JP2018192431A - Solid-liquid separator, and solid-liquid separation method for solid-liquid mixture - Google Patents

Abstract

To provide a solid-liquid separator capable of easily, inexpensively separating massively-generating solid-liquid mixture using a simple equipment.SOLUTION: There is provided a solid-liquid separator for removing a liquid from a solid-liquid mixture. The separator comprises: a filter cloth through which the liquid penetrates; an outer cylinder placed to clog a lower end opening on the surface of the filter cloth and receiving the solid-liquid mixture fed intrad; a pressing plate housed in the outer cylinder and having the bottom face contacting the surface of the solid-liquid mixture fed in the outer cylinder; a pressing plate-moving instrument moving the pressing plate in an axial direction of the outer cylinder; and an outer cylinder lift implement hoisting and lowering the outer cylinder.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a solid-liquid separation apparatus for separating a solid and a liquid from a solid-liquid mixture and a solid-liquid separation method for the solid-liquid mixture.

  The turbid water discharged in civil engineering works contains a lot of suspended solids (SS), so when discharging these turbid water into rivers, a muddy water treatment plant is implemented to treat the target water quality. Examples of muddy water treatment facilities include a natural precipitation method in which a sedimentation basin is provided in the construction site to allow natural precipitation, or after adding a flocculant to muddy water and coagulating with thickener, the treated water is discharged, and the coagulated sediment sludge is precipitated.・ Various treatment methods have been developed, such as a dewatered cake to be processed into a cake and sent to a soil disposal site.

  When implementing these muddy water treatment works, an appropriate treatment method is adopted according to the nature of muddy water to prevent deterioration of river water quality. And in the civil engineering work, the muddy water discharged by the dam construction and the earth work contains a lot of soil particles, and therefore, in general, the mechanical precipitation method is often adopted. However, not only does the muddy water treatment facility become large-scale and the treatment cost becomes high, but also the use of a flocculant makes the dehydrated cake transported to the landfill an industrial waste, and the treatment cost is also high.

  Under such circumstances, a processing method using a solid-liquid separation apparatus has been studied as a method that is inexpensive and does not use a flocculant. For example, the solid-liquid separation device disclosed in Patent Document 1 performs vacuum suction from the lower side of the filtration unit with respect to the filtration unit to which the solid-liquid mixture is supplied on the upper surface and the solid-liquid mixture supplied to the filtration unit. A vacuum tray, a pressurizing means for supplying a pressure fluid from the upper side of the filtration unit to the solid-liquid mixture supplied to the filtration unit, and a liquid substance that is disposed below the filtration unit and separated from the solid-liquid mixture is recovered. Recovery means.

  The solid-liquid mixture supplied to the surface of the filtration unit is pressurized with a pressurized fluid from the upper side and evacuated from the lower side to separate the solid-liquid mixture into a solid substance and a liquid substance. . The solid substance thus separated is dehydrated and dried, and is removed from the filtration unit by a scraper and collected. On the other hand, the liquid material is collected and collected by a collecting means installed below the filtration unit.

JP 2006-297366 A

  As described above, the device of Patent Document 1 pressurizes the surface side of the solid-liquid mixture with the pressure fluid so as to apply an equal pressing force to the solid-liquid mixture in the vertical direction, and on the lower surface side of the solid-liquid mixture. Negative pressure is applied by evacuation. For this reason, both the equipment for supplying pressurized fluid and the equipment for evacuating must be equipped, and the apparatus tends to be large.

  In addition, since the processing cost becomes high and the operation becomes complicated, the apparatus of Patent Document 1 is not necessarily suitable for processing a large amount of muddy water generated in civil engineering work as a solid-liquid mixture. It is not a means.

  The present invention has been made in view of such a problem, and its main purpose is that a solid-liquid mixture generated in large quantities can be easily and inexpensively separated into a solid and a liquid with simple equipment. It is to provide a solid-liquid separator.

  In order to achieve this object, a solid-liquid separation device of the present invention is a solid-liquid separation device that removes liquid from a solid-liquid mixture in which a liquid and a solid are mixed. An outer cylinder that is placed so that the lower end opening is closed by the surface, and the solid-liquid mixture is supplied inward, and the solid-liquid mixture that is housed in the outer cylinder and supplied into the outer cylinder And a pressing plate moving instrument that moves the pressing plate in the axial direction of the outer cylinder, and an outer cylinder lifting instrument that moves the outer cylinder up and down.

  According to the solid-liquid separation device of the present invention described above, the outer cylinder placed on the surface of the filter cloth and the pressing plate moving in the axial direction of the outer cylinder in the outer cylinder behave like a piston cylinder structure. Indicates. As a result, when the pressing plate is moved downward in the axial direction of the outer cylinder via the pressing plate moving device, the axial direction of the outer cylinder and the axial orthogonal direction of the entire solid-liquid mixture supplied into the outer cylinder are pressed. While applying pressure, the solid-liquid mixture can be forcedly dehydrated by pressing it against the filter cloth.

  For this reason, compared with the method of applying a pressing force to a solid-liquid mixture with a pressurized fluid or the method of applying a negative pressure by evacuation, the solid-liquid mixture is easily and inexpensively used with simple equipment. It becomes possible to perform a solid-liquid separation process that separates into a solid.

  In addition, when treating turbid water generated by dam construction or earth work as a solid-liquid mixture, a conventional sedimentation basin for implementing a natural sedimentation system or a large scale for implementing a mechanical treatment sedimentation system. Large-scale muddy water treatment facilities are not required. For this reason, it is not necessary to secure a site for providing these facilities in the construction site, the site can be used effectively, and the equipment cost and work cost can be greatly reduced.

  In addition, even when fine particles are contained in the solid-liquid mixture, the fine particles can be easily separated from the solid-liquid mixture as a solid simply by adjusting the opening and thickness of the filter cloth. While greatly reducing the processing time for liquid separation, it is possible to treat the liquid separated from the solid-liquid mixture to a water quality that can be discharged into the river.

  The solid-liquid separation device of the present invention includes a plurality of combinations of the filter cloth, the outer cylinder, the pressing plate, the pressing plate moving instrument, and the outer cylinder lifting / lowering instrument, and the plurality of outer cylinders, It is characterized by comprising a solid-liquid mixture supply pipe provided with a distribution means for distributing and supplying the solid-liquid mixture.

  According to the solid-liquid separation apparatus of the present invention, since the solid-liquid mixture can be subjected to the solid-liquid separation process for each combination described above, a large amount of the solid-liquid mixture can be processed. Moreover, a solid-liquid mixture can be supplied by operating the distribution means of the solid-liquid mixture supply pipe while providing a time difference with respect to each combination of outer cylinders. As a result, the solid-liquid separation process can be continuously performed while constantly supplying the solid-liquid mixture to any of the plurality of outer cylinders, and a larger amount of the solid-liquid mixture can be efficiently performed without requiring complicated work. It becomes possible to process well.

  In the solid-liquid separation device of the present invention, an air hole is provided in the pressing plate, and a check valve for preventing leakage of the solid-liquid mixture supplied to the outer cylinder is provided in the air hole. It is characterized by.

  According to the solid-liquid separation device of the present invention, after the solid-liquid mixture is forcibly dehydrated and separated into liquid and solid, before the outer cylinder is separated from the filter cloth, the pressing plate is removed from the outer cylinder via the pressing plate moving device. By moving in the axial direction, air can be introduced between the pressing plate and the solid through the air holes. As a result, the edges of the pressing plate and the solid are cut, and when the outer cylinder is cut off from the filter cloth, the solid is reliably left on the filter cloth, so that these solids can be efficiently recovered.

  In the solid-liquid separation device of the present invention, the filter cloth is formed on an endless belt having a contact surface with the outer cylinder on the surface, and the filter cloth is rotated in the longitudinal direction with the filter cloth stretched. A rotation drive mechanism is provided.

  According to the solid-liquid separation device of the present invention, the filter cloth can function as a conveyor belt of the belt conveyor device via the filter cloth rotation drive mechanism. Therefore, the solid remaining on the surface of the filter cloth by the solid-liquid separation process can be easily processed without human intervention.

  Therefore, in addition to the operation of the filter cloth rotation drive mechanism, the solid-liquid separation device is provided with a control mechanism for automatically controlling the operation of the distribution means provided in the pressing plate moving device, the outer cylinder lifting device, and the solid-liquid mixture supply pipe. From the work of placing the outer cylinder on the surface of the filter cloth, the work of supplying muddy water into the outer cylinder, the work of collecting the liquid by applying a pressing force to the muddy water with the pressing plate, It becomes possible to automate the work related to the solid-liquid separation process until the work of separating the outer cylinder and the pressing plate from the cloth and recovering the solid is reached.

  In the solid-liquid separation method of the solid-liquid mixture using the solid-liquid separation device of the present invention, the outer cylinder is placed on the surface of the filter cloth using the outer cylinder lifting device, and the inner cylinder is placed inside the outer cylinder. After supplying the solid-liquid mixture, a pressing force is applied to the solid-liquid mixture by moving the pressing plate in the axial downward direction of the outer cylinder using the pressing plate moving instrument, and the solid-liquid mixture is It is characterized by being separated into a liquid and a solid.

  According to the solid-liquid separation method of the solid-liquid mixture using the solid-liquid separation apparatus of the present invention, by moving the pressing plate in the lower direction of the axis of the outer cylinder, the solid-liquid mixture supplied into the outer cylinder, The solid-liquid mixture can be pressed against the filter cloth while applying the pressing force in the axial direction and the orthogonal direction of the outer cylinder. As a result, the solid-liquid mixture can be forcibly dehydrated easily and separated into a liquid and a solid by simply continuing to apply a pressing force to the solid-liquid mixture until no liquid permeating from the filter cloth can be confirmed. Become.

  According to the present invention, when the pressing plate is moved via the pressing plate moving device, the pressing force in the axial direction and the axial orthogonal direction of the outer cylinder is applied to the entire solid-liquid mixture supplied into the outer cylinder. In addition, the solid-liquid mixture can be pressed against the filter cloth, and the solid-liquid separation process can be performed easily and inexpensively with simple equipment.

It is a figure which shows the detail of the solid-liquid separator in embodiment of this invention. It is a figure which shows the frame of the solid-liquid separator in embodiment of this invention. It is a figure which shows the press plate of the solid-liquid separator in embodiment of this invention. It is a figure which shows the other example of the press plate of the solid-liquid separator in embodiment of this invention. It is a figure which shows the solid-liquid separation method using the solid-liquid separation apparatus in embodiment of this invention (the 1). It is a figure which shows the solid-liquid separation method using the solid-liquid separation apparatus in embodiment of this invention (the 2). It is a figure which shows the solid-liquid separation method using the solid-liquid separation apparatus in embodiment of this invention (the 3). It is a figure which shows the other example of the solid-liquid separator in embodiment of this invention.

  The solid-liquid separation device of the present invention forces a solid-liquid mixture by applying a pressing force to a solid-liquid mixture in which a liquid and a solid are mixed using a device that moves in a vertical direction that forms a piston cylinder structure. It is an apparatus for performing solid-liquid separation processing that dehydrates and separates liquid and solid.

  In the present embodiment, turbid water generated by dam construction or earth work is taken as an example as the solid-liquid mixture, and referring to FIGS. 1 to 8, the solid-liquid separation device and the solid-liquid mixture using the solid-liquid separation device are solidified. The liquid separation method will be described in detail below. In addition, as long as the solid-liquid mixture used as the object of a solid-liquid separation process is a mixture which can be isolate | separated into a liquid and a solid by applying a pressing force, any substance can be employ | adopted.

  As shown in FIG. 1, the solid-liquid separator 1 includes a filter cloth 2 through which a liquid L separated from the solid-liquid mixture M permeates, a cylindrical outer cylinder 3 placed on the surface of the filter cloth 2, an outer A pressing plate 4 housed inside the tube 3 and a pressing plate moving device 5 for moving the pressing plate 4 in the axial direction of the outer tube 3 are provided.

  The filter cloth 2 is made of a filter material in which a nonwoven fabric 21 and a filtration membrane 22 having a smaller opening than the nonwoven fabric 21 are laminated. Both the nonwoven fabric 21 and the filtration membrane 22 have a particle size of the solid S contained in the solid-liquid mixture M. Accordingly, the openings are set appropriately. The outer shape is formed into an endless belt and is stretched around the filter cloth rotation drive mechanism 6.

  The filter cloth rotation drive mechanism 6 includes at least a head pulley 61, a tail pulley 62, a tension pulley 63, and a vent pulley 64, and rotates the filter cloth 2 in the longitudinal direction like a so-called belt conveyor device. It has a configuration that can. Thereby, the filter cloth 2 becomes a mode which functions like the conveyor belt of a belt conveyor apparatus.

  Thus, the filter cloth 2 that functions like a conveyor belt is on the carrier side 6a of the conveyor belt in the range of movement from the tail pulley 62 to the head pulley 61, and in the range of movement from the head pulley 61 to the tail pulley 62, It becomes the return side 6b of the belt. And the outer cylinder 3 is mounted in the range of the carrier side 6a in the filter cloth 2. FIG.

  The outer cylinder 3 is formed of a cylindrical body having an upper end portion 31 and a lower end portion 32 opened. An outer cylinder lifting / lowering device 7 for placing or separating the outer cylinder 3 on the filter cloth 2 is installed on the upper end portion 31. Has been. The outer cylinder lifting / lowering device 7 is composed of a hydraulic cylinder type expansion / contraction device provided with a grip portion 72 for gripping the outer cylinder 3 at the tip 71, and is arranged so as to straddle the filter cloth 2 in the width direction as shown in FIG. The base end 73 is installed on the frame body 8 so as to be in a posture of hanging from the frame body 8. As a result, the outer cylinder 3 is placed on the surface of the filter cloth 2 by the extension of the outer cylinder elevating instrument 7, and is separated from the filter cloth 2 by the shortening of the outer cylinder elevating instrument 7.

  Further, as shown in FIG. 1, the outer cylinder 3 is provided with a supply hole 33 for filling muddy water M inside the outer cylinder 3 on the side peripheral surface thereof. A solid-liquid mixture supply pipe 9 for supplying M is connected. Furthermore, a pressing plate 4 connected to the pressing plate moving instrument 5 is accommodated inside the outer cylinder 3.

  The pressing plate 4 is formed of a plate material having a shape similar to the cross section of the hollow portion of the outer cylinder 3, and an interposition member 41 is mounted on the outer peripheral surface. The interposing member 41 closes the gap between the inner peripheral surface of the outer cylinder 3 and the outer peripheral surface of the pressing plate 4, and in this embodiment, as shown in FIG. The compressor ring that is generally known as a member that closes the gap between the piston and cylinder is used.

  Further, the bottom surface of the pressing plate 4 is formed so as to be in uniform contact with the surface of the muddy water M filled in the outer cylinder 3, and the pressing plate 4 is disposed on the upper surface of the pressing plate 4 in the axial direction of the outer cylinder 3. A pressing plate moving instrument 5 for freely moving is installed.

  As shown in FIG. 1, the pressing plate moving instrument 5 is a hydraulic cylinder type expansion / contraction device in which a distal end 51 is fixed to the upper surface of the pressing plate 4, and a base end 52 is arranged so as to hang from the frame body 8. It is installed on the frame 8. Thereby, the pressing plate 4 moves in the axial direction of the outer cylinder 3 by shortening the pressing plate moving instrument 5, and moves in the lower direction of the axial line of the outer cylinder 3 by extension of the pressing plate moving instrument 5.

  Thus, the pressing plate 4 and the outer cylinder 3 move relative to each other in the vertical direction of the axis of the outer cylinder 3 like a piston cylinder structure. Accordingly, when the outer cylinder 3 is placed on the surface of the filter cloth 2, muddy water M is filled inside the outer cylinder 3 and the pressing plate 4 is moved downward in the axis line of the outer cylinder 3. The turbid water M can be pressed against the filter cloth 2 and forcedly dehydrated while applying a pressing force in the axial direction and the orthogonal direction of the outer cylinder 3 to M.

  Therefore, by continuing to apply the pressing force to the turbid water M until the liquid L permeating from the filter cloth 2 cannot be confirmed, it is compared with the case where the pressing force is applied by the pressurized fluid or the negative pressure is applied by evacuation. Thus, the turbid water M can be separated into the liquid L and the solid S easily and inexpensively with simple equipment. The separated liquid L passes through the filter cloth 2 and the solid S is left on the surface of the filter cloth 2 in a cake-like or slime-like manner.

  By the way, as shown in FIG. 1, when the pressing plate moving device 5 is extended and the pressing plate 4 is moved downward in the axial direction of the outer cylinder 3, the filter cloth 2 is stretched around the filter cloth rotation drive mechanism 6. However, it will be in a state where bending is likely to occur. Therefore, in the present embodiment, the support plate 10 is disposed at a height position in contact with the back surface of the filter cloth 2 to prevent the filter cloth 2 from being bent.

  In this embodiment, as shown in FIG. 2, so-called porous metal in which a plurality of through holes are provided in a metal plate is used as the support plate 10, and this is installed in a plate installation portion 83 provided in the frame 8. doing. The plate installation portion 83 may have any shape as long as it does not block all of the plurality of through holes formed in the support plate 10, but in the present embodiment, the plurality of horizontal members are formed in a ladder shape. Assembling, this is installed in the column member 81 of the frame 8.

  Further, below the plate installation portion 83 in the frame body 8, liquid separated from the turbid water M supplied to the inside of the outer cylinder 3 and permeated through the filter cloth 2, and then the liquid passed through the support plate 10 and the plate installation portion 83. A liquid receiving member 11 for collecting L is installed.

  In the present embodiment, the liquid receiving member 11 is formed in a bowl shape so that the liquid L separated from the turbid water M flows down in the width direction of the filter cloth 2, but is not necessarily limited thereto. Any shape such as a funnel shape or a tank shape for storing the liquid L may be used. On the other hand, as shown in FIG. 1, the solid recovery area 12 is provided in the vicinity of the tip of the carrier side 6a in the filter cloth 2, that is, in the vicinity of the side where the head pulley 61 of the filter cloth rotation drive mechanism 6 is located.

  Further, in the vicinity of the base end of the return side 6b in the filter cloth 2, that is, in the vicinity of the vent pulley 64 for returning the filter cloth 2 that has passed through the head pulley 61 to the tail pulley 62, the solid S adhering to the surface of the filter cloth 2 is removed. A cutting edge 13 to be peeled off is provided. Further, in the middle of the return side 6b of the filter cloth 2, that is, in the middle from the vent pulley 64 located near the cutting edge 13 to the tail pulley 62, the solid S adhering to the surface of the filter cloth 2 is removed by high-pressure water. A cleaning high washer 14 is installed.

  In the present embodiment, a filter material including the nonwoven fabric 21 and the filtration membrane 22 is employed as the filter cloth 2, but is not necessarily limited to this, and only the nonwoven fabric 21 is selected according to the particle size of the solid S. It may be adopted.

  Further, the solid S separated from the muddy water M is in a state of being firmly pressed against the surface of the filter cloth 2 in a cake-like or slime-like manner. Therefore, when the non-woven fabric 21 whose surface is smoothed by special heat treatment and fuzz is suppressed is adopted, the solid S can be easily recovered from the non-woven fabric 21.

  On the other hand, the solid S separated from the muddy water M is in a state of being firmly pressed against the pressing plate 4. Therefore, as shown in FIG. 4A, when the air hole 42 is provided in the pressing plate 4 and the pressing plate 4 is moved in the axial direction of the outer cylinder 3 through the pressing plate moving device 5, As shown in FIG. 4B, a structure in which air can flow between the pressing plate 4 and the solid S may be adopted.

  If it carries out like this, since the edge of the press board 4 and the solid S can be cut | disconnected, the solid S can be made to leave the filter cloth 2 reliably. In this case, although air flows between the pressing plate 4 and the solid S, the turbid water M or the solid S filled in the space does not leak out through the air holes 42. A check valve 43 may be provided in the air hole 42.

  Further, the frame body 8 installed so that the outer cylinder lifting device 7 and the pressing plate moving device 5 hang down is constructed in a ramen structure having a column member 81 and a beam member 82 made of steel as shown in FIG. doing. However, the structure is not limited to this. The load when the outer cylinder 3 is moved up and down by the outer cylinder lifting device 7 or the pressing plate 4 is moved downward in the axis line of the outer cylinder 3 by the pressing plate moving device 5. Any structure may be used as long as it is strong enough to withstand the reaction force when it is moved toward.

  The usage method of the solid-liquid separation apparatus 1 of the structure mentioned above is shown below, referring FIGS.

  First, as shown in FIG. 5, the outer cylinder lifting / lowering device 7 is extended with respect to the outer cylinder 3 separated from the filter cloth 2, so that only the outer cylinder 3 is the surface of the filter cloth 2 and the carrier. Place in the range of the side 6a. Thereafter, as shown in FIG. 6, turbid water M is supplied to the inside of the outer cylinder 3 through the solid-liquid mixture supply pipe 9. Then, the pressing plate moving device 5 is extended until the bottom surface of the pressing plate 4 comes into contact with the surface of the muddy water M, and the pressing plate 4 is moved downward in the axis line of the outer cylinder 3.

  Alternatively, as shown in FIG. 5, the pressing plate moving device 5 and the outer tube lifting / lowering device 7 are both extended with respect to the outer cylinder 3 separated from the filter cloth 2, and the pressing plate 4 is accommodated. The outer cylinder 3 is placed on the surface of the filter cloth 2 on the carrier side 6a. Thereafter, as shown in FIG. 6, turbid water M is supplied to the inside of the outer cylinder 3 through the solid-liquid mixture supply pipe 9. Then, the pressing plate moving device 5 is extended until the bottom surface of the pressing plate 4 comes into contact with the surface of the muddy water M, and the pressing plate 4 is moved downward in the axis line of the outer cylinder 3. Alternatively, the muddy water M is filled inside the outer cylinder 3 until the muddy water M contacts the bottom surface of the pressing plate 4.

  In this case, when the pressing plate 4 is moved downward in the axis line of the outer cylinder 3, an air vent hole capable of closing the muddy water M so as not to leak out while extracting air inside the outer cylinder 3. It is provided on the upper part of the outer cylinder 3 or on the pressing plate 4.

  Next, as shown in FIG. 7, the pressing plate moving instrument 5 is extended, and the pressing plate 4 is further moved downward in the axial direction of the outer cylinder 3, and a pressing force is applied to the muddy water M. Then, the muddy water M is forcibly dehydrated, so that the separated liquid L passes through the filter cloth 2 and flows down to the liquid receiving member 11 via the support plate 10 and the plate setting portion 83.

  Here, in the present embodiment, a mesh filter having an opening of about 0.005 mm is employed for the filtration membrane 22 constituting the filter cloth 2. This is because the turbid water M generally includes soil particles of about 1 to 0.005 mm, so that the liquid L that has permeated the filter cloth 2 and flowed down to the liquid receiving member 11 is almost soil. It becomes fresh water without particles.

  As described above, even if the turbid water M contains fine particles that cannot be collected unless a mechanical precipitation method is conventionally used to perform coagulation precipitation with a coagulant, the fine particles are not allowed to pass through. It is possible to treat the liquid L separated from the turbid water M to a water quality that can be discharged into a river with a simple configuration in which the filter membrane 22 having openings is simply used for the filter cloth 2. In addition, the processing time for solid-liquid separation can be significantly reduced as compared with a method in which a mechanical precipitation method is used to perform coagulation precipitation.

  When the liquid L separated from the turbid water M cannot be confirmed to pass through the filter cloth 2 and flow down to the liquid receiving member 11, the pressing plate 4 is moved downward in the axis of the outer cylinder 3 by the pressing plate moving device 5. Stop the movement. Thereafter, when the air hole 42 is provided in the pressing plate 4, only the pressing plate 4 is moved by a desired height in the axial direction of the outer cylinder 3, and the solid S and the pressing plate are passed through the air hole 42. 4 and air is allowed to flow in between.

  Thereafter, the pressing plate moving device 5 and the outer tube lifting / lowering device 7 are shortened to raise the outer tube 3 in a state where the pressing plate 4 is stored, and the outer tube 3 is separated from the filter cloth 2. Then, since the solid S is reliably left on the filter cloth 2, the solid S can be recovered more efficiently.

  It is not always necessary to provide the air hole 42 in the pressing plate 4. In this case, the pressing plate moving device 5 and the outer cylinder lifting / lowering device 7 are shortened so that a gap that allows air to flow between the outer tube 3 and the filter cloth 2 in a state in which the pressing plate 4 is accommodated. Provide. Thereafter, only the pressing plate 4 is moved in the axial direction of the outer cylinder 3 by a desired height, and air is supplied from the gap described above between the solid S and the inner peripheral surface of the outer cylinder 3 and the pressing plate 4. Let it flow. Then, the pressing plate moving device 5 and the outer tube lifting / lowering device 7 may be further shortened to raise the outer tube 3 in a state where the pressing plate 4 is accommodated, and the outer tube 3 may be separated from the filter cloth 2.

  After the above operation is completed, the filter cloth rotation drive mechanism 6 is driven to rotate the filter cloth 2 in the longitudinal direction. Then, the solid S left on the carrier side 6 a on the surface of the filter cloth 2 moves to the head pulley 61 side of the filter cloth rotation drive mechanism 6 and falls to the solid recovery area 12.

  On the other hand, the filter cloth 2 after the solid S has fallen moves to the return side 6b via the vent pulley 64 for changing the direction toward the head pulley 61 and the tail pulley 62. At this time, the remainder of the solid S adhering to the surface is peeled off by the cutting edge 13, and the solid S on the surface is completely removed by the cleaning high washer 14 in the middle of the return side 6b. Thus, the filter cloth 2 whose surface has been cleaned passes through the tail pulley 62 and then moves to the carrier side 6a again.

  In this way, the filter cloth rotation drive mechanism 6 is configured to supply the muddy water M into the outer cylinder 3 from the step of installing the outer cylinder 3 on the surface of the filter cloth 2 and to press the muddy water M with the pressing plate 4. Then, the operation to be intermittently driven is continued until there is no turbid water M to be supplied to the outer cylinder 3 so as to stop for the time until the process of separating the outer cylinder 3 from the filter cloth 2.

  According to the method described above, a sedimentation basin for implementing a natural sedimentation method and a large-scale for implementing a mechanical sedimentation method, which were installed at construction sites such as dam construction and earth work where muddy water M is generated. No turbid water treatment equipment is required. For this reason, it is not necessary to secure a site for providing these facilities in the construction site, the site can be used effectively, and the equipment cost and work cost can be greatly reduced.

  At this time, if a flocculant is added to the turbid water M supplied to the outer cylinder 3 to precipitate the frog, the liquid L is easily separated when a pressing force is applied in the outer cylinder 3. Therefore, it is possible to shorten the work time related to the solid-liquid separation process. On the other hand, when no flocculant is used for the turbid water M supplied to the outer cylinder 3, the solid S separated from the turbid water M can be reused for embankment materials, etc. by drying in the sun, and industrial waste It is possible to reduce the amount of discharged materials and the processing cost.

  The solid-liquid separation device 1 of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the present embodiment, the filter cloth 2 is formed as an endless belt and is stretched around the filter cloth rotation drive mechanism 6 so as to be rotatable in the longitudinal direction. However, the present invention is not limited to this. For example, it may be simply laminated on the support plate 10. In this case, the solid S left on the surface of the filter cloth 2 may be collected manually.

  Further, as the outer cylinder lifting and lowering device 7 and the pressing plate moving device 5, a hydraulic cylinder type expansion / contraction device is adopted. However, as long as these devices have a telescopic configuration, an air-operated cylinder or a mechanical jack is used. Any device may be employed.

  Further, in the present embodiment, a compressor ring is employed as the interposed member 41 of the pressing plate 4 in order to form a gap between the inner peripheral surface of the outer cylinder 3 and the outer peripheral surface of the pressing plate 4 in a watertight structure. For example, a rubber packing such as an O-ring may be adopted.

  In addition, the gap between the inner peripheral surface of the outer cylinder 3 and the outer peripheral surface of the pressing plate 4 may not be completely sealed until a watertight structure is obtained as long as it is a member that can close the turbid water M so as not to leak. . In this case, as the interposing member 41 of the pressing plate 4, for example, a non-woven fabric formed in a ring shape or an outer peripheral surface of the pressing plate 4 as shown in FIG. It is recommended to use a nonwoven fabric. If it carries out like this, from the clearance gap between the inner peripheral surface of the outer cylinder 3, and the outer peripheral surface of the press plate 4, only clear water will leak as the liquid L isolate | separated from the muddy water M via the interposed member 41, and muddy water M will leak. There is nothing.

  In addition, when it is desired to process a large amount of turbid water M in the solid-liquid separator 1, the capacity of the outer cylinder 3 may be increased. However, in addition to the above configuration, as shown in FIG. Two combinations including the cloth 2, the outer tube 3, the pressing plate 4, the pressing plate moving device 5, and the outer tube lifting / lowering device 7 may be prepared.

  In this case, the above combination is arranged so that the two filter cloths 2 are arranged in parallel, and a switching valve 911 and two discharge ports 912 are provided as a distribution jig 91 for the solid-liquid mixture supply pipe 9. These discharge ports 912 are connected to the supply holes 33 of the two outer cylinders 3. In addition, the frame body 8 and the support plate 10 may be provided on each of the two filter cloths 2, but are prepared in a size capable of straddling the two filter cloths 2 in the width direction.

  The solid-liquid separation device 1 including two combinations including the filter cloth 2, the outer cylinder 3, the pressing plate 4, the pressing plate moving device 5, and the outer tube lifting / lowering device 7 is a solid-liquid separation process for each combination. Therefore, a large amount of turbid water M can be treated.

  Further, by operating the distribution means 91 of the solid-liquid mixture supply pipe 9, the turbid water M can be supplied with a time difference to the outer cylinder 3 of each combination. Thereby, by switching the switching valve 91 of the solid-liquid mixture supply pipe 9 at an appropriate timing, while always supplying the turbid water M to either of the two outer cylinders 3 provided in the solid-liquid separator 1, Solid-liquid separation processing can be carried out continuously. This makes it possible to efficiently process a larger amount of turbid water M without requiring troublesome work.

  The combination comprising the filter cloth 2, the outer cylinder 3, the pressing plate 4, the pressing plate moving device 5 and the outer tube lifting / lowering device 7 is not limited to two, depending on the amount of turbid water M to be treated, It is good also as a structure provided with three or more bodies.

  Moreover, although the switching valve 911 and the several discharge port 912 were provided as the distribution jig 91 in the solid-liquid mixture supply pipe 9, it is not necessarily limited to this. For example, as the distribution jig 91, a flexible pipe is interposed in the middle of the solid-liquid mixture supply pipe 9, a single discharge port is provided, and the discharge port is appropriately swung through the flexible pipe, whereby each of the plurality of outer cylinders 3. Alternatively, the turbid water M may be alternately supplied.

  Further, in addition to the operation of the filter cloth rotation drive mechanism 6, a control mechanism for automatically controlling the operation of the distribution means 91 provided in the pressing plate moving device 5, the outer cylinder lifting device 7 and the solid-liquid mixture supply pipe 9 is provided as a solid-liquid. When the separation apparatus 1 is provided, the solid-liquid separation process can be automated.

DESCRIPTION OF SYMBOLS 1 Solid-liquid separator 2 Filter cloth 21 Nonwoven fabric 22 Filtration membrane 3 Outer cylinder 31 Upper end part 32 Lower end part 33 Supply hole 4 Press plate 41 Interposition member 42 Air hole 43 Check valve 5 Press plate moving instrument 51 Tip 52 Base end 6 Filter cloth rotation drive mechanism 61 Head pulley 62 Tail pulley 63 Tension pulley 64 Vent pulley 6a Carrier side 6b Return side 7 Outer cylinder lifting tool 71 Tip 72 Grip part 73 Base end 8 Frame body 81 Column member 82 Beam member 83 Plate setting part 9 Solid-liquid mixture supply pipe 91 Distributing jig 911 Switching valve 912 Discharge port 10 Support plate 11 Liquid receiving member 12 Solid recovery area 13 Cutting edge 14 High washer for cleaning

M Turbid water (solid-liquid mixture)
L Liquid S Solid

Claims (5)

A solid-liquid separator for removing liquid from a solid-liquid mixture in which liquid and solid are mixed,
A filter cloth permeable to the liquid;
An outer cylinder that is placed so that the lower end opening is closed by the surface of the filter cloth, and the solid-liquid mixture is supplied inward;
A pressing plate housed in the outer cylinder and in contact with the surface of the solid-liquid mixture supplied into the outer cylinder;
A pressing plate moving device for moving the pressing plate in the axial direction of the outer cylinder;
An outer cylinder elevating device for elevating the outer cylinder;
A solid-liquid separation device comprising: The solid-liquid separator according to claim 1,
While including a plurality of combinations of the filter cloth, the outer cylinder, the pressing plate, the pressing plate moving instrument and the outer cylinder lifting instrument,
A solid-liquid separation device comprising a solid-liquid mixture supply pipe provided with a solid-liquid mixture supply pipe provided with a distribution means for distributing and supplying the solid-liquid mixture to each of the plurality of outer cylinders. In the solid-liquid separation device according to claim 1 or 2,
An air hole is provided in the pressing plate, and a check valve for preventing leakage of the solid-liquid mixture supplied to the outer cylinder is provided in the air hole. In the solid-liquid separation device according to any one of claims 1 to 3,
The filter cloth is formed on an endless belt having a contact surface with the outer cylinder on the surface,
A solid-liquid separation device comprising a filter cloth rotation drive mechanism for rotating the filter cloth in a longitudinal direction in a stretched state. A solid-liquid separation method of a solid-liquid mixture using the solid-liquid separation device according to any one of claims 1 to 4,
After placing the outer cylinder on the surface of the filter cloth using the outer cylinder lifting device, and after supplying the solid-liquid mixture to the inside of the outer cylinder,
By moving the pressing plate in the axial downward direction of the outer cylinder using the pressing plate moving instrument, a pressing force is applied to the solid-liquid mixture,
A solid-liquid separation method for a solid-liquid mixture, wherein the solid-liquid mixture is separated into a liquid and a solid.

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