JP3763789B2 - Mud removal system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floating mud removal system used to remove floating mud in the vicinity of the bottom of a purification target water area in order to improve the water quality of the water area.
[0002]
[Prior art]
Japanese Patent Application No. 2001-141283 proposes a method for improving water quality in a closed water area. In this water quality improvement method, attention is paid to bottom water in a closed water area, and water quality is improved by performing treatment mainly.
[0003]
[Problems to be solved by the invention]
The method of treating mainly bottom layer water can increase the efficiency of water quality improvement, reduce the generation of materials that require disposal, and reduce the amount of water to be treated. There are many advantages such as enabling miniaturization of the device. However, in eutrophied waters, a sediment layer consisting of a sludge bottom mud layer and a floating mud layer formed by phytoplankton grown by eutrophication and dead bodies of aquatic plants is formed at the bottom of the water. For this reason, even if the treatment is mainly performed on the bottom layer water, it is actually difficult to avoid inhaling a part of the bottom sediment, in particular, floating mud with the intake of the bottom layer water. On the other hand, for floating mud that forms a floating layer or a soft layer close to it, it would be more efficient to improve the water quality by removing it in parallel with the intake of bottom water. Conceivable.
[0004]
From such a viewpoint, a system for efficiently removing floating mud is required. The present invention has been made based on such a demand, and an object thereof is to provide a floating mud removal system that enables efficient removal of floating mud.
[0005]
[Means for Solving the Problems]
  For the above purpose, the present invention includes a work ship floated in the purification target water area, and a mud suction device that sucks up floating mud at the bottom of the purification target water area and sends it to the work ship. The floating mud suction means and the self-propelling means are provided, and the floating mud-containing suction fluid is sucked by the floating mud suction means while traveling on the bottom of the water by the self-propelled means to collect the mud sludge. In the floating mud removal system, the self-propelled means is configured by attaching traveling wheels to the four corners of a frame frame formed in a generally box shape, and the floating mud content in the suction fluid is always constant in each traveling wheel. A height adjustment mechanism for adjusting the height position of the housing frame is provided for the control described above.
[0006]
The third stage includes a shield casing formed in a sealed box shape, and is configured by providing a stirrer inside the shield casing. The stirrer has a thickness of a floating mud layer at the bottom of the purification target water area. The vertical position can be adjusted according to the above.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described. The floating mud removal system according to the present invention includes, as a basic configuration, a work ship that floats in the purification target water area, and a mud suction device that collects floating mud at the bottom of the purification target water area and sends it to the work ship. The What is important in such a sludge removal system of the basic configuration is how to prevent the sludge from spreading to the upper layer of the water area during the sludge inhalation work as well as efficient removal of the sludge. That's what it means. In connection with efficiently preventing the floating mud from spreading, the mud absorbing device can have several structures. Moreover, the continuous method and the batch method (intermittent method) can be considered for the floating mud suction work by the mud absorber, and the mud absorber can have several structures according to this.
[0011]
1 and 2 show a part of the configuration of the mud removal system according to the first embodiment. The mud absorbing device 1 of the floating mud removal system has a self-propelling means 2 and is a system for continuously performing floating mud suction work while traveling on the water bottom by the self-propelling means 2. The self-propelled means 2 has a configuration in which traveling wheels 4 that are driven by, for example, a hydraulic motor or an electric motor are attached to four corners of a frame 3 formed in a generally box shape. Each traveling wheel 4 is provided with a height adjusting mechanism using a cylinder 5 as a driving source, and the height of the housing frame 3 can be adjusted by the height adjusting mechanism. This height adjustment mechanism also functions to cope with the unevenness of the underwater ground.
[0012]
Further, the mud absorbing device 1 has floating mud suction means 7. The floating mud suction means 7 is provided in a plurality of suction pipes 9 extending in a octopus shape from the nodal portion 8, a shielding casing 10 to which the suction pipes 9 are connected, and a shielding casing 10. It consists of a stirrer 11 (not shown in FIG. 2), and a mud feeding hose 13 extending from the work ship 12 is connected to the knot portion 8 with a density meter 14 interposed. The shielding casing 10 is formed in a sealed box shape, and an introduction port 15 is provided on a side surface thereof facing the traveling direction of the mud absorbing device. The stirrer 11 is formed in the shape of a rotating brush, and the vertical position can be adjusted according to the thickness of the floating mud layer F. The stirrer 11 functions to forcibly raise the mud by its rotation. The forced soaking process of the mud is for inhaling only fine things except those having a coarse particle size. In other words, if the mud is forcedly lifted up, fine particles will remain floating, but coarse ones will fall off immediately, so that the particle size can be selected, and this allows the fine particles that need to be removed to float. It becomes possible to inhale mud intensively. The floating mud suction means 7 guides the floating mud from the introduction port 15 to the inside of the shielding casing 10 as the mud absorbing device 1 travels, and the floating mud is sucked by the suction pipe 9 while being stirred by the rotating stirring body 11. Inhale. In other words, the mud absorbing device 1 is a self-running introduction type in which suction is performed while floating mud is introduced into the shielding casing 10 by traveling. For this reason, it becomes possible to perform suction | inhalation operation | work, fully suppressing spreading | diffusion of floating mud to the upper layer of a water area.
[0013]
Although not shown, a buoyancy tank is attached to the mud absorbing device 1, and the apparent weight of the mud absorbing device 1 can be adjusted by adjusting the buoyancy with this buoyancy tank. . Thereby, the burden on the traveling wheel 4 can be reduced, and the sinking into the bottom mud below the mud layer F and the rising of the floating mud by the traveling wheel 4 can be suppressed.
[0014]
The work of sucking and removing floating mud by this mud removing system is performed as follows. The work starts by first hanging the mud absorbing device 1 from the work ship 12 to a target position. The target position is specified using, for example, a positioning means such as a GPS system attached to the mud absorbing device 1. When positioning of the starting position of the mud absorbing device 1 is completed, the floating mud layer F is then confirmed. For the confirmation of the floating mud layer F, the sounding instrument 16 attached before and after the mud absorbing device 1 is used. It is usual to use a sound wave type as the sounding instrument 16.
[0015]
If the floating mud layer F is confirmed, the conditions according to it will be set to the mud suction apparatus 1. FIG. Then, the suction pump (not shown) mounted on the work boat 12 is started and the mud suction device 1 is run to start sucking the mud. Continue inhaling. During the suction work of floating mud, the density of the suction fluid is measured with the density meter 14. The suspended mud content can be measured, for example, as the density or turbidity of the suction fluid. The control system of the work ship 12 always performs control for inhaling at a constant floating mud content based on this measurement result. As parameters in this control, the height position of the floating mud suction means 7, that is, the height of the housing frame 3, the suction flow rate of the suction pump, and the traveling speed of the mud suction device 1 are mainly used. Further, while the mud absorbing device 1 is running, the work status is also monitored using the illuminator 17 and the monitoring camera 18 attached to the mud absorbing device 1. When the work is completed for the predetermined range, the mud absorbing device 1 is once lifted by the work ship 12 and moved to the start position of the next work range. The same work is performed there, and the target purification target area is repeated while repeating these series of work. The entire mud removal process is performed.
[0016]
3 and 4 show the configuration of the mud removal system according to the second embodiment. This floating mud removal system is basically the same as that in the first embodiment. The different point is the floating mud suction means 22 of the mud absorbing device 21. The floating mud suction means 22 in this example is a rotary slit type. Specifically, it consists of an intermediate cylinder 23, an introduction slit 24, and a revolving body 25. The intermediate cylinder 23 is attached to the housing frame 3 so as to be rotatable around its axis, and a mud feeding hose 13 is connected to a side surface of the intermediate cylinder 23 with a density meter 14 interposed. The introduction slit 24 has a flat hopper structure having a wedge-shaped cross-sectional shape, and one end side thereof is connected to the arc surface of the revolving body 25 and the other end is connected to the intermediate cylinder 23. The swivel body 25 has a semicircular cross-sectional shape, and a slit opening 26 is formed at a connection portion of the introduction slit 24. The revolving body 25 is supported by the intermediate cylinder 23 through the introduction slit 24 and is connected to the cylinder 27 attached to the housing frame 3. The revolving body 25 receives the driving force of the cylinder 27 and receives an arrow A in FIG. In this way, the height position of the slit opening 26 can be changed.
[0017]
In the sludge removal system, the sludge is sucked and removed while the sludge containing suction fluid is introduced from the slit opening 26 into the introduction slit 24 according to the running of the sludge suction device 21. In addition, by combining the height adjustment of the slit opening 26 with the height adjustment of the frame 3, except that the suction work can be advanced while controlling the suction height position with respect to the floating mud layer F more accurately, Basically, it is the same as that in the first embodiment. Therefore, the elements common to the first embodiment are denoted by the same reference numerals, and description of the configuration and operation is omitted.
[0018]
5 and 6 show the configuration of the mud removal system according to the third embodiment. This floating mud removal system is also different from that of the first embodiment only in the configuration of the floating mud suction means 32 of the mud absorbing device 31 as in the second embodiment. The floating mud suction means 32 in this example has a scraping screw 33 driven by a hydraulic motor. The scraping screw 33 is provided at a rear end portion of the skirt 34 formed in a box shape having an open front surface and a bottom surface. The upper surface of the skirt 34 is connected to the mud feeding hose 13 from the work ship 12 via the density meter 14 so as to correspond to the center of the scraping screw 33, and the floating mud in the range partitioned by the skirt 34 is connected. The mud hose 13 sucks up the scraping screw 33 to the center. Since other configurations and operations are the same as those in the first embodiment, common elements are given the same reference numerals, and descriptions thereof are omitted.
[0019]
7 and 8 show the configuration of the mud absorbing device in the floating mud removal system according to the fourth embodiment. This mud absorbing device 41 has crawler type self-propelled means 42. Specifically, as shown in FIG. 7, the self-propelling means 42 has a configuration in which a pair of left and right traveling units each including an endless rotating belt 45 is provided around a rear driving pulley 43 and a front driven pulley 44. Yes. Further, the endless rotating belt 45 has a large number of fins 47 protruding from its outer surface so as to be deformed when subjected to a load exceeding a certain level.
[0020]
Further, as shown in FIG. 8, the mud suction device 41 includes floating mud suction means 51 having a structure in which a pair of left and right suction / delivery units 49 are connected to the rear part of the skirt 48. The skirt 48 is formed in a box shape having an open front surface and a bottom surface, and is provided so as to cover the self-propelled means 42. The center of the skirt 48 is partitioned by a partition plate 52, and a floating mud suction zone is defined corresponding to each of the left and right traveling units. The suction / delivery unit 49 has a pump 54 that is driven by a hydraulic pump 53, and the pump 54 sucks floating mud and delivers it to a work ship (not shown). For this purpose, the suction / delivery unit 49 is connected to the mud supply hose 13 from the work ship, and the density meter 14 is interposed in the middle thereof.
[0021]
Further, the mud absorbing device 41 is provided with a ballast tank 55 at the upper part of the skirt 48 and auxiliary sleds 56 on both sides of the skirt 48. These ballast tank 55 and auxiliary sled 56 function to tilt the front side of the mud absorbing device 41 as shown in FIG. This is a function for obtaining an optimal suction height position according to the thickness of the floating mud layer F, and this function makes it possible to perform the floating mud suction work more efficiently. The ballast tank 55 also functions for buoyancy adjustment. With this function, the apparent weight of the mud absorbing device 41 can be changed depending on whether the floating mud layer F is light or heavy, and more appropriate working conditions can be set.
[0022]
The work of sucking and removing floating mud by the floating mud removing system as described above is basically the same as that in the first embodiment. However, as the endless rotating belt 45 rotates during traveling, the fins 47 push the mud mud toward the suction / delivery unit 49 while scraping it. For this reason, there exists the characteristic that the suction | attraction of floating mud can be made more efficiently. During the work, the positioning of the mud absorbing device 41 at the bottom of the water, the confirmation of the floating mud layer F, the monitoring of the working state, etc. are performed as in the first embodiment. The sounding instrument 16, the illuminator 17, and the monitoring camera 18 are attached to the mud absorbing device 41.
[0023]
FIG. 9 shows the configuration of the mud absorbing device of the floating mud removal system according to the fifth embodiment. This floating mud removal system is a system in which the mud sucking and removing work is performed while towing the mud absorbing device 62 on the work ship 61. As shown in FIGS. 10 to 13, the mud absorbing device 62 has a structure in which a floating mud suction means 64, a buoyancy adjusting means 65, and a sliding means 66 are attached to a flat frame frame 63. A traction portion 67 is provided at the front end of the frame 63, and a traction wire 68 from the work boat 61 is connected to the traction portion 67 (FIG. 9) so as to receive a traction force. As shown in FIG. 13, the floating mud suction means 64 includes a suction port 69 provided at the rear end portion of the housing frame 63 and a suction pipe 71 extending from the suction port 69 to the front end portion of the housing frame 63. A mud feeding hose 72 from the work ship 61 is connected to the suction pipe 71 (FIG. 9). The buoyancy adjusting means 65 includes a neutral buoyancy tank 73 attached to the central portion of the housing frame 63 and a posture control buoyancy tank 74 attached to each of the four corners of the housing frame 63. The buoyancy adjusting means 65 functions to adjust the buoyancy so that the mud absorbing device 62 is in light contact with the ground at the bottom of the water, and also functions to control the attitude of the mud absorbing device 62. The function is mainly borne by the neutral buoyancy tank 73, and the latter function is borne by the attitude control buoyancy tank 74. The sliding means 66 is formed by a sliding plate 75. The planing plate 75 includes an inclined portion 76 and a flat surface portion 77 raised to a front inclination, and the distal end of the inclined portion 76 is fixed to the distal end portion of the housing frame 63. It is fixed on the side. Although illustration is omitted, as in the first embodiment, the mud suction device 62 is provided with positioning means, a sounding instrument, monitoring means, a density meter, and the like.
[0024]
The work of sucking and removing floating mud by this mud removing system is performed as follows. First, the mud absorbing device 62 is hung from the work ship 61 to a target position. The target position is specified by using positioning means attached to the mud absorbing device 62. After positioning of the starting position of the mud absorbing device 62 is completed, the mud layer is checked using a sounding instrument, and conditions corresponding to the mud layer 62 are set in the mud absorbing device 62. Then, the suction pump 78 mounted on the work ship 61 is operated, and the work ship 61 is moved in a predetermined direction to start the work for sucking and removing floating mud, while moving the work ship 61 with respect to a predetermined purification target region. Proceed with work.
[0025]
Here, in the present embodiment, the suction port 69 of the mud mud suction means 64 is provided at the rear end portion of the housing frame 63, but instead, it may be provided at the front end portion of the housing frame 63. However, the structure in which the suction port 69 is provided at the rear end portion of the frame 63 can suck the suspended mud disturbed by the movement of the mud absorbing device 62, and the suspended mud diffuses as the mud is sucked and removed. There is an advantage that it can be effectively suppressed.
[0026]
FIG. 14 shows the configuration of the mud removal system according to the sixth embodiment. This mud removal system includes a work ship 81, a support device 82 mounted on the work boat 81, and a mud suction device 83 supported by being suspended by the support device 82. The support device 82 takes the form of a crane, for example. The crane-type support device 82 is preferably provided with a vertical motion absorbing mechanism 84 for suppressing the influence of vertical motion due to the pitching of the work ship 81 from reaching the mud absorbing device 83. As shown in FIGS. 15 and 16, the mud suction device 83 is fixed to the floating mud suction port 86 and the floating mud suction port 86 connected to the tip of the mud pipe 85 extending from the work ship 81. Mainly a floating mud suction means 88 comprising a skirt 87. The skirt 87 has a function of partitioning and shielding the periphery of the floating mud suction port 86 as a floating mud suction zone, is formed in a box shape having an open bottom surface, and is fixed to the floating mud suction port 86 through the upper surface. Yes. The skirt 87 is formed by a shutter 89 that can be opened and closed on each side of its four circumferences. Specifically, the shutter 89 is supported by an opening / closing means 90 using, for example, a slide mechanism, and can open and close the side surface of the skirt 87 by moving up and down.
[0027]
In order to perform the suction mud removal work with this mud removal system, the mud suction device 83 is first suspended from the work ship 81 on the bottom of the water by the support device 82, and is positioned and placed at the target work start location. At this time, the mud layer F is confirmed by the sounding instrument 16 attached to the mud absorbing device 83, and the optimum height position of the mud absorbing device 83 is also determined. Then, the mud is sucked and removed at that location. During the work of sucking and removing the mud, the four-round shutter 89 is lowered and closed in order to partition and shield the area around the mud mud inlet 86 as a mud mud suction zone. Further, during the suction and removal work, the buoyant mud content rate of the sucked fluid is measured by the density meter 14 attached to the mud mud suction port 86, and control is performed to always perform suction at a constant buoyant mud content rate.
[0028]
When the work at the place is completed as described above, the mud absorbing device 83 is moved to the next place. This movement is performed by operating the support device 82 to cause the mud absorbing device 83 to swing at the bottom of the water. During the swing operation, the shutter 89 in the swing direction (the direction of the arrow in FIGS. 15 and 16) is lifted. An open state is set (the state shown in FIGS. 15 and 16). After moving to a new location in this way, the floating mud is sucked and removed in the same manner as above. Thereafter, the suction removal operation in the stationary state and the movement of the mud absorbing device are alternately repeated to perform the process on the entire area to be purified.
[0029]
Such a method can be said to be a batch method, whereas the floating mud removal system according to each of the above embodiments is a continuous method. In this embodiment, the mud absorbing device is moved by a swing operation in a batch system. For this reason, it becomes possible to work more efficiently than the method of lifting the mud absorbing device every time it is moved. In addition, a shutter 89 that can be opened and closed is provided on the skirt 87, and the shutter 89 is opened in the moving direction during the swing operation, so that the floating mud is disturbed and diffused around by the swing operation. Can be effectively suppressed.
[0030]
FIG. 17 shows the configuration of the mud removal system according to the seventh embodiment. This floating mud removal system includes a work ship 91, a support device 92 mounted on the work boat 91, and a mud suction device 93 supported by suspension on the support device 92. As in the fifth embodiment, a batch system is used. It is a method to work with. The mud absorbing device 93 includes a submersible pump 94, a jet generating means 95, and a skirt 96. The jet generating means 95 is formed by a jet pipe 97 connected to the tip of a high-pressure water supply hose (not shown) from the work ship 91 so that, for example, two jet parts 98 face the side surface of the submersible pump 94. Has been. The skirt 96 is formed so as to surround the submersible pump 94 and the jet generating means 95 as a floating mud suction zone.
[0031]
The work of sucking and removing floating mud by this mud removing system is performed as follows. First, the mud absorbing device 93 is suspended from the work ship 91 on the bottom of the water by the support device 92, and is positioned and placed at the target work start location. Then, the mud is sucked and removed at that location. The suction removal operation is performed while stirring the inside of the skirt 96 by jetting a jet from the jet generating means 95. Further, it is performed in a state where the suction amount of the submersible pump 94 and the jet flow rate from the jet generating means 95 are balanced. The agitation inside the skirt 96 serves to effectively prevent a “water supply” from being formed by suction by the submersible pump 94 resulting in a state in which only the water around the floating mud layer is drawn. On the other hand, the balance between the suction amount and the jet flow rate functions to efficiently perform suction removal without leaking floating mud inside the skirt 96. In addition, the jet pressure and angle of the jet can be adjusted according to the state of the floating mud layer, and by performing such control, the accuracy of removing the mud can be improved. When the work at that place is completed as described above, the mud absorbing device 93 is once lifted by the support device 92 and moved to the next place, and the same work is repeated. Thereafter, the suction removal operation in the stationary state and the movement of the mud absorbing device are alternately repeated to perform the process on the entire area to be purified.
[0032]
FIG. 18 shows a configuration of the mud absorbing device in the floating mud removal system according to the eighth embodiment. The mud absorbing device 101 includes a floating mud suction means 102 and a fixed frame 103. The floating mud suction means 102 is formed by attaching a floating mud suction port 105 to the tip of a mud feeding hose 104 extending from a work ship (not shown). The floating mud suction port 105 is formed in a cone shape, and is provided with a skirt portion 106 standing upright at the tip thereof. The skirt part 106 is for making the suction state uniform over the upper and lower sides of the mud layer, and is about the height of the mud layer in the purification target water area. The fixed frame 103 is formed in a cross-girder structure provided with spuds 107 for fixing to the ground of the bottom of the water by piercing it, and a subsidence prevention plate 108 for preventing subsidence is attached to the spud 107. Yes. A telescopic suspension arm 109 is attached to the fixed frame 103, and the suction port 105 is supported via the suspension arm 109 so that the vertical position can be adjusted.
[0033]
The work of sucking and removing floating mud by this mud removing system is performed as follows. First, a mud absorbing device 101 is suspended from a work ship (not shown) by a supporting device at a target work start location at the bottom of the water, and the fixed frame 103 is fixed to the ground at the bottom of the water. Then, the mud is sucked and removed at that location. The suction removal operation is performed by optimally adjusting the support height position of the sludge suction port 105 by the fixed frame 103 according to the state of the sludge layer. When the work at that place is completed as described above, the mud absorbing device 101 is once lifted by the work ship and moved to the next place, and the same work is repeated. Thereafter, the suction removal operation in the stationary state and the movement of the mud absorbing device are alternately repeated to perform the process on the entire area to be purified. As described above, the method of supporting the floating mud suction means 102 by the fixed frame 103 fixed to the ground of the water bottom can substantially cut off the support relationship to the floating mud suction means 102 from the work ship. It is not necessary to affect the floating mud sucking means 102 due to the swaying of the wind, and more stable floating mud sucking work is possible. Also in this mud removal system, as in each of the above embodiments, positioning of the mud absorber at the bottom of the water, confirmation of the mud layer, measurement of the mud content of the suction fluid with a density meter, monitoring of the working state, etc. However, details of the description are omitted.
[0034]
FIG. 19 shows another example of the floating mud inlet that can be applied to the mud absorbing device in the eighth embodiment, for example. The floating mud suction port 201 is provided with a sealed expansion chamber 203 on the skirt portion 202. A plurality of suction pipes 204 are suspended from the lower surface of the expansion chamber 203, and each suction end faces the skirt portion 202. A connecting portion 205 is provided on the upper surface of the expansion chamber 203, and a mud feeding hose from a work ship is connected to the connecting portion 205.
[0035]
The floating mud suction port 201 can uniformly suck the floating mud from a wide range by distributing the suction force by the plurality of suction pipes 204, and can improve the suction efficiency. In addition, since the pressure expansion chamber 203 can be interposed between the mud feeding hose that transmits the suction force from the work ship and the suction pipe 204, the suction power of each suction pipe 204 can be made uniform, and this functions and the suction power is increased. This is linked to further increasing the utility of dispersion. In addition, you may make it form a through-hole in the side surface in the skirt part 202 suitably. However, in that case, a skirt that further covers the mud mud suction port 201 is provided in the mud suction device.
[0036]
FIG. 20 shows a floating mud suction port according to another embodiment. The floating mud suction port 301 has a structure in which a conical skirt 303 is attached to a suction pipe 302 and floats in a state where the lower end of the skirt 303 is separated from the upper surface of the floating mud layer F by several to several tens of centimeters. A remote type designed to inhale mud. For this reason, as shown by arrows in the figure, floating mud is sucked from the surroundings beyond the range covered by the skirt 303. That is, the floating mud can be sucked in an area wider than the range covered by the skirt 303. In other words, this means that the size of the sludge inlet can be made relatively small in relation to the suction range of the sludge and the size can be reduced.
[0037]
As described above, in order to suck the floating mud while the lower end of the skirt 303 is separated from the upper surface of the floating mud layer F, it is necessary to lift the mud from the mud floating layer F by the suction input applied through the skirt 303. . According to experiments, it has been confirmed that if the flow rate of about 20 cm / sec can be formed in the floating mud-containing water by suction force, the floating mud can be lifted up.
[0038]
FIG. 21 shows another remote type floating mud suction port 301a. The floating mud suction port 301 a is provided with a turbulent flow forming portion 304 at the lower end edge of the skirt 303. The turbulent flow forming section 304 is formed by attaching a plurality of obstacles 305 formed in a cylindrical shape at regular intervals so as to be suspended from the lower end edge of the skirt 303. This turbulent flow forming unit 304 disturbs the flow of floating mud-containing water that is sucked from the surroundings beyond the range covered by the skirt 303 to generate turbulent flow. This turbulent flow works to raise the floating mud, and as a result, the floating mud can be raised more efficiently to increase the suction efficiency of the floating mud. The turbulence also functions to make the turbidity of floating mud-containing water sucked into the suction pipe 302 constant. This contributes to increasing the efficiency of the floating mud separation and removal treatment on the work ship.
[0039]
About such a turbulent flow formation system, it can also be set as the floating mud inlet 301b as shown in FIG. The floating mud suction port 301 b is provided with a water flow wheel 306 at the lower end of the skirt 303. This water turbine 306 rotates in response to the flow of floating mud-containing water on the same principle as a wind turbine. The rotation functions to stabilize the turbidity of the floating mud-containing water sucked into the suction pipe 302.
[0040]
【The invention's effect】
As described above, according to the present invention, a floating mud removal system that can efficiently remove and remove the floating mud while effectively suppressing the diffusion of the floating mud to the upper water layer is realized. By using this floating mud removal system, it is possible to efficiently perform the floating mud removal process performed in parallel with the low-layer water treatment, for example. Therefore, the present invention can greatly contribute to improvement of water quality such as in closed water areas.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a mud removal system according to a first embodiment.
2 is a perspective view of the mud absorbing device in FIG. 1. FIG.
FIG. 3 is a configuration diagram of a mud removal system according to a second embodiment.
4 is a perspective view of the mud absorbing device in FIG. 3. FIG.
FIG. 5 is a configuration diagram of a floating mud removal system according to a third embodiment.
6 is a perspective view of the mud absorbing device in FIG. 5. FIG.
FIG. 7 is a side view of a mud absorbing device in a floating mud removal system according to a fourth embodiment.
FIG. 8 is a plan view of the mud absorbing device of FIG.
FIG. 9 is a configuration diagram of a floating mud removal system according to a fifth embodiment.
10 is a side view of a mud absorbing device in the floating mud removal system of FIG. 9. FIG.
11 is a plan view of the mud absorbing device of FIG. 10;
12 is a side view of the mud absorbing device of FIG. 10 as viewed from the rear.
13 is a cross-sectional view taken along line AA in FIG.
FIG. 14 is a configuration diagram of a floating mud removal system according to a sixth embodiment.
15 is a side view of a mud absorbing device in the floating mud removal system of FIG. 14;
16 is a perspective view of the mud absorbing device of FIG. 15. FIG.
FIG. 17 is a configuration diagram of a floating mud removal system according to a seventh embodiment.
FIG. 18 is a side view of a mud absorbing device in a floating mud removal system according to an eighth embodiment.
FIG. 19 is a perspective view of a floating mud inlet according to another example.
FIG. 20 is a side view of a separated type floating mud suction port.
FIG. 21 is a side view of a separated type floating mud suction port according to another example.
FIG. 22 is a side view of a separated type floating mud suction port according to still another example.
[Explanation of symbols]
12, 61, 81, 91 Work boat
1, 21, 31, 41, 62, 83, 93, 101 Mud absorbing device
7, 22, 32, 51, 64, 88, 102
2, 42 Self-propelled means
65 Buoyancy adjustment means
66 Glide means
82, 92 Support device
86 Mud intake
87 Skirt
89 Shutter
94 Submersible pump
95 Jet generation means
103 fixed frame

Claims (2)

A work ship floated in the purification target water area , and a mud suction device that sucks and collects floating mud at the bottom of the purification target water area and sends it to the work ship. In the floating mud removal system configured to suck up floating mud containing suction fluid by the floating mud suction means while traveling on the bottom of the water by the self-propelled means ,
The self-propelled means is configured by attaching traveling wheels to the four corners of a box frame formed in a generally box shape, and for each of the traveling wheels, for the control to always keep the floating mud content in the suction fluid constant. A floating mud removal system characterized in that a height adjustment mechanism for adjusting the height position of the frame is provided. The floating mud suction means includes a shield casing formed in a sealed box shape, and is provided with a stirrer inside the shield casing. The floating mud removal system according to claim 1, wherein the vertical position can be adjusted according to the thickness of the layer.

Images