JPH0724220A - Horizontal-filter plate filter - Google Patents

Abstract

PURPOSE:To provide a device for automatically and continuously clean a long- sized sheet filter cloth discharged from a horizontal-plate filter. CONSTITUTION:This horizontal-plate filter is provided with a cleaner consisting of a cleaning tank 10 provided adjacent the filter cloth 3 delivery side, guide rolls 11 and 12 horizontally furnished respectively on the upper end and lower end in the tank 10, a cleaning header 13 having plural spray nozzles opposed to the filter cloth 3 laid over the guide rolls 11 and 12 and a lifting means for reciprocating the header 13 along the filter cloth 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal filter plate type filter, and more particularly to a horizontal filter plate type filter having a structure integrally provided with a cleaning mechanism.

[0002]

2. Description of the Related Art To remove impurities such as highly viscous liquid, for example, highly sticky polymer liquid which is a raw material for adhesives, filtration is carried out using a filter consisting of a bag-like tubular element made of felt-like filter cloth. is doing. 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. Also because of the shape. That is, when a considerable amount of the undiluted solution is treated and the clogging of the filter cloth increases, the cylindrical element made of the filter cloth is removed from the filter, and the cleaning solution is used for manual cleaning such as scrubbing. 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, horizontal filter plates composed of a filter plate frame and a partition plate are vertically stacked, a sheet-shaped filter cloth is spread between the horizontal filter plates, and then the filter plate frame is pressed in a watertight manner to form a filter cloth. The stock solution is pressure-supplied from the upper filter plate, and the filtrate that has passed through the filter cloth 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 as described above. The filtration operation has been restarted. The used filter cloth is usually discarded.

Since the horizontal filter plate type filter has the above-mentioned structure and functions, it can be seen that even a filter cloth made of felt can be used in the form of a sheet. Since the felt-like filter cloth is expensive, the cost of the filter medium is high and it is not economical without reuse by cleaning. However, in the prior art, no device has been proposed which can wash and regenerate the used long sheet-shaped and felt-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-mentioned problems of the prior art, and it is possible to automatically obtain a long sheet-like filter cloth discharged from a horizontal filter plate type filter. It is another object of the present invention to provide an apparatus for continuously cleaning and regenerating.

[0006]

The gist of the first invention for solving the above-mentioned problems is that horizontal filter plates composed of a filter plate frame and a partition plate are vertically stacked, and a sheet is placed between the filter plates. In a horizontal filter plate type filter machine in which a filter cloth is spread and the filter plate is fastened by a pressure contact means and the stock solution is supplied to the filter plate for filtration.
A cleaning tank provided adjacent to the filter cloth withdrawing side, guide rolls horizontally provided at the upper and lower ends of the cleaning tank, and a spray facing the filter cloth stretched between the guide rolls. A horizontal filter plate type filter characterized by comprising a cleaning header having a plurality of nozzles arranged in parallel and an elevating means for reciprocating the cleaning header along the filter cloth, and The gist of the second invention is that a rewinding roll around which a filter cloth to be supplied to a horizontal filter plate is wound, and a dewatering roll for pressing the filter cloth out of the lower guide roll of the cleaning tank to deliquify it. A take-up roll for winding the filter cloth that exits the dewatering roll is provided on the filter cloth supply side of the frame that supports the filter plate in multiple stages, and the lower guide roll and the dewatering roll of the cleaning tank are provided. A collection pan is placed below the filter cloth Claim 1, characterized in that provided
It is in the horizontal filter plate type filter described.

[0007]

When the filtration plate portion is treated with a considerable amount of the stock solution and the filtration cloth becomes clogged and the filtration operation becomes difficult, the filtration operation is stopped and the washing operation is performed. The horizontal filter plate is opened, and the take-up roll is driven to draw out a new length of filter cloth wound around the rewinding roll by a predetermined length, and the portion used for the filtering operation 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 by a pressure contact means such as a hydraulic cylinder to restart the filtering operation.

On the other hand, in the cleaning tank, the filter cloth used for the filtering operation is vertically stretched between the guide rolls horizontally attached to the upper and lower ends of the cleaning tank.
The tubular cleaning header, in which spray nozzles facing the filter cloth surface are juxtaposed at appropriate intervals, is horizontally supported by lifting means such as chains at the left and right ends of the cleaning header and moves up and down in a vertical plane parallel to the filter cloth surface to reciprocate. To be done. One end of a pressure-resistant hose wound around a rotary reel is connected to one end of the cleaning header to introduce a high-pressure cleaning liquid. The cleaning liquid in the header is
Impurities adhering to the surface of the filter cloth are sprayed from the spray nozzles onto the surface of the filter cloth at a high speed from a slightly obliquely upward direction, and the contaminants are removed by the impact of the cleaning liquid. The washing header is washed back and forth a suitable number of times depending on the degree of contamination of the filter cloth.

When the cleaning with the cleaning liquid is completed and further rinse cleaning is required, the liquid supplied from the pressure-resistant hose can be changed to the rinse liquid and appropriately used. When the washing is completed by the above operation, it is necessary to wash the portion used for the filtering operation in the filter plate portion next time, so the filter plate is opened and the winding roll is driven in the same manner as described above. Move the filter cloth. At this time, the filter cloth after washing is squeezed and deliquified by a dewatering roll provided below the winding roll, and wound around the winding roll. By repeating the above operations, if there is no new filter cloth wound on the rewinding roll, the rewinding roll is driven to rewind the filter cloth wound on the take-up roll, and the filtering operation is repeated. use.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side view of a horizontal filter plate type filter according to the present invention, FIG. 2 is an elevation view taken along line II-II of FIG. 1, and FIG. 3 is I of FIG.
It is an elevation view of II-III view. In the figure, 1 is an upper filter plate,
Reference numeral 2 is a lower filter plate, and a filter cloth 3 wound around a rewinding roll 21 described later is spread between the filter plates, and an upper strong back 4 and a lower strong back 5 which respectively support the filter plate are interposed therebetween. Then, it is fastened by the hydraulic cylinder 6. Reference numeral 7 denotes an undiluted solution inlet provided in the plate frame of the upper filter plate 1, which is connected to a flexible tube (not shown) to supply the undiluted solution. Reference numeral 8 denotes a filtrate outlet provided in the plate frame of the lower filter plate 2 and connected to a filtrate pipe (not shown). Reference numeral 9 denotes a frame on which the above filter plate portion is placed and which is erected on the base plate.

Reference numeral 10 is a thin box-shaped cleaning tank slightly wider than the filter cloth width, and the filter cloth 3 pulled out from the filter plate is turned 90 degrees at the upper end and guided below the cleaning tank 10. The upper guide roll 11 is horizontally attached. Reference numeral 12 denotes a lower guide roll that is horizontally attached to the lower end of the cleaning tank 10 and guides the filter cloth 3 exiting the cleaning tank 10 to a dewatering roll 25, which will be described later.

Reference numeral 13 is a spray nozzle 1 facing the filter cloth 3.
This is a cleaning header in which an appropriate number of 4 are arranged side by side, and is supported horizontally and vertically by guides 15, 15 fitted on both left and right ends thereof. 16A and 16B are a pair of guide rails having an L-shaped cross section, which are attached to the left and right side plates of the cleaning tank in the vertical direction. The guide rails 16A and 16B are fitted into grooves 15A formed in the vertical end surface of the guide 15, The guide 15 is movable up and down. Reference numerals 17 and 17 denote drive chains whose both ends are connected to the upper and lower ends of the guides 15 and 15, respectively, and drive sprockets 18 and 18 provided at the top of the cleaning tank 10 and driven sprockets 19 and 19 provided at the bottom thereof. And is rotated by the speed reducer 20.

Reference numeral 21 denotes a rewinding roll which is horizontally installed via frames and the like on frames 22A and 22B attached to the side surface of the frame 9 on the filter cloth insertion side of the filter plate portion. Is guided to the filter cloth insertion end of the filter plate by the guide roll 23. Two
Reference numeral 4 denotes a take-up roll that is horizontally mounted on the frames 22A and 22B via bearings and the like like the rewinding roll 21.
The filter cloth after being discharged from the lower guide roll 12 of No. 0 is passed through the dewatering roll 25, which is a pair of pressure contact rolls which is placed below the take-up roll 24, and is wound up.

Numerals 26, 26 are scroll chucks fitted to one end of each of the rewinding roll 21 and the winding roll 24, whereby both rolls can be freely attached and detached.
Reference numerals 27 and 27 denote air clutches attached to the shaft ends of the rewinding roll 21 and the winding roll 24, respectively, whereby connection with the speed reducers 28 and 28 becomes optional.

Numeral 30 is a hose reel for a pressure-resistant hose 32 which is rotatably attached to an arm 31 which is erected on the top of the cleaning tank 10. With this, cleaning liquid can be supplied without any trouble even if the cleaning header moves up and down. Can be supplied. Reference numeral 33 denotes a liquid collecting pan that collects the falling cleaning liquid from the filter cloth 3 that is hooked between the lower guide roll 12 and the dewatering roll 25 and introduces it into the lower part of the cleaning tank 10. The sprayed cleaning liquid is the cleaning liquid outlet 34 provided at the bottom of the cleaning tank.
Is discharged from the aircraft. Reference numeral 36 is an inspection hole provided on the outer side plate of the cleaning tank 10 for internal inspection.

Next, the operation of the embodiment having the above construction will be described. Contaminants such as solids are removed from the undiluted solution supplied from the undiluted solution inlet 7 by the filter cloth 3 in the filter plate, and a clean filtrate is discharged from the filtrate outlet 8 to the outside of the apparatus. When a considerable amount of the stock solution is processed and the filtering operation becomes difficult due to clogging of the filter cloth, the filter plates 1 and 2 are opened by the hydraulic cylinder 6 and the speed reducer 28 is driven to drive the take-up roll 2
4 is rotated to spread a new filter cloth wound around the rewinding roll 21 on the filter plate. After this, hydraulic cylinder 6
The filter plate is closed by and the filtration operation is restarted.

On the other hand, the used filter cloth introduced into the cleaning tank 10 and stretched between the upper guide roll 11 and the lower guide roll 12 is introduced from the cleaning liquid inlet 35 and cleaned via the pressure-resistant hose 32. Spray nozzle 1 for header 13
It is cleaned by the high-pressure cleaning liquid sprayed from No. 4. At this time, the cleaning header 13 is moved up and down in parallel with the filter cloth surface at an appropriate speed by the drive chain 17 which is rotated by the rotation of the drive sprocket 18, and reciprocates in the cleaning tank to uniformly clean the filter cloth.

The washed filter cloth is deliquored by the deliquoring roll 25 when the filter cloth is moved to the next open frame of the filter plate, and is wound around the take-up roll 24. As described above, the rewinding roll 21
If the filter cloth of No. 1 is lost due to repeated filtration and washing, the speed reducer 28 rotates the rewinding roll 21 to rewind the washed filter cloth wound around the take-up roll 24 and reuse it in the filtering operation. To do.

In the above embodiments, the filter plate has one stage, but it is also possible to provide the filter plate in multiple stages by providing an intermediate winding roll between the filter plate section and the washing tank. Further, by changing the positions of the filter cloth and the spray nozzle 14 in the cleaning tank, it is possible to inject the cleaning liquid from the direction opposite to that of this embodiment. Furthermore, it is possible to set the direction in which the filter cloth is stretched in the cleaning tank not in the vertical direction but in an oblique direction, for example.

[0020]

EFFECTS OF THE INVENTION According to the present invention having the above-mentioned structure and action, the filter cloth used for the filtration operation can be continuously and automatically washed and reused, so that the labor for cleaning the filter cloth can be saved. The effect is that the labor can be greatly saved and the cost of the filter medium can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a horizontal filter plate type filter of the present invention.

2 is an elevation view taken along line II-II of FIG.

3 is an elevation view taken along line III-III of FIG.

[Explanation of symbols]

1; upper filter plate, 2; lower filter plate, 3; filter cloth, 4; upper strong back, 5; lower strong back, 6; hydraulic cylinder, 7; stock solution inlet, 8; filtrate outlet, 9; frame, 1
0; cleaning tank, 11; upper guide roll, 12; lower guide roll, 13; cleaning header, 14; spray nozzle, 15; guide, 16; guide rail, 17; drive chain, 18; drive sprocket, 19; driven sprocket , 20; reducer, 21; rewind roll, 22; frame, 23; guide roll, 24; take-up roll, 2
5: liquid removal roll, 26; scroll chuck, 27; air clutch, 28; speed reducer, 30; hose reel, 3
1; Arm, 32; Pressure-resistant hose, 33; Collection pan, 3
4; cleaning liquid outlet, 35; cleaning liquid inlet, 36; inspection hole.

Claims (2)

[Claims] 1. A horizontal filter plate composed of a filter plate frame and a partition plate is vertically stacked, a sheet-shaped filter cloth is spread between the filter plates, and the filter plates are fastened by a pressure contact means to form a stock solution on the filter plate. In a horizontal filter plate type filter for supplying and filtering, a washing tank provided adjacent to the pulling side of the filter cloth, guide rolls horizontally provided at the upper end and the lower end in the washing tank, and the guide. A cleaning device is provided, which comprises a cleaning header in which a plurality of spray nozzles are arranged in parallel to each other and which face the filter cloth stretched between rolls, and elevating means for reciprocating the cleaning header along the filter cloth. A horizontal filter plate type filter characterized by. 2. A rewinding roll around which a filter cloth supplied to a horizontal filter plate is wound, a dewatering roll for pressing and dewatering a filter cloth coming out of a lower guide roll of a cleaning tank, and exiting the dewatering roll. A take-up roll for winding the filter cloth is provided on the filter cloth supply side of the frame supporting the filter plate in a multi-stage manner, and the filter is hung on the lower guide roll and the dewatering roll of the cleaning tank. The horizontal filter plate type filter according to claim 1, wherein a liquid collecting pan is provided below the cloth.