JP2006007021A - Filter material for separating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter material allowing free adjustment of the magnitude and area of the opening of the material lapped in the filtration chamber. <P>SOLUTION: In the filter material to be stretched in the filtration chamber of a separating apparatus, fixed filter materials 3 and 4 and sliding filter materials 5 and 6 are lapped, and the opening ratio of the pores 1a and 2a of the filter material is adjustable by sliding the sliding filter materials 5 and 6. Since the area of the openings 7 and 8 of the fixed materials 3 and 4 and the sliding materials 5 and 6 overlapped one upon another can be changed arbitrarily in the range of 0-100%, an appropriate area of the opening is obtainable according to the nature of activated sludge, eliminating the need of replacement of the filter material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a filter medium used in a separation apparatus such as separation of solids, separation of a solid from a gas, concentration of a solid in a liquid, filtration dehydration, and the like. Provided is a filter medium in which the size of the opening and the area of the opening degree of the opening of the filter medium hole provided can be arbitrarily adjusted.

Conventionally, metal filter media are excellent in durability, detergency, heat resistance, and peelability, and are often used in separation devices in the sorting, separation, concentration, or filtration fields.
For example, a filter press in which a wedge wire is stretched on a filter plate forming a filtration chamber is proposed by the applicant of the present invention, as described in Patent Document 1, and is more durable than a filter cloth. And excellent peelability of cake.

As described in Patent Document 2, the applicant of the present invention proposes a screw press in which a metal screen with finer filtration is provided on the outer cylinder as the upper layer surface, and fine particles can be captured and washed. Is also excellent. Further, a screw press in which the screen is narrowed from the stock solution supply side to the cake discharge side is also described in Patent Document 3, and as the internal pressure of the filtration chamber increases, the screen screen is made finer and separated. The turbidity of the liquid is reduced.
A continuous pressure filter in which a wedge wire screen is stretched on the side wall of an annular filter chamber provided with an impeller is also known as described in Patent Document 4.
Further, a strainer in which a cylindrical filter medium is rotatably arranged is well known as described in Patent Document 5.

JP 2001-259212 A (Claim 1, FIG. 3) JP 2001-179492 A (Claim 1, FIG. 3) Japanese Patent Laid-Open No. 4-157096 (Claim 1, FIG. 2) JP 2001-70718 A (Claim 1, FIG. 3) JP-A-1994-39215 (Claim 1, FIG. 1)

When determining the opening degree of the filter medium according to the particle size of the solid matter or the properties of the stock solution, it is necessary to check in advance through tests, etc. It was.
When changing the opening of the filter medium, it is necessary to select the filter medium and replace the filter medium with much time and effort.
The size of the openings of the filter media used for these is determined in advance by the manufacturer, and an arbitrary opening size between them has no specification and cannot be obtained.
The present invention provides a filter medium of a separation device that does not require filter medium replacement and can easily adjust the opening while the filter medium is attached.

The filter medium of the separation device according to the present invention has a plurality of filter media that are relatively slidable in the filtration chamber of the separation device, and is capable of adjusting the aperture ratio of the filter medium holes provided in the filter medium. Is configured such that an overlaid filter medium is composed of a fixed filter medium and a sliding filter medium, and the opening can be adjusted by sliding the sliding filter medium.
By relatively shifting the superimposed filter media, the aperture size and area of the opening due to the phase difference of the hole position can be arbitrarily changed, and there is no need to replace the filter media as in the past. .

The filter media can also be used in a filter press, and the filter media that have been installed are stretched over the filter bed of the filter plate installed in the filter press, and the sliding filter media is passed through the working member that penetrates the peripheral seal surface of the filter plate. If you adjust the opening ratio of the filter holes of the fixed filter medium and the sliding filter medium by pressing the side edges of the filter medium, the aperture size and area of the filter medium opening can be arbitrarily set according to the properties of the stock solution and the press-fitting pressure. It can be variable.
The filter media can also be used for screw presses. The fixed filter media is stretched over the outer cylinder of the screw press, and the cylindrical slide filter media is placed over the fixed filter media at the appropriate location, and the slide filter media is mounted on the support frame of the outer cylinder. If the actuating member is provided, the filter medium hole can be made smaller from the stock solution supply side to the cake discharge side, and the turbidity of the separated filtrate can be reduced.
The filter media can also be used in a continuous pressure dehydrator. The fixed filter media and the sliding filter media that have been installed are stretched on the side wall of an annular filter chamber provided with an impeller, and slide on the outer ring of the filter chamber. An operating member for the filter medium may be provided, and the opening of the filter medium hole can be adjusted in a state in which the filter medium is attached in accordance with the pressure applied by the impeller.
The filter medium can also be used in a strainer. A fixed filter medium and a sliding filter medium are formed into a cylindrical shape, arranged in a strainer filtration tank, divided into a filtration chamber and a treated water chamber, and an operating member suspended in the filtration tank. If the sliding filter medium is slid, the clogged material can be easily removed from the clogged filter medium.

The filter medium of the separation device of the present invention is configured as described above,
a. The filter medium hole composed of a plurality of filter media does not require replacement of the filter media itself as in the prior art, and by arbitrarily shifting the position of the filter media hole, the aperture of any filter media and the area of the opening can be obtained. .
b. By making the opening of the filter medium arbitrarily variable, it is possible to confirm the effect of the filter medium on the secondary side and easily determine the appropriate opening of the filter medium. Opening can be adjusted with the filter medium attached.
c. Since the area of the aperture of the filter medium can be arbitrarily varied within the range of 0 to 100%, an appropriate aperture area of the filter medium can be obtained.
d. There are no restrictions on the manufacturer's existing filter media specifications.

The filter medium of the separation device according to the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 are development views of the filter medium, and a large number of filter medium holes 1a, 2a,. is there. The filter medium 1 shown in FIG. 1, 0.5 to 5 mm ^□ Yes in filtration media pores 1a shape provided toward, the filter medium 2 shown in FIG. 2, the circular filter material hole 2a of 0.5 to 5 mm ^phi It is provided.
3 and 4 are development views of the filter media that are laid on top of each other.
1 and 2, fixed filter media 3, 4 are overlapped with sliding filter media 5, 6 of the same shape, and if one of the stacked sliding filter media 5, 6 is slid, The principle that the areas of the openings 7 and 8 of the filter medium holes 3a, 4a, 5a, and 6a can be arbitrarily varied in the range of 0 to 100% by the phase difference is applied.
In this embodiment, the filter media 1, 2, 3, 4, 5 and 6 are formed in a flat plate shape, but can be used even if formed in a cylindrical shape.

FIG. 5 is a longitudinal sectional view of a filtration chamber of a filter press. The filter press 9 is a pair of concave filters having a filtration bed 10 having a filtrate groove in the center and a peripheral seal surface 11 in the periphery. A filtration chamber 13 is formed by the plates 12 and 12.
A stock solution supply path 14 that communicates with the peripheral seal surface 11 of the filter plate 12 in the front-rear direction and a filtrate discharge port 15 that communicates with the filtration chamber 13 are provided. One filter plate 12 that forms the filtration chamber 13 is provided with a stock solution supply hole 16 that communicates with the filtration chamber 13 and the stock solution supply path 14.
A flat plate-like fixed filter medium 17 is stretched on the filter bed 10 of the filter plate 12, and a sliding filter medium 18 is overlaid on the fixed filter medium 17.

  FIG. 6 is an enlarged view of the filter chamber of the filter press. A U-shaped support frame 19 is fitted inside the peripheral seal surface 11 of the filter plate 12, and the fixed filter medium 17 is attached to the support frame 19. The peripheral edge is fixed and stretched on the filtration bed 10. A sliding filter medium 18 is overlaid on the fixed filter medium 17, and bearing members 20 and 20 provided on the upper and lower end surfaces are supported on a support frame 19, so that the sliding filter medium 18 can be slid left and right.

    FIG. 7 shows an operating member of a filter filter sliding filter medium, in which an adjustment bolt 21 is screwed onto the peripheral seal surface 11 of the filter plate 12, and the tip of the adjustment bolt 21 is a side end surface of the slide filter medium 18. It is in contact with. A scale plate 22 is disposed on the side end surface of the filter plate 4 along the adjustment bolt 21, and an arrow 23 of the adjustment bolt 21 is provided opposite to the scale plate 22. When adjusting the sliding filter medium 18 according to the sludge properties, filtration pressure, etc., the adjustment bolt 21 is rotated to move the sliding filter medium 18, and the phase difference between the fixed filter medium 17 and the sliding filter medium 18 is adjusted. The aperture ratio of the filter medium holes of the fixed filter medium 17 and the sliding filter medium 18 that are provided in an overlapping manner can be seen from the scale plate 22.

  FIG. 8 shows another embodiment of the filter plate forming the filtration chamber. The filter press 24 includes a filter plate 12 in which a fixed filter medium 17 and a sliding filter medium 18 are stretched, and a diaphragm 26 in a core plate 25. A filtration chamber 28 is formed by the diaphragm plate 27. The core plate 25 of the diaphragm plate 27 is provided with a filtrate outlet 29 a communicating with the stock solution supply path 29 and the filtration chamber 28, and a pressure water inlet 30 for pressurizing high-pressure fluid into the back surface of the diaphragm 26. The dehydrated cake in the filtration chamber 28 can be squeezed with the diaphragm plate 27 to perform high pressure dehydration with less cake moisture.

FIG. 9 is a conceptual diagram of the screw press. The screw press 31 has a cylindrical fixed filter medium 34 stretched around an outer cylinder 33 provided with screw blades 32, and is arranged on the outer periphery of the fixed filter medium 34 in the concentration zone A. A cylindrical sliding filter medium 35 is rotatably arranged.
FIG. 10 is a longitudinal sectional view of the concentration zone of the screw press. The adjustment bolt 37 is screwed to the support frame 36 of the outer cylinder 33, and the tip of the adjustment bolt 37 projects from the sliding filter medium 35. It is in contact with the flange 38. A scale plate 39 is disposed on the support frame 36 along the adjustment bolt 37.
The adjustment bolt 37 is rotated to rotate the sliding filter medium 35, the phase difference between the fixed filter medium 34 and the sliding filter medium 35 is adjusted, and the aperture ratio of the filter medium holes of the fixed filter medium 34 and the sliding filter medium 35 to be overlapped is determined. It can be seen from the scale plate 39.

The filter medium hole of the fixed filter medium 34 and the sliding filter medium 35 in the concentration zone A is larger than the filter medium hole of the filtration / dehydration zone B, and if the slide filter medium 35 is rotated, the filter medium is adapted to the change in sludge properties. The aperture ratio of the holes can be adjusted as appropriate within a range of 0 to 100%.
If the filter medium hole of the concentration zone A, which has a large water load and is easily clogged, is opened 100% and the washing water is sprayed onto the peripheral portion of the outer cylinder 33, the filter medium surface can be easily regenerated. Further, when the sliding filter medium 35 is rotated at the end of the operation and the opening of the filter medium hole of the fixed filter medium 34 is fully closed, the inside of the outer cylinder 33 can be cleaned.
Note that the sliding filter medium 35 superimposed on the fixed filter medium 34 of the outer cylinder 33 may be disposed in the filtration / dehydration zone B, or separately disposed in the concentration zone A and the filtration / dehydration zone B, respectively. It may be.

FIG. 11 is a longitudinal sectional view of an essential part of the continuous pressure dehydrator. The continuous pressure dehydrator 40 is provided with an impeller 42 in a filter chamber 41 formed in an annular shape, and driving of the impeller 42. A stock solution supply path 44 is disposed on the shaft 43.
FIG. 12 is a cross-sectional view of a continuous pressure dehydrator,
A fixed filter medium 45 and a sliding filter medium 46 are overlapped on the side wall of the filtration chamber 41, and the stock solution is pressed into the filtration chamber 41 from the shaft core portion of the impeller 42 and captured by the fixed filter medium 45 and the sliding filter medium 46. Scrap the cake with the impeller 42. While stirring and concentrating with the impeller 42, the filtrate is separated, pressed and dehydrated, and the cake is discharged from the outlet 47.
As shown in FIG. 11, an operating rod 51 that protrudes from the outer ring 48 of the filtration chamber 41, has an adjustment bolt 50 screwed to the support frame 49, and has the tip of the adjustment bolt 50 fixed to the sliding filter medium 46. It is in contact with.
Screw the adjustment bolt 50 and press the operating rod 51 at the tip of the adjustment bolt 50,
If the sliding filter medium 46 is rotated, the aperture ratio of the filter medium hole can be adjusted in the range of 0 to 100%, and the aperture ratio and its area are adjusted according to the sludge properties and the internal pressure of the filtration chamber 41. .

FIG. 13 is a longitudinal sectional view of the strainer. The strainer 52 has a fixed filter medium 55 and a sliding filter medium 56 suspended in a cylindrical shape on a horizontal partition wall 54 disposed in the filtration tank 53. The filtration tank 53 is divided into a filtration chamber 57 and a treated water chamber 58.
The fixed filter medium 55 and the sliding filter medium 56 have a large number of filter medium holes opened on the peripheral wall and the bottom surface, and the upper end thereof is opened. The fixed filter medium 55 is fitted to the partition wall 54 at the upper end thereof, and the treated water chamber 58. It hangs down.
The sliding filter medium 56 is slidably disposed inside the fixed filter medium 55, and its upper end is opened to the filtration chamber 57.
An inlet 59 of the filtration chamber 57 and an outlet 60 of the treated water chamber 58 are disposed on the side wall of the filtration tank 53.
An operating rod 62 provided with a handle 61 is suspended from the top wall of the filtration tank 53, and the lower end is fixed to the bottom of the sliding filter medium 56.
If the handle 61 is rotated to adjust the aperture ratio of the filter medium holes of the fixed filter medium 55 and the sliding filter medium 56 according to the type of solid substances such as dust and earth and sand contained in the raw water, it is not necessary to replace the filter medium. The opening rate of the filter medium hole according to the properties of the raw water can be obtained. When clogged, the filter medium can be easily regenerated by backwashing with a known means with an aperture ratio of 100%.

The filter medium of the separation device according to the present invention can adjust the size of the opening of the opening of the filter medium and the area of the degree of opening arbitrarily arranged in the filtration chamber, so that the opening can be adjusted according to the sludge properties. It becomes.
Therefore, the filter medium is suitable for separation devices such as sorting of solids, separation of solids from gas, concentration of solids in liquid, and filtration dehydration.

It is an expanded view of the filter medium of the separation device concerning this invention. Similarly, it is an expanded view of the filter medium of another Example. Similarly, it is a development view of the filter medium that has been installed. Similarly, it is an expanded view of the filter medium which overlapped of the other Example. Similarly, it is a longitudinal cross-sectional view of a filtration chamber of a filter press. Similarly, it is an enlarged view of the filtration chamber of a filter press. Similarly, it is the principal part enlarged view of the action | operation member of the sliding filter medium arrange | positioned in the filter press. Similarly, it is the longitudinal cross-sectional view of the filtration chamber of the filter press of another Example. Similarly, it is a conceptual diagram of a screw press. Similarly, it is a principal part enlarged view of the action | operation member of the sliding filter medium arrange | positioned at the screw press. Similarly, it is a principal part longitudinal cross-sectional view of a continuous pressure dehydrator. Similarly, it is a principal part cross-sectional view of a continuous pressure dehydrator. Similarly, it is a longitudinal cross-sectional view of a strainer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Filter medium 1a, 2a Filter medium hole 3, 4, 17, 34 Fixed filter medium 5, 6, 18, 35, 46, 56 Sliding filter medium 7, 8 Opening part 9, 24 Filter press 10 Filtration bed 11 Circumferential seal surface 12 Filter plate 21, 37, 50, 62 Actuating member 31 Screw press 33 Outer cylinder 36 Support frame 40 Continuous pressure dehydrator 42 Impeller 41, 57 Filtration chamber 48 Outer ring 52 Strainer 53 Filtration tank 58 Treatment water chamber

Claims (6)

In the filter medium stretched in the filtration chamber of the separation device, a plurality of relatively slidable filter media (1, 2...) Are overlapped, and the filter medium holes (1a, A filter medium for a separation device, wherein the aperture ratio of 2a) is adjustable. The above-mentioned superposed filter medium is composed of a fixed filter medium (3, 4) and a sliding filter medium (5, 6), and the sliding filter medium (5, 6) is slid to adjust the openings (7, 8). The filter medium of the separation device according to claim 1, wherein the filter medium is made possible. The fixed filter medium and the sliding filter medium are stretched on the filter bed (10) of the filter plate (12) disposed in the filter press (9, 24), and the peripheral seal surface (11) of the filter plate (12) is provided. A side end portion of the sliding filter medium (18) is pressed by the penetrating operation member (21) to adjust the aperture ratio of the filtration holes of the fixed filter medium (17) and the sliding filter medium (18). The filter medium of the separation device according to claim 2. The fixed filter medium is stretched on the outer cylinder (33) of the screw press (31), and the cylindrical sliding filter medium (35) is overlapped at an appropriate position of the fixed filter medium (34) to support the outer cylinder (33). The filter medium of the separation device according to claim 2, wherein an operating member (37) of the sliding filter medium (35) is disposed on the frame (36). The fixed filter medium and the sliding filter medium are stretched on the side wall of an annular filtration chamber (41) provided with the impeller (42) of the continuous pressure dehydrator (40), and the outer ring of the filtration chamber (41) The filter medium of the separation device according to claim 2, wherein an operating member (50) of the sliding filter medium (46) is disposed in (48). The fixed filter medium and the sliding filter medium are formed in a cylindrical shape, arranged in a filter tank (53) of a strainer (52), divided into a filter chamber (57) and a treated water chamber (58), and a filter tank (53). The filter medium of the separation device according to claim 2, wherein the operating member (62) suspended from the filter medium is fixed to the sliding filter medium (56).

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