CN111867700A - Integrated composite filter module for water purifier - Google Patents

Abstract

The present invention relates to an integrated composite filter module for a water purifier, and more particularly, to an integrated composite filter module for a water purifier, which can remarkably reduce the volume of the water purifier while securing excellent salt removal rate and permeation flow rate.

Description

Integrated composite filter module for water purifier

technical field

The present invention relates to an integrated composite filter module for a water purifier, and more particularly, to an integrated composite filter module for a water purifier that can ensure excellent salt removal rate and permeate flow rate while significantly reducing purified water volume of the device.

Background technique

With the development of purification and sewage treatment technology, the direction of treatment technology is changing from the existing sand filtration method to the membrane filtration method using separation membranes.

This separation membrane technology is a high-level separation technology that almost completely separates and removes the treatment target substance present in the treated water based on the pore size, pore distribution, and membrane surface charge of the membrane.

According to the size of pores, the above separation membranes are classified into precision filtration membranes (MF membranes), ultrafiltration membrane systems (UF membranes), nano-separation membranes (NF membranes) and reverse osmosis membranes (RO membranes). The scope is expanded to the production of high-quality drinking water and industrial water, wastewater treatment and reuse, and purification production processes related to the development of non-discharge systems, etc., and is widely used as one of the core technologies that attract attention in the 21st century. In fact, the tap water supplied after being purified is treated by a water purifier for drinking in most of the citizens, and therefore, further development of technologies related to this is required.

The water purifier system consists of a separation membrane module, pre-treatment and post-treatment filters, pumps, piping, tanks and other auxiliary devices. The most important part of the elements that make up the above system is the separation membrane module. As the types of separation membrane modules, flat plate type, hollow fiber type, tubular type, spiral wound type, etc. are commercialized, and research is mainly on spiral wound separation membrane modules that have high insertion density of separation membrane per unit area and can remove ions from water. . Moreover, recently, research to simplify the water purifier system is being actively conducted.

The structure of the existing reverse osmosis water purifier consists of a water intake valve, a sediment filter, a front activated carbon filter, a booster pump, a polyamide composite membrane, a rear activated carbon filter, a backflow prevention valve, a domestic water control valve and Water purification valve and other components.

The sediment filter functions to remove large impurities such as suspended matter, sand, rust residues and moss from the raw water, and the pre-activated carbon filter removes volatile organic compounds such as pesticides and carcinogens from the raw water. In order to prevent the polyamide composite membrane at the rear end from being oxidatively decomposed due to residual chlorine, the residual chlorine is removed. The polyamide composite membrane has the function of filtering out organic pollutants, inorganic pollutants, bacteria, viruses, ionic substances including heavy metals, etc. contained in the raw water, and the activated carbon filter behind it can remove gaseous substances contained in the raw water. The odor of water, the function of improving the taste of water.

The reverse osmosis water purifier filter composed of the previous sediment filter, pre-activated carbon filter, polyamide composite membrane and post-activated carbon filter consists of 4 filters, so it is difficult to filter in the filter due to its large size. Used in tight spaces and difficult to apply to applications that require ultra-thin designs.

Also, because it is difficult to determine the filter life or replacement time, and the filter (sediment filter, pre-activated carbon filter, polyamide composite membrane, post-activated carbon filter) installed in the filter part of the reverse osmosis water purifier. Complexity, there is a problem that it is difficult for users to replace by themselves.

As a patent for solving these problems, Korean Laid-Open Patent Publication No. 10-2004-0042180 relates to the simplified filter housing described above, which incorporates a sediment filter, a pre-activated carbon filter, and a reverse osmosis separation membrane filter. , The rear activated carbon filter and multiple interconnected pipes are minimized to accommodate all of them in one filter housing, so that the volume of the water purifier is reduced compared to the past, and the filter can be easily replaced by consumers. Since a plurality of filters inserted into the above-mentioned filter housings are adjusted in volume to make the exchange cycle uniform, consumers can easily replace the filter housings themselves. However, the sediment filter, the pre-activated carbon filter, the reverse osmosis filter, and the rear activated carbon filter inside the filter housing are composed of their respective housings, so that there is a limitation in reducing the volume of the water purifier.

SUMMARY OF THE INVENTION

technical problem

The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide an integrated composite filter module for a water purifier which can ensure excellent salt removal rate and permeate flow rate, and at the same time reduce the water purifier significantly. volume of.

Also, another object of the present invention is to provide a water purifier having a remarkably small size including an integrated composite filter module.

Technical solutions

In order to solve the above-mentioned problems, the present invention provides an integrated composite filter module for a water purifier. The integrated composite filter module for a water purifier includes: a first filter part including an outer cover and a sediment filter, and the outer cover is provided with a an inflow port into which raw water flows, the sediment filter is installed in the outer cover; and a second filter part is arranged inside the first filter part and is used to filter the water that has passed through the first filter part for the first time For secondary filtration, the second filtration part includes: an inner cover, which is provided with a production water discharge port and a concentrated water discharge port; a polyamide reverse osmosis membrane module; inside.

According to an embodiment of the present invention, the above-mentioned polyamide reverse osmosis membrane module may be a chlorine-resistant polyamide reverse osmosis membrane module.

In addition, according to an embodiment of the present invention, the raw water can move along the raw water flow path provided between the inner surface of the outer cover and the outer surface of the upper sediment filter, and the water filtered for the first time can move along the It moves according to the permeated water flow path provided between the inner surface of the sediment filter and the outer surface of the inner cover. Furthermore, according to an embodiment of the present invention, the rear activated carbon filter may be in a form in which activated carbon is filled inside the central pipe of the polyamide reverse osmosis membrane module.

Furthermore, according to an embodiment of the present invention, a sealing member having a predetermined thickness may be formed between the inner surface of the inner housing and the outer surface of the polyamide reverse osmosis membrane module.

Furthermore, according to an embodiment of the present invention, under normal temperature conditions, when the residual chlorine concentration is 0.5 ppm, the conductivity is 250 μS/cm, and the pressure is 40 psi, the permeation flow rate of the raw water flowing through the inflow port can be 12.0 GFD above.

Also, according to an embodiment of the present invention, the above-mentioned sediment filter may include a carbon material for removing volatile organic substances in the above-mentioned raw water.

Furthermore, according to an embodiment of the present invention, the present invention provides a water purifier including an integrated composite filter module for a water purifier.

effect of invention

The integrated composite filter module for a water purifier of the present invention has the effect of ensuring an excellent salt removal rate and permeation flow rate, while significantly reducing the volume of the water purifier, so that it can be used even in a narrow space.

Description of drawings

1 is a cross-sectional perspective view and an XX' cross-sectional view of an integrated composite filter module for a water purifier according to an embodiment of the present invention.

2 is a cross-sectional exploded perspective view of a polyamide reverse osmosis membrane module included in an integrated composite filter module for a water purifier according to an embodiment of the present invention.

Detailed ways

Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art to which the present invention pertains can easily implement the present invention. The present invention may be embodied in many different forms, and the present invention is not limited to the embodiments described herein.

The integrated composite filter module 10 for a water purifier of the present invention includes: a first filter part including an outer cover and a sediment filter, the outer cover 11 is provided with an inflow port 19a through which raw water flows, and the sediment filter 13 is provided In the above-mentioned outer cover 11; the second filter part is arranged on the inner side of the above-mentioned first filter part, and is used to perform secondary filtration on the water that has been filtered for the first time through the above-mentioned first filter part, and the above-mentioned second filter part includes: The inner cover 15 is provided with a produced water outlet 19b and a concentrated water outlet 19c; a polyamide reverse osmosis membrane module 17;

On the other hand, the above-mentioned polyamide reverse osmosis membrane module 17 may be a chlorine-resistant polyamide reverse osmosis membrane module. More specifically, the present invention can provide an integrated composite filter module that can use chlorine-resistant polyamide The reverse osmosis membrane module is used to omit the pre-activated carbon filter, and the second filter part that can perform both the filtration based on the reverse osmosis membrane and the residual chlorine removal function based on the post-installed activated carbon filter is installed in the first filter part, so as to ensure that the passage of The water filtered by the first filter part moves directly to the space of the second filter part, preferably, the water filtered for the first time by the above-mentioned sediment filter passes between the outer side of the inner housing and the inner side of the sediment filter. The permeated water flow path between the two filters directly flows into the above-mentioned polyamide reverse osmosis membrane module, whereby the existing multiple filters for water purifiers arranged in series can be integrated to remarkably reduce the volume of the water purifier, and at the same time, excellent permeation can be ensured Flow rate and salt removal rate.

Hereinafter, the integrated composite filter module described above will be described with reference to FIG. 1 , which is a cross-sectional perspective view of an integrated composite filter module according to a preferred embodiment of the present invention.

First, raw water, for example, tap water, can be supplied through the inflow port 19a of the outer cover 11 . The raw water flowing in through the inflow port 19a moves through the raw water flow path 12 provided between the inner surface of the outer cover 11 and the outer surface of the sediment filter 13, and is continuously filtered through the sediment filter 13 for the first time.

The material of the above-mentioned outer cover can be used without limitation as the material generally used for the outer cover of the filter for water purifiers in the technical field to which the present invention pertains. The form of the structure can be changed into various forms, and as an example, the form of a circular tube can be adopted.

The material of the above-mentioned sediment filter can be the material commonly used in the sediment filter for water purifiers in the technical field to which the present invention pertains, and the shape can be in the form of a circular tube, but is not limited thereto. The above-mentioned sediment filter can remove large impurities such as floating matter, sand, rust residue and moss in the water, and the above-mentioned sediment filter can contain carbon material for removing volatile organic compounds in the above-mentioned raw water. The above-mentioned carbon material can be a material used for removing volatile organic substances in the technical field of the present invention. As an example, it can be activated carbon or activated carbon powder, but it is not limited thereto.

The water filtered for the first time can move to the end of the inner cover 15 through the permeated water flow path 14 provided between the outer surface of the inner cover 15 and the inner surface of the sediment filter 13 to be reversed to the polyamide of the second filter part. The permeable membrane module 17 flows in.

In addition, since the sealing member 16 can be formed between the inner surface of the inner cover 15 and the polyamide reverse osmosis membrane module, the water filtered through the sediment filter for the first time can be returned to the second filter section without loss. The permeable membrane module is moved.

As the material of the above-mentioned inner casing, the material generally used for the casing of the reverse osmosis membrane module in the technical field to which the present invention pertains can be used without limitation.

Preferably, the above-mentioned sealing member may be a brine seal of ethylene propylene terpolymer (Etyhlene Propylen Terpolymer) material, but is not limited thereto.

The chlorine-resistant polyamide reverse osmosis membrane module filtration removes organic contaminants, inorganic contaminants, bacteria, viruses, and ionic substances including heavy metals and the like in the raw water flowing from the sediment filter. In addition, compared with the conventional polyamide reverse osmosis membrane, the durability against chlorine is strong, so that the pre-activated carbon filter for removing residual chlorine can be omitted, and a chlorine-resistant polyamide reverse osmosis membrane that can remove a part of residual chlorine can be installed. Permeate the central shrink tube in the membrane module to perform secondary filtration of water containing residual chlorine.

Preferably, the above-mentioned polyamide reverse osmosis membrane module may include an alkylated polyamide composite membrane that permeates more than 20% of the residual chlorine in the raw water, when the above-mentioned alkylated polyamide composite membrane makes a sodium hypochlorite solution with a concentration of 500 ppm to 2000 ppm At least 85% removal performance can be maintained through 1 hour to 24 hours. The trace residual chlorine contained in the second filtered water can remove microorganisms or viruses, etc. existing in the post-activated carbon filter, and at the same time, it can also remove gaseous substances, remove the odor of water, and improve the taste of water.

The shape of the above-mentioned polyamide reverse osmosis membrane module can be the structure of a reverse osmosis module commonly used in the technical field to which the present invention pertains. The spiral wound type is wound around a central shrink tube, and may include end caps for the purpose of dimensional stability of the separation membrane wound around both ends of the wound membrane.

FIG. 2 is a cross-sectional exploded perspective view of the polyamide reverse osmosis membrane module 20 included in the integrated composite filter module for a water purifier according to an embodiment of the present invention.

Referring to FIG. 2 , the polyamide reverse osmosis membrane 21 can be wound around the central shrinking tube 24 in a spiral winding type, and between the wound polyamide reverse osmosis membranes 21 can be arranged: an outer spacer 23 , which acts as the first The function of the flow path of the secondary filtered water and the function of improving the contact efficiency of the outer side of the reverse osmosis membrane; The activated carbon filter 25 moves efficiently.

The material and shape of the outer spacer 23 and the inner spacer 22 can use the structure of a reverse osmosis membrane module known in the technical field to which the present invention pertains.

For tap water with a residual chlorine concentration of 0.5 ppm and a conductivity of 250 μS/cm, when the above-mentioned raw water flows in at a pressure of 40 psi, the raw water permeation flow rate can be 12.0 GFD or more.

Next, the water filtered for the second time by the above-mentioned polyamide reverse osmosis membrane module 17 is moved to the rear activated carbon filter 18 , and the produced water that can remove trace residual chlorine at the end of the rear activated carbon filter 18 is set at the lower end of the inner cover 15 The produced water is discharged from the discharge port 19b. And, in the second filtered water, the concentrated water other than the production water can be discharged through the concentrated water discharge port 19c provided at the lower end of the inner casing 15 .

The above-mentioned rear activated carbon filter 18 may be in a form in which activated carbon is filled in the central shrinking tube of the above-mentioned polyamide reverse osmosis membrane module 17 . The particle size and filling rate of the above-mentioned activated carbon can use the structure of the post-installed activated carbon filter commonly used in the technical field to which the present invention belongs.

In addition, in the integrated composite filter module for a water purifier of the present invention, under normal temperature conditions, the raw water flowing in through the inflow port is under the conditions of a residual chlorine concentration of 0.5 ppm, a conductivity of 250 μS/cm, and a pressure of 40 psi. The permeate flow may be above 12.0 GFD.

On the other hand, the present invention provides a water purifier including the integrated composite filter module for a water purifier of the present invention. In addition to the integrated composite filter module for a water purifier included in the water purifier of the present invention, structures such as the main body, the drain pipe, the drain pipe, and the drip tray can be replaced by well-known structures commonly used in the technical field to which the present invention pertains. The existing in-line water purifier filter can use the integrated composite filter module for the water purifier of the present invention to embody a compact water purifier whose volume is significantly smaller than the existing water purifier.

Preparation example 1

A chlorine-resistant polyamide reverse osmosis membrane module was manufactured using a chlorine-resistant polyamide membrane in the form of a spiral wound module having a diameter of 1.8 inches and an effective membrane area of 4.8 ft ² .

Example 1

Activated carbon was filled into the central shrinkage tube in the chlorine-resistant polyamide reverse osmosis membrane module manufactured in Preparation Example 1, and the inner cover provided with the rear activated carbon filter in the reverse osmosis membrane module described above was combined with the outer cover including the sediment filter. housing to manufacture an integrated composite filter module.

Comparative Example 1

The sediment filter, the chlorine-resistant polyamide reverse osmosis membrane module produced in Preparation Example 1, and the post-installed activated carbon filter were arranged in series, and the filters were connected by a drain pipe to produce a filter module.

Experimental example 1

The volumes other than the piping of the filter modules manufactured in the Examples and Comparative Examples were calculated and presented in Table 1 below.

【Table 1】

distinguish Volume of filter module cm³ Example 1 1331 Comparative Example 1 2556

Referring to the above Table 1, the volume of the filter module of Comparative Example 1 in which the sediment filter, the reverse osmosis membrane module and the rear activated carbon filter are arranged in series is about 192% of the volume of the one-piece composite filter module (Example 1). It can be confirmed that the volume is significantly larger than the one-piece composite filter module.

Experimental example 2

1) Salt removal rate

The filter modules manufactured in Example 1 and Comparative Example 1 were used, and tap water with a residual chlorine concentration of 0.5 ppm and a conductivity of 250 μS/cm at room temperature was used as raw water to operate under a pressure of 40 psi. . The above-mentioned operation method is as follows, that is, after repeating the operation for 12 hours, the 12-hour trip is stopped, and the operation is continued for 60 days. Finally, the salt removal rate was determined and the results are presented in Table 2 below.

【Table 2】

Referring to Table 2 above, it can be confirmed that the integrated composite filter module of Example 1 can have the same level of salt removal rate as that of Comparative Example 1 in which each filter is arranged in series even in a very small volume.

2) Determination of production flow

The filter modules manufactured in Example 1 and Comparative Example 1 were used, and tap water with a residual chlorine concentration of 0.5 ppm and a conductivity of 250 μS/cm at room temperature was used as raw water to operate under a pressure of 40 psi. . The above-mentioned operation method is as follows, that is, after repeating the operation for 12 hours, the 12-hour trip is stopped, and the operation is continued for 60 days. Finally, the salt removal rate was determined and the results are presented in Table 3 below.

【table 3】

Referring to the above Table 3, compared with the module of Comparative Example 1 in which each filter is arranged in series, it can be confirmed that even if the integrated composite filter module of Example 1 has a very small volume, the initial production water flow rate and the production water flow rate after 60 days are: A significantly higher level of 120%. This is because when the filters are arranged in series, when the water discharged from each filter moves to the filter of the next step, the flow rate of produced water decreases due to the pressure loss that occurs in the piping. When the filter is composed of an integrated composite filter module, the reduction in the flow rate of the produced water due to the pressure loss occurring in the piping can be minimized, and the flow rate of the produced water can be increased.

An embodiment of the present invention has been described above, but the idea of the present invention is not limited to the embodiment proposed in this specification. Those of ordinary skill in the technical field to which the present invention pertains who understand the idea of the present invention may, within the scope of the same idea, Other embodiments can be easily proposed by addition, change, deletion, addition, etc. of structural elements, but this also falls within the scope of the idea of the present invention.

Claims (8)

1. An integrated composite filter module for a water purifier, characterized in that,

the method comprises the following steps:

a first filter unit including an outer housing provided with an inflow port through which raw water flows, and a sediment filter provided in the outer housing; and

a second filtering part arranged at the inner side of the first filtering part for performing secondary filtering on the water primarily filtered by the first filtering part,

the second filter portion includes:

an inner housing provided with a produced water discharge port and a concentrated water discharge port;

a polyamide reverse osmosis membrane module; and

and the rear active carbon filter is arranged at the inner side of the polyamide reverse osmosis membrane module.

2. The integrated composite filter module for a water purifier according to claim 1, wherein the polyamide reverse osmosis membrane module is a chlorine-resistant polyamide reverse osmosis membrane module.

3. The integrated composite filter module for a water purifier as recited in claim 1, wherein the raw water moves along a raw water flow path provided between an inner surface of the outer housing and an outer surface of the upper sediment filter, and the primarily filtered water moves along a permeate flow path provided between the inner surface of the sediment filter and the outer surface of the inner housing.

4. The integrated composite filter module for a water purifier according to claim 1, wherein the post-activated carbon filter is in a form in which activated carbon is filled inside a central shrinkage tube of the polyamide reverse osmosis membrane module.

5. The integrated composite filter module for a water purifier according to claim 1, wherein a sealing member having a predetermined thickness is formed between an inner surface of the inner housing and an outer surface of the polyamide reverse osmosis membrane module.

6. The integrated composite filter module for water purifier as claimed in claim 1, wherein the permeate flow rate of raw water flowing through the inlet is 12.0GFD or more under the conditions of a residual chlorine concentration of 0.5ppm, a conductivity of 250 μ S/cm and a pressure of 40psi at normal temperature.

7. The integrated composite filter module for a water purifier according to claim 1, wherein the sediment filter comprises a carbon material for removing volatile organic substances in the raw water.

8. A water purifier comprising the integrated composite filter module for a water purifier according to any one of claims 1 to 7.

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