JPS63166405A - Filter press - Google Patents

Abstract

PURPOSE:To simplify the structure by providing an endless filter cloth between an upper roller at the top and a lower roller at the bottom of a filter plate and also providing a continuous filter cloth in zigzag form between said upper roller and a roller at the bottom side of the adjacent filter plate. CONSTITUTION:Stock solution is put into a filter chamber formed with an endless filter cloth 10 and a continuous filter cloth 19 between filter plates 7a and 7b. After completing filtration and opening the filter plates 7a and 7b, an upper roller 8 and a lower roller 9 are rotated in one direction, and the endless filter cloths disposed with tension around the filter plates 7a provided in every other line are driven, for instance, clockwise. Similarly, the continuous filter cloth 19 is also driven in the same direction by friction force or winding force of a filter cloth wind-up roller 20, and dehydrated cakes on the right side of the filter plate 7a are released and dropped off the filter cloth. Next, by driving in the opposite direction, dehydrated cakes on the left side of the filter plate 7a are released therefrom.

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, as shown in Japanese Utility Model Application Publication No. 59-18071, the present inventor proposed that the upper ends of a large number of U-shaped filter cloths arranged so as to go around the bottom of each filter plate should be connected to every other filter plate. It is suspended by strings on both sides of the upper roller protruding upwards, 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 We previously invented a filter press in which the upper roller is rotated in the opposite direction to drop the dehydrated cake inside the 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, has a simple mechanism, allows the overall height of the filter press to be much lower than conventional products, and is capable of dewatering. This was completed with the aim of creating a filter press that could reliably discharge cake.

(Means for Solving the Problems) The present invention provides an upper roller and a lower roller that protrude above and below every other filter plate among a large number of filter plates arranged on a side bar so as to be openable and closable. An endless filter cloth surrounding the filter plate is stretched between these rollers, and a continuous filter cloth is provided between the upper roller and a roller provided below every other filter plate adjacent to the filter plate. It is characterized by the cloth being stretched in a zigzag pattern.

(Embodiment) The present invention will be explained in more detail below with reference to an illustrated embodiment. In FIG. 1, ill is a fixed frame (2), (
3) A pair of left and right side bars installed between (4)
) is a cylinder head that can run along this side bar (1), (5) is a tightening cylinder, and (6) is a loose head moved by the tightening cylinder (5).

(7a) and (7b) are a 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), and are shown in FIGS. 2 and 3. As shown in FIG. 2, an upper roller (8) and a lower roller (9) are provided above and below every other filter plate (7a) in the group of filter plates via arms (not shown). Using these upper rollers (8) and lower rollers (9), independent endless filter cloths α are stretched around every other filter plate (7a). As shown in the figure, sprockets (1)) and (12) are provided at both ends of the central shafts of the upper roller (8) and lower roller (9), and a filter cloth is installed between these sprockets (1)) and (12). A driving chain (13) is stretched. And this chain (13
) and the endless filter cloth aIJ are connected by a filter cloth hanging bar (14). Furthermore, a bevel gear (15) is provided at one end of the central shaft 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) is provided. ) are meshed with each other. Therefore, when the spline shaft (16) is driven alternately in both forward and reverse directions, the bevel gears (15), (17
), the chain (13) is driven, and the endless filter cloth side connected to the chain (13) by the filter cloth suspension lever (14) rotates forward and backward around the filter plate (7a).

Further, a roller (18) is provided below each filter plate (7b) adjacent to every other filter plate (7b) on which the endless filter cloth αe is stretched, via an arm (not shown). A continuous filter cloth (19) is stretched in a zigzag pattern between the above-mentioned upper roller (8) and this roller (18). In this embodiment, a continuous filter cloth (19) is stretched through an arm to the filter plate (7b). Although the roller (18) is provided, the roller (18) may be provided on the filter 1M (7a) via an arm or chain.At both ends of the continuous filter cloth (19), there are filter cloth take-up rollers (20), ( 2
1) is provided, and the continuous filter cloth (19) repeats forward and backward movements while being alternately wound up by these filter cloth take-up rollers (20) and (21).
The continuous filter cloth (19) moves at the same speed and in the same direction as the endless filter cloth α.
9) A continuous filter cloth (19) that is moved by friction with the endless filter cloth (II) without applying any active winding force to l.
The filter cloth take-up roller (20
), (21) may be adopted, or a method may be adopted in which the continuous filter cloth (19) is actively driven by the filter cloth winding a-ra (20), (21). 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 pattern and the endless filter cloth Ql stretched around every other filter plate (7a) are different from each other when each filter plate (7a), (7b) When pressed by the tightening cylinder (5), they come into close contact with each other and form a filter chamber between them. Therefore, if one-sided filtration is sufficient, either the endless filter cloth α or the continuous filter cloth (19) can be replaced with a belt-like one that does not have filtration performance, and in that case, the filter cloth can be replaced. It is preferable to replace the endless filter cloth α, which requires a lot of effort.

(Function) The device configured in this way can be used to attach each filter plate (7a
), (7b) are pressed together by the loose head (6), and an endless filter cloth α and a continuous filter cloth (19) are formed between each filter plate (7a) and (7b). The stock solution is poured into the inside of the reducing wheel from a stock solution supply port (not shown) and filtered. After the filtration is completed, the filter plate (7a), (
7b) and then rotate the spline shaft (16) to connect the bevel gear (17), bevel gear (15), sprocket (1)), chain (13), and sprocket (12).
) etc., the upper roller (8) and lower roller (9) are rotated in one direction, and the endless filter cloth 01 stretched around every other filter plate (7a) is rotated clockwise, for example. drive At the same time, the continuous filter cloth (19) is also driven in the same direction by the frictional force or by the winding force of the filter cloth winding rollers (20) and (21), and is located on the right side of the filter plate (7a). The dehydrated cake is peeled off from the filter cloth and falls downward.The spline shaft (16) is reversed to drive the endless filter cloth αl in the opposite direction, and the continuous filter cloth (1
9) is also driven in the opposite direction, the dehydrated cake located on the left side of the filter plate (7a) will similarly peel off and fall downward, and thus the dehydrated cake between all the filter plates can be easily removed. becomes. The amount of movement of the filter cloth to remove the dehydrated cake may be a distance equivalent to the height of the filter plate (7), but in some cases, it may be moved twice that distance.
Move the dehydrated cake on the left side of the filter plate (7a) over the upper roller (8) to the right side of the filter plate (7a) and filter +7N (7
It is also possible to remove two dehydrated cakes from only the right side of a). Furthermore, in the above explanation, continuous filter cloth (1
Although the forward and backward movements are repeated in 9), if the ends of the continuous filter cloth (19) are made continuous, it may be moved in only one direction. 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 includes an endless filter cloth stretched around every other filter plate and a continuous Vt filter cloth stretched in a zigzag shape between each filter plate. By driving, the removal of the dehydrated cake can be carried out smoothly and reliably, and these filter cloths are simply run between each filter plate. There is no need to perform complicated lifting and lowering operations of the filter cloths, such as the two sets of filter cloths crossing each other between the filter plates as in conventional filters, which simplifies the structure and 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. 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): Sidebar, (7a), (7b): Filter plate, (
8) Two upper rollers, (9): Lower roller, αI: Endless filter cloth 8, (19): Continuous filter cloth. Figure 1 Figure 3

Claims (1)

[Claims] Upper rollers (8
) and a lower roller (9) are provided protrudingly, and an endless filter cloth (10) surrounding the filter plate (7a) is stretched between these rollers, and the upper roller (8) and the filter plate (
A filter press characterized in that a continuous filter cloth (19) is stretched in a zigzag pattern between every other filter plate (7b) adjacent to the filter plate (7a) and a roller (18) provided below.