JP3389964B2 - Horizontal vacuum belt 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 horizontal vacuum belt filter for separating sludge from solid-liquid by utilizing vacuum negative pressure.

[0002]

2. Description of the Related Art Conventionally, a vacuum suction filter in which an endlessly connected filter box circulates horizontally is well known.
JP-B-51-31619, JP-B-55-33368
No. 5-5522 is an example.

That is, in the invention of Japanese Examined Patent Publication No. 51-31619, a large number of filtrate boxes are mounted on a revolving endless chain, and these are circulated, and a suction box is provided on the lower surface of the horizontally revolving traveling portion to be mounted on a filter cloth. The supplied slurry is sucked. Also, Japanese Examined Japanese Patent Sho 55
In No. 33368, a suction box reciprocally movable along the traveling direction of the filter belt is provided on the lower surface of the revolving endless filter belt to suck the slurry supplied onto the filter belt. Further, in Japanese Examined Patent Publication No. 5522/1993, a suction box is provided below the filtration box that is connected in an endless manner and travels in a circular manner, and the suction box is reciprocally movable along the circulation direction of the filtration box. It can be attached to and detached from the bottom surface of.

[0004]

[Problems to be Solved by the Invention]
In the case where the suction box is fixed as in the invention of 1-31619, since the filtrate box is sucked, a large amount of power is required to orbit the filtrate box, and the sealing of the adsorption surface and the filtrate before and after It is difficult to seal the box joints. Also, in the invention of Japanese Examined Patent Publication No. 55-33368, a suction box is provided on the lower surface of the filter belt so as to reciprocate, and the filter belt is sucked. However, the filter belt itself is driven to run the filter belt. Depending on the solution, a strong filter belt is required, and a filter belt and a supply device must be selected depending on the processing solution. Further, in Japanese Patent Publication No. 5522/1993, it is difficult to dissociate the filtrate box and the suction box from each other, and an elevating device for moving the suction box up and down is required, which makes the structure complicated. It is difficult to join the liquid box.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the present invention is to wrap an endless filter cloth between a large number of rolls so that the filter cloth can run freely. , wrapped around freely travel filtration belt on the inner surface side of the filter cloth made of flexible material forming a filtration chamber to the surface, and tuned by coalesced with these filter cloth and filtered belt in its horizontal run portion A vacuum suction box that is made to run and communicates with the filtration chamber of the filtration belt below the coalescing running portion of the filtration belt, and is in close contact with the filtration belt and can reciprocate along the running direction. Is provided.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Since the above-mentioned filtration belt runs endlessly and circulates, it is suitable to be made of a flexible rubber material, and the filtration chamber formed on the surface of this filtration belt also circulates. It is suitable for circling when it is formed in a slit shape across the filtration belt so that it sometimes bends smoothly.

Further, since the liner for covering the upper surface of the vacuum suction box is in sliding contact with the back surface of the filtration belt when double acting, for example, a material having a good sealing property and a small frictional resistance, such as Teflon, is suitable. In addition, in order to reduce the frictional resistance, it is effective to provide a long hole along the sliding contact surface to reduce the sliding contact area.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic side view of a horizontal vacuum belt filter according to the present invention. In the figure, reference numeral 1 is an endless filtration belt which is horizontally laid, and a large number of filtrations are provided on the surface thereof. A chamber 7 is formed (see Figures 3 and 4). Reference numeral 2 is an endless filter cloth that is wound around the outside of the filtration belt 1, and its horizontal running portion covers the upper surface of the filtration belt 1 and runs in synchronization with the filtration belt 1. That is, the filter belt 1 is attached to the filter belt 1 and driven by the drive wheels 3 of the filter belt 1. Reference numeral 4 is a supply box for the raw stock solution. Reference numeral 5 denotes a vacuum suction box, which communicates with the filtration chamber 7 of the filtration belt 1, is adsorbed on the back surface of the filtration belt 1 and moves forward in synchronization with the filtration belt 1,
When the vacuum suction is released, the filter belt 1 is moved back while slidingly contacting the back surface of the filtration belt 1. Reference numeral 6 is an air cylinder for its operation.

Next, the structures of the filtration chamber 7 and the vacuum suction box 5 will be described with reference to FIGS. FIG. 3 is a plan view of a part of the surface of the filtration belt 1. As shown in FIG. 4, ribs 1a are raised on both sides to form a gutter-shaped cross section, and the gutter-shaped bottom part is traversed by the rib 1a. A large number of concave grooves 1b are provided in the direction. A communication hole 1c for communicating with the vacuum suction box 5 is provided at the bottom of the groove 1b. That is, the filter cloth 2 is attached to the outer periphery of the filtration belt 1 to form the concave groove 1
By covering b with the filter cloth 2, the filtration chamber 7 is formed as shown in FIG.

As shown in FIGS. 5 and 6, the vacuum suction box 5 provided on the lower surface of the above-mentioned filtration belt 1 divides a long channel-shaped material into a plurality of chambers, and the respective suction chambers 5 are separated.
A vacuum suction port 5b is provided on the side wall of a, the bottom portion is closed by a bottom plate 5c, and a window 5d serving as a communication hole is provided on the upper surface thereof. On this window 5d, a long liner 8 made of a synthetic resin material having a large number of long holes 8a as shown in FIG.
Is attached. The long hole 8a communicates with the communication hole 1c of the filtration chamber 7 provided in the filtration belt 1 when the vacuum suction box 5 is attached to the filtration belt 1. The liner 8 is made of a material having a small frictional resistance such as a synthetic resin material, and the liner 8 communicates with the elongated hole 8a to reduce the contact area with the filtration belt 1.

Although not shown, the suction hole 5b of the vacuum suction box 5 is connected to a vacuum pump,
When the vacuum suction box 5 returns, the vacuum suction is released. Then, although the filter cloth 2 and the filtration belt 1 are running when the vacuum suction box 5 is returned,
The returning stroke s is about the length of one vacuum suction box 5 as shown in FIG. 1 and is extremely short, and the stock solution on the filter cloth 2 is the horizontal traveling part of the filter cloth 2. It is designed to be inhaled for a long time while it is located at.

The horizontal vacuum belt filter according to the present invention is constructed as described above, and the undiluted solution supplied from the supply box 4 onto the filter cloth 2 is conveyed by the filtration belt 1 in the horizontal traveling portion of the filter cloth 2. While being sucked, the liquid is separated by vacuum suction, and the solid can be taken out of the system at the portion where the filter cloth 2 is separated from the filtration belt 1.

On the other hand, the vacuum suction box 5 sucks the inside of the filtration chamber 7 to separate the liquid content of the stock solution on the filter cloth 2 while moving forward in synchronization with the filter cloth 2 and the filtration belt 1. It is discharged from the vacuum suction port 5b to the outside of the system. When the vacuum suction box 5 reaches the end of the forward movement, the vacuum suction is cut off and the vacuum suction box 5 returns to the suction start position. The reciprocating operation of the vacuum suction box 5 is determined according to the traveling speed of the filtration belt 1, and the traveling speed of the filtration belt 1 is determined by the properties of the stock solution and the like.

In the filtration and separation operation of the stock solution as described above, in the present invention, since the filter cloth 2 is driven by the same drive wheel 3 so as to run in synchronization with the filtration belt 1, a strong tension is applied to the filter cloth 2 itself. Instead, various strength and weakness filter cloths can be selected and used according to the properties of the stock solution to be filtered, and various stock solutions can be solid-liquid separated only by replacing the filter cloth 2. In addition, since the vacuum suction box 5 moves forward in synchronization with the filtration belt 1 during vacuum suction, the filtration belt 1 does not exert a braking action and does not require a strong driving force, and the filtration belt 1 also needs strength. Without it, the filtration belt 1 can be constructed at low cost.

Further, since the filtration belt 1 is an endless filtration band, the vacuum sealing surface of the filtration chamber 7 is only the communicating portion of the vacuum suction box 5 and the conventional filtration chamber (filtration box).
It is possible to maintain a high degree of vacuum by significantly reducing the sealing portion as compared with an endlessly connected and orbiting. That is, during vacuum suction, since the communication seal portion between the filtration belt 1 and the vacuum suction box 5 does not move relative to each other, a complete seal is possible.

Further, the filtration chamber 7 is integrally formed on the filtration belt 1, and unlike the conventional box-shaped filtration chamber, it can be easily constructed without the need for a lateral sealing wall in the traveling direction. At the same time, the orbiting / turning portion can smoothly turn to reduce the driving power. In particular, when the filtration chamber 7 is formed in a groove shape that traverses the filtration belt 1 as shown in the drawing, it is possible to smoothly rotate the filtration chamber 1.

Further, in the present invention, the filtration belt 1 and the vacuum suction box 5 are detached, but if a liner 8 made of a synthetic resin material such as Teflon is used in this detached portion as shown in the figure, the sealing property is improved. In addition to being favorable, the back surface of the filtration belt 1 can be smoothly slid when returning. If a long hole 8a is provided in the operating direction of the liner 8 as shown in the figure,
The contact area with the filtration belt 1 can be reduced, and the communication hole 1c of the filtration chamber 7 to the vacuum suction box 5 can be prevented from being closed if the filtration belt 1 meanders. Of course, the horizontal vacuum belt filter according to the present invention can be used for washing and filtering ore slurry or the like.

[0018]

As described above, the vacuum belt filter according to the present invention has a low driving resistance, can use various filter cloths, can process various stock solutions, and can also vacuum seal. Since the number of parts is small, a high degree of vacuum can be maintained, and a highly efficient stock solution can be processed.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view taken along the line XX of FIG.

FIG. 3 is a plan view of a part of the filtration belt of the horizontal vacuum belt filter according to the present invention.

FIG. 4 is a sectional view taken along line XX of FIG.

FIG. 5 is likewise a plan view of the vacuum suction box.

FIG. 6 is also a cross-sectional view of the vacuum suction box shown in FIG.
3 is a cross-sectional view taken along line XX of FIG.

FIG. 7 is a plan view of a liner that covers the upper surface of the vacuum suction box and a part of the liner is omitted.

FIG. 8 is likewise a vertical side view of the end of the liner of FIG.

[Explanation of symbols]

1 filtration belt 1b groove 1c communication hole 2 filter cloth 5 vacuum suction box 7 filtration room 8 liner 8a long hole

Continuation of the front page (56) Reference JP-A-1-210009 (JP, A) JP-A-60-33900 (JP, A) JP-A-61-133109 (JP, A) Jitsukaihei 3-123506 (JP , U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 33/04

Claims (2)

(57) [Claims] 1. A flexible rubber material in which an endless filter cloth 2 is rotatably hung between a large number of rolls, and a filtration chamber 7 is formed on the inner surface of the filter cloth 2. The filter belt 1 is rotatably wound around, and the filter cloth 2 and the filter belt 1 are joined at their horizontal running portions so as to run in synchronism with each other. A vacuum suction box 5 which communicates with the filtration chamber 7 of the filtration belt 1 and which is in close contact with the filtration belt 1 and is capable of reciprocating along the traveling direction is provided below the filtration belt 1.
A filtration chamber 7 formed on the surface of the filter traverses the filtration belt 1.
It is composed of a large number of grooves 1b, and the bottom of the grooves 1b
The communication hole 1c to the vacuum suction box 5 is opened in the
The empty suction box 5 connects a number of boxes with the top open
The upper opening is the length provided in the running direction of the filtration belt 1.
It is characterized in that it is covered with a liner 8 having holes 8a.
Horizontal vacuum belt filter for. 2. The upper opening of the vacuum suction box 5 is covered.
The liner 8 for covering is made of a synthetic resin material.
Horizontal vacuum belt filter described in.