JP4755907B2 - Suspended material collection method and apparatus - Google Patents

Description

  The present invention relates to a pond, a lake, a reservoir, a dam cove, a moat, or a closed water area or a microfluidic water area in which suspended matter containing phytoplankton or the like is retained, such as a blue seawater or a red tide generating water area. The present invention relates to a technique for collecting and removing turbid substances and purifying these water areas, and particularly relates to a method and apparatus for collecting suspended substances drifting in a wide area in the water areas and efficiently collecting the suspended substances.

  Conventionally, as a method for collecting suspended substances floating in a water area, a suspended substance suction port connected to a suction pump via a suction hose is placed under the surface of the water area, and suspended from the suction port by the suction pump. A method of sucking a substance with water is generally used (see Patent Document 1).

  In the above method, in order to increase the collection efficiency, a method has been proposed in which floating suspended substances are gathered toward the suction port (see Patent Document 2 and Patent Document 3).

In the method described in Patent Document 3 , microbubbles are generated near the lower part of the distribution range of suspended substances, for example, blue water, and the water bubbles are attached to the micro bubbles, and the micro bubbles are attached to the water surface. A water flow is generated to cause the water buoy to float toward the suction port, and the method described in Patent Document 2 includes the suction port. An annular flow is generated around the suction port by a rotating blade provided around the nozzle, and the water is guided to the suction port by being placed on the annular flow.

JP 2002-1371 A JP 2000-303438 A JP 2004-8948 A

  In any of the conventional methods described in Patent Documents 2 and 3, the range of the water area in which suspended substances can be collected is relatively narrow. Therefore, in order to cope with suspended substances scattered over a wide range of water areas, Since it is necessary to install several sets of equipment and devices in many places and the installation work is time-consuming, there is a problem that the equipment cost and work cost are increased.

  Accordingly, an object of the present invention is to provide a suspended substance collection method capable of easily installing a necessary apparatus, collecting and collecting suspended substances in a wide range of water areas with less work and cost, and Is to provide a device.

  The invention of the method according to claim 1, which achieves the above object, is directed to a suspended matter collecting method for guiding suspended matter drifting in a wide area in a water area toward a suction port for collection, and sucking and collecting from the suction port. A plurality of rope guide members are arranged around the adjustment water area set to collect the suspended matter at intervals in the circumferential direction, and the ropes are sequentially spanned over these rope guide members and stretched in an annular shape. The floating body holding the suction port is arranged in the center of the set water area, a silt fence is stretched between the floating body and the endless rope, and the endless rope is moved by the rope guide member. Under the guidance, it is circulated and driven, so that the silt fence is swung along the water surface around the floating body. The to the suction port to generate a water flow towards, and characterized by inducing suspended solids suspended in the water to said inlet put on the water flow.

  With this configuration, the rope guide device is installed in the water area to be adjusted, the ropes are routed around the rope guide device, the floating body is arranged, the silt fence is installed between the floating body and the endless rope, and the endless rope is installed. A relatively simple operation of installing a circulation drive device can handle suspension collection of a wide range of adjusted water areas. After such installation operation, the operation of circulating the endless rope is performed, and silt is performed. The fence is swung around the floating body around the floating body.At this time, the rotation of the silt fence is faster on the side closer to the outer endless rope and slower on the side closer to the inner floating body. The flow is from the fastest to the slowest, i.e., by this swirl, the water area is along the silt fence from the endless rope side. Body water flow occurs toward the direction, suspended solids suspended in water is put on this water is guided toward the suction port, is caused to concentrate in the peripheral inlet.

  As described in claim 2, in the method according to claim 1, the suspended substance is sucked from the suction port by flowing water from all directions around the floating body in the direction along the water surface toward the suction port. If generated, the suction action of the suspended solid-containing fluid from the suction port generates a flow of fluid toward the suction port around the suction port, and this flow interacts with the water flow by the silt fence. Thus, a greater induction and concentration effect of the suspension around the suction port is brought about.

  As described in claim 3, in the method according to claim 1 or 2, the turbidity of the suspended-substance-containing water sucked from the inlet is measured, and the turbidity is set as a standard for achieving purification. If the turning motion of the silt fence is continued until the allowable value is reached, the turning of the silt fence for achieving the adjusted water area purification target can be performed automatically and effectively without excess or deficiency. The allowable value is a value set as a guide indicating that the purification has been achieved as described above, and this value is preferably determined by an operator on site.

  The invention according to claim 4 is an invention of an apparatus used for carrying out the above-mentioned method, and guides suspended substances floating in a wide area in the water area toward the sampling inlet, and the inlet A plurality of rope guide members arranged at intervals in the circumferential direction around the adjusted water area set to collect the suspended substance, An endless rope that is sequentially stretched over the rope guide member, and that is stretched in an annular shape, a floating body that holds the suction port forming member that forms the suction port, and is disposed at the center of the adjustment water area, and It has at least 1 silt fence stretched between an endless rope and the said floating body, and the drive device which carries out the circulation drive of the said endless rope, It is characterized by the above-mentioned.

  According to the invention of claim 4, the installation location and the number of installation of the rope guide member, and the length of the silt fence can be easily adjusted according to the width of the set adjustment water area, Therefore, the suspended matter collecting apparatus according to the present invention can cope with the removal of suspended matter in various areas of water, and can be easily installed by relatively simple work regardless of the size of the adjusted water area. Can do.

  As in claim 5, in the apparatus according to claim 4, if the rope guide member is a pulley having a substantially vertical rotation shaft, the endless rope circulation operation is reliably brought about by a simple installation operation. Can do.

  As in claim 6, in the apparatus according to claim 4 or 5, the driving device is a rotary drum in frictional contact with the endless rope at an intermediate position between the two rope guide members, and the rotation A suction hose connected to the suction port forming member and for pumping the suspended matter-containing water sucked from the suction port to the suspended matter treatment device, and having a suspension motor containing the suspended matter The turbidimeter and the electric motor are connected via a control device that controls the rotation of the electric motor in accordance with a turbidity signal from the turbidimeter. If connected, the endless rope can be circulated and driven electrically reliably, and the suspended turbidity is automatically removed from the adjusted water area by the action of the turbidimeter and control device. Achieved.

  According to a seventh aspect of the present invention, in the apparatus according to any one of the fourth to sixth aspects, the suction port forming member has a cylindrical member that takes a posture perpendicular to the water surface, and the suction port is If the suction port forming member having the cylindrical member is supported by the floating body so as to be movable up and down, it is formed over substantially the entire circumferential direction of the cylindrical member. Due to the suction of the suspended matter, a water flow toward the suction port is generated all around the suction port, and the effect of inducing and collecting the suspended material toward the suction port is increased, and the water depth of the suction port is increased. By adjusting the directional position, the suction effect can be enhanced by arranging the suction port in the distribution layer having the highest suspended solid concentration.

  The apparatus according to any one of claims 4 to 7, wherein the silt fence is stretched between the floating body and the endless rope, and the float. If the suspending length of the skirt is selected to be longer than the suspended area of suspended solids in the depth direction, the entire distribution range in the depth direction is suspended. The action of the skirt portion is uniformly applied to the turbid material, and the suspension material induction is effectively achieved throughout the entire area including the water depth direction.

  According to the present invention, even when a wide range of adjusted water is set, the action of inducing and concentrating suspended solids toward the suction port is easily brought about by relatively simple equipment and work. It is extremely useful economically.

  Hereinafter, the embodiment of the suspended substance collection method and apparatus according to the present invention will be described by taking, as an example, the case of collecting a giant sea urchin as a suspended substance from an adjusted water area set in a castle moat. In the drawings, FIG. 1 is a schematic diagram showing a plan view of the device of the present invention arranged to carry out the method for collecting suspended solids according to the present invention, and FIG. 2 is an enlarged view of a portion in a circle U in FIG. FIG. 3 is a perspective view showing a relationship between an endless rope, a rope guide member (pulley) and a silt fence constituting the apparatus of the present invention, and FIG. 3 shows a floating body according to the apparatus of the present invention supporting one end of the silt fence. It is a schematic side view.

  The illustrated apparatus is a transferable work yard D installed on one shore B of a moat A with two shores B and C, and a transferable sea cucumber recovery device E installed on the shore B adjacent to the work yard D. , And one end is connected to the following suction port, the other end is connected to the above-mentioned sea cucumber recovery device E, and arranged so as to cooperate with the suction hose F provided with the suction pump P in the middle. Is done. The above-mentioned sea cucumber recovery device E separates water and water using a built-in polymer filter, discharges the separated sea cucumber to a storage container or the next processing step, and subject the separated water to a dissolved oxygen amount increasing process. Then, it acts to return to the moat A through the water discharge pipe G.

  As described above, the suspended matter collecting apparatus 1 according to the present invention, which cooperates with the facilities D, E, F, G, and P, includes four pulleys (disk-shaped constant pulleys) 2a, 2b, 2c as rope guide members. 2d, the endless rope 3 sequentially bridged between the pulleys, the floating body 5 holding the suction port forming member 40 having the suction port 4 (FIG. 3), and bridged between the floating body 5 and the endless rope 3 And two silt fences 6a and 6b.

The pulleys 2a to 2d are installed on the shores B and C around the adjustment water area S that is set to collect the sea urchins in the moat A with an interval so as to surround the adjustment water area S. These pulleys have a substantially vertical rotating shaft 2b ₃ on top of a support piece 2b ₁ fixed to the ground by anchor pins 2b ₂ as shown in FIG. The rope 3 which is mounted so as to freely rotate in a horizontal posture and thus engages with the guide groove of the pulley 2b is changed in the horizontal direction by the pulley 2b. The same applies to the other pulleys 2a, 2c, 2d.

  The endless rope 3 that is looped over the pulleys 2a to 2d is sandwiched between two rotating drums 7a and 7b disposed in the work yard D, and is in frictional contact with each other. The rope 3 is driven to circulate in the longitudinal direction. The rotary drums 7a and 7b are rotated by an electric motor 8, and the rotation of the motor 8 is controlled by a control device 9, which is connected to a suction hose F on the downstream side of the suction pump P. It is made to receive a signal from.

The silt fence has a long float portion 6a ₁ and a skirt portion 6a ₂ depending from the float portion, as specifically shown in FIGS. 2 and 3, taking the silt fence 6a as an example. The float portion 6a ₁ is preferably a solid body having a circular cross section, but may have another cross sectional shape or may be hollow. The material of the float part is preferably styrene foam, but may be other resin materials. The skirt 6a ₂ is made of, for example, canvas, and a weight is attached to the lower end. The drooping length of the skirt portion is set to a length sufficient to cover the range in consideration of the distribution range or floating range of the sea cucumber in the water depth direction.

As shown in FIG. 2, one end of the float 6a ₁ is coupled to the endless rope 3 via a connecting rope 6a ₃ and a fixture 6a ₄ . The attachment 6a ₄ is bent so that the connecting rope 6a ₃ can escape the pulley 2b when passing through the pulley 2b, and can further escape and pass through the rotating drum 7.

The other end portion of the float portion 6a ₁ shown in FIG. 3 to a smaller scale than that in FIG. 2 is coupled to a support member 5a that is rotatably provided at the center upper portion of the floating body 5 by a connecting rope 6a ₅ . Has been. In this way, the silt fence 6a is stretched between the endless rope 3 and the floating body 5.

  The above-described configuration and connection state of the silt fence 6a are the same for the silt fence 6b.

  As shown in FIG. 3, the floating body 5 includes a frame body 5b and a floating member 5c attached to the frame body 5b, and a support base 5d is provided above the frame body 5b. The support member 5a is rotatably supported on the upper portion of the support base.

As shown in FIG. 3, the floating body 5 holds a suction port forming member 40 having the suction port 4 in a horizontal frame portion 5 b _{1 so} as to be movable up and down. It is made to come. The suction port forming member 40 has a cylindrical member 40a having an axis perpendicular to the water surface, and a disk-like lid that is horizontally attached to the upper portion of the cylindrical member and further projects radially from the cylindrical member. The suction port 4 is formed as a plurality of openings around the upper range of the cylindrical member 40a adjacent to the disc-shaped lid 40b. The lower part of the cylindrical member 40a is connected to the suction hose F via a connecting member 40c. Therefore, the water that is sucked together with water from the suction port 4 into the cylindrical member 40a is connected to the suction hose F via the connecting member 40c. It is conveyed to.

  Next, a method of collecting the sea cucumber drifting widely in the water area by the suspended substance collecting apparatus 1 constructed and arranged as described above will be described mainly with reference to FIG.

  In order to divide the set adjustment water area S from the other water areas of the digging A, the pollution prevention screens Ha and Hb are stretched between the shores B and C in advance as shown in FIG. Next, when the motor 8 in the work yard D is started, the rotating drums 7a and 7b are rotated, and the endless rope 3 sandwiched between the two rotating drums and in frictional contact with each other is rotated according to the rotation of the rotating drums 7a and 7b. For example, it is circulated in the direction of arrow T.

  The silt fences 6a and 6b, one end of which is connected to the endless rope 3, are swung around the floating body 5 in accordance with the circulation movement of the endless rope 3. At this time, the rotation of the silt fences 6a and 6b is faster on the side closer to the outer endless rope 3, and is slower on the side closer to the inner floating body 5, and the flow of water is faster to slower due to the difference in rotational speed. In other words, a water flow from the endless rope 3 side toward the floating body 5 is generated along the silt fences 6a and 6b. As a result, the sea urchin floating in the water area S is placed on the water flow and guided to the floating body 5 direction. The concentration of the sea urchin near the inlet 4 gradually increases.

  Further, when the pump P is operated, a fluid flow is generated around the suction port 4 as the fluid flows into the suction port 4, and this flow cooperates with the water flow generated by the silt fence, so To increase. At that time, if the operating member 50 (FIG. 3) is operated to adjust the water depth position of the suction port forming member 40 in the vertical direction so that the suction port 4 is positioned in the distribution layer having the highest blue-water concentration, Collection efficiency is further increased. In addition, when the position of the suction port 4 is made to correspond to the large-amount high-concentration layer as described above, the plate-shaped lid body 40b sucks the fluid in the layer with a relatively thin aqua-containing portion above the plate-shaped lid body. Blocks into the mouth 4.

Since the skirt portion 6a ₂ (FIGS. 2 and 3) of the silt fence is determined so that the drooping length in the direction of water depth sufficiently covers the distribution range or the entire floating range of the watermelon, the plane of the water area S If almost all the sea cucumbers floating in the direction of spread and depth can be put on the water flow by the silt fence, and if a weight is attached to the lower part of the skirt part, the sea cucumber inducing effect by the skirt part 6a ₂ is further increased. Enhanced.

  In this way, a fluid containing a high concentration of aquatic is sucked from the inlet 4, and aquatic can be efficiently collected from the water area S. The sucked fluid is transported to the water recovery device E through the suction hose F as described above.

  When aquatic sampling in the water area S progresses and the turbidity of the fluid measured by the turbidimeter 10 reaches the above allowable value set as a guideline for achieving purification, the turbidimeter 10 sends a signal to the controller 9. The feeding and control device 9 stops the motor 8. If the control device 9 is also connected to a motor (not shown) for driving the pump P, the operation of the pump P is also stopped at the same time, and thus the purification of the water area S is achieved.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of invention. For example, although two silt fences are shown, there may be one or more than three.

It is a figure which shows the installation condition of the suspended solids collection apparatus by this invention planarly. It is a perspective view which expands and shows the part in the circle | round | yen U in FIG. It is a side view which shows the structure of the outline of a floating body, and the connection state of a floating body and a silt fence.

Explanation of symbols

1 Suspended material collection device 2a, 2b, 2c, 2d Rope guide member (pulley)
3 Endless rope 4 Suction port 5 Floating body 5a Support member 6a, 6b Silt fence 7a, 7b Rotating drum 8 Motor 9 Control device 10 Turbidimeter 40 Suction port forming member 50 Actuating member A Moat B, C Shore D Work yard E Suspension Material processing equipment
F Suction hose G Drain pipe S Adjustable water area P Suction pump

Claims (8)

In the suspended matter collection method for guiding suspended substances drifting in a wide area in the water area toward the collection inlet, and collecting by suction from the inlet,
A plurality of rope guide members are arranged at intervals in the circumferential direction around the adjusted water area set to collect the suspended matter,
Rope is passed over these rope guide members one after another, endless rope stretched in an annular shape,
A floating body that holds the suction port is disposed at the center of the set water area,
A silt fence is stretched between the floating body and the endless rope,
The endless rope is circulated and driven under the guidance of the rope guide member, whereby the silt fence is swung along the surface of the water area around the floating body, and the suction is sucked into the water area by the revolving silt fence. A method for collecting suspended solids, characterized in that a water flow toward the mouth is generated, and suspended solids suspended in the water area are placed on the water flow and guided to the suction port.   The suspension according to claim 1, wherein the suspension material is sucked from the suction port so as to generate a water flow from all directions around the floating body in a direction along the water surface toward the suction port. Substance collection method. Measure the turbidity of suspended solid-containing water sucked from the inlet,
Continue turning the silt fence until the turbidity reaches an allowable value set as a guideline for purification.
The suspended substance collection method according to claim 1 or 2, characterized in that. In the suspended matter collection device that guides the suspended matter drifting in a wide area in the water area to the suction port for collection, and sucks and collects it from the suction port.
A plurality of rope guide members arranged at intervals in the circumferential direction around the adjusted water area set to collect suspended solids;
An endless rope that is sequentially stretched over the plurality of rope guide members and stretched annularly;
Holding a suction port forming member forming the suction port, and a floating body disposed in a central portion of the adjustment water area;
At least one silt fence stretched between the endless rope and the floating body;
A driving device for circulatingly driving the endless rope;
Suspended substance collection device characterized by having.   The suspended material collecting apparatus according to claim 4, wherein the rope guide member is a pulley having a substantially vertical rotation axis. The driving device includes a rotating drum that is in frictional contact with the endless rope at an intermediate position between the two rope guide members, and an electric motor that rotationally drives the rotating drum;
A suction hose connected to the suction port forming member and pumping the suspended matter-containing water sucked from the suction port to the suspended matter treatment apparatus is connected to a turbidimeter for measuring the turbidity of the suspended matter-containing water. And
The turbidimeter and the electric motor are connected via a control device that controls the rotation of the electric motor in accordance with a turbidity signal from the turbidimeter.
The suspended substance collection device according to claim 4 or 5, wherein   The suction port forming member has a cylindrical member that takes a posture perpendicular to the water surface, and the suction port is formed over substantially the entire circumferential direction of the cylindrical member, and has the cylindrical member. The suspension collection device according to any one of claims 4 to 6, wherein the suction port forming member is supported by the floating body so as to be movable up and down. The silt fence has a float portion that is stretched between the floating body and the endless rope, and a skirt portion that hangs down from the float portion,
The hanging length of the skirt portion is selected to be longer than the suspended range of suspended solids in the water depth direction,
The suspension collecting apparatus according to any one of claims 4 to 7, wherein

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