JP3751362B2 - Filter press filter plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The disclosed technology belongs to the technical field of the structure of a filter plate of a filter press that solid-liquid separates slurry containing waste liquid from various production factories and sludge from a construction site.
[0002]
[Prior art]
As is well known, citizens' lives have become significantly richer, and along with this, industrial activities have flourished, but this has also caused pollution problems, including manufacturing, construction, etc. In particular, the amount of slurry discharged including factory effluent and sludge from various work sites becomes extremely large. As a result, the treatment of the slurry is regarded as important, the solid separation of the slurry is ensured, the liquid is made harmless and drained into the river, and the harmful solid part is incinerated landfill. The so-called filter press is widely used because of its various advantages such as high solid-liquid separation efficiency and reliable slurry processing. Yes.
[0003]
As shown in FIG. 2, the filter press has a pair of stands 2 and 3 erected on a base 1 and a cast filter plate 4, 4... The hydraulic cylinder 6 provided on the other stand 3 allows the frame to be opened and closed, and the filtrate due to the solid-liquid separation action in the frame-clamped state is predetermined via the drain chute 7. The cake is discharged, and the cake is peeled off and removed in a predetermined manner by the open frame.
[0004]
Thus, in the filter press, as shown in FIG. 3, each filter plate 4 has filtrate guide grooves 9 and 9 formed on both side surfaces of the filter plate main body 8 integrally having the cast filter frame main body as described above. ... Are radially or engraved in a predetermined number in the vertical direction and connected to the lower filtrate outlet 10 and supplied from the slurry supply port 12 to the filter cloth 11 attached to the front and back surfaces thereof. the slurry was pressed at a predetermined pressure during Wakushime the by solid-liquid separation, draining process led to the filtrate discharge exit 10 via a filtrate guide grooves 9 of the filtration plate main body 8 of the filtrate separated from the filter cloth 11 In this way, solid-liquid separation is performed.
[0005]
Therefore, each filter plate 4 must have a considerable strength and rigidity due to a large clamping pressure applied to each filter plate 4 by the hydraulic cylinder 6 for opposing the slurry supplied at high pressure. In addition, in order to prevent damage during the maintenance, inspection, maintenance, etc. and replacement, as well as during operation, so that the solid-liquid separation function is not significantly impaired, the filter frame is generally used as described above. The integral filter plate body 8 is made of a strong casting, and therefore has a disadvantage that it is a considerable weight, requires a large amount of power and labor for handling, and is troublesome in workability. The power used by the hydraulic cylinder 6 at the time of frame tightening is high. In addition to manufacturing, assembling takes a lot of man-hours, and there are disadvantages in that the cost is high and maintenance is difficult. there were.
[0006]
In order to deal with this, there is an invention of Japanese Patent Application Laid-Open No. 2-268804 which is the invention of the applicant's prior application, and not only the filter press can be easily manufactured by using a short cylindrical filter frame, To make practical use of a filter press that has the advantage of solid-liquid separation with a large pressing force using the pressure resistance of a circular cross section, easy to open and tighten frames, low running cost and good maintainability It is becoming.
[0007]
However, the seed filter press has a disadvantage that it is difficult to attach a mesh body such as a wire mesh or a filter cloth because the filter frame is formed into a ring-shaped short cylinder having a circular cross section.
[0008]
On the other hand, in the invention of Japanese Patent Application Laid-Open No. 3-202105, which is the applicant's prior invention, the edge portion of the filter cloth overhangs the flange around the short cylindrical filter frame having a circular cross section. Although the technology has been disclosed to improve the sealing performance to the slurry in general and to make the stripping operation easy, the filter cloth has a circular flat shape, so that the filter frame has a flange shape. When covering, not only is it difficult to sew the opposing filter cloth with staples, but there is a negative point that wrinkles are likely to occur and a complete cover state is difficult to appear.
[0009]
Furthermore, since the filter plate is formed in a rubber disk shape, there is a neck that the filter plate is easily deformed by the high pressure of the slurry during frame tightening. There was a demerit that the filter frame was displaced.
[0010]
[Problems to be solved by the invention]
The purpose of the invention of this application is to solve the problem of excessive weight of the filter plate in the filter press based on the above-mentioned prior art and the problem of attachment of the filter cloth to the filter plate, and the filter frame is lightweight and has high pressure resistance. The filter cloth is easy to install, the filter plate is uniformly arranged in the slurry chamber, the solid-liquid separation can be performed with high efficiency as designed, and the operation is easy to prevent pollution. We intend to provide an excellent filter press filter plate that will benefit the field of solid-liquid separation technology in industry.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the configuration of the invention of the present application, which is summarized in the scope of the above-mentioned claims along with the above-mentioned object, is used for solid-liquid separation of factory waste liquid and slurry from a construction site via a filter press.
A filter plate body having a hardness of 90 °, a spreading rate of 120%, etc. is formed in a disk shape on a ring-shaped short cylindrical filter frame having a predetermined number of circular cross-sections, and a boss for surface contact on the surface of the filter plate body. Are planted together,
A predetermined filter cloth is attached to the surface of the filter plate body through a mesh body made of synthetic resin,
The flange part is fixed to the filter frame via bolts and tightened.
And, the flange portion is provided with a T-type drainage pipe having both ends facing the mesh body and the filter cloth and the central portion facing the drainage port of the filter frame as a filtrate drainage passage,
In addition, the T-shaped drainage pipe is provided so as not to be misaligned via the spacer ring with respect to the flange portion of the rubber filter plate body,
The outer peripheral surface of the filter frame is provided with male and female pins for adjacent filter frames so that it can be centered and prevented from slipping in the circumferential direction, making it lighter than conventional cast filter plate structures. The frame is smoothly opened and tightened, and the solid-liquid separation operation of the slurry is performed as designed,
And Thus, a pipe of the slurry supply passage provided we are in the center of the filter plate slidable to the slurry supply pipe comprises a slit for supplying the slurry to the slurry chamber formed between Aitonaru filter plate Is connected to the slider
The slurry supply pipe is fitted to the corresponding filter plate via a flange through a mesh body and a filter cloth,
The T-shaped pipe is provided with technical means adapted to be attached to a flange of a rubber filter plate via a spacer ring.
[0012]
[Action]
Upon the slurry from factory effluent or construction site to solid-liquid separation through a filter press, slurry pumps supplied to the slurry chamber between each filter plate which is a frame clamped. At this time, although strongly濾枠another by hydraulic cylinders Ru is Wakushime, to eliminate the deflection and deformation of the filter plate bosses mutual Aitonaru filtration plate main body is a surface contact with the Wakushime pressure increase It is like that. Hand upon the frame clamping is male pin is positioned so as not to cause circumferential displacement or deviation of the filtration plate main body and濾枠through the female pin, frame clamping posture stable filter plate is adapted to be maintained.
In Wakushime posture, filtrate of the slurry passing through the filter cloth is via a T-shaped drainage pipe provided in the flange portion of the peripheral edge of the further filter plate through the mesh body, discharge the drainage port of濾枠Ru is liquid.
The filter frame has a semicircular cross-sectional notch fitted in adjacent portions, and an O-ring is fitted on one side thereof . Therefore, the sealing performance in the frame tightening process at the time of frame tightening between the filter frames is reliably maintained .
Cake remains in each slurry chamber, solid-liquid separation and open frame after the action was removed by dropping the cake fraction remaining in the slurry chamber and subjected to disposal of such appropriate incineration.
The filter cloth and mesh body are used for maintenance such as cleaning and replacement by dissociating bolts, the filter press has good operating efficiency, stable solid-liquid separation is performed as designed, and durability is improved. Not only the initial cost but also the running cost can be reduced.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the invention of this application will be described below with reference to FIGS. 2 to 3 and FIGS.
[0014]
2 and 3 will be described using the same reference numerals.
[0015]
In the illustrated embodiment, reference numeral 8 'denotes a filter plate main body that forms the center of the filter press filter structure that forms the gist of the invention of this application. For example, a hard rubber disc having a hardness of 90 ° and a spreading ratio of 120% or the like. Ru Jo filter plate body der.
The peripheral portion of the filter plate body 8 ′ is formed so as to form a flange portion 14 having a T-shaped cross section . Further , as shown in FIGS. 1 (A) and 1 (B), a slurry supply pipe 23 is set in a fitted state via flanges 24, 24 at the center of the filter plate body 8 ' . Further, on both side surfaces of the filter plate main body 8 ', a short cylindrical boss 22 is arranged in a ring arrangement in a predetermined number so as to prevent deformation of the adjacent filter plate main bodies 8', 8 'when the frame is tightened. They are provided at predetermined intervals. In the present embodiment , four bosses 22 are integrally planted and fixed.
A mesh body 9 'made of synthetic resin is attached to the surface of the filter plate body 8'. On the surface of the mesh body 9 ′, a predetermined filter cloth 11 ′ covers the flange 24 and the boss 22, and the peripheral edge thereof is bent integrally with the flange portion, and the casting filter frame 15 is connected via the bolt 18. The filter plate main body 8 ′ is set inside the filter frame 15.
[0016]
In the mesh body 9 ', as shown in FIG. 1 (c), a hole 23' through which the slurry supply pipe 23 at the center of the filter plate body 8 'is inserted and a hole 22' through which each boss 22 passes. A flange portion 91 that is fastened to the flange portion 14 via a bolt 18 is integrally formed in a ring shape at the peripheral portion.
[0017]
At the end of the slurry supply pipe 23, as shown in FIG. 1 (d), a slider 26 having a predetermined number of slits 25, 25... Is slidably fitted into a seal rod . . The slurry to be fed can be press-fitted and supplied to the slurry chamber 12 ′ between the adjacent filter plate bodies 8 ′ through the slit 25.
[0018]
As shown in FIG. 1 (b), an inlet portion for injecting and flowing the filtrate separated from the solid-liquid slurry through the filter cloth 11 'and the mesh body 9' is injected into the peripheral portion of the filter plate body 8 '. A T-shaped drainage pipe 27 that drains into the drainage port 10 ″ of the filter frame 15 as shown in FIG. It is fitted and set via ' . The drainage port 10 ″ on the inner side of the filter frame 15 is connected to the corresponding outer ring-shaped drainage port 10 ′ via the liquid passage hole 13.
[0019]
Note that one or a predetermined number of T-shaped drainage pipes 27 can be disposed only in the lower portion of the filter plate body 8 '.
[0020]
A notch 16 having a semicircular cross section is formed on both sides of the filter frame 15, and an O-ring 17 is fitted on one side thereof. Thereby, the sealing performance with respect to the slurry when the filter frame 15 is tightened is sufficiently ensured.
[0021]
The T-shaped drainage pipe 27 is ringed to the flange portion 14 of the filter plate main body 8 ′ in order to prevent the centering of the drainage outlet 10 ″ from being adjusted or fluctuating when being set in the filter frame 15. A metal-made spacer 27 ′ is screwed and fitted so that the positioning centering of the T-shaped drainage pipe 27 with respect to the drainage port 10 ″ is securely held.
[0022]
As shown in FIG. 1 (b), rail guides 5 'and 5' are fixed on the peripheral surface of the filter frame 15, and male pins 19 and female pins 20 are fixed to face each other. Accordingly, the filter frame 15 is positioned in the lateral direction at the time of initial setting, and performs the function of preventing slippage in the circumferential direction.
[0023]
In the above configuration, a resin mesh body 9 ′ is attached to the surface of each filter plate main body 8 ′ (the slurry supply pipe 23 and the bosses 22 are inserted into the insertion holes 23 ′ and 22 ′ at the time of the attachment. Therefore, the filtrate guide groove 9 or the like for the surface of the conventional filter plate body 8 is not engraved, and therefore the filter plate body 8 ' A state where the strength is insufficient will not appear.
[0024]
Then, a filter cloth 11 ′ is attached to the surface of the mesh body 9 ′ so as to cover the flange 24 and the boss 22 of the slurry supply pipe 23, while the mesh body is attached to the peripheral edge of the filter plate body 8 ′. 9 'and a T-shaped drainage pipe 27 with the inlet portions of both ends facing the filter cloth 11' are set on the flange portion 14 of the filter plate body 8 'via a ring-shaped spacer 27'. The filter frame 15 in which the O-ring 17 is fitted to the notch 16 is integrally fixed together via bolts 18 and 18.
[0025]
Of course, the male pin 19 and the female pin 20 are integrally provided in advance on the outer peripheral surface of the filter frame 15.
[0026]
When the filter press is initially set, each filter plate main body 8 ′ is brought into a posture state where the adjacent bosses 22 of the adjacent filter plate main bodies 8 ′ face each other, and each slurry supply pipe 23 is provided with a slider 26. To fit. At the same time, the male pin 19 of the filter frame 15 is inserted and set in the female pin 20 of the adjacent filter frame 15, and the O-ring 17 comes into contact with the ring-shaped notch 16 of the adjacent filter plate body 8 ′ to show a sealed state. Make it out . This completes the initial setting of the filter press.
[0027]
At that time, rail guides 5 ′ and 5 ′ provided on both sides of the filter frame 15 are placed on the rail 5 so as to be slidable in the axial direction. The slurry is fed through the supply pipe 23 in a predetermined manner . Then, the slurry is supplied to the slurry chamber 12 ′ between the adjacent filter plate bodies 8 ′ and 8 ′ via the slit 25 of the slider 26, and when the frame is tightened via a hydraulic cylinder (not shown), each slurry chamber 12 ′. The slurry is surely sealed by the O-ring 17 of the filter frame 15 abutting against each other and does not leak, and the pressurized slurry passes through the filter cloth 11 ′ and is made of a resin mesh body 9 ′. Through the T-shaped drainage pipe 27 and supplied to the drainage port 10 '' on the inner side of the filter frame 15, via the liquid passage hole 13, via the drainage port 10 'on the outer side, through a tray (not shown), The filtrate is discharged in a predetermined manner.
[0028]
In pressurized state for this period of slurry,濾枠15 are pressed in the axial direction by the hydraulic cylinders, Ru is ensured that the sealing property by O- ring 17. Moreover, the fitted against female pin 20 of the male pin 19, displacement in the axial direction and the circumferential direction Ru is prevented. Further, the deformation of each filter plate main body 8 'is prevented by the contact between the bosses 22 and 22, the solid-liquid separation action is performed stably, and the T-shaped drainage pipe 27 is also formed by the ring-shaped spacer 27'. There is no variation in positioning, and the solid-liquid separation action of each filter plate main body 8 'is performed stably as designed.
[0029]
When the pressure of the hydraulic cylinder is increased during the solid-liquid separation action, the bosses 22 of the filter plate main bodies 8 'are crushed to each other, but the slurry passes through the gaps between the bosses 22 and the T-type exhaust is discharged. The filtrate is surely drained from the liquid pipe 27.
[0030]
Even if the pressure applied to the hydraulic cylinder is increased to 40 atm or 100 atm, the compression deformation due to the contact of the bosses 22 and 22 absorbs this, and the filter plate body 8 'is deformed from the initial set posture. There is no misalignment, and a stable solid-liquid separation action is ensured.
[0031]
Accordingly, the filter plate main body 8 'can be formed in a lightweight and small size without being made of a heavy weight such as a casting integrally formed with the filter frame 15 as in the conventional mode shown in FIG. The solid-liquid separation action is not different from the conventional mode, or is performed more efficiently than the conventional mode.
[0032]
The number of the bosses 22, 22... Can be appropriately increased according to the size of the filter plate main body 8 ′ depending on the design.
[0033]
When the solid-liquid separation action is completed, the frame is opened via the hydraulic cylinder, and the cake remaining in the slurry chamber 12 'falls from the slurry chamber 12' of the opened filter plate bodies 8 'and 8'. It is then removed and used for incineration and disposal.
[0034]
After removing the cake , the bolt 18 is removed when the filter cloth 11 'and the mesh body 9' are washed or replaced , and the mesh body 9 'and the filter cloth 11' are further connected to the flange portion of the filter plate body 8 '. It is appropriately removed from 14 and used for predetermined maintenance such as a cleaning process.
[0035]
In the next solid-liquid separation, the frame is again tightened through the hydraulic cylinder to supply the slurry, which is used for solid-liquid separation.
[0036]
In the solid-liquid separation process, the mesh body 9 ′ is not covered with the boss 22 portion, and since the mesh body 9 ′ is penetrated, the mesh body is not crushed by the adjacent bosses 22 adjacent to each other. A drainage passage for the filtrate to the T-shaped drainage pipe 27 through the mesh body is sufficiently secured.
[0037]
The mesh body 9 'made of resin is not limited to a square mesh, but may be formed in a shape that forms a water passage in the radial direction of the filter plate body 8'.
[0038]
Of course, the embodiment of the invention of this application is not limited to the above-described embodiment. For example, a thin filter plate is formed by embedding a metal mesh strip inside the rubber filter plate main body. Various modes such as reinforcing the strength of the main body 8 'can be employed.
[0039]
Of course, an iron plate or the like can be attached to the contact surface of the boss in order to change the design.
[0040]
【The invention's effect】
As described above, according to the invention of this application, in the filter plate structure of the filter press, the filter plate main body is made of rubber having a hardness of 90 °, a spreading ratio of 120%, etc., and is remarkably reduced in weight. A slurry chamber for the slurry to be fed is set by a pipe for supplying the slurry to the slurry chamber being set at the center of the filter plate main body, and a slider for slidably fitting the slurry to the slurry supply pipe. Displacement of the pressure distribution is avoided, and the rubber filter plate main body is not deformed.
[0041]
In addition, a predetermined number of bosses that are in close contact with each other when adjacent filter plate bodies are close to each other on the surface of the filter plate body are provided with a plurality of bosses so that the slurry between the filter plate bodies can be passed through the filter frame by a hydraulic cylinder. Even when the pressing force is increased, the bosses are pressed against each other to prevent deformation and displacement of the filter plate main body, thereby preventing slurry from passing through the filter cloth attached to the surface of the filter plate. There is an effect that the drainage of the filtrate is ensured.
[0042]
Further, a T-shaped drainage pipe is set on the flange on the peripheral edge of the rubber filter plate main body so as to communicate with the drainage port of the filter frame, so that the T-shaped drainage pipe is a kind of centering. It has a positioning function, and also prevents deformation and displacement when the pressing force against the slurry through the hydraulic cylinder is increased, and reliably drains the filtrate from the slurry between adjacent filter plates. There is an effect that is reliably performed.
[0043]
Further, the filter cloth is attached to the filter plate body through a synthetic resin mesh body, so that the filter plate body has a filtrate guide groove and the like as in the conventional mode. There is no reduction in strength or deformation due to a large pressing force, and there is an effect that the filtrate is surely and smoothly drained to the T-shaped pipe through the mesh body.
[0044]
In addition, the mesh body and the filter cloth can be set together with the mesh body and the filter cloth easily by tightening the flange part of the rubber filter plate main body via a bolt to the outer filter frame, There is also an effect that maintenance such as washing and replacement of the mesh body and the filter cloth after opening the frame and dropping the cake is extremely easy.
[0045]
In addition, as described above, the positioning pin is provided on the ring-shaped filter frame to which the set filter plate body is attached, so that the positioning at the initial setting is easy, and the side slip and axial displacement at the time of pressurization are reduced. Thus, an excellent effect is achieved that solid-liquid separation can be performed as designed.
[0046]
In addition, by providing a T-shaped drainage pipe provided at the peripheral edge of the filter plate main body via a ring-shaped spacer on the flange of the rubber filter plate main body, the filter plate main body may be deformed unexpectedly. Even when there is a risk of the occurrence of this, it is possible to maintain the posture in which the T-shaped drainage pipe is accurately faced to the drainage port of the filter frame, and thus the solid-liquid separation action is performed as designed and highly efficient. An excellent effect is achieved.
[0047]
By adopting such a filter plate structure, the filter plate body has a hardness of 90 ° even when applied to a frame clamping pressure slurry of 40 to 100 atm. By using the one with a spreading rate of 120%, etc., the filter plate main body always maintains a stable solid-liquid separation posture and performs the solid-liquid separation action through the crushing action of the surface contact between the bosses of the filter plate. It is possible to reduce the weight of a conventional filter plate made of a casting, and to withstand a high frame clamping pressure and to perform a stable and highly efficient solid-liquid separation effect. .
[Brief description of the drawings]
1A is a partially cut perspective view of a filter plate according to the present invention, FIG. 1B is an enlarged half sectional view of the filter plate, and FIG. 1C is an overall schematic perspective view of a synthetic resin mesh body, (D) is a partially enlarged perspective view of the slurry supply pipe provided at the center, (E) is a cross-sectional view of the enlarged portion of the T-shaped pipe with respect to the peripheral edge of the filter plate body, and (F) is a mesh body and a filter. It is a side view of the state in which the cloths are stacked together.
FIG. 2 is a side view of a general embodiment of a filter press.
FIG. 3 is a longitudinal sectional view of each filter plate of a filter press according to the prior art.
[Explanation of symbols]
1 base
2 Stand
3 Stand
4 Filter plate
5 Guide rail
5 'rail guide
6 Hydraulic cylinder
7 Drainage chute 8 Filter plate body 8 'Filter plate body
9 Filtrate guide groove 9 'Mesh body made of synthetic resin
10 Filtrate outlet 10 'Drain outlet 10 "Drain outlet
11 Filter cloth 11 ' Filter cloth
12 Slurry supply port 12 'Slurry chamber
13 Fluid passage hole 14 Flange around the filter plate body 15 Filter frame
16 notches
17 O - ring 18 bolt
19 Male pin (positioning pin)
20 Mespin (positioning pin)
22 Boss
22 'insertion hole 23 slurry supply pipe
23 'insertion hole
24 Flange
25 slits
26 Slider 27 T-shaped drainage pipe 27 'Ring-shaped spacer
91 Flange

Claims (8)

In a filter plate used in a filter press that supplies slurry to a slurry chamber between a plurality of adjacent filter plates and presses the slurry at a high pressure in a frame tightened state to separate the slurry into a solid and liquid,
A filter plate body formed in a disk shape;
A plurality of bosses integrally projecting on both sides of the filter plate body;
A filter cloth attached to the filter plate main body so as to cover the boss;
A filter frame provided so as to surround the peripheral edge of the filter plate body,
An inlet part is formed in the peripheral part of the filter plate main body to flow the filtrate of the slurry separated into solid and liquid via the filter cloth,
A drainage port for discharging the filtrate from the inlet portion to the outside is formed in the filter frame,
A filter press filter plate, wherein a drainage pipe communicating with a drainage port of the filter frame is disposed inside an inlet portion of the filter plate main body. In濾枠formed a drain port to be divided into short cylindrical peripheral surface, rubber filtration plate main body is disposed which is additionally provided a filter cloth on the surface, the central portion of the filtrate plate body In the filter plate of the filter press in which the slurry supply pipe has a slit communicating with the slurry chamber between the filter plate bodies,
A plurality of bosses are integrally projected on both sides of the filter plate body ,
An inlet portion is formed on the periphery of the filter plate body to allow the filtrate of the slurry separated into solid and liquid to flow through,
Inside the inlet portion of the filter plate body, a T-shaped drainage pipe communicating with the drainage port on the peripheral surface of the filter frame is disposed,
The flange portion of the periphery of the filter plate body is integrally fixed to the filter plate via a bolt,
Filter plate of filter press, characterized in that the positioning pin is fixed to the濾枠. The filter cloth of filter press according to claim 1 or 2, characterized in that it is additionally provided via the synthetic resin mesh member relative to the filtration plate main body filtration plate. 4. The filter plate of the filter press according to claim 3, wherein the mesh body made of synthetic resin is penetrated by the boss and attached to the filter plate main body. The synthetic resin mesh body and filter cloth, through the flange portion of the filtration plate main body, the filter press of claim 3, wherein in that it is fastened to濾枠filtration plate. Filter plate of filter press according to claim 2, characterized in that the positioning pin is composed of the axial male pin and female pin. The filter plate of the filter press according to claim 1 or 2, wherein the drainage pipe is disposed on the lower side of the filter frame . The filter plate of the filter press according to claim 1 or 2, wherein the drainage pipe is disposed via a ring-shaped spacer.

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