JPS6238007B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a squeezing type filter press for dehydrating a stock solution by squeezing it.

Prior Art and its Problems In general, when squeezing a stock solution in a squeezing type filter press, the overefficiency and throughput greatly differ depending on the magnitude of the squeezing pressure, or whether it is balanced or unbalanced. On the other hand, in a filter press that is made up of alternating pressing plates and ordinary plates formed by a rigid frame-shaped main body and a flexible material that expands with compressed air, the flexible material is An abnormal bulge will occur in the vicinity and cause damage, or
Alternatively, there is a problem that the next supply of the stock solution becomes unsmooth. For this reason, for example, a reinforcing ring is fitted into the stock solution hole of the flexible member to prevent the flexible member from bulging toward the stock solution hole. However, in this case, the flexible material suddenly bends and bulges from the edge of the reinforcing ring, resulting in the inconvenience of being easily damaged from the portion located at the tightening edge of the reinforcing ring. are doing. In order to improve this inconvenience, for example, as seen in Japanese Patent Publication No. 58-35727, an auxiliary ring is provided in the stock solution hole of the opposed plain plate, and the outer periphery of the auxiliary ring allows the flexible material to be Devices have been provided that are designed to suppress excessive bulge. However, in such a device, although it is possible to limit the rapid curved expansion of the flexible material, the phenomenon that the flexible material bulges out in a spindle shape from the outer periphery of the reinforcing ring is unavoidable, and it is still insufficient in terms of durability. It is not completely satisfactory, and there are some difficulties in balancing the squeezing pressure with respect to the raw solution.Furthermore, the edge of the reinforcing ring protrudes outward from the cloth surface, so some parts of the cake after squeezing are not completely satisfied. Even if the cloth is vibrated to remove the cake deposited on the boundary step between the reinforcing ring and the cloth and adhered to the cloth surface of each plate, the vibration is difficult to be transmitted to the boundary between the reinforcing ring and the cloth. It has the following drawbacks.

Purpose of the Invention The present invention was made with the aim of improving the above-mentioned difficulties and drawbacks of the conventional compression type filter press, and it prevents excessive expansion of the cloth and flexible plate on the pressing plate side and When pressure is applied, the flexible plate and the cloth can bulge substantially parallel to the surface of the pressing plate, and there is no cake buildup at the boundary step between the reinforcing ring and the flexible plate. Furthermore, the present invention provides a squeezing type filter press that can uniformly apply vibrations to remove the cake over the entire surface of the cloth.

Composition of the Invention The compressing type filter press according to the present invention includes a compressing plate in which a flexible plate having a circumferential surface with a thickness smaller than that of the frame is provided on the inner side of a rigid frame-like frame; In a compression type filter press, which is made up of alternating plates with regular plates having oversurfaces that are thinner than the frame parts, a hole is provided on the side of the stock solution hole on either the press plate or the regular plate. A plurality of raised parts protruding in the thickness direction of the plate are formed in a radial arrangement, and both sides from the inner periphery of the pressing plate and the ordinary plate are covered with cloth, and the side surface of the other plate around the stock solution hole is covered with cloth. are arranged close to each other at the raised portion.

Embodiments The following Figures 1 and 2 show embodiments of the present invention.
To explain the figure in detail, it is equipped with a rectangular or circular frame-like frame 1 made of metal or hard plastic, and on the inside part of the frame 1,
A pressing plate 4 is provided with a flexible plate 3 made of a rubber material and having an oversurface 2 with a thickness smaller than that of the frame 1; In a compression type filter press, a large number of ordinary plates 7 having thin oversurfaces 6 are arranged alternately, and on the side surface of the ordinary plate 7 on the side of the stock solution hole 8, there are holes radially extending from the center of the stock solution hole 8. In this arrangement, a plurality of raised portions 9, 9 protruding in the thickness direction of the plate 7 are formed so that the top flat surfaces 10, 10 are close to the side surfaces around the stock solution holes 8 of the adjacent pressing plates 4. Comb, each raised part 9,9
While forming stock solution entrance grooves 11, 11 between them,
The pressing plate 4 and the ordinary plate 7 are constructed so that the entire surface from the inner peripheral surface to both side surfaces thereof is covered with cloths 12, 12.
In the figure, 12' and 12' are joints along the inner circumference of the solution hole in the cloth.

In this embodiment, the above-mentioned pressing plate 4 is constructed by covering the surface of a rigid core plate 13 with a flexible plate 3 made of a rubber material. The thin walled portion of the surface bulges outward to exert a squeezing action on the stock solution within the chamber 15. The inner periphery 16 of the stock solution hole 8 of the flexible plate 3 is thickened and has a U-shaped cross section, and is fitted tightly into the inner periphery of the core plate 13 and reinforced with an arcuate cross section on the inner periphery. Although the ring 17 is shown fitted, the structure of the pressing plate 4 is not particularly limited. In the figure, reference numeral 18 denotes an overwater discharge port communicating with overwater guide grooves (not shown) formed on the upper surfaces 2 and 6 of the plates 4 and 7.

Figure 3 shows the raised portions 9, 9 of the above-mentioned ordinary plate 7.
The figure shows an embodiment in which the plate 7 is formed separately and fixed to the plate 7 with set screws 19, 19. According to this configuration, the raised portions 9, 9 having different heights and sizes
By preparing this, you can create a filter press that is suitable for the quality and concentration of the stock solution.
Further, if the raised portions 9, 9 are removed, the board can be used as a normal board.

In the embodiment described above, the raised portions 9, 9 are provided on the ordinary plate 7, but the raised portions 9, 9 may be provided on the pressing plate 4. FIG. 5 shows this aspect. That is, raised portions 9, 9 are formed at intervals on the thick wall portion of the inner circumferential portion 16 of the flexible plate 3 that constitutes the surface of the above-mentioned pressing plate 4,
The entire surfaces of both plates 4, 7 are covered with cloths 12, 12, and the top flat surfaces 20, 20 of the raised portions 9, 9 are covered with cloths 12, 12.
is in close proximity to the side surface surrounding the stock solution hole of the adjacent ordinary plate 7.

The shapes of the raised portions 9, 9 provided on the sides around the stock solution holes of the ordinary plate 7 or the pressing plate 4 do not need to be specified; Preferably, the raised portions 9, 9 are shaped like a trapezoid with four equally spaced
~ When six pieces are provided, the flat surfaces 2 of the raised portions 9, 9 located on the lower half circumference side of the plate as shown in FIG.
By making the size of 0 and 20 slightly smaller,
This is convenient for discharging the cake.

Effects of the Invention As described above, the pressing type filter press according to the present invention is equipped with a flexible plate 3 having a rigid frame-like frame 1 and a flexible plate 3 formed with an oversurface 2 having a thickness smaller than that of the frame 1 on the inner side of the frame 1. In a compression type filter press in which plates 4 and ordinary plates 7 having an oversurface 6 having a thickness smaller than the outer frame portion 5 are arranged alternately, either one of the compression plates 4 or the ordinary plates 7 is arranged. A plurality of raised portions 9, 9 protruding in the thickness direction of the plate are formed in a radial arrangement of the stock solution hole 8 on the side surface around the stock solution hole 8, and the stock solution hole of the compression plate 4 and the normal plate 7 is The entire surface from the inner periphery to both sides is covered with cloths 12, 12, and the sides around the stock solution hole 8 of both plates are brought close to each other at the raised parts 9, 9, so that no pressure is applied to the pressing plate 4. When fluid is supplied, the flexible plate 3 has raised portions 9, 9 around its stock solution hole 8, as shown by the dashed line in FIG.
The expansion is suppressed by the presence of the chamber 15, so that it expands substantially parallel to the surface, compressing the stock solution in the chamber 15 almost evenly toward the normal plate 7 side, and performing an effective dehydration action. be able to. Furthermore, the cloth 12 is covered from the inner peripheral surface of the stock solution hole to the entire surface of the plate in the pressing plate 4 and the ordinary plate 7, and is not fastened and fixed by the edge of a ring as in the conventional case, so that the cloth 12 is covered locally. The life of the cloth 12 can be greatly extended without any excessive tension being applied. Further, the vibration applied to the cloth 11 when peeling off the remaining cake after dehydration spreads to the entire cloth, and the matter adhering to the cloth surface can be efficiently removed.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention, and FIGS. 1 and 2 are a partially omitted cross-sectional view showing an embodiment in which a raised portion is provided on a normal plate, and a portion of the stock solution hole portion.
3 and 4 are partially cutaway sectional views and partially cutaway front views showing other embodiments,
FIGS. 5 and 6 are a partially omitted cross-sectional view and a partially cutaway front view showing an aspect in which the pressing plate is provided with a raised portion. 1... Frame body, 2... Over surface, 3... Flexible plate, 4... Press plate, 5... Frame part, 6... Over surface, 7... Ordinary board,
8... Solution hole, 9... Raised portion, 12... Cloth.

Claims (1)

[Claims] 1. A pressing board with a flexible plate formed inside a rigid frame-like frame with an oversurface that is thinner than the frame, and a normal press with an oversurface that is thinner than the outer frame part. In a compression type filter press consisting of alternating plates, a plurality of holes protruding in the thickness direction of the plate are arranged radially on the side surface of the liquid solution hole of either the press plate or the ordinary plate. A raised part was formed, and the entire surface of both side surfaces from the inner periphery of the stock solution hole of the pressing plate and the ordinary board was covered with cloth, and the side surface around the stock solution hole of the other plate was made to be close to the raised part. A compression type filter press characterized by: