JP5321550B2 - Cake peeling device in filter press - Google Patents

Description

  The present invention is intended to form a cake in a filtration chamber between filter plates for a stock solution having good filterability, and to peel cakes on a filter press that peels cakes adhering to a filter cloth at the same time that many filter plates are opened. Relates to the device.

Conventionally, filter presses press the stock solution into the filtration chamber between the filter plates and separate the solid and liquid with a filter cloth. To reduce miscellaneous time, the filter plates are connected with a link chain, and a number of filter plates are connected continuously. The cake is peeled off while opening the plate, enabling large-capacity processing.
For the unfilterable stock solution, the filter cloth is run to peel the cake, and for the stock solution having good filterability, the filter cloth is vibrated to peel the cake.
As an apparatus for vibrating the filter cloth to peel the cake between the filter cloths, for example, the upper end of the filter cloth is fixed to the upper support bar that is swingably disposed on the upper part of the filter board, and the upper part of the parallel filter plates A filter press that peels off the cake by oscillating the filter cloth between the opened filter plates all at once is provided in the vicinity of the lower portion of the support bar with a vibration shaft provided with a lifting device and a vibration device. The applicant of this invention has proposed.

Japanese Patent No. 4164829 (Claim 1, FIGS. 1 to 3)

  The conventional filter press that vibrates the filter cloth with the vibrating shaft peels the cake well from the filter cloth and shortens the miscellaneous time. When the peelability is deteriorated due to clogging or the like, cake force remains on the filter cloth because the force of the vibration device that vibrates the vibration bar is weak. When the filter plate is closed, residue may get caught in the sealing surface of the filter plate and the filter cloth may be damaged. The damaged filter cloth between the filter plates needs to be replaced, and the stock solution is attached to the filter cloth. It takes time to remove and install the plate.

  In order to solve the conventional problems, the present invention provides a cake peeling apparatus in a filter press that continuously opens a large number of parallel filter plates, peels cakes at the same time as the opening plates, and shortens miscellaneous time to increase capacity. provide.

A large number of filter plates are arranged in parallel on the guide rails supported on the front frame and the rear frame, and the filter plates are connected by a link chain to open toward the rear frame side, and a spring is extrapolated along the parallel filter plates. In a filter press in which the upper end of the filter cloth is suspended from a support bar that is erected on a support bar that is swingably supported by a spring, the excitation shaft is disposed along the filter plate. A large number of contact plates are placed on the upper surface , front frame side with an inclined surface and rear frame side with a vertical surface, and are placed near the lower part of the support bar. However, simultaneously with the opening of the filter plate, the support bar hanging down with the weight of the cake adhering to the filter cloth can be sequentially brought into contact with the contact plate to peel the cake from the filter cloth. The support bar suspended by the weight of the cake adhering to the filter cloth without peeling at the same time as the opening plate is intermittently brought into contact with the inclined surface and dropped, and the impact operation is repeated until the cake attached to the filter cloth Residue can be removed. If the contact plate is made larger, the vibration amplitude becomes larger. By increasing the number of contact plates, the number of vibrations can be increased and the peeling function can be enhanced.

If the contact plate placed on the upper surface of the vibration shaft is narrowed in order toward the front frame, the filter cloth on the end side of the open plate suspended from the support bar of the filter plate will contact the contact plate. The number of vibrations in contact can be increased .
In addition, the opening pitch between the filter plates is such that the opening pitch between the front frame and the end filter plate is wider than the open plate pitch between the parallel filter plates. The number of vibrations to be brought into contact with the plate can be increased.

The vibration shaft that is installed on the support bar that suspends the filter cloth is an air cylinder that is installed on the front frame and the rear frame connected to the vibration shaft that is equipped with a vibrator. The support bar that hangs down without causing the cake to peel off from the filter cloth even if it is brought into contact can peel the cake from the filter cloth by vibrating the vibration shaft.
To detect abnormalities in the filter cloth, a projector and a light receiver are installed on the front and rear frames to irradiate the virtual position of the support bar that compresses the spring with the cake attached to the filter cloth. Due to the liquid property of the filter or clogging of the filter cloth, the releasability is deteriorated, and the filter cloth to which the residue is attached can be detected.
When the filter plate is closed, there is no risk of the residue biting into the sealing surface between the filter plates, and the filter cloth replacement time can be detected.

The cake peeling apparatus in the filter press according to the present invention is configured as described above, and an impact plate is placed on the upper surface of the vibration shaft disposed along the filter plate so as to be positioned near the lower portion of the support bar. So
Simply attach the contact plate to the vibration bar, give vibration amplitude to the support bar suspended by the weight of the cake adhering to the filter cloth without peeling, and peel the cake from the filter cloth at the same time as opening the plate. This can shorten miscellaneous time and increase capacity.
For the filter cloth on the front frame side where the number of vibrations is small, the opening pitch on the front frame side is made wider than the opening pitch on the rear frame side, or the contact plate is attached to the front frame side sequentially. If the is narrowed, the number of vibrations can be increased on the filter cloth on the front frame side with a small number of collisions.

In addition, if a vibration device is attached to the excitation shaft on which the contact plate is placed on the top surface, a filter cloth that has increased residue due to seasonal fluctuations, and residue remains even when the support bar is brought into contact with the contact plate, Further vibration can be applied.

By projecting light onto the virtual position of the support bar that compresses the spring, it becomes possible to detect changes in the stock solution due to seasonal fluctuations or clogging of the filter cloth, and the residue on the sealing surface of the closed filter plate There is no fear of biting, and it is possible to detect when to replace the filter cloth.

It is a side view of the filter press using the peeling apparatus of the cake which concerns on this invention. Similarly, it is a front view of the filter plate assembly supported on the guide rail. Similarly, it is a front view of the filter cloth supported on the guide rail. Similarly, it is a principal part side view of the filter board which hangs a filter cloth. Similarly, it is a side view of the vibration shaft arranged along the guide rail. Similarly, it is a conceptual diagram of the contact plate in parallel with the excitation shaft. Similarly, it is a conceptual diagram of the contact plate in parallel with the vibration shaft of another embodiment. Similarly, it is a conceptual diagram when a filter plate arranged in parallel between a front frame and a rear frame of another embodiment is opened. Similarly, it is a conceptual diagram when the parallel filter plates shown in FIG. 8 are closed. Similarly, it is a side view of a filter press provided with a filter cloth abnormality detection device.

The cake peeling apparatus in the filter press according to the present invention will be described in detail with reference to the drawings. First, FIG. 1 is a side view of a filter press, and a pair of guide rails 3 bridged between a front frame 1 and a rear frame 2; 3, a large number of filter plates 4... And a movable head 5 are supported at the rear end. The parallel filter plates 4 and the link chains 6 that open the movable head 5 at predetermined intervals are connected.
A clamping cylinder 7 disposed on the rear frame 2 is connected to the movable head 5 so that the parallel filter plates 4 can be opened and closed at a predetermined interval.

FIG. 2 is a front view of a filter plate assembly to be supported on the guide rail. Filter plate arms 8 and 8 to be supported on the guide rails 3 and 3 are arranged on the shoulders on both sides of the filter plate 4, and the upper center portion. Filtrate discharge ports 10 and 10 are opened at both ends of the stock solution supply path 9 and the lower part, and a concave filtration bed 4 a is formed at the center of the filter plate 4.
A guide shaft 12 is erected on the head metals 11, 11 disposed on both shoulders of the filter plate 4, the springs 13, 13 are extrapolated, and the support bar 14 inserted through the guide shaft 12 is elastically shaken by the spring 13. A plurality of latches 15 are provided on both side surfaces of the support bar 14 so as to be movable.

FIG. 3 is a front view of the filter cloth, and a plurality of cutout holes 17 are formed on the upper edge of the rectangular filter cloth 16 so as to be engaged with the latches 15 of the support bar 14. Is opened, a filter cloth support bar 18 is inserted into the bag portion 16a, and a bag portion 16b having a notch is formed in the lower end portion of the filter cloth 16 to form a weight 19. It is inserted.
A through hole 20 for supplying a stock solution is provided in the upper center portion of the filter cloth 16 so as to contact the stock solution supply path of the filter plate 4.

4 is a side view of an essential part of a filter plate for suspending the filter cloth, and the filter cloth support bar 18 inserted through the bag portion 16a at the upper edge of the filter cloth 16 shown in FIG. 3 is exposed from the notch hole 17, The filter cloth support bar 18 of the notch hole 17 is locked to the latch 15 of the support bar 14 disposed on the upper part of the filter plate 4 shown in FIG. 2, and the filter cloth 16 is attached to the front surface of the filter bed 4 a of the filter plate 4. Hanging. The upper ends of the latches 15... Erected on both upper sides of the support bar 14 are bent, and the filter cloth support bar 18 at the upper edge of the filter cloth 16 by the repulsive force of the compression energy of the spring 13 that is extrapolated to the guide shaft 12. Is removed from the support bar 14.
As shown in FIG. 4, a stock solution supply plate 24 is fixed to one of a pair of filter cloths 16, 16 suspended between the filter plates 4, 4, and the stock solution supply path 9 and the filter fabric formed on the filter plate 4. A stock solution passage 25 of the stock solution supply plate 24 is fitted into the through hole 20 in the upper central portion of the 16, and a supply path 26 for branching from the stock solution passage 25 of the stock solution supply plate 24 to supply the stock solution to the filtration surface of the filter cloth 16. It is provided.

When the parallel filter plates 4 are closed, the undiluted solution supply plate 24 suspended on the filter cloth 16 is sandwiched between the front and rear filter plates 4 and 4 and suspended on the filtration beds 4a and 4a of the filter plate 4. A filtration chamber 27 is formed between the pair of filter cloths 16 and 16. The stock solution passage 25 of the stock solution supply plate 24 is communicated with the stock solution supply path 9 formed in the filter plates 4 and 4, and the stock solution is press-fitted into the filtration chamber 27 from the supply channel 25 of the stock solution supply plate 24, and the filtration of the filter plate 4 is performed. Solid-liquid separation is performed with a filter cloth 16 suspended from the floor 4a.
The support bar 14 for hanging the filter cloth 16 is formed in a rectangular hollow shape, and a washing water hose (not shown) is connected to the support bar 14 to the alternate support bar 14 arranged on the parallel filter plates. In the lower surface of the support bar 14, cleaning nozzles 28 are disposed at the center and at both ends.
When the filter cloth 16 is clogged by continuing the filtration operation, or when residue remains on the surface of the filter cloth 16 after the cake is peeled off, washing water is sprayed from the washing nozzle 28 and the filter bed of the filter plate 4 is filtered. The dirty surface of the filter cloth 16 suspended from 4a is washed.

FIG. 5 is a side view of the vibration shaft disposed along the guide rail 3. A pair of air cylinders 30, 30 hang down from brackets 29, 29 provided on both side walls of the front frame 1 and the rear frame 2. The excitation shaft 31 disposed along the guide rail 3 is connected to the air cylinders 30 and 30 so as to be freely raised and lowered. A large number of contact plates 32 are placed on the upper surface of the vibration shaft 31, and a vibrator 33 is disposed on the side surface of the central portion. The vibration shaft 31 is provided along the shoulder of the filter plate 4 in the vicinity of the lower part of both ends of the support bar 14 on which the filter cloth 16 is suspended.

FIG. 6 is a conceptual diagram of the contact plate arranged in parallel with the vibration shaft. A large number of contact plates 32... Are evenly arranged on the upper surface of the vibration shaft 31 disposed along the shoulder of the filter plate 4. It is mounted in parallel, and an inclined surface 32a is formed on the front frame 1 side and a vertical surface 32b is formed on the rear frame 2 side. The contact plate 32 placed on the upper surface of the vibration shaft 31 is disposed at a virtual position of the support bar 14 that compresses and descends the spring 13 with the weight of cake or residue attached to the filter cloth 16.
When the cakes are generated between the filter plates and the parallel filter plates 4 are continuously opened, the support bar 14 for suspending the filter cloth 16 is the weight of the cake attached to the filter cloth 16 between the filter plates. The spring 13 is elastically compressed and rocked, and the cake is peeled off from the filter cloth 16. The support bar 14, which is lowered by compressing the spring 13 with the weight of cake or residue remaining on the filter cloth 16 without being peeled off, is opened in a large number of positions where the support bar 14 is placed on the vibration shaft 31. After making contact with the inclined surface 32 a of the contact plate 32 intermittently and intermittently, the vertical surface 31 b is dropped, and the filter cloth 16 suspended from the support bar 14 is swung by the repulsive force of the compression energy of the spring 13. The cake and residue adhering to the filter cloth 16 are peeled off by repeating the above. With a simple structure that simply attaches the contact plate 32 to the vibration shaft 31, cakes and residues adhering to the filter cloth 16 are peeled off simultaneously with the opening of a large number of filter plates 4. You can improve your ability.

Even if the support bar 14 on which the filter cloth 16 is suspended is sequentially brought into contact with the contact plate 32 of the vibration shaft 31 even if the liquidity of the undiluted solution due to seasonal fluctuations or clogging of the filter cloth is deteriorated, the cake When the residue remains on the filter cloth 16, the vibration shaft 31 disposed along the guide rail 3 is vibrated by the vibrator 33 while being lifted and lowered by the air cylinders 30, 30 to suspend the filter cloth 16 on which the cake remains adhered. The support bar 14 to be installed is vibrated to remove the residue from the filter cloth 16.
In addition, when the parallel filter plates are opened, the support bar 14 for hanging the filter cloth 16 on which the cake adheres and remains is applied to the contact plate 32 while applying a slight vibration to the excitation shaft 31 with the vibrator 33. The plate may be opened by impact, and a synergistic effect of impact and vibration is obtained. In addition, the vibration shaft 31 can be lowered by the air cylinders 30 and 30 when replacing the filter cloth, so that the filter cloth can be easily replaced.

FIG. 7 is a conceptual diagram of a contact plate arranged in parallel with the vibration shaft of another embodiment. The mounting pitches α, β, γ of the contact plates 32 parallel to the upper surface of the vibration shaft 31 are as follows. The pitch is narrowed sequentially toward the front frame 1 side.
In the embodiment of the present invention, the mounting pitch α: β: γ = (3-10) :( 2-5): 1 of the contact plates 32. It is possible to increase the number of times of vibration that the end side filter plates 4... Sequentially opening toward the front frame 1 make contact with the contact plate 32.
1 has a smaller opening movement distance on the front frame 1 side than on the rear frame 2 side, and therefore the support bar 14 for suspending the filter cloth 16 on the front frame 1 side is shown. Reduces the number of times of contact of the parallel contact plates 32. By narrowing the mounting pitch γ of the contact plates 32 on the front frame 1 side, the number of times of contact can be increased and the filter cloth 16 can be vibrated.
And if the contact plate 32 mounted on the upper surface of the vibration shaft 31 is enlarged, the vibration amplitude of the filter cloth 16 to which cake or residue adheres increases.
Further, if the number of the contact plates 32 placed on the upper surface of the vibration shaft 31 is increased, the number of vibrations of the filter cloth 16 to which cake or residue adheres increases, and the peeling function is enhanced.

8 and 9 are conceptual diagrams when the filter plate arranged in parallel between the front frame and the rear frame of another embodiment is opened and when the filter plate is closed, The open plate pitch is obtained by making the open plate pitch H of the front frame 1 and the terminal filter plate 4 a wider than the open plate pitch h between the parallel filter plates 4... In the embodiment of the present invention. The open plate pitch H of 1 and the terminal filter plate 4a is 2 to 6 times the open plate pitch h between the parallel filter plates 4.
Since the filter cloth 16 suspended from the support bar 14 on the open plate end side has a small number of vibrations, by making the open plate pitch H between the front frame 1 and the end filter plate 4a wider than the open plate pitch h between the filter plates 4 and 4, The number of times that the support bar 14... Suspending the filter cloths 16.

FIG. 10 shows a filter cloth abnormality detection device, in which a projector 35 and a light receiver 36 are arranged on brackets 37 and 38 erected on the front frame 1 and the rear frame 2. The position of the projection beam θ irradiated by the projector 35 irradiates the position of the support bar 14 that compresses the spring 13 with the weight of cake or residue attached to the filter cloth 16.
Only when the support bar 14 is blocking the light projection θ, the vibrator 32 is operated while raising the air cylinders 30 and 30 shown in FIG. 5, and the vibration shaft 31 is vibrated to adhere to the filter cloth 16. Can be removed. It is also possible to regenerate the filter cloth 16 without using the washing water of the washing nozzle 28.
When the projection light θ is irradiated, when the filter plates 4 are closed, there is no fear that the residue bites into the sealing surface between the filter plates 4 and 4, and the replacement time of the filter cloth 16 can be detected.

The cake peeling device in the filter press according to the present invention is provided with a vibration shaft on which a large number of contact plates are placed in the vicinity of a lower portion of a support bar for suspending a filter cloth, and the parallel filter plates are continuously arranged. While opening the plate, the cake sticking to the filter cloth and the support bar hanging down with the weight of the residue are sequentially brought into contact with the contact plate to peel the cake from the filter cloth, reducing the miscellaneous time and improving the capacity. it can.
Therefore, it is suitable as a filter press used for production processes and industrial wastewater containing a large amount of inorganic substances, and can also be used for long-time filtration of undiluted liquids such as water and industrial sludge and chemical plants.

DESCRIPTION OF SYMBOLS 1 Front frame 2 Rear frame 3 Guide rail 4 Filter board 6 Link chain 12 Guide shaft 13 Spring 14 Support bar 16 Filter cloth 30 Air cylinder 31 Exciting shaft 32 Contacting plate 32a Inclined surface 32b Vertical surface 33 Vibrator 35 Light projector 36 Light receiver α, β, γ Mounting pitch θ Projection beam H, h Open plate pitch

Claims (5)

A large number of filter plates (4 ...) are arranged in parallel on the guide rail (3) supported on the front frame (1) and the rear frame (2), and the filter plates (4, 4) are connected by a link chain (6). The guide shaft (12) with the spring (13) extrapolated on the shoulder of the filter plate (4) is erected to open toward the rear frame (2) , so that the spring (13) can swing freely. In the filter press in which the upper end of the filter cloth (16) is suspended from the supported support bar (14),
An excitation shaft (31) is disposed along the parallel filter plates (4...) , And an inclined surface (32a) and a rear frame (on the front frame (1) side are formed on the upper surface of the excitation shaft (31). 2) A cake press in a filter press characterized in that a large number of contact plates (32...) Having a vertical surface (32b) formed on the side are placed in the vicinity of the lower portion of the support bar (14). Peeling device. 2. The cake peeling apparatus in a filter press according to claim 1 , wherein the contact plate (32) has a mounting pitch (α, β, γ) that is gradually narrowed toward the front frame (1). Said front frame (1) and Kaihan pitch end filter plate (H) is claimed in claim 1 or claim 2, characterized in that it has wider than Kaihan pitch of multiple parallel braze plates (h · · ·) Cake stripping device in a filter press. Claims 1 to, characterized in that the concatenation of the vibrator (33) vibrating shaft and attached (31) to the air cylinder (30, 30) which is disposed in the rear frame (2) and the front frame (1) The cake peeling apparatus in the filter press of any one of claim | item 3 . A projector (35) and a light receiver (36) are arranged on the front frame (1) and the rear frame (2), and the support bar (14) compresses the spring (13) with the cake adhered to the filter cloth (16). The cake peeling apparatus for a filter press according to any one of claims 1 to 4 , wherein the projection position (θ) is irradiated to the virtual position.