JP6562219B2 - Filter press filter cloth cleaning device - Google Patents

Description

The present invention relates to filter cloth cleaning of a filter press, and provides a filter press cleaning apparatus for a filter press that does not require a cleaning hose for supplying a cleaning liquid.

Conventionally, a filter press filter cloth cleaning device in which filter cloths are stretched before and after the filter plate has a cleaning tube integrated with the filter plate at the top of the filter plate and is parallel to the side of the filter plate. Patent Document 1 discloses a technique for supplying cleaning water to a cleaning pipe by connecting the main supply pipe and the cleaning pipe with a flexible pipe. Since the cleaning pipe moves as the filter plate opens and closes, the main supply pipe and the cleaning pipe are connected with a flexible pipe.

JP-A-10-99607

In the cleaning device of Patent Document 1, the flexible tube requires a length corresponding to the movement of the filter plate, so that in the case of a large filter press, it becomes a long flexible tube. Therefore, the use of a flexible tube causes problems such as a reduction in the maintenance space above the dehydrator and an increase in the number of parts due to the use of the flexible tube.

Large filter presses require a stand that supports the middle of the frame, and since the flexible tube interferes with the stand when the filter plate is opened and closed, an opening / closing device is provided at both ends of the filter press to move the filter plate toward the center. It was.

A large number of filter plates can be opened and closed in parallel with the guide rails supported between the frames, a support bar with a filter cloth suspended from the vibration shaft provided along the guide rails is bridged, and the vibration is caused by the vibration of the vibration shaft. In the filter cloth cleaning device of the filter press that peels the dehydrated cake attached to the cleaning liquid, a cleaning liquid supply path provided on the vibration shaft, and a cleaning nozzle provided on the vibration shaft that jets the cleaning liquid from the supply path toward the filter cloth; With this, there is no need to provide a cleaning pipe, and the number of consumable parts for the dehydrator can be reduced.

By providing the supply path in a hollow vibration shaft, it becomes a compact filter press, and a maintenance space can be secured.

The cleaning nozzle is arranged between the opened filter plates and is provided at the top of the vibration shaft, so that all the filter cloths can be cleaned simultaneously, and the cleaning liquid remaining in the supply path does not leak from the cleaning nozzle. .

Because the vibration shaft has the functions of a vibration device and a cleaning device, it is necessary to provide a main supply pipe that supplies cleaning water, which has been required in the past, and a flexible pipe that connects the main supply pipe to the cleaning pipe provided on the filter plate Is gone. Accordingly, the number of parts and consumables of the dehydrator can be reduced, and a maintenance space can be secured with a compact filter press.

In addition, a large filter press eliminates the need for a flexible tube that interferes with the stand that supports the middle, so there is no need to provide an opening / closing device at both ends of the filter press, and an opening / closing device is provided on one side of the filter plate. Can be opened and closed.

It is a side view of the filter press using the filter cloth washing | cleaning apparatus which concerns on this invention. It is a principal part front view of the filter board assembly and filter cloth washing | cleaning apparatus which concern on this invention. It is a front view of the filter cloth concerning the present invention. It is a principal part side view of the filter board which hangs the filter cloth which concerns on this invention.

FIG. 1 is a side view of a filter press using a filter cloth cleaning apparatus according to the present invention.
The filter press 1 of the present invention includes frames 2 and 2 arranged on the left and right, a pair of guide rails 3 and 3 supported between the frames 2 and 2, and a plurality of filter plates 4 arranged in parallel so as to be movable on the guide rail 3. And an opening / closing device 5 that opens and closes the filter plate 4.

A pair of excitation shafts 6 are disposed above the filter plate 4 along the guide rail 3. A support bar 7 is swingably disposed on the upper portion of the filter plate 4 and bridged on the excitation shaft 6. The filter cloth 8 is arranged between the filter plates 4 and 4 by suspending the filter cloth 8 on the support bar 7. When the vibrator 9 of the vibration shaft 6 is activated, the support bar 7 bridged on the vibration shaft 6 vibrates, the filter cloth 8 suspended from the support bar 7 swings, and the filter cloth 8 jumps up and down.

FIG. 2 is a front view of main parts of the filter plate assembly and the filter cloth cleaning device according to the present invention.
A filter plate arm 10 to be supported on the guide rail 3 is disposed on both side shoulders of the filter plate 4, and the filter plate 4 is movably arranged in parallel on the guide rail 3. An undiluted solution supply path 11 is formed in the upper center portion of the filter plate 4.
A concave filter bed 12 is formed at the center of the filter plate 4, and a filter cloth 8 is stretched on the filter bed 12, and the stock solution is placed between the filter cloths 8 stretched between the filter plates 4 and 4. Supply and dehydrate.

Guide shafts 13 that support the support bar 7 are erected on both shoulders of the filter plate 4. A spring 14 is extrapolated to the guide shaft 13, and the support bar 7 is supported on the spring 14 so as to be elastically swingable. A plurality of latches 15 for suspending the filter cloth 8 are provided on both side surfaces of the support bar 7.

The support bar 7 above the filter plate 4 is bridged by a pair of vibration shafts 6 provided above the guide rail 3. When the vibrator 9 of the vibration shaft 6 is operated, the filter cloth 8 suspended from the support bar 7 is vibrated, and the dewatered cake attached to the filter cloth 8 is peeled off. The vibration shaft 6 vibrates up and down by the vibration of the vibrator 9, and the support bar 7 bridged to the vibration shaft 6 jumps up by a spring 14 inserted through the guide shaft 13.

A cleaning nozzle 16 is disposed on the upper side surface of the vibration shaft 6. Moreover, the filter cloth 8 stretched on the filter plate 4 is cleaned by arranging the cleaning nozzle 16 toward the filter plate 4.
The vibration shaft 6 is hollow and forms a cleaning liquid supply passage 17 therein. Therefore, the cleaning liquid supplied to the supply path 17 is sprayed from the cleaning nozzle 16 toward the filter cloth 8 stretched on the filter plate 4. By providing the cleaning nozzle 16 on the top of the vibration shaft 6, the cleaning liquid remaining on the vibration shaft 6 does not leak from the cleaning nozzle 16 after the cleaning is completed.
The vibration shaft 6 may have a cross-sectional shape such as a rectangle or a circle. A pipe may be provided inside and outside the vibration shaft 6 to form the supply path 17.
In addition, the cleaning nozzle 16 is disposed between the opened filter plates 4 and 4, and is disposed between the filter plates 4 so that all the filter cloths 8 can be simultaneously cleaned.

Further, as shown in FIG. 1, one end of the vibration shaft 6 is connected to the cleaning water storage tank 18, and the cleaning water is supplied to the vibration shaft 6 by the cleaning water supply pump 19.

FIG. 3 is a front view of the filter cloth according to the present invention. A bag portion 20 is formed on the upper edge portion of the rectangular filter cloth 8. A filter cloth support bar 21 is inserted into the bag portion 20, and the filter cloth support bar 21 is locked to the latch 15 of the support bar 7. The bag part 20 opens a plurality of cutout holes 22 at positions where it is locked with the latch 15. In the upper center of the filter cloth 8, there is provided a stock solution supply through hole 23 which is brought into contact with the stock solution supply path 11 of the filter plate 4.

FIG. 4 is a side view of an essential part of a filter plate for suspending a filter cloth according to the present invention. The filter cloth support bar 21 inserted through the bag portion 20 at the top of the filter cloth 8 shown in FIG. 3 is exposed from the notch hole, and the latch 15 of the support bar 7 disposed at the top of the filter plate 4 shown in FIG. The filter cloth support bar 21 exposed from the notch hole 22 is locked, and the filter cloth 8 is suspended. The filter cloth 8 is suspended from the front surface of the filter bed 12 provided before and after the filter plate 4. The upper end portion of the latch 15 erected on the upper surface of both sides of the support bar 7 is bent, and the filter cloth support bar 21 at the upper edge of the filter cloth 8 is supported by the repulsive force of the compression energy of the spring 14 externally attached to the guide shaft 13. 7 to prevent release.

As shown in FIG. 4, a stock solution supply plate 24 is fixed to one of a pair of filter cloths 8 suspended between the filter plates 4, 4, and the stock solution supply path 11 formed on the filter plate 4 and the filter cloth 8 are connected. A stock solution passage 25 of the stock solution supply plate 24 is fitted into the through hole 23 in the upper central portion, and a supply path 26 is provided which branches from the stock solution passage 25 of the stock solution supply plate 24 and supplies the stock solution to the filtration surface of the filter cloth 8. is there.

The operation method of the filter press 1 will be described in detail.
First, the filter plate opening / closing device 5 is operated, and a plurality of filter plates 4 arranged in parallel with the guide rail 3 are moved to one side and closed. A filter cloth 8 is stretched on the filter bed 12 on both sides of the closed filter plate 4, and a filtration chamber is formed between the filter cloths 8 stretched between the filter plates 4 and 4. The stock solution is supplied to the filtration chamber through the stock solution supply path 11 to perform dehydration. The filtrate that has passed through the filter cloth 8 is discharged to the outside through a discharge port (not shown) provided in the filter bed 12.

After the dehydration is completed, the filter plate 4 is opened by the filter plate opening / closing device, and the dehydrated cake is discharged. The vibrator 9 provided on the vibration shaft 6 is activated, and the support bar 7 bridged on the vibration shaft 6 is swung. The filter cloth 8 suspended from the support bar 7 jumps up together with the support bar 7, and the dewatered cake attached to the filter cloth 8 is peeled off.

After the dewatered cake is peeled off, the cleaning water is supplied from the cleaning water storage tank 18 to the supply path 17 provided in the vibration shaft 6. Washing water is sprayed from the supply path 17 toward the filter cloth 8 from the cleaning nozzle 16 provided on the vibration shaft 6 to wash the filter cloth 8.
After the cleaning of the filter cloth 8, the filter plate is closed again and dewatered.

The filter cloth cleaning device of the filter press according to the present invention eliminates the need to separately provide a cleaning water supply pipe by using the vibration shaft as a cleaning water supply path, and can reduce the number of parts of the dehydrator and is compact. Since it is a filter press, it can be used not only for dewatering water and industrial sludge but also for production processes in chemical plants.

1 Filter Press 2 Frame 3 Guide Rail 4 Filter Plate 6 Excitation Shaft 7 Support Bar 8 Filter Cloth 16 Washing Nozzle 17 Supply Path

Claims (3)

A large number of filter plates (4...) Are opened and closed in parallel with the guide rail (3) supported between the frames (2, 2), and the excitation shaft (6) provided along the guide rail (3). A filter cloth cleaning device for a filter press (1) that bridges a support bar (7) suspended from a filter cloth (8) and peels the dewatered cake adhering to the filter cloth (8) by vibration of the vibration shaft (6). In
A cleaning liquid supply path (17) provided on the vibration shaft (6);
A cleaning nozzle (16) provided on the vibration shaft (6) for injecting the cleaning liquid from the supply path (17) toward the filter cloth (8);
A filter cloth cleaning device for a filter press, comprising: The filter cloth cleaning device for a filter press according to claim 1, wherein the supply path (17) is provided in a hollow vibration shaft (6). A filter press filter according to claim 1 or 2, wherein the cleaning nozzle (16) is disposed between the opened filter plates (4) and is provided at an upper portion of the vibration shaft (6). Cloth cleaning device.

Images