JP2023106751A - vessel - Google Patents

Abstract

To provide a vessel capable of reducing influence imparted to crew when ammonia is leaked.SOLUTION: A vessel 1 includes: an ammonia tank 31 for retaining ammonia; and space 50 where a crew may enter. Therefore, when ammonia is leaked from the ammonia tank 31, the leaked ammonia becomes gas and may intrude into the space 50 where the crew may enter. To prevent the intrusion, the vessel 1 includes an intrusion control unit 70 for controlling intrusion of the ammonia gas into the space 50. Therefore, even when ammonia is leaked, ammonia gas is suppressed from intruding into the space where the crew may enter.SELECTED DRAWING: Figure 2

Description

The present invention relates to ships.

2. Description of the Related Art Conventionally, ships having a structure for preventing leakage of ammonia water are known (for example, Patent Literature 1). In this ship, the ammonia storage tank has a double structure to prevent ammonia leakage.

JP 2012-82796 A

However, in the ship described above, measures against ammonia leakage were not sufficient. When ammonia leaks, it is necessary to take measures so that it does not become ammonia gas and affect the crew.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and an object of the present invention is to provide a ship capable of reducing the impact on the crew when ammonia leaks.

A ship according to the present invention includes an ammonia holding section that holds ammonia, a space into which a crew member can enter, and an intrusion suppressing section that suppresses ammonia gas from entering the space.

A ship according to the present invention includes an ammonia holding section that holds ammonia and a space into which a crew member can enter. Therefore, when ammonia leaks from the ammonia holding portion, the leaked ammonia may turn into gas and enter a space where a passenger can enter. In contrast, the ship is equipped with an intrusion suppressing section that suppresses the intrusion of ammonia gas into the space. Therefore, even if ammonia leaks, it is possible to prevent the ammonia gas from entering the space where the passenger can enter. As described above, it is possible to reduce the impact on the occupants when ammonia leaks.

The space may be at least one of a crew living quarters, bosun store, steering gear room, pump room, cargo handling gear locker. The intrusion suppression unit suppresses the entry of ammonia gas into at least one of a living area with many passengers, a bosun store where the passengers may exist, a steering gear room, and a pump room, thereby reducing the impact on the passengers. can be done.

The intrusion suppression unit may have at least one of a detection unit that detects ammonia gas and a prediction unit that predicts intrusion of ammonia gas. In this case, the intrusion suppression unit can suppress intrusion of ammonia gas at the timing when ammonia leaks.

The intrusion suppression unit may suppress intrusion of the ammonia gas by contacting the fluid with the ammonia gas. In this case, the intrusion suppressing part can efficiently suppress the intrusion of ammonia by utilizing the property that ammonia easily dissolves in the fluid.

The fluid is water, and the intrusion of the ammonia gas may be suppressed by bringing the water and the ammonia gas into contact with each other and containing the water. In this case, the intrusion suppressing part can efficiently suppress the intrusion of ammonia by utilizing the property that ammonia is easily dissolved in water.

ADVANTAGE OF THE INVENTION According to this invention, the ship which can reduce the influence on a crew when ammonia leaks can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which shows an example of the ship which concerns on embodiment of this invention. 4 is a schematic configuration diagram of an intrusion suppressing unit; FIG. It is a schematic diagram showing a fluid supply mechanism provided in the living quarters. Fig. 2 is a schematic side view of a blind for forming a water curtain;

Preferred embodiments of the gas processing system of the present invention will be described below with reference to the drawings. In the following explanation, the terms "front" and "rear" correspond to the direction of travel of the hull, and the term "lateral" corresponds to the lateral (width) direction of the hull. The term "bottom" corresponds to the vertical direction of the hull.

FIG. 1 is a schematic cross-sectional view showing an example of a ship according to an embodiment of the invention. The ship 1 is, for example, a ship that transports petroleum-based liquid cargo such as crude oil and liquid gas, and is, for example, an oil tanker. Note that the vessel is not limited to an oil tanker, and may be, for example, a bulk carrier or other various types of vessels.

The ship 1 includes a hull 11 and a propeller 12, as shown in FIG. The hull 11 has a bow section 2 , a stern section 3 , an engine room 4 , a pump room 5 and a cargo room 6 . A deck 19 is provided on the top of the hull 11 (or inside the ship). The bow section 2 is located on the front side of the hull 11 . The stern portion 3 is positioned on the rear side of the hull 11 . The bow 2 has a shape designed to reduce wave-making resistance in, for example, a full draft. The bow section 2 has a bosun store 2a on the upper side. The stern part 3 has a steering gear room 3a on the upper side. The propulsion device 12 propels the hull 11, and uses, for example, a screw shaft. The propeller 12 is installed below the waterline (water surface of the sea W) in the stern portion 3 . A rudder 15 for adjusting the direction of propulsion is installed below the waterline in the stern portion 3 . In addition, the propeller 12 and the rudder 15 are not necessarily installed below the waterline, and are raised above the waterline in the ballast state.

The engine room 4 is provided at a position adjacent to the bow side of the stern portion 3 . The engine room 4 is a section for arranging an engine 16 for applying driving force to the propeller 12 . On the deck 19, above the engine room 4, a living space 33 and an exhaust chimney 34 are provided. The pump room 5 is provided at a position adjacent to the engine room 4 on the bow side. The pump room 5 is a section in which the pump 17 and the like are arranged. A cargo compartment 6 is provided between the bow section 2 and the pump room 5 . Cargo compartment 6 is a compartment for containing petroleum-based cargo. The cargo compartment 6 is divided into a cargo oil tank 26 and a ballast tank 27 by adopting a double hull structure of an outer plate 20 and an inner bottom plate 21 . The cargo oil tank 26 loads petroleum-based cargo carried by the vessel 1 . The ballast tank 27 accommodates an amount of ballast water according to the size of the ship.

The deck 19 is provided with an ammonia tank 31 (ammonia storage section) that stores ammonia. Ammonia in a liquid state is stored in the ammonia tank 31 . In FIG. 1 , an ammonia tank 31 is provided forward of the pump room 5 , and an ammonia tank 31 is also provided above the stern portion 3 . Note that the number of ammonia tanks 31 is not particularly limited.

Here, the ship 1 has a space 50 into which the crew can enter. In the ship 1 having the ammonia tank 31, ammonia gas may enter such a space 50. On the other hand, the ship 1 can suppress the ammonia gas from entering the space 50 . Such spaces 50 include the living quarters 33, the bosun store 2a, the steering gear room 3a, the pump room 5, and the cargo handling gear lockers 64. The bosun store 2a is a room for storing mooring ropes. The cargo handling gear locker 64 is a locker for storing equipment when handling cargo. For example, when the oil in the cargo oil tank 26 is connected to the piping of the ship 1 and the piping of the land, it may be used as a room for storing a manifold for adjusting the diameter.

These spaces 50 have locations into which ammonia gas is likely to enter, and these locations correspond to inlets 51 that prevent ammonia gas from entering. A fresh air intake 60 corresponds to the entrance 51 to the accommodation space 33 . Although there is a possibility that the ammonia gas will enter the living quarters 33 through the doors, it will not enter through the doors because the living quarters 33 themselves have a positive pressure. Also, since the windows are all inset, ammonia gas cannot enter through the windows. Although the accommodation area 33 has natural ventilation, the ammonia gas does not enter because the accommodation area 33 itself has a positive pressure. On the other hand, since the fresh air intake 60 is an inlet for taking fresh air into the living space 33, it easily takes in ammonia together with outside air.

The entry port 51 for the bosun store 2a corresponds to the inlet 61 and vent hole of the bosun store 2a. The inlet 51 to the steering gear room 3a corresponds to the inlet 62 and the ventilation hole of the steering gear room 3a. The entrance 51 to the pump room 5 corresponds to the pump room entrance 63 and the ventilation holes. The pump room entrance 63 is a doorway for entering and exiting the pump room 5 . When going to the pump room 5, the worker descends from the pump room entrance 63 on the upper deck 19 by a ladder. The entrance 51 to the cargo handling gear locker 64 corresponds to the entrance of the cargo handling gear locker 64 and the ventilation hole.

Next, with reference to FIG. 2, the entry suppressing portion 70 that suppresses entry of ammonia gas into the space 50 will be described. As shown in FIG. 2 , the intrusion suppression unit 70 includes a fluid supply mechanism 71 , a detection unit 72 , a prediction unit 73 and a control unit 74 . The fluid supply mechanism 71 prevents ammonia gas from entering through the inlet 51 by supplying the fluid through the inlet 51 . The fluid supply mechanism 71 includes a nozzle 76 , a flow path 77 and a supply section 78 .

In addition, such an intrusion suppressing unit 70 includes a fresh air intake 60 as an inlet 51, an entrance 61 of the bosun store 2a, an entrance 62 of the steering gear room 3a, a pump room entrance 63, and a cargo handling gear locker. 64 may be provided.

Nozzle 76 supplies fluid to inlet 51 . The flow path 77 connects the supply portion 78 and the nozzle 76 and circulates the fluid to the nozzle 76 . The supply portion 78 supplies fluid to the nozzle 76 via the flow path 77 .

FIG. 3 is a schematic diagram showing how the fluid supply mechanism 71 is provided for the fresh air intake 60 of the accommodation space 33. As shown in FIG. As shown in FIG. 3, a channel 77 is wound along the outer wall of the living quarters 33 and extends to the location of the fresh air intake 60 . The flow path 77 extends from a pump (supply portion 78) not shown. A pump for supplying water to the residential area may be used as the pump serving as the supply unit 78 . A nozzle 76 is arranged on top of the fresh air intake 60 and supplies fluid to cover the inlet of the fresh air intake 60 .

Here, the nozzle 76 may supply water as the fluid. In this case, the intrusion suppression unit 70 suppresses intrusion of ammonia by bringing the water and ammonia into contact with each other and causing the water to contain the ammonia. The nozzles 76 spread the water to form a water curtain over the inlet 51 . The fluid supply mechanism 71 may form a water curtain by spraying water in a diffused manner or by arranging a plurality of nozzles 76 in parallel. Alternatively, the fluid supply mechanism 71 may form a water curtain by providing a member at the inlet 51 .

Specifically, as shown in FIG. 4 , a blind 81 that covers the inlet 51 may be formed by vertically arranging a plurality of horizontally extending plate-like members 80 below the nozzle 76 . The plate-like member 80 is inclined in the front-rear direction to guide downward the water WT that has fallen from above. As a result, the water WT forms a film of water WT on the front side of the blind 81 by flowing downward along each plate member 80 of the blind 81 . Ammonia gas entering from the inlet 51 tries to pass through the gap between the plate members 80 in the blind 81 . At this time, the ammonia gas contacts the water WT flowing between the plate-like members 80 . As a result, the ammonia dissolves in the water WT and flows downward along the blind 81 . A box for storing water WT in which ammonia is dissolved may be arranged below the blind 81 . Alternatively, the water WT in which ammonia is dissolved may flow out of the inlet 51 as it is.

Note that the fluid supplied by the nozzle 76 is not limited to water. The nozzle 76 may blow off the ammonia gas trying to enter from the entry port 51 by injecting air.

The detection unit 72 is a sensor that detects ammonia. The detection unit 72 is configured by, for example, a concentration sensor that detects the concentration of ammonia. The detection unit 72 is arranged at the inlet 51 and detects ammonia at the timing when the ammonia gas is about to enter the inlet 51 . The detector 72 outputs a detection signal to the controller 74 .

The prediction unit 73 is a system that predicts the intrusion of ammonia gas. As the prediction unit 73, for example, an IAS (Integrated Automation System) capable of grasping leakage of ammonia may be employed. The prediction section 73 outputs the prediction result to the control section 74 . The position of the prediction unit 73 is not particularly limited.

The control unit 74 is a device that controls the intrusion suppression unit 70 . The control unit 74 supplies the fluid to the inlet 51 by the fluid supply mechanism 71 at the timing when the detecting unit 72 detects the ammonia gas or at the timing when the predicting unit 73 predicts that the ammonia gas will enter. Controller 74 may automatically dispense fluid by sending a control signal to dispense portion 78 . Alternatively, the control unit 74 may output a warning to the occupant to guide the occupant to manually operate the supply unit 78 to supply the fluid.

Both the detection unit 72 and the prediction unit 73 need not be provided, and at least one of them may be provided.

Next, actions and effects of the ship 1 according to this embodiment will be described.

A ship 1 according to this embodiment includes an ammonia tank 31 that holds ammonia, and a space 50 into which a crew member can enter. Therefore, when ammonia leaks from the ammonia tank 31, the leaked ammonia may turn into gas and enter the space 50 where the passenger can enter. On the other hand, the ship 1 includes an intrusion suppressing section 70 that suppresses intrusion of the ammonia gas into the space 50 . Therefore, even if ammonia leaks, it is possible to prevent the ammonia gas from entering the space where the passenger can enter. As described above, it is possible to reduce the impact on the occupants when ammonia leaks.

Space 50 may be at least one of crew living quarters 33 , bosun store 2 a , steering gear room 3 a , pump room 5 , cargo handling gear lockers 64 . The intrusion suppression unit 70 suppresses entry of the ammonia gas into at least one of the accommodation space 33 with many passengers, the bosun store 2a where the passengers may exist, the steering gear room 3a, the pump room 5, and the cargo handling gear locker 64. By doing so, it is possible to reduce the influence on the occupants.

The intrusion suppression unit 70 may have at least one of a detection unit 72 that detects ammonia gas and a prediction unit 73 that predicts intrusion of ammonia gas. In this case, the intrusion suppression unit 70 can suppress intrusion of ammonia gas at the timing when ammonia leaks.

The intrusion suppression unit 70 may suppress intrusion of the ammonia gas by bringing the fluid into contact with the ammonia gas. In this case, the intrusion suppression unit 70 can efficiently suppress the intrusion of ammonia by utilizing the property that ammonia easily dissolves in the fluid.

The fluid is water, and the intrusion of the ammonia gas may be suppressed by bringing the water and the ammonia gas into contact with each other and containing the water. In this case, the intrusion suppression unit 70 can efficiently suppress the intrusion of ammonia by utilizing the property that ammonia easily dissolves in water.

The invention is not limited to the embodiments described above.

The structure of the ship 1 shown in FIG. 1 is merely an example, and may be changed as appropriate. In this case, when the position of the entrance 51 inside the ship 1 is changed, the position where the intrusion suppressor 70 is provided may also be changed accordingly.

DESCRIPTION OF SYMBOLS 1... Ship, 31... Ammonia tank (ammonia holding|maintenance part), 33... Accommodation area, 50... Space, 51... Entrance, 70... Intrusion suppression part, 72... Detection part, 73... Prediction part.

Claims (5)

an ammonia holding unit that holds ammonia;
space for passengers and
and an intrusion suppression unit that suppresses intrusion of ammonia gas into the space. 2. The marine vessel of claim 1, wherein said space is at least one of a living quarter in which said crew resides, a bosun store, a steering gear room, a pump room, a cargo handling gear locker. The vessel according to claim 1 or 2, wherein the intrusion suppressing unit has at least one of a detecting unit that detects the ammonia gas and a predicting unit that predicts intrusion of the ammonia gas. The ship according to any one of claims 1 to 3, wherein the intrusion suppressing portion suppresses intrusion of the ammonia gas by contacting the fluid with the ammonia gas. 5. The vessel according to claim 4, wherein the fluid is water, and the water and the ammonia gas are brought into contact with each other to contain the water, thereby suppressing the entry of the ammonia gas.

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