JP6070960B2 - Filter cloth hanging device in filter cloth traveling type filter press - Google Patents

Description

The present invention relates to a filter press that lifts and lowers a filter cloth and peels a dehydrated cake, and hangs the filter cloth in a filter cloth traveling type filter press that lifts and lowers the filter cloth in an interlocked manner with the opening and closing plate of the filter plate. Relates to the device.

The filter press hangs a pair of filter cloths between the filter plates that can be freely opened and closed, presses the stock solution from the stock solution supply plate fixed to the filter cloths into the filtration chamber between the filter cloths, and separates the solid and liquid with the filter cloths. Is going. Various techniques are used as a method of peeling the dewatered cake remaining in the filtration chamber and fixed to the filter cloth after the solid-liquid separation.

In Cited Document 1, a filter press in which a pair of filter cloths with upper end edges joined together is hung on a sprocket that can be rotated in forward and reverse directions, and each lower edge end is hung on a roll provided below the filter plate. Discloses a device that peels the dehydrated cake by rotating the slide shaft and lowering the filter cloth while inverting it with a roll.

Further, in Patent Document 2, a pair of filter cloths with the upper edge joined together are suspended from a support member, and the lower edge ends of the filter cloth are hung on rollers provided at the lower portions of the left and right filter plates, and a string-like connector is attached. In the filter press connected in the above, there is disclosed an apparatus for automatically lifting and lowering the filter cloth in conjunction with opening and closing of the filter plate and peeling the dewatered cake with a roller.

Japanese Patent No. 5333945 (FIGS. 6 to 8) Japanese Patent Publication No.55-37929

The apparatus of the cited document 1 peels the dehydrated cake adhering to the filter cloth by reversing the filter cloth with a roll below the filter plate, but requires a separate power source for raising and lowering the filter cloth. Further, a connecting device between the power source and the lifting device is also required, and the structure becomes complicated. Moreover, since the filter cloth is lowered after the filter plate is opened, miscellaneous time other than the filtration becomes longer.

Since the filter cloth automatically descends in conjunction with the opening of the filter plate, the apparatus of the cited document 2 does not require a power source for raising and lowering the filter cloth, and can reduce miscellaneous time other than filtration. However, in this apparatus, the lifting range of the filter cloth is purely proportional to the opening / closing distance of the filter plate. Specifically, if there is no filter plate opening / closing distance sufficient to satisfy the entire length of the filter cloth, which is connected to the lower edge of the filter cloth and laced around it, the filter cloth can be raised and lowered sufficiently. Can not. In general, a filter press has a large number of filter plates arranged in parallel in order to increase the throughput. As a result, the overall length becomes longer and the installation space becomes larger. Accordingly, when the filter plate opening distance is increased, the installation area of the filter press is increased. Therefore, it is a problem to lift and lower the filter cloth with a small filter plate opening distance to separate the dewatered cake.

Further, since the filter cloth is a consumable item, it needs to be replaced after being used a predetermined number of times or for a predetermined time. At that time, when the filter plate is opened to replace the filter cloth, the filter cloth descends in conjunction with the movement of the filter plate. If the filter cloth is replaced while the filter cloth is lowered, the position (height) of the stock solution supply plate for supplying the stock solution to the filtration chamber may be shifted when the filter plate is closed. If the stock solution supply plate is closed with the position shifted, not only the stock solution cannot be press-fitted and supplied to the filtration chamber, but also the stock solution supply plate or the filter bed of the filter plate may be damaged. Therefore, when exchanging the filter cloth, it is desirable that the filter cloth be exchanged in a raised state, and that the stock solution supply plate of the exchanged filter cloth can be visually confirmed to be coincident with the concave portion of the filter bed.

The present invention provides a filter cloth suspending device in a filter cloth traveling type filter press capable of automatically moving up and down in conjunction with opening and closing of a filter plate and exchanging the filter cloth at a predetermined position when replacing the filter cloth. .

The gist of the present invention is a filter press in which a plurality of filter plates are juxtaposed to form a filtration chamber between the filter plates, and a pair of filter cloths each having an upper edge connected to the filtration chamber are suspended up and down. A lower filter cloth mandrel is inserted into the lower end edge, and a filter cloth sandwiching a stock solution supply plate having a stock solution passage communicating with a stock solution supply port of the filter plate is connected to a filter plate adjacent above the filter plate and connected A filter plate link that pivotally attaches a pulley, a connecting rope that connects one end to the upper end of the filter cloth, hangs around a pulley and return roll provided on the filter plate, and connects the other end to the lower filter cloth core, and a filter plate Connect the head bar bridged to the upper bracket standing on the upper end of both ends, the head bar of the adjacent filter plate, and the horizontal pantograph configured to be stretchable parallel to the upper surface of the filter plate, and the upper end connected to the horizontal pantograph , Connect the lower end to the upper edge of the filter cloth and expand and contract in parallel with the filter bed of the filter plate Which was a vertical pantograph configured to standing, you can raise and lower the filter cloth by linking to the opening and closing operation of the filter plate in a non-powered. Therefore, a special power source for raising and lowering the filter cloth is unnecessary, and miscellaneous time other than the dehydration process can be shortened.

Also, a pair of head pins are inserted into the head bar, a horizontal pantograph is rotatably fixed to the head pin, and the horizontal pantographs of adjacent filter plates are slidably connected to each other by a connecting bar, and when the filter plate is closed Since the central portion of the horizontal pantograph is formed in a concave shape, the stock solution supply plate can be easily set at a predetermined position even when the filter plate is opened during filter cloth replacement.

In addition, the upper end of the vertical pantograph is connected to a connector provided on the connecting bar, and the lower end of the vertical pantograph is connected to a slot formed in the lower bar, so that the lower bar and the upper filter cloth core are connected. Even with a slight opening and closing, a large lifting range can be set, and the overall length of the filter press can be suppressed.

Since the filter cloth according to the present invention is linked to the opening and closing operation of the filter plate and the filter cloth moves up and down without power, it is possible to shorten miscellaneous time other than the dehydration process. Since the filter cloth lifting height is always linked to the opening and closing of the filter plate, a filter cloth position detector or the like is unnecessary. By devising the structure of the link mechanism, a large lifting range can be set even with a slight opening and closing of the filter plate, and the overall length of the filter press can be suppressed. Accordingly, it is possible to deal with simultaneous opening of multiple rooms. In addition, since the filter cloth starts to rise slightly after opening the plate, the stock solution supply plate sandwiched between the filter cloths can be easily set at a predetermined position when replacing the filter cloth.

It is a side view of the filter press concerning the present invention. Similarly, it is a front view of a filter plate assembly in which a filter cloth is suspended. Similarly, it is a perspective view of a pair of filter cloths suspended between the filter plates. Similarly, it is a principal part side view of the filter press which hangs a pair of filter cloth between filter plates. Similarly, it is a top view of a lifting device. Similarly, it is a principal part sectional side view of a raising / lowering apparatus. Similarly, it is a front view of the lifting device. Similarly, it is explanatory drawing of the raising / lowering apparatus attached to the filter plate of a closed plate state. Similarly, it is explanatory drawing of the raising / lowering apparatus attached to the filter plate of the state immediately after opening. Similarly, it is explanatory drawing of the raising / lowering apparatus attached to the filter plate of the state opened further. Similarly, it is explanatory drawing of the raising / lowering apparatus attached to the filter plate of an open plate completion state.

FIG. 1 is a side view of a filter press according to the present invention. The filter press 1 supports a number of filter plates 5 movably supported on a guide rail 4 bridged between a front frame 2 and a rear frame 3. The filter chamber 5 formed between the adjacent filter plates 5 and 5 is opened and closed by moving the filter plate 5 in the direction of the rear frame 3 by the opening / closing device 6 provided in the front frame 2.

FIG. 2 is a front view of a filter plate assembly for suspending a filter cloth, and the filter plate arms 8 and 8 of the filter plate 5 are supported on a pair of guide rails 4 and 4 bridged by the front frame 2 and the rear frame 3. ing.
Upper brackets 9 and 9 are erected on the upper ends of both ends of the filter plate 5. A filter plate link support 10 projects from the upper bracket 9, and a pair of filter plate links 11, 11 are rotatably attached to the filter plate link support 10. The filter plate links 11 are respectively connected to the filter plate links 11 disposed on the adjacent filter plates 5, and the filter plate link bar 12 is inserted through the connecting portion. Pulleys 13 and 13 are pivotally attached to the end of the filter plate link rod 12. A head bar 14 is bridged at the upper ends of the upper brackets 9 and 9.

A pair of return rolls 16, 16 are bridged to lower brackets 15, 15 hanging from the lower ends of both ends of the filter plate 5, and a cleaning pipe 17 is disposed near the lower side of the return roll 16. A filter bed 5a is formed at the center of the filter plate 5, and a stock solution supply port 18 is opened at the upper center and a filtrate discharge port 19 is opened at both lower ends.

FIG. 3 is a perspective view of a pair of filter cloths hung between the filter plates. The filter cloth 20 hung between the filter plates 5 and 5 is formed by joining the upper end edges of the pair of filter cloths 20 and 20 together. The bag part 21 is formed and the upper filter cloth core 22 is inserted. A bag portion 23 is formed at each lower edge of the filter cloth 20 and a lower filter cloth core 24 is inserted therethrough. The stock solution supply plate 25 is sandwiched between the pair of filter cloths 20, 20, and the stock solution passage 27 of the stock solution supply plate 25 is fitted into the through hole 26 opened in the upper center portion of the filter fabric 20. A liquid supply path 28 is provided that branches from the raw liquid passage 27 and supplies the raw liquid to the filtration surface of the filter cloth 20.

FIG. 4 is a side view of a main part of a filter press for suspending a pair of filter cloths between filter plates, and a pair of filter cloths 20 and 20 are disposed between the parallel filter plates 5. One end of a connecting rope 29 is connected to both end portions of the upper filter cloth core bar 22 on which the cloths 20 and 20 are suspended, and is hung around pulleys 13 and 13 that are provided on the filter plate link rod 12 as shafts. A lower filter cloth core inserted through the lower end of the filter cloth 20 by hanging the lower end portion of the filter cloth 20 suspended before and after the filter plate 5 around a pair of return rolls 16 and 16 disposed below the filter plate 5. The filter cloth 20 is suspended by connecting both ends of the gold 24 to the other end of the connecting rope 29. A part of the filter cloth 20 and the connecting rope 29 move around the return roll 16 and the pulley 13 as the filter cloth 20 moves up and down. The connecting rope 29 may be a known part having flexibility such as a string or a chain.

When the parallel filter plates 5 are closed, the undiluted solution supply plate 25 suspended on the filter cloth 20 is sandwiched between the front and rear filter plates 5 and 5 and a pair of filter cloths stretched on the filter bed 5a of the filter plate 5 A filtration chamber 7 is formed between 20 and 20. The undiluted solution supply port 18 formed in the filter plates 5 and 5 and the undiluted solution passage 27 of the undiluted solution supply plate 25 are communicated, and the undiluted solution is press-fitted into the filtration chamber 7 from the supply channel 28 of the undiluted solution supply plate 25, and the filter cloth 20 is filtered. Solid-liquid separation on the surface.

FIG. 5 is a plan view of the lifting device, in which a pair of head pins 30, 30 are inserted into the head bar 14 bridged above the filter plate 5, and the horizontal pantographs 31, 31 are turned around the head pins 30, 30. It is fixed freely. The horizontal pantograph 31 is installed in parallel with the upper surface of the filter plate 5. When the horizontal pantographs 31 and 31 of the adjacent filter plates 5 and 5 are slidably connected to each other by the connecting bar 32, the horizontal pantograph 31 fluctuates in an uneven manner according to the opening and closing of the filter plate 5, and the connecting bar 32 and The distance between 32 is displaced. A connecting tool 34 is provided at the center of the connecting bar 32 to hang a vertical pantograph 33.

FIG. 6 is a sectional side view of the main part of the lifting device. A horizontal pantograph 31 is fixed to a head pin 30 provided on the head bar 14, and horizontal pantographs 31, 31 of adjacent filter plates 5, 5 are connected by a connecting bar 32. It is slidably connected. Further, the filter plate link 11 attached to the upper bracket 9 is fixed to the adjacent filter plate link 11 so as to be rotatable. Since each filter plate link 11 and 11 is the same length, when the filter plate 5 opens, the coupling part of the filter plate links 11 and 11 will be located in the middle of each filter plate 5 .... Accordingly, since the pulley 13 attached to the coupling portion of the filter plate link 11 is always located at the intermediate portion between the adjacent filter plates 5 and 5, the connecting rope 29 that hangs around the filter cloth 20 interferes with the filter plate 5. do not do.

FIG. 7 is a front view of the lifting device, in which a connecting tool 34 is provided at the center of the connecting bar 32, and a vertical pantograph 33 is vertically extended in parallel with the filter bed 5 a of the filter plate 5. The lower end of the vertical pantograph 33 is connected to a long hole formed in the lower bar 35 and is connected to the lower bar 35 and the upper filter cloth core 22 of the filter cloth 20.

The distance between the connecting bars 32, 32 is displaced according to the opening / closing of the filter plate 5, and the amount of expansion / contraction of the vertical pantograph 33 is varied according to the amount of displacement, thereby moving the filter cloth 20 up and down. If the vertical pantograph 33 is configured in multiple stages according to the lifting distance of the filter cloth 20, the lowermost stage can extend to the lower side of the filter plate 5 even with a slight opening distance of the filter plate 5. In addition, the broken line has shown the state where the vertical pantograph is folded and the filter cloth 20 is rising.

FIG. 8 is an explanatory view of the lifting device attached to the filter plate in the closed plate state, and details the operating states of the filter plate and the filter cloth.

(A) is a schematic plan view, and the position of the head pin 30 and the lengths of the horizontal pantograph 31 and the connecting bar 32 are set so that the central part of the horizontal pantograph 31 becomes concave when the filter plate 5 is closed. At this time, the distance between the connecting bars 32 is 32, and the vertical pantograph 33 is reduced in accordance with the distance L.

(B) is a schematic cross-sectional side view in which the stock solution passage 27 of the stock solution supply plate 25 and the stock solution supply port 18 of the filter plate 5 are at the same height, and the stock solution supplied from the stock solution supply port 18 is the stock solution supply plate 25. The raw material passage 27 and the liquid supply passage 28 are pressed into the filtration chamber 7. In addition, since the filter cloth 20 is suspended from the central portion of the connection bar 32 via the connection tool 34 and the vertical pantograph 33, the filter cloth 20 is always located at an intermediate position of the filter plate 5.

(C) is a schematic front view, and the vertical pantograph 33 is folded upward to a position where it does not interfere when the filter plate 5 is closed according to the distance L between the connecting bars 32 and 32.

FIG. 9 is an explanatory view of the lifting device attached to the filter plate in a state immediately after opening.
(A) is a schematic plan view, and the horizontal pantograph 31 is connected to the connecting bar 32 in a linear state. At this time, the distance between the connecting bars 32 and 32 has the maximum distance, and is longer by Δl than when the plate is closed.

  (B) is a schematic side sectional view, and the vertical pantograph 33 is in a state where the vertical pantograph 33 is reduced in accordance with the distance L + Δl between the connecting bars 32 and 32, and the filter cloth 20 is slightly raised upward. The stock solution supply plate 25 sandwiched between the filter cloths 20 and 20 is also lifted, and the stock solution passage 27 of the stock solution supply plate 25 and the stock solution supply port 18 of the filter plate 5 are shifted.

(C) is a schematic front view, and the vertical pantograph 33 is further folded upward according to the distance L + Δl between the connecting bars 32 and 32.

FIG. 10 is an explanatory view of the lifting device attached to the filter plate in a further opened state.
(A) is a schematic top view, Comprising: The horizontal pantograph 31 is connected with the connection bar 32 in the state by which the center part became convex shape. Since it has an angle symmetric to that at the time of closing (FIG. 8), at this time, the distance between the connecting bars 32 and 32 is the same distance L as at the time of closing.

  (B) is a schematic side sectional view, and the vertical pantograph 33 is slightly extended according to the distance L between the connecting bars 32, 32, and the stock solution passage 27 of the stock solution supply plate 25 and the stock solution supply port 18 of the filter plate 5 are It becomes the same height. If the opening distance between the filter plates 5 and 5 at this time is set to such a distance that the filter cloth 20 can be replaced, the stock solution passage 27 of the stock solution supply plate 25 and the stock solution supply port 18 of the filter plate 5 are visually the same height. Therefore, the filter cloth can be surely exchanged.

(C) is a schematic front view, and the vertical pantograph 33 is slightly expanded according to the distance L between the connecting bars 32 and 32, but is folded upward.

FIG. 11 is an explanatory view of the lifting device attached to the filter plate in a state where the opening plate is finished.
(A) is a schematic top view, Comprising: The horizontal pantograph 31 is connected with the connection bar 32 in the state by which the center part became convex shape. At this time, the distance between the connection bars 32 and 32 is the minimum distance Lmin.

  (B) is a schematic cross-sectional side view, and the vertical pantograph 33 is in a state where the vertical pantograph 33 expands according to the distance Lmin between the connecting bars 32, 32 and the filter cloth 20 descends downward. The dehydrated cake is peeled off from the filter cloth 20 when it is reversed by the return roll 16.

(C) is a schematic front view, and the vertical pantograph 33 is extended to the lowest position in accordance with the distance Lmin between the connecting bars 32 and 32.

The filter press according to the present invention is linked to the opening and closing operation of the filter plate, so that the filter cloth can be lifted and lowered without any power. Therefore, a special power source for raising and lowering the filter cloth is not required, and the miscellaneous time other than the dehydration process can be reduced. Further, when replacing the filter cloth, the stock solution supply plate can be easily set at a predetermined position. Furthermore, even if the opening width of the filter plate is small, the lifting range of the large filter cloth can be set, and the overall length of the filter press can be suppressed. Therefore, in the treatment of purified water sludge, sewage sludge, industrial wastewater sludge, etc., it is effective for a filter press in a large-size / other room that treats a large volume of stock solution.

DESCRIPTION OF SYMBOLS 1 Filter press 5 Filter board 7 Filtration chamber 9 Upper bracket 11 Filter board link 13 Pulley 14 Head bar 16 Return roll 18 Stock solution supply port 20 Filter cloth 24 Lower filter cloth metal core 25 Stock solution supply plate 27 Stock solution passage 29 Connection rope 30 Head pin 31 Horizontal pantograph 32 Connecting bar 33 Vertical pantograph 34 Connecting tool 35 Lower bar

Claims (3)

A plurality of filter plates (5 ...) are arranged in parallel to form a filtration chamber (7) between the filter plates (5, 5), and a pair of filter cloths (20) each having an upper edge connected to the filtration chamber (7) (20). , 20) In a filter press (1) that hangs up and down freely,
A filter cloth (20) having a stock solution passage (27) having a stock solution passage (27) communicating with the stock solution supply port (18) of the filter plate (5) through the lower filter cloth core (24) at the lower end edge. )When,
A filter plate link (11) for connecting adjacent filter plates (5, 5) above the filter plate (5), and pivotally attaching a pulley (13) to the connecting portion;
A connecting rope that connects one end to the upper end of the filter cloth (20), hangs around the pulley (13) and return roll (16) provided on the filter plate (5), and connects the other end to the lower filter cloth core (24). (29)
A head bar (14) bridged to upper brackets (9, 9) standing on both ends of the filter plate (5);
A horizontal pantograph (31) configured to connect the head bars (14, 14) of the adjacent filter plates (5, 5) and to be stretchable in parallel with the upper surface of the filter plate (5);
A vertical pantograph (33) having an upper end connected to the horizontal pantograph (31), a lower end connected to the upper edge of the filter cloth (20), and configured to be stretchable in parallel with the filter bed (5a) of the filter plate (5);
A filter cloth suspending device in a filter cloth traveling type filter press. Insert a pair of head pins (30, 30) through the head bar (14),
A horizontal pantograph (31) is rotatably fixed to the head pin (30),
The horizontal pantographs (31, 31) of the adjacent filter plates (5, 5) are slidably connected by the connecting bars (32, 32), respectively.
The filter cloth suspending device in the filter cloth traveling type filter press according to claim 1, wherein the center portion of the horizontal pantograph (31) is formed in a concave shape when the filter plate (5) is closed. The upper end of the vertical pantograph (33) is connected to a connection tool (34) provided on the connection bar (32), and
Connect the lower end of the vertical pantograph (33) to the slot formed in the lower bar (35),
3. The filter cloth suspending device in the filter cloth traveling type filter press according to claim 2, wherein the lower bar (35) and the upper filter cloth mandrel (22) are connected.

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