JPH0334962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement of a filter press having a large number of filter plates that can be opened and closed.

(Prior Art) In a filter press in which a filter cloth is stretched between a large number of filter plates, a filtrate is poured into a filter chamber formed between the filter cloths, and the filtrate is pressurized to perform filtration. An important issue is how to eliminate the dehydrated cake left between the filter cloths after dewatering. Therefore, the inventor of the present invention
As shown in Publication No. 59-180711, the upper end of a large number of U-shaped filter cloths arranged so as to go around the bottom of each filter plate is moved by an upper roller protruding above every other filter plate. The filter is suspended by strings on both sides of the filter, and the upper roller is first rotated in one direction to lower the U-shaped filter cloth on one side to drop the dehydrated cake in this area, and then the upper roller is rotated in the opposite direction. We previously devised a filter press that allows the dehydrated cake to fall inside a U-shaped filter cloth on the opposite side. This type of filter press is widely used in practice because it can smoothly discharge the dehydrated cake, but the upper roller must be installed above the filter plate at a distance equal to the height of the filter plate. However, it has been pointed out that the overall height of the filter press equipment is extremely high, requiring a building with a high ceiling.

(Problems to be solved by the invention) The present invention solves these conventional problems,
It was completed with the aim of creating a filter press that has a simple mechanism, allows the overall height of the filter press to be much lower than conventional products, and can reliably discharge the dehydrated cake.

(Means for Solving the Problems) The present invention provides an upper roller and a lower roller protruding above and below each filter plate disposed on a side bar so as to be openable and closable, so that each filter plate is placed between these rollers. Endless filter cloth surrounding the surroundings is provided, and a roller is provided in the lower part between each filter plate, and a continuous V-shaped continuous filter is provided between the upper roller of each filter plate and this roller. It is characterized by a filter cloth stretched in a zigzag pattern.

(Example) The present invention will be explained in more detail with reference to the illustrated embodiment. In FIG. 5 is a tightening cylinder, and 6 is a loose head moved by the tightening cylinder 5.
Reference numeral 7 denotes a large number of filter plates that are supported by the side bar 1 and arranged so as to be able to be opened and closed along the side bar 1. As shown in FIGS. 2 and 3, the upper and lower portions of each filter plate 7 are An upper roller 8 and a lower roller 9 are provided via an arm (not shown).
Using these upper rollers 8 and lower rollers 9, independent endless filter cloths 10 are stretched around each filter plate 7, respectively. As shown in the figure, sprockets 11 and 12 are provided at both ends of the central axes of the upper roller 8 and lower roller 9, and a chain 13 for driving the filter cloth is stretched between these sprockets 11 and 12. The chain 13 and the endless filter cloth 10 are connected to the filter cloth hanging bar 14.
connected by. Further, a bevel gear 15 is provided at one end of the central axis of the upper roller 8, and a bevel gear 17 that can slide on a spline shaft 16 provided above the fixed frames 2, 2.
It's meshing with each other. Therefore, when the spline shaft 16 is driven alternately in both forward and reverse directions, the bevel gear 1
The endless filter cloth 10 connected to the chain 13 by the filter cloth hanging bar 14 rotates forward and reverse around the filter plate 7.

Further, a roller 18 is provided in the lower part between each filter plate 7, 7. In this embodiment, the roller 18 is provided at a lower position than the lower roller 9 via an arm (not shown), and a continuous filter cloth 19 is provided between the upper roller 8 and this roller 18 for each filter. It is stretched in a zigzag pattern so as to form a V-shape between the plates 7, 7. Filter cloth take-up rollers 20 and 21 are provided at both ends of the continuous filter cloth 19, and the continuous filter cloth 19 repeats forward and backward movements while being alternately wound by these filter cloth take-up rollers 20 and 21. . Needless to say, since the movement of the continuous filter cloth 19 is performed in the same direction as the movement of the endless filter cloth 10, no positive winding force is applied to the continuous filter cloth 19, and the winding force is not applied to the continuous filter cloth 19. In order to prevent slack from occurring at the ends of the continuous filter cloth 19 that is moved by friction, a method may be adopted in which the continuous filter cloth 19 is wound by the filter cloth take-up rollers 20 and 21, or the continuous filter cloth 19 is wound by the filter cloth take-up rollers 20 and 21. A system may also be adopted in which the continuous filter cloth 19 is actively driven. Furthermore, instead of providing the filter cloth take-up rollers 20 and 21, the ends of the continuous filter cloth 19 may be connected to each other to form an endless continuous filter cloth, which may be driven by a drive device. The continuous filter cloth 19 stretched in a zigzag manner in a V-shape between each filter plate 7 and the endless filter cloth 10 stretched around each filter plate 7 are different from each other. , 7 are pressed by the tightening sill 5, they come into close contact with each other, and two filter chambers are formed between each filter plate 7, 7. Therefore, it is preferable to use the continuous filter cloth 19 in the form of a mesh belt without filtration performance to facilitate drainage of water.

(Function) In the device constructed in this way, each filter plate 7, 7 is pressed by the loose head 6 in a conventional manner to bring them into close contact, and an endless filter cloth 10 and a continuous filter cloth are placed between each filter plate 7a, 7b. A stock solution is poured into the filter chambers formed by two filter chambers 19 from a stock solution supply port (not shown) to perform filtration. In this way, since the number of filter chambers is approximately twice as many as the number of filter plates 7, the total length of the filter press of the present invention can be shortened compared to a conventional filter press having the same filtration capacity. After filtration, each filter plate 7, 7 is opened, and the spline shaft 16 is rotated to connect the upper roller 8 and lower roller 9 via the bevel gear 17, bevel gear 15, sprocket 11, chain 13, sprocket 12, etc. It rotates in one direction and drives the endless filter cloth 10 stretched around each filter plate 7, for example, clockwise. At the same time, the friction force or the filter cloth take-up rollers 20, 2
The continuous filter cloth 19 is also driven in the same direction by the winding force of 1, and the dewatered cake located on the right side of each filter plate 7 is peeled off from the filter cloth and drawn downward from between the lower roller 9 and the roller 18. fall to. Next, the spline shaft 16
If the flow rate is reversed and the endless filter cloth 10 is driven in the opposite direction, and the continuous filter cloth 19 is also driven in the opposite direction, the dehydrated cake located on the left side of the filter plate 7 will similarly peel off and fall downward, thus causing Any dewatered cake between the filter plates will be easily removed. Note that the amount of movement of the filter cloth to remove the dehydrated cake may be set to a distance approximately equivalent to the height of the filter plate 7, but in some cases, it may be moved by twice that distance to remove the filter cloth from each filter plate 7. It is also possible to move the dehydrated cake on the left side over the upper roller 8 to the right side of the filter plate 7, and to remove two dehydrated cakes from only the right side of the filter plate 7. Furthermore, in the above explanation, it is assumed that the endless filter cloth 10 and the continuous filter cloth 19 repeatedly move forward and backward, but when the ends of the continuous filter cloth 19 are made to continue in an endless manner, the endless filter cloth 10 and the continuous filter cloth 19 move only in the same direction. It is also possible to move the filter cloth sequentially, and in this case there is an advantage that the filter cloth can be easily washed.

(Effects of the Invention) As explained above, the present invention has an endless filter cloth stretched around each filter plate and a continuous filter cloth stretched in a V-shape between each filter plate. The removal of the dehydrated cake can be carried out smoothly and reliably by driving the filter cloths.Moreover, these filter cloths are simply run between each filter plate. Unlike the conventional filter shown in the figure, there is no need to perform complicated lifting and lowering operations of the filter cloths, such as two sets of filter cloths crossing each other between the filter plates, and the structure is simple, which simplifies manufacturing and maintenance work. be able to. Furthermore, since the filter press of the present invention does not require a large distance between the filter plate and the upper roller, the overall height can be reduced by 20 to 40% compared to the conventional filter press described above, and each filter Since two filter chambers can be formed between the plates, the total length of the filter press can also be shortened. Therefore, the present invention can greatly contribute to the development of industry by solving the problems of the conventional technology.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a perspective view of the main part, and FIG. 3 is an enlarged front view of the main part. 1: side bar, 7: filter plate, 8: upper roller,
9: Lower roller, 10: Endless filter cloth, 18:
Roller, 19: continuous filter cloth.

Claims (1)

[Claims] 1 An endless filter cloth 10 that has an upper roller 8 and a lower roller 9 protruding above and below each filter plate 7 disposed on the side bar 1 so as to be openable and closable, and surrounds each filter plate 7 between these rollers. At the same time, a roller 18 is provided in the lower part between each filter plate 7, 7, and a V-shape is provided between each filter plate 7, 7 between the upper roller 8 of each filter plate 7 and this roller 18. A filter press characterized in that a continuous filter cloth 19 extending in a shape is stretched in a zigzag shape.