JPH0225650B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a cake removal device for a filter press.

BACKGROUND ART Conventionally, in this type of device, a pair of filter cloth tensioning members made of non-stretchable tapes or strings are attached to both sides of the stock solution introduction hole of each filter cloth of a filter press, and these filter cloth tensioning members They are located at each center between both side edges of the cloth and the stock solution introduction hole, are arranged in a substantially inverted C shape when viewed from the front, and have a length extending from the upper end to the lower end of the filter cloth. After the squeeze filtration is completed, when the adjacent filter plates are separated from each other, the filter cloths facing each other are pulled out to the middle of the filter plates together with a pair of filter cloth tensioning members, and each filter cloth is A cake removing device that is tilted from the upper end to the lower end is already known (Japanese Patent Publication No. 1983-1999).
(Refer to Publication No. 49892) However, with this conventional device, the vibrations generated by the vibrator are difficult to be transmitted to the left and right edges of the filter cloth, and therefore, the vibrations remain attached along the inside of the tightening surface of both edges of the filter cloth. The problem was that the cake was very difficult to peel off.

Purpose of the Invention This invention solves the above problem, and when adjacent filter plates are separated from each other after the completion of squeeze filtration,
To provide a cake removing device for a filter press that can extremely quickly and reliably drop cakes from mutually opposing filter cloths, and prevents a portion of the cake from remaining on the left and right edges of the filter cloth. I'm trying.

Structure of the Invention In order to solve the above-mentioned problems, the present invention includes a filter cloth hanging rod attached to each upper edge of a pair of filter cloths that cover both the front and rear filtration surfaces of a filter plate. Both left and right ends of the filter plate are suspended by springs suspended from the spring hanging rods at the upper ends of the left and right sides of the filter plate, and the filter cloth hanging rods of adjacent filter plates facing each other are each hung by a predetermined length. In a filter press connected by a connecting member,
Side filter cloth upholstery members that can be bent by the elasticity of the material are attached to the left and right edges of each filter cloth, and the upper ends of these side filter cloth upholstery members are connected to filter cloth hanging rods. This article focuses on the cake removal equipment that is used in the industry.

Embodiments Next, embodiments of the present invention will be described based on the drawings.

In the drawing, reference numeral 1 denotes a filter plate, which is composed of a substrate and an elastic body such as a rubber plate having filtrate flow grooves on the surface covered on both sides of the substrate, and a stock solution introduction hole 2 in the center. is open. Reference numeral 3 designates a pair of filter cloths that cover both the front and rear filter surfaces of the filter plate 1. At the portion of the stock solution introduction hole 2 of the filter plate 1, the filter cloth 3 is placed along the inner circumferential wall of the stock solution introduction hole 2. At that portion, the filter cloths 3 on both sides of the filter plate 1 are interconnected and supported by the filter plate 1. Reference numeral 4 denotes a filter cloth hanging rod attached to the upper edge of each filter cloth 3, and both left and right ends of these rods are U-shaped spring hanging rods provided in an upright manner at the upper ends of the left and right sides of the filter plate 1. They are each suspended by a spring 5 suspended from the upper horizontal portion 6a of the hanging rod 6. Reference numeral 7 denotes a mounting plate for attaching these spring hanging rods 6 to the filter plate 1, and 8 denotes a connecting member consisting of a chain that interconnects both ends of the mutually opposing filter cloth hanging rods 4 of adjacent filter plates 1. This has a length shorter than the distance between adjacent filter plates 1 when they are spaced apart from each other. Incidentally, this connecting member 8 may be constituted by, for example, a rope or the like other than a chain.

Reference numeral 9 denotes side filter cloth covering members attached to both left and right edges of each filter cloth 3, and these are made of synthetic resin such as FRP (glass fiber reinforced plastic), which can be bent due to the elasticity of the material. Or a thin strip made of metal such as piano wire,
It is made of a rod, a wire, a thin tube, or the like, and has a length extending from the upper end to the lower end of the filter cloth 3. Reference numeral 10 denotes a lower filter cloth tensioning rod attached to the lower end of each filter cloth 3, which is used to stably tension the filter cloth 3 by its weight.

The upper and lower ends of the side filter cloth tensioning members 9 on the left and right edges of the filter cloth 3 are respectively connected to the filter cloth hanging rod 4 and the lower filter cloth tensioning rod 10 by fasteners 11 such as bolts and nuts. ing. In addition, these filter cloth hanging rods 4, side filter cloth tensioning members 9, and lower filter cloth tensioning rods 10 are formed into bag-like portions 3a in which the four edges of the filter cloth 3 are folded back and sewn. They are attached to the filter cloth 3 by being inserted through them.

A pair of arms 12 are attached to the left and right walls of the filter plate 1, and are supported by the left and right side plates 13. Reference numeral 14 denotes filtrate discharge holes provided on both sides of the lower end of the filter plate 1.

In the filter press described above, when the adjacent filter plates 1 are separated from each other after the completion of compression filtration, since the length of the connecting member 8 is shorter than the gap between the two filter plates 1, the filters facing each other are separated from each other. The upper ends of the cloth 3 are both pulled inward. Since the filter cloth 3 is supported by the filter plate 1 at the peripheral edge of the stock solution introduction hole 2, the portion of the filter cloth 3 from the stock solution introduction hole 2 to the upper end is generally inclined, but other filter cloths 3 The part does not slope. However, in this invention, side filter cloth covering members 9 are attached to the left and right edges of the filter cloth 3.
are attached, so that as the filter plates 1 are separated, the left and right edges of the filter cloth 3 are stretched by the side filter cloth tension members 9 and overhang between the filter plates 1, as shown in FIG. This ensures that the portions of the filter cloth 3 near the left and right edges are inclined. In this state, when the hammer 16 of the vibrating device 15 is struck from above against the pair of filter cloth hanging rods 4 to vibrate the filter cloth 3, the side filter cloth covering member 9 is moved as shown by the two-dot chain line in the same figure. It curves outward due to the elasticity of the material. By repeating this vibration, for example, 2 to 5 times, the side filter cloth covering member 9 repeats a reciprocating motion of curving and stretching, and thereby the vibration is effective on both left and right edges of the filter cloth 3 and the entire area around it. The cake is peeled off very quickly and reliably. In particular, since the lower half of the filter cloth 3 near the left and right edges is tilted downward during vibration due to the action of the side filter cloth covering members 9, the cake in this portion is peeled off by its own weight. It becomes easier to fall.

In the above embodiment, the upper and lower ends of the side filter cloth covering member 9 are respectively connected to the filter cloth hanging rod 4 and the lower filter cloth covering rod 10, but the side filter cloth covering member 9 is , it is sufficient that at least the upper end portion thereof is connected to the filter cloth hanging rod 4, and the connecting means is not limited to that shown in the drawings, but may be arbitrary. The means for attaching the side filter cloth covering members 9 to the left and right edges of the filter cloth 3 are not limited to those shown, and other appropriate means may be used.

Effects of the Invention As described above, in the filter press cake removing device according to the present invention, the side filter cloth covering members 9, which can be bent by the elasticity of the material, are attached to the left and right edges of each filter cloth 3, respectively. Since the upper ends of these side filter cloth covering members 9 are connected to the filter cloth hanging rod 4, after the press filtration is completed, as the filter plate 1 is separated, the left and right edges of the filter cloth 3 are is stretched out between the filter plates 1 and tilted by being pulled by the side filter cloth tensioning members 9, thereby causing the lower half of the filter cloth 3 near the left and right edges to also tilt. In this state, when the filter cloth 3 is vibrated by the action of the vibrating device 15, the side filter cloth covering member 9 is bent outward due to the elasticity of the material. By repeating this vibration action, the side filter cloth covering member 9 repeats the reciprocating motion of curving and stretching, thereby effectively transmitting the vibration to the left and right edges of the filter cloth 3 and the entire area around it. The cake flakes off very quickly and reliably. In particular, since the lower half of the filter cloth 3 near the left and right edges is tilted downward during vibration due to the action of the side filter cloth covering members 9, the cake in this portion is peeled off by its own weight. This makes it easier to remove the cake, further increases the cake removal effect, and has the effect that no part of the cake remains attached to the left and right edges of the filter cloth 3.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of a filter plate of a filter press, and FIG. 2 is a side view taken along the line - in FIG. 1, showing a state in which the filter plates are separated. There is. 1... Filter plate, 2... Stock solution introduction hole, 3... Filter cloth,
4... Filter cloth hanging rod, 5... Spring, 6... Spring hanging rod, 8... Connecting member, 9... Side filter cloth covering member, 10... Lower filter cloth covering rod.

Claims (1)

[Claims] 1 A filter cloth hanging rod 4 is attached to each upper edge of a pair of filter cloths 3 that cover both the front and rear filter surfaces of the filter plate 1, and the left and right ends of each filter cloth hanging rod 4 are connected to the left and right sides of the filter plate 1. It is suspended by springs 5 suspended from spring hanging rods 6 at the upper ends of both sides, and the filter cloth hanging rods 4 of adjacent filter plates 1 facing each other are connected to connecting members 8 of a predetermined length. In the filter presses connected together, side filter cloth covering members 9 that can be bent due to the elasticity of the material are attached to the left and right edges of each filter cloth 3, and these side filter cloth covering members 9 are A cake removing device whose upper end is connected to a filter cloth hanging rod 4.