KR100606479B1 - Horizontal high-speed filter using fiber filter element - Google Patents

Abstract

In the filtration apparatus of the present invention, the airtight synthetic resin fibrous media (5, 6) having a high strength and porosity and easy adjustment of specific gravity are filled in the horizontally closed hermetic filtration tank 1, and the raw water is supplied from the bottom and treated water. Is extracted from the top. In order to regenerate the contaminated fibrous media (5, 6), a combination of air from the stirrer (9) with a plurality of stirring vanes (11a, 11b, 11c) and the diffuser (8) generates a strong swirl flow. Therefore, since the fiber media 5 and 6 can be washed and regenerated efficiently in a short time, a high filtration rate can be continuously obtained, and a high-speed large-capacity treatment is possible for a long time.

Filtration Units, Floating Fiber Media, Diffusers, Collectors, Screw Conveyors, Needle Punching

Description

HORIZONTAL HIGH-SPEED FILTER USING FIBER FILTER ELEMENT}

1 is a front view of a horizontal high speed filtration apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view of the horizontal high speed filtration apparatus of FIG. 1.

3 is a longitudinal cross-sectional view of a horizontal high speed filtration device taken along line III-III of FIG. 1.

4 (A) is a detailed view of the stirrer of FIG.

Fig. 4B is a front view showing the stirring blade in the direction of arrow IVB in Fig. 4A.

4: (C) is a front view which shows the stirring blade in the arrow IVC direction of FIG. 4 (A).

FIG. 5A is a flowchart of the horizontal high speed filtration apparatus of FIG. 1.

Fig. 5B is a view showing the installation position of the diffuser in the horizontal high speed filtration apparatus of Fig. 1.

6 is a time chart diagram according to the horizontal high speed filtration apparatus of FIG.

7 is a perspective view showing a unit piece of the fiber media according to the present invention.

8 is a perspective view showing another embodiment of a unit piece of the fiber media according to the present invention.

It is sectional drawing which shows the horizontal high speed filtration apparatus which concerns on 2nd Embodiment of this invention.

10 is a detailed view illustrating a screw conveyor of the horizontal high speed filtration apparatus of FIG. 9.

11A to 11D are plan views showing punching metals used for the collecting plate of FIG. 3 and the screen of FIG. 10.

TECHNICAL FIELD The present invention relates to an improvement of a filter filled with floating synthetic resin fiber media, and more particularly, to an upflow type horizontal high speed filtration device which enables high speed filtration and microfiltration. It is about improvement.

Generally, in the filter using the flotation filter, a screen for preventing the loss of the filter is installed in the upper part of the filter tank. The bottom of this screen is filled with floating media to form a layer of media. The filter performs a filtration process in which raw water is passed through the liquid from the bottom of the filtration tank in an upward flow to perform solid-liquid separation in the filter media layer.

SUMMARY OF THE INVENTION An object of the present invention is to provide a horizontal high-speed filtration apparatus which can obtain a high filtration rate by forming a filter medium layer of a floating synthetic resin fibrous material having high strength and excellent compressibility, and efficiently performing a filtration treatment in accordance with the properties of a stock solution. It is.

A first aspect of the invention provides a horizontal high speed filtration apparatus using a fibrous media. The filtration device of the present invention forms a filter media layer 7 filled with the flotation fibrous media 5 and 6 and includes a hermetic filtration tank 1 installed horizontally. The filtration tank 1 supplies raw water from the bottom part of the filtration tank 1, and discharges the process liquid isolate | separated from the filter medium layer 7 from the top part of the filtration tank 1. The filtration device includes a collecting plate (2) having a plurality of small holes and installed horizontally on the upper portion of the filtration tank (1). The filtering device comprises an upper collecting chamber 3 and a lower filtering chamber 4 partitioned by a collecting plate 2. The filtration device comprises an diffuser 8 arranged near one circumferential wall under the filtration chamber 4, and a filter layer 7 near the other circumferential wall under the filtration chamber 4. It includes a stirrer (9) disposed below from the bottom.

In a preferred embodiment, the fibrous mediar 5, 6 is a nonwoven fibrous mediar composed of synthetic resin fibers having three different fiber diameters. The fiber media is a heat-sealable composite fiber coated with polyethylene on a polypropylene core and includes a first filament 5a having a fineness of 18 to 65 deniers. The fiber media comprises a second filament 5b whose material is polypropylene fiber and has a fineness of 3 to 10 deniers. The fibrous media is a heat-sealable composite fiber coated with polyethylene on a polypropylene core and comprises a third filament 5c having a fineness of 1.5 to 6 deniers. The fiber media (5, 6) is made of a web of the blended fibers of each fiber (needle punching) to form a fabric, and heated without smoothing the state of raising both sides of the web It is processed to make a plate-shaped object, and the said plate-shaped object is cut | disconnected. The cut fibrous media (5, 6) is made into a cube or cube having an apparent specific gravity of 0.7 to 0.92, a thickness of 3 to 30 mm, a width of 5 to 30 mm, and a length of 5 to 30 mm. The fiber media 5 and 6 sandwich the foamable resin plate 6a into the plate-like body and join and cut it to adjust the apparent specific gravity to 0.92 or less.

As a preferable aspect, the stirring blade is arrange | positioned in the several position in the shaft 10 of the said stirrer 9. The stirring blades 11a and 11b provided in the vicinity of both side walls make the inclination of about 45 degree with respect to the axis center, and the other stirring blades 11c are provided in parallel with the axis center. One end of the shaft 10 is connected to the driver 30 through the side wall of the filtration tank 1.

In a preferred embodiment, at least one diffuser 8 is provided at a position of 15 to 75 degrees below the horizontal axis of the filtration tank 1.

As a preferable embodiment, when the stirring of the filter medium layer 7 is performed in combination with the stirrer 9 and the diffuser 8, the amount of air used in the acid group is 10 to 20 Nm 3 / m 2 · Hr.

As a preferable embodiment, when the stirrer 9 is stopped and the filter medium layer 7 is stirred by the diffuser 8, the amount of air used in the diffuser is 15 to 25 Nm 3 / m 2 · Hr.

In a preferred embodiment, the filter is installed at the bottom of the filtration tank 1 and has a cylindrical screen 32 having one end to which the raw water supply pipe 34 is connected and the other end to which the drain outlet 35 is opened, and the screen 32. It includes a screw conveyor 33 installed therein.

In a preferred embodiment, a plurality of raw water supply pipes 34 and a plurality of drain outlets 35 are provided below the screen 32.

A filtration device according to a second aspect of the present invention includes a filtration tank for accommodating a fluid which is floatable in the fluid together with the fluid. The filtration device supplies a bubble from a position below the horizontal axis of the filtration tank and spaced apart from the horizontal axis in a horizontal direction to move the media together with the fluid in a rotational direction about the horizontal axis. Include.

In a preferred embodiment, the media comprises a group of fibers having different diameters, and a foam bonded to the group of fibers and having a small apparent specific gravity by the group of fibers.

In a preferred embodiment, the filtration device includes an impeller disposed below the horizontal axis of the filtration tank and moving the fluid in a rotational direction about the horizontal axis of the filtration tank.

In a preferred embodiment, the impeller includes a first wing for moving the fluid along a horizontal axis and a second wing for moving the fluid in a pivoting direction about the horizontal axis.

In a preferred embodiment, the impeller is positioned to face the feeder with respect to the vertical axis of the filtration tank.

In a preferred embodiment, the filtration apparatus includes a screen for removing contaminants from raw water and a conveyor for conveying the contaminants to the outlet.

According to the present invention, the fibrous media to be used is formed by heating a synthetic resin fiber having three different fiber diameters into a plate-like body. The fibrous media is formed by cutting the plate-like body into a medium or by inserting a low specific gravity foamable resin plate between the plate-like bodies and joining them together. Therefore, the specific gravity of the media is optimized in accordance with the stock solution properties and the treatment method, so that even if used for a long time, there is no deterioration in the compression resistance, and the deterioration in the processing capacity is also prevented. Therefore, stable continuous operation can be performed for a long time.

In addition, when the diffuser and the mechanical stirrer are used together to clean and regenerate the floating filtrate having a specific gravity of 1.0 or less according to the present invention, the filtration is efficiently turned by the swirl flow of the stirrer and the air blown out from the diffuser. . Therefore, since the washing of the filter medium is completed in a short time, the amount of air used is small. Moreover, since the some stirring blade is arrange | positioned by extending from one side wall to the other side wall of the filtration tank which installed the shaft of the stirrer horizontally, the media can be efficiently rotated and power is also small.

In addition, since the fiber media of the present invention has a large porosity, the porosity of the media layer is large, the pressure loss is small, and high-speed filtration is possible, so that treated water of stable water quality can be obtained. Stirring blades are arranged in plural positions on the shaft of the stirrer, and stirring blades provided at both ends of the shaft form an inclination of about 45 degrees with respect to the shaft center, and the other stirring blades are provided in parallel with the shaft center. Therefore, the media does not stay during the stirring, and the media is sufficiently washed and regenerated while efficiently turning in the swirl flow generated by the combination of mechanical and air agitation while the media is stirred, and the cleaning time is also shortened. .

In addition, when treating raw water mixed with stones or large solids, the stones or large solids are separated from the screen of the filtration tank and discharged to the outside from the screw conveyor.

The filter according to the present invention is configured as described above, and raw water is supplied into the filtration chamber from the bottom of the filtration tank by a plurality of supply pipes branched from the inlet. In the filtration chamber, a rectifying plate is provided above the supply pipe in parallel with the inflow direction of the raw water. Raw water is supplied into the filtration chamber evenly along this rectifying plate. Solids contained in the raw water are captured in the media layer while raising the media layer formed of the flotation fibrous media. The separated treated water flows into the collection chamber evenly from a plurality of small holes drilled in the front surface of the collection plate installed on the upper part of the filtration tank. The treated water collected in the collection chamber is discharged to the outside from the top of the filtration tank. In this way, if the filtration operation is continued, clogging occurs in the filter medium layer, and if the filtration rate gradually decreases, the filter medium needs to be washed and regenerated. In order to clean and regenerate the filter medium, first, the inflow of raw water is stopped and the drain valve is opened to discharge the elements in the filtration chamber. At this time, the treated water in the collecting chamber passes through the collecting plate to be replaced with raw water. When the treated water passes through the collecting plate and the water level in the filtration chamber reaches near the lower surface of the collecting plate, the drain valve is closed to stop the discharge of raw water.

On the other hand, the vortex flow is generated in the filtration chamber by driving the stirrer provided in the filtration tank and blowing air through the diffuser. As the media constituting the media layer is turned in this turning flow, the media and the media and the bubbles repeatedly collide with each other, so that the solids adhered to the surface and the interior of the media are peeled off. Since the diffuser is provided in the position which promotes the turning flow by the said stirrer, it can turn to upper part efficiently and can peel a solid substance from a media in a short time. In addition, depending on the contamination condition of the filter medium, the filter medium may be regenerated only by air from the diffuser without using an agitator. Next, the supply of the stirrer and the air is stopped, and the drain valve is opened to discharge the filthy water in the filtration chamber. When the discharge is finished, close the drain valve and open the drain valve while supplying the washing water from the inlet of the raw water. After a predetermined time has elapsed, the stirrer is driven and air is blown out from the diffuser to generate a swirl flow to wash the solids remaining in the media. The cleaning drain is discharged to the outside from the drain valve.

When the cleaning and regeneration of the media are completed as described above, the supply of the stirrer and the air is stopped. Then, the raw water is supplied again, and the supply is continued until the washing waste water remaining in the collection chamber is replaced with the treated water. If the drain valve is closed, the treated water valve is opened, and the filtration operation is started at the time of replacement, the clarified treated water can be taken out again. EMBODIMENT OF THE INVENTION Hereinafter, based on drawing, the Example of the filtration apparatus using the fibrous medium which concerns on this invention is described in detail.

1 is a front view of a filtration apparatus according to a first embodiment of the present invention, and FIG. 2 is a left side view of FIG. 3 is a longitudinal cross-sectional view taken along line III-III of FIG. 1. 1 to 3 will be described in detail with respect to the configuration of the filtration device of the present invention. The cylindrical filtration tank 1 is provided in the horizontal direction, and has a sealed structure. A collecting plate 2 is horizontally installed and installed over the entire surface of the upper portion of the filtration tank 1. The collecting plate 2 is composed of a member having a large number of small holes, such as punching metal, for example. The filtration tank 1 is partitioned by the collecting plate 2. In the filtration tank 1, the upper part of the collecting plate 2 is the collecting chamber 3 and the lower part of the collecting plate 2 is the filtration chamber 4. The raw water is supplied from the inlet port 19 of the raw water communication tube 18 provided in parallel to the filtration tank 1 and passes through the inlet valve 11 mounted between the raw water communication tubes 18. The raw water flows into the filtration tank 1 from the bottom of the filtration tank 1 through a plurality of supply pipes 20 connected to the raw water communication tube 18. The raw liquid introduced into the filtration tank 1 is guided by the rectifying plate 21 spreading out near the upper side of the opening of the supply pipe 20 and is evenly supplied into the filtration chamber 4. The rectifying plate 21 is slightly larger than the width of the opening of the supply pipe 20. The rectifying plate 21 extends from the wall of the filtration tank 1 to the other wall in parallel with the inflow direction of the raw water. In the rectifying plate 21, a member having a plurality of small holes such as a punching metal is used. The filtration chamber 4 is filled with the floating filtrate media 5 and 6 to form a median layer 7 of a predetermined thickness. The thickness of the filter medium layer 7 becomes thick in proportion to the diameter of the filtration tank 1.

Solid matter in the raw water is captured by the filter medium layer 7. Raw water flows into the collecting chamber 3 through the collecting plate 2. A plurality of collecting pipes 31 are connected to the top of the collecting chamber 3. The other end of the collecting pipe 31 is connected to the treated water communicating pipe 22 to form an aggregate. The treated water introduced into the collection chamber 3 is drawn out from the treated water outlet 23 through the treated water valve 13 mounted between the treated water communicating pipes 22. Further, the treated water communication pipe 22 branches from the front of the treated water valve 13, and the drain valve 14 is interposed therebetween and connected to the L-shaped drain pipe 24, and the last end thereof is the drain port 25. It is. And the drain pipe 24 is connected with the drain pipe 26 in which the drain valve 16 was attached in front of the drain port 25. As shown in FIG. The other end of the drain pipe 26 is opened at the bottom of the filtration tank 1. In addition, the diffuser 8 and the stirrer 9 are provided in the filtration chamber 4 in the horizontal longitudinal direction of the filtration tank 1. The diffuser 8 extends along the horizontal axis from one side wall of the filtration tank 1 to the other side wall, and is disposed near the circumferential wall below the filtration chamber 4. The stirrer 9 is located near the circumferential wall on the side opposite to the diffuser 8 with respect to the vertical axis, and is disposed at a position that does not cause interference with the lower surface of the mediator layer 7 during stirring. At the top of the treated water communication pipe 22, an air discharge valve 27 for discharging air in the filtration tank 1 to the atmosphere is provided. The manhole 28 for inspection is installed in the filtration tank 1, and the monitoring window 29 is provided.

Next, the agitator will be described in detail with reference to FIGS. 4A to 4C. The shaft 10 fitted to the driver 30 of the stirrer 9 extends from one side wall of the filtration tank 1 to the vicinity of the other side wall. Both ends of the shaft 10 are provided with stirring vanes 11a and 11b inclined at 45 degrees with respect to the center of the shaft. Both ends of the shaft 10 are supported by bearings 10a at positions adjacent to the stirring vanes 11a and 11b. The bearing 10a is supported by the supporting member 10b fixed to the wall of the filtration tank 1. A plurality of stirring blades 11c are disposed between both bearings 10a in parallel with respect to the shaft center. In addition, in FIG. 4, the stirring vanes 11a are inclined 45 degrees downward with respect to the center of the shaft 10. The stirring blade 11b inclines upward 45 degree with respect to the axis center. The stirring blades 11a and 11b cause a flow toward the center part of the shaft 10, respectively. On the other hand, the stirring vanes 11a and 11b operate so that the fibrous media 5 and 6 near the side wall collect at the center of the filtration tank 1 when the stirrer 9 is driven. Since the stirring blade 11c produces the flow which turns around the shaft 10, it operates so that the fibrous media 5,6 may rotate to an up-down direction, ie, about the horizontal axis of the filtration tank 1. As shown in FIG.

Next, the filtration process of this invention is demonstrated in detail based on the flowchart of FIG. 5 (A), the time chart of FIG. 5 (B), and FIG. In the filtration treatment process, the inlet valve 12 and the treated water valve 13 are opened. Raw water is fed from a raw water pump (not shown) and flows into the filtration chamber 4 of the filtration tank 1 through an inlet valve 12. Solids in the raw water are captured while the raw water flowing into the filtration chamber 4 rises from the lower surface of the filter media layer 7 and passes through the filter media layer 7. The raw water becomes clarified water, passes through the collecting plate 2, is stored in the collecting chamber 3, and is taken out from the upper portion of the collecting chamber 3 to the outside through the treated water valve 13. If the filtration process is continued, the media layer 7 will be clogged with the trapped solids, the pressure in the filtration tank 1 will rise, and the filtration rate will gradually fall. In this state, it is necessary to clean and regenerate the filtration layer 7. In order to detect the blockage of the media layer 7, a pressure switch or the like (not shown) detects the pressure in the filtration tank 1. When the pressure switch detects more than the set pressure, the filtration step is stopped and the stirring and washing step of the filter medium layer 7 is performed.

Next, the stirring and washing step of the filter medium layer 7 will be described. The raw water pump (not shown) is stopped, the inlet valve 12 and the treated water valve 13 are closed, and the filtration process is finished. Next, a stirring preparation process is performed before a stirring process. First, the drain valve 16 is opened, the treated water stored in the collection chamber 3 is flowed back to the filtration chamber 4, and the raw water remaining in the filtration chamber 4 is drained from the drain valve 16. And the drain valve 16 is closed when the liquid level in the filtration chamber 4 becomes lower than the collection plate 2. Subsequently, the process is switched to the stirring step of the filter medium layer 7. First, the stirrer 9 is driven and the air supply valve 15 is opened to supply air from the diffuser 8. The quantity of air used for an acidic radical is 10-20 Nm <3> / m <2> * Hr, for example. The stirrer 9 is rotated in the direction of an arrow P shown in FIG. 5. In this way, a turning flow is generated in the direction of the arrow Q in the lower part of the filtration chamber 4. The turning flow in the direction of the arrow Q is accelerated and increased by the air supplied from the diffuser 8, and becomes the turning flow in the direction of the arrow R in the upper part of the filtration chamber 4. By the turning flows of the arrow Q and the arrow R, the fibrous mediars 5 and 6 constituting the medial layer 7 are turned up and down in these turning flows to collide with the fibrous mediars 5 and 6. It is repeated or collides with the air bubbles from the fibrous media 5 and 6 and the diffuser 8. As a result, the solid matter adhering to the surface and the interior of the fibrous media 5 and 6 is peeled off. The air supplied from the diffuser 8 is discharged into the atmosphere from the air discharge valve 27 provided at the top of the treated water communication pipe 22. Next, the stirrer is stopped, the air supply valve 15 is closed, and the stirring process is completed. Subsequently, the fiber media 5 and 6 are washed. 5 (A) and 5 (B), a plurality of diffusers 8 are located at a position of 15 to 75 degrees below the horizontal line H about the horizontal axis O of the filtration tank 1 (FIG. 3). 2) are installed. The diffuser 8 uses appropriately selected one or more according to the degree of contamination of the fibrous media 5 and 6 and the driving conditions.

First, the drain valve 16 is opened to drain the filthy water in the filtration chamber 4, and after the drainage is completed, the drain valve 16 is closed. Then, the drain valve 14 and the washing water valve 17 are opened, and the washing water is supplied into the filtration tank 1. When the filtration tank 1 reaches about full water, the stirrer 9 is driven, and the air supply valve 15 is opened to supply air. The fine particles and the like remaining in the fibrous media 5 and 6 are removed by washing the fibrous media 5 and 6 with a swirling flow. The washing drainage is drained from the collecting chamber 3 to the outside through the drain valve 14. After the cleaning and regeneration of the fiber media 5 and 6 are finished, the stirrer 9 is stopped and the air supply valve 15 and the washing water valve 17 are closed. The inflow valve 12 is opened, and raw water is supplied from the raw water pump (not shown) into the filtration chamber 4 to replace the washing waste water remaining in the collection chamber 3 with treated water (water replacement process). Then, when the drain valve 14 is closed and the treated water valve 13 is opened, the water replacement process is completed, and the cleaning and regeneration of the fiber media 5 and 6 are completed. Subsequently, the filtration process is resumed. In addition, in the case where the solid turbidity in the washing drainage is low, and in the case where the specific gravity of the solid is small, the separated solid may be reattached to the fiber media 5 and 6 during the drainage. For this reason, after stirring is complete | finished, a washing | cleaning process may be performed continuously without performing a drainage process.

In addition, in the stirring process, the stirrer 9 can be stopped and the filter medium layer 7 can be stirred by the bubble from the diffuser 8. In this case, the quantity of air used for an acidic radical is 15-25 Nm <3> / m <2> * Hr.

The relationship between the installation position of the diffuser and the stirring effect will be described with reference to Fig. 5B. In this description, the counterclockwise direction is a positive angle with respect to the horizontal axis O with respect to the horizontal line HL on the upper right side of the drawing. As a 1st case, the position of the diffuser was determined in the range A of -15 degrees-+180 degrees with respect to the horizontal line HL in the filtration tank 1. In this case, only the filter medium of the upper part of the diffuser 8 and the stirrer 9 flowed, and the filter medium layer 7 whole did not flow.

As a 2nd case, the position of the diffuser 8 was determined in the range B of +180 degrees-+240 degrees with respect to the horizontal line HL. In this case, the upper portion of the diffuser and the mediar around the stirrer 9 flowed, but the entire medial layer 7 did not flow.

As a 3rd case, the position of the diffuser was determined in the range C of +240 degrees-+285 degrees with respect to the horizontal line HL. In this case, the media of the periphery of the stirrer 9 and the lower part of the media layer flowed but the media of the collection plate 3 near the media layer 7 did not flow. Therefore, the entire media layer did not flow.

As a 4th case, the position of the diffuser was determined in the range (D) of +285 degrees to +345 degrees or -15 degrees to -75 degrees with respect to the horizontal line HL. In this case, the whole medial layer 7 flowed and it traversed the inside of a filtration tank.

From the above result, it is preferable to arrange | position an diffuser in the said range (D).

7 and 8 are perspective views of the floating fiber media 5 and 6 used in the present invention. This fiber media is a nonwoven fiber media composed of synthetic resin fibers having three different fiber diameters. The first filament 5a is a heat-sealable composite fiber in which polyethylene is coated on the core of polypropylene, and its fineness is 18 to 65 denier. The raw material of the 2nd filament 5b is polypropylene fiber, and its fineness is 3-10 denier. The third filament 5c is a heat sealable composite fiber in which polyethylene is coated on a polypropylene core, and its fineness is 1.5 to 6 deniers. The web in which each fiber 5a, 5b, 5c is mixed is made into a woven fabric by the needle punching method, and it heat-processes without smoothing the web raising state of both surfaces, and makes a flat plate, and cuts this flat body. The fibrous filter media 5 is made of a cube or cube having an apparent specific gravity of 0.7 to 0.92, a thickness of 2 to 30 mm, a width of 5 to 30 mm, and a length of 5 to 30 mm. Since the fibrous media 5 consists only of polypropylene fibers, its specific gravity is approximately 0.92.

When adjusting specific gravity to 0.92 or less, as shown in FIG. 8, like the filtrate 6, the foamable resin plate 6a is sandwiched and bonded together between the said plate-shaped objects. As the expandable resin plate 6a, for example, expanded polystyrene having a specific gravity smaller than that of the fiber media 6 is used. Thereby, specific gravity can be arbitrarily adjusted in the range of 0.7-0.92. Moreover, of course, the specific gravity of the fiber media 6 can also be made 0.7 or less by making the specific gravity of the foamable resin plate 6a further smaller. As described above, the optimal fiber media 5 and 6 can be selected according to the raw water properties and the filtration operation method.

9 is a filtration device according to a second embodiment of the present invention. It is for treating raw water including impurities such as stones and fabrics or fiber residues. In this case, when these contaminants and fiber residues are mixed in the filtration tank 1, it may cause the filter medium layer 7 to block early or may damage the stirrer 9. When filtering such raw water, a pretreatment apparatus, such as a vibration damper, is provided in front of a filtration apparatus, and after removing these contaminants and fiber debris by a pretreatment apparatus, a filtration process is performed. 9 shows a filtration device incorporating the vibration damper. When filthy water containing contaminants or fiber debris flows into the filtration tank 1 from the raw water supply pipe 34, large solids such as debris and fiber debris are formed by the cylindrical screen 32 which is installed at the bottom of the filtration tank 1. Is removed. The raw water passing through the screen 32 flows into the filtration chamber 4. The raw water is solid-liquid separated in the filter medium layer 7 and the treated water is discharged from the top of the filtration tank 1 to the outside. Contaminants, fiber debris, etc. captured by the screen 32 are conveyed to the drain outlet 35 by the screw conveyor 33 provided in the screen 32, and discharged to the outside from this drain outlet 35.

The screen conveyor 33 is composed of a screw shaft 33a to which a screw blade 33b is attached and a driver 36. The contaminants, fiber residues, and the like captured by rotating the screw shaft 33a by the driver 36 are continuously transferred from the left to the right in FIG. 9. In FIG. 10, a plurality of raw water supply pipes 34 and a plurality of drain outlets 35 are provided on the screen 32. In the case of raw water in which large amounts of contaminants and fiber debris are mixed, contaminants and fiber debris are concentrated in one place. As a result, when raw water flows into the filtration chamber 4, resistance can be prevented from occurring and raw water can be supplied to the filtration chamber 4 evenly over the entire screen 32. In FIG. 10, the raw water supply pipe 34 is provided in three places, and the drain outlet 35 is provided in two places. The screw blade 33b is divided into four parts and wound on the screw shaft 33a and attached. The screw blade 33b (first) of the left end of FIG. 10 can be conveyed to a right direction. Adjacent screw vanes 33b (second) are transferable in the left direction. The third screw blade 33b is transferable in the same direction as the first, and the third screw blade 33b is transferable in the same direction as the second. The contaminants, fiber debris, etc. introduced from the raw water supply pipe 34 at the left end are transferred to the first (left) drain outlet 35. The contaminants and fiber debris introduced from the central raw water supply pipe 34 are divided into the left and right drain outlets 35 and transferred. Contaminants and fiber debris introduced from the raw water supply pipe 34 at the right end are transferred to the second (right) drain outlet 35 and discharged to the outside. By the above configuration, since large solids such as contaminants and fiber debris do not flow into the filtration chamber 4, it is possible to prevent premature clogging of the filter medium layer 7 and to prevent damage to the stirrer 9.

11A to 11D, the punching metals 50a to 50d used for the collecting plate 22 and the screw 32 in the above-described embodiment will be described.

In Fig. 11A, the punching metal 50a has a stainless sheet 51a and circular holes 52a arranged in parallel with the sheet 50a. The diameter of the hole 52a is 1-3 mm, and is set smaller than the thickness (3 mm) of the fiber which is a media.

In Fig. 11B, the punching metal 50b has circular holes 52b and cross holes 53b disposed in parallel with the sheet 51b. The holes 52b and 53b are alternately arranged.

In Fig. 11C, the punching metal 50c has rectangular holes 52c disposed in parallel with the sheet 51c.

In Fig. 11D, the punching metal 50d has long holes 52d and 53d arranged in parallel to the sheet 51d. The long holes 52d and 53d are inclined opposite to each other.

 The fiber media used in the horizontal high speed filtration apparatus of the present invention has high compression resistance and porosity, and can be adjusted to specific gravity suitable for the properties and processing speed of raw water, and thus it can be applied to raw water in various fields. For example, a large amount of untreated water can be filtered at high speed in rainwater in a combined sewage system, used for precision filtration to perform advanced treatment of industrial water, or in all aspects of purification of aquarium water, circulation filtration of swimming pools and baths. It can be used as a large-capacity filtration treatment device.

Claims (14)

A filtrate layer filled with floating filtrate is formed, raw water is supplied from the bottom of the filtration tank, and the treatment liquid separated from the filter media is taken out from the top of the filtration tank. Gibber sealed hermetic cylindrical filtration tank, A water collecting plate having a plurality of small holes and spread out horizontally on the upper part of the filtration tank, An upper collecting chamber and a lower filtering chamber partitioned by the collecting plate; An air diffuser disposed in the vicinity of one circumferential wall of the lower part of the filtration chamber with respect to the vertical axis of the filtration tank and capable of supplying air bubbles into the raw water such that the raw water flows in a pivoting direction about the horizontal axis of the filtration tank. ), And A stirrer disposed below the bottom of the filter media layer near the other peripheral wall of the lower part of the filtration chamber with respect to the vertical axis of the filtration tank, The stirring blade is arranged in a plurality of positions on the shaft of the stirrer, The stirring blades provided in the vicinity of both side walls are inclined about 45 degrees with respect to the shaft center, and the other stirring blades are installed in parallel with the shaft center, The stirring blades provided near both side walls are operable to flow the raw water along the horizontal axis, The other stirring vane is operable to flow the raw water in the pivot direction, The diffuser and the stirrer are operated synchronously, and the media is turned in the turning direction. Horizontal high speed filtration device using fiber media. The method of claim 1, The fiber media is a nonwoven fiber media composed of three kinds of synthetic resin fibers of different fiber diameters, A first filament having a polypropylene core coated with polyethylene on a heat-sealable composite fiber and having a fineness of 18 to 65 denier, A second filament having a polypropylene fiber and having a fineness of 3 to 10 denier, A heat-sealable composite fiber coated with polyethylene on a polypropylene core and comprising a third filament having a fineness of 1.5 to 6 deniers, The fibrous media is a web formed by blending each of the fibers into a cloth shape by needle punching, and heated by flattening the web on both sides without smoothing the state of raising the web. The upper body was made, and the plate was cut. The cut fibrous media is a cube or cube having an apparent specific gravity of 0.7 to 0.92, a thickness of 3 to 30 mm, a width of 5 to 30 mm, and a length of 5 to 30 mm, The fibrous media is characterized in that the apparent specific gravity is adjusted to 0.92 or less by sandwiching and cutting the foamable resin plate sandwiched between the plate-like body. Horizontal high speed filtration device using fiber media. The method according to claim 1 or 2, One end of the shaft is connected to the driver through the side wall of the filter tank Horizontal high speed filtration device using fiber media. The method according to claim 1 or 2, At least one diffuser is installed at a position of 15 to 75 degrees downward from the horizontal axis of the filtration tank. Horizontal high speed filtration device using fiber media. The method according to claim 1 or 2, When stirring the said media layer together using a stirrer and an diffuser, the quantity of the air used for an acidic radical is 10-20 Nm <3> / m <2> * Hr characterized by the above-mentioned. Horizontal high speed filtration device using fiber media. The method according to claim 1 or 2, When the stirrer is stopped and the medial layer is stirred by an diffuser, the amount of air used in the diffuser is 15 to 25 Nm 3 / m 2 · Hr. Horizontal high speed filtration device using fiber media. The method of claim 1, A cylindrical screen which is installed at the bottom of the filtration tank and has one end to which a raw water supply pipe is connected and the other end to which a drain outlet is opened; and And a screw conveyor installed inside the screen. Horizontal high speed filtration device using fiber media. The method according to claim 1 or 7, A plurality of raw water supply pipes and a plurality of drain outlets are provided at the bottom of the screen; Horizontal high speed filtration device using fiber media. delete delete delete delete delete delete

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