JP6528327B2 - Floating algae collection device and floating algae processing system - Google Patents

Description

  The present invention relates to a floating algae collecting apparatus and a floating algae processing system.

  In recent years, due to industrial development and population increase, nutrient concentrations of phosphorus and nitrogen in water increase in closed waters such as lakes, ponds, rivers, and closed waters, making closed waters prone to eutrophication . As a result, a large amount of floating algae, which are phytoplankton called blue-green algae and red tides, etc., are often generated, and the phenomenon that water becomes cloudy in green and red is often seen.

  If nutrients can be quickly removed from the eutrophicated water, it is possible to purify the water with aquatic plants or moderate phytoplankton. However, it is difficult to quickly remove nutrients dissolved in water, and a large amount of floating algae such as blue-green algae and red tides are easily generated.

  If floating algae such as blue-green algae and red tide are left standing, the oxygen concentration in the water area decreases and the fish may die, causing damage such as offensive odor to the tap water that uses water from the waterside or the water area. . For this reason, it is necessary to remove these floating algae in the water while improving the cause of the eutrophication of the closed water area.

  For example, blue-green algae are relatively spherical cyanobacteria (microcystis of several microns: mainly composed of Microcystis), and are suspended in surface water several centimeters below the water surface by intracellular gas vesicles. Then, when a large amount of blue-green algae is generated, colonies of the blue-green algae which have a three-dimensional structure of several tens to several hundreds of micrometers are matted to cover the water surface. A colony of blue-green algae is a collection of several hundred or more cells with a certain regularity. Examples of methods for treating such a group of blue-green algae include Patent Document 1 and Patent Document 2.

  In Patent Document 1, water containing a group of algae collected by an intake pump is passed through an ultrasonic irradiator to increase the specific gravity of the algae, and then dewatered using a centrifugal concentrator and a centrifugal dehydrator. A method has been proposed for efficiently collecting the algae from closed water areas by converting it into solid (ultrasonic method).

  Further, in Patent Document 2, water containing clumped green algae sucked by a water intake pump is oppositely jetted from both ends of the cylinder to make the clump of green algae finely divided by colliding water in the cylinder. It has been proposed (opposite injection method). In addition, Patent Document 2 proposes that the algal gas vesicles are destroyed to facilitate sedimentation, and then returned to the original closed water area. If the colony structure of the algae is finely divided, and if the gas vesicles are destroyed and easily sedimented and returned to the closed water area, predation by zooplankton present in the closed water area is promoted and the growth of the green algae in the closed water area is It can be suppressed.

JP-A-8-33888 JP, 2006-238703, A

However, the method of Patent Document 1 has a problem that the post-treatment such as incineration has to be performed because the collected water-bloom becomes industrial waste, and the treatment cost becomes high.
In addition, the method of Patent Document 2 does not become industrial waste because the treated water-bloom is returned to the closed water area, but the effect of the dividing treatment for finely dividing the colony-shaped blue-green algae and the destruction treatment for breaking the gas vesicles is sufficient. The problem is that you can not say If division treatment and destruction treatment of the blue-green algae are not sufficient and untreated blue-green algae remain, the effect of suppressing the growth of the blue-green algae in the closed water area is reduced.

The improvement of the division processing effect and the destruction processing effect is important not only in the blue algae but also in the processing of floating algae such as red tide.
As a further problem, in closed water areas, in addition to planktonic algae such as blue-green algae and the like, debris such as tree ends, fallen leaves, pieces of vinyl and the like are suspended, and it is difficult to collect only planktonic algae such as blue-green algae. Collecting rubbish together not only reduces the processing ability of floating algae such as blue-green algae but also causes damage to equipment such as a pump, an ultrasonic irradiator, and a jet cylinder.

  Although it is possible to prevent the collection of dust by providing a filter in the intake pump, the dust adhering to the filter must be frequently removed to prevent the filter from being clogged, which makes maintenance difficult.

  The present invention has been made in view of such circumstances, and it is possible to selectively collect only floating algae such as blue-green algae and the like, and a floating algae collecting device which requires almost no maintenance and a floating algae collecting device which requires almost no maintenance It is an object of the present invention to provide a floating algae treatment system provided with a floating algae destruction device excellent in fragmentation treatment effect and destruction treatment effect.

  The floating algae collecting apparatus according to the present invention is a floating algae collecting apparatus for collecting floating algae floating in surface water to achieve the object, and is a portal-type device frame in which the surface water containing the floating algae can flow And a filter for dust separation is formed on a circumferential surface of the apparatus frame, the filter being separated from the surface water, and the floating algae are sucked along with the surface water and taken in along the side surface of the apparatus frame. A cylindrical dust separation drum having an opening for introducing one end of a suction pipe and an end of a discharge pipe for discharging water for washing the filter into the interior (that is, inside the dust separation drum); Is rotatably supported at one end and supports the peripheral surfaces of both ends of the dust separating drum at three points, and a total of six supporting rollers and at least one of the six supporting rollers are provided with rotational power. A rotating power means for rotating the dust separating drum, a floating member fixed to the device frame, and a lower part of the dust separating drum for floating the device frame so as to be immersed in the surface water; A suction nozzle supported in communication with the suction pipe and having a slot-shaped suction port long in the axial direction of the dust separation drum and provided in the surface water; and provided in the dust separation drum A discharge nozzle supported in communication with the discharge pipe and formed so that a slot-shaped discharge port long in the axial direction of the dust separation drum is located on the surface of the surface water, and the dust separation A plurality of sheets are provided in a state of being projected on the outer surface of the drum, and a plate-shaped schemat long in the axial center direction of the dust separating drum is provided.

Here, "surface water can flow" means that surface water flows without stagnation.
According to the present invention, the floating algae collecting apparatus is floated in a closed water area where a large amount of floating algae such as water blooms such as lakes, ponds, rivers, and closed water areas are generated, so that the lower part of the garbage separation drum is immersed in surface water. . As a result, the suction port of the suction nozzle provided in the dust separation drum is immersed in the surface water.

  Then, the dust separation drum is rotated and a suction force is applied to the suction pipe. A plurality of schemats projected on the outer surface of the garbage separation drum by the rotation of the garbage separation drum scrape the floating algae floating around the floating algae collection device, and the garbage separation drum from the front gate side of the portal type device frame Form a flow of surface water that passes through the lower part of the and flows to the gate side.

  By the flow of the surface water, the floating algae scraped by the schema passes through the filter of the dust separation drum together with the surface water and is 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 of the garbage separation drum, and carried on the surface water flow to return from the rear face of the device frame to the closed water area.

In addition, since the water is discharged from the discharge nozzle onto the inner surface of the filter of the dust separation drum to automatically clean the filter, the filter is not easily clogged. Further, the apparatus frame is formed in a portal shape, and the peripheral surfaces of the both ends of the dust separation drum are supported at three points by six support rollers rotatably supported in a cantilever manner on the apparatus frame. Therefore, since the flow of surface water flowing from the front side of the portal-type device frame to the rear side through the lower part of the dust separation drum is not disturbed by the device frame or the support roller, floating algae are in the vicinity of the trash separation drum There is no stagnation.
Thereby, it is possible to selectively collect only floating algae such as blue-green algae and to provide a floating algae collecting apparatus which requires almost no maintenance.

  In the floating algae collection device of the present invention, it is preferable that an opening area of the slot shape of the suction port is larger than a square plate area of the schema. This makes it easy to attract floating algae collected by the schema into the suction nozzle.

  In the floating algae collecting apparatus of the present invention, it is preferable that a washing nozzle for washing the outer surface of the filter is provided outside the dust separation drum, and the washing nozzle is communicated in the middle of the discharge piping via a branch piping. . This allows the cleaning nozzle to clean the filter outer surface of the dust separation drum, thereby eliminating the need for further maintenance. In addition, since water supplied to the cleaning nozzle and the discharge nozzle can be shared by the discharge piping, the equipment can be simplified.

  In order to achieve the purpose of the floating algae treatment system of the present invention, a multistage connection is provided between the floating algae collection device and a pump inlet connected to the other end of the suction piping and a pump outlet connected to the other end of the discharge piping. A floating algae destruction apparatus having a spiral pump structure, and pressure adjusting means for adjusting the discharge pressure of the floating algae destruction apparatus are provided.

According to the floating algae treatment system of the present invention, by providing the above-described floating algae collecting apparatus, it is possible to selectively collect only floating algae such as blue-green algae, and almost no maintenance is required. Moreover, the effect of the division | segmentation process and the destruction process of floating algae can be remarkably improved by providing the floating algae destruction apparatus of a multistage swirl pump structure.
Thus, it is possible to provide a floating algae treatment system comprising a floating algae collecting device that requires almost no maintenance and a floating algae destruction device that is excellent in the division processing effect and the destruction processing effect.

  In the floating algae treatment system of the present invention, preferably, the multistage centrifugal pump has four or more stages. It is because remarkable division processing effect and destruction processing effect are exhibited in four or more stages.

  In the floating algae treatment system of the present invention, it is preferable to provide a degassing means for degassing air bubbles in the surface layer water sucked by the suction pipe in the middle of the suction pipe. If air bubbles are mixed in the surface water to be taken into the floating algae destruction apparatus having a multistage centrifugal pump structure, the pressure in the floating algae destruction apparatus is lowered, and the division processing effect and the destruction processing effect can be easily reduced.

  In the floating algae treatment system of the present invention, the multistage swirl pump structure is provided with a closed type impeller, and the width of the discharge gap of the closed type impeller is 4 mm to 10 mm, and the garbage separation drum of the floating algae collection device Preferably, the filter has a smaller opening than the discharge gap.

  The discharge gap of the multistage swirl pump structure is very narrow, 4 mm to 10 mm, and it is easy to cause clogging, but clogging is prevented by making the opening of the filter of the dust separation drum of the floating algae collecting device smaller than the discharge gap. it can.

  In the floating algae treatment system of the present invention, preferably, the floating algae destruction device is mounted on the device frame to be integrated. This not only makes the floating algae treatment system compact, but also facilitates handling such as transportation.

According to the floating algae collecting apparatus of the present invention, it is possible to selectively collect only floating algae such as blue-green algae and to provide a floating algae collecting apparatus which requires almost no maintenance.
Further, according to the floating algae treatment system of the present invention, it is possible to provide a floating algae treatment system comprising a floating algae collecting device which requires almost no maintenance and a floating algae destruction device excellent in divided treatment effect and destruction treatment effect. it can.

1 is a first embodiment of the floating algae treatment system of the present invention, and is an overall configuration diagram in which a floating algae collection device and a floating algae destruction device are separated. The perspective view of the floating algae collection device of the present invention A perspective view around the punching metal type garbage separation drum of the floating algae collecting device A perspective view around the wire mesh type garbage separation drum of the floating algae collection device Perspective view of suction nozzle of floating algae collection device Perspective view of the discharge nozzle of the floating algae collection device Explanatory drawing of the floating algae destruction device of multistage swirl pump structure Figure of the floating algae treatment system with degassing means It is a second embodiment of the floating algae treatment system of the present invention, and is a perspective view in which the floating algae collection device and the floating algae destruction device are integrated.

  Hereinafter, preferred embodiments of the floating algae collecting apparatus and the floating algae treatment system of the present invention will be described according to the attached drawings.

  The invention is illustrated by the following preferred embodiments. Changes can be made in a number of ways without departing from the scope of the present invention, and other embodiments than the present embodiment can be used. Therefore, all the modifications within the scope of the present invention are included in the claims.

Here, in the drawings, portions indicated by the same symbols are similar elements having similar functions. Moreover, in this specification, when expressing a numerical range using "-", the numerical value of the upper limit shown by "-" and a lower limit shall also be included in a numerical range.
[First embodiment of the floating algae treatment system]

  FIG. 1 is an entire configuration diagram of a first embodiment of the floating algae treatment system 10, in which the floating algae collection device 12 and the floating algae destruction device 14 are separately configured. Moreover, while demonstrating below with the example of blue-green algae as an example of a floating algae, surface water containing blue-green algae will be hereafter called "blue-water containing water."

  As shown in FIG. 1, the floating algae treatment system 10 mainly suspends the floating algae collection device 12 for collecting the blue-green algae floating in surface water, and breaks up the collected blue-green algae colony and destroys the gas vesicles of the cells. It is comprised by the algae destruction apparatus 14 and the pressure adjustment means 16 which adjusts the pressure of the floating algae destruction apparatus 14.

  The floating algae collection device 12 is disposed in the closed water area 15 where a large amount of water blooms such as lakes, ponds, rivers, and closed water areas occur, and the floating algae destruction device 14 is disposed on the land 18. And the floating algae collection device 12 and the floating algae destruction device 14 are connected by the suction piping 20 and the discharge piping 22. Further, the pressure adjustment means 16 is provided in the discharge pipe 22, and the pressure gauge 24 is provided between the pressure adjustment means 16 and the floating algae destruction device 14.

  (Floating algae collection device)

  FIG. 2 is a perspective view of the floating algae collection device 12.

  As shown in FIG. 2, the floating algae collecting apparatus 12 mainly comprises an apparatus frame 26, a dust separation drum 28, and a plurality of support rollers 30, 30... Rotatably supporting the dust separation drum 28 on the apparatus frame 26. A motor 32 (rotational power means) for rotating the dust separation drum 28, a floating member 34 for floating the apparatus frame 26, a suction nozzle 36, a discharge nozzle 38, and a plurality of schemata 40, 40. .

  The device frame 26 is formed in a gate-like shape through which blue-water-containing water can flow. That is, it has a frame-like frame structure in which the upper ends of a pair of square leg frames 26A and 26A erected opposite to each other are connected by a square upper surface frame 26B. The portal-type device frame 26 forms a water channel that can flow from the front gate side A (the front surface side in FIG. 2) to the rear gate side B (the rear surface side in FIG. 2) of the device frame 26 without stagnation. Ru.

  The material of the device frame 26 is not particularly limited as long as the material is not easily corroded by water, but stainless steel or hard resin can be suitably used. The device frame 26 is not limited to the above-described portal shape, as long as the device frame 26 can be circulated without stagnating surface water.

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

  Further, as shown in FIG. 3 and FIG. 4, the filter 42 is formed on the peripheral surface of the dust separating drum 28, and the flat portion 44 for contacting the support roller 30 is formed on both ends of the peripheral surface. Furthermore, a side plate 46 is provided on the side surface of the dust separation drum 28, and the side plate 46 is a discharge pipe 22 for discharging water for washing one end portion of the suction pipe 20 and the filter 42 by sucking and collecting the algae together with surface water. An inlet port 48 is opened to guide one end of the lower end portion of the dust separation drum 28 into the dust separation drum 28.

  The dust separation drum 28 of FIG. 3 is formed by forming the filter 42 by punching metal, and the dust separation drum 28 of FIG. 4 is formed by forming the filter 42 by wire mesh. The opening (hole diameter D) of the punching metal and the wire mesh is preferably in the range of 2 mm to 5 mm. As described in the prior art, the colony of water bloom is on a scale of several tens to several hundreds of micrometers, and if the opening of the filter 42 is 2 mm or more, the colony water bloom in the water containing water bloom can pass through the filter 42 If it is 5 mm or less, dust and the like in the water-bloom-containing water can be prevented from passing through the filter 42. Further, although details will be described later, if the mesh size of the filter 42 is 5 mm or less, the impeller of the floating algae destruction device 14 is not clogged.

  Further, as shown in FIG. 2, the dust separating drum 28 is a dust by a total of six supporting rollers 30 which are supported in a cantilever manner so as to be rotatably supported by a pair of opposing leg frames 26A and 26A of the apparatus frame 26. The peripheral surface (flat portion 44) of each end of the separation drum 28 is supported at three points.

  Of the three support rollers 30 that support three points, two support rollers 30 support the lower position of the end circumferential surface of the dust separation drum 28 at the same horizontal level, and the remaining support rollers 30 are dust separation drums. Support the upper end position of the end surface of 28. It is preferable that the shape connecting the three support rollers 30 be an equilateral triangle. In FIG. 2, the support roller 30 supporting the upper end position of the end circumferential surface of the dust separation drum 28 is supported by a flange 26 </ b> C protruding downward from the device frame 26.

  Further, the support roller 30 is formed in a step structure with a disk-shaped large diameter portion 30A on the apparatus frame 26 side and a cylindrical small diameter portion 30B continuous with the large diameter portion 30A. 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. As described above, the support roller 30 has a stepped structure, thereby preventing the dust separation drum 28 from being displaced in the axial direction.

  The support roller 30 has a roller portion provided on a shaft 30C cantilevered on the apparatus frame 26 via a bearing (not shown), or the shaft 30C of the support roller 30 is fixed to a bearing fixed on the apparatus frame 26. It may be any of the supported modes. In this case, it is preferable to use a resin bearing suitable for rotation in water.

  Further, the motor 32 is installed on a flange 26D which protrudes horizontally from the upper surface frame 26B, and a pulley 50 is provided on a rotation shaft 32A of the motor 32. On the other hand, a pulley 52 is also provided on one of the pair of support rollers 30 for supporting the upper end position of the dust separation drum 28 for rotational driving. Although FIG. 2 illustrates the case where the large diameter portion 30A of the support roller 30 is also used as the pulley 52, the pulley 52 may be separately provided.

  Then, 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 support roller 30 for rotational drive rotates via the timing belt 54, and the dust separation drum 28 further rotates. In this case, the peripheral surface of the small diameter portion 30B of the support roller 30 for rotation drive and the end portion of the dust separation drum 28 are flat so that the rotational power of the support roller 30 for rotation drive is easily transmitted to the dust separation drum 28. The circumferential surface of the portion 44 may be made rubbery so as not to slip, or a plurality of stripe 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 member 34 is fixed to the left and right leg frames 26A of the device frame 26, and floats the device frame 26 so that the lower part of the dust separating drum 28 is immersed in surface water. The floating member 34 is not particularly limited, and may be polystyrene foam, a hollow resin cylinder (for example, a polyvinyl chloride pipe) whose both ends are closed, or the like.

  As shown in FIGS. 2 and 5, the suction nozzle 36 is provided in the dust separation drum 28 and supported in communication with the suction pipe 20. Further, the suction nozzle 36 is formed such that a slot-shaped suction port 36A long in the axial direction of the dust separation drum 28 is immersed in surface water (see FIG. 1).

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

  In addition, the suction nozzle 36 is disposed obliquely downward toward the front side A of the device frame 26 (see FIG. 2). Furthermore, in the suction nozzle 36, the suction port 36A is formed in a trumpet-like shape larger than the communication port (not shown) communicated with the suction pipe 20 (see FIG. 5). The opening area of the slot shape of the suction port 36A is preferably larger than the rectangular area of the schema 40. As a result, water-containing waterweed flowing from the front side A to the rear side B of the device frame 26 is easily taken in from the suction port 36 A of the suction nozzle 36.

  As shown in FIGS. 2 and 6, the discharge nozzle 38 is provided in the dust separation drum 28 and supported by the discharge pipe 22 in a communicating state. Further, the discharge nozzle 38 is formed such that a slot-shaped discharge port 38A which is long in the axial direction of the dust separation drum 28 is exposed on the surface of surface water (see FIG. 1). Further, the discharge nozzle 38 is formed in a reverse trumpet-like shape in which the discharge port 38A is smaller than the communication port (not shown) communicated with the discharge pipe 22 (see FIG. 6). As a result, the washing water can be vigorously sprayed from the discharge port 38A of the discharge nozzle 38 onto the inner surface of the filter 42 of the dust separation drum 28, and the washing effect of the filter 42 can be enhanced.

  If the cleaning nozzle 56 for cleaning the outer surface of the filter 42 is provided outside the dust separation drum 28 as shown in FIG. 1, the cleaning effect of the filter 42 can be further enhanced. In this case, it is preferable that the cleaning nozzle 56 be in communication with the discharge pipe 22 through the branch pipe 58. Thereby, it is not necessary to provide piping separately for washing water.

  A plurality of schemats 40 are provided in a state of being projected on the outer surface of the dust separation drum 28, and are formed in a square plate shape long in the axial center direction of the dust separation drum 28. Thus, the schema 40 rotates with the rotation of the dust separation drum 28 and scrapes the blue-green algae floating in the closed water area 15. The number of schemas 40 is not particularly limited, but it is preferable that the number is four or more at equal intervals in the circumferential direction of the dust separation drum 28.

  (Floating algae destruction device)

  (A) of FIG. 7 is the whole block diagram of the floating algae destruction apparatus 14 of a multistage spiral pump structure, (B) is sectional drawing to which a part of inside of a multistage spiral pump structure was expanded.

  The floating algae destruction apparatus 14 having a multistage centrifugal pump structure is configured such that a plurality of impeller chambers 66 provided with impellers 64 (impellers) are formed in a casing 62 so that the pressure is higher than in the case of one stage. The floating algae destruction apparatus 14 is installed on a stand 68 installed on the land 18.

  As shown in FIG. 7A, the pump inlet 70 is opened at the side center of one end of the cylindrical casing 62, and the periphery of the discharge part 72 is formed at the other end and the discharge chamber is formed inside. The pump outlet 74 is opened to 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.

  Also, a motor 76 that rotates the impeller 64 is disposed adjacent to the discharge portion 72. The rotation shaft 76A of the motor 76 is mounted through the casing 62, and a shaft seal (not shown) is provided so that water does not leak from the gap between the casing 62 and the rotating rotation shaft 76A. In addition, illustration is abbreviate | omitted about the bearing which supports 76 A of rotating shafts.

Further, the inside of the casing 62 is divided into four impeller chambers 66 by three partition walls 78, and is formed into a four-stage multistage spiral pump structure. Although FIG. 7 illustrates an example of a four-stage multistage centrifugal pump structure, the number of stages is preferably in the range of four to ten. In addition, it is preferable that the pressure has a capability of 0.5 MPa (5 kgf / cm ² ) or more.

  Moreover, the communicating port 80 is opened by the center part of the partition wall 78 of 3 sheets, respectively. The impellers 64 are disposed in the four impeller chambers 66 respectively, and the impellers 64 are supported through the three communication ports 80 by the rotation shaft 76A of the motor 76 disposed. The diameter of the communication port 80 formed in the partition wall 78 is larger than the diameter of the rotation shaft 76A of the motor 76, and the four impeller chambers 66 are in communication via the communication port 80.

  As shown in FIG. 7B, the impeller 64 covers both sides of the plurality of blades 64A with two shrouds 64B (side plates), and the center of the shroud at the pump inlet 70 side of the two shrouds 64B. There is provided a closed type impeller 64 in which the suction port 82 is formed and the discharge gap 84 is formed in the peripheral portion. The width W of the discharge gap 84 of the impeller 64 is preferably 4 mm to 10 mm, and more preferably 5 mm to 7 mm.

  When the motor 76 is driven to rotate the four impellers 64 at a high speed, the outer peripheral portion of the impeller 64 becomes high in pressure due to the action of the centrifugal force, and the central portion of the impeller 64 becomes low in pressure because almost no centrifugal force acts. 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. The water-sucking water is sucked from the suction nozzle 36 of the floating algae collecting device 12 by this suction force.

Further, as shown in FIG. 1, a pressure adjusting 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 adjusting means 16. The pressure adjusting means 16 is to increase the discharge pressure of the multistage centrifugal pump structure by squeezing the flow path of the discharge pipe 22 and the discharge pressure is 0.5 MPa (5 kgf / cm ² ) or more and 1.0 MPa (10 kgf / cm) ² ) It is preferable to adjust to the following.

  The closed type impeller 64 can efficiently apply centrifugal force to the liquid, but the discharge gap 84 of the impeller 64 is narrow as described above, and foreign substances such as blue-green algae in water containing blue-green algae are easily clogged. Therefore, it is preferable to set the opening of the filter 42 of the dust separation drum 28 of the floating algae collecting device 12 smaller than the width W of the discharge gap 84 of the impeller 64.

  Next, a method of treating algae by the floating algae treatment system 10 configured as described above will be described.

  As shown in FIG. 1, floating algae collecting apparatus 12 is floated on closed water area 15 where a large amount of water blooms such as lakes, ponds, rivers, closed water areas occur, so that the lower part of refuse separation drum 28 is immersed in surface water. . Thereby, the suction port 36A of the suction nozzle 36 provided in the dust separation drum 28 is immersed in the surface water. However, the inlet 48 formed in the side plate 46 of the dust separation drum 28 is prevented from being immersed in surface water.

  Then, the motor 32 of the floating algae collecting device 12 is driven to rotate the dust separating drum 28 in the arrow direction X in FIG. As a result, a plurality of schemats 40 projected on the outer surface of the trash separating drum 28 scrape the blue algae floating around the floating algae collecting device 12 and the trash separating drum from the front side A of the portal type device frame 26 A flow of water-bloom-containing water is formed on the posterior side B through the lower part of 28.

  In this case, the apparatus frame 26 has a gate-like shape that allows water-containing water to flow from the front side A to the rear side B, and the dust separation drum is further supported by six support rollers 30 rotatably supported on the device frame 26. Since the peripheral surfaces of both end portions of 28 are supported at three points, it is possible to prevent floating algae and dust from being caught on the device frame 26 and the support roller 30, and stagnating the flow of water-containing waterweed. As a result, not only can the green algae contained in the green algae-containing water be efficiently suctioned from the suction port 36A of the suction nozzle 36, but maintenance is facilitated because the dust does not stay.

  Further, by supporting the peripheral surfaces of both ends of the dust separation drum 28 at three points by six support rollers 30 rotatably supported in a cantilever manner on the apparatus frame 26, the dust separation drum 28 can be stably supported. .

  Next, the motor 76 of the floating algae destruction apparatus 14 having a multistage centrifugal pump structure is driven to rotate the four impellers 64 at a high speed. As a result, a suction force is generated at the pump inlet 70 of the casing 62 of the floating algae destruction device 14, so that the suction force is applied to the suction nozzle 36 of the floating algae collection device 12 through the suction piping 20. Therefore, the water-bloom-containing water collected by the schema 40 passes through the filter 42 of the dust separation drum 28 and is taken into the suction piping 20 from the suction port 36A of the suction nozzle 36 and flows through the suction piping 20 to the floating algae destruction device 14 It is delivered.

  On the other hand, the rubbish scraped together with the floating algae in the schema 40 is separated by the filter 42 of the dust separating drum 28, and rides on the surface water flow flowing from the front side A to the rear side B of the portal device frame 26. The back side B of the device frame 26 returns to the closed water area 15.

  Thereby, it is possible to selectively collect only floating algae such as blue-green algae, and it is possible to provide a floating algae collecting device 12 which requires almost no maintenance.

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

  As a result, the green algae in the water containing the green algae vigorously collides with the inner surface of the casing 62, so that the green algae colony is finely divided and the gas vesicles of the green algae cells are broken. Furthermore, by applying a constant high pressure (0.5 MPa or more) in the casing 62 of the floating algae destruction apparatus 14, it is possible to efficiently destroy the gas vacuoles of the blue-green algae cells.

  In this case, since the pressure of the floating algae destruction apparatus 14 suitable for the division processing and the destruction processing differs depending on the type of floating algae, it is preferable to adjust by the pressure adjusting means 16.

  The blue-water-containing water discharged from the discharge gap 84 of the first stage impeller 64 flows from the communication port 80 of the first stage partition wall 78 into the second stage impeller chamber 66 at a higher flow rate and flows into the second stage. The impeller 64 performs the same dividing and breaking process as the first stage impeller 64. Similarly, the water-bloom-containing water is discharged to the discharge piping 22 from the pump outlet 74 of the discharge part 72 after the division processing and the destruction processing are further repeated by the impellers 64 of the third and fourth stages.

  As described above, in the floating algae destruction apparatus 14 having a multistage swirl pump structure, the flow velocity of the water-bloom-containing water increases as the number of stages of the impeller 64 increases, and the water-bloom-containing water accelerates from the discharge gap 84 of the impeller 64 Two destructive actions can be performed in a multistage manner: collisional destruction, which often collides to destroy green algae, and pressure destruction, which applies a constant high pressure (0.5 MPa or more) in the casing 62 and destroys green algae. As a result, since it is possible to efficiently divide and destroy the algae blooms in water-bloom-containing water, the division processing effect of water-bloom and the algae-pellet destruction device of the ultrasonic method and the counter-injection method described in the prior art The destructive treatment effect can be significantly improved.

  By the way, when all the blue-green algae contained in water-bloom-containing water is divided and destroyed 100%, about 80% is the limit about the divisional processing effect and destruction treatment effect of the green algae of the conventional floating algae destruction device However, the floating algae destruction apparatus 14 in the present invention can be about 90% or more. That is, by treating the algae-containing water with the planktonic algae destroying device 14 in the present invention, untreated algae can be substantially eliminated in the division treatment and the destruction treatment. Thereby, even when the algae-containing water treated with the floating algae treatment system 10 of the present invention is returned to the closed water area 15, the growth of algae can be reliably suppressed.

  When air bubbles are mixed in the water-bloom-containing water in the division treatment and destruction treatment of the blue algae by the floating algae destruction device 14 described above, a pressure drop occurs in the floating algae destruction device 14 and the effects of the division treatment and the destruction treatment are reduced. easy.

  As a countermeasure, as shown in FIG. 8, it is preferable to provide a degassing tank 60 (a degassing means) between the floating algae destruction apparatus 14 and the suction pipe 20. That is, air bubbles in the water-bloom-containing water are degassed by allowing the water-bloom-containing water sucked by the suction nozzle 36 of the floating algae collection device 12 to flow into the degassing tank 60 for storage. In this case, since the suction force generated by the floating algae destruction apparatus 14 can not 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 floating algae destruction apparatus 14 is disposed vertically and installed so that the pump inlet 70 of the casing 62 is located near the bottom of the algal-containing water stored in the deaeration tank 60. Thereby, since the air bubbles in the water-bloom-containing water taken into the floating algae destruction apparatus 14 can be eliminated, the effects of the dividing process and the breaking process are not reduced.

  Although the degassing tank 60 is provided as the degassing means in FIG. 8, a degassing device (not shown) having a vacuum pump may be disposed in the middle of the suction pipe 20. .

  In addition, treated water after division processing and destruction treatment are performed by the floating algae destruction apparatus 14 will be referred to as water-bloom-containing treated water.

Next, the algae-containing treated water discharged from the floating algae destruction apparatus 14 to the discharge pipe 22 is vigorously discharged toward the inner surface of the dust separation drum 28 from the discharge port 38A of the discharge nozzle 38. As a result, even if dust such as a polyethylene bag is stuck on the surface of the dust separation drum 28, the water discharged from the inside of the dust separation drum 28 can blow off the stuck dust and peel it off from the filter 42. .
Further, by the branch piping 58 branched from the discharge piping 22, a part of the water-bloom-containing treated water flowing through the discharge piping 22 is vigorously discharged toward the outer surface of the filter 42 of the dust separation drum 28 from the cleaning nozzle 58. The discharge pressure having the cleaning ability of the filter 42 may be 0.1 MPa. Therefore, the pressure adjustment means 16 may be adjusted so that the pressure of the floating algae destruction apparatus 14 ensures 0.5 MPa or more, and the discharge pressure from the discharge nozzle 38 and the cleaning nozzle 58 becomes 0.1 MPa.

  As a result, the filter 42 of the dust separation drum 28 can be automatically cleaned with the water-containing treated water. In this case, since the algal bloom in the algal-containing treated water is finer than the algal colony (several tens to hundreds of μm scale) described in the prior art, the filter 42 is not clogged.

  Then, the dust removed from the filter 42 by the automatic cleaning returns from the rear gate side B of the device frame 26 to the closed water area 15 by the flow of surface water from the front gate side A to the rear gate side B of the portal type device frame 26 .

  Thereby, the floating algae treatment system 10 of the present invention provides the floating algae treatment system 10 which requires little maintenance of the floating algae collection device 12 and is excellent in the division processing effect and the destruction treatment effect of the floating algae destruction device 14 be able to.

  In addition, although not shown in the drawings, the rubbish separation drum 28 is hydraulically driven by water pressure by utilizing the fact that the water-bloom-containing treated water is vigorously discharged from the discharge port 38A of the discharge nozzle 38 toward the inner surface of the dust separation drum 28. A configuration that does not use the motor 32 is possible by rotating. That is, a plurality of blades of a water wheel are formed on the inner surface of the dust separation drum 28, and the waste 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.

  [Second embodiment of the floating algae treatment system]

  The floating algae treatment system 10 of FIG. 9 is a perspective view of a case where the floating algae destruction device 14 having a multistage swirl pump structure is mounted on the device frame 26 of the floating algae collection device 12 described above to be integrated. The members constituting the separate type floating algae treatment system 10 and the integrated floating algae treatment system 10 described above are the same, so the description of the components will be omitted.

  Further, in the integrated floating algae treatment system 10 of FIG. 9, the pressure gauge 24, the cleaning nozzle 56, and the degassing tank 60 (the degassing means) described in the separate type are not illustrated.

  Thus, by integrating the floating algae treatment system 10, not only the floating algae treatment system 10 can be made compact, but also handling such as transportation becomes easy. In the case of an integral type, a motor 32 for rotating the dust separation drum 28 of the floating algae collecting device 12 and a power supply device (not shown) of a motor 76 for rotating the impeller 64 of the floating algae destruction device 14 If mounted, it is possible to freely move the closed water area 15 such as a lake, a pond, a river, a closed sea area or the like to treat floating algae.

  In addition, although the example which processes blue algae with the above-mentioned floating algae processing system 10 was demonstrated, it is applicable similarly to a red tide.

  DESCRIPTION OF SYMBOLS 10 ... Floating algae processing system, 12 ... Floating algae collection apparatus, 14 ... Floating algae destruction apparatus, 15 ... Closed water area, 16 ... Pressure control means, 18 ... Land area, 20 ... Suction piping, 22 ... Discharge piping, 24 ... Pressure 26: Device frame 28: Garbage separation drum, 30: Support roller, 32: Motor, 34: Floating member, 36: Suction nozzle, 38: Discharge nozzle, 40: Schema, 42: Filter, 44: Garbage separation drum Flat portion 46, dust separation drum side plate, 48: side plate introduction port, 50, 52: pulley, 54: timing belt, 56: cleaning nozzle, 58: branch piping, 60: degassing tank, 62: casing, 64: impeller, 64A: blade, 64B: shroud, 66: impeller chamber, 68: frame, 70: pump inlet, 72: outlet, 74: pump outlet, 76: motor, 78 Partition wall, 80 ... partition wall communicating port, 82 ... inlet, 84 ... discharge gap

Claims (9)

A floating algae collecting apparatus for collecting floating algae floating in surface water, comprising:
A portal-type device frame through which the surface water containing the floating algae can flow;
A suction pipe which is disposed in a lateral direction orthogonal to the flow direction of the surface water in the device frame, and has a filter for dust separation formed on the circumferential surface and suctions the floating algae together with the surface water on the side. A cylindrical dust separating drum having an opening at one end thereof and an introduction port for introducing one end of a discharge pipe for discharging water for washing the filter into the inside;
A total of six support rollers rotatably supported on the device frame so as to be supported at three points on the circumferential surfaces of both ends of the dust separation drum;
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 the lower part of the dust separating drum is immersed in the surface water;
A suction nozzle provided in the dust separation drum, supported in communication with the suction pipe and formed so that a slot-shaped suction port 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 and supported in communication with the discharge pipe and elongated in the axial direction of the dust separation drum is formed on the surface of the surface water. A discharge nozzle,
A floating algae collecting apparatus comprising: a plurality of plates provided in a state of being projected on the outer surface of the dust separation drum; and a plate-like schemat that is long in the axial center direction of the dust separation drum.   The floating algae collecting apparatus according to claim 1, wherein an opening area of the slot shape of the suction port is larger than a square plate area of the schema.   The floating algae collecting apparatus according to claim 1 or 2, wherein a cleaning nozzle for cleaning the outer surface of the filter is provided on the outside of the dust separation drum and the cleaning nozzle is communicated to the middle of the discharge piping via a branch piping. . The floating algae collecting device according to any one of claims 1 to 3;
A floating algae destruction apparatus having a multistage swirl pump structure, wherein a pump inlet is connected to the other end of the suction pipe and a pump outlet is connected to the other end of the discharge pipe;
And a pressure control unit configured to control the discharge pressure of the floating algae destruction apparatus.   The floating algae treatment system according to claim 4, wherein the multistage centrifugal pump structure has four or more stages and ten or less stages.   The floating algae treatment system according to claim 4 or 5, further comprising a degassing means for degassing bubbles in the surface layer water sucked into the suction pipe in the middle of the suction pipe.   The multistage swirl pump structure is provided with a closed type impeller, and the width of the discharge gap of the closed type impeller is 4 mm to 10 mm, and the filter separation of the dust separation drum of the floating algae collecting device is the discharge gap The floating algae treatment system according to any one of claims 4 to 6, which is smaller.   The floating algae treatment system according to any one of claims 4 to 7, wherein the floating algae destruction device is mounted on a device frame of the floating algae collection device to be integrated. A floating algae collecting apparatus for collecting floating algae floating in surface water, comprising:
An apparatus frame through which the surface water containing the floating algae can flow;
A discharge pipe which is disposed in the device frame, has a filter for separating dusts formed on its circumferential surface, and suctions the floating algae together with surface water on one side to take in one end of a suction pipe and discharge water A cylindrical dust separating drum having an opening for introducing one end into the interior;
Rotating means for rotating the dust separating drum;
A floating member fixed to the device frame and floating the device frame so that the lower part of the dust separating drum is immersed in the surface water;
A suction nozzle provided in the dust separation drum, supported in communication with the suction pipe, and formed such that a suction port is located in the surface water;
A discharge nozzle provided in the dust separation drum and supported in communication with the discharge pipe;
A floating algae collecting device characterized by comprising.