KR20090010873A - Filtration apparatus - Google Patents

Abstract

A filtering apparatus is provided to have excellent maintainability and a few components and to be assembled easily because an inner filter medium and an outer side filter medium are connected and integrated each other and have a structure driven by common driving system. A filtering apparatus comprises an inner filter medium(1), an outer filter medium(2) and a partition(3). The inner filter medium and the outer side filter medium are arranged as a concentric form and have a cylinder or a conical shape. The partition is prepared in a filtering space(4) between the outer filter medium and the inner filter medium and has a helix form. One or more the inner filter medium and the outer filter medium rotates along a circumference of center. The partition of helix does not rotated. The inner filter medium and the outer side filter medium are connected each other.

Description

Filtration unit {FILTRATION APPARATUS}

The present invention relates to a filtration device.

Filter media such as screens, nets, and perforated plates made of metals are superior in terms of operability, water retention, and durability compared to those made of fabrics (fibers), and they are used to press filter devices such as screw presses and rotary press dehydrators. There is. This device has a long history and has a very simple structure. It is characterized by low power, low noise and low cost, and it is sewage because it can obtain excellent dehydration performance even when applied to a hardly dehydrated liquid mixture having a low solid content concentration. (Iii) It is often used also in the field of dehydration (for example, refer patent document 1, patent document 2).

However, in the screw press consisting of a cylindrical outer filter medium and a screw inserted therein, the liquid to be processed is transferred at a low speed from the inlet side to the outlet side, and at the same time, it is applied to the compression pressure generated by the clamping force of the screw. Although it dehydrates continuously, since a filtrate is compressed and discharged only by an outer filter medium, it is difficult to shorten the length of an outer filter medium and it was difficult to miniaturize an installation.

On the other hand, in the rotary pressurized dehydrator, in order to improve the throughput of dehydration filtration, it is necessary to increase the diameter of the disk or to arrange a plurality of dehydrators, which causes problems of enlargement of equipment and increase in cost.

Therefore, in view of such a problem, the present inventors have a cylindrical or conical inner filter material and an outer filter material arranged concentrically, and a spiral partition provided in the filtration space between these inner filter material and the outer filter material, A filter device configured to feed a processing liquid from the side to discharge the cake from the other end side in the filtration space, and discharge the filtrate passed through the inner filter medium and the outer filter medium to the outside, wherein the inner filter medium and / or the outer filter medium are concentric. A filtration device having a configuration that rotates along a circumference and does not rotate in a spiral partition has been proposed (see, for example, Patent Documents 3 and 4).

[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-212697

[Patent Document 2] Japanese Patent Application Laid-Open No. 2001-113109

[Patent Document 3] Japanese Unexamined Patent Publication No. 2006-346600

[Patent Document 4] Japanese Patent Application Laid-Open No. 2007-160246

However, in the above invention, although the apparatus itself can be miniaturized and the dewatering performance can be improved, the following problems have arisen in structure.

(1) Since the inner filter medium and the outer filter medium are separate members, the number of parts is large, assembly is cumbersome, and maintenance is also poor.

(2) Since the drive systems of the inner filter media and the outer filter media are independent, the number of parts is large, assembly is cumbersome, and maintenance is also poor.

(3) Since the inner filter medium and the outer filter medium are separate members and pivotally supported individually, it is difficult to manage the concentricity between the inner filter medium and the outer filter medium.

(4) Since the spiral partition is supported and fixed at both ends, the partition is required to have precision in particular in the axial length, and it is necessary to adjust the axial length of the partition during assembly.

Therefore, the main subject of this invention is to solve these problems.

The present invention which solved the said subject is as follows.

<Invention described in claim 1>

A cylindrical or conical inner filter material and an outer filter material arranged concentrically and centered in the vertical direction,

A spiral partition provided in a filtration space between the inner filter medium and the outer filter medium, the spiral partition extending in a direction along the center of the inner filter medium while turning around the inner filter medium;

The inner filter medium and / or the outer filter medium rotate around its center and the spiral partition is configured not to rotate,

The to-be-processed liquid is supplied from the lower end side of the said filtration space, the filtrate which passed the said inner filter medium and the inside of the said outer filter medium is discharged | emitted to the outside, the cake formed by this filtration is raised along the partition, and the A filtration device configured to discharge upwards,

And the inner filter medium and the outer filter medium are connected to each other to be integrated.

(Action effect)

In the present invention, since the inner filter medium and the outer filter medium are integrated, there are advantages such as excellent maintainability, a small number of parts, and easy assembly. In addition, in this invention, since the inner filter medium and the outer filter medium are integrated, management of the concentricity between an inner filter medium and an outer filter medium is unnecessary.

<Invention described in claim 2>

The filtering device according to claim 1, wherein the inner filter medium and the outer filter medium are configured to be integrally rotated by a common driving source.

(Action effect)

In the invention according to the present invention, since the inner filter medium and the outer filter medium are integrated and driven by a common drive system, there are advantages such as excellent maintainability, a small number of parts, and easy assembly.

<Invention described in claim 3>

The filtering device according to claim 1 or 2, wherein the inner filter medium and the outer filter medium are suspended from the upper portion of the device.

(Action effect)

As described in the present invention, when the inner filter medium and the outer filter medium are integrated and supported and fixed in a cantilever form at the top of the apparatus, the position adjustment of the inner filter medium and the outer filter medium at the time of assembly is easy.

<Invention described in claim 4>

The casing which surrounds the periphery and the lower side of the said inner filter medium and the outer filter medium with the space | interval as much as a filtrate discharge space is provided, and the said inner filter medium and the outer filter medium are not supported by the said casing, Filtration device.

(Action effect)

In the conventional apparatus, since the inner filter medium and the outer filter medium are sandwiched between the top and bottom surfaces of the casing, the load applied to the casing is large, and the specifications required for the casing are also strict. However, by adopting the structure as described in the present invention, the casing only needs to form the filtrate discharge space, so that the design becomes easy.

<Invention described in claim 5>

The inlet conduit of the liquid to be treated extends along the centers of the inner and outer filter media from the outside of the casing to the lower ends of the inner and outer filter media. And extends in the radial direction, the tip of which penetrates through the inner filter medium and is opened into the filtration space,

This inlet pipe is rotatably comprised by rotation of the said inner filter medium and an outer filter medium, maintaining the internal communication state,

Both the inner filter medium and the outer filter medium are in communication with the filtrate discharge space,

The filtration apparatus according to claim 4, wherein a filtrate discharge port is formed at the bottom of the casing.

(Action effect)

In the conventional apparatus, the inner filter medium and the outer filter medium are sandwiched between the upper and bottom surfaces of the casing, and the inner filter medium inside and the outer filter medium outside are not in communication with each other in order to ensure the tightness of the filtration space therebetween. It was necessary to recover the filtrate discharged into the filter medium and the filtrate discharged to the outside of the outer filter medium separately. On the other hand, by employing the structure as described in the present invention, each filtrate discharged into the inner filter medium and the outside of the outer filter medium can be collectively recovered through a common filtrate discharge space, thereby miniaturizing and simplifying the filtrate discharge path. Can be planned.

<Invention described in claim 6>

The said partition is the filtration apparatus of Claim 1 or 2 currently suspended from the apparatus top.

(Action effect)

As described in the present invention, if the spiral partition is supported and fixed in the form of a cantilever beam on the upper part of the device, the partition can be accurately attached simply by adjusting the vertical position of the partition at the time of assembly.

<Invention described in claim 7>

The inner filter medium and the outer filter medium are connected to the lower side than the lower end of the partition, are not connected to the upper side of the connecting position, and the upper side is annularly opened,

The filtering device according to claim 6, wherein the partition is fixedly supported by a filtration device through an annular opening above the filtration space.

(Action effect)

By adopting the structure as described in this section, the partition can be supported in a cantilever form at the top of the device while following the basic operating principle of rotating the filter medium without rotating the partition, and only by adjusting the vertical position of the partition at the time of assembly. The partition can be attached accurately.

As described above, according to the present invention, the following advantages are derived.

(1) Since the inner filter medium and the outer filter medium are integrated, the number of parts is small, the assembly is easy, and the maintainability is also excellent.

(2) Since the inner filter medium and the outer filter medium are integrated, it is unnecessary to manage the concentricity between the inner filter medium and the outer filter medium.

1 to 5 show an example of a filtration device according to the present invention, which is arranged concentrically and centered in an up-down direction, each having a cylindrical inner filter material 1 and an outer filter material 2. ) And a spiral partition 3 provided in the filtration space between these inner filter media 1 and the outer filter media 2 and extending to ascend while turning around the inner filter media 1.

As the filter medium used for the inner and outer filter media 1 and 2, a filter cloth may be used in addition to screens such as punching metal, wedge wire, and wire mesh. Moreover, the wedge wire with a high opening ratio of a filtration surface and the contact area with a cake is large in the upper part of the filtration space 4 used as a crimping | dehydration main at the lower part of the filtration space 4 used as a main liquid separation (low opening ratio). ) Punching metal may be arranged.

The partition 3 forms a spiral (helical type or ribbon screw type) extending upward while turning around the inner filter medium 1 as shown in FIGS. 1 and 5, and the inner filter medium 1 and the outer filter medium are formed. In the cylindrical filtration space 4 formed between (2), many pieces (two in the example of illustration) are provided in the circumferential direction equally. The inner circumferential edge and the outer circumferential edge of the partition 3 are in close contact with or in contact with the filtration surfaces of the inner filter material 1 and the outer filter medium 2, respectively. When a plurality of partitions 3 are provided in a spiral shape, the height of the discharge cake is suppressed, the required height of the discharge path is reduced, the overall height of the apparatus can be reduced, and the conveyability of the discharge cake by the conveyor is improved. And the like are derived. Of course, it can also be comprised by one partition like conventionally.

In more detail below, this apparatus example has the horizontal support stand 40 and the horizontal support stand 41 spaced apart from the upper support stand and supported by the support stand 40. The outer filter medium 2 is supported by this support zone 40 so as to be able to rotate freely. Specifically, the upper end of the outer filter medium 2 is provided with a cylindrical support portion 2X, and the inner circumferential edge portion of the annular rotating plate 20 concentric with the outer filter medium 2 is connected to the upper surface of the support portion 2X. The first annular pinion gear 21 is concentrically connected with the outer filter medium 2 to the lower surface of the annular rotating plate 20 in the radially outer side, and this first annular pinion gear 21 is known. It is supported by the outer filter medium 2 provided on the zone 40 and the concentric annular rail 22. The teeth of the outer circumferential surface of the first annular pinion gear 21 are meshed with the pinion gear G1 of the drive shaft of the first motor M1 mounted on the support zone 40.

The lower end portion of the inner filter medium 1 is lower than the lower end of the partition 3 so that the outer filter medium 2 is closed through the annular plate 6 which closes the lower opening between the inner and outer filter mediums 1 and 2 (filtration space). It is connected to the lower end and integrated. Therefore, by driving the first motor M1, not only the outer filter medium 2 but also the inner filter medium 1 connected thereto are driven to rotate integrally. In addition, above both lower connection positions (annular plate 6) of inner and outer filter media 1 and 2, both filter media 1 and 2 are not connected, and between both filter media 1 and 2 [filtration space (4)] is open in an annular shape, and the partition 3 protrudes upward from the upper end of the outer filter medium 2 through the annular opening. The upper end of the partition 3 is provided with an annular support portion 3X, and the upper end of the support portion 3X is suspended and supported on the upper part of the apparatus by being fixed to the sub support 41, and the lower end of the partition 3 Is located near the bottom of the filtration space 4. The inner filter medium 1 also protrudes upward from the upper end of the outer filter medium 2, and the upper end thereof is pivotally supported by the supporter 41 so as to be rotatable. Thus, by integrating the structure, supporting the cantilever, and driving in common, the maintenance is excellent, the number of parts is small, and assembly is easy.

The lower casing 42 is suspended and supported on the lower side of the support zone 40 so as to surround the periphery and the lower side of the outer filter medium 1, 2 with a gap as much as the filtrate discharge space 16. The lower casing 42 only forms the filtrate discharge space 16, and no large load is applied thereto.

A filtrate outlet 13 is formed at the bottom of the lower casing 42. In addition, the supply pipe 10 of the liquid to be treated passes through the bottom of the lower casing 42 from the outside of the lower casing 42 to the lower ends of the inner and outer filter media 1, 2, and the inner and outer filter media 1. After extending along the center of (2), it extends in the radial direction, and its tip penetrates through the inner filter medium (1) and is opened into the filtration space (4) above the annular plate (6). The feed pipe 10 is interposed with a swivel joint 45 outside the lower casing 42, and is rotatable in accordance with the rotation of the inner and outer filter media 1, 2 while maintaining the communication state inside the pipe. It is. The liquid to be processed is pressurized and supplied by a pump (not shown) through the delivery pipe line 10. In addition, although the inlet conduit 10 passes through the inner filter medium 1, but is opened downward, the inner filter medium 1 and the outer filter medium 2 outside are provided to the common filtrate discharge space 16. It is structure to communicate. Therefore, the filtrate discharge path is compact and simple.

On the upper side of the filtration space 4 (same as the upper side of the outer filter medium 2), a cylindrical discharge space 4X is formed in which the filtration space 4 is extended upward as it is and continuously formed. The upper part of the discharge space 4X is surrounded by the bottom surface of the support part 3X of the partition 3, and the inner circumference is surrounded by the outer peripheral surface of the inner filter medium 1. Each partition 3 extends to the upper end of the discharge space 4X, respectively, and the vertical wall 3E is erected on the upper surface of the lower end of the sections from the lower end to the upper end of each extension part. The outer circumferential surface to the upper end is covered by the circumferential wall 3R covering the same height range as the vertical wall 3E, respectively, and the opening portions between the circumferential walls 3R are the outer circumferential surface (side surface) of the discharge space 4X. As the discharge port 24 opened by the opening, the number of partitions 3 is formed. The end wall 3E has a function of taking out the cake rising along the partition 3 and extruding it to the discharge port 24.

The outer circumference of the discharge space 4X is concentrically surrounded by the cylindrical opening regulator 26. An opening 26X is formed in the opening regulator 26 at a position overlapping with the discharge port 24, and an annular top plate 26P extends so as to cover the upper portion of the annular rotating plate 20. The opening regulator 26 is rotatable in the circumferential direction of the discharge space 4X, and the second annular pinion gear 27 is concentrically connected to the upper end surface thereof, and the second annular pinion gear 27 is provided. The teeth on the outer circumferential surface thereof are engaged with the pinion gear G2 of the drive shaft of the second motor M2 mounted on the sub support 41. By moving the opening regulator 26 by the drive control of the second motor, the area of the non-opening portion other than the opening 26X and the portion overlapping the discharge port 24 is changed, and the opening area of the discharge port 24 is changed. [Part overlapping with opening 26X] is adjusted.

In order to detect the position of the opening regulator 26, the non-contact sensor 30, such as a proximity switch, is provided in multiple numbers at intervals in the moving direction of the opening regulator 26. As shown in FIG. In the figure, the one or more detection part (detection plate) 31 is provided in position in the upper side of the annular top plate 26P of the opening control body 26 so that position adjustment is possible, The non-contact sensor 30 is provided on the movement trace of the detection part 31 according to the movement, and is based on the correspondence between the position which the detection part 31 detected by the non-contact sensor 30, and the position of the opening adjuster 26. The position of the opening regulator 26, that is, the opening area of the discharge port 24 can be detected. By performing drive control of the second motor M2 based on this detection result, it is possible to control the back pressure based on the opening area of the discharge port 24.

The above-mentioned annular rotating plate 20 is provided so that an upper surface is located between the lower end of the discharge port 24 and the upper end of the outer filter medium 2, and surrounds the discharge space 4X in plan view. On the upper side of the annular rotating plate 20, a discharge guide plate 25 is provided so as to cross from the inner peripheral edge to the outer peripheral edge of the annular rotating plate 20. The lower end of the discharge guide plate 25 is slightly spaced apart from the upper surface of the annular rotating plate 20. The inner end of the discharge guide plate 25 (the end located on the inner circumferential side of the annular rotating plate 20) is in contact with the side edge of the outer side of the end wall 3E in any one discharge port 24. One end protrudes outward from the outer circumferential edge of the annular rotating plate 20 and is connected to the support base 40. The discharge guide plate 25 crosses the annular rotating plate 20 obliquely with respect to the radial direction thereof so as to be located at the rear side in the rotational direction of the annular rotating plate 20 as it faces the outer end.

In addition, in the position located between the discharge port 24 in the rotation direction on the upper side of the annular rotating plate 20, an intermediate position between the inner peripheral edge and the outer peripheral edge (for example, the center) from the inner peripheral edge of the annular rotating plate 20. The guide plate 29 which is biased outward so as to traverse to ()) is erected and installed. The lower end of the guide plate 29 biased outward is slightly spaced apart from the upper surface of the annular rotating plate 20, and the inner end (the end located on the inner circumferential side of the annular rotating plate 20) is connected to the outer peripheral surface of the opening regulator 26. have. In addition, the guide plate 29 which is biased outwardly crosses the annular rotating plate 20 obliquely with respect to the radial direction so as to be located at the rear side in the rotational direction of the annular rotating plate 20 as it faces the outer end.

The outer circumference of the annular rotating plate 20 and the annular top plate 26P is surrounded by a cylindrical upper casing 43. In the upper casing 43, a range from the circumferential position corresponding to the inner end of the discharge guide body 25 to the circumferential position corresponding to the outer end is opened as the discharge chute 44. In addition, in the figure form, the upper end of the upper casing 43 is connected to the support base 41, the lower end is connected to the support base 40, and the support base 41 is connected to the support through the upper casing 43 ( The structure is supported by 41).

On the other hand, in the figure, the inner side washing tube 8 and the outer side washing tube 9 are provided in order to wash | clean the inner side and outer side filter media 1, 2, respectively. 1 and 2, the inner cleaning tube 8 is provided along the inner circumferential surface of the inner filter medium 1, and the plurality of cleaning nozzles 8A, 8A,... Is attached to the inner cleaning tube 8 so as to face the inner circumferential surface of the &quot; Similarly, the outer side cleaning tube 9 is provided along the outer peripheral surface of the outer side filter medium 2, and the outer side washing tube 9A, 9A, ... is made so that the outer side surface may face the inner peripheral surface of the outer side filter medium 2. It is attached to (9). As the cleaning liquid, water or alkaline chemicals can be used.

In the filtration apparatus comprised in this way, a filtration operation can be performed as follows. That is, by operating the first motor M1, the inner filter medium 1, the outer filter medium 2, and the annular rotating plate 20 are integrally rotated in the same direction as the direction of the upward turning of the partition 3, and the liquid to be treated. The liquid to be processed is pumped into the filtration space 4 through the delivery pipe 10.

The to-be-processed liquid fed into the filtration space 4 is subjected to two-side filtration by the inner filter medium 1 and the outer filter medium 2. In more detail, the to-be-processed liquid fed from the to-be-processed liquid supply line 10 has a low solid content concentration, and has fluidity, and in the lower part of the filtration space 4, the inner filter medium 1 and the outer filter medium 2 are carried out. Filtration concentration occurs through the pores in. As the concentration proceeds, the fluidity is lost and a cake is formed. The cake moves in the circumferential direction of the filtration space 4 by friction with the rotating inner and outer filter media 1, 2. At this time, since the spiral partition 3 is arranged in the filtration space 4, the cake rotating along the inner and outer filter media 1, 2 interferes with the partition 3, and furthermore, the treatment target As the delivery pressure of the liquid is applied from the lower side, the liquid rises about the axis. By this motion, solid-liquid separation is performed at the lower part of the filtration space 4, and a cake is formed, and the cake is crimped and dewatered at the upper part of the filtration space 4, and then from the upper part of the filtration space 4 to the discharge space 4X. Pushed up.

On the other hand, the filtrate discharged inside the inner filter medium 1 and outside the outer filter medium 2 by filtration is collected at the bottom of the lower casing 42 and discharged from the filtrate discharge port 13.

The cake pushed up to the discharge space 4X along each partition 3 is discharged onto the annular rotating plate 20 through each discharge port 24, respectively. At this time, in the rotational direction rear side of each discharge port 24, the cake located from the inner peripheral edge to the intermediate position on the annular rotating plate 20 is previously extruded to the outer peripheral edge side by the guide plate 29 biased outward, The cake discharge space is secured at the discharge position of the outlet 24. The cake placed on the annular rotating plate 20 is extruded from above the annular rotating plate 20 to the discharge chute 44 on the outside by the common discharge guide 25 in the process of being rotated and conveyed in accordance with the rotation of the annular rotating plate 20. It is discharged out of the machine and sent to the next processing process through the conveyor.

On the other hand, at the time of washing | cleaning, washing | cleaning water is pressurized from several washing nozzles 8A, 8A, 9A, 9A, ..., while rotating the inner filter medium 1 and the outer filter medium 2 along an axial circumference. By spraying, the filtration surfaces of the clogged inner filter medium 1 and outer filter medium 2 are washed. The washing water sprayed at the time of washing | cleaning is gathered in the lower part of the lower casing 42 with a filtrate as washing | cleaning drainage, and is discharged | emitted from the filtrate discharge port 13.

<Others>

(a) In the above example, the inner circumferential edge and the outer circumferential edge of the partition 3 are in close proximity or contact with the filtration surfaces of the inner filter medium 1 and the outer filter medium 2, respectively, but the solid-liquid separation action is mainly performed in the filtration space ( Since the lower portion of 4), i.e., is exhibited strongly near the inlet 10, 11 side of the processing liquid, the inner and outer edges of the partition 3 should be at least near the inlet 10, 11 side of the processing liquid. What is necessary is just a structure which adjoins or contacts each of the inner side and outer side filter media 1 and 2, respectively.

(b) The partition 3 may make the spiral pitch uniform throughout the inside of the filtration space 4, but may be configured to narrow as it goes upward, as shown in FIG. In addition, you may comprise so that a pitch space | interval may become long as a spiral partition 3 moves from the bottom board 7B side of the casing 7 to the top board 7A side.

(c) Although the filtration space 4 according to the embodiment shows an annular shape having the same cross-sectional area from the top to the bottom, the lower part of the filtration space 4 has a large capacity of the filtration chamber to secure a throughput, while In the upper part of the filtration space 4, in order to improve the dehydration efficiency, it is also preferable to narrow the radius difference of the inner and outer filter media 1, 2.

Specifically, as shown in FIG. 6, the shape of the outer filter medium 2 continuously expands the radial direction of the inner filter medium 1 from the liquid-feeding side to the cake discharge side while maintaining the same shape (approximately). Conical shape) or a step (multistage cylindrical shape) extending in a step shape as shown in FIG. 7 can be proposed. In addition, as shown in FIG. 8, the shape of the inner filter material 1 is continuously reduced in the radial direction of the outer filter material 2 from the liquid-feeding side to the cake discharge side while maintaining the same shape, or FIG. 9. As shown in FIG. 2, a shape that is reduced to a stepped shape may be proposed.

(d) Even when the inner filter medium 1 and the outer filter medium 2 are rotated at the same angular velocity (° / sec), a circumferential speed (mm / sec) corresponding to each radial difference is generated, so that the shear force is applied to the cake. This occurs and the dewatering efficiency is improved. For example, this shearing force is more effective with respect to the to-be-processed liquid containing the raw sludge or mixed raw sludge which has many fiber powder. Depending on the shape of the cake, when a shearing force is applied, the cake may be fluidized, and conversely, dehydration may be impaired. Therefore, in this case, it is preferable to make the circumferential speed difference constant and rotate. In addition, the cake can be rotated with a constant circumferential speed difference even for a cake which has a dehydration effect due to shearing force and cake molding hardly changes over a year.

(e) In addition to connecting the inner filter medium 1 and the outer filter medium 2 so as not to rotate with each other, they may be rotatably connected to one another along a center circumference. In that case, only either one of the inner side filter medium 1 and the outer side filter medium 2 can be rotated. In addition, when rotating both the inner side filter medium 1 and the outer side filter medium 2, the drive system can be provided independently.

(f) The inner filter media 1 and the outer filter media 2 can be supported in the form of cantilever beams with respect to the lower part of the filtration device, or in the form of support beams with respect to the upper and lower parts of the device.

(g) The partition 3 of the above example is fixedly supported in the form of a cantilever at the top of the filtration apparatus through an annular opening above the filtration space 4, but the support form of the inner filter media 1 and the outer filter media 2 is It can decide suitably according to a connection site. For example, the inner filter medium 1 and the outer filter medium 2 may be connected and integrated only at an upper side than the upper end of the partition 3, and in this case, cantilever the lower part of the filtration device through an annular opening below the filtration space 4. Can be supported in the form.

1 is a longitudinal sectional view of a filtration device;

2 is an enlarged view of a portion A of FIG. 1;

3 is a cross-sectional view taken along the line B-B in FIG.

4 is a cross-sectional view taken along the line C-C in FIG.

5 is a perspective view of a partition;

6 is a longitudinal sectional view schematically showing another filtration device;

7 is a longitudinal sectional view schematically showing another filtration device;

8 is a longitudinal sectional view schematically showing another filtration device;

9 is a longitudinal sectional view schematically showing another filtration device;

<Explanation of sign>

1: inner filter medium

1A: Top plate

2: outer filter medium

3: dividers

4: filtration space

5: inner cylinder rotation shaft

7: casing

7A: Tops

7B: Bottom Plate

7C: slope

8: inner cleaning pipe

9: outside cleaning pipe

10: processing liquid input pipe

13: filtrate outlet

14: filtration space outlet

16: filtrate discharge space

20: annular rotating plate

24: discharge port

25: discharge guide

26: opening regulator

29: Outwardly Guided

40: Governor Zone

41: supporters

42: lower casing

43: upper casing

44: discharge chute

45: swivel joint

Claims (7)

A cylindrical or conical inner filter material and an outer filter material arranged concentrically and centered in the vertical direction, A spiral partition provided in a filtration space between the inner filter medium and the outer filter medium, the spiral partition extending in a direction along the center of the inner filter medium while turning around the inner filter medium; At least one of the inner filter media and the outer filter media rotates around its center and the spiral partition is configured to not rotate, The to-be-processed liquid is supplied from the lower end side of the said filtration space, the filtrate which passed the said inner filter medium and the inside of the said outer filter medium is discharged | emitted to the outside, the cake formed by this filtration is raised along the partition, and the A filtration device configured to discharge upwards, And the inner filter medium and the outer filter medium are connected to each other to be integrated. The filtering device according to claim 1, wherein the inner filter medium and the outer filter medium are configured to be integrally rotated by a common driving source. The filtration apparatus according to claim 1 or 2, wherein the inner filter media and the outer filter media are suspended from the top of the apparatus. The casing according to claim 3, wherein a casing is provided which surrounds the periphery and the lower side of the inner filter medium and the outer filter medium with a gap as much as the filtrate discharge space, and the inner filter medium and the outer filter medium are not supported by the casing. Filtration device. The inlet conduit of the liquid to be treated extends along the centers of the inner and outer filter media from the outside of the casing to the lower ends of the inner and outer filter media. And extends in the radial direction, the tip of which penetrates through the inner filter medium and is opened into the filtration space, This inlet pipe is rotatably comprised by rotation of the said inner filter medium and an outer filter medium, maintaining the internal communication state, Both the inner filter medium and the outer filter medium are in communication with the filtrate discharge space, Filtrate outlet is formed in the bottom of the casing. The filtering device according to claim 1 or 2, wherein the partition is suspended from the top of the device. The said inner filter medium and said outer filter medium are connected below the lower end of the said partition, are not connected from the upper side rather than this connection position, and open upper side annularly, And the partition is fixedly supported by the filtering device through the annular opening above the filtering space.

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