JPH0333365B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a filter cloth running type filter press that discharges cake generated between filter plates in a filtration process by running a filter cloth. .

(Prior Art) As shown in Japanese Patent Publication No. 52-14860, a typical conventional filter cloth running type filter press includes a filter cloth mounting bar that moves up and down between each filter plate in a seesaw manner. There is a known method in which the upper and lower ends of two adjacent filter cloths are attached to these filter cloth attachment bars, and the cakes are alternately discharged by alternately moving the filter cloth attachment bars up and down after filtration. It is being However, in this type of filter press, the filter cloth mounting bar, the liquid supply plate, and the four filter cloths move intersectingly between the few filter plates, so they often interfere with each other and malfunction. They had drawbacks such as the need for time and effort to replace them because they were connected.

In order to solve this problem, the present inventor installed an upper roller at a high position above every other filter plate to prevent the filter cloth from crossing over on the other side when discharging the cake on one side. Although this type of filter press was first devised and proposed in Utility Model Publication No. 59-33446, this type of filter press had another problem in that the overall height of the device was extremely high.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and has a simple structure, fewer failures, easy filter cloth replacement, and increases the overall height of the machine. It was completed with the aim of creating a filter press that does not require a running filter cloth.

(Means for solving the problem) An endless filter cloth is stretched around each of a large number of filter plates, and above each of these filter plates, the cake discharged upward is turned downward. This device is characterized in that a cake inverting device is attached to the filter plate so that it can be opened and closed.

(Example) Next, the present invention will be described in more detail with reference to illustrated examples.

In the figure, 1 is a large number of filter plates provided between the fast head 2 and the loose head 3, 4a, 4
5 b is an upper roller protruding above each filter plate 1;
is a lower roller projecting below each filter plate 1. Reference numeral 6 denotes an endless filter cloth stretched between the upper rollers 4a, 4b and the lower roller 5 so as to surround each filter plate 1. In this embodiment, the height of the upper rollers 4a, 4b is equal to the height of the filter plate 1.
Each sheet is said to have a zigzag pattern of alternating heights, but
The upper rollers 4a, 4b may be at the same height.

7a and 7b are upper sprockets provided coaxially with the respective upper rollers 4a and 4b, 8 is a lower sprocket provided slightly above the lower roller 5, and a filter cloth driving chain stretched between these sprockets. 9 and the filter cloth 6 are connected via a filter cloth drive bar 10 whose both ends are supported by the filter cloth drive chain 9. 11a and 11b are spline shafts that mesh with the upper sprockets 7a and 7b via bevel gears and drive the filter cloth driving chain 9 together with the upper sprockets 7a and 7b. It is installed in two levels, upper and lower.

In the present invention, a cake inversion device 12 is installed above such a group of filter plates. The cake reversing device 12 is composed of two plates whose lower ends are supported near the axis of every other upper roller 4b, and whose central part can be opened and closed by a hinge 13, and whose central part is connected to the upper roller 4a. It is curved upward so as to straddle the As shown by the dashed line in the figure, this cake inverting device 12 is for inverting the cake discharged upward downward, and its shape is not only semicircular as shown in the figure but also chevron, inverted U-shape, etc. You can also use it as The cake reversing device 12 is opened and closed together with the filter plate 1.
Although the central hinge 13 is provided for this purpose, this reversing device does not have to be attached to the filter plate;
In that case, a semicircular, chevron-shaped, inverted U-shaped, etc. reversing device may be fixedly attached to the frame other than the filter plate in advance in accordance with the opening position of the filter plate. Since the material of the cake inverting device 12 is required to have a certain degree of rigidity and cake non-adhesion, metal, synthetic resin, or a metal lined with synthetic resin or rubber is used.

(Function) The filter cloth drive bar 1 configured in this way is
0 is located at the upper end of the upper rollers 4a, 4b, each filter plate 1 is closed, and filtration is performed in the filter chamber formed between the filter cloths 6, 6. After filtration, each filter plate 1 is closed as in the conventional case. Open to each other. Next, as shown in the figure, the filter cloths 6 around each filter plate 1 are run in opposite directions, for example clockwise for odd numbered filter plates 1 and counterclockwise for even numbered filter plates 1. let As a result, the cake 20 sandwiched between the two filter cloths 6, 6 on the side running downward peels off from the filter cloth 6 at the lower roller 5 and falls downward, as shown in the figure, but the cake 20 runs upward. The cake 20 sandwiched between the two filter cloths 6, 6 on the side to be removed moves above the filter plate 1, and is peeled off from the filter cloth 6 at the upper roller 4b. In the present invention, since the cake inverting device 12 is provided above the filter plate group, the cake discharged upward in this way is inverted downward by the cake inverting device 12 as shown in the figure. It will fall downward through the gap. If the filter cloth drive chain 9 and the filter cloth 6 are reversed when the filter cloth drive bar 10 moves to the vicinity of the lower sprocket 8 as shown in the figure, the peeled cake remaining above the filter plate 1 will be removed. is more reliably discharged downward through the gap between the filter plates 1, 1. As explained above, the present invention makes it possible for the first time to discharge the cake above the filter plate 1, which has been considered taboo until now, by employing the cake reversing device 12. Since it can be opened and closed together with the filter plate 1, the filtration process in which the filter plate 1 is closed can also be carried out without any problems as in the past. In the embodiment described above, the cake is discharged while the filter cloth 6 is reversed halfway, but the filter cloth 6 can be rotated continuously in a fixed direction with the lower roller 5 and the lower sprocket 8 coaxial. It is also possible to discharge the cake at the same time.

(Effects of the Invention) As explained above, the present invention discharges the cake on one side of the filter plate downward, moves the cake on the other side above the filter plate and peels it from the filter cloth, and removes the cake from the filter cloth. The cake is inverted downward using a cake inverting device provided above the upper rollers, and the cake is allowed to fall between the filter plates. Therefore, in the present invention, the endless filter cloth only rotates around the filter plate when discharging the cake, and the filter cloth mounting bar and the filter cloth do not intersect as in the past, so there are fewer failures.
Furthermore, since the filter cloth is stretched independently for each filter plate, it is extremely easy to replace the filter cloth. Moreover, in the present invention, there is no need to lift the filter cloth high above the filter plate, and the height of the entire apparatus can be significantly lowered compared to the filter press of Utility Model Publication No. 59-33446. Since it can be opened and closed together with the filter plate, there is no risk of it becoming an obstacle when dehydration filtration is performed with the filter plate closed. Therefore, the present invention greatly contributes to the development of industry as a filter cloth running type filter press that eliminates the problems of the conventional filter press.

[Brief explanation of the drawing]

The drawings are cross-sectional views showing embodiments of the present invention. 1: Filter plate, 6: Filter cloth, 12: Cake inversion device.

Claims (1)

[Claims] 1. An endless filter cloth 6 is stretched around each of a large number of filter plates 1, and a cake inversion device 12 is installed above these filter plates 1 to invert the cake discharged upwards downward. A filter cloth traveling type filter press characterized by being attached to a plate 1 so as to be openable and closable.