JPS5855924Y2 - filter press - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a filter press that separates a stock solution into a filtrate and a filter residue by filtration or compressive filtration, and particularly relates to a filter residue peeling device for a filter cloth used for each filter plate or compressed filter plate.

Conventionally, in filter cloth traveling type filter presses, in order to filter the stock solution and collect the filter residue adhering to the filter cloth when the frame of the filter press is opened, a winding roller that winds the filter cloth or a winding roller is used. It is known that a filter sludge removing member such as a scraper is brought into contact with the surface of a filter cloth that is curved along the surface of a guide roller that guides the filter cloth to scrape off the filter sludge from the filter cloth. .

However, when scraping the filter sludge from the filter cloth with a scraper or the like as described above, the scraper runs between the filter sludge attached to the filter cloth and the filter cloth, causing the filter sludge to peel off without scraping the surface of the filter cloth. However, the filter cloth surface was easily damaged by the scraper, which shortened the life of the filter cloth.

The present invention has been made in view of the above problem, and consists of a pair of support frames that support a filter sludge stripping member formed of a pair of plate-shaped members between which a slit passage through which a filter cloth passes is supported below a filter plate. A wedge-shaped edge portion is provided between the filter cloth and at the upper edge of one of the plate-like members that slides in contact with the surface side of the filter cloth, so that the filter residue can be smoothly peeled off from the filter cloth without damaging the surface of the filter cloth. The purpose is to provide a filter press that can.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

In the filter press shown in FIG. 1, 1 is a front stand supporting a main plate 2, 3 is a rear stand, 4.4 is a front stand,
5. Side beams passed between both sides of rear stands 1 and 3, respectively; ......, 5 are interconnected links 6.6
A pair of handles 5a, 5a connected to each other and provided on both sides
7 is a movable plate that is driven back and forth by a drive piston 8 supported on the rear stand 3. When the movable plate 7 is moved backward to the retreat position A shown by the imaginary line in the figure, each filter plate 5 can be opened at the same time at a predetermined interval determined by the connecting link 6.6. ing.

On the other hand, reference numerals 9 and 9 denote a pair of drive shafts having a polygonal cross section on the left and right, bearing between the upper sides of the front and rear stands 1 and 3, respectively, and as shown in FIG. A pair of left and right take-up pulleys 11° 11 are rotatably supported on both sides above the filter plate 5 by support members 10. By forward and reverse driving of the captured motor 13 with a reduction gear, the pair of left and right drive shafts 9, 9 can be driven forward and reverse via a bevel gear transmission mechanism 14.

A suspension string 15 with one end latched to each take-up pulley 11 is wound around the winding pulleys 11, 11 on the right side of the window, and the other end is the end of a filter cloth hanging rod 17 that suspends and supports a filter cloth 16. It is fastened to a connecting fitting 18 attached to the section.

A pair of left and right support fittings 19.19 projecting downward are provided on the lower surface of the filter frame of the filter plate 5, and the support fittings 19.
Further below 19, a filter cloth take-up roller 20 is attached by an auxiliary support fitting 22.

As shown in FIGS. 1 and 3, the winding roller 20 has front and rear filter surfaces 5b, 5b provided on both sides of the filter plate 5.
The end portions of the two filter cloths 16-1 and 16-2, respectively, which cover the filter cloths 16-1 and 16-2, respectively, are latched and fixed to the take-up roller 20.

As shown in FIG. 4, the take-up roller 20 is a cylindrical hollow roller whose both ends are rotatably supported by a support shaft 25 that is non-rotatably fixed between support fittings 19 and 19. Inside this winding roller 20, there are winding rollers 2 at both ends.
A coil-shaped torsion spring 26 that is locked at zero is wound around the spindle 25, and the center portion is hooked to the spindle 25, and the spring force of this torsion spring 26 always allows the winding to take place. The roller 20 is biased in the direction of rotation in which the filter cloth 16-1, 16-2 is wound up.

Further, above the pair of support fittings 19 and 19, a filter residue peeling member 23 consisting of a pair of plate-like members, that is, an outer plate 23 a and an inner plate 23 b is attached.

The inner plate 23b has an upper portion bent toward the outside of the filter plate 5, and both ends thereof are fixed to the support fittings 19, 19.

On the other hand, as shown in FIG. 5, the outer plate 23a has a wedge-shaped edge portion 23C formed on its upper edge, is longer than the width of the filter cloth 16, and has a slit approximately the same thickness as the filter cloth 16. 31.
31, and a bent slit passage 32 is formed between the inner plate 23b and the filter cloth 16 through which the filter cloth 16 passes.

Therefore, when each filter cloth 16 travels downward, the edge portion 23C of the outer plate 23a of the filter residue peeling member 23 is separated from the filter cloth 16 with respect to the filter cloth 16 to which the filter residue 30 has adhered.
It gets stuck between the filter residue 30 attached to the edge part 23.
Since the filter residue 30 is not peeled off from the filter cloth 16 due to the wedge effect of C, the filter cloth 16 is passed through the slit passage 32 while each surface of the filter cloth 16 is in sliding contact with each plate, and the travel path of the filter cloth 16 is directed inward. I am trying to change it to .

Further, a support fitting 19 below the filter residue peeling member 23.
A latch rod 21 is fixed to the front side of the filter plate between 19, and a cleaning pipe 27 is provided below the latch rod 21.

The cleaning tube 27 has a first tube protruding vertically upward on its surface.
Nozzle 23 a and a second nozzle 28 that protrudes diagonally rearward and upward.
b is provided to remove the filter cloth 16 on the rear side of the filter plate from which the filter residue 30 has been peeled off after passing through the slit passage 32 of the filter residue peeling member 23.
-2 is further changed in its running route to the front side of the filter plate 5, and the surface of the filter cloth is washed with washing water sprayed from the first nozzle 28a.

On the other hand, the second nozzle 28b is designed to clean the surface of the filter cloth 16-1 on the front side of the filter plate 5 located at the rear.

In addition, 29 is a water removal plate, and the water that washed the filter cloth 16 is taken up by a filter cloth take-up roller 20, which will be described later.
I am trying to prevent it from happening.

Now, as shown by the solid line in FIG. 1, as the movable plate 7 moves forward,
Filter plate 5. . . . When all the filter plates 5 are fastened to the front stand 1 side, the stock solution supply port 5C of each filter plate 5 is connected from the stock solution supply pipe 1a supported on the stand 1 (see Fig. 2).
The stock solution press-fitted between the filter cloths 16 and 16 via the stock solution supply fittings 16 a attached to each filter cloth 16 is separated into filter residue and filtrate, and the separated filtrate is collected from the filtrate collection pipe 24 . Perform filtration.

When one filtration process is completed and the movable plate 7 is retreated to position A in FIG.
As shown in FIG. 2, the filter plates 5 connected in order from the sides are opened all at once while maintaining a constant interval from each other.

At the same time as the frame is opened, a portion of the separated filter residue falls down due to gravity in the form of a cake.

At the stage where some of the filter residue has fallen, the filter cloth 16 is stretched slightly away from the filter plate 5, and at this stage, the motor 13 is decelerated and driven in the unwinding direction to left and right. When the suspension string 15 wound around the take-up pulley 11.11 is unwound by the drive shafts 9, 9, the torsion spring 26 in the maximum torsion state
rotates the winding roller 20 in the winding direction with a strong spring force.

Due to the winding rotation of the winding roller 20 due to this spring force,
The filter cloths 16-1 and 16-2 on both sides of each filter plate 5 are removed by passing through each filter residue peeling member 23.
-2, the remaining filter residue 30 is peeled off from the filter cloth 16-1, 16-2.

The filter cloth 16-1 on the front side of the filter plate from which the filter residue 30 has been peeled off is wound up by the take-up roller 20 while its travel path is slightly changed inward by the water removal plate 29.

On the other hand, the filter cloth 16-2 on the rear side of the filter plate from which the filter sludge 30 has been peeled off is changed its travel path to the front side by the latch rod 21, and then is wound up by the winding roller 20 together with the filter cloth 16-1. .

Note that each filter cloth 16 is cleaned by the cleaning tube 27 as appropriate when winding up or unwinding the filter cloth.

As described in detail in the above embodiments, the filter press according to the present invention includes a filter sludge stripping member made of a pair of plate-like members forming a slit passage therebetween for allowing the filter cloth to pass through and changing its travel path inward. A wedge-shaped edge portion is provided between a pair of support frames supported below the filter plate, and a wedge-shaped edge portion is formed on the upper edge of one of the plate members that slides into contact with the surface side of the filter cloth, so that when the filter cloth moves downward, a wedge-shaped edge portion is formed. , Only the filter cloth is passed through the slit passage of the filter sludge peeling member, and the filter sludge adhering to the filter cloth can be smoothly peeled off by the edge at the entrance of the slit passage, and when peeling the filter sludge from the filter cloth. In addition, damage to the filter cloth can be reliably prevented.

Further, since the filter cloth can be guided through the slit passage, a filter cloth guide roller is not required, and the structure below the filter plate can be made simpler.

[Brief explanation of the drawing]

Fig. 1 is a front view schematically showing the filter press according to the present invention, Fig. 2 is a rear view of the filter plate in the direction of line I-■ in Fig. 3, and Fig. 3 shows the filter press in an open state. 4 is an enlarged rear view of the main part of FIG. 2, and FIG. 5 is an enlarged front view of the main part of FIG. 3. 1.3...Front, rear stands, 5...
Filter plate, 9...drive shaft, 11...take-up pulley, 15...hanging string, 16...filter cloth,
20... Winding roller, 23... Filter residue peeling member, 23 a... Outer plate, 23 b...
...Inner plate, 30...Filter residue, 32...Slit passage.

Claims (1)

[Scope of utility model registration request] A string-like body connected to the upper end of a pair of filter cloths arranged between adjacent filter plates is wound around a winding means that is driven in forward and reverse directions, so that the pair of filter cloths can be freely taken in and taken out, and each Between a pair of support frames supported below the filter plate, a filter cloth take-up roller is wound around the lower ends of a pair of front and rear filter cloths arranged so as to sandwich the filter plate between the front and rear of the filter plate; A coil spring is mounted in the filter cloth take-up roller to bias the filter cloth take-up roller in the direction of winding up the filter cloth, while directing the travel path of the filter cloth inward over a length at least equal to the width of the filter cloth. A filter sludge peeling member consisting of a pair of plate-shaped members forming a slit passage having a slit width approximately equal to the thickness of the filter cloth is attached between the pair of support frames, and a plate-shaped member that slides into contact with the surface side of the filter cloth. A filter press characterized in that a wedge-shaped edge portion is formed on the upper edge of the member.