KR100354836B1 - Apparatus for filtering suspended solid in water - Google Patents

Abstract

The present invention not only effectively filters and separates suspended solids such as organic and inorganic particulate matter and algae in water, but also extends the duration of the filtration by allowing the suspended solids trapped on the surface of the filtration layer to be continuously concentrated and discharged. The present invention relates to a submerged suspended solids filtration device that can easily detach the suspended solids trapped in the air or backwash water.

The present invention for this purpose is installed in a predetermined pipe member, the filter means of the fiber material for capturing and filtering the suspended solids contained in the feed water supplied to the pipe member; A flange means for fixing one end of the filter means and having a plurality of distribution holes formed with a plurality of distribution holes for dispensing backwash material such as air or backwash water for back washing the filter means; Capture particle outflow prevention means installed in response to an inflow state of the feed water filtered by the filter means and the density of the filter means and the trapped particle state of the suspended suspended solids; Raw water supply means and backwash material supply means for supplying the supply source water and the backwash material to the filter means, respectively; And filtered water discharge means, suspended material discharge means, and backwash water discharge means for discharging the filtered water filtered by the filter means, the suspended solids captured by the filter means, and the backwash water, respectively. .

Description

Apparatus for filtering suspended solid in water}

The present invention relates to an apparatus for filtering suspended solids in water for filtering, separating and removing suspended solids (suspended solids, or suspended solids), such as particulates and algae, which are contained in the water. The present invention relates to an apparatus for filtration of suspended solids in water, in which separation, removal, as well as suspended solids trapped in the filtration layer are continuously concentrated and discharged simultaneously with filtration.

On the other hand, the present invention by using a variety of types of filter media with flexibility and elasticity to control the porosity and pore size of the filter bed by the type of the filter medium and the packing density and inlet water pressure to free the filtration efficiency, filtration rate and the amount of filtration The present invention relates to an apparatus for filtering suspended solids in water to be controlled by materials.

In general, the operation of the filtration apparatus consists of filtration and back washing. The filtration process involves diffusion and straining in the filtration layer (hereinafter referred to as 'filter') filled with suspended solids such as particulates and algae in the water (hereinafter referred to as 'filter'). And complex physicochemical unit operations, such as interception, imperfection, sedimentation, flocculation and adsorption, are captured and removed by a complex mechanism of interaction. It is a unit process that is discharged.

During the continuous filtration process, the accumulation of underwater particles in the filtrate filled with the filter media reduces the pores of the filter media and increases the head loss due to the filtration resistance, thus requiring the backwash process of the media in the filter media. do. Therefore, the performance of the filtration system is evaluated by the efficiency of removing the suspended solids, the size of the removed particle, the filtration rate, the filtration duration, the backwash frequency, the backwash quantity, the backwash time, and the like.

The media used in the filtration process include sand, anthracite, activated carbon, clay, crushed magnetite, garnet, inert media, etc. Particulate matter is mainly used. Such media have the advantage of being easy to purchase and easy to install, but the disadvantage is that the filtration device and the installation area are very large. In addition, the trapping space of the underwater particles during filtration is not only limited to the surface layer, but also has a fixed pore structure due to the characteristics of the media, so that the pore reduction or clogging of the floating layer due to the suspended solids in the water frequently occurs, and the filtration resistance The pressure loss (head loss) increases due to the flow channeling, break-through, and so on, the backwashing frequency and backwashing quantity of the media in the filter bed increases, and the filling Due to the large filtration pressure due to the filtered media, the filtration rate is small, and there is a problem such that the media is leaked during backwashing.

The improved rotary backwash precision filtration device (Application No .: 1997-023068) is a weft yarn radially attached to the side of the porous drum rotating body in order to solve the problems caused by the filtration method as described above. One end of the filter cloth is attached to a rotating spring fixed to the pressure vessel wall to form a filter layer by the rotation of the drum and the tension of the spring, and to filter the back of the drum by repeating the reverse and forward rotation of the drum. However, in the filtration device, not only are the fiber yarns damaged by friction, it is difficult to form a uniform filtrate, and the particle capture space is small, so that the filtration duration is short, the frequency of backwashing is frequent, and it is not easy to cope with the fluctuation of water quality of the influent, The disadvantage is that it is difficult to manage.

Then, a permanent filtration device having a variable filter layer which is a filtration device which is compressed and filtered by the weft filter cloth by the supply pressure of raw water, and is relaxed by back pressure by the back pressure of the pressurized air (application number: special 1998- 0405542) has been developed, but this method also has a high entanglement and damage of fibrous fiber, which is a medium in the process of repeated compression and relaxation of the piston. This short, frequent backwashing frequency, low filtration rate, difficult to cope with the change in the water quality of the source water, and has a relatively large backwash quantity.

Therefore, in order to solve the above problems, there is an apparatus for separating suspended solids in a solution using a flexible fiber yarn developed and applied by the present inventors, and a method thereof (application number: Sec. 1999-013396), which is the length of the fiber yarn used as a medium. It is possible to arbitrarily control the depth of the filter bed and the particle capture space, and to control the porosity, the pore size, the particle capture amount and the quality of the filtered water according to the density of the flexible fiber yarn, and it is easy to cope with the water quality change of the source water. However, there are disadvantages such as difficulty in mechanization in the integration method of the fiber yarn with flexibility and elasticity.

The present invention has been created to solve the problems shown in the conventional filtration device as described above, having a large particle capture space greatly improves the durability of the fibrous fiber as a medium, and the compactness of the facility, as well as easy to manufacture and filtration and raw water The continuous concentration and discharge of suspended solids in the water provides long filtration duration, low backwashing frequency and low backwashing quantity, and easy to cope with changes in the water quality of the feed water, and provides a filtration device that can obtain usable filtration water quality. There is a purpose.

Still another object of the present invention is to provide a filtration apparatus that can effectively and economically remove suspended matter such as particulates and algae in water.

Another object of the present invention is to fix one end of the filter medium to the filter medium fixing flange having a backwash air distribution port or the filter medium fixing flange formed with a backwash water distribution port, by filling the filter medium in the longitudinal direction of the filtering device, The present invention provides a filtration apparatus that can control the porosity, pore size, and filtered water quality according to the type and quantity of flexible fiber yarn as a filter medium, supply pressure of raw water flowing into the upstream, and the shape of the trapped particle leakage preventing plate.

Another object of the present invention is to provide a filtration device to improve the durability of the media by preventing the mechanical force does not act on the relaxation, shrinkage of the media during filtration and backwash.

Another object of the present invention, when backwashing the backwash water is injected in the vertical direction of the filtration apparatus in the backwash water supply pipe, the backwashing air is injected in the horizontal direction through the backwash air distribution port in the backwash air supply pipe Of course, the present invention provides a filtration device that is injected vertically through the air inlet of the back washing air porous tube and the back washing air supply pipe below the filtration device.

Another object of the present invention is to filter the backwash water during backwashing in the horizontal direction of the filtration apparatus through the backwash water distribution port in the backwash water supply pipe and inject the air in the vertical direction through the backwashing air supply pipe at the bottom of the filtration apparatus. To provide a device.

Another object of the present invention is that the backwash water and the backwashing air injected into the filtration apparatus cross each other in the filtration apparatus to form turbulent flow, and the turbulence is vertically expanded and relaxed by the turbulence, thereby desorbing the suspended matter trapped in the media. It is to provide a filtration device that is easily achieved in a short time.

1 is a block diagram of an apparatus for filtering suspended solids in water according to the present invention.

Figure 2a is a plan view of the media fixing flange is formed with a back-air air distribution port according to the present invention.

Figure 2b is a plan view of the media fixing flange is formed with a backwash water distributor in accordance with another embodiment of the present invention.

Figure 2c is a cross-sectional view of the back air cleaning porous tube according to the present invention.

3 is a view showing the installation form of the capture particle leakage preventing plate according to the present invention,

3a is a sectional view of the straight installation form of FIG. 1, FIG.

3b is a cross-sectional view of the inverted triangle installation form of FIG. 1;

3c is a cross-sectional view of the triangular installation form of FIG.

3d is a sectional view of the straight installation form of FIG. 4, FIG.

3E is a cross-sectional view of the inverted triangle installation form for FIG. 4;

3F is a cross sectional view of the triangular mounting form of FIG. 4;

Figure 4 is a block diagram of an underwater suspended solids filtration device according to another embodiment of the present invention.

5 is an overall configuration diagram of the filtration device of the present invention with respect to the backwash water vertical inlet structure of FIG.

6 is an overall configuration diagram of the filtration device of the present invention with respect to the backwash water horizontal inlet structure of FIG.

<Description of the symbols for the main parts of the drawings>

1: Back-flushing air supply pipe 1a: Back-flushing air supply valve

1b: Flanged fixing flange 1d: Back air perforated pipe

2, 17: raw water supply pipe 2a, 17a: raw water supply valve

3, 16: backwash water supply pipe 3a, 16a: backwash water supply valve

4: backwash water discharge pipe 4a: backwash water discharge valve

5: Continuous concentrate discharge pipe 5a: Continuous concentrate discharge valve

6: Filtrate discharge pipe 6a: Filtrate discharge valve

7: Lower backwash air supply pipe 7a: Lower backwash air supply valve

8: filtration layer (extra layer) 9: pressure gauge

10: flow meter 11: straight-line trapped particle leakage prevention plate

12: reverse triangle trapped particle leakage prevention plate

13: triangular trapping particle leakage prevention plate

14: Perforated plate for influent distribution, media support and compression

15: filter flange 18: flange coupling joint

19: media fixing fixture 20: backwash air distribution port

21: backwash water distribution port 22: air inlet port of backwashing porous

23: raw water and backwash water supply pump 24: backwash air supply pump

50: pipe member 100, 100 ': filtering device

Filtration device according to the present invention for achieving the above object,

A filtration apparatus for filtering and removing various suspended solids or suspended solids contained in water, the fibrous yarn for trapping and filtering the suspended solids contained in the feed water supplied to the duct member installed in a predetermined duct member. Media means for the material; A flange means for fixing one end of the media means and having a plurality of distribution holes formed with a plurality of distribution holes for distributing backwash material such as air or backwash water for back washing the media means; Capture particle outflow prevention means installed in response to the inflow state of the feed water filtered by the filter means, the density (filling density) of the filter means, and the trapped particle state of the suspended suspended solids; Raw water supply means and backwash material supply means for supplying the supply source water and the backwash material to the filter means, respectively; And filtered water discharge means, discharge material discharge means and backwash water discharge means for discharging the clean filtrate filtered by the filter means, the suspended solids captured by the filter means, and the backwash water, respectively. There is a characteristic.

In a preferred embodiment of the present invention, the backwashing material supply means comprises an air supply means for supplying air and a backwash water supply means for supplying backwash water, and the air supply means is air in a horizontal direction of the media means. It consists of a horizontal air supply means for introducing the air and a vertical air supply means for introducing air in the vertical direction of the filter means.

In a preferred embodiment of the present invention, desorption of the suspended solids captured by the filter means by forming turbulent flow such that the backwash water and the air cross each other in the filter device perpendicularly to each other to expand in the vertical direction. One end of the filtering means is left in an unfixed state so as to be easy.

In a preferred embodiment of the present invention, each of the air supply means and backwash water supply means, raw water supply means, filtered water discharge means, backwash water discharge means and suspended matter discharge means is provided with a valve for supply and discharge,

During the filtration process, the raw water introduced by the predetermined raw water supply pump while the air supply valve, the backwash water supply valve and the backwash water discharge valve are closed, and the raw water supply valve, the continuous concentrate discharge valve and the filtrate discharge valve are open. The suspended solid concentrate concentrated through the filter means and discharged to the filtered water discharge means and captured by the filter means is continuously discharged simultaneously with filtration to the continuous concentrate discharge pipe.

During the backwashing step of the filter means, backwashing of the filtration device is achieved with the raw water supply valve and the filtrate discharge valve closed and the air supply valve, the backwash water supply valve and the backwash water discharge valve open.

In a preferred embodiment of the present invention, the filter medium is installed in the same direction as the installation direction of the filter medium, and a plurality of air injection holes are formed so that the backwash air is injected in the vertical direction of the filter medium through the hole. A backwashing porous tube, which is a pipe member of shorter length than the means.

In a preferred embodiment of the present invention, when the dispensing port of the filter means fixing flange means distributes the backwash water in the horizontal direction of the filter medium, the backwash air is supplied in the vertical direction of the filter medium. Become,

When the dispensing port of the filter means flange means distributes the backwash air in the horizontal direction of the filter means, the backwash air by the backwash water and other air supply means is supplied together in the vertical direction of the filter means. do.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the filtration device of the underwater (solid) water in accordance with the present invention. In the following description of the present invention, when it is determined that detailed descriptions of related well-known technologies or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, and may vary according to a user's or operator's intention or custom. Therefore, the definition should be made based on the contents throughout the specification.

1 is a block diagram of a backwash water vertical inlet type suspended solids (concentrate) continuous discharge type precision filtration device 100 according to the present invention, Figure 4 is a backwash water horizontal inlet type according to another embodiment of the present invention It is a block diagram of the continuous concentrate discharge type | mold microfiltration apparatus 100 '. Figure 2a is a plan view of the filter medium for fixing the flange for backwash air distribution port formed in accordance with the present invention, Figure 2b is a plan view of the medium for fixing the filter medium for backwash water distribution port formed in accordance with another embodiment of the present invention, Figure 2c It is sectional drawing of the air perforation pipe for back washing which concerns on this invention. And, Figure 3 is a view showing the installation form of the capture particle leakage preventing plate according to the present invention, Figure 3a is a cross-sectional view of the straight installation form for Figure 1, Figure 3b is a cross-sectional view of the inverted triangle installation form for Figure 1, FIG. 3C is a cross-sectional view of the triangular mounting form for FIG. 1, FIG. 3D is a cross-sectional view of the straight installation form for FIG. 4, FIG. 3E is a cross-sectional view of the inverted triangle installation form for FIG. 4, and FIG. 3F is a triangular installation form for FIG. 4. It is a cross section of. FIG. 5 is an overall configuration diagram of the filtration device of the present invention with respect to the backwash water vertical flow inlet structure of FIG. 1, and FIG. 6 is an overall configuration diagram of the filtration device of the present invention with respect to the backwash water horizontal flow inflow structure of FIG. 4. to be.

First, referring to FIG. 1, this is an embodiment of a continuous concentrate discharge type microfiltration device 100 having a vertical inflow of backwash water, using a fiber yarn having flexibility and elasticity and suitable surface roughness and thickness as a medium. Here, the medium is preferably nylon yarn activated carbon fiber yarn, fiber yarn foamed with PP or PE.

One end of the filter medium forming the filter layer 8 is fixed to the filter medium fastener 19 of the filter medium fixing flange 1b having the backwashing air distribution hole 20 (FIG. It is built in the horizontal direction in the pipeline member 50 of the filtration apparatus 100 in such a state that it is maintained. The back washing air supply pipe (1) on the left side of the filtration device (100), the raw water supply pipe (2) and the back washing water supply pipe (3) on the lower left side, the back washing air supply pipe (7) on the bottom of the filtration device, the back washing water on the right side At the discharge pipe 4 and the lower right side, a continuous concentrated liquid discharge pipe 5 is disposed for filtration and a large amount of suspended solids trapped on the surface of the filtrate layer 8 is concentrated and discharged. A filtrate discharge pipe 6 is disposed above the filtration device 100, and an automatic valve is attached to each supply and discharge pipe. The left and right sides of the filtration device 100 are connected by a flange 15 that can be opened and closed to allow the filling and replacement of the filter medium, and the left flange is a backwashing air powder capable of injecting the backwashing air in a horizontal direction. The median fixing flange 1b having the volleyball 20 (FIG. 2A) and the backwashing air porous pipe 1d (FIG. 2C) capable of injecting the backwashing air in the vertical direction can be mounted.

A trapped particle outflow prevention plate 11 (FIG. 3A) 12 (FIG. 3B) 13 (FIG. 3C) which prevents the outflow of trapped particles through the filter media and the built-in filter media during filtration is provided with a conduit member 50 of the filtration device. ) Is installed left and right, between the left and right capture particle outflow prevention plate (11, 12, 13) so that the appropriate pore and porosity of the filter layer can be maintained according to the supply pressure of the raw water introduced through the raw water supply pipe (2) And a feed plate for proper distribution in the longitudinal direction of the filtration device 100 and an inlet distribution and media support and compression porous plate 14 for concentrating and discharging the trapped particles under the filter layer 8. The influent distribution and media support and compression porous plate 14 has a function to smoothly discharge the suspended solids concentrated in the bottom of the filtrate 8 through the continuous concentrate outlet 5 during filtration.

4 is a view illustrating an embodiment of a continuous concentrated liquid discharge type precision filtration device 100 'having a backwash water vertical inflow type according to another embodiment of the present invention, which is shown in FIG. The backwashing water supply pipe 16 is injected in the horizontal direction, and the backwashing air supply pipe 7 at the lower part of the filtration device is a filtration device 100 'of the vertical injection method. In this embodiment, the backwash water is horizontal in the backwash water supply pipe 16 through the backwash water distribution port 21 (FIG. 2B), and the backwashing air is a backwashing air supply pipe 7 under the filtration device 100 '. It is the same as the filtration apparatus 100 of FIG. 1 except that it is introduced in the vertical direction through, and the back washing air porous pipe (1d; Fig. 2c) is not equipped, the inflow suspended matter is organic floating material In this case, a method for enhancing the desorption effect of the particles trapped in the filter layer 8 and trapping particles spill prevention plate 11 to prevent the outflow of trapped particles through the built-in filter media and the filter interface during filtration 11 (Fig. 3d, 12; 3e and 13 (FIG. 3f) are provided left and right in the pipeline member 50 of the filtration apparatus.

Referring to Figures 1 to 4 the action of the present invention filter device 100, 100 'configured as described above are as follows.

First, the operation of the filtration device of the present invention for removing suspended matter such as particulates and algae in the water consists of a filtration process and a backwash process.

Referring to Figures 1 and 5, the filtration process in the present invention filter apparatus 100 of the backwash water vertical inlet type is as follows.

The backwash water supply valve (3a), the backwash air supply valve (1a), the backwash water discharge valve (4a), and the backwash air supply valve (7a) below the filtration device 100 are closed and the raw water supply valve (2a) When the filtered water discharge valve 6a and the continuous concentrate discharge valve 5a are opened and the raw water is introduced into the filtration apparatus 100 through the raw water supply pipe 2 by the operation of the raw water supply pump 23, the filtrate 8 In the suspended solids contained in the raw water is filtered and the filtered water is discharged through the filtered water discharge pipe (6).

Referring to Figures 4 and 6, looking at the filtration process of another embodiment of the present invention. In this embodiment, the backwash water is introduced into the horizontal direction of the filtering device 100 'in order to increase the backwashing effect of the viscous suspended solid material.

In this form, the backwash water supply valve 16a, the backwash air supply valve 7a and the backwash water discharge valve 4a at the bottom of the filtration device 100 'are closed during filtration, and the raw water supply valve 17a and the filtered water are closed. When the discharge valve 6a and the continuous concentrate discharge valve 5a are operated in the open state, the raw water supply pump 23 is operated, and the raw water is introduced through the raw water supply pipe 17 and filtered by the filtrate 8. The filtered filtrate is discharged to the filtrate discharge pipe (6). The filtration device 100 ′ of FIG. 4 is the same as the backwash water vertical inlet filtration device 100 of FIG. 1 except that the backwashing water and the backwashing air supply method are different.

1 and 4, suspended solids in raw water larger than the pores of the filtrate 8 are trapped in the filtrate 8 depending on the particle size during the upflow filtration process. Among the suspended solids trapped, the suspended solids having a relatively large particle diameter on the surface of the filtered layer 8, that is, the suspended solids having a large permeation resistance of the filtered layer 8 are accumulated under the filtered layer 8, and the accumulated suspended solids are collected on the filtered layer 8. Concentrated at the bottom and discharged simultaneously with filtration through the continuous concentrate discharge pipe (5). Due to the filtration property of continuously condensing and discharging suspended solids trapped in the filtrate (8), it is possible to reduce the filtration resistance caused by the suspended solids trapped in the filtrate (8) during filtration. Break-through can be prevented. The porosity and pore size of the filtrate 8 during filtration are controlled by the type, thickness, filling density and shape of the trapped particles 11, 12, 13, and raw water supply pressure. Therefore, it is easy to control the amount and quality of the filtered water according to the purpose of using the filtered water, and also has the effect of multi-layer filtration in which the entire filter layer 8 is composed of the particle trapping space, thereby increasing the particle trapping capacity of the filter layer 8 and the filtration duration. Can be increased and the frequency of backwashing can be reduced.

As the filtration process continues, increasing the amount of suspended solids trapped in the media increases the filtration resistance and decreases the filtration rate, thus reducing the amount of filtered water. Therefore, when the quantity to be filtered decreases below the set target quantity or when the filtration pressure becomes higher than the set value, the flowmeter 10 attached to the filtered water discharge pipe 6 or the pressure gauge 9 attached to the raw water supply pipes 2 and 17 Detect and backwash process starts.

In the backwashing process in one embodiment of the present invention, the backwash water vertical inflow type of FIG. 1, the operation of the raw water supply pump 23 is stopped and the raw water supply valve 2a and the filtrate discharge valve 6a are closed and filtered. The backwash air supply valve 1a, the backwash water supply valve 3a and the backwash water discharge valve 4a on the left side of the apparatus are opened, and the backwash air supply pump 24 and the backwash water supply pump 23 are operated. The backwashing process takes place within the set time in the set state.

In the backwashing action of the embodiment of the present invention, which is the vertical inflow type of backwashing water of FIG. 1, the shaking of the media is made stronger within the backwashing time set to smoothly remove the suspended solids trapped in the media during backwashing. , The shaking of the filter medium for backwashing the air pressure and backwashing perforated pipe (1d; Fig. 2c) and the lower part of the filtering device in the horizontal direction in the filtration device 100 in the backwash air distribution port (20; Fig. 2a) The media is expanded in the vertical direction by the vector force of the air pressure injected in the vertical direction in the air supply pipe 7 and the water pressure injected in the vertical direction in the backwash water supply pipe 3, so that the shaking of the media becomes stronger and the force Desorption of the particles trapped in the filter medium is easily made within a short time, at which time the backwashed concentrated water is discharged to the backwash water discharge pipe (4). After sufficient desorption of the suspended solids trapped in the filtrate within the set backwash time, the process is switched back to the filtration process.

In the backwashing process according to another embodiment of the present invention, which has a horizontal inflow water type in FIG. 4, the operation of the raw water supply pump 23 is stopped, and the raw water supply valve 17a and the filtrate discharge valve 6a are closed and filtered. The backwash air supply valve 7a, the backwash water discharge valve 4a, and the backwash water supply valve 16a at the bottom of the apparatus 100 'are opened, and the backwash water supply pump 23 and the backwash air supply pump ( The backwashing process is performed in the state of operating 24), except that the backwashing water and the backwashing air supply method for backwashing are the same as the backwashing water vertical inflow type filtration device 100 of FIG. 1.

Looking at the backwashing action of another embodiment of the present invention of the backwash water horizontal flow type of Figure 4, the backwash water pressure and filtration injected horizontally through the backwash water supply pipe 16 to the backwash water distribution port 21 (Fig. 2b) The media is expanded in the vertical direction by the vector force with the air pressure injected in the vertical direction through the back washing air supply pipe 7 below the apparatus 100 'to strengthen the shaking of the media, and by this force Desorption of the trapped particles in the) is discharged to the backwash discharge pipe, and the process is switched back to the filtration process at the end of the set backwash time.

Referring to the operating principle of the present invention filtration device 100, 100 'shown in Figures 1 and 4 and 5 and 6 as follows.

That is, the operation of the valves and the raw water supply pump 23 to be opened and closed during filtration is made by a time control program, and the valves and the air supply pump 24 and the backwash water supply pump 23 to be opened and closed at the time of back washing are performed. Whether the operation is to be controlled by a sensor attached to the flow meter 10 or the pressure gauge (9).

Looking at the characteristics of the present invention filtration device (100, 100 ') are as follows.

Multi-layer filtration effect can be expected because the entire filter layer 8 is used as a filter area and a particle capture space, and the porosity and pore size of the media are controlled by the media fill density and raw water supply pressure to determine the amount of effluent and the quality of the water. In addition, depending on the shape of the trapped particle outflow prevention plate (11, 12, 13), the particle size of the filtration separation of the trapped particle is determined. That is, when the horizontal trapped particle outflow prevention plate 11 is installed as shown in FIGS. 3A and 3D under the conditions of the same filling density and raw water supply pressure, the consolidation space of the filtrate 8 becomes narrow, and 8) increases the density and minimizes the porosity and porosity, so the filtration rate and the amount of filtration are small, but precise filtration quality can be obtained.

When the reverse triangular trapping particle leakage preventing plate 12 is installed as shown in FIGS. 3B and 3E, the porosity and the pore size of the filtrate are relatively increased due to the increase in the median compressive force action area due to the raw water supply pressure. The speed and the amount of filtered water are increased, but the quality of the filtered water is lower than that of the straight trapped particle leakage preventing plate 11 of FIGS. 3A and 3D.

3C and 3F, when the triangular trapped particle outflow prevention plate 13 is installed, the compressive force action area, the filtration speed, and the amount of filtration water of the medium are relatively intermediate between the horizontal and inverted triangles or the depth of formation of the filtrate is relatively increased. The filtration rate and the amount of filtered water are larger than the linear trapped particle outlet plate 11 of FIGS. 3A and 3D but less than the inverted triangle trapped particle leakage prevention plate 12 of FIGS. 3B and 3E. It is characterized by being able to obtain a more precise filtered water quality than the prevention plate 11 and slightly falling behind the trapezoid trapping particle 12.

In the filtration apparatus of the present invention, the filter medium fixing flange 1b having the backwashing air distribution port 20 (FIG. 2A) and the filter medium fixing flange 1b having the backwashing water distribution port 21 (FIG. 2B) are formed of media filter fixtures. (19) and backwash air distribution port (20) and backwash water distribution port (21) are radially designed, and target filtration rate, filtration water quality, filtration water quality, filtration duration, backwash frequency and backwash effect, etc. Accordingly, the size and quantity of the filter medium fixture 19, the back-flushing air distribution port 20 (FIG. 2A) and the back-wash water distribution port 21 (FIG. 2B) may be different.

To increase filtration duration, reduce backwash frequency, and increase particle capture under the same conditions, increase the length of the filtration device (100, 100 '), increase the cross-sectional area, and the type and packing density of the fibrous fiber as a filter medium The shape of (11, 12, 13) etc. can be adjusted.

When the backwash water vertical inlet filtration device 100 according to an embodiment of the present invention (FIG. 1) and the backwash water horizontal inlet filtration device 100 '(FIG. 4) are compared, the filtration operation is the same. The principle is different. In addition, there is a difference in that the back washing compressed air porous pipe 1d (FIG. 2C) attached to the filtration device 100 of FIG. 1 is not installed in the filtration device 100 'of FIG.

As described above, FIG. 5 is an overall view of the backwash water vertical inflow filtration device (FIG. 1), and FIG. 6 is an overall view of the backwash water horizontal inflow filtration device (FIG. 2) and may be operated automatically or manually. .

<Example 1>

In the backwash water vertical inlet concentrate continuous discharge type microfiltration device of FIG. 1 having a diameter of 200 mm and a length of 1,500 mm, a straight trapped particle leak prevention plate 11 as shown in FIG. The filter apparatus of the present invention filled with 0.7 g / cm ³ was filtered for 6 months using biologically treated water having an average suspended solids concentration of 40 mg / L, 60 mg / L, 80 mg / L, and 100 mg / L.

The filtration duration of the filtration device is the time from the start of the filtration to the start of the backwash, and the backwashing time was determined to be 70% of the initial filtrate amount, the backwash time was 3 minutes, the backwash amount was the amount of filtered water. The backwash was fixed at 1% of.

As a result of collecting and analyzing the effluent filtered from this filtration system, the linear velocity of filtration was 10m ³ / hr on average regardless of the concentration of suspended solids in the feed water. At L and 100mg / L, the average filtration duration was 12.5 hours, 8.3 hours, 6.3 hours, and 5 hours, respectively. The average suspended solids concentration in the filtration effluent was 0.7 mg / L or less regardless of the concentration of the feed water. It was found to be suitable for.

In this case, the average amount of particles trapped in the filter layer 8 of the filtration device was about 5 kg / time during the filtration process, and the average separation particle size was 3 μm when the effluent was analyzed.

<Example 2>

The result of the filtration operation under the same conditions as in Example 1, except that the reverse triangular trapped particle outflow prevention plate 12 as shown in FIG. 3b is used, and the filtration line velocity is 20 m ^{3 on} average regardless of the concentration of suspended solids in the feed water. / hr, the suspended solids concentration of feed water is 40mg / L, 60mg / L, 80mg / L, 100mg / L, and the average filtration duration is 10 hours, 6.6 hours, 5 hours, 4 hours, respectively. The substance concentration was higher than that of Example 1 with an average of 2 mg / L or less regardless of the concentration of the feed water.

In this case, the average amount of particles trapped in the filtration layer 8 of the filtration device at the time of one filtration in the filtration process was about 8 kg / time, and the average separation particle size was 10 탆 as a result of particle size analysis of the effluent.

<Example 3>

The result of the filtration operation under the same conditions as in Example 1, except that the triangular trapped particle leakage preventing plate 13 as shown in FIG. 3C was used, the linear velocity of the filter was 15 m ³ / average regardless of the concentration of suspended solids in the feed water. hr, the suspended solids concentration of feed water is 40mg / L, 60mg / L, 80mg / L, 100mg / L, and the average filtration duration is 13.3 hours, 8.8 hours, 6.7 hours, 5.3 hours, respectively. The concentration was higher than that of Example 1 but lower than that of Example 2, with an average of 1 mg / L or less regardless of the concentration of the feed water.

In this case, the average amount of particles trapped in the filter layer 8 of the filtration device at the time of one filtration in the filtration process was about 8 kg / time, and the average separation particle size was 5 탆 as a result of particle size analysis of the effluent.

Comparative Example 1

In order to examine the backwashing effect of the organic suspended solids in the biologically treated water, the backwash water horizontal inlet concentrate continuously discharge-type fine filtration apparatus 100 '(FIG. 4) is not equipped with a backwashing air porous tube 1d. Except for the experiment using the linear trapping particle leakage preventing plate 11, the reverse triangular trapping particle leakage preventing plate 12 as shown in Figure 3e and the triangular capture particle leakage preventing plate 13 as shown in Figure 3f as shown in FIG. As a result of the filtration operation under the same conditions as in Example 1, the filtration duration, the concentration of suspended solids in the filtered water, and the amount of particle trapped were similarly investigated in Examples 1, 2, and 3, but the backwashing time was within 2 minutes. In the case of filtration of raw water containing organic suspended solids as shown in the above example, when the backwashing quantity is within 0.5%, the continuous backflow of the backwashing water as in FIG. 4 is continuously discharged. It has been found that the use of a type precision filtration device is effective.

As described above, according to the present invention, a small-capacity filtration device can filter a large amount of source water and obtain a high-purity filtered water quality that can be used as a heavy water, and it is easy to cope with various operating conditions such as changes in quantity and water quality. Due to the use of flexible fiber yarns of various thicknesses and properties used as the media, the installation cost is low. Compared with other filtration methods, the pressure loss required for filtration is low, and the maintenance cost is low because the media is durable. Therefore, it is possible to provide various sizes of porosity and porosity by adjusting raw water supply pressure, filling density of filter media, and location and shape of trapped particle leakage preventing plate, and it is possible to change backwashing method according to the property of suspended solids in feed water. It is not only flexible in operation, but also can be applied as solid-liquid separation device for suspended matter of various properties. It provides a possible advantage.

In addition, the present invention is designed to amplify the vibration of the flexible media by the compressed air during backwashing, it is possible to detach the suspended matter trapped in the filter bed in a short time provides an advantage to minimize the amount of backwashing water.

In addition, the present invention is designed to be suspended at the same time the filtration material is concentrated at the same time as the suspended solids trapped on the surface of the filtrate is concentrated and discharged to the concentrated water outlet can extend the filtration duration and reduce the frequency of backwashing fresh water or It is possible to filter and separate various underwater particles such as algae in seawater, organic and inorganic suspended solids in sewage, and suspended solids in cooling water.

Moreover, the present invention can exclude or minimize the sedimentation basin when the filtration device of the present invention is used as a solid-liquid separator of the wastewater treatment system.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains may make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

Claims (14)

In the filtering device for filtering and removing various suspended substances contained in the water, Filter means made of fibrous material for trapping and filtering the suspended solids contained in the feed water supplied to the pipe member and installed in a predetermined pipe member; A flange means for fixing one end of the media means and having a plurality of distribution holes formed with a plurality of distribution holes for distributing backwash material such as air or backwash water for back washing the media means; Capture particle outflow prevention means installed corresponding to an inflow state of the feed water filtered by the filter means and the density of the filter means and the trapped particle state of the suspended suspended solids; Raw water supply means and backwash material supply means for supplying the supply source water and the backwash material to the filter means, respectively; And Filtrate characterized in that it comprises a; filtered water discharge means for discharging the filtered water filtered by the filter medium, the suspended solids captured by the filter medium and the backwash water, and continuous concentrated liquid discharge means and backwash water discharge means; Device. According to claim 1, wherein the backwashing material supply means comprises an air supply means for supplying the air for backwashing and the backwash water supply means for supplying the backwash water, The back washing air supply means comprises a horizontal air supply means for introducing air in the horizontal direction of the filter means and a vertical air supply means for introducing air in the vertical direction of the filter means. The method of claim 1, wherein the size and number of dispensing holes for distributing the backwashing material formed in the flange means for fixing the filter medium means and the arrangement position are to be changed according to the filling density of the filter medium means. Device. According to claim 1, The flange means for fixing the filter means is formed a plurality of fasteners for fixing the filter means, the size and number of the fastener is characterized in that it can be adjusted according to the filling density of the filter means Filtration device. The method of claim 1, further comprising a porous plate means for supporting the filter means of the porous plate shape is installed in the lower portion of the filter means to support the filter medium and to control the filling density of the filter medium to maintain the appropriate porosity and porosity and, The porous plate means is to uniformly distribute the raw water and the backwash material flowing into the filter medium throughout the filter medium, Filtration apparatus characterized in that the suspended solids of the particles larger than the suspended solids filtered in the filter means can be continuously discharged to the suspended solids discharge means. The method of claim 1, wherein the installation angle, shape and size of the trapped particle outflow prevention means can be selected in a horizontal, inverted triangle and triangular structure according to the size and porosity of the filter medium and the filtered water quality and the amount of filtered water. Filtration device characterized in that. The filtration member according to claim 1, wherein the conduit member in which the filter means is installed is configured such that the backwash water flows vertically into the filter means when the suspended solids contained in the feed water are inorganic. Device. The filtration member according to claim 1, wherein the conduit member in which the filter means is installed is configured such that the backwash water flows horizontally into the filter means when the suspended solids contained in the feed water are organic. Device. The method of claim 1, wherein the backwash water and the air to form a turbulent flow so as to vertically cross each other in the filter device to expand in the vertical direction to facilitate the desorption of the suspended solids trapped by the media means. Filtration device, characterized in that one end of the filter means to be in an unfixed state. The air supply means, the backwash water supply means, the raw water supply means, the filtrate water discharge means, the backwash water discharge means, and the suspended solids discharge means, respectively. Is provided with a valve for During the filtration process, the raw water introduced by the predetermined raw water supply pump while the air supply valve, the backwash water supply valve and the backwash water discharge valve are closed, and the raw water supply valve, the floating material discharge valve, and the filtrate discharge valve are open. Passed through the filter means is discharged to the filtered water discharge means and the suspended solid concentrate concentrated by the filter means is continuously discharged to the suspended material discharge pipe, During the backwashing step of the filter means, the backwashing of the filtration device is achieved while the raw water supply valve and the filtrate discharge valve are closed and the air supply valve, the backwash water supply valve and the backwash water discharge valve are opened. Filtration device. The method of claim 10, wherein each of the raw water supply means and the filtered water discharge means is equipped with a pressure measuring means for detecting and measuring the inlet pressure of the feed water and the flow rate measuring means for detecting and measuring the amount of filtered water discharged, When the inflow pressure of the raw water detected by the pressure measuring means is equal to or greater than a predetermined target pressure value or the discharge of the filtered water detected by the flow rate measuring means is equal to or less than a predetermined target quantity value, the backwashing process of the filtration device is performed. Filtration device, characterized in that to proceed. According to claim 1, It is installed in the same direction as the installation direction of the filter means, a plurality of air discharge holes are formed shorter than the filter means for discharging the backwash air in the vertical direction of the filter means through the hole The suspended solids filtering device, characterized in that it comprises a pipe member of the length of the pipe. The apparatus for filtering suspended solids according to claim 2 or 12, wherein a through hole into which the pipe member is inserted is formed in the flange means fixing flange means, and the pipe member is connected to the air horizontal supply means. The backwashing air according to claim 1 or 2, wherein the backwashing air is supplied in the vertical direction of the mediator means, when the distribution port of the mediator means fixing flange means distributes the backwash water in the horizontal direction of the mediator means. Will be When the dispensing port of the filter means flange means distributes the backwash air in the horizontal direction of the filter means, the backwash air by the backwash water and other air supply means is supplied together in the vertical direction of the filter means. Suspended material filtering device, characterized in that.