JP2707170B2 - Horizontal vacuum filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the chemical industry, food industry,
Filtration of materials (slurries) used in the mining metallurgy industry, the inorganic chemical industry, the waste treatment industry, etc. and containing solids in the solution, in particular, having a coarse particle size, that is
The invention relates to a horizontal vacuum filter for filtering mainly aqueous solution-based slurries having particles between 000μ and washing the cake.

[0002]

2. Description of the Related Art Heretofore, as this type of horizontal vacuum filter, there have been known a type in which vacuum suction of a vacuum box is continuously maintained and a type in which vacuum suction and opening to the atmosphere are intermittently repeated by a valve or the like. Have been. Among these, (a) a filter that drives a filter cloth by bringing an endless rubber belt into contact with a vacuum box to synchronize with the rubber belt and (b) connecting and circulating a plurality of vacuum boxes There is a filter that makes Also, the latter intermittent vacuum suction is described in (C) JP-B-55-33368.
When the vacuum box moves forward with the filter cloth at the time of vacuum suction and moves to a certain distance, the vacuum box is opened to the atmosphere by switching the valve and quickly returns to the original position.
There is a filter described in Japanese Patent Publication No. -26886 in which a vacuum box is fixed and a vacuum box is alternately switched to a vacuum by switching a valve, and a filter cloth is moved when the vacuum chamber is opened to the atmosphere.

[0003]

Generally, the above (a)
-(C) the filter machine, because the filter cloth moves continuously,
Although the slurry can be supplied uniformly on the filter cloth, there is a problem that the structure becomes complicated and the price increases.

On the other hand, the filter of the above (d) has a relatively simple structure and is inexpensive. However, since the filter cloth moves intermittently and the slurry is supplied from a fixed portion, the filter cloth is inexpensive. In addition to the problem that the cake is not formed uniformly, the dewatering effect and the cleaning effect are deteriorated, the supply and cleaning must be intermittent, and the problems such as the complexity of opening and closing the valve and the life of the valve. there were. In addition, when the filter cloth is moved intermittently, there is a problem that a special mechanism is required so that the filter cloth does not move in the opposite direction. Furthermore, when the filter cloth is washed, the filter cloth moves intermittently, so that if the cleaning water is continuously supplied, there is a problem that the waste of the cleaning water increases.

[0005] In order to solve the problem of the filter of the above (d), the present applicant continuously supplies the slurry onto the filter cloth which moves intermittently, and adds the slurry to the cake formed on the filter cloth. A horizontal vacuum filter (see Japanese Patent Application No. 2-161858) for continuously forming a slurry layer on the filter cloth by spraying the cleaning liquid uniformly and smoothly cleaning the cake layer, and the reverse of the filter cloth. Without the need for anti-rotation mechanism
A horizontal vacuum belt filter (see Japanese Patent Application No. 2-125660) has been proposed in which the filter cloth can always be intermittently moved by a fixed distance.

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the above two inventions,
It is an object of the present invention to provide a horizontal vacuum filter capable of smoothly and reliably synchronizing intermittent movement of an endless filter cloth and reciprocal movement of a processing object supply device and a cleaning device.

[0007]

According to a first aspect of the present invention, an endless filter cloth that moves intermittently is provided on an upper surface of a vacuum box fixed at a predetermined position. At the time of vacuum suction of the vacuum box, the endless filter cloth is stopped to perform solid-liquid separation of an object to be processed such as a slurry on the endless filter cloth, and washing and dehydration are performed. Sometimes, in a horizontal vacuum filter that moves the endless filter cloth by a predetermined distance, the workpiece supply device and the cleaning device can reciprocate above the endless filter cloth according to the intermittent movement distance of the endless filter cloth. A support mechanism for reciprocally supporting the endless filter cloth is provided on the endless filter cloth, and means for reciprocating the workpiece supply device and the cleaning device; and Hand to reciprocate mechanism Bet is one that has been tuned.
According to a second aspect of the present invention, as the mechanism for synchronizing the means for reciprocating the workpiece supply device and the cleaning device and the means for reciprocating the support mechanism, the support mechanism and the workpiece supply apparatus are provided. And a cleaning device are provided with an interlocking mechanism for synchronizing these movements.

[0008]

In the horizontal vacuum filter according to the first aspect of the present invention, the means for reciprocating the workpiece supply device and the cleaning device and the means for reciprocating the support mechanism are operated by means of electricity, fluid pressure or the like. By controlling and synchronizing, the support mechanism in the state engaged with the endless filter cloth is moved to intermittently move the endless filter cloth, and when the endless filter cloth in the state in which the support mechanism is not engaged is stopped, The workpiece supply device and the cleaning device are moved in accordance with the intermittent movement distance of the endless filter cloth. Also,
According to a second aspect of the present invention, the support mechanism engaged with the endless filter cloth is moved by the interlocking mechanism to intermittently move the endless filter cloth, and the support mechanism is not engaged. When the endless filter cloth is stopped, the workpiece supply device and the cleaning device are moved by the interlocking mechanism in accordance with the intermittent movement distance of the endless filter cloth.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In these figures, reference numeral 1 denotes a frame 2
An endless filter cloth stretched over a large number of guide rolls 3 rotatably installed in the apparatus. Below the horizontal portion 1a of the endless filter cloth 1, four vacuum boxes A1 to A4 are provided, and these vacuum boxes A1 to A4 are independently connected to a control valve and a filtrate tank (not shown). Each filtrate tank is connected to a vacuum pump and a filtrate pump. Each of the vacuum boxes A1 to A4 can independently perform a required vacuum pressure and atmosphere release operation. In addition, each vacuum box A1
The endless filter cloth 1 on A4 is divided into a cake forming section, first and second washing sections, and a dewatering section.

Above the horizontal portion 1a of the endless filter cloth 1, a slurry supply device 5 and first and second cleaning devices 6, 7 supported by a moving frame 4 are reciprocally movable in a state of being connected to each other. It is provided in. The moving frame 4 is provided on a supporting member 8 installed on the frame 2 so as to be able to travel along the traveling direction A of the endless filter cloth 1. Further, the slurry supply device 5 supplies the slurry to the cake forming section, and the cleaning devices 6, 7
Supplies a second washing filtrate (a recovered liquid that has passed through the second washing section) and a fresh washing liquid (for example, tap water) to the first and second washing sections, respectively.

A pair of holding members 10 and 11 longer than the width of the endless filter cloth 1 are provided below the frame 2 in a direction perpendicular to the running direction A of the endless filter cloth 1.
Are provided above and below in a state of being sandwiched therebetween. The holding cylinders 12 are attached to both sides of the upper holding member 10, respectively, and the piston rods 13 of these holding cylinders 12 are connected to the lower holding member 11 through the holding members 10, 11. Have been. This allows
When the holding cylinder 12 is operated, the holding member 11 approaches and separates from the holding member 10, and the holding members 10,
The endless filter cloth 1 is engaged and disengaged between 11. Further, both sides of the upper holding member 10 are connected to a traveling vehicle 14, and the traveling vehicle 14 is mounted on a supporting member 15 fixed to the frame 2 movably along the traveling direction of the endless filter cloth 1. Is placed. One end (the left end in FIGS. 1 and 2) of a piston rod 17 of a movable cylinder 16 suspended from the frame 2 is connected to a central portion in the length direction of the holding member 10. Further, a cleaning pipe 18 is connected to the other end (the right end in FIGS. 1 and 2) of the piston rod 17 of the moving cylinder 16. A cleaning nozzle 19 for performing the cleaning of No. 1 is provided so as to be surrounded by a cover 20 for preventing scattering of cleaning water. Further, a connecting member 21 for connecting the traveling vehicle 14 and the moving frame 4 to each other is provided. Then, both holding members 1 are held by the holding cylinder 12.
When the piston rod 17 of the moving cylinder 16 is rapidly moved in the direction of arrow B in FIG. 2 while the endless filter cloth 1 is sandwiched between 0 and 11, the endless filter cloth 1 moves rapidly in the direction of arrow A, The cleaning nozzle 19 connected to the other end of the piston rod 17 also moves in the same manner, while the connecting member 21 moves rapidly in the direction of arrow B together with the slurry supply device 5 and the first and second cleaning devices 6, 7. It is supposed to. When the holding state of the endless filter cloth 1 by the holding members 10 and 11 is released by the holding cylinder 12 and the piston rod 17 of the movable cylinder 16 is moved in the direction of arrow C in FIG. In the stopped state, the cleaning nozzle 19 and the connecting member 21 (the slurry supply device 5, the first and second cleaning devices 6, 7) move in the direction indicated by the arrow C.
It moves in the direction.

When performing vacuum filtration using the horizontal vacuum filter configured as described above, first, each vacuum box A
After suspending the vacuum suction to 1 to A4, the holding cylinder 12
The piston rod 13 is retracted, the holding member 11 at the position indicated by the two-dot chain line in FIG. 2 is lifted toward the holding member 10, and the endless filter cloth 1 is sandwiched between the holding members 10, 11. The 16 piston rods 17 are rapidly moved in the direction of arrow B. As a result, the endless filter cloth 1 sandwiched between the sandwiching members 10 and 11 moves by the moving distance of the piston rod 17 of the moving cylinder 16 in the direction of arrow A, and the slurry supply device 5 is connected via the connecting member 21. , The first and second cleaning devices 6 and 7, the cleaning pipe 18 for cleaning the endless filter cloth 1, and the cleaning nozzle 19, respectively,
In FIG. 1 and FIG. 2, it moves leftward by a predetermined distance. Next, the vacuum suction of each of the vacuum boxes A1 to A4 is started, and the holding member 11 is lowered by the holding cylinder 12 and separated from the holding member 10, so that the endless filter sandwiched between the holding members 10, 11 is provided. After the holding state of the cloth 1 is released, the piston rod 17 of the moving cylinder 16 is
Is moved in the direction of arrow C in FIG. As a result,
The holding members 10 and 11 return to the original positions indicated by the two-dot chain lines, and the slurry supply device 5, the first and second cleaning devices 6 and 7, and the endless filter cloth 1 The cleaning pipe 18 and the cleaning nozzle 19 are respectively shown in FIG.
2 and return to the right by a predetermined distance.

By repeating the operations of the holding cylinder 12 and the moving cylinder 16 in this manner, the endless filter cloth 1 is moved in a certain direction (the direction of arrow A in FIGS. 1 and 2).
Is moved intermittently. At this time, the slurry is uniformly supplied to the cake forming section on the vacuum box A1 by the slurry supply device 5, and the first and second cleaning devices on the vacuum boxes A2 and A3 are first and second washed by the cleaning devices 6 and 7, respectively. The second washing filtrate and the fresh washing solution are evenly sprayed on the two washing sections, respectively, and the cake layers formed in the first and second washing sections are washed, while the endless filter cloth 1 is washed by the washing nozzle 19. Is supplied with washing water to wash the endless filter cloth 1. In the dehydration section, dehydration and drying are performed by vacuum suction of the washed cake layer.

As described above, the endless filter cloth 1 is intermittently moved by the predetermined distance by the holding cylinder 12 and the moving cylinder 16, and the slurry is supplied onto the endless filter cloth 1 by the slurry supply device 5 to form a vacuum. After the cake layer is formed by suction, the second washing filtrate and the washing liquid are supplied to the cake layer by the first and second washing devices 6 and 7, and the cake layer is washed by vacuum suction. Further, the cake layer is dehydrated and dried by vacuum suction, and is peeled off and collected from the endless filter cloth 1 by a scraper (not shown).

In the above embodiment, the means for reciprocating the slurry supply device 5 and the first and second cleaning devices 6, 7 and the support mechanism for intermittently moving the endless filter cloth 1 (holding members 10, 10) are provided. 11 and the means for reciprocating the holding cylinder 12) have been described in a configuration in which the moving cylinder 16 and the connecting member 21 are linked to each other, but the present invention is not limited to this. And the cleaning nozzle 19 are reciprocated, and the slurry supply device 5 and the first and second cleaning devices 6
As means for reciprocating 7, another moving cylinder may be horizontally disposed above the endless filter cloth 1, and the two moving cylinders may be controlled and synchronized by electric, fluid pressure or the like.

[0017]

As described above, according to the first aspect of the present invention,
Is provided with an endless filter cloth that moves intermittently on the upper surface of a vacuum box fixed at a predetermined position, stops the endless filter cloth at the time of vacuum suction of the vacuum box, and sets a slurry or the like on the endless filter cloth. While the solid-liquid separation of the object to be processed is performed, washing and dehydration are performed, while the vacuum suction of the vacuum box is stopped, the horizontal endless filter cloth is moved by a predetermined distance in a horizontal vacuum filter, and the endless filter cloth is removed. A workpiece supply device and a cleaning device are provided reciprocally movable upward in accordance with the intermittent movement distance of the endless filter cloth, and a support mechanism for detachably supporting the endless filter cloth on the endless filter cloth. Are provided so as to be reciprocally movable, and the means for reciprocating the workpiece supply device and the cleaning device and the means for reciprocating the support mechanism are synchronized with each other. Reciprocating cleaning equipment The means for moving the support mechanism and the means for reciprocating the support mechanism are controlled and tuned by means of electricity, fluid pressure, etc., so that the support mechanism engaged with the endless filter cloth is moved to intermittently move the endless filter cloth. When the endless filter cloth is stopped while the support mechanism is not engaged, the workpiece supply device and the cleaning device are moved in accordance with the intermittent movement distance of the endless filter cloth. In addition, a uniform product can be obtained by obtaining a cleaning effect, and the intermittent movement of the endless filter cloth and the reciprocating movement of the workpiece supply device and the cleaning device can be smoothly and reliably synchronized.

The second aspect of the present invention provides a mechanism for synchronizing the means for reciprocating the workpiece supply device and the cleaning device and the means for reciprocating the support mechanism, wherein Since the interlocking mechanism for synchronizing the movements of the material supply device and the cleaning device is provided, the support mechanism engaged with the endless filter cloth is moved by the interlocking mechanism to move the endless filter cloth. When the endless filter cloth is stopped in a state where the support mechanism is not engaged, the workpiece supply device and the cleaning device are moved in accordance with the intermittent movement distance of the endless filter cloth by the interlocking mechanism. Accordingly, the intermittent movement of the endless filter cloth and the reciprocating movement of the workpiece supply device and the cleaning device can be performed by synchronizing with one mechanism, and the entire device can be simplified.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of the present invention.

FIG. 2 is a front view showing an interlocking mechanism.

FIG. 3 is a side view showing a support mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endless filter cloth 5 Slurry supply device (substrate supply device) 6 First cleaning device 7 Second cleaning device 10 Holding member (supporting mechanism) 11 Holding member (supporting mechanism) 12 Holding cylinder (supporting mechanism) 16 Moving cylinder ( Interlocking mechanism) 21 Connecting member (interlocking mechanism) A1 Vacuum box A2 Vacuum box A3 Vacuum box A4 Vacuum box

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Yoshihiko Nakazawa, Inventor, 2-17-15 Tsukushima, Chuo-ku, Tokyo Inside Tsukishima Kikai Co., Ltd. (72) Shuji Iwasaki 2-17-15 Tsukushima, Tsukushima, Chuo-ku, Tokyo Inside Machinery Co., Ltd. (72) Inventor Masuhiro Sato 2-17-15 Tsukuda, Chuo-ku, Tokyo Inside Tsukishima Machinery Co., Ltd. (56) References JP-A-4-59005 (JP, A) JP-A-4- 22406 (JP, A) JP-A-62-114616 (JP, A)

Claims (2)

(57) [Claims] 1. An upper surface of a vacuum box fixed at a predetermined position,
An endless filter cloth that moves intermittently is provided, and at the time of vacuum suction of the vacuum box, the endless filter cloth is stopped, and a solid-liquid separation of an object to be processed such as a slurry on the endless filter cloth is performed.
While washing and dewatering, when the vacuum suction of the vacuum box is suspended, in a horizontal vacuum filter that moves the endless filter cloth by a predetermined distance, above the endless filter cloth, the intermittent movement distance of the endless filter cloth is In addition, the workpiece supply device and the cleaning device are provided to be reciprocally movable, and the endless filter cloth is provided with:
A support mechanism for removably supporting the endless filter cloth is provided so as to be reciprocally movable, and means for reciprocating the workpiece supply device and the cleaning device and means for reciprocating the support mechanism are synchronized. A horizontal vacuum filter characterized by the following. 2. An upper surface of a vacuum box fixed at a predetermined position,
An endless filter cloth that moves intermittently is provided, and at the time of vacuum suction of the vacuum box, the endless filter cloth is stopped, and a solid-liquid separation of an object to be processed such as a slurry on the endless filter cloth is performed.
While washing and dewatering, when the vacuum suction of the vacuum box is suspended, in a horizontal vacuum filter that moves the endless filter cloth by a predetermined distance, above the endless filter cloth, the intermittent movement distance of the endless filter cloth is In addition, the workpiece supply device and the cleaning device are provided to be reciprocally movable, and the endless filter cloth is provided with:
A supporting mechanism for removably supporting the endless filter cloth is provided so as to be reciprocally movable, and an interlocking mechanism for synchronizing these movements is provided for the supporting mechanism, the workpiece supply device and the cleaning device. A horizontal vacuum filter characterized by the following.