JP3177883B2 - Filtration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration device having a function of self-cleaning a filtration net and preventing adhesion of algae and the like when a drum rotates.

[0002]

2. Description of the Related Art Heretofore, as this type of filtration device, a device for washing a filter medium by jetting washing water to the surface of a filter layer, and for supplying air and stirring with backwash water from the bottom of a filter bed to stir the air. There is a device for washing the filter medium. However, the conventional ones have drawbacks such as insufficient washing of the filter medium, a large amount of washing water and time required for washing the filter medium, and complicated and large-sized devices.

In view of the above-mentioned circumstances, the present inventors have proposed a filtering device capable of sufficiently cleaning the filter medium in advance, simplifying and reducing the size, and improving the filtering capacity. (See Japanese Patent Publication No. 61-41246).
In this filtration device, a filter tank made of granular filter material and a space portion are formed in the vertical direction inside, and a rotatable horizontal drum is supported. A first flow pipe for raw water inflow and sewage discharge in which a first flow section for raw water inflow and sewage discharge is located in the space; and a drainage inflow and washing through the axial center portion of the horizontal drum from outside the drum. The second outflow section for water outflow has a second outflow pipe for inflow of filtrate and outflow of washing water located in the filter tank.

[0004] The second flowing water section of the second flowing water pipe is provided with the second flowing water pipe.
The portion provided with the flowing water port is covered with the filter net, and a sliding member that slides on the inner surface of the filter net when the filter medium is washed is formed with the filter net interposed between the filter net and the portion. This sliding contact member is formed by a spiral linear member wound around a portion where the second water outlet is provided. The second flowing water portion, the filter net, and the sliding member constitute a strainer. In addition, a stirring member is provided on the inner peripheral surface of the horizontal drum to assist the movement of the particulate filter medium during rotation of the drum.

However, in this conventional apparatus, since the strainer can be provided only in a limited area, the area for the filtration function is small, the efficiency is low, the backwashing time is long, and Large flow of washing water is required. Further, the fixed strainer has a large amount of rubbing with the granular filter medium, but the damage and the like are severe, so that maintenance such as replacement thereof is difficult. Further, in the method as disclosed in Japanese Patent Application Laid-Open No. Hei 7-171313, there is no backwashing means, and only by rubbing with the particulate filter medium, a dirt is clogged on the water holes of the upper partition plate, or The collected suspension in the filter medium may become clogged on the water holes above the lower partition plate, leading to a decrease in filtration function. Therefore, the inventors of the present application have previously increased the filtration efficiency by increasing the area of the filter net, and at the same time, the filter medium was slid into contact with the filter mesh at the time of backwashing, so that the dirt and suspended matter adhering to the filter network without difficulty. The present invention has proposed a filter device capable of destroying and removing the same and washing the filter medium with a small amount of washing water of about 1/10 as compared with the conventional fixed filter device. In addition, the filter net is a wedge wire, and the direction of the slit is the same as the rotation direction of the horizontal drum during washing, so that the inner wall of the drum and the granular filter medium can be smoothly rubbed and the granular filter medium is destroyed. There has also been proposed a filtration device that can more easily and almost completely remove the collected suspension without doing so.
However, in these various conventional devices, there is no space between the inner wall of the drum and the back surface of the filtration net, and the inside of the drum is not washed to the back side of the filtration net. , Algae and the like, and the occurrence of mold and the like.

[0006]

First, even when filtering between the plate-shaped filter net and the inner wall of the drum, the filter has a function of self-cleaning the back surface of the filter net and a function of preventing adhesion of algae and the like, so that dirt and algae can be prevented. Provided is a filtration device which prevents the adhesion of such substances and the generation of molds and the like, and automatically cleans by rotation of a drum even if dirt or the like adheres. Secondly, the filter device has a self-cleaning function of the back surface of the filter network and a function of preventing algae and the like from adhering even during filtration between the plate-like filter net and the inner wall of the drum, so that dirt and algae can adhere. To provide a filtration device that prevents the generation of mold, mold, and the like, and automatically cleans by rotation of a drum even if dirt or the like adheres. Third
In addition, the present invention solves the second problem by improving the filtration efficiency by extending the filter tank to the entire width in the drum by piping all the pipes outside the drum. 4th to 6th
Further, in addition to any of the first to third problems, even with a simple structure, it is possible to reliably prevent the attachment of dirt and algae, prevent the generation of mold and the like, and adhere the dirt and the like. Provided is a filtration device having a self-cleaning function of the back surface of a filtration network that can be removed even when the filtration device is used. Seventh, in addition to any one of the first to sixth problems, there is provided a filter device which can always keep clean by mixing or covering a deposit preventive means with a deterrent.
Eighthly, in addition to any one of the first to seventh problems, even if the back surface of the filtration net becomes dirty, the filtration net can be easily attached and detached, so that a filtration device that can be repaired, inspected, or cleaned is provided. To do. Ninth, in addition to any of the first to eighth problems, even if the back surface of the filtration net becomes dirty, the filtration net can be attached and detached together with the lid, so that the attachment and detachment of the filtration net can be more easily performed. To provide a filtration device that can be easily repaired, inspected or cleaned by anyone. Tenth, in addition to any of the first to ninth problems, the filter net is a wedge wire, and the direction of the slit is set to be the same as the rotation direction of the drum at the time of washing. Provided is a filtration device capable of smoothly rubbing the inner wall of a drum with a granular filter medium without causing the granular filter medium to be caught between the filter elements and removing the collected suspension without difficulty. First
First, in addition to any one of the first to tenth problems, by merely mixing or coating the filter net with a deterrent, cleaning of the back surface of the filter net is not required for a long time, thereby preventing adhesion of algae and the like. To provide a reliable filtration device. Twelfthly, in addition to any one of the first to eleventh problems, since the movement of the drum is a swinging movement, the drum is collected in a reciprocating movement in which rubbing between the filter net and the particulate filter medium is repeated. To provide a filtration device that can remove suspensions more completely without difficulty.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention firstly discloses a horizontal drum in which a filter tank made of a granular filter medium and a space are formed in a vertical direction inside the drum. A first flow pipe for raw water inflow and sewage discharge from the outside of the drum, and a first flow pipe for raw water inflow and sewage outflow from the axial center of the drum; And a second flush pipe for inflow of washing water and outflow of washing water, wherein a second flushing section for inflow of washing water and outflow of flushing water is located in the filtration vessel. of the plate-shaped filter screen you rotate annexed with the drum, the plate-like
A gap is formed between the filter net and some inner walls of the horizontal drum
Then, the gap is communicated with the second flushing portion for inflow of drainage and outflow of washing water, and between the plate-shaped filtration net and the inner wall of the drum, cleaning of the back surface of the filtration net following the rotation of the drum, removing algae, etc. A gist of the present invention is a filtration device provided with a deposit preventing means. Secondly, a horizontal drum in which a filter tank made of a granular filter medium and a space are formed in the vertical direction inside, and a first flowing water portion for inflow of raw water and outflow of sewage from the outside of the horizontal drum from its axial center portion A first flowing pipe for raw water inflow and sewage outflow located in the space, and a second flowing water section for inflow and washing water outflow from the outside of the horizontal drum from the axial center thereof are located in the filtration tank. A second drain pipe for draining inflow and washing water outflow.
Wherein the the濾槽within the space portion by attaching a plate-shaped filter screen you rotate together with the horizontal drum, the plate-shaped filter screen and horizontal
A gap is formed between a part of the inner wall of the drum and the gap and the inside of the filter tank are communicated with the second flowing water section for draining inflow and washing water, and in the space, raw water is inflowing and contaminated water. A plate-shaped filtration net communicating with the first outflow pipe for outflow is provided, and between the plate-shaped filtration net and the inner wall of the drum, cleaning of the back surface of the filtration net following the rotation of the drum, deposits such as algae, etc. The gist is a filtration device provided with a prevention means. Third, a horizontal drum in which a filter tank made of a granular filter medium and a space portion are formed in the vertical direction inside the inside thereof, and a first flowing water portion for raw water inflow and sewage outflow are piped outside the horizontal drum. There annexed plate-shaped filter screen you rotate with said horizontal drum in the space portion, the plate
A gap between the filtration net and some inner walls of the horizontal drum
The gap is communicated with the first flowing water section for raw water inflow and sewage discharge, and a second flowing water pipe for filtered water inflow and washing water outflow is provided outside the horizontal drum, and the piping is connected to the filter tank. with communicating with the second flowing water unit for to have drainage inlet and the washing water flowing out of position within, the in the濾槽annexed plate-shaped filter screen you rotate with said horizontal drum, the plate Filtration net and horizontal type
A gap is formed between the inner wall and a part of the inner wall of the drum, and the gap is communicated with the second flowing water portion for draining water inflow and washing water outflow,
Further, a gist of the present invention is a filtration device provided with means for cleaning the back surface of the filtration network and for preventing the attachment of algae or the like on the back surface of the filtration network following the rotation of the drum between each of the plate-shaped filtration network and the inner wall of the drum. 4th
The gist of the filter device according to any one of claims 1 to 3, wherein the cleaning / adhering material adhesion preventing means such as algae has a large number of brushes planted on a single plate. Fifthly, the gist of the filter according to any one of claims 1 to 3, wherein the cleaning / adhesion prevention means such as algae is provided with at least one rotating brush on an opposing plate. I do.
Sixthly, the gist of the present invention is a filtering device according to any one of claims 1 to 3, wherein the cleaning / adhering material adhesion preventing means such as algae is a large number of sliding masses. Seventh, the gist of the filter device according to any one of claims 4 to 6, wherein a deodorizing agent or the like is mixed or covered with the means for preventing attachment of deposits such as cleaning and algae. I do. Eighthly, the gist of the present invention is a filter device according to any one of claims 1 to 7, wherein the plate-like filtration network is detachably attached to a horizontal drum. Ninth, the gist of the filter device according to any one of claims 1 to 7, wherein the plate-like filtration net is attached to an inner surface of a lid attached to the horizontal drum and detachably attached together with the lid. I do. Tenth, the plate-shaped filtration net is a wedge wire composed of a number of slits formed by cutting into a substantially plate-shaped plate, and the direction of the slits is made the same as the rotation direction of the horizontal drum. The gist of the present invention is a filtration device according to any one of claims 1 to 9. First
The gist of the present invention is a filtration device according to any one of claims 1 to 10, wherein a filtering agent or the like is mixed or coated in a plate-like filtration net. Twelfth, a gist of the present invention is the filtering device according to any one of claims 1 to 11, wherein the rotation of the horizontal drum of the filtering device is a rocking motion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, means for cleaning the back surface of a filter net and preventing foreign matter such as algae of the filter device of the present invention will be described with reference to FIGS. 1 to 15. As shown in FIGS. 1 to 3, a horizontal drum 3 in which a filter tank 1 made of a granular filter medium and a space 2 are formed in the vertical direction inside, and an axial center portion of the horizontal drum 3 from outside. A first flowing water pipe 5 for raw water inflow and sewage outflow that is penetrated and a first flowing water section 4 for raw water inflow and sewage outflow is located in the space portion 2, and an axial center of the horizontal drum 3 is penetrated from outside the horizontal drum 3. No.2 for inflow of drainage and outflow of washing water
In a filtration device having a second flowing water pipe 7 for draining and inflowing washing water in which the flowing water portion 6 is located in the filtration tank 1, various plate-like (for example, a wire mesh, a perforated plate made of metal or synthetic resin) is used. A filter mesh 8 is fixed directly to the filter tank 1 of the horizontal drum 3 or by welding or bonding to a flange or the like, or preferably, is provided on substantially the entire inner surface of the lid 9 at the four ends of the lid. It is fixed by welding or the like via the letter-shaped member or the flange 10, or
It is removably provided in the filter tank 1 or on the inner surface of the lid 9 with bolts and nuts 11 or the like. The filter net 8 is provided substantially flush with the inner surface of the horizontal drum 3 by the bracket-shaped member and the flange 10. Further, the gap 1 between the filtration net 8 and the lid 9
The filtered water filtered at 3 is connected to the second flowing water section 6 for inflow of filtered water and outflow of cleaning water for allowing washing water (which may be raw water, hereinafter referred to as washing water) to pass therethrough. The lid 9 is detachably attached to the horizontal drum 3 with bolts and nuts 12 or the like. Further, as shown in FIG. 6, in the first flowing water pipe 5 for raw water inflow and sewage outflow where the first flowing water section 4 for raw water inflow and sewage outflow is located in the space 2, the first flowing water pipe 4 for raw water inflow and sewage outflow is provided. 1 A plate-like variety (for example, wire mesh,
A filtration network 8 such as a perforated plate made of metal or synthetic resin) is fixed directly into the filter tank 1 of the horizontal drum 3 or by welding or bonding to a flange or the like, or preferably over substantially the entire inner surface of the lid 9. It is fixed by welding or the like via a bracket-shaped member or a flange 10 provided at the four ends of the lid, or is detachably attached to the filter tank 1 or the inner surface of the lid 9 with bolts and nuts 11 or the like,
Auxiliary filtration means may be provided at the raw water inflow / sewage outflow site. In this case, it is natural that a means for cleaning the back surface of the filtration net and preventing foreign substances such as algae is provided.

Next, a case where a substantially plate-shaped filter net 8 attached to substantially the entire back surface of the lid is provided over the entire width of the horizontal drum 3 will be described with reference to FIGS. (I)
As shown in the figure, the upper, lower, left and right edges of the wedge wire are preferably exchangeably attached to the entire back surface of the lid with bolts and nuts via members and flanges 10. As shown in FIG. 9 (b), a part of the wedge wire 8 is provided with a slit 8c which will be described later, and a part 8d where the slit 8c is not provided is provided.
The short pipe 8e is attached by welding or the like to the
As shown in (1), the lid is detachably attached by fitting it to the second flowing water pipe 7 for draining water inflow and washing water outflow or the first flowing water part 4 for raw water inflow and wastewater outflow. The fitting portion may be a tube tapered to each other, or a recess for fitting a packing such as an O-ring into the fitting portion may be formed in any of the tubes to embed the packing. Although not shown, a cover 9 is provided above the horizontal drum 3, and a filtration network 8 is provided on a member or flange provided on the drum 3 in the entire width or a part below the horizontal drum 3, on a bolt / nut or on the inner wall of the drum 3. It may be detachably mounted so that it can be replaced by fitting it into the groove. Further, as shown in FIG. 4, preferably, the filtration net 8 is a wedge wire, and a large number of slits 8c formed by cuts 8a.
…. Further, although not shown, it is also possible to adopt a configuration in which the slits 8a..., 8b... Are formed by depressions alternately pushed in, and the gap between the depressions and the plate-like lower surface is smaller than the desired diameter of the filter medium. As shown in FIG.
The lid and the filter net 8 of the wedge wire attached to the inner surface thereof may be made to coincide with the curved surface of the horizontal drum 3, and there is no difference in operation even if only the filter net 8 is flat or flat. In the present invention, the curved surface, the flat shape, or the flat shape is referred to as a substantially plate shape. As shown in FIG. 5, reinforcing ridges 8f are provided at desired intervals in a direction perpendicular to the slit direction on the back surface of the filtering net 8 of the wedge wire so that the filter members and the water can withstand the load. It is preferable to provide reinforcing ridges 8g at desired intervals also in the slit direction. In addition, in each embodiment, in the case of the same reference numeral and the same structure, the description is omitted.

The horizontal drum 3 and the first flush pipe 5 for raw water inflow and sewage discharge are fitted by a bearing 16 with a dust seal 14, a gland packing 15 and the like interposed therebetween.
The bearing 16 is fixed to the end wall of the horizontal drum 3, and the gear sprocket 17 provided with the bearing 16 is rotated by the driving force of the motor 18 (or may be driven by a pulley and a belt). On the support frame 20 of the base 19, the horizontal drum 3 is rotatably supported by three cam followers (spherical outer rings) 21 attached to the support frame 20 at intervals of 120 degrees. Further, a second flowing water section 6 for draining inflow and flushing water, which is in communication with the filtration network 8, is located in the filter tank 1, and a filter in communication with the second flowing section 6 for draining inflow and flushing water. The second flowing water pipe 7 for water inflow and washing water outflow is fixed integrally with the bearing 22 to the other end of the horizontal drum 3, and on the support frame 20 of the bearing 22 and the base 19,
Three cam followers (spherical outer ring) mounted at 0 degree intervals 2
3, the horizontal drum 3 is rotatably supported.

Further, between the plate-shaped filtration net 8 and the inner wall of the drum 3, means for cleaning the back of the filtration net following the rotation of the drum and for preventing the adhesion of algae and the like are provided. As shown in FIGS. 11 to 15, preferably, a plurality of synthetic resin or metal brushes 32 are implanted on a single metal or synthetic resin plate 31, or
A metal or synthetic resin plate 34 facing the connecting rod 33
The bearing tube 35 is attached by welding or bonding to the
Both ends of a synthetic resin or metal rotating shaft 37 of a pair of rotating brushes 36 having synthetic resin or metal feathers are inserted. The rotating brush shaft is flexible and bent at both ends of a bearing tube. It may be inserted into the inner diameter portion 38. Also, means for cleaning the back of the filter net and preventing deposits such as algae,
Although not shown, a large number of lumps obtained by mixing an abrasive with a foam material may be used. The shape of this lump is preferably spherical, but it may be a lump having irregularities in a spherical shape, a cube, or a polyhedron, and the material may be metal, ceramics, or a bundle of brushes, and the like. It is called an ingot. More preferably, the means for cleaning the back surface of all the above-mentioned filtration nets and for preventing attachments such as algae are preferably made of a synthetic resin material, and mixed or covered with a deodorant,
Even when used for a long period of time, these deposit preventing means can prevent deposits such as algae, and are easy to maintain, clean, and prevent a decrease in filtration efficiency. As these deodorants, "Trademark Siabendazole, T, B, Z (manufactured by Merck, USA) having high safety without decomposition even at high temperatures,
Chemical name "2 (4-thiazolylbenzmidazole)"",
Alternatively, there may be mentioned “Binazine (trade name, manufactured by Bentron, USA), chemical name“ 10,10 oxyphenoxyarsine ””, “Nobcoside N-96 (trade name, manufactured by Sannobuco, USA)”, etc. In addition, chlorhexidine and A bactericide consisting of one or more silver salts may be coated, or a composition in which fine metal copper and a rosin-based resin are dispersed in a spreading agent composed of a cellulose-based polymer may be used. Any means can be used as long as it can prevent the adhesion of algae and the like to these means by coating, and the means is not limited to those described above. It is advisable to mix or cover the same filtering agent or the like into the filter net of the shape. May be determined the size of the width of the brush,
Alternatively, brushes 32 may be planted on both sides of the plate 31 and the surface in contact with the drum 3 may be a curved surface conforming to the shape of the drum.
Also, the width of the plate-like brush and the diameter of the rotating brush may be set to a size that can freely move between the filtration net and the inner wall of the drum. Furthermore, when a substantially plate-shaped filtration net is made of a synthetic resin such as polypropylene and mixed with a deodorant, etc., and when the cover is attached to the lid, the lid is also made of synthetic resin and mixed with the deodorant and the like. If the filter is made transparent, the inside can be inspected. If these filtration nets and lids are made of metal, they may be coated with a deodorizing agent or the like.

The horizontal drum 3 is provided with a filtration net 8 so that the rotation of the horizontal drum 3 is stopped so that the second flowing water section 6 for draining and inflowing washing water flowing downward is stopped.
The rotation of the horizontal drum 3 is stopped by a cam switch (not shown) provided at a desired position and a cam switch which comes into contact with the cam so that the second flushing section 6 for inflow of drainage and outflow of washing water is downward. It has become. This mechanism detects a position where the second flowing water part 6 for inflow of drainage and outflow of washing water is lowered by a sensor (not shown), and detects a rotation angle of a rotating bearing or the like (not shown). ), And the horizontal drum 3 is positioned so that the second flowing water portion 6 for inflow of filtered water and outflow of washing water is downward.
May be stopped. The fixed pipe 24 which does not rotate with the bearing 22 and communicates with the second flush pipe 7 for inflow of drainage and outflow of washing water is attached via a dust seal, a gland packing 15, a gland presser and the like. . Further, a valve control 25 is mounted on the pipe to selectively supply raw water and washing water, which will be described later, into the horizontal drum 3. Reference numeral 26 denotes a raw water inlet, reference numeral 27 denotes a treated water outlet, and reference numeral 28 denotes a drainage outlet.

Further, in the above embodiment, the second drainage pipe 7 for inflow of drainage and outflow of washing water, which is communicated with the second outflow section 6 of inflow of drainage and washing water, is piped inside the horizontal drum 3. However, in order to increase the size of the filter tank and to prevent the filter medium from rotating and impinging on the second flush pipe 7 for draining and flushing water, as shown in FIG. The second running water pipe 7 may be provided outside the horizontal drum 3. Then, the substantially plate-shaped filtration net 8 is connected to the horizontal drum 3.
Can be attached to almost the entire length of the filter, which leads to a further increase in filtration efficiency. Further, as shown in FIG. 10, the tip of the first flowing water portion 4 for raw water inflow and sewage outflow located in the space portion 2 is plugged or the like, and water is sprayed from the side wall of the first flowing water portion 4. Alternatively, the first running water section 4 for raw water inflow and sewage outflow may be attached to the entire width of the horizontal drum 3. In this case, an auxiliary filtering means is also attached to the first flowing water section 4 for raw water inflow and sewage discharge shown in FIG. 6, as shown in FIG. As shown in FIG. 7, the first flowing water section 4 may be provided outside the horizontal drum 3 in the same manner as the outside of the horizontal drum 3 is provided. As described above, since the filter tank 1 can be widened to the entire width in the drum 3, the filtration efficiency can be improved. Further, the rotation of the horizontal drum 3 is a rocking motion, and a filter net 8 is preferably provided at a central portion of the inside of the horizontal drum 3, and the second flowing water pipe 7 for inflow of filtered water and outflow of washing water is connected to the horizontal drum 3. When the pipe is provided outside the drum 3, the drum 3 can be miniaturized with a small power, and the motor 18 can be rotated forward or backward, or swing by a rack or the like that reciprocates with a pinion (not shown) provided on the horizontal drum 3. . An inspection window for observing the inside of the horizontal drum 3 at an arbitrary position or on the lid may be provided. Further, as shown in FIG. 2, the entire filter device is covered with a cover 30 with a roof so that the filter device can be carried.

Then, in the filtration device, the raw water
As shown by the solid line arrow therein, the raw water inlet 26 → pipe 29 → first flowing water pipe 5 → first flowing water part 4 → space part 2 → filter layer surface → filtration layer 1 → substantially plate-shaped filtration network 8 → second The treated water outlet 28 is passed through the flowing water part 6 → the second flowing water pipe 7. Next, the filter medium cleaning action of the filtration device will be described. The washing water (which may be raw water) is continuously flown into the drum 3 from the second flush pipe 7 by operating a pump (not shown) or the like as indicated by a dotted arrow, and the driving means 17 drives the drum 3. To 19 or the like. As a result, when the drum 3 rotates and the granular filter material in the filter layer 1 becomes larger than the angle of repose, the granular filter material starts to collapse, the granular filter materials rub against each other, and the adhered suspended particles of the granular filter material are dissociated. It is also rubbed with a substantially plate-shaped filtration net 8 attached inside the filter, and dissociates the suspended solids on the substantially plate-shaped filtration net 8, so that it can be washed with a smaller volume of washing water especially as compared with a conventional filtration device. These dissociated adhering turbids are separated from the raw water inlet 2 as indicated by the dotted arrows indicating the flow of the washing water.
6 → second flowing water pipe 7 → second flowing water part 6 → substantially plate-shaped filtration network 8 of second flowing water part 6 → filter layer 1 → filter layer surface → space part 2 → first flowing water part 4 → first flowing water pipe Through 5, the water is discharged to the outside 27.
Therefore, in the filter medium washing of this filter device, the granular filter medium is rubbed with a substantially plate-shaped filter net provided in the drum 3,
Dissociation of the turbid matter adhered to the substantially plate-shaped filtration network, dissociation of the turbid matter adhered to the granular filter medium by rubbing between the granular filter materials, and washing from the second flowing water portion 6 in the filter layer 1 It is performed almost completely due to the synergistic effect with the outflow of water. Next, the usage of the stirring device of each of the embodiments will be described. When the filter medium is used for a predetermined time as a normal filtration device and the filter medium is backwashed with water, it is rotated by a horizontal drum driving means, and the inner circumference of the drum is rotated. The filter medium is collapsed on the surface, and the filter medium is forcibly rubbed between the filter medium and the substantially plate-shaped filter net to dissociate the attached suspended matter. Also, to replace the filter net, if the filter is attached to the back of the lid and the filter media is stopped at a position where the filter media is not covered and the lid can be easily removed, the filter media will be removed. It can be easily removed together with the lid without spilling, making it easy to replace.Clean the filter net following the rotation of the drum between the plate-shaped filter net and the inner wall of the drum.
Preferably, a plurality of brushes are implanted on one plate, or at least one rotating brush is attached to the opposing plate, or a large number of sliding contact masses are attached between the filtration net and the inner wall of the drum. The brush etc. slides on the back side of the filtration net according to the rotation of the drum during backwashing during filtration and of course prevents adhesion of dirt and algae, etc. So it can be automatically drained with water.

[0015]

First, since the filter device has a self-cleaning function of the filter net even when filtering between the plate-shaped filter net 8 and the inner wall of the drum 3, the self-cleaning function and the algae as the drum rotates. The anti-adhesion function prevents the adhesion of dirt and algae by sliding on the back surface of the filter net, and at the same time removes dirt and the like, so that they can be automatically discharged to the outside together with water. Second
In addition, the filter device has a function of self-cleaning the back surface of the filter network and a function of preventing algae and the like from adhering even when filtering is performed between the upper and lower plate-like filter nets 8 and the inner wall of the drum 3 so that the filtering means is doubled. Filtration that improves efficiency, prevents dirt, algae, etc. from adhering and molds from occurring as much as possible, and even automatically cleans with dirt and other cleaning means that follows the rotation of the drum. Device. Third, in addition to the second effect, the present invention provides a filtration device in which all the pipes are provided outside the drum, whereby the filtration tank can be widened to the entire width in the drum, thereby improving the filtration efficiency. Fourth to sixth, first to third
In addition to any of these effects, even if it has a simple structure, it can reliably prevent the attachment of dirt and algae, and can prevent the generation of mold and the like, and can also remove the dirt, etc., even if it adheres to the back side of the filtration net Is a filtration device having a self-cleaning function. Seventh, in addition to the effects of any of the first to sixth aspects, since the adhering substance preventing means is mixed or covered with a deterrent agent, it can be always kept clean even for a long time, so that maintenance is easy. It is a filtration device. Eighth, in addition to the effects of any one of the first to seventh aspects, even if the back surface of the filtration network becomes dirty, the filtration network can be easily attached / detached, so that a filtration device that can be repaired, inspected, or cleaned can be provided. is there. Ninth, in addition to any of the first to eighth effects, even if the back surface of the filtration net is soiled, the filtration net can be attached and detached together with the lid, so that the attachment and detachment of the filtration net can be more easily performed. It is a filtration device that can be easily repaired, inspected or cleaned by anyone. Tenth, in addition to the effects of any one of the first to ninth aspects, the filter net is a wedge wire, and the slit direction is the same as the rotation direction of the drum at the time of washing, so that the slit of the wedge wire is changed. This is a filtration device capable of smoothly rubbing the inner wall of the drum with the particulate filter medium without interposing the particulate filter medium between the drums and removing the collected suspension without difficulty and completely. Eleventh, in addition to the effects of any one of the first to tenth aspects, by simply mixing or coating the filter net with a deterrent, cleaning of the back surface of the filter net is not required for a long time, and adhesion of algae and the like can be prevented. It is a filtration device that can be made more reliable. Twelfthly, in addition to any of the first to eleventh effects, the movement of the drum is oscillating, so that the rubbing between the filter net and the particulate filter material is collected in a reciprocating motion that is repeated. It is a filtration device that can remove suspended matter more completely without difficulty.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a filtration device according to the present invention.

FIG. 2 is a right side view of FIG. 1 of the filtration device according to the present invention.

FIG. 3 is a left side view of FIG. 1 of the filtration device according to the present invention.

FIG. 4 is a partially enlarged plan view of a plate-like filtration network according to the present invention.

FIG. 5 is a partially enlarged plan view of the back surface of FIG. 4 according to the present invention.

FIG. 6 is a sectional view showing a second embodiment of the filtration device according to the present invention.

FIG. 7 is a sectional view showing a third embodiment of the filtration device according to the present invention.

FIG. 8 is an enlarged plan view in which a plate-shaped filtration net according to the present invention is attached to the back surface of a lid.

9 (a) and 9 (b) show FIGS. 7 and 8 according to the present invention.
FIG. 2 is a partially enlarged plan view of a filtration network used for the present invention.

FIG. 10 is a sectional view of a filtration device showing a fourth embodiment of the filtration device according to the present invention.

FIG. 11 is a plan view of an embodiment of a means for cleaning the back surface of a filter net and preventing deposits such as algae according to the present invention.

FIG. 12 is a side view of FIG. 11 according to the present invention.

FIG. 13 is a plan view of a part of another embodiment of a means for cleaning the back surface of a filtration net and preventing attached matter such as algae according to the present invention.

FIG. 14 is a side view of FIG. 13 according to the present invention.

FIG. 15 is a side view of the brush used in FIG. 13 according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration layer 2 Space part 3 Horizontal drum 4 1st flowing water part 5 1st flowing water pipe 6 2nd flowing water part 7 2nd flowing water pipe 8 Filtration net 9 Cover 10 Member or flange 11, 12 Bolt and nut 16, 22 Bearing 18 Motor 19 Base 20 Support frame 21, 23 Cam follower 24 Fixed tube 31 One plate 32 Brush 33 Connecting rod 34 Plate 35 Bearing tube 36 Rotating brush 37 Rotating shaft 38 Inner diameter of bearing tube

Claims (12)

(57) [Claims] 1. A horizontal drum (3) in which a filter tank (1) made of a granular filter medium and a space (2) are formed vertically inside, and a shaft from outside the horizontal drum (3). A first flow pipe (5) for raw water inflow and sewage discharge from which a first flow section (4) for raw water inflow and sewage discharge is located in the space (2) from the core, and the horizontal drum (3); A second flowing water section (6) for draining inflow and washing water outflow is located in the filtration tank (1). in the filtration device having the bets and the濾槽(1) the annexed plate-shaped filter screen you rotate with said horizontal drum (3) (8), the plate-shaped filter screen
A gap between (8) and a part of the inner wall of the horizontal drum (3)
(13) is formed, and the gap (13) is communicated with the second flushing portion (6) for inflow of filtered water and outflow of washing water, so that the plate-shaped filtration network (8) and the inner wall of the drum (3) are formed. A filtering device, comprising means for cleaning the back surface of a filtration net following the rotation of a drum and preventing deposits such as algae. 2. A horizontal drum (3) in which a filter tank (1) made of granular filter media and a space (2) are formed in the vertical direction inside, and a shaft from outside of the horizontal drum (3). A first flow pipe (5) for raw water inflow and sewage discharge from which a first flow section (4) for raw water inflow and sewage discharge is located in the space (2) from the core, and the horizontal drum (3); A second flowing water section (6) for draining inflow and washing water outflow is located in the filtration tank (1). attached in the filtration device, wherein濾槽(1) in the space (2) in a plate-shaped filter screen you rotate with said horizontal drum (3) to (8) with bets
Then, one of the plate-shaped filtration net (8) and the horizontal drum (3) is used.
Forming a gap (13) between the portion walls, communicates with said gap (13) and the drainage inlet and the second flowing water unit for washing water outlet (6) within濾槽(1), the space ( In 2), a plate-like filter net (8) communicating with the first flowing water pipe (5) for raw water inflow and sewage discharge is provided, and between the plate-like filter net (8) ... and the inner wall of the drum (3). Each of which is provided with means for cleaning the back surface of the filtration net following the rotation of the drum and for preventing adhesion of algae and the like. 3. A horizontal drum (3) in which a filter tank (1) made of a granular filter medium and a space (2) are formed in the vertical direction inside, and a first flowing water section (4) for inflow of raw water and outflow of sewage. ) Is piped outside the horizontal drum (3), and the pipe is connected to the space (2).
Leaf you rotate with said horizontal drum (3) to within
Filter mesh (8) is attached, and the plate-shaped filter mesh (8)
A gap (13) is formed between the horizontal drum (3) and a part of the inner wall.
The gap (13) is communicated with the first flowing water section (4) for raw water inflow and sewage discharge, and the second flowing water pipe (7) for infiltration and washing water outflow is provided with a horizontal drum ( 3), and the pipe is communicated with the second flowing water section (6) for draining and inflowing washing water located in the filtration tank (1).
The said濾槽(1) in annexed the said plate-shaped filter screen you rotate with horizontal drum (3) (8), the plate-like filtration
Between the mesh net (8) and a part of the inner wall of the horizontal drum (3)
A gap (13) is formed, and the gap (13) communicates with the second flowing water section (6) for inflow of filtered water and outflow of washing water, and furthermore, these plate-shaped filtration nets (8) and the drum (3). A) a filter for cleaning the back surface of a filtration net that adheres to the rotation of the drum between the inner walls of the filter. 4. A cleaning device according to claim 1, wherein said cleaning means includes a plurality of brushes (32) implanted on a single plate (31). Or 1
Item 3. The filtration device according to Item 1. 5. The cleaning means according to claim 1, wherein said means for preventing the attachment of foreign matter such as algae has at least one rotating brush attached to an opposing plate. The filtration device according to claim 1. 6. The filtering apparatus according to claim 1, wherein the means for preventing the adhesion of the foreign matter such as cleaning and algae is a large number of sliding masses. 7. The filtering apparatus according to claim 4, wherein a deodorizing agent or the like is mixed or covered with the cleaning / adhering substance preventing means. 8. The filtering device according to claim 1, wherein the plate-like filtering net is detachably attached to the horizontal drum. 9. A filter net (8) having a plate shape is attached to the inner surface of a lid (9) attached to a horizontal drum (3).
2. The device according to claim 1, wherein the device is detachably mounted together with the device.
The filtration device according to claim 7. 10. A plate-like filtration net (8) is a wedge wire composed of a number of slits (8c) formed by cuts (8a), (8b) and the like in a substantially plate-like plate. The direction of the slit is made to be the same as the rotation direction of the horizontal drum (3).
The filtration device according to any one of the above. 11. A plate-like filtration net (8) mixed with or covered with a screening agent or the like.
0. The filtration device according to any one of 0. 12. The method according to claim 1, wherein the rotation of the horizontal drum of the filtration device is an oscillating motion.
The filtration device according to any one of the preceding claims.