JP5995188B2 - Static mixer and ballast water treatment apparatus having the same - Google Patents

Description

  The present invention relates to a static mixing device that mixes liquid, and a living organism that has this and diffuses and mixes a bactericide efficiently into seawater taken as ballast water loaded in a ship's ballast tank. Further, the present invention relates to a ballast water treatment apparatus for efficiently diffusing and mixing a bactericidal agent decomposing agent with the ballast water containing the bactericidal agent to decompose the bactericidal agent.

  2. Description of the Related Art As a device for adding and mixing an additive fluid to be mixed with an inflow fluid flowing in a pipeline, a static mixing device (static mixer) having no moving parts and a simple structure is known. Disinfect the ballast water discharged to disinfect and disperse the disinfectant remaining in the ballast water by adding a disinfectant to the seawater taken for the ballast water by sterilizing the ballast water of the ship, etc. The above-mentioned static mixing apparatus is suitable for adding and dispersing and mixing the agent decomposing agent.

<Static mixer>
The static mixing device is arranged in the middle of a pipe forming a fluid flow path, and is configured to diffuse and mix the added fluid that is mixed by generating disturbance in the flow of the flowed fluid. A static mixing device disclosed in Document 1 is known.

  The static mixing device of Patent Document 1 is formed as a plate-like member extending radially inward from the pipe inner wall of a pipe line, and includes a ring portion sandwiched between joints of the pipe line and two circumferential positions. A flap portion extending opposite to the diametrical direction, and an arcuate inner flange portion extending radially inward from the inner wall position of the pipe so as to connect the base portions of the two flap portions in the circumferential direction. A substantially 8-shaped opening formed by the contours of the flap portion and the inner flange portion is formed. This opening portion forms a narrow region between the tips of the flap portions. The opening portion forms a smooth inner edge of the opening portion by connecting the arcuate edge portion serving as the inner diameter of the flange portion and the radial edge portion of the flap portion with a curved line.

  Such a static mixing device of Patent Document 1 is arranged so as to be sandwiched between joints of the pipe in the middle of the pipe for the flowing fluid, and the added fluid to be mixed is the flow of the flowing fluid. It is injected and added into the flowing fluid at the position of the static mixing device in the direction or the position immediately before and after that.

  According to such a static mixing device of Patent Document 1, the inflow fluid flowing through the opening portion generates a Karman vortex on the wake side with respect to the flap portion, and is injected in a short range in the flow direction. The added fluid is actively diffused and mixed with the flow fluid. Therefore, it is advantageous when it is desired to extract the fluid in which the added fluid is sufficiently mixed from the pipe line at a downstream position close to the static mixing device. For example, in a ship or factory, the space for pipe installation is limited, and it is desirable that the distance from the static mixing device to the extraction position of the flowing fluid is short. This also means miniaturization of the static mixing device in the flow direction.

<Ballast water treatment equipment>
In general, a ship with an empty load or a small load is filled with seawater as ballast water at the time of unloading because of the necessity of ensuring the depth of submersion of the propeller and ensuring safe navigation when empty. Conversely, when loading, ballast water is discharged into the sea. By the way, when ballast water is taken and drained by a ship that reciprocates between a loading port and an unloading port in different environments, organisms such as bacteria and plankton contained in the ballast seawater are brought in. There are concerns about adverse effects on coastal ecosystems. Therefore, in February 2004, an international convention for the regulation and management of ship ballast water and sediment was adopted at an international conference on ship ballast water management, and the treatment of ballast water became mandatory.

According to the standard established by the International Maritime Organization (IMO) as a treatment standard for ballast water, the number of organisms (mainly zooplankton) of 50 μm or more contained in the ballast water discharged from the ship is less than 10 in 1 m ³ , The number of organisms (mainly phytoplankton) of 10 μm or more but less than 50 μm is less than 10 in 1 mL, the number of Vibrio cholerae is less than 1 cfu in 100 mL, the number of E. coli is less than 250 cfu in 100 mL, and the number of enterococci in 100 mL Is less than 100 cfu.

  In Patent Document 2 as a conventional technique of ballast water treatment technology, when seawater is taken in as ballast water, a filtration device that captures and removes aquatic organisms by filtering seawater, and sterilization that kills bacteria in the seawater A sterilizing agent supply device for supplying a sterilizing agent into the filtered seawater, and a cavitation is generated in the filtered water upon receiving the supply of the filtered water supplied with the sterilizing agent to diffuse the sterilizing agent in the filtered water and A ballast water treatment device has been proposed comprising a venturi device that damages or kills aquatic organisms.

US Pat. No. 5,839,828 JP 2007-144391 A

  However, in the static mixing device of Patent Document 1, the inner edge of the opening is formed with a smooth curve. Therefore, the shape of the inner flange that determines the shape of the inner edge and the shape of the flap form a curve that connects many arcs. It becomes complicated and increases the manufacturing cost of the static mixing device. Therefore, there is a demand for an inexpensive static mixer having a simpler shape. In addition, the static mixing device can be applied to the treatment of ship ballast water as described above. However, in applications where a bactericide is supplied to the seawater in ballast water treatment to diffuse and mix, There is a demand for an efficient static mixing device that can supply an additive fluid at a low concentration to the fluid, and can diffuse and mix in a shorter pipe distance, that is, in a shorter time than before, to obtain a uniform concentration. In the static mixing device of Patent Document 1, since the inner flange protrudes from the inner wall of the pipe, the flow area of the opening is reduced, and as a result, the flow rate of the inflowing fluid, and hence the mixing ability is reduced. Thus, a problem arises in performing diffusion and mixing in a short time.

  In addition, regarding the ballast water treatment device, it is necessary to complete the removal and sterilization processing of organisms when taking in the ballast water within the time of unloading from the ship. Since it is usually required to be performed, a mixing apparatus capable of diffusing and mixing a bactericide in a large amount of filtered water in a short time is desired. When a venturi pipe device is used as a mixing device as in the ballast water treatment device of Patent Document 2, it becomes a device in which a plurality of venturi pipes are arranged for mass processing, which becomes large and is installed in an engine room or the like of a ship. This leads to restrictions on the manufacturing cost and increased manufacturing costs.

  In view of such circumstances, the present invention provides a static mixing device that has a simpler shape and structure, is more efficient, is inexpensive, and has a high mixing capacity, and a more compact and inexpensive ballast water treatment device. Let it be an issue.

According to the present invention, the above-described problems are solved by a static mixing device configured as follows and a ballast water treatment device using the same.

<Static mixer>
In order to mix the added fluid added to the inflow fluid in the pipe with the inflow fluid, the static mixing device of the present invention is attached in the middle of the pipe and is radially inward at a plurality of circumferential positions on the inner wall surface of the pipe. And a mixing member formed with a flap portion extending in the direction.

  In such a static mixing device, according to the present invention, the mixing member is made as a plate member that expands in the radial direction, and extends from the ring portion in the radial inward direction at a plurality of positions in the circumferential direction. A flap portion and a fan-shaped region formed between adjacent flap portions in the circumferential direction has an opening portion that communicates with each other through a narrow region at the tube axis position, and the opening portion is formed in the fan-shaped region. The inner edge near the ring portion is characterized by forming the same arc portion as the inner diameter of the inner wall surface of the tube.

  In the present invention having such a configuration, the fan-shaped region of the opening formed in the mixing member has an inner edge near the ring portion having the same arc shape as the inner diameter of the inner wall surface of the tube. The arc shape and the radial edge of the flap portion do not need to be smoothly connected, the shape of the opening is simplified, and in addition, the fan-like area occupies the entire area up to the inner wall surface of the pipe in the radial direction. As a result, the flow area of the opening is increased, and the mixing capacity is improved. Moreover, since the inner wall surface of the pipe and the arc portion of the fan-shaped area of the opening form the same radius, that is, the same cylindrical surface, there is no resistance to the flow in the arc portion, and the flow capacity is also improved in this respect. .

  In the present invention, the flap portion may be formed in a plane perpendicular to the pipeline axis. In this way, the mixing member can be made as a perfectly flat plate member, and the shape is simplified in this respect, resulting in a reduction in manufacturing costs. In addition, since the mixing member is a completely flat plate member, when the nozzle for adding the additive fluid is provided, the nozzle is positioned upstream with respect to the mixing member in the flow direction of the flowing fluid, the downstream position, It is easy to provide at any position of the same position as the mixing member, or at a plurality of positions among the above positions. Further, since the mixing member is a completely flat plate member, the nozzle is provided at any position among the above positions, and the operation of flowing the flow fluid in one direction in the pipe and mixing it in the opposite direction. It is possible to perform the mixing operation, that is, to perform the mixing operation by switching the flow direction of the flowing fluid. As a result, when mixing different additive fluids, one mixing device can also be used, and the flow direction of the flow fluid and the position of the nozzle corresponding to the flow conditions and mixing conditions of the flow fluid The relationship can be adapted appropriately.

  In the present invention, the flap portion has a base portion connected to the ring portion and an end portion extending radially inward from the base portion to form a narrow region, and the end portion is directed radially inward to the downstream side of the inflow fluid. It can be inclined. By doing so, the fluid resistance at the end can be reduced.

  In the present invention, the mixing member may be provided with an annular portion in contact with the inner wall surface of the tube at a boundary position between the ring portion and the flap portion. By providing the annular portion, a bent portion is formed between the ring portion and the annular portion, and between the annular portion and the flap portion. Therefore, the strength of the mixing member is improved by the formation of the bent portion, and the fluid resistance is slightly increased. No deformation or damage at most. Moreover, since the annular portion is positioned so as to be in contact with the inner wall surface of the pipe, the flow area of the opening is not reduced.

In the present invention, the static mixing device further includes a nozzle for adding the additive fluid, and the nozzle is located upstream, downstream, and in the same position as the mixing member in the flow direction of the inflowing fluid. It is possible to be provided at at least one of the positions. The nozzle can be provided at a different position as a separate member from the mixing member, or can be integrated with the mixing member. Further, this nozzle is not particularly limited as long as the position of the discharge port of the added fluid is in the opening in the circumferential direction and the radial direction. Also, the number of nozzles can be set freely.

<Ballast water treatment equipment>
According to the present invention, a ballast water treatment device can be configured using the above-described static mixing device.

  First, a ballast water treatment device for taking ballast water is a filtration device that captures plankton by filtering the collected seawater, and kills plankton and bacteria present in the filtered water after filtration. A sterilizing agent supply device that supplies the sterilizing agent to the filtered water and a mixing device that diffuses and mixes the sterilizing agent into the filtered water, and the mixing device is configured as the static mixing device described above.

  Next, the ballast water discharge time treatment device for discharging the ballast water in the ballast tank is a disinfectant decomposer supply device that supplies a disinfectant decomposer to the ballast water in which the disinfectant from the ballast tank remains, And a mixing device that diffuses and mixes the disinfectant disinfectant into the ballast water, and the mixing device is a static mixing device as described above.

  Furthermore, a ballast water treatment apparatus capable of both ballast water intake treatment and ballast water discharge treatment includes a filtration device that captures plankton by filtering the collected seawater, and plankton that exists in the filtered water after filtration. And a bactericide supplying device that supplies the filtered water with a bactericidal agent that kills bacteria, a mixing device that diffuses and mixes the bactericide into the filtered water, and sends the filtered water after mixing to the ballast tank as ballast water A water feeding device, a bactericide decomposing agent supplying device for supplying a bactericide decomposing agent to the ballast water in which the bactericide from the ballast tank remains, and a mixing device for diffusing and mixing the bactericide decomposing agent in the ballast water. , By mixing the water supply to the ballast tank of filtered water and the drainage of ballast water from the ballast tank, the mixing device for the diffusion mixing of the bactericide and the diffusion supply of the bactericide decomposer Being adapted for alternately performed, constituted by the mixing device is a previously described static mixing device.

  As described above, the present invention greatly expands the opening formed in the mixing member of the static mixing device to a position coinciding with the pipe inner wall surface of the pipe line. There is no need to connect curves to create a smooth curved shape over the entire inner edge, making the shape simple and easy to process, and manufacturing at low cost. The flow rate can be transferred, and the processing can be performed for a short time. In addition, at that time, the inner edge of the opening portion near the ring portion forms the same level surface as the inner diameter of the tube, so that the fluid resistance is not increased. The flap portion may be formed in a plane perpendicular to the pipeline axis. In this way, the mixing member can be made as a perfectly flat plate member, and the shape is simplified in this respect, resulting in a reduction in manufacturing costs. In addition, since the mixing member is a completely flat plate member, when the nozzle for adding the additive fluid is provided, the nozzle is positioned upstream with respect to the mixing member in the flow direction of the flowing fluid, the downstream position, It is easy to provide at any position of the same position as the mixing member, or at a plurality of positions among the above positions. Further, since the mixing member is a completely flat plate member, the nozzle is provided at any position among the above positions, and the operation of flowing the flow fluid in one direction in the pipe and mixing it in the opposite direction. It is possible to perform the mixing operation, that is, to perform the mixing operation by switching the flow direction of the flowing fluid. As a result, when mixing different additive fluids, one mixing device can also be used, and the flow direction of the flow fluid and the position of the nozzle corresponding to the flow conditions and mixing conditions of the flow fluid The relationship can be adapted appropriately.

1 is a cutaway perspective view of a static mixing device as one embodiment of the present invention. 1 is a cross-sectional view in the plane including the axis of the apparatus, is broken at the same angle position as FIG. FIG. 3 is a cutaway perspective view of a mixing member used in the static mixing device of FIGS. 1 and 2, wherein (A) is an example, (B) is another example, and (C) is yet another example. It is sectional drawing in the surface containing the axis line of a static mixing device as a modification in 1st embodiment, and is fractured | ruptured at the position of the same angle as FIG. It is a graph which shows the mixed state of the inflow fluid and added fluid by 1st embodiment as an Example with a comparative example. It is a partially broken perspective view of the mixing apparatus of 2nd embodiment, (A) shows the mixing apparatus single-piece | unit, (B) shows the state attached to the pipe member. It is sectional drawing in the surface which passes along the axis line of FIG. 6 (B). It is a figure which shows the structure of the processing apparatus at the time of ballast water intake as an example of 3rd embodiment. It is a figure which shows the structure of the ballast water discharge processing apparatus as another example of 3rd embodiment. It is a figure which shows the structure of the ballast water treatment apparatus which can be used for both the time of ballast water intake as another example of 3rd embodiment, and the time of ballast water discharge | emission.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

<First embodiment>
In addition to the mixing member 2, the static mixing device 1 of the present embodiment shown in FIGS. 1 and 2 includes a nozzle 3. The mixing member 2 is formed as a flat plate-like member, and is sandwiched between the joint portions 4A and 4A of the two pipe members 4 and 4 that form a conduit for the flowing fluid flowing in the direction of arrow A. The nozzle 3 is located upstream of the mixing member 2 and penetrates the tube wall of the tube member 4 so as to protrude inward in the radial direction of the tube. A discharge port for the additive liquid to be mixed is provided at the tip of the nozzle 3.

  In the present embodiment, the pipe members 4 and 4 have a loosely tapered surface so that the inner diameter increases toward the pipe end in the vicinity of the joint portions 4A and 4A. By expanding the inner diameter with the tapered surface in the vicinity of the front and rear direction of the mixing member 2 sandwiched between the joint portions 4A and 4A, it is possible to secure a large opening 8 of the mixing member 2 to be described later. The pressure loss of the fluid delivery can be reduced. However, it is not necessary to increase the inner diameter in the vicinity of the joint portions 4A and 4A if the pressure loss is acceptable.

  As shown in FIGS. 3 (A) and 3 (B), the mixing member 2 made as a plate-like member includes a ring portion 5 sandwiched between the joint portions 4A and 4A, and the ring portion 5. And a flap portion 6 extending radially inward. In the present embodiment, two flap portions 6 are provided so as to face each other in the diametrical direction. Therefore, the openings 8 and the flap portions 6 are positioned so as to alternately occupy a 90 ° range in the circumferential direction. ing.

  Moreover, in the mixing member 2 shown to FIG. 3 (A), the ring part 5 has the same inner / outer diameter as the inner / outer diameter of the joint part 4A. The ring portion 5 is formed with holes 5B through which bolts (not shown) used to be sandwiched between the joint portions 4A and 4A are distributed at a plurality of positions in the circumferential direction. In the mixing member 2 shown in FIG. 3B, the ring portion 5 has the same inner diameter as the inner diameter of the joint portion 4A. Bolts (not shown) are arranged and fixed radially outward from the ring portion 5 so that the mixing member 2 is sandwiched between the joint portions 4A and 4A.

  Furthermore, the mixing member 2 made as a plate-like member is preferably provided with a visual protrusion 2A that protrudes radially outward at a specific position in the circumferential direction, as shown in FIG. If this visual projection 2A is provided, the visual projection 2A can be visually observed from the outside even if the mixing member 2 is clamped and held by the joints 4A and 4A of the pipe members 4 and 4, so the joint 4A is visible. , 4A and the circumferential positional relationship with the nozzle 3 can be easily set to the regular positional relationship.

The flap portion 6 has a base portion 6A connected to the ring portion 5 and an end portion 6B extending radially inward from the base portion 6A. The base 6A has a straight side edge 6A-1 extending inward in the radial direction, and the end 6B has an arcuate edge that protrudes sideward from a line extending the side edge 6A-1. 6B-1 is formed, and the narrow region 7 located on the tube axis line is formed between the end portions 6B and 6B of the two flap portions 6 and 6 facing each other.

  The opening 8 formed between the two flap portions 6 and 6 in the circumferential direction is formed by the arc portion 5A forming the inner peripheral edge of the ring portion 5 and the side edge 6A− of the two flap portions 6 and 6. 1 and two fan-shaped regions 9 formed by being surrounded by the edge 6B-1 of the end 6B are communicated by the narrow region 7 to form one opening. As the shape of the flap part 6 and the fan-shaped area 9, it is preferable to use the following shapes. That is, it is preferable that the angle between the side edge 6A-1 of the flap portion 6 and the circular arc portion 5A of the ring portion 5, that is, the angle of the corner of the fan-shaped region 9 of the opening 8 is 90 degrees or more. By making the shape, the strength of the base portion 6A of the flap portion 6 can be ensured. Further, the angle between the side edge 6A-1 and the arc portion 5A, that is, the angle of the corner of the fan-shaped area 9 is set to 90 degrees (in a shape in which the inner extension line of the side edge 6A-1 intersects the tube axis). It is more preferable that the strength of the base portion 6A of the flap portion 6 is ensured and the opening area ratio of the fan-shaped region 9 of the opening portion 8 can be optimized.

  When the mixing member 2 formed in this way is sandwiched between the joint portions 4A and 4A of the pipe members 4 and 4, as shown in FIGS. 1 and 2, the inner edge of the opening 8 on the ring portion 5 side is formed. That is, since the inner diameters of the circular arc portion 5A of the ring portion 5 and the joint portions 4A and 4A of the pipe members 4 and 4 are the same, there are no irregularities on the inner diameter surface and a smooth inner peripheral surface of the same level is formed.

  When a flow fluid is caused to flow in the direction of arrow A from the upstream side to the downstream side as shown in FIGS. 1 and 2 through the pipe having the static mixing device 1 of this embodiment, the flow is The fluid flows through the opening 8 of the mixing member 2 and flows downstream. The inflow fluid flowing in the narrow region 7 of the opening 8 and the vicinity thereof forms a Karman vortex street on the back side, that is, the downstream side of the flap portions 6 and 6, and actively disturbs the inflow fluid. Therefore, the additive fluid injected from the nozzle 3 to the position of the narrow area 7 rides on the flow of the flow fluid and flows downstream, and due to the turbulence of the flow fluid, it spreads rapidly and widely diffuses into the flow fluid. Mixed with the fluid. The feed fluid mixed with the added fluid flows further downstream.

  As described above, the flap portions 6 and 6 forming the narrow region 7 contribute to the formation of the Karman vortex street on the downstream side, but the fan-shaped opening portion 8 formed between the flap portions 6 and 6 in the circumferential direction. Since the circular arc portion has the same inner diameter as the inner diameter of the tube, the region can flow with low resistance to the flow fluid, and further ensures a large flow rate under a large flow area. As a result, as described, the mixing capacity for the added fluid is increased.

  In the present embodiment, the mixing member 2 can be implemented as a modified form of that shown in FIGS. For example, as shown in FIG. 4, the mixing member 2 is provided with an annular portion 10 along the tube member 4 at the boundary portion between the ring portion 5 and the flap portion 6, or an end portion 6 </ b> B of the flap portion 6. It is possible to incline toward the inside of the radius toward the downstream side.

  The provision of the annular portion 10 means that the range from the ring portion 5 to the flap portion 6 is bent in a crank shape as can be seen in FIG. It will be able to withstand even strong fluid resistance. If the tubular member 4 is provided with a tapered portion, the annular portion 10 is positioned in contact with the tapered portion, so that a situation in which the flow area of the tubular member 4 is reduced due to the presence of the annular portion 10 can be avoided. In addition, the inner diameter of the annular portion 10 does not become smaller than at least the inner diameter of the cylindrical portion of the tube member 4. Therefore, the fluid resistance is not increased by the presence of the annular portion 10. Furthermore, the fluid resistance can be reduced by inclining the end portion 6B of the flap portion 6.

  In this embodiment, both the inflow fluid and the added fluid can be liquid or gas.

  In the present embodiment, the nozzle 3 is not essential. For example, if the additive fluid has already been added to the inflow fluid on the upstream side, if the additive fluid passes through the mixing member 2 with insufficient diffusion / mixing, it will be sufficient on the downstream side of the mixing member. It becomes to diffuse and mix.

  In the present embodiment, the nozzle 3 is provided on the upstream side with respect to the mixing member 2, but the nozzle 3 is positioned on the downstream side or the mixing member with respect to the mixing member 2 in the flow direction of the flowing fluid. You may provide in the position of the same position. Further, the nozzle 3 may be provided at a plurality of positions among the upstream position, the downstream position, and the position of the mixing member 2. In the present embodiment, the discharge port of the additive liquid is provided at the tip of the nozzle 3, but there is no particular limitation as long as the position of the discharge port of the additive fluid is within the opening in the circumferential direction and the radial direction. . In addition, the number of discharge ports and the number of nozzles can be freely set.

  The nozzle 3 positioned on the upstream side with respect to the mixing member 2 enters radially inward with respect to the tube member 4, and the discharge port at the tip of the nozzle 3 is positioned at the center of the tube member 4. It is preferable that the flow rate of the added fluid fed from the discharge port of the nozzle 3 into the tube member 4 is set to about 1/10 of the flow rate of the fluid flowing in the tube member 4. By doing so, the mixing and diffusion of the added fluid starts from the center position of the tube member 4 and is uniformly mixed and diffused in a short distance range in the axial direction of the tube member 4. If the flow rate of addition is larger than the set value, mixing and diffusion of the added fluid starts at a position away from the axis in the radial direction, so that a uniform range of distance is required for uniform mixing and diffusion. This is not preferable.

  In the present embodiment, the mixing member has a ring part that is sandwiched between joint parts for connecting pipe lines and is attached to the joint part. However, the present invention is not limited to this, and the mixing member is in the middle of the pipe line. It may be fitted to, or inserted in, the mounting member.

<Example>
Next, the results of testing while comparing the mixing apparatus (example) of the present embodiment with the conventional apparatus (comparative example) of Patent Document 1 will be described with reference to FIG.

In FIG. 5, the horizontal axis indicates a position downstream from the mixing device in the pipe, and is represented by a distance ratio obtained by dividing the distance X from the mixing device by the inner diameter D of the pipe member. The position of the mixing device (the position of the mixing member 2 in the configuration of FIG. 1), where P is the position of the nozzle. The vertical axis shows the concentration ratio for representing the state in which the additive fluid is mixed with the inflow fluid, and the concentration ratio is a value obtained by dividing the concentration measurement value by the concentration when completely uniformly mixed, The concentration ratio 1 is in a completely uniformly mixed state, and the values measured at horizontal positions (perpendicular to the plane of the paper in FIG. 2) at different positions in the tube axis direction of the pipe are It shows what concentration ratio is distributed. The range surrounded by the solid line indicates the concentration ratio distribution of the example, and the range surrounded by the broken line indicates the concentration ratio distribution of the comparative example.

  In the result of FIG. 5, in the embodiment according to the present invention, the concentration ratio is dispersed in a wide range at the position of the mixing device (in the case of the distance ratio 0), but rapidly converges toward the downstream side, and the distance ratio 2 The concentration ratio approaches 1 at ˜3. On the other hand, in the comparative example, the distance ratio is close to 1 at a distance ratio of 4 to 5. Further, even when the distribution of the concentration ratio was measured at vertical (in the vertical direction in FIG. 2) radial positions at different positions in the tube axis direction of the tube, substantially the same results were obtained. As a result, in the embodiment, the concentration ratio is 1, that is, a completely uniform mixing state at a position quite close to the mixing device in the flow direction of the pipe, so that the space for mixing can be reduced, and the ballast water treatment device When applied to a mixing device, this means that the device can be made compact.

<Second embodiment>
Next, based on FIG. 6 (A) and (B), the static mixing apparatus as 2nd embodiment of this invention is demonstrated. In the first embodiment, the mixing member 2 and the nozzle 3 are separately attached to the tube member 4 and held by the tube member 4, but in this embodiment, as seen in FIG. Before the attachment to the tube member 4, the mixing member 2 and the nozzle 3 are formed as one unit.

  In the present embodiment, the mixing member 2 is connected to the annular plate 12 by welding or the like at the inner diameter edge position of the connecting portion 11 via the connecting portion 11 having a horizontal short cylindrical shape, and is integrated so as to form a unit. . Therefore, since the mixing member 2 itself is the same as that in FIG. 1 of the first embodiment, the description thereof will be omitted. However, the inner diameter of the ring portion 5 of the mixing member 2, the inner diameter of the connecting portion 11, and the annular plate 12 are further described. And form one continuous cylindrical surface with the same inner diameter.

  The annular plate 12 has the same inner diameter and outer diameter as the ring portion 5 of the mixing member 2, and has a form in which the flap portion 6 is removed from the mixing member 2. Therefore, the inner diameter of the annular plate 12 is the same as the inner diameter of the tube member described later.

  A support tube 13 extending radially outward is attached to the connecting portion 11 at one place in the circumferential direction by welding or the like. The support cylinder 13 has an inner diameter larger than the outer diameter of the nozzle 3, and the nozzle 3 can be disposed through the support cylinder 13. The support tube 13 has a hole 14A having the same diameter as the outer diameter of the nozzle 3 at the upper end and a flange portion 14 protruding outward in the radial direction of the support tube 13. The nozzle 3 penetrating from above through 14A is held in the hole by welding or the like. The flange portion 14 is also formed with mounting holes 14B at a plurality of positions in the circumferential direction. As in the case of the first embodiment, the held nozzle 3 is positioned on the tube axis line where the discharge port at the lower end is the center of the conduit.

  In this way, the unit in which the mixing member 2 and the nozzle 3 are integrated is sandwiched and held by the joint portions 4A and 4A of the pipe members 4 and 4, as seen in FIG. 6B and FIG.

  In this embodiment, the pipe members 4 and 4 do not have a tapered portion at the pipe end as in the first embodiment, and the inner diameter is the same straight pipe at any position of the pipe length. Joint ends 4A and 4A are provided at the pipe ends, and bolt holes 4A-1 and 4A-1 are formed in the joint portions 4A and 4A at a plurality of positions in the circumferential direction. The diameter of the pitch circle provided with the bolt holes 4A-1 is set to be larger than the outer diameters of the mixing member 2 and the annular plate 12 of the unit.

  The unit of this embodiment is arranged between the joint portions 4A and 4A of the pipe members 4 and 4, and the above joint portion by means of bolts (not shown) that are fastened through the bolt holes 4A-1 of the joint portions 4A and 4A. The pressure is held between 4A and 4A. Thus, the lower end discharge port of the nozzle 3 of the unit held by the joint portions 4A and 4A is automatically positioned on the tube axis of the tube member 4.

  In this way, after the unit is attached to the pipe member, the pipe for supplying the added fluid is connected to the flange portion 14 of the support cylinder 13 by the attachment bolt 4B (see FIG. 7) inserted into the attachment hole 14B. By doing so, it is set in a state in which the additive fluid can be supplied to the nozzle 3.

  In the present embodiment, since the static mixing device is formed as one unit, its handling becomes easy. Moreover, in this embodiment, since the pipe member has no taper portion and is a straight pipe having a uniform inner diameter, the shape of the pipe member is simplified.

  In the present embodiment, it is preferable to provide a suspension piece on the connecting portion 11 of the unit for convenience of suspension work during handling. For example, if an ear-shaped projecting piece in which a hole for suspension is formed is attached to the connecting portion by welding or the like at the upper position of the connecting portion 11 that is both sides of the nozzle in the circumferential direction, the unit is large. Even if the weight is large, it can be easily suspended by a chain block or the like.

<Third embodiment>
Next, the static mixing device according to the present invention described in the first and second embodiments is mixed to diffuse and mix the bactericide supplied to the filtered seawater for use as ballast water taken from the sea As an apparatus, it is configured as a mixing apparatus that diffuses and mixes a disinfectant into the ballast water when draining the ballast water supplied with the disinfectant, and an embodiment in which this is incorporated into the ballast water treatment apparatus explain. Hereinafter, based on FIG. 8 thru | or FIG. 10 of an accompanying drawing, an example is concretely demonstrated about the ballast water treatment apparatus which concerns on this invention.
-Ballast water intake treatment device FIG. 8 is a block diagram showing the ballast water intake treatment device. As shown in FIG. 8, the ballast water intake processing device includes a sea chest (seawater intake port) 40 for taking seawater into the ship, a seawater intake line 41, and a pump for taking seawater and feeding it to a filtration device 44 described later. 43, a filtration device 44 for capturing and removing planktons present in seawater, a sterilizing agent supply device 45 for supplying a sterilizing agent for killing bacteria and plankton remaining in the seawater filtered by the filtration device 44, and a sterilizing agent A mixing device 46 that receives the supplied seawater and diffuses and mixes the disinfectant into the filtered seawater, a treated water feed line 48 that feeds treated water discharged from the mixing device 46 to a ballast tank 47 described later, and the treatment A ballast tank 47 for storing treated water fed from the water feed line 48 is provided. In this embodiment, the static mixing device of the first and second embodiments can be used for the mixing device 46, and the disinfectant is supplied from the disinfectant supply device 45 to the nozzle 3 shown in the first and second embodiments. It can be used as supplied. In FIG. 8, the disinfectant supply nozzle is illustrated as being disposed in the mixing device 46.

  Hereinafter, each apparatus which comprises a ballast water intake time processing apparatus is demonstrated in detail.

(1) Filtration device The filtration device 44 filters plankton contained in the seawater taken from the sea chest (seawater inlet) 40 provided on the side of the ship and taken through the seawater intake line 41 by the pump 43. The material is captured and removed. It is preferable to use a filter having a mesh size of 30 to 100 μm. The reason why the mesh size is 30 to 100 μm is to reduce the frequency of backwashing and shorten the ballast water treatment time at the port of call while keeping the capture rate of zooplankton and phytoplankton at a certain level. In other words, if the mesh size is larger than 100 μm, the capture rate of zooplankton and phytoplankton is remarkably reduced, and if the mesh size is smaller than 30 μm, the frequency of backwashing increases and the ballast water treatment time at the port of call becomes longer. Therefore, it is not preferable.

  As a specific example of the filtering device, it is preferable to use a filter using a notch wire filter, a wedge wire filter or a laminated disk as a filter medium. Moreover, it is preferable to use a filtering device in which the filtering material is formed of a metal mesh filter or a resin cloth filter, and the filter has an opening of 30 to 100 μm.

  A relatively large zooplankton and phytoplankton are captured and removed by a filtering device such as a filter medium having a mesh opening of about 30 to 100 μm, so that the target to be killed by the fungicide is not captured. And become bacteria. Therefore, the disinfectant supply device can greatly reduce the amount of disinfectant used compared to the method of killing all plankton and bacteria in seawater by simply injecting disinfectant without using a filtration device. become. As a result, the disinfectant cost can be reduced and the disinfectant storage tank can be made smaller, so that it can be easily mounted on a ship. In addition, it is possible to reduce the influence of the residual sterilizing agent on the environment and unnecessary or reduce the supply of the decomposing agent supplied to make the sterilizing agent harmless.

(2) Disinfectant supply apparatus The disinfectant supply apparatus 45 is an apparatus that supplies a disinfectant that kills bacteria and plankton remaining in the seawater filtered by the filtration apparatus 44. In the first and second embodiments, The nozzle 3 shown is used as a disinfectant supply nozzle arranged in the mixing device 46 and supplies disinfectant to the filtered seawater. The sterilizing agent supply device 45 includes a tank that stores the sterilizing agent and a liquid feeding device that sends the sterilizing agent to the sterilizing agent supply nozzle at a predetermined concentration. As a disinfectant to be supplied, sodium hypochlorite, chlorine, chlorine dioxide, sodium dichloroisocyanurate, hydrogen peroxide, ozone, peracetic acid, or a mixture of two or more of these can be used. Can also be used.

(3) Mixing device The mixing device 46 diffuses the sterilizing agent supplied from the sterilizing agent supply device 45 into the filtered seawater and has the mixing member 2 shown in the first and second embodiments. A mold mixing device corresponds to this. The sterilizing agent supply nozzle that supplies the sterilizing agent is disposed at any one of the upstream position, the downstream position, and the position of the mixing member in the seawater flow direction with respect to the mixing member of the mixing device 46. As described in the first and second embodiments, the static mixing device of the present invention rapidly diffuses and mixes a bactericidal agent in seawater in a short time to promote the bactericidal action of bacteria by the bactericidal agent. In this way, since the mixing of the sterilizing agent into the seawater after filtration is promoted by the static mixing device, the amount of the sterilizing agent supplied compared to the case where the sterilizing agent is simply injected into the seawater flowing in the pipeline. Can be reduced. By using the static mixing device according to the present invention, the device configuration can be made compact.

  Next, the operation of the ballast water intake processing device of the present embodiment configured as described above will be described. By operating the pump 43, seawater is taken into the ship from the seawater intake line 41. Seawater is supplied to the filter device 44, and zooplankton, phytoplankton, etc. having a size corresponding to the opening of the filter medium of the filter device 44 are removed.

  Plankton and the like captured by the filtering device 44 are washed away by backwashing the filtering material of the filtering device 44 and returned to the sea. Even if it is returned to the sea, it is the same sea area, so there is no adverse effect on the ecosystem. That is, in this example, since the treatment is performed when the ballast water is loaded, the backwash water of the filtration device 44 can be discharged as it is. The seawater filtered by the filtration device 44 is supplied with a sterilizing agent from the sterilizing agent supply device 45, and the sterilizing agent is diffused and mixed in the seawater by the mixing device 46 to be sterilized. The sterilized seawater is stored as ballast water in the ballast tank 47 through the treated water supply line 48.

  When storing seawater in a ballast tank, it is preferable that the disinfectant supplied from the disinfectant supply device remains at a predetermined concentration. This is because the regrowth of bacteria can be suppressed by the effect of the disinfectant remaining in the ballast tank. The concentration at which the sterilizing agent remains is determined as appropriate depending on the type and concentration of the sterilizing agent, the material of the ballast tank and the type of coating, and the amount of the sterilizing agent supplied by the sterilizing agent supply device is adjusted based on this determination.

  The above example is a case where the processing is performed when seawater is loaded into the ballast tank 47. However, when seawater is loaded into the ballast tank 47, the processing is not performed, but the seawater is killed when discharged from the ballast tank 47. Sometimes it is processed. In this case, untreated seawater is stored in the ballast tank 47 through an untreated seawater water supply line (not shown), and the untreated ballast water in the ballast tank 47 is untreated when discharged from the ballast tank 47. After supplying to the filtration device 44 side through a supply line (not shown), the same sterilization treatment as described above is performed thereafter, and the treated ballast water is drained into the sea through the treated water drain line (not shown). To do.

As described above, in this embodiment, zooplankton and phytoplankton of 30 to 100 μm or more are captured and removed by the filtration device 44, and bacteria and plankton are killed by the bactericide supply device and the mixing device. Therefore, it is possible to reliably and inexpensively treat ballast water satisfying the ballast water standard set by IMO regardless of the water quality. Moreover, since the structure of an apparatus is simple, application to the existing ship is easy.
Ballast Water Drainage Treatment Device FIG. 9 shows the configuration of the ballast water drainage treatment device when the ballast water stored in the ballast tank 47 is drained. The ballast water drainage treatment apparatus includes a disinfectant decomposing agent supply device 50, a mixing device 51, and a pump 52, and the ballast tank 47 and the mixing device 51 are connected by a pre-treatment ballast water drainage line 49. Thus, the treated ballast water is discharged by the pump 52 through the treated ballast water drain line 53 into the sea. In this embodiment, the static mixing device of 1st and 2nd embodiment can be used for the said mixing device 51, and it sterilizes from the disinfectant | decomposable-agent decomposition agent supply apparatus 50 to the nozzle 3 shown by 1st and 2nd embodiment. It can be used in such a way as to supply an agent-decomposing agent. In FIG. 9, the mixing device 51 is illustrated as having a disinfectant supply agent nozzle.

  In the ballast water stored in the ballast tank 47, in order to suppress the regrowth of bacteria as described above, the disinfectant remains at a predetermined concentration. When this ballast water is drained, a disinfectant decomposer is supplied to the ballast water and diffused and mixed to decompose and disinfect the disinfectant. Ballast water drainage also needs to be completed within the time of loading on the ship, and it is necessary to disperse and mix the disinfectant decomposer in a short time.

(4) Disinfectant decomposing agent supply device The disinfectant disinfectant supplying device 50 in the ballast water drainage treatment device supplies the disinfectant disinfectant to the ballast water to which the disinfectant is added and supplies the disinfectant remaining in the ballast water. By decomposing, it is made harmless.

  The nozzle 3 shown in the first and second embodiments is used as a sterilizing agent decomposing agent supply nozzle arranged in the mixing device 51, and the sterilizing agent decomposing agent is added to the ballast water drained from the ballast tank 47. The disinfectant that is supplied from the supply nozzle and diffused and mixed by the mixing device 51 and remains in the ballast water is decomposed and rendered harmless. The sterilizing agent decomposing agent supply device 50 includes a tank that stores the sterilizing agent decomposing agent and a liquid feeding device that sends the sterilizing agent decomposing agent to the sterilizing agent decomposing agent supply nozzle at a predetermined concentration.

(5) Mixing device The mixing device 51 diffuses the disinfectant decomposer supplied from the disinfectant decomposer supply device 50 into the ballast water, and has the mixing member 2 shown in the first and second embodiments. A static mixing device corresponds to this. The sterilizing agent decomposing agent supply nozzle for supplying the sterilizing agent decomposing agent is any one of an upstream position, a downstream position, and a mixing member position in the ballast water flow direction with respect to the mixing member of the mixing device 51. Placed in.

  When using a chlorine disinfectant such as sodium hypochlorite or chlorine as a disinfectant, the disinfectant decomposer supplied to these is sodium sulfite, sodium bisulfite (sodium hydrogen sulfite), sodium thiosulfate Can be used. In addition, sodium sulfite, sodium bisulfite (sodium hydrogen sulfite), and sodium thiosulfate can be used as the disinfectant decomposing agent supplied to hydrogen peroxide as the disinfectant.

  The disinfectant decomposition agent is rapidly diffused and mixed in the ballast water in a short time by the static mixing apparatus of the present invention, thereby promoting the disinfecting of the disinfectant. As described above, since the mixing of the bactericide decomposer into the ballast water is promoted by the static mixing device of the present invention, the ballast water can be rendered harmless and drained in a short time. Further, by using the static mixing device of the present invention, the device configuration can be made compact.

-Ballast water treatment apparatus Next, the ballast water treatment apparatus which can cope with both at the time of taking in ballast water and at the time of draining is demonstrated based on FIG.

  In FIG. 10, each device constituting the ballast water intake treatment device is connected as indicated by a solid line, and each device constituting the ballast water drainage treatment device is connected as indicated by a broken line. About each apparatus itself, it is the same as the case in FIG.8 and FIG.9, and attaches | subjects the same code | symbol to a common apparatus, and abbreviate | omits the description. Each device is connected in the same manner as in FIGS. 8 and 9, but in FIG. 10, each of the mixing device and the pump can be shared for both ballast water intake and ballast water drainage. For this purpose, the seawater intake line 41 is provided with an open / close valve 61 between the sea chess 40 and the pump, and an open / close valve 62 between the pump and the filtration device 44. Further, the treated ballast water drain line 53 is provided with a mixing device. An on-off valve 63 is provided between the pump and an on-off valve 64 on the downstream side of the pump, and ballast water intake processing or ballast water drainage processing can be performed by switching between these on-off switching.

  At the time of ballast water intake, the on-off valves 61 and 62 are opened, and the on-off valves 63 and 64 are closed. By doing so, the same configuration as the ballast water intake processing device shown in FIG. 8 is obtained.

  Next, at the time of ballast water drainage, the on-off valves 61 and 62 are closed, and the on-off valves 63 and 64 are opened. By doing so, the same configuration as the ballast water drainage treatment apparatus shown in FIG. 9 is obtained.

  Under such a configuration, treatment at the time of ballast water intake and ballast water drainage can be selectively performed. At that time, the pump functions as the pump 43 in FIG. 8 when the ballast water is taken, and as the pump 52 in FIG. 9 when the ballast water is drained. Further, the mixing device functions as the mixing device 46 in FIG. 8 at the time of ballast water intake, and as the mixing device 51 in FIG. 9 at the time of ballast water drainage. Thus, both the pump and the mixing device can be shared during ballast water intake and ballast water drainage.

  In the mixing device 46 that mixes the bactericide with the filtered seawater in the apparatus configuration of the ballast water intake processing device indicated by the solid line in FIG. 10, the filtered seawater is flowed from the left side to the right side of the mixing device 46. Moreover, in the mixing apparatus 51 which mixes a disinfectant | decomposable agent decomposition agent with the ballast water before a process among the apparatus structures of the ballast water drainage processing apparatus shown with a broken line, the ballast water before a process is flowed from the right side of the mixing apparatus 51 to the left side. . The flow direction of the flowing fluid is reversed between the mixing device 46 in the case of ballast water intake processing and the mixing device 51 in the case of ballast water drainage processing.

  When the static mixing device in which the mixing member shown in FIGS. 1, 2, 6, and 7 is a flat plate member is used as the mixing device, in the case of ballast water intake processing in the mixing device, the ballast water A sufficient mixing effect can be obtained by setting the flow direction of the inflowing fluid in the reverse direction in the case of the treatment during drainage. The pre-treatment ballast water drainage line 49 is also used as the treated water feed line 48, and in the case of ballast water drainage treatment, the pre-treatment ballast water drainage line 49 (treated water feed line 48) is used from the ballast tank 47 before the treatment. Ballast water is fed to the mixing device 51 (46) in the reverse direction in the case of the ballast water intake process, and the disinfectant is mixed to treat the ballast water. By doing so, the pre-treatment ballast water drain line 49 can also be used as the treated water feed line 48, and the line connecting the mixing device and the ballast tank 47 can be made into one pipe line. The configuration of the apparatus becomes more compact, restrictions on mounting on a ship can be eliminated, and the apparatus cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Static mixing device 2 Mixing member 3 Nozzle 4 Pipe line (pipe member)
DESCRIPTION OF SYMBOLS 5 Ring part 5A Arc part 6 Flap part 6A Base part 6B End part 7 Narrow area 8 Opening part 9 Fan-like area 10 Annular part 44 Filtration apparatus 45 Disinfectant supply apparatus 46 Mixing apparatus 47 Ballast tank 50 Disinfectant decomposition agent supply apparatus 51 Mixing apparatus

Claims (8)

In a static mixing device having a mixing member attached in the middle of a pipeline in order to mix the additive fluid added to the fluid in the pipeline with the fluid,
The mixing member is a single flat plate that forms a plate member that expands in the radial direction, and a ring portion that forms an outer peripheral portion, and a flap portion that extends radially inward from the ring portion at a pair of diametrically opposed positions. And an opening formed between adjacent flap portions in the circumferential direction,
The flap portion has a base portion connected to the ring portion and an end portion extending radially inward from the base portion, and the base portion has side edges extending linearly inward in the radial direction from the ring portion on both sides in the circumferential direction. And the end has an arcuate edge that protrudes laterally from the line extending the side edge, and forms a side edge of the base of the flap part and an inner periphery of the ring part. The angle at which the arc part intersects with the arc part is 90 degrees or more, and the side edges on both sides in the circumferential direction of the base part are tapered to gradually reduce the distance from the ring part toward the edge part of the end part. And
A narrow area is formed at the tube axis position between the ends of the two opposing flap portions,
The opening is formed in two fan-like areas formed by forming an inner peripheral edge of the ring portion and surrounded by an arc portion having the same inner diameter as the inner wall surface of the pipe, a side edge of the base portion of the two flap portions, and an edge portion of the end portion of the flap portion. Is formed as one opening that is communicated by the narrow region .   The static mixing device according to claim 1, wherein the flap portion forms a plane perpendicular to the pipe axis. In a static mixing device having a mixing member attached in the middle of a pipeline in order to mix the additive fluid added to the fluid in the pipeline with the fluid,
The mixing member is a plate member that expands in the radial direction, and includes a ring portion that forms an outer peripheral portion, a flap portion that extends radially inward from the ring portion at a pair of diametrically opposed positions, and a flap portion that is adjacent in the circumferential direction. Having an opening formed between them,
The flap portion has a base portion connected to the ring portion and forming a plane perpendicular to the pipe axis, and an end portion extending radially inward from the base portion, and the base portion is radially inward from the ring portion. Side edges extending in the circumferential direction on both sides in the circumferential direction, and the end portions are inclined inward in the radial direction toward the downstream side of the inflowing fluid, to the side of the line extending the side edges. It has an arcuate edge that curves and protrudes, and the angle between the side edge of the base part of the flap part and the arc part forming the inner peripheral edge of the ring part is 90 degrees or more, and the circumference of the base part Side edges on both sides of the direction are tapered to gradually reduce the distance from the ring part toward the edge of the end part,
A narrow area is formed at the tube axis position between the ends of the two opposing flap portions,
The opening is formed in two fan-like areas formed by forming an inner peripheral edge of the ring portion and surrounded by an arc portion having the same inner diameter as the inner wall surface of the pipe, a side edge of the base portion of the two flap portions, and an edge portion of the end portion of the flap portion. Is formed as one opening that is communicated by the narrow region .   The stationary mixing device according to claim 3, wherein the mixing member is provided with an annular portion in contact with the inner wall surface of the pipe at a boundary position between the ring portion and the flap portion.   A nozzle for adding the additive fluid is further provided, and the nozzle is provided at at least one of the upstream position, the downstream position, and the same position as the mixing member with respect to the mixing member in the flow direction of the flowing fluid. 5. The static mixing device according to claim 1, wherein the static mixing device is provided.   A filtration device for capturing the plankton by filtering the taken-in seawater, a disinfectant supply device for supplying the filtered water with a disinfectant that kills plankton and bacteria present in the filtered water after filtration, and the disinfectant And a mixing device for diffusing and mixing the filtrate with filtered water, wherein the mixing device is the static mixing device according to any one of claims 1 to 5.   A bactericide decomposer supplying device for supplying a bactericide decomposer to the ballast water in which the bactericide from the ballast tank remains, and a mixing device for diffusing and mixing the bactericide decomposer into the ballast water. A ballast water discharge treatment apparatus, which is the static mixing apparatus according to any one of claims 1 to 5.   A filtration device for capturing the plankton by filtering the taken-in seawater, a disinfectant supply device for supplying the filtered water with a disinfectant for disinfecting plankton and bacteria present in the filtered water after filtration, and the disinfectant A mixing device that diffuses and mixes with filtered water, a water supply device that supplies the mixed filtered water to the ballast tank as ballast water, and a disinfectant that supplies a disinfectant disinfectant to the ballast water from which the disinfectant remains from the ballast tank A disinfectant supply device and a mixing device for diffusing and mixing the disinfectant disinfectant into the ballast water, and switching between water supply to the ballast tank of filtered water and drainage of the ballast water from the ballast tank, The diffusive mixing and the sterilizing agent diffusion supply are alternately performed in a common mixing device, the mixing device according to one of claims 1 to 5. Ballast water treatment system which is a stop mixing device.

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