JPH06134228A - Cleaning device for filter cloth - Google Patents

Abstract

PURPOSE:To clean a felt-like filter cloth of continuous sheet shape automatically and continuously and regenerate the same by opening a horizontal filter plate, driving a drawing roll, drawing out the filter cloth by a given length and guiding a section after use into a cleaning tank. CONSTITUTION:In a horizontal filter plate type filter, a filter cloth after use is guided into a cleaning tank by the rotation of a drawing roll 8. As the both ends of the filter cloth in the cleaning tank are fixed to a filter section by a rolling section, swing rolls 3A and 3B are displaced up and down when a swing arm 2 is rocked by the action of a driving cylinder 4, and the filter cloth is moved reciprocatingly in a squeezing roll group 6 and cleaned. After that, the drawing roll 8 is rotated to draw out the filter cloth, and further clear cleaning liquid is jetted out of both faces of the filter cloth to carry out the finish cleaning. The filter cloth is dehydrated by a pressure welding roll 9 and taken up on a take-up roll 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter cloth cleaning device.

[0002]

2. Description of the Related Art To remove contaminants such as highly viscous liquids, such as highly sticky polymer liquid which is a raw material for adhesives, a filter comprising a bag-shaped tubular element made of felt-like filter cloth is used. Filtered. This is because felt-like filter cloths are suitable for the filtration of liquids having the above-mentioned properties, and these felt-like filter cloths are also expensive, so they are suitable for washing and repeated use. This is because of the shape. That is, when a considerable amount of the stock solution is treated and the clogging increases, the cylindrical element made of the filter cloth is removed from the filter,
It is regenerated by the following washing method and repeatedly used for filtration. That is, after the cleaning agent is sprayed under high pressure on the removed cylindrical element to perform rough cleaning, finish cleaning is performed by hand such as scrubbing by hand. For this reason, it takes a lot of labor and time to wash the bag-shaped tubular element.

By the way, as a filter used by pressurizing the stock solution to increase the filtration pressure, there is a horizontal filter plate type filter. The horizontal filter plate type filter is known, for example, as disclosed by the applicant in Japanese Patent Publication No. 1-56810 and Japanese Patent Publication No. 2-61286. In this filter, sheet-shaped filter cloths are spread between horizontally stacked horizontal filter plates, and then the filter frame is pressed in a watertight manner to pressurize and supply the undiluted solution from the upper filter plate and pass through the filter cloth. The obtained filtrate is taken out from the lower filter plate. Then, when a considerable amount of the stock solution is treated and the clogging of the filter cloth increases, the upper and lower filter plates are opened to draw out the filter cloth, and a new filter cloth is spread on the filter plate, and The filtration operation is restarted. The used filter cloth is usually discarded.

Since the horizontal filter plate type filter has the above-mentioned structure and function, even a felt-shaped filter cloth can be used as long as it is a long sheet. Since the felt-like filter cloth is expensive as described above, it is uneconomical because the operation cost is high without reuse by washing. However, as a matter of fact, the prior art has not proposed a device that can wash and regenerate a used long sheet-shaped filter cloth discharged from the horizontal filter plate type filter.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and is a long sheet-like felt-like filter cloth discharged from a horizontal filter plate type filter or the like. It is an object of the present invention to provide a device for automatically and continuously cleaning and regenerating.

[0006]

The gist of the present invention for solving the above-mentioned problems is to provide a pair of left and right swing arms swingably supported by a horizontal shaft provided in a lower portion of a cleaning tank. Two swing rolls rotatably attached to both ends of the swing arm in parallel with the horizontal axis, and driving means for connecting the one end of the swing arm to swing the swing arm up and down. A squeezing roll arranged between the two swing rolls in parallel with the swing roll to squeeze the filter cloth, a drawing roll arranged in the upper space of the cleaning tank and rotated by a driving machine,
An inlet guide roll and an outlet guide roll are respectively provided at the inlet and outlet of the filter cloth of the cleaning tank, and the filter cloth after being used in the filter is an inlet guide roll, a swing roll, a squeezing roll, a swing roll, a withdrawal roll, and The filter cloth cleaning device is characterized in that the filter cloth is cleaned while the outlet guide rolls are wound in this order to swing the swinging roll.

[0007]

The filter cloth used for the filtering operation in the horizontal filter plate type filter is transferred to the cleaning operation when backwashing is required due to clogging. The horizontal filter plate is opened, the drawing roll is driven to draw out the filter cloth for a predetermined length, and the portion used for filtration is introduced into the washing tank. By this operation, a new filter cloth is spread on the horizontal filter plate, so that the filter plate is closed and the filtering operation is restarted.

In the cleaning tank, an air cylinder which is a driving means of the swing arm is operated to swing the swing arm vertically at a slow speed. At this time, since the filter cloth is fixed by the filter plate of the filter and the take-up roll which will be described later, the swinging of the swing arm causes the swing roll to move up and down, and the filter cloth reciprocates in the squeezing roll group. To do. At this time, the filter cloth is moved by a predetermined length due to the displacement of the swing roll. However, if the moving amount is multiplied by the number of sets of the squeezing rolls, for example, 3 times in the case of this embodiment, the length of the filter cloth that can be washed becomes the total length. Therefore, the displacement amount of the swing roll and the number of sets of the squeezing rolls are determined so that this total length becomes the length of the horizontal filter plate.
The filter cloth is passed through the cleaning solution, and then the cleaning solution is squeezed by a squeezing roll, whereby the contaminants in the filter cloth are washed out into the cleaning solution. When the filter cloth, which has been cleaned, passes through the drawing roll, the cleaning liquid is drained and wound on a winding roll for reuse.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of the filter cloth cleaning device, and FIG. 2 is a plan view taken along line II-II of FIG. In the figure, 1 is a rectangular parallelepiped cleaning tank, and the cleaning liquid is filled up to the liquid level L shown. 2 is a horizontal shaft 2A that is swingably attached to the bottom of the cleaning tank 1.
A pair of left and right swing arms that are pivotally supported by the swing rolls 3A, 3 of approximately the same length as the width of the filter cloth.
B is rotatably mounted in parallel. 4 is a drive cylinder vertically supported on the upper frame of the cleaning tank 1,
The upper end of the drive bar 5 is connected to the piston rod,
The lower end of the drive bar 5 is connected to one end of the swing arm 2.

6, 6 and 6 are two swing rolls (3
A, 3B) is a group of squeezing rolls having a length equal to that of the filter cloth, which is arranged in parallel with the swinging roll, and has a small diameter roll 6A formed by coating the surface of the metal circular tube with a thick soft rubber layer.
And a roll 6 of a large-diameter metal tube that makes a pair and presses against it
Both rolls 6A and 6B are rotatably attached to the bearings provided on the side walls of the cleaning tank at the left and right ends thereof, respectively.

Reference numeral 8 denotes a drawer roll that is horizontally supported at the left and right ends in the uppermost space of the cleaning tank, and is slowly rotated via a belt 11 by an electric motor 10 provided on the ceiling of the cleaning tank. . Then, the filter cloth is pulled out in cooperation with the pressure contact roll 9 urged by the spring 7 and the like, and the cleaning liquid remaining in the filter cloth is drained. Reference numeral 12 is an inlet guide roll provided at the inlet of the filter cloth of the cleaning tank, and 13 is an outlet guide roll provided at the outlet of the filter cloth of the cleaning tank. Denoted at 15 and 15 are spray nozzles for cleaning the filter cloth, which has been cleaned by the squeezing roll 6 in the cleaning solution, by high-pressure spraying the cleaning solution from both sides of the filter cloth. Nozzles are installed side by side. Reference numeral 14 denotes a roll that winds up the filter cloth that has been washed and drained, and is driven by an air motor so as not to cause a winding difference with the drawing roll.

Next, the operation of the embodiment having the above configuration will be described. The filter cloth after being used in the horizontal filter plate type filter is introduced into the washing tank by the rotation of the drawing roll 8. Since both ends of the filter cloth in the cleaning tank are fixed by the filter plate portion of the filter and the drawer roll portion, the swing cylinders 3A and 3B can be swung by swinging the swing arm 2 by the operation of the drive cylinder 4. It is displaced up and down, and the filter cloth is a squeezing roll group 6,
Reciprocates in 6 and 6. At this time, the filter cloth is cleaned by the cleaning liquid flowing in and out of the filter cloth. When the washing with the swing roll 3 is completed, the pull-out roll 8 is rotated to pull out the filter cloth, and a clear cleaning liquid is further sprayed from both sides of the filter cloth for finish cleaning. When passing through the drawer roll 8,
The filter cloth is squeezed by the pressing roller 9 to be deliquored, and is wound around the winding roller 14 to be reused for the filtering operation.

In this embodiment, an example of a horizontal filter plate type filter is shown as the filter, but the filter cloth cleaning apparatus of the present invention can be applied to other types of filters. Further, the squeeze roll of the present invention has a cylindrical shape with a smooth surface, but depending on the properties of the filter cloth, it is also an effective method to bend the filter cloth by making the cross section of the two squeeze rolls 6A and 6B into a gear shape. is there.

[0014]

According to the present invention having the above-described structure and operation, the sheet-shaped filter cloth can be automatically and continuously washed, so that the labor of cleaning the filter cloth can be reduced and the high-viscosity liquid The effect that the filtering operation can be automatically performed is obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a filter cloth cleaning device.

FIG. 2 is a plan view taken along line II-II of FIG.

[Explanation of symbols]

1; Washing tank, 2; Swing arm, 2A; Horizontal axis,
3; Swing roll, 4; Drive cylinder, 5; Drive bar, 6; Drawing roll, 7; Spring, 8; Draw roll, 9; Press roll, 10; Electric motor, 11; Belt, 1
2; entrance guide roll, 13; exit guide roll, 1
4; take-up roll, 15; jet nozzle.

Claims (1)

[Claims] 1. A pair of left and right swing arms swingably supported by a horizontal shaft provided in a lower portion in a cleaning tank, and rotatably attached to both ends of the swing arms in parallel with the horizontal shaft. Two swing rolls, driving means for connecting the one end of the swing arm to swing the swing arm up and down, and squeezing the filter cloth between the two swing rolls in parallel with the swing roll. A squeezing roll, a drawing roll arranged in the upper space of the cleaning tank and rotated by a driving machine, and an inlet guide roll and an outlet guide roll respectively arranged at the inlet and outlet of the filter cloth of the cleaning tank, After the filter cloth has been used in the filter machine, it is swung around the inlet guide roll, swing roll, squeeze roll, swing roll, drawer roll, and outlet guide roll in this order. Filter cloth cleaning device which is characterized by washing the filter cloth while swinging a.