JP2016140827A - Mud water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mud water treatment apparatus which can easily dissolve filter clogs.SOLUTION: A mud water treatment apparatus 1, configured of a slurry tank 2, a cylinder 3, a piston 4, a flocculant tank 5, a filter 32, a filter movement mechanism 6, a vibration sieve device 10 and the like, makes the slurry tank 2 mix mud water (slurry) containing silt and clay contents with a flocculant cast from the flocculant tank 5, the cylinder 3 extending in a horizontal direction below the slurry tank 2 of the mud water treatment apparatus 1, a lid part 31 being an on-off door that can be opened and closed by a horizontal method from a vertical direction, the piston 4 being nearly square with a plurality of nearly square metal plates stacked and fixed with bolts, the circumference of the piston 4 configured of a resin plate having flexibility, and the filter 32 being a continuous cloth-made belt having width in the horizontal directions of the cylinder 3, capable of turning, and cleaned by a filter cleaning mechanism.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a muddy water treatment apparatus, and more particularly, to a muddy water treatment apparatus that performs a filter press on a muddy water to dehydrate and take out a cake.

  Conventionally, a settling tank, a cylinder body of a cylinder device in which the bottom of the settling tank communicates with a central portion in the longitudinal direction, a piston that reciprocates in the cylinder body, and a piston rod of the piston are provided. Is composed of a filter that allows water to pass through, and the piston rod is known as a dehydrator connected to a rod drive device (see, for example, Patent Document 1). In this dehydrator, the piston partitions the inside of the cylinder body. When the pressure in the other region is higher than a predetermined value, a filtration membrane (filter) that allows water to pass therethrough is provided. Lid members having lid bodies that can be opened and closed are provided at both ends in the longitudinal direction of the cylinder body. The lid member includes a hollow guide portion through which the piston rod passes, and each of the hollow guide portions is provided with a lid opening / closing mechanism that opens and closes the end of the cylinder body. The rod drive device that drives the piston rod is provided with a load sensor, and includes a control device that receives the signal from the load sensor and controls the rod drive device and the lid opening / closing mechanism. When it is detected that the height is higher, the lid member is opened, and after a predetermined time for the piston to move to the side where the lid is opened, the lid member is closed.

Japanese Patent No. 5031118

  However, in the dehydrating apparatus described in Patent Document 1, since muddy water enters the cylinder, the filtration membrane (filter) is clogged with mud, the inside of the piston becomes high pressure, and the cylinder lid member may be removed. Moreover, in the dehydration apparatus described in Patent Document 1, since the stock solution stirring layer does not have a device for removing stones or concrete pieces, there is a problem in that muddy water containing stones or concrete pieces cannot be processed. .

  The present invention has been made to solve the above-described problems, and a first object is to provide a muddy water treatment apparatus that can easily eliminate clogging of a filter. Another object of the present invention is to provide a muddy water treatment apparatus that can relieve pressure when the inside of a piston becomes high pressure. The third object of the present invention is to provide a muddy water treatment apparatus capable of treating muddy water mixed with stones and concrete pieces.

  In order to achieve the above object, a muddy water treatment apparatus according to claim 1 includes a slurry tank into which muddy water and a flocculant are charged and mixed, a cylinder provided below the slurry tank, the slurry tank, and the slurry tank. A connecting portion for connecting the cylinder, a connecting portion opening / closing means for opening and closing the connecting portion, a lid portion provided at one end portion of the cylinder, and an inner surface side of the lid portion for passing water from the muddy water. A filter for filtering mud, a filter support portion provided on the inner surface side of the lid portion to movably support the filter, a drain outlet for discharging water that has passed through the filter to the outside, and the filter to the lid portion A filter moving mechanism that moves along the inner surface; a piston that reciprocates opposite to the filter in the cylinder; and a piston moving means that reciprocates the piston. Characterized by comprising.

  In the muddy water treatment apparatus with this configuration, the filter supported by the filter support portion provided on the inner surface side of the lid portion can be easily moved to a new filter by the filter moving mechanism. Therefore, clogging of the filter can be easily prevented.

  In addition to the structure of the invention described in claim 1, a muddy water treatment apparatus according to claim 2 is provided with a cleaning liquid for cleaning the filter that has moved to the outside of the filter support by the filter moving mechanism. A filter cleaning mechanism for discharging is provided. In the muddy water treatment apparatus with this configuration, in addition to the effect of the invention described in claim 1, since the cleaning liquid is discharged from the filter cleaning mechanism to the filter, the mud can be dropped from the filter and reused.

  The muddy water treatment apparatus according to claim 3 is characterized in that, in addition to the configuration of the invention according to claim 1 or 2, the periphery of the piston is formed of a flexible member. In the muddy water treatment apparatus with this configuration, in addition to the effect of the invention described in claim 1 or 2, when the pressure in the cylinder is excessively increased due to filter clogging or the like, the periphery of the piston is bent, and the cylinder and the piston A gap is created between them, allowing pressure to escape.

  In addition to the structure of the invention according to any one of claims 1 to 3, the muddy water treatment apparatus according to claim 4 is a vibration that removes solid matter larger than the mesh by vibrating the mesh above the slurry tank. A sieving device is provided. In the muddy water treatment apparatus with this configuration, in addition to the effects of the invention according to any one of claims 1 to 3, the vibration sieving apparatus can vibrate the net to remove solids larger than the net. Accordingly, it is possible to prevent solids such as stones and concrete pieces from entering the slurry tank and the cylinder.

  A muddy water treatment apparatus according to a fifth aspect is characterized in that, in addition to the configuration of the invention according to any one of the first to fourth aspects, a lid opening / closing mechanism for opening and closing the lid is provided. In the muddy water treatment apparatus with this configuration, in addition to the effect of the invention according to any one of claims 1 to 4, the lid portion of the cylinder can be easily opened and closed by the lid portion opening / closing mechanism.

  In addition to the structure of the invention according to any one of claims 1 to 5, the mud treatment apparatus according to claim 6 is provided adjacent to the slurry tank and stores the flocculant, and the flocculant tank And a flocculant supply means for supplying the flocculant from the agent tank to the slurry tank. In the muddy water treatment apparatus having this configuration, in addition to the effects of the invention according to any one of claims 1 to 5, the flocculant can be easily supplied from the flocculant tank to the slurry tank by the flocculant supply means.

1 is a front view of a muddy water treatment apparatus 1. FIG. 1 is a plan view of a muddy water treatment apparatus 1. FIG. It is a right view of the muddy water processing apparatus. It is a left view of the muddy water processing apparatus. It is a front view which shows the state which the cover part 31 of the muddy water processing apparatus 1 closed. It is a front view which shows the state which the cover part 31 of the muddy water processing apparatus 1 opened. 3 is an enlarged view of a lock mechanism 60. FIG. 3 is an enlarged front view of a piston 4. FIG. It is a figure of the filter washing | cleaning mechanism 36. FIG. It is a front view of the modification of the muddy water processing apparatus.

  Hereinafter, a muddy water treatment apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings. The muddy water treatment apparatus 1 mixes flocculant with muddy water (slurry) containing silt and clay to form flocs, and pressurizes and dehydrates the flocs (filter press) to generate a dehydrated cake. This dehydrated cake is dried to form a dry brick.

<Structure of the muddy water treatment apparatus 1>
Hereinafter, with reference to FIG. 1 thru | or FIG. 9, the detail of the structure of the muddy water processing apparatus 1 is demonstrated. First, with reference to FIG.1 and FIG.2, the whole structure of the muddy water processing apparatus 1 is demonstrated. The muddy water treatment apparatus 1 includes at least a slurry tank 2, a cylinder 3, a piston 4, a flocculant tank 5, a filter 32, a filter moving mechanism 6, a hydraulic pump 7, a generator 8, a vibration sieve device 10, and the like. The generator 8 supplies electric power to each motor described later. In FIG. 1, the top, bottom, left, and right of the figure are referred to as the top, bottom, front, and rear of the muddy water treatment apparatus 1.

<Structure of slurry tank 2>
As shown in FIGS. 1 and 2, the slurry tank 2 is a tank in which silt and clay-containing muddy water (slurry) and a flocculant are charged and mixed. The slurry tank 2 has a cylindrical side wall 21 and a circular shape in plan view. A bottom plate 22 is provided and the upper part is open. In the slurry tank 2, a stirring device 23 having a pair of stirring blades 24, 24 is rotatably provided. A motor 25 that drives the stirring device 23 by a chain 26 is provided below the slurry tank 2. The bottom plate 22 of the slurry tank 2 is provided with a substantially rectangular opening 22A as a connecting portion to the cylinder 3, and an opening / closing door 22B that moves horizontally with respect to the bottom plate 22 to open and close the opening 22A. . The open / close door 22B is opened and closed manually or by a hydraulic cylinder (not shown). As shown in FIG. 2, a ladder 100 is provided on the left side of the slurry tank 2.

<Structure of vibration sieve device 10>
As shown in FIGS. 1 and 2, a known vibration sieving device 10 is provided on the upper portion of the slurry tank 2. The vibration sieving device 10 is a device provided with a separation wire mesh 10A and a vibration motor (not shown) attached to a part of the lower surface of the separation wire mesh 10A. The separation wire mesh 10A of the vibration sieving device 10 is provided horizontally. The separation wire mesh 10A vibrates due to vibration of a vibration motor not shown. This vibration sieving apparatus 10 passes muddy water containing silt, clay and the like smaller than the mesh of the separation wire mesh 10A, and separates stones, concrete pieces and the like larger than the mesh of the separation wire mesh 10A.

<Structure of flocculant tank 5>
As shown in FIGS. 1 and 2, a flocculant tank 5 is provided adjacent to the front side (left side) of the slurry tank 2. The flocculant tank 5 stores flocculant mixed with mud water (slurry) containing clay to form flocs. As an example of the flocculant, for example, an inorganic flocculant is used. As an example of the inorganic flocculant, a flocculant having a main component of artificial zeolite is used. For example, a sub-cider 250 (trade name) of Senka Corporation can be used. As shown in FIGS. 1 and 2, the flocculant tank 5 includes a cylindrical side wall 51 and a circular bottom plate 52 in plan view, and the upper side is open. In the flocculant tank 5, a stirring device 53 having a pair of stirring blades 54, 54 is rotatably provided. Below the slurry tank 2, a motor 55 that drives the stirring device 53 with a chain 56 is provided. Further, as shown in FIG. 1, the flocculant tank 5 is provided with a flocculant pipe 57 that sends the flocculant from the flocculant tank 5 to the slurry tank 2. Under the flocculant pipe 57, a submersible pump 57A is provided.

<Structure of cylinder 3>
As shown in FIG. 1, the cylinder 3 extends in the left-right direction in FIG. 1 below the slurry tank 2 of the muddy water treatment apparatus 1. The cylinder 3 is formed in a square tube having a substantially square cross section (cross section perpendicular to the longitudinal direction of the cylinder 3 and the paper surface of FIG. 1) as shown in FIG. As shown in FIG. 1, a lid 31 that closes the front end (left end) of the cylinder 3 is provided at the front end (left end) of the cylinder 3. The lid portion 31 is an open / close door that can be opened and closed in a horizontal manner from a vertical state with the shaft support portion 40 as a fulcrum. Further, as shown in FIG. 1, a filter support net 31 </ b> A that supports the filter 32 is provided on the rear side (cylinder 3 side) of the lid portion 31. 31 A of filter support net | networks are comprised from metal metal net | networks, and are formed in the substantially square smaller than the cross section inside a cylinder 3 (cross section perpendicular | vertical to the paper surface of FIG. 1). The filter 32 is movable along the filter support net 31A. Note that drain tanks 90 and 93 are provided below the cylinder 3, and a pipe 98 for refluxing the supernatant liquid is connected from the drain tank 93 toward the drain tank 90.

<Structure of the lid 31 of the cylinder 3>
The structure of the lid portion 31 will be described with reference to FIGS. The lid 31 is pivotally supported by the pivotal support 40 and can be opened and closed between the vertical direction shown in FIGS. 1 and 5 and the horizontal direction shown in FIG. 6. The lid 31 is opened and closed by a lid opening / closing mechanism 41. The lid opening / closing mechanism 41 includes a winding motor 43, a support arm 42 that supports the winding motor 43, a winding wire 46, and the like. The support arm 42 extends horizontally forward (leftward) from the vertical frame 30. A winding motor 43 is fixed to the front end side (front side) of the support arm 42. A pulley 45 is fixed to the rotating shaft 44 of the winding motor 43. The pulley 45 winds the winding wire 46. The lower end portion of the winding wire 46 is fixed to a protrusion 47 provided slightly below the middle of the side end portion of the lid portion 31. The lid 31 is locked by the lock mechanism 60. Details of the lock mechanism 60 will be described later. When the winding motor 43 is driven and the rotating shaft 44 rotates counterclockwise with the lock mechanism 60 released, the pulley 45 rotates counterclockwise. When the pulley 45 winds the winding wire 46, the lid 31 opens from the vertical state shown in FIG. 5 to the horizontal state shown in FIG. 6, and the front end (left end) of the cylinder 3 is opened. As shown in FIG. 2, the pulley 45 is also provided on the rotating shaft 44 extending from the rear portion (left side) of the winding motor 43, and the protrusion 47 and the lock mechanism 60 are also provided on the left side surface of the lid portion 31. Yes. Accordingly, a pair of the lid opening / closing mechanism 41 and the lock mechanism 60 are provided corresponding to the left and right side ends of the lid 31. In FIG. 2, the lock mechanism 60 is not shown.

<Structure of lock mechanism 60>
Next, the structure of the lock mechanism 60 will be described with reference to FIG. The lock mechanism 60 includes a hydraulic cylinder 62, a hook 63, and the like. The hydraulic cylinder 62 is rotatably supported by a shaft portion 61 fixed to a frame (not shown) of the muddy water treatment apparatus 1. The hydraulic cylinder 62 is driven by a hydraulic pump (not shown). A hook 63 is fixed to the distal end portion 62 </ b> A of the hydraulic cylinder 62. The hook 63 is formed in a U-shape that opens downward. The hook 63 is provided with an engaging portion 63 </ b> A that engages with a cylindrical protrusion 48 provided at the side end of the lid portion 31. A pulley 63 </ b> B that freely rotates is provided at the lower end of the tip of the hook 63. The hook 63 can be retracted in the front-rear direction by a hydraulic cylinder 62. A support plate 65 is rotatably supported on the hydraulic cylinder 62 by a shaft portion 64. The shaft portion 64 is provided with a string spring 64A. The upper end portion of the string spring 64A is locked to a spring stop protrusion 64B on the hydraulic cylinder 62, and the upper end portion of the string spring 64A is a spring stop on the support plate 65. Locked by the protrusion 64C, the support plate 65 is urged counterclockwise. A locking plate 66 is provided on the front side (left side) of the support plate 65 and abuts against a shaft portion 68 fixed to a frame (not shown) of the muddy water treatment apparatus 1, so that the support plate 65 moves rearward (rightward) from the shaft portion 68. To prevent it from moving in the direction).

  As shown in FIG. 7, when the hydraulic cylinder 62 is driven, the distal end portion 62A is moved forward (leftward), and when the winding motor 46 is wound around the pulley 45 by driving the winding motor 43, the winding wire 46 is turned into the pulley 63B. , The lock mechanism 60 is lifted, and the hook 63 is detached from the protrusion 48. At this time, the support plate 65 is rotated counterclockwise by the biasing force of the string spring 64A, the lower end portion of the support plate 65 is locked to the shaft portion 68, and the hook 63 of the lock mechanism 60 is moved downward. To prevent falling. When the lid 31 is locked by the lock mechanism 60, the winding motor 43 is driven clockwise, the pulley 45 is rotated clockwise, the winding wire 46 is loosened, and the lid 31 is in the vertical state shown in FIG. To. Next, when the knob 67 provided on the support plate 65 shown in FIG. 7 is manually pushed forward to rotate the support plate 65 in the clockwise direction, the lower end of the support plate 65 is shown by a broken line in FIG. The support by the shaft portion 68 is released. The lock mechanism 60 rotates counterclockwise around the shaft portion 61 by its own weight, and the hook 63 engages with the protrusion 48. When the hydraulic pump is driven so as to reduce the oil in the hydraulic cylinder 62, the hook 63 moves rearward (rightward), the engaging portion 63A of the hook 63 engages with the protrusion 48, and the lid portion 31 is locked. Is done.

<Structure of piston 4>
Next, the structure of the piston 4 will be described with reference to FIGS. 1 and 8. The piston 4 is substantially square when viewed from the front side (left side in FIG. 1). As shown in FIG. 8, a plurality of substantially square metal plates 142 and a front end portion made of a substantially square metal plate 141 are stacked. It is fixed with bolts 144. A cylindrical spacer 145 is provided on the bolt 144 between the metal plates 142. In FIG. 8, there are five metal plates 142 as an example. A flexible resin plate 146 is sandwiched between the metal plates 142. The flexible resin plate 146 is, for example, a silicon resin plate material. For example, when one side in the cylinder of the piston 4 is 1 m × 1 m, the metal plate 142 constituting the piston 4 has a side of 96 cm × 96 cm and a thickness of 12 mm, and five metal plates are stacked. ing. For example, a flexible resin plate 146 protrudes from the metal plate by 2 cm around the metal plate, and sealing with the wall surface 103 of the cylinder 3 is ensured. Therefore, the periphery of the piston 4 is made of a flexible resin. The shaft 4 of the hydraulic cylinder 71 is fixed to the base 140 of the piston 4 and is reciprocated in the front-rear direction by the hydraulic pressure of the hydraulic pump 7.

<Structure of filter 32>
The filter 32 is a continuous cloth band having a width in the left-right direction of the cylinder 3 shown in FIG. 4, and is an eye filter that does not transmit silt or clay but allows water to pass therethrough. The filter 32 is wound around the supply roller 34C shown in FIGS. 1 and 5, and as shown in FIG. 5, is guided by the guide roller 34E and passes through the cylinder 3 side (right side) of the filter support net 31A. The roller 34F makes a U-turn, passes through the front side (left side) of the filter support net 31A, is guided by the guide rollers 34G and 34H, and is taken up by the take-up roller 34D.

<Structure of filter moving mechanism 6>
Next, the filter moving mechanism 6 will be described. As shown in FIGS. 1 and 5, the filter moving mechanism 6 includes a filter motor 34A, a supply roller 34C, a take-up roller 34D, and guide rollers 34E, 34F, 34G, and 34H. As shown in FIGS. 1 and 5, the supply roller 34 </ b> C and the take-up roller 34 </ b> D are held in two vertical stages on the vertical frame 30 on the left side of the flocculant tank 5. As shown in FIG. 5, the filter motor 34 </ b> A is provided on the vertical frame 30 in the vicinity of the flocculant tank 5. A pulley 34B is provided on the shaft of the filter motor 34A, and a drive belt 34I is stretched between the pulley 34B, the supply roller 34C, and the take-up roller 34D. A guide roller 34E is provided at an intermediate portion of the lid portion 31, a guide roller 34F is provided at a lower portion of the lid portion 31, and a guide roller 34G is provided outside the intermediate portion of the lid portion 31. . A guide roller 34H is provided above the guide roller 34E. The filter 32 is pulled out from the supply roller 34C by the drive of the filter motor 34A, guided by the guide rollers 34E, 34F, 34G, and 34H, and taken up by the take-up roller 34D. The space between the guide roller 34E and the guide roller 34F enters the cylinder 3.

<Structure of filter cleaning mechanism 36>
Next, the structure of the filter cleaning mechanism 36 will be described with reference to FIGS. As shown in FIG. 9, the filter cleaning mechanism 36 is provided in the lid portion 31, a pair of watering pipes 94 </ b> A and 94 </ b> A provided vertically, and four horizontally provided pipes connected to the watering pipe 94 </ b> A. Water sprinkling pipe 94B and air pipes 95, 95 that are provided in parallel to the sprinkling pipes 94A, 94A and inject air. A plurality of holes 96 for injecting water are formed in the watering pipe 94A and the watering pipe 94B. The air pipe 95 is also formed with a plurality of holes 95A for injecting air. As shown in FIG. 5, the watering pipe 94 </ b> A is connected to the pipe 94, and water pumped up by the submersible pump 91 is supplied from the drain tank 90. The compressed air region is supplied to the air pipe 95 from an air pump (not shown). The filter cleaning mechanism 36 cleans the filter 32 by spraying water and compressed air against the filter 32 passing through the outside (front side) of the filter support net 31A. As shown in FIG. 5, a cover 31 </ b> B is provided on the front side (left side) of the lid portion 31 to cover the front side and the lower portion of the lid portion 31, and the lower portion of the cover 31 </ b> B has a bowl shape that receives drainage. Is formed.

<Operation of the muddy water treatment apparatus 1>
Next, operation | movement of the muddy water processing apparatus 1 of the said structure is demonstrated. As shown in FIG. 1, in the state where the opening 22A of the slurry tank 2 is closed by the opening / closing door 22B, the muddy water containing silt, clay, etc. (slurry) that has passed through the mesh of the separation wire mesh 10A of the vibration sieving device 10 ) Is charged into the slurry tank 2 in a predetermined amount. A predetermined amount of flocculant is fed from the flocculant tank 5 to the slurry tank 2 through the flocculant pipe 57 by the submersible pump 57A. The flocculant is stirred and mixed with the muddy water (slurry) by the stirring blades 24 of the stirring device 23. Next, in a state where the piston 4 is lowered rearward (rightward), the opening / closing door 22B is opened, and muddy water (slurry) mixed with a flocculant is injected into the cylinder 3. Next, the open / close door 22B is closed, and the piston 4 moves toward the front (left) lid 31 by the hydraulic pressure of the hydraulic pump 7 to compress the muddy water (slurry).

  The water of the muddy water (slurry) passes through the filter 32 and the filter support net 31A and is dehydrated. Drainage from the lid portion 31 side is collected in the drainage tank 90 from the drainage port 35 via the drainage receptacle 92 </ b> B and the drainage pipe 92. The drainage pipe 92 is formed from a pipe such as vinyl chloride, and a bowl-shaped drainage receptacle 92B is fixed to the tip portion 92A, and receives drainage from the drainage port 35 below the lid portion 31. Drainage from the rear side (right side) of the cylinder 3 is collected in a drainage tank 93 via a drainage pipe 97. The muddy water (slurry) is mixed with a flocculant that forms flocs, so that a block-shaped floc mass is formed between the lid 31 of the cylinder 3 and the piston 4. The lock mechanism 60 is unlocked, and the winding motor 43 is driven to release the lid 31 to the horizontal state shown in FIG. Therefore, the muddy water treatment apparatus 1 can dehydrate the muddy water by performing a filter press and take out the cake.

  According to the muddy water treatment apparatus 1 of the present embodiment, the filter 32 is fed by a certain amount by the filter moving mechanism 6 and is washed by water sprayed from the filter washing mechanism 36 and compressed air. Cleaning of the filter 32 by the filter cleaning mechanism 36 is performed by operating an operation panel (not shown) at the discretion of the user. Therefore, mud can be dropped from the filter 32 and reused. When the pressure in the cylinder is excessively increased due to clogging of the filter 32 or the like, the periphery of the piston 4 is bent, and a gap is formed between the cylinder 3 and the piston 4 so that the pressure can be released. Further, the vibration sieving device 10 can vibrate the separation wire mesh 10A to remove solid matter larger than the mesh. Therefore, it is possible to prevent solids such as stones and concrete pieces from entering the slurry tank 2 and the cylinder 3. Moreover, since the lid portion 31 of the cylinder 3 can be easily opened and closed by the lid portion opening / closing mechanism 41, the cake can be easily taken out.

  The opening 22A is an example of the “connecting portion” in the present invention. The opening / closing door 22B is an example of the “connection portion opening / closing means” in the present invention. The filter support net 31A is an example of the “filter support portion” in the present invention. The hydraulic pump 7 and the hydraulic cylinder 71 are examples of the “piston moving means” of the present invention. The flocculant pipe 57 and the submersible pump 57A are examples of the “flocculant supply unit”.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the vibration sieving device 10 is not necessarily provided. Moreover, as shown in FIG. 10, you may provide the crawler 9 in the lower part of the muddy water processing apparatus 1. FIG. In this case, the drain tanks 90 and 93 may be detachable and attached as shown in FIG.

DESCRIPTION OF SYMBOLS 1 Muddy water processing apparatus 2 Slurry tank 3 Cylinder 4 Piston 5 Coagulant tank 6 Filter moving mechanism 7 Hydraulic pump 9 Crawler 10 Vibrating sieve apparatus 10A Separation metal net 31 Cover part 31A Filter support net 32 Filter 36 Filter washing mechanism 41 Cover part opening / closing mechanism 60 Lock mechanism 90 Drain tank 93 Drain tank 94 Drain pipe

Claims (6)

A slurry tank into which mud and flocculant are charged and mixed;
A cylinder provided below the slurry tank;
A connecting portion for connecting the slurry tank and the cylinder;
Connection part opening and closing means for opening and closing the connection part;
A lid provided at one end of the cylinder;
A filter that is provided on the inner surface side of the lid portion and passes the water from the muddy water to filter the mud,
A filter support portion provided on the inner surface side of the lid portion and movably supporting the filter;
A drain outlet for discharging water that has passed through the filter to the outside;
A filter moving mechanism for moving the filter along the inner surface of the lid;
A piston that reciprocates opposite to the filter in the cylinder;
A muddy water treatment apparatus comprising piston moving means for reciprocating the piston.   2. The muddy water treatment apparatus according to claim 1, further comprising a filter cleaning mechanism that discharges a cleaning liquid that cleans the filter to the filter moved to the outside of the filter support portion by the filter moving mechanism.   The muddy water treatment apparatus according to claim 1 or 2, wherein the periphery of the piston is formed of a flexible member.   The muddy water treatment apparatus according to any one of claims 1 to 3, wherein a vibration sieving device is provided at an upper portion of the slurry tank to vibrate a net to remove solid matter larger than the mesh.   The muddy water treatment apparatus according to claim 1, further comprising a lid opening / closing mechanism that opens and closes the lid. A flocculant tank provided adjacent to the slurry tank and storing the flocculant;
The muddy water treatment apparatus according to claim 1, further comprising a flocculant supply unit that supplies the flocculant from the flocculant tank to the slurry tank.

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