JP4754977B2 - Bagging dehydration method and equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a bagging and dewatering treatment method in which water-containing earth and sand such as mud soil, particularly viscous soil and silt mud is filled in a permeable bag and dewatered.

One of the methods for dehydrating high-water content mud soil dredged from rivers, lakes, oceans, etc., and effectively using it, filling mud soil into bags made of permeable fabric, etc. There is a bagging dehydration method for dehydrating by allowing permeation to pass outside the bag body (see Patent Document 1). According to this method, it is possible to improve the soil quality of the hydrous sand and reuse it as an earthwork material, or to dewater and reduce the amount of mud containing an environmental pollutant and contain it.
Conventionally, when a small bag is used, a backhoe filling method has been adopted in which water-containing earth and sand are scooped up with a backhoe and put into the bag through a measuring hopper when packing.
However, the backhoe filling method has low work efficiency, and the hydrated earth and sand are likely to be scattered during filling. It has a problem that it is not suitable for.
In addition, we also considered the use of a pump filling method in which hydrous sand is pumped and filled with a pump, but even in that case, the hydrous sand may leak from the connection between the pump side and the bag during filling. There was a risk of spilling or overflowing from the bag.
JP 2002-178000 A

  Therefore, the main problem of the present invention is to prevent the soil containing the soil from leaking from the connecting portion between the pump and the bag when filling the soil with the sand or after the filling is completed. is there.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In the dewatering processing method of bagging, the hydrous sand is filled into the permeable bag by a pump, and moisture is permeated out of the bag to dehydrate it.
As the bag body, a bag body having an inlet port protruding in a cylindrical shape is used,
The pump is connected to an injection line having a discharge port and a bag body attachment part that removably connects the injection port part of the bag body to the discharge port, and the injection port part of the bag body is connected to the injection pipe line. There line the filled and fixed to the bag body mounting portion,
A bag that can be inflated and contracted is provided so as to surround the periphery of the inlet, and when the filling into the bag is stopped, the pump is stopped and a fluid is pressurized and supplied into the bag. The inlet part is squeezed by inflating, thereby pressing the hydrated earth and sand in the inlet part into the bag body and closing the inlet part, and then releasing the connection between the bag body and the pump,
A bagging dehydration method characterized by the above.

(Function and effect)
In this case, since the discharge port of the injection pipe and the injection port of the bag body can be detachably connected, the bag body and the injection pipe can be easily and reliably connected. Or spilling.

In addition, when a bag body having an injection port portion that protrudes in a cylindrical shape is used, when the connection between the pump and the bag body is released after filling, conventionally, the earth and sand remaining in the injection port portion will flow backward to the outside. It sometimes overflowed. On the other hand, as described in this section, by squeezing the inlet portion of the bag body, when the hydrated earth and sand in the inlet portion is pushed into the bag body and the inlet portion is closed, the bag body and the pump are connected. Even if is released, since the hydrous sand does not remain in the inlet, it becomes difficult for the hydrous sand to overflow and contaminate the surroundings.

<Invention of Claim 2 >
When the filling into the bag body is stopped, after the injection port portion is squeezed, the connection between the bag body and the pump is released while performing suction from the middle of the path connecting the pump and the bag body. Item 1. A bag dehydrating method according to item 1 .

(Function and effect)
When filling the bag body with a pump, if the connection between the bag body and the pump is released after filling, the water-containing earth and sand remaining in the path connecting the pump and the bag body will be discharged and the surroundings will be soiled There is. On the other hand, if suction is performed as described in this section, the residual hydrous sand can be collected by suction, and the problem of soiling the surroundings due to the discharge of the residual hydrous sand can be avoided.

<Invention of Claim 3 >
In the water-permeable bag body having an injection port portion protruding in a cylindrical shape, filled with hydrous sand through the injection port portion, in the equipment for allowing moisture to permeate out of the bag body and dehydrating the bag contents,
A pump for pumping hydrous sand, an injection pipe communicating with the pump, a discharge port provided in the injection pipe, and an injection port portion of the bag body detachably connected to the discharge port of the injection pipe A bag body attaching portion, an inflatable / shrinkable bag disposed so as to surround the periphery of the inlet portion, and a fluid supply device that pressurizes and supplies a fluid into the bag. Is configured so that the inlet port of the bag body is squeezed and closed,
A dehydration facility for bagging.

(Function and effect)
The same effects as those of the first aspect of the invention can be achieved. In particular, when a fluid is pressurized and supplied into an inflatable bag that is arranged so as to surround the periphery of the inlet portion, the inlet portion is crushed by the inflated bag. As a result, the injection port is squeezed and closed. When the injection port portion is squeezed using the fluid pressure in this manner, it is possible to close the injection port portion regardless of the shape of the injection port portion, and there is also an advantage that the injection port portion is not easily fatigued.

<Invention of Claim 4 >
The bag attachment portion is provided on the outer surface of the injection pipe on the base end side with respect to the discharge port, and has a diameter-enlarged portion with an outer diameter gradually increasing toward the distal end side. And a ring member having an inner diameter smaller than the maximum diameter of the expanded diameter portion and larger than the minimum diameter, and a fixing mechanism for pressing the ring member against the maximum diameter side of the expanded diameter portion,
The injection port portion is configured to be clamped and fixed between the outer peripheral surface of the injection pipe line and the inner peripheral surface of the ring member.
The bagging dewatering equipment according to claim 3 .

(Function and effect)
In the bag body attachment portion described in this section, when a force in the direction of coming out of the injection conduit acts on the injection port portion of the bag body, a force toward the maximum diameter side of the enlarged diameter portion acts on the ring member. As a result, the ring member tightens the inlet part excessively. Therefore, it is possible to attach the bag body firmly and without leakage. Moreover, since the structure is simple, there is also an advantage that it functions reliably even in an environment in which hydrous sand is handled.

<Invention of Claim 5 >
The bagging dewatering processing facility according to claim 4 , wherein the fixing mechanism is a cylinder that reciprocates the ring member along the pressing direction and the opposite direction.

(Function and effect)
A configuration in which the ring member is pressed and separated using a cylinder in this manner is preferable because the ring member can be driven easily and strongly, and workability is improved.

<Invention of Claim 6 >
In the discharge outlet, a valve body for opening and closing the discharge opening tip, the check valve comprising a biasing means for biasing the valve element always in a closed state is provided, one of the claims 3-5 1 The bagging dehydration processing equipment according to item.

(Function and effect)
As described in this section, when a check valve is provided at the discharge port, the valve body is pushed open by the discharge force during discharge, but the valve body is closed by the biasing means during non-discharge, During installation or removal, hydrous sand is less likely to spill.

<Invention of Claim 7 >
The bagging dewatering processing facility according to any one of claims 3 to 6 , wherein a suction port is provided in the injection conduit, and a suction device is connected to the suction port.

(Function and effect)
The same effects as those of the second aspect of the invention can be achieved.

<Invention of Claim 8 >
The bagging dewatering processing facility according to claim 7 , wherein a flexible cylindrical body is connected to the discharge port, and the flexible cylindrical body is crushed and closed by a suction force of the suction device. .

(Function and effect)
When a suction device is used, if a flexible cylinder such as a rubber tube is connected to the discharge port, the cylinder can be crushed and closed when a suction force is applied, and spillage of hydrous soil can be prevented. In addition, in the case of a check valve, there is a risk that it will not close if foreign matter such as stone is clogged in the opening and closing part of the valve body. However, in the case described in this section, even if foreign matter such as stone exists in the flexible cylinder In addition, since the cylindrical body comes into close contact with the surface of the foreign matter and eventually closes, there is an advantage that the discharge port can be closed more reliably.

<Invention of Claim 9 >
A cylinder is attached to the discharge port,
One end of the flexible cylindrical body is folded back to the other end side to form a double cylinder having an inner cylinder part and an outer cylinder part. One end and the other end are fixed to the cylinder,
Further, pressurization pressure reducing means in the annular space between the inner cylinder part and the outer cylinder portion is connected, sacked dehydration treatment facility according to any one of claims 3-7.

(Function and effect)
In this embodiment, when the pressure in the annular space portion of the flexible cylindrical body is reduced by the pressurizing / depressurizing means through the fluid supply / discharge port and the flow path, the inner tube portion and the outer tube portion are brought into close contact with each other. The passage in the inner cylinder part which communicates spreads, and it will be in the state which can circulate hydrous sand. When the inside of the annular space portion of the flexible cylindrical body is pressurized through the fluid supply / discharge port and the flow path by the pressurizing / depressurizing means, the inner cylindrical portion bulges out with respect to the outer cylindrical portion, so that the inner cylindrical portion is expanded. The passage is narrowed and blocked, and the hydrated sand cannot flow. In this embodiment, even if a foreign substance such as a stone is caught in the inner cylinder part, the discharge port can be reliably closed by the inner cylinder part closely contacting the surface of the foreign substance. Moreover, since the inner cylinder part is opened by decompression, the opening can be performed reliably.

  As described above, according to the present invention, when filling the hydrated earth and sand into the bag or after the filling is completed, it is possible to prevent the hydrated earth and sand from leaking from the connection portion between the pump and the bag and contaminating the workplace. The benefits of

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an example of a processing facility according to the present invention. This example is suitable for treating mud soil and sludge such as sludge existing in the bottom of rivers and lakes on the nearby shore. Needless to say, the place is not limited.

  The illustrated embodiment will be described in more detail. First, the hydrous sand 1 to be treated is supplied to the separation / removal device 2 to separate and remove coarse substances 2x such as dust, waste, and waste. The separation / removal device 2 is not particularly limited, but a vibration sieve device is preferable in consideration of the properties of the object. Moreover, it is preferable that the hydrous sand 1 to be treated is temporarily stored in a treatment pit or the like installed in the vicinity and the treated amount is pumped out by a backhoe or the like and supplied.

  The hydrous sand 1 from which the coarse matter 2x is separated and removed is then supplied to the weight measuring means 3 by a pump or the like (not shown). The weight measuring means 3 is not particularly limited as long as it can measure the hydrous sand 1 in a batch or continuous manner, but supports the hopper through the load cell, measures the hydrous sand 1 together with the hopper, and then subtracts the hopper weight. The thing of a type can be used conveniently.

  Next, the hydrated earth and sand 1 whose weight has been measured is supplied to the hydration means 4 and hydrated to a predetermined moisture content based on the weight measurement result and the known moisture content of the hydrated earth and sand 1. For this purpose, it is measured in advance how much the moisture content of the hydrous sand 1 to be treated is. This measurement can be performed every time the water content ratio fluctuates greatly, for example, every time the type, dredging location, date, etc. of the water-containing earth and sand 1 changes.

  The hydration means 4 is not particularly limited as long as water can be added to the hydrous sand 1, but an apparatus that performs mixing while unraveling the hydrous sand 1 by stirring, such as a biaxial mixer, can be suitably used. . Reference numeral 5 denotes a water storage tank that stores water for hydration.

  In the illustrated form, the hydrous sand 1 hydrated by the hydration means 4 is then supplied to the storage means 6 and temporarily stored. The storage means 6 is preferably an agitator or the like that performs storage while stirring so as not to solidify, but a simple storage tank having no such function can also be used. Further, the storage means 6 can be omitted.

  Further, it is preferable that the parts from the separation / removal device 2 to the storage means 6 are integrated so as to be compact so that they can be mounted on a large vehicle (about 15 t).

  The water-containing earth and sand 1 having a predetermined water content ratio due to the hydration treatment is weighed by the measuring means 7 and then filled into the water-permeable bag 9 by the filling means 8. As the bag body 9, as shown in FIG. 4, one having an injection port portion 9i protruding in a cylindrical shape can be suitably used.

  The measuring means 7 is not particularly limited, but in the illustrated example, the measuring container 7C having a predetermined volume (for example, preferably the same volume as the bag body, a plurality of times, or a volume that is a part of a plurality of times). And a measuring pump 7P for supplying the hydrous sand 1 into the measuring container 7C, and an outlet valve 7V provided in a supply path from the measuring container 7C to the filling means 8. By operating the metering pump 7P with the outlet valve 7V closed, the hydrous sand 1 in the storage means 6 can be supplied into the metering container 7C to measure a predetermined amount, and the metering pump 7P is stopped. By opening the outlet valve 7V in the state, the hydrous sand 1 measured in the measuring container 7C can be supplied to the filling means 8.

  In a more preferred form, a moisture content measuring means is provided in order to measure the moisture content of the hydrous soil 1 in the measuring container 7C. As the moisture content measuring means, a known soil moisture meter can be used. Each time the moisture containing sand 1 is supplied into the measuring container 7C, a part is sampled and the moisture content is measured, and then the filling means 8 is used. It is preferable that the bag 9 is filled with the above.

  Moreover, the filling means 8 can employ | adopt the form which extracts the water-containing earth and sand 1 in 7 C of measuring containers by the filling pump 8P, and pumps in the bag body 9 via the injection pipe line 8L, for example like illustration. The injection line 8L can be supported by the arm 11 of the backhoe 10 as shown in FIGS. 2 and 3, for example. Of course, an appropriate support device such as a gantry can be used, but one that can move the position of the injection pipe line 8L is preferable.

  When the bag 9 is weighed and filled, when the batch-type weighing means 7 as described above is used, the filling operation cannot be performed during the weighing, so that the work efficiency is lowered. Therefore, as shown in the drawing, a plurality of sets of measuring containers 7C are provided, valves 7W and 7V are provided on the inlet side and the outlet side of each measuring container 7C, and the supply and discharge of each measuring container can be switched by switching the valves. It is preferable to do this. As a result, for example, at least one weighing container 7C can be constantly being weighed, and at least one other can be discharged, so that continuous weighing is possible. In addition, it is preferable that the injection pipe line 8L to be used can be switched by providing a plurality of injection pipe lines 8L and providing each injection pipe line 8L with a filling valve 8V. In this case, while always filling the bag body 9 through at least one injection pipe line 8L, the filling of the bag body 9 to be filled is performed without filling the other at least one injection pipe line 8L. Exchange work can be performed, and efficient filling becomes possible.

  More specific examples in the case of using the plurality of injection pipes 8L are shown in FIGS. That is, a support portion 12 is attached to the distal end portion of the arm 11 of the backhoe 10, and a number of swivels 12s corresponding to the number of injection conduits 8L are arranged in parallel along the vertical direction on the support portion 12. Yes. The proximal end side portion 20 of the injection pipe line 8L is connected to the distal end side portion 21 via each swivel 12s. The distal end side portion 21 of the injection pipe line 8L is bent and extended laterally from the swivel position, and the bag mounting portion 30 provided at the distal end thereof has a predetermined radius of rotation with respect to the rotation center of the swivel 12s. For example, it is configured to freely rotate with a radius of rotation larger than half of the installation interval of the bag body 9. Therefore, as shown in FIG. 3, if a plurality of bag bodies 9 are arranged so that the inlet 9 i of the bag body 9 is positioned under the rotation locus of the bag body mounting section 30, the bag body mounting section 30. Is attached to the next bag body 9, positioning is possible only by rotating only the front-end bag body mounting portion 30 without moving the entire injection pipe line 8L, and the work is facilitated. In this embodiment, when injecting into the bag body 9 at a position outside the movement range of the bag body mounting portion 30, the support portion 12 is moved by the arm 11, or the backhoe 10 itself is moved. It can respond by.

  It is preferable that a bag body attaching portion 30 is provided in the injection pipe line 8L so that the bag body 9 can be detachably connected. The bag body attaching portion 30 is not particularly limited, but when the bag body 9 having an injection port portion 9i protruding in a cylindrical shape as shown in FIG. 4 is used, the one having the structure shown in FIG. 5 is preferable.

  That is, the bag body attachment portion 30 constitutes the distal end portion of the injection pipe line 8L, and has a tubular portion 40 in which the distal end opening is formed as the discharge port 41, and a proximal end side from the discharge port 41 on the outer surface of the tubular portion 40. The diameter-enlarged portion 42, the outer diameter of which gradually increases toward the distal end side, is passed through the enlarged-diameter portion 42, and is smaller than the maximum diameter and smaller than the minimum diameter. A ring member 50 having a larger inner diameter, and a fixing mechanism 65 that presses the ring member 50 against the maximum diameter side of the enlarged diameter portion 42.

  In the state shown in the drawing, that is, in a state where the tubular portion 40 is inserted into the injection port portion 9i of the bag body 9 and the injection port portion 9i is inserted between the outer peripheral surface of the tubular portion 40 and the inner peripheral surface of the ring member 50 By pressing the ring member 50 against the maximum diameter side of the enlarged diameter portion 42 by the mechanism 60, the injection port portion 9i of the bag body 9 is connected to the outer peripheral surface of the tubular portion 40 and the inner peripheral surface of the ring member 50 as shown in the figure. It can be fixed in between. Therefore, it is possible to attach the bag body 9 firmly and without leakage.

  The fixing mechanism 65 is not particularly limited as long as it can press the ring member 50. In the form shown in FIG. 5, a body portion 66 of a cylinder such as an air cylinder is fixed to the outer surface of the tubular portion 40 via a mounting bracket 67, and a piston rod 68 that is expanded and contracted with respect to the body portion 66 is a ring. The ring member 50 is pressed against the enlarged diameter portion 42 and separated from the enlarged diameter portion 42 according to the expansion and contraction of the piston rod 68. It is preferable to provide a plurality of fixing mechanisms 65 around the tubular portion 40 at equal intervals in the circumferential direction because the ring member 50 can be pressed against the diameter-expanded portion 42 with good balance.

  Also, a fixing mechanism 60 as shown in FIG. 6 can be employed. That is, in the fixing mechanism 60, a male screw portion 61 is provided on the outer surface of the tubular portion 40, and a nut member 63 with a handle 62 is screwed to the male screw portion 61, and the lower side of the nut member 63 When the nut member 63 descends with respect to the male thread portion 61 due to the rotation of the handle 62, the abutment member 64 descends and the ring member 50 is brought into contact with the upper surface of the ring member 50. The ring member 50 is pressed against the enlarged diameter portion 42. When the handle 62 is rotated in the opposite direction, the abutting member 64 rises together with the nut member 63 as shown in the figure, and the pressing of the ring member 50 is released. In this state, the injection port 9i of the bag body 9 can be removed by moving the ring member 50 to the small diameter part side of the enlarged diameter part 42.

  On the other hand, when using the bag mounting part 30 as described above, the operability is improved, and it becomes difficult for the hydrated earth to leak or spill at the time of filling or the like. The case cannot be prevented.

  For example, if the bag body 9 is removed from the injection pipe line 8L immediately after filling, the hydrous soil remaining in the inlet 9i of the bag body 9 due to the pressure inside the bag body 9 A situation occurs in which 1 flows backward, spills in the vicinity, and pollutes the work place. In order to solve this, in the present invention, when the filling into the bag body 9 is stopped, the filling pump 8P is stopped and the inlet 9i is squeezed so that the water-containing earth and sand in the inlet 9i is sacked. It is proposed that the bag body 9 is pushed into the body 9 and the inlet 9i is closed, and then the bag body 9 is disconnected from the bag mounting portion 30.

  Specifically, as shown in FIG. 7, an inflatable / deflateable bag 90 is arranged so as to surround the inlet 9i, and a fluid supply device such as an air compressor is connected to the bag 90 via a hose 95. 96 may be connected, and the fluid supply device 96 may be configured to pressurize and supply the fluid into the bag 90. When fluid is pressurized and supplied into the inflatable bag 90 arranged so as to surround the inlet 9i, the inflated bag 90 crushes the inlet 9i from the surroundings, and as a result, the inlet 9i. Is closed and closed. When the inlet 9i is squeezed using the fluid pressure in this way, the inlet 9i can be tightly closed regardless of the shape of the inlet 9i, even if stones or the like are present in the inlet 9i.

  The shape of the bag 90 may be determined as appropriate. FIG. 8 shows an example of the bag 90, which has an inner cylindrical portion 91 and an outer cylindrical portion 92, and has a fluid supply chamber 93 that is continuous in a ring shape between them. The insertion port portion 9i of the bag body 9 is inserted through. Although not shown, a structure in which a plurality of fluid supply chambers are arranged in the circumferential direction may be employed. As long as the inlet 9i of the bag 9 can be squeezed and closed, a mechanical squeezing means such as a clip or a clamp can be used instead of the bag 90.

  As another case, for example, when the bag body 9 is removed from the injection pipe line 8L after filling, a case where the hydrated earth and sand 1 remaining in the injection pipe line 8L spills in the vicinity can be exemplified. As shown in FIG. 9, this case can be solved by providing a check valve 70 by a valve body 71 that opens and closes the discharge port 41 and a biasing means 72 that biases the valve body 71 to a closed state. Can do. In the illustrated embodiment, the valve element 71 can be brought into contact with and separated from the valve seat including the peripheral edge of the discharge port 41. A support shaft 73 protrudes along the separation direction on the surface of the valve body 71 opposite to the valve seat side, and the support shaft 73 is inserted into a cylindrical support portion 74 provided in front of the discharge port 41. The valve body 71 is movable only in the direction in which the back support shaft 73 is inserted into and removed from the cylindrical support portion 74. The cylindrical support portion 74 is connected to the distal end portion of the tubular portion 40 by a bracket 75, and a spring 72 as an urging means is passed outside the support shaft 73 and the cylindrical support portion 74. 72, the valve body 71 is urged toward the valve seat by using the bracket 75 as a reaction force receiver.

  In such a check valve 70, the valve body 71 is pushed by the discharge force during discharge to be opened, but the valve body 71 is closed by the biasing means 72 during non-discharge. In this case, it is difficult for the hydrous sand 1 to spill.

  Moreover, the form shown in FIG. 12 is also preferable. That is, one end of a flexible tubular body 101 such as a hose or a rubber tube is fixed to the outer peripheral surface of the distal end portion of the tubular body 100 of the tubular body 100 communicating with the discharge port 41 by a band or the like. The other end of the body 101 is folded outward so that the inner and outer surfaces are reversed, and then fixed to the outer peripheral surface of the cylindrical body 100 on the base end side (upper side) than the one end, and the inner cylindrical portion 102 And an outer cylinder part 103 are formed in a double cylinder shape. An annular space 104 is formed between the inner cylinder portion 102 and the outer cylinder portion 103. A flow path 105 is formed in the wall of the cylindrical body 100, and the distal end of the flow path 105 is opened and communicated with a gap between the proximal end portion of the inner tubular portion 102 and the proximal end portion of the outer tubular portion 103. Yes. The base end of the flow path 105 opens to the outer peripheral surface of the cylindrical body 100 and is exposed as the supply / discharge port 106, and is connected to a pressurizing and decompressing means (not shown). The pressurizing and depressurizing means is not particularly limited, but can be configured by combining an air compressor and a suction pump, and providing a switching valve so that both can be switched and used.

  In this embodiment, when the hydrous earth and sand 1 is filled, if the inside of the annular space 104 of the flexible tubular body 101 is depressurized by the pressurizing and depressurizing means via the fluid supply / discharge port 106 and the flow path 105, the inner cylinder As a result of the close contact between the portion 102 and the outer cylindrical portion 103, the passage in the inner cylindrical portion 102 communicating with the discharge port 41 is expanded, and the hydrated earth and sand can be circulated. When the filling is completed, when the inside of the annular space 104 of the flexible cylindrical body 101 is pressurized by the pressurizing and depressurizing means through the fluid supply / discharge port 106 and the flow path 105, it is indicated by a two-dot chain line in the figure. Thus, when the inner cylinder part 102 bulges with respect to the outer cylinder part 103, the channel | path in the inner cylinder part 102 becomes narrow and obstruct | occludes, and it will be in the state which cannot circulate hydrous sand. Since the flexible cylindrical body 101 is flexible and the closed portion of the inner cylindrical portion 102 is lengthened by ensuring a sufficient folding length, even if foreign matters such as stones are caught in the inner cylindrical portion 102, The discharge port 41 can be reliably closed when the inner cylinder portion 102 is in close contact with the surface of the foreign matter or when the inner cylindrical portion 102 is closed before and after the foreign matter.

  When the bag 90 is used in combination with the sealing mechanism using the flexible tubular body 101, for example, after the filling of the hydrous sand is completed and the filling pump 8P is stopped, the bag 90 is filled with the inlet 9i. It is preferable to close the injection line 9L by pushing the earth and sand in the injection port portion 9i into the bag body 9i and then operating the seal mechanism to close the injection line 8L. Thereafter, the tip of the injection pipe line 8L can be removed from the injection port portion 9i. The bag 90 removed from the injection line 8L closes the injection port 9i with a fastening means such as a binding band above the bag 90, releases the pressure in the bag 90, and removes the bag 90 from the injection port 9i. The removed bag 90 can be reused for later dehydration. Thus, even when the bag body 9 is removed from the injection conduit 8L, the hydrated earth does not leak from the inlet 9i and the tip of the injection conduit 8L, and contamination of the work place can be reliably prevented.

  Further, as shown in FIG. 10, a suction port 81 is provided by a T-shaped tube or the like in the middle of the injection conduit 8 </ b> L connecting the filling pump 8 </ b> P and the bag body 9, particularly in the vicinity of the discharge port 41. When the filling device 8 is connected and the filling into the bag body 9 is stopped, the filling pump 8P is stopped and the inside of the injection pipe line 8L is sucked from the suction port while the bag body 9 and the filling pump 8P are connected. It is also a preferable form to release the connection. By removing the bag body 9 while sucking in this way, the residual hydrous sand 1 in the injection pipe line 8L can be sucked and collected, and the risk of soiling the surroundings can be reduced. It is preferable to return the hydrous sand 1 sucked by the suction device 82 to the upstream side of the measuring means 7, in particular, to the water adding means 4 or the storage means 6.

  Further, the suction means 80 can be used together with the above-described check valve 70, which is one of the preferable forms. However, when it is assumed that the suction means 80 is used, as shown in FIG. It is also preferable that the flexible cylinder 85 such as a rubber tube is connected to the discharge port 41 and the flexible cylinder 85 is crushed and closed by the suction force of the suction means 80. Unlike the case of the check valve 70, this form is more reliable because foreign matter such as stone is present in the cylinder 85, and the cylinder 85 is in close contact with the surface of the foreign substance and eventually closes. There is an advantage that the discharge port 41 can be closed.

  On the other hand, when the hydrated earth and sand 1 is filled in the water permeable bag body 9, only moisture is permeated and discharged out of the bag body 9, and solid contents such as soil particles remain in the bag body 9 and are contained. Since the drainage is very beautiful, if there is no concern about harmful substances, it can be discharged into the original river or the like after being subjected to appropriate purification treatment as it is or as needed through the drainage ditch. Preferably, the hydrous sand 1 is press-fitted into the bag body 9. As a result, the bag contents are pressure-dehydrated by the filling pressure, so that highly efficient bagging and dehydration can be performed. Further, in the present invention, dehydration is performed by pressurization and evaporation of moisture due to the weight of the injected hydrous sand 1, or the stacked bags are sequentially stacked to depressurize and dehydrate the lower bag, Can be mechanically pressurized and dehydrated.

In bag dehydration, there is a difference in the time from the start of injection until the filter effect is fully exerted depending on the roughness of the water-permeable bag body 9, but in any case, it is sufficient to inject it to some extent. Is demonstrated. Therefore, basically, the roughness of the mesh of the bag body 9 is not questioned, but in order to exert a filter effect that is sufficiently high from the beginning of injection, the water permeability coefficient of the water-permeable bag body 9 is 1.0 ×. The thing of 10 < ^-3 > cm / sec or more and a water permeation | transmission hole diameter of 90-600 micrometers is preferable. Further, from the viewpoint of high acid resistance and alkali resistance and chemical stability, a bag formed of a nonwoven fabric, a woven fabric, a knitted fabric or the like made of a chemical fiber such as polyester or polypropylene fiber can be preferably used. A specific example of the water-permeable bag 9 is shown in Table 1.

  In particular, when the hydrous sand 1 is press-fitted as described above, the bag body 9 may expand and break, so that it is reinforced by, for example, winding a reinforcing material such as a geogrid with high tensile strength around the outside of the bag 9 in advance. The made bag 9 can be used.

  Further, in order to enhance the filter effect, by using a multiple bag body in which a plurality of bag bodies 9 are stacked, the particle capturing effect in the hydrous sand 1 can be enhanced, and the strength of the bag body 9 is also improved. In this case, the bag bodies 9 made of different materials can be combined and stacked.

  In addition, the bag for dehydration described in Japanese Patent Application No. 8-21437, Japanese Patent Application No. 10-37151, Japanese Patent Application No. 8-59964, Japanese Patent Application No. 8-188203, and Japanese Patent Application No. 11-030139, etc. A known dehydrating bag can be used. Note that these conventional dehydration techniques do not contain harmful substances in the bag for the harmful substance-containing mud soil as in the present invention.

  On the other hand, the hydrous soil 1 such as mud may contain harmful substances (environmental pollutants), but many harmful substances, especially dioxins, PCBs, arsenic, lead and other harmful substances, It is attached to other suspended particles. Therefore, when dehydration is performed as described above, these harmful substances are contained in the bag body 9.

  As the hydrous sand 1 containing such harmful substances, there are some widths depending on the location, and it cannot be generally stated, but “Environmental standards related to soil contamination (August 23, 1991, "Environmental Agency Notification No. 46)", "Prime Ministerial Ordinance Establishing Drainage Standards (June 21, 1971, Prime Minister Ordinance No. 35)", "Environmental Standards Concerning Groundwater Water Pollution (March 13, 1997) Japan Environmental Agency Notification No. 10) ”,“ Environmental Standards Concerning Water Pollution (December 28, 1971, Environmental Agency Notification No. 59) ”,“ Act on the Prevention of Soil Contamination of Agricultural Land (Showa 45) December 25, 1993, Law No. 139), “Environmental Standards Concerning Air Pollution, Water Pollution, and Soil Contamination by Dioxins (December 27, 1999, Environmental Agency Notification No. 68)”, etc. Do not conform to standards such as various laws and operational standards It means a thing. Various standards are shown in Tables 2 and 3 together with specific examples of harmful substances.

  INDUSTRIAL APPLICABILITY The present invention can be applied to dewatering hydrous soil such as mud dredged from rivers, lakes, oceans, etc. for effective use.

It is the schematic of embodiment of this invention. It is a front view which shows a filling aspect. It is a top view which shows a filling aspect. It is a perspective view which shows the example of the water-permeable bag body before (a) expansion | swelling and (b) expansion | swelling. It is a longitudinal cross-sectional view of a bag attaching part. It is a longitudinal cross-sectional view of a bag attaching part. It is a schematic diagram of the form which squeezes the injection mouth part of a bag with a bag. It is a perspective view of a bag. It is a longitudinal cross-sectional view of a bag attaching part. It is a block diagram of a suction means and a bag body attaching part. It is a longitudinal cross-sectional view of a bag attaching part. It is a longitudinal cross-sectional view of the discharge port closing mechanism.

  DESCRIPTION OF SYMBOLS 1 ... Water-containing earth and sand, 2 ... Separation removal means, 3 ... Weight measurement means, 4 ... Water addition means, 5 ... Water storage tank, 6 ... Storage means, 7 ... Measuring means, 7C ... Measuring container, 7P ... Measuring pump, 7V ... Out Side valve, 7W ... Inlet valve, 8 ... Filling means, 8P ... Filling pump, 8L ... Filling pipe, 8V ... Filling valve, 9 ... Bag body, 9i ... Inlet port, 10 ... Backhoe, 11 ... Arm, 12 DESCRIPTION OF SYMBOLS ... Support part, 12s ... Swivel, 20 ... Base end side part, 21 ... Tip side part, 30 ... Bag body attaching part, 40 ... Tubular part, 41 ... Discharge port, 42 ... Diameter expansion part, 50 ... Ring member, 60 ... Fixing mechanism 61 ... Male thread part 62 ... Handle 63 ... Nut member 64 ... Abutting member 65 ... Fixing mechanism 66 ... Cylinder body part 67 ... Mounting bracket 68 ... Piston rod 70 ... Reverse Stop valve, 71 ... valve body, 72 ... biasing means, 73 ... support shaft, 74 Cylindrical support, 75 ... bracket, 80 ... suction means, 81 ... suction port, 82 ... suction device, 85 ... flexible cylinder, 90 ... bag, 100 ... cylinder, 101 ... flexible cylinder, DESCRIPTION OF SYMBOLS 102 ... Inner cylinder part, 103 ... Outer cylinder part, 104 ... Annular space part, 105 ... Flow path, 106 ... Supply / exhaust port.

Claims (9)

In the dewatering processing method of bagging, the hydrous sand is filled into the permeable bag by a pump, and moisture is permeated out of the bag to dehydrate it.
As the bag body, a bag body having an inlet port protruding in a cylindrical shape is used,
The pump is connected to an injection line having a discharge port and a bag body attachment part that removably connects the injection port part of the bag body to the discharge port, and the injection port part of the bag body is connected to the injection pipe line. There line the filled and fixed to the bag body mounting portion,
A bag that can be inflated and contracted is provided so as to surround the periphery of the inlet, and when the filling into the bag is stopped, the pump is stopped and a fluid is pressurized and supplied into the bag. The inlet part is squeezed by inflating, thereby pressing the hydrated earth and sand in the inlet part into the bag body and closing the inlet part, and then releasing the connection between the bag body and the pump,
A bagging dehydration method characterized by the above. When the filling into the bag body is stopped, after the injection port portion is squeezed, the connection between the bag body and the pump is released while performing suction from the middle of the path connecting the pump and the bag body. Item 1. A bag dehydrating method according to item 1 . In the water-permeable bag body having an injection port portion protruding in a cylindrical shape, filled with hydrous sand through the injection port portion, in the equipment for allowing moisture to permeate out of the bag body and dehydrating the bag contents,
A pump for pumping hydrous sand, an injection pipe communicating with the pump, a discharge port provided in the injection pipe, and an injection port portion of the bag body detachably connected to the discharge port of the injection pipe A bag body attaching portion, an inflatable / shrinkable bag disposed so as to surround the periphery of the inlet portion, and a fluid supply device that pressurizes and supplies a fluid into the bag. Is configured so that the inlet port of the bag body is squeezed and closed,
A dehydration facility for bagging. The bag attachment portion is provided on the outer surface of the injection pipe on the base end side with respect to the discharge port, and has a diameter-enlarged portion with an outer diameter gradually increasing toward the distal end side. And a ring member having an inner diameter smaller than the maximum diameter of the expanded diameter portion and larger than the minimum diameter, and a fixing mechanism for pressing the ring member against the maximum diameter side of the expanded diameter portion,
The injection port portion is configured to be clamped and fixed between the outer peripheral surface of the injection pipe line and the inner peripheral surface of the ring member.
The bagging dewatering equipment according to claim 3 . The bagging dewatering processing facility according to claim 4 , wherein the fixing mechanism is a cylinder that reciprocates the ring member along the pressing direction and the opposite direction. In the discharge outlet, a valve body for opening and closing the discharge opening tip, the check valve comprising a biasing means for biasing the valve element always in a closed state is provided, one of the claims 3-5 1 The bagging dehydration processing equipment according to item. The bagging dewatering processing facility according to any one of claims 3 to 6 , wherein a suction port is provided in the injection conduit, and a suction device is connected to the suction port. The bagging dewatering processing facility according to claim 7 , wherein a flexible cylindrical body is connected to the discharge port, and the flexible cylindrical body is crushed and closed by a suction force of the suction device. . A cylinder is attached to the discharge port,
One end of the flexible cylindrical body is folded back to the other end side to form a double cylinder having an inner cylinder part and an outer cylinder part. One end and the other end are fixed to the cylinder,
Further, pressurization pressure reducing means in the annular space between the inner cylinder part and the outer cylinder portion is connected, sacked dehydration treatment facility according to any one of claims 3-7.

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