WO2012005448A2

WO2012005448A2 - Block type flat membrane module

Info

Publication number: WO2012005448A2
Application number: PCT/KR2011/004091
Authority: WO
Inventors: 김창용
Original assignee: 이코리더 주식회사
Priority date: 2010-07-09
Filing date: 2011-06-03
Publication date: 2012-01-12
Also published as: KR101007878B1; WO2012005448A3

Abstract

Disclosed is a block type flat membrane module for filtering contaminated water. According to the present invention, the block type flat membrane module comprises: a pair of box-shaped housings for collecting filtered water to discharge the same to the outside; a plurality of filter media which are arranged side by side, are provided between the pair of housings, and comprise a pair of membranes and an inner material fused between the pair of membranes which have a plurality of pores; and a finishing member coupled to the upper and lower portions of the filter media. It is possible to reduce the thickness of the filter media and to prevent the deformation of the same by fusing the inner material between the pair of membranes to prepare the filter media, and it is possible to improve the integration of the filter media applied to the block type flat membrane module by integrating a plurality of filter media at regular intervals.

Description

Block type flat sheet module

The present invention relates to a flat membrane module, and more particularly, to a block-type flat membrane module to which a membrane filter used for pre-treatment and post-treatment of sewage treatment, sewage treatment, wastewater treatment, water purification treatment, reverse osmosis apparatus is applied. will be.

In general, purified water refers to a process of treating turbid water to purify it for drinking, industrial or agricultural use.

For example, tap water refers to a system for supplying reliable drinking water through a water pipe, and the drinking water finally supplied to the user through the water pipe must be purified according to water quality standards. Therefore, if it is possible to obtain high-quality raw water close to the target water quality, simple water treatment may be sufficient. However, water purification is not easy in the downstream part of a large river, which has many cities, factories, or farmland. Should be.

An example of such a water purifier is disclosed in Korean Patent Registration No. 10-372829 (registered on February 6, 2003).

1 is a plan view of a conventional water purifier, and FIGS. 2 and 3 are perspective views illustrating the operation of a filtration device included in the water purifier shown in FIG. 1.

Referring to FIG. 1, the conventional water purifier includes three filter parts for collecting suspended particles of filthy water pumped by the supply pump 1 and a supply pump 1 for pumping effluent containing suspended solids at a high or low pressure. 3; 3a, 3b, and 3c), and the filter unit (5) for receiving the water filtered by the filter unit 3 through the purified water pipe (4) to pass through only pure water and soluble substances to filter.

At this time, the filtration device 5 is provided with the first and second membranes (5a, 5b), and filtered through only pure water and soluble substances, the filtered water through the reducing pipe (6) the water tank (7) Supply to store in.

In the conventional water purifier, the water finally washed in the water tank 7 during the forward rotation is pumped out through the discharge pipe 7a, and the pure water in the water tank 7 is reversed through the reverse supply pipe 8 during the reverse rotation. A discharge / backwash pump 9 is further provided for supplying water to the first and

second membranes

5a and 5b to backwash.

However, in the filtration device according to Patent Document 1 applied to the water purification device as described above, as shown in FIG. 2A, the first and

second membranes

5a and 5b are easily damaged by using a flat membrane. There was a problem.

That is, since the first and

second membranes

5a and 5b are swollen into a bottle shape by high water pressure, as shown in FIG.

In the conventional filtration device 5, since the first and

second membranes

5a and 5b are deformed into the shape of the vial during the filtration, the area to be filtered is partially weighted, so that the dead zone (that is, dead space) There was also a problem of dead space.

In addition, when backwashing, the first and

second membranes

5a and 5b adhere to each other, so that backwashing may not be performed properly.

As a result, the filtration apparatus according to Patent Document 1 had to increase the installation intervals of the

membranes

5a and 5b in consideration of the swelling of the

membranes

5a and 5b.

The present invention is to solve the above problems, an object of the present invention is to provide a block-type flat membrane module that prevents deformation and breakage of the filter medium in the filtration process and backwashing process.

Another object of the present invention is to provide a block-type flat membrane module capable of improving the integration degree of the block-type flat membrane module by mounting a plurality of filter media.

According to a feature of the present invention for achieving the above object, a block-type flat membrane module according to an embodiment of the present invention is formed in a box shape of a pair of housings for recovering the filtered water and discharged to the outside; A filter medium installed between the pair of housings, the filter medium being bonded between a pair of membranes and the pair of membranes and having an inner material having a plurality of pores formed therein, the plurality of filter mediums arranged side by side; And a finishing member coupled to the upper and lower portions of the filter medium.

Block type flat membrane module according to another embodiment of the present invention, one housing is formed in a box shape for recovering the filtered water to be discharged to the outside; A filter medium installed in the housing, the filter medium being bonded between a pair of membranes and the pair of membranes and having an inner material having a plurality of pores formed therein, the plurality of filter mediums arranged side by side; A support member installed on one side of the housing opposite to the one housing and having a sealed structure that cannot penetrate water; And a finishing member coupled to the upper and lower portions of the filter medium.

The closing member is characterized in that formed in the shape of one side is opened so as to fit tightly in the upper and lower portion of the filter medium.

The inner material is characterized in that it is bonded between the pair of membranes by thermal fusion.

The housing may include a plurality of mounting holes formed to penetrate the filter material on one side thereof; A storage space formed in communication with the mounting hole; A discharge hole formed to communicate with the storage space on one surface of the housing; And characterized in that it comprises a discharge pipe coupled to the discharge hole to discharge the water stored in the storage space to the outside.

The mounting portion of the filter medium and the housing is characterized in that the sealing treatment by an adhesive or waterproof material.

The discharge pipe is characterized in that a pressure gauge for measuring and displaying the pressure of the water discharged to the outside by the pumping pressure of the pump, and a valve for opening and closing the water discharged through the discharge pipe.

Block type flat membrane module according to another embodiment of the present invention, is bonded between a pair of membranes and the pair of membranes, a plurality of pores formed therein to perform the flow path function of water filtered through the membrane One filter material having a member; And a housing coupled to the outside of the filter medium.

The housing has a storage space (S) is formed therein, the filter medium is inserted into a predetermined depth of the housing is installed, a portion of the housing is characterized in that the nipple for discharging the filtered water is installed It is done.

The housing is formed in a shape in which one side is opened to forcibly couple the bonded membrane and the inner material, and is sealed in a state of being bonded to the filter medium.

As described above, the present invention is to bond the inner material between a pair of membranes to produce a filter medium, it is possible to reduce the thickness of the filter medium and to prevent deformation.

In addition, the present invention may improve the degree of integration of the filter medium applied to the block-type flat membrane module by integrating a plurality of filter media at regular intervals.

In addition, in the present invention, since the deformation of the filter medium does not occur in the filtration process and the backwashing process, the dead space in which the filtration is not performed properly and the filtration is not carried out can be removed.

In addition, the present invention may be easily removed from the suspended matter stuck to the surface of the filter medium by supplying a high-pressure air instead of the backwash process using the backwash water.

1 is a plan view of a conventional water purifier.

2 and 3 are perspective views illustrating the operation of the filtering device included in the water purification device shown in FIG.

4 is a perspective view of a block-type flat membrane module according to a first embodiment of the present invention.

5 is an exploded perspective view of the filter medium and the housing shown in FIG. 4.

6 is an operational state diagram illustrating the filtration operation of the block-type flat membrane module according to the first embodiment of the present invention.

7 is a perspective view of a block-type flat membrane module according to a second embodiment of the present invention.

8 is a perspective view of a block-type flat membrane module according to a third embodiment of the present invention.

Hereinafter, a block-type flat membrane module according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view of a block-type flat membrane module according to a first embodiment of the present invention, Figure 5 is an exploded perspective view of the filter medium and the housing shown in FIG.

Various embodiments according to the present invention will be described without distinguishing water to be filtered, but it should be noted that the present invention can be applied to both a water purification device for filtering constants and a sewage treatment device for filtering sewage in a sewage treatment plant.

As shown in FIG. 4, the block-type flat membrane module 10 according to the first embodiment of the present invention has a plurality of filter media 20 and a plurality of filter media 20 that filter contaminated water to be purified. And a pair of housings 30 coupled to and forcibly discharging the filtered water through the plurality of filter media 20 to the outside using the pumping pressure of the pump 40.

As shown in FIG. 5, the filter medium 20 includes an inner member 22 bonded between the pair of membranes 21 and the pair of membranes 21, and the bonded membrane 21 and the inner member are combined. The outer surface of the 22 is finished by the closing member 23, both sides of the inner material 22 serves as a delivery hole 24 for delivering the water filtered through the membrane 21 to the housing 30. do.

Membrane 21 is a polytetrafluoroethylene (hereinafter referred to as "PTFE") membrane, polyamide (PA), poly Membranes of propylene (PP), polyvinylidene fluoride (PVDF), polysulfone (PSF), cellulose acetate (CA) systems are used. Among them, the PTFE membrane has properties such as almost perfect chemical inertness, heat resistance, non-tackiness, excellent insulation stability and low coefficient of friction.

The pore size of the membrane 21 has a size between several tens of micrometers and 0.001 micrometers depending on the characteristics of the water purifier to which the block type flat membrane module 10 is applied, and the thickness of the membrane 21 is about 10 micrometers. It is preferable.

The inner material 22 has a flow path function for moving the filtered water to the housing 30 through the membrane 21 through the pores therein, and the support member for supporting the filter material 20 to maintain a constant shape. Function

To this end, the inner material 22 is made of a synthetic resin material such as plastic, foamed polypropylene, or foamed polyethylene, and a plurality of pores are formed therein. For example, the thickness of the inner material 22 is 3 to 6 mm, particularly preferably about 5 mm.

The front and rear surfaces of the inner material 22 are wrapped by the membrane 21, as shown in FIG. 5. Since the melting point of the inner material 22 is lower than the melting point of the membrane 21 at about 160 ° C., about 260 ° C., when the inner material 22 is heated to 160 ° C. or higher, the inner material 22 melts the surface while melting the membrane 21. )do.

In the first embodiment of the present invention, the inner material 22 is described as being bonded to the membrane 21 by a thermal fusion method, but is not necessarily limited thereto. For example, in the present invention, the membrane 21 and the inner material 22 may be adhered to each other by applying an adhesive in the form of dots or nets to the outer surface of the inner material 22 and / or the inner surface of the membrane 21. You may join.

The filter medium 20 produced by joining the pair of membranes 21 and the inner material 22 therein is formed in a thin plate shape.

The closing member 23 is formed by using an ABS resin (Acrylonitrile Butadiene Styrene copolymer, hereinafter referred to as 'ABS resin') material, and having a long cross-section opening in a 'c' shape so that the filter material 20 is fitted to one side thereof. Is injection molded.

That is, the upper and lower portions of the filter medium 20 produced by joining the pair of membranes 21 and the inner material 22 therebetween at each of the two pairs of the opening members 23 forming the rectangular frame are interposed. The fittings are combined.

On the other hand, in the state in which the filter member 20 is coupled to the finish member 23, the gap between the finish member 23 and the filter medium 20 and each finish member 23 is in contact with each other is contaminated water and the filter medium 20 finishes. Sealing is preferably performed using at least one of an adhesive, a waterproofing agent, and a water repellent agent to prevent direct entry into the housing 30 through a gap between the members 23.

In the present embodiment, both side surfaces of the inner material 22 are formed in an open state without a finishing process using the finishing member 23. Accordingly, the present invention performs a filtration performance by performing the function of the transfer hole 24 to transfer the water filtered through the membrane 21 and the inner material 22 to the housing 30 as a whole of the inner material (22). Can be improved.

However, the present invention is not necessarily limited thereto. That is, the present invention may be modified so as to forcibly couple the finishing member 23 to both sides of the filter medium 20, and to pass through the delivery hole 24 to the finishing member 23 coupled to both sides of the filter medium 20. It may be. Accordingly, the present invention can deliver the filtered water through the filter medium 20 to the housing 30 by using the delivery hole 24 of the closing member 23 coupled to both sides of the filter medium 20.

As shown in FIG. 5, the housing 30 is provided in a pair formed in a box shape using a plastic material to be coupled to both sides of the plurality of filter media 20.

In detail, the housing 30 is formed in communication with a plurality of mounting holes 31 and mounting holes 31 in which a plurality of filter media 20 are mounted on one side, so that the delivery hole 24 of the filter media 20 is formed. It has a storage space 32 for storing the water to be transmitted through and the discharge hole 33 is formed to pass through to discharge the water stored in the storage space 32 to the outside.

As shown in FIG. 5, the mounting hole 31 is formed to extend in the vertical direction so that the filter medium 20 may be mounted, and the filter medium 20 and the mounting hole 31 after the filter medium 20 is mounted. In order to prevent the contaminated water from flowing into the storage space 32 through the gap between the seals, the sealant may be sealed using at least one of an adhesive, a waterproofing agent, and a water repellent agent.

The present invention can adjust the size of the mounting hole 31 and the distance between the mounting hole 31 according to the installation conditions of the water purifier to apply the block-type flat membrane module 10, the mounting hole 31 in the left and right directions It may be changed to form a long extension.

As shown in FIG. 5, the discharge hole 33 is formed in communication with the storage space 32 on the front of the pair of housings 30, and the discharge pipe 34 is coupled to the discharge hole 33.

The discharge pipe 34 may be a rubber hose, a metal pipe, or a mixture thereof according to the condition that the block-type flat membrane module 10 is applied.

The pump 40 receives an external power source to drive a motor provided therein to generate a pumping pressure for discharging water stored in the storage space 32 of the housing 30 to the outside through the discharge pipe 34.

That is, the pump 40 generates a pressure for pumping the water stored in the storage space 32 to the outside, so that the contaminated water in the tank is forced to be filtered through the filter medium 20 by the pumping pressure. .

The pressure gauge 41 measures and displays a pressure for discharging water to the outside by the pumping pressure generated by the pump 40 in the discharge pipe 34 between the discharge hole 33 and the pump 40 of the housing 30. And a valve 42 that opens and closes to adjust the amount of water discharged through the discharge pipe.

Accordingly, the present invention can control the filtration performance of the filter medium 20 by controlling the pumping operation of the pump 40 in accordance with the pressure displayed on the pressure gauge (41).

Next, the coupling relationship of the block-type flat membrane module according to the first embodiment of the present invention will be described in detail.

First, the coupling relationship between the filter medium 20 and the housing 30 will be described with reference to FIG. 5.

The filter medium 20 is manufactured by wrapping the front and rear surfaces of the inner material 22 with a pair of membranes 21 and bonding them in a thermal fusion method.

Subsequently, the upper, lower, right and left portions of the manufactured filter medium 20 are combined with the finishing member 23 made of ABS resin to finish the treatment. At this time, the closing member 23 is formed in a long elongated shape by opening in a 'c' shape so that the filter medium 20 is fitted on one side, and is formed by joining the membrane 21 and the inner material 22. Fit the filter medium 20 to the open portion of the closing member 23. And it is preferable to seal the gap between the finish member 23 and the filter medium 20 to prevent contaminated water from flowing into the filter medium 20 through the gap between the finish member 23 and the filter medium 20. Do.

The pair of housings 30 are coupled to both sides of the plurality of filter media 20 manufactured as described above. At this time, the filter medium 20 is mounted in the mounting hole 31 of the housing 30, and then the sealing hole is treated between the mounting hole 31 and the filter medium 20.

As a result, the finishing member 23 is coupled to the upper and lower surfaces of the filter medium 20, and the left and right surfaces of the filter medium 20 are mounted in the mounting holes 31 and then sealed, so that the membrane of the filter medium 20 is sealed. Water filtered through the 21 is prevented from being discharged to the outside of the filter medium 20 through the upper surface, the lower surface, the left side and the right side of the filter medium 20.

Delivery holes 24 formed on both sides of the filter medium 20 deliver the filtered water to the storage space 32 of the housing 30.

The discharge pipe 34 is connected to the discharge hole 33 formed in the upper front of the pair of housings 30, and the hydraulic system 41 and the valve 42 are installed in the discharge pipe 34.

Next, the operation of the block-type flat membrane module according to the first embodiment of the present invention will be described in detail.

First, the filtration operation of the block-type flat membrane module according to the first embodiment of the present invention will be described with reference to FIG. 6.

A plurality of filter medium 20 is installed so as to be completely immersed in a water bath containing the water to be filtered block-type flat membrane module 10 mounted in the vertical direction. The reason why the block-type flat membrane module is completely wound on the water tank is that a part of the membrane 21 of the filter medium 20 is not completely submerged in water so that the block-type membrane module is completely exposed to the air. Through the air to the inside of the housing 30 through to prevent the filtration efficiency is lowered.

When power is supplied to the pump 40, the pump 40 generates a pumping pressure while the motor provided in the pump 40 is driven, and the pumping pressure is transmitted to the housing 30 through the discharge pipe 34. .

Then, the filter medium 20, as shown by the arrow in Figure 6, to suck the contaminated water, the membrane 21 in this process to filter the contaminated water, suction the filtered water only to the internal material ( 22).

The inner material 22 delivers the filtered water to the housing 30 through the pores formed therein, and the housing 30 stores the filtered water in the storage space 32 therein and simultaneously discharges the discharge pipe 34. Discharge through.

At this time, the operator checks the pressure displayed on the pressure gauge 41 connected to the discharge pipe 34, and controls the motor drive of the pump 40 so that the pressure does not rise above the preset reference pressure. When the pumping pressure of the pump 40 rises above the reference pressure, the contaminated water is sucked into the filter medium 20 by the pumping pressure in a state where the contaminated water is not sufficiently filtered through the filter medium 20, and thus the filtration efficiency is increased. This is because it is degraded.

Next, the back washing operation of the block-type flat membrane module according to an embodiment of the present invention will be described.

Backwashing is performed periodically to remove debris from residual suspended matter that has adhered to the membrane 21 surface of the filter media 20. That is, the reverse rotation of the pump 30 to supply the backwash water to the housing 30 through the discharge pipe 34, the storage space 32 of the housing 30 and the delivery hole 24 of the filter medium 20 is The backwash water is delivered to the inner material 22.

Then, the inner material 22 functions as a flow path for moving the backwash water in the reverse direction during the filtration operation to supply the backwash water to the membrane 21, and the internal pressure of the filter medium 20 is higher than the pressure outside the filter medium 20. As a result, the membrane 21 performs filtration in the reverse direction of the filtration process.

As a result, in the process of passing the backwash water supplied to the inner material 22 through the membrane 21, the floating residue adhered to the surface of the membrane 21 may be separated from the surface of the membrane 21.

Meanwhile, the present invention may perform the backwash operation of the membrane 21 by using high pressure air or using high pressure air and backwash water together without using the backwash water.

As shown in FIG. 7, the block-type flat membrane module according to the second embodiment of the present invention has one housing 30. Since the other components have the same or similar functions as those of the block-type flat membrane module according to the first embodiment of the present invention, the same reference numerals are used.

Support member 120 is installed on one side facing the one housing 30, the support member 90 has a closed structure that can not penetrate water.

Therefore, the block-type flat membrane module according to the second embodiment of the present invention has a structure that can be discharged after the water filtered through the plurality of filter media 20 is stored in the housing 30.

As shown in FIG. 8, the block-type flat membrane module 100 according to the third embodiment of the present invention includes one filter medium 120 and a housing 130 in which the filter medium 120 is installed. The housing 130 has a rectangular frame shape and a storage space S is formed therein.

Of course, the shape of the housing 130 may be formed in any form other than square.

The filter medium 120 is inserted and installed to a predetermined depth inside the housing 130, and the remaining space after the filter medium 120 is installed is a storage space S of the housing 130.

A portion of the housing 130 is provided with a nipple 240 for discharging filtered water, and the nipple 240 is coupled with a pipe to discharge the filtered water.

Detailed description of the same components as those described in the first embodiment of the present invention will be omitted.

The block-type flat membrane module according to the second embodiment of the present invention includes a plurality of filter media and housings as in the first embodiment of the present invention because a small amount of water to be filtered or a space in a water tank in which water is stored is narrow. If the block-type flat membrane module 10 is not available, it can be easily used.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

In the above embodiments, the filter medium has been described as being formed in a plate shape, but the present invention is not necessarily limited thereto. That is, the filter medium has a flexible feature as the inner material is fused between a pair of membranes. Therefore, when the block-type flat membrane module is formed in a cylinder, the filter medium may be changed into a disc shape or a spiral shape.

And the filter medium has been described as being produced by heating and fusing a pair of membrane and the inner material therebetween, the present invention is not necessarily limited thereto. For example, the present invention may bond the membrane and the inner material by applying an adhesive in the form of a dot or a net to the outer surface of the inner material and / or the inner surface of the membrane.

In addition, the backwashing operation was described as using an external backwashing water. However, the backwashing water and the high pressure air may be used together or the filter medium may be washed using only the high pressure air.

In addition, in the above embodiments, the immersion type using the pumping pressure for sucking by installing a pump at the rear end of the filter medium, but the present invention is not necessarily limited thereto.

That is, the present invention may apply the pressure type method by changing the position of the pump to supply the contaminated water to the sealed water tank or the direct filter medium.

Claims

A pair of housings formed in a box shape to recover filtered water and to be discharged to the outside;

A filter medium installed between the pair of housings, the filter medium being bonded between a pair of membranes and the pair of membranes and having an inner material having a plurality of pores formed therein, the plurality of filter mediums arranged side by side; And

Finishing members coupled to the upper and lower portions of the filter medium;

Block-type flat membrane module comprising a.
A housing formed in a box shape to recover filtered water and to be discharged to the outside;

A filter medium installed in the housing, the filter medium being bonded between a pair of membranes and the pair of membranes and having an inner material having a plurality of pores formed therein, the plurality of filter mediums arranged side by side;

A support member installed on one side of the housing opposite to the one housing and having a sealed structure that cannot penetrate water; And

Finishing members coupled to the upper and lower portions of the filter medium;

Block-type flat membrane module comprising a.
The method according to claim 1 or 2,

The finishing member

Block-type flat membrane module, characterized in that formed on the one side opening shape so as to fit in the upper and lower portions of the filter medium.
The method according to claim 1 or 2,

The inner member is a block-type flat membrane module, characterized in that bonded between the pair of membranes by thermal fusion.
The method of claim 1 or 2, wherein the housing,

A plurality of mounting holes formed to penetrate through the filter material on one side thereof;

A storage space formed in communication with the mounting hole;

A discharge hole formed to communicate with the storage space on one surface of the housing; And

And a discharge pipe coupled to the discharge hole to discharge the water stored in the storage space to the outside.
The block-type flat membrane module according to claim 5, wherein the mounting portion of the filter medium and the housing is sealed by an adhesive or a waterproof material.
The method of claim 5, wherein the discharge pipe

A pressure gauge for measuring and displaying the pressure of water discharged to the outside by the pumping pressure of the pump;

Block type flat membrane module, characterized in that the valve for opening and closing the water discharged through the discharge pipe is installed.
A filter medium bonded between a pair of membranes and the pair of membranes and having an inner material having a plurality of pores formed therein so as to perform a flow path function of water filtered through the membrane; And

It includes; housing coupled to the outside of the filter medium,

The housing has a storage space (S) is formed therein, the filter medium is inserted into a predetermined depth of the housing is installed, a portion of the housing is characterized in that the nipple for discharging the filtered water is installed Block type flat membrane module.
The method of claim 8,

The housing is a block-type flat membrane module, characterized in that the one side is formed in a shape that is open to forcibly couple the bonded membrane and the inner material, the sealing treatment in a state coupled to the filter medium.