A film storage siphon tank conveying system

Abstract

The present application relates to a membrane storage siphon tank type conveying system, including a membrane tank, a temperature and pressure control mechanism and a siphon infusion mechanism; the liquid ammonia input end of the temperature and pressure control mechanism is used to receive pressurized room temperature liquid ammonia, the temperature and pressure control mechanism is used to reduce pressure and cool the pressurized room temperature liquid ammonia to generate reduced pressure and cooled liquid ammonia, the liquid ammonia output end of the temperature and pressure control mechanism is connected to the liquid ammonia input end of the membrane tank, so that the membrane tank receives the reduced pressure and cooled liquid ammonia; the liquid ammonia input end of the siphon infusion mechanism is connected to the liquid ammonia output end of the membrane tank, and the siphon infusion mechanism is used to generate negative pressure to suck the reduced pressure and cooled liquid ammonia into the siphon infusion mechanism through the liquid ammonia output end of the membrane tank. Through the temperature and pressure control mechanism, the need for traditional high-pressure containers is avoided, thereby greatly reducing energy consumption during storage and transportation; the siphon infusion mechanism significantly reduces the energy consumption and maintenance costs of traditional pumping systems, thereby improving the energy efficiency of the entire storage and transportation process.

Description

Technical Field

[0001] The invention relates to the technical field of a film storage siphon tank type conveying system, in particular to a film storage siphon tank type conveying system. Background Art

[0002] At present, in order to achieve emission reduction targets, traditional ships usually use alternative fuels such as green methanol. Although this has alleviated the pressure of carbon emissions to a certain extent, it has failed to fundamentally solve the problem of carbon emissions. Ammonia, as a carbon-free fuel, has significant environmental advantages. It releases almost no carbon dioxide during combustion, so it is considered to be one of the important options for achieving carbon neutrality goals. However, the storage and transportation of ammonia fuel has always been a technical problem. At present, liquid ammonia is usually stored in the form of pressurization at room temperature, which requires high-pressure containers or special high-pressure storage systems. This storage method poses high challenges to the technical requirements and safety of the equipment. In addition, traditional liquid ammonia storage methods also have problems with low energy efficiency and high maintenance costs. Summary of the invention

[0003] In order to solve the problems of high pressure requirement, low energy efficiency and high maintenance cost in the ammonia fuel storage process, the present application provides a membrane storage siphon tank delivery system.

[0004] A film storage siphon tank type conveying system, comprising a film tank, a temperature and pressure control mechanism, a pressure relief mechanism and a siphon infusion mechanism;

[0005] The liquid ammonia input end of the temperature and pressure control mechanism is used to receive pressurized room-temperature liquid ammonia, and the temperature and pressure control mechanism is used to reduce the pressure and temperature of the pressurized room-temperature liquid ammonia to generate reduced-pressure and reduced-temperature liquid ammonia. The liquid ammonia output end of the temperature and pressure control mechanism is connected to the liquid ammonia input end of the membrane tank so that the membrane tank receives the reduced-pressure and reduced-temperature liquid ammonia.

[0006] The gas input end of the pressure relief mechanism is connected to the pressure relief end located at the top of the membrane tank. When the decompressed and cooled liquid ammonia enters the membrane tank, the gas phase in the membrane tank is discharged to the pressure relief mechanism through the pressure relief end at the top of the membrane tank to balance the pressure change caused by the decompressed and cooled liquid ammonia entering the membrane tank.

[0007] The liquid ammonia input end of the siphon infusion mechanism is connected to the liquid ammonia output end of the membrane tank. The siphon infusion mechanism is used to generate negative pressure to suck the reduced-pressure and cooled liquid ammonia into the siphon infusion mechanism through the liquid ammonia output end of the membrane tank. The liquid ammonia output end of the siphon infusion mechanism is used to output the reduced-pressure and cooled liquid ammonia to the liquid ammonia demand mechanism.

[0008] By adopting the above technical solution, the temperature and pressure control mechanism converts the pressurized normal temperature liquid ammonia into the decompressed and cooled liquid ammonia by means of decompression and cooling. In the traditional storage system, liquid ammonia usually needs to be kept in a high pressure environment to maintain the liquid state, which not only requires a lot of energy to maintain the high pressure state, but also increases the technical complexity and safety hazards of the equipment. Through the temperature and pressure control mechanism, the liquid ammonia is decompressed and cooled when it is input into the system, and converted into low temperature and normal pressure liquid ammonia, avoiding the need for traditional high pressure containers, thereby greatly reducing the energy consumption during storage and transportation, and simplifying the equipment structure; the pressure relief mechanism solves the pressure change problem caused by the decompressed and cooled liquid ammonia entering the storage tank by effectively discharging the gas phase in the membrane tank. The decompression and cooling of liquid ammonia will cause the gas volume to expand, and the pressure in the membrane tank will change at this time. The pressure relief mechanism can discharge the gas in time when the liquid ammonia enters the membrane tank, avoiding the situation where the pressure in the tank is too high or uneven, which not only ensures the safety of the tank body, but also ensures the stability and efficiency of the system operation; the siphon infusion mechanism generates negative pressure to absorb the decompressed and cooled liquid ammonia from the membrane tank and transport it to the demand mechanism. The siphon technology itself does not rely on an external energy source (such as a traditional submersible pump), but instead uses the principle of liquid ammonia's own weight and gas pressure difference to drive the flow of liquid ammonia. This method significantly reduces the energy consumption and maintenance costs of traditional pumping systems, and also reduces dependence on high-energy equipment, thereby improving the energy efficiency of the entire storage and transportation process. Especially in the transportation of liquid ammonia, the siphon technology avoids the additional energy consumption and failure risks brought by mechanical pumps; by changing the liquid ammonia storage environment from high pressure to low temperature and normal pressure, and combining effective pressure regulation and siphon transportation mechanisms, it successfully solves the problems of low energy efficiency, poor safety and high maintenance costs faced in the storage and transportation of ammonia fuel. Ultimately, this innovative design not only reduces energy consumption and system complexity, but also improves the storage and transportation efficiency of ammonia fuel, and promotes the application of ammonia as a clean energy source.

[0009] Preferably, the temperature and pressure control mechanism comprises a liquid inlet cooling heat exchanger and a liquid inlet pressure reducing valve, the liquid ammonia input end of the liquid inlet cooling heat exchanger is used to receive pressurized liquid ammonia at room temperature, the liquid ammonia output end of the liquid inlet cooling heat exchanger is connected to the liquid ammonia input end of the liquid inlet pressure reducing valve, and the liquid ammonia output end of the liquid inlet pressure reducing valve is connected to the liquid ammonia input end of the membrane tank;

[0010] The liquid inlet cooling heat exchanger is used to cool the pressurized room-temperature liquid ammonia to generate pressurized cooled liquid ammonia, and outputs it to the liquid inlet pressure reducing valve through the liquid ammonia output end of the liquid inlet cooling heat exchanger. The liquid inlet pressure reducing valve is used to reduce the pressure of the pressurized cooled liquid ammonia to generate reduced-pressure cooled liquid ammonia, and outputs it to the membrane tank through the liquid ammonia output end of the liquid inlet pressure reducing valve.

[0011] By adopting the above technical scheme, the pressurized room temperature liquid ammonia is cooled by the liquid inlet cooling heat exchanger in the temperature and pressure control mechanism, so that the temperature of the liquid ammonia can reach an appropriate range, ensuring the stability and safety of the subsequent treatment process, thereby reducing the risk of gasification or abnormal fluctuation of liquid ammonia during transportation; the pressurized temperature-reduced liquid ammonia is reduced in pressure by the liquid inlet pressure reducing valve, which can further reduce the pressure of the liquid ammonia and ensure the safe storage of the liquid ammonia in the membrane tank. At the same time, it also provides the required negative pressure conditions for siphon transportation, thereby optimizing the storage and transportation efficiency of liquid ammonia.

[0012] Preferably, the temperature and pressure control mechanism also includes a cold-keeping coil located in the film tank, and both ends of the cold-keeping coil are connected to a refrigeration mechanism so that refrigerant flows in the cold-keeping coil, thereby keeping the reduced-pressure and reduced-temperature liquid ammonia cold.

[0013] By adopting the above technical solution, by arranging a cold preservation coil in the film tank and connecting it to the refrigeration mechanism, the decompressed and cooled liquid ammonia can be continuously kept cold during the storage process of liquid ammonia, ensuring the temperature stability of the liquid ammonia during storage, thereby preventing the liquid ammonia from converting into a gaseous state due to temperature increase, avoiding leakage or excessive load on the compressor, and further improving the safety and reliability of the system.

[0014] Preferably, the pressure relief mechanism includes a pressure relief control valve group and a pressure relief exhaust venturi, the nitrogen input end of the pressure relief control valve group is connected to the nitrogen supply mechanism, the nitrogen output end of the pressure relief control valve group is connected to the nitrogen input end of the pressure relief exhaust venturi, the ammonia nitrogen input end of the pressure relief exhaust venturi is connected to the pressure relief end at the top of the membrane tank, and the ammonia nitrogen output end of the pressure relief exhaust venturi is used to output ammonia-containing nitrogen to the ammonia recovery mechanism.

[0015] By adopting the above technical scheme, through the combined use of the pressure relief control valve group and the pressure relief exhaust venturi, it is possible to automatically adjust and release the excess gas in the tank when the reduced-pressure and cooled liquid ammonia enters the membrane tank, thereby maintaining the normal working pressure in the membrane tank and preventing equipment damage or liquid ammonia leakage due to excessive gas pressure; by discharging the ammonia nitrogen gas through the pressure relief exhaust venturi and transporting it to the ammonia recovery mechanism, the ammonia gas can be effectively recovered and reused, reducing environmental pollution and improving resource utilization.

[0016] Preferably, the siphon infusion mechanism includes two siphon conveying components, a negative pressure control valve and a negative pressure generating venturi tube, the liquid ammonia output end of the membrane tank includes two output ports arranged in parallel, the liquid ammonia input end of the siphon conveying component is connected to one of the output ports, the liquid ammonia output end of the siphon conveying component is connected to a liquid ammonia demand mechanism, the gas output end of the siphon conveying component is connected to a first gas input end of the negative pressure generating venturi tube, the second gas input end of the negative pressure generating venturi tube is connected to one end of the negative pressure control valve, the other end of the negative pressure control valve is connected to a nitrogen supply mechanism, and the gas output end of the negative pressure generating venturi tube is connected to an ammonia recovery mechanism.

[0017] By adopting the above technical solution, through the configuration of two siphon delivery components in the siphon infusion mechanism, bidirectional delivery of liquid ammonia can be achieved, thereby improving the delivery flexibility and efficiency of the system; through the synergistic effect of the negative pressure control valve and the negative pressure generating Venturi tube, the flow direction of liquid ammonia can be effectively controlled by generating negative pressure, thereby ensuring that liquid ammonia can be accurately delivered to the specified location according to demand, further optimizing the operating efficiency of the system.

[0018] Preferably, the siphon conveying component comprises a siphon tank, a membrane drain valve, a siphon drain valve, a pressurizing valve and a negative pressure generating valve; the membrane drain valve is connected between the liquid ammonia input end of the siphon tank and the output port; the siphon drain valve is connected between the liquid ammonia output end of the siphon tank and the liquid ammonia demand mechanism; the pressurizing valve is connected between the gas output end of the siphon tank and the nitrogen supply mechanism on the one hand, and the negative pressure generating valve is connected between the gas output end of the siphon tank and the first gas input end of the negative pressure generating venturi tube on the other hand;

[0019] When one of the siphon tanks absorbs the reduced-pressure and cooled liquid ammonia, the pressurizing valve and the siphon drain valve are closed, and the negative pressure generating valve and the membrane drain valve are opened. When the negative pressure generating valve is opened, the siphon tank generates negative pressure due to the nitrogen flow through the negative pressure generating venturi tube, and then the reduced-pressure and cooled liquid ammonia enters the siphon tank through the membrane drain valve;

[0020] At the same time, the other negative pressure generating valve and the other membrane drain valve are closed, the other pressurizing valve and the other siphon drain valve are opened, and the nitrogen flows through the other pressurizing valve to the other siphon tank, thereby causing the reduced-pressure and cooled liquid ammonia to flow through the other siphon drain valve to transport the reduced-pressure and cooled liquid ammonia to the liquid ammonia demand mechanism.

[0021] By adopting the above technical scheme, through the combined use of the siphon tank, the membrane drain valve, the siphon drain valve, the pressurizing valve and the negative pressure generating valve in the siphon conveying component, it is possible to realize the automatic suction and delivery of liquid ammonia, avoid manual intervention, and ensure efficient operation under different working conditions; through the linkage of the negative pressure generating valve and the negative pressure generating Venturi tube, the required negative pressure can be quickly generated, so that the liquid ammonia enters the siphon tank through the membrane drain valve, thereby realizing efficient liquid ammonia transmission, reducing system energy consumption and improving work efficiency.

[0022] Preferably, a liquid level sensor element is provided on the siphon tank, a displacement control valve group is provided between the siphon drain valve and the liquid ammonia demand mechanism, and the liquid level sensor element is electrically connected to the displacement control valve group.

[0023] By adopting the above technical solution, by arranging a liquid level sensor element on the siphon tank and electrically connecting it to the displacement control valve group, the liquid level change of the liquid ammonia in the siphon tank can be monitored in real time, and the liquid ammonia delivery amount can be dynamically adjusted according to the liquid level change, thereby avoiding overfull or insufficient liquid ammonia storage, ensuring a stable supply of liquid ammonia and reducing the risk of unexpected shutdown of the system or waste of liquid ammonia.

[0024] Preferably, the membrane tank is provided with a monitoring component, and the monitoring component includes a liquid level gauge, a temperature-variable sensor element and a pressure-variable sensor element.

[0025] By adopting the above technical solution and setting monitoring components on the membrane tank, including a liquid level gauge, a temperature-variable sensor element and a pressure-variable sensor element, the storage status of liquid ammonia can be monitored in real time to ensure that the storage conditions of liquid ammonia meet the requirements, thereby reducing the risk of equipment failure and liquid ammonia leakage and improving the safety of the system; through real-time feedback of monitoring data, it can provide the system with accurate control basis, further improving the automation and intelligence level of the system.

[0026] Preferably, the membrane storage siphon tank transport system includes a nitrogen protection mechanism, which includes an intake pressure control valve group, one end of the intake pressure control valve group is connected to the nitrogen supply mechanism, and the other end is connected to the membrane tank, and the intake pressure control valve group is electrically connected to the monitoring component.

[0027] By adopting the above technical solution, the intake pressure control valve group in the nitrogen protection mechanism can continuously supply nitrogen in the membrane tank, stabilize the air pressure in the membrane tank, and prevent liquid ammonia leakage or danger; by electrically connecting the intake pressure control valve group with the monitoring component, the input amount of nitrogen can be automatically adjusted according to the monitoring data to ensure that the air pressure in the membrane tank is always within a safe range, thereby improving the safety and reliability of the system.

[0028] Preferably, the nitrogen protection mechanism further comprises an exhaust pressure control valve group, one end of the exhaust pressure control valve group is connected to the membrane tank, and the other end is connected to an ammonia recovery mechanism for recovering nitrogen.

[0029] By adopting the above technical solution, through the combined use of the exhaust pressure control valve group and the ammonia recovery mechanism, nitrogen can be discharged and recovered after passing through the exhaust pressure control valve group, reducing gas waste, and the recovered nitrogen can be used for other purposes or re-injected into the system, thereby improving the resource utilization rate of nitrogen, reducing environmental pollution, and providing the system with more energy and operating cost savings.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The present application uses a temperature and pressure control mechanism to convert pressurized room-temperature liquid ammonia into low-temperature, normal-pressure liquid ammonia by means of decompression and cooling. In traditional storage systems, liquid ammonia usually needs to be kept in a high-pressure environment to maintain its liquid state, which not only requires a large amount of energy to maintain the high-pressure state, but also increases the technical complexity and safety hazards of the equipment. Through the temperature and pressure control mechanism, the liquid ammonia is decompressed and cooled when it is input into the system, and converted into low-temperature, normal-pressure liquid ammonia, avoiding the need for traditional high-pressure containers, thereby greatly reducing energy consumption during storage and transportation, and simplifying the equipment structure;

[0032] 2. This application solves the problem of pressure change caused by the entry of decompressed and cooled liquid ammonia into the storage tank by effectively discharging the gas phase in the membrane tank through the pressure relief mechanism. The decompression and cooling of liquid ammonia will cause the volume of the gas to expand, and the pressure in the membrane tank will change. The pressure relief mechanism can discharge the gas in time when the liquid ammonia enters the membrane tank, avoiding the situation where the pressure in the tank is too high or uneven, which not only ensures the safety of the tank, but also ensures the stability and efficiency of the system operation;

[0033] 3. This application uses a siphon infusion mechanism to generate negative pressure, suck low-temperature and normal-pressure liquid ammonia from a membrane tank and deliver it to the demand mechanism. The siphon technology itself does not rely on an external energy source (such as a traditional submersible pump), but uses the principle of liquid ammonia's own weight and gas pressure difference to drive the flow of liquid ammonia. This method significantly reduces the energy consumption and maintenance costs of traditional pumping systems, and also reduces dependence on high-energy equipment, thereby improving the energy efficiency of the entire storage and transportation process. Especially in the transportation of liquid ammonia, the siphon technology avoids the extra energy consumption and failure risks brought by mechanical pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural flow chart of a film storage siphon tank conveying system in one embodiment of the present application.

[0035] Figure 2It is a specific structural schematic diagram of a film storage siphon tank conveying system in one embodiment of the present application.

[0036] Figure 3 It is a specific structural schematic diagram of a film storage siphon tank conveying system in another embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1. Membrane tank; 11. Monitoring components; 2. Temperature and pressure control mechanism; 21. Liquid inlet cooling heat exchanger; 22. Liquid inlet pressure reducing valve; 23. Cold keeping coil; 3. Pressure relief mechanism; 31. Pressure relief control valve group; 32. Pressure relief exhaust venturi; 4. Siphon infusion mechanism; 41. Siphon delivery component; 411. Siphon tank; 412. Membrane drain valve; 413. Siphon drain valve; 414. Pressurizing valve; 415. Negative pressure generating valve; 416. Liquid level sensor element; 417. Displacement control valve group; 42. Negative pressure control valve; 43. Negative pressure generating venturi; 5. Nitrogen protection mechanism; 51. Intake pressure control valve group; 52. Exhaust pressure control valve group. DETAILED DESCRIPTION

[0039] The present application is further described in detail below in conjunction with the accompanying drawings.

[0040] In one embodiment, if Figure 1 As shown, the present application discloses a film storage siphon tank type delivery system, comprising a film tank 1, a temperature and pressure control mechanism 2, a pressure relief mechanism 3 and a siphon infusion mechanism 4;

[0041] The liquid ammonia input end of the temperature and pressure control mechanism 2 is used to receive pressurized room-temperature liquid ammonia. The temperature and pressure control mechanism 2 is used to reduce the pressure and temperature of the pressurized room-temperature liquid ammonia to generate reduced-temperature liquid ammonia. The liquid ammonia output end of the temperature and pressure control mechanism 2 is connected to the liquid ammonia input end of the membrane tank 1, so that the membrane tank 1 receives the reduced-temperature liquid ammonia.

[0042] The gas input end of the pressure relief mechanism 3 is connected to the pressure relief end at the top of the membrane tank 1. When the decompressed and cooled liquid ammonia enters the membrane tank 1, the gas phase in the membrane tank 1 is discharged to the pressure relief mechanism 3 through the pressure relief end at the top of the membrane tank 1 to balance the pressure change caused by the decompressed and cooled liquid ammonia entering the membrane tank 1.

[0043] The liquid ammonia input end of the siphon infusion mechanism 4 is connected to the liquid ammonia output end of the membrane tank 1. The siphon infusion mechanism 4 is used to generate negative pressure to suck the reduced-pressure and cooled liquid ammonia into the siphon infusion mechanism 4 through the liquid ammonia output end of the membrane tank 1. The liquid ammonia output end of the siphon infusion mechanism 4 is used to output the reduced-pressure and cooled liquid ammonia to the liquid ammonia demand mechanism.

[0044] In this embodiment, liquid ammonia, as a carbon-free fuel, has great potential to play an important role in the carbon neutral industry. Although the traditional way of reducing carbon emissions in ships has made some progress by using alternative fuels such as green methanol, it has not yet achieved "zero carbon emissions" in the true sense. Ammonia fuel, as an ideal alternative, can effectively eliminate the problem of carbon emissions. However, the storage and transportation of ammonia fuel is still a difficult problem in technical applications, especially when liquid ammonia is stored under pressure at room temperature. The traditional storage system requires not only high-pressure containers, but also complex pressure regulation and gas recovery systems, which puts higher demands on ships, storage tanks and the entire supply chain. In contrast, as an emerging storage technology, the membrane tank 1 has a wide range of application prospects in the field of liquid ammonia storage by virtue of its advantages such as short construction period, compact structure and low cost. However, since the membrane tank 1 is not suitable for storing high-pressure or high-pressure media (such as liquid ammonia under pressure at room temperature), the present application converts liquid ammonia under pressure at room temperature into liquid ammonia under pressure and cooling by reducing pressure and cooling, which solves the problem of high-pressure storage and can replace the traditional BOG recovery, pressure regulation system and submersible pump delivery system. It not only significantly reduces the energy consumption of the system, but also improves the safety and economy of the storage and transportation process, paving the way for the widespread application of ammonia fuel.

[0045] First, the liquid ammonia input end of the temperature and pressure control mechanism 2 receives pressurized room-temperature liquid ammonia from the outside. Under conventional storage methods, room-temperature liquid ammonia usually requires a high-pressure environment to maintain its liquid state, which places high requirements on the structure of the membrane tank 1 and requires a large amount of energy to maintain high pressure. Therefore, the temperature and pressure control mechanism 2 adopts a method of reducing pressure and cooling to convert room-temperature pressurized liquid ammonia into reduced-pressure and cooled liquid ammonia. The process of reducing pressure and cooling makes the liquid ammonia in a state suitable for storage in the membrane tank 1 in terms of temperature and pressure, avoiding the high-pressure problem that may be caused by liquid ammonia during storage, and ensuring the safety of the storage tank. At the same time, in this way, the high-pressure and high-energy consumption facilities relied on in the traditional storage system are replaced, which can significantly reduce energy consumption and reduce the operating cost of the overall system. The connection between the membrane tank 1 and the temperature and pressure control mechanism 2 further enhances the effectiveness of this process. The temperature and pressure control mechanism 2 introduces the liquid ammonia after reducing pressure and cooling into the membrane tank 1, and the temperature and pressure of the liquid ammonia reach suitable storage conditions during this process. The membrane tank 1 itself has the advantages of compact structure, low cost, low maintenance cost, and can flexibly adapt to different storage needs. This design enables liquid ammonia to be stored efficiently at low energy consumption, avoiding the high cost and complex maintenance of high-pressure containers in traditional storage methods. When the decompressed and cooled liquid ammonia enters the membrane tank 1, the gas phase pressure in the membrane tank 1 fluctuates due to the volume change of the liquid ammonia. In order to maintain the balance of pressure inside and outside the membrane tank 1, the pressure relief mechanism 3 starts to work. The pressure relief mechanism 3 releases gas through the pressure relief end located at the top of the membrane tank 1 to prevent the storage tank from rupturing or liquid ammonia leakage due to excessive pressure. In this process, the pressure relief mechanism 3 can accurately control the amount of released gas to ensure that the air pressure inside and outside the membrane tank 1 is always within a safe range. By introducing the pressure relief mechanism, the system avoids energy waste in traditional BOG (gas recovery) and pressure regulation systems. The pressure relief mechanism 3 not only improves the safety of the system, but also optimizes the overall energy efficiency performance by reducing dependence on additional energy supply. Next, the siphon infusion mechanism 4 realizes the transportation of liquid ammonia through negative pressure. The liquid ammonia input end of the siphon infusion mechanism 4 is connected to the liquid ammonia output end of the membrane tank 1. When the siphon infusion mechanism 4 generates negative pressure, the liquid ammonia will be sucked into the siphon infusion mechanism 4 from the membrane tank 1. Through this negative pressure delivery method, liquid ammonia can flow efficiently and smoothly, reducing the energy loss and mechanical wear existing in the traditional submersible pump delivery system. In the traditional system, the submersible pump needs to consume a large amount of electrical energy to transport liquid ammonia from the storage tank to the demand mechanism, while the siphon infusion mechanism 4 reduces the dependence on mechanical pumps through the natural principle of negative pressure, reduces energy consumption, and improves the operating efficiency of the system. At the same time, the design of the siphon infusion mechanism 4 makes it difficult for liquid ammonia to be disturbed by external factors during the flow process. Through precise negative pressure control, the system can achieve detailed regulation of the liquid ammonia flow rate to ensure the accurate delivery of liquid ammonia.This precise control method not only ensures a stable supply of liquid ammonia to demand mechanisms, but also avoids the situation of excess or insufficient liquid ammonia that may occur in traditional pumping systems, thereby further improving the reliability and stability of the system.

[0046] In summary, the temperature and pressure control mechanism 2 converts pressurized room-temperature liquid ammonia into decompressed and cooled liquid ammonia by means of decompression and cooling. In traditional storage systems, liquid ammonia usually needs to be kept in a high-pressure environment to maintain its liquid state, which not only requires a large amount of energy to maintain the high-pressure state, but also increases the technical complexity and safety hazards of the equipment. Through the temperature and pressure control mechanism 2, the liquid ammonia is decompressed and cooled when it is input into the system, and converted into low-temperature and normal-pressure liquid ammonia, avoiding the need for traditional high-pressure containers, thereby greatly reducing energy consumption during storage and transportation, and simplifying the equipment structure; the pressure relief mechanism 3 solves the problem of pressure changes caused by the decompressed and cooled liquid ammonia entering the storage tank by effectively discharging the gas phase in the membrane tank 1. The decompression and cooling of liquid ammonia will cause the gas volume to expand, and the pressure in the membrane tank 1 will change at this time. The pressure relief mechanism 3 can discharge gas in time when the liquid ammonia enters the membrane tank 1, avoiding the situation of excessive or uneven pressure in the tank, which not only ensures the safety of the tank body, but also ensures the stability and efficiency of the system operation; the siphon infusion mechanism 4 generates negative pressure to absorb the decompressed and cooled liquid ammonia from the membrane tank 1 and transport it to the demand mechanism. The siphon technology itself does not rely on an external energy source (such as a traditional submersible pump), but uses the principle of liquid ammonia deadweight and gas pressure difference to promote the flow of liquid ammonia. This method significantly reduces the energy consumption and maintenance costs of traditional pumping systems, and also reduces dependence on high-energy equipment, thereby improving the energy efficiency of the entire storage and transportation process. Especially in the transportation link of liquid ammonia, the siphon technology avoids the additional energy consumption and failure risks brought by mechanical pumps; by changing the liquid ammonia storage environment from high pressure to low temperature and normal pressure, and cooperating with effective pressure regulation and siphon delivery mechanism, the problems of low energy efficiency, poor safety and high maintenance cost faced in the storage and transportation of ammonia fuel are successfully solved. Ultimately, this innovative design not only reduces energy consumption and system complexity, but also improves the storage and delivery efficiency of ammonia fuel, promoting the application of ammonia as a clean energy.

[0047] Further, such as Figure 2 As shown, the temperature and pressure control mechanism 2 includes a liquid inlet cooling heat exchanger 21 and a liquid inlet pressure reducing valve 22. The liquid ammonia input end of the liquid inlet cooling heat exchanger 21 is used to receive pressurized liquid ammonia at room temperature. The liquid ammonia output end of the liquid inlet cooling heat exchanger 21 is connected to the liquid ammonia input end of the liquid inlet pressure reducing valve 22. The liquid ammonia output end of the liquid inlet pressure reducing valve 22 is connected to the liquid ammonia input end of the membrane tank 1.

[0048] The liquid inlet cooling heat exchanger 21 is used to cool the pressurized room-temperature liquid ammonia to generate pressurized cooled liquid ammonia, and output it to the liquid inlet pressure reducing valve 22 through the liquid ammonia output end of the liquid inlet cooling heat exchanger 21. The liquid inlet pressure reducing valve 22 is used to reduce the pressure of the pressurized cooled liquid ammonia to generate reduced-pressure cooled liquid ammonia, and output it to the membrane tank 1 through the liquid ammonia output end of the liquid inlet pressure reducing valve 22.

[0049] In this embodiment, the temperature and pressure control mechanism 2 converts the normal temperature pressurized liquid ammonia into the reduced pressure and cooled liquid ammonia through precise control steps, so that it can adapt to the storage conditions of the membrane tank 1. First, the liquid ammonia input end of the liquid inlet cooling heat exchanger 21 receives pressurized normal temperature liquid ammonia. This is because normal temperature pressurized liquid ammonia usually requires a higher pressure to maintain its liquid state, and after the pressurized liquid ammonia enters the liquid inlet cooling heat exchanger 21 under high pressure, it will undergo a cooling process. The liquid inlet cooling heat exchanger 21 reduces the temperature of the liquid ammonia through heat exchange with an external cold source. This process converts the pressurized normal temperature liquid ammonia into pressurized cooled liquid ammonia, that is, the temperature of the liquid ammonia is reduced, but a certain pressure is still maintained.

[0050] The pressure-reduced liquid ammonia flows out through the liquid ammonia output end of the liquid inlet cooling heat exchanger 21 and enters the liquid ammonia input end of the liquid inlet pressure reducing valve 22. The main function of the liquid inlet pressure reducing valve 22 is to further reduce the pressure of the liquid ammonia, so that the state of the liquid ammonia is suitable for storage. The pressure reducing valve reduces the pressure of the pressure-reduced liquid ammonia to a safe value, and transports the reduced-pressure and cooled liquid ammonia to the liquid ammonia input end of the membrane tank 1 through the liquid ammonia output end of the pressure reducing valve. At this time, the temperature and pressure of the liquid ammonia have reached the storage requirements of the membrane tank 1, that is, low-temperature and normal-pressure liquid ammonia.

[0051] Through this design, the cooperation between the liquid inlet cooling heat exchanger 21 and the liquid inlet pressure reducing valve 22 ensures that the liquid ammonia can be reduced in pressure while cooling, thereby effectively converting it into a liquid ammonia state suitable for storage in the membrane tank 1. After reducing pressure and cooling, the liquid ammonia flows into the membrane tank 1, ensuring that the internal and external pressures of the membrane tank 1 remain stable at all times, avoiding safety hazards caused by high pressure. At the same time, this process reduces the high-pressure equipment and its energy consumption required in traditional storage and transportation, and improves the energy efficiency and safety of the entire system. Therefore, the design of this temperature and pressure control mechanism 2 not only ensures that the storage conditions of liquid ammonia meet the technical requirements of the membrane tank 1, but also optimizes energy consumption and reduces system operating costs.

[0052] In summary, by cooling the pressurized room-temperature liquid ammonia through the liquid inlet cooling heat exchanger 21 in the temperature and pressure control mechanism 2, the temperature of the liquid ammonia can be brought into an appropriate range, ensuring the stability and safety of the subsequent treatment process, thereby reducing the risk of gasification or abnormal fluctuations of the liquid ammonia during transportation; by reducing the pressure of the pressurized temperature-reduced liquid ammonia through the liquid inlet pressure reducing valve 22, the pressure of the liquid ammonia can be further reduced, ensuring the safe storage of the liquid ammonia in the membrane tank 1, and also providing the required negative pressure conditions for siphon transportation, thereby optimizing the storage and transportation efficiency of the liquid ammonia.

[0053] Further, such as Figure 2 As shown, the temperature and pressure control mechanism 2 also includes a cold preservation coil 23 located in the film tank 1, and both ends of the cold preservation coil 23 are connected to a refrigeration mechanism so that a refrigerant flows in the cold preservation coil 23, thereby keeping the decompressed and cooled liquid ammonia cold.

[0054] In this embodiment, the temperature and pressure control mechanism 2 is further improved by adding a cold-keeping coil 23 in the film tank 1. The function of the cold-keeping coil 23 is to further control the temperature of the liquid ammonia that has been subjected to the decompression and temperature reduction treatment through the flowing refrigerant. Refrigeration mechanisms are respectively connected to the two ends of the cold-keeping coil 23, which are responsible for providing a cooling source for the coil. The refrigerant flows in the cold-keeping coil 23, and through the heat exchange with the liquid ammonia, the temperature of the liquid ammonia is maintained at a stable low temperature state. Specifically, the refrigerant cools the cold-keeping coil 23 and takes away its heat, so that the temperature of the liquid ammonia can be further reduced and maintained.

[0055] Through the control of the cold-keeping coil 23, the temperature of the decompressed and cooled liquid ammonia after entering the film tank 1 can be effectively maintained, avoiding the temperature rise of the liquid ammonia during the storage process. This is crucial for the safe storage of liquid ammonia, because at higher temperatures, liquid ammonia may evaporate, resulting in excessive pressure and increasing the risk of the storage system. The refrigeration mechanism and the cold-keeping coil 23 work together to ensure that the liquid ammonia is always kept at a low temperature and normal pressure, ensuring the safety and stability of the storage system. At the same time, this temperature control method continuously keeps the liquid ammonia cold through low-temperature refrigeration means. Compared with traditional equipment such as compressors with higher energy consumption, it can effectively reduce the energy consumption of the system and reduce maintenance costs, thereby improving the economy of the system.

[0056] Through this design, the temperature and pressure control mechanism 2 can not only convert the normal temperature pressurized liquid ammonia into the reduced temperature and cooled liquid ammonia by reducing the pressure, but also ensure the temperature stability of the liquid ammonia during the storage process through a continuous low temperature insulation system, thereby optimizing the storage and transportation conditions of the liquid ammonia, and also improving the safety and efficiency of the storage equipment.

[0057] In summary, by arranging the cold preservation coil 23 in the film tank 1 and connecting it to the refrigeration mechanism, the decompressed and cooled liquid ammonia can be continuously kept cold during the storage process of liquid ammonia, ensuring the temperature stability of the liquid ammonia during storage, thereby preventing the liquid ammonia from converting into a gaseous state due to temperature increase, avoiding leakage or excessive load on the compressor, and further improving the safety and reliability of the system.

[0058] Further, such as Figure 2 As shown, the pressure relief mechanism 3 includes a pressure relief control valve group 31 and a pressure relief exhaust venturi 32. The nitrogen input end of the pressure relief control valve group 31 is connected to the nitrogen supply mechanism, the nitrogen output end of the pressure relief control valve group 31 is connected to the nitrogen input end of the pressure relief exhaust venturi 32, the ammonia nitrogen input end of the pressure relief exhaust venturi 32 is connected to the pressure relief end at the top of the membrane tank 1, and the ammonia nitrogen output end of the pressure relief exhaust venturi 32 is used to output ammonia-containing nitrogen to the ammonia recovery mechanism.

[0059] In this embodiment, the design of the pressure relief mechanism 3 ensures that the pressure of the gas in the membrane tank 1 is effectively regulated through the cooperation of the pressure relief control valve group 31 and the pressure relief exhaust venturi 32, thereby maintaining the safe and stable operation of the system. The nitrogen input end of the pressure relief control valve group 31 is connected to the nitrogen supply mechanism, which means that the pressure relief control valve group 31 can receive nitrogen from the nitrogen supply mechanism. When the internal air pressure of the system changes due to the entry of liquid ammonia into the membrane tank 1, the pressure relief control valve group 31 adjusts the flow rate of nitrogen to ensure that the nitrogen can enter the pressure relief exhaust venturi 32 at an appropriate pressure.

[0060] The nitrogen output end of the pressure relief control valve group 31 is connected to the nitrogen input end of the pressure relief exhaust venturi 32. This connection mode allows the pressure relief control valve group 31 to adjust the flow of nitrogen and guide the nitrogen into the venturi through the nitrogen input end of the pressure relief exhaust venturi 32. The pressure relief exhaust venturi 32 is a device that uses the nitrogen flow principle to extract the gas in the membrane tank 1. It generates negative pressure through the acceleration of the nitrogen flow, thereby extracting the gas in the membrane tank 1.

[0061] The ammonia nitrogen input end of the pressure relief and exhaust venturi 32 is connected to the pressure relief end at the top of the membrane tank 1, so that the gas phase (mainly a mixture of ammonia and nitrogen) generated by the entry of the decompressed and cooled liquid ammonia in the membrane tank 1 will enter the pressure relief and exhaust venturi 32 through the pressure relief end. The pressure relief and exhaust venturi 32 uses its negative pressure effect to inhale these gases and discharge them through the ammonia nitrogen output end. The output gas contains a mixture of ammonia and nitrogen, which is transported to the ammonia recovery mechanism through the ammonia nitrogen output end.

[0062] The function of the ammonia recovery mechanism is to recover ammonia from these gases to reduce ammonia emissions in the environment and provide raw materials for possible subsequent reuse. Through the design of this system, the pressure relief mechanism 3 can automatically balance the internal pressure when the decompressed and cooled liquid ammonia enters the membrane tank 1, preventing excessive pressure from being generated inside the membrane tank 1 and avoiding damage or leakage of the storage tank. At the same time, through the continuous supply and reasonable control of nitrogen, the pressure relief process becomes efficient and safe, and it helps to recover ammonia, further improving the overall efficiency and environmental performance of the system. This efficient pressure regulation and gas recovery mechanism not only enhances the safety of the storage of the membrane tank 1, but also helps to reduce energy consumption and maintenance costs.

[0063] In summary, through the combined use of the pressure relief control valve group 31 and the pressure relief and exhaust venturi 32, when the decompressed and cooled liquid ammonia enters the membrane tank 1, the excess gas in the tank can be automatically adjusted and released, thereby maintaining the normal working pressure in the membrane tank 1 and preventing equipment damage or liquid ammonia leakage due to excessive gas pressure; by discharging ammonia nitrogen gas through the pressure relief and exhaust venturi 32 and transporting it to the ammonia recovery mechanism, the ammonia gas can be effectively recovered and reused, reducing environmental pollution and improving resource utilization.

[0064] Further, such as Figure 3 As shown, the siphon infusion mechanism 4 includes two siphon conveying components 41, a negative pressure control valve 42 and a negative pressure generating venturi tube 43, the liquid ammonia output end of the membrane tank 1 includes two output ports arranged in parallel, the liquid ammonia input end of the siphon conveying component 41 is connected to an output port, the liquid ammonia output end of the siphon conveying component 41 is connected to a liquid ammonia demand mechanism, the gas output end of the siphon conveying component 41 is connected to a first gas input end of the negative pressure generating venturi tube 43, the second gas input end of the negative pressure generating venturi tube 43 is connected to one end of the negative pressure control valve 42, the other end of the negative pressure control valve 42 is connected to a nitrogen supply mechanism, and the gas output end of the negative pressure generating venturi tube 43 is connected to an ammonia recovery mechanism.

[0065] In this embodiment, the siphon infusion mechanism 4 ensures the smooth delivery and efficient management of the decompressed and cooled liquid ammonia through the coordinated work of the various components that are carefully designed. The liquid ammonia output end of the membrane tank 1 is provided with two output ports arranged in parallel. Such a design enables the liquid ammonia to flow out of the membrane tank 1 with high flexibility and efficiency. Each output port guides the decompressed and cooled liquid ammonia into the siphon delivery component 41 by connecting the liquid ammonia input end of the siphon delivery component 41. The siphon delivery component 41 mainly uses the negative pressure principle to suck the liquid ammonia from the membrane tank 1 by means of the siphon effect and delivers it to the liquid ammonia demand mechanism.

[0066] The liquid ammonia output end of the siphon conveying component 41 is connected to the liquid ammonia demand mechanism to ensure that the decompressed and cooled liquid ammonia can be delivered to the demand end as needed, thereby meeting the liquid ammonia usage requirements of the system. At the same time, the gas output end of the siphon conveying component 41 is connected to the first gas input end of the negative pressure generating venturi tube 43 through a pipeline, and the special structure and fluid dynamics principle of the venturi tube are used to create negative pressure during the gas flow. The negative pressure generating venturi tube 43 sucks the gas flow of the siphon conveying component 41 through the first gas input end, and continues to act at the connection between the second gas input end and the negative pressure control valve 42.

[0067] The function of the negative pressure control valve 42 is to adjust the intensity of the negative pressure by controlling the flow of nitrogen. One end of the negative pressure control valve 42 is connected to the nitrogen supply mechanism, which means that the nitrogen supply mechanism can provide the required nitrogen to the negative pressure control valve 42 to adjust the negative pressure level in the negative pressure generating venturi tube 43. Through this design, the negative pressure control valve 42 and the nitrogen supply mechanism work together to maintain the stability of the negative pressure in the system, so as to ensure that the siphon effect of the siphon conveying component 41 is continuously effective, thereby ensuring the stable delivery of liquid ammonia.

[0068] The gas output end of the negative pressure generating venturi tube 43 is connected to the ammonia recovery mechanism. This design enables all gases (mainly a mixture of ammonia and nitrogen) generated by the siphon conveying component 41 in the membrane tank 1 to be introduced into the ammonia recovery mechanism. Through the processing of the ammonia recovery mechanism, the system can effectively recover the ammonia component in the gas to prevent its leakage from polluting the environment, while providing raw materials for possible reuse. Through the coordinated work of these precise components and connections, the siphon infusion mechanism 4 not only realizes efficient liquid ammonia delivery, but also ensures the high efficiency, stability and environmental protection performance of the system through negative pressure control and gas recovery, avoiding energy waste and environmental pollution caused by gas leakage.

[0069] In summary, by configuring the two siphon delivery components 41 in the siphon infusion mechanism 4, bidirectional delivery of liquid ammonia can be achieved, thereby improving the delivery flexibility and efficiency of the system; by the synergistic effect of the negative pressure control valve 42 and the negative pressure generating venturi tube 43, the flow direction of liquid ammonia can be effectively controlled by generating negative pressure, thereby ensuring that the liquid ammonia can be accurately delivered to the specified location according to demand, further optimizing the operating efficiency of the system.

[0070] Further, such as Figure 3As shown, the siphon conveying component 41 includes a siphon tank 411, a membrane drain valve 412, a siphon drain valve 413, a pressurizing valve 414 and a negative pressure generating valve 415. The membrane drain valve 412 is connected between the liquid ammonia input end and the output port of the siphon tank 411, the siphon drain valve 413 is connected between the liquid ammonia output end of the siphon tank 411 and the liquid ammonia demand mechanism, and the gas output end of the siphon tank 411 is connected to the nitrogen supply mechanism on the one hand, and is connected to the negative pressure generating valve 415 between the first gas input end of the negative pressure generating venturi tube 43 on the other hand;

[0071] When one of the siphon tanks 411 sucks in the reduced-pressure and cooled liquid ammonia, the pressurizing valve 414 and the siphon drain valve 413 are closed, and the negative pressure generating valve 415 and the membrane drain valve 412 are opened. When the negative pressure generating valve 415 is opened, the siphon tank 411 generates negative pressure due to the nitrogen flow through the negative pressure generating venturi tube 43, and then the reduced-pressure and cooled liquid ammonia enters the siphon tank 411 through the membrane drain valve 412;

[0072] At the same time, another negative pressure generating valve 415 and another membrane drain valve 412 are closed, another pressurizing valve 414 and another siphon drain valve 413 are opened, and the nitrogen flows into another siphon tank 411 through another pressurizing valve 414, thereby causing the reduced-pressure and cooled liquid ammonia to flow through another siphon drain valve 413 to transport the reduced-pressure and cooled liquid ammonia to the liquid ammonia demand mechanism.

[0073] In this embodiment, the design and operation process of the siphon delivery component 41 involves complex interactions between multiple valves and devices. Through the precise coordination of these devices, the stable delivery of the decompressed and cooled liquid ammonia is ensured. The liquid ammonia input end of the siphon tank 411 is connected to the output port of the membrane tank 1 through the membrane drain valve 412. The function of the membrane drain valve 412 is to control the flow of liquid ammonia into the siphon tank 411. The liquid ammonia output end of the siphon tank 411 is connected to the liquid ammonia demand mechanism through the siphon drain valve 413. The siphon drain valve 413 serves as a control valve to ensure that the liquid ammonia can be delivered to the liquid ammonia demand mechanism according to demand.

[0074] The gas output end of the siphon tank 411 is connected to the nitrogen supply mechanism and the first gas input end of the negative pressure generating venturi tube 43 through two pipelines. On the one hand, the gas output end is connected to the nitrogen supply mechanism through a pressure valve 414. The function of the pressure valve 414 is to control the inflow of nitrogen so as to provide stable pressure support and ensure the gas flow of the system. On the other hand, the gas output end is also connected to the first gas input end of the negative pressure generating venturi tube 43 through a negative pressure generating valve 415. The negative pressure generating valve 415 and the negative pressure generating venturi tube 43 work together to generate negative pressure by using the nitrogen flow through the venturi tube, thereby providing a negative pressure environment for the siphon tank 411 and starting the siphon effect.

[0075] When a siphon tank 411 needs to inhale decompressed and cooled liquid ammonia, the pressurizing valve 414 and the siphon drain valve 413 are closed, and the negative pressure generating valve 415 and the membrane drain valve 412 are opened. At this time, the opening of the negative pressure generating valve 415 allows nitrogen to flow through the negative pressure generating venturi tube 43. Due to the design principle of the venturi tube, local negative pressure will be generated when the gas flows through the pipeline, so that sufficient negative pressure is generated in the siphon tank 411, prompting the decompressed and cooled liquid ammonia to enter the siphon tank 411 through the membrane drain valve 412. In this way, the siphon tank 411 can absorb liquid ammonia from the membrane tank 1, start storage and prepare for transportation.

[0076] At the same time, the control system of the other siphon tank 411 is in the opposite state, wherein the other negative pressure generating valve 415 and the other film drain valve 412 are in the closed state, while the other pressurizing valve 414 and the siphon drain valve 413 are in the open state. At this time, nitrogen flows into the other siphon tank 411 through the other pressurizing valve 414, increasing the pressure in the siphon tank 411, causing the decompressed and cooled liquid ammonia to flow to the liquid ammonia demand mechanism through the siphon drain valve 413. Through this alternating control method, the two siphon tanks 411 can respectively inhale and transport liquid ammonia when needed, ensuring the continuous supply and efficient use of liquid ammonia in the system.

[0077] The control logic of the whole process realizes the alternating operation of the two siphon tanks 411 through the switching adjustment of the valve, which not only keeps the delivery of liquid ammonia stable, but also avoids the waste of liquid ammonia and environmental pollution through precise negative pressure control, ensuring the safety and efficiency of liquid ammonia delivery.

[0078] In summary, through the combined use of the siphon tank 411, the membrane drain valve 412, the siphon drain valve 413, the pressurizing valve 414 and the negative pressure generating valve 415 in the siphon conveying component 41, it is possible to realize automatic suction and delivery of liquid ammonia, avoid manual intervention, and ensure efficient operation under different working conditions; through the linkage of the negative pressure generating valve 415 and the negative pressure generating venturi tube 43, the required negative pressure can be quickly generated, so that the liquid ammonia enters the siphon tank 411 through the membrane drain valve 412, thereby realizing efficient liquid ammonia transmission, reducing system energy consumption and improving work efficiency.

[0079] Further, such as Figure 3 As shown, a liquid level sensor element 416 is provided on the siphon tank 411 , and a displacement control valve group 417 is provided between the siphon drain valve 413 and the liquid ammonia demand mechanism, and the liquid level sensor element 416 is electrically connected to the displacement control valve group 417 .

[0080] In this embodiment, the purpose of providing the liquid level sensor element 416 on the siphon tank 411 is to monitor the liquid level change of the liquid ammonia in the siphon tank 411 in real time, and ensure that the storage state of the liquid ammonia in the tank is always within a safe and normal range. The liquid level sensor element 416 can sense the liquid level height of the liquid ammonia, and transmit this information to the displacement control valve group 417 through an electrical connection. The displacement control valve group 417 adjusts the opening and closing of the valve according to the signal fed back by the liquid level sensor element 416, accurately controls the flow rate and flow velocity of the liquid ammonia, and ensures that when the liquid ammonia is transported from the siphon tank 411 to the liquid ammonia demand mechanism, it can be accurately controlled according to the actual demand.

[0081] The electrical connection between the liquid level sensor element 416 and the displacement control valve group 417 enables the system to automatically adjust the flow rate according to the real-time liquid level changes. For example, when the liquid level sensor element 416 detects that the liquid ammonia level in the siphon tank 411 is close to the set minimum value, it will send a signal to the displacement control valve group 417 to reduce the flow rate or stop the discharge to prevent excessive consumption of the liquid ammonia in the siphon tank 411; on the contrary, when the liquid level is too high, the liquid level sensor element 416 will remind the displacement control valve group 417 to increase the discharge volume to ensure that the liquid ammonia can be stably and continuously delivered to the liquid ammonia demand mechanism.

[0082] This control logic ensures that the storage and delivery of liquid ammonia in the siphon tank 411 are balanced, thereby avoiding excessive accumulation or insufficient delivery of liquid ammonia, ensuring efficient operation of the system, and effectively avoiding potential safety risks. Through the synergy between the liquid level sensor element 416 and the displacement control valve group 417, the system can automatically adjust the operation according to the actual demand for liquid ammonia, improving the intelligence and accuracy of the entire liquid ammonia delivery process.

[0083] In summary, by arranging a liquid level sensor element 416 on the siphon tank 411 and electrically connecting it to the displacement control valve group 417, the liquid level change of the liquid ammonia in the siphon tank 411 can be monitored in real time, and the liquid ammonia delivery amount can be dynamically adjusted according to the liquid level change, thereby avoiding overfull or insufficient liquid ammonia storage, ensuring a stable supply of liquid ammonia and reducing the risk of unexpected shutdown of the system or waste of liquid ammonia.

[0084] Further, such as Figure 2 As shown, a monitoring component 11 is provided on the membrane tank 1, and the monitoring component 11 includes a liquid level meter, a temperature-variable sensing element, and a pressure-variable sensing element.

[0085] In this embodiment, the monitoring component 11 on the membrane tank 1 includes a liquid level meter, a temperature-dependent sensor element, and a pressure-dependent sensor element. Their main task is to monitor the key parameters inside the membrane tank 1 in real time, so as to ensure the safety and stability of liquid ammonia storage and transportation. The liquid level meter is used to monitor the liquid level changes of liquid ammonia in the membrane tank 1. Its function is to ensure that the liquid ammonia does not exceed the safe storage range and avoid operational risks caused by excessively high or low liquid ammonia levels. The liquid level meter senses the liquid ammonia level in real time, and feeds back the value to the control system, and cooperates with other control logics to adjust the liquid ammonia flow or activate the corresponding alarm mechanism.

[0086] The temperature-variable sensing element and the pressure-variable sensing element are used to monitor the temperature change and pressure change of the liquid ammonia in the membrane tank 1, respectively. The temperature-variable sensing element can detect the temperature fluctuation caused by environmental or internal changes during the storage and transportation of liquid ammonia, ensure the storage and flow of liquid ammonia within a safe temperature range, and prevent the liquid ammonia from changing phase due to low temperature or affecting the stability of the system due to high temperature. The pressure-variable sensing element is used to monitor the pressure change inside the membrane tank 1 in real time, and timely feedback the increase or decrease of the pressure in the tank to prevent system failure or equipment damage caused by excessive or low pressure.

[0087] These sensor elements are electrically connected to the control system of the membrane tank 1, and the real-time data fed back by the level meter, temperature-variable sensor element and pressure-variable sensor element will be monitored and analyzed by the system. According to the changes in the liquid level, temperature and pressure of liquid ammonia, the control system can timely adjust the working status of related equipment, such as adjusting the delivery flow of liquid ammonia, starting and stopping the temperature control mechanism, adjusting the pressure relief or pressurization, etc., to ensure that the entire membrane tank 1 storage and delivery system is in a safe and efficient operating state. Through this integrated monitoring system, it can dynamically respond to changes in the internal environment of the membrane tank 1, improve the automation and intelligence level of the liquid ammonia storage process, and ensure the efficiency and stability of the system.

[0088] In summary, by arranging a monitoring component 11 on the membrane tank 1, including a liquid level meter, a temperature-variable sensor element and a pressure-variable sensor element, the storage status of liquid ammonia can be monitored in real time to ensure that the storage conditions of liquid ammonia meet the requirements, thereby reducing the risk of equipment failure and liquid ammonia leakage and improving the safety of the system; through real-time feedback of monitoring data, it can provide the system with accurate control basis, further improving the automation and intelligence level of the system.

[0089] Further, such as Figure 2 As shown, a membrane storage siphon tank type conveying system includes a nitrogen protection mechanism 5, which includes an intake pressure control valve group 51. One end of the intake pressure control valve group 51 is connected to the nitrogen supply mechanism, and the other end is connected to the membrane tank 1. The intake pressure control valve group 51 is electrically connected to the monitoring component 11.

[0090] In this embodiment, the nitrogen protection mechanism 5 is designed to ensure that the ammonia environment in the membrane tank 1 remains stable and prevent safety problems caused by changes in the external environment or internal operations. The nitrogen protection mechanism 5 includes an intake pressure control valve group 51, one end of which is connected to the nitrogen supply mechanism, and the other end is connected to the membrane tank 1. The logic of this connection relationship is that the nitrogen supply mechanism provides the necessary nitrogen, and the intake pressure control valve group 51 controls the entry and pressure of nitrogen to ensure that a certain nitrogen pressure is always maintained inside the membrane tank 1 to avoid negative effects caused by fluctuations in the external environment or volatilization of liquid ammonia. Through a stable nitrogen environment, the contact between oxygen and ammonia can be prevented, reducing the safety hazards caused by excessive oxygen.

[0091] The air intake pressure control valve group 51 is electrically connected to the monitoring component 11, which means that the air intake pressure control valve group 51 interacts with the monitoring system in the membrane tank 1 in real time. By feeding back the values ​​of the liquid level gauge, temperature-variable sensor element and pressure-variable sensor element, the control valve group can automatically adjust the nitrogen intake volume and pressure according to the liquid level, temperature and pressure changes in the membrane tank 1, thereby ensuring that the nitrogen supply is consistent with the changes in the environment in the tank. The data changes of the monitoring component 11 will directly affect the action of the air intake pressure control valve group 51, allowing it to be accurately adjusted when necessary to avoid the situation where the nitrogen pressure is too high or too low, thereby ensuring the stability and efficiency of the nitrogen protection system. Through the coordinated work of this system, the ammonia environment in the membrane tank 1 is effectively protected, which helps to ensure the safe storage and smooth transportation of liquid ammonia.

[0092] In summary, through the intake pressure control valve group 51 in the nitrogen protection mechanism 5, nitrogen can be continuously supplied to the membrane tank 1, the air pressure in the membrane tank 1 can be stabilized, and liquid ammonia leakage or danger can be prevented; by electrically connecting the intake pressure control valve group 51 to the monitoring component 11, the input amount of nitrogen can be automatically adjusted according to the monitoring data to ensure that the air pressure in the membrane tank 1 is always within a safe range, thereby improving the safety and reliability of the system.

[0093] Further, such as Figure 2 As shown, the nitrogen protection mechanism 5 further includes an exhaust pressure control valve group 52, one end of the exhaust pressure control valve group 52 is connected to the membrane tank 1, and the other end is connected to the ammonia recovery mechanism for recovering nitrogen.

[0094] In this embodiment, the exhaust pressure control valve group 52 in the nitrogen protection mechanism 5 is used to adjust the discharge of nitrogen in the membrane tank 1, ensure the stability of the nitrogen pressure in the tank, and be able to recover excess nitrogen in time to avoid nitrogen waste or abnormal pressure. One end of the exhaust pressure control valve group 52 is connected to the membrane tank 1, and the other end is connected to the ammonia recovery mechanism. The function of this connection logic is that when the nitrogen pressure in the membrane tank 1 reaches a predetermined value, the exhaust pressure control valve group 52 will automatically open to discharge excess nitrogen. After the nitrogen is discharged, it will be introduced into the recovery system for processing or storage through the connection with the ammonia recovery mechanism to ensure that the nitrogen can be reused to avoid waste.

[0095] The working process of the exhaust pressure control valve group 52 is closely related to the environmental conditions in the membrane tank 1. When the gas pressure in the membrane tank 1 is too high, which may be caused by the increase in external temperature, the volatilization of liquid ammonia in the tank or other reasons, the exhaust pressure control valve group 52 will automatically adjust the exhaust volume and recover the excess nitrogen through the ammonia recovery mechanism to avoid nitrogen leakage. On the contrary, if the gas pressure in the tank is too low, the exhaust pressure control valve group 52 will be closed to prevent nitrogen from being lost too quickly and keep the nitrogen pressure in the tank within a safe range.

[0096] This design ensures the stability of nitrogen inside the membrane tank 1, and at the same time reduces resource consumption through the recycling of nitrogen, improving the economy and environmental protection of the system. By accurately adjusting the intake and exhaust process of nitrogen, the nitrogen protection mechanism 5 effectively prevents the negative impact on the safety of the membrane tank 1 caused by nitrogen pressure fluctuations.

[0097] In summary, by combining the exhaust pressure control valve group 52 with the ammonia recovery mechanism, nitrogen can be discharged and recovered after passing through the exhaust pressure control valve group 52, reducing gas waste, and the recovered nitrogen can be used for other purposes or re-injected into the system, thereby improving the resource utilization of nitrogen, reducing environmental pollution, and providing the system with more energy and operating cost savings.

[0098] Specifically, the liquid inlet pressure reducing valve 22 ensures that the liquid ammonia that has been supercooled by the liquid inlet cooling heat exchanger 21 is decompressed to normal pressure and then flows into the film tank. The cold preservation coil 23 mainly ensures that the pressurized normal temperature liquid ammonia is cooled to -35°C (supercooled). The film tank 1 avoids heating and gasification when storing low-temperature and normal pressure liquid ammonia (i.e., when decompressing and cooling liquid ammonia), and avoids gasification during temporary storage by the siphon infusion mechanism 4. Usually, the liquid inlet cooling heat exchanger 21 and its matching heat exchanger outlet temperature variable linkage control refrigerant flow to ensure that the pressurized normal temperature liquid ammonia is cooled to the target temperature. The monitoring component 11 is used to monitor the film tank 1. The temperature of the liquid in the siphon tank 411 is controlled by the temperature change linkage at the top of the cooling heat exchange coil and the liquid ammonia buffer tank (not shown in the figure, i.e., the component in the liquid ammonia demand mechanism) to reduce the pressure and cool the liquid ammonia inside. The pressure relief control valve group 31 controls the flow of nitrogen introduced to control the pressure relief exhaust venturi 32 to extract the amount of vaporized ammonia gas in the membrane tank 1 to control the pressure in the membrane tank 1. The liquid ammonia siphon line (i.e., the liquid ammonia output end of the membrane tank 1) goes deep into the bottom of the tank body, eliminating the submerged structure like a submerged pump, and there is no power mechanical device, so the cost is low. The nitrogen protection mechanism 5 is generally used as the entire membrane tank when it is replaced or swept or in case of fire or leakage;

[0099] The pressurized room-temperature liquid ammonia first enters the liquid inlet cooling heat exchanger 21 from the filling mechanism. The refrigerant in the shell of the heat exchanger continuously convects the liquid ammonia to cool it down, and at the same time ensures that the liquid ammonia is cooled to -35°C. It is decompressed to about 30~10KPa at normal pressure through the liquid inlet pressure reducing valve 22 and then enters the membrane tank 1. The liquid inlet metering pressure reducing instrument will measure and record the decompressed and cooled liquid ammonia flowing through. The temperature of the decompressed and cooled liquid ammonia is about -35°C at this time. When liquid enters the membrane tank 1, the volume of the membrane tank 1 will change, and the gas phase in the original space will be discharged by the pressure relief mechanism 3. When the decompressed and cooled liquid ammonia enters the tank, it compresses the gas phase in the upper space to cause pressure changes. The pressure relief control valve group 31 will open the nitrogen flow through the pressure relief exhaust venturi 32 and extract the gasified ammonia gas in the membrane tank 1, and at the same time, it is ensured by continuously adjusting the pressure change in the monitoring component 11 of the membrane tank 1. The nitrogen flow of the pressure relief control valve group 31 controls the pressure of the membrane tank 1 and maintains it within the normal range. When the liquid ammonia filling membrane tank 1 reaches the specified liquid level, the filling can be stopped; the cold preservation coil 23 will work continuously, and the cooling heat exchange coil of the membrane tank 1 and the monitoring component 11 will be adjusted continuously to ensure that the liquid ammonia in the membrane tank 1 is always in a supercooled state and that the liquid ammonia is not vaporized. At this time, the pressure relief mechanism 3 will also be opened and adjusted according to the pressure of the membrane tank 1. When the liquid ammonia consumption equipment needs the siphon infusion mechanism 4 to start working. The liquid ammonia buffer tank is generally a group of , one pressure reducing tank absorbs liquid and the other tank boosts the pressure to discharge liquid, to ensure that the liquid ammonia can be continuously transported.

[0100] When a siphon tank 411 absorbs liquid, a negative pressure generating valve 415 and a membrane drain valve 412 are opened, a pressurizing valve 414 and a siphon drain valve 413 are closed, and the nitrogen supply mechanism is opened. When nitrogen flows through the negative pressure generating venturi tube 43, a slight negative pressure is generated inside the siphon tank 411 to ensure that the decompressed and cooled liquid ammonia can flow into the siphon tank 411. The amount of liquid in the siphon tank 411 can be known by the equipped liquid level meter; at this time, the other siphon tank 411 starts to discharge liquid, that is, the other negative pressure generating valve 415 and another membrane drain valve 412 are closed, another pressurizing valve 414 and another siphon drain valve 413 are opened. When draining, attention should be paid to pressurizing the tank first, and then opening the siphon drain valve 413 after reaching the target pressure; when a siphon tank 411 absorbs liquid and the liquid level reaches the target value, a negative pressure generating valve 415 and a membrane drain valve 412 are closed, and liquid ammonia no longer enters, and then the drainage steps of another siphon tank 411 are followed to drain, so that the two siphon tanks 411 are alternately carried out to achieve continuous drainage. When the siphon absorbs liquid, the pressure of the membrane tank 1 will also change, so it is also necessary to open the nitrogen protection of the nitrogen protection mechanism 5 at this time, and the intake pressure control valve group 51 enters an appropriate amount of nitrogen to adjust the pressure in the balance tank, and the excess nitrogen passes through the pressure relief control valve group 31. The pressure relief control valve group 31 controls the nitrogen flow rate to control the pressure relief exhaust venturi 32 to extract the amount of nitrogen in the membrane tank 1 to control the pressure.

[0101] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0102] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A film storage siphon tank conveying system, characterized in that: The film storage siphon tank type conveying system comprises a film tank (1), a temperature and pressure control mechanism (2), a pressure relief mechanism (3) and a siphon infusion mechanism (4); The liquid ammonia input end of the temperature and pressure control mechanism (2) is used to receive pressurized room-temperature liquid ammonia, and the temperature and pressure control mechanism (2) is used to reduce the pressure and temperature of the pressurized room-temperature liquid ammonia to generate reduced-pressure and reduced-temperature liquid ammonia. The liquid ammonia output end of the temperature and pressure control mechanism (2) is connected to the liquid ammonia input end of the membrane tank (1), so that the membrane tank (1) receives the reduced-pressure and reduced-temperature liquid ammonia; The gas input end of the pressure relief mechanism (3) is connected to the pressure relief end located at the top of the membrane tank (1). When the decompressed and cooled liquid ammonia enters the membrane tank (1), the gas phase in the membrane tank (1) is discharged to the pressure relief mechanism (3) through the pressure relief end at the top of the membrane tank (1) to balance the pressure change caused by the decompressed and cooled liquid ammonia entering the membrane tank (1); The liquid ammonia input end of the siphon infusion mechanism (4) is connected to the liquid ammonia output end of the membrane tank (1); the siphon infusion mechanism (4) is used to generate negative pressure to suck the decompressed and cooled liquid ammonia into the siphon infusion mechanism (4) through the liquid ammonia output end of the membrane tank (1); the liquid ammonia output end of the siphon infusion mechanism (4) is used to output the decompressed and cooled liquid ammonia to the liquid ammonia demand mechanism.

2. A film storage siphon tank conveying system according to claim 1, characterized in that: The temperature and pressure control mechanism (2) comprises a liquid inlet cooling heat exchanger (21) and a liquid inlet pressure reducing valve (22); the liquid ammonia input end of the liquid inlet cooling heat exchanger (21) is used to receive pressurized liquid ammonia at room temperature; the liquid ammonia output end of the liquid inlet cooling heat exchanger (21) is connected to the liquid ammonia input end of the liquid inlet pressure reducing valve (22); and the liquid ammonia output end of the liquid inlet pressure reducing valve (22) is connected to the liquid ammonia input end of the membrane tank (1); The liquid inlet cooling heat exchanger (21) is used to cool the pressurized room-temperature liquid ammonia to generate pressurized cooled liquid ammonia, and outputs the pressurized cooled liquid ammonia to the liquid inlet pressure reducing valve (22) through the liquid ammonia output end of the liquid inlet cooling heat exchanger (21). The liquid inlet pressure reducing valve (22) is used to reduce the pressure of the pressurized cooled liquid ammonia to generate reduced-pressure cooled liquid ammonia, and outputs the pressurized cooled liquid ammonia to the membrane tank (1) through the liquid ammonia output end of the liquid inlet pressure reducing valve (22).

3. A film storage siphon tank conveying system according to claim 1, characterized in that: The temperature and pressure control mechanism (2) also includes a cold preservation coil (23) located in the film tank (1), and both ends of the cold preservation coil (23) are connected to a refrigeration mechanism so that a refrigerant flows in the cold preservation coil (23), thereby keeping the reduced-pressure and reduced-temperature liquid ammonia cold.

4. A film storage siphon tank conveying system according to claim 1, characterized in that: The pressure relief mechanism (3) comprises a pressure relief control valve group (31) and a pressure relief exhaust venturi (32); the nitrogen input end of the pressure relief control valve group (31) is connected to the nitrogen supply mechanism; the nitrogen output end of the pressure relief control valve group (31) is connected to the nitrogen input end of the pressure relief exhaust venturi (32); the ammonia nitrogen input end of the pressure relief exhaust venturi (32) is connected to the pressure relief end at the top of the membrane tank (1); and the ammonia nitrogen output end of the pressure relief exhaust venturi (32) is used to output ammonia-containing nitrogen to the ammonia recovery mechanism.

5. The film storage siphon tank conveying system according to claim 1, characterized in that: The siphon infusion mechanism (4) comprises two siphon conveying components (41), a negative pressure control valve (42) and a negative pressure generating venturi tube (43); the liquid ammonia output end of the membrane tank (1) comprises two output ports arranged in parallel; the liquid ammonia input end of the siphon conveying component (41) is connected to one of the output ports; the liquid ammonia output end of the siphon conveying component (41) is connected to a liquid ammonia demand mechanism; the gas output end of the siphon conveying component (41) is connected to a first gas input end of the negative pressure generating venturi tube (43); the second gas input end of the negative pressure generating venturi tube (43) is connected to one end of the negative pressure control valve (42); the other end of the negative pressure control valve (42) is connected to a nitrogen supply mechanism; and the gas output end of the negative pressure generating venturi tube (43) is connected to an ammonia recovery mechanism.

6. A film storage siphon tank conveying system according to claim 5, characterized in that: The siphon conveying component (41) comprises a siphon tank (411), a membrane drain valve (412), a siphon drain valve (413), a pressurizing valve (414) and a negative pressure generating valve (415); the membrane drain valve (412) is connected between the liquid ammonia input end of the siphon tank (411) and the output port; the siphon drain valve (413) is connected between the liquid ammonia output end of the siphon tank (411) and the liquid ammonia demand mechanism; the pressurizing valve (414) is connected between the gas output end of the siphon tank (411) and the nitrogen supply mechanism on the one hand, and the negative pressure generating valve (415) is connected between the gas output end of the siphon tank (411) and the first gas input end of the negative pressure generating venturi tube (43) on the other hand; When one of the siphon tanks (411) absorbs the reduced-pressure and cooled liquid ammonia, the pressurizing valve (414) and the siphon drain valve (413) are closed, and the negative pressure generating valve (415) and the membrane drain valve (412) are opened. When the negative pressure generating valve (415) is opened, the nitrogen gas flows through the negative pressure generating venturi tube (43), causing the siphon tank (411) to generate negative pressure, thereby causing the reduced-pressure and cooled liquid ammonia to enter the siphon tank (411) through the membrane drain valve (412); At the same time, the other negative pressure generating valve (415) and the other membrane drain valve (412) are closed, the other pressurizing valve (414) and the other siphon drain valve (413) are opened, and the nitrogen flows through the other pressurizing valve (414) to the other siphon tank (411), thereby causing the reduced-pressure and cooled liquid ammonia to flow through the other siphon drain valve (413) to transport the reduced-pressure and cooled liquid ammonia to the liquid ammonia demand mechanism.

7. A film storage siphon tank conveying system according to claim 6, characterized in that: The siphon tank (411) is provided with a liquid level sensor element (416), a displacement control valve group (417) is provided between the siphon drain valve (413) and the liquid ammonia demand mechanism, and the liquid level sensor element (416) is electrically connected to the displacement control valve group (417).

8. The film storage siphon tank conveying system according to claim 1, characterized in that: The membrane tank (1) is provided with a monitoring component (11), and the monitoring component (11) comprises a liquid level meter, a temperature-variable sensing element and a pressure-variable sensing element.

9. A film storage siphon tank conveying system according to claim 8, characterized in that: The membrane storage siphon tank type conveying system comprises a nitrogen protection mechanism (5), wherein the nitrogen protection mechanism (5) comprises an intake pressure control valve group (51), wherein one end of the intake pressure control valve group (51) is connected to a nitrogen supply mechanism, and the other end is connected to a membrane tank (1), and the intake pressure control valve group (51) is electrically connected to the monitoring component (11).

10. A film storage siphon tank conveying system according to claim 9, characterized in that: The nitrogen protection mechanism (5) further comprises an exhaust pressure control valve group (52), one end of the exhaust pressure control valve group (52) is connected to the membrane tank (1), and the other end is connected to the ammonia recovery mechanism for recovering nitrogen.

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