JP2544173Y2 - Cake peeling equipment in vertical filter press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a vertical filter press in which a large number of filter plates are moved and opened and closed along a guide rod provided in a vertical direction. Instead of using a metal filter medium as a filter medium, a filter press capable of completely peeling and removing a cake by stretching a release sheet on the metal filter medium is proposed.

[0002]

2. Description of the Related Art Conventionally, a vertical filter press using a long filter cloth as a filter medium is well known. Tokiko 46-1
The invention of No. 4957 is an example, and the present invention relates to an apparatus for preventing a long filter cloth from meandering when traveling.

[0003]

The vertical filter press presses a stock solution having a uniform thickness supplied in a horizontal direction from above and below, and is most rational in terms of filtration. Therefore, with a stock solution having good filterability, a large amount of stock solution can be supplied to the filtration chamber to perform highly efficient filtration. In addition, since the filter plates are stacked in the vertical direction, there is an advantage that the filter plate does not occupy an installation area. However, it is difficult to remove cake clogged with filter cloth in the case of a stock solution having poor filtration properties, that is, poor peeling properties of the cake. Even if it is removed using a scraper or a washing machine outside, the clogged cake cannot be completely removed. In the case of a long filter cloth, there is also a problem of meandering, and it may be necessary to replace the filter cloth because it is partially clogged or damaged.

[0004]

SUMMARY OF THE INVENTION The present invention solves the problem of peeling a cake in a vertical filter press, and the gist of the invention is to freely move along a vertically provided guide rod. a number of filter plates are laminated, these filtration
It wrapped around the guide roll 4.14 provided on the left and right of the plate 1.
Vertical filter press with release sheet 2 movably arranged
In the above, a filter medium made of metal mesh is laid on the filter bed of these filter plates, and a support pivotally attached to the side surface of the filter plate 1.
The tension roll 11 is provided on the holding arm 11a,
Contact roll 11 from below the release sheet 2
When the filter plate is opened, the release sheet is separated from the metal mesh and the sealing surface of the filter plate.

[0005]

In the filter press, the filter plate is strongly tightened in order to cope with high-pressure filtration. Therefore, the filter medium does not peel off from the filter bed or the sealing surface if the filter medium is only opened after being attached. In this invention, the release sheet is also strongly pressed against the sealing surface and the metal mesh, but at this time, when the filter plate is opened , the tension roll peels off.
Since the release sheet is lifted, it can be smoothly run between the filter plates, and the cake formed on the release sheet can be transported out of the row of filter plates and removed. The present invention will be specifically described below with reference to the drawings.

[0006]

1 is a schematic side view of a vertical filter press, in which reference numeral 1 denotes a filter plate provided in multiple stages in the vertical direction.
A release sheet made of a net made of a synthetic resin material stretched in a zigzag shape between filter plates, a drive roll of the release sheet 2, a guide roll 4, a guide roll 5, a tension roll, a washing machine 6, and a filter plate 7 1 is a guide pole, 8 is a fixed frame provided above the guide pole 7, 9 is a movable head, and 10 is a conveyor for receiving cake. Although a fastening device is provided between the movable head 9 and the frame 8, it is not shown.

Next, the structure of the filter plate will be described with reference to FIGS. 3, reference numeral 1a denotes a filtration bed provided with a large number of through holes in a lattice, 1b denotes a metal mesh laid on the filtration bed 1a, and D denotes a diaphragm provided on the back surface of the filter plate 1. Reference numeral 11 denotes a tension roll for lifting the release sheet 2, and the base of the support arm 11a is pivotally attached to the side surface of the filter plate, and a spring is interposed at the pivoted portion. It comes into contact with the release sheet 2 stretched above the metal mesh 1b elastically from below and lifts it. 2 and 3, the release sheet 2 is provided for each filter plate, reference numeral 12 denotes a drive roll of the release sheet 2, reference numeral 13 denotes a drive motor thereof,
Reference numeral 14 denotes a guide roll, and reference numeral 2a denotes a driving band of the release sheet 2.

The device according to the present invention is configured as described above. When the filter plate 1 is closed, the tension roll 11 is held down by the release sheet 2 (the driving band 2a in FIG. 3). It is folded within the thickness of the filter plate 1, and a filtration chamber is formed between each filter plate. Therefore, the stock solution supplied to the filtration chamber is filtered by the release sheet 2 and the metal mesh 1b, and a cake is formed on the release sheet 2.

Next, in order to remove the cake on the release sheet 2 formed as described above, the filter plate 1 was opened, and was held by the release sheet 2 and folded within the thickness of the filter plate. The tension roll 11 lifts the release sheet 1 by its elastic force, and the metal mesh 1b
Float from face and seal face. This allows
The release sheet 2 can be freely moved between the opened filter plates, and the cake formed on the release sheet 2 can be transported outside the row of filter plates and removed.

In the above-described cake removing operation, the release sheet 2 automatically separates from the metal mesh 1b and the sealing surface in conjunction with the opening and closing of the filter plate 1.
The tension roll 11 becomes a roller when the release sheet 2 travels, and can smoothly travel the roller. As described above, the peeling sheet 2 for transporting the cake has good peelability of the cake with the synthetic resin material, and, of course, travels out of the row of filter plates. The cake can be removed. Also, the metal mesh 1b used as a filter medium is less likely to adhere to the cake than the conventional filter cloth, and even if the cake passed through the release sheet 2 is separated from the surface of the release sheet 2, the release sheet 2 side Can be peeled off with the cake. In the case of cakes with particularly poor peeling properties,
After the filtration is completed and the pressure of the diaphragm D and the like is released, the cake on the metal mesh side can be attached to the release sheet side and removed by reverse blowing with high pressure air from the filtrate port.

[0011]

As described above, this invention uses a metal mesh as a filter medium and a release sheet composed of a synthetic resin or the like on the upper surface thereof and which can run between the filter plates, and presses the tension roll against the release sheet from below. Let me
The cake is separated from the metal mesh and the sealing surface of the filter plate in conjunction with the opening and closing of the filter plate, and the automatically generated cake is transported out of the row of filter plates and completely removed. This completely solves the conventional problem of this type of vertical filter press.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a vertical filter press according to the present invention, showing a case where a long release sheet is used.

FIG. 2 is a plan view of a filter plate portion of the vertical filter press according to the present invention, showing a case where a short release sheet is used.

FIG. 3 is a side view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Filter plate 1a Filtration floor 1b Metal mesh 2 Release sheet 4.14 Guide roll 7 Guide pole 11 Tension roll 11a Support arm

Claims (1)

(57) [Scope of request for utility model registration] 1. A movably large number of filter plates 1 are stacked along a guide rod 7 which is provided in the vertical direction, the left and right of the filter plate 1
Release sheet 2 wrapped around provided guide roll 4.14
The filter media 1b made of a metal mesh is laid on the filter bed 1a of the filter plate 1 and the support is pivotally attached to the side surface of the filter plate 1.
A tension roll 11 is provided on the arm 11a.
Roll 11 is resiliently contacted from below the release sheet 2.
A peeling device for cake in a vertical filter press, characterized in that when the filter plate 1 is opened, the release sheet 2 is separated from the metal mesh 1b and the sealing surface of the filter plate 1.