JP3318461B2 - Filtration machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for dewatering a liquid component from an object to be filtered comprising a mixture of a liquid and a solid, and more particularly to a filter having a substantially cylindrical shape formed by a filter medium.
In the medium with continuous compressed about a screw press called filter machine dehydrating liquid component from the filter body.

[0002]

2. Description of the Related Art In general, an object to be filtered, which is a slurry such as excess sludge, coagulated sludge, or flotation scum, or a mixture of liquid and solid called sludge, is filtered to a predetermined size or more. Various filtration machines that separate into solid filter cake and filtrate filtered by filtration are used to separate domestic wastewater or various industrial wastewater from human waste treatment plants, sewage treatment plants, machine factories, chemical factories, food factories, etc. It is frequently used for such purposes.

[0003] As such a conventional filter, a filter called a screw press is known. The screw press includes a filter tube (a dewatering tube) made of a filter material having a cylindrical sieve surface made of a punching metal or the like having a large number of through holes of an appropriate size, and an appropriate spiral inside the filter tube. A filtration tube is configured by gradually and continuously compressing the object to be filtered supplied inside the filtration tube while moving the inside of the filtration tube in the axial direction with a spiral conveyor. Dewatering (separation) of liquid components from the object to be filtered with the sieve surface of the filter medium to be filtered
Then, it separates (solid-liquid separation) into a solid filter cake called a dewatered cake and a filtrate called a squeezed liquid filtered by filtration.

[0004]

[SUMMARY OF THE INVENTION However, in the conventional filtration device described above can not prevent clogging of the sieve surface of the filter medium, when cleaning the filter medium, since the filter medium is fixed work In particular, there is a problem that a large amount of labor and time are required for cleaning the portion located on the discharge side of the filter cake where a high pressure is applied to the object to be filtered.

[0005] In the conventional filtration device, the sieve surface of the filter medium formed into a cylindrical shape by punching metal or the like, dehydrating the liquid component from the filter medium is supplied to the inside of the filtration tube, solid cake of And the filtrate filtered by filtration, but when the size of the solid contained in the object to be filtered fluctuates, or when the object to be filtered is dehydrated in the morning and afternoon during the day In the case of dehydration of a filter to be performed depending on the season, the size of the solid separated from the filter cannot be changed because the filter medium cannot be easily replaced. However, there is a problem that only a plurality of filters having filter media having different sieves (mesh) on a sieve surface are used or separation performance is sacrificed.

Further, when a demonstration or a performance test of a filter is performed at a customer, it is impossible to prepare a large number of test machines ( filters ) in advance because of a large storage space and an economic burden. , Limited number, usually 1
Demonstrations or performance tests must be performed on an unspecified number of types of media to be filtered using a single filter , and as described above, the filter media of the filter cannot be easily replaced. It was difficult to make the filter body and the filter medium of the test machine correspond to the optimum state, and there was a problem that the original performance of the filter machine could not be exhibited.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems in the conventional art, and has as its first object to provide a filter capable of facilitating cleaning. It is a second object of the present invention to provide a filter capable of coping with a body with one filter medium.

[0008]

According to a first aspect of the present invention, there is provided a filter according to the present invention, wherein a plurality of annular ring plates are alternately shifted in a circumferential direction.
And the same position in the circumferential direction
The filter body comprising a mixture of substantially liquid supplied to the interior is formed in a cylindrical shape and the solid gap forming member disposed therebetween for each two ring plates vicinal comprising, as a whole are A filter tube that separates the filter material into a filter cake and a filtrate, and a fine gap through which the filtrate passes between each of two adjacent ring plates that constitute the filter medium when the object to be filtered is dewatered. When the filter medium is closed so as to form the filter medium and the filter medium is washed, the filter medium is opened so that each of two ring plates adjacent to the filter medium can be separated via a gap forming member. A filter medium opening / closing means for moving each ring plate and the gap forming member in the axial direction of the filter tube so as to bring the state into a state is provided.

[0009]

[0010]

[0011]

[0012]

SUMMARY OF According to the filtration apparatus of the present invention according to claim 1, the filter medium switching means, when performing dehydration of the filter body, a plurality of annular ring plate and the gap forming member in the axial direction of the filtration tube In the case where the filter medium is closed to form a fine gap through which the filtrate passes between the two adjacent ring plates and the filter medium is washed, a plurality of annular ring plates and a gap forming member are formed. Can move in the axial direction of the filter cylinder, and each ring plate and the gap forming member can be in an open state separated from each other, so that the filter medium can be easily washed.

[0013]

[0014]

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a schematic configuration of a first embodiment of a filter according to the present invention. FIG. 1 is a front view showing a main part, and FIG. It is a top view.

First, a schematic configuration of the filter of the present embodiment will be described.

As shown in FIG. 1 and FIG.
The filter 1 has a pedestal 2 formed of a rigid material such as a metal in a substantially rectangular shape in a plane, and a leveling unit for adjusting the level of the filter 1 and absorbing vibration is provided below the pedestal 2. A desired number of mounts 3 and wheels 4 that allow the filter 1 to move are arranged at appropriate positions, for example, at four corners.

A filtrate receiver 5 is provided above the gantry 2. The filtrate receiver 5 includes a filtration tube 6 described later.
1 to collect a filtrate E, which is referred to as a squeezed liquid or the like, which is discharged from the outer peripheral surface of the filter tube 6 to the outside and falls, and is a longitudinal direction shown in the horizontal direction in FIG. Are formed over most of the central portion of the.
A filtrate outlet 8 is provided at a position lower than the upper surface of the gantry 2 at a substantially central portion of the filtrate receiver 5 in a plane.
Can be sent out to a recovery tank (not shown).

On the left side of the upper surface of the gantry 2 in FIG. 1, a storage container 9 for storing a solid filter cake K called a dewatered cake discharged in the axial direction from the inside of the filter tube 6 is provided. At a desired position of the gantry 2, a control panel (both not shown) having various operation switches and the like is provided.

Above the gantry 2, a filtration tube (dehydration tube)
6 are provided. The filter cylinder 6 is formed in, for example, a substantially cylindrical shape having an inner diameter of about 200 mm, dewaters the liquid from the filter target S, and converts the filter target S into a solid filter mass K.
And the filtrate E filtered by filtration (solid-liquid separation)
It is possible to do. 1 and 2 on the right side of FIG. 1 and FIG. 2 is a supply side IS to which the filtered object S is supplied, and the other end of the filter cylinder 6 on the left side in FIG. 1 and FIG. The side is a discharge side OS from which the dewatered filter cake K is discharged.

An input hopper 10 having an open upper portion for supplying the object to be filtered S to the inside of the filtration tube 6 is attached to an end face of the supply side IS of the filtration tube 6.

The filter cylinder 6 and the loading hopper 10 are parallel to the upper surface of the gantry 2 by a plurality of support members 11 erected on the upper portion of the gantry 2 and in the horizontal direction in FIGS. 1 and 2. Are supported such that the axial direction of the filter tube 6 extends parallel to the longitudinal direction of the filter tube 6.

Inside the filter cylinder 6 and the charging hopper 10, the filtration target S supplied from above the charging hopper 10 is provided.
1 and 2, a spiral conveyor 12 is provided as a transfer means for transferring while gradually pressurizing (transferring pressure) while moving the inside of the filter tube 6 in the axial direction from right to left in FIGS. Has been established. At both ends of the spiral conveyor 12, journal portions 13 each having a diameter smaller than the outer diameter of the spiral conveyor 12 are provided. The journal 13a disposed at the right end of the spiral conveyor 12 shown on the right side in FIGS. 1 and 2 protrudes from the charging hopper 10 for the most part in the length direction. , Gear 14 is attached. The gear 14 is connected to and supported by a speed reducer 15 such as a worm speed reducer, which is disposed above the gantry 2 located to the right of the loading hopper 10. Also,
1 and 2 of the spiral conveyor 12 has a journal portion 13b disposed on the left end shown on the left side, and most of the lengthwise direction of the journal portion 13b protrudes from the filtration tube 6, and the tip thereof is
The upper surface of the gantry 2 is rotatably supported by a support member 11 located near the left end in the longitudinal direction (discharge side OS).

A driven sprocket 16 is attached to the input shaft 15a of the speed reducer 15. A drive motor 17 is provided near the right end of the upper surface of the gantry 2, and a drive sprocket 18 is attached to an output shaft 17 a of the drive motor 17. And the speed reducer 15
An endless roller chain 19 is wound so that the driven sprocket 16 attached to the input shaft 15a and the driving sprocket 18 attached to the output shaft 17a of the driving motor 17 come into contact with the respective outer peripheral surfaces. Has been turned. That is, the driving force of the driving motor 17 is transmitted to the spiral conveyor 12 via the speed reducer 15 and the filtering target S supplied from the upper part of the charging hopper 10 is moved from right to left in FIGS. 1 and 2. It is rotatable so that it is gradually pressurized while being transferred.

Next, a description will be given of a schematic configuration of a filtration tube 6 of the filter 1 of the present embodiment.

As shown in FIGS. 1 and 2, the filter tube 6 of the present embodiment is located on the supply side IS (the side of the input hopper 10) and is formed of the same filter material 7 as the conventional filter tube 6A.
And a rear filter cylinder 6B having a filter medium 20 to which the present invention is applied, which is located on the discharge side OS (to the left of the front filter cylinder 6).

Next, the front filter cylinder 6A of this embodiment will be described in detail with reference to FIGS.

As shown in FIGS. 1 and 2, the front filter cylinder 6A of this embodiment is moved from the supply side IS to the discharge side OS (from right to left in FIGS. 1 and 2) by the spiral conveyor 12. This is for dewatering the object to be filtered S which is transported under pressure by gravity filtration, and a cylindrical sieve surface (not shown) is formed by punching metal or the like having a large number of through holes of an appropriate size. Filter media 7 as before
have. Flange members 21 are attached to both ends in the axial direction of the filter medium 7. And the flange member 2
The inner diameter of 1 is substantially the same as or slightly larger than the inner diameter of the filter medium 7, and the outer diameter of the flange member 21 is formed larger than the outer diameter of the filter medium 7. Further, one flange member 21 located on the supply side IS
The other flange member 21 attached to the input hopper 10 by bolts or the like (not shown) and located on the discharge side OS.
Has an inner hole 21a having an inner diameter substantially the same as the inner diameter of the filter medium 7 of the front filter cylinder 6A. This discharge side OS
The other flange member 21 located in the front filter cylinder 6A
Bore 2 having an inner diameter substantially the same as the inner diameter of the filter medium 7 of FIG.
The respective axes are supported by a support member 11 located at a substantially central portion in the longitudinal direction of the gantry 2 via a mounting member 22 having 2a (see FIG. 3).

As shown in FIGS. 1 and 2, between the two flange members 21, a plurality of rod-shaped reinforcing members 23 for preventing deformation of the filter medium 7 are in contact with the outer peripheral surface of the filter medium 7. It is arranged. In addition, on the outer peripheral surface of the filter medium 7,
If necessary, an annular reinforcing ring (not shown) may be provided, and is not particularly limited to the configuration of the present embodiment.

Next, the rear filter cylinder 6B of this embodiment will be described in more detail with reference to FIGS.

FIG. 3 is a partially cutaway plan view showing a main part of a rear filter tube of the filter according to the present invention, FIG. 4 is a plan view showing a ring plate, and FIG. 5 is a main part of the rear filter tube. FIG.

The rear filtration cylinder 6B filtration apparatus 1 of the present embodiment to which the present invention is applied, as shown in FIG. 3, right by the spiral conveyor 12, in FIG. 3 from the discharge side OS (Fig. 1 from the supply side IS From the left side to the left side) for further high-pressure dehydration of the filtration object S subjected to the pressure transfer from the left side to the left side and gravity-filtered by the front filtration cylinder 6A. And a filter medium 20 formed in a substantially cylindrical shape. Each ring plate 24 constituting the filter medium 20 is formed of a rigid material such as a metal, for example, in an annular shape having a thickness of about 3 mm.
Are substantially the same as the inner diameter of the filter medium 7 of FIG. As shown in FIG. 4, six mounting holes 25 are arranged in each ring plate 24 at equal distances from the axis of the ring plate 24 so as to penetrate in the thickness direction. . The axis of the mounting hole 25 is the ring plate 2
4 is located radially outward from the outer peripheral surface of the outer surface 4. As shown in detail in FIG. 5, each mounting hole 25 of the ring plate 24 is fitted to the outer peripheral surface of six fixed rods 26 (only a part is shown) so as to be movable in the axial direction. The ring plate 24 is supported so that the axis thereof is the same as the axis of the filter medium 7 of the front filter cylinder 6.

As shown in FIGS. 4 and 5, a storage recess 43 is formed in the ring plate 24 at a position where each of the mounting holes 25 is formed, in which a disc spring 28 constituting a gap forming member 27 described later can be stored. It is formed coaxially with the mounting hole 25. The housing recess 43, in this embodiment, are formed on both sides of the ring plate 24, the depth of the housing recess 43 is 1/2 or more of the thickness of the disc spring 28.
As the storage recess 43, a recess slightly deeper than the thickness of the disc spring 28 may be formed on one of the surfaces of the ring plate 24.
The configuration is not particularly limited to the configuration of the present embodiment as long as the configuration allows close contact between them.

A gap forming member 27 for forming a desired gap G between the ring plates 24 adjacent to each other is fixed to each of the fixed rods 26. In this embodiment, the gap forming member 27 is formed by an annular disc spring 28 as an elastic body. The disc spring 28 is extendable and contractible in the axial direction. Even when the disc spring 28 is most compressed, the outer peripheral surface of the disc spring 28 is located in the storage recess 43 and the inner hole 24a of each ring plate 24 is formed. Those located on the outer side in the circumferential direction are used.

A disc spring 28 as an elastic body is provided between a front movable plate 29 described later and a ring plate 24 adjacent to the front movable plate 29, and a rear movable plate 30 described later.
It is also preferable to dispose it between the ring plate 24 and the ring plate 24 adjacent to the rear movable plate 30 from the viewpoint of cleaning. In this case, the disc spring 28 of the front movable plate 29 and the rear movable plate 30 A storage portion (not shown) similar to the storage recess 43 may be provided at a position facing the storage recess 43.

Further, as the gap forming member 27,
It is not limited to the disc spring 28, but may be selected from various types that can expand and contract in the axial direction, such as a compression coil spring and a wave washer (not shown).

As shown in FIGS. 3 and 5, the front end of the fixed rod 26 located on the supply side IS is attached to the mounting member 22 to which the flange member 21 located on the discharge side OS of the front filter cylinder 6A is attached. The rear end of the fixed rod 26, which is located on the discharge side OS, is fixed to the support member 11 that supports the journal 13b disposed at the left end of the spiral conveyor 12, as shown in FIG. ing.

A front movable plate 29 is provided on an end face of the filter medium 20 located on the supply side IS, and a rear movable plate 30 is provided on an end face of the filter medium 20 located on the discharge side OS. I have. The front movable plate 29 and the rear movable plate 30
As shown in detail in FIG.
a and the inner hole 2 penetrating in the same thickness direction as the mounting hole 25
9a, 30a and mounting holes 29b, 30b through which the respective fixing rods 26 are inserted.
Are arranged so as to oppose each other via an inner surface, and are movable in the axial direction on the outer peripheral surface of each fixed rod 26.

As shown in detail in FIG. 3, two annular guide rings 31 are attached to the end face of the OS on the discharge side of the rear movable plate 30 so as not to interfere with the fixed rods 26. The guide ring 31 is formed by the filter mass K passing through the filter medium 20.
Is guided along the outer peripheral surface of the spiral conveyor 12 to a predetermined discharge position, and has an inner hole 31a of the same size as the inner hole 30a of the rear movable plate 30,
It is arranged so that its axis coincides with the axis of the inner hole 30 a of the rear movable plate 30.

At the end of the end surface of the rear movable plate 30 in the direction perpendicular to the longitudinal direction of the gantry 2 on the end surface of the OS on the discharge side,
For example, a pair of auxiliary reciprocating cylinders 32 which can be driven by hydraulic pressure is attached so that its output shaft 32a extends in parallel with the fixed rod 26, and the tip of the output shaft 32a is attached to the front movable plate 29. It is attached to. The auxiliary reciprocating cylinder 32 can always contact the front movable plate 29 so as to be in close contact with the mounting member 22 to which the flange member 21 located on the discharge side OS of the front filter cylinder 6 is attached. ing. The auxiliary reciprocating cylinder 32 has an output shaft 32.
It is preferable to have a lock mechanism capable of fixing the position a.

A support member 11 (right side in FIG. 3) for supporting a mounting member 22 to which a flange member 21 located on the discharge side OS of the front filter cylinder 6A is attached, and a left end of the spiral conveyor 12 are arranged. A pair of guide rods 33 extending in parallel with the fixed rod 26 is disposed between the support member 11 (left side in FIG. 3) supporting the provided journal portion 13b. The guide rod 33 is attached to the front movable plate 29.
As shown in the upper and lower portions of FIG. 3, the upper and lower portions are located outside the fixed rod 26 and inside the auxiliary reciprocating cylinder 32 so as to penetrate the rear movable plate 30. On the outer peripheral surface of each guide rod 33, a slide ring 34 formed in a substantially cylindrical shape that slides on the outer peripheral surface of the guide rod 33 in the axial direction is provided. One end of the slide ring 34 located on the supply side IS is fixed to the rear movable plate 30, and the other end located on the discharge side OS of the slide ring 34 is disposed on the left end of the spiral conveyor 12. Support member 11 supporting journal portion 13b
And the rear movable plate 30.

At the other end of the sliding ring 34 located on the discharge side OS, a connecting plate 35 connecting the end faces of the sliding rings 34 is arranged so as not to interfere with the fixed rod 26 and the journal portion 13b of the spiral conveyor 12. Has been attached. In the vicinity of both ends of the OS on the discharge side of the connecting plate 35 shown in the vertical direction in FIG. 3, the support member 11 supporting the journal portion 13b disposed on the left end of the spiral conveyor 12 is attached. The output shaft 36a of the pair of main reciprocating cylinders 36 is attached (only one is shown below in FIG. 3). The main reciprocating cylinder 36 can be driven by, for example, hydraulic pressure, and its output shaft 3
It is preferable to have a lock mechanism capable of fixing the position of 6a.

The front movable plate 29 and the rear movable plate 30 can be separated from each other by moving the output shafts 36a and 32a of the main reciprocating cylinder 36 and the auxiliary reciprocating cylinder 32 forward and backward. Each ring plate 24 constituting the filter medium 20 disposed between the front movable plate 29 and the rear movable plate 30 can be moved in the axial direction of the rear filter cylinder 6B to open and close, and the main reciprocating motion Each output shaft 36 of the cylinder 36 and the auxiliary reciprocating cylinder 32
a, 32a to control the position of the front movable plate 2.
The distance L between the rear movable plate 9 and the rear movable plate 30 can be controlled, whereby each of the two ring plates 24 constituting the filter medium 20 disposed between the front movable plate 29 and the rear movable plate 30 can be controlled. Can be controlled (variable) in cooperation with the elastic force of the disc spring 28.

That is, in the present embodiment, the main reciprocating cylinder 36, the auxiliary reciprocating cylinder 32, the front movable plate 29 and the rear movable plate 30, each of the two ring plates 24 and the gap A filter medium opening / closing means 37 for performing opening and closing operations by moving a disc spring 28 as a forming member in the axial direction of the rear filter cylinder 6B, and the mutual ring plates 24 in a closed state of each of the two ring plates 24 constituting the filter medium 20 It has a configuration having both functions of the gap adjusting means 38 that makes the gap G between them adjustable.

The filter medium opening / closing means 37 has a fine gap G through which the filtrate E passes between the ring plates 24 constituting the filter medium 20 in a dewatering operation state in which the medium S can be dewatered. The filter medium 20 is closed so that the filter medium 20 is formed, and the filter medium 20 is opened so that at least the gap G between the ring plates 24 constituting the filter medium 20 is increased in a cleaning state in which the filter medium 20 can be washed. The configuration may be any, and is not particularly limited to the configuration of the present embodiment.

The space adjusting means 38 may be any structure as long as the space G between the ring plates 24 constituting the filter medium 20 can be adjusted in a dehydrated state, and is particularly limited to the structure of this embodiment. It is not something to be done.

Further, the drive source for bringing the front movable plate 29 and the rear movable plate 30 into and out of contact with each other is not limited to the reciprocating cylinders such as the main reciprocating cylinder 36 and the auxiliary reciprocating cylinder 32. For example, a combination of a drive motor and a gear (not shown) may be used, and various combinations can be selected.

A pair of support stays 39 extending in parallel with the guide rods 33 are disposed between the connecting plate 35 and the rear movable plate 30, and a substantially central portion of the support stay 39 in the axial direction is provided. The stay connecting plate 40 connecting the support stays 39 includes the fixed rod 26 and the spiral conveyor 1.
It is attached so as not to interfere with the second journal portion 13b. A discharge ring 41 is attached to an end surface of the stay support plate 40 on the supply side IS. The discharge ring 41 has an inner hole 41 a that can be fitted to the outer peripheral surface of the discharge side OS of the spiral conveyor 12, and the outer surface of the spiral conveyor 12 and the guide ring 31 Inclined surface 41b for discharging in the circumferential direction the filter cake K that has passed in the axial direction between the inner hole 31a
Are formed.

That is, in the present embodiment, by driving the main reciprocating cylinder 36, the rear movable plate 30 and the discharge ring 41 are operated in conjunction with each other.

[0051] As the filtration tube 6 of the filter 1 of the present embodiment may be configured comprising only the rear filtration cylinder 6B to which the present invention is applied, particularly, limited to the configuration of the filtration tube 6 of this embodiment It is not something to be done.

Next, the operation of the rear filter cylinder 6B of the present embodiment having the above-described configuration will be described.

FIGS. 1 to 5 show a stand-by state in which a dehydration operation capable of dehydrating the object to be filtered is possible.

As shown in FIG. 2 and FIG.
In the standby state in which dehydration of the auxiliary reciprocating cylinder 32 is performed, the output shaft 32a of the auxiliary reciprocating cylinder 32 is locked in the retracted state located at the retracted position.
Front movable plate 29 to which the tip of the second output shaft 32a is attached
Is in contact with the mounting member 22 to which the flange member 21 located on the discharge side OS of the front filter cylinder 6 is attached.

The output shaft 36 of the main reciprocating cylinder 36
a, which is locked in the forward state located at the forward position, moves the rear movable plate 30 operating in conjunction with the output shaft 36a of the main reciprocating cylinder 36 so as to approach the front movable plate 29, and Each of the ring plates constituting the filter medium 20 disposed between the front movable plate 29 and the rear movable plate 30 while maintaining a predetermined distance L between the movable portion 29 and the rear movable plate 30. 24 and the disc springs 28 are brought into contact with each other to close the filter medium 20 and to form a fine gap G through which the filtrate E passes between the two ring plates 24 adjacent to each other. It has been like that. The gap G between the ring plates 24 can be adjusted by controlling the advance position of the output shaft 36a of the main reciprocating cylinder 36.

The guide ring 31 and the discharge ring 4
Numeral 1 is positioned so as to face the outer peripheral surface near the discharge end of the spiral conveyor 12 in conjunction with the operation of the output shaft 36a of the main reciprocating cylinder 36.

Next, adjustment of the gap G between the ring plates 24 constituting the filter medium 20 will be further described.

In this embodiment, the main reciprocating cylinder 3
6 is positioned at the most advanced end of the output shaft 36a, the disc spring 28 is pressed against the spring force (elastic force) of the disc spring 28 disposed between the ring plates 24. The disk spring 28 is most compressed in the thickness direction, and the disc spring 28 is stored in the storage recess 43 provided in the ring plate 24, and the two ring plates 24 adjacent to each other can be brought into close contact with each other. FIG. 6 shows a state where the two adjacent ring plates 24 are in close contact with each other.

The output shaft 36 of the main reciprocating cylinder 36
a is not located at the forward end, the gap forming member 27
By means of the spring force of the disc spring 28, a gap GC (G = DC) of an arbitrary size having a substantially uniform size can be formed between the two ring plates 24. The maximum value of the gap G between the two ring plates 24 is limited by the height of the disc spring 28 in the free state, and the adjustment range of the gap G is determined by the spring force of the disc spring 28 and the disc force. It is determined by the amount of expansion and contraction (deformation) of the spring 28 in the axial direction. FIG. 7 shows a closed state in which the two ring plates 24 are separated from each other.

That is, according to the rear filter cylinder 6B of this embodiment, unlike the conventional filter cylinder, the position of the output shaft 36a of the main reciprocating cylinder 36 which forms part of the filter medium opening / closing means 37 and the interval adjusting means 38 is controlled. Accordingly, the gap G between each two adjacent ring plates 24 in the closed state of each ring plate 24 constituting the filter medium 20 is made corresponding to the size of the solid contained in the filter medium S. Can be adjusted (variable), so that the dewatering of the object to be filtered S can be optimized, and one filter medium 20 can be used for a wide variety of objects to be filtered S.

The adjustment of the gap G between the ring plates 24 in the closed state by the main reciprocating cylinder 36 constituting a part of the interval adjusting means 38 is adjusted in advance in accordance with the material S to be filtered. Alternatively, it may be adjusted while the filter 1 is in operation, and can be selected according to the use situation.

Next, the dehydration of the filter S by the filter 1 of the present embodiment will be described.

When the filter 1 of this embodiment is operated, the driving force of the drive motor 17 is transmitted to the spiral conveyor 12 via the speed reducer 15, and the spiral conveyor 12 starts rotating at a desired rotation speed. Then, a desired material S to be filtered is supplied from above the charging hopper 10 shown on the right side in FIG. Then, the filtered object S is gradually pressurized (pressurized movement) and passes through the inside of the filter tube 6 along the surface of the spiral conveyor 12 while being transferred from right to left in FIGS. 1 and 2. . And the object S to be filtered is
During the passage through the front filter cylinder 6A having the same filter medium 7 as the conventional one located on the supply side IS, gravity filtration is performed by the filter surface 7 (not shown) of the filter medium 7 of the front filter cylinder 6A to concentrate.

Next, the concentrated filter medium S is closed by the filter medium opening / closing means 37 and the gap adjusting means 38 of the rear filter cylinder 6B located on the discharge side OS in accordance with the size of the solid of the filter medium S. Filter medium 2 with adjusted spacing G in
During the passage toward the discharge side OS while being gradually pressurized inside each of the ring plates 24 constituting the liquid crystal layer 0, the liquid component is dehydrated due to a volume change, and a dewatered cake L called a dehydration cake is formed. After being guided to the discharge position by the guide ring 31, it is dropped toward the upper surface of the gantry 2 by the inclined surface 41 b of the discharge ring 41, and then stored in the storage container 9.

The filtrate E, which is a liquid component separated from the body S to be filtered by the filter cylinder 6, passes from the inside of the filter cylinder 6 toward the surface, and then from the outer peripheral surface of the filter cylinder 6 to the upper surface of the gantry 2. , And is sent out to a not-shown recovery tank or the like via a filtrate discharge port 8.

Next, it will be described with reference to FIG 8 for cleaning the filtration tube 6 in the filtration apparatus 1 of the present embodiment. Incidentally, the front filtering cylinder constituting a part of the filtration tube 6 of the filter 1 of the present embodiment 6
A is used for gravity filtration of the filtration object S, there is almost no clogging of the filter medium 7 of the front filter cylinder 6A, and the filter medium 7 can be easily washed. The washing of the filter medium 7 is omitted, and the rear filter cylinder 6B
Only the cleaning of 0 will be described.

FIG. 8 is a view similar to FIG. 3, illustrating the state of washing the filter medium of the rear filter cylinder.

[0068] As shown in FIG. 8, in a cleaning state cleaning is possible of the filter medium 20 of the rear filtration cylinder 6B filtration apparatus 1 of the present embodiment constitutes a part of the filter medium switching means 37 and gap adjusting means 38 Output shaft 32a of auxiliary reciprocating cylinder 32
Is locked in the forward state located at the forward position,
The front movable plate 29 to which the tip of the output shaft 32a of the auxiliary reciprocating cylinder 32 is attached is in close contact with the mounting member 22 to which the flange member 21 located on the discharge side OS of the front filter cylinder 6A is attached. Is in contact with

The output shaft 36a of the main reciprocating cylinder 36, which forms a part of the filter medium opening / closing means 37 and the interval adjusting means 38, is locked in the retreating position located at the retreating position. The rear movable plate 30 which operates in conjunction with the output shaft 36a is moved so as to be largely separated from the front movable plate 29 (L = Lmax), and the front movable plate 29 is moved.
Each of the ring plates 24 and each of the disc springs 28 constituting the filter medium 20 disposed between the filter medium 20 and the rear movable plate 30 are separated from each other to open the filter medium 20. Further, the guide ring 31 and the discharge ring 41 are linked to the output shaft 36a of the main reciprocating cylinder 36,
Is located on the discharge side OS from the left end of the.

[0070] That is, in the cleaning state cleaning is possible of the filter medium 20 of the rear filtration cylinder 6B filtration apparatus 1 of this embodiment,
By operating the filter medium opening / closing means 37 to increase the separation distance L between the front movable plate 29 and the rear movable plate 30, the filter material 20 of the rear filter cylinder 6B can be formed without disassembling the rear filter cylinder 6B. Ring plate 24 and each disc spring 2
8 can be made to be in a state of being displaced in the axial direction while being supported by each fixed rod 26. Therefore, unlike the related art, it is easy to wash when the filter medium 20 of the rear filter cylinder 6B is clogged. Thus, the cleaning workability can be reliably improved, and the labor and time required for the cleaning work can be surely reduced.

Further, according to the filtration apparatus 1 of the present embodiment, it locks the output shaft 32a of the auxiliary reciprocating cylinder 32 constituting a part of the filter medium switching means 37 and gap adjusting means 38 in retracted state to the retracted position At the same time, by locking the output shaft 36a of the main reciprocating cylinder 36 in the retracted state located at the retracted position, only the filter medium 20 of the rear filter cylinder 6B is maintained while the filter medium 20 of the rear filter cylinder 6B is kept closed. Is moved to the discharge side OS, and a part of the spiral conveyor 12 surrounded by the rear filtration tube 6B can be exposed to the outside, so that the spiral conveyor 12 can be easily cleaned. FIG. 9 shows a screw cleaning state in which the spiral conveyor 12 can be cleaned.

[0072] Furthermore, according to the filtration apparatus 1 of the present embodiment, each of the output shaft 32a of the auxiliary reciprocating cylinder 32 and the main reciprocating cylinder 36 constituting a part of the filter medium switching means 37 and gap adjusting means 38, By operating the cleaning unit 36a so that the cleaning state shown in FIG. 8 and the screw cleaning state shown in FIG. 9 are alternately repeated, the filter mass K which is firmly set at the end of the discharge side OS of the spiral conveyor 12 is formed.
Can be easily unraveled.

Therefore, in the filter 1 of the present embodiment, unlike the related art, cleaning can be easily performed without disassembly, and a large amount of labor and time required for cleaning can be surely reduced. At the same time, the gap G between the ring plates 24 constituting the filter medium 20 of the rear filter cylinder 6B in the closed state can be made adjustable (variable), so that one filter medium 20 can be variously filtered. Can be optimized for

FIGS. 10 to 12 show a second embodiment of a filter according to the present invention. FIG. 10 is a plan view showing a ring plate constituting a filter medium of a rear filter cylinder.
1 is an explanatory view of the arrangement state of the ring plate as viewed from the axial direction, and FIG. 12 is a longitudinal sectional view along the line AA in FIG.

In the present embodiment, the storage recess 43 is not formed in each ring plate 24A constituting the filter medium 20A. As shown in FIG. 10, three ring plates 24A penetrate in the plate thickness direction. The mounting hole 25a is the ring plate 24
They are arranged at equal distances from the axis of A and at equal angles. The ring plate 24A, as shown in FIGS. 11 and 12, the position of the mounting holes 25a of the two ring plates 24A to coordinating next to each other with respect to the six fixation rod 26
The mounting holes 25 are arranged so as to be alternately stacked with a difference of 60 degrees in the circumferential direction, and the mounting holes 25 in the circumferential direction.
In the case where a is located at the same position, a disc spring 28 as an elastic body constituting a gap forming member 27 is disposed between each two adjacent ring plates 24A,
Thereby, each two ring plates 2 adjacent to each other
4A is formed so as to be able to adhere. Other configurations are the same as those of the first embodiment.

With this configuration, this embodiment can provide the same effects as those of the first embodiment.

The present invention is not limited to the above embodiment, but can be modified as required.

[0078]

According Effect of the Invention] As described above filtration apparatus of the present invention, it is possible to facilitate the cleaning of the filter medium,
An extremely excellent effect is obtained that one filter medium can be used for various kinds of objects to be filtered.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of a general configuration of a first embodiment of a filter according to the present invention in a standby state.

FIG. 2 is a partially cut-away plan view showing a main part of the overall configuration of the first embodiment of the filter according to the present invention in a standby state.

FIG. 3 is a partially cut-away enlarged view showing the vicinity of a rear filter cylinder in a standby state of the first embodiment of the filter according to the present invention.

Plan view of a ring plate that constitutes the filter medium of the rear filtration tube in the standby state of the first embodiment of filtration apparatus according to the present invention; FIG

FIG. 5 is an explanatory view showing a configuration of a rear filter cylinder in a standby state of the first embodiment of the filter according to the present invention.

FIG. 6 is an explanatory diagram showing a state in which each ring plate is in close contact with the filter medium of the rear filter cylinder in the closed state of the first embodiment of the filter according to the present invention.

FIG. 7 is an explanatory diagram showing a closed state of the filter medium in which the gap between the ring plates is controlled in a closed state of the filter medium of the rear filter cylinder of the first embodiment of the filter according to the present invention;

FIG. 8 is a view similar to FIG. 3, illustrating a cleaning state of a rear filter tube of the first embodiment of the filter according to the present invention;

FIG. 9 is a view similar to FIG. 3, illustrating the state of screw washing of the rear filter tube of the first embodiment of the filter according to the present invention.

Plan view of a ring plate that constitutes the filter medium of the rear filtration tube of a second embodiment of filtration apparatus according to the present invention; FIG

Figure 11 is an explanatory view of the positional states of the ring plate from the axial direction to constitute a filter medium of the rear filtration tube of a second embodiment of filtration apparatus according to the present invention

FIG. 12 is a longitudinal sectional view taken along line AA of FIG. 11;

[Explanation of symbols]

1 Filtration Machine 6 Filter Tube 6B Rear Filter Tube 10 Input Hopper 12 Spiral Conveyor 20 (as Transfer Means) 20 Filter Media 24, 24A Ring Plate 25, 25a Mounting Hole 27 Gap Forming Member 28 Disc Spring (as Elastic Body) 29 Front Movable plate 30 Rear movable plate 32 Auxiliary reciprocating cylinder 36 Main reciprocating cylinder 37 Filter medium opening / closing means 38 Gap adjusting means E Gap between filtrate G (between ring plates) K Filtration L (between front movable plate and rear movable plate) Separation distance S Media to be filtered IS Supply side OS Discharge side

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-36098 (JP, A) JP-A-1-20008 (JP, A) JP-A 8-206416 (JP, A) (58) Investigation Field (Int.Cl. ⁷ , DB name) B01D 29/25 B01D 29/37 B01D 29/46 B01D 29/62 B30B 9/14 C02F 11/12

Claims (1)

(57) [Claims] 1. A filter medium comprising a plurality of annular ring plates, which are alternately shifted in the circumferential direction and laminated.
Mixing of liquid and solid supplied to the inside with a gap forming member disposed between two adjacent ring plates which are located at the same position in the direction and formed as a whole as a whole. A filter tube for separating the filter body comprising the body into a filter cake and a filtrate; and when performing dehydration of the filter body, the filtrate between the two adjacent ring plates constituting the filter medium. When the filter medium is closed so as to form a fine gap through which the filter medium passes, and the filter medium is washed, each of two ring plates adjacent to the filter medium can be separated via a gap forming member. And a filter medium opening / closing means for moving each ring plate and the gap forming member in the axial direction of the filter cylinder so that the filter medium is opened.