JPH0576706A - Cake removal equipment in vertical filter press - Google Patents

Abstract

PURPOSE:To supply stock solution to each filter chamber on an average and to completely remove cakes by laying filter media made of metal mesh on a filter bed of each filter plate installed freely movably up and down, providing a water permeable removal sheet so that it may cover the filter mediums and making the peeling sheet travel up to outside the row of the filter plates. CONSTITUTION:A lot of filter plates 1 is freely movably laminated along a guide lever installed in the vertical direction. On the filter bed of the filter plates 1 is laid filter medium 3 made of metal mesh and simultaneously above the filter medium 3 laid on each filter plate 1 is provided a water permeable removal sheet 5 made of synthetic resin materials, etc., so that it may cover the filter medium 3. The peeling sheet 5 is made to travel up to outside one row of the filter plate 3. As a result, a filter press which does not take too much installation space and has the advantage of vertical filter presses that comes from supplying stock solution to each filter chamber on an average and which in addition, completely removes cakes is obtained.

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 cake removing device in a vertical type filter press.

[0002]

2. Description of the Related Art Conventionally, filter plates are laminated so as to be movable along a guide rod provided in the up-down direction, and a long filter cloth is arranged so as to sew between the filter plates so that the filter cloth can run freely. Filter presses are well known. The invention of JP-B-46-14957 is one example. The present invention relates to a device for preventing a long filter cloth from meandering.

[0003]

Conventionally, the vertical type filter press does not occupy the installation area, and since the intervals between the laminated filter plates can be set relatively wide, it is suitable for filtering the stock solution having good filterability. However, it is not suitable for a stock solution with poor peelability of cake. That is, in the case of using the filter cloth as the filter medium,
The filter cloth is run and the cake is mechanically scraped outside the row of filter plates using a scraper. However, even with this method, it is not possible to remove the cake that has entered the eyes of the filter cloth.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems by using a metal filter medium and a release sheet in place of a filter cloth in a vertical type filter press. The place is as follows.

That is, a large number of filter plates are laminated so as to be movable along a guide rod provided in the vertical direction, and a filter material made of a metal mesh is laid on the filter bed of these filter plates and attached to each of the filter plates. A release sheet is provided above the filter medium so as to cover the filter medium, and the release sheet is allowed to run between the filter plates. As the release sheet to be run between the filter plates, a long strip-shaped release sheet may be arranged so as to sew between the filter plates, and a short release sheet may be provided for each filter plate unit. Then, this may be reciprocated between filter plates. Further, in the case of a cake having a poor peeling property, high pressure air is jetted from the take-out hole of the filtrate.

[0006]

In the present invention, since the cake is not easily attached because the metal filter medium is used and the upper surface of the cake is covered with the release sheet, the generated cake is deposited on the release sheet. Therefore, the filtration is completed, the filter medium is opened, and the release sheet is run, whereby the accumulated cake is transferred to the outside of the filter plate row, and the release sheet is inverted and dropped to be removed at the portion. At this time, a scraper may be used in the case of a cake having poor peelability because it is outside the row of filter plates. Further, when removing the cake described above, the cake generated between the release sheet and the metal filter medium is one that is peeled off together with the cake of the release sheet because it is peeled off from the filter medium because the filter medium is metal. is there. Even in this case, the remaining cake can be completely removed by ejecting high-pressure air from the filtrate outlet provided in the filtration bed on the back surface of the filter medium. Further, in this invention, since the filter plate is horizontally arranged and the filtration chamber is horizontal, the undiluted solution is uniformly supplied to the filtration surface, and a horizontal filtration layer is formed on the filter medium. Therefore, when pressurizing with a diaphragm without the thickness of the undiluted liquid layer in the upper part and the lower part of the filtration chamber being different, as in the conventional vertically formed filtration chamber (horizontal filter),
It is possible to carry out filtration while maintaining a stable cake filtration layer without disturbing the stock solution. The release sheet is made of a synthetic resin material having a good cake releasability, and a scraper or the like is not necessarily required to release the cake from the release sheet. Hereinafter, the present invention will be specifically described with reference to the drawings.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 is a filter plate, which is laminated so that it can move up and down along a guide pole 2 as shown in FIG. As shown in FIG. 3, a metal mesh 3 is laid. Reference numeral 4 is a filtration bed that supports the metal mesh 3. Reference numeral 5 is a release sheet provided so as to cover the above-mentioned metal mesh, and in the one shown in FIGS. 1 and 2, a long release sheet 5 is used and this is stretched in a zigzag shape between filter plates. In this way, all the plates are driven at the same time.
Reference numeral 6 is its drive roll, 7 is a guide roll, and 7
a is a tension roll, 8 is a washing machine, 9 is a cake tray, 1
0 indicates a tightening cylinder. Note that FIG. 1 shows a state in which each of the filter plates is opened, and FIG. 2 shows a state in which they are closed.

Next, the structure of the filter plate will be described in detail with reference to FIGS. 1 and 3. The above-mentioned filter plate 1 is provided with a recess 1a on its upper surface, and a filter bed 4 is provided in this recess 1a.
The metal mesh 3 is laid on the top. Further, a diaphragm chamber 1c is provided on the lower surface of the filter plate 1, and a diaphragm D is provided in this diaphragm chamber 1b. In FIG. 3, reference numeral 1c is a high-pressure water inlet, and 1d is a drainage port.
Further, 1e is an outlet for the filtrate. Note that FIG. 3 shows an example in which a release sheet is provided for each filter plate so that they run independently. Further, in FIG. 3, reference numeral 11 is a drive roll, and 12 is a guide roll. Further, in FIG. 4, reference numeral 13 is a drive motor, 13 is a pole bracket into which the guide pole 2 is inserted, and 15 is a drive string for the release sheet.

Since the apparatus according to the present invention is configured as described above, the undiluted solution supplied between the filter plates is filtered by the metal mesh 3 and the cake produced by squeezing is placed on the release sheet 5. accumulate. Therefore, in order to remove it, the release sheet 5 may be run and inverted. That is, when the release sheet 5 is run to the outside of the row of the filter plate 1 and the guide rolls 7 and 12 are reversed there, the release sheet 5 is made of a material such as a synthetic resin having good releasability of the cake. Therefore, it can be peeled off and dropped. In addition, a scraper may be used or cleaning may be performed for those that are not peeled off even in this way. Further, the cake leaked from the release sheet 5 can be removed by air-blowing from the filtrate extraction hole depending on the time.

[0010]

As is apparent from the above description, since the filter press according to the present invention is a vertical type, the stock solution layer supplied to the filtration chamber has a uniform horizontal thickness and uniform filtration. In addition, since the filter medium is a metal mesh, it is less likely to be clogged and easily peels off even if it adheres. Furthermore, in addition to this, a release sheet for covering this filter medium is provided. It is possible to solve the problem of renewing the filter medium of this kind of filter press without causing clogging.

[Brief description of drawings]

FIG. 1 is a schematic side view of a filter press according to the present invention.

FIG. 2 is also a schematic side view for explaining the opening / closing mechanism of the filter plate, showing a state in which the filter plate is closed.

FIG. 3 is likewise a vertical side view of a filter plate portion of another embodiment.

FIG. 4 is also a plan view of a filter plate portion of another embodiment.

[Explanation of symbols]

 1 Filter plate 2 Guide pole 3 Metal mesh 4 Filtration floor 5 Release sheet

Claims (4)

[Claims] 1. A plurality of filter plates (1) are movably stacked along a guide rod (2) provided in a vertical direction, and a filter bed (4) of these filter plates (1) is stacked.
The filter material 3 made of metal mesh is laid on the
Above the filter media 3 laid on each of the filter plates 1, the filter media 3
A release sheet 5 is provided so as to cover the sheet, and the release sheet 5 is allowed to travel between filter plates, and is a device for removing a cake in a vertical filter press. 2. A device for removing cake in a vertical filter press, wherein the release sheet 5 according to claim 1 is formed into a series of long strips, and the filter plates are sewn together in a zigzag pattern. .. 3. A cake removing device for a vertical filter press, wherein the release sheet 5 according to claim 1 is provided separately for each filter plate. 4. The cake removing device for a vertical filter press according to claim 1, wherein a filtrate outlet provided in the filtration bed is connected to and detachable from a high-pressure air source.