JP6266379B2 - Ballast water treatment system - Google Patents

Description

  The present invention relates to a ship ballast water treatment system.

  2. Description of the Related Art Conventionally, a ship is known that includes a ballast tank for the purpose of improving stability and ensuring sufficient draft (see, for example, Patent Document 1). When the weight of the cargo loaded on the ship is small, this ballast tank floods seawater into the ballast tank as ballast water. On the other hand, when the weight of the cargo is large, the ballast water is drained from the ballast tank. Thereby, adjustment is performed so that the weight of the ship as a whole is appropriate.

JP 2011-072873 A

  In a ship equipped with the above-described ballast tank, since a port for flooding is different from a port for draining, it is required from the viewpoint of environmental protection to remove substances contained in seawater taken as ballast water or to sterilize microorganisms. . For this reason, a reactive agent that treats substances and microorganisms in seawater may be injected into the ballast water, and a neutralizing agent that neutralizes the components of the reactive agent may be injected into the ballast water. However, in such a ballast water treatment system, it is necessary to provide both a line for circulating the reactant to inject the reactant into the ballast water and a line for circulating the neutralizer to inject the neutralizing agent. And the configuration becomes complicated.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a ballast water treatment system that can have a simple configuration.

  In order to solve the above problems, a ballast water treatment system according to the present invention is a ballast water treatment system that injects a reactant into ballast water of a ship and injects a neutralizer that neutralizes the reactant into ballast water. And an injecting portion for injecting the reactant and the neutralizing agent into the ballast water, and a common line provided upstream from the injecting portion and in which the reactant and the neutralizing agent are commonly circulated. .

  In this ballast water treatment system, a common line through which the reactant and the neutralizing agent circulate in common is provided upstream of the injection portion in the line through which the reactant and the neutralizing agent circulate. Thus, when injecting the reactant into the ballast water, the reactant is circulated through the common line, and when injecting the neutralizer into the ballast water, the neutralizer is circulated through the common line. There is no need to provide a separate line for the sump. For this reason, a ballast water treatment system can be made into a simple structure. Further, since the amount of the member used is reduced, the cost can be reduced. In addition, even if the reactant leaks from the common line, the leaked reactant can be neutralized quickly only by circulating the neutralizing agent through the common line, so that safety can be improved.

  Further, in the ballast water treatment system according to the present invention, the reactive agent is a bactericide that sterilizes the ballast water, and the bactericide is injected into the ballast water when the ballast water is submerged in the ship. It is preferable to inject | pour into the ballast water when draining the ballast water from the ship. In this case, microorganisms contained in seawater taken up as ballast water can be sterilized efficiently.

  In addition, the ballast water treatment system according to the present invention further includes a tank that is provided upstream of the common line and stores at least one of the reactant and the neutralizing agent, and the tank and the injection section are different from each other separated by a partition wall. It is preferable that the common line is provided so as to penetrate the partition wall. In this case, since the penetration part provided in a partition needs only one place for penetrating a common line, manufacture becomes easy.

  According to the ballast water treatment system of the present invention, a simple configuration can be achieved.

It is a figure which shows the ship to which the ballast water treatment system which concerns on one Embodiment of this invention is applied. It is the figure which showed roughly the disinfectant distribution channel at the time of flooding in the ballast water treatment system which concerns on one Embodiment of this invention. It is the figure which showed roughly the neutralizing agent distribution channel at the time of drainage in the ballast water treatment system concerning one embodiment of the present invention. It is the figure which showed roughly the state which the disinfectant leaked from the common line. It is the figure which showed roughly the state which neutralizes the leaked disinfectant with a neutralizing agent. It is the figure which showed roughly the disinfectant distribution channel at the time of flooding in the conventional ballast water treatment system. It is the figure which showed schematically the neutralizing agent distribution channel at the time of drainage in the conventional ballast water treatment system.

  Hereinafter, preferred embodiments of a ballast water treatment system according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a view showing a ship to which a ballast water treatment system according to an embodiment of the present invention is applied. The ship 100 shown in the figure exemplifies a tanker that carries and carries petroleum-based liquid cargo such as oil or liquefied natural gas in a cargo space. The ship 100 includes a hull 101, a propulsion device 102, and a rudder 103. The propulsion device 102 propels the ship 100, and for example, a screw shaft is used. The rudder 103 controls the propulsion direction of the ship 100.

  The ship 100 includes an engine room 2, a pump room 3, and a ballast tank 4 inside the hull 101. A ballast water treatment system 1 is installed across the engine room 2 and the pump room 3. The engine room 2 is provided in the rear part of the hull 101 and is a section in which a main engine and the like are installed. The pump chamber 3 is provided in front of the engine chamber 2 and is a section in which, for example, a pump for sucking liquid cargo is installed. The engine room 2 and the pump room 3 are partitioned by a partition wall 7.

  The ballast tank 4 is provided in front of the engine room 2 (that is, on the side of the pump room 3 or further forward). The ballast tank 4 floods or drains the ballast water W according to the weight of the cargo loaded on the ship 100. More specifically, the ballast tank 4 floods the ballast water W by sucking up seawater with a pump when the weight of the cargo is small. Further, the ballast water W is drained into the sea as the weight of the cargo to be loaded increases. As a result, the ship 100 as a whole can be adjusted to an appropriate weight that improves stability and ensures sufficient draft.

  Next, the configuration of the ballast water treatment system 1 will be described. FIG. 2 is a diagram schematically showing a disinfectant flow path during flooding in the ballast water treatment system according to one embodiment of the present invention. FIG. 3 is a diagram schematically showing a neutralizer flow path during drainage in the ballast water treatment system according to one embodiment of the present invention. As shown in FIGS. 2 and 3, the ballast water treatment system 1 extends over the engine chamber 2 and the pump chamber 3, and is installed so as to penetrate the through portion 8 provided in the partition wall 7.

  The ballast water treatment system 1 irrigates the ballast water W into the ballast tank 4 and drains the ballast water W from the ballast tank 4, and the sterilizing agent R into the ballast water W flowing through the dredging drain system 31. And an injection system 11 for injecting the neutralizing agent N. The disinfectant R is injected into the ballast water W in order to disinfect microorganisms contained in the seawater taken in as the ballast water W. Further, the neutralizing agent N is injected before draining the ballast water W containing the bactericidal agent R in order to neutralize the bactericidal agent R that is harmful to marine organisms.

  The dredging drainage system 31 connects a sea chest 32 having a function of a water intake port for taking in seawater as the ballast water W and a function of a drain port for discharging the ballast water W to the outside of the ship, and from the sea chest 32 to the ballast tank 4. A first ballast water line 33 through which the ballast water W is circulated, a second ballast water line 34 through which the ballast water W is circulated by connecting the midpoint of the first ballast water line 33 to the sea chest 32, and the ballast A drainage line 36 that connects the tank 4 to the middle position of the first ballast water line 33 and flows the ballast water W from the ballast tank 4 during drainage, and a ballast water pump 40 for flowing the ballast water W in the drainage drainage system 31. , At least.

  The injection system 11 includes a tank 29 for storing the sterilizing agent R and the neutralizing agent N, a common line 5 through which the sterilizing agent R and the neutralizing agent N circulate in common, and a ballast flowing through the drainage drainage system 31. The injection part 28 which inject | pours the bactericidal agent R and the neutralizing agent N into the water W, and the common pump 6 for flowing the bactericidal agent R and the neutralizing agent N in the injection | pouring system 11 are included at least. The common line 5 functions as a line through which the sterilizing agent R flows when the sterilizing agent R is injected into the ballast water W, and the neutralizing agent N circulates when the neutralizing agent N is injected into the ballast water W. Serves as a functioning line. The common line 5 is provided on the upstream side from the injection portion 28. Here, the upstream side means the upstream side in the flow of the sterilizing agent R and the neutralizing agent N from the tank 29 toward the injection portion 28 in the injection system 11.

  In the present embodiment, the tank 29 is divided into a sterilizing agent tank 12 for storing the sterilizing agent R and a neutralizing agent tank 22 for storing the neutralizing agent N. For this reason, the 1st disinfectant line 13 which connects from the disinfectant tank 12 to the common line 5 is provided, and similarly, the 1st neutralizer line 23 which connects from the neutralizer tank 22 to the common line 5 is provided. Is provided. The tank 29 may be a single tank that functions as the sterilizer tank 12 and also functions as the neutralizer tank 22. In this case, the tank 29 is replenished with the bactericide R or the neutralizer N as necessary. According to this, it is not necessary to provide the 1st disinfectant line 13 and the 1st neutralizer line 23, and it can be set as a further simple structure.

  In the present embodiment, the injection unit 28 is divided into a bactericide injection unit 17 that injects the bactericide R into the ballast water W and a neutralizer injection unit 27 that injects the neutralizer N into the ballast water W. ing. For this reason, the 2nd disinfectant line 14 which connects from the common line 5 to the disinfectant injection part 17 is provided, and the 2nd neutralizer which connects the common line 5 to the neutralizer injection part 27 similarly. A line 24 is provided. Thus, since the injection part 28 is divided into the bactericide injection part 17 and the neutralizing agent injection part 27, it becomes possible to provide each injection part at the optimum position in the drainage system 31 respectively. . Here, as long as the disinfectant injection part 17 is provided in the middle of the first ballast water line 33, it may be provided at any position between the sea chest 32 and the ballast tank 4. Further, the position where the neutralizing agent injection portion 27 is provided is from the ballast tank 4 through the drainage line 36, then through the first ballast water line 33, and further through the second ballast water line 34, for example, a drain port such as a sea chest 32 or the like. (As long as it drains the ballast water W, it may be a drain outlet other than the sea chest 32). The injection unit 28 is a single injection unit, and may function as the sterilizing agent injection unit 17 and also as the neutralizing agent injection unit 27. In this case, it is not necessary to provide the second disinfectant line 14 and the second neutralizer line 24, and a simpler configuration can be achieved.

  The ballast water treatment system 1 is installed across the engine room 2 and the pump room 3. An upstream side of the injection system 11 is installed on the engine room 2 side, and a downstream side of the injection system 11 and a soot drainage system 31 are installed on the pump chamber 3 side. In the injection system 11, at least the sterilizing agent tank 12 and the neutralizing agent tank 22 are provided on the engine room 2 side, and at least the sterilizing agent injecting portion 17 and the neutralizing agent injecting portion 27 are provided on the pump chamber 3 side. It has been. Further, the common line 5 is provided so as to pass through the through portion 8 provided in the partition wall 7 between the engine chamber 2 and the pump chamber 3. In the present embodiment, the common pump 6 is installed on the engine room 2 side, but may be installed on the pump chamber 3 side as long as it is in the middle of the common line 5.

  2 and 3, each line of the ballast water treatment system 1 is provided with a valve. As long as the position where the valve is provided can be controlled in the injection system 11 when only the bactericide R is circulated and when only the neutralizer N is circulated, the specific valve arrangement is not particularly limited. Similarly, in the dredging drainage system 31, the ballast water W can flow from the sea chest 32 to the ballast tank 4 during flooding, and the drainage port (for example, the ballast water W is discharged from the ballast tank 4 during drainage). The arrangement of the specific valve is not particularly limited as long as it can flow the ballast water W to a drain outlet other than the sea chest 32 as long as it drains. In the present embodiment, in the injection system 11, the first sterilizing agent valve 15 is provided in the first sterilizing agent line 13, and the first neutralizing agent valve 25 is provided in the first neutralizing agent line 23. It has been. A second bactericidal valve 16 is provided in the second bactericidal line 14, and a second neutralizing agent valve 26 is provided in the second neutralizing agent line 24. Further, in the dredging drainage system 31, a first ballast water valve 37 and a second ballast water valve 38 are provided in the first ballast water line 33, and a third ballast water valve 39 is provided in the second ballast water line 34. Is provided.

  Then, operation | movement of the ballast water treatment system 1 mentioned above is demonstrated.

  At the time of flooding, the first ballast water valve 37 and the second ballast water valve 38 are opened, the third ballast water valve 39 is closed, and the ballast water pump 40 is driven. Thereby, seawater flows in from the sea chest 32 as the ballast water W, flows through the first ballast water line 33, and enters the ballast tank 4 (arrow A1). On the other hand, when draining, the first ballast water valve 37 is closed, the second ballast water valve 38 and the third ballast water valve 39 are opened, and the ballast water pump 40 is driven. Thereby, the ballast water W stored in the ballast tank 4 flows from the drainage line 36 to the first ballast water line 33, and then flows to the second ballast water line 34, for example, drainage of the sea chest 32 or the like. Water is drained from the mouth (if it drains the ballast water W, it may be a drain port other than the sea chest 32) (arrow A2).

  Here, in the conventional ballast water treatment system 51, at the time of flooding, as shown in FIG. 6, the disinfectant R is caused to flow downstream from the disinfectant tank 62 through the disinfectant line 63 by the disinfectant pump 67 and into the ballast water W. Injected (arrow A5). On the other hand, at the time of drainage, as shown in FIG. 7, the neutralizing agent N is caused to flow downstream from the neutralizing agent tank 72 through the neutralizing agent line 73 by the neutralizing agent pump 77 and injected into the ballast water W (arrow A6). . Thus, the bactericidal line 63 is provided exclusively for the distribution of the bactericidal agent R, and the neutralizing agent line 73 is provided exclusively for the distribution of the neutralizing agent N. Therefore, the disinfectant line 63 and the neutralizer line 73 are used only during flooding and drainage, respectively. The sterilizing agent pump 67 is provided only for flowing the sterilizing agent R, and the neutralizing agent pump 77 is provided only for flowing the neutralizing agent N. Further, the partition wall 7 that partitions the engine room 2 and the pump chamber 3 includes a sterilant line penetration part 68 through which the sterilant line 63 penetrates and a neutralizer line penetration part through which the neutralizer line 73 penetrates. 78 is provided.

  In contrast, the ballast water treatment system 1 according to the present invention opens the first sterilizing agent valve 15 and the second sterilizing agent valve 16 as shown in FIG. 25 and the second neutralizing agent valve 26 are closed, and the common pump 6 is driven. As a result, the sterilizer R flows from the sterilizer tank 12 through the first sterilizer line 13, flows through the junction 9 to the common line 5, and further flows through the branch 10 to the second sterilizer line 14. It reaches the bactericide injection part 17 (arrow A3). Therefore, since the ballast water W is injected with the bactericide R when passing through the bactericide injection part 17, the ballast water W submerged in the ballast tank 4 is in a state where microorganisms in water are sterilized by the bactericide R. It becomes.

  On the other hand, when draining, as shown in FIG. 3, the first sterilant valve 15 and the second sterilizer valve 16 are closed, the first neutralizer valve 25 and the second neutralizer valve 26 are opened, The common pump 6 is driven. Thus, the neutralizing agent N flows from the neutralizing agent tank 22 through the first neutralizing agent line 23, flows through the junction 9 to the common line 5, and further passes through the branching portion 10 to the second neutralizing agent line. 24 and reaches the neutralizing agent injection section 27 (arrow A4). Therefore, although the bactericidal agent R may remain in the ballast water W, since the neutralizing agent N is injected when passing through the neutralizing agent injecting portion 27, the ballast water W drained into the sea. Is neutralized by the bactericidal agent R.

  Even if the disinfectant R is stopped after the disinfectant R has been distributed through the common line 5, the disinfectant R remains inside the common line 5. Thereafter, when the neutralizing agent N is circulated through the common line 5, the disinfectant R remaining inside the common line 5 and the newly circulated neutralizing agent N are mixed. However, even if the bactericidal agent R and the neutralizing agent N are mixed, there is no particular harm because the bactericide R is only neutralized. In addition, a part of the newly distributed neutralizing agent N is used for neutralizing the remaining fungicide R. However, since the total amount of the sterilizing agent R remaining in the common line 5 is very small compared to the total amount of the neutralizing agent N injected into the ballast water W, the performance of sterilization and neutralization decreases due to the common use of the line. Is negligible.

  FIG. 4 is a diagram schematically showing a state in which the disinfectant leaks from the common line. FIG. 5 is a diagram schematically showing a state in which the leaked bactericidal agent is neutralized with a neutralizing agent. As shown in FIGS. 4 and 5, in the ballast water treatment system 1 according to the present invention, the leaked germicide R can be quickly neutralized even if the common line 5 is damaged during flooding. That is, when the germicide R leaks, the valves are opened and closed as described above so that the neutralizer N can flow through the common line 5. Thereby, since the neutralizing agent N leaks from the damaged part C of the common line 5, the neutralizing agent N is mixed with the disinfectant R outside the common line 5. Therefore, the leaked disinfectant R can be quickly neutralized. Furthermore, for example, even if the leak of the bactericidal agent R is very small, even if the discovery of the leak is delayed, the neutralizing agent N leaks from the same damaged portion C when the ballast water W is drained, so it is automatically sterilized. Agent R is neutralized. Therefore, it is possible to prevent the contamination from spreading to the periphery before the discovery of the leakage of the bactericide R.

  The means for neutralizing the sterilizing agent R leaked in this way is, for example, by installing a flow sensor of the sterilizing agent R in the upstream and downstream portions of the common line 5 to automatically detect the leakage of the sterilizing agent R and to detect the leakage. If detected, each valve can be automatically opened and closed by a solenoid valve. In this case, the leaked germicide R can be neutralized reliably and more quickly.

  As described above, in the ballast water treatment system 1, in the line through which the bactericidal agent R and the neutralizing agent N circulate, the bactericidal agent R and the medium are disposed upstream of the bactericidal agent injecting portion 17 and the neutralizing agent injecting portion 27. A common line 5 through which the additive N flows in common is provided. Thereby, in order to distribute the bactericidal agent R to the common line 5 at the time of flooding and to distribute the neutralizing agent N to the common line 5 at the time of drainage, it is necessary to provide the line of the bactericidal agent R and the line of the neutralizing agent N separately. There is no. For this reason, the ballast water treatment system 1 can have a simple configuration. Further, since the amount of the member used is reduced, the cost can be reduced. In addition, even if the germicide R leaks from the common line 5, the leaked germicide R can be quickly neutralized simply by circulating the neutralizer N through the common line 5, thus improving safety. Become.

  In the ballast water treatment system 1, the reactant is a sterilizer R that sterilizes the ballast water W. The sterilizer R is injected into the ballast water W when the ballast water W is submerged in the ship 100. The neutralizing agent N is injected into the ballast water W when the ballast water W is drained from the ship 100. In this case, the microorganisms contained in the seawater taken in as the ballast water W can be sterilized efficiently.

  The ballast water treatment system 1 further includes a sterilizing agent tank 12 and a neutralizing agent tank 22 provided on the upstream side of the common line 5, and includes the sterilizing agent tank 12, the neutralizing agent tank 22, the sterilizing agent injecting unit 17, and the like. The neutralizing agent injection part 27 is arranged in the engine room 2 and the pump room 3 partitioned by the partition wall 7. The common line 5 is provided through the partition wall 7. In this case, since the penetration part 8 provided in the partition wall 7 is only one place for allowing the common line 5 to penetrate, the manufacture becomes easy.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the bactericide R is exemplified as the reactant injected into the ballast water W. However, the present invention specifically includes a hypochlorous acid aqueous solution (hypochlorous acid compound is dissolved in clean water as the reactant). Substances), ozone gas (or ozone gas in water), carbon dioxide (carbon dioxide in water), or an active substance generated by electrolyzing seawater or fresh water, Specifically, sodium hypochlorite or sodium sulfite can be commonly used as the substance (neutralizing agent) for neutralizing the substance. In this case, the ballast water W can be treated by appropriately selecting the optimum reactant and neutralizing agent from the above substances according to the substances and microorganisms contained in the seawater taken in as the ballast water W.

  Moreover, in the said embodiment, the 1st disinfectant line 13 which installed the 1st disinfectant valve | bulb 15 and the 1st neutralizer line 23 which installed the 1st neutralizer valve | bulb 25 are downstream. The structure which joins in the provided junction 9 was illustrated. However, the present invention may be configured such that a three-way valve is provided at the junction 9 instead of the first sterilizing valve 15 and the first neutralizing valve 25. In this case, the number of parts can be reduced, and the ballast water treatment system 1 can be further simplified.

  Moreover, in the said embodiment, each valve which comprises the ballast water treatment system 1 may be opened and closed manually or may be opened and closed by an electromagnetic valve or the like. If the opening and closing is performed manually, the cost can be reduced. On the other hand, if the solenoid valve is used for opening and closing, the valve can be opened and closed quickly and easily.

  Here, in the said embodiment, the tanker is illustrated as the ship 100. FIG. In a ship carrying a flammable material such as a petroleum-based liquid cargo like a tanker, a section adjacent to the cargo space is an explosion-proof area. In the explosion-proof area, for the sake of safety, it is possible to avoid installing the bactericide tank 12 and the neutralizer tank 22 equipped with non-explosion-proof electrical products.

  In the said embodiment, the ballast water treatment system 1 is installed ranging over the pump room 3 which is an explosion-proof area, and the engine room 2 which is a non-explosion-proof area, and disinfects the disinfectant tank 12 and the neutralizer tank 22 in a non-explosion-proof area. The structure which ensures safety | security by arrange | positioning in the engine room 2 which is is disclosed. However, in the present invention, the disinfectant tank 12 and the neutralizer tank 22 may be installed in a compartment further rearward than the engine room 2. That is, in a ship in which a compartment such as a rudder room is provided behind the engine room 2, the disinfectant tank 12 and the neutralizing agent tank 22 can be installed in the rudder room that is a non-explosion-proof area. In this case, since the optimal layout according to the structure of the ship can be selected, the degree of freedom in layout is increased.

  Moreover, it becomes possible to install the sterilant tank 12 and the neutralizing agent tank 22 in the explosion-proof area by subjecting the sterilizing agent tank 12 and the neutralizing agent tank 22 equipped with non-explosion-proof electrical products to an explosion-proof process. . Also in this case, the degree of freedom in layout is increased.

  Furthermore, in the above embodiment, a tanker is exemplified as the ship 100. However, the present invention can be applied to any ship having a ballast tank 4, and is applied to, for example, a bulk carrier. Also good. In this case, the above-described explosion-proof area does not exist because the bulk carrier does not carry petroleum-based liquid cargo such as crude oil or liquefied natural gas. Accordingly, the ballast water treatment system 1 can be freely laid out without subjecting the sterilizer tank 12 and the neutralizer tank 22 to explosion-proof treatment.

  DESCRIPTION OF SYMBOLS 1 ... Ballast water treatment system, 2 ... Engine room (compartment), 3 ... Pump room (compartment), 5 ... Common line, 7 ... Bulkhead, 12 ... Sterilizer tank, 17 ... Sterilizer injection part, 22 ... Neutralizer Tank, 27 ... Neutralizing agent injection part, 28 ... Injection part, 29 ... Tank, 100 ... Ship, N ... Neutralizing agent, R ... Disinfectant (reactant), W ... Ballast water.

Claims (2)

A ballast water treatment system for injecting a reactive agent into the ballast water of a ship and injecting a neutralizing agent to neutralize the reactive agent into the ballast water,
An injection part for injecting the reactant and the neutralizing agent into the ballast water;
Provided on the upstream side of the injection section, and a common line through which the reactant and the neutralizing agent are commonly circulated,
The common line has a common pump for flowing the reactant and the neutralizer in common,
A ballast water treatment system, wherein a sensor for detecting leakage of the reactant is installed in the common line. A ballast water treatment system for injecting a reactive agent into the ballast water of a ship and injecting a neutralizing agent to neutralize the reactive agent into the ballast water,
An injection part for injecting the reactant and the neutralizing agent into the ballast water;
Provided on the upstream side of the injection section, and a common line through which the reactant and the neutralizing agent are commonly circulated,
A sensor for detecting leakage of the reactant is installed in the common line,
Provided further upstream from the common line, further comprising a tank for storing the reactant and a tank for storing the neutralizing agent ;
A tank for the storage tank and the neutralizing agent for storing the reactants that are located in the same compartment, and said injection portion, are arranged in different compartments partitioned by the partition wall,
The common line, features and to Luba last water treatment system that is provided through said partition wall.

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