JP2565860Y2 - Cake peeling device in horizontal vacuum filter. - 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 cake peeling device in a horizontal vacuum filter.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 32-8591 and Japanese Patent Publication No. 55-33368 are examples of this type of horizontal vacuum filter. The invention of Japanese Patent Publication No. 32-8591 is to supply a stock solution to a large number of filter boxes attached to an endless belt in a horizontal traveling portion, perform suction filtration, rotate the filter box to drop a cake, and then filter the filter box. Is removed by washing.

The invention of Japanese Patent Publication No. 55-33368 is
Run the endless filter cloth over the top of the filtration box,
The undiluted solution was supplied onto the filter cloth, and the filter box was vacuum-suctioned from below, and at the time of vacuum suction, the suction box was run in synchronization with the filter cloth to prevent the filter cloth and the suction box from slidingly contacting each other. Things.

[0004]

[Problem to be solved by the present invention]
In 2-8591 Patent invention, but filtration boxes can be continuous filtration operation orbiting, with respect to the removal of cake during filtration box, can not be removed alone is peeled off with poor cake to turn it. Therefore, the filter box is rotated and washed. However, since the cake is mixed into the washing water, there is a problem that the recovery rate (the collection rate of solids in the stock solution) is reduced.
Japanese Patent Publication No. 55-33368 discloses that although the filter box runs in synchronization with the filter cloth, there is no sliding portion and the sealability is good. However, for removing the cake generated on the filter cloth, a scraper or the like is used. Must be used. In this case, the cake that has reached the eyes of the filter cloth cannot be removed.

[0005]

According to the present invention, in order to solve the above-mentioned conventional problems, a filter box provided with a metal filter medium having one end pivoted therein is provided, and the filter box is driven by an endless drive. number as well as to circulating attached to the band, the lower surface side during horizontal travel of the filtering box, and disposed reciprocable suction then box to run lines of the concatenated filtered boxes to a vacuum pump, the suction The box and the filter box can be connected and disengaged freely, while a cake peeling device is provided around the traveling area of the filter box separated from the suction box . And the above-mentioned cake peeling device is an air blow device that faces the virtual movement area of the suction port of the filter box when the filter box dissociates from the suction box and circulates, and makes the cake float from the metal filter medium. It is for. Further, when the filtering box is inverted traveling, so as to face the front and back surfaces of the metal filter material depending from the filtration box a washing nozzle provided, in which as wash filtrate slag adhering to the metal filter material after the cake peeling .

[0006]

The apparatus according to the present invention is configured as described above, and the stock solution supplied to the horizontal traveling portion of the filter box provided with the metal filter medium is separated into solid and liquid by suction of the suction box.
The filtrate is taken out of the machine, and a cake is formed on the metal filter medium. The cake is transported as the filter box travels, and when the filter box dissociates from the suction box and circulates, high-pressure air is blown into the back surface of the metal filter medium from the suction port of the filter box, and the cake is removed from the metal filter medium. Floating from. Further, when the filter box rotates downward, the metal filter medium pivotally attached at one end to the filter box rotates and hangs down. At this time, the cake is peeled off by its own weight when the metal filter medium is separated from the filter box because the metal filter medium having a better releasability than the conventional filter cloth is used. Next, the filter residue still attached to the metal filter medium is washed and removed from the front and back surfaces of the metal filter medium hanging down from the filter box.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Is a metal filter medium, as shown in FIG. 4, whose traveling tip is pivotally attached to a box-shaped filter box 2, so that the metal filter medium 1 can rotate and separate from the filter box 2. . The filtration box 2 is provided with a filtration chamber 2a for supplying a stock solution above the metal filter medium 1 installed therein, and a filtration chamber 2b below the metal filter medium 1.
A long groove-shaped suction port 2 c for filtrate is provided at the bottom of the filtration box 2. Reference numeral 3 denotes an endless drive belt that is rotatably disposed, and as shown in FIG.
A large number are attached, and these filter boxes 2... Reference numeral 4 denotes a suction box, which is provided below the horizontally traveling filter box 2 so as to be reciprocally movable in the traveling direction of the filter box 2 and connected to a vacuum pump (not shown) and a jack 5. When the suction box 4 is raised, the suction box 4 and the suction port 2c of the filtration box 1 communicate with each other. When the suction box 4 is moved in synchronization with the travel of the filtration box 2, the undiluted solution is supplied to the filtration chamber 2 a of the filtration box 2 at the horizontal traveling start section of the filtration box 2, and the filtrate is sucked at the horizontal traveling section to remove the metal. Solid-liquid separation can be performed with the filter medium. At the reciprocating end of the suction box 4, suction is stopped by a valve (not shown), and the suction box 4 is lowered so that the suction box 4 can return. FIG.
Is a case where one suction box 4 is provided. In this case, the suction is interrupted while the suction box 4 is returning. FIG.
A pair of suction boxes 4 is provided. In this case,
By alternately operating the pair of suction boxes 4.4 at a different timing, the filtration box 2 can be constantly sucked.

After passing through the horizontal traveling portion, the filter box 2 gradually rolls over as shown by the phantom line in FIG. Reference numeral 6 denotes an air blow device, which is provided so as to face a virtual moving area of the suction port 2c of the filter box 2. In the embodiment of the present application, the filter box 2 is rotated to form the metal filter medium 1 and cake. In the vertical position,
The high pressure air injected from the air blow device 6 is
, And is sprayed on the back surface of the metal filter medium 1 so that the cake floats up from the metal filter medium 1. Reference numeral 7 denotes a guide roll for smoothly rotating the metal filter medium 1 moving away from the traveling filter box 2. When the metal filter medium 1 guided by the guide rolls 7 hangs down from the filter box 2, Since the metal filter medium has good releasability, the cake is separated from the metal filter medium 1 by its own weight and falls. Numeral 8 denotes washing nozzles provided opposite to the front and back surfaces of the metal filter medium 1 hanging down from the filter box 2 when the filter box 2 runs reversely, and the metal filter medium 1 is hung down in a state where it is most easily washed. Wash the metal filter medium
To restore the filtration performance. After the air blow, a scraper 9 for scraping the cake may be provided at a position where the metal filter medium 1 rotates and separates from the filter box 2. Reference numeral 10 denotes a supply pipe for the stock solution, and reference numeral 11 denotes a supply pipe for the washing water.

[0009]

As described above, in the present invention, the cake can be discharged from the filter box by inverting the filter box because the metal filter medium is rotatably pivoted inside the filter box. . That is, in a conventional apparatus using a filter box, the filter box is simply rotated and turned over, and the cake with poor filtration cannot be completely peeled off. In the lower traveling part where the filter box rotates and travels, the metal filter medium, which has better releasability than the conventional filter cloth, rotates and hangs down from the filter box together with the cake, so that the cake is dropped by its own weight. Can be done. Further, an air blow device is provided as a cake peeling device, and high-pressure air is blown into the metal filter medium holding the cake in the filter box from the back surface, and the cake is lifted from the metal filter medium so that the metal filter medium rotates. The cake can be easily peeled when the cake is separated from the filter box. In addition, if the washing nozzle is provided on both the front and back surfaces of the metal filter medium hanging down from the filter box at the reversing traveling portion of the filter box, the filter residue adhering to the eyes of the metal filter medium can be washed from both sides. You can do it. In addition,
If washing water is supplied to the filtration box at the subsequent stage of the horizontal traveling unit, cake washing is also possible.If a box-shaped filtration box is used, it is easy to seal between the filtration boxes in the horizontal traveling unit, and raw water flows out. There is no one.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of a filter box portion of the horizontal vacuum filter according to the present invention.

FIG. 3 is a cross-sectional view of another embodiment of a filter box part.

FIG. 4 is a vertical sectional side view of the filtration box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal filter medium 2 Filtration box 2c Suction port 3 Drive band 4 Suction box 6 Air blow device 8 Cleaning nozzle

Claims (1)

(57) [Scope of request for utility model registration] 1. A filter box 2 in which a metal filter medium 1 having one end pivotally mounted is rotatably provided therein, and a large number of the filter boxes 2 are attached to an endless drive band 3 so as to orbit. At the same time, a suction box 4 connected to a vacuum pump in the traveling direction of the filter box 2 is disposed on the lower surface side of the filter box 2 when the filter box 2 is running horizontally, and the suction box 4 and the filter box 2 are connected and disengaged. On the other hand, on the lower side of the filtration box 2 detached from the suction box 4, it is located within the virtual movement area of the suction port 2 </ b> C of the filtration box 2 around the traveling area.
The air blow device is installed, and the filter box 2 runs in reverse.
The metal filter medium 1 hangs down from the filter box 2
A cake peeling device in a horizontal vacuum filter , characterized by washing .