Ammonia recovery systems and vessels

Abstract

An ammonia recovery system according to the present invention comprises a first storage unit that is provided to a ship and stores water, a spraying unit that sprays spray water at a compartment in which there is ammonia among one or more compartments provided in the ship, a second storage unit that recovers and stores ammonia water produced by dissolution of ammonia in the spray water sprayed at the compartment in which there is ammonia, piping that allows the ammonia water to flow from the second storage unit to the first storage unit, and a valve that is provided on the piping.

Description

Technical Field

[0001] The present disclosure relates to an ammonia recovery system and a ship.

Background Art

[0002] Patent Document 1 discloses a ship comprising: a compartment that accommodates ammonia-related equipment; a duct having a first opening and a second opening each communicating with the compartment; and a circulation fan that blows air from the first opening toward the second opening of the duct. Patent Document 1 discloses that the ship is provided with an ammonia removal unit provided in the middle of the duct, the ammonia removal unit being capable of removing ammonia contained in air inside the compartment blown by the circulation fan.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] When discharging water having recovered ammonia out of a ship, it is necessary to dilute the aqueous ammonia to a predetermined concentration before discharging the same.

[0005] The present disclosure provides a technique for diluting aqueous ammonia containing recovered ammonia after ammonia is recovered in a ship.

Means for Solving the Problem

[0006] This disclosure provides an ammonia recovery system comprising: a first storage unit provided on a ship for storing water; a spraying unit for spraying spray water into one or more compartments provided on the ship where ammonia is present; a second storage unit for recovering and storing ammonia water in which ammonia has been dissolved in the spraying water sprayed into the compartments where ammonia is present; piping for flowing the ammonia water from the second storage unit to the first storage unit; and a valve disposed in the piping. [Effects of the Invention]

[0007] According to the ammonia recovery system described herein, the ammonia water containing the recovered ammonia can be diluted. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a diagram showing the schematic configuration of a vessel equipped with an ammonia recovery system according to the first embodiment. [Figure 2] Figure 2 shows a schematic configuration of the ammonia recovery system according to the first embodiment. [Figure 3] Figure 3 shows a schematic configuration of the spraying section in the ammonia recovery system according to the first embodiment. [Figure 4] Figure 4 is a diagram showing the schematic configuration of the storage section in the ammonia recovery system according to the first embodiment. [Figure 5] Figure 5 shows a schematic configuration of the ammonia recovery system according to the second embodiment. [Modes for carrying out the invention]

[0009] The embodiments will be described below with reference to the attached drawings. Note that, in the description and drawings of each embodiment, components having substantially the same or corresponding functional configurations may be denoted by the same reference numerals, thereby omitting redundant explanations. Furthermore, for ease of understanding, the scale of each part in the drawings may differ from that of the actual parts.

[0010] ≪Ammonia Recovery System According to the First Embodiment≫ The ammonia recovery system according to the first embodiment will now be described. The ammonia recovery system according to the first embodiment comprises a first storage unit installed on a ship where water is stored, and a spraying unit that sprays spraying water into one or more compartments on the ship where ammonia is present. The ammonia recovery system according to the first embodiment also comprises a second storage unit in which ammonia water, in which ammonia dissolved in the spraying water sprayed into the compartments where ammonia is present, is recovered and stored. Furthermore, the ammonia recovery system according to the first embodiment also comprises piping for flowing ammonia water from the second storage unit to the first storage unit, and a valve arranged in the piping.

[0011] The ammonia recovery system according to the first embodiment will be described with reference to the figures. Figure 1 is a diagram showing the schematic configuration of a ship 1 equipped with an ammonia recovery system 100, which is an example of the ammonia recovery system according to the first embodiment. Figure 2 is a diagram showing the schematic configuration of the ammonia recovery system 100, which is an example of the ammonia recovery system according to the first embodiment. Figure 3 is a diagram showing the schematic configuration of the spraying unit 70 in the ammonia recovery system 100, which is an example of the ammonia recovery system according to the first embodiment. Figure 4 is a diagram showing the schematic configurations of the ammonia water drain tank 22 and the ammonia water dilution tank 23, which are storage units in the ammonia recovery system 100, which is an example of the ammonia recovery system according to the first embodiment.

[0012] The vessel 1 comprises an engine room 10, a plant room 20, a bunker station 30, and a shower station 40. The vessel 1 also comprises a duct 50 that exhausts from a double pipe 12 in the engine room 10 to an exhaust bend 80, and a duct 60 that exhausts from the plant room 20 to the exhaust bend 80. Furthermore, the vessel 1 comprises a spraying unit 70 that sprays spray water.

[0013] Ship 1 is equipped with, for example, an ammonia recovery system 100 to recover leaked ammonia. Since ammonia is harmful to the human body, it is necessary to recover ammonia quickly if it leaks. The ammonia recovery system 100 recovers leaked ammonia by spraying spray water into the area where ammonia is present, thereby converting it into ammonia water.

[0014] The ammonia recovery system 100 includes an ammonia water drain tank 22, a spraying unit 70, an ammonia water dilution tank 23, piping 25 connecting the ammonia water drain tank 22 and the ammonia water dilution tank 23, and a valve 24 located in the piping 25. The ammonia recovery system 100 recovers ammonia water from the tank connection space 21, the bunker station 30, the shower station 40, the duct 50, and the duct 60, respectively.

[0015] [Engine Room 10] The engine room 10 is a room where the engine 11 for propelling the ship 1 is installed. The engine 11 is an engine that operates on ammonia as fuel. The engine 11 rotates the propeller 11a located at the stern of the ship 1. The rotation of the propeller 11a causes the ship 1 to sail.

[0016] Engine 11 is supplied with ammonia fuel via a double-walled pipe 12. The double-walled pipe 12 comprises an inner pipe and an outer pipe. The inner pipe is located inside the outer pipe. Ammonia fuel flows through the inner pipe. The outer pipe is connected to a duct 50. For example, if ammonia leaks from the inner pipe to the outer pipe, the leaked ammonia is exhausted to the outside of the engine room through the duct 50. As will be described later, in the duct 50, ammonia is recovered by spraying water from a nozzle 50n.

[0017] In the ship 1 described herein, the engine 11 is exemplified as a facility that operates using ammonia as fuel, but facilities that operate using ammonia as fuel are not limited to engines. For example, a facility that operates using ammonia as fuel may be a generator or a boiler.

[0018] [Plant Room 20] The plant room 20 is a room that performs adjustment and processing of fuel and the like supplied to the engine 11. The ship 1 includes, in the plant room 20, an ammonia water drain tank 22 as an example of a second storage part, an ammonia water dilution tank 23 as an example of a first storage part, and an ammonia tank 27.

[0019] (Ammonia Water Drain Tank 22) The ammonia water drain tank 22 is a tank that recovers aqueous ammonia generated when spray water is sprayed onto leaked ammonia. The ammonia water drain tank 22 stores high-concentration aqueous ammonia.

[0020] The ammonia water drain tank 22 is formed of, for example, an ammonia corrosion resistant material. The ammonia corrosion resistant material is, for example, stainless steel such as SUS304 and SUS316L. Further, the ammonia water drain tank 22 may be provided with a layer formed of an ammonia corrosion resistant material on the inner surface of the interior where aqueous ammonia is stored. By providing the layer formed of the ammonia corrosion resistant material on the inner surface, the main body of the ammonia water drain tank 22 can be formed of an inexpensive material.

[0021] The ammonia water drain tank 22 recovers ammonia water from the tank connection space 21, bunker station 30, shower station 40, duct 50, and duct 60. The vessel 1 is equipped with a check valve 21v in the piping connecting the ammonia water drain tank 22 and the tank connection space 21. The vessel 1 is equipped with a check valve 30v in the piping connecting the ammonia water drain tank 22 and the bunker station 30. The vessel 1 is equipped with a check valve 40v in the piping connecting the ammonia water drain tank 22 and the shower station 40. The vessel 1 is equipped with a check valve 50v in the piping connecting the ammonia water drain tank 22 and the duct 50. The vessel 1 is also equipped with a check valve 60v in the piping connecting the ammonia water drain tank 22 and the duct 60.

[0022] By equipping the vessel 1 with check valves 21v, 30v, 40v, 50v, and 60v, it is possible to prevent ammonia water from flowing back from the ammonia water drain tank 22. Furthermore, by equipping the vessel 1 with check valves 21v, 30v, 40v, 50v, and 60v, it is possible to prevent vaporized ammonia from flowing back from the ammonia water drain tank 22.

[0023] As shown in Figure 4, the ammonia water drain tank 22 is connected to the ammonia water dilution tank 23 via piping 25. Piping 25 carries the ammonia water stored in the ammonia water drain tank 22 to the ammonia water dilution tank 23. The ship 1 is equipped with a valve 24 in piping 25. The valve 24 may be a manual valve or an automatic valve that opens and closes by pressure or gravity. Alternatively, as shown in Figure 4, the valve 24 may be a control valve controlled by a control unit 29 installed on the ship 1.

[0024] For example, when the ammonia water drain tank 22 is filled with recovered ammonia water, a worker operates valve 24 to open it, allowing the ammonia water stored in the ammonia water drain tank 22 to flow into the ammonia water dilution tank 23. Alternatively, by using an automatic valve as valve 24, valve 24 is opened when the amount of ammonia water stored in the ammonia water drain tank 22 reaches a predetermined level.

[0025] Furthermore, the ammonia water drain tank 22 is equipped with a level gauge 22m for measuring the liquid level of the ammonia water stored in the ammonia water drain tank 22. The ship 1 is also equipped with a control unit 29 for controlling the opening and closing of the valve 24. The control unit 29 may control the valve 24, which is a control valve, to open when the liquid level of the ammonia water in the ammonia water drain tank 22, as measured by the level gauge 22m, is higher than a predetermined liquid level. Note that the level gauge 22m is an example of a liquid level measuring unit.

[0026] For example, if it is necessary to dilute the ammonia water accumulated in the ammonia water drain tank 22, the worker operates the valve 24 to open it, thereby allowing the ammonia water stored in the ammonia water drain tank 22 to flow into the ammonia water dilution tank 23.

[0027] Furthermore, the ammonia water drain tank 22 is equipped with a concentration meter 22n for measuring the ammonia concentration of the ammonia water stored in the ammonia water drain tank 22. The control unit 29 in the ship 1 may control the opening and closing of the control valve 24 based on the concentration of the ammonia water in the ammonia water drain tank 22 measured by the concentration meter 22n. For example, the control unit may be controlled to open the control valve 24 when the ammonia water concentration is higher than a predetermined value. Note that the concentration meter 22n is an example of a concentration measuring unit.

[0028] (Ammonia water dilution tank 23) The ammonia water dilution tank 23 stores fresh water. The fresh water stored in the ammonia water dilution tank 23 is then sprayed as spray water by the spraying unit 70 to the sections of the ship 1 where ammonia is present.

[0029] The ammonia water dilution tank 23 may be formed, for example, as a standalone tank. When the ammonia water dilution tank 23 is formed as a standalone tank, it may be made of, for example, an ammonia-resistant corrosion material. Alternatively, when the ammonia water dilution tank 23 is formed as a standalone tank, it may have a layer made of an ammonia-resistant corrosion material on its inner surface where it stores ammonia water.

[0030] Furthermore, the ammonia water dilution tank 23 may, for example, be made partly of the hull plating of the ship 1. If part of the ammonia water dilution tank 23 is made of the hull plating of the ship 1, for example, the inner surface of the interior where the ammonia water is stored may be provided with a layer made of an ammonia corrosion resistant material.

[0031] The ammonia water dilution tank 23 dilutes the ammonia water flowing in from the ammonia water drain tank 22 through the pipe 25 with fresh water stored inside. The vessel 1 is equipped with a discharge pipe 28 for discharging the diluted ammonia water from the ammonia water dilution tank 23 to the outside. The vessel 1 is equipped with a valve 26 on the discharge pipe 28. For example, when discharging the diluted ammonia water from the ammonia water dilution tank 23 to the outside, a wastewater recovery vehicle is connected to the discharge pipe 28. Then, by opening the valve 26, the ammonia water is discharged from the ammonia water dilution tank 23 by the wastewater recovery vehicle sucking in the ammonia water or by pressurizing it with a pump and draining it into the wastewater recovery vehicle.

[0032] Because ammonia is harmful to the human body, highly concentrated ammonia water may not be able to be disposed of or recovered by recycling companies. Therefore, when discharging ammonia water from a ship, it may be necessary to dilute it to a predetermined concentration. The ammonia recovery system according to the first embodiment dilutes the ammonia water stored in the second storage unit with the first storage unit which stores water. By diluting the ammonia water, the ammonia recovery system according to the first embodiment makes it possible to dispose of the ammonia water or have it collected by recycling companies.

[0033] Furthermore, the water stored in the ammonia dilution tank 23 is not limited to fresh water; for example, seawater may also be used.

[0034] (Ammonia tank 27) Ammonia tank 27 stores ammonia, which is used as fuel. Equipment for supplying ammonia as fuel is connected to bunker station 30. Then, ammonia as fuel is supplied from bunker station 30 to ammonia tank 27.

[0035] A tank connection space 21 is provided in the area connecting the ammonia tank 27 and the engine room 10. The tank connection space 21 is a space that covers the connection points of the piping for supplying ammonia to the ammonia tank 27 and the engine 11. The ammonia tank 27 is connected to the engine 11 in the engine room 10 via the tank connection space 21.

[0036] The vessel 1 is equipped with an ammonia gas detector 21s and a nozzle 21n in the tank connection space 21. When the vessel 1 detects ammonia in the tank connection space 21, the spraying unit 70 sprays fresh water stored in the ammonia water dilution tank 23 as spray water from the nozzle 21n. The spray water sprayed from the nozzle 21n becomes ammonia water as ammonia dissolves in it. The ammonia water is collected in the ammonia water drain tank 22 through the check valve 21v.

[0037] [Bunker Station 30] Bunker Station 30 is an area where receiving facilities are installed to supply ammonia, which will be used as fuel, to Ship 1 from onshore facilities or bunker barges.

[0038] The vessel 1 is equipped with an ammonia gas detector 30s and a nozzle 30n in its bunker station 30. When ammonia is detected in the bunker station 30, the vessel 1 uses a spraying unit 70 to spray fresh water stored in the ammonia water dilution tank 23 from the nozzle 30n as spray water. The spray water sprayed from the nozzle 30n becomes ammonia water as ammonia dissolves in it. The ammonia water is collected in the ammonia water drain tank 22 through a check valve 30v.

[0039] [Shower Station 40] The shower station 40 is an area equipped with a shower 40n for washing off ammonia adhering to the workers' bodies and clothing. The shower station 40 is connected to the ammonia water drain tank 22 through a check valve 40v. For example, the wastewater from the shower station 40 after washing off ammonia is collected in the ammonia water drain tank 22 through the check valve 40v.

[0040] [Duct 50] Duct 50 exhausts air from the double pipe 12 in the engine compartment 10 to the exhaust bend 80. Duct 50 exhausts air from the space between the inner and outer pipes of the double pipe 12.

[0041] The vessel 1 is equipped with an ammonia gas detector 50s and a nozzle 50n in the duct 50. The ammonia gas detector 50s is installed inside the duct 50, for example, near the inlet of the duct 50.

[0042] The duct 50 is equipped with a pot 50p in the middle, which collects the spray water sprayed from the nozzle 50n. The pot 50p is, for example, provided by widening a portion of the duct 50 to collect the sprayed water. The pot 50p is provided, for example, at a point where the duct 50 is bent at a 90-degree angle. The nozzle 50n is provided on the side of the duct 50 that is further away from the pot 50p than the inlet.

[0043] When ammonia is detected in the duct 50, the vessel 1 uses the spraying unit 70 to spray fresh water stored in the ammonia water dilution tank 23 from the nozzle 50n. The sprayed water from the nozzle 50n becomes ammonia water as ammonia dissolves in it. The ammonia water is temporarily stored in the pot 50p. The ammonia water stored in the pot 50p is collected in the ammonia water drain tank 22 through the check valve 50v.

[0044] By equipping the duct 50 with a pot 50p, the vessel 1 can prevent the spray water sprayed from the nozzle 50n from flowing into the double pipe 12. By preventing the spray water sprayed from the nozzle 50n from flowing into the double pipe 12, the vessel 1 can prevent the spray water from mixing with the inner pipe of the double pipe 12 through which the ammonia supplied to the engine 11 flows.

[0045] [Duct 60] Duct 60 exhausts from plant room 20 to exhaust vent 80.

[0046] The vessel 1 is equipped with an ammonia gas detector 60s and a nozzle 60n in the duct 60. The ammonia gas detector 60s is installed inside the duct 60, for example, near the inlet of the duct 60.

[0047] The duct 60 is equipped with a pot 60p in the middle, which collects the spray water sprayed from the nozzle 60n. The pot 60p is, for example, provided by widening a portion of the duct 60 to collect the sprayed water. The pot 60p is provided, for example, at a point where the duct 60 is bent at a 90-degree angle. The nozzle 60n is provided on the side of the duct 60 that is further away from the pot 60p than the inlet.

[0048] When ammonia is detected in the duct 60, the vessel 1 uses the spraying unit 70 to spray fresh water stored in the ammonia water dilution tank 23 from the nozzle 60n. The sprayed water from the nozzle 60n becomes ammonia water as ammonia dissolves in it. The ammonia water is temporarily stored in the pot 60p. The ammonia water stored in the pot 60p is collected in the ammonia water drain tank 22 through the check valve 60v.

[0049] By equipping the duct 60 with a pot 60p, the vessel 1 can prevent the water sprayed from the nozzle 60n from flowing into the plant room 20. By preventing the water sprayed from the nozzle 60n from flowing into the plant room 20, the vessel 1 can prevent the plant room 20 from being flooded.

[0050] [Spreading section 70] The spraying unit 70 sprays water stored in the ammonia water dilution tank 23 into the section where ammonia is present. The spraying unit 70 comprises a pump 71, control valves 72, 73, 74, and 75, and a controller 76.

[0051] The controller 76 acquires ammonia detection results from the ammonia gas detectors 21s, 30s, 50s, and 60s. The controller 76 then controls the motor 71m that operates the pump 71, as well as the control valves 72, 73, 74, and 75. In addition, if the controller 76 detects ammonia, it outputs a signal to the interlock 77 to emergency stop the engine 11.

[0052] For example, if ammonia is detected in the ammonia gas detector 21s, the controller 76 opens the control valve 72 and starts the motor 71m to send water stored in the ammonia water dilution tank 23 from the pump 71 to the tank connection space 21. By sending water stored in the ammonia water dilution tank 23 from the pump 71 to the tank connection space 21, the spraying unit 70 sprays the spray water from the nozzle 21n into the tank connection space 21.

[0053] Similarly, if ammonia is detected in the ammonia gas detector 30s, for example, the controller 76 opens the control valve 73 and starts the motor 71m to send water stored in the ammonia water dilution tank 23 from the pump 71 to the bunker station 30. By sending water stored in the ammonia water dilution tank 23 from the pump 71 to the bunker station 30, the spraying unit 70 sprays water from the nozzle 30n to the bunker station 30.

[0054] For example, if ammonia is detected in the ammonia gas detector 50s, the controller 76 opens the control valve 75 and starts the motor 71m to send water stored in the ammonia water dilution tank 23 from the pump 71 to the duct 50. By sending water stored in the ammonia water dilution tank 23 from the pump 71 to the duct 50, the spraying unit 70 sprays the spray water from the nozzle 50n into the duct 50.

[0055] For example, if ammonia is detected in the ammonia gas detector 60s, the controller 76 opens the control valve 74 and starts the motor 71m to send water stored in the ammonia water dilution tank 23 from the pump 71 to the duct 60. By sending water stored in the ammonia water dilution tank 23 from the pump 71 to the duct 60, the spraying unit 70 sprays the spray water from the nozzle 60n into the duct 60.

[0056] The tank connection space 21 where the ammonia gas detector 21s is installed is an example of a compartment on the vessel 1. Similarly, the bunker station where the ammonia gas detector 30s is installed, the duct 50 where the ammonia gas detector 50s is installed, and the duct 60 where the ammonia gas detector 60s is installed are each examples of compartments on the vessel 1. In the above example, the vessel 1 has four compartments, but the number of compartments is not limited to the above example. For example, the vessel 1 may have one compartment, or it may have two or more compartments.

[0057] As described above, the spraying unit 70 sprays water stored in the ammonia water dilution tank 23 as spraying water into the compartments in one or more compartments of the ship 1 where ammonia is present.

[0058] According to the ammonia recovery system of the first embodiment, for example, ammonia water produced by spraying water to recover leaked ammonia can be diluted in a first storage unit where water is stored. By diluting the ammonia water, the concentration of the ammonia water can be reduced to below a standard, allowing it to be disposed of, for example, or collected by a waste disposal company.

[0059] When recovering ammonia leaked by water spraying, the recovered water may contain ammonia to an extent that could affect human health and the natural environment, depending on the circumstances. Therefore, it is undesirable to discharge ammonia-containing water into the ocean or rivers. Thus, it is necessary to either remove the ammonia components through appropriate treatment on board the ship, or to store the recovered water on board and transfer it to land for treatment at onshore facilities upon docking.

[0060] In the latter case, the recovered water would be stored in storage facilities such as tanks. Assuming a large volume of water will be used for spraying, the capacity of the storage facilities will need to be increased. Increasing the capacity of the storage facilities would necessitate either increasing the size of the vessel or reducing the living space or cargo space. Furthermore, increasing the capacity of the storage facilities may affect the flexibility of the vessel's equipment layout.

[0061] Furthermore, if the recovered water has a high ammonia content, transporting it to land may become dangerous.

[0062] According to the ammonia recovery system of the first embodiment, the water containing the recovered ammonia can be safely transported on land without increasing the size of the storage facility.

[0063] ≪Ammonia Recovery System According to the Second Embodiment≫ A second embodiment of the ammonia recovery system will now be described. The second embodiment of the ammonia recovery system differs from the first embodiment in that it recovers ammonia water from the duct. Figure 5 is a diagram showing a schematic configuration of an ammonia recovery system 200, which is an example of the second embodiment of the ammonia recovery system. The description will include a ship 2 equipped with the ammonia recovery system 200.

[0064] Ship 2 comprises an engine room 10, a plant room 20, a bunker station 30, and a shower station 40. Ship 2 also comprises a duct 150 that exhausts from a double pipe 12 in the engine room 10 to an exhaust bend 80, and a duct 160 that exhausts from the plant room 20 to the exhaust bend 80. Furthermore, Ship 1 comprises a spraying unit 70 for spraying spray water. In other words, Ship 2 replaces the ducts 50 and 60 in Ship 1 with ducts 150 and 160.

[0065] Ship 2 is equipped with an ammonia recovery system 200 to recover leaked ammonia, for example. Similar to ammonia recovery system 100, ammonia recovery system 200 includes an ammonia water drain tank 22, a spraying unit 70, an ammonia water dilution tank 23, piping 25 connecting the ammonia water drain tank 22 and the ammonia water dilution tank 23, and a valve 24 located in piping 25. Ammonia recovery system 200 recovers ammonia water from the tank connection space 21, the bunker station 30, duct 150, and duct 160, respectively.

[0066] [Duct 150, Duct 160] Duct 150 differs from duct 50 in that the location of the pot is different. Duct 150 includes a pot 150p connected via piping partway along it. Pot 150p is connected via piping, for example, to a section where duct 150 is bent at a 90-degree angle. It is desirable that the location where pot 150p is connected is in a place where ammonia water flows and can be easily recovered.

[0067] By positioning the pot 150p at a distance from the duct 150 via piping, the vessel 2 can install the pot 150p in locations where the shape of the duct 150 cannot be changed. Furthermore, by positioning the pot 150p at a distance from the duct 150 via piping, the vessel 2 can install the pot 150p in an existing duct. Moreover, by positioning the pot 150p at a distance from the duct 150 via piping, the vessel 2 can increase the flexibility in the locations where the pot 150p can be installed. Additionally, by positioning the pot 150p at a distance from the duct 150 via piping, the vessel 2 can increase the flexibility regarding the shape of the pot 150p.

[0068] The above explanation described pot 150p in duct 150, but the same applies to pot 160p in duct 160.

[0069] According to the ammonia recovery system of the second embodiment, for example, ammonia water generated by spraying water to recover leaked ammonia can be diluted in a first storage unit where water is stored. By diluting the ammonia water, the concentration of the ammonia water can be reduced to below a standard, allowing it to be disposed of, for example, or collected by a waste disposal company. According to the ammonia recovery system of the second embodiment, the shape and position of the pot for recovering the ammonia water can be changed as appropriate.

[0070] Although embodiments have been described above, it will be understood that various modifications to the form and details are possible without departing from the spirit and scope of the claims. Various modifications and improvements are possible, such as combinations or substitutions with parts or all of other embodiments. [Explanation of Symbols]

[0071] 1, 2 ships 10. Engine Room 11 Engine 12 double tube 20 Plant Rooms 21 Tank connection space 22. Aquatic water drain tank 22m level gauge 22n concentration meter 23 Ammonia water dilution tank 24 valves 25 Piping 28 Discharge piping 29 Control Unit 30 Bunker Stations 40 shower stations 21n, 30n, 50n, 60n nozzles 21s, 30s, 50s, 60s Ammonia gas detector 21V, 30V, 40V, 50V, 60V check valve 50, 60, 150, 160 ducts 50p, 60p, 150p, 160p pot 70 Spreading section 71 Pump 71m motor 72, 73, 74, 75 Control valves 76 Controllers 100, 200 Ammonia Recovery System

Claims

1. A first storage section installed on a ship where water is stored, A spraying unit that sprays water onto one or more compartments in the vessel where ammonia is present, A second storage unit collects and stores ammonia water in which ammonia has been dissolved in the spray water that is sprayed in the compartment where ammonia is present, A pipe for flowing the ammonia water from the second storage unit to the first storage unit, A valve arranged in the aforementioned piping, Equipped with, By opening the valve, the ammonia water collected and stored in the second storage unit is diluted with the water stored in the first storage unit. Ammonia recovery system.

2. The system further includes a discharge pipe for discharging the water from the first storage unit to the outside. The ammonia recovery system according to claim 1.

3. A control unit that controls the valve, The system further comprises a liquid level measuring unit for measuring the liquid level of ammonia water in the second storage unit, The control unit controls the valve to open and allow the ammonia water recovered from the second storage unit to flow into the first storage unit when the liquid level measured by the liquid level measuring unit is higher than a predetermined liquid level. An ammonia recovery system according to either claim 1 or claim 2.

4. A control unit that controls the valve, The system further comprises a concentration measuring unit for measuring the ammonia concentration in the second storage unit, The control unit controls the valve to flow the ammonia water recovered from the second storage unit to the first storage unit based on the concentration measured by the concentration measuring unit. An ammonia recovery system according to either claim 1 or claim 2.

5. The spray water is supplied from the first storage unit. An ammonia recovery system according to either claim 1 or claim 2.

6. At least one of the aforementioned compartments is either a bunker station, a tank connection space, or a duct. An ammonia recovery system according to either claim 1 or claim 2.

7. Each of the aforementioned compartments or a plurality of such compartments is equipped with an ammonia gas detector, The spraying unit sprays the water onto the section where the ammonia gas was detected when the ammonia gas detector detected ammonia gas. An ammonia recovery system according to either claim 1 or claim 2.

8. The aforementioned spraying unit is, A pump for supplying the spray water stored in the first storage unit, The pump comprises a valve provided between one of the compartments or each of the multiple compartments, The spraying unit activates the pump when the ammonia gas detector detects ammonia gas, and opens the valve provided between the pump and the compartment where the ammonia gas was detected. The ammonia recovery system according to claim 7.

9. The spraying unit sprays the spraying water into a duct through which gas flows. The system further includes a pot provided between the duct and the second storage unit for collecting the sprayed water sprayed by the spraying unit and discharging it to the second storage unit. An ammonia recovery system according to either claim 1 or claim 2.

10. A check valve is further provided between each of the one or more of the aforementioned compartments and the second storage unit. An ammonia recovery system according to either claim 1 or claim 2.

11. The spraying unit sprays the water into a duct that exhausts the gas between the inner and outer pipes of a double-walled pipe. An ammonia recovery system according to either claim 1 or claim 2.

12. A portion of the first storage section is the outer plating of the ship. An ammonia recovery system according to either claim 1 or claim 2.

13. The first storage section includes a layer formed on its internal surface from an ammonia-resistant corrosion-resistant material. An ammonia recovery system according to either claim 1 or claim 2.

14. The first storage section is formed of an ammonia-resistant corrosion material. An ammonia recovery system according to either claim 1 or claim 2.

15. The second storage section comprises a layer formed on its internal surface from an ammonia-resistant corrosion-resistant material. An ammonia recovery system according to either claim 1 or claim 2.

16. The second storage section is formed of an ammonia-resistant corrosion material. An ammonia recovery system according to either claim 1 or claim 2.

17. The aforementioned spraying water is clean water. An ammonia recovery system according to either claim 1 or claim 2.

18. The ammonia recovery system comprises the ammonia recovery system according to either claim 1 or claim 2. ship.

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