JPH11226310A - Filtration apparatus employing fibrous filtration medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out an efficient regeneration treatment for a fibrous filtration medium and to lower maintenance cost. SOLUTION: This filtration apparatus employing a fibrous filtration medium 37 is provided with a filtration tank 2 for filtering water to be treated by introducing the water through a water intake 21a and then discharging the water out of a long water discharge outlet 22a and a plurality of strings of the fibrous filtration medium 37 installed in the filtration tank 2. The filtration apparatus is further provided with filtration material hanging members 31 for hanging the strings of the fibrous filtration material 37 and which are installed in the filtration tank 2 in an up and down movable manner and an elevating means 5 for moving the filtration medium hanging members up and down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration device using a so-called fiber filter medium, which is composed of an aggregate of long fibers as a filler for filtration.

[0002]

2. Description of the Related Art Conventionally, there has been known a filtration apparatus using a fiber filter medium disclosed in Japanese Utility Model Laid-Open Publication No. 8-126804. In this filtration device, a filter medium support plate made of a perforated plate is arranged at a lower portion in the filter tank so as to cross the inside of the tank, and a plurality of fiber filter media made of aggregates of fibers are planted on the upper surface of the filter medium support plate. It is set up. A float is attached to the tip of each fiber filter medium, and a filter medium suppression plate consisting of a perforated plate is provided in the tank so as to sandwich the fiber filter medium with the filter medium support plate. Have been. The filter medium holding plate can be moved up and down by a predetermined elevating means, and when the water to be treated is supplied in a downward flow into the filtration tank, the filter medium holding plate is lowered to suppress the float that has floated. ing. By doing so, even if the water to be treated flows downward in the filtration tank, as long as the water to be treated is full in the tank, the float is in contact with the lower surface of the filter medium holding plate. No inconvenience such as entanglement of the fiber filter media occurs.

[0003] Then, at the time of so-called regeneration processing for removing contaminants attached to the fiber filter medium, the filter medium holding plate is raised so as not to come into contact with the float, and then water for regeneration is supplied into the tank in an upward flow. It has been made. By doing so, the fiber filter medium rises while oscillating in the upward flow due to the buoyancy of the float, and at this time, contaminants adhering to the fiber filter medium are removed and regenerated.

[0004]

By the way, in the conventional filtering apparatus using the above-mentioned fiber filter medium, since the float is provided at the tip of the fiber filter medium, even when the flow is in a downward flow, it is difficult to reduce the flow rate. Even if the filter media holding plate is lowered, the flow rate is small and the lower part of the filter media holding plate in the tank is not full. However, there is a problem in that adjacent fiber filter media are entangled with each other, or the fiber filter media is pushed into a part of the tank to form a short-circuited flow path of the water to be treated, thereby causing a disadvantage that the treatment efficiency is reduced. have.

[0005] Even when the fiber filter medium is made to flow upward in order to regenerate the fiber filter medium, it takes a long time until the reclaimed water is filled in the tank.
Since the float is freely floating on the water surface, at this time, the adjacent fiber filter media may be entangled with each other, and there is a problem that a troublesome maintenance work is required to solve the problem. .

[0006] Further, a float must be attached to each of the fiber filter media, which causes a problem that the material cost increases.

[0007] In addition, since the regeneration treatment of the fiber filter medium is performed only by bringing the fiber filter medium into contact with water for regeneration, there is a problem that the regeneration efficiency is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is intended to reduce the material cost and to make the fiber filter media entangled with each other regardless of the upward flow and the downward flow. Accordingly, it is an object of the present invention to provide a filtration device using a fiber filter medium that can reduce the maintenance cost and that can perform an efficient regeneration process on the fiber filter medium.

[0009]

According to a first aspect of the present invention, there is provided a filtration apparatus using a fiber filter medium, wherein water to be treated is introduced through one of an upper opening and a lower opening to perform a filtration treatment. A filter device using a fiber filter medium comprising a filter tank discharged from the other side and a plurality of string-shaped fiber filter materials loaded in the filter tank, wherein the fiber filter medium is suspended in the filter tank. And a lifting means for raising and lowering the filter medium suspending member.

According to the filtering device using the fiber filter,
For example, by lowering the filter medium suspending member by driving the lifting / lowering means, the fiber filter medium is sandwiched between the filter medium suspending member and the bottom of the filtration tank. Then, by appropriately adjusting the descending amount of the filter medium suspending member, the fiber filter medium sandwiched between them becomes a state suitable for filtering and removing contaminants in the water to be treated. In this state, the water to be treated is introduced into the filtration tank from one of the upper and lower openings and discharged from the other, so that the water to be treated becomes treated water from which contaminants have been removed, and from the other opening. Is discharged.

When regenerating a fiber filter,
By driving the lifting / lowering means, the filter medium suspending member is raised, and the fiber filter medium is once suspended in the filter tank. In this state, water for regeneration is supplied to the fiber filter medium from above, or the filter medium is cleaned. The so-called rinsing treatment is performed by raising and lowering the fiber filter medium in the filtered water, so that the contaminants are first washed out, and then the filter medium suspension member is lowered as low as possible by driving the lifting / lowering means, thereby suspending the fiber medium. By pressing and holding between the holding member and the bottom of the filtration tank, the fiber filter medium is in a so-called squeezed state, and the held water is squeezed out. Since contaminants accompany the squeezed water, the fiber filter medium is effectively regenerated.

As described above, the fiber filter medium is suspended from the filter medium suspending member, so that it is not necessary to attach a float to each fiber filter medium one by one as in the related art, which contributes to a reduction in material cost. In addition, there is no inconvenience such that the fiber filter materials raised by the float are entangled with each other, so that it is not necessary to perform a troublesome work of unraveling the entangled fiber filter materials, thereby reducing the maintenance cost. .

According to a second aspect of the present invention, there is provided a filtration apparatus using a fiber filter medium according to the first aspect, wherein the filter medium suspension member suspends the plurality of fiber filter mediums. Characterized in that a plurality of hanging rods are provided side by side.

According to the filtering device using the fiber filter,
By arranging a plurality of suspension rods at a predetermined pitch and connecting them with an appropriate bridge member, the filter medium suspension member can be easily and inexpensively formed, which can contribute to a reduction in equipment cost. In addition, the fiber filter medium is suspended by the filter medium suspension member by a simple operation of suspending the fiber filter medium on a suspension rod and fastening it by binding or the like, which can contribute to a reduction in operation cost.

According to a third aspect of the present invention, there is provided a filtration apparatus using the fiber filter medium according to the first or second aspect, wherein the elevating means includes a vertically extending lower end at the lower end. A spiral rod for supporting the suspension member,
It is characterized by comprising a nut member screwed to the spiral rod, and nut rotating means for rotating the nut member in a state where the vertical movement is restricted.

According to the filtering device using the fiber filter,
By rotating the nut member by driving the nut rotating means, the spiral rod screwed to the nut member moves up and down, whereby the filter medium suspending member moves up and down. Then, by making the screw pitch of the spiral rod and the nut member as small as possible, it is possible to increase the force of the spiral rod to move up and down with respect to the force of rotating the nut member. The pressing force of the filter medium suspending member against the filter medium can be made larger than when the pinion and the rack are used, and the squeezing efficiency of the fiber filter medium is improved.

According to a fourth aspect of the present invention, there is provided a filtration apparatus using a fiber filter medium according to any one of the first to third aspects, wherein the fiber filter medium has biodegradability. Characterized by the fact that it is formed of woven fibers.

According to the filtering device using the fiber filtering material,
When the fiber filter medium is deteriorated and is replaced with a new one, the replaced old fiber filter medium is decomposed by microorganisms even when discarded, which is convenient for environmental protection.

[0019]

FIG. 1 is a sectional view showing an embodiment of an application of a filtration device according to the present invention. As shown in this figure, the filtration device 1 is provided in a shaft H excavated beside a bank of a water channel R such as a river. The filtering device 1 is formed by twisting a large number of fibers inside, and has a string-shaped fiber filtering material 37 described later in detail. The treated water supplied into the filtering device 1 37, a filtering process is performed.

A water intake pit P is provided in the embankment on the shaft H side of the water channel R, and a water intake pump 101 is provided in the water intake pit P.
A water intake pipe 102 is provided between the filter device 1 and the bottom of the filter device 1. The intake pipe 102 is provided with a solenoid valve 103 which is normally opened and closed only when a power failure occurs, whereby untreated water to be treated in the filtration device 1 flows back to the water channel R at the time of a power failure. Is prevented from doing so. Further, an on-off valve 103 is provided on the water intake pipe 102 on the downstream side of the solenoid valve 103.
a is provided.

The water to be treated supplied to the bottom of the filtration device 1 through the water intake pipe 102 is subjected to a predetermined filtration treatment in the filtration device 1, and then turned into clean treated water to be filtered. 1 is discharged from the upper part. A treated water pit 104 adjacent to the filtering device 1 is provided on the right side of the filtering device 1, and a water discharge pump 105 is provided in the treated water pit 104 to discharge water from an upper portion of the filtering device 1. The treated water is temporarily stored in the treated water pit 104 and then returned to the water channel R through the return pipe 106 by driving the water discharge pump 105.

A drain pit 1 is located to the left of the filtration device 1.
07 is provided, and a first drain pipe 108 having an open / close valve 109 is disposed between the drain pit 107 and the bottom of the filtration device 1.
7 during regeneration of the first drain pipe 108
Through the drain pit 107. The drain pit 107 is provided with a drain pump 110. This drain pump 110 is used for the drain pit 1
07 is driven in a state where the water level is equal to or higher than a predetermined water level, whereby the washed water that has washed the fiber filter medium 37 in the drain pit 107 is drawn out to the predetermined sewer through the second drain pipe 111. It has become.

FIG. 2 is a partially cutaway perspective view showing one embodiment of the filtration device 1 according to the present invention. In FIG. 2, the XX direction is referred to as the width direction, the YY direction is referred to as the front-back direction, and in particular, the -X direction is referred to as left, the + X direction is referred to right, the -Y direction is referred to as front, and the + Y direction is referred to as rear. 3 to 5 are cross-sectional views thereof. FIG. 3 shows a state where the filter medium suspending member 31 is raised, and FIG. 4 shows a state where the filter medium suspending member 31 is set at a substantially intermediate position in the vertical direction. FIG. 5 shows a state in which the filter layer is formed by 37, and FIG. 5 shows a state in which the filter medium suspending member 31 is lowered to the lowermost position and the fiber filter medium 37 is squeezed.

As shown in these figures, the filtration device 1
A rectangular parallelepiped filter tank 2, a filter structure 3 provided in the filter tank 2, and a lid 4 for closing an upper opening of the filter tank 2.
And a lifting and lowering means 5 attached to the lid 4 for raising and lowering the filtration structure 3.

In the present embodiment, the filtration tank 2 is
It is made of reinforced concrete and formed in a square shape, and the front wall 2 in front
1, a rear wall 22, a pair of side walls 23 in the width direction, and a bottom wall 24 covering the bottom. In the lower part of the front wall 21, a water intake 21 a to which the downstream end opening of the water intake pipe 102 is connected is bored, and in the upper part of the rear wall 22, treated water is led out toward the treated water pit 104. Elongate drain port 22a is provided in the width direction for this purpose.

The bottom wall 24 is formed with a gentle downward slope toward the front, and a drain port formed at the lowest position of the slope so as to face the opening of the first drain pipe 108. 24a is provided. The drain port 24a is for discharging treated water when the fiber filter medium 37 of the filter structure 3 is regenerated.

At the lower part in the filtration tank 2, a plate 25 for vertically dividing the inside of the filtration tank 2 is provided so as to extend in the horizontal direction. A plurality of water passage holes 25a are formed in the perforated board 25 in the vertical and horizontal directions at the same pitch, and treated water used for regeneration when the fiber filter medium 37 is regenerated is treated with the water passage holes 25a. Through to the lower part of the eyeboard 25. A plurality of beam members 2 are provided on the lower surface of the eye plate 25.
5b are arranged at a predetermined pitch, thereby making the eye panel 25 structurally strong.

The filter structure 3 includes a filter material suspension member 31 having a squash shape and a plurality of fiber filter media 37 suspended by the filter material suspension member 31. The filter medium suspending member 31 has a T-shape in end view, and a plurality of T-shaped members (suspending rods) 32 arranged at equal pitches in the front-rear direction so as to extend in the width direction. It comprises a filter medium holder 33 (FIG. 6) attached to the T-shaped member 32 and a plurality of long connecting plates 34 extending in the front-rear direction for connecting the respective T-shaped members 32.

The T-shaped member 32 is composed of a horizontal portion 32a and a vertical portion 32b integrally provided at the center of the lower surface of the horizontal portion 32a so as to extend in the longitudinal direction. The filter medium holder 33 is fixed to both surfaces of the vertical portion 32b by welding or the like while being fixed to the upper surface side of 32a by welding or the like.

The connecting plate 34 at the center in the width direction (center connecting plate 35) is formed wider and sturdier than the others, and the center of the center connecting plate 35 in the front-rear direction and the width direction is formed. A part (a spiral rod 53 to be described later) of the elevating means 5 is connected to a portion (that is, an upper portion of the center of gravity of the filter medium suspending member 31).

FIG. 6 is a partially enlarged perspective view of the filter medium suspending member 31, and FIG. 7 is a developed view of the filter medium holder 33. As shown in FIG. 7, the filter medium holder 33 shown in FIG.
A punched plate 36 formed by pressing a metal flat plate and punching
Is formed by bending a predetermined portion of the sheet.

The punching plate 36 has a long portion 36a having the same length as the T-shaped member 32, and a long edge 36a extending from one side edge of the long portion 36a (below the sheet of FIG. 7). 36a
A plurality of pairs of first protrusions 36b projecting in a direction perpendicular to
And a plurality of second ridges 36c protruding from the other side edge (upper side of the paper surface of FIG. 6) corresponding to each of the pair of first ridges 36b. The first protrusion 36b
Is bent in the state shown in FIG. 7 in the state shown in FIG.
The punched plate 36 is formed by bending the second ridge 36c so as to be parallel to the first ridge 36b.

The punching plate 36 is mounted on the T-shaped member 32 by fixing the back side of the long portion 36a to the front and back of the vertical portion 32b of the T-shaped member 32 by welding or the like. The mounting posture of the punching plate 36 is set such that the tip ends of the first and second ridges 36b and 36c are raised when the punching plate 36 is fixed to the T-shaped member 32.

In the present embodiment, the second ridge 3
6c is provided at the end of the long portion 36a from the pair of first protrusions 36b.
The other second ridges 36c are provided so as to be located between the pair of first ridges 36b. The first and second ridges 36b and 36c at the ends are shown in FIG.
As shown in (2), after the bent portion of the two-folded fiber filter medium 37 is locked by the inner first ridge 36b, the upper two-fold fiber filter medium 37 is wrapped around the second ridge 36c. The lower fiber filter material 37 is the outer first protrusion 36b.
In a state of being hung on the punching plate 36. The second ridge 36c other than the end is provided between the pair of first ridges 36b, and the fiber filter medium 37 is locked by bending the bent portion of the fiber filter medium 37 into the second protrusion 36c. After that, they are bundled and hung downward through the first protrusions 36b.

FIG. 8 is a partially cutaway perspective view showing an embodiment of the fiber filter medium 37. As shown in this figure, the fiber filter medium 37 is composed of a core string 37a and a number of loop yarns 37b formed in a loop around the outer peripheral surface of the core string 37a. The core string 37a has, as a core material, a filament bundle 37c formed by bundling a plurality of filaments made of synthetic resin at the center.

The outer peripheral surface of the filament bundle 37c is surrounded by an annular net 37e formed by weaving a power yarn 37d. Any one of the force yarns 37d of the annular net 37e
The core string 37a is formed by spirally weaving the loop thread 37b along the power thread 37d in one or more books. Therefore, the fiber filter medium 37 has a state in which a large number of minute gaps capable of holding foreign matter in the water to be treated are formed between the dense loop yarns 37b, thereby making it an excellent filter material. .

At both ends of the fiber filter material 37, a loop yarn 37b is squeezed, and an adhesive tape 37f made of a synthetic resin is wound around the outer periphery thereof.
At the end of the thread is not frayed.

In this embodiment, the fiber filter medium 37 includes a loop yarn 37b and a filament bundle 37c.
All of them, including the power yarn 37d, are formed of so-called biodegradable fibers that are decomposed by microorganisms, so that disposal of the used fiber filter medium 37 does not cause a problem in environmental conservation. I have to.

Examples of the biodegradable fibers include starch fibers, cellulose fibers, polyester fibers, polyvinyl alcohol fibers, and polyether fibers.

FIG. 9 is a sectional view showing an embodiment of the lifting / lowering means 5. As shown in FIG. As shown in FIG. 9, the lifting / lowering means 5 includes a lid 4
A casing 51 provided at a central portion of the casing 51, a nut gear (nut member) 52 provided in the casing 51,
Nut gear 52 penetrating through casing 51 and lid 4
A lifting gear 54 for rotating the nut gear 52 around the spiral rod 53, and a driving gear 55 mounted on a drive shaft 54 a of the lifting motor 54 and meshing with the nut gear 52. It is comprised including. A nut gear 52, a drive gear 55 meshing with the nut gear 52, and a drive gear 55
The nut rotating means of the present invention is formed by the lifting motor 54 for driving the nut.

The casing 51 is provided at the center of the upper surface of the lid 4 and includes a casing body 51a in the shape of a circular cup-shaped bowl in plan view, and a bottom plate 51b provided on the lower surface of the casing body 51a. Consists of A flange 51c is provided on a lower peripheral edge of the casing body 51a so as to protrude annularly in the radial direction. The diameter of the flange 51c and the diameter of the bottom plate 51b are set to be the same, and the bolt B is inserted through the flange 51c, the bottom plate 51b and the lid 4 in a state where the flange 51c is overlaid on the bottom plate 51b. The casing 51 is fixed to the lid 4 by being fastened with the nut N.

On the other hand, a fitting hole 41 is provided at the center of the lid 4.
And the casing body 51a
In the top plate and the bottom plate 51b, fitting holes 51d and 51e of the same diameter facing the above-described fitting hole 41 are drilled upward, and a spiral rod 53 is fitted in these fitting holes 41, 51d and 51e. Is equipped.

The spiral rod 53 is provided with a right-handed helical thread on the outer peripheral surface of the rod-shaped body over the entire length thereof, while a spiral groove which is screwed to the helical thread is provided in a central portion of the nut gear 52. The fitting holes 41, 51 d, 51 are provided in a state where the nut gear 52 is housed in the casing 51.
e, by inserting the spiral rod 53 into the spiral groove and screwing the spiral strip into the spiral groove.
Is attached to the lid 4.

The elevating motor 54 is mounted on the upper surface of the casing body 51a with the drive shaft 54a protruding downward. The drive shaft 54a penetrates through a top plate of the casing body 51a in a sliding state and is introduced into the casing 51, and a lower end portion thereof is a bottom plate 51b of the casing 51.
And is rotatably supported around its own axis. The drive gear 55 is concentrically fixed to the drive shaft 54a.
The drive gear 55 is meshed with the nut gear 52,
The rotation of the drive gear 55 caused by the forward / reverse drive of the lifting / lowering motor 54 causes the nut gear 52 meshed with the drive gear 55 to rotate forward / reverse, whereby the spiral rod 53 screwed to the nut gear 52 moves up and down. ing.

Thrust bearings 56 are provided between the upper surface of the bottom plate 51b of the casing 51 and the lower surface of the nut gear 52, and between the upper surface of the nut gear 52 and the lower surface of the top plate of the casing body 51a. The rotation of the film holding member 52 around the spiral rod 53 is smoothly performed by the thrust bearing 56.

The lower end of the spiral rod 53 is integrally connected to a central connecting plate 35 via a washer 53a, and the central connecting plate 35 is connected to the filter medium suspending member 31 by bolts B and nuts N. , Whereby the filter structure 3 is suspended from the tip of the spiral rod 53.

According to the above structure of the lifting / lowering means 5, when the driving shaft 54a is rotated clockwise in plan view by driving the lifting / lowering motor 54, this rotation is transmitted to the nut gear 52 via the driving gear 55, The gear 52 rotates counterclockwise. By this rotation, the spiral rod 53 with a right-hand thread screwed into the nut gear 52 is lowered, whereby the filtration structure 3 is lowered as shown in FIGS. 4 and 5. Conversely, by rotating the drive shaft 54a counterclockwise, the nut gear 52 rotates clockwise, and this rotation raises the spiral rod 53.

The operation of the present invention will be described below with reference to FIGS. FIG. 10 and FIG. 11 are explanatory views for explaining the operation of the present invention, and FIG.
10 shows a state in which the filtration apparatus 1 is operating, FIG. 10B shows a state in which the filtration apparatus 1 is stopped, and FIG. 10C shows a state in which the fiber filter medium 37 is being washed in the stopped filtration apparatus 1. Are respectively shown. FIG. 11A shows a state in which the water in the filtration device 1 is being drained after the washing of the fiber filter medium 37 is completed, and FIG. 11B shows a state in which the fiber filter medium 37 is squeezed. 11 (c) shows a state in which the inner wall surface of the filtration tank 2 is cleaned.

First, in the state shown in FIG. 10 (a), the filter medium suspending member 31 is lowered by the lowering of the spiral rod 53 driven by the lifting / lowering means 5, and as a result, as shown in FIG. 37 is sandwiched between the eye panel 25 and the filter medium suspending member 31. The distance between the filter medium suspending member 31 and the eye plate 25 is such that the pressure loss of the fiber filter medium 37 sandwiched therebetween does not become excessive and the flow of the water to be treated is easily performed. It is set as follows. Then, the filter medium suspending member 31
Form a filtration layer.

In such a state, the water to be treated is
2 into the filtration tank 2. The water to be treated is once introduced into the lower part of the mesh plate 25 in the filtration tank 2, passes through the water hole 25 a of the mesh plate 25, and is compressed and sandwiched by the mesh plate 25 and the filter material suspending member 31. And the contaminants in the water to be treated are removed by the filtration layer, and the treated water becomes clean treated water.
It is led out from 2a toward the treated water pit 104.

When the operation of the filtration device 1 is stopped, the operation of the water intake pump 101 is stopped and the on-off valve 10 is opened.
3a is closed. By doing so, as shown in (b) of FIG. 10, the water to be treated is not supplied into the filtration tank 2, and thus, the treatment water is stored in the filtration tank 2.

When the fiber filter medium 37 is regenerated, the lifting means 5 is moved in the state shown in FIG.
The lifting / lowering of the spiral rod 53 by the forward / reverse driving of the filter medium raises / lowers the filter medium suspending member 31, and at the time of raising / lowering, the fiber filter medium 37 suspended by the filter medium suspending member 31 is washed in the treatment water, and the fiber filter medium 37 is held. The contaminants that have migrated into the treated water, whereby the fiber filter medium 37 is cleaned.

When the predetermined number of lifting and lowering operations of the filter medium suspending member 31 are completed, the opening / closing valve 109 is opened with the filter medium suspending member 31 raised to the highest position as shown in FIG. The water in the filtration tank 2 that is valved and contaminated with contaminants is led out to the drain pit 107 through the first drain pipe 108. Then, in a state where the entire amount of water in the filtration tank 2 has been discharged, as shown in (b) of FIG.
Is further lowered, whereby the fiber filter medium 37 sandwiched between the filter medium suspending member 31 and the eye plate 25 is squeezed (see FIG. 6), and the dirty water absorbed by the fiber medium 37 is squeezed out.

When the squeezing operation is completed, the filter medium suspending member 31 is moved up and down by driving the elevating means 5, and the inner wall surface of the filter tank 2 is cleaned by the sliding operation of the fiber filter medium 37 against the inner wall surface of the filter tank 2 by this elevating. Be transformed into When the inner wall surface cleaning process is completed, the opening and closing valve 109 of the first drain pipe 108 is opened.
Is closed, and the filter medium suspending member 31 is lowered by the driving of the lifting / lowering means 5, and the filter device 1 shown in FIG. 10A is set in an operable state, and the on-off valve 103a is opened. The filtration device 1 is driven by the driving of the water intake pump 101 in the step (1).

According to the present invention, as described in detail above, the filtration device 1 is provided with a fiber filter material 37 provided in the filtration tank 2 so as to be movable up and down.
And a filter medium suspending member 31 for suspending the filter medium.
The filter medium suspending member 31 is lowered by driving the elevating means 5, so that the fibrous filter medium 37 is removed from the filter medium suspending member 31 and the filter tank 2.
It can be in a state of being sandwiched between the bottom part. Then, by appropriately adjusting the descending amount of the filter medium suspending member 31, the fiber filter medium 37 sandwiched therebetween can be brought into a state suitable for filtering and removing contaminants in the water to be treated. In this state, the water to be treated is introduced into the filtration tank 2 from the water intake pipe 102, and the treated water from which the pollutants have been removed can be discharged from the drain port 22a.

When the fiber filter medium 37 is to be regenerated, the filter medium suspending member 31 is raised by driving the lifting / lowering means 5.
In a state where the fiber filter medium 37 is suspended in the filtration tank 2 once,
In this state, the fiber filter medium suspending member 31 is moved up and down to rinse contaminants by rinsing the fiber filter medium 37 in the treated water, and then the filter medium suspending member 31 is lowered as low as possible by driving the lifting means 5. This allows the fiber filter medium 37 to be in a state of being squeezed between the filter medium suspending member 31 and the bottom of the filtration tank 2, thereby squeezing out the dirty water held by the fiber filter medium 37. Since contaminants are entrained in the squeezed water, the fiber filter material 37
Can be more effectively performed.

As described above, since the fiber filter medium 37 is suspended from the filter medium suspending member 31, it is not necessary to attach a float to each of the fiber filter mediums 37 as in the related art, and the material cost is reduced accordingly. The fiber filter medium 37 which can contribute to the
However, there is no need to perform a troublesome work of unraveling the entangled fiber filter media 37, and the maintenance cost can be reduced accordingly.

The present invention is not limited to the above embodiment, but includes the following contents.

(1) In the above embodiment, the filter tank 2 has a rectangular shape in plan view. However, the present invention is not limited to the filter tank having a rectangular shape, and is not limited to a rectangular shape. Or an elliptical shape. In this case, it is preferable that the shape of the filter medium suspending member 31 be set to a circular or elliptical shape so that the peripheral portion thereof is in sliding contact with the inner wall surface of the filter tank.

(2) In the above embodiment, the fiber filter medium 37 is formed by spirally implanting the loop thread 37b on the outer peripheral surface of the core string 37a. However, the present invention is not limited to such a structure, and may be an ordinary cord, or a belt-like body made of a cloth product may be adopted as the fiber filter material. Further, instead of using a material provided with a biodegradable fiber filter material 37, a material made of a normal material may be employed.

(3) In the above embodiment, the fiber filter medium 3 held between the filter medium suspending member 31 and the eye plate 25
Although the to-be-treated water is supplied to the fiber filter medium 37 in the upward flow, the to-be-treated water may be supplied to the fiber filter medium 37 in the downward flow instead.

(4) In the above embodiment, the elevating means 5 is provided with the spiral rod 53, but a rod having a rack is used instead of the spiral rod 53, and a pinion is attached to the rack of this rod. And the filter structure may be moved up and down by rotating the pinion forward and reverse by the driving means.

[0063]

According to the filter device using the fiber filter medium according to the first aspect of the present invention, a filter medium suspension member for suspending the fiber filter medium provided in the filtration tank so as to be able to move up and down, and the filter medium suspension apparatus Since the elevating means for raising and lowering the member is provided, for example, by lowering the filter medium suspending member by driving the elevating means, the fiber filter medium can be held between the filter medium suspending member and the bottom of the filtration tank. it can. Then, by appropriately adjusting the descending amount of the filter medium suspending member, the fiber filter medium sandwiched therebetween can be brought into a state suitable for filtering and removing contaminants in the water to be treated. In this state, the water to be treated can be introduced into the filtration tank from one of the upper and lower openings, and the treated water from which the contaminants in the water to be treated have been removed can be discharged from the other opening.

When regenerating the fiber filter medium,
By driving the lifting / lowering means, the filter medium suspending member is raised, and the fiber filter medium is once suspended in the filter tank. In this state, water for regeneration is supplied to the fiber filter medium from above, or the filter medium is cleaned. The fiber filter medium is lifted and lowered in the filtered water, so-called rinsing treatment is first performed to wash off the contaminants, and then the filter medium suspension member is lowered as low as possible by the drive of the lifting / lowering means, whereby the fiber filter medium is removed from the filter medium suspension member. By pressing and holding the filter medium between the filter and the bottom of the filtration tank, the fiber filter medium can be in a so-called squeezed state, whereby the retained water can be squeezed out. Since contaminants accompany the squeezed water, the fiber filter can be more effectively regenerated.

As described above, since the fiber filter medium is hung on the filter medium suspending member, it is not necessary to attach a float to each fiber filter medium one by one as in the related art, which contributes to a reduction in material cost. In addition, there is no inconvenience such that the fiber filter media raised by the float are entangled with each other, and therefore, it is not necessary to perform a troublesome work of unraveling the entangled fiber filter media, thereby realizing a reduction in maintenance cost. be able to.

According to the filtering device using the fiber filter medium according to the second aspect of the present invention, a plurality of suspension rods for suspending a plurality of fiber filter media are used as the filter medium suspension member. Therefore, by attaching a plurality of suspension rods at a predetermined pitch and connecting them with an appropriate bridge member, the filter medium suspension member can be easily and inexpensively formed, contributing to a reduction in equipment cost. be able to. In addition, fiber filter media
It can be hung by the filter medium hanging member by a simple operation of hanging it on a hanging rod and fastening it by binding or the like, which can contribute to a reduction in working cost.

According to the filtering device using the fiber filter medium of the third aspect of the present invention, the elevating means is screwed to the spiral rod supporting the hanging member at the lower end extending vertically and supporting the hanging member. Formed by the nut member to be rotated and the nut rotating means for rotating the nut member in a state where the vertical movement is restricted, the spiral screwed to the nut member by rotating the nut member by driving the nut rotating means The rod is moved up and down, so that the filter medium suspending member can be moved up and down. Then, by making the screw pitch of the spiral rod and the nut member as small as possible, it is possible to increase the force of the spiral rod to move up and down with respect to the force of rotating the nut member. The pressing force of the filter medium suspending member on the filter medium can be made larger than when the pinion and the rack are used, and the squeezing efficiency of the fiber filter medium can be improved.

According to the filtration device using the fiber filter medium according to the fourth aspect of the present invention, since the fiber filter medium is made of biodegradable fiber, the fiber filter medium is deteriorated and replaced when it is replaced with a new one. Even old fiber filter media is decomposed by microorganisms even when discarded, which is effective in preserving the environment.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of application of a filtration device according to the present invention.

FIG. 2 is a partially cutaway perspective view showing an embodiment of the filtration device according to the present invention.

FIG. 3 is a cross-sectional view of the filtration device shown in FIG. 2, showing a state where a filter medium suspending member is raised.

FIG. 4 is a cross-sectional view of the filtration device shown in FIG. 2, showing a state where a filter medium suspending member is set at a substantially middle position in a vertical direction and a filtration layer is formed by a fiber filter medium.

FIG. 5 is a cross-sectional view of the filtration device shown in FIG. 2, showing a state where the filter medium suspending member is lowered to the lowest position and the fiber filter medium is squeezed.

FIG. 6 is a partially enlarged perspective view of a filter medium suspending member.

FIG. 7 is a development view of a filter medium holder.

FIG. 8 is a partially cutaway perspective view showing one embodiment of a fiber filter medium.

FIG. 9 is a cross-sectional view showing one embodiment of the elevating means.

10A and 10B are explanatory diagrams for explaining the operation of the present invention. FIG. 10A shows a state in which the filtration device is operating, FIG. 10B shows a state in which the filtration device is stopped, and FIG. The state where the fiber filter medium is washed in the filter device is shown.

11A and 11B are explanatory diagrams for explaining the operation of the present invention. FIG. 11A shows a state in which water in the filtration device is being drained after washing of the fiber filter medium is completed, and FIG. (C) shows a state where the inner wall surface of the filtration tank is being cleaned.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration apparatus 2 Filtration tank 21 Front wall 21a Intake port 22 Rear wall 22a Drain port 23 Side wall 24 Bottom wall 24a Drain port 25 Face plate 25a Water passage hole 25b Beam 3 Filtration structure 31 Filter material suspension member 32 T-shaped member 32a Horizontal Part 32b Vertical part 33 Filter medium holder 34 Connecting plate 35 Central connecting plate 36 Punching plate 37 Fiber filter medium 36a Long part 36b First ridge 36c Second ridge 37 Fiber filter medium 37a Core string 37b Loop thread 37c Filament bundle 37d Power thread 37f Adhesive tape 4 Lid 41 Fitting hole 5 Lifting means 51 Casing 51a Casing body 51b Bottom plate 51c Flange 51d, 51e Fitting hole 52 Nut gear (nut member) 53 Spiral rod 53a Washer 54 Lifting motor 54a Drive shaft 55 Drive gear 56 Thrust bearing 101 Intake pump 1 02 Intake piping 103 Solenoid valve 103a Open / close valve 104 Treated water pit 105 Water discharge pump 106 Return pipe 107 Drain pit 108 First drain pipe 109 Open / close valve

Claims (4)

[Claims] 1. A filtration tank for introducing and filtering water to be treated through one of an upper opening and a lower opening, and discharging treated water from the other, and a plurality of cords to be loaded in the filtration tank. A filter device using a fiber filter medium comprising: a filter medium suspending member for suspending the fiber filter medium in a filtration tank, and elevating means for elevating the filter medium suspending member. A filtration device using a fiber filter medium. 2. A filtering device using a fiber filter medium according to claim 1, wherein the filter medium suspending member includes a plurality of hanging rods for suspending the plurality of fiber filter media. A filtering device using a fiber filter material. 3. The filtering device according to claim 1, wherein the lifting means includes a spiral rod supporting the hanging member at a lower end extending vertically, and a spiral rod connected to the spiral rod. A nut member to be worn;
And a nut rotating means for rotating the nut member in a state where the vertical movement thereof is regulated. 4. The filtering device using the fiber filter according to claim 1, wherein the fiber filter is formed of biodegradable fibers. Filtration equipment used.