JP5796821B2 - Filter cloth for filter press - Google Patents

Description

  The present invention relates to a filter press that peels off a cake adhered by vibrating a filter cloth, and an elastic member is disposed on a non-filtering surface of the filter cloth, and bending due to vibration is suppressed in a portion where the elastic member is disposed. It relates to the filter cloth.

In the conventional filter press, the stock solution is injected into the filtration chamber between the filter plates and solid-liquid separation is performed with the filter cloth.After the solid-liquid separation is completed, as a technique for peeling the cake attached to the filter cloth, There is a technology to vibrate filter cloth.
As an apparatus that vibrates the filter cloth and peels the cake between the filter cloths, for example, a filter cloth is provided so as to cover the filter bed on the front and back of the filter plate, and is added to a support member that supports the upper part of the filter cloth above the filter plate. Patent Document 1 discloses a filter press in which a vibrating device is installed and the filter cloth between the opened filter plates is vibrated all at once to peel the cake.

In addition, in order to transmit the vibration of the filter cloth to the filtration surface, an elastic member is provided on both the left and right sides of the filter cloth, and when the upper part of the filter cloth is vibrated, the filter press is curved so that the entire filter cloth is warped. Is described in Patent Document 2. The entire filter cloth repeats a reciprocating motion of bending and stretching, whereby vibrations are effectively transmitted to the left and right side edges of the filter cloth and the entire vicinity thereof, and the cake can be peeled off quickly.

Japanese Utility Model Publication No. 06-41806 JP-A-62-11513

However, in the said patent document 1, the cake adheres on the filtration surface of the filter cloth, and the filter cloth is difficult to wave. Therefore, even if the upper part of the filter cloth is vibrated with the cake attached, only the deflection occurs on the non-filtering surface of the upper part of the filter cloth, and the vibration is not transmitted well to the cake attached part.

  In order to solve the above problem, in Patent Document 2, elastic members having a length from the upper end to the lower end of the filter cloth are disposed at the left and right ends of the filter cloth. When this filter cloth is vibrated when the cake is peeled off, the entire filter cloth is curved, but the cake is difficult to peel off because the curvature is small, and vibration with a large amplitude must be applied to increase the curvature. Since the peeling of the filter cloth is urged by the movement of the filter cloth, the cake that has failed to peel once does not peel off unless it is repeatedly vibrated. In addition, since it is necessary to provide long elastic members on the left and right ends of the filter cloth, it takes time and labor to assemble and disassemble.

In the filter cloth for filter press suspended between the filter plates of the filter press, which is configured by opening and closing a large number of filter plates in parallel on a pair of guide rails supported on the front frame and rear frame, the filter bed of the filter plate 7 is provided with a filtration surface for solid-liquid separation in contact with 7 and a non-filtration surface with an elastic member fixed in a vertical stripe shape above the filtration surface. The cake is peeled by bending the filtration surface by the vibration of the filter cloth. can do.
Moreover, you may arrange | position an elastic member in the right-and-left both ends and center of a non-filtration surface.

In the filter cloth for filter press suspended between the filter plates of the filter press, which is configured by opening and closing a large number of filter plates in parallel on a pair of guide rails supported on the front frame and rear frame, the filter bed of the filter plate And a non-filtration surface with an elastic member fixed to the entire surface above the filtration surface, and the cake can be peeled by bending the filtration surface by the vibration of the filter cloth. .
The elastic member may be a member having a high modulus of elasticity than the filtering surface adhered cake.

The elastic member adds elasticity to the filter cloth by applying a resin to the non-filtering surface or sticking an elastic body to the non-filtering surface.

By attaching an elastic member to the non-filtering surface of the upper part of the filter cloth, it is possible to suppress the deflection at the upper part of the filter cloth during vibration of the filter cloth and transmit the vibration to the cake adhering part more effectively and more directly. The filtering surface has undulating vibrations, and even small vibrations are possible and move in a complicated manner, so that the peelability of the cake is increased. Further, since the elastic member is attached only to the non-filtering surface on the upper part of the filter cloth, the manufacturing cost can be reduced and the work at the time of assembly / disassembly can be simplified.

Side view of filter press according to the present invention Similarly, the side view of the filter cloth suspended from the filter plate Similarly, front view of filter plate of filter press Similarly, front view of filter cloth of filter press Side view of filter cloth during vibration with conventional filter cloth structure Detailed view of filter cloth during vibration in conventional filter cloth structure Side view of filter cloth during vibration in filter cloth structure according to the present invention Detailed view of filter cloth during vibration in the filter cloth structure according to the present invention

FIG. 1 is a side view of a filter press according to the present invention. The filter press 1 supports a plurality of filter plates 5 on a guide rail 4 bridged between a front frame 2 and a rear frame 3 so as to be freely opened and closed. ing. A movable head 6 is disposed at the rear end of the parallel filter plates 5... The filter plate 5 is slidably opened and closed along the guide rail 4 by the movable head 6.
A filter cloth 8 is suspended from both sides of the filter plate 5 so as to cover the surface of the filter bed 7. When the filter plate 5 is closed, the filter cloth 8 is sandwiched between the filter plates 5, and a filtration chamber 9 is formed between the pair of filter cloths 8, 8 covering the filter bed 7 of the filter plate 5.

A tightening cylinder 10 supported on the rear frame 3 is connected to the movable head 6. The tightening cylinder 10 expands and contracts to move the movable head 6 to perform tightening when the filter plate 5 is opened and closed. The filter plate 5 in parallel with the movable head 6 is connected by a transition chain (not shown) so as to open at a predetermined interval.
When the stock solution is pressed into the filtration chamber 9 formed by the closed filter plate 5, the filtrate passes through the filter cloth 8 and is discharged to the outside. The solid matter captured by the filter cloth 8 is dehydrated while forming a cake layer in the filtration chamber 9. After the dehydration is completed, the clamping cylinder 10 is contracted to open the filter plate 5 and discharge the cake 11.

FIG. 2 is a side view of the filter plate and the filter cloth suspended from the filter plate. FIG. 2A is a state in which the filter plate 5 is closed, and the filtrate is pressed into the filtrate supply path 12 in the filtration chamber 9. Separated to form cake 11. A pair of stands 13 for suspending the filter cloth 8 is disposed on the left and right shoulders of the filter plate 5, and a spring 14 for hanging the filter cloth 8 is suspended from the upper end of the stand 13.

(B) The cake 11 adheres to the filter cloth 8 suspended from the filter plate 5 in a state where the filter plate 5 is opened. A filter cloth core 15 is attached to the upper end of the filter cloth 11, and the filter cloth 8 is suspended by connecting the filter cloth core 15 to the lower end of the spring 14 that is suspended from the stand 13. The lower end portion of the filter cloth 8 is locked to the filter plate 5 below the filter plate 5.
A pair of opposing filter cloths 8 and 8 suspended between the filter plates 5 and 5 connect the filter cloth cores 15 to each other by a connecting tool 16 such as a chain. The connector 16 is shorter than the space between the filter plates 5 and 5 when the filter plate 5 is opened, and when the filter plate 5 is opened, the filter cloth cores 15 pull each other at the connecting portion. Tilt inward.

The filter cloth core 15 is vibrated by a vibration device 17 such as an air cylinder, and the filter cloth 8 suspended on the filter cloth core 15 is vibrated by operating the vibration device 17. Further, the vibration is amplified by the spring 14, and the filter cloth 8 vibrates more greatly. The cake 11 attached to the filter cloth 8 is peeled off when the filter cloth 8 is vibrated by the vibration device 17, and is discharged downward.

FIG. 3 is a front view of the filter plate of the filter press, and a stand 13 for suspending the filter cloth 8 is erected on the shoulders on both sides of the filter plate 5. The filter cloth 8 is suspended from the upper end of the stand 13 by a spring 14. The filtration bed 7 of the filter plate 5 is provided with a stock solution supply path 12 for supplying the stock solution to the filtration chamber 9 formed between the filter plates 5.

FIG. 4 is a front view of the filter cloth of the filter press. A bag portion 19 is formed on the upper edge portion of the filter cloth 8, and a filter cloth core 15 is inserted into the bag portion 19. The filter cloth mandrel 15 hangs the filter cloth 8 by being connected by a spring 14 to the upper end of a stand 13 disposed on both shoulders of the filter plate 5. When the filter plate 5 is closed, the surface of the filter plate 5 that is in contact with the filtration bed 7 is used as the filtration surface 20, and the seal surface 21 around the filtration surface 20 is sandwiched by the filter plate 5. The filtration surface 20 is provided with a supply port 18 for supplying a stock solution.

An elastic member 23 is disposed on the non-filtering surface 22 of the upper part of the filter cloth 8 suspended from the filter cloth core 15, and the elastic modulus is higher than that of 20 parts of the filtering surface. The elastic member 23 has sufficient elasticity to suppress the deflection of the filter cloth 8 during vibration, and is arranged vertically from the upper end to the lower end of the non-filtering surface 22 at the left and right ends and the center of the non-filtering surface 22. Further, the elastic members 23 arranged at both the left and right ends may be arranged to extend to the vicinity of the upper end of the filtration surface 20. Here, the elastic member 23 is restrained by bending of the filter cloth 8 by adhering to the stripes in the vertical direction.

The elastic member 23 attached to the filter cloth 8 prevents the non-filtering surface 22 from being bent, and when the filter cloth mandrel 15 is vibrated, the vibration is efficiently transmitted to the filter surface 20. The filtration surface 20 vibrates more than usual because the vibration on the non-filtration surface 22 is not attenuated, and is effective for peeling the cake 11. The elastic member 23 may be made of any material as long as it gives elasticity to the upper portion of the filter cloth 8, and an elastic body such as a resin, a thin metal plate, or glass fiber can be used. If a sealing material such as resin is used, it can be extended to the upper end of the filtration surface 20 regardless of the seal surface 21.

As for the arrangement position, in addition to sticking an elastic body to a part or the entire surface of the non-filtering surface 22 above the filter cloth 8, bending of the non-filtering surface 22 is suppressed by applying a sealing material to the same place. The elastic member 23 may be arranged in any way as long as it has only elasticity.

FIG. 5 is a side view of the filter cloth during vibration in the conventional filter cloth structure. When peeling is performed by vibration with the conventional filter cloth 8, the cake 11 is adhered when the filter cloth core 15 is vibrated. If the entire filter cloth 8 vibrates like the one filter cloth 8 that is not, the ideal separation is performed. However, when the other filter cloth 8 with the cake 11 adhering to the filtration surface 20 vibrates, the filter cloth 8 vibrates only at the non-filtration surface 22 above the filter cloth 8. This is because the filtration surface 20 of the filter cloth 8 is less likely to vibrate due to the elasticity of the attached cake 11, and the vibration is absorbed by the filter cloth 8 being bent by the non-filtration surface 22 above the filter cloth 8. Therefore, since it does not vibrate efficiently on the filtration surface 20 of the filter cloth 8, the cake 11 is not peeled off well.

FIG. 6 is a detailed view of the filter cloth during vibration in the conventional filter cloth structure. When the filter cloth mandrel 15 is lowered by the vibration device 17 as shown in (a), the non-filtering surface 22 of the filter cloth 8 has a low elastic modulus , and the filter surface 20 has a high elastic modulus by the cake 11, so that the elasticity is high. The change concentrates on the portion where the rate is low , and the non-filtration surface 22 is bent. Therefore, no vibration is transmitted to the lower side, and no vibration occurs on the filtration surface 20.
Further, as shown in (b), even when the filter cloth core 15 rises due to the restoration of the spring 14, the non-filtering surface 22 that has been bent is extended, so that the filtration surface 20 does not rise and vibration does not occur.

FIG. 7 is a side view of the filter cloth at the time of vibration in the filter cloth structure according to the present invention. The filter cloth 8 according to the present invention is unfiltered on the upper part of the filter cloth 8 which was only bent by the conventional filter cloth 8. the elastic member 23 is disposed on the surface 22, to enhance the elastic modulus of the filter cloth 8. When the filter cloth mandrel 15 is vibrated, the filter cloth 8 does not generate vibration on the non-filtering surface 22 on the upper side of the filter cloth 8 like the one filter cloth 8 to which the cake 11 does not adhere, and the filtration surface 20. Will wave due to vibration. Even in the other filter cloth 8 to which the cake 11 is attached, the elastic member 23 does not bend on the non-filtering surface 22 above the filter cloth 8 . Therefore, the filter cloth begins to wave due to vibration from the portion of the filtration surface 20 where the elastic member 23 is not disposed.

FIG. 8 is a detailed view of the filter cloth at the time of vibration in the filter cloth structure according to the present invention. Since the rigidity of the non-filtration surface 22 of the filter cloth 8 is enhanced by the elastic member 23, the rigidity is higher than that of the filtration surface 20 to which the cake 11 is adhered. Therefore, when the filter cloth core 15 is lowered by the vibration device 17 as shown in (a), the non-filtering surface 22 is not bent and the filtering surface 20 is waved.
When the filter cloth core 15 rises due to the restoration of the spring 14 as shown in (b), the deflection of the filtration surface 20 is extended, and peeling is promoted by the change of the cake 11 adhesion surface. If vibration is repeatedly performed by the vibration device 17, vibration is directly transmitted on the filtration surface 20 of the filter cloth 8, so that the filtration surface 20 can be vibrated efficiently. A complicated vibration that undulates only on the filtration surface 20 occurs, and the cake 11 is peeled off by vibration different from the conventional one.

The filter cloth of the filter press according to the present invention increases the elasticity of the non-filtering surface by disposing an elastic member on the non-filtering surface of the filter cloth. For this reason, when the cake is peeled by vibrating the filter cloth, no vibration is generated on the non-filtering surface, and the vibration is directly transmitted to the filtering surface. The non-filtering surface with high elasticity can also prevent the vibration from being attenuated, and can efficiently transmit the vibration to the filtering surface and peel the cake attached to the filter cloth. Therefore, it is suitable as a filter press for use in production processes and industrial wastewater containing a large amount of minerals, and can also be used in tap water, industrial sludge, chemical plants, etc., and can be used in cakes with poor peelability.

DESCRIPTION OF SYMBOLS 1 Filter press 2 Front frame 3 Rear frame 4 Guide rail 5 Filter board 7 Filter bed 8 Filter cloth 11 Cake 20 Filter surface 22 Non-filter surface 23 Elastic member

Claims (6)

Suspended between the front frame 2 and the filter plates 5,5 of the rear frame a pair of which are支架three guide rails 4, 4 to a number of filter plates 5 filter press 1 the ... constructed in parallel openably In the filter cloth 8 for the filter press
A filtration surface 20 that contacts the filtration bed 7 of the filter plate 5 and performs solid-liquid separation;
A non-filtration surface 22 having an elastic member 23 fixed in a vertical stripe shape above the filtration surface 20;
A filter cloth for a filter press, wherein the filter 11 is bent by vibration of the filter cloth 8 and the cake 11 is peeled off .
The filter cloth for a filter press according to claim 1, wherein the elastic member (23) is disposed at both the left and right ends and the center of the non-filtration surface (22). A plurality of filter plates 5... Are suspended in parallel between a pair of guide rails 4 and 4 supported by the front frame 2 and the rear frame 3 so as to be openable and closable. In the filter cloth 8 for the filter press
A filtration surface 20 that contacts the filtration bed 7 of the filter plate 5 and performs solid-liquid separation;
A non-filtration surface 22 having an elastic member 23 fixed to the entire upper surface of the filtration surface 10;
A filter cloth for a filter press, wherein the filter 11 is bent by vibration of the filter cloth 8 and the cake 11 is peeled off . The filter cloth for a filter press according to any one of claims 1 to 3 , wherein the elastic member 23 is a member having a higher elastic modulus than the filtration surface 20 to which the cake 11 is attached. The filter cloth for a filter press according to any one of claims 1 to 4 , wherein the elastic member (23) is a resin and applied to the non-filtration surface (22). The filter cloth for a filter press according to any one of claims 1 to 4 , wherein the elastic member (23) is an elastic body and is adhered to the non-filtration surface (22).

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