JP7394452B2 - Algae removal equipment and algae treatment system - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act (1) Publication by conducting a test Test date: July 1, 2020 to November 30, 2020 Test location: Senba Lake (3080 Chinaba-cho, Mito City, Ibaraki Prefecture)

The present invention relates to an algae removal device and an algae treatment system, and in particular to an algae removal device equipped with an algae collection means for collecting algae generated in a closed water area such as a lake or pond, and after collecting algae collected by the algae collection means. , concerning algae treatment systems up to final treatment.

In recent years, due to industrial development and population growth, the concentration of nutrients such as phosphorus and nitrogen in water in closed water bodies such as lakes and ponds has increased, and closed water bodies are likely to become eutrophic. As a result, large amounts of algae, which are phytoplankton, called blue-green algae or red tide occur, often turning the water cloudy green or red.

If nutrients can be quickly removed from eutrophic water, it is possible to purify the water with aquatic plants and a moderate amount of phytoplankton. However, it is difficult to quickly remove nutrients dissolved in water, and algae such as blue-green algae and red tide tend to grow in large quantities.

If large amounts of algae such as blue-green algae and red tide are left untreated, the oxygen concentration in the water area will drop, causing fish to die and causing damage such as strange odors to the water's edge and tap water sourced from the water area. For this reason, it is necessary to eliminate these algae in the water while simultaneously improving the causes of eutrophication in closed water bodies.

For example, blue-green algae, which is a typical example of algae, is a relatively spherical blue-green algae (mainly composed of Microcystis of several microns), which floats in the surface water several centimeters below the water surface due to intracellular gas vesicles. are doing. When a large amount of blue-green algae occurs, colonies of blue-green algae with a three-dimensional structure on the scale of tens to hundreds of micrometers form a mat and cover the water surface. A colony of blue-green algae is an aggregation of hundreds or more cells with a certain regularity. Examples of methods for treating such colonies of blue-green algae include Patent Document 1 and Patent Document 2.

In Patent Document 1, water containing colonies of blue-green algae sucked in by a water intake pump is passed through an ultrasonic irradiator to destroy the blue-green algae to increase the specific gravity of the blue-green algae, and then subjected to a centrifugal concentrator and a centrifugal dehydrator to dehydrate the water. A method has been proposed to efficiently collect blue-green algae from closed bodies of water by turning it into a solid substance (ultrasonic method).

Furthermore, in Patent Document 2, water containing colonies of algal blooms sucked in by a water intake pump is injected from both ends of a cylindrical body in opposite directions, and the water collides within the cylinder, thereby breaking up the colonies of algal blooms into small pieces. Proposed (opposite injection method). Further, Patent Document 2 proposes that after destroying the gas vesicles of algae to make it easier to settle, the algae can be returned to its original closed water area. If the colony structure of blue-green algae is divided into small pieces, and the gas vesicles are destroyed to make it easier to settle and returned to the closed water area, predation by zooplankton existing in the closed water body will be promoted, and the proliferation of algae in the closed water area will be promoted. Can be suppressed.

As described above, various proposals have been made regarding the treatment of algal blooms after they have been collected from closed water bodies. However, technology regarding how to efficiently collect and recover algal blooms that occur in closed water bodies is not sufficient.

For example, Patent Document 3 discloses a water quality conservation device equipped with an impact algaecide device that destroys algae by impact, and discloses an example in which the device is installed in a water area of a river to be conserved. This water quality maintenance device is equipped with a guide means for guiding algae contained in surface water to the impact algaecide device of the water quality maintenance device.

This guiding means is oriented in an inverted V-shape to the upstream fence that blocks the flow of surface water to the upstream side of the river, the downstream fence that blocks the flow of surface water to the downstream side, and the upstream fence. , consists of a diversion fence that guides surface water to the water intake of the water quality maintenance device when the wind blows from the upstream side to the downstream side, and a channel that guides surface water from the diversion fence to the impact algaecide device. .

As a result, the surface water is washed away by the wind blowing from the downstream side of the river to the upstream side, algae in the surface water gathers near the upstream fence, and then the surface water is washed away by the wind blowing from the upstream side to the downstream side. is washed away, and most of the algae collected near the upstream fence are taken into the water intake via the diversion fence. That is, the guiding means of Patent Document 3 is configured so that the effect of collecting algae is enhanced when surface water is blown away by wind in one direction from the upstream side to the downstream side.

Japanese Patent Application Publication No. 8-33888 Japanese Patent Application Publication No. 2006-238703 Japanese Patent Application Publication No. 2002-079293

However, the guiding means for collecting algae in Patent Document 3 may be effective for rivers, but in closed water areas such as lakes and ponds, the direction in which surface water flows changes depending on the direction in which the wind blows. However, it cannot be said to be effective if the flow of algae floating in the surface water changes accordingly.

That is, the guiding means of the conventional water quality maintenance device can only handle the flow of surface water in one direction (the flow from the upstream side to the downstream side as described above). As a result, if the direction in which the surface water flows changes depending on the direction in which the wind blows, such as in closed water bodies such as lakes and ponds, and the flow of algae floating in the surface water also changes accordingly, It is necessary to change the direction of the guiding means each time depending on the direction. Alternatively, it is necessary to place multiple water quality maintenance devices in advance in the direction in which the wind blows. Therefore, the collection and recovery efficiency of algae in a closed water area is poor, and when multiple units are installed, the equipment cost increases.

The present invention was made in view of these circumstances, and provides an algae removal device equipped with an algae collection means that can efficiently collect algae that has grown in closed water areas such as lakes and ponds, regardless of the direction of the wind. Another object of the present invention is to provide an algae treatment system from collecting algae collected by an algae collection means to final treatment of the algae.

In order to achieve the purpose of the algae removal device of the present invention, the algae removal device is equipped with an algae collection means for collecting algae floating in the surface water of a closed water body such as a swamp or pond. A plurality of first rod-shaped members capable of floating in surface water are arranged radially to form an inverted V-shaped collection channel in which the inlet into which floating algae flows is larger in diameter than the outlet. A plurality of algae collection sections formed and a plurality of second rod-shaped members capable of floating in the surface water of a closed water area are arranged consecutively and parallel to the outlet of the plurality of collection channels, and A plurality of first rod-shaped members and a plurality of second rod-shaped members are connected and fixed to an algae guiding section that forms a plurality of guiding waterways that guide the collected algae to one of the plurality of collection waterways. The device is characterized in that it includes at least a connecting and fixing member.

According to the algae removal device of the present invention, by radially arranging the plurality of first rod-shaped members that can float in the surface water of a closed water area, an inverted V-shaped structure is formed for floating algae to flow into the algae removal device. Multiple collection channels were formed in all directions, north, south, east and west. In addition, a plurality of second rod-shaped members capable of floating in the surface water of a closed water area are arranged consecutively and parallel to the outlet of the plurality of collection channels, so that a plurality of algae collected in the plurality of collection channels can be collected. A plurality of guiding channels are formed to guide the vehicle to one of the collecting channels. Then, the algae collection means was integrally constructed by connecting and fixing the plurality of first rod-like members and the plurality of second rod-like members using the connecting and fixing member.

As a result, even if the direction of flow of surface water changes depending on the direction of wind blowing, such as in closed water bodies such as lakes and ponds, and the direction of flow of algae changes accordingly, most of the algae It may flow into any collection channel(s).

As an aspect of the algae removal device of the present invention, it is preferable that one collection waterway is provided with an algae collection means for collecting algae collected in a plurality of collection waterways. As a result, we constructed an algae removal device that can both collect and recover algae at the same time.

As a result, algae that has flowed into any one of the plurality of collection waterways is guided to the algae collection means through the guide waterway and collected by the algae collection means.

Therefore, not only can algae generated in closed water bodies such as lakes and ponds be efficiently collected and recovered regardless of the wind direction, but there is no need to provide algae recovery means for each of multiple collection channels. The cost of the algae removal device can also be kept low.

As an aspect of the algae removal device of the present invention, it is preferable that the plurality of collection channels are four channels, and the four first rod-shaped members are arranged radially at 90° intervals. Radial collection channels are also possible with three channels, but in the case of three channels, the inverted V-shaped angle of one collection channel is 120°. As a result, depending on the direction of the wind, there is a risk that algae that have flowed into the collection waterway may flow out of the collection waterway again.

Furthermore, when the number of collection channels increases to five or more, it is necessary to increase the number of guide channels by that much, and the width of each guide channel becomes narrower. As a result, the flow of surface water in the introduction waterway tends to stagnate, so there is a risk that the collection efficiency of collecting algae collected in the collection waterway by the algae collection means will be reduced.

As an aspect of the algae removal device of the present invention, it is preferable that the first rod-shaped member and the second rod-shaped member are PVC pipes whose both ends are watertight. PVC pipes are lightweight, impact resistant, corrosion resistant, durable, and workable, and are inexpensive. PVC pipes are watertight at both ends and have air trapped inside, allowing them to form waterways in surface water. Can float to a certain extent.

In a preferred embodiment of the algae removal device of the present invention, the first rod-shaped member of the collection waterway is preferably expandable and retractable by a nested structure. Since the size and shape of closed water bodies are not uniform, by making the first rod-shaped member a nested structure, it is possible to not only change the size of the collection channel depending on the size of the closed water area, but also to install an algae removal device. By changing the lengths of the plurality of first rod-shaped members depending on the shape of the closed water area, it is possible to cope with a closed water area with a complicated shape.

In an aspect of the algae removal device of the present invention, the algae collecting means includes a sheet-like member suspended from a first rod-like member and having a width substantially equal to that of the first rod-like member, and a sheet-like member suspended in surface water. It is preferable to further include a weight member.

Thereby, it is possible to reliably prevent algae that have flowed into the collection waterway from passing through the first rod-shaped member and returning to the closed water area.

As an aspect of the algae removal device of the present invention, the algae collecting means further includes a reverse V-shaped angle variation prevention means for preventing fluctuations in the reverse V-shaped angle of the plurality of collection channels, The prevention means includes pin members erected at respective inlet positions of the plurality of first rod-like members forming the collection waterway, and a string-like member that connects adjacent pin members in a tensioned state. , is preferably configured.

Thereby, it is possible to prevent the inverted V-shaped angle of the collection waterway from becoming wider than the setting, and it is also possible to prevent damage to the collection waterway. That is, when the length of the first rod-shaped member constituting the collection waterway is long, the first rod-shaped member is curved by the flow of surface water flowing in the direction in which the wind blows, and the inverted V-shaped angle becomes wider than the setting. There may be cases where it is stored away. As explained in the case of the three canals mentioned above, if the inverted V-shaped angle becomes wider than the setting, depending on the direction of the wind, there is a risk that the algae that have flowed into the collection canal will flow out of the collection canal again. Furthermore, if the inverted V-shaped angle expands too much, the first rod-shaped member may break or otherwise be damaged.

As an aspect of the algae removal device of the present invention, it is preferable that the plurality of guide channels are provided with a water flow generating means for generating a water flow in the surface water of the guide channels from the collection channel toward the algae collection means.

The algae that flowed into the collection channel along with the flow of surface water pass through the guide channel and are collected by the algae collection means. In this case, the flow of surface water changes from an inverted V-shaped collection channel to a narrow guide channel, so there is a concern that surface water may accumulate in the guide channel. This problem can be solved by widening the guide channel, but the width of the channel is limited by the width of the suction nozzle that sucks the algae together with surface water in the algae collecting means.

Since the guiding channel of the present invention is equipped with a water flow generating means for generating a water flow in the surface water of the guiding channel from the collection channel toward the algae collection means, it is possible to prevent surface water from stagnation in the guiding channel. . This allows algae in closed water areas to be collected and recovered more efficiently.

As an aspect of the algae removal device of the present invention, the algae collecting means may be equipped with a mechanism for selectively collecting the algae by separating garbage from the closed water area collected together with the algae by the algae collecting means. preferable.

In an embodiment of the algae removal device of the present invention, the algae collecting means includes a gate-shaped device frame through which surface water containing collected algae can flow, and a device frame arranged horizontally in a direction perpendicular to the flow direction of the surface water. one end of a suction piping that is arranged to form a dust separation filter on its circumferential surface, and one end of a suction piping that suctions and takes in floating algae together with surface water on the side surface, and one end of a discharge piping that discharges water that washes the filter. A cylindrical dust separation drum with an opening for introducing the dust into the inside, and a total of six support rollers that are supported rotatably on the device frame at three points each on the circumferential surface of both ends of the dust separation drum. a rotary power means for rotating the dust separation drum by applying rotational power to at least one of the six support rollers; and a rotational power means fixed to the apparatus frame so that the lower part of the dust separation drum is immersed in surface water. a suction member installed in the dust separation drum, supported in communication with the suction piping, and formed such that a slot-shaped suction port that is long in the axial direction of the dust separation drum is located in the surface water. A nozzle and a discharge outlet provided in the dust separation drum, supported in communication with the discharge piping, and having a slot-shaped discharge port that is long in the axial direction of the dust separation drum and positioned above the water surface of the surface water. It is preferable to include a nozzle and a plurality of plate-shaped schemas that are provided in a protruding state on the outer surface of the dust separation drum and are long in the axial direction of the dust separation drum.

Here, "surface water can flow" means that surface water flows without stagnation.

According to the algae collecting means of the present invention, floating algae can be collected in closed water bodies such as lakes, ponds, rivers, closed sea areas, etc. where floating algae such as blue-green algae have grown in large quantities, so that the lower part of the garbage separation drum is immersed in the surface water. Float the collection device. As a result, the suction port of the suction nozzle provided in the dust separation drum is immersed in the surface water.

Then, while rotating the dust separation drum, a suction force is applied to the suction pipe. As the garbage separation drum rotates, the multiple schemas protruding from the outer surface of the garbage separation drum scrape up floating algae floating around the floating algae collection device, and the garbage separation drum is removed from the front gate side of the gate-shaped device frame. Forms a flow of surface water that passes through the lower part of the gate and flows toward the rear gate.

Due to the flow of the surface water, the floating algae scraped up by the schema pass through the filter of the dust separation drum together with the surface water and are taken into the suction pipe from the suction port. On the other hand, the garbage scraped together with the floating algae in the schema is separated by the filter in the garbage separation drum, and returned to the closed water area from the rear of the device frame along with the flow of surface water.

Furthermore, since the filter is automatically cleaned by discharging water from the discharge nozzle onto the inner surface of the filter of the dust separation drum, the filter is less likely to become clogged. Furthermore, the device frame is shaped like a gate, and the dust separation drum is supported at three points on both end circumferential surfaces by six support rollers rotatably supported by the device frame in a cantilevered manner. Therefore, the flow of surface water flowing from the front gate side of the gate-shaped device frame to the rear gate side after passing through the lower part of the garbage separation drum is not obstructed by the device frame or support rollers, so floating algae can be collected near the garbage separation drum. There is no stagnation.

Thereby, it is possible to selectively collect only floating algae such as blue-green algae, and it is possible to provide an algae collection means that requires almost no maintenance.

In order to achieve the object, the algae treatment system of the present invention includes the algae removal device according to claim 2, and a multi-stage method for destroying the algae collected by the algae collection means of the algae removal device and then collected by the algae collection means. The present invention is characterized by comprising an algae destruction means having a spiral pump structure.

According to the algae treatment system of the present invention, algae generated in closed water bodies such as lakes and ponds can be efficiently collected by the algae collection means regardless of the wind direction, and garbage collected together with the algae can be collected as algae. It is possible to construct a series of algae treatment systems that include separating the algae with a means to selectively collect only the algae, and finally processing the collected algae with an algae destruction means.

According to the algae removal device of the present invention, algae generated in closed water bodies such as lakes and ponds can be efficiently collected by the algae collecting means regardless of the direction of the wind. Furthermore, in the algae removal device, by arranging an algae collection means for collecting algae collected in a plurality of collection waterways in one collection waterway, both collection and recovery of algae can be performed efficiently at once. It is possible to construct an algae removal device that can remove algae.

Further, since the algae treatment system of the present invention includes the algae removal device of the present invention, it is possible to construct a series of algae treatment systems up to the final treatment of collected and recovered algae.

Overall configuration diagram of the algae treatment system of the present invention Overhead view of algae removal equipment Explanatory diagram mainly explaining the algae collection means of the algae removal device Explanatory diagram when there are three collection channels for algae collection means Explanatory diagram when there are 7 collection channels for algae collection means An explanatory diagram of an embodiment in which the first rod-shaped member of the collection waterway is made expandable and retractable. An explanatory diagram of an embodiment in which the first rod-shaped member of the collection waterway is provided with a sheet member hanging down into surface water and an inverted V-shaped angle variation prevention means. An explanatory diagram of the water flow generation means installed in the introduction channel of the algae collection means Enlarged diagram explaining water flow generation means Perspective view of algae collection means of algae removal device Perspective view of the area around the punched metal type garbage separation drum of algae collection means Perspective view of the area around the wire-mesh type garbage separation drum of the algae collection means Perspective view of the suction nozzle of the algae collection means Perspective view of the discharge nozzle of the algae collection means Explanatory diagram of an algae destruction device with a multi-stage centrifugal pump structure Explanatory diagram mainly explaining the action of the algae collection means of the algae treatment system Illustration of a conventional device for collecting blue-green algae Explanatory diagram of a floating algae treatment system equipped with deaeration means A perspective view of an integrated algae collection means and an algae destruction device in the algae treatment system of the present invention.

Preferred embodiments of the algae removal device and algae treatment system of the present invention will be described below with reference to the accompanying drawings.

The invention is illustrated by the following preferred embodiments. Modifications may be made in many ways and other embodiments may be utilized without departing from the scope of the invention. Accordingly, all modifications within the scope of the invention are included in the claims.

Here, parts indicated by the same symbols in the figures are similar elements having similar functions. In addition, in this specification, when a numerical range is expressed using " to ", the upper and lower limit values indicated by " to " are also included in the numerical range.

[Algae treatment system]
FIG. 1 is an overall configuration diagram of an embodiment of an algae treatment system 10 of the present invention, which is mainly composed of an algae removal device 12 and an algae destruction device 14 that destroys algae collected and recovered by the algae removal device 12. be done. Further, as an example of algae floating in a closed water area, an example of blue-green algae will be explained below.

As an explanation of the algae treatment system 10, the apparatus will be explained in order along the process flow from collecting algal blooms in the closed water area 15, collecting them from the closed water area 15, and finally destroying the algal blooms.

(Algae removal device)
The algae removal device 12 mainly includes an algae collection means 12A that collects algae floating in the surface water of the closed water area 15, and an algae collection means 12B that collects the collected algae from the closed water area 15. Although the algae removal device 12 of the present embodiment will be described as an example including both the algae collection means 12A and the algae collection means 12B, the algae removal device of the present invention can also be used in a case where only the algae collection means 12A is configured. Included in 12.

<Algae collection means>
FIG. 2 is an overhead view of the algae collection means 12A installed in the closed water area 15, and FIG. 3 is a top view of the algae collection means 12A.

As shown in FIGS. 2 and 3, the algae collecting means 12A mainly includes an algae collecting section 13, an algae guiding section 17, and a connecting and fixing member 19 that integrally connects and fixes the algae collecting section 13 and the algae guiding section 17. It consists of In this embodiment, a parallel cross structure is used as the connecting and fixing member 19, but the present invention is not limited to this.

The algae collection unit 13 has a plurality of first rod-shaped members 13A, 13A... that are capable of floating in the surface water of the closed water area 15 arranged radially so that an inlet 13B through which floating algal blooms flows is closer to an outlet 13C. It is also constructed by forming a plurality of collection channels 13D, 13D, . Then, the algae collecting means 12B is arranged in a floating state in one of the plurality of collection channels 13D.

Note that by forming three or more collection waterways 13D, the collection waterways 13D can be arranged radially. However, as shown in FIGS. 2 and 3, four first rod members 13A are arranged radially at 90° intervals to form four collection channels 13D, and the inverted V-shaped angle θ of the collection channels 13D is More preferably, the angle is 90°.

The reason for this is that, as shown in Figure 4, in the case of three waterways, the inverted V-shaped angle θ of one collection waterway 13D is an obtuse angle of 120°, so the algae that has flowed into the collection waterway 13D will return to the collection waterway. There is a danger that it will flow out of 13D. For example, when the wind blows from the direction of arrow P in FIG. There is a risk that the blue-green algae collected in 13D will flow out of the collection waterway 13D again.

On the other hand, as shown in FIG. 5, when the number of collection channels is five or more, it is necessary to increase the number of guide channels 17B of the algae guiding section 17 accordingly, and the channel width W of each guide channel 17B is increased. becomes narrower. Therefore, the flow of surface water tends to stay in the guiding waterway 17B. Thereby, there is a risk that the algae collected in the collection waterway 13D will be difficult to flow efficiently to the algae collection means 12B. Incidentally, in order to prevent surface water from stagnation in the guide channel 17B, it is preferable that the channel width W of each guide channel 17B is 100 mm or more.

Therefore, in the embodiment of the present invention, a case will be described below in which there are four collection channels 13D, and the four first rod-shaped members 13A are arranged radially at 90° intervals.

In addition, the algae guide unit 17 arranges a plurality of second rod-shaped members 17A, 17A, which are capable of floating in the surface water of the closed water area 15, continuously and parallel to the outlet ports 13C of the plurality of collection channels 13D. It is configured by forming a plurality of guiding waterways 17B, 17B, . . . that guide the algae collected in the plurality of collecting waterways 13D toward the algae collecting means 12B.

Then, the plurality of first rod-shaped members 13A forming the collection waterway 13D and the plurality of second rod-shaped members 17A forming the guide waterway 17B are connected and fixed to be integrated by the connection and fixing member 19. Thereby, the algae collecting means 12A is constructed.

The first rod-shaped member 13A and the second rod-shaped member 17A are not particularly limited as long as they are rod-shaped members that can float on water and have a thickness that can guide the flow of surface water in the closed water area 15, but both ends are watertight. Preferably, it is a PVC pipe. PVC pipes are lightweight, impact resistant, corrosion resistant, durable, and workable, and are inexpensive. PVC pipes are watertight at both ends and have air trapped inside, allowing them to form a channel for surface water. Can float to a certain extent.

The diameters of the first rod-shaped member 13A and the second rod-shaped member 17A are such that they can guide the flow of surface water flowing in the direction in which the wind blows, and allow algal blooms floating along with the flow of surface water to climb over or submerge into the collection channel. It only needs to be thick enough to prevent it from flowing out of the guide waterway 13D and the guide waterway 17B. Moreover, if the diameters of the first rod-shaped member 13A and the second rod-shaped member 17A are too large, they will not only be heavy and inconvenient to handle, but also cause the width of the guide channel 17B to be narrowed. Specifically, the diameter of the first rod-shaped member 13A and the second rod-shaped member 17A is preferably about 50 to 100 mm.

Further, the first rod-shaped member 13A and the second rod-shaped member 17A can be formed in advance as separate rod-shaped members, and then connected later with a joint member (not shown). However, since PVC pipes are easy to process, the first rod-shaped member 13A and the second rod-shaped member 17A can be formed from one continuous PVC pipe as in this embodiment. For example, as shown in FIG. 3, one end side of two PVC pipes is bent into a curved shape to form the second rod-shaped member 17A, and one end side of two PVC pipes is further bent. is bent into a hook shape to form the second rod-shaped member 17A. Then, the four PVC pipes are lined up as shown in FIG. 3, and the four PVC pipes are integrally fixed using the connecting and fixing member 19. Thereby, algae collecting means 12A can be formed.

Moreover, as shown in FIG. 6, it is preferable that the first rod-shaped member 13A used in the collection waterway 13D is expandable and retractable due to its nested structure. Since the size and shape of the closed water area 15 are not uniform, the size of the collection waterway 13D can be varied according to the size of the closed water area 15 by forming the first rod-shaped member 13A into a nested structure. Furthermore, by forming the first rod-shaped members 13A into a nested structure, the lengths of the plurality of first rod-shaped members 13A can be changed according to the shape of the closed water area 15, so that even complex-shaped closed water areas 15 can be accommodated. A corresponding collection channel 13D can be formed.

In this case, it is preferable to provide watertight means so that watertightness is not lost due to the nested structure. The watertight means may be of any type as long as it can be made watertight, and for example, the structure shown in FIG. 6 can be used. As shown in FIG. 6, the expansion/contraction stroke portion S between the thick first rod-like member 13A1 and the thin first rod-like member 13A2 is made into a screw structure 21, and a sealing member 23 (for example, an O-ring) is provided at the boundary position where they fit together. establish. Thereby, watertightness can be maintained even if the first rod-shaped member 13A has a nested structure.

7 shows a preferred embodiment of the algae collecting means 12A, FIG. 7(A) is a side view of the first rod-shaped member 13A forming the collection channel 13D, and FIG. 7(B) is a side view of the first rod-shaped member 13A. It is a figure which looked at member 13A from one end side.

As shown in FIG. 7, the algae collecting means 12A includes a sheet-like member 25 that is suspended from the first rod-like member 13A and has approximately the same width as the first rod-like member 13A, and a sheet-like member 25 that is suspended in the surface water. It further includes a weight member 27 for causing the load. Reference numeral 29 is a string-like member that connects the sheet-like member and the weight member. Thereby, it is possible to reliably avoid the risk that the blue-green algae that has flowed into the collection waterway 13D will go under the first rod-shaped member 13A and return to the closed water area 15 again.

Further, as shown in FIGS. 2 to 5 and 7, it is preferable to further include an inverted V-shaped angle variation prevention means 31 for preventing variations in the inverted V-shaped angle θ of the plurality of collection channels 13D. The inverted V-shaped angle variation prevention means 31 includes pin members 31A each erected at the position of the inlet 13B of the plurality of first rod-shaped members 13A forming the collection waterway 13D, and adjacent pin members of the pin member 31A. It is composed of a string-like member 31B that connects the members 31A in a tensed state.

Thereby, it is possible to prevent the inverted V-shaped angle θ of the collection waterway 13D from becoming wider than the setting, and it is also possible to prevent damage to the collection waterway 13D. That is, when the length of the first rod-shaped member 13A constituting the collection waterway 13D is long, the first rod-shaped member 13A is curved by the flow of surface water flowing in the direction in which the wind blows, and the inverted V-shaped angle θ is set. There is a possibility that it will spread further than the above. As explained in the case of the three waterways mentioned above, if the inverted V-shaped angle θ becomes wider than the setting, depending on the direction of the wind, there is a risk that the blue-green algae that has flowed into the collection waterway 13D may flow out from the collection waterway 13D again. . Furthermore, if the inverted V-shaped angle θ is wide enough, the first rod-shaped member 13A may break or otherwise be damaged.

In the above description, the collection waterway 13D was mainly explained among the collection waterway 13D and the guide waterway 17B that constitute the algae collecting means 12A. However, it is important how to efficiently guide the algae collected in the collection waterway 13D to the algae collection means 12B. Therefore, it is more preferable to provide the plurality of guiding channels 17B with a water flow generating means 33 that generates a water flow in the surface water of the guiding channels 17B from the collection channel 13D toward the algae collection means 12B.

FIG. 8 is a top view of the water flow generation means 33 provided in the guiding waterway 17B, and FIG. 9 is a partially enlarged perspective view mainly illustrating the water flow generation means 33 of FIG. 8.

As shown in FIGS. 8 and 9, the water flow generation means 33 includes three water turbines 33A provided in each of the three guide channels 17B, and a rotating shaft 33B that penetrates and supports the centers of the three water turbines 33A. Four bearings 33C that are respectively provided on the four second rod-shaped members 17A that constitute the guiding waterway 17B and rotatably support the rotating shaft 33B, and a rotational power mechanism that rotates the rotating shaft 33B in the direction of arrow F. 33D.

As the rotational power mechanism 33D, a first pulley 33E is provided at one end of the rotating shaft 33B, and a timing belt 33J is attached to a second pulley 33H attached to the rotating shaft 33G of the motor 33F provided on the connecting and fixing member 19 having a grid structure. It is constructed by passing it over.

Note that the motor 33F and the bearing 33C are preferably waterproof, and a resin bearing can be used as the bearing 33C. Further, in the algae treatment system 10 according to the embodiment of the present invention, a control unit (not shown) that controls the entire system is installed in the algae destruction device 14 placed on land in a closed water area. Therefore, it is possible to provide the motor 33F with wireless auxiliary equipment for controlling it by wireless instructions from the control unit, and to control the water flow generating means 33 (for example, ON/OFF of the motor 33F, rotation speed of the water turbine 33A, etc.). preferable.

As a result, a flow of surface water directed toward the algae collection means 12B is generated in the guiding waterway 17B, so the algal blooms collected by the collection waterway 13D quickly flow through the guiding waterway 17B and reach the algae collection means 12B. Therefore, algae can be collected more efficiently by the algae collecting means 12B.

In addition, in FIG. 9, the diameter of the tip part 17A1 (algae collecting means 12B side) of the second rod-shaped member 17A is made smaller. This is because by enlarging the diameter of the tip of the guide channel 17B, water flow resistance in the guide channel 17B against the forced flow of surface water by the water turbine 33A is less likely to occur, so that the flow in the guide channel can be made smoother. can.

(Algae collection means)
As shown in FIGS. 2 and 3, the algae collection means 12B is arranged in a floating state in one of the plural collection channels 13D formed radially in the algae collection means 12A.

FIG. 10 is a perspective view of the algae collection means 12B.
As shown in FIG. 10, the algae collection means 12B mainly includes a device frame 26, a garbage separation drum 28, and a plurality of support rollers 30, 30, . . . that rotatably support the garbage separation drum 28 on the device frame 26. It is composed of a motor 32 (rotational power means) that rotates the dust separation drum 28, a floating member 34 that floats the device frame 26, a suction nozzle 36, a discharge nozzle 38, and a plurality of schemas 40, 40, . . .

The algae collected in the collection waterway 13D of the algae collection means 12A, passed through the guide waterway 17B, and collected in the algae collection means 12B are sucked together with the surface water from the suction nozzle 36 of the algae collection means 12B. In addition, in the following description, surface water containing algae will be hereinafter referred to as "water containing algae."

The device frame 26 is formed into a gate shape through which algae-containing water can flow. That is, it has a gate-shaped frame structure in which the upper ends of a pair of rectangular leg frames 26A, 26A, which are erected to face each other on the left and right sides, are connected to each other by a rectangular upper surface frame 26B. This gate-shaped device frame 26 forms a waterway through which algae-containing water can flow from the front gate side A (front side in FIG. 10) to the rear gate side B (back side in FIG. 10) of the device frame 26 without stagnation. Ru.

The material of the device frame 26 is not particularly limited as long as it is not easily corroded by water, but stainless steel or hard resin can be suitably used. Note that the device frame 26 is not limited to the above-described gate shape as long as it has a frame structure that allows surface water to flow without stagnation.

The dust separation drum 28 is formed in a cylindrical shape and is disposed laterally within the frame structure of the device frame 26 orthogonal to the flow direction of surface water. The size of the dust separation drum 28 is, for example, approximately 300 mm to 500 mm in diameter and approximately 500 mm to 1500 mm in length. The material of the dust separation drum 28 is not particularly limited as long as it is not easily corroded by water, but stainless steel can be suitably used.

Further, as shown in FIGS. 11 and 12, a filter 42 is formed on the circumferential surface of the dust separation drum 28, and flat portions 44 for contacting the support roller 30 are formed at both ends of the circumferential surface. Further, a side plate 46 is provided on the side surface of the garbage separation drum 28, and the side plate 46 has one end of a suction pipe 20 that sucks and takes in algal blooms together with surface water, and a discharge pipe 22 that discharges water that washes the filter 42. An introduction port 48 is opened to introduce one end of the dust separation drum 28 into the dust separation drum 28.

The dust separation drum 28 in FIG. 11 has a filter 42 made of punched metal, and the dust separation drum 28 in FIG. 12 has a filter 42 made of wire mesh. The opening (pore diameter D) of the punching metal and wire mesh is preferably in the range of 2 mm to 5 mm.

As described in the prior art, colonies of algae have a scale of several tens to hundreds of μm, and if the opening of the filter 42 is 2 mm or more, the algae in the form of a colony in water containing algae can pass through the filter 42. , 5 mm or less, it is possible to prevent dirt and the like in water containing blue-green algae from passing through the filter 42. Further, although details will be described later, if the opening of the filter 42 is 5 mm or less, the impeller of the algae destruction device 14 will not be clogged.

Further, as shown in FIG. 10, the dust separation drum 28 is supported by a total of six support rollers 30 rotatably supported by a pair of leg frames 26A, 26A of the apparatus frame 26, three of which are rotatably supported. Both end peripheral surfaces (flat parts 44) of the separation drum 28 are supported at three points, respectively.

Of the three support rollers 30 supported at three points, two support rollers 30 support the bottom position of the end peripheral surface of the dust separation drum 28 at the same horizontal level, and the remaining support rollers 30 support the dust separation drum 28 at the same horizontal level. The upper end position of the end circumferential surface of 28 is supported. It is preferable that the shape connecting the three support rollers 30 is an equilateral triangle. In FIG. 10, the support roller 30 that supports the upper end position of the peripheral surface of the end portion of the dust separation drum 28 is supported by a flange 26C that projects downward from the device frame 26.

Further, the support roller 30 is formed in a stepped structure with a disk-shaped large diameter portion 30A on the apparatus frame 26 side and a cylindrical small diameter portion 30B continuous to the large diameter portion 30A, and has a stepped structure at the end of the dust separation drum 28. The small diameter portion 30B is in contact with the circumferential surface, and the large diameter portion 30A is in contact with the end side surface. In this way, by forming the support roller 30 into a stepped structure, the dust separation drum 28 is prevented from shifting in the axial direction.

Note that the support roller 30 can be configured such that a roller portion is provided on a shaft 30C that is cantilever-supported on the device frame 26 via a bearing (not shown), or that the shaft 30C of the support roller 30 is attached to a bearing that is fixed to the device frame 26. Any mode of support may be used. In this case, it is preferable to use a resin bearing suitable for rotation in water.

Further, a motor 32 is installed on a flange 26D that projects horizontally from the upper frame 26B, and a pulley 50 is installed on a rotating shaft 32A of the motor 32. The motor 32 is preferably a waterproof motor as described for the algae collection means 12A, and is provided with wireless accessory equipment for controlling by wireless instructions from the control unit of the algae destruction device 14. It is preferable to turn the motor ON and OFF, the rotation speed of the water wheel, etc.

On the other hand, a pulley 52 is also provided on one of the pair of support rollers 30 that supports the upper end of the dust separation drum 28 for rotational driving. Although FIG. 12 shows a case in which the large diameter portion 30A of the support roller 30 is also used as the pulley 52, the pulley 52 may be provided separately.

An endless timing belt 54 is stretched between the pulley 50 of the motor 32 and the pulley 52 of the support roller 30. As a result, when the motor 32 is driven, the rotationally driven support roller 30 is rotated via the timing belt 54, and the dust separation drum 28 is further rotated. In this case, in order to easily transmit the rotational power of the rotationally driven support roller 30 to the dust separation drum 28, the peripheral surface of the small diameter portion 30B of the rotationally driven support roller 30 and the flat end portion of the dust separation drum 28 are The circumferential surface of the portion 44 may be made of rubber to prevent slipping, or a plurality of striped grooves parallel to the axial direction may be formed on the circumferential surface of the small diameter portion 30B and the circumferential surface of the flat portion 44.

The floating members 34 are fixed to the leg frames 26A on both the left and right sides of the device frame 26, and float the device frame 26 so that the lower part of the dust separation drum 28 is immersed in the surface water. The floating member 34 is not particularly limited, and may be a polystyrene foam, a hollow resin cylinder with both ends closed (for example, a PVC pipe), or the like.

As shown in FIGS. 10 and 13, the suction nozzle 36 is provided within the dust separation drum 28 and supported in communication with the suction piping 20. Further, the suction nozzle 36 is formed such that a slot-shaped suction port 36A that is long in the axial direction of the dust separation drum 28 is immersed in the surface water (see FIG. 1).

Therefore, it is preferable that the buoyancy of the floating member 34 described above can be adjusted so that the suction port 36A of the suction nozzle 36 is immersed in the surface water. As a method for adjusting the buoyancy of the floating member 34, for example, there is a method of changing the amount of the weight adjusting member inserted into a hollow resin cylinder whose both ends are closed.

Further, the suction nozzle 36 is arranged diagonally downward, facing toward the front gate side A of the device frame 26 (see FIG. 10). Furthermore, the suction nozzle 36 is formed in a trumpet-like shape with a suction port 36A larger than a communication port (not shown) communicating with the suction pipe 20 (see FIG. 13). It is preferable that the slot-shaped opening area of the suction port 36A is larger than the rectangular area of the schema 40. As a result, algae-containing water flowing from the front gate side A to the rear gate side B of the device frame 26 is easily taken in through the suction port 36A of the suction nozzle 36.

As shown in FIGS. 10 and 14, the discharge nozzle 38 is provided within the dust separation drum 28 and supported in communication with the discharge pipe 22. Further, the discharge nozzle 38 is formed such that a slot-shaped discharge port 38A that is long in the axial direction of the dust separation drum 28 is exposed above the water surface of the surface water (see FIG. 1). Further, the discharge nozzle 38 is formed in the shape of an inverted trumpet tube in which a discharge port 38A is smaller than a communication port (not shown) communicating with the discharge pipe 22 (see FIG. 14). Thereby, the cleaning water can be vigorously sprayed onto the inner surface of the filter 42 of the dust separation drum 28 from the discharge port 38A of the discharge nozzle 38, and the cleaning effect of the filter 42 can be enhanced.

Note that, as shown in FIG. 1, if a cleaning nozzle 56 for cleaning the outer surface of the filter 42 is provided outside the dust separation drum 28, the cleaning effect of the filter 42 can be further enhanced. In this case, it is preferable that the cleaning nozzle 56 be communicated with the discharge pipe 22 via the branch pipe 58. This eliminates the need to separately provide piping for cleaning water.

As shown in FIG. 10, a plurality of schemata 40 are provided in a protruding state on the outer surface of the dust separation drum 28, and are formed in the shape of a rectangular plate that is long in the axial direction of the dust separation drum 28. Therefore, the schema 40 rotates together with the rotation of the garbage separation drum 28, and scrapes up the algal blooms flowing from the guiding waterway 17B of the algae collecting means 12A. Although the number of schemas 40 is not particularly limited, it is preferable that there are four or more schemata arranged at equal intervals in the circumferential direction of the dust separation drum 28.

The algae-containing water sucked by the suction nozzle 36 of the algae collection means 12B is sent to the algae destruction device 14 located on land. As shown in FIG. 1, the algae collection means 12B is connected to the algae destruction device 14 through a suction pipe 20 and a discharge pipe 22. Further, a pressure regulating means 16 is provided in the discharge pipe 22, and a pressure gauge 24 is provided between the pressure regulating means 16 and the algae destruction device 14.

Next, the algae destruction device 14 of the algae treatment system 10 will be explained.

(algae destruction device)
FIG. 15(A) is an overall configuration diagram of the floating algae destruction device 14 having a multi-stage volute pump structure, and FIG. 15(B) is an enlarged cross-sectional view of a part of the inside of the multi-stage volute pump structure.

The algae destruction device 14 having a multi-stage centrifugal pump structure is configured such that a plurality of impeller chambers 66 each having an impeller 64 (impeller) are formed in a casing 62 so that the pressure is higher than in the case of one stage. The floating algae destruction device 14 is installed on a pedestal 68 installed on land 18.

As shown in FIG. 15(A), a pump inlet 70 is opened at the center of the side surface of one end of a cylindrical casing 62, and a discharge part 72 is formed at the other end and has a discharge chamber formed therein. A pump outlet 74 is opened in the surface. The other end of the suction pipe 20 is connected to the pump inlet 70, and the other end of the discharge pipe 22 is connected to the pump outlet 74.

Further, a motor 76 for rotating the impeller 64 is arranged adjacent to the discharge section 72 . The rotating shaft 76A of the motor 76 is attached to pass through the casing 62, and a shaft seal (not shown) is applied to prevent water from leaking from the gap between the casing 62 and the rotating rotating shaft 76A. Note that illustration of a bearing that supports the rotating shaft 76A is omitted.

Furthermore, the inside of the casing 62 is divided into four impeller chambers 66 by three partition walls 78, forming a four-stage multi-stage centrifugal pump structure. Although FIG. 15 illustrates an example of a four-stage multi-stage centrifugal pump structure, the number of stages is preferably in the range of 4 to 10 stages. Moreover, it is preferable to have a pressure capacity of 0.5 MPa (5 kgf/cm ² ) or more.

Furthermore, communication ports 80 are opened in the centers of the three partition walls 78, respectively. An impeller 64 is disposed in each of the four impeller chambers 66, and each impeller 64 is supported by a rotating shaft 76A of a motor 76 disposed through three communication ports 80. The diameter of the communication port 80 formed in the partition wall 78 is larger than the diameter of the rotating shaft 76A of the motor 76, and the four impeller chambers 66 are communicated through the communication port 80.

As shown in FIG. 15(B), the impeller 64 has two shrouds 64B (side plates) covering both sides of a plurality of blades 64A, and a center portion of the shrout on the pump inlet 70 side of the two shrouds 64B. A closed-type impeller 64 is provided, which has a suction port 82 formed therein and a discharge gap 84 formed around its periphery. The width W of the discharge gap 84 of the impeller 64 is preferably 4 mm to 10 mm, more preferably 5 mm to 7 mm.

When the motor 76 is driven to rotate the four impellers 64 at high speed, the outer circumference of the impeller 64 becomes high pressure due to the action of centrifugal force, and the center part of the impeller 64 becomes low pressure because almost no centrifugal force acts thereon. As a result, the pressure at the pump inlet 70 of the casing 62 becomes low, and a suction force is generated at the pump inlet 70, and the algae-containing water is sucked from the suction nozzle 36 of the algae collection means 12B by this suction force.

Further, as shown in FIG. 1, a pressure adjustment means 16 is provided in the middle of the discharge pipe 22, and a pressure gauge 24 is provided between the pump outlet 74 and the pressure adjustment means 16. The pressure adjustment means 16 increases the discharge pressure of the multistage centrifugal pump structure by narrowing the flow path of the discharge piping 22, and increases the discharge pressure to 0.5 MPa (5 kgf/cm ² ) or more, 1.0 MPa (10 kgf/cm 2 ) or more. ² ) It is preferable to adjust to the following.

Although the closed type impeller 64 can efficiently apply centrifugal force to the liquid, the discharge gap 84 of the impeller 64 is narrow as described above, and is easily clogged with foreign matter such as algae in the algae-containing water. Therefore, it is preferable that the opening of the filter 42 of the dust separation drum 28 of the algae collecting means 12B is set smaller than the width W of the discharge gap 84 of the impeller 64.

[Blue-green algae treatment method]
Next, algae generated in the closed water area by the algae treatment system 10 configured as described above is collected by the algae collection means 12A, then collected by the algae collection means 12B, and finally the algae destruction device 14 destroys the algae. The processing method up to this point will be explained.

FIG. 16 is a diagram showing, as an example of the closed water area 15, algal blooms generated in a gourd-shaped swamp 15A are deposited in a snowdrift, and the accumulated blue-green blooms are treated by the algae treatment system 10 according to the embodiment of the present invention. This is an example.

In FIG. 16, the mesh-shaped portion indicates algae colonies 35, 35 that were deposited in a snowdrift on one side of the swamp 15A when the wind in the M direction blows in the swamp 15A. Furthermore, the dot-shaped portions indicate algae colonies 37, 37 that were deposited in the snowdrift on the other side of the swamp 15A when the wind in the N direction blows in the swamp 15A.

In this case, depending on the size and shape of the swamp 15A, the number and installation locations of the algae removal devices 12A for collecting and recovering blue-green algae can be appropriately selected. A case will be explained in which 12A each (two units in total) are provided.

First, the operation of the algae collection means 12A in the algae removal device 12 will be explained.

As shown in FIG. 16, the algae collection section 13 of the algae collection means 12A has four radial inverted V-shaped collection channels 13D into which floating algal blooms flow. Thereby, the four collection waterways 13D can cover all directions of the swamp 15A, north, south, east and west. Moreover, in this embodiment, by arranging the algae collecting means 12B in the collecting channel 13D among the four collecting channels 13D, where the inlet 13B is not facing the snowdrift where the algae colonies 35 and 37 are deposited, the algae collecting means 12B is mainly Blue-green algae was collected from the remaining three waterways.

As a result, wind blows in the direction of arrows M, N, K, and R in the swamp 15A, changing the direction in which the surface water flows, and the direction in which the algae colonies 35 and 37 flow along with the flow of the surface water also changes accordingly. Even if it changes accordingly, most of the algae colonies 35, 37 flow into any one of the collection channels 13D (one or more).

Therefore, blue-green algae occurring in the swamp 15A can be efficiently collected regardless of the direction of the wind blowing in the swamp 15A. Furthermore, since it is not necessary to provide the algae collection means 12B for each of the plurality of collection channels 13D, the device cost of the algae collection means 12B can also be kept low.

In FIG. 16, two algae removal devices 12 are used, but if the size of the swamp 15A is small, it is also possible to set one algae removal device 12 in the center of the swamp 15A. .

The algal blooms that have flowed into any of the four collection channels 13D are guided to the algae collection means 12B through the guide waterway 17B and collected by the algae collection means 12B.

Incidentally, FIG. 17 shows a case where blue-green algae colonies 35 and 37 are collected using a water quality maintenance device 39 equipped with a guiding means 39A according to the prior art (Patent Document 3).

Since the guiding means 39A of the water quality maintenance device 39 of the prior art can only handle the flow of surface water in one direction, it is difficult to collect the four algae colonies 35 and 37 deposited in the snowdrift as shown in FIG. In this case, four water quality maintenance devices 39 must be installed for each blue-green algae colony 35, 37, resulting in poor efficiency and high device cost.

Moreover, the algae collection means 12A of the preferred embodiment of the present invention has the following preferred configuration for increasing collection and recovery efficiency.

That is, since the sheet-like member 25 is made to hang down into the surface water from the first rod-like member 13A of the collection waterway 13D, the algae that has flowed into the collection waterway 13D can be reliably collected.

In addition, in the algae collection means 12A of the preferred embodiment of the present invention, the first rod-shaped member 13A of the collection waterway 13D is made into a nested structure so that it can be expanded and contracted, so that the size of the collection waterway 13D can be changed according to the size of the swamp 15A. can. Furthermore, since the first rod-like members 13A of the collection waterway 13D are made to have a nested structure and are expandable, the lengths of the plurality of first rod-like members 13A can be changed according to the shape of the swamp 15A. The collection channels 13D can be formed radially even in the complex-shaped swamp 15A while maintaining the inverted V-shaped angle θ.

As mentioned above, the algae collected in the collection waterway 13D of the algae collection means 12A passes through the guide waterway 17B and is collected by the algae collection means 12B.

In this collection, the algae collection means 12A of the preferred embodiment of the present invention is provided with a water flow generation means 33 that generates a water flow of surface water directed from the collection waterway 13D toward the algae collection means 12B in the plurality of guiding waterways 17B. This can prevent surface water from accumulating in the guiding waterway 17B, making it possible to more efficiently collect and recover the blue-green algae colonies 35, 37 that have occurred in the swamp 15A.

Next, the operation of the algae collection means 12B will be explained.

The algae collection means 12B is equipped with a mechanism for selectively collecting the algae by separating the garbage in the swamp 15A collected together with the algae by the algae collection means 12A. That is, the suction port 36A of the suction nozzle 36 provided in the dust separation drum 28 is immersed in the surface water. However, the introduction port 48 formed in the side plate 46 of the dust separation drum 28 should not be immersed in the surface water.

Then, the motor 32 of the algae collecting means 12B is driven to rotate the dust separation drum 28 in the direction of the arrow X in FIG. As a result, algal blooms floating around the algae collection means 12B are scraped up by the plurality of schemata 40 protruding from the outer surface of the garbage separation drum 28, and the garbage separation drum 28 is removed from the front gate side A of the gate-shaped device frame 26. A flow of algae-containing water is formed on the posterior gate side B by passing through the lower part of the water.

In this case, the device frame 26 is formed into a gate shape that allows water containing algae to flow from the front gate side A to the rear gate side B, and furthermore, six support rollers 30 rotatably supported by the device frame 26 are connected to a dust separation drum. Since the circumferential surface of both ends of the tube 28 is supported at three points, it is possible to prevent algal blooms and dirt from getting caught on the device frame 26 and the support rollers 30 and stagnate the flow of algae-containing water. Thereby, not only can the algal blooms in the algae-containing water be efficiently suctioned from the suction port 36A of the suction nozzle 36, but also maintenance is facilitated since no dirt remains.

Further, by supporting the circumferential surface of both ends of the dust separation drum 28 at three points with six support rollers 30 rotatably supported by the device frame 26, the dust separation drum 28 can be stably supported. . On the other hand, the garbage collected together with algae in the schema 40 is separated by the filter 42 of the garbage separation drum 28, and is carried on the flow of surface water flowing from the front gate side A to the rear gate side B of the gate-shaped device frame 26. Return to the swamp 15A from the rear gate side B of the device frame 26.

Thereby, it is possible to provide an algae collection means 12B that can selectively collect only floating algae such as blue-green algae and requires almost no maintenance.

The algae-containing water sucked into the suction port 36A of the suction nozzle 36 is sent through the suction pipe 20 to the algae destruction device 14 that destroys the algae.

Next, the operation of the algae destruction device 14 for destroying the algae collected by the algae collection means 12B will be explained.

That is, the motor 76 of the algae destruction device 14 having a multi-stage centrifugal pump structure is driven to rotate the four impellers 64 at high speed. As a result, a suction force is generated at the pump inlet 70 of the casing 62 of the algae destruction device 14, so that the suction force is applied to the suction nozzle 36 of the algae collection means 12B via the suction pipe 20. Therefore, the blue-green algae-containing water collected by the schema 40 passes through the filter 42 of the garbage separation drum 28, is taken into the suction pipe 20 from the suction port 36A of the suction nozzle 36, flows through the suction pipe 20, and is sent to the algae destruction device 14. liquid.

The blue-green algae-containing water sent to the algae destruction device 14 is taken into the first-stage impeller chamber 66 from the pump inlet 70 of the casing 62 . The blue-green algae-containing water is sucked in from the suction port 82 of the first-stage impeller 64, and is discharged at high pressure from the discharge gap 84 toward the inner surface of the casing 62 due to centrifugal force.

As a result, the blue-green algae in the blue-green algae-containing water collide with the inner surface of the casing 62 with great force, so that the colony of blue-green algae is finely divided and the gas sacs of the cells of the blue-green algae are destroyed. Furthermore, by applying a certain high pressure (0.5 MPa or more) inside the casing 62 of the algae destruction device 14, the gas sacs of the algae cells can be efficiently destroyed.

In this case, since the appropriate pressure of the algae destruction device 14 for dividing and destroying varies depending on the type of floating algae such as blue-green algae, it is preferable to adjust the pressure using the pressure adjustment means 16.

The blue-green algae-containing water discharged from the discharge gap 84 of the first-stage impeller 64 flows into the second-stage impeller chamber 66 from the communication port 80 of the first-stage partition wall 78 at an increased flow rate, and flows into the second-stage impeller chamber 66. The impeller 64 performs the same dividing and breaking processes as the first-stage impeller 64 . Similarly, the algae-containing water is further subjected to repeated dividing and destruction processes by the third and fourth impellers 64, and then is discharged from the pump outlet 74 of the discharge section 72 to the discharge pipe 22.

In this way, in the algae destruction device 14 having a multi-stage centrifugal pump structure, as the number of stages of the impeller 64 increases, the flow rate of the water containing algae increases, and the water containing algae increases from the discharge gap 84 of the impeller 64 to the inner surface of the casing 62. Two destructive actions can be performed in multiple stages: collision destruction in which the algae are destroyed by collision, and pressure destruction in which a certain high pressure (0.5 MPa or more) is applied within the casing 62 to destroy the algae. Thereby, colonies of blue-green algae in water containing blue-green algae can be efficiently divided and destroyed.

By the way, when dividing and destroying all of the algal blooms contained in algae-containing water is taken as 100%, the effectiveness of conventional algae destruction devices for dividing and destroying algal blooms was limited to about 80%. , the algae destruction device 14 in the present invention can be approximately 90% or more. That is, by treating algae-containing water with the algae destruction device 14 employed in the algae treatment system 10 of the present invention, it is possible to substantially eliminate untreated algae in the dividing or destruction treatment. Thereby, even if the algae-containing water treated with the algae treatment system 10 of the present invention is returned to the swamp 15A, the growth of algal blooms can be reliably suppressed.

In the above algae destruction device 14, when air bubbles are mixed in the algae-containing water in the algae destruction device 14, a pressure drop occurs in the algae destruction device 14, which tends to reduce the effectiveness of the algae destruction device 14.

As a countermeasure against this, it is preferable to provide a deaeration tank 60 (deaeration means) between the algae destruction device 14 and the suction pipe 20, as shown in FIG. That is, the algae-containing water sucked by the suction nozzle 36 of the algae collection means 12B is caused to flow into the degassing tank 60 and stored therein, thereby deaerating the air bubbles in the algae-containing water. In this case, since the suction force generated by the algae destruction device 14 cannot be used as the suction force of the suction nozzle 36, the suction pipe 20 is provided with a water intake pump (not shown).

Then, the algae destruction device 14 is arranged vertically so that the pump inlet 70 of the casing 62 is located near the bottom of the algae-containing water stored in the deaeration tank 60. This makes it possible to eliminate air bubbles in the algae-containing water that is taken into the algae destruction device 14, so that the effects of the dividing treatment and destruction treatment are not reduced.

In addition, in FIG. 18, the explanation has been made by providing the deaeration tank 60 as a deaeration means, but a deaeration device (not shown) equipped with a vacuum pump may be provided in the middle of the suction piping 20. .

It should be noted that the treated water that has been subjected to the dividing treatment and destruction treatment in the algae destruction device 14 will be referred to as blue-green algae-containing treated water.

Next, the algae-containing treated water discharged from the algae destruction device 14 to the discharge pipe 22 is vigorously discharged from the discharge port 38A of the discharge nozzle 38 toward the inner surface of the dust separation drum 28. As a result, even if garbage such as a polyethylene bag is stuck to the surface of the garbage separation drum 28, the water discharged from the inside of the garbage separation drum 28 can blow away the stuck garbage and peel it off from the filter 42. .

In addition, by a branch pipe 58 branching from the discharge pipe 22, a part of the algae-containing treated water flowing through the discharge pipe 22 is vigorously discharged from the cleaning nozzle 56 toward the outer surface of the filter 42 of the dust separation drum 28. The discharge pressure that has the ability to clean the filter 42 only needs to be 0.1 MPa. Therefore, the pressure adjustment means 16 may be adjusted so that the pressure of the algae destruction device 14 is 0.5 MPa or more, and the discharge pressure from the discharge nozzle 38 and the cleaning nozzle 56 is 0.1 MPa.

Thereby, the filter 42 of the dust separation drum 28 can be automatically cleaned with the treated water containing blue-green algae. In this case, the algae in the algae-containing treated water are finer than the algae colonies (scale of several tens to hundreds of μm) described in the prior art, so they do not clog the filter 42.

Then, the dirt removed from the filter 42 by automatic cleaning returns to the swamp 15A from the rear gate side B of the device frame 26 by the flow of surface water from the front gate side A to the rear gate side B of the gate-shaped device frame 26.

As a result, the floating algae treatment system 10 of the present invention allows the algae collection means 12A to efficiently collect algae regardless of the direction of the wind blowing in the closed water area 15 such as the swamp 15A, and the algae collection means 12B to collect the algae. Not only this, but also almost no maintenance of the algae collection means 12B is required. Furthermore, the algae destruction device 14 having the above structure can achieve excellent dividing and destruction effects.

Although not shown, the fact that the treated water containing algae is vigorously discharged from the discharge port 38A of the discharge nozzle 38 toward the inner surface of the garbage separation drum 28 is used to move the garbage separation drum 28 like a water wheel using water pressure. A configuration in which the motor 32 is not used by rotating is possible. That is, a plurality of water wheel blades are formed on the inner surface of the garbage separation drum 28, and the garbage separation drum 28 is rotated by applying the algae-containing treated water from the discharge port 38A of the discharge nozzle 38 to the blades.

[Another form of algae treatment system]
The algae treatment system 10 of FIG. 19 is a perspective view in which the floating algae destruction device 14 having a multi-stage volute pump structure is mounted on the device frame 26 of the algae collection means 12B described above to form an integrated system. Since the components constituting the separate algae treatment system 10 and the integrated floating algae treatment system 10 described above are the same, explanations of the components will be omitted.

Furthermore, the integrated floating algae treatment system 10 in FIG. 19 does not show the pressure gauge 24, cleaning nozzle 56, and deaeration tank 60 (deaeration means), which were explained separately.

In this way, by making the algae treatment system 10 into an integrated type, it is not only possible to make the algae treatment system 10 more compact, but also easier to transport and handle. In the case of an integrated type, a power supply device (not shown) for the motor 32 that rotates the garbage separation drum 28 of the algae collection means 12B and the motor 76 that rotates the impeller 64 of the algae destruction device 14 is mounted on the device frame 26. For example, floating algae can be treated by freely moving a closed water area 15 such as a lake, pond, river, or closed sea area.

Although the above-mentioned processing system 10 has been described as an example of treating blue-green algae, the present invention can be similarly applied to red tide.

DESCRIPTION OF SYMBOLS 10... Algae treatment system, 12... Algae removal device, 12A... Algae collection means, 12B... Algae collection means, 13... Algae collection part, 13A... First rod-shaped member, 13A1... Thick first rod-shaped member, 13A2... Thin first rod-shaped member Rod-shaped member, 13B...Inlet, 13C...Outlet, 13D...Collection channel, 14...Algae destruction device, 15...Closed water area, 15A...Swamp, 16...Pressure adjustment means, 17...Algae guiding section, 17A...Second rod-shaped Member, 17A1...Tip of second rod-shaped member, 17B...Guiding waterway, 18...Land, 19...Connection fixing member, 20...Suction piping, 21...Threaded structure, 22...Discharge piping, 23...Sealing member, 24... Pressure gauge, 25... Sheet member, 26... Device frame, 26A... Leg frame, 26B... Top frame, 26C... Flange, 26D... Flange, 27... Weight member, 28... Dust separation drum, 29... String member, 30 ...Support roller, 30A...Large diameter part, 30B...Small diameter part, 30C...Shaft, 31...Inverted V-shaped angle fluctuation prevention means, 31A...Pin member, 31B...String member, 32...Motor, 33A...Water wheel, 33B ... Rotating shaft, 33C... Bearing, 33D... Rotating power mechanism, 33E... First pulley, 33F... Motor, 33G... Rotating shaft of motor, 33H... Second pulley, 33J... Timing belt, 34... Floating member, 35, 37 ... Blue-green algae colony, 36... Suction nozzle, 36A... Suction port, 38... Discharge nozzle, 38A... Discharge port, 40... Schema, 42... Filter, 44... Flat part of garbage separation drum, 46... Side plate of garbage separation drum, 48 ... Side plate inlet, 50, 52... Pulley, 54... Timing belt, 56... Cleaning nozzle, 58... Branch piping, 60... Deaeration tank, 62... Casing, 64... Impeller, 64A... Vane, 64B... Shrout, 66 ... Impeller chamber, 68 ... Frame, 70 ... Pump inlet, 72 ... Discharge part, 74 ... Pump outlet, 76 ... Motor, 76A ... Rotating shaft, 78 ... Partition wall, 80 ... Communication port of partition wall, 82 ... Suction port, 84...Discharge gap

Claims (10)

In an algae removal device equipped with an algae collection means for collecting algae floating in the surface water of a closed water area such as a swamp or pond ,
The algae collecting means includes:
A plurality of first rod-shaped members capable of floating in the surface water of the closed water area are arranged radially to form an inverted V-shape in which the inlet through which the floating algae flows has a diameter larger than that of the outlet. An algae collection section with multiple collection channels formed in a radial pattern;
A plurality of second rod-shaped members capable of floating in the surface water of the closed water area are arranged continuously and parallel to the outlet ports of the plurality of collection waterways to collect algae in the plurality of collection waterways. an algae guiding section forming a plurality of guiding waterways that guide the algae to one of the plurality of collecting waterways;
At least a connecting and fixing member that connects and fixes the plurality of first rod-like members and the plurality of second rod-like members ,
The algae collecting means includes:
a sheet-like member suspended from the first rod-like member and having a width substantially equal to that of the first rod-like member;
An algae removal device further comprising: a weight member that suspends the sheet-like member into the surface water . The algae removal device according to claim 1, wherein the one collection waterway is provided with an algae collection means for collecting the algae collected in the plurality of collection waterways. The algae removal device according to claim 1 or 2, wherein the plurality of collection waterways are four waterways, and the four first rod-shaped members are arranged radially at 90° intervals. The algae removal device according to any one of claims 1 to 3, wherein the first rod-shaped member and the second rod-shaped member are PVC pipes whose ends are watertight. The algae removal device according to any one of claims 1 to 4, wherein the first rod-shaped member of the collection waterway is expandable and retractable by a nested structure. The algae collecting means includes:
further comprising an inverted V-shaped angle variation prevention means for preventing variation in the inverted V-shaped angle of the plurality of collection waterways;
The inverted V-shaped angle fluctuation prevention means is
pin members each erected at the position of the inlet of the plurality of first rod-shaped members forming the collection waterway;
The algae removal device according to any one of claims 1 to 5 , further comprising a string-like member that connects adjacent pin members of the pin member under tension. 3. The algae removal device according to claim 2, wherein the plurality of guiding channels are provided with water flow generating means for generating a water flow in the surface water of the guiding channels from the collecting channel toward the algae collecting means. The algae removal device according to claim 2, wherein the algae collecting means includes a mechanism for separating garbage in the closed water area collected together with the algae by the algae collecting means and selectively collecting the algae. . The algae collection means includes:
a gate-shaped device frame through which the surface water containing the collected algae can flow;
Suction piping is disposed horizontally in the apparatus frame perpendicular to the flow direction of the surface water, and has a filter for separating dust formed on its peripheral surface, and a suction piping that suctions and takes in floating algae together with the surface water on its side surface. a cylindrical dust separation drum having one end and an inlet opening for introducing one end of a discharge pipe for discharging water for washing the filter;
a total of six support rollers that are rotatably supported by the device frame in a cantilevered manner and support each of the peripheral surfaces of both ends of the dust separation drum at three points;
Rotational power means for applying rotational power to at least one of the six support rollers to rotate the dust separation drum;
a floating member fixed to the device frame and floating the device frame so that a lower part of the trash separation drum is immersed in the surface water;
a suction nozzle provided in the dust separation drum, supported in communication with the suction piping, and formed such that a slot-shaped suction port that is long in the axial direction of the dust separation drum is located in the surface water; ,
A slot-shaped discharge port provided in the dust separation drum, supported in communication with the discharge pipe, and elongated in the axial direction of the dust separation drum is formed so as to be located above the surface of the surface water. a discharge nozzle;
The algae removal device according to claim 2, further comprising a plurality of plate-shaped schemas protruding from the outer surface of the dust separation drum and long in the axial direction of the dust separation drum. The algae removal device according to claim 2;
An algae destruction means having a multi-stage spiral pump structure for destroying algae collected by the algae collection means of the algae removal device and then collected by the algae collection means.