KR20100106858A - Water purifier capable of reducing residual chlorine - Google Patents

Abstract

PURPOSE: A water cleaner for eliminating residual chlorine which is still existing in the water passing through an activated carbon filter is provided to supply the water cleaner by blocking the film of the reverse osmosis membrane filter and maintain the performance of the reverse osmosis membrane filter. CONSTITUTION: A water-cleaner includes an active carbon filter eliminating impurity through the active carbon absorption, a residual chlorine removal unit(120) in which the removal of chlorine material eliminating the residual chlorine included in the water passing through the active carbon filter with the chemical reaction is included and a tank storing the water filtered in the filter. The residual chlorine removal unit and the reverse osmosis membrane filter are composed of a composite filter(200) consisting of one module. A composite filter is arranged in an inlet port(201).

Description

Water Purifier Capable of Reducing Residual Chlorine

The present invention relates to a water purifier capable of stably removing residual chlorine, and more particularly, it is possible to remove residual chlorine remaining in water passing through an activated carbon filter by chemical reaction, thereby minimizing damage to the reverse osmosis membrane filter. It is about water purifier which can be.

Recently, as environmental pollution, especially water pollution, becomes a social problem, the use of water purifiers to remove impurities by filtering water physically or chemically is increasing.

Of these water purifiers, the reverse osmosis water purifier performs artificial water purification by applying an artificial pressure to the concentrated concentration so that water, which is a solvent in a high concentration solution, passes through the osmotic membrane and moves toward the lower concentration.

Figure 1 shows an example of such a reverse osmosis water purifier.

Referring to Figure 1, the conventional reverse osmosis water purifier (1) is a sediment filter (11) to receive raw water from the tap water and remove dust, debris, various suspended matter through a fine filter of about 5 microns, By using adsorption method of active plate, free carbon filter (12) which removes harmful chemicals such as carcinogen (THM), synthetic detergent, insecticide and chlorine component, and reverse osmosis membrane of 0.0001 micron Heavy metals, of course, sodium, and various pathogens, and the concentrated water is connected to the reverse osmosis membrane filter 13 and the reverse osmosis membrane filter 13 and the purified water pipe 13b discharged through the drain pipe 13a. The filter unit 10 which consists of the post carbon filter 14 which removes the unpleasant taste, smell, pigment | dye, etc. contained in the water which passed the reverse osmosis membrane filter 13 is provided. In addition, the pump 15 is mounted at the front end of the reverse osmosis membrane filter 13 to supply pressure to the water flowing into the reverse osmosis membrane filter 13.

As such, the water filtered by the filter unit 10 is stored in the water tank 20 to be used by the user.

The membrane of the reverse osmosis membrane filter 13 is very vulnerable to residual chlorine and may be damaged. In this case, the pores may be damaged so that the dissolved solids may not be sufficiently removed, thereby increasing the TDS (total dissolved solids) of the purified water. do.

Therefore, the conventional reverse osmosis type water purifier is provided with a precarbon filter 12 at the front end of the reverse osmosis membrane filter 13 to remove residual chlorine flowing from raw water by activated carbon adsorption.

The activated carbon contained in the precarbon filter 12 has the advantage of removing not only residual chlorine but also harmful chemicals such as carcinogens (THM), synthetic detergents, and insecticides by using physical adsorption methods, while In order to remove the residual chlorine contained, a large amount is required and takes up a large volume.

Accordingly, in order to prevent residual chlorine from flowing into the reverse osmosis membrane filter 13, the capacity of the precarbon filter 12 should be large enough, thereby increasing the size of the entire filter part.

Therefore, a technique for removing residual chlorine in a manner different from the conventional one is required.

The present invention is to solve at least some of the conventional problems as described above, it is possible to stably maintain the performance of the reverse osmosis membrane filter by removing the residual chlorine flowing into the reverse osmosis membrane filter from the activated carbon filter by a chemical reaction To provide a water purifier capable of removing residual chlorine by chemical reaction.

In another aspect, the present invention, it is possible to reduce the chlorine removal load of the activated carbon filter (pre-carbon filter) installed in the front end of the reverse osmosis membrane filter and to reduce the capacity of the activated carbon filter, it is possible to remove residual chlorine by chemical reaction It is an object to provide a water purifier.

In another aspect, an object of the present invention is to provide a water purifier capable of removing residual chlorine by a chemical reaction, which is excellent in removing residual chlorine even in a small volume compared to a conventional activated carbon filter using a physical pore adsorption method.

In addition, an object of the present invention is to provide a water purifier capable of removing residual chlorine by a chemical reaction, which can be compactly configured by reducing the size of the filter unit.

In order to achieve the above object, the present invention includes an activated carbon filter for removing impurities through activated carbon adsorption, and a chlorine removal material for removing residual chlorine contained in water passing through the activated carbon filter by chemical reaction. A filter unit including a residual chlorine removal unit and a reverse osmosis membrane filter for filtering the water passing through the residual chlorine removal unit; And a tank for storing the water filtered by the filter unit. A water purifier capable of removing residual chlorine by a chemical reaction is provided.

Preferably, the residual chlorine removal unit and the reverse osmosis membrane filter may be composed of a composite filter consisting of one module.

More preferably, the composite filter may be configured such that the residual chlorine removal unit is disposed at the inlet side, and the reverse osmosis membrane filter is disposed in succession to the residual chlorine removal unit.

Also preferably, the composite filter may be configured such that the reverse osmosis membrane filter is longitudinally positioned at the inner center of the housing, and the residual chlorine removal unit is disposed outside the reverse osmosis membrane filter.

More preferably, the composite filter may include a blocking member surrounding an outer circumferential surface of the reverse osmosis membrane filter such that water passing through the residual chlorine removal part flows along an inner surface of the housing and flows in one end of the reverse osmosis membrane filter. have.

Preferably, the residual chlorine removal unit may be configured to receive a material containing a copper zinc alloy body (KDF), or calcium sulfite (CaSO ₃ ) to remove the residual chlorine through a chemical reaction.

According to the present invention as described above, by installing the residual chlorine removal unit between the activated carbon filter and the reverse osmosis membrane filter, it is possible to stably block the residual chlorine remaining in the water passing through the activated carbon filter to the reverse osmosis membrane filter, Accordingly, the membrane of the reverse osmosis membrane filter can be prevented from being damaged, so that the performance of the reverse osmosis membrane filter can be stably maintained.

In addition, the conventional reverse osmosis water purifier has to increase the capacity of the activated carbon filter (free carbon filter) in order to block the residual chlorine flow into the reverse osmosis membrane filter, according to the present invention activated carbon by installing the residual chlorine removal unit It is possible to reduce the chlorine removal load of the filter (precarbon filter), so that the capacity of the activated carbon filter can be reduced.

In addition, according to one embodiment of the present invention, residual chlorine is removed by a chemical reaction of copper zinc alloy or calcium sulfite (CaSO ₃ ). In this case, the size of the filter unit can be reduced.

In addition, according to an embodiment of the present invention, the reverse osmosis membrane filter and the residual chlorine removal unit are modularized to form a composite filter, thereby reducing the installation space of the residual chlorine removal unit.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a schematic diagram of a water purifier capable of removing residual chlorine by a chemical reaction according to an embodiment of the present invention, and FIG. 3 is a schematic diagram of a water purifier capable of removing residual chlorine by a chemical reaction according to another embodiment of the present invention. 4 is a cross-sectional view showing an embodiment of a composite filter in which the residual chlorine removal unit and the reverse osmosis membrane filter are integrally formed according to the present invention, and FIG. 5 is the integral chlorine removal unit and the reverse osmosis membrane filter integrated according to the present invention. It is sectional drawing which shows another Example of the composite filter formed with the.

As shown in Figure 2, the reverse osmosis water purifier 100 according to an aspect of the present invention comprises a filter unit 110 and the purified water tank 160 for storing the purified water passed through it.

The filter unit 110 includes an activated carbon filter (free carbon filter) 112 and a reverse osmosis membrane filter 130 for removing impurities through physical activated carbon adsorption, and the activated carbon filter 112 Between the reverse osmosis membrane filter 130, a residual chlorine removal unit 120 including a chlorine removal material for removing residual chlorine contained in water passing through the activated carbon filter 112 by a chemical reaction is installed.

In this case, as the chlorine removal material contained in the residual chlorine removal unit 120, a material containing a copper zinc alloy (KDF, Kinetic Degradation Fluction) or calcium sulfite (CaSO ₃ ) may be used.

Of the instantaneously zinc chloride (ZnCl ₂₎ If the ^meet-copper zinc alloy body (KDF) is a metal material which specifically alloys of zinc and copper, zinc ion is a water in residual chlorine in an unstable state (HOCl, OCl) Changes to a harmless material remove residual chlorine.

In addition, calcium sulfite (CaSO ₃ ) chemically reacts with residual chlorine (HOCl, OCl ⁻ ) to precipitate calcium sulfate (CaSO ₄ ) to remove residual chlorine. The chemical reaction formula of calcium sulfite (CaSO ₃ ) and residual chlorine HOCl, OCl ⁻ ) is as follows.

_{HClO + CaSO 3 → CaSO 4 +} H + + Cl -

In particular, the copper zinc alloy (KDF) or calcium sulfite (CaSO ₃ ) exhibits an excellent residual chlorine removal effect in a small volume compared to the activated carbon filter using a physical pore adsorption method.

As described above, the water purifier 100 according to the present invention is a copper zinc alloy body (KDF) or calcium sulfite (CaSO ₃ ) in which residual chlorine remaining in water passing through the activated carbon filter 112 is accommodated in the residual chlorine removal unit 120. By removing by using it is possible to minimize the amount of residual chlorine flowing into the reverse osmosis membrane filter (130). Accordingly, the membrane of the reverse osmosis membrane filter 130 can be prevented from being damaged, thereby maintaining the filtration performance of the reverse osmosis membrane filter 130 and thus total dissolved solids (TDS) included in the finally purified water. It is possible to lower the value of.

In addition, the filter unit 110 may include a plurality of filters in addition to the activated carbon filter 112 and the reverse osmosis membrane filter 130, similar to a conventional water purifier. For example, as shown in FIG. 2, the sediment filter 111, the activated carbon filter (precarbon filter) 112, the reverse osmosis membrane filter 130, and the post carbon filter 113 may be configured. However, the type and number of such filters are not limited thereto.

In addition, a front end of the reverse osmosis membrane filter 130 may be provided with a pump 115 for applying pressure to the water flowing into the reverse osmosis membrane filter 130. In this case, although the pump 115 is shown between the residual chlorine removal unit 120 and the reverse osmosis membrane filter 130, it provides sufficient pressure to the water flowing into the reverse osmosis membrane filter 130. If possible, the pump 115 may be provided at the front end of the residual chlorine removal unit 120.

As such, in the water purifier 100 capable of removing residual chlorine by a chemical reaction according to an aspect of the present invention, the residual chlorine removal unit 120 is installed between the activated carbon filter 112 and the reverse osmosis membrane filter 130. Residual chlorine remaining in the water passing through the filter 112 can be prevented from entering the reverse osmosis membrane filter 130, thereby preventing the membrane of the reverse osmosis membrane filter 130 is damaged to reverse osmosis membrane filter It is possible to sufficiently maintain the performance of 130.

In addition, the conventional reverse osmosis water purifier has to increase the capacity of the activated carbon filter (pre-carbon filter) in order to block the inflow of residual chlorine into the reverse osmosis membrane filter, but this was limited, but according to an embodiment of the present invention Purifier 100 has the advantage that it is possible to reduce the chlorine removal load of the activated carbon filter 112 by installing the residual chlorine removal unit 120 to reduce the capacity of the activated carbon filter 112.

That is, the water purifier 100 according to the present invention can sufficiently expect the residual chlorine effect even if the capacity of the activated carbon filter 112 is reduced by supplementing a portion of the chlorine removal capability of the activated carbon filter 112 with the residual chlorine removal unit 120. It becomes possible.

3 shows another embodiment of the water purifier 100 capable of removing residual chlorine by a chemical reaction according to the present invention.

Except for the residual chlorine remover 100 shown in Figure 3 is a residual chlorine removal unit 120 and the reverse osmosis membrane filter 130 is provided as a composite filter 200 to form an integral module. It is the same in the structure and effect of the water purifier of FIG. Therefore, in order to avoid unnecessary duplication, description of the same or similar configuration is omitted, and the same reference numerals are assigned to the same or similar configuration.

An embodiment of the composite filter 200 in which the residual chlorine removal unit 120 and the reverse osmosis membrane filter 130 illustrated in FIG. 3 are integrated will be described in more detail with reference to FIGS. 4 and 5.

In the composite filter 200 shown in FIG. 4, the residual chlorine removal unit 120 is disposed at the inlet 201 side of the housing 210, and the reverse osmosis membrane filter 130 is downstream of the residual chlorine removal unit 120. It is arranged next to the side.

The residual chlorine removal unit 120 is fixed to the inlet 201 side of the housing 210 through the coupling member 122. At this time, the residual chlorine removal unit 120 is made of a nonwoven fabric or the like to prevent the chlorine removal material 121, such as copper zinc alloy (KDF) or calcium sulfite (CaSO ₃ ) contained therein to be separated or separated to the outside The member 123 may be provided.

In addition, the reverse osmosis membrane filter 130 disposed on the downstream side of the residual chlorine removal unit 120 passes the membrane and passes purified water into the central through hole 132 in the same way as a conventional membrane filter. The water is discharged to the purified water outlet 202 through the flow path, and the concentrated water that has not passed through the membrane is discharged to the concentrated water outlet 203 along the flow path 133 formed of a mesh network. At this time, the water discharged through the purified water outlet 202 is purified in the post carbon filter 114 through the purified water pipe (132 of FIG. 3) and stored in the tank 160, the concentrated water from the concentrated water outlet 203 is It is discharged to the drain pipe (131 of FIG. 3).

As such, the water purifier 100 of FIG. 3 equipped with the composite filter 200 of FIG. 4 may form a composite filter by modularizing the reverse osmosis membrane filter 130 and the residual chlorine removal unit 120. There is an advantage that no additional space is required for the installation of 120). In addition, since the residual chlorine removal unit 120 and the reverse osmosis membrane filter 130 are arranged in a line, flow channel resistance due to the installation of the residual chlorine removal unit 120 may be minimized.

Next, the composite filter 200 according to another embodiment of the present invention will be described with reference to FIG. 5.

In the composite filter 200 illustrated in FIG. 5, the reverse osmosis membrane filter 130 is longitudinally positioned at the inner center of the housing 210 through the fixing member 137, and the residual chlorine removal unit 120 is the reverse osmosis membrane. It has a structure disposed outside the filter 130. At this time, the residual chlorine removal unit 120 is accommodated in the chlorine removal material 121, such as copper zinc alloy (KDF) or calcium sulfite (CaSO ₃ ) accommodated therein.

5, the reverse osmosis pressure is such that water passing through the residual chlorine removal unit 120 flows along the inner surface of the housing 210 and flows from one end of the reverse osmosis membrane filter 130. A blocking member 136 may be provided to surround the outer circumferential surface of the membrane filter 130.

The reverse osmosis membrane filter 130 also passes through the membrane like a conventional membrane filter and discharges purified water introduced into the central through hole 132 to the purified water outlet 202 through the inner passage of the central rod 131, and passes through the membrane. Unconcentrated concentrated water is discharged to the concentrated water outlet 203 along a flow path formed of a mesh network.

As such, the water purifier 100 equipped with the composite filter 200 of FIG. 5 may form the reverse osmosis membrane filter 130 and the residual chlorine removal unit 120 as a modular filter to form the residual chlorine removal unit 120. The advantage is that no additional space is required for installation. In addition, since the water flowing into the reverse osmosis membrane filter 130 passes through the residual chlorine removal unit 120 installed in a long channel formed along the longitudinal outer circumferential surface of the reverse osmosis membrane filter 130, the residual chlorine removal unit 120 The contact with the contained copper zinc alloy (KDF) or calcium sulfite (CaSO ₃ ) is sufficient to obtain the advantage that the residual chlorine removal effect is increased.

In order to check the residual chlorine removal performance of the residual chlorine removal unit 120 itself, a residual chlorine removal test in the case where only the residual chlorine removal unit 120 is installed without an activated carbon filter was performed. Approximately 80% of residual chlorine was removed when using, and 100% of residual chlorine was confirmed when using calcium sulfite (CaSO ₃ ) as a chlorine removing material.

Therefore, it was confirmed that the residual chlorine removal unit 120 may be responsible for a substantial portion of the residual chlorine removal function that the previous activated carbon filter (precarbon filter) 112 was responsible for. Based on the experimental results, the activated carbon filter (free carbon filter) 112 is installed like the conventional reverse osmosis type water purifier, but the residual chlorine flowing into the reverse osmosis membrane filter 130 can be removed even if the capacity is greatly reduced. It could be confirmed.

Particularly, when the residual chlorine removal unit 120 including the copper zinc alloy (KDF) is used, the residual chlorine removal amount is about 80% when used as the residual chlorine removal unit 120 alone. When the activated carbon filter 112 having a smaller capacity than the activated carbon filter 12 installed in the conventional reverse osmosis water purifier 1 is installed, most of the residual chlorine is passed through the activated carbon filter 112 and the residual chlorine removal unit 120. It can be removed. In particular, since the life of copper zinc alloy (KDF) is about 10 times that of calcium sulfite (CaSO ₃ ) on the same volume basis, residual chlorine removal performance is maintained even after long-term use. 120, it is possible to maintain the membrane protection and performance of the reverse osmosis membrane filter 130 for a long time.

In particular, when the residual chlorine removal unit 120 is installed inside the composite filter 200, since the flow rate is small in the reverse osmosis membrane filter 130, water introduced into the residual chlorine removal unit 120 of the composite filter 200 is reduced. It can be confirmed that the effect of removing residual chlorine can be sufficiently achieved because it can be sufficiently in contact with copper zinc alloy (KDF) or calcium sulfite (CaSO ₃ ) to remove residual chlorine before entering the reverse osmosis membrane filter 130. there was.

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that the invention can be modified and modified in various ways without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

1 is a schematic diagram showing a water purifier of a general reverse osmosis method.

Figure 2 is a schematic diagram of a water purifier capable of removing residual chlorine by a chemical reaction according to an embodiment of the present invention.

Figure 3 is a schematic diagram of a water purifier capable of removing residual chlorine by a chemical reaction according to another embodiment of the present invention.

4 is a cross-sectional view showing an embodiment of a composite filter in which the residual chlorine removal unit and the reverse osmosis membrane filter are integrally formed according to the present invention.

5 is a cross-sectional view showing another embodiment of a composite filter in which the residual chlorine removal unit and the reverse osmosis membrane filter are integrally formed according to the present invention.

Description of the Related Art [0002]

100 ... Water purifier 110 ... Filter part

120 ... chlorine removal 130 ... reverse osmosis membrane filter

136 ... blocking member 160 ... tank

200 ... composite filter 201 ... inlet

202 ... Purification outlet 203 ... Condensate outlet

210 ... housing

Claims (6)

Activated carbon filter 112 to remove impurities through adsorption of activated carbon, and residual chlorine removal unit 120 including a chlorine removal material for removing residual chlorine contained in water passing through the activated carbon filter 112 by a chemical reaction And, filter unit 110 including a reverse osmosis membrane filter 130 for filtering the water passing through the residual chlorine removal unit 120; And Tank 160 for storing the water filtered in the filter unit 110; Purifier capable of removing residual chlorine by a chemical reaction comprising a. The method of claim 1, The residual chlorine removal unit 120 and the reverse osmosis membrane filter 130 is a water purifier capable of removing residual chlorine by a chemical reaction, characterized in that composed of a composite filter consisting of a single module. The method of claim 2, The composite filter 200 is characterized in that the residual chlorine removal unit 120 is disposed on the inlet 201 side, the reverse osmosis membrane filter 130 is disposed in series with the residual chlorine removal unit 120. Water purifier that can remove residual chlorine by chemical reaction. The method of claim 2, The composite filter 200 is the reverse osmosis membrane filter 130 is located in the longitudinal direction in the inner center of the housing 210, the residual chlorine removal unit 120 is disposed outside the reverse osmosis membrane filter 130 Purifier capable of removing residual chlorine by a chemical reaction, characterized in that. The method of claim 4, wherein The composite filter 200 is such that the water passing through the residual chlorine removal unit 120 flows along the inner surface of the housing 210 to flow from one end of the reverse osmosis membrane filter 130, the reverse osmosis membrane filter ( Water purifier capable of removing residual chlorine by a chemical reaction, characterized in that it comprises a blocking member 136 surrounding the outer peripheral surface of 130. The method according to any one of claims 1 to 5, The residual chlorine removal unit 120 is a residual by a chemical reaction, characterized in that the material containing a copper zinc alloy (KDF) or calcium sulfite (CaSO ₃ ) is received therein to remove the residual chlorine through a chemical reaction Water purifier with chlorine removal.

Images