JPH11319422A - Filter cloth for filter press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a filter cloth extending bar material from falling off from filter cloth, and also to facilitate the operation for taking in/out the bar material. SOLUTION: In this filter cloth for a filter press, a filter cloth-extending bar material 13 is fitted to each lower edge of filter cloth 10 for covering the front and rear filter surfaces of a filter plate. In this case, along each lower edge of the filter cloth 10, a bar material-housing bag part 11 is disposed, and sealing members 14a, 14b which can be opened and closed are provided on both ends or one end of the bar material housing bag part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter cloth used for a filter press for extending and fixing a filter cloth on a filter plate.

[0002]

2. Description of the Related Art A filter press is used by spreading a filter cloth on a filter plate.
As shown in (B), a plurality of filter plates 2 each having a groove formed on each side serving as a flow path for the filtrate and coated with a filter cloth 1 are arranged, and the object to be filtered is between the filter cloths. A single filter press for press-fitting the slurry for filtration, and a filter cloth 1 having grooves formed on both sides as channels for filtrate as shown in FIGS. 1 (C) and 1 (D).
The filter frame 3 for securing a filter chamber of a predetermined volume is placed between the filter plates 2 covered with and spread, and a double filter press for filtering by filtering a slurry to be filtered into the filter frame 3 is provided. is there.

[0003] Further, as shown in FIG.
There is a type called a center feed type filter press in which is spread above the filter plate 2. In addition, top feed type filter press with mud holes arranged above filter plate and bottom feed type filter press with mud holes arranged below filter plate respond to diversification of slurry and improve cake discharging work. It has been developed and used from the viewpoint of the above.

[0004] The filter cloth stretched on the single-type filter press or the double-type filter press is stretched above and below the filter plate to separate the filter cake from the filter cloth after the filter plate is released (open plate). The device has been devised to make it easy to drop and discharge.

In particular, as means for projecting the filter cloth downward, the lower end portion of the filter cloth is folded upward, and sewn and adhered to the filter cloth body to form a bar material storage bag portion. In some cases, a filter material overhang bar made of various materials may be inserted.

Stretching the filter cloth downward is effective in preventing the generation of wrinkles in a direction transverse to the vertical direction of the filter cloth. Furthermore, the lower end of the filter cloth may be swung up and folded up by the air flow such as the shock when the filter cake is detached from the filter cloth or the wind in the outdoors. In the worst case, when the bent part of the filter cloth is sandwiched between the filter plates and the slurry or the filtrate squirts from that part and poor filtration occurs, or the surroundings are stained,
Although the filter cloth may be damaged, it is effective to stretch the filter cloth downward to prevent these losses.

[0007] A bar for overhanging the filter cloth is inserted into a bag for storing the bar formed at the lower end portion of the filter cloth. As a result, the balance of the downward protruding force of the filter cloth may be lost, and wrinkles may be formed on one side of the filter cloth, leading to the same trouble as described above.

For this reason, a longer bar is used to wrap or tie a tape or string around the protruding portion of the bar so that the bar protrudes outward from the opening at both ends of the bar storage bag. It was common practice to wind and secure the wire to prevent the bar from moving.

[0009]

However, the work of winding a string or wire around the projecting portions at both ends of the bar and the work of removing the filter cloth at the time of changing the filter cloth are work in a narrow site, and are performed in an unstable posture. In some cases, it is very troublesome, and fixing with a string or a wire is apt to be incomplete. In many cases, the role of fixing a bar with a string or a wire is not fulfilled.

[0010] To improve this point, Japanese Patent Application Laid-Open No.
No. 108509 has been proposed.

As shown in FIGS. 2A and 2B, the above proposal proposes a pair of filter cloths 1 covering both front and rear filtration surfaces of a filter plate 2.
In a filter press in which a filter cloth hanging rod 4 is inserted into each upper edge of the filter cloth 1 and a filter cloth overhanging rod 5 is inserted through each lower edge of the filter cloths 1 and 1, each filter cloth 1 is filtered. It is composed of a main body 1a and a folded cloth portion 1b connected to the lower end of the main body 1a. The upper end of the folded cloth portion 1b is connected to the filter cloth main body 1a, and the folded cloth portion 1b and the lower end of the filter cloth main body 1a opposed thereto. The bar portion storage bag portion 1d is formed by the cloth portion 1c, and the lower halves of both left and right ends of the bar material storage bag portion 1d are closed by bar material escape preventing end wall portions 1e and 1e, respectively. In half,
Openings 1f, 1f for dropping the bar are provided, respectively, and the filter material overhanging bar 5 inserted and dropped from one of the openings 1f is provided in substantially the entire length in the lower half of the bar storage bag 1d. Example in which the rod material is inserted over the opening 1
An example in which f is formed only on one side is introduced.

However, the proposal of Japanese Patent Application Laid-Open No. 9-108509 has the following problems. That is, the lower halves of the left and right ends of the bar storage bag 1d are the end walls 1 for preventing the bar from falling off.
e and 1e, respectively, and the bar lowering openings 1f and 1f are provided in the upper half thereof, so that the bar storing bag 1d provides a space for at least two filter cloth extending bars. There is a need. Therefore, when it is necessary to replace the filter cloth (for regeneration or replacement) or when removing the rod from the filter cloth for maintenance and inspection of the filter, remove the rod from the outside of the bag storage bag. The bar must be lifted from the lower half of the bag to the upper half of the bar drop-in opening so that the bar can be taken out from the opening.
The granular solids in the slurry often penetrate into and around the filter cloth overhanging rod dropped into the lower half of the bar storage bag, and the filter cloth overhanging rod It may be difficult to carry out the filter cloth tension rod to the opening part by entangled between the filter cloth and the fibers of the filter cloth forming the bag part, and remove the filter cloth overhanging rod material. The work is quite difficult and cumbersome. Further, since a filter cloth for forming a bag material storage bag portion for at least two filter cloth overhanging rods is required, an unnecessary increase in the size of the filter cloth is required. The above problems remain.

The present invention solves the above problems, and provides a filter cloth for a filter press which can prevent the rod for extending the filter cloth from falling off from the filter cloth, and can also facilitate the insertion and removal of the rod. It is intended to be.

[0014]

In order to achieve the above object, the present invention relates to a filter press for mounting a filter cloth overhanging bar on each lower edge of a filter cloth covering both front and rear filtering surfaces of a filter plate. In the filter cloth, a bar storage bag is provided along each lower edge of the filter cloth, and a sealing member that can be opened and closed is installed at both ends or one end of the bar storage bag.

[0015] In this way, since the bar storage bag is sealed at both ends with a sealing member that can be opened and closed, the filter cloth overhanging rod from the filter cloth is used during use. At the same time, the bar is prevented from falling off, and when the bar is taken out, by opening the sealing member, the bar can be pulled out horizontally and the bar can be easily taken in and out. In addition, the bar storage bag portion only needs to provide a space for one bar, the amount of filter cloth used can be reduced, and the intrusion of the powdery and granular solids in the slurry into the interior can be reduced. Adhesion around the bar can also be reduced.

The bag material storage bag is formed by folding the lower end of the filter cloth upward to form a loop, or by installing another cloth along the lower end of the filter cloth.

The openable and closable sealing member installed at both ends or one end of the bar storage bag portion can be constituted by a surface-adhesive fastener or a binding band with a locking member which can be repeatedly opened and closed.

[0018]

3 (A), 3 (B) and 3 (C) are front views of a lower half of a filter cloth, a longitudinal sectional side view of a central part and a longitudinal sectional side view of an end showing a first embodiment of the present invention. In this first embodiment, the filter cloth 1 extends below the lower end 20a of the filter plate 20.
Then, the lower end 10a is folded back upward and joined to a suitable position of the filter cloth main body 10b by sewing, bonding, welding, or the like to form the bar material storing bag portion 11, and the inner side is formed near the left and right ends. And a pair of openable and closable sealing members 14a and 14b are installed facing each other by sewing or bonding. The cross-sectional shape of the bar storage bag 11 may be an arc, an ellipse, or a double parallel depending on the degree of softness and rigidity of the filter cloth 10.

After the dedicated member 13 is inserted from one end into the bar storage bag part 11, the sealing members 14 a and 14 b are closed, and the sealing members 14 a and 14 b are closed. It serves to prevent the bag portion 11 from protruding outside from both ends and falling off. In this embodiment, as the sealing members 14a and 14b which can be opened and closed, a surface adhesive type fastener such as a Velcro fastener or Velcro fastener (both are trade names) is used.

The sealing members 14a and 14b installed on the inside near the both ends of the bar storage bag 11 are:
When the bar 13 needs to be removed from the filter cloth 10 because it can be freely opened and closed by human power, the closed closing members 14a and 14b are grasped and opened with fingers to open the bar storage bag portion. The bar 13 stored in the inside 11 can be easily pulled out by grasping it with a finger or the like.

FIG. 4 is a front view of a lower half portion of a filter cloth according to a second embodiment of the present invention, wherein one of both ends of a bar material storing bag portion 11 is closed by sewing or bonding. In this embodiment, a pair of openable and closable sealing members 14a and 14b similar to those in the above-described embodiment are installed by sewing or bonding. This applies when the place of insertion and removal of the bar 13 is limited to one side of the filter.

FIG. 5 is a front view of the lower half of a filter cloth showing a third embodiment of the present invention. A pair of releasable sealing members 14a and 14b are partially installed in the lower half of the sealing member. The positions of the sealing members 14a and 14b in the vertical direction and the length in the vertical direction are determined when the bar 13 moves up and down or left and right due to the vibration of the filter cloth 10 or the like, and the both ends of the bar 11 for storing the bar. It is set appropriately considering that it does not protrude from and fall. The sealing member 1 according to the third embodiment.
4a and 14b may be installed at only one end, and the other end may be closed by sewing or bonding as in FIG. 4 to form a closed portion 11a.

FIGS. 6A and 6B are front views of a lower half portion of a filter cloth showing a fourth embodiment of the present invention. 11, openable and closable sealing members 14a, 14b for sealing the both ends from the outside
Is installed via the closing flap 14c. That is, as shown in FIG. 6B, the closing flap 14c
Has one end fixed to one surface of the front and back surfaces of the bar storage bag portion 11 by sewing or bonding, and the other sealing member 14a is fixed to the other end by sewing or bonding, and the other. The sealing member 14b is fixed to the other surface of the bar storage bag portion 11 by sewing or bonding. In the case of the fourth embodiment, one end of the bar storage bag portion 11 may be a closed portion 11a, and only the other end may be configured to be openable and closable. Further, the sealing members 14a and 14b and the closing flap 14c may be provided only in the lower half of the opening at both ends of the bar storage bag 11.

FIG. 7 is a front view of the lower half of a filter cloth according to a fifth embodiment of the present invention. Hole 11b penetrating through
Are formed in two stages in the up-down direction, and the locking tool 1 is inserted into the small hole 11b.
The bundling bands 14e with 4d are respectively inserted and bound so as to seal the openings at both ends of the bar storage bag 11. Only one small hole 11b may be formed at the center in the vertical direction or slightly below and sealed with one binding band 14e to prevent the rod 13 from coming off. Also in this case, one end of the bar storage bag 11 may be a closed portion 11a, and only the other end may be opened and closed by the binding band 14e. The binding band 14e
Exemplifies the case of using the product name “Tie Wrap” of Japanese origin, but other similar members may be used.

FIG. 8 is a front view of a lower half portion of a filter cloth showing a sixth embodiment of the present invention. In the sixth embodiment, buttons 14f are provided at both ends of a bar storage bag portion 11. Button holes 11c are provided in two upper and lower stages so as to seal the openings at both ends of the bar storage bag 11. Note that a goby or hook hook of a tabi may be used instead of the button 14f. Further, the number of the button 14f and the button hole 11c may be only one.

The bar storage bag 11 is shown in FIG.
To (J). First, FIG.
(B), the upper ends of the two separate cloths 15a and 15b are overlapped and sewn so as to sandwich the lower end of the filter cloth 10 around the lower end thereof.
The loops are formed by sewing the lower ends of 5a and 15b.

FIGS. 9 (C) and 9 (D) show one sheet of another cloth 15c.
Is folded in two to form a loop, and the upper part thereof is
Is sewn on the lower end of the slab so as to sandwich it.

FIGS. 9 (E) and 9 (F) show the upper ends of two separate cloths 15a and 15b superimposed on one surface of the lower end of the filter cloth 10, and the lower ends of the separate cloths 15a and 15b. Are sewn to form a loop.

FIGS. 9 (G) and 9 (H) show one separate cloth 15c.
Is folded in two to form a loop, and the upper part thereof is
Of the lower end portion of the sewn portion.

FIGS. 9 (I) and 9 (J) show an example in which the upper end of another hose-shaped seamless cloth 15d is sewn on one surface of the lower end of the filter cloth 10.

The embodiment of the present invention is constituted as described above. In any of the above-mentioned embodiments, taking FIG.
The openable and closable sealing members 14a and 14b are installed at the left and right ends of the bar storage bag 11 provided at the lower end of the bar.
When inserting or removing 3, the sealing members 14a, 14b
By opening the bar, the bar 13 can be taken in and out horizontally, the operation of inserting and removing the bar 13 can be easily performed, and the bar can be reliably prevented from coming out during use. Further, the bar storage bag 11
Need only be provided with a storage space for one bar 13, and the amount of filter cloth used can be reduced. Therefore, it is possible to improve the efficiency of the work of attaching and detaching the bar 13 at a work site where space is restricted.

[0032]

As described above, according to the present invention,
Since the bar storage bag is closed at both ends by a sealing member that can be opened and closed, the filter cloth overhanging bar is prevented from falling off from the filter cloth during use, and the filter cloth overhang is prevented. When the bar is taken out, the bar can be easily taken out by opening the sealing member. In addition, the amount of the filter cloth used in the bar storage bag portion can be reduced, the amount of the powdery solids in the slurry entering the inside can be reduced, and the adhesion around the bar can be reduced.

[Brief description of the drawings]

1 (A) and 1 (B) are schematic illustrations of a conventional single-type filter press, (C) and (D) are schematic illustrations of a conventional double-type filter press, and (E) is a diagram of a conventional center-feed type filter press. FIG.

FIG. 2A is a schematic front view of a conventional filter press, and FIG. 2B is a schematic side view thereof.

FIGS. 3A, 3B, and 3C are a front view, a central vertical side view, and an end vertical side view of a lower portion of the filter cloth according to the first embodiment of the present invention.

FIG. 4 is a front view of a lower portion of a filter cloth according to a second embodiment of the present invention.

FIG. 5 is a front view of a lower portion of a filter cloth showing a third embodiment of the present invention.

FIG. 6A is a front view of a lower portion of a filter cloth showing a fourth embodiment of the present invention, and FIG. 6B is an enlarged cross-sectional explanatory view of an end sealing member in the fourth embodiment.

FIG. 7 is a front view of a lower portion of a filter cloth showing a fifth embodiment of the present invention.

FIG. 8 is a front view of a lower portion of a filter cloth showing a sixth embodiment of the present invention.

FIGS. 9A and 9B are a front view and a central longitudinal sectional side view of a lower portion of a filter cloth showing a first example of forming a bar storage bag portion according to the present invention, and FIGS. , A front view of the lower part of the filter cloth and a longitudinal sectional side view at the center showing a second example of forming the bar material storing bag portion in (A), (E) and (F) are third forming examples of the bar material storing bag portion in the present invention. And (G) and (H) are front views of a lower part of the filter cloth and a central longitudinal side view showing a fourth example of forming the bar storage bag part according to the present invention. Figures (I) and (J) are a front view of a lower part of a filter cloth and a central longitudinal side view showing a fifth example of forming a bar storage bag part according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Filter cloth 10a Lower end part 10b Filter cloth main body 11 Bar storage bag part 11a Closed part 11b Small hole 11c Button hole 13 Filter cloth overhang rod 14a, 14b Sealing member 14c Closing flap 14d Locking member 14e Binding band 15a , 15b, 15c, 15d Another cloth

Claims (5)

[Claims] 1. A filter press filter cloth in which a filter cloth overhanging rod is attached to each lower edge of a filter cloth covering both front and rear filtration surfaces of a filter plate, wherein the rod material extends along each lower edge of the filter cloth. A filter cloth for a filter press, comprising: a storage bag portion; and a sealing member that can be opened and closed at both ends or one end of the bar storage bag portion. 2. The filter cloth for a filter press according to claim 1, wherein the bar material storing bag portion is provided by forming a loop by folding a lower end of the filter cloth upward. 3. The bar material storing bag portion is formed by installing another cloth along the lower end of the filter cloth.
3. The filter cloth for a filter press according to 1.). 4. The filter according to claim 1, wherein the openable and closable sealing members provided at both ends or one end of the bar storage bag are surface-attached fasteners that can be repeatedly opened and closed. Filter cloth for press. 5. The filter press according to claim 1, wherein the openable and closable sealing member provided at both ends or one end of the bar storage bag portion is a binding band with a locking member. Filter cloth.