Low-speed machine ammonia leakage and tail gas detection simulation platform for ammonia fuel ship

Abstract

The invention discloses a low-speed machine ammonia leakage and tail gas detection simulation platform for an ammonia fuel ship, which comprises a pressure container, a gas injection unit, a temperature adjusting unit, a pressure adjusting unit, an oil mist injection unit and a detection unit, and is characterized in that the gas injection unit is communicated with the pressure container to inject target gas into the pressure container; the temperature adjusting unit is communicated with the pressure container so as to inject hot air into the pressure container; the pressure adjusting unit is communicated with the pressure container to adjust the air pressure in the pressure container; the oil mist injection unit is communicated with the pressure container so as to inject oil mist into the pressure container; the detection unit is communicated with the pressure container so as to detect target gas in the mixed gas in the pressure container. Compared with the prior art, the platform has the advantages that ammonia leakage gas and tail gas containing unconventional emissions under different working conditions of the low-speed machine can be mixed in the pressure container, and the detection unit is used for detection, so that the detection function and the detection precision of the detection unit under different working conditions of the low-speed machine are verified.

Description

Technical Field

[0001] The invention relates to the field of ammonia fuel ships, and in particular to an ammonia leakage and exhaust gas detection simulation platform for ammonia fuel ship low-speed engines. Background Art

[0002] Ammonia is a classic chemical product and a typical carbon-free fuel. Gaseous ammonia can be liquefied at about 7 to 8 atmospheres of pressure at room temperature. A relatively complete ammonia production, storage and transportation infrastructure has been established around the world. Ammonia has a high octane number and good anti-explosion performance, which facilitates the promotion of ammonia as a fuel. Although ammonia has the above advantages as a fuel, in actual applications, ammonia leakage is a serious industrial accident that has significant harm to the human body: ammonia has a strong irritating smell and can irritate the eyes and respiratory tract, causing tears, redness, swelling, coughing, and difficulty breathing; contact with the skin or mucous membranes may cause burns, redness, swelling or ulcers, and inhalation of high concentrations of ammonia can cause headaches, dizziness, nausea, vomiting, and coma. Long-term exposure to low concentrations may damage lung function and increase the risk of chronic respiratory diseases.

[0003] Ammonia fueled marine low-speed engines are currently in the R&D test stage, and the detection system for ammonia leakage and the detection system for unconventional exhaust emissions suitable for ammonia fueled marine low-speed engines are also being developed simultaneously. In order to verify and evaluate the functions and accuracy of the ammonia leakage detection system and the unconventional exhaust emissions detection system, a special test bench that can simulate the ammonia leakage scenario of ammonia fueled marine low-speed engines and unconventional emissions is required. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose an ammonia leakage and exhaust gas detection simulation platform for ammonia fueled marine low-speed engines, so as to solve the technical problem that there is a lack of a platform in the prior art that can simulate ammonia leakage and unconventional emissions of ammonia fueled marine low-speed engines, so as to verify and evaluate the functions and accuracy of the ammonia leakage detection system and the exhaust gas unconventional emissions detection system.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides an ammonia leakage and exhaust gas detection simulation platform for an ammonia fuel marine low-speed engine, comprising: a pressure vessel; a gas injection unit, the gas injection unit is connected to the pressure vessel to inject a target gas into the pressure vessel; a temperature regulating unit, the temperature regulating unit is connected to the pressure vessel to inject hot air into the pressure vessel; a pressure regulating unit, the pressure regulating unit is connected to the pressure vessel to regulate the air pressure in the pressure vessel; an oil mist injection unit, the oil mist injection unit is connected to the pressure vessel to inject oil mist into the pressure vessel; and a detection unit, the detection unit is connected to the pressure vessel to detect the target gas in the mixed gas in the pressure vessel.

[0006] In some embodiments, the gas injection unit includes a gas supply module, a first pressure reducing valve, a first flow meter and a first pipeline. The gas supply module is connected to the pressure vessel through the first pipeline. The first pressure reducing valve and the first flow meter are arranged on the first pipeline for adjusting the flow rate of the target gas.

[0007] In some embodiments, the gas injection unit further includes a fiber grating sensor and / or an electrochemical sensor, and the fiber grating sensor and / or the electrochemical sensor are disposed on the first pipeline to detect whether the target gas is leaking.

[0008] In some embodiments, the temperature regulating unit includes an air compressor, a second pipeline and an air heater. The air compressor is connected to the pressure container through the second pipeline, and the air heater is arranged on the second pipeline to heat the air.

[0009] In some embodiments, the temperature regulating unit also includes an air cylinder, a second pressure reducing valve and a second flow meter. The air compressor is connected to the air cylinder, and the air cylinder is connected to the pressure container through a second pipe. The second pressure reducing valve and the second flow meter are arranged on the second pipe for measuring and adjusting the flow of air.

[0010] In some embodiments, the temperature regulating unit further includes a temperature sensor and a temperature controller. The temperature sensor is disposed in the pressure vessel, and the temperature sensor is connected to the air heater signal control via the temperature controller.

[0011] In some embodiments, the temperature regulating unit further includes a filter, and the filter is disposed on the second pipe to filter particulate matter in the air.

[0012] In some embodiments, the pressure regulating unit includes a third pipeline, a pressure regulating valve and a pressure sensor. One end of the third pipeline is connected to the pressure container, and the other end forms an air vent. The pressure regulating valve is arranged on the third pipeline, and the pressure sensor is arranged in the pressure container and is connected to the pressure regulating valve signal control.

[0013] In some embodiments, the oil mist injection unit includes an oil supply module, a compressed air supply module, an oil mist collector and a fourth pipe. The compressed air supply module is connected to the pressure container through the fourth pipe. The oil mist collector is arranged on the fourth pipe and connected to the oil supply module. The oil mist collector can atomize the oil into oil mist and mix it with the compressed air to transport it into the pressure container.

[0014] In some embodiments, the detection unit includes an ammonia leakage pretreatment device and detection system and an exhaust gas pretreatment device and detection system.

[0015] Compared with the prior art, the ammonia leakage and exhaust gas detection simulation platform for ammonia-fueled marine low-speed engines provided by the present invention can mix ammonia leakage gas and exhaust gas containing unconventional emissions under different operating conditions of the low-speed engine in a pressure vessel, and use a detection unit to perform detection, thereby verifying the detection function and detection accuracy of the detection unit under different operating conditions of the low-speed engine, thereby providing data support for improving the detection accuracy of the detection unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : is a schematic diagram of the structure of an ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines provided by an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the local structure of the first pipeline. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] In order to solve the technical problem of lack of a platform capable of simulating ammonia leakage and unconventional emissions of ammonia-fueled marine low-speed engines to verify and evaluate the functions and accuracy of ammonia leakage detection systems and exhaust unconventional emissions detection systems, the present invention provides an ammonia leakage and exhaust gas detection simulation platform for ammonia-fueled marine low-speed engines (hereinafter referred to as low-speed engines), which can mix ammonia leakage gas and exhaust gas containing unconventional emissions under different operating conditions of the low-speed engine in a pressure vessel, and use a detection unit to detect them, thereby verifying the detection function and detection accuracy of the detection unit under different operating conditions of the low-speed engine, thereby providing data support for improving the detection accuracy of the detection unit.

[0019] It should be noted that the ammonia leakage and exhaust gas detection simulation platform for ammonia-fueled marine low-speed engines described in the present invention is used for but not limited to simulating the gas generated when ammonia leaks from ammonia-fueled marine low-speed engines. For the convenience of explanation, in the present invention, only the ammonia leakage and exhaust gas detection simulation platform for ammonia-fueled marine low-speed engines is used to simulate the gas generated when ammonia leaks from ammonia-fueled marine low-speed engines as an example for explanation. The principle of simulating other gases by the ammonia leakage and exhaust gas detection simulation platform for ammonia-fueled marine low-speed engines is substantially the same as the principle of simulating the gas generated when ammonia leaks, which will not be elaborated here.

[0020] See also Figure 1 , Figure 1This is a structural schematic diagram of an ammonia leakage and exhaust gas detection simulation platform for an ammonia-fueled marine low-speed engine in one embodiment of the present invention. The ammonia leakage and exhaust gas detection simulation platform for an ammonia-fueled marine low-speed engine includes a pressure vessel 1, a gas injection unit 2, a temperature regulating unit 3, a pressure regulating unit 4, an oil mist injection unit 5 and a detection unit 6.

[0021] The pressure vessel 1 is used to simulate the gas generated by ammonia leakage or the exhaust gas containing unconventional emissions. In order to simulate the actual working conditions of the marine low-speed engine, the pressure vessel 1 can withstand a certain temperature and pressure. It is also preferably provided with a safety valve 11. When the internal pressure of the pressure vessel 1 increases abnormally, the pressure can be released through the safety valve 11 to avoid accidents.

[0022] The gas injection unit 2 is connected to the pressure vessel 1 to inject the target gas, ie, ammonia or tail gas containing unconventional emissions, into the pressure vessel 1 .

[0023] The temperature regulating unit 3 is communicated with the pressure vessel 1 to inject hot air into the pressure vessel 1 so that the temperature and pressure of the mixed gas in the pressure vessel 1 meet the requirements.

[0024] The pressure regulating unit 4 is communicated with the pressure container 1 to regulate the gas pressure in the pressure container 1 .

[0025] The oil mist injection unit 5 is in communication with the pressure vessel 1 to inject oil mist into the pressure vessel 1 , thereby simulating the oil mist environment in the scavenging box or the crankcase.

[0026] The detection unit 6 is connected to the pressure vessel 1, and the mixed gas in the pressure vessel 1 can be transported to the detection unit 6, and the detection unit 6 detects the target gas therein. Since the actual content of the target gas is known, the detection value of the detection unit 6 reflects the detection accuracy of the detection unit 6.

[0027] In some embodiments, the gas injection unit 2 includes a gas supply module 21, a first pressure reducing valve 22, a first flow meter 23 and a first pipeline 24. The gas supply module 21 is connected to the pressure vessel 1 through the first pipeline 24, and the first pressure reducing valve 22 and the first flow meter 23 are arranged on the first pipeline 24. The gas supply module 21 can use a gas storage tank or a gas supply pipeline to supply ammonia (liquid ammonia) and unconventional emissions. The first pressure reducing valve 22 is used to reduce the pressure of the target gas to a suitable size, and the first flow meter 23 is used to measure and adjust the flow rate of the target gas so that the target gas is quantitatively added to the pressure vessel 1. Since it is necessary to simulate ammonia leakage and tail gas containing unconventional emissions, two sets of gas injection units can be used to inject ammonia and unconventional emissions respectively, and connected by a three-way valve, and some pipelines are shared to reduce costs.

[0028] See also Figure 2In a preferred embodiment, a fiber grating sensor 25 and / or an electrochemical sensor 26 may be provided in a section A of the first pipe 24, and the fiber grating sensor 25 and / or the electrochemical sensor 26 are used to detect whether the target gas is leaking.

[0029] In some embodiments, the temperature regulating unit 3 includes an air compressor 31, a second pipe 32, and an air heater 33. The air compressor 31 is connected to the pressure vessel 1 through the second pipe 32, and the air heater 33 is arranged on the second pipe 32 to heat the air. The air compressor 31 drives the air into the pressure vessel 1, and the air is heated by the air heater 33 during the process of flowing in the second pipe 32. The air enters the pressure vessel 1 to increase the temperature and air pressure in the pressure vessel 1.

[0030] In some embodiments, the temperature regulating unit 3 also includes an air cylinder 34, a second pressure reducing valve 35 and a second flow meter 36. The air compressor 31 is connected to the air cylinder 34, and the air cylinder 34 is connected to the pressure vessel 1 through the second pipe 32. The second pressure reducing valve 35 and the second flow meter 36 are arranged on the second pipe 32. When conducting experiments, in order to meet the input rate requirements of hot air, very high performance requirements are put forward for the air compressor 31. In order to reduce costs, an air cylinder 34 can be set, and the air compressor 31 compresses the air and stores it in the air cylinder 34 in advance, and then uses the air cylinder 34 to provide compressed air when conducting experiments. It not only ensures the hot air input rate, but also reduces the equipment cost. The second pressure reducing valve 35 is used to reduce the pressure of the compressed air to a suitable size, and the second flow meter 36 is used to measure and adjust the input flow of the air.

[0031] In some embodiments, the temperature regulating unit 3 further includes a temperature sensor 37 and a temperature controller 38. The temperature sensor 37 is disposed in the pressure vessel 1 and is used to measure the temperature in the pressure vessel 1. The temperature sensor 37 is connected to the air heater 33 through the temperature controller 38 for signal control. When the temperature in the pressure vessel 1 reaches the requirement, the air heater 33 is controlled to stop heating.

[0032] In some embodiments, the temperature regulating unit 3 further includes a filter 39 , which is disposed on the second pipe 32 to filter particulate matter in the air.

[0033] In some embodiments, the pressure regulating unit 4 includes a third pipe 41, a pressure regulating valve 42 and a pressure sensor 43. One end of the third pipe 41 is connected to the pressure vessel 1, and the other end thereof forms a vent. The pressure regulating valve 42 is arranged on the third pipe 41, and the pressure sensor 43 is arranged in the pressure vessel 1 and is connected to the pressure regulating valve 42 for signal control. The temperature regulating unit 3 increases the pressure while increasing the temperature of the gas in the pressure vessel 1. When the pressure sensor 43 detects that the pressure in the pressure vessel 1 is too high, the pressure regulating valve 42 is controlled to open, and the pressure is released through the third pipe 41 to reduce the air pressure to a suitable level.

[0034] In some embodiments, the oil mist injection unit 5 includes an oil supply module 51, a compressed air supply module 52, an oil mist 53 and a fourth pipe 54. The compressed air supply module 52 is connected to the pressure vessel 1 through the fourth pipe 54. The compressed air supply module 52 can share the air compressor 31 of the temperature regulating unit 3 or the combination of the air compressor 31 and the air cylinder 34, or can separately set up a set of air supply devices similar to the air compressor 31 and the air cylinder 34, as long as a stable supply of air can be achieved. The oil mist 53 is arranged on the fourth pipe 54 and connected to the oil supply module 51. The oil supply module 51 is used to transport lubricating oil to the oil mist 53. After being atomized by the oil mist 53, the oil mist of the lubricating oil is formed, and is mixed with the compressed air in the fourth pipe 54 and transported to the pressure vessel 1. The oil mist 53 can use a venturi tube or other atomizers.

[0035] In some embodiments, the detection unit 6 includes an ammonia leakage pretreatment device and detection system 61 and an exhaust gas pretreatment device and detection system 62. The ammonia leakage pretreatment device and detection system 61 are used to detect ammonia leakage, and the exhaust gas pretreatment device and detection system 62 are used to detect unconventional emissions in the exhaust gas.

[0036] In order to better understand the present invention, the following Figure 1The technical solution of the present invention is described in detail: ammonia (liquid ammonia) is quantitatively injected into the pressure vessel 1 through the gas injection unit 2. High-temperature air is input into the pressure vessel 1 through the temperature adjustment unit 3. The gas in the pressure vessel 1 reaches the required temperature. The air pressure in the pressure vessel 1 is adjusted to the required size through the pressure adjustment unit 4. Lubricating oil mist is input into the pressure vessel 1 through the oil mist injection unit 5. After the above steps, the pressure vessel 1 obtains the gas generated when ammonia leakage occurs under a certain working condition of a simulated marine low-speed engine, and the ammonia content in the gas is known. Then the gas is introduced into the detection unit 6 for detection, and the detection result of the detection unit 6 is compared with the actual content of ammonia, so as to obtain the detection accuracy of the detection unit 6 under this working condition. Then the working condition is changed, that is, the temperature, pressure, lubricating oil content, ammonia content and other data are changed to repeat the test, and the detection accuracy of the detection unit 6 under other working conditions is obtained.

[0037] The operation method of simulating exhaust gas containing unconventional emissions is the same as that of simulating ammonia leakage, except that ammonia (liquid ammonia) is replaced with unconventional emissions and the test data is changed accordingly.

[0038] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines, characterized in that: include: Pressure vessels; a gas injection unit, the gas injection unit being connected to the pressure vessel to inject a target gas into the pressure vessel; a temperature regulating unit, the temperature regulating unit being in communication with the pressure vessel to inject hot air into the pressure vessel; a pressure regulating unit, the pressure regulating unit being in communication with the pressure vessel to regulate the gas pressure in the pressure vessel; an oil mist injection unit, the oil mist injection unit being in communication with the pressure vessel to inject oil mist into the pressure vessel; A detection unit is communicated with the pressure container to detect the target gas in the mixed gas in the pressure container.

2. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 1 is characterized in that: The gas injection unit includes a gas supply module, a first pressure reducing valve, a first flow meter and a first pipeline. The gas supply module is connected to the pressure vessel through the first pipeline. The first pressure reducing valve and the first flow meter are arranged on the first pipeline for measuring and adjusting the flow of the target gas.

3. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 2 is characterized in that: The gas injection unit further includes a fiber grating sensor and / or an electrochemical sensor, and the fiber grating sensor and / or the electrochemical sensor are arranged on the first pipeline to detect whether the target gas is leaking.

4. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 1 is characterized in that: The temperature regulating unit comprises an air compressor, a second pipeline and an air heater. The air compressor is connected to the pressure container through the second pipeline. The air heater is arranged on the second pipeline to heat the air.

5. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 4 is characterized in that: The temperature regulating unit also includes an air cylinder, a second pressure reducing valve and a second flow meter. The air compressor is connected to the air cylinder, and the air cylinder is connected to the pressure container through the second pipeline. The second pressure reducing valve and the second flow meter are arranged on the second pipeline for measuring and adjusting the flow of air.

6. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 4 is characterized in that: The temperature regulating unit further comprises a temperature sensor and a temperature controller. The temperature sensor is arranged in the pressure container. The temperature sensor is connected to the air heater through the temperature controller for signal control.

7. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 4 is characterized in that: The temperature regulating unit further includes a filter, and the filter is arranged on the second pipe to filter particulate matter in the air.

8. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 1 is characterized in that: The pressure regulating unit includes a third pipeline, a pressure regulating valve and a pressure sensor. One end of the third pipeline is connected to the pressure container, and the other end forms an air vent. The pressure regulating valve is arranged on the third pipeline. The pressure sensor is arranged in the pressure container and is connected to the pressure regulating valve signal control.

9. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 1 is characterized in that: The oil mist injection unit includes an oil supply module, a compressed air supply module, an oil mist eliminator and a fourth pipeline. The compressed air supply module is connected to the pressure container through the fourth pipeline. The oil mist eliminator is arranged on the fourth pipeline and connected to the oil supply module. The oil mist eliminator can atomize the oil into oil mist and mix it with the compressed air, and then transport it to the pressure container.

10. The ammonia leakage and exhaust gas detection simulation platform for ammonia fuel marine low-speed engines according to claim 1 is characterized in that: The detection unit comprises an ammonia leakage pretreatment device and a detection system and an exhaust gas pretreatment device and a detection system.

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