JPH03202105A - Filter plate structure of filter press - Google Patents

Abstract

PURPOSE:To enhance the efficiency of solid-liquid separation by forming a filter frame into a metal short cylinder and providing a filter plate main body made of rubber to the filter frame through the holder provided to the inner peripheral surface of the filter frame. CONSTITUTION:In the structure of the filter plate main body 9' made of rubber of a filter press supported by a filter frame 3' to form the contact surface of filter cloth 6', the filter frame 3' is formed into a short cylinder made of a metal. The filter plate main body 9' is provided to the filter frame 3' through the holder 13 provided to the inner peripheral surface of the filter frame 3'. As a result, it is possible to sufficiently seal the internal pressure generated between the filter frames when a liquid to be treated such as a slurry is sent under pressure at the time of the operation of the filter and the efficiency of solid-liquid separation can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the technical field of the structure of a filter plate of a filter press for solid-liquid separation of slurry such as waste liquid from various production factories and sludge from construction sites.

<Summary of the gist> The invention of this application is formed integrally with an adjacent filter frame so that the frame can be opened and closed, and the abutment surface of the filter cloth is provided on at least one side of both sides of the filter frame. This invention relates to a filter plate structure of a filter press in which a filter cloth is stretched with a filter frame facing in a compressed position. The frame is formed into an annular shape by cutting a pipe into rings at predetermined intervals, and is attached to the inner peripheral surface of the filter frame body using a ring-shaped holder made of iron or the like, or by providing a fitting groove. It is lightweight because it is attached to the filter frame through the holder.
It is supported by a disk-shaped filter plate body made of pressure-resistant rubber, or rubber with a metal mesh, resin, ceramic, or other core material interposed in a sandwich-like manner to form predetermined filtrate guide grooves. Furthermore, the filter fabric is provided with a support such as a recess notch or a pin for the filter fabric on at least one side of the holders on both sides provided in the filter frame, and a sealing body is provided by impregnating a pressing plate or resin. Or, alternatively, a filter cloth with holes such as perforations can be freely attached to and detached from the pin, and the filter cloth can be clamped at the peripheral side over the end face of the filter frame. An insertion hole for a supply pipe for the liquid to be treated is formed approximately at the center of the filter plate main body and the filter cloth, and a flange for the filter cloth or filter plate is provided to connect the adjacent filter. A supply pipe formed as a slit or the like is inserted through the supply hole for the liquid to be treated such as slurry with a length equal to or shorter than the interval between the plate bodies, and the slurry chamber is connected on the outside of the filter cloth, and the filtrate chamber is enclosed on the inside. This invention relates to a filter plate structure of a filter press that improves the operability of opening and closing frames while ensuring solid-liquid separation.

<Prior art> As is well known, as the lives of citizens have become richer, industrial activities have also flourished, and pollution problems have arisen in the manufacturing and construction industries, among others. Slurry such as sludge is discharged in a significant amount, and if it is discharged naturally, it will contaminate groundwater, seawater, rivers, etc., causing serious pollution problems.
The treatment of such slurry has become more important, and the solid-liquid separation of the slurry is being attempted, and the harmful solid parts are being incinerated, landfilled, etc., or recycled and used effectively, and solid-liquid separation efficiency has been improved. The so-called filter press is widely used because of various advantages such as high efficiency and reliable slurry processing.

Such a filter press has a base 1 as shown in FIG.
Stands 2 and 2 are erected on the
Cast metal filter frames 3, 3, . Due to the solid-liquid separation effect in the sandwiched and frame-tight state, the filtrate is discharged through the drain chute 7, and the cake is peeled off in a predetermined manner and removed by the opening of the frame.

As shown in FIG. 12, the filter plate 9 in the filter press 8 is provided with filtrate kite grooves 10, 10 on both sides of the filter plate 9, which is formed in each of the cast metal filter frames 3, 3... ...is radial,
Alternatively, a predetermined amount of slurry (not shown) supplied from the slurry supply port 12 is applied to the filter cloth 6 which is carved in a predetermined number in the vertical direction and connected to the filtrate discharge port 11 on the lower side and attached to the front and back surfaces thereof. The filtrate is fed under pressure at a high pressure to separate the solid and liquid, and the filtrate that is separated after passing through the filter cloth 6 is passed through the filtrate guide groove 1 of the filter plate 9.
0 to the filtrate outlet 11 for discharge,
The cake after solid-liquid separation is solidified between the filter frames 3, 3 through the filter cloth 6, and is peeled off and dropped when the frame is opened to be removed.

Therefore, each filter frame 3 must have considerable strength and rigidity due to the large tightening pressure applied by the hydraulic cylinder 5 to counteract the slurry pressure supplied at high pressure. As mentioned above, in general, the filter frame 3 and filter plate 9 are made of cast metal, as there is a risk that damage may occur during maintenance, inspection, maintenance, etc. or replacement, which could seriously impede the solid-liquid separation function. is being used.

<Problems to be Solved by the Invention> However, the filter plate 9 integrally formed with the filter frame 3 is not affected by the internal pressure caused by pumping slurry during operation of the filter press 8, which is applied vertically uniformly from both sides, or by the filter. The plate 9 needs to be strong enough to withstand excessive pressure, and the filter frame 3 needs to have enough strength to handle the clamping force to prevent slurry leakage. Since it is integrated, it is quite heavy and requires a lot of effort to move on the guide rail 4, resulting in poor workability and the disadvantage that it must be handled from the top of the furnace.

In addition, the load on the hydraulic cylinder 5 during frame opening and frame tightening is large;
This has the disadvantage of increasing power consumption and cost.

Furthermore, when solid-liquid separation is repeated in the filter press 8, the filter cloth 6 is pressed against the metal surface of the filter plate 9, and the durability of the filter cloth 6 deteriorates and wears out over time. The filter cloth 6 had to be replaced and washed frequently, which caused the inconvenience of significantly reducing maintenance and work efficiency at the top of the furnace.

<Object of the Invention> The object of the invention of this application is to solve the technical problem of operability and durability caused by the excessive weight of the cast filter plate of the filter press based on the above-mentioned prior art. The solid-liquid separation function can withstand high pressure and be lightweight without changing anything, reducing the operating power of the hydraulic cylinder not only for opening the frame but also for tightening the frame, and solid-liquid separation can be smoothly repeated as the liquid to be treated is supplied. It also makes it easier to attach the filter cloth, prevents it from falling off, makes it easier to peel off when opening the frame to remove a cake, etc., and makes it easier to attach the filter cloth during maintenance, inspection, etc. dissociable to facilitate handling;
It is an excellent filter that is easy to replace, has low power costs when opening and tightening the frame, and maintains the durability of the filter cloth and filter plate for a long time, benefiting the use of pollution control technology in various industries. The purpose is to provide a filter plate structure for a press.

<Means/effects for solving the problem> In accordance with the above-mentioned object, the invention of this application, which is summarized in the claims of the preceding patent, has a structure in which a filter frame made of a predetermined metal such as iron cuts a pipe into rounds of a predetermined width size. A short cylindrical filter frame body is created by the same process, and O-rings are provided on at least one of both sides of the frame to prevent leakage of the liquid to be treated. Continuously and intermittently grooved in the circumferential direction on the inner circumferential surface and made of lightweight, pressure-resistant rubber, etc., or a rubber mesh with a core material of hard resin, ceramic, etc. A disk-shaped filter plate body with a predetermined filtrate guide groove formed therein is fitted and fixed, or it can be installed integrally as a body or by using a separate holder for supporting the filter plate. A filter cloth that is attached continuously or intermittently in an annular shape so as to clamp and fix the filter plate body, and further has a pressing plate attached by attaching a sess notch to the fitting groove as a holder. support is freely available, or
When mounting the holder as a body, support pins etc. are attached at predetermined intervals in the circumferential direction, and a filter cloth with perforated holes etc. that can be freely engaged with and detached from the support pins is attached to both sides of the filter plate. A filtrate outlet is provided at the lower part of the inner circumferential surface of the filter frame body, which connects to the filtrate guide groove formed in the filter plate. Forms an insertion hole for the supply pipe of the liquid to be treated such as slurry, and attaches a flange to the filter plate body and the filter cloth so that the filter plate body and the filter cloth can be freely inserted through the insertion hole. The overall structure is simple and lightweight by slidably connecting supply pipes with slurry supply holes, such as slits with a length equal to or shorter than the spacing between the filter plates that form the space when tightening the frame. When the frame is closed, a specified amount of slurry is supplied from the central supply pipe, and the slurry is supplied at a specified pressure from the slurry supply hole between the filter plates formed by each filter frame, so that solid-liquid After separation, the filtrate filtered through the filter cloth exudes through the filtrate guide groove and is discharged from the filtrate discharge port of the filter frame main body in a predetermined manner, and the cake peels off and falls in a predetermined manner as the gap between the filter plates increases when the frame is opened. Technical measures have been taken to ensure that these are removed.

<Example> Next, an example of the invention of this application will be described below with reference to Figures 1 to 10 with reference to Figures 11 and 12.

Note that the same parts as those in FIGS. 11 and 12 will be described using the same reference numerals.

In the embodiment shown in Figs. 1 to 6, 3' is a filter frame of the filter press 8, which forms the main body of the filter frame unit I~ used in the filter press 8 as shown in Fig. 11. The filter frame 3' of each unit is created by cutting iron pipes (not shown) of the same diameter into rounds of set width sizes.

The filter frame 3' is integrally formed with a fitting groove 13 as a holder along the inner circumferential direction in the vicinity of the widthwise end thereof by a predetermined process, and a drain groove 14 is formed in the end surface portion of the filter frame 3'. is knurled, and the lower part is connected to the filtrate outlet 11 bored in the filter frame 3', and the I/i! 17 is provided so that the solid-liquid separated filtrate can be discharged.

In addition, a substantially semicircular ring groove 1 is provided on both end surfaces of the filter frame body 3'.
5.15 is formed, and an O-ring 16 is fitted on one side of the O-ring 16, which allows the filter frame bodies 3', 3', . . .
It is designed to provide a seal against leakage of filtrate.

Reference numeral 9' denotes a filter plate main body, which is formed in the shape of a disc with a predetermined thickness made of rubber, and a steel net 17 serving as a core material is embedded therein together with a ring 18, and is installed in the filter frame 3'. The filter frame 3' is integrally attached to the filter frame 3' by being fitted into the fitting groove 13 at its peripheral edge portion.

Then, as shown in FIG. 1, both sides 9A, 9 of the filter plate 9'
A predetermined number of filtrate guide grooves io, io, . A connecting pipe 22 provided with flanges 21 and 21 spaced apart by the thickness of the filter plate 9' is inserted into the insertion hole 20 and locked therein.

1. In addition, as shown in FIG. 9 at a3 when the filter plate 9' is attached to the filter frame 3', a groove 23 is provided which overhangs along the inner circumferential direction at approximately the center in the width direction of the filter frame 3'. Gb, on the other hand filter plate 9'
An enlarged edge 24 can be formed on the outer periphery and fitted into the groove 23.

Further, as shown in FIGS. 10a and 10b, a ring plate 25 made of metal or the like is provided around the insertion hole 20 in the center of the filter plate 9'.
25 as a side flow, or insert a collar 20' into the insertion hole 20.
An embodiment in which the connecting pipe 22 is inserted as a single-shaped pipe is freely possible.

A recess notch 26 is bored in the inner periphery along the end face of the annular fitting groove 13 formed inside the filter frame main body 3'.

As for the filter cloth 6', as shown in FIG.
An annular suppression plate 27 for the recess notch 26 is integrally attached to the outer periphery corresponding to the recess notch 26, and the plate portion is pressed against the recess notch 26, so that the filter cloth 6' can be freely removed. .

2. Furthermore, an insertion hole 20 for a connecting pipe 22 is provided in the center of the filter cloth 6', and a sealing body 28 is integrally attached to the inner peripheral edge of the filter cloth 6', which is impregnated with resin.

Therefore, the filter cloth 6' can be installed in the filter frame 3' or in the cess notch 26.
and the filter 156' to the flange 21 of the connecting pipe 22.
The suppressing plate 27 and the sealing body 28 are crimped and supported to prevent bending, displacement, etc. in the circumferential direction.

A supply pipe 29 of a pipe 19 for supplying the liquid to be treated connected to the supply port 12 is slidably fitted onto both ends of the connecting pipe 22, and a peripheral surface of the supply pipe 29 is fitted with an axially fixed pipe. Slits 30 are provided at predetermined intervals in the circumferential direction, and are used as supply holes for a liquid to be treated such as slurry. It is formed.

Note that notches are provided at both ends of the connecting pipe 22, so that when the supply pipe 30 slides as the filter frame 3' opens and closes, the connecting pipes 22 and 3 of the 22 connect to each other. It is designed to prevent blockage due to proximity.

A filtrate chamber 31 is formed inside the filter cloth 6' facing both sides of the filter plate body 9', and a slurry supply pipe 30 is connected to the outside so that when the frame is closed, the filter cloth 6' is closed. The slurry is pressed into the space of the slurry chamber 32 formed by the pressing.

In FIG. 1, mounting kites 33 are provided on both sides of each filter frame main body 3', and each filter frame main body 3' is mounted on the guide rail 4 of the device frame 2.2.
Similar to the conventional embodiment shown in the figure, when the frame is opened or tightened by the hydraulic cylinder 5, it can be slid back and forth via a chain (not shown) or the like.

In the above configuration, when each filter frame body 3' is clamped by the hydraulic cylinder 5 in the same way as in the conventional embodiment shown in FIG. The engagement of the ring 16 results in a sealed state.

A supply port 12 to which the slurry supply pipe 19 is connected
When a slurry (not shown) is supplied at a predetermined supply pressure from 4 to 4, the slurry is forced out through the slits 30, 30 connected between the respective filter frames 3' of the slurry supply pipe 19, and is transferred to each adjacent filter frame 3', The inside of the slurry chamber 32 between 3' and 3' is expanded under high pressure, pressing the filter plate 9', and in this process, the filtrate is filtered through the solid-liquid separation action and expands the filtrate chamber 31. Filter cloths 6', 6' are exuded and slurry chamber 3
The second layer solidifies into a cake and is separated.

The rubber filter plate 9' is reliably supported by the filter frame 3' and pressure is applied uniformly from both sides of the filter plate 9', so there is no displacement or deformation such as bending, and furthermore, the slurry is not pumped. Since the slurry is tightly sealed by the filter frame 3' against the high pressure at the time, solid-liquid separation can be performed efficiently.

Furthermore, as shown in FIGS. 5 and 6, even if there is a fluctuation in the internal pressure P in any of the slurry chambers 32 formed by the closed frame, the filter plate 9' is bent to absorb it, and the slurry supply is reduced over time. In the process, the internal pressure of each slurry chamber 32 is stabilized.

Furthermore, since the rubber used for the filter plate 9' has excellent pressure resistance5, it will not collapse under high pressure conditions. Only the liquid remains in the filtrate chamber 31 inside the filter cloth 6' and is discharged.

The solid-liquid separated filtrate in the filtrate chamber 31 due to the solid-liquid separation over time falls from the filtrate outlet 10 via the drain groove 14, is discharged in a predetermined amount by the gutter 7, and after a set time has elapsed. stops compressing the slurry, and opens each filter frame body 3' by the hydraulic cylinder 5 by sliding the mount guide 33 against the guide rail 4, whereby each filter frame body 3' is opened.
The debris (not shown) that was separated and remained in the slurry chambers 32, 32, between 3' and 32' separates and falls, and is constantly removed.Then, each filter frame main body 3' is tightened by the hydraulic cylinder 5, and the slurry is refilled. is compressed and the solid-liquid separation action is repeated.

During this time, as mentioned above, each filter plate main body 9' is manufactured to be extremely lightweight, so the power of the hydraulic cylinder 5 for opening and tightening the frame is small, and the filter plate main body 9' can be moved to a predetermined filter frame as needed at a predetermined timing. Even when the main body 3' is removed for replacement, maintenance, inspection, etc., the filter 6 plate main body 9' can be easily attached and removed, and the removal work for cleaning, replacing, maintenance, etc. on the filter cloth 6' is also extremely easy. It is.

At this time, the filter cloth 6' can be easily attached and detached from the filter frame main body 3' by peeling off and removing the suppression plate 27 and the seal body 28.

Next, while the filter plate 9' in the above-mentioned embodiment has a fitting groove 13 on the inner periphery of the filter frame 3' when it is connected to the filter frame 3', the embodiment shown in FIG. In place of the fitting groove 13, a ring-shaped attachment is made to the inner peripheral surface of the filter frame 3' by fixing the body 34 in two strips. The filter plate 9'' is supported while forming an abutting surface for the filter cloth 6I.

For mounting, support pins 35, 35, . The support pin 35.3 is also attached to the 7 flange 21 of the connecting pipe 22.
5... are provided at a predetermined number and spaced apart from each other at equal intervals, and in the filter cloth 6'', engagement holes 736 (not shown in the figure) for the support pins 35 are provided at the outer peripheral edge and the inner peripheral edge. It is attached to the filter plate 9'' and can be removed through the engagement hole 36.
By attaching and detaching the filter cloths 6'', it is possible to substantially facilitate replacement and removal of the filter cloths 6'' on both sides.

In addition, the ring-shaped attachment may be continuous over the inner circumference, or may be arranged and fixed alternately in partial lengths, and furthermore, the ring-shaped attachment may be attached to the inner circumference of the filter frame 3''. Needless to say, the fixation to the cover may be of a hook type, or may be formed integrally.

Furthermore, although the filter cloths 6' and 6' in the above-mentioned embodiment face the contact surface of the filter plate 9', as shown in FIG.
The filter cloth 6'' is large enough to be attached to the end surface of the filter frame 3', and the outer edge of each filter cloth stretched on both sides of the filter plate 9' is It is possible to support the filter frames 3' on the outside so that they are joined to each other using appropriate clampers. In addition to filter cloth 61
No. 8 It is made to be sealed by the tissue.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments. For example, the filter plate may be made of a hard resin or the like instead of a metal mesh. Of course, the plate body may be formed by interposing it in a rubber sandwich shape, or it may be made of rubber alone.Furthermore, the filter frame body may be rectangular or polygonal, or the filter frame may be formed into a rectangular or polygonal shape. The holder can be made into a sandwich of metal and resin rings, the holder can be attached and detached with a single touch by providing a hook on the inner circumferential surface of the filter frame, or it can be joined with another material. Any aspect can be adopted.

It goes without saying that the filter press to which the present invention is applied can be applied not only to sludge slurry from factories and construction sites, but also to the processing of slurries from foodstuffs, chemicals, medicines, and the like.

<Effects of the Invention> As described above, according to the invention of this application, in a high-efficiency filter press 9 that basically separates various slurries from solid to liquid, the filter plate is integrally formed and is extremely heavy. Instead of the conventional cast filter frame, the filter frame is made of a filter frame body made by cutting pipe material into rings of a predetermined width, making it easy to manufacture and process, reducing weight, and incorporating a holder on the inner circumference. The weight of the filter frame body is significantly reduced by providing a filter plate made of rubber or the like to be easily inserted, and the pressure resistance strength in the axial direction is sufficient for both the filter frame and the filter plate. Because of this, the movement of the hydraulic cylinder during frame opening and frame tightening is reduced, and the sealing function through O-rings etc. is perfect, which improves the solid-liquid separation function. effect is produced.

Therefore, by providing a fitting groove for the filter plate on the inner circumferential surface of the filter frame body and inserting the rubber disc-shaped filter plate body, or by attaching the body for fixation, the body is continuous in a ring shape. The filter plate is sandwiched between the body and the filter plate is installed intermittently to prevent internal pressure generated between the filter frame when slurry or other liquid to be treated is pumped during operation of the filter press. An excellent zero effect is achieved in that the solid-liquid separation efficiency can be improved by sufficiently blocking the particles.

By providing a holder on the inner peripheral surface of the annular filter frame and attaching the rubber filter plate, the filter plate is reliably supported by the filter frame and pressure is applied evenly from both sides. The filter frame firmly seals the slurry against the high pressure during pumping of the slurry, so solid-liquid separation is efficiently carried out, which is an excellent effect. .

Furthermore, since the filter plates are made of rubber, even if there is a fluctuation in the internal pressure in any of the slurry chambers formed by the closed frame, each filter plate will flex and absorb it, and over time it will be absorbed during the slurry supply process. Since the internal pressure of each slurry chamber is stabilized, the excellent effect of improving the operating rate of the filter press is achieved.

Furthermore, since rubber has excellent pressure resistance, it will not collapse under high pressure conditions, and the filter plate forms a strong contact surface with the filter cloth, allowing only the filtrate to pass through the filter cloth and stay inside, allowing for smooth drainage. The excellent effect of liquid is produced.

Furthermore, since the filter plate is made of rubber, the filter cloth 1 that comes into contact with the filter plate does not wear out, which has the advantage that the life and durability of the filter cloth is surely improved.

In addition, the filter plate can be easily attached and detached from the filter frame body, making it easier to carry out maintenance, inspection, maintenance, and replacement.The light weight of the filter frame and filter plate makes it easier to attach and detach for maintenance, inspection, and replacement. It has the advantage of being easy to maintain.

In addition, the initial cost and running cost are reduced by 1 or more due to the weight reduction of the filter frame body and the weight of the filter plate, making it possible to perform solid-liquid separation treatment of slurry such as industrial waste at low cost as a pollution treatment. There is.

Furthermore, since the filter plate can be molded with multiple and complex filtrate guide grooves by integrally molding rubber, it has an excellent effect of performing solid-liquid separation more efficiently than a filter plate formed by casting. be done.

Since the filter plate is integrally molded with rubber and the filtrate guide groove can be formed to be shallow or deep, the fins of the groove can be formed into a parapet shape, etc., so that the filtrate volume can be changed in design. Because of this ability, there is also a certain degree of freedom in being able to flexibly design the capabilities of the filter bracelet.

In addition, by detachably attaching another filter cloth, even if the filter cloth becomes clogged with cake due to peeling and removal of cake due to repeated opening and tightening over time, the filter cloth can be easily removed. It has an excellent effect of being able to recover immediately by replacing the filter cloth.

[Brief explanation of drawings]

1 to 10 are detailed explanatory diagrams of the invention of this application, in which FIG. 1 is a partially cutaway perspective view of one embodiment, FIG. 2 is a partially sectional side view of the same, and FIG. 3 is an enlarged partially sectional view. , FIG. 4 is a perspective view of the filter cloth, FIG. 5 is a cross-sectional view corresponding to FIG. 11, FIG. 6 is a cross-sectional view of the same operating state, and FIG. 7 is a connection between the filter plate and the filter frame in another embodiment. FIG. 8 is a perspective view of the assembly of the filter cloth with the filter frame of another embodiment, FIG. 9 is a partial sectional view of the assembly of the filter plate with the filter frame, and FIGS. 10a and 10b are another example. FIG. 11 is a schematic side view of a filter press based on the prior art, and FIG. 12 is a structural sectional view of the filter plate of the filter press. 3 3.3', 3'... filter frame, 6.6', 6', 6'... filter cloth, 10...
Contact surface (filtrate guide groove), 9.9', 9''...filter plate body, 13...fitting groove, 34...installation is done on body 4''1 Figure 12

Claims (6)

[Claims] (1) In a filter plate structure of a filter press that is supported by a filter frame and forms a contact surface of a filter cloth, the filter frame is formed into a short metal cylinder, and is provided on the inner circumferential surface of the filter frame. A filter plate structure for a filter press, characterized in that a rubber filter plate body is attached via a holder. (2) A filter plate structure for a filter press according to claim 1, wherein the holder is a fitting groove. (3) A filter plate structure for a filter press according to claim 1, wherein the holder is a mounting body. (4) A filter plate structure for a filter press according to claim 1, wherein a core material is interposed in the filter plate main body. (5) A filter plate structure for a filter press according to claim 1, wherein the core material is a metal net. (6) A filter plate structure for a filter press according to claim 1, wherein the core material is a plate made of hard resin.