JP4964804B2 - Filter plate support structure - Google Patents

Description

  The present invention relates to a support structure for a filter plate used for concentration of sludge in a water purification plant, a sewage treatment plant, or the like.

  Generally, sludge discharged from a water purification plant or a sewage treatment plant usually contains 90% or more water. Therefore, in treating these sludges, first, dehydration is performed, the sludge is concentrated to reduce the amount, and incineration or landfilling is performed.

  For the sludge dehydration treatment, mechanical dehydration by pressurization or vacuum is generally used. However, these mechanical dehydrations require a large amount of energy for processing. Therefore, using the principle of siphon, the sludge is sucked and adhered to the surface of the filtering means such as filter cloth, and the moisture (filtrate) in the sludge is sucked and concentrated to reduce the energy load in mechanical dehydration. .

  In Patent Document 1 below, as a filter concentrating device using the principle of siphon, a filter plate (filter panel) surrounded by a filter cloth net is suspended around the filter chamber in the sludge chamber of the filter tank, and the water in the contamination Is filtered into the filtration chamber, and the filtrate is discharged through the filtrate discharge pipe provided in communication with the filtration chamber. It is disclosed. Moreover, in order to perform a filtration process more efficiently, it is preferable to ensure a large filtration area of the filter plate. Therefore, a plurality of filter plates are often arranged in the filter chamber.

  However, when a plurality of filter plates are arranged in the filter tank, if the filter plate is immersed in sludge and the sludge remains attached to the filter cloth formed of nylon or the like for a long time, the filter cloth swells. In some cases, the filter cloths gradually become loose and adjacent filter cloths come into contact with each other, reducing the filtration area.

Therefore, in Patent Document 2 below, a method for fixing the filter plate shown in FIG. 8 is disclosed in order to prevent contact between adjacent filter cloths. That is, the filter plate 30 having the filter cloth 34 and the fixed frame 1 that is disposed on the outer periphery of the filter plate 34 and is fitted in the guide groove formed between the filter plate 34 and the fixed frame 1. A plurality of elastic members 3 are interposed therebetween, and both ends of the elastic members 3 are attached to the filter plate 30 and the fixed frame 1, respectively. A plurality of elastic members 3 are arranged over the entire circumference of the filter plate 30 in the upper, lower, left and right directions. Therefore, even if sludge adheres to the filter cloth 34 for a long time, the elastic filter 3 is pulled by the elastic member 3, thereby suppressing the slackness of the filter cloth 34 and preventing the filter cloths 34 from contacting each other. ing.
Japanese Examined Patent Publication No. 62-58762 Japanese Patent Publication No. 3-23203

  In the case of the above-mentioned patent document 2, since the filter plate 30 is attached to the fixed frame 1 via the elastic member 3 arranged around the filter plate 30, a space for arranging the elastic member 3 is required. There is a problem that the filtration area of the filter plate 30 is reduced by the amount of the member 3.

  Accordingly, an object of the present invention is to provide a support structure for a filter plate that can prevent adjacent filter cloths from contacting each other and can secure the maximum filter area of the filter cloth.

In order to achieve the above object, the first support structure for a filter plate according to the present invention is to filter a filter plate in which the outer periphery of the support is covered with a bag-shaped filter cloth and the inside of the filter cloth is a filter chamber. In the support structure of the filter plate that supports a plurality of plane portions in parallel in the tank at a predetermined interval in the vertical direction,
A support bar is attached to the upper and lower edges of the filter cloth, and the filter cloth is stretched and supported by the weight of the support bar attached to the lower edge part, and arranged vertically on both sides of the filter cloth. The guide rod is inserted, and the upper and lower ends of the guide rod are slidably held along the support rod by a predetermined distance.

  According to the above invention, by suctioning through the filtration chamber of the filter plate, water in the sludge introduced into the filtration tank is filtered to the filtration chamber side through the filter cloth, and moisture can be removed from the sludge by filtration. In addition, the filter cloth is pulled by the weight of the support bar attached to the lower edge portion, and the movement of the filter cloth is prevented by the guide bars inserted on both sides of the filter cloth, so that compressed air or the like is contained in the filter chamber. The filter cloth flutters when the sludge deposited on the filter cloth surface is blown off and the filter cloth loosens when deformation occurs due to the elongation of the filter cloth itself. It is possible to prevent the filter areas from being reduced due to the filter cloths sticking together.

  Moreover, since a space for supporting is not required around the filter plate, the filtration area can be increased. Furthermore, since the guide bar is arranged so that it can move by a predetermined distance with respect to the upper and lower support bars, the filter cloth is allowed to swell to some extent in the sludge removal process by air, so that the filter cloth cannot be swollen. It is possible to prevent an excessive tensile force from being applied, and to make it easier for the sludge deposited and deposited on the filter cloth surface to be peeled off.

In the support structure of the filter plates of the present invention, the guide rod is made from the suction tube, the suction opening of the suction pipe is arranged inside the filter cloth, the lower end portion on the suction pipe along said support rod it is preferred that the predetermined distance Ru slidably is held.

  According to the above invention, the filter cloth is pulled by the weight of the support bar attached to the lower edge, and the backwashing is prevented by the movement of the filter cloth by the suction pipes inserted on both sides of the filter cloth. The filter cloth is prevented from fluttering when the filter cloth flutters and the deformation due to elongation of the filter cloth itself occurs, and the filter cloth loosens and the adjacent filter cloths stick together to reduce the filtration area. Can be prevented. Moreover, since a space for supporting is not required around the filter plate, the filtration area can be increased. Furthermore, the suction tube can be used as a guide rod for supporting both sides of the filter cloth, and suction ports of the suction tube can be provided at a plurality of locations.

In the support structure of the filter plate of the present invention, the protrusions that form a predetermined distance when contacting the support rods of the adjacent filter plates at both ends of the support rod attached to the lower edge of the filter cloth. it is preferred to Ru provided parts.

  According to the above invention, the filter cloth is pulled by the weight of the support bar attached to the lower edge part, and the protrusions of the support bar attached to the lower edge part come into contact with each other to restrain mutual movement. Therefore, fluttering of the filter cloth during backwashing and slackening of the filter cloth when deformation due to elongation of the filter cloth itself occurs are prevented. In addition, the protrusion of the support bar attached to the lower edge keeps the distance between the filter plates more than a predetermined distance, so even if the filter cloth is loosened, the adjacent filter cloths stick together to reduce the filtration area. Can be prevented.

  According to the present invention, the filter cloth is pulled by the weight of the support bar attached to the lower edge portion, and the movement of the filter cloth is prevented by the guide bar or the suction tube inserted on both sides of the filter cloth. , Fluttering of the filter cloth during backwashing and slackening of the filter cloth when deformation due to elongation of the filter cloth itself is prevented, the filter cloth is loosened and the adjacent filter cloths stick together to reduce the filtration area Can be prevented. Moreover, since a space for supporting is not required around the filter plate, the filtration area can be increased.

  Hereinafter, an embodiment of a support structure for a filter plate of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of a support structure for a filter plate according to the present invention. Fig.1 (a) is a schematic block diagram of the sludge concentration processing apparatus using the support structure of the said filter plate, FIG.1 (b) shows the attachment state at the time of attaching a filter plate inside the same process apparatus. It is explanatory drawing. 2A and 2B show a support structure of the filter plate, in which FIG. 2A is an explanatory view showing a schematic configuration thereof, and FIG.

  With reference to FIG. 1, the structure of the sludge concentration processing apparatus (henceforth "a processing apparatus") by which the support structure of the filter plate of this invention was employ | adopted is demonstrated. This processing apparatus includes a filtration tank 10 for dewatering and concentrating sludge, a filter plate 30 disposed in the filtration tank 10 for filtering sludge and performing the dehydration process, and the filtration tank 10. It is mainly composed of a filtrate storage tank 16 that is disposed outside and stores filtrate obtained by dewatering sludge.

  The filtration tank 10 has a bottomed box shape extending in a predetermined direction so that a plurality of filtration plates 30 to be described later can be arranged in parallel, and the lower part thereof is configured to be tapered toward the bottom wall. ing. One end of a sludge supply pipe 12 is connected to and connected to the lower side wall of the filtration tank 10, and a sludge supply / discharge pump P is connected to the middle of the pipe line via a sludge supply / discharge valve V1. Thereby, the sludge supply / discharge pump P is operated and the sludge supply / discharge valve V1 is opened, so that sludge (unconcentrated sludge) can be fed into or extracted from the filtration tank 10. Further, one end of the concentrated sludge extraction pipe 14 is connected to the bottom wall of the filtration tank 10 in communication therewith. A sludge discharge valve V2 is provided in the middle of the concentrated sludge extraction pipe 8, and the sludge discharge valve V2 is opened so that the concentrated sludge can be discharged from the lower portion of the filtration tank 10 to the outside.

  On the other hand, a water supply pipe 18 provided with a water supply valve V3 is connected to the bottom wall of the filtrate storage tank 16 disposed outside the processing apparatus so that tap water is supplied. Similarly, the bottom wall of the filtrate storage tank 16 is connected to a filtrate discharge pipe 20 in which a drawing valve V4 is arranged in the middle of the pipe line, so that the filtrate stored in the filtrate storage tank 16 can be discharged to the outside. It has become. Further, one end of a distribution pipe 25 connected to the filter plate 30 is connected to the upper side wall of the filtrate storage tank 16 in communication. An air inflow pipe 22 having an air inflow valve V5 disposed in the middle of the conduit is connected to the upper wall of the filtrate storage tank 16 so as to communicate compressed air from the compressor C connected to the other end. The distribution pipe 25 can be blown.

  Next, a plurality of filter plates 30 arranged in the filter tank 10 will be described with reference to FIG. The filter plate 30 includes a support 32 and a bag-shaped filter cloth 34 that covers the outer periphery of the support 32. The support 32 is formed in a rectangular or square shape by a net or mesh net, and has a hollow frame shape having a predetermined rigidity. The bag-like filter cloth 34 covering the outer periphery of the support 32 is formed by, for example, overlapping a pair of rectangular cloth bodies to fix the peripheral portions, or bending a single cloth body at a predetermined position. The two sides are overlapped and the peripheral portions are fixed to form a bag shape.

  Then, with the outer periphery of the support 32 covered with the filter cloth 34, a predetermined interval is provided in the width direction (direction perpendicular to the vertical direction), and the support 32 is supported via the seam 36 provided along the vertical direction. A filter cloth 34 is sewn to the body 32. As a result, a filter plate 30 is formed in which a plurality of filter chambers R extending in the vertical direction and arranged in the width direction are defined inside.

  As shown in the partial enlarged view of FIG. 2A, in this embodiment, the upper and lower peripheral edges of the both sides in the width direction of the bag-shaped filter cloth 34 are not sewn, and a pair of seams 36a extending vertically. , 36a, the cloth body is sewn. Thereby, cylindrical guide support portions 37, 37 having upper and lower openings are formed on both sides of the filter cloth 34. Cylindrical guide rods 50 and 50 are inserted into and supported by the cylindrical guide support portions 37 and 37, respectively. The upper and lower ends of the guide bar 50 are set to be inserted into openings 43 of support bars 40 and 41, which will be described later. The guide bar 50 is not limited to a columnar shape but may be a prismatic shape or the like.

  In addition, a pipe 27 extending in a predetermined length is disposed in the upper part of the filter plate 30 along the width direction, and a plurality of through holes (not shown) provided in the pipe 27 are located in the respective filtration chambers R. It is like that. A distribution pipe 25 connected to the upper side wall of the filtrate storage tank 16 is connected from a predetermined position of the pipe 27, and the distribution pipe 25 protrudes from the upper edge of the filter plate 30. Eyelets 38 made of an annular ring are attached to the upper and lower edges of the filter plate 30 at a predetermined interval.

  The filter plate 30 having the above structure is attached to a support bar 40 disposed above the filter plate 30, and is supported in the filter tank 10 via the support bar 40. A support bar 41 having substantially the same shape as the support bar 40 is disposed below the filter plate 30. Each of the support rods 40 and 41 has basically the same shape, and has a prismatic shape that extends substantially the same length as the width of the filter plate 30.

  As shown in FIG. 1, the upper support bar 40 is supported and fixed to the inner wall of the filtration tank 10 by predetermined fixing means 42. As the fixing means 42 in this embodiment, as shown in FIG. 1 (b), a pair of guide plates 42 a, 42 a protruding at a predetermined interval on the inner surface of the filtration tank 10, and both sides of the upper support rod 40. The engaging plate 42c is attached to the upper surface of the extending member 42b extending from the guide plate 42a and is wider than the distance between the guide plates 42a and 42a. Then, by inserting the upper support bar 40 between the guide plates 42a and 42a, the engagement plate 42c is engaged with the guide plates 42a and 42a so that the upper support bar 40 is supported. Yes.

  A plurality of semicircular hooks 47 are fixed to the lower surface of the upper support bar 40. Then, the connecting member 49 such as a shackle is connected to the hook 47 of the support bar 40 and the eyelet 38 at the upper edge of the filter plate 30, so that the filter plate 30 is suspended and supported by the upper support bar 40. . In addition, an insertion hole 45 through which the distribution pipe 25 protruding from the upper edge portion of the filter plate 30 is inserted is provided at a predetermined position of the support bar 40. The connection member 49 is not particularly specified and may be any member that can withstand the load when the filter plate 30 is suspended. Moreover, it is preferable that the connection member 49 can make the gap between the upper and lower edges of the filter cloth 34 and the support rods 40 and 41 as small as possible.

  On the other hand, the lower support bar 41 has a plurality of hooks 47 fixed on the upper surface thereof, and a connecting member 49 connected to the eyelet 38 at the lower edge of the filter plate 30 is connected to the lower support bar 41, thereby A support bar 41 is suspended and supported at the lower edge of 30. Further, the lower support bar 41 is formed with a weight capable of being pulled to such an extent that large wrinkles cannot be formed on the flat portion of the filter cloth 34. That is, when the filter plate 30 is suspended and supported in the filter tank 10, buoyancy is applied to the filter cloth 34, and the weight is such that the filter cloth 34 can be pulled downward against this buoyancy. As a result, the filter cloth 34 is stretched and supported by the weight of the lower support bar 41 while preventing wrinkles and slack.

  Opening portions 43 into which the upper and lower ends of the guide rod 50 are inserted are respectively provided on the left and right sides of the upper and lower support rods 40 and 41. The opening 43 is formed with a predetermined width along the length direction of the support rods 40 and 41. Thereby, as shown in FIG. 3, each guide bar 50 is held in a slidable state by a predetermined distance along the length direction of the support bar 40. That is, after the water in the sludge is filtered and removed by the filter plate 30, air is sent into the filter plate 30 in order to wipe off the sludge adhering to the filter cloth 34. As a result, FIG. ), Each filter chamber R expands, and the entire filter cloth 34 expands greatly. At this time, if the guide rods 50 that support both sides of the filter cloth 34 are left fixed, an excessive tensile force acts on both sides of the filter cloth 34, which is not preferable. Therefore, when the filter cloth 34 is inflated, it is configured to allow the inward movement of both side portions (movement in the direction in which the guide bars 50 are close to each other).

  As described above, the filter plate 30 is stretched and supported by the lower support bar 41 attached to the lower edge thereof, and the upper support bar 40 is fixed to the inner wall of the filtration tank 10 by the fixing means 42. It is fixed and is supported in the filtration tank 10 by being arranged in parallel at a predetermined interval with the plane portion in the vertical direction.

  Next, a method for concentrating sludge using a sludge concentrator using the filter plate support structure will be described.

  First, the sludge supply / discharge valve V1 is opened, the sludge supply / discharge pump P is operated, and the sludge (unconcentrated sludge) to be dehydrated is placed above the filter plate 30 disposed in the filter tank 10. Supply everything. Then, the water supply valve V3 is opened, and the distribution pipe 25, the filtrate storage tank 16, and the filtrate discharge pipe 20 are filled with water. When the water level in the filtrate storage tank 16 rises to a predetermined value, the water supply valve V3 is closed, the water supply to the filtrate storage tank 16 is stopped, and the extraction valve V4 is opened.

  If it does in this way, the negative pressure according to the length of the filtrate discharge pipe | tube 20 will act on each filtration chamber R inside the filter plate 30 by the siphon effect. Thereby, the water containing unconcentrated sludge in contact with the filter cloth 34 is sucked into the filtration chamber R while being filtered by the filter cloth 34, and the pipe 27 disposed on the upper part of the filter plate 30 and the distribution pipe 25 connected thereto are provided. The filtrate is supplied to the filtrate storage tank 16. In this way, moisture can be filtered out from the unconcentrated sludge. Further, sludge from which moisture has been removed (concentrated sludge) is deposited on the surface of the filter cloth 34.

  At this time, the filter cloth 34 is pulled by the weight of the support bar 41 attached to the lower edge thereof, and is prevented from moving in the width direction by the guide bar 50 inserted and supported on both sides. Therefore, the slack of the filter cloth 34 can be prevented when sludge adheres to the filter cloth 34 and the filter cloth 34 itself stretches and deforms. Further, since the slack of the filter cloth 34 is prevented, it is possible to reliably prevent the adjacent filter cloths 34 from adhering to each other and the filtration area of the filter cloth 34 from being reduced.

  Further, the filter cloth 34 is stretched and supported by the weight of the lower support bar 41, and both sides thereof are supported by the guide bar 50, so that the conventional filter plate fixing method shown in FIG. In addition, it is not necessary to support the periphery of the fixed frame 1 and the elastic member 3. Therefore, a wide space for support around the filter plate 30 is not required, so that the filtration area of the filter cloth 34 can be increased.

  More specifically, in the conventional fixing method shown in FIG. 8, the length of the elastic member 3 is about 50 mm. On the other hand, in this support structure of the filter plate, this portion can be utilized to the maximum extent as the filter area of the filter cloth 34. For example, conventionally, if the filter cloth 34 is 1000 mm square, the filter cloth 34 can be expanded by 50 mm vertically and horizontally, so that the filter cloth can be 1100 mm square. Moreover, since the filtration area by the filter cloth 34 exists in both front and back surfaces of the support body 32, after all, the filtration area F1 in this support structure is 1100 × 1100 × 2 (mm). On the other hand, since the filtration area F2 in the conventional case is 1000 × 1000 × 2 (mm), this support structure provides a filtration area 1.21 times (F1 / F2) that of the conventional case. As described above, since a large filtration area can be secured by the single filtration plate 30, the filtration area as a whole can be increased and the efficiency of the filtration process can be improved.

  After performing the above filtration process for a predetermined time, the sludge supply / discharge valve V1 is opened, the sludge (unconcentrated sludge) is drawn out of the system of the filtration tank 10, and the extraction valve V4 is closed. Thereafter, the air inflow valve V5 is opened, and compressed air from the compressor C is blown into the filter chambers R of the filter plate 30 through the distribution pipe 25 and the pipe 27, thereby inflating the filter cloth 34, and the surface of the filter cloth 34 The concentrated sludge deposited and deposited on the surface can be peeled off.

  At this time, as described above, the filter cloth 34 is stretched from the support bar 41, and both sides thereof are supported by the guide bars 50, and the movement thereof is prevented. Even if it is inflated, the filter cloth 34 can be prevented from flapping.

  Further, in the step of removing the sludge from the filter cloth 34 by air, as shown in FIG. 3B, each filter chamber R is inflated by the air, and the entire filter cloth 34 is greatly inflated. However, at this time, the guide bars 50 that support both sides of the filter cloth 34 are slidably disposed in the openings of the upper and lower support bars 40 and 41, and are a predetermined distance from each of the support bars 40 and 41. It is arranged so that it can move. Therefore, since the filter cloth 34 is allowed to swell to some extent (see FIG. 3B), it is possible to prevent an excessive tensile force from being applied to the filter cloth 34 and to remove the sludge adhered and deposited on the surface of the filter cloth 34. It becomes easy to be done.

  Then, the concentrated sludge peeled off from the filter cloth 34 is discharged out of the filtration tank 10 by opening the sludge discharge valve V2.

  FIG. 4 shows a second embodiment of the filter plate support structure according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In this support structure, the support form on both sides of the filter cloth 34 is different from the above embodiment. That is, both sides of the filter cloth 34 are supported by the suction pipes 52 connected to the filtrate storage tank 16. The suction pipe 52 includes a vertical pipe 52a that extends in the vertical direction and is disposed on both sides of the filter cloth 34, and a horizontal pipe 52b that extends perpendicularly from the lower end of the vertical pipe 52a. , 52b are arranged so that the tip portions thereof face each other. A suction port (not shown) is formed in the horizontal pipe 52 b, and the suction port is positioned in each filtration chamber R defined in the filter plate 30.

  And according to this embodiment, the filter cloth 34 is pulled by the weight of the lower support bar 41 and the filter cloth 34 by the suction pipes 52 inserted into both sides of the filter cloth 34, as in the previous embodiment. Is prevented, fluttering of the filter cloth 34 and slack of the filter cloth 34 during the sludge peeling process are prevented, and a reduction in the filtration area is prevented. In addition, since a large space for supporting the filter plate 30 is not required, the filtration area can be increased. Further, the suction tube 52 can be used as a guide rod for supporting both sides of the filter cloth 34, and suction ports of the suction tube 52 can be provided at a plurality of locations.

FIG. 5 shows a reference example for understanding the support structure of the filter plate according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In this support structure, both sides of the filter cloth 34 are not supported as in the first and second embodiments, and both sides of both ends in the length direction of the support bar 41 attached to the lower edge of the filter cloth 34 are supported. A protrusion 54 having a predetermined height is projected from the surface. As shown in FIG. 5 (b), when the projecting portion 54 comes into contact with the support bar 41 of the adjacent filter plate 30, a predetermined distance S is formed.

According to this reference example , the filter cloth 34 is pulled by the weight of the support bar 41, and the protrusions 54 and 54 of the adjacent support bars 41 come into contact with each other as shown in FIG. Accordingly, the movement of the filter cloth 34 is prevented, and fluttering of the filter cloth 34 and slack of the filter cloth 34 during the sludge peeling process are prevented. In addition, since the spacing between the filter plates 30 is maintained at a predetermined distance or more by the protruding portion 54 of the support bar 41, even when the filter cloth 34 is loosened, the adjacent filter cloths 34 stick to each other and the filtration area decreases. Can be prevented.

In this reference example , the protrusions 54 and 54 protrude from both side surfaces of both ends in the length direction of the support bar 41. However, the protrusions 54 may protrude only from one side, and adjacent support bars A distance S of a predetermined distance may be formed between 41 and 41.

FIG. 6 shows a third embodiment of the support structure for the filter plate according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

In this embodiment, the configuration of the reference example is added to the configuration of the first embodiment. That is, both sides of the filter cloth 34 are inserted and supported by the guide rods 50, and the protruding portions 54 are projected from both side surfaces of both ends of the support rod 41 attached to the lower edge portion thereof. In this embodiment, the effects of both the first embodiment and the reference example can be obtained.

FIG. 7 shows a fourth embodiment of the support structure for the filter plate according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

In this embodiment, the configuration of the reference example is added to the configuration of the second embodiment. In other words, both sides of the filter cloth 34 are supported by the suction pipe 52, and the protrusions 54 are provided so as to protrude from both side surfaces of both ends of the support bar 41 attached to the lower edge portion thereof. In this embodiment, the effects of both the second embodiment and the reference example can be obtained.

(A) is a schematic block diagram of the sludge concentration processing apparatus using the support structure of the filter plate of this invention, (b) is explanatory drawing which shows the attachment state at the time of attaching a filter plate inside the process device. is there. 1st Embodiment of the support structure of the same filter plate is shown, (a) is a schematic block diagram, (b) is sectional drawing in the AA arrow line of (a). The operation | movement at the time of removing the sludge adhering to the filter cloth of the support structure of the filter plate is shown, (a) is a 1st operation | movement figure, (b) is a 2nd operation | movement figure. It is a schematic block diagram which shows 2nd Embodiment of the support structure of the filter plate of this invention. The reference example for understanding the support structure of the filter plate of this invention is shown, (a) is a schematic block diagram, (b) is the effect | action explanatory drawing. It is a schematic block diagram which shows 3rd Embodiment of the support structure of the filter plate of this invention. It is a schematic block diagram which shows 4th Embodiment of the support structure of the filter plate of this invention. It is explanatory drawing which shows the support structure of the conventional filter plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed frame 3 Elastic member 10 Filtration tank 12 Sludge supply pipe 14 Concentrated sludge extraction pipe 16 Filtrate storage tank 18 Water supply pipe 20 Filtrate discharge pipe 22 Air inflow pipe 25 Distribution pipe 26 Pipe 27 Pipe 30 Filter plate 32 Support body 34 Filter cloth 36 , 36a Seam 37 Guide support portion 38 Eyelet 40, 41 Support rod 42 Fixing means 42a Guide plate 42b Extension member 42c Engagement plate 43 Opening portion 45 Insertion hole 47 Hook 49 Connection member 50 Guide rod 52 Suction tube 52a Vertical tube 52b Horizontal tube C Compressor P Sludge supply / discharge pump R Filtration chamber S Interval V1 Sludge supply / discharge valve V2 Sludge discharge valve V3 Water supply valve V4 Extraction valve V5 Air inflow valve

Claims (3)

The outer periphery of the support is covered with a filter cloth formed in the shape of a bag, and a plurality of filter plates having a filter chamber as an inside of the filter cloth are supported in parallel in a filter tank with a plane portion directed in the vertical direction at a predetermined interval. In the support structure of the filter plate,
A support bar is attached to the upper and lower edges of the filter cloth, and the filter cloth is stretched and supported by the weight of the support bar attached to the lower edge part, and arranged vertically on both sides of the filter cloth. A support structure for a filter plate, wherein the guide bar is inserted and the upper and lower ends of the guide bar are slidably held along the support bar by a predetermined distance. Claims wherein the guide rod is made from the suction tube, the suction opening of the suction pipe is arranged inside the filter cloth was held slidably by a predetermined distance lower end portion on the suction pipe along said support rod Item 2. A support structure for a filter plate according to Item 1 . The protrusion part which forms the space | interval of predetermined distance is provided in the both ends of the support bar attached to the lower edge part of the said filter cloth, when it contact | abuts with the support bar of an adjacent filter plate . Support structure for the filter plate.

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