Leakage protection absorption device for ammonia fuel supply system of ship

Abstract

The utility model discloses a leakage protection absorption device for a ship ammonia fuel supply system, and belongs to the technical field of ship ammonia fuel supply. The device comprises an ammonia storage unit, a power supply unit, a control unit and an ammonia collection unit, the ammonia storage unit is connected with the ammonia collection unit through a connecting pipeline and a control valve, the control valve comprises a safety valve, the ammonia collection unit comprises an ammonia absorption tank, and an outlet of the safety valve is connected with the ammonia absorption tank through a connecting pipeline. An ammonia absorption mechanism is arranged in the ammonia absorption tank, and ammonia entering the ammonia absorption tank is subjected to an absorption reaction through the ammonia absorption mechanism. Automatic control is achieved through the control unit, an outlet of the safety valve arranged on the system is connected with the ammonia absorption tank through the connecting pipeline, it is guaranteed that when the system breaks down, the safety valve acts to not discharge ammonia into the atmosphere or discharge the ammonia into the ammonia absorption tank, ammonia fuel is effectively prevented from leaking to the external environment, and damage to a ship body is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of ship ammonia fuel supply, and more specifically, relates to a leakage protection and absorption device for a ship ammonia fuel supply system. Background Technique

[0002] At present, green ammonia has become one of the most concerned green alternative fuels in the field of ship shipping. It is easy to compress and store and transport, and can achieve zero carbon emissions throughout the life cycle at a relatively low cost. The corrosiveness of liquid ammonia is weak. Generally, carbon steel will not cause very serious corrosion, but it will corrode copper, zinc and their alloys, rubber, plastics, etc. In industry, the phenomenon of pipeline cracking caused by liquid ammonia corrosion occurs from time to time. Moreover, explosive compounds will be formed after ammonia reacts with heavy metals such as silver, gold, mercury, and thallium, and need to be handled with caution.

[0003] When applied on a ship, when ammonia gas comes into contact with moisture in the air, the formed ammonia water may adhere to the vicinity of the hull shell, thereby corroding the hull structure. Therefore, it is necessary to carry out leakage protection treatment on the ship ammonia fuel system to avoid damage to the hull. At present, the ammonia leakage measures of the ship ammonia fuel supply system are relatively limited and cannot respond to the ammonia leakage of each unit of the system in time, thus easily causing damage to the external environment and the hull. Content of the Utility Model

[0004] The utility model aims at the technical problems existing in the prior art and provides a leakage protection and absorption device for a ship ammonia fuel supply system.

[0005] To solve the above technical problems, the utility model includes an ammonia storage unit, a supply power unit, a control unit and an ammonia collection unit. The ammonia storage unit and the ammonia collection unit are connected through a connecting pipeline and a control valve. The control valve includes a safety valve. The ammonia collection unit includes an ammonia absorption tank. The outlet of the safety valve is connected to the ammonia absorption tank through a connecting pipeline. An ammonia absorption mechanism is arranged in the ammonia absorption tank, and the ammonia entering the ammonia absorption tank is absorbed and reacted through the ammonia absorption mechanism.

[0006] Preferably, the ammonia absorption mechanism includes an absorption medium inlet, an ammonia inlet and a spray head device. The ammonia inlet is connected to the spray head device. The spray head device is provided with a spiral spray head. The spiral spray head is arranged at the bottom end of the ammonia absorption tank. The ammonia entering the ammonia absorption tank reacts with the absorption medium to complete ammonia absorption.

[0007] Preferably, a liquid level monitoring mechanism, a water replenishing mechanism and a liquid discharge driving mechanism are arranged on the ammonia absorption tank. When the liquid level monitoring mechanism monitors a low liquid level in the tank, the liquid discharge driving mechanism automatically closes under the action of the control unit, and the water replenishing mechanism operates; when the liquid level monitoring mechanism monitors a high liquid level in the tank, the water replenishing mechanism automatically closes under the action of the control unit.

[0008] Preferably, a PH monitoring mechanism is provided on the ammonia absorption tank. When the PH monitoring mechanism detects that the PH inside the tank is greater than 11, the liquid discharge driving mechanism operates to discharge the liquid inside the tank outward.

[0009] Preferably, the ammonia collection unit includes a collection tank, on which a liquid level switch and a discharge diaphragm pump are connected. The liquid level switch is provided with a high liquid level switch and a low liquid level switch. When the high liquid level switch gives an alarm, the control unit controls the discharge diaphragm pump to operate.

[0010] Preferably, the ammonia absorption tank is connected to the collection tank through a connecting pipeline.

[0011] Preferably, the leakage protection absorption device further includes a gas detection and alarm system and a spraying mechanism. An ammonia liquid collection mechanism is arranged at the lower end of the spraying mechanism, and the ammonia liquid collection mechanism is connected to the collection tank.

[0012] Preferably, the gas detection and alarm system is provided with an ammonia gas detection probe. The ship ammonia fuel supply system is provided with a number of skid units, and the ammonia gas detection probe is arranged close to the skid units.

[0013] Preferably, the spraying mechanism is arranged at the upper end of the skid unit, and the ammonia liquid collection mechanism is arranged at the bottom end of the skid unit. The ammonia liquid collection mechanism is provided with a drip tray, and the lowest point of the drip tray is connected to the collection tank through a pipeline.

[0014] Preferably, the supply power unit is provided with an ammonia supply pump. The exhaust port of the ammonia supply pump is connected to a pneumatic valve, and the pneumatic valve is connected to the ammonia absorption tank through a connecting pipeline.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] The present utility model provides a leakage protection absorption device for a ship ammonia fuel supply system, which realizes automatic control through a control unit. And the outlet of the safety valve set in the system is connected to the ammonia absorption tank through a connecting pipeline, ensuring that when the system fails, the safety valve action will not discharge ammonia into the atmosphere, but discharge it into the ammonia absorption tank, effectively preventing ammonia fuel from leaking into the external environment and avoiding damage to the hull. The collected ammonia is absorbed and processed by the ammonia absorption mechanism inside the ammonia absorption tank, and the system operation is safe and stable. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Structural Schematic of the Present Utility ModelFigure 1 ;

[0019] Figure 2 is the structural schematic diagram of the present utility model Figure 2 ;

[0020] Figure 3 is the partial schematic diagram of the connection between the ammonia absorption tank and the collection tank of the present utility model.

[0021] Description of the symbol markings in the figure:

[0022] 1. Ammonia storage unit; 11. First ammonia storage tank; 12. Second ammonia storage tank; 2. Supply power unit; 21. First ammonia pump; 22. Second ammonia pump; 3. Ammonia collection unit; 31. Ammonia absorption tank; 32. Absorption medium inlet; 33. Ammonia inlet; 34. Spiral nozzle; 4. Connection pipeline; 51. First gas-using main engine; 52. Second gas-using main engine; 6. Collection tank; 7. Ammonia liquid collection mechanism; 71. Drip tray. Specific embodiments

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] Please refer to Figure 1 , the present utility model provides a leakage protection absorption device for a ship ammonia fuel supply system, which includes an ammonia storage unit 1, a supply power unit 2, a control unit and an ammonia collection unit 3. The ammonia storage unit 1 and the ammonia collection unit 3 are connected through a connection pipeline 4 and a control valve. The control valve includes a safety valve. The ammonia collection unit 3 includes an ammonia absorption tank 31. The outlet of the safety valve is connected to the ammonia absorption tank 31 through the connection pipeline 4. An ammonia absorption mechanism is provided in the ammonia absorption tank 31, and the ammonia entering the ammonia absorption tank 31 is absorbed and reacted through the ammonia absorption mechanism.

[0025] The present utility model provides a leakage protection absorption device for a ship ammonia fuel supply system, which realizes automatic control through a control unit. And the outlet of the safety valve set in the system is connected to the ammonia absorption tank 31 through the connection pipeline 4, ensuring that when the system fails, the safety valve action will not discharge ammonia into the atmosphere, but discharge it into the ammonia absorption tank 31, effectively preventing ammonia fuel from leaking into the external environment and avoiding damage to the hull. The collected ammonia is absorbed and processed by the ammonia absorption mechanism inside the ammonia absorption tank 31, and the system operation is safe and stable.

[0026] In this embodiment, the ammonia storage unit 1 includes an ammonia storage tank. An outlet valve is connected to the liquid ammonia outlet pipeline of the ammonia storage unit. The upper end of the gas outlet of the ammonia storage tank is connected with a gas supply valve. The ammonia storage tank is a core component of the ship's ammonia gas supply system. Its main function is to store ammonia gas as fuel. During the operation of the ship, it supplies gas to the gas-consuming main engine through the gas supply unit, and its performance plays an important role in ensuring stable gas supply.

[0027] Specifically, as Figure 2 shown, the ammonia storage unit 1 is provided with two ammonia storage tanks, namely the first ammonia storage tank 11 and the second ammonia storage tank 12. The first ammonia storage tank 11 and the second ammonia storage tank 12 are respectively used for the ammonia fuel supply on the port side and starboard side of the ship. There are two gas-consuming main engines, namely the first gas-consuming main engine 51 and the second gas-consuming main engine 52. The first ammonia storage tank 11 and the second ammonia storage tank 12 are respectively used for the fuel supply of the two gas-consuming main engines. The first ammonia storage tank 11 and the second ammonia storage tank 12 have the same structural settings, and a liquid ammonia outlet and a gas outlet are provided on the ammonia storage tank.

[0028] In this embodiment, the supply power unit includes an ammonia pump. The liquid ammonia outlet of the ammonia storage tank is communicated with the ammonia pump. An exhaust valve and an ammonia pump outlet valve are provided on the ammonia pump.

[0029] Specifically, there are two ammonia pumps in the ammonia fuel supply system, namely the first ammonia pump 21 and the second ammonia pump 22. The two ammonia pumps respectively serve the two ammonia storage tanks. Among them, the first ammonia pump 21 is communicated with the first ammonia storage tank 11, and the second ammonia pump 22 is communicated with the second ammonia storage tank 12.

[0030] In this embodiment, the control unit is connected to each device in the system to achieve intelligent control. The control unit includes a control system and a gas supply control valve. The control system is provided with an operation panel. The gas supply control valve is arranged on the gas supply pipeline and is communicated with the ammonia storage unit and the supply power unit, and realizes precise automatic gas supply control under the action of the control system.

[0031] As Figure 2 、 Figure 3 shown, the ammonia absorption tank 31 is a system leakage ammonia absorption mechanism. First, the outlets of the safety valves set in the ammonia fuel supply system are all connected to the ammonia absorption tank 31 through pipelines. When the ammonia leakage safety valve acts, the discharged ammonia enters the ammonia absorption tank through the pipeline, and then is processed by the ammonia absorption mechanism therein, ensuring that even when the system fails, the safety valve action will not discharge ammonia into the atmosphere, avoiding damage to the external environment and the hull.

[0032] In this embodiment, the ammonia absorption mechanism arranged in the ammonia absorption tank 31 includes an absorption medium inlet 32, an ammonia inlet 33 and a spray head device. The ammonia inlet 33 is connected to the spray head device. The spray head device is provided with a spiral spray head 34. The spiral spray head 34 is arranged at the bottom end of the ammonia absorption tank 31. The ammonia entering the ammonia absorption tank 31 reacts with the absorption medium to complete ammonia absorption.

[0033] Specifically, the ammonia absorption tank 31 uses fresh water as the ammonia absorption medium. The upper end of the ammonia absorption tank 31 is provided with a water inlet. The spray head device is arranged at the bottom of the ammonia absorption tank 31. The spray head device is provided with a number of spiral spray heads 34 arranged in sequence. The ammonia entering the ammonia absorption tank 31 is sprayed out through the spiral spray heads 34 at the bottom and reacts with the fresh water in the tank to form ammonia water, and ammonia collection treatment is stably carried out.

[0034] Moreover, a liquid level monitoring mechanism, a water replenishing mechanism and a liquid discharge driving mechanism are arranged on the ammonia absorption tank 31. The liquid level monitoring mechanism includes a liquid level gauge, and the liquid level gauge monitors and gives an early warning of the high and low liquid levels in the ammonia absorption tank 31; the water replenishing mechanism includes a water replenishing valve, and the water replenishing valve is arranged at the water inlet of the ammonia absorption tank 31 to replenish fresh water when the fresh water absorption medium in the ammonia absorption tank 31 is insufficient; the liquid discharge driving mechanism includes a discharge diaphragm pump, and the ammonia water in the ammonia absorption tank 31 is discharged through the discharge diaphragm pump to prevent high liquid levels in the tank.

[0035] When the leaked ammonia in the system enters the ammonia absorption tank 31 and reacts with the fresh water in the tank to form ammonia water, when the low liquid level alarm of the liquid level gauge in the ammonia absorption tank 31 is triggered, the control unit controls the discharge diaphragm pump to automatically close and the water replenishing valve to open for fresh water replenishment; when the high liquid level alarm of the liquid level gauge is triggered, the water replenishing valve automatically closes and the discharge diaphragm pump is in an open state to discharge the liquid in the tank outward.

[0036] Furthermore, a PH monitoring mechanism is arranged on the ammonia absorption tank 31. The PH monitoring mechanism cooperates with the liquid level and the water replenishing valve. The PH monitoring mechanism includes a PH meter. The PH of the liquid in the tank is monitored through the PH meter. When the PH meter monitors that the PH value in the tank is greater than 11, the system automatically starts the discharge diaphragm pump to discharge the liquid in the tank into the collection tank 6.

[0037] The utility model absorbs and processes the ammonia discharged by the system through the ammonia absorption tank 31. The ammonia absorption tank 31 can automatically judge whether the absorption medium in the tank is saturated under the cooperation of each mechanism. If it is saturated, the discharge and water replenishment operations can be automatically completed, improving the reliability of the system and reducing the labor intensity of the crew.

[0038] Furthermore, in this embodiment, the system is also configured with a collection tank 6. The collection tank 6 is an ammonia collection device and can cooperate with the ammonia absorption tank 31 to collect saturated ammonia water.

[0039] Specifically, the ammonia absorption tank 31 is connected to the collection tank 6 through a connecting pipeline 4, and the discharge diaphragm pump is connected to the collection tank 6 through a connecting pipeline. When the liquid level in the ammonia absorption tank 31 exceeds the standard, the liquid in the ammonia absorption tank 31 is discharged to the collection tank 6 through the discharge diaphragm pump, preventing the absorbed ammonia liquid from remaining in the ammonia absorption tank 31 and improving the absorption efficiency of the ammonia absorption tank 31.

[0040] In this embodiment, a liquid level switch and a second discharge diaphragm pump are connected to the collection tank 6. The liquid level switch is provided with a high liquid level switch and a low liquid level switch. When the high liquid level switch detects a high liquid level warning in the tank, the second discharge diaphragm pump is automatically turned on under the control of the control unit to discharge and process the ammonia liquid, facilitating the crew to centrally process the ammonia water. When the low liquid level switch monitors that the liquid level in the tank is low, the system will issue an alarm to remind the crew to replenish water in time.

[0041] Furthermore, in this embodiment, the ammonia pump is the ammonia supply power device of the system. By setting an exhaust valve at the exhaust port of the ammonia pump, the exhaust valve is connected to the ammonia absorption tank 31 through a connecting pipeline. Since automatic exhaust is required before the pump is started, the exhaust port of the ammonia pump is connected to the ammonia absorption tank 31 through the connecting pipeline. When the ammonia pump starts to automatically exhaust, the ammonia and gas mixture will enter the ammonia absorption tank 31 through the pipeline for collection and processing, reducing the labor intensity of the crew and at the same time preventing the ammonia from being discharged into the atmosphere during the exhaust operation, avoiding causing harm.

[0042] Furthermore, as shown in Figure 3 Figure 2, the leakage protection absorption device further includes a gas detection and alarm system and a spraying mechanism. An ammonia liquid collection mechanism 7 is arranged at the lower end of the spraying mechanism, and the ammonia liquid collection mechanism 7 is connected to the collection tank 6.

[0043] Specifically, the ammonia fuel supply system is provided with several skid units. The skid units have the characteristics of high flexibility, high integration, small floor area, easy installation and migration, etc. At the same time, through the control system, the fuel supply process can be precisely controlled and monitored, realizing the integration of multiple devices, pipelines, valves, etc. in a compact modular unit. Several skid units are respectively responsible for the ammonia fuel storage and supply, fuel processing and distribution, system safety, system control, etc. of the system. Multiple skid units in the system are interconnected and cooperate with each other to achieve the stable operation of the system and ensure the smoothness and safety of the entire supply process.

[0044] In this embodiment, the gas detection and alarm system is arranged near each skid unit for gas leakage monitoring. The gas detection and alarm system is equipped with ammonia detection probes. The spraying mechanism is arranged above the skid unit, and the ammonia liquid collection mechanism 7 is arranged below the skid unit for collecting the ammonia water formed by the liquid sprayed by the spraying mechanism and ammonia. When the ammonia detection probe detects ammonia leakage in the skid unit, the control unit controls the automatic start of the spraying mechanism. The spraying mechanism sprays a water curtain to absorb and mix the leaked ammonia to form ammonia water, which then drips onto the ammonia liquid collection mechanism 7 below and then enters the collection tank 6 through a pipeline.

[0045] Furthermore, the spraying mechanism is equipped with nozzles, and the ammonia liquid collection mechanism 7 is equipped with a drip tray 71. The drip tray 71 is a groove liquid collection mechanism, and the lowest point of the drip tray 71 is connected to the collection tank 6 through a pipeline. With this utility model, the ammonia detection probe can monitor in real time whether there is ammonia leakage in the system. If leakage occurs, the spraying mechanism can be used to absorb ammonia in the atmosphere, and the ammonia water after spraying is collected by the drip tray 71 and centrally transported to the collection tank 6 to prevent secondary pollution.

[0046] Furthermore, in this embodiment, multiple collection tanks 6 can be set according to the system requirements to meet the leakage protection and absorption requirements of the system.

[0047] This utility model provides a leakage protection and absorption device for a ship ammonia fuel supply system, which realizes automatic control through a control unit. The outlet of the safety valve set in the system is connected to an ammonia absorption tank through a connecting pipeline to ensure that when the system fails, the safety valve action will not discharge ammonia into the atmosphere but discharge it into the ammonia absorption tank, effectively preventing ammonia fuel from leaking into the external environment and avoiding damage to the hull. The ammonia in the collected ammonia is absorbed and processed by the ammonia absorption mechanism inside the ammonia absorption tank. The ammonia absorption tank can automatically judge whether the absorption medium is saturated. If saturated, it can automatically complete the discharge and water replenishment operations, improving the reliability of the system and reducing the labor intensity of the crew. At the same time, the system is configured with a collection tank, which is connected to the ammonia absorption tank, can collect the saturated ammonia water, avoid leaving it in the ammonia absorption tank, improve the absorption efficiency of the ammonia absorption tank, and also facilitate the crew's centralized treatment of ammonia water.

[0048] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0050] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A leakage protection absorption device for a ship ammonia fuel supply system, comprising an ammonia storage unit, a power supply unit, a control unit and an ammonia collection unit, characterized in that: The ammonia storage unit is connected to the ammonia collection unit via a connecting pipeline and a control valve, the control valve includes a safety valve, the ammonia collection unit includes an ammonia absorption tank, the safety valve outlet is connected to the ammonia absorption tank via a connecting pipeline, an ammonia absorption mechanism is provided in the ammonia absorption tank, and the ammonia entering the ammonia absorption tank is subjected to an absorption reaction by the ammonia absorption mechanism.

2. A leakage protection absorption device for a ship ammonia fuel supply system according to claim 1, characterized in that: The ammonia absorption mechanism includes an absorption medium inlet, an ammonia inlet and a nozzle device. The ammonia inlet is connected to the nozzle device. The nozzle device is provided with a spiral nozzle. The spiral nozzle is arranged at the bottom of the ammonia absorption tank. The ammonia entering the ammonia absorption tank is mixed and reacted with the absorption medium to complete the ammonia absorption.

3. A leakage protection absorption device for a ship ammonia fuel supply system according to claim 2, characterized in that: The ammonia absorption tank is provided with a liquid level monitoring mechanism, a water replenishing mechanism and a liquid discharge driving mechanism. When the liquid level monitoring mechanism detects a low liquid level in the tank, the liquid discharge driving mechanism is automatically closed under the action of the control unit, and the water replenishing mechanism is activated; when the liquid level monitoring mechanism detects a high liquid level in the tank, the water replenishing mechanism is automatically closed under the action of the control unit.

4. A leakage protection absorption device for a ship ammonia fuel supply system according to claim 3, characterized in that: The ammonia absorption tank is provided with a pH monitoring mechanism. When the pH monitoring mechanism detects that the pH in the tank is greater than 11, the liquid discharge driving mechanism is activated to discharge the liquid in the tank to the outside.

5. A leakage protection absorption device for a ship ammonia fuel supply system according to any one of claims 1 to 4, characterized in that: The ammonia collection unit includes a collection tank, so the collection tank is connected to a liquid level switch and a discharge diaphragm pump. The liquid level switch is provided with a high liquid level switch and a low liquid level switch. When the high liquid level switch warns, the control unit controls the discharge diaphragm pump to operate.

6. A leakage protection absorption device for a ship ammonia fuel supply system according to claim 5, characterized in that: The ammonia absorption tank is connected to the collection tank via a connecting pipeline.

7. The leakage protection absorption device for a ship ammonia fuel supply system according to claim 5, characterized in that: The leakage protection absorption device also includes a gas detection alarm system and a spray mechanism. An ammonia liquid collecting mechanism is arranged at the lower end of the spray mechanism, and the ammonia liquid collecting mechanism is connected to the collecting tank.

8. The leakage protection absorption device for a ship ammonia fuel supply system according to claim 7, characterized in that: The gas detection alarm system is provided with an ammonia detection probe, and the ship ammonia fuel supply system is provided with a plurality of skid units, and the ammonia detection probe is arranged close to the skid units.

9. A leakage protection absorption device for a ship ammonia fuel supply system according to claim 8, characterized in that: The spray mechanism is arranged at the upper end of the skid unit, the ammonia liquid collecting mechanism is arranged at the bottom end of the skid unit, and the ammonia liquid collecting mechanism is provided with a drip tray, and the lowest point of the drip tray is connected to the collection tank through a pipeline.

10. The leakage protection absorption device for a ship ammonia fuel supply system according to claim 1, characterized in that: The supply power unit is provided with an ammonia supply pump, the exhaust port of the ammonia supply pump is connected to a pneumatic valve, and the pneumatic valve is connected to the ammonia absorption tank through a connecting pipeline.

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