JP2011140001A - Apparatus and method for cleaning filter medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for cleaning a filter medium, wherein when the filter medium is cleaned by a simple structure, stains removed when the filter medium is cleaned are not stuck again to the cleaned filter medium and even rigid deposit is surely removed so that a filtration function or durability of the filter medium to be reused is not deteriorated and an increase in the running cost thereof is prevented. <P>SOLUTION: The apparatus for cleaning the filter medium is constituted so that a dehydration cylinder having a water-passable wall is arranged inside a cylindrical casing, an agitating/cleaning part to be rotated by a drive means is arranged inside the dehydration cylinder, and a filter medium supply port for supplying the filter medium to be agitated/cleaned in the dehydration cylinder and a filter medium take-out port for taking out the cleaned filter medium are arranged in the dehydration cylinder, and a drain outlet for draining the water separated by dehydration in the dehydration cylinder is arranged in the cylindrical casing. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a filter medium cleaning apparatus and a filter medium cleaning method for cleaning a used filter medium in order to repeatedly use the filter medium.

For example, when the filter medium of the filter tower or the filter medium of the filter pond becomes old, it is necessary to replace the filter medium because the filtration function is lowered.
However, the old filter medium is legally regarded as industrial waste, and there is a problem that a large amount of waste disposal costs are required to process the old filter medium, and the purchase cost of a new filter medium is increased.
Therefore, the present applicant has previously proposed a filter medium cleaning device shown in Patent Document 1 as a solution to the above-mentioned problems by cleaning and regenerating used filter media.

However, in the filter media cleaning apparatus according to the previous proposal, when the old filter media to be cleaned is sent in a jet stream, the filter media is cleaned at the same time, and sent along with the cleaning liquid containing the washed-out deposits (dirt). Therefore, there is a possibility that cleaning unevenness may occur, or there is a possibility that the deposits such as stubborn dirt may be left behind, making it difficult to perform sufficient cleaning.
Thus, when a filter medium with uneven cleaning or a filter medium on which dirt is reattached is used, there is also a problem that the filtration function and durability are lowered.

JP-A-5-253420

  The present invention has been proposed in view of the above-mentioned problems, and the object of the present invention is to have a simple structure, and when washing the filter medium, the washed filter medium does not re-attach dirt during washing. In addition, a filter medium cleaning device that can prevent even the stubborn deposits from being removed, eliminates a decrease in filtration function and durability of the filter medium to be reused, and prevents an increase in running cost, and It is intended to provide a method for cleaning a filter medium.

  In order to achieve the above object, the filter medium cleaning device of the present invention is provided with a dewatering cylinder having a water passage wall inside the cylindrical casing, and a driving means is provided inside the dehydrating cylinder. In addition to providing a rotatable stirring and washing unit, a filter medium supply port for supplying a filter medium to be stirred and washed in a dehydrating cylinder and a washing filter medium outlet for taking out the washed filter medium are provided in the dehydrating cylinder, and dewatering is performed in the dehydrating cylinder. The main feature is that a drain outlet for draining water is provided in the cylindrical casing.

  Further, the filter medium cleaning apparatus according to the present invention is such that the water passage wall of the dewatering cylinder is formed of a wedge wire, the stirring shaft of the stirring cleaning section is a hollow shaft, and the filter medium inlet is provided above the hollow shaft. In addition, a filter medium outlet is provided in the lower part so that the filter medium can be cleaned even in the hollow shaft, and the stirring cleaning unit is provided with a stirring shaft that is rotationally driven by a driving means at a substantially central portion of the dehydrating cylinder. It is also characterized in that the shaft is spiral or curved so that a part thereof is offset from the center.

  In the method for cleaning a filter medium according to the present invention, a dehydration cylinder provided with a stirring and cleaning unit that is rotationally driven by a driving means is disposed in a cylindrical casing in a central portion, and is supplied together with water from a filter medium supply port to the dehydration cylinder. While separating the filter medium with water using a dehydrating cylinder, the filter medium is rubbed together in the stirring and washing unit to peel off the deposits on the surface, and the peeled deposits are combined with the water separated from the filter medium. The main feature is that the filter medium is discharged to the outside of the dewatering cylinder and the washed filter medium is taken out from the cleaning filter medium outlet.

According to the filter medium cleaning device and the filter medium cleaning method of the present invention, a dewatering cylinder having a water flow wall is provided inside the cylindrical casing, and the dewatering cylinder 38 can be rotated by driving means. In addition to providing a cleaning unit, a filter medium supply port for supplying a filter medium to be stirred and washed in a dehydrating cylinder and a cleaning filter medium outlet for extracting the washed filter medium are provided in the dehydrating cylinder, and the dehydrated water is drained by the dehydrating cylinder. Since the drainage port is provided in the cylindrical casing and is cleaned while rubbing the filter media to be cleaned, even stubborn deposits on the surface of the filter media can be surely peeled and removed.
As a result, there is an advantage that homogeneous and sufficient cleaning can be performed, and the quality and durability of the filter medium to be recycled can be greatly improved.

1 is a schematic view of a filter medium recycling system according to the present invention. These are the longitudinal cross-sectional views of the washing | cleaning apparatus of the recycling system of the filter medium concerning this invention. These are perspective views of the cylinder 38 for dehydration which comprises the stirring washing | cleaning part of the recycling system of the filter medium concerning this invention. These are the perspective views of the stirring shaft part which comprises the stirring washing | cleaning part of the recycling system of the filter medium concerning this invention. These are perspective views which show the modification of the stirring shaft part which comprises the stirring washing | cleaning part of the recycling system of the filter medium concerning this invention.

Hereinafter, the most preferred embodiments according to the filter medium cleaning apparatus and the filter medium cleaning method of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view of a filter medium recycling system for cleaning and reusing a filter medium. Reference numeral 1 in the drawing generally indicates the filter medium recycling system.
The filter medium referred to in the present invention includes, for example, natural stone as well as granular ion exchange resin used in an ion exchange tower for performing ion exchange.

This filter medium recycling system 1 includes a water tank 2, a water storage unit 3 supplied with water from the water tank 2, a filter medium storage unit 4 for cleaning, first to third class cleaning units 5, 6, and 7, and a shower ring. The cleaning unit 8 includes cleaning units 5 to 8 and cleaning / conveying means 10 a, 10 b, and 10 c that supply the cleaning unit 5 to a desired place while cleaning the filter medium 9 from the cleaning filter medium storage unit 4.
The water supply tank 2 is provided with a supply pump 13 for supplying water 11 stored therein to the cleaning filter medium storage unit 4 and the water storage unit 3 through a water supply pipe 12.
The water storage unit 3 is provided with a pressurizing pump 14 that sucks and pressurizes water supplied from the water tank 2 and water from a shower ring cleaning unit 8 to be described later, and supplies the pressurized water to the cleaning units 1 to 8.

The high-pressure water pressurized by the pressure pump 14 is supplied to the cleaning / conveying means 10a and 10b.
Although the detailed illustration of the cleaning / conveying means 10a, 10b, and 10c is omitted, the outline of the cleaning / conveying means 10a, 10b, and 10c will be described. The filter medium is sprayed and spread all over the pipe, and the filter medium that is washed and transported by the negative pressure formed in the negative pressure forming pipe on the injection nozzle side is sucked from the fully expanded section, and the sucked filter medium flows from the negative pressure forming pipe. It comprises a jet pump having a known structure that is configured to be conveyed while being washed to each predetermined washing section via a running tube.

The first classification cleaning unit 5 classifies the input port 15 into which the filter medium 9 is input and the filter medium 9 input into the input port 15 into a plurality of stages in order from the smallest particle size. A plurality of sieves (not shown) having different meshes are provided in the vibrating first classification casing 17, and a cleaning water nozzle 18 for injecting cleaning water is attached to the first classification casing 17.
Below each sieve, a funnel-like shooter 19 for taking out the classified and cleaned filter media and an accumulation box 20 are provided below the large-diameter side shooter 19.
And the 2nd classification washing | cleaning part 6 is provided in the exit 21 side of the 1st classification washing | cleaning part 5, This 2nd classification washing | cleaning part 6 is comprised substantially the same as the 1st classification washing | cleaning part 5. FIG.

That is, a plurality of stages of sieves (not shown) having different meshes are provided in the second classifying casing 22 that vibrates by the earthquake generating means 16, and a cleaning water nozzle that jets cleaning water above the second classifying casing 22. 23 is arranged.
A funnel-shaped shooter 24 is provided below each sieve and at the outlet 21 portion to take out the filtered filter material that has been classified, and a collection box 25 is provided below the shooter 24.
In the figure, reference numeral 26 denotes an opening / closing valve provided in a portion of the pipe 28 for supplying water to the cleaning water nozzle 18, and reference numeral 27 denotes that the vibration of the first classification casing 17 that vibrates with the fixed pipe is prevented from being transmitted to the pipe 28. It is a vibration isolator.

The water storage casing 29 forming the water storage section 3 is washed with a drainage storage section 30 for storing the water separated by the third classification cleaning section 7 and the washed filter medium from the filter medium cleaning section described later. A shower ring cleaning unit 8 is formed, and the filter medium washed with water by the shower ring cleaning unit 8 is collected in a collection box 32.
The third class cleaning unit 7 cleans the finest particle size filter medium classified by the first class cleaning unit 5, and the third class cleaning unit 7 is disposed on the third class casing 33 disposed below the first class cleaning unit 5. The water separator 34 is provided with a water separator 34 for separating water from the filter medium fed from the first class cleaning unit 5 together with the cleaning water, and a filter medium cleaning unit 31 for further cleaning the filter medium from which water has been separated. The water separated by the section 34 is sent to the drainage storage section 30 of the water storage section casing 29 by a water pump 35 and then drained to the outside by a drain pump 36.

As shown in FIG. 1 and FIG. 2, the filter cleaning unit 31 provided in the third classification casing 33 includes a vertically long cylindrical casing 37, a dehydrating cylinder 38 provided inside the cylindrical casing 37, and a dehydrating cylinder. The cylinder 38 is provided with a stirring and washing unit 40 rotatably provided by a driving means 39.
The cylindrical casing 37 includes an upper cylinder 41 and a lower cylinder 42, and a filter medium supply port 43 for a filter medium to be cleaned is formed on the side surface of the upper 41. Filter medium outlets 44 are respectively formed.
The dehydrating cylinder 38 has a triangular shape in plan view as shown in FIG. 2 and is formed in a cylindrical shape by arranging so-called wedge wires 45 so that the water passage gap 46 becomes wider outward. Are fixed in a state where the flange portion 47 provided between the upper tube 41 and the lower tube 42 is sandwiched between the flange portions 47.

Further, the lower part of the dehydrating cylinder 38 is held by an annular shape-retaining member 48, and the shape-retaining member 48 is sandwiched between the lower cylinder 42 and a washing filter medium take-out pipe 49 connected to the lower end thereof. The shape retaining member 48 has a water passage hole 66 formed therein.
In the central portion of the shape-retaining member 48, the cleaning filter medium outlet 44 for extracting the cleaned filter medium is closed by a closing tool 50 that can be opened and closed.
The obturator 50 includes a plate-like member 51 that opens and closes a cleaning filter material outlet 44 at the lower end of the dewatering cylinder 38 formed by the wedge wire 45, and an operation tool 52 that moves the plate-like member 51 up and down. Become.
The operating tool 52 hangs down from the central portion of the plate-like member 51, is formed by a screw shaft that is screwed into the screw hole 6553 of the cleaning filter medium take-out pipe and protrudes to the outside at the lower end, and the head at the lower end is rotated and cleaned. The filter medium outlet 44 is opened and closed. In the figure, reference numeral 54 denotes a lock nut for fixing the screw shaft 53.

As shown in FIG. 1, the agitation washing unit 40 disposed in the dehydrating cylinder 38 is rotationally driven by a driving means (a motor capable of changing the rotational speed) 39 via a transmission line 55 for rotational driving. 4 and a stirring shaft 57 that is rotationally driven by the driving shaft 56. The stirring shaft 57 is configured as shown in FIG.
That is, as shown in FIGS. 2 and 4, the stirring shaft 57 projects a plate-shaped stirring blade 59 from the surface of the cylindrical main body 58, and the stirring shaft 57 is inward of the stirring shaft 57. A pair of filter medium inlets 60 through which the filter medium flows are opened, and a filter medium that takes out the washed filter medium when it flows from the filter medium inlet 60 near the lower half of the stirring blade 59 and flows down inside the stirring shaft 57. The outlet 61 is opened along the stirring blade 59 in a vertically long slit shape.
As shown in FIG. 1, each water pipe 12 is provided with a flow rate adjusting valve 62 or an on-off valve 63.

The operation of the filter medium recycling system 1 configured as described above, in particular, the filter medium cleaning unit 31 will be described.
First, when the pressurizing pump 14 of the water storage unit 3 is activated, the water in the water storage unit 3 is sucked and pressurized, and when high-pressure water is supplied to the cleaning / conveying means 10a, the cleaning medium storage unit 4 The filter medium is sucked and sent to the first classification cleaning unit 5 while being cleaned while being fed by the cleaning / conveying means 10a.
The filter medium is stored in each accumulation box in a state of being classified into filter media having a desired particle size by the first class cleaning unit 5 to the second class cleaning unit 6.
Then, the filter medium of the minimum diameter separated by the first class cleaning unit 5 is directly washed by the shower ring cleaning unit 8 or sent to the third class cleaning unit 7 due to the filter media to be cleaned or dirt adhering to the filter media. Then, it is further washed in the filter medium washing section 31.

The filter medium of the third classification cleaning unit 7 is sent to the filter medium cleaning unit 31, and is supplied from the filter medium supply port 43 into the dehydration cylinder 38 of the stirring cleaning unit and from the filter medium inlet to the inside of the stirring shaft.
The filter medium supplied from the filter medium inlet 60 into the stirring shaft 57 rubs against each other while flowing down to the lower filter medium outlet 61, and the stubborn dirt adhered to the surface is also peeled off and separated.
The filter medium supplied from the filter medium supply port 43 into the dehydrating cylinder 38 of the stirring and washing unit 40 is a plate-shaped stirring blade that protrudes from the surface of the cylindrical main body 58 by the rotation of the stirring shaft 56 by the driving means 39. By stirring at 59, the filter media rub against each other, and the stubborn dirt adhered to the surface is peeled off and separated from the filter media surface.

Thus, the dirt separated from the filter medium and the fragmented fine filter medium are discharged to the outside together with the water adhering to the filter medium from the water passage gap 46 of the wedge wire 45 forming the side wall of the dewatering cylinder 38. When the obturator 50 is opened, the remaining separated dirt and the crushed pieces of the filter medium are sent to the shower ring cleaning unit 8 by the cleaning / conveying means 10b, washed with water, and then cleaned. The filter medium is collected in the collection box 32.
Reference numeral 67 in FIG. 1 is a take-out portion for dirt and the like that is separated from the filter medium and settles in the shower ring washing portion 8, and sludge-like dirt that has settled when the on-off valve 63 is opened is washed and removed. It is configured to be sucked out by driving the transport means 10 c and discharged into the discharge box 68.

In the above-described embodiment, the stirring and washing unit 40 is formed inside the dehydrating cylinder 38 with the stirring shaft 57 that is rotationally driven by the driving means 39, and the filter medium inlet 60 is formed in the upper part and the lower part is formed in the lower part. Although the filter medium outlet 61 is formed, it may be a solid shaft as shown in FIG. 5. In this case, the shaft 57 is directly driven to rotate.
Although not shown, it is also possible to stir the filter medium by bending the stirring shaft 57 in a spiral manner or by biasing its eve so as to be offset from the center of rotation.
The stirring blade 59 in the above embodiment can be a U-shaped arm 64 as shown in FIG. 5, and although not shown, the dehydrating cylinder 38 is formed of a wire mesh or the like instead of a wedge wire. You can also

DESCRIPTION OF SYMBOLS 1 ... Recycling system of filter media 2 ... Water supply layer 3 ... Water storage part 4 ... Filter medium storage part for battlefields 5 ... First classification washing part 6 ... Second classification washing part 7.・ 3rd class cleaning unit 8 ... shower ring cleaning unit 9 ... filter medium 10a, 10b, 10c ... cleaning / conveying means 11 ... water 12 ... water supply pipe 13 ... feed pump 14 ... Pressure pump 15 ... Inlet 16 ... Vibration means 17 ... First classification casing 18 ... Washing nozzle 19 ... Shooter 20 ... Box 21 ... Outlet 22. ··· Second classifying casing 23 ··· Cleaning nozzle 24 · · · Shooter 25 ··· Recovery box 26 · · · Opening and closing valve 27 · · · Anti-vibration device 28 · · · Piping 29 · · · Casing for water reservoir 30 · · ..Drainage storage unit 31 ... Filtering medium cleaning unit 32 .... Accumulation box 33 ... Third classification casing 34 ... Water separation part 35 ... Water pump 36 ... Drain pump 37 ... Cylindrical casing 38 ... Dehydration cylinder 39 ... Drive means 40 ... stirring and washing section 41 ... upper cylinder 42 ... lower cylinder 43 ... filter medium supply section 44 ... cleaning filter medium take-out port 45 ... wedge wire 46 ... gap for water flow 47 ... Flange part 48 ... Shape-retaining member 49 ... Cleaning medium take-out pipe 50 ... Occlusion tool 51 ... Plate-like member 52 ... Operation tool 53 ... Screw shaft 54 ... Lock nut 55 ... Transmission line 56 ... Drive shaft 57 ... Agitation shaft 58 ... Main body 59 ... Agitation blade 60 ... Filter medium inlet 61 ... Filter medium outlet 62 ... Flow rate Control valve 63 ... Open / close valve 64 ... Arm 65 ... Di holes 66 ... water passage hole 67 ... dirt retrieval section 68 ... discharge box

Claims (6)

  A dewatering cylinder having a water flow wall is provided inside the cylindrical casing, and a stirring and washing unit that can be rotated by a driving means is provided inside the dewatering cylinder and a filter medium that is stirred and washed by the dehydrating cylinder is supplied. A filter medium cleaning device, wherein a filter medium supply port and a cleaning filter medium extraction port for taking out the washed filter medium are provided in a dewatering cylinder, and a drain port for draining water dehydrated by the dewatering cylinder is provided in a cylindrical casing. .   2. The filter medium cleaning apparatus according to claim 1, wherein the water passage wall of the dewatering cylinder is formed of a wedge wire.   3. The stirring washing section is provided with a stirring shaft that is rotationally driven by a driving means at a substantially central portion of the dewatering cylinder, and a stirring protrusion or a stirring blade is provided on the stirring shaft. The filter medium cleaning apparatus according to 1.   The stirring shaft of the stirring cleaning section is a hollow shaft, a filter medium inlet is provided at the upper part of the hollow shaft, and a filter medium outlet is provided at the lower part, so that the filter medium can be cleaned even within the shaft. Filter media cleaning equipment.   The stirrer / washer is provided with a stirrer shaft that is rotationally driven by a driving means at a substantially central portion of the dewatering cylinder, and the stirrer shaft is spirally shaped or bent so that a part thereof is offset from the center. The filter medium cleaning apparatus according to claim 1 or 2.   A dehydrating cylinder provided with a stirring and washing unit that is rotationally driven by a driving means at the center is disposed in the cylindrical casing, and water separation of the filter medium supplied together with water from the filter medium supply port to the dehydrating cylinder is performed with the dehydrating cylinder. While carrying out, the filter media are rubbed together in the agitation and washing unit to peel off the deposits on the surface, and the peeled deposits are discharged to the outside of the dehydrating cylinder together with the water separated from the filter media, and washed. A method for cleaning a filter medium, wherein the filtered filter medium is removed from a cleaning filter medium outlet.

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