KR100592083B1 - Apparatus for filtering using variable filter - Google Patents

Abstract

The present invention relates to a variable filter filtration device, and an object thereof is to provide a variable filter filtration device for forming a compression unit that can concentrate the pressure in the center of the filtration device in order to be able to compress the fiber yarn by hydraulic pressure. It is elongated in the longitudinal direction, the raw water is formed in the lower portion and the raw water outlet 12 is formed in the upper portion of the filtration device body 10 through which the raw water passes, and the raw water inlet 11 and raw water outlet 12 ) Is installed between, and the position of the fiber yarn 21 consisting of a plurality of weft yarns, the upper net 22 is fixedly installed on the upper side of the fiber yarn 21 and the lower side of the fiber yarn 21 can be changed The variable filter unit 20 is formed of a lower net 23 is installed so that the variable filter unit 20 by the raw water flowing into the raw water inlet 11 is installed on the lower side of the variable filter unit 20. It includes a compression unit 30 to compress.

Variable Filter, Compression, Fiber Yarn, Filter, Raw Water

Description

Apparatus for filtering using variable filter}

1 is a view showing a filtration device having a variable filter layer according to the prior art.

Figure 2 is a cross-sectional view showing the overall structure of the first embodiment of the variable filter filtration device according to the present invention, a view showing a state before the fiber yarn is compressed.

Figure 3 is a cross-sectional view showing the overall structure of the first embodiment of the variable filter filtration device according to the present invention, a view showing a state after the fiber yarn is compressed.

4 is a view showing a state in which the fiber yarn in the variable filter filtration device according to the present invention.

5 is a perspective view of a state in which the fiber winding in the variable filter filtration device according to the present invention.

Figure 6 is a perspective view of the upper, lower net in the variable filter filtration device according to the present invention.

Figure 7 is a perspective view of the upper, lower net in the variable filter filtration device according to the present invention.

8 is a view showing another embodiment of the fiber yarn according to the present invention.

9 is a cross-sectional view showing the overall structure of a second embodiment of a variable filter filtration device according to the present invention, showing a state before the fiber yarn is compressed.

10 is a cross-sectional view showing the overall structure of a second embodiment of a variable filter filtration device according to the present invention, showing the state after the fiber yarn is compressed.

FIG. 11 is a cross-sectional view taken along the line AA of FIG. 10. FIG.

12 is a cross-sectional view showing the overall structure of a third embodiment of a variable filter filtration device according to the present invention, showing a state before the fiber yarn is compressed.

Figure 13 is a cross-sectional view showing the overall structure of a third embodiment of a variable filter filtration device according to the present invention, a state after the fiber yarn is compressed.

14 is a cross-sectional view taken along the line BB of FIG. 13.

(Explanation of symbols for the main parts of the drawing)

10: filtration unit body 11: raw water inlet

12: raw water outlet 20: variable filter unit

21: fiber yarn 21,22: upper and lower net

30: compression unit 31: compression member

31a: through hole 31b: first flange

32: switch member 32a: cylindrical member

32b: opening and closing line 33: second compression member

33a: second flange 33b: third flange

33c: inlet 33d: outlet

33e: Euro 34: Fixing member

34a: 4th flange 34b: communication hole

34c: outlet 40: stirrer

The present invention relates to a variable filter filtration device, and more particularly, to filter raw water by gradually compressing the fiber yarn as a filtration using the fiber yarn as a filter medium, and decompressing the fiber yarn after operation for a predetermined time, and backwashing the same. It relates to a variable filter filtration device to perform this repeatedly.

Float contained in fluid (especially water) for filtration of suspended solids in water treatment of water purification plant, pretreatment before advanced treatment of various wastewater and wastewater (ie activated carbon, ozone, photocatalyst, membrane separation treatment) or water treatment for recycling purposes. As a device for filtering suspended solids, a micro filter is used.

The precision filtration device used for this purpose is manufactured as a structure in which the pore structure of the filter for filtration is fixed to a certain size, so if the pores are blocked by the filtered contaminants after a certain period of time, backwashing is impossible or the backwash recovery rate This was so poor that most microfiltration units had to replace their filters.

The reason why the conventional filtration apparatus is inferior in backwashing efficiency is that the pore structure does not change even during backwashing as in filtration. As a result, the backwashing efficiency is low because the contaminants caught in the pores of the filter are not easily washed.

By improving the problems of the conventional filtration device, by changing the pore structure of the filter layer during filtration and backwashing, it is possible to filter suspended solids contained in the fluid (especially water) with high precision and backwashing using air pressure and fresh water A filtration device having a variable filter layer having excellent backwashing efficiency is disclosed in Korean Patent Publication No. 97-50047.

1 is a view showing a filtration device having a variable filter layer according to the prior art.

As shown in the drawing, a conventional filtration device has a tubular shape and is connected to a raw water inlet pipe 7 at an upper side thereof, and a lower plate flange 4 of a container 3 connected to a treated water discharge pipe 8 through which raw water filtered out is discharged. By fixing the lower end of the weft filter (1,2) consisting of a plurality of flexible wefts inside, when the filtration of the raw water, the plurality of wefts are compressed to the lower plate flange (4) in accordance with the pressure of the raw water to form a suspended solids The filter layer for filtration is formed, and the backwashing of the plurality of weft filters (1, 2) for forming the filter layer by applying pressurized air and fresh water through the treated water discharge pipe (8) in the state that the compression to the filter layer is released. It releases the crimp and simultaneously performs the backwashing of the collected solids, so that the filtration and the backwashing efficiency are both high.

For reference, in FIG. 1, reference numeral 5 denotes a water flow stabilizer plate, 6 an upper plate flange, 10 an upper holder, 11 an lower holder, 12 an outlet hole, 13 a hollow part, 14 a collecting plate, 15 an hole, and 16 Point to each holder support plate.

However, in the conventional filtration device as described above, since the hydraulic power is applied to the entire area of the holder support plate 16 during compression and decompression of the weft filter 1, 2, the capacity of a pump or the like for generating hydraulic power must be increased. There is a problem.

In addition, the conventional filtration device as described above has a problem that the weft yarn is formed only on the circumferential surface of the weft filter is reduced the filling rate and washing rate.

That is, when the weft filter (1) (2) is compressed, the voids are large and the microflux cannot be removed. When the weft filter (1) (2) is decompressed, the container (3) and the weft filter (1) ( 2) The cleaning rate is reduced due to contaminants in between.

In addition, the upper and lower surfaces of the weft filter (1) (2) consists of a planar porous plate, there is a problem that the effective filtration area is small.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a variable filter filtration device for forming a compression unit that can concentrate pressure in the center of the filtration device so as to compress the fiber yarn by water pressure. Is in.

Another object of the present invention is to provide a variable filter filtration apparatus for weaving the weft of the fiber yarn in the form of a plate and then wound it in a roll form in order to improve the filling rate and washing rate of the fiber yarn, and to shorten the washing time.

Still another object of the present invention is to provide a variable filter filtration apparatus for installing a top and a bottom network in which acid and valleys are continuously formed coaxially about a center on the top and bottom of the fiber yarn to expand the effective area of filtration.

Another object of the present invention is not only to effectively utilize the filter layer of the fiber yarn, but also to form at least two filter layers of the fiber yarn in order to avoid the need for high pressure during the flow of raw water, the thickness of the fiber yarn is made to be different from each other A filter filtration device is provided.

The present invention for achieving this object is elongated in the longitudinal direction, the raw water is formed in the lower portion and the raw water outlet is formed in the upper portion of the filtering device body through which the raw water passes, and installed between the raw water inlet and raw water outlet And a variable filter part consisting of a fiber yarn consisting of a plurality of weft yarns, an upper net fixed to an upper side of the fiber yarn, and a lower net installed to be variable at a lower side of the fiber yarn, and a lower side of the variable filter part. It is installed to include a compression unit for compressing the variable filter by the raw water flowing into the raw water inlet.

In addition, the compression unit, a space portion into which the raw water flows into the inner portion is raised by the raw water, a through hole through which the raw water passes is formed on the outer peripheral surface, the first compression member having a first flange formed on the outer peripheral surface, and the first A cylindrical member coupled to the inside of the compression member to open and close the through hole, and an opening and closing line connected to the filtration apparatus main body 10 through an upper portion of the first compression member at an upper side of the cylindrical member, The switch member 32 which opens the passage hole 31a by the rising and the coaxially installed on the outer side of the first compression member, and the second and third flanges are formed in the upper and lower parts so as to interlock and rise upward. The second compression member and the coaxially installed on the outer side of the second compression member, the lower portion is fixed to the main body of the filtering device, the upper portion so as to be caught when the third flange of the second compression member is raised Is composed of the holding member, the fourth flange is formed.

In addition, an agitator is further installed inside the first compression member.

In addition, the compression unit is formed with a space portion into which the raw water flows into the inner portion is raised by the raw water, the first compression member is formed on the outer peripheral surface is formed with a through hole, the first flange on the outer peripheral surface, and the first The second and third flanges are formed in the upper and lower parts so as to be coaxially installed on the outer side of the one compression member and interlocked to rise upward, and a flow path having an inlet and an outlet through which the raw water flowing from the through hole flows is formed, and at least one The second compression member and the coaxially installed on the outer side of the second compression member, the lower portion is fixed to the filtering device body, the fourth flange on the upper portion so that the third flange of the second compression member is caught up Is formed, the communication hole is formed in communication with the raw water discharged from the outlet of the second compression member, the discharge port is formed in which the raw water introduced from the communication hole is discharged It is composed of government goods.

In addition, an agitator is further installed inside the fixing member.

In addition, the cross sections of the first and second compression members and the fixing member have a rectangular cross section, and the space of the first compression member is closed so that raw water flows into the space.

In addition, the fiber yarn is weaving the weft in the form of a plate and wound it in the form of a roll.

In addition, the fiber yarn to form at least two filter layers, the thickness of the fiber yarn of the filter layer is different from each other.

In addition, the upper and lower networks are to be formed continuously in the center and the valley coaxially around the center.

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

2 to 7 is a view showing the overall structure of a first embodiment of a variable filter filtration device according to the present invention.

As shown, the variable filter filtration device of the present invention is largely composed of a filtration device main body 10, a variable filter part 20, and a compression part 30.

The filtration device main body 10 extends in the longitudinal direction, and the raw water inlet 11 is formed at the bottom, and the raw water outlet 12 is formed at the upper portion so that the raw water passes through.

In addition, a coagulant inlet 13 is formed in the lower part of the filter main body 10 so that the raw water and the coagulant are mixed to improve the water purification ability.

The variable filter unit 20 is provided between the raw water inlet 11 and the raw water outlet 12, the upper part is fixed to the upper side of the fiber yarn 21, a plurality of weft yarn 21, the fiber yarn 21 It consists of a net 22 and the lower net 23 is installed so that the position can be changed in the lower side of the fiber yarn (21).

In addition, the fiber yarn (21) can weave the weft yarn in the form of a plate and then roll it in the form of rolls to extend the longitudinal direction and the cross-sectional area arbitrarily as needed to produce a large filtration device as well as to the entire cross-sectional area. Since the soluble weft is disposed, it is possible to improve the filling rate of the fiber yarn 21, the water flow is applied to the entire cross-sectional area by the washing water in the state in which the fiber yarn 21 is decompressed to be collected inside the fiber yarn 21 It can improve the cleaning rate of contaminants.

In addition, it is preferable that the upper and lower networks 22 and 23 have a mountain and a valley continuously formed coaxially about the center in order to extend the effective cross-sectional area.

In addition, the upper and lower networks 22, 23 is preferably provided below the frame to maintain the shape.

The compression unit 30 is installed under the variable filter unit 20 to compress the variable filter unit 20 by the raw water flowing into the raw water inlet 11, and the first compression member 31. And a switch member 32, a second compression member 33, and a fixing member 34.

The first compression member 31 has a space portion into which the raw water flows into and is lifted by the raw water, and a through hole 31a through which the raw water passes is formed on the outer circumferential surface, and the first flange 31b is formed on the outer circumferential surface. Formed.

In addition, the stirrer 40 is further installed inside the first compression member 31 to rotate the raw water and the coagulant to reliably induce chemical reaction of foreign substances, thereby making it easier to treat the wastewater.

The switch member 32 is coupled to the inside of the first compression member 31 and the cylindrical member 32a for opening and closing the through hole 31a and the first compression member 31 above the cylindrical member 32a. The opening and closing line (32b) is connected to the filtration device main body 10 through the upper portion of the opening, the opening (31a) by the rise of the first compression member (31).

The second compression member 33 is coaxially installed on the outer side of the first compression member 31, and the second and third flanges are formed on the upper and lower parts so as to interlock and ascend upward.

The fixing member 34 is installed coaxially to the outside of the second compression member 33, the lower portion is fixed to the filter main body 10, the third flange 33b of the second compression portion is caught when raised The fourth flange 34a is formed on the upper portion thereof.

In addition, a buffer material of rubber material is fixed to the first, second and third flanges 31b, 33a and 33b to play a buffer role when the first and second compression members 31 and 33 are raised and lowered.

Meanwhile, reference numeral 14 denotes a washing water inlet, 15 an air inlet, and 16 a washing water outlet.

Referring to the filtration and backwashing process of the variable filter filtration device of the present invention configured as described above are as follows.

First, referring to the filtration process, raw water and coagulant (hereinafter referred to as treated water) are introduced into the compression unit 30 from the lower part of the filtration apparatus main body 10, and the treated water introduced into the compression unit 30 is first compressed. The first compression member 31 is raised upward while being rotated by the stirrer 40 installed inside the member 31 to form a fine floc.

When the first compression member 31 is raised, the second flange 33a formed at the upper outer side of the second compression member 33 on the first flange 31b formed on the outside of the first compression member 31. The second compression member 33 is also raised while being caught, and the second compression member 33 is made of at least one or more so as to be arranged according to a user's request.

A fixing member 34 is installed at the outermost side of the second compression member 33 on the coaxial side, and a third flange 33b formed at a lower outer side of the second compression member 33 is formed of the fixing member 34. It is caught by the fourth flange 34a.

When the second compression member 33 is caught by the fixing member 34, the cylindrical member 32a installed in the space portion of the first compression member 31 is lifted upward by the opening / closing string 32b and the first compression is performed. The through hole 31a of the member 31 is opened, and at this time, the treated water is discharged to the inner space of the filtration apparatus 10 and passes through the compressed variable filter unit 20 on the upper side to filter contaminants of the treated water. After being discharged to the raw water outlet (12).

In the above, the length of the opening and closing string 32b is the length when the first compression member 31 is raised to the maximum in the filter main body 10, and the passage hole 31a of the first compression member 31 is opened. Will be.

For reference, the treated water is formed by a fine floc while being rotated by the stirrer 40 installed inside the first compression member 31, so that the upper and lower networks 22 and 23 of the variable filter unit 20 are disposed. Filtration is performed while passing through the compressed fiber yarn 21.

Next, when looking at the backwashing process, the fiber yarn 21 used in the filtration process after being compressed for a long time has collected various contaminants to be washed, and raw water does not flow into the compression unit of the present invention. The part is lowered by its own weight, and at this time, the compressed fiber yarn 21 is also compressed downward while being lowered.

At this time, the washing water and the air are introduced through the washing water inlet and the air inlet installed at the lower portion of the filtration device main body 10 to pass through the fiber yarn 21 to desorb the collected contaminants and discharge them to the washing water outlet.

8 is a view showing another embodiment of the fiber yarn according to the present invention.

The fiber yarn 21 of the present invention may form a single filter layer as shown in FIGS. 4 and 5, and at least two filter layers F may be formed as shown in the drawing. The thickness of the fiber yarn may be formed different from each other.

In one embodiment of the present invention, the fiber yarn 21 having three filter layers F is shown as an example, and the filter layer F has a thinner thickness of the fiber yarn in the advancing direction of raw water. See enlarged part)

As described above, when the thickness of the fiber yarn 21 becomes thinner in the advancing direction of the raw water, when the fiber yarn 21 is compressed, particles of the coarse particles are filtered from the fibrous yarn 21 to the inflow of the raw water, thereby filtering the filter layer ( By making the maximum utilization of F), it is possible to extend the filtration time of the fiber yarn (21).

In addition, the thickness of the fiber yarn 21 may be made thicker toward the advancing direction of the raw water, in this case, since most foreign matter is filtered in the filter layer (F) of the small thickness of the fiber yarn 21, when the raw water flows due to the small obstruction section No high pressure is required.

On the other hand, if the thickness of the fiber yarn 21 is made constant, when the fiber yarn 21 is compressed, the voids of the fiber yarn 21 are constant to form a blockage section for the entire portion, so that the high pressure during the flow of raw water This will be necessary.

9 to 11 are cross-sectional views showing the overall structure of a second embodiment of a variable filter filtration device according to the present invention.

As shown, since the second embodiment of the present invention differs from the first embodiment, the description of overlapping portions is omitted.

The compression part 30 of 2nd Example is comprised largely by the 1st compression member 31, the 2nd compression member 33, and the fixing member 34. As shown in FIG.

 The first compression member 31 has a space portion into which the raw water flows into and is lifted by the raw water, and a through hole 31a through which the raw water passes is formed on the outer circumferential surface, and the first flange 31b is formed on the outer circumferential surface. Formed.

The second compression member 33 is coaxially installed on the outer side of the first compression member 31, and the second and third flanges 33a and 33b are formed on the upper and lower parts so as to be linked upward and upward. A flow path formed with an inlet 33c and an outlet 33d through which raw water flowing in from 31a flows is formed, and is formed of at least one.

The fixing member 34 is coaxially installed on the outer side of the second compression member 33, and the lower portion thereof is fixed to the filter main body 10 and the third flange 33b of the second compression member 33. The fourth flange 34a is formed at an upper portion thereof so as to be caught when rising, and a communication hole 34b communicating with the raw water discharged from the outlet 33d of the second compression member 33 is formed, and the communication hole ( A discharge port 34c through which raw water introduced from 34b) is discharged is formed.

In addition, the stirrer 40 is further installed inside the fixing member 34 to rotate the raw water and the coagulant to reliably induce chemical reaction of foreign substances, thereby making it possible to easily treat the wastewater.

Referring to the filtration and washing process of the variable filter filtration device of the second embodiment of the present invention configured as described above are as follows.

First, referring to the filtration process, when the treated water flows into the compression part from the lower part of the filtration apparatus main body 10 and the first compression member 31 rises, the first flange 31b formed on the outside of the first compression member 31. The second compression member 33 is also raised while the second flange (33a) formed on the upper outer side of the second compression member 33), the second compression member 33 is made of at least one user Will be placed according to the needs of

At this time, as the through hole 31a of the first compression member 31 and the inlet 33c of the second compression member 33 are integrated, the treated water flows into the flow path of the second compression member 33 and again flows out of the outlet 33d. The discharged water is discharged to and the treated water flows when it coincides with the inlet 33c of the second compression member 33.

In addition, when a negative pressure is generated inside the first compression member 31 and the pressure decreases, the through hole 31a of the first compression member 31 and the inlet 33c of the second compression member 33 are closed. The raw water does not flow from the first compression member 31 to the second compression member 33. At this time, if the pressure is increased by the supply of raw water flowing from the raw water inlet 11, the first compression member 31 The through hole 31a and the inlet 33c of the second compression member 33 are integrated so that the treated water flows.

As described above, the fluid flowing in the flow path of the second compression member 33 is discharged to the outlet 34c through the communication hole 34b of the fixing member 34 installed at the outermost side of the second compression member 33. In this case, the raw water and the flocculant are mixed with each other in the stirrer 40 formed in the outlet to discharge while forming a fine floc.

The treated water discharged from the stirrer 40 is filtered while passing through the variable filter unit 20 and finally discharged to the raw water outlet 12.

On the other hand, in the backwashing process, as in the first embodiment, when the compression unit 30 descends, the fiber yarn 21 and the lower net 23 descend by their own weight so that the fiber yarn 21 extends in the longitudinal direction. In a state in which the washing water and the air are introduced through the washing water inlet 14 and the air inlet 15, the contaminants collected while passing through the fiber yarn 21 are detached and discharged to the washing water outlet 16.

12 to 14 are views showing the overall structure of a third embodiment of a variable filter filtration device according to the present invention.

As shown, the third embodiment of the variable filter filtration apparatus according to the present invention has the same basic structure as that of the second embodiment, except that the first and second compression members 31 and 33 and the fixing member 34 are disposed. The cross section is made of a rectangular cross section, the space portion (E) of the first compression member 31 is to close the lower portion so that the raw water flows into the space (E).

As described above, the cross sections of the first and second compression members 31 and 33 and the fixing member 34 form a rectangular section so that the manufacturing cost and the like can be reduced when manufacturing a large filtration device. Depending on the size of the compression unit 30 may be formed in plurality.

In addition, the raw water discharged to the outlet 34c through the communication hole 34b of the fixing member 34 is mixed with the raw water and the flocculant in the stirrer 40, unlike the second embodiment, the compression unit 30 It is discharged to the inner and outer side (I) (O) of the.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, it will be understood that various modifications and other embodiments are possible to those skilled in the art.

By forming the compression unit 30 that can concentrate the pressure in the center of the filtration device of the present invention as described in detail above, it is possible to improve the purification ability of the raw water passing through the compressed fiber yarn with a small water pressure have.

In addition, the filtration device of the present invention is formed by winding the weft of the fiber yarn in the form of a plate and then wound it in the form of a roll, so that compression and release is simply made, the filling rate and washing rate of the fiber yarn is improved, the washing time when washing This can shorten the filtration efficiency is improved.

In addition, the filtration device of the present invention is to install the upper and lower networks formed with acid and valley continuously coaxially around the center at the top, bottom of the fiber yarn, it is possible to improve the filtration efficiency by expanding the effective area of filtration.

In addition, the filtration apparatus of the present invention is formed at least two filter layers of the fiber yarn, so that the thickness of the fiber yarn is made to be different from each other to effectively utilize the filtration layer and does not require high pressure during the flow of raw water.

Claims (9)

Longitudinally extending in the longitudinal direction, the raw water is formed at the bottom and the raw water outlet 12 is formed in the upper portion of the filtration device body 10 through which the raw water passes, and Fiber yarn 21 made of a plurality of weft yarns provided between the raw water inlet 11 and the raw water outlet 12, the upper net 22 is fixedly installed on the upper side of the fiber yarn 21 and the fiber yarn 21 Variable filter unit 20 consisting of a lower net 23 is installed so that the position is variable in the lower side, Variable filter filtration device which is installed under the variable filter unit 20 and comprises a compression unit 30 for compressing the variable filter unit 20 by the raw water flowing into the raw water inlet (11). . The method of claim 1, The compression unit 30, The first compression member 31 is formed with a space portion through which raw water flows and rises by raw water, and a through hole 31a through which raw water passes, and a first flange 31b formed on the outer circumferential surface thereof. , The filtering device is coupled to the inner side of the first compression member 31 through the cylindrical member 32a for opening and closing the through hole 31a and the upper portion of the first compression member 31 above the cylindrical member 32a. A switch member 32 formed of an opening and closing line 32b connected to the main body 10 and opening the passage hole 31a by the rising of the first compression member 31; The second and third flanges 33a and 33b are formed on the upper and lower portions so as to be coaxially installed on the outer side of the first compression member 31 and to be interlocked and lifted upward, and the second compression member 33 is formed of at least one. Wow, Coaxially installed on the outer side of the second compression member 33, the lower portion is fixed to the filter body 10, the upper portion so that the third flange (33b) of the second compression member 33 is caught when raised Variable filter filtration device, characterized in that consisting of the fixing member 34 is formed with a fourth flange (34a). The method of claim 2, Variable filter filtration device, characterized in that the stirrer 40 is further provided inside the first compression member (31). The method of claim 1, The compression unit 30, The first compression member 31 is formed with a space portion through which raw water flows and rises by raw water, and a through hole 31a through which raw water passes, and a first flange 31b formed on the outer circumferential surface thereof. , Coaxially installed on the outer side of the first compression member 31 and the second and third flanges 33a and 33b are formed on the upper and lower portions so as to be linked upward and upward, and the raw water flowing from the through hole 31a flows. A flow path 33e having an inlet 33c and an outlet 33d formed therein, the second compression member 33 comprising at least one, Coaxially installed on the outer side of the second compression member 33, the lower portion is fixed to the filter body 10, the upper portion so that the third flange (33b) of the second compression member 33 is caught when raised A fourth flange 34a is formed, and a communication hole 34b communicating with the raw water discharged from the outlet 33d of the second compression member 33 is formed, and the raw water introduced from the communication hole 34b is formed. Variable filter filtration device, characterized in that consisting of a fixing member 34 is formed discharge outlet 34c. The method of claim 4, wherein A variable filter filtration device, characterized in that the stirrer 40 is further provided inside the fixing member (34). The method of claim 4, wherein Cross sections of the first and second compression members 31 and 33 and the fixing member 34 have a rectangular cross section, and the space portion E of the first compression member 31 is closed with a space portion ( E) Variable filter filtration device characterized in that the raw water to be introduced into. The method of claim 1, The fiber yarn 21 is a variable filter filtration device, characterized in that weaving the weft in the form of a plate and wound it in the form of a roll. The variable filter filtration device according to claim 1, wherein the fiber yarns (21) form at least two filter layers (F), and the thicknesses of the fiber yarns (21) of the filter layers (F) are different from each other. The method of claim 1, The upper and lower networks (22) (23) is a variable filter filtration device, characterized in that to form a mountain and valley continuously coaxially around the center.

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