KR102014105B1 - Tubular Macrofiltration Membrane - Google Patents

Abstract

The present invention relates to a tubular membrane and, more specifically, to a tubular membrane used in a water treatment system for removing particulate matter from sewage/wastewater, and a manufacturing method thereof. The tubular membrane (100) comprises: a cylindrical support (10) including pores (11) on the outer circumferential surface thereof and a hollow portion (12) penetrating the upper and lower surfaces in the longitudinal direction; and a plurality of filling members (20) drawn into the support (10). The outer diameter of the filling member (20) is smaller than the diameter of the hollow portion (12) of the support (10) and larger than the radius of the hollow portion (12) of the support (10). An object of the present invention is to install a plurality of internal members in the hollow portion in the tubular membrane, prevent partial backwash concentration and evenly back-wash the entire section of the tubular membrane.

Description

Tubular Macrofiltration Membrane

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular microfiltration membrane, and more particularly, to a tubular membrane used in a water treatment system for removing particulate matter from top / bottom / wastewater and the like and a method of manufacturing the same.

In general, in the field related to the filter for removing particulate matter from the upper, lower, waste water, etc., the production water is obtained by filtering contaminants in the liquid to be treated using a membrane.

Separation membranes are suitable for separating and removing suspended solids such as colloids and fine particles in waste water as well as general filtration for separating insoluble particles by selectively passing specific components. It refers to a membrane made of a special material that can even separate gas. Such membranes may be classified into microfiltration membranes (MF), ultrafiltration membranes (UF), ultrafiltration membranes (UF), nanofiltration membranes (NF; Nan filtration membranes), reverse osmosis membranes (RO; reverse osmosis membranes), and ion exchange membranes (IE; Ion Exchange), electrodialysis membrane (ED; Electrolyte Dialysis), gas separation membrane (GAS; Gas Separation / PV), and hemodialysis membrane (Hem dialysis).

In addition, separators are spiral-wound, hollow-fiber, tubular, plate & frame, hollow-fiber and monolithic modules, depending on their shape. (Monolith type) and the like. Among them, the tubular membrane has strong durability and chemical resistance, and is used to treat high concentrations of wastewater, which is difficult to treat with other membranes, or to concentrate contaminants or recoverable substances, and various research and developments have been conducted.

For example, Korean Patent No. 1384239 is configured by assembling a plurality of membrane modules including a separator of porous material in a tubular shape and a water intake tube having a plurality of flow holes formed to withdraw treated water from the separator within the separator. It relates to an immersion ceramic separator module assembly characterized in that. In addition, Korean Patent No. 1260742 provides a separation membrane element for filtration that is excellent in filtration performance, excellent in chemical resistance and mechanical strength, and can obtain a stable permeate flow rate over a long period of time. Korean Patent No. 515806 relates to a filtration apparatus, in particular an immersion membrane filtration apparatus for obtaining a filtrate by filtering a to-be-treated liquid in a state of being immersed in the to-be-treated liquid. Japanese Patent No. 5407133 relates to a membrane module for filtration in which a membrane element for filtration and a plurality of membrane elements are focused, and is used in a filtration apparatus for solid-liquid separation treatment in the field of environmental conservation, pharmaceutical food, and the like.

In the prior art, since several tubular membranes are connected and operated in series, the contamination tendency such as the pollution degree and pollution timing of the tubular membrane differs from the inflow of raw water to the outflow of the concentrated effluent and the production water. It is difficult to manage the whole system stably because it is not easy to manage. In particular, the macro filter has a large pore size, so that the surface of the tubular membrane is easy to be clogged by the impurities.

In general, when the backwashing process is carried out using air while the water is filled inside the tubular membrane, the backwashing effect tends to be concentrated mainly on the upper part due to the nature of the air rising upward, thus providing a uniform washing effect of the entire tubular membrane module. There is a problem that is difficult to achieve.

Korean Patent Registration No. 1384239 Korean Patent No. 1260742 Korean Patent Registration No. 515806 Japanese Patent No. 5407133

An object of the present invention is to provide a plurality of internal members in the hollow portion of the tubular membrane, thereby preventing partial backwash concentration and even backwashing the entire section of the tubular membrane.

The tubular membrane 100 according to the present invention includes a cylindrical support 10 including a hollow portion 12 having pores 11 formed on an outer circumferential surface thereof and having an upper and lower surface penetrating therein; And a plurality of filling members 20 drawn into the support 10, wherein an outer diameter of the filling member 20 is smaller than a diameter of the hollow part 12 of the support 10 and the support 10. It is characterized in that the larger than the radius of the hollow portion 12).

In this case, the filling member 20 has a through hole 21 formed therein, through which upper and lower surfaces penetrate each other, a through hole 21 formed therethrough, and the filling member 10 linearly. It characterized in that it comprises a; connecting member (22) for connecting.

The pore 11 is characterized in that from 1 to 10 micrometers.

Here, the size of the inner diameter of the support 10 is 6 to 8mm, the size of the outer diameter is characterized in that 7 to 10mm.

Here, the filling member 20 is characterized in that the circular shape, elliptic shape or regular polyhedral form.

Here, the material of the filling member 20 is characterized by consisting of one or more selected from polyethylene (PE, polyethylene), polypropylene (PP, polypropylene), activated carbon, ion exchange resin, ceramic ball.

Here, the support 10 and the filling member 20 is characterized in that it can be operated in an environment of the input backwash pressure is 3 to 5 kg / cm 3.

Method for producing a tubular membrane according to the present invention includes a cutting step (S10) for cutting a nonwoven fabric sheet containing fibers having a melting point of 110 degrees to 200 degrees; Winding step (S20) of winding the non-woven fabric sheet in plural layers to produce a tubular support having an inner diameter of 6 to 8mm; A heating step (S30) of heating the wound nonwoven fabric sheet to a temperature equal to or higher than a melting point such that the plurality of layers of nonwoven fabric sheets are fused and bonded to a predetermined thickness; An electrospinning solution manufacturing step (S40) of adding a polymer having a polyvinylidene fluoride (PVDF) and a glass transition temperature different from the glass transition temperature of the polyvinyldenfluoride (PVDF) to prepare an electrospinning solution; And an outer coating step (S50) of electrospinning the electrospinning solution to the support to coat the outside of the support.

The nonwoven fabric sheet is characterized in that it contains LM-PET.

Here, the outer coating step (S50) is characterized in that the electrospinning solution is injected into the syringe, it is characterized in that the discharge method at a rate of 5 ~ 15㎛ / min on the support using a syringe pump.

Here, the outer coating step (S50) is characterized in that the radiation voltage: 10 to 25 kV and the radiation distance: 10 to 20 cm conditions.

In the tubular membrane system according to the present invention, two or more tubular membranes 100 are installed, and the hollow part inside the tubular membrane 100 outside the tubular membrane 100 through the pores 11 of the tubular membrane 100 ( Separation membrane module 200 for passing through the to-be-processed liquid filtered to 12); A discharge part 300 including a treated water collecting pipe 310 for collecting the to-be-processed liquid and coupled to an upper end of the separation membrane module 200 to discharge the to-be-processed liquid to be filtered; And a backwashing water collection pipe 410 for collecting backwashing fluid, and a backwashing unit 400 coupled to the bottom of the separation membrane module 200 to supply a backwashing fluid. It includes a vent pipe 320 in the upper direction so as to discharge the backwashing fluid, characterized in that the separation membrane module 200 and the backwashing collecting pipe 410 is connected while maintaining a gap of 8 to 15mm do.

Method for operating a tubular membrane system according to the present invention is a filtration step (S100) to filter the impurities by passing the liquid to be processed in the inward direction from the outer surface of the tubular membrane (S100); A discharge step (S200) of discharging the treated liquid filtered through the hollow part 12 of the tubular membrane 100 to the discharge part 300; A backwashing step of removing contaminants deposited on the surface of the tubular membrane 100 by injecting a fluid at a pressure of 3 to 5 kg / cm 3 toward the hollow portion 12 of the tubular membrane 100 in the backwashing unit 400 ( S300); wherein, the backwashing step is characterized in that the resistance is generated by collision of the fluid with the plurality of filling members 20 introduced into the tubular membrane 100.

The present invention has the effect of providing a plurality of internal members in the hollow portion of the tubular membrane, preventing partial backwashing and even backwashing the entire section of the tubular membrane.

In addition, the macro filter has the effect of enabling the filtration function continuously in the backwashing process to overcome the clogging of the pores due to impurities caused by the large size of the pores.

1 is a perspective view showing a tubular membrane according to the present invention.
2 shows a method for producing a tubular membrane according to the invention.
3 is a cross-sectional view showing a tubular membrane according to the present invention.
4 (a) is a cross-sectional view showing a narrow section of the flow rate of the tubular membrane according to an embodiment of the present invention, Figure 4 (b) is a cross-sectional view showing a section of a wide flow rate of the tubular membrane according to an embodiment of the present invention.
5 is a cross-sectional view showing a tubular membrane according to an embodiment of the present invention.
6 is a perspective view of a tubular membrane system including a tubular membrane according to the present invention.
Figure 7 shows a method of operating a tubular membrane system comprising a tubular membrane according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular microfiltration membrane, and more particularly, to a tubular membrane used in a water treatment system for removing particulate matter from top / bottom / wastewater and the like and a method of manufacturing the same.

With regard to the specific details for carrying out the present invention, the terms or words used in the present specification and claims should not be interpreted as being limited to the ordinary or dictionary meanings, and the inventors should consider their own invention in the best way. For the purpose of explanation, the concept of terms should be interpreted as meanings and concepts consistent with the technical spirit of the present invention based on the principle that the concept of terms can be properly defined. Accordingly, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, these can be replaced at the time of the present application It should be understood that there may be various equivalents and variations in which there are.

1 is a perspective view showing a tubular membrane according to the present invention.

As shown in FIG. 1, the tubular membrane 100 according to the present invention includes a cylindrical support 10 including a hollow portion 12 having pores 11 formed on an outer circumferential surface thereof and having an upper and lower surface penetrating therein; It includes; a plurality of filling member 20 drawn into the support 10.

The support 20 is a tubular material having an inner diameter of 4 to 8 mm in a manner in which a nonwoven fabric containing LM (Low Melting) PET fibers that melt at a lower temperature (100 to 200 ° C.) than the general PET nonwoven fabric is wound to a constant thickness by applying heat without other additives. Prepare in form. Specifically, the size of the inner diameter of the support 10 is 6 to 8mm, the size of the outer diameter is preferably 7 to 10mm. In addition, the support 10 includes a plurality of pores 11 on the outer circumferential surface of the pore 11 is preferably 1 ~ 10㎛.

2 shows a method for producing a tubular membrane according to the invention.

As shown in FIG. 2, the method of manufacturing a tubular membrane according to the present invention includes a cutting step (S10), a winding step (S20), a heating step (S30), an electrospinning solution manufacturing step (S40), and an outer coating step (S50). It includes.

Cutting step (S10) is to cut the non-woven fabric sheet containing a fiber having a melting point of 110 degrees to 200 degrees in a rectangular shape. Specifically, the nonwoven fabric sheet is preferably a composite fiber containing a low melting point (LM) polyester.

Winding step (S20) is made of a tubular support 10 having an inner diameter of 6 to 8mm by winding a plurality of layers of nonwoven fabric sheets on the outer circumferential surface of a pair of cylindrical molds (not shown) facing each other.

In the heating step S30, the wound nonwoven fabric sheet is heated to a temperature equal to or higher than the melting point so that the plurality of layers of nonwoven fabric sheets are fused and bonded to a predetermined thickness. When using a nonwoven fabric containing LM (Low Melting) PET fibers that melt at a lower temperature (100 to 200 ° C.) than ordinary PET nonwoven fabrics, it is possible to wind them to a constant thickness by applying heat without any other additives.

In the electrospinning solution preparation step (S40), a polyvinylidene fluoride (PVDF) and a glass transition temperature are added to a polymer different from the glass transition temperature of the polyvinyl fluoride (PVDF) to prepare an electrospinning solution.

External coating step (S50) is electrospinning the electrospinning solution to the support 10 to coat the outside of the support (10).

Electrospinning injects the solution into the nozzle and applies electrical energy stronger than the surface tension of the solution formed on the nozzle surface to the nozzle to generate nanofibers while evaporating the solvent to induce the collector to be stacked. For this purpose, the electrospinning solution is made of polyvinylidene fluoride (PVDF) with or without hydrophilicity as the main polymer. In the use of a solvent, NMP is used as a main solvent, and a low boiling point solvent is added to prepare an electrospinning solution. Electrospinning the mixed solution onto the support by adding polymers with different glass transition temperatures to the main polymer, compressing it at a specific laminating temperature to increase the fixing force between the nanofiber coating layer and the support, resulting in nanofiber coating in water or air backwashing during module operation It is manufactured so that the desorption phenomenon of the layer does not occur.

After electrospinning the electrospinning solution into a syringe (not shown), the electrospinning solution is preferably discharged at a rate of 5 to 15 μl / min on a support using a pump (not shown).

Electrospinning is preferably carried out under the conditions of a radiation voltage: 10 to 25 kV and a radiation distance: 10 to 20 cm, where the radiation distance means a distance between the support and the nozzle of the syringe.

 If the radiation voltage is less than 10kV, the manufacturing time is excessively increased, which may increase the manufacturing cost, and may cause difficulty in forming a uniform film. On the contrary, when the radiation voltage exceeds 25 kV, it may act as a factor that increases the cost compared to the effect increase, which is not economical. In addition, when the radiation distance is less than 10 cm, there is a fear that the film quality characteristics due to interference by the nozzle. On the contrary, when the spinning distance exceeds 20 cm, it may be difficult to secure a uniform film.

The coating layer is formed on the outer surface of the tubular membrane 100 during the external coating step (S50). In this process, the support layer 10 is heated to a temperature above the melting point of the nonwoven sheet to fix the coating layer to the support 10. The nonwoven sheet may further comprise the step of fusion bonding a certain thickness.

3 is a cross-sectional view showing a tubular membrane according to the present invention.

As shown in FIG. 3, in the tubular membrane 100 according to the present invention, the outer diameter of the filling member 20 is smaller than the diameter of the hollow part 12 of the support 10 and the hollow part 12 of the support 10. It is characterized by being larger than the radius of. The filling member 20 may generate a resistance to the flow of the fluid generated during the backwashing process of the tubular membrane 100 so that the backwashing effect may be evenly applied to the entire tubular membrane 100. If the outer diameter of the filling member 20 is the same as the diameter of the hollow portion 12, the hollow portion 12 may be blocked by one filling member 12, so that the treated water is difficult to move the hollow portion 12 smoothly. When the outer diameter of the filling member 20 is smaller than the radius of the hollow part 12, the hollow part 12 may be blocked by the plurality of filling members 20. The plurality of filling members 20 may be formed in a predetermined shape and arranged in an irregular arrangement inside the tubular membrane 100.

The filling member 20 may have a circular shape, an elliptic shape, or a regular polyhedron shape. In order to control the magnitude of resistance generated during the backwashing process, a protrusion or a groove may be formed on the surface thereof. In addition, the filling member 20 may have a pretzel shape or a concave convex bar shape. In addition, the material of the filling member 20 is composed of one or more selected from polyethylene (PE, polyethylene), polypropylene (PP, polypropylene), activated carbon, ion exchange resin, ceramic balls, considering the economical efficiency of polyethylene (PE, polyethylene) Or it is preferable to use polypropylene (PP, polypropylene).

In the general backwashing process of tubular membrane, when backwashing at high pressure (more than 1㎏ / ㎠), the filled water is momentarily pushed out by the compressed air force and then the air is discharged, and this process can be repeated at regular time intervals. At this time, if there is no resistance against the water or air pushed out, there is a backwashing effect only at the upper part of the tubular membrane.

By filling the plurality of filling members 20 in the hollow portion 12 inside the tubular membrane 100. In the backwashing process, resistance is generated by a collision between the fluid moving inside the tubular membrane 100 and the plurality of filling members 20 introduced into the tubular membrane 100. Due to the resistance generated in this way, the fluid in the backwashing process can be evenly distributed throughout the upper and lower portions of the tubular membrane 100, thus preventing partial backwashing of the tubular membrane 100 in the backwashing process and the entire section of the tubular membrane 100. It has the effect of evenly backwashing.

The effect of the filling member 20 will be described in more detail as follows.

4 (a) is a cross-sectional view showing a narrow section of the flow rate of the tubular membrane according to an embodiment of the present invention, Figure 4 (b) is a cross-sectional view showing a section of a wide flow rate of the tubular membrane according to an embodiment of the present invention.

The terms illustrated in FIGS. 3 and 4 are as follows.

D: inner diameter and diameter of the tubular membrane 100

R: radius of the tubular membrane 100

Amin: The point where the backwashing flow rate is the fastest due to less influence of the resistance by the filling member 20 (the point where the backwashing cross section area is minimum)

Amax: The point where the backwashing flow rate is the slowest (the point where the backwashing cross section area is the maximum) under the influence of the resistance by the filling member 20.

The relationship between the flow rate Q (m 3 / S) of the fluid used in the backwashing process, the cross-sectional area A (m 2) of the hollow portion of the tubular membrane through which the fluid passes, and the flow rate V (m / sec) of the fluid are as follows.

Therefore, the section of Amin should have high resistance value, but the flow rate to be treated should have low resistance value, so the cross-sectional area is minimized to make the flow rate less than 1/2 of the Amax section while maintaining the cross-sectional area of 0.5m / sec or less. . That is, the section of Amax is maintained more than twice the cross-sectional area of the section of Amin to slow the flow rate of the fluid to lower the resistance value generated in the backwashing process. In the Amin section, the instantaneous flow rate of the fluid is high, but the instantaneous flow rate of the Amax section is repeated so that the resistance value of each part is different so that the backwash flow can be seen with even backwash flow. At this time, the larger the difference between the cross-sectional area of the maximum (Amax) section and the minimum (Amin) section of the hollow portion 12 of the tubular membrane 100, the greater the difference in the resistance value due to the flow rate, the better the backwashing effect. It is preferable that the cross-sectional area of the Amax section is at least two times larger than the cross-sectional area of the Amin section.

5 is a cross-sectional view showing a tubular membrane according to an embodiment of the present invention.

As shown in FIG. 5, the filling member 20 of the tubular membrane 100 according to the present invention has a through hole 21 formed therein, through which upper and lower surfaces penetrate each other, and penetrate the through hole 21. And a connection member 22 for linearly connecting the plurality of charging members 20.

The resistance of the fluid and the filling member 20 may be adjusted by changing the size of the through hole 21 formed in the filling member 20. The connection member 20 may be manufactured in various forms that may affect the flow of the fluid. In the case of connecting each filling member 20 using the spiral connecting member 22, vortices are generated in the process of generating a resistance due to the fluid collides with the filling member 20, and the vortices generated in this way are The flow can be evenly distributed over the entire upper and lower portions of the tubular membrane 100 to prevent partial backwashing and to backwash the entire section of the tubular membrane 100 evenly.

The tubular membrane 100 including the support 10 and the filling member 20 having such a characteristic can be operated even in a high pressure environment having a backwash pressure of 1 kg / cm 3 or more, and particularly, a backwash pressure of 3 to 5 kg / cm 3 Driving in the environment is possible.

6 is a perspective view of a tubular membrane system including a tubular membrane according to the present invention.

As shown in FIG. 6, the tubular membrane system includes two or more tubular membranes 100, and the hollow portion 12 of the tubular membrane 100 outside the tubular membrane 100 through the pores of the tubular membrane 100. Separation membrane module 200 for passing through the liquid to be filtered to be discharged; A discharge part 300 coupled to an upper end of the separation membrane module 200 for discharging the filtered target liquid; And a backwashing unit 400 coupled to the bottom of the membrane module 200 to supply a backwashing fluid.

Separation membrane module 200 is to pass the treatment liquid in the inward direction from the outer surface of the tubular membrane 100 to filter the impurities, and discharge the filtered treated water through the hollow portion 12 of the tubular membrane (100).

The discharge unit 300 includes a treated water collecting pipe 310 for collecting the liquid to be treated, and discharges the liquid to be filtered by being coupled to the top of the separation membrane module 200. The vent pipe 320 is installed at an upper end of the discharge part 300 in an upward direction to discharge the backwashing fluid.

The backwashing unit 400 includes a backwashing water collecting pipe 410 for collecting backwashing fluid and is coupled to the bottom of the separation membrane module 200 to supply the backwashing fluid into the tubular membrane 100. The backwashing water collection pipe 410 is interconnected to supply the backwashing fluid to the separation membrane module 200. At this time, the interval between the separation membrane module 200 and the backwashing water collection pipe 410 maintains an interval of 8 to 15 mm. Configure the backwash fluid flow smoothly.

The tubular membrane system may be used in the liquid to be immersed and pressurized, and the immersion type may be generally composed of a rectangular module, but the pressurized type may be formed in a circular shape rather than a rectangular module.

The back detail and the discharge part of the tubular membrane system including the tubular membrane according to another embodiment of the present invention may be variously arranged up and down of the membrane module. The back tax part may be coupled to the upper part and the discharge part may be coupled to the lower part based on the membrane module, and the discharge part may be coupled to both the upper part and the lower part, or the back tax part may be combined to both the upper part and the lower part.

Figure 7 shows a method of operating a tubular membrane system comprising a tubular membrane according to the present invention.

As shown in FIG. 7, the operation method of the tubular membrane system includes a filtration step S100, a discharge step S200, and a backwashing step S300.

In the filtration step (S100), the to-be-processed liquid passes inward from the outer surface of the tubular membrane 100 to filter impurities.

In the discharging step S200, the processing liquid filtered through the hollow part 12 of the tubular membrane 100 is pumped through the suction or pressurizing means and discharged to the discharge part 300. Thereafter, the backwashing period during the operation is checked. The backwashing period may be determined by a constant flow rate driving criterion or a constant pressure driving criterion.

The backwashing step (S300) removes contaminants deposited on the surface of the tubular membrane 100 by injecting a fluid at a pressure of 3 to 5 kg / cm 3 toward the hollow portion 12 of the tubular membrane 100. As the fluid is leaked from the inside of the tubular membrane 100 to the outside, contaminants trapped on the membrane surface and the membrane pores fall. In this process, the fluid collides with the plurality of filling members 20 introduced into the tubular membrane 100 to generate resistance. Due to the resistance generated in this way, the fluid can be evenly dispersed in the backwashing process, thereby preventing partial backwashing and backwashing the entire section of the tubular membrane 100 evenly.

In addition, when cleaning the membrane in the backwashing step (S300) may further include the step of introducing the cleaning chemicals to the backwashing collecting unit using a backwash pump, thereby reducing the cleaning time. The backwashing fluid transferred to the upper part in the backwashing step (S300) is discharged by being connected to the vent pipe 320 at the top of the discharge part 300, and then again filtered step (S100) and discharge step (S200) and backwashing step (S300). The process is repeated in order of).

According to the present invention as described above, the membrane module for purifying the liquid to be treated may be configured as a tubular membrane, so that the hollow portion of the tubular membrane from which the liquid to be treated is discharged may be used as a backwash flow path in which a pressure fluid made of air or water is ejected in a reverse direction. As a result, it is possible to easily remove contaminants deposited on the surface of the tubular membrane as well as fine particles of impurities contained in the micropores of the tubular membrane.

In addition, the macro filter has the effect of enabling the filtration function continuously in the backwashing process to overcome the clogging of the pores due to impurities caused by the large size of the pores.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains various modifications and variations without departing from the essential characteristics of the present invention. The scope of protection should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: support
11: pore 12: hollow part
20: Filling member
21: through hole 22: connecting member
100: tubular membrane
200: membrane module
300: discharge portion 310: treated water collection pipe
320: vent piping
400: backwash 410: backwash collection

Claims (13)

A cylindrical support 10 including a hollow portion 12 formed on the outer circumferential surface thereof with pores 11 having a diameter of 1 to 10 micrometers and having an upper and lower surface penetrated therein;
And a plurality of filling members 20 drawn into the support 10.
The outer diameter of the filling member 20 is smaller than the diameter of the hollow portion 12 of the support 10 and larger than the radius of the hollow portion 12 of the support 10
The filling member 20 has a circular shape, an elliptic shape or a regular polyhedron shape, and is composed of one or more materials selected from polyethylene (PE, polyethylene), polypropylene (PP, polypropylene), activated carbon, ion exchange resin, and ceramic balls. Tubular membrane (100)
The method according to claim 1,
The filling member 20 has a through hole 21 through which the upper and lower surfaces penetrate each other in the central region,
And a connecting member 22 formed to penetrate the through-hole 21 and linearly connecting the plurality of filling members 10 to the tubular membrane 100.
delete The method according to claim 1,
The inner diameter of the support 10 is 6 to 8mm, the outer diameter of the tubular membrane 100, characterized in that 7 to 10mm.
delete delete The method according to claim 1,
The support 10 and the filling member 20 may be operated in an environment in which the backwash pressure is 3 to 5 kg / cm 3.
delete delete delete delete At least two tubular membranes 100 according to any one of claims 1, 2, 4, and 7 are installed, and the tubular membrane 100 outside the tubular membrane 100 through the pores 11 of the tubular membrane 100. Separation membrane module 200 for discharging by passing through the liquid to be filtered to the inner hollow portion 12;
A discharge part 300 including a treated water collecting pipe 310 for collecting the to-be-processed liquid and coupled to an upper end of the separation membrane module 200 to discharge the to-be-processed liquid to be filtered;
And a backwashing water collection pipe 410 for collecting backwashing fluid, and a backwashing unit 400 coupled to the bottom of the separator module 200 to supply a backwashing fluid.
The discharge unit 300 includes a vent pipe 320 in the upper direction to discharge the backwashing fluid at the top end
Tubular membrane system, characterized in that the separation membrane module 200 and the backwashing water collecting pipe 410 is maintained at a distance of 8 to 15 mm
A filtration step (S100) in which impurities are filtered by passing the liquid to be treated inward from the outer surface of the tubular membrane 100 according to any one of claims 1, 2, 4, and 7;
A discharge step (S200) of discharging the to-be-processed liquid filtered through the hollow part 12 of the tubular membrane 100 to the discharge part 300;
A backwashing step of removing contaminants deposited on the surface of the tubular membrane 100 by injecting a fluid at a pressure of 3 to 5 kg / cm2 toward the hollow portion 12 of the tubular membrane 100 in the backwashing unit 400 ( S300)
The backwashing step is a method of operating a tubular membrane system, characterized in that the resistance is generated by the fluid collides with the plurality of filling member 20 introduced into the tubular membrane (100).

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