WO2011158648A1

WO2011158648A1 - Device for expanding filter cloths in a filter press and filter press

Info

Publication number: WO2011158648A1
Application number: PCT/JP2011/062571
Authority: WO
Inventors: 伸夫本田; 康二原; 和久大谷; 正二元家
Original assignee: 株式会社石垣
Priority date: 2010-06-16
Filing date: 2011-06-01
Publication date: 2011-12-22
Also published as: KR20130020797A; CN102946965A; TWI498145B; JP5382459B2; JP2012000565A; KR101449568B1; CN102946965B; TW201219099A

Abstract

The filter cloth-expanding devices (100, 100A) in a filter press (200) wherein pairs of filter cloths (11, 11), the upper edges of which are joined, are expanded between filter plates (2, 2) that are open- and closeably disposed to face each other are provided with hollow rotating rolls (24) that are provided below the filter plate (2) and around which the lower ends of the filter cloths (11) are wound, floating rolls (23) that are rotatably disposed in the hollow interiors of the rotating rolls (24), and a pair of lower brackets (6, 6) that extend down from the lower parts of both edges of the filter plates (2). The paired lower brackets (6, 6) have elongated holes (22, 22) that are formed in the vertical direction and hold both ends of the floating rolls (23) therein.

Description

Filter cloth suspending device and filter press in filter press

The present invention relates to a filter cloth suspending device for a filter press that treats water sludge, sewage sludge, industrial wastewater sludge, and the like, and a filter press provided with the filter cloth suspending device.

In the past, filter presses for treating large volumes of sludge have been shortening the cake discharge time by running a filter cloth suspended between filter plates in order to shorten the filtration cycle time. The new filter cloth gradually shrinks when immersed in the stock solution.

As a lifting device that can freely lift and lower the filter cloth to adjust the expansion and contraction of the filter cloth, for example, a clamp provided with a screw rod is connected to the drive band that fastens the upper edge of the filter cloth, and the lower end of the filter cloth is clamped Patent Document 1 proposes a filter cloth suspension device that adjusts expansion and contraction of a filter cloth with a nut that is engaged with the holding portion and screwed into a screw rod.

As a filter tension adjustment device for filter cloth contraction, for example, a guide roll with a lower end portion of the filter cloth hung through a long hole of a bracket hanging below the filter plate is inserted and supported, and the guide roll is spring-loaded. Patent Document 2 proposes a filter cloth suspending device that is pressed by the above method.

A female thread is provided at the end of the guide roll of the filter cloth that is inserted into and supported by the long hole of the bracket that hangs down the lower part of the filter plate, and the tension of the filter cloth that is shrunk by the feed screw that is screwed into the female thread is relieved. A cloth suspension device is proposed in Patent Document 3.

Japanese Utility Model Publication No. 8-963 (paragraph number 0011, FIG. 4) Japanese Utility Model Publication No. 62-36489 (Claim 1, FIG. 1 and FIG. 2) Japanese Utility Model Publication No. 1-331289 (

Claims

1, 2 and 3)

In the related filter cloth suspension device, a traveling band such as a drive chain is connected to the filter cloth in an endless manner, and the filter cloth is suspended between the upper sprocket and the lower return roll so as to be movable up and down. The filter cloth suspension device of Patent Document 1 can be easily attached and removed in a short time, which is a consumable that needs to be replaced periodically, but the lower return roll is fixed, Since the filter cloth tension adjustment is performed with screw rods connected to the chain between the filter plates, each adjustment is necessary for the contraction of the filter cloth, which takes time and effort.

The filter cloth suspension device of Patent Document 2 can automatically adjust the running load against the shrinkage of the filter cloth by pressing a guide roll wound around the filter cloth with a spring. As this increases, the amount of compression of the spring increases and the tension of the filter cloth increases. For this reason, the traveling load becomes high, and it is necessary to adjust the filter cloth tension.

The filter cloth suspension device of Patent Document 3 adjusts the left and right heights of the guide roll around which the lower end of the filter cloth is wound by operating a feed screw screwed into the female screw at the end of the guide roll. The tension can be relieved against the shrinkage of the filter cloth, but the adjustment is performed by operating the feed screw that is screwed into the female screw at the end of the guide roll. , Work takes time.

The present invention is capable of automatically adjusting the vertical movement of the return roll that hangs around the lower end of the filter cloth, and relieves the tension according to the shrinkage of the filter cloth, thereby equalizing the right and left tension of the filter cloth. And a filter press provided with the filter cloth suspension device.

A first aspect of the present invention is a pair of filter cloths including a filter plate disposed so as to be openable and closable and two filter cloths each having an upper edge connected thereto, and an upper portion of the filter plate A filter cloth suspension device in a filter press including a pair of filter cloths having an upper end connected to a lifting means provided on the filter plate and suspended in the vertical direction between the filter plates, and provided below the filter plate. A hollow rotating roll that hangs around the lower end of the filter cloth, an idle roll that is rotatably arranged inside the hollow of the rotating roll, and a pair of lower brackets that hang down from both lower ends of the filter plate, And a pair of lower brackets formed in the vertical direction and having elongated holes for supporting both end portions of the floating rolls inside, the filter cloth suspending device in the filter press.

According to a second aspect of the present invention, there is provided a filter plate disposed so as to be openable and closable, a pulling means provided at an upper portion of the filter plate, and two filter cloths each having an upper edge connected thereto. Including a pair of filter cloths whose upper ends are connected to the pull-up means and are suspended in the vertical direction between the filter plates, and hollows provided below the filter plates and wound around the lower end portions of the filter cloths A rotary roll, an idle roll disposed rotatably inside the rotary roll, and a pair of lower brackets suspended from the lower ends of both ends of the filter plate, wherein the idle roll is formed in the vertical direction inside The gist of the present invention is that the filter press includes a pair of lower brackets each having a long hole that supports both end portions.

According to the first and second aspects, since the rotating roll extrapolated to the idle roll is caused to rotate along with the filter cloth, the sliding contact resistance can be reduced. Since the return roll is inserted and supported in the slot of the lower bracket without being fixed, the return roll becomes a floating type, the return roll is automatically moved up and down, and the tension of the filter cloth accompanying the shrinkage of the filter cloth is relieved. Therefore, it is not necessary to adjust the filter cloth according to the shrinkage of the filter cloth. Since the tension of the filter cloth can be kept constant with the weight of the return roll, the running load is stabilized.

The filter cloth suspending device and the filter press in the filter press are provided along the elongated holes in pinion gears attached to both ends of the idle roll and the pair of lower brackets, respectively, and mesh with the pinion gears. And a rack gear.

According to the above configuration, even when the filter cloth wound around the rotating roll contracts irregularly, the idle roll rotates by meshing the pinion gear and the rack gear, and the pinion gear meshed with the rack gear at the other end also rotates in synchronization. It is possible to synchronize the left and right movement positions of the return roll. Therefore, even if the filter cloth shrinks, the left and right heights of the idle roll, that is, the left and right height positions of the return roll are equalized, the tension of the filter cloth is relaxed, and the adjustment of the filter cloth tension becomes unnecessary. Further, wrinkling and breakage of the filter cloth and pinching of the drive chain due to correction of the meandering of the filter cloth can be prevented.

In addition, the filter cloth suspending device and the filter press in the filter press are attached to the pair of lower brackets so as to cover both ends of the idle roll, and prevent the idle roll from coming out of the long hole. You may further provide a pair of omission prevention plates.

According to the above configuration, the left and right sliding of the idle roll can be regulated to prevent meandering during traveling of the filter cloth. Even if one end of the idle roll rises irregularly due to the offset shrinkage of the filter cloth, it is possible to prevent the idle roll from coming out of the long hole of the lower bracket. That is, means for preventing meandering left and right due to the shrinkage of the filter cloth of the return roll which can be freely raised and coming out from the elongated hole of the lower bracket is provided.

FIG. 1 is a front view of a filter press and a filter cloth suspending device in the filter press according to an embodiment of the present invention. FIG. 2 is a perspective view of a pair of filter cloths suspended between the filter plates. FIG. 3 is a side view of an essential part of a filter press in which a pair of filter cloths are suspended between filter plates. FIG. 4 is a front view of an essential part of the filter cloth suspension apparatus according to the first embodiment of the present invention. FIG. 5 is a side view of the filter cloth suspension device of FIG. 4. FIG. 6 is a side view of a filter cloth suspending device according to a second embodiment of the present invention. FIG. 7 is a partially longitudinal front view of the filter cloth suspension device of FIG. 6.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a filter press 200 according to an embodiment of the present invention and a

suspension device

100, 100A for a filter cloth 11 in the filter press 200. FIG. A large number of filter plates 2 are slidably bridged between a pair of

guide rails

1, 1 spanned around frames (not shown) before and after the filter press 200. A filter cloth drive shaft 4 is supported on upper brackets 3 and 3 (lifting means) erected on the upper part of the filter plate 2 and connected to a slide shaft 5 that transmits a drive force to the filter cloth drive shaft 4. It is. A pair of

return rolls

7, 7 are supported on

lower brackets

6, 6 suspended from the lower ends of both ends of the filter plate 2, and a washing water pipe 8 is disposed near the lower portion of the return roll 7. A filter bed 2a is formed at the center of the filter plate 2, and a stock solution supply port 9 is opened at the upper center and a filtrate discharge port 10 is opened at both lower ends.

FIG. 2 is a perspective view of a pair of

filter cloths

11, 11 suspended between the filter plates 2. The filter cloth 11 hung on the filter plate 2 forms a bag part 12 by joining the upper edges of the pair of

filter cloths

11, 11, and forms the

bag parts

13, 13 also at the lower edge of the

filter cloths

11, 11, respectively. is doing. An upper filter cloth core 14 and lower

filter cloth cores

15 and 15 are inserted into the bag portion 12 at the upper edge and the

bag portions

13 and 13 at the lower edge, respectively. The stock solution supply plate 16 is sandwiched between the pair of

filter cloths

11, 11, and the stock solution passage 18 of the stock solution supply plate 16 is fitted into the through hole 17 opened in the upper central portion of the filter fabric 11. A liquid supply path 19 is provided which branches from the raw liquid passage 18 and supplies the raw liquid to the filtration surface of the filter cloth 11.

FIG. 3 is a side view of a main part of a filter press 200 in which a pair of

filter cloths

11, 11 are suspended between the filter plates 2, and the filter cloth 11 shown in FIG. 2 is suspended from the filter plate 2 shown in FIG. 1. . A pair of

filter cloths

11, 11 are disposed between the filter plates 2 arranged in parallel so as to be openable and closable, and

drive chains

20, 20 connected to both ends of the upper filter cloth core 14 of the filter cloth 11 are connected to the upper filter plate 2. It is hung around

sprockets

21 and 21 fitted to the cloth drive shaft 4. The lower filter cloth core 15 is inserted into the lower end of the filter cloth 11 by hanging the lower ends of the

filter cloths

11, 11 suspended before and after the filter board 2 around the

return rolls

7, 7 arranged below the filter board 2. , 15 are connected to the other ends of the

drive chains

20, 20, and the filter cloth 11 is suspended up and down. When the parallel filter plates 2 are closed, the undiluted solution supply plate 16 suspended on the filter cloth 11 is sandwiched between the front and

rear filter plates

2, 2, and a pair of

filter cloths

11, 11 suspended on the filter bed 2 a of the filter plate 2. A filtration chamber 30 is formed between them. The stock solution passage 18 of the stock solution supply plate 16 is communicated with the stock solution supply port 9 formed in the

filter plates

2 and 2, and the stock solution is press-fitted into the filtration chamber 30 from the feed channel 19 of the stock solution supply plate 16, and the filter cloth 11 is filtered. Solid-liquid separation is performed on the surface.

[First embodiment]
FIG.4 and FIG.5 is the principal part front view and side view of the filter cloth suspension apparatus 100 which concern on 1st Embodiment of this invention. Long holes 22 and 22 are opened in the vertical direction by shifting the positions of the

lower brackets

6 and 6 suspended from the lower ends of both ends of the filter plate 2, and a pair of returns is provided in the

long holes

22 and 22 of the left and right

lower brackets

6 and 6

Rolls

7 and 7 are slidably supported. The return roll 7 includes an idle roll 23 that is supported in the elongated hole 22 of the lower bracket 6, and a rotary roll 24 that is extrapolated to the idle roll 23 and hangs around the filter cloth 11. In the return roll 7, both ends of the idle roll 23 protrude from the end of the rotary roll 24, and a sliding sleeve 25 is fitted on the return roll 7 so as to be inserted and supported in the elongated hole 22 of the lower bracket 6. When raising or lowering the filter cloth 11 whose lower end is wound around the rotary roll 24, the rotary roll 24 extrapolated to the idle roll 23 is rotated along with the filter cloth 11 to reduce sliding resistance.

The return roll 7 can be raised by a predetermined moving height h. That is, when the filter cloth 11 is immersed in the stock solution and contracts, the rotary roll 24 around which the contraction filter cloth is wound is pulled, and the idle roll 23 can slide up along the long hole 22 of the lower bracket 6. . Since the return roll 7 is inserted and supported in the elongated hole 22 of the lower bracket 6 without being fixed, the return roll 7 can be moved up and down, and the filter cloth tension adjustment is automatically performed according to the shrinkage of the filter cloth 11. . Since the tension of the filter cloth 11 can maintain a constant tension by the weight of the return roll 7, the traveling load is stabilized. A slip prevention plate 26 is fixed to the outside of the long hole 22 of the lower bracket 6 through which the idle roll 23 constituting the return roll 7 is inserted and supported, and the sliding of the idle roll 23 on the right and left is restricted. The meandering of the cloth 11 is prevented. Even if one end of the idle roll 23 rises irregularly due to the offset shrinkage of the filter cloth 11, the idle roll 23 does not come out of the long hole 22 of the lower bracket 6.

[Second Embodiment]
6 and 7 are a side view and a partially longitudinal front view of a filter cloth hanger 100A according to a second embodiment of the present invention. The idler roll 23 with the rotary roll 24 constituting the return roll 7 extrapolated is fitted with pinion gears 28 and 28 with both ends of the idler roll 23 projecting from the long holes 22 of the lower bracket 6. Rack gears 29 and 29 are disposed along the long holes 22 of the lower bracket 6, and the pinion gears 28 at both ends of the idle roll 23 are meshed with the rack gear 29.

When the filter cloth 11 is immersed in the stock solution and contracts, the filter cloth 11 wound around the rotary roll 24 contracts irregularly, and when one end of the idle roll 23 is going to rise, the pinion gear 28 fitted to the idle roll 23 is used. And the rack gear 29 mesh with each other, the idle roll 23 rotates, and the pinion gear 28 meshed with the rack gear at the other end also rotates in synchronization. Even if the filter cloth 11 shrinks, both ends of the return roll 7 move up and down in synchronism, thereby applying a uniform tension to the filter cloth 11 and preventing the filter cloth 11 from wrinkling and breaking.

The

suspension device

100, 100A for the filter cloth 11 in the filter press 200 according to the embodiment of the present invention described above is a rotation obtained by extrapolating the return roll 7 around the lower end of the filter cloth 11 to the idle roll 23 and the idle roll. Since both ends of the idle roll 23 are inserted into and supported by a long hole 22 formed in the vertical direction in the lower bracket 6 of the filter plate 2 and the filter cloth 11 is hung around the rotary roll 24 The roll 7 is automatically moved up and down, and adjustment of the filter cloth tension according to the shrinkage of the filter cloth 11 becomes unnecessary. Further, if the pinion gear 28 is fitted to both ends of the idle roll 23 with the rotating roll 24 inserted and the rack gear 29 is disposed along the long hole 22 of the lower bracket 6, the left and right movement positions of the return roll 7 are synchronized. It is possible to prevent wrinkling and breakage of the filter cloth 11 due to meandering correction of the filter cloth 11, and to prevent the drive chain from being caught.

The embodiment of the present invention can be applied to a filter cloth suspending device that can run freely, such as a filter press for treating large-capacity sludge such as water sewage sludge, sewage sludge, and industrial wastewater sludge.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible.

Claims

A pair of filter cloths including a filter plate disposed so as to be openable and closable and two filter cloths each having an upper edge connected to each other, the upper end of the pulling means provided on the upper part of the filter plate In a filter cloth hanging device in a filter press, including a pair of filter cloths that are connected to each other and suspended in the vertical direction between the filter plates,
A hollow rotating roll provided below the filter plate and wound around the lower end of the filter cloth,
An idle roll disposed rotatably inside the hollow of the rotary roll;
A filter press comprising a pair of lower brackets suspended from the lower ends of both ends of the filter plate, and a pair of lower brackets formed in the vertical direction and having elongated holes for supporting both ends of the floating roll inside. Filter cloth hanging device.
Pinion gears attached to both ends of the idle roll;
The filter cloth suspension device for a filter press according to claim 1, further comprising: a rack gear provided along each of the pair of lower brackets along the elongated hole and meshing with the pinion gear.
2. The filter according to claim 1, further comprising a pair of slip prevention plates attached to each of the pair of lower brackets so as to cover both ends of the idle roll and preventing the idle roll from coming out of the elongated hole. A filter cloth hanging device in a press.
A filter plate arranged so as to be freely opened and closed;
Pulling means provided at the top of the filter plate;
A pair of filter cloths, each of which includes two filter cloths connected to each upper edge part, the upper end part of which is connected to the lifting means, and is suspended in the vertical direction between the filter plates;
A hollow rotating roll provided below the filter plate and wound around the lower end of the filter cloth,
An idle roll disposed rotatably inside the hollow of the rotary roll;
A filter press comprising a pair of lower brackets suspended from the lower ends of both ends of the filter plate, and a pair of lower brackets formed in the vertical direction and having elongated holes for supporting both ends of the floating roll inside. .