding thereto (unit: mg / l). The hardness of water is known to affect the taste of water. If the water hardness is higher than the standard, it is classified as hard water. The World Health Organization (WHO) guidelines further classify hard water and training standards.

The hard material reacts at a temperature higher or lower than room temperature to form a scale. Scale (for example, CaCO ₃ ) refers to a substance that is formed by the accumulation of minerals remaining in water after evaporation of water. The scale produced at the outlet of the water system, such as a refrigerator or water purifier, is required to prevent scale generation because the scale is perceived by the consumer as a failure or degradation of the water system.

Also, in a water cleaning system such as a washing machine or a dishwasher, a hard material is combined with an anion of a detergent to cause deterioration of the detergent and to generate a non-detergent detergent, so that the hardness of the material is removed from the hard water, It is necessary.

It is an object of the present invention to propose a composite filter capable of removing a hard or scaling substance present in water, including an ion exchange resin and a crystal formation catalyst.

Another object of the present invention is to propose a composite filter capable of effectively removing a hard substance or a scale-inducing substance by complementing the disadvantages of an ion exchange resin and a disadvantage of a crystal formation catalyst.

Another object of the present invention is to propose a composite filter having an ion exchange resin and a channel structure capable of improving the removal performance of a hard substance or a scale inducing substance of a crystal formation catalyst.

Another object of the present invention is to propose a composite filter capable of improving the performance of the crystal formation catalyst in consideration of the relationship between flow rate and filtration performance.

In order to accomplish the object of the present invention, a composite filter according to an embodiment of the present invention promotes the reaction of hydrocarbons anions with a hard or scaly material present in raw water, A crystal generating catalyst filter portion made to remove the gaseous substance or the scale-generating substance; And an ion exchange resin filter portion formed on the downstream side of the crystal generation catalyst filter portion to filter the raw water that has passed through the crystal generation catalyst filter portion and to remove the hard or scaled material from the raw water through ion exchange .

According to one embodiment of the present invention, the crystal generation catalytic filter section includes a plurality of crystal generation catalysts, and the crystal generation catalyst is a catalyst for promoting the reaction of calcium cations and bicarbonate anions present in the raw water, To accelerate the reaction of the magnesium cation and the bicarbonate anion to crystallize the hard material or the scale material.

According to another embodiment of the present invention, the crystal generation catalyst filter unit includes a plurality of crystal generation catalysts, and the crystal generation catalyst includes: a carrier made of a polymer having a negative charge; And a crystal seed present in the crystallization site of the carrier and containing at least one of calcium and magnesium.

According to another embodiment of the present invention, the crystal generation catalyst filter unit may have a flow path structure in which raw water flows upward from below, and the ion exchange resin filter unit may have a flow path structure in which raw water drops from top to bottom.

According to another embodiment of the present invention, the composite filter includes: a housing formed to receive the crystal generation catalyst filter portion and the ion exchange resin filter portion; And a pre-filter portion disposed to face the inner circumferential surface of the housing and configured to remove at least one of particulate matter, organic matter, and residual chlorine present in the raw water, wherein the crystal generation catalyst filter portion includes: A first case formed to receive raw water and forming a boundary with the pre-filter unit; And a plurality of crystal generation catalysts injected into the first case, wherein the ion exchange resin filter unit is formed such that the raw water that has passed through the crystal generation catalyst filter unit flows in, and the boundary with the crystal generation catalyst filter unit A second case for forming the first case; And a plurality of ion exchange resins injected into the second case.

A spiral protrusion may be formed on the inner wall surface of the first case.

A plurality of protrusions may be formed on the inner wall surface of the first case, and the plurality of protrusions may be spaced apart from each other along the direction in which the raw water flows in the crystal generation catalyst filter portion.

The lower end of the crystal generation catalyst filter portion may be spaced apart from the inner bottom surface of the housing, and the composite filter may be formed such that raw water having passed through the prefilter portion carries into the flow path structure of the crystal generation catalyst filter portion.

Wherein the upper end of the crystal generation catalyst filter portion and the upper end of the ion exchange resin filter portion are spaced apart from the inner upper end surface of the housing so that raw water having passed through the crystal generation catalyst filter portion falls into the flow path structure of the ion exchange resin filter portion .

Wherein the composite filter includes an outflow channel formed between an outer wall surface of the first case and an outer wall surface of the second case, the lower end of the ion exchange resin filter portion being spaced from an inner bottom surface of the housing, And the raw water having passed through the ion exchange resin filter unit may be discharged through the outflow channel.

According to another embodiment of the present invention, the composite filter includes: a housing formed to receive the crystal generation catalyst filter portion and the ion exchange resin filter portion; And a pre-filter portion disposed to face the inner circumferential surface of the housing and configured to remove at least one of particulate matter, organic matter and residual chlorine present in the raw water, wherein the crystal generation catalyst filter portion has a plurality of crystal generation catalysts Wherein the ion exchange resin filter portion comprises a first block and a second block having a plurality of ion exchange resins.

Wherein one of the first block and the second block is formed so as to surround the other of the first block and the second block, and the flow path structure of the composite filter may be such that raw water is sequentially filtered by the first block and the second block.

According to the present invention having such a constitution, since the crystallization catalyst accelerates the crystallization of the hard substance or the scale-inducing substance and the ion exchange resin performs the ion exchange with the hard substance or the scale induction, Or scale-inducing materials. Accordingly, the present invention can lower the hardness of water.

The crystal-forming catalyst has an advantage that it has a much longer life than an ion-exchange resin. However, it has a disadvantage that the reaction rate is slower than that of an ion-exchange resin and the hard or scaled material present in water can not be completely removed. However, the ion exchange resin of the present invention is disposed on the downstream side of the crystal formation catalyst to remove the hard or scaled material that does not undergo filtration in the crystal formation catalyst, so that the disadvantage of the crystal formation catalyst can be compensated.

The ion exchange resin has an advantage that the reaction rate is faster than that of the crystal formation catalyst, but has a disadvantage that regeneration is required due to a short life time compared with the crystal formation catalyst. However, since the crystal-forming catalyst of the present invention is disposed on the upstream side of the ion exchange resin to remove the hard substance or the scale-inducing substance, the load applied to the ion exchange resin can be reduced and a frequent regeneration is required .

Since the crystal-forming catalyst complements the disadvantages of the ion-exchange resin and the ion-exchange resin compensates for the disadvantage of the crystal-forming catalyst, the composite filter of the present invention having the crystal-forming catalyst and the ion- . ≪ / RTI >

The present invention also proposes a flow path structure capable of maximizing the advantages of a crystal formation catalyst and an ion exchange resin.

The present invention has a structure that can be separated naturally from the crystal generating catalyst after the hard substance or the scale provoking substance is crystallized by the crystal generating catalyst. The structure in which the crystals are separated naturally allows the crystal-forming catalyst to participate again in the other reaction, so that the performance of the entire composite filter is improved. Of course, the crystal-forming catalyst can continuously filter the hard- or scale- have.

The present invention has a flow path structure in which an ion exchange resin can stably adsorb a hard substance or a scale substance. Through stable adsorption, the ion exchange resin can remove most of the non-filtered hardness or scale-inducing material in the crystal formation catalyst.

Further, the present invention proposes a configuration in which turbulence is formed by using protrusions so that the crystal generation catalyst can have a sufficient filtration performance in a proper flow range of other filters to be connected in series with the composite filter. The present inventors have proposed a complementary structure in which the crystal forming catalyst has a sufficient filtration performance in a proper flow rate range of other filters, while the optimum flow rate at which the crystal generating catalyst exhibits the optimum performance is different from that of the other filters. The filtration performance of the entire filtration system including the filtration system can be improved. In addition, the complementary structure does not deviate from the tendency to miniaturize and simplify the filtration system.

1 is a cross-sectional view of a composite filter according to a first embodiment of the present invention.
Fig. 2 is a concept showing the mechanism of the crystal generating catalyst.
FIG. 3A is a concept showing the mechanism of the ion exchange resin.
3B is a concept showing the regeneration of the ion exchange resin.
Fig. 4 is a graph showing an experimental comparison between a crystal generating catalyst and an ion exchange resin.
5 is a cross-sectional view of a composite filter according to a second embodiment of the present invention.
FIG. 6 is a concept diagram illustrating the construction of a two-stage filtration system by connecting the composite filter of the present invention and other filters in series.
FIG. 7 is another concept of a two-stage filtration system in which a composite filter of the present invention and other filters are connected in series.
FIG. 8 is a concept diagram illustrating the construction of a three-stage filtration system by connecting the composite filter of the present invention and other filters in series.
FIG. 9 is another concept in which a composite filter of the present invention and other filters are connected in series to constitute a three-stage filtration system.

Hereinafter, a composite filter according to the present invention will be described in more detail with reference to the drawings. In the present specification, the same reference numerals are given to the same components in different embodiments, and the description thereof is replaced with the first explanation. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

1 is a cross-sectional view of a composite filter 100 according to a first embodiment of the present invention.

The pre-filter unit 110 is configured to remove at least one of particulate matter, organic matter, and residual chlorine present in the raw water. The pre-filter unit 110 is disposed on the upstream side of the crystal generation catalyst filter unit 120. The upstream side and the downstream side are concepts of relative positions based on the flow of water. It is described that the pre-filter unit 110 is formed on the upstream side of the crystal generation catalyst filter unit 120 when water passes first through the pre-filter unit 110 and then through the crystal generation catalyst filter unit 120 . 1 shows that the pre-filter unit 110 is formed on the upstream side of the crystal generation catalyst filter unit 120.

The pre-filter unit 110 may include at least a part selected from the group consisting of a precipitation filter, an electrostatic adsorption filter, and a carbon block filter. The filters may include a nonwoven fabric and may be referred to as an incoming nonwoven filter. The mechanism of the pre-filter unit 110 and the type of the foreign matter to be filtered by the pre-filter unit 110 may vary depending on which filter the pre-filter unit 110 includes.

The pre-filter unit 110 is formed of hollow cylindrical or hollow polygonal columns. The hollow portion of the pre-filter unit 110 may be referred to as a hollow portion. The hollow portion is a region that accommodates the crystal generation catalyst filter portion 120 and the ion exchange resin filter portion 130.

The pre-filter unit 110 has an outer peripheral surface and an inner peripheral surface. The outer circumferential surface refers to the surface of the housing 150 facing the inner circumferential surface. The inner circumferential surface refers to the surface facing the crystal formation catalyst filter portion 120 disposed in the hollow portion. The pre-filter unit 110 is configured to filter the raw water flowing in the top-down direction. The arrows in Fig. 1 indicate the flow of the enemy water. The raw water is primarily filtered during the passage through the pre-filter unit 110.

The crystal generation catalytic filter section 120 is formed on the downstream side of the pre-filter section 110. 1 shows a configuration in which the crystal generation catalyst filter unit 120 is formed on the downstream side of the pre-filter unit 110. [

The crystal generation catalytic filter unit 120 is configured to promote the reaction of bicarbonate anions with the hard or scaling substances present in the raw water. The crystal generation catalytic filter unit 120 is configured to remove the hard or scaled material from the raw water through crystallization.

The crystal generation catalyst filter unit 120 includes a first case 121, a plurality of crystal generation catalysts 122, and a protrusion 123.

The first case 121 is formed so that raw water having passed through the pre-filter unit 110 flows. Referring to FIG. 1, it can be seen that raw water having passed through the prefilter 110 in the upward and downward directions flows into the first case 121 from below the first case 121.

The first case 121 may have a hollow portion, and the cross-section may be formed in an annular shape. The fact that the cross section of the first case 121 is annular means that the first case 121 has an annular inner space in the region except for the hollow portion. The annular inner space is where a plurality of crystal generation catalysts 122 are charged. However, the shape of the first case 121 is not necessarily limited thereto. The first case 121 may be disposed to be surrounded by the pre-filter unit 110, but the present invention is not limited thereto.

The first case 121 forms a boundary with the pre-filter unit 110. The outer circumferential surface of the first case 121 is disposed to face the inner circumferential surface of the pre- The raw water passes through the prefilter 110 in a top-down direction with reference to FIG. 1, but can partially flow left and right. However, the raw water passing through the pre-filter unit 110 does not flow into the side of the crystal generation catalyst filter unit 120 due to the boundary formed by the first case 121. The housing 150 is disposed on the outer circumferential surface of the prefilter 110. The first case 121 is disposed on the inner circumferential surface of the prefilter 110 so that the raw water passes through the prefilter 110 As shown in Fig. For example, raw water filtered in the pre-filter unit 110 can flow down on the outer wall surface of the first case 121. Accordingly, the inner circumferential surface of the housing 150 and the first case 121 are combined with each other to form a flow of the raw water flowing in the top-down direction as a whole.

In the first case 121, a large number of crystal generation catalysts 122 are charged (or charged). The crystal formation catalyst 122 is made to promote the reaction of the bicarbonate anion with the hard or scaly material present in the raw water. And the crystal generation catalyst 122 is made to remove the hard or scaling material from the raw water through crystallization of the hard or scale-generating material. The mechanism of the crystal generation catalyst 122 will be described later in more detail with reference to FIG.

The crystal generation catalyst filter unit 120 has a flow path structure in which raw water flows upward from below. Specifically, the lower end of the crystal generation catalytic filter unit 120 is separated from the inner bottom surface of the housing 150, and the raw water that has passed through the pre-filter unit 110 flows into the channel structure of the crystal generation catalytic filter unit 120 . The crystal generation catalyst 122 is configured to remove the hard or scaled material from the raw water entering the flow path structure.

In order to improve the hardness material or scale-inducing material removal performance of the crystal generation catalyst 122, the space where the crystal formation catalyst 122 is present needs to be filtered while water is rising. The space in which the crystal generating catalyst 122 is present refers to the channel structure through which the raw water passes and means the inner space of the first case 121 in FIG. The flow of water is also referred to as up-flow.

Catalyst refers to a substance that plays a role in promoting or suppressing a chemical reaction, and the catalyst remains intact after mixing with the product after the reaction. The crystal-forming catalyst 122 of the present invention also promotes the crystal formation of the hard or scale-inducing material, but remains intact after mixing to the product after the reaction. When the crystal generated by promoting crystal formation is separated from the crystal formation catalyst 122, the crystal formation catalyst 122 can participate in another reaction. Therefore, in order to improve the hardness substance or the scale-inducing substance removing performance of the crystal generation catalyst 122, it is necessary to rapidly separate crystals from the crystal generation catalyst 122. [

When the crystal generation catalyst filter unit 120 has a flow path structure in which raw water flows upward from below, raw water coming into the flow path structure provides buoyancy to the crystal generation catalyst 122. By this buoyancy, the flow of the crystal generation catalyst 122 becomes active, whereby the crystal can be separated from the crystal generation catalyst 122. When the crystal generation catalyst filter unit 120 has a flow path structure in which raw water flows upward from below, crystals can be separated naturally from the crystal generation catalyst 122 using the buoyancy provided by the raw water without applying any external force .

Unlike the present invention, if the crystal generating catalyst filter unit 120 has a flow path structure in which raw water drops from the top to the bottom, an effect of separating crystals from the crystal generating catalyst 122 can be expected only by applying an external force . This type of flow is referred to as down-flow, distinguishing it from the upward flow.

The inner wall surface of the first case 121 surrounds a plurality of crystal generation catalysts 122. The plurality of crystal generation catalysts 122 are filled in the inner space surrounded by the inner wall surface of the crystal generation catalyst filter unit 120. A protrusion 123 is formed on the inner wall surface.

The composite filter 100 includes a crystallization catalyst filter unit 120 as well as a prefilter unit 110 and an ion exchange resin filter unit 130 and is connected in series with various additional filters, To form a filtration system. The performance of the filtration system is determined by the individual filters forming the filtration system. Since the performance of individual filters is influenced by the flow rate of the raw water, in order to improve the performance of the filtration system as a whole, the flow rate of the raw water passing through each filter must be maintained in an appropriate range.

The general filter except for the crystal generation catalytic filter unit 120 tends to increase the filtration performance as the flow rate increases, and then decrease again. This tendency is also true for various filters that can be used in the pre-filter unit 110. [ However, unlike a general filter, the crystal formation catalyst filter unit 120 including the crystal formation catalyst 122 has a tendency that the filtration performance decreases as the flow rate increases. This is because the crystal generation catalyst 122 can participate in a reaction that promotes crystal formation again only when it is separated from the crystal under the influence of the active flow of the raw water. Therefore, in order to improve the performance of the filtration system as a whole, the following two methods can be considered.

(1) The first is to configure the filtration system so that the flow rate is set differently for each filter and supply the appropriate flow rate to each filter. This scheme can exhibit the best filtration performance for each filter, so that the performance of the filtration system can be dramatically improved. However, in order to set the flow rate for each filter differently, a separate device for controlling the flow rate between the filter and the filter is needed. This does not fit the tendency for the filtration system to become smaller and simpler due to space utilization and sanitation.

(2) The second is to set the flow rate of the filtration system to a certain range of the flow rate suitable for the filter, while complementing the other filters so as to exhibit sufficient filtration performance within the set flow rate. The second method may reduce the effect of improving the performance of the filtration system as compared with the first method, but it may contribute to the miniaturization and simplification of the filtration system because a separate device for controlling the flow rate between the filter and the filter is not required.

In the present invention, a second method is adopted in accordance with the tendency to reduce and simplify the filtration system. The composite filter 100 includes not only the crystal generating catalyst 122 but also the pre-filter unit 110 and the ion-exchange resin filter unit 130. Further, the composite filter 100 is combined with other filters to form a filtration system You may. Therefore, if the performance of the pre-filter unit 110 and the other filters must be compensated for in accordance with the proper flow rate of the crystal generation catalyst 122, a complementary structure should be considered for each of the other filters except for the crystal generation catalyst 122 The solution of the problem is complicated.

On the other hand, if the crystal generation catalyst 122 is supplemented with the appropriate flow rate of the other filters, the filtration performance of the entire filtration system can be improved solely by solving the problem of solving the problem by supplementing the crystal generation catalyst 122. In order to solve the problem with a simple method, in the present invention, as a method for supplementing the filtration performance of the crystal generation catalyst 122 in a suitable flow rate range of the pre-filter unit 110, (123) was adopted.

As described above, the crystal formation catalyst 122 has a tendency that the filtration performance decreases and increases as the flow rate increases. Therefore, if only the crystal generation catalyst 122 is considered, it is preferable to increase the flow rate until the improvement of the filtration performance is saturated. However, the general filter tends to increase and decrease the filtration performance as the flow rate increases, and has a high filtration performance in a flow rate range relatively smaller than the optimum flow rate of the crystal formation catalyst 122.

The protrusion 123 formed on the inner wall surface of the first case 121 is configured to improve the filtration performance of the crystal generation catalyst 122 at a relatively small flow rate range. The protrusions 123 collide with the particles of the raw water and cause turbulence in the flow of the raw water. Although the flow rate passing through the composite filter 100 is smaller than the optimum flow rate of the crystal generation catalyst 122, separation of crystals from the crystal formation catalyst 122 can be made by turbulent flow. And the crystal formation catalyst 122 separated from the crystal can participate again in the other reaction. Therefore, the protrusion 123 formed on the inner wall surface of the first case 121 can improve the filtration performance of the crystal formation catalyst 122 even in a relatively small flow rate range through the formation of turbulence.

The protrusion 123 may be formed in a spiral shape along the inner wall surface of the first case 121. When the protrusion 123 is formed in a spiral shape, the raw water can form a turbulent flow while meeting the spiral protrusion 123 formed in a helical shape.

The plurality of protrusions 123 may be disposed on the crystal generation catalyst filter unit 120 in a direction along which the raw water flows. The raw water can form a turbulent flow by the protrusions 123 arranged apart from each other.

The ion exchange resin filter unit 130 is formed on the downstream side of the crystal generation catalyst filter unit 120 to filter the raw water that has passed through the crystal generation catalyst filter unit 120. The ion exchange resin filter unit 130 is configured to remove the hard material or the scale material from the raw water through ion exchange.

In the present invention, the arrangement order of the crystal generation catalyst filter unit 120 and the ion exchange resin filter unit 130 has a very important meaning. The placement order is concerned with which filter section passes first and which filter section is followed by the enemy.

Sufficient time is required for the crystallization process of the crystal generation catalyst 122. Therefore, the crystal formation catalyst 122 has a disadvantage that the initial reaction rate is slower than that of the ion exchange resin 132. The reaction rate comparison between the crystal generation catalyst 122 and the ion exchange resin 132 can be seen in FIG. And the crystal generation catalyst 122 has a disadvantage that it is difficult to remove 100% of the hard or scaled material present in the raw water.

On the other hand, the crystal formation catalyst 122 can participate in the crystallization reaction and then participate in another crystallization reaction. This is due to the characteristics of the catalyst. Therefore, the crystal generation catalyst 122 has a very long lifetime as compared with the ion exchange resin 132.

Conversely, the ion exchange resin 132 removes the hard or scaling material only by ion exchange. Therefore, the ion exchange resin 132 has an advantage that the initial reaction rate is very fast. The ion exchange resin 132 also has the advantage that it can remove almost 100% of the hard or scaling material present in the raw water.

On the other hand, the ion exchange resin 132 has a disadvantage that short life and regeneration are required due to consumption of ions to be exchanged. Unless regenerated, the ion exchange resin 132 will no longer be able to remove the hard or scaled material at any moment. Further, the ion exchange resin 132 has a disadvantage that the regeneration efficiency gradually decreases as the regeneration is repeated.

In the present invention, in consideration of the advantages and disadvantages of the crystal generation catalyst 122 and the ion exchange resin 132, the crystal generation catalyst filter unit 120 is disposed on the upstream side of the ion exchange resin filter unit 130, The filter portion 130 is disposed on the downstream side of the crystal generation catalyst filter portion 120.

When the crystal generation catalytic filter unit 120 is disposed on the upstream side of the ion exchange resin filter unit 130, the crystal generation catalyst 122 first separates a hard substance or a scale inducing substance from the raw water before the ion exchange resin 132 Can be removed. The load applied to the ion exchange resin 132 is reduced. Here, the load means the amount of the hard or scaled material that the ion exchange resin 132 should remove. The ion exchange resin 132 removes the hard substance or the scale inducing substance through the mechanism of ion exchange, so that the load applied to the ion exchange resin 132 is reduced. If the load applied to the ion exchange resin 132 is reduced, the lifetime and regeneration cycle of the ion exchange resin 132 can be extended. Therefore, when the crystal generation catalyst filter portion 120 is disposed on the upstream side of the ion exchange resin filter portion 130, the crystal generation catalyst 122 can compensate for the disadvantage of the ion exchange resin 132. [

Unlike the present invention, when the ion exchange resin filter portion 130 is disposed on the upstream side of the crystal generation catalyst filter portion 120, the load applied to the ion exchange resin 132 is not reduced at all. Therefore, the life of the ion exchange resin 132 and the effect of extending the regeneration cycle can not be expected.

When the ion exchange resin filter unit 130 is disposed on the downstream side of the crystal generation catalytic filter unit 120, the hard or hard scale substance or scale inducing substance, which has not been removed by the crystal generation catalyst 122, Can be removed. Since the crystal formation catalyst 122 can not remove 100% of the hard material or the scale generation material, the crystal formation catalyst 122 alone has a limitation in lowering the water hardness. However, if the ion exchange resin 132 even removes a hard or scaling material that has not been removed by the crystal generating catalyst 122, the hard or scaling material may be removed from the raw water as close as 100%. Therefore, when the ion exchange resin filter portion 130 is disposed on the downstream side of the crystal generation catalyst filter portion 120, the ion exchange resin 132 can compensate the disadvantage of the crystal generation catalyst 122.

If the crystal generation catalytic filter unit 120 is disposed downstream of the ion exchange resin filter unit 130, unlike the present invention, the ion exchange resin filter unit 130 may be made of a hard material Scale-inducing substances may be removed to near 100%. However, after the point in time when regeneration of the ion exchange resin 132 is required, the crystal generating catalyst 122 can not remove the hardness substance or the scale inducing substance as close as 100%.

The ion exchange resin filter unit 130 includes a second case 131 and a plurality of ion exchange resins 132.

The second case 131 is formed to introduce raw water that has passed through the crystal generation catalyst filter unit 120. The second case 131 forms a boundary with the crystal generation catalyst filter portion 120. The second case 131 may be formed in a substantially hollow cylindrical shape or a polygonal columnar shape. A plurality of ion exchange resins 132 are inserted into the second case 131. The mechanism of the ion exchange resin 132 will be described later with reference to FIGS. 3A and 3B.

And may be disposed in the hollow portion of the first case 121 of the second case 131. It should be noted that only the order of the flow path structure is constituted by the pre-filter section 110, the crystal generation catalyst filter section 120 and the ion exchange resin filter section 130, and the crystal generation catalyst 122 and the ion exchange resin 132 The structure and arrangement of the first case 121 and the second case 131 are not necessarily limited to those shown in Fig.

The ion exchange resin filter unit 130 has a flow path structure different from that of the crystal generation catalyst filter unit 120. It is preferable to suppress the flow of the ion exchange resin 132 as much as possible in order to maintain a stable adsorption section of the ion exchange resin filter section 130. If the ion exchange resin filter unit 130 has an upflow flow path structure like the crystal formation catalyst filter unit 120, it is difficult to suppress the flow of the ion exchange resin 132 due to buoyancy provided by the raw water. Therefore, the ion exchange resin filter unit 130 of the present invention has a flow path structure formed so that raw water drops from top to bottom. The flow of raw water falling from top to bottom corresponds to a down-flow.

Referring to FIG. 1, the upper end of the crystal generation catalyst filter unit 120 and the upper end of the ion exchange resin filter unit 130 are spaced apart from the inner upper end surface of the housing. Accordingly, the raw water that has passed through the crystal generation catalyst filter unit 120 can fall into the flow path structure of the ion exchange resin filter unit 130. If the ion exchange resin filter unit 130 has such a flow path structure, it is possible to suppress the flow of the ion exchange resin 132 filled in the second case 131, A stable adsorption section can be maintained.

The outer wall surface of the first case 121 and the outer wall surface of the second case 131 may be spaced apart from each other. An outflow channel (160) is formed between the outer wall surface of the first case (121) and the outer wall surface of the second case (131). The outflow channel 160 is connected to the outflow section 152 of the housing 150.

Referring to FIG. 1, the lower end of the ion exchange resin filter unit 130 is spaced from the inner bottom surface of the housing 150. Accordingly, the composite filter 100 is configured such that raw water having passed through the ion exchange resin filter unit 130 is discharged through the outflow channel 160.

The composite filter 100 includes a housing 150 configured to receive the pre-filter unit 110, the crystal generating catalyst filter unit 120, and the ion exchange resin filter unit 130. The housing 150 may have a water inlet 151 and a water outlet 152. The water-receiving portion 151 is formed to supply water to the pre-filter portion 110. The water outlet 152 communicates water that has passed through the pre-filter unit 110, the crystal generation catalyst filter unit 120, the ion exchange resin filter unit 130, and the water outlet channel 160 sequentially through the outside of the composite filter 100 As shown in FIG.

The pre-filter unit 110 may be disposed inside the housing 150, and the crystal generation catalyst 122 and the ion exchange resin 132 may be separately introduced into the remaining space. The crystal generation catalyst filter unit 120 and the ion exchange resin filter unit 130 are not formed of a block but are formed by collecting a plurality of crystal generation catalysts 122 and a plurality of ion exchange resins 132 respectively. Therefore, when the crystal generating catalyst 122 and the ion exchange resin 132 are injected into the remaining space of the housing 150, a single filter can be formed with the pre-filter unit 110, and the size of the composite filter 100 can be reduced . The crystal generation catalyst filter unit 120 and the ion exchange resin filter unit 130 must be placed in a space separated from each other. Should be arranged to have a flow path structure.

The composite filter (100) includes an outflow nonwoven filter (140). The outgoing nonwoven fabric filter 140 is disposed in the outflow channel 160 of the ion exchange resin filter unit 130. The outgoing nonwoven fabric filter 140 may be formed to enclose the second case 131 of the ion exchange resin filter unit 130 and may remove remaining foreign matter from the raw water discharged through the outflow channel 160. Crystals produced by the crystal generation catalyst 122 can also be filtered by the outflow nonwoven filter 140.

The pre-filter unit 110, the crystal generation catalyst filter unit 120, and the ion exchange resin filter unit 130 may be formed as a unit module so as to be easily coupled or separated from each other. Crystal formation of the unit module The catalytic filter part 120 is inserted into the hollow part of the pre-filter part 110 which is another unit module and the crystal generation catalytic filter part 120 is connected to the ion exchange resin filter part 130 which is another unit module. The coupling of the pre-filter unit 110, the crystal generation catalyst filter unit 120, and the ion exchange resin filter unit 130 can be performed.

Hereinafter, the mechanism by which the crystal generating catalyst 122 removes a hard substance or a scale inducing substance from raw water will be described.

Fig. 2 is a concept showing the mechanism of the crystal generation catalyst 122. Fig.

The crystal generation catalyst 122 includes a carrier 122a (catalyst support, carrier, or supporting material) and a crystal seed 122c.

The carrier 122a is made of a polymer having a negative charge. The hard or scale-inducing substances such as the calcium cation (10) and the magnesium cation (20) are positively charged. Accordingly, if the carrier 122a is made of a polymer having a negative charge, the carrier 122a can pull the hard or scaled material by electrostatic attraction. Negatively charged polymers include, for example, polyacrylates.

A plurality of crystallization sites 122b are formed on the surface of the carrier 122a. The crystallization site 122b refers to a space where the crystallization of the hard substance or the scale substance occurs. In the crystallization site 122b, a crystal seed 122c exists.

The crystal seeds 122c are inorganic materials that make a hard or scale-inducing material crystal. The crystal seed 122c comprises at least one of calcium and magnesium. For example, the crystal seed 122c may include at least one of calcium carbonate (calcium carbonate, CaCO ₃ ) crystals and magnesium carbonate (magnesium carbonate, MgCO ₃ ) crystals.

The hard or scaled material present in the raw water such as the calcium cation 10 or the magnesium cation 20 is attracted to the crystallization site 122b of the carrier 122a by an electrostatic attractive force when approaching the crystal generation catalyst 122 Gather. In the crystallization site 122b, there is a crystal seed 122c, and the hard seed material or the scale inducing material is crystallized by the crystal seed 122c. The crystallization formula of the hard substance or the scale inducing substance may be represented by the following formulas (1) and (2). MEDIA refers to the crystal formation catalyst 122.

[Chemical Formula 1]

Ca ^{2 +} + HCO ₃ ^- + MEDIA -> CaCO ₃ (crystal) + CO ₂ + H ₂ O + MEDIA

(2)

Mg ^{2 +} + HCO ₃ ^- + MEDIA -> MgCO ₃ (crystal) + CO ₂ + H ₂ O + MEDIA

The crystal formation catalyst 122 promotes the reaction between the calcium cation (Ca ^{2 +} ) and the bicarbonate anion (HCO ₃ ^- ) present in the raw water as shown in Formula 1. Also, the crystal formation catalyst 122 promotes the reaction between the magnesium cation (Mg ^{2 +} ) and the bicarbonate anion (HCO ₃ ^- ) present in the raw water as shown in Formula 2. The crystal formation catalyst 122 contributes to the crystallization of the hard or scale-inducing substance through the reaction of the formula (1) and the reaction of the formula (2).

The crystal 30 can be separated from the crystallization site 122b by the active flow of the raw water. The crystals 30 separated from the crystal generation catalyst 122 can be mechanically filtered by the outgoing nonwoven fabric filter 140 described in Fig.

Hereinafter, the mechanism and regeneration of the ion exchange resin 132 will be described.

FIG. 3A is a concept showing the mechanism of the ion exchange resin 132. FIG.

The ion exchange resin 132 has a sodium cation (Na +) and a functional group (SO ₃ ^- ). There is a difference in selectivity (or affinity) between the sodium cation bonded to the functional group (SO ₃ ^- ) of the ion exchange resin 132 and the hard or scaly substance present in the raw water (calcium cation or magnesium cation) Therefore, chemical ion exchange may occur. Since the affinity of the calcium cation to the functional group is greater than that of the sodium cation in the functional group, the sodium cation in the functional group is separated from the functional group, and instead, the calcium cation binds to the functional group. The magnesium cation also binds to the functional group on the same principle as the calcium cation. By this ion exchange process, the hard or scaled material can be removed from the raw water, and the hardness of the raw water can be lowered.

The ion exchange resin 132 has the advantage that the initial reaction rate is very fast since it removes the hard or scaled material by chemical ion exchange. As long as sodium cations and functional groups are present in the ion exchange resin 132, the hard or scale-originating substances present in the raw water can be continuously removed.

However, the amount of sodium cations and functional groups present in the ion exchange resin 132 is limited. Therefore, as the ion exchange resin 132 repeats the chemical ion exchange operation, the ion exchange performance gradually decreases. In order to recover the performance of the ion exchange resin 132, regeneration is required.

FIG. 3B is a concept showing the regeneration of the ion exchange resin 132.

In order to regenerate the ion exchange resin 132, the ion exchange resin 132 is exposed to salt water (a liquid containing a salt). There is a difference in concentration between the sodium cation and the calcium cation, and there is also a difference in the concentration between the sodium cation and the magnesium cation because there is an excessive amount of sodium cation in the brine. When excessive sodium cations present in the brine meet the ion exchange resin 132 to be regenerated, the calcium cation or magnesium cation bound to the functional group is desorbed from the functional group by the difference in concentration and the sodium cation is bonded to the functional group.

The ion exchange resin 132 can recover the removal performance of the hard or scale-generating material by regeneration. However, the efficiency of the reproduction gradually decreases as the reproduction is repeated. As a result, the regeneration cycle of the ion exchange resin 132 is shortened, and the recovery effect of the ion exchange performance is also lowered.

 However, the present invention has already been described in which the disadvantage of such an ion exchange resin 132 is complemented by the crystal generation catalyst 122 (see Figs. 2 and 2).

4 is a graph showing an experimental comparison between the crystal generating catalyst 122 and the ion exchange resin 132. Fig.

The abscissa of the graph represents time (minutes), and the ordinate represents water hardness reduction (%). The rate of decrease in hardness means the filtration performance that removes the hard and hard materials from the raw water.

Referring first to the graph of the ion exchange resin 132, the ion exchange resin 132 shows a drastic high filtration performance from the beginning. The hardness of the raw water exposed to the ion exchange resin 132 is lowered in a short time, and therefore the ion exchange resin 132 has a very early initial reaction speed. In addition, since the rate of decrease in hardness of the ion exchange resin 132 is close to 100%, it can be confirmed that the ion exchange resin 132 has very excellent filtration performance.

However, according to the experimental results, the lifetime of the ion exchange resin 132 ends before the operation time reaches about 200 minutes. Although the lifetime of the ion exchange resin 132 may vary depending on experimental conditions, it does not change that the lifetime of the ion exchange resin 132 is shorter than the lifetime of the crystal generation catalyst 122 even if the experimental conditions are changed. Therefore, in order to continue using the ion exchange resin 132, it is required to undergo a regeneration process.

On the other hand, referring to the graph of the crystal formation catalyst 122, the crystal formation catalyst 122 has a slower filtration performance than the ion exchange resin 132. This means that the crystal generation catalyst 122 has a slower reaction rate than the ion exchange resin 132. However, unlike the ion exchange resin 132, the filtration performance of the crystal generation catalyst 122 gradually increases with time. This means that the life of the crystal generation catalyst 122 is very long as compared with that of the ion exchange resin 132, and unlike the ion exchange resin 132, it does not require frequent regeneration.

The reason why the crystal generation catalyst 122 has a much longer lifetime than the ion exchange resin 132 is due to the difference in mechanism. As the ion exchange resin 132 removes the hard or scaling material from the raw water through exchange of ions, the number of exchangeable ions decreases over time. On the other hand, the crystal formation catalyst 122 can have a much longer lifetime than the ion exchange resin 132 because the generated crystal can be participated in another reaction to generate crystals once the generated crystal is separated from the crystal formation catalyst.

The composite filter of the present invention complements the disadvantages of the ion exchange resin 132 that requires regeneration by using the crystal generation catalyst 122 and uses the ion exchange resin 132 to produce a crystal formation catalyst 122). Particularly, as the regeneration cycle of the ion exchange resin 132 becomes longer, the present invention has an advantage of solving the problems such as waste of water, regeneration of the environment and pollution due to regeneration.

Hereinafter, another embodiment of the present invention will be described.

5 is a cross-sectional view of a composite filter 200 according to a second embodiment of the present invention.

The prefilter unit 110 receives the raw water from the water intake unit 251. The prefilter unit 110 is provided with a water supply unit 251 at one side of the housing 250. The pre-filter unit 110 is configured to remove at least one of particulate matter, organic matter, and residual chlorine present in the raw water. The pre-filter unit 110 may remove at least one of particulate matter, organic matter, and residual chlorine from the raw water flowing in the direction of the inner circumferential surface from the outer circumferential surface.

The pre-filter unit 110 has a hollow portion. The crystal generating catalyst filter unit 220 may be disposed in the hollow portion of the pre-filter unit 110. The crystal generation catalyst filter unit 220 may be composed of a block 220 having a plurality of crystal generation catalysts 122 (see FIG. 2). The block 200 having a crystal generating catalyst may be referred to as a first block 220 to distinguish it from a block of the ion exchange resin filter unit 230. Since the first block 220 and the crystal generation catalyst filter unit 220 are substantially the same, reference numerals of the first block 220 are denoted by the same reference numerals as those of the crystal generation catalyst filter unit 220.

The first block 220 is configured to remove the hard or scaled material from the raw water flowing from the outer circumferential surface to the inner circumferential surface. Since the first block 220 has a plurality of crystal generation catalysts, the mechanism of the first block 220 is the same as the mechanism of the crystal formation catalyst described above. The crystal can be separated from the crystal formation catalyst by the raw water passing through the crystal formation catalyst in the shear direction.

The first block 220 includes a hollow portion. The ion exchange resin filter portion 230 may be disposed in the hollow portion of the first block 220. The ion exchange resin filter portion 230 may be composed of a block 230 having a plurality of ion exchange resins 132 (see FIGS. 3A and 3B). This block 230 may be referred to as a second block 230 to distinguish it from the first block 220. Since the second block 230 and the ion exchange resin filter unit 230 are substantially the same, reference numerals of the first block 230 are denoted by reference numerals 230 of the crystal generation catalyst filter unit 230.

The second block 230 is configured to remove the hard or scaled material from the raw water flowing from the outer circumferential surface to the inner circumferential surface. Since the second block 230 has a plurality of ion exchange resins 132, the mechanism of the second block 230 is the same as the mechanism of the ion exchange resin 132 described above.

The degree of integration of the material of the composite filter 200 can be improved by making the crystal generation catalyst filter unit 220 as the first block 220 and the ion exchange resin filter unit 230 as the second block 230 have. When regeneration of the ion exchange resin 132 is required, only the second block 230 is separated and regenerated, and then inserted into the hollow portion of the first block 220 again. Therefore, the block structure can improve the convenience of reproduction.

The second block 230 has a hollow portion. The outflow channel 260 may be disposed in the hollow portion of the second block 230 and the outflow channel 260 may receive the raw water from the second block 230. The outflow channel 260 forms a flow path connected to the water outlet 252. The filtered raw water can be discharged to the outside of the housing 250 through the outflow channel 260 and the water outlet 252. [

However, the block structure for improving the degree of integration of materials is not necessarily limited to the structure of FIG. Either one of the first block 220 and the second block 230 may be formed to surround the other depending on the positions of the water inlet 251 and the water outlet 252. For example, unlike FIG. 5, a structure in which the second block 230 is formed to surround the first block 220 is also possible. However, the flow path structure of the composite filter should be such that raw water is sequentially filtered by the first block 220 and the second block 230.

Hereinafter, various modifications of the filtration system in which the composite filter 100 or 200 of the present invention is connected in series with other filters will be described. If the composite filter 100 or 200 consists of a single filter, then the filtration system is formed of a collection of several filters.

FIG. 6 is a concept diagram illustrating the construction of a two-stage filtration system by connecting the composite filter of the present invention and other filters in series.

The filtration system is formed by connecting two filters in two stages. The composite filter 100 or 200 of the present invention is disposed on the upstream side and the UF filter 300 (Ultrafiltration) is disposed on the downstream side. The UF filter 300 filters the water by the pressure difference as a driving force, and separates the specific substance from the water by the size difference between the pores and the solute. The composite filter 100 or 200 and the UF filter 300 are connected in series.

At least one of the particulate matter, the organic matter and the residual chlorine is removed in the pre-filter unit 110 or 210 (see Figs. 1 and 5) of the composite filter 100 or 200. Crystallization of the composite filter 100 or 200 In the catalytic filter portion 120 or 220 (see Figs. 1 and 5), the hardness substance or the scale inducing substance is removed by a mechanism called crystallization. The hard or scaled material is removed by the mechanism of ion exchange with the ion exchange resin filter portion 130 or 230 (see Figures 1 and 5) of the composite filter 100 or 200. The UF filter 300 may remove contaminants, colloids, proteins, microbiological contaminants and macromolecules from the filtered water in the composite filter 100 or 200.

FIG. 7 is another concept of a two-stage filtration system in which a composite filter of the present invention and other filters are connected in series.

The filtration system is formed by connecting two filters in two stages. The composite filter 100 or 200 of the present invention is disposed on the upstream side and the composite filters 300 and 400 having the UF filter unit 300 and the post carbon block filter unit 400 are arranged on the downstream side. The upstream side composite filter 100 or 200 is referred to as a first composite filter 100 or 200 in order to distinguish the upstream side composite filter 100 or 200 from the downstream side composite filter 300 or 400 And the downstream composite filters 300 and 400 may be referred to as second composite filters 300 and 400.

The second composite filters 300 and 400 include a UF filter unit 300 and a post-carbon block filter unit 400 in a single housing (not shown). The post-carbon block filter unit 400 of the second composite filters 300 and 400 filters bacteria that can reproduce in the filtration system once more. The description of the remaining filters or filter portions is omitted above.

FIG. 8 is a concept diagram illustrating the construction of a three-stage filtration system by connecting the composite filter of the present invention and other filters in series.

The filtration system is formed by connecting three filters in three stages. The composite filter 100 or 200 of the present invention is disposed on the upstream side, the UF filter 300 is disposed on the downstream side, and the carbon block filter 400 is disposed on the downstream side. The composite filter 100 or 200, the UF filter 300, and the carbon block filter 400 are connected in series.

Unlike the second composite filter 300 or 400 described in FIG. 7 having the UF filter unit 300 and the post-carbon block filter unit 400 in a single housing (not shown), the filtration system of FIG. There is a difference in that the filter 300 and the carbon block filter 400 are respectively provided in different housings (not shown).

FIG. 9 is another concept in which a composite filter of the present invention and other filters are connected in series to constitute a three-stage filtration system.

A carbon block filter is disposed on the upstream side, a UF filter is disposed on the downstream side, and a composite filter 100 or 200 is disposed on the downstream side. The filtration system of FIG. 9 is different from the filtration system of FIG. 8 only in the arrangement order of the filters, but the rest of the configuration is the same. The order of the filters forming the filtration system can be modified as needed.

The above-described composite filter is not limited to the configuration and the method of the embodiments described above, but all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments.

Claims (22)

A pre-filter unit configured to remove at least one of particulate matter, organic matter, and residual chlorine present in the raw water;
A pre-filter unit formed on the downstream side of the pre-filter unit to filter raw water passing through the pre-filter unit, wherein the reaction between the hard or amorphous substances present in the raw water and the bicarbonate anion is promoted, Or a crystal generating catalyst filter part made to remove the scale-generating substance; And
And an ion exchange resin filter portion formed on the downstream side of the crystal generation catalyst filter portion to filter the raw water that has passed through the crystal generation catalyst filter portion and to remove the hard substance or the scale inducing substance from the raw water through ion exchange,
The crystal generation catalyst filter unit has a flow path structure in which raw water flows upward from below,
Wherein the ion exchange resin filter unit has a flow path structure in which raw water drops from top to bottom. The method according to claim 1,
Wherein the crystal generation catalyst filter portion includes a plurality of crystal generation catalysts,
The crystal generating catalyst may be a catalyst for promoting the reaction between the calcium cation and the bicarbonate anion present in the raw water or promoting the reaction between the magnesium cation and the bicarbonate anion present in the raw water to crystallize the hard or scaly- . The method according to claim 1,
Wherein the crystal generation catalyst filter portion includes a plurality of crystal generation catalysts,
The above-mentioned crystal-
A carrier made of a polymer having a negative charge; And
And a crystal seed present in the crystallization site of said carrier and comprising at least one of calcium and magnesium. delete The method according to claim 1,
In the composite filter,
A housing formed to receive the crystal generation catalyst filter portion and the ion exchange resin filter portion; And
And a pre-filter portion disposed to face the inner circumferential surface of the housing and configured to remove at least one of particulate matter, organic matter, and residual chlorine present in the raw water,
The crystal generation catalyst filter unit may include:
A first case formed to receive raw water passing through the pre-filter unit and forming a boundary with the pre-filter unit; And
And a plurality of crystal generation catalysts injected into the first case,
Wherein the ion exchange resin filter unit comprises:
A second case formed to introduce raw water that has passed through the crystal generation catalyst filter unit and form a boundary with the crystal generation catalyst filter unit; And
And a plurality of ion exchange resins injected into the second case. 6. The method of claim 5,
And a spiral protrusion is formed on an inner wall surface of the first case. 6. The method of claim 5,
A plurality of protrusions are formed on an inner wall surface of the first case,
Wherein the plurality of protrusions are disposed apart from each other along a direction in which raw water flows in the crystal generation catalyst filter portion. 6. The method of claim 5,
Wherein the lower end of the crystal generation catalyst filter portion is formed so that raw water that has passed through the pre-filter portion away from the inner bottom surface of the housing is introduced into the flow path structure of the crystal generation catalyst filter portion. 6. The method of claim 5,
The upper end of the crystal generation catalyst filter portion and the upper end of the ion exchange resin filter portion are spaced apart from the inner upper end surface of the housing so that raw water having passed through the crystal generation catalyst filter portion is formed to fall into the flow path structure of the ion exchange resin filter portion A composite filter characterized by. delete The method according to claim 1,
In the composite filter,
A housing formed to receive the crystal generation catalyst filter portion and the ion exchange resin filter portion; And
And the pre-filter portion disposed so as to face the inner circumferential surface of the housing,
Wherein the crystal generation catalyst filter portion comprises a first block having a plurality of crystal generation catalysts,
Wherein the ion exchange resin filter portion comprises a second block having a plurality of ion exchange resins. 12. The method of claim 11,
Wherein one of the first block and the second block is formed so as to surround the other of the first block and the second block,
Wherein the flow path structure of the composite filter is such that raw water is sequentially filtered by the first block and the second block. A crystal generating catalytic filter portion for promoting the reaction of the hard or amorphous substance present in the raw water with the bicarbonate anion and removing the hard substance or the scale provoking substance from the raw water through crystallization;
An ion exchange resin filter unit formed on the downstream side of the crystal generation catalyst filter unit to filter the raw water that has passed through the crystal generation catalyst filter unit and to remove the hard or scaled material from the raw water through ion exchange;
A housing formed to receive the crystal generation catalyst filter portion and the ion exchange resin filter portion; And
And a pre-filter portion disposed to face the inner circumferential surface of the housing and configured to remove at least one of particulate matter, organic matter, and residual chlorine present in the raw water,
The crystal generation catalyst filter unit may include:
A first case formed to receive raw water passing through the pre-filter unit and forming a boundary with the pre-filter unit; And
And a plurality of crystal generation catalysts injected into the first case,
Wherein the ion exchange resin filter unit comprises:
A second case formed to introduce raw water that has passed through the crystal generation catalyst filter unit and form a boundary with the crystal generation catalyst filter unit; And
And a plurality of ion exchange resins injected into the second case,
An outflow channel is formed between the outer wall surface of the first case and the outer wall surface of the second case,
Wherein the lower end of the ion exchange resin filter portion is configured to discharge raw water passing through the ion exchange resin filter portion from the inner bottom surface of the housing through the outflow channel. 14. The method of claim 13,
Wherein the crystal generation catalyst filter portion includes a plurality of crystal generation catalysts,
The crystal generating catalyst may be a catalyst for promoting the reaction between the calcium cation and the bicarbonate anion present in the raw water or promoting the reaction between the magnesium cation and the bicarbonate anion present in the raw water to crystallize the hard or scaly- . 14. The method of claim 13,
Wherein the crystal generation catalyst filter portion includes a plurality of crystal generation catalysts,
The above-mentioned crystal-
A carrier made of a polymer having a negative charge; And
And a crystal seed present in the crystallization site of said carrier and comprising at least one of calcium and magnesium. 14. The method of claim 13,
The crystal generation catalyst filter unit has a flow path structure in which raw water flows upward from below,
Wherein the ion exchange resin filter unit has a flow path structure in which raw water drops from top to bottom. 14. The method of claim 13,
And a spiral protrusion is formed on an inner wall surface of the first case. 14. The method of claim 13,
A plurality of protrusions are formed on an inner wall surface of the first case,
Wherein the plurality of protrusions are disposed apart from each other along a direction in which raw water flows in the crystal generation catalyst filter portion. 14. The method of claim 13,
Wherein the lower end of the crystal generation catalyst filter portion is formed so that raw water that has passed through the pre-filter portion away from the inner bottom surface of the housing is introduced into the flow path structure of the crystal generation catalyst filter portion. 14. The method of claim 13,
The upper end of the crystal generation catalyst filter portion and the upper end of the ion exchange resin filter portion are spaced apart from the inner upper end surface of the housing so that raw water having passed through the crystal generation catalyst filter portion is formed to fall into the flow path structure of the ion exchange resin filter portion A composite filter characterized by. 14. The method of claim 13,
In the composite filter,
A housing formed to receive the crystal generation catalyst filter portion and the ion exchange resin filter portion; And
And a pre-filter portion disposed to face the inner circumferential surface of the housing and configured to remove at least one of particulate matter, organic matter, and residual chlorine present in the raw water,
Wherein the crystal generation catalyst filter portion comprises a first block having a plurality of crystal generation catalysts,
Wherein the ion exchange resin filter portion comprises a second block having a plurality of ion exchange resins. 22. The method of claim 21,
Wherein one of the first block and the second block is formed so as to surround the other of the first block and the second block,
Wherein the flow path structure of the composite filter is such that raw water is sequentially filtered by the first block and the second block.

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