JP4462580B1 - Lime water sprayer - Google Patents

Abstract

A lime water spraying device capable of effectively preventing red tides over a wide sea area.
A hull 1 is provided with a seawater supply amount adjusting unit 12 for temporarily storing seawater sent from a pump 11. The hull 1 is provided with saturated lime water supply hold 13 and blending hold 14a, 14b, 14c, 14d. The saturated lime water supply hold 13 is loaded with lime in advance, and seawater is supplied to the lime from the seawater supply amount adjustment unit 12 to generate saturated lime water. The blending holds 14a, 14b, 14c, and 14d are supplied with saturated lime water from the saturated lime water supply hold 13 and seawater from the seawater supply amount adjusting unit 12, and have a predetermined concentration, that is, a predetermined level. pH lime water is produced and accumulated.
[Selection] Figure 1

Description

  The present invention relates to a lime water spraying device that spreads lime water from the hull to the sea surface, adjusts the pH of seawater near the sea surface, and prevents or suppresses the occurrence of red tides.

In recent years, red tides have frequently occurred due to eutrophication in the sea area, and this has caused serious damage to fisheries. When the red tide occurs, the sea area becomes deficient due to the abnormal occurrence of plankton due to eutrophication, and fish growing in this sea area die, but the red tide occurs in a relatively wide area, so to prevent the red tide There is a need for a prevention method that can effectively prevent over a wide sea area.
An example of a technique relating to prevention of red tide occurrence is described in Patent Document 1 and Patent Document 2.

JP 2008-239516 A JP-A-9-154466

All of these technologies spray red tide prevention agents into the sea and are effective in specific narrow waters, but the sprayed water is limited, so the red tide is effective over a wide area. Cannot be prevented.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lime water spraying device that can effectively prevent red tides over a wide sea area.

  In order to solve the above problems, a lime water spraying device according to the present invention is a lime water spraying device that sprays lime water from the hull onto the sea surface to adjust the pH of seawater in the vicinity of the sea surface. Seawater supply amount adjusting unit for storing the water, saturated lime water supply hold for accumulating saturated lime water, seawater supplied from the seawater supply amount adjusting unit via a seawater supply pipe, and the saturated lime water supply hold And a plurality of blending holds for accumulating lime water generated by mixing with saturated lime water supplied through a saturated lime water supply pipe, and detecting the pH of seawater in the sea area where the hull sails When the seawater pH sensor detects that the pH of the seawater is smaller than the pH reference value, lime water is sent from the blending hold to the injection nozzle through the lime water delivery pipe, while the hull navigates the sea, Sea surface from injection nozzle Lime water is sprayed, the lime water delivery pipe is provided with a lime water delivery amount adjusting valve, and the lime water level information in the blending hold detected by a water level sensor provided in the blending hold Is transmitted to the water level control unit, and the water level control unit controls the lime water delivery amount adjusting valve based on the water level information to adjust the amount of lime water delivered from the blending hold to the injection nozzle. The water level of the lime water remaining in the blending hold is adjusted so as to realize the state of the stern trim.

  When the pH of the seawater where red tide is likely to occur is taken as the pH reference value, and the pH information of the seawater detected by the seawater pH sensor is smaller than the pH reference value, the occurrence of red tide is caused by starting the spraying of lime water. Can be prevented. In addition, when red tide occurs, lime water is sprayed on the sea surface, so that the cell membrane of zooplankton that abnormally propagated near the sea surface is destroyed and the number of plankton that inhabit is reduced. Therefore, the lack of oxygen in the sea area is improved, and the fish habitat is suitably maintained.

Lime water spraying is possible even when the hull is stopped, but in that case, it is necessary to wait for the lime water to spread and spread on the sea surface, and in order to obtain the effect of lime water spraying over a wide sea area It takes a considerable amount of time. On the other hand, when lime water is sprayed while navigating the hull at sea, lime water can be efficiently sprayed over a wide sea area.
At that time, in order to realize smooth navigation of the hull, it is necessary to consider the load balance of the hull, that is, trim. From this point of view, in the present invention, based on the level of lime water detected by the water level sensor provided in the blending hold, adjust the amount of lime water delivered from the blending hold to the injection nozzle, The load balance of the hull is optimized when navigating the hull.

In the present invention, it is one requirement of the invention to spray the lime water generated in the hull. However, the amount of lime water stored in the hull is always temporally dispersed by spraying the lime water. Will change. As a result, when the load balance of the hull is lost, proper cruise of the hull is hindered. This is a new issue when spraying lime water while the hull is moving, acquiring water level information detected by the water level sensor, adjusting the water level of the remaining lime water, A major feature of the present invention is that the above-described new problem is solved by always maintaining a load balance during the course of the process.
Thereby, the effect by lime water spraying can be acquired in a short time over a wide range of sea areas, and it is possible to effectively cope with the occurrence of red tide and prevent the occurrence of red tide.

  In the present invention, the seawater supply pipe is provided with a seawater supply amount adjustment valve, the saturated lime water supply pipe is provided with a saturated limewater supply amount adjustment valve, and detects the pH of seawater in the sea area where the hull navigates. Seawater pH information is transmitted from the seawater pH sensor to the pH control unit, and the pH control unit controls the seawater supply amount adjustment valve and the saturated lime water supply amount adjustment valve according to the seawater pH information, As the pH of the seawater is smaller, the blending ratio of the seawater and the saturated lime water is increased by increasing the blending ratio of the saturated lime water and increasing the pH of the lime water generated in the holding for mixing. It is preferred that the lime water is determined to be generated.

  By adjusting the pH of the sprayed lime water according to the pH of the seawater, the lime can be used properly without waste.

  In the present invention, the hull is provided with at least one of a wind sensor and a wave height sensor, and at least one of wind power information transmitted from the wind sensor and wave height information transmitted from the wave height sensor is transmitted to the water level control unit. The water level control unit controls the lime water delivery amount adjustment valve based on at least one of the wind power information and the wave height information, and determines the amount of lime water delivered from the blending hold to the injection nozzle. It is preferable that the water level of the lime water remaining in the preparation hold is adjusted.

The progress of the hull at sea depends on the weather in the area.In good weather, a smaller hull weight is more convenient to save fuel, but in bad weather, From the viewpoint of maintaining the stability of the hull, it is desirable that the hull be heavier than in good weather. From such a viewpoint, at least one of the wind power information transmitted from the wind sensor and the wave height information transmitted from the wave height sensor is transmitted to the water level control unit, and the water level control unit is based on at least one of the wind power information and the wave height information. By adjusting the amount of lime water delivered from the blending hold to the spray nozzle, the level of lime water in the blending hold is adjusted to adjust the overall weight of the hull.
As a result, even in bad weather, it can be safely dispatched to the sea area where red tides occur, and agile response is possible regardless of the weather.

  ADVANTAGE OF THE INVENTION According to this invention, the lime water spraying apparatus which makes it possible to prevent red tide effectively over a wide sea area is realizable.

It is a figure which shows the lime water spraying apparatus which concerns on embodiment of this invention provided in the hull. It is a piping system diagram for lime water generation in a lime water spraying device concerning an embodiment of the present invention. It is a control system diagram of the lime water concentration in the lime water spraying device concerning the embodiment of the present invention. It is a control system diagram of the water level of the lime water in the lime water spraying apparatus which concerns on embodiment of this invention. It is a control system diagram of the water level of saturated lime water about the hold | maintenance for saturated lime water supply. It is a side view of a hull.

Below, the lime water spraying apparatus of this invention is demonstrated based on the embodiment.
FIG. 1 shows a lime water spraying device according to an embodiment of the present invention provided on a hull, and shows a configuration of the lime water spraying device on a plan view of the hull.
The hull 1 is provided with a pump 11 for pumping seawater, and is provided with a seawater supply amount adjusting unit 12 for temporarily storing seawater sent from the pump 11. A saturated lime water supply hold 13 is provided at the center of the hull 1, blending holds 14 a and 14 b are provided on the bow side across the saturated lime water supply hold 13, and blending holds 14 c and 14 d on the stern side. Is provided.

  The saturated lime water supply hold 13 is loaded with lime in advance, and seawater is supplied to the lime from the seawater supply amount adjusting unit 12 to generate saturated lime water. The blending hold 14a, 14b, 14c, 14d is supplied with saturated lime water from the saturated lime water supply hold 13 and with seawater from the seawater supply amount adjusting unit 12, and has a predetermined concentration, that is, a predetermined level. pH lime water is produced and accumulated. Details of this will be described later.

A seawater pH sensor 15 is attached to the side of the hull 1 so as to be immersed in seawater. The seawater pH sensor 15 can also be attached in the seawater supply amount adjusting unit 12.
The hull 1 includes a saturated lime water accumulated in the saturated lime water supply hold 13, a pH control unit 16 that controls the pH of the lime water accumulated in the blending holds 14 a, 14 b, 14 c, and 14 d, and a saturation Lime water and a water level control unit 17 for controlling the water level of the lime water are provided. A house 18 is provided on the stern side of the hull 1, and a chimney 19 is provided on the house 18. A wind sensor 20 is provided on the stern side, and a wave height sensor 21 is provided on the bow side.

  The saturated lime water supply hold 13 is equipped with a stirrer 22 for stirring the lime water to make the concentration uniform, and the mixing hold 14a, 14b, 14c, 14d is similarly stirred with a stirrer 23a, 23b, 23c, 23d is attached. The saturated lime water supply hold 13 is provided with a pH sensor 24, and the preparation holds 14a, 14b, 14c, and 14d are similarly provided with pH sensors 25a, 25b, 25c, and 25d. Further, the saturated lime water supply hold 13 is provided with a water level sensor 26, and the preparation holds 14a, 14b, 14c and 14d are similarly provided with water level sensors 27a, 27b, 27c and 27d.

In FIG. 2, the piping system diagram for the lime water production | generation in the lime water spraying apparatus which concerns on embodiment of this invention is shown.
Seawater pumped up by the pump 11 is sent to the seawater supply amount adjustment unit 12 and temporarily accumulated in the seawater supply amount adjustment unit 12. A saturated lime water supply hold 13 is connected to the seawater supply amount adjusting unit 12 through a seawater supply pipe 31. The seawater supply pipe 31 is provided with a seawater supply amount adjustment valve 33, and the flow rate of seawater supplied from the seawater supply amount adjustment unit 12 to the saturated lime water supply hold 13 is adjusted by the seawater supply amount adjustment valve 33. The This seawater and the lime stored in the saturated lime water supply hold 13 are stirred by the stirrer 22 shown in FIG. 1 to generate saturated lime water.

  The preparation hold | maintains 14a, 14b, 14c, 14d are connected to the seawater supply amount adjustment part 12 via the seawater supply pipes 32a, 32b, 32c, 32d. The seawater supply pipes 32a, 32b, 32c, and 32d are provided with seawater supply amount adjustment valves 34a, 34b, 34c, and 34d, respectively, and the seawater supply amount adjustment valves 34a, 34b, 34c, and 34d provide a seawater supply amount adjustment unit. 12 adjusts the flow rate of seawater supplied from 12 to the blending holds 14a, 14b, 14c, 14d.

  To the saturated lime water supply hold 13, blending holds 14 a, 14 b, 14 c and 14 d are connected via saturated lime water supply pipes 35 a, 35 b, 35 c and 35 d. Saturated lime water supply pipes 35a, 35b, 35c, and 35d are provided with saturated lime water supply amount adjustment valves 36a, 36b, 36c, and 36d, respectively, and by saturated lime water supply amount adjustment valves 36a, 36b, 36c, and 36d, respectively. The flow rate of the saturated lime water supplied from the saturated lime water supply hold 13 to the blending holds 14a, 14b, 14c, 14d is adjusted.

  In the blending holds 14a, 14b, 14c, and 14d, the seawater supplied from the seawater supply amount adjusting unit 12 and the saturated lime water supplied from the saturated lime water supply hold 13 are mixed with the stirrer 23a illustrated in FIG. Agitated by 23b, 23c, and 23d, lime water having a predetermined concentration is generated. This concentration adjustment will be described in detail later.

  Injection nozzles 39a, 39b, 39c, and 39d are connected to the mixing holds 14a, 14b, 14c, and 14d through lime water delivery pipes 37a, 37b, 37c, and 37d. The lime water delivery pipes 37a, 37b, 37c, and 37d are provided with lime water delivery amount adjustment valves 38a, 38b, 38c, and 38d, respectively, and are prepared by the lime water delivery amount adjustment valves 38a, 38b, 38c, and 38d. The flow rate of lime water sent from the holdings 14a, 14b, 14c, 14d to the injection nozzles 39a, 39b, 39c, 39d is adjusted. This flow control of lime water will be described in detail later.

In FIG. 3, the control system figure of the lime water density | concentration in the lime water spraying apparatus which concerns on embodiment of this invention is shown.
The seawater pH sensor 15 detects the pH of the seawater in the sea area where the hull 1 navigates, and transmits the pH information of the seawater to the pH control unit 16.
Regarding the supply of seawater to the saturated limewater supply hold 13, when it is determined from the pH information of the seawater detected by the seawater pH sensor 15 that lime water should be sprayed on the seawater surface, the pH control unit 16 The seawater supply amount adjusting valve 33 is controlled to supply seawater to the saturated limewater supply hold 13 to generate saturated limewater. In addition, about the production | generation of saturated lime water, you may produce | generate beforehand regardless of the pH information of seawater. This determination can be made in consideration of the weight necessary for the hull and the trim described later.

  The pH sensor 24 installed in the saturated lime water supply hold 13 monitors the concentration of the lime water and becomes saturated so that the lime water in the saturated lime water supply hold 13 is maintained in a saturated state. The information is notified to the pH control unit 16, and the pH control unit 16 controls the seawater supply amount adjustment valve 33 to stop the supply of seawater to the saturated lime water supply hold 13. When the lime in the saturated lime water supply hold 13 is insufficient, lime is supplied as necessary from a lime tank (not shown) to generate lime water.

  Regarding the supply of seawater and saturated lime water to the blending holds 14a, 14b, 14c, 14d, based on the pH information of the seawater detected by the seawater pH sensor 15, the pH control unit 16 includes a seawater supply amount adjustment valve 34a, 34b, 34c and 34d are controlled to supply seawater to the mixing holds 14a, 14b, 14c and 14d, and the saturated lime water supply amount adjusting valves 36a, 36b, 36c and 36d are controlled to prepare the mixing hold 14a. , 14b, 14c, and 14d are supplied with saturated lime water.

  The blending ratio of seawater and saturated lime water is determined based on the pH information of the seawater detected by the seawater pH sensor 15, and the lower the pH of the seawater, that is, the more the seawater is acidic or close to acidic, Increasing the blending ratio increases the pH of the lime water produced in the blending holds 14a, 14b, 14c, 14d.

Since the red tide is likely to occur when the pH of the seawater is 8.5 or less, when the pH information of the seawater detected by the seawater pH sensor 15 is smaller than the pH reference value, the lime water is pH 8.5. Start spraying.
For example, when the pH of seawater is 8, saturated lime water having a pH of 13 and seawater are mixed, and the pH of the prepared lime water is set to 10.5. When the pH of seawater is less than 8, the blending ratio of saturated lime water is increased. Conversely, when the pH of seawater is greater than 8, the blending ratio of saturated lime water is decreased.

  Zooplankton that proliferated abnormally at the time of the occurrence of the red tide live mainly near the sea surface. When lime water with a pH of more than 10 is sprayed on the sea surface, the mechanism of zooplankton is that the highly alkaline substance dissolves proteins. The number of plankton inhabiting when the cell membrane is destroyed rapidly decreases. Therefore, the lack of oxygen in the sea area is improved, and the fish habitat is suitably maintained. When the lime water is sprayed and the predetermined time elapses, the lime water diffuses into the sea, and the pH of the sea area is lower than when the lime water is sprayed. In this regard, spraying lime water on the sea surface is effective as a means for intensively killing plankton that has abnormally propagated near the sea surface in a short time.

In addition, the respiration of zooplankton that abnormally propagated during the occurrence of red tide causes carbon dioxide generated in the sea to be reduced by reacting with the sprayed lime water to produce calcium carbonate, which causes acidification of seawater. It is suppressed.
Furthermore, by maintaining a state where the pH of the seawater exceeds 8.5, it is possible to suitably maintain the physiological function of the phytoplankton which is a phytoplankton that forms calcium carbonate. The function of absorbing carbon can be promoted.
Due to the above effects, the ecosystem of seafood and aquatic plants is improved. Lime water can be sprayed proactively when the pH of the seawater is detected to be 8.5 or less, or it is dispatched when the red tide actually occurs and concentrates abnormally bred plankton. It can also be used as a means of killing.

The control of the pH of the lime water to be dispersed is performed by setting the pH reference value of seawater and the target value of the pH of the generated lime water in the storage unit of the pH control unit 16 in advance, and the pH of the generated lime water is The calculation unit of the pH control unit 16 calculates the amount of seawater and the amount of saturated lime water required to reach the target value, and the seawater supply amount adjustment valves 34a, 34b, 34c according to the amount of seawater and the amount of saturated lime water. , 34d and the flow rate of the saturated lime water passing through the saturated lime water supply amount regulating valves 36a, 36b, 36c, 36d can be realized by the pH control unit 16.
As the pH value of the measured seawater is much lower than the pH reference value, there is a concern about the acidification of the seawater, so the difference between the measured seawater pH value and the pH reference value is calculated. The target value of the pH of the lime water produced | generated according to it is set. The larger the difference between the pH value of the measured seawater and the pH reference value, the larger the target value of the pH of the generated lime water, and the smaller the difference between the measured seawater pH value and the pH reference value, the more Decrease the target pH value of lime water.

  The pH of the lime water in the blending holds 14a, 14b, 14c, 14d is monitored by the pH sensors 25a, 25b, 25c, 25d, and the information is notified to the pH controller 16, and the pH controller 16 is used for blending. Control is performed so that the pH of the lime water in the holds 14a, 14b, 14c, and 14d becomes a predetermined value.

In FIG. 4, the control system figure of the water level of the lime water in the lime water spraying apparatus which concerns on embodiment of this invention is shown.
The water level information of the lime water in each blending hold detected by the water level sensors 27a, 27b, 27c, 27d provided in the blending hold 14a, 14b, 14c, 14d is transmitted to the water level control unit 17. . Based on this water level information, the water level control unit 17 controls the lime water delivery amount adjusting valves 38a, 38b, 38c, 38d, and the injection nozzles 39a, 39b, 39c, The amount of lime water delivered to 39d is adjusted. As a result, the level of lime water remaining in the blending holds 14a, 14b, 14c, 14d is adjusted.

  The lime water spraying device according to the embodiment of the present invention has a structure in which lime water is accumulated in the blending holds 14a, 14b, 14c, 14d provided in the hull 1, but it is efficient over a wide sea area. In order to spray lime water, it is desirable for the hull 1 to spray lime water while navigating the sea. However, in order to reduce the resistance received from the seawater and to make the hull 1 sail smoothly on the sea, the state where the bow is more floating than the stern, that is, the state of the stern trim is maintained. In order to maintain this state, it is necessary to adjust the balance of the amount of lime water accumulated in the blending holds 14a, 14b, 14c, 14d.

  Therefore, the amount of lime water remaining in the blending holds 14a, 14b, 14c, 14d is adjusted by controlling the amount of lime water sprayed from the spray nozzles 39a, 39b, 39c, 39d. Specifically, the lime water remaining in the mixing holds 14a, 14b located on the bow side is lowered to reduce the weight on the bow side, and the lime remaining in the mixing holds 14c, 14d located on the stern side. The water level is raised to increase the weight on the stern side. Thereby, the state of a stern trim can be implement | achieved and energy saving can be implement | achieved in the progress of a hull.

Such control is performed by presetting water level balance target values for determining the appropriate water level balance in the blending holds 14a, 14b, 14c, and 14d in the storage unit of the water level control unit 17, and the water level sensors 27a, 27b, 27c, and 27d. Based on the level information of the lime water in the blending hold 14a, 14b, 14c, 14d detected by the formula, the blending hold 14a, 14b so that the water level in each blending hold reaches the water level balance target value. , 14c, 14d calculates the amount of lime water to be delivered to the injection nozzles 39a, 39b, 39c, 39d by the calculation unit of the water level control unit 17, and sets the lime water delivery amount adjusting valves 38a, 38b, 38c, 38d. This can be realized by the water level control unit 17 determining the flow rate of the passing lime water.
In order to realize the state of the stern trim, the water level balance target value is set so that the water levels in the blending holds 14a, 14b, 14c, and 14d rise sequentially from the bow side toward the stern side.

  As described above, when the lime water stored in the hull is simply sprayed, there is a situation where the weight balance of the hull is lost due to the act of spraying. Is used as a place for the production and storage of lime water, and in consideration of the weight balance, there is a great feature in that lime water can be sprayed from a plurality of holds.

  In addition, the progress of the hull 1 at sea depends on the weather in the sea. In good weather conditions, the weight of the hull 1 is smaller in order to save fuel and to proceed. However, in bad weather conditions, the stability of the hull 1 can be maintained compared to that in good weather. It is desirable to increase the weight of the hull 1. Therefore, either or both of the wind power information and the wave height information transmitted from the wind sensor 20 and the wave height sensor 21 are transmitted to the water level control unit 17, and the water level control unit 17 performs lime water based on the wind force information and the wave height information. The delivery amount adjusting valves 38a, 38b, 38c, 38d are controlled to adjust the amount of lime water delivered from the blending holds 14a, 14b, 14c, 14d to the injection nozzles 39a, 39b, 39c, 39d.

  Due to this adjustment, the lime water level in the blending holds 14a, 14b, 14c, 14d is lowered to reduce the overall weight of the hull 1 while considering the above-mentioned trim during fine weather, and for blending in bad weather. The water level of the lime water in the holds 14a, 14b, 14c, 14d is raised to increase the overall weight of the hull 1. As a result, even in bad weather, it can be safely dispatched to the sea area where red tides occur, and agile response is possible regardless of the weather.

In FIG. 5, the control system figure of the water level of the saturated lime water about the hold | maintenance 13 for saturated lime water supply is shown.
The water level information in the saturated lime water supply hold 13 detected by the water level sensor 26 provided in the saturated lime water supply hold 13 is transmitted to the water level control unit 17. Based on this water level information, the water level control unit 17 controls the saturated lime water supply amount adjustment valves 36a, 36b, 36c, and 36d, and from the saturated lime water supply hold 13 to the blending hold 14a, 14b, 14c, 14d. The amount of saturated lime water supplied to the is adjusted. By this adjustment, the state of the stern trim described above can be maintained.

  Moreover, either or both of the wind force information and the wave height information transmitted from the wind sensor 20 and the wave height sensor 21 are transmitted to the water level control unit 17, and the water level control unit 17 is saturated lime based on the wind force information and the wave height information. The water supply amount adjusting valves 36a, 36b, 36c, and 36d are controlled to adjust the amount of saturated lime water sent from the saturated lime water supply hold 13 to the blending holds 14a, 14b, 14c, and 14d. Accordingly, the water level is lowered by lowering the level of the saturated lime water in the saturated lime water supply hold 13 in good weather, and the weight is increased by raising the water level in the saturated lime water supply hold 13 in bad weather. is doing.

FIG. 6 is a side view of the hull 1, and shows the level of saturated lime water accumulated in the saturated lime water supply hold 13 and the level of lime water accumulated in the blending holds 14a, 14b, 14c, 14d. Show.
The water level of the lime water 46a, 46b in the blending holds 14a, 14b located on the bow side is made lower as it is closer to the bow than the level of the saturated lime water 45 in the saturated lime water supply hold 13. . Further, the level of the lime water 46c, 46d in the blending holds 14c, 14d located on the stern side is set higher as the stern is closer to the level of the saturated lime water 45 in the saturated lime water supply hold 13. ing. As a result, the hull 1 is lighter on the bow side than the stern side, and the lift height H ₁ from the sea surface 44 on the bow side is higher than the lift height H ₂ on the stern side from the sea surface 44. The stern trim is large.

  Crane 41a, 41b, 41c, 41d is provided for each of the mixing holds 14a, 14b, 14c, 14d, and the injection nozzle support portions 42a, 42b, 42c, 42d attached to the cranes 41a, 41b, 41c, 41d. The nozzles 39a, 39b, 39c, and 39d are provided at the tip of the nozzle. The injection nozzle support portions 42 a, 42 b, 42 c, and 42 d are formed so as to extend in the side surface direction of the hull 1 and protrude to the sea, and the injection nozzles 39 a, 39 b, 39 c, and 39 d are from the sea surface 44 to the sea surface 44. Spray lime water. In order to reduce the number of plankton that abnormally propagated when red tide occurs, the pH value of the seawater near the sea surface 44 is important. Therefore, the lime water only needs to be sprayed thinly on the sea surface 44. It is preferable to spread lime water widely using 39a, 39b, 39c, 39d.

  Since the wave height becomes high during bad weather, there is a high possibility that the screw 43 provided at the stern will come out above the sea surface 44. However, as described above, the saturated lime water accumulated in the saturated lime water supply hold 13 By increasing the water level of 45 and the water levels of lime water 46a, 46b, 46c, 46d accumulated in the blending holds 14a, 14b, 14c, 14d, the overall weight of the hull 1 is increased, Such a situation can be prevented.

  Of the wind and wave heights that serve as weather indicators, there are 12 wind stages, the weather level 1 is 1 to 3 detected by the wind sensor 20, and the weather level 2 is 4 to 5 When the wind class is 6 to 8, the weather level is 3; when the wind class is 9 to 10, the weather level is 4; when the wind class is 11 to 12, the weather level is 5, and the weather level according to each wind class Accordingly, the water level of the saturated lime water 45 accumulated in the saturated lime water supply hold 13 and the water levels of the lime waters 46a, 46b, 46c, 46d accumulated in the blending holds 14a, 14b, 14c, 14d are set.

  The wave height class has 9 classes, the wave height class detected by the wave height sensor 21 is 1 to 2, weather level 1, the wave height class 3 is weather level 2, and the wave height class is 4 to 5 Level 3 is the weather level 4 when the wave height class is 6 to 7, and the weather level 5 is when the wave height class is 8 to 9, according to the weather level corresponding to each wave height class, accumulated in the saturated lime water supply hold 13 The water level of the saturated lime water 45 and the water levels of the lime waters 46a, 46b, 46c, 46d accumulated in the blending holds 14a, 14b, 14c, 14d are set.

  For example, the water level of saturated lime water 45 and the water levels of lime water 46a, 46b, 46c, 46d are set from 1 to 10, and the water level of lime water 46a is set for the water level shown in FIG. Level 2, the level of the lime water 46b is set to level 3, the level of the saturated lime water 45 is set to level 4, the level of the lime water 46c is set to level 5, and the level of the lime water 46d is set to level 6. As the value increases, the water level is raised from this water level.

Control of the water level of the lime water for the blending holds 14a, 14b, 14c, 14d in consideration of the weather can be realized as follows.
Based on the weather level determined by one or both of the wind power information transmitted from the wind sensor 20 and the wave height information transmitted from the wave height sensor 21, the target of the water level in the blending holds 14a, 14b, 14c, 14d A value is preset in the storage unit of the water level control unit 17. The mixing holds 14a, 14b, 14c, which are detected by the water level sensors 27a, 27b, 27c, 27d so that the water levels of the lime water in the mixing holds 14a, 14b, 14c, 14d match the target values of the water levels. Based on the level information of lime water in 14d, the calculation unit of the water level control unit 17 determines the amount of lime water to be sent from the blending holds 14a, 14b, 14c, 14d to the injection nozzles 39a, 39b, 39c, 39d. calculate.

  In response to this lime water delivery amount, the water level control unit 17 determines the flow rate of lime water passing through the lime water delivery amount adjustment valves 38a, 38b, 38c, 38d, and in the mixing holds 14a, 14b, 14c, 14d The water level of lime water is maintained at the target value of the water level. In order to spread lime water over a wide sea area, it is preferable that the lime water is jetted from the jet nozzles 39a, 39b, 39c, and 39d over a long period of time. Based on the time, the flow rate per unit time of the lime water passing through the lime water delivery amount regulating valves 38a, 38b, 38c, 38d is determined.

Moreover, control of the water level of the lime water for the saturated lime water supply hold 13 can be realized as follows.
Based on the weather level determined by one or both of the wind force information transmitted from the wind sensor 20 and the wave height information transmitted from the wave height sensor 21, the target value of the water level in the saturated lime water supply hold 13 is determined as the water level. It is set in advance in the storage unit of the control unit 17. The water level information of the saturated lime water in the saturated lime water supply hold 13 detected by the water level sensor 26 so that the water level of the saturated lime water in the saturated lime water supply hold 13 matches the target value of the water level. Based on this, the calculation unit of the water level control unit 17 calculates the amount of saturated lime water to be supplied from the saturated lime water supply hold 13 to the blending holds 14a, 14b, 14c, 14d. In accordance with the saturated lime water supply amount, the water level control unit 17 determines the flow rate of the saturated lime water passing through the saturated lime water supply amount adjustment valves 36a, 36b, 36c, 36d, and the saturated lime water supply hold 13 The water level of the saturated lime water is maintained at the target value of the water level.
The supply of the saturated lime water from the saturated lime water supply hold 13 to the preparation holds 14a, 14b, 14c, and 14d is also performed by the pH control unit 16 described above, so the control by the pH control unit 16 and the water level control. Which of the controls by the unit 17 is to be prioritized can be appropriately determined according to the situation.

  In the above description, it is assumed that four mixing holds 14a, 14b, 14c, and 14d are arranged for one saturated lime water supply hold 13, but the saturated lime water supply hold and the mixing hold are used. The number of holdings and the installation position are not limited to this, and can be selected as appropriate. Depending on the number and installation positions of saturated lime water supply hold and preparation hold, the piping system diagram for lime water generation shown in FIG. 2, the control system diagram of lime water concentration shown in FIG. 3, FIG. 4, FIG. The control system diagram of the water level of lime water can be changed as appropriate.

According to the lime water spraying apparatus which concerns on embodiment of this invention, the hold | hold for cargo storage normally provided in the hull 1 can be utilized as a space for accumulating lime water, and for accumulation of lime water It is not necessary to add a special structure to the hull 1. Moreover, since seawater is used as the liquid for dissolving lime water, and it can be used by pumping up seawater as necessary, it is highly convenient.
Furthermore, when spraying lime water with the hull 1 stopped, the lime water diffuses and spreads on the sea surface, so it takes a considerable amount of time to spread sufficiently. Since lime water can be sprayed while navigating, lime water can be efficiently sprayed over a wide sea area.

After navigating the red tide generation area and spraying lime water, if the lime water diffuses into the sea over time and the pH of the seawater is still below the pH reference value, sail again and lime By repeating the water spraying, the pH of the seawater can be adjusted sufficiently. At the time of the second navigation, since it is assumed that the pH of the seawater is closer to the pH reference value than at the first navigation, the pH of the generated lime water is set lower than the first time. Since the lime water spraying device of the present invention has a function of adjusting the concentration of lime water to be sprayed, it can be used rationally without consuming waste of lime even when cruising in multiple times. Is possible.
In the above explanation, it is assumed that the hull sails over the sea, but for the purpose of preventing or suppressing the occurrence of red tide in lakes and rivers, the hull navigates lakes and rivers using the same method. It is also possible to spray lime water.

  INDUSTRIAL APPLICABILITY The present invention can be used as a lime water spraying device that can effectively prevent red tides over a wide sea area.

DESCRIPTION OF SYMBOLS 1 Hull 11 Pump 12 Seawater supply amount adjustment part 13 Hold for saturated lime water supply 14a, 14b, 14c, 14d Mixing hold 15 Seawater pH sensor 16 pH control part 17 Water level control part 18 House 19 Chimney 20 Wind sensor 21 Wave height sensor 22 , 23a, 23b, 23c, 23d Stirrer 24, 25a, 25b, 25c, 25d pH sensor 26, 27a, 27b, 27c, 27d Water level sensor 31, 32a, 32b, 32c, 32d Seawater supply pipe 33, 34a, 34b, 34c 34d Seawater supply amount adjustment valve 35a, 35b, 35c, 35d Saturated lime water supply pipe 36a, 36b, 36c, 36d Saturated lime water supply amount adjustment valve 37a, 37b, 37c, 37d Lime water supply pipe 38a, 38b, 38c, 38d Lime water delivery control valve 39a, 39b, 3 c, 39d injection nozzle 41a, 41b, 41c, 41d cranes 42a, 42b, 42c, 42d injection nozzle support 43 screw 44 sea 45 saturated lime water 46a, 46b, 46c, 46 lime water

Claims (3)

A lime water spraying device that adjusts the pH of seawater near the sea surface by spraying lime water from the hull to the sea surface,
Seawater supply amount adjusting unit for temporarily storing seawater, saturated lime water supply hold for accumulating saturated lime water, seawater supplied from the seawater supply amount adjusting unit via a seawater supply pipe, and the saturated lime water A plurality of blending holds for accumulating lime water generated by mixing saturated lime water supplied from a supply hold through a saturated lime water supply pipe;
When the seawater pH sensor that detects the pH of seawater in the sea area where the hull navigates detects that the pH of the seawater is less than the pH reference value, limewater is delivered from the blending hold to the injection nozzle via the limewater delivery pipe. As the hull sails over the sea, lime water is sprayed from the spray nozzle to the sea surface, the lime water delivery pipe is provided with a lime water delivery amount adjustment valve, and the water level provided in the blending hold The water level information in the mixing hold detected by the sensor is transmitted to the water level control unit, and the water level control unit controls the lime water delivery amount adjustment valve based on the water level information, and The level of lime water remaining in the blending hold is adjusted so as to realize the state of the stern trim by adjusting the amount of lime water delivered from the hold to the spray nozzle. Lime water spraying device that. The seawater supply pipe is provided with a seawater supply amount adjustment valve, the saturated lime water supply pipe is provided with a saturated lime water supply amount adjustment valve,
Seawater pH information is transmitted to a pH control unit from a seawater pH sensor that detects the pH of seawater in the sea area where the hull navigates, and the pH control unit uses the seawater pH information to control the seawater supply amount adjustment valve and the saturated lime. By controlling the water supply amount control valve, the smaller the pH of the seawater, the higher the blending ratio of the saturated lime water, and the greater the pH of the lime water generated in the blending hold, The lime water spraying device according to claim 1, wherein a mixing ratio of seawater and the saturated lime water is determined to generate lime water.   At least one of a wind sensor and a wave height sensor is provided on the hull, and at least one of wind power information transmitted from the wind sensor and wave height information transmitted from the wave height sensor is transmitted to the water level control unit, and the water level control unit Is based on at least one of the wind power information and the wave height information, controls the lime water delivery amount adjustment valve, adjusts the amount of lime water delivered to the injection nozzle from the blending hold, The lime water spraying device according to claim 1 or 2, wherein the level of lime water remaining in the blending hold is adjusted.

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