CN115949044A - Suspended matter recovery device - Google Patents

Abstract

The suspended solid recovery device of the present invention comprises: a recovery water tank for recovering suspended solids, which is installed on the apparatus main body so as to be able to rise and fall, and which includes a recovery chamber and a suction passage, the suction passage being disposed in front of the apparatus main body in the front-rear direction of the recovery chamber and connected to the recovery chamber, water containing the suspended solids being sucked into the recovery chamber via the suction passage; a suction pump connected to the collection water tank through a suction pipe, for sucking and collecting the water containing suspended solids in the collection water tank; and a control device for controlling the suction amount of the suction pump so that the suction flow rate at the suction port coincides with the traveling speed, based on the traveling speed of the suspended solid collection device, the width of the bottom surface of the suction port, which is the front port of the suction passage, and the water depth position. According to the present invention, the suction flow rate of the suction port is controlled to be equal to the traveling speed in accordance with the traveling speed and the water depth of the suction port, and thus the suspended solids can be efficiently collected.

Description

Suspended matter recovery device

Technical Field

The invention relates to the field of water surface treatment, in particular to a floating object recovery device.

Background

Currently, with the development of global economy, plankton in lakes, rivers and oceans is rapidly increasing. In particular, plastics do not decompose, and can be entwined with organisms, or eaten by the organisms by mistake, or covered by sediments and the like, so that the aquatic ecosystem is greatly influenced. In addition, water contamination due to accidents and illegal disposal of floating liquids such as oils also sometimes occurs. In addition, organisms and their debris floating on the water surface, such as duckweed, terrestrial plants, hay, deadwood, and particularly microorganisms (cyanobacteria, red tides), are toxic and can affect the health of humans or livestock that use the water containing these plankton as a source of drinking water. Therefore, a technique for efficiently recovering these suspended matters is required.

Conventional recovery techniques include a facility for directly sucking and recovering by using a submersible pump, a facility for directly sucking and recovering by installing a pipe at the end of a pump, a facility for recovering by installing a netpen between catamarans and pulling forward by a ship, and a facility for recovering while traveling on the water surface by being installed on a ship.

For the recyclates thinly distributed on the water surface, maintaining the horizontal stability of the water surface at the water intake is important for efficiently sucking the recyclate dense layer on the water surface. However, in the case where the recovery apparatus is mounted on a ship, for example, the ship is shaken by the influence of waves, and it is difficult to keep the level smooth, thereby affecting the collection of the recovered matter on the water surface.

The thickness and vertical distribution of the near-surface plankton high-density layer will be different according to the type of the plankton, the difference of the near-surface water temperature stratification condition, the buoyancy and vertical fluidity of the plankton, the horizontal aggregation effect of the water flow and the like, and will also change with the lapse of time. In contrast, conventionally, the thickness and vertical distribution of the high-concentration layer of suspended solids are manually determined by visual confirmation or measurement with a measuring instrument or the like in advance, and the vertical position of the suction port of the recovery device is adjusted by mechanical operation, so that it has been difficult to achieve effective recovery under optimum conditions.

Further, when the suction is performed by a recovery device equipped with a recovery device, the ship speed, the suction speed, and the like affect the suction efficiency.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a suspended solid recovery device that can efficiently recover suspended solids.

The present invention provides a suspended solid recovery apparatus for recovering suspended solids floating on a water surface while traveling on the water surface, the apparatus including: a recovery water tank for recovering suspended matters, which is installed on the device main body in a liftable manner and comprises a recovery cavity and a suction channel, wherein the suction channel is positioned in front of the device main body of the recovery cavity in the front-back direction and is connected with the recovery cavity, and water containing the suspended matters is sucked into the recovery cavity through the suction channel; a suction pump connected to the collection water tank through a suction pipe, for sucking the water containing suspended solids collected in the collection water tank; and a control device for controlling the suction amount of the suction pump based on the traveling speed of the floating matter recovery device, the width of the bottom surface of the suction port, and the depth of water so that the suction flow rate at the suction port is equal to the traveling speed, wherein the suction port is the front port of the suction passage.

According to the present invention, the suction flow rate of the suction port is controlled to be equal to the traveling speed in accordance with the traveling speed and the water depth of the suction port of the collection water tank, and thus the suspended solids can be efficiently collected.

Drawings

Fig. 1 is a schematic perspective view showing the structure of a suspended solid recovery apparatus according to an embodiment of the present invention;

fig. 2 is a schematic plan view showing the structure of a suspended solid recovery apparatus according to an embodiment of the present invention;

fig. 3A is a schematic front view showing a structure of the water quality water temperature measuring tank 6 when viewed from the front thereof;

fig. 3B is a side view schematically showing a structure when the water quality water temperature measurement tank 6 is viewed from its side;

fig. 3C is a schematic plan view of the structure of the water quality/water temperature measurement tank 6 viewed from above;

fig. 3D is a schematic diagram of a water quality and water temperature measurement tank 6' as a modification of the water quality and water temperature measurement tank 6.

FIG. 4 is a flowchart showing a method of setting the water depth at the bottom surface of the suction port based on the density of suspended solids and the water temperature;

fig. 5 (a) to (c) are schematic views illustrating a deflector structure according to the present embodiment;

fig. 6 (a) to (f) are schematic views showing deformation forms in each operation mode of the deflector structure according to the embodiment of the present invention;

fig. 7 is a flowchart illustrating a control method of a general action pattern of the guide plate structure according to an embodiment of the present invention;

fig. 8 is a flow chart illustrating a method of controlling a edgewise action mode of a baffle structure according to an embodiment of the invention.

Description of the symbols

1 hull part, 2 recovery water tanks, 5 treatment devices, 6 and 6 water quality and temperature measuring tanks, 11 floating body brackets,

12 floating bodies, 13 propellers for propulsion, 14 vibration damping devices, 15 workbenches, 16 lifting devices, 17 notches, 21 recovery cavities, 22 openings, 23 extension plates, 24 side baffle plates, 61 and 61' supporting frames, 62 and 62' measuring chambers 63, 63' level gauges, 64' water temperatures, water quality sensors, 65 vertical layer separation plates, 66' vertical rails, 71 first guide plate parts, 72 second guide plate parts, 73 distance sensors, 74 rotary driving mechanisms,

75 telescopic driving mechanism, 76 convex strip and 77 projecting part.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

The floaters recovery device according to the embodiment of the present invention is intended to recover floaters floating on the water surface, such as oil stains floating on the water surface, organisms and their remains, such as duckweed, severed branches of terrestrial plants, hay, withered trees, and especially microorganisms such as blue algae, red tide, and the like. For convenience of explanation, the blue algae and phytoplankton are mainly collected. However, the recovery object is not limited to this, and the same is also applicable to other suspended matters.

Fig. 1 is a schematic perspective view showing the structure of a suspended material collecting apparatus according to an embodiment of the present invention, and fig. 2 is a schematic plan view showing the structure of the suspended material collecting apparatus according to the embodiment of the present invention.

The suspended solid recovery apparatus according to the embodiment of the present invention is a ship-shaped structure, hereinafter referred to as a recovery ship, and includes a ship body 1 and a recovery water tank 2 attached to the ship body 1.

The recovery ship is provided with floating body supports 11 on opposite sides of a ship body 1, and floating bodies 12 and propulsion propellers 13 are mounted on both left and right floating body supports 11, so that the ship body 1 travels on the water surface by the rotational driving of the propulsion propellers 13 on both sides, and the ship body 1 is propelled to move straight by the simultaneous rotation of the propulsion propellers 13 on both sides at the same speed, and the steering operation of the ship body 1 is controlled in such a manner that the rotation speed of the propulsion propeller 13 on one side is greater than that of the propulsion propeller 13 on the other side. Alternatively, the two propeller blades 13 may be rotated in opposite directions to move backward.

A collection water tank 2 is vertically movably attached to the hull 1. Specifically, for example, the bow of the hull portion 1 is provided with a notch 17, and a table 15 is fixed to the top surface of the bow, and a lifting device 16 is mounted on the table 15, and the recovery water tank 2 is disposed in the notch 17 and mounted on the lifting device 16 so as to be raised or lowered by the lifting device 16. The lifting device 16 may be, for example, four vertical lifting electric cylinders, which are respectively fixed to the front and rear ends of the worktable 15, and the recovery water tank 2 may be fixed to the telescopic rods of the four vertical lifting electric cylinders by bolts or welding. Of course, the lifting device 16 may be any other lifting device, such as a hydraulic cylinder, a pulley lifting device, etc.

The recovery water tank 2 includes a recovery chamber 21, and an opening 22 is formed above the recovery chamber 21. The collection water tank 2 further includes an extension plate 23 extending forward at the edge of the opening 22 of the collection chamber 21, and left and right side plates 24 located on the left and right sides of the extension plate 23. The extension plate 23 and the left and right side fences 24 enclose a suction passage, the extension plate 23 constitutes the bottom surface of the suction passage, and the front end edge of the extension plate 23 constitutes the bottom surface of a suction port as the front port of the suction passage. The suction passage is connected to the opening 22, and suspended matter such as blue algae and phytoplankton and water are sucked into the collection chamber 21 from a suction port, which is a front end of the suction passage, through the suction passage and the opening 22. One end portions of the left and right side fences 24 are connected to left and right side walls of the opening 22. The left baffle plate and the right baffle plate 24 are arranged in a splayed mode, so that the outer opening formed by the left baffle plate and the right baffle plate is larger than the inner opening, a large amount of floating objects are guided into the recovery cavity 21 in the running process of the recovery ship, and the recovery efficiency of the floating objects is improved.

The extension plate 23 may be disposed horizontally or inclined downward as it goes outward from the edge of the opening 22 of the recovery chamber 21. This enables the suspended matter to rapidly enter the recovery chamber 21, thereby further improving the recovery efficiency.

The hull portion 1 is further provided with a suction pump (not shown) for sucking suspended matter and water in the collection tank 2 to the treatment device 5 through a suction pipe extending into the collection tank 2, and a treatment device 5 connected to an outlet end of the suction pump. The processing device 5 may be a dehydration/compression mechanism for dehydrating and compressing the extracted suspended matter, a mincing mechanism for mincing the extracted suspended matter and directly discharging the minced matter into a river, or a device for deactivating the suspended matter. Since the invention of the present application does not reside in the processing device 5, the processing device 5 will not be described in detail here.

For suspended matter thinly distributed on the water surface, the horizontal stability of the suction port of the water surface is important for efficiently absorbing the dense layer of the water surface. In the case where the recovery apparatus is mounted on the hull portion 1, the ship is rocked by the walking of workers on the ship, and the recovery apparatus such as the suction port is difficult to be kept horizontal due to the influence of wind, waves, and the like. According to the embodiment of the present invention, by disposing the recovery water tank with the suction port in the form of containing a large amount of water in the notch 17 of the hull portion 1 and submerging it in the water, the position of the suction port can be adapted to the change of the surrounding water surface and stabilized by the weight and the inertial force of the water in the recovery water tank.

[ Water quality and Water temperature measuring tank ]

As shown in fig. 2 and fig. 3A to 3D, the recovery vessel further includes a water quality and temperature measuring tank for detecting the density of suspended solids and the water temperature. The water temperature measuring tanks are installed at the front ends of the left and right baffles 24 of the recovery water tank 2, respectively, and are submerged in water when the recovery vessel performs recovery work, thereby detecting the concentration of suspended solids and the water temperature within a predetermined water depth range. Here, the predetermined water depth range is preferably set to a water depth range in which suspended matter is normally distributed, and the suction port of the collection tank can be raised and lowered.

In the present embodiment, one water quality and temperature measurement tank is provided on each of the front ends of the left and right baffle plates 24 of the collection water tank 2, but the number and the position of the water quality and temperature measurement tanks are not limited to this, and a plurality of water quality and temperature measurement tanks or one water quality and temperature measurement tank may be provided as necessary. For example, one plate may be provided at an intermediate position of the front end portion of the extension plate 23 of the collection water tank 2.

As an example of the water quality and water temperature measurement tank, a water quality and water temperature measurement tank 6 having a plurality of measurement chambers in the vertical direction, that is, the water depth direction may be used. As shown in fig. 3A to 3C, the water quality and water temperature measurement tank 6 includes a support frame 61, a plurality of measurement chambers 62, a level gauge 63, and a transmission unit (not shown).

The support frame 61 is attached to the side fence 24 so as to be able to ascend and descend by an elevator device or the like.

A plurality of measurement chambers 62 are arranged in the vertical direction on the support frame 61. The measurement chamber 62 is opened at the front and rear, and has a sensor 64 built therein. The sensor 64 includes at least: a water quality sensor for measuring the density of the suspended matters and a water temperature sensor for measuring the water temperature. The water quality and water temperature measuring tank 6 is installed in such a manner that the front opening of the measuring chamber 62 faces the bow and the rear opening faces the stern. When the recovery ship performs recovery work, water containing suspended matters flows through the inside of the measurement chambers 62, and the water quality sensor and the water temperature sensor in each measurement chamber 62 measure the concentration of suspended matters and the water temperature in the measurement chamber 62, respectively.

The suspended solid density data and the water temperature data measured in each measuring chamber 62 are transmitted to a control device (not shown) of the recovery vessel by wire or wireless via a transmission unit.

Here, the suspended matter to be recovered may be chlorophyll, oil, blue algae, red tide algae, or the like, and the water quality sensor may be any sensor or a combination of these sensors for detecting turbidity, chlorophyll concentration, oil concentration, density of blue algae, red tide algae, or the like, and an appropriate sensor may be selected and used depending on the main object to be recovered. The sensor for measuring turbidity may employ an optical turbidimeter, such as an integrating sphere turbidimeter. The sensors for measuring chlorophyll concentration, oil density, blue-green algae density and red-tide algae density may employ a multi-wavelength fluorometer or the like. For example, when cyanobacteria and phytoplankton are the main recovery targets, the chlorophyll concentration can be measured by a multi-wavelength fluorometer. When plural kinds of suspended matter are mainly collected at the same time, the measurement can be performed by using plural kinds of sensors, respectively, and the measurement results can be used in appropriate combination.

The water temperature sensor may be any temperature sensor that can measure the water temperature, such as a thermistor thermometer.

The water quality and temperature measurement tank 6 is also provided with a level gauge 63 for monitoring that the top surface of the measurement tank 6 is matched to the water surface. The liquid level gauge 63 may be an ultrasonic liquid level gauge. An ultrasonic level gauge is installed above the top surface of the top measurement chamber at a predetermined distance using an ultrasonic level gauge. The level gauge may also employ a conductivity sensor. The conductivity sensor outputs a signal when it is in contact with water, and does not output a signal when it is not in contact with water. For example, two conductivity sensors are used as the liquid level meter, one of which is disposed on the top surface of the topmost measurement chamber, and the other of which is disposed at a position above the conductivity sensor at a predetermined distance from the top surface of the measurement chamber. When the conductivity sensor on the top surface of the measuring chamber has a signal output and the conductivity sensor above it has no signal output, it can be confirmed that the top surface of the measuring chamber 6 is level with the water level and the measuring chamber 6 is at the proper water depth position.

The signal output from the level gauge 63 is also transmitted to the control device of the recovery ship via the transmission unit.

The control device receives the detection signal of the liquid level gauge 63 in real time, and controls the water quality and water temperature measuring tank 6 to be lifted and lowered to a predetermined water depth position based on the detection signal.

The water quality and temperature measuring tank 6 further includes vertical layer separating plates 65, and the vertical layer separating plates 65 are provided on the top and bottom surfaces of each measuring chamber and extend horizontally in front of and on the left and right sides of the front opening of the measuring chamber 62. Because the vertical layer separating plate 65 protrudes and extends outward more than the top surface and the bottom surface of the front opening of the measuring chamber, water at the front opening of the measuring chamber 62 can be separated in the vertical direction, and the up-and-down disturbance of water in front of the measuring chamber 62 is avoided, so that water in different layers stably enters the measuring chambers 62 of each layer, and the measuring accuracy of the measuring chambers of each layer is improved.

The blue algae and phytoplankton usually form a dense layer on the water surface in units of several mm to 1 cm. Therefore, the water temperature measuring tank 6 is preferably configured to collect water at intervals of 1cm to 2cm in the vertical direction. Specifically, for example, when the longitudinal direction of the hull portion 1 is the longitudinal direction, the lateral direction of the hull portion 1 is the width direction, and the vertical direction of the hull portion 1 is the height direction, the water quality and water temperature measurement tank 6 may be formed to have a length of 20cm, a width of 10cm, and a height of 20cm, for example, and may be formed so as to have a horizontal plate to partition 10 measurement chambers uniformly in the vertical direction. In this case, the water quality and temperature measuring tank 6 measures the density of suspended solids and the water temperature at each of 10 water depth layers which are uniformly distributed in the vertical direction within a range from the water surface to a predetermined water depth, for example, a water depth of 20 cm. In addition, a horizontal partition plate of 20cm square, i.e., a vertical layer separation plate, is provided up and down near the front opening of each measuring chamber, so that water in the vertical layer partitioned in units of 2cm in front of the measuring chamber can stably enter each measuring chamber.

As another example of the water quality and water temperature measurement tank, a water quality and water temperature measurement tank 6' shown in fig. 3D may be used. The water quality and temperature measurement tank 6' is different from the water quality and temperature measurement tank 6 shown in fig. 3A to 3C mainly in that a moving mechanism such as a vertical rail 66' is provided without partitioning the tank, and a sensor 64' such as a water quality sensor and a water temperature sensor moves up and down in the tank 62' along the moving mechanism such as the vertical rail 66' and measures and outputs the density of suspended solids and the water temperature at a plurality of predetermined water depth positions.

However, compared with the water quality and temperature measuring tank 6', the water quality and temperature measuring tank 6 shown in fig. 3A to 3C is divided into a plurality of measuring chambers in the vertical direction, and the sensors in the measuring chambers respectively detect the density of suspended matters and the water temperature in the measuring chambers of each layer, so that the influence of the vertical disturbance of water in the measuring tank on the measuring accuracy is avoided, the measuring accuracy is improved, and more accurate recovery control is facilitated.

[ control of recovery based on distribution of suspended solids and distribution of water temperature ]

In the present embodiment, the control device of the recovery ship controls the recovery operation based on the water area conditions such as the distribution of suspended matter in the water area to be recovered, the water temperature, and the like, and the traveling conditions such as the ship speed, and thereby improves the recovery efficiency.

For efficient recovery, it is preferable to control the suction flow rate of the suction port to be equal to the ship speed, and the suction flow rate of the suction port can be controlled by controlling the suction amount of the suction pump. The suction amount of the suction pump can be linearly controlled. The suction amount per unit time of the suction pump can be expressed by the following equation.

Qp＝V1×L23×H23

Where Qp is the suction amount per unit time of the suction pump, for example, per second, V1 is the ship speed, L23 is the suction port width, that is, the width of the leading edge of the extension plate 23 constituting the suction port bottom surface, and H23 is the water depth at which the leading edge of the extension plate 23 is located.

The ship speed may be obtained by, for example, recovering the existing GIS of the ship, a ship speed meter, or the like. The ship speed instrument can be a sonar or an electromagnetic ship speed instrument. For example, when a recovery ship performs a recovery operation in a river, the ship may move with the flow of water even when the ship is stopped, and the ship speed may be detected by an electromagnetic ship speed meter.

The control device determines the water depth position of the bottom surface of the suction port based on the concentration distribution and the water temperature distribution of the floating matter in the recovery water area, controls the elevation of the elevation device 16, and sets the extension plate 23 of the recovery water tank 2 to the determined water depth position.

Then, the control device calculates the suction amount of the suction pump by the above formula based on the ship speed and the width and depth of the bottom surface of the suction port, and controls the suction pump to the calculated suction amount.

In the present embodiment, the determination of the water depth position of the suction port bottom surface can be performed by the method shown in fig. 4. Next, the control of the suction port bottom surface water depth of the collection tank 2 based on the density of the suspended solids and the water temperature will be specifically described with reference to fig. 4. Fig. 4 is a flowchart showing a method for setting the water depth of the bottom surface of the suction port based on the density of the suspended solids and the water temperature.

In the present embodiment, the concentration of suspended solids in water and the water temperature are measured by the water quality and water temperature measuring tank 6 provided at the tip of the hull 1.

After the recovery operation of the recovery vessel is started, the control device receives the density data and the water temperature data of the suspended solids measured by the detection chambers of each layer of the water quality and water temperature measurement box 6 as the density and the water temperature of the suspended solids in the respective water depth layers in real time or periodically (step SX 1).

The control device calculates a difference between the maximum and minimum densities of the received suspended matter densities, and determines whether or not the difference between the maximum and minimum densities is greater than or equal to a density difference threshold (step SX 2). Here, the density difference threshold may be set as needed, and may be set to, for example, 20% of the maximum density.

If the density difference is smaller than the density difference threshold value (NO in step SX 2), it is judged that the suspended matter is distributed uniformly in the predetermined depth range, and the process proceeds to step SX3, where the depth set value d of the bottom surface of the suction port is determined as the bottommost depth of the predetermined depth range.

If the density difference is equal to or greater than the density difference threshold value (yes in step SX 2), it is determined that suspended matter is aggregated, and the process proceeds to step SX4.

In step SX4, the control device finds the water temperature difference between adjacent layers, and determines whether there is an adjacent layer whose water temperature difference is greater than or equal to the water temperature difference threshold in step SX 5. If there is an adjacent layer having a water temperature difference greater than or equal to the water temperature difference threshold value (yes judgment in step SX 5), it is considered that water temperature stratification has occurred in this adjacent layer, and the process proceeds to step SX6. Here, the water temperature difference threshold may be set according to the water area environment or the like, and may be set to 0.5 ℃.

In step SX6, the control unit determines the depth set value d of the bottom surface of the suction port as a depth from the boundary of the adjacent layers of the water temperature stratification downward by a predetermined number of layers. Here, if the depth from the boundary of the adjacent layers of the water jump layer to the predetermined number of layers exceeds the predetermined water depth range, that is, the bottommost layer depth greater than the predetermined water depth range, the depth set value d is determined as the bottommost layer depth (step SX7 and step SX 3). Here, the predetermined number of layers may be set according to the number of measurement layers of the water quality and water temperature measurement tank, that is, the measurement fineness, the water area environment, and the like, and may be set to 2 layers, 1 layer, or 0 layer, for example. Considering the turbulent flow at the suction port, it is preferably set to 2 layers, the same applies hereinafter.

If the determination in step SX5 is "no", the water temperature is considered to be equalized, and then, the distribution of the concentration density is analyzed, and the depth setting value is set based on the distribution of the concentration density.

In the present embodiment, specifically, the process proceeds to step SX8, where it is determined whether or not the layer having the highest density is the topmost layer. If "yes", it is considered that the density becomes higher upward and suspended matter is collected in a near-water range, and the process proceeds to step SX9.

In step SX9, the density difference of each adjacent layer is calculated, and the adjacent layer having the largest density difference is determined, and then in step SX10, the depth setting value d is determined as the depth of a predetermined number of layers downward from the boundary of the adjacent layer having the largest density difference. Here, if the depth of the predetermined number of layers downward from the boundary of the adjacent layer having the largest difference in density exceeds the predetermined water depth range, the depth setting value d is determined as the depth of the bottommost layer (step SX7 and step SX 3).

If no in step SX8, the process proceeds to step SX11, and it is determined whether or not the layer having the highest density is the lowermost layer. If judged as "yes", the depth set value d is determined as the bottommost layer depth considering that the density is higher as it goes downward (step SX 3).

If the determination in step SX11 is no, the concentration density is assumed to be in a mountain-like distribution with the maximum intermediate layer within the predetermined water depth range, and the process proceeds to step SX12, where the depth set value d is determined as the depth from the layer with the maximum concentration downward by the predetermined number of layers. Here, if the depth of the predetermined number of layers downward from the layer having the highest density exceeds the predetermined water depth range, the depth set value d is determined as the bottommost layer depth (step SX7 and step SX 3).

After the depth setting d of the bottom surface of the suction port is determined as described above, the control device adjusts the elevation of the collection water tank 2 by controlling the elevation of the elevation mechanism 16 so that the bottom surface 23 of the suction port is set to the depth of the depth setting d.

In the above, when the distribution of the density is analyzed, specifically, whether the density is distributed higher as it goes upward, higher as it goes downward, or distributed in a mountain shape in which the middle layer is the largest is determined depending on whether the layer having the highest density is the uppermost layer or the lowermost layer.

As described above, according to the present embodiment, when harmful microorganisms such as blue-green algae and phytoplankton, and suspended matters such as oil, which are objects to be collected, are dispersed over a wide range, the suction port is provided at the lower portion of the distribution range to perform the collection process. In addition, when the suspended matters are gathered near the water surface and not dispersed in a wide range, the suction port is provided in the suspended matter gathering layer to intensively suck the high density water. In this case, if the water temperature is stratified in the vertical direction, the suspended matter is concentrated on the upper part of the stratification of the water temperature, and the vertical disturbance is not easily generated, so that the suction port can be provided in the suspended matter accumulation layer to perform high-speed suction of the high-concentration water. In this way, by adjusting the position of the suction port based on the vertical distribution of the suspended solids and the water temperature and adjusting the suction amount of the suction port in accordance with the ship speed, the suspended solids can be efficiently collected.

Further, according to the embodiment of the present invention, by providing a device for automatically measuring the vertical distribution of suspended solids in water and the water temperature distribution, and automatically adjusting the position of the suction port and the suspended solids suction speed based on the measurement results, it is possible to achieve efficient collection which has not been achieved in the past.

[ Structure of guide plate ]

If the shape of the suction port for guiding the floating objects to enter is constant, the collected objects will be separated from the suction port due to uneven suction force when the recovery vessel turns. In addition, the suspended matter is often collected on the shore where the terrain is complicated by the wind and the blowing flow caused by the wind. Conventional fixed suction ports are difficult to achieve effective suction without fine adjustments to the course of the vessel itself.

In view of the above conventional problems, in the present embodiment, a deflector structure that is deformable in the horizontal direction is further provided on the recovery vessel. As shown in fig. 1 and 2, the deflector structure is installed in front of the suction port of the recovery vessel, and guides the floating matter in front to enter the suction port.

Next, the baffle structure will be explained with reference to fig. 5 (a) - (c). The guide plate structure comprises guide plates which are arranged in a left-right symmetrical mode. Fig. 5 (a) - (c) are schematic views illustrating the baffle structure by taking the baffle on the right side in the forward direction of the recovery vessel in the baffle structure as an example, wherein fig. 5 (a) sequentially illustrates a state where the baffle is completely contracted, partially extended, and completely extended from the top to the bottom, fig. 5 (b) is a cross-sectional view taken along line AA in fig. 5 (a), and fig. 5 (c) illustrates how the baffle changes its angle.

As shown, the baffle structure includes left and right symmetrically arranged baffles, each baffle including: a first baffle portion 71 rotatably arranged in a horizontal direction on one side of the suction port; a second baffle portion 72 telescopically coupled to the left and right first baffle portions 71; a rotation driving mechanism 74 drivingly connected to the first baffle portion 71, for driving the first baffle portion 71 to rotate in the horizontal direction; and a telescopic driving mechanism 75 drivingly connected to the second baffle portion 72 for driving the second baffle portion 72 to expand and contract relative to the first baffle portion 72.

Specifically, as shown in fig. 5 (a) - (c), the first baffle portion 71 has a long plate shape with an accommodating space formed therein, and the accommodating space can accommodate the second baffle portion 72. The cross section of the first baffle portion 71 is a shape in which one side thereof is partially opened. However, the first baffle portion 71 may be formed to have a fully closed cross section. The base end portion of the first baffle portion 71 is connected to a rotation drive mechanism 74, and the rotation drive mechanism 74 is attached to the tip end portion of the side guard 24. The rotation driving mechanism 74 drives the first baffle portion 71 to rotate in the horizontal direction about the base end portion thereof. Here, the rotary drive mechanism 74 may be a rotary motor.

The second baffle portion 72 is movably accommodated in the accommodating space of the first baffle portion 71, and is formed in a long plate shape.

The telescopic driving mechanism 75 is provided at the front end of the first baffle portion 71 and is drivingly connected to the second baffle portion 72. For example, the telescopic drive mechanism 75 may include a rotary motor and a rack and pinion drive structure. The gear is fixed to an output shaft of the rotary motor, the rack is installed on one side surface of the second baffle portion 72 along the length direction of the second baffle portion 72, and the gear is engaged with the rack. The second baffle portion 72 is thereby movable back and forth in the longitudinal direction thereof by the forward and reverse rotation of the rotary motor.

The baffle preferably further comprises a detachment prevention mechanism. The disengagement prevention mechanism may include: a convex strip 76 provided on one side surface of the base end portion of the second baffle portion 72; and a boss portion 77 protruding from at least one of the upper side wall and the lower side wall in the vicinity of the front end portion of the first baffle portion 71 toward the other. As shown in the lowermost view in fig. 5 (a), when the second baffle portion 72 is fully extended from the first baffle portion 71, that is, the base end portion thereof is moved to the front end portion of the first baffle portion 71, the convex strip 76 on the second baffle portion 72 abuts against the stopper 77 on the first baffle portion 71, thereby preventing the second baffle portion 72 from coming out of the first baffle portion 71.

The first baffle portion 71 and the second baffle portion 72 may be made of, for example, hard plastic, stainless steel, or the like, and may have a vertical width larger than the thickness of the aggregate layer in which suspended matter such as blue algae is generally aggregated, for example, about 30 cm. When the recovery operation is performed, at least a part of the first and second baffle portions is deep into the water, for example, to a depth of 10cm to 30cm under the water.

In addition, the left and right deflectors are subjected to strong water pressure during the propulsion of the recovery vessel. Therefore, as shown in fig. 1 and 2, the recovery vessel may preferably be provided with damper devices 14 for supporting the baffle from the rear surface of the baffle on both the left and right sides of the hull portion 1. The shock-absorbing means 14 includes, for example, a damper including a spring or the like and a stay connected thereto, and the damper is fixed to the floating body support 11 and the stay is connected to the back of the first baffle portion 71 so that the stay is extended forward or retracted backward as the first baffle portion 71 is rotated to change the angle. By providing the damper 14, the baffle plate is supported from the rear side to receive the water pressure from the front side and is prevented from shaking up and down.

A distance sensor 73 for detecting the distance to the front obstacle may be attached to the front end of the second baffle portion 72. The distance sensor 73 may be any sensor that can measure a distance, for example, a laser sensor, an acoustic wave sensor, or the like.

[ control of the guide plate Structure ]

According to the present embodiment, the control device performs the control of the normal operation mode on the baffle structure when the recovery vessel performs the normal recovery operation, and performs the control of the shore operation mode on the baffle structure when the recovery vessel performs the recovery operation on the shore. Whether the baffle structure performs the normal action mode or the ashore action mode may be specified by an operator in accordance with the recovery operation.

The operation mode and the control method of the guide plate structure will be specifically described below with reference to fig. 6 (a) - (f) to 8. Fig. 6 (a) to (f) are schematic diagrams showing a deformation form in various operation modes of the guide plate structure, and fig. 7 is a flowchart showing a control method of a normal operation mode of the guide plate structure; fig. 8 is a flowchart illustrating a control method of the ashore action pattern of the guide plate structure.

When the recovery operation is not performed, as shown in fig. 6 (a), the baffle structure is in the initial state: namely at: the left and right deflectors are completely retracted, that is, the second deflector portion is retracted into the first deflector portion, and the left and right deflectors are rotated inward (i.e., in a direction close to the suction port) with respect to the fore-and-aft direction of the hull 1 until their front ends are closed, thereby blocking the suction port. This reduces the risk of the baffle being damaged by impact, and prevents entry of undesirable floating objects. In this case, the closed front ends of the left and right baffle plates preferably protrude slightly forward, whereby the strength can be improved.

After the recovery job is started, if the normal operation mode is designated, the control device executes the control method shown in fig. 7. The control device acquires the running information of the recovery ship such as the ship speed and the steering information in real time or periodically (step ST 1), judges the running state of the recovery ship based on the running information, and controls the deformation of the deflector structure according to the running state, wherein the steering information at least includes information indicating whether the recovery ship is steered left or right. The steering information can be obtained by, for example, recovering the existing GPS of the ship, a magnetic compass for the ship, or the like.

After acquiring the ship speed, the steering information, and the like, the control device determines whether the traveling state is the steering based on the steering information in step ST2, and if it is determined that the vehicle is traveling straight instead of the steering ("no"), the control device proceeds to step ST3 to determine whether the ship speed is high. If it is determined that the traveling state is at a high speed (yes), the process proceeds to step ST4, where the control device controls the left and right deflectors to fully contract and rotate outward (i.e., in a direction away from the suction port) in the horizontal direction with respect to the front-rear direction (indicated by a broken line in fig. 6 b) by a predetermined first angle, that is: in each of the left and right deflectors, the second deflector portion 72 is retracted completely inside the second deflector portion 71, and the first deflector portion 71 and the second deflector portion 72 are rotated outward by a prescribed first angle. As a result, the baffle structure deforms like the shape shown in fig. 6 (b), and the collection vessel sucks a relatively narrow water area in a concentrated manner when traveling straight at high speed. Here, the first angle may be, for example, any angle in the range of 5 ° to 30 °.

If it is determined in step ST3 that the ship is not at the high speed ("no"), the process proceeds to step ST5, where it is determined whether the ship speed is at the bottom speed. If the speed is determined to be low (yes), the process proceeds to step ST6, and the control device controls the left and right deflectors to be fully extended and to be rotated outward by a predetermined second angle with respect to the front-rear direction, that is: in each of the left and right deflectors, the second deflector portion 72 is fully extended from the second deflector portion 71, and the first deflector portion 71 and the second deflector portion 72 are rotated to the outside by a prescribed second angle. As a result, the baffle structure deforms like the shape shown in fig. 6 (c), and a wider water area is sucked without causing spreading when the recovery ship travels straight at a low speed. Here, the second angle is larger than the first angle, and may be any angle in the range of 60 ° to 70 °, for example.

If it is determined in step ST5 that the speed is not the low speed ("no"), the ship speed is a middle speed that is greater than the low speed and less than the high speed, the process proceeds to step ST7, and the control device controls the left and right deflectors to be fully extended and to be rotated outward in the horizontal direction by a predetermined third angle with respect to the front-rear direction. At this time, the baffle structure is deformed like the shape shown in fig. 6 (d), but the left and right baffles are opened at different angles by rotation. Here, the third angle is larger than the first angle and smaller than the second angle, and may be any angle within 30 ° to 60 °, for example.

If the steering is determined in step ST2 (yes), the process proceeds to step ST8, where it is determined whether the ship speed is high. If the driving state is determined to be high (yes), the process proceeds to step ST9, where the control device controls the turning-side spoiler to be fully retracted and rotated outward by a predetermined first angle with respect to the front-rear direction, and controls the non-turning-side spoiler to be fully extended and rotated inward by an angle that is a predetermined multiple of the rotation angle of the turning-side spoiler with respect to the front-rear direction. The turning-side guide plate and the non-turning-side guide plate are respectively a guide plate positioned on the turning direction side and a guide plate positioned on the opposite side of the turning direction in the left and right guide plates. The predetermined multiple is smaller than 1, and may be set to 1/2, for example, as follows.

If it is determined in step ST8 that the speed is not the high speed ("no"), the process proceeds to step ST10, and it is determined whether the ship speed is the bottom speed. If the speed is determined to be low (yes), the process proceeds to step ST11, where the control device controls the turning-side spoiler to be fully retracted and rotated outward by a predetermined second angle with respect to the front-rear direction, and controls the non-turning-side spoiler to be fully extended and rotated inward by an angle that is a predetermined multiple of the rotation angle of the turning-side spoiler with respect to the front-rear direction.

If it is determined in step ST10 that the speed of the ship is not low (no), the ship speed is a middle speed that is greater than the low speed and less than the high speed, the process proceeds to step ST12, and the control device controls the turning-side spoiler to be fully contracted and to be rotated outward by a predetermined third angle with respect to the front-rear direction, and controls the non-turning-side spoiler to be fully extended and to be rotated inward by an angle that is a predetermined multiple of the rotation angle of the turning-side spoiler with respect to the front-rear direction.

Thus, the deflector structure deforms like the shape shown in fig. 6 (d) in the left turn, and deforms like the shape shown in fig. 6 (e) in the right turn. Therefore, when the recovery ship turns, the recovered objects can be prevented from being separated from the suction port due to uneven suction force.

As described above, in the present embodiment, the configuration of the baffle plate is deformed in accordance with the traveling speed and traveling direction of the recovery vessel, and the shape of the suction port at the leading end, into which the floating objects are guided, is changed, whereby the suction force distribution of the suction port can be adjusted to the optimum distribution, and the recovered objects can be prevented from being detached from the suction port.

On the other hand, when the recovery vessel performs the recovery operation along the shore, the recovery vessel normally moves forward stably at a constant speed. In this case, the opening angle of the baffle structure, that is, the rotation angle of the left and right baffle portions is also kept almost constant. In this case, the baffle structure can be controlled based on the control method of the coastal operation mode shown in fig. 8. Next, the control method of fig. 8 will be explained.

In step SY1, the control device acquires in real time the offshore distance data measured by the distance sensor 73 provided at the front end of the shore-side second deflector 72. Here, the shoreside-side second baffle 72 refers to the baffle closer to the shore side out of the left and right baffles. The data of the distance to the shore is the distance from the distance sensor 73 to the shore.

Next, in step SY2, the stretch amount Δ d, which is a value obtained by subtracting the standard offshore distance from the offshore distance, is determined. Here, the standard offshore distance may be set to an appropriate distance in consideration of the bank condition, the operating condition of the ship, and the like. For example, 10cm may be set.

Next, in step SY3, the amount Δ d of expansion and contraction determined in step SY2 is compared with 0. If the amount of expansion Δ d is smaller than 0, the control device proceeds to step SY4, where the control device controls the shoreside-side baffle plate so that the shoreside-side second baffle plate portion 72 is retracted toward the shoreside-side first baffle plate portion 71 by a distance equal to the amount of expansion Δ d.

If the amount of expansion Δ d is larger than 0, the control device proceeds to step SY5, and controls the bank-side baffle plate so that the bank-side second baffle plate portion 72 extends from the bank-side first baffle plate portion 71 by a distance equal to the amount of expansion Δ d.

If the expansion amount deltad is 0, the current offshore distance is considered to be proper, and the shape of the guide plate structure is kept unchanged.

As described above, in the present embodiment, when the recovery operation is performed along the bank, the control of keeping the distance from the bank constant is performed on the guide plate on the bank side as shown in fig. 6 (f), whereby the diversion and the suction can be performed efficiently in conformity with the shape of the bank, and the corner fall of the bank can be recovered. Thereby, the floating matters can be efficiently recovered from the river bank with more densely-packed floating matters.

As described above, in the deformation control of the baffle structure, the control device controls the rotation of the first baffle portion 71 by controlling the rotation driving mechanism 74 based on the control command to rotate the first baffle portion 72, and controls the expansion and contraction of the second baffle portion 72 by controlling the rotation driving mechanism 75 based on the control command to expand and contract the second baffle portion 72.

The embodiments of the present invention have been described above, but it is apparent that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the technical concept of the present invention, and it goes without saying that the embodiments obtained by the changes and modifications fall within the scope of protection of the present invention.

Claims (14)

1. A suspended solid recovery device which travels on a water surface and recovers suspended solids floating on the water surface, comprising:

a recovery water tank for recovering the suspended solids, which is installed in a device main body so as to be able to ascend and descend, and which includes a recovery chamber and a suction passage that is disposed in front of the recovery chamber in the front-rear direction of the device main body and is connected to the recovery chamber, and through which water containing the suspended solids is sucked into the recovery chamber;

a suction pump connected to the collection water tank via a suction pipe, for sucking and collecting the water containing the suspended solids in the collection water tank;

and a control device that controls a suction amount of the suction pump so that a suction flow rate at the suction port, which is a front port of the suction passage, matches the traveling speed, based on the traveling speed of the suspended solid collection device, a width of a bottom surface of the suction port, and a water depth position.

2. The suspended solid recovery apparatus according to claim 1,

further comprises a water quality and water temperature measuring tank which is arranged in front of the suction port in the front-back direction and measures the water temperatures of a plurality of deep water layers and the densities of floating matters within the water depth range from the water surface to the preset depth,

the control device determines a depth setting value of the bottom surface of the suction port based on the water temperature of the plurality of deep water layers and the density of the suspended matter measured by the water quality and water temperature measurement tank, and controls the elevation of the recovery water tank to set the bottom surface of the suction port to the depth setting value.

3. The suspended solids recovery apparatus according to claim 2, wherein the control device

Determining whether the suspended solids are uniformly distributed in the vertical direction based on the density of the suspended solids in the plurality of deep water layers, determining whether water temperature stratification has occurred based on the water temperatures in the plurality of deep water layers, and determining whether water temperature stratification has occurred

If the floating objects are judged to be uniformly distributed, setting the bottommost depth in the water depth range as the depth set value,

if the floating matter is determined to be unevenly distributed and the water temperature stratification is caused, the shallower depth of the predetermined number of layers downward from the position where the water temperature stratification is caused and the depth of the bottommost layer is set as the depth set value,

and if the suspended matter is judged to be unevenly distributed and the water temperature stratification is not generated, analyzing the distribution of the concentration density and setting the depth set value based on the distribution of the concentration density.

4. The suspended matter collecting apparatus according to claim 3, wherein in said analyzing the distribution of the concentration density and setting the depth setting value based on the distribution of the concentration density,

determining the adjacent layer having the largest difference in the density if the density is higher upward, and setting a depth shallower from a boundary of the adjacent layer having the largest difference in the density downward by the predetermined number of layers and the bottommost layer depth as the depth setting value,

setting the bottommost layer depth to the depth set value if the density is higher downwards,

and if the concentration density is in the mountain-shaped distribution with the maximum middle layer in the water depth range, setting the shallower depth of the depth from the middle layer to the preset layer number and the bottommost layer depth as the depth set value.

5. The suspended solid recovery apparatus according to claim 3 or 4,

the control device compares the difference between the maximum and minimum concentration densities among the concentration densities of the plurality of deep water layers with a concentration difference threshold, and determines that the suspended matters are not uniformly distributed in the vertical direction if the difference between the maximum and minimum concentration densities is greater than or equal to the concentration difference threshold.

6. The suspended solid recovery apparatus according to claim 3 or 4,

and the control device calculates the water temperature difference between every two adjacent layers, judges whether the adjacent layer with the water temperature difference larger than or equal to the water temperature difference threshold exists or not, and judges that water temperature stratification occurs at the boundary of the adjacent layer with the water temperature difference larger than or equal to the water temperature difference threshold if the adjacent layer with the water temperature difference larger than or equal to the water temperature difference threshold exists.

7. The suspended solids collecting apparatus according to claim 1,

the device main body is formed with a notch at a front end side, and the recovery water tank is arranged in the notch.

8. The suspended matter recovery device according to claim 2, wherein the water quality and water temperature measuring tank includes:

a support frame which is installed at the front end of the suction passage of the recovery water tank in a liftable manner; and

a plurality of measurement chambers arranged on the support frame in the up-down direction, each of the measurement chambers having a front-rear opening and containing: a water temperature sensor for measuring a water temperature; and a water quality sensor for measuring the density of the suspended matters,

the water quality and water temperature measuring box outputs the water temperature and the density of the suspended matters measured by the water temperature sensor and the water quality sensor in each measuring chamber as the water temperature of each water deep layer and the density of the suspended matters.

9. The suspended matter recovery device according to claim 8, wherein the water quality and water temperature measuring tank further comprises:

vertical layer separating plates provided on the top and bottom surfaces of each measuring chamber and extending horizontally at least in front of and on the left and right sides of the front opening of the measuring chamber.

10. The suspended solid recovery apparatus according to claim 1, further comprising baffle structures installed on both left and right sides of the suction port for guiding the entry of the suspended solids in front of the suction port to the suction port, and including left and right baffles, each of the baffles including:

a first baffle portion rotatably arranged in a horizontal direction on one side of the suction port;

the second flow guide plate part is telescopically connected to the first flow guide plate part;

the rotation driving mechanism is in driving connection with the first flow guide plate part and drives the first flow guide plate part to rotate in the horizontal direction; and

and the telescopic driving mechanism is in driving connection with the second guide plate part and drives the second guide plate part to stretch relative to the first guide plate part.

11. The suspended solids collecting apparatus according to claim 10, wherein the control device performs normal collecting operation

Acquiring the driving speed and steering information of the floating object recovery device, determining the driving state of the floating object recovery device based on the driving speed and the steering information, and

if the running state is determined to be high-speed straight running, the left and right guide plates are controlled to be completely contracted and rotate outwards relative to the front and back direction by a first angle,

if the running state is judged to be low-speed straight running, the left and right guide plates are controlled to be fully extended and rotate to the outer side by a second angle, wherein the second angle is larger than the first angle,

if the running state is judged to be a medium-speed straight running state, the left and right guide plates are controlled to be fully extended and rotate to the outer side by a third angle, wherein the medium speed is greater than the low speed and less than the high speed, the third angle is greater than the first angle and less than the second angle,

if the running state is judged to be high-speed steering, controlling a steering side guide plate to be completely contracted and rotate to the outer side by the first angle, and simultaneously controlling a non-steering side guide plate to be completely extended and rotate to the inner side by an angle which is a preset multiple of the first angle relative to the front-back direction, wherein the steering side guide plate and the non-steering side guide plate are respectively the guide plate positioned on the steering direction side and the guide plate positioned on the opposite side of the steering direction in the left and right guide plates,

if the running state is judged to be low-speed steering, the steering side guide plate is controlled to be completely contracted and rotated to the outer side by the second angle, and the non-steering side guide plate is controlled to be completely extended and rotated to the inner side by the angle of the preset multiple of the second angle,

and if the running state is judged to be the medium-speed steering state, controlling the steering side guide plate to be completely contracted and rotate towards the outer side by the third angle, and simultaneously controlling the non-steering side guide plate to be completely extended and rotate towards the inner side by the angle of the preset multiple of the third angle.

12. The suspended solid recovery apparatus according to claim 10 or 11,

the guide plate structure also comprises distance sensors which are respectively arranged at the front ends of the second guide plate parts of the left and right guide plates and are used for detecting the distance between the guide plates and the front obstacle,

when recovery work is performed along the shore, the control device acquires the offshore distance measured by the distance sensor on the shore-side guide plate, and controls the expansion and contraction of the second guide plate portion of the shore-side guide plate based on the deviation of the offshore distance from a predetermined standard offshore distance, wherein the shore-side guide plate is the guide plate closer to the shore among the left and right guide plates.

13. The suspended solid recovery apparatus according to claim 10 or 11,

when the recovery operation is not carried out, the guide plate structure is in an initial state, namely: the left and right guide plates are completely contracted, and the front ends are closed to block the suction port.

14. The suspended solids recovery apparatus according to claim 13,

in the initial state, the front ends of the left and right air deflectors project forward.

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