Integrated testing device and testing method for low-temperature medium gas supply system

Abstract

The invention discloses an integrated testing device and method for a low-temperature medium gas supply system. Comprising a liquefied medium storage tank, a host regulating valve, a gas supply regulating heat exchanger, a host system, a cryogenic reliquefaction loop, a compressor test loop, a heat exchanger test loop and a medium recovery loop. An outlet of a liquefied medium storage tank is connected with inlets of the cryogenic reliquefaction loop, the compressor test loop and the heat exchanger test loop, an inlet of the liquefied medium storage tank is connected with liquid phase outlets of the cryogenic reliquefaction loop and the medium recovery loop, and a gas phase outlet of the medium recovery loop is connected to the compressor test loop; a first outlet of the heat exchanger test loop is connected to the compressor test loop, and a second outlet and an outlet of the compressor test loop are connected to an inlet of the medium recovery loop and then sequentially connected with the host regulating valve, the air supply regulating heat exchanger and the host system. According to the invention, the functions of supplying gas to a host system, re-liquefying flash steam and recovering media are realized, and equipment performance tests under different low-temperature media are supported.

Description

Technical Field

[0001] The invention belongs to the field of energy and power, and in particular relates to an integrated testing device and a testing method for a low-temperature medium gas supply system. Background Art

[0002] With the intensification of global climate change and the gradual depletion of fossil fuel resources, the development and utilization of clean energy has become the focus of global energy policy. The advancement of clean energy technology, especially the application technology of cryogenic media (such as liquid nitrogen, liquefied natural gas, etc.), plays an important role in reducing greenhouse gas emissions and improving air quality. However, there are many hazards and challenges in the storage and use of cryogenic fuels. Due to the low temperature requirements of cryogenic fuels, ordinary materials may become fragile and easily damaged, resulting in safety risks. In addition, leakage may cause serious cold injuries or explosive accidents, so high standards of technical requirements are put forward for the safe storage, effective transportation and efficient utilization of such fuels.

[0003] While solving the problem of safe storage and efficient utilization of cryogenic fuels, the design and development of a gas supply system suitable for cryogenic media itself also faces many technical challenges. In order to avoid the serious consequences of medium leakage, the system must ensure extremely high sealing and reliability. In addition, the material selection and process design of the system must take into account the stringent requirements of the cryogenic environment to ensure that the performance can be maintained under extreme conditions. However, traditional test devices often cannot fully simulate the actual working conditions of cryogenic media, resulting in test results that cannot fully reflect the problems that may arise in real applications. In this regard, advanced countries in the world have developed integrated test devices that can simulate and test various states of cryogenic media in actual applications, greatly promoting the application and development of cryogenic technology. In contrast, there is still a lack of such systematic and efficient testing facilities in China, which limits the development and application of domestic cryogenic technology. Summary of the invention

[0004] The object of the present invention is to provide an integrated testing device and a testing method for a low-temperature medium gas supply system.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A low-temperature medium gas supply system integrated test device, comprising a liquefied medium storage tank, a main engine regulating valve, a gas supply regulating heat exchanger, a main engine system, a cryogenic reliquefaction loop, a compressor test loop, a heat exchanger test loop and a medium recovery loop; the outlet of the liquefied medium storage tank is connected to the inlet of the cryogenic reliquefaction loop, the inlet of the compressor test loop and the inlet of the heat exchanger test loop, the inlet of the liquefied medium storage tank is respectively connected to the outlet of the cryogenic reliquefaction loop and the liquid phase outlet of the medium recovery loop, and the gas phase outlet of the medium recovery loop is connected to the compressor test loop; the first outlet of the heat exchanger test loop is connected to the compressor test loop, the second outlet of the heat exchanger test loop and the outlet of the compressor test loop are connected to the inlet of the medium recovery loop, and then connected to the inlet of the main engine regulating valve; the outlet of the main engine regulating valve is sequentially connected to the gas supply regulating heat exchanger and the main engine system;

[0007] The cryogenic reliquefaction loop processes the flash gas generated in the liquefied medium storage tank in the reliquefaction integrated test device, stabilizes the pressure in the tank and the equipment on the test loop;

[0008] The compressor test loop provides compressed gas to the host system and equipment on the test loop;

[0009] The heat exchanger test loop heats the gas supply medium entering the host system and tests the equipment on the loop;

[0010] The medium recovery loop reliquefies and recovers the test medium flowing through the compressor test loop and the heat exchanger test loop for equipment testing.

[0011] Furthermore, the cryogenic reliquefaction circuit arranges a liquefied medium delivery pump, a cryogenic reliquefaction device, a cryogenic medium heater and a cryogenic regulating valve along the liquid flow direction, and is connected to an inlet of a liquefied medium storage tank after the cryogenic regulating valve; the cryogenic reliquefaction circuit tests the performance of the cryogenic reliquefaction device and the cryogenic medium heater.

[0012] Furthermore, the compressor test circuit arranges a compressed medium delivery pump, a low-temperature medium heater, a low-temperature gas medium storage tank and a compressor along the flow direction of gas and liquid fluids; the compressor test circuit tests the performance of the low-temperature medium heater and the compressor equipment.

[0013] Furthermore, the heat exchanger test loop is arranged with a heat exchange medium delivery pump, a forced vaporizer and a first gas-liquid separator along the flow direction of gas and liquid fluids; two branches are arranged after the first gas-liquid separator, one branch is arranged with a liquid phase regulating valve and an air temperature heater, the outlet of the air temperature heater serves as the first outlet of the heat exchanger test loop, and the other branch is arranged with a low-load heater, the outlet of the low-load heater serves as the second outlet of the heat exchanger test loop; the air temperature heater is connected to the low-temperature gas medium storage tank of the compressor test loop; the heat exchanger test loop tests the performance of the forced vaporizer equipment.

[0014] Furthermore, the medium recovery loop is provided with a medium recovery regulating valve, a recovery and reliquefaction device and a second gas-liquid separator along the flow direction of gas and liquid fluids; two branches are arranged after the second gas-liquid separator, one branch is provided with a reliquefied liquid phase regulating valve, and the outlet of the reliquefied liquid phase regulating valve serves as the liquid phase outlet of the medium recovery loop, and the other branch is provided with a reliquefied gas phase regulating valve, and the outlet of the reliquefied gas phase regulating valve serves as the gas phase outlet of the medium recovery loop; the inlet of the liquefied medium storage tank is connected after the reliquefied liquid phase regulating valve, and the low-temperature medium heater on the compressor test loop is connected after the reliquefied gas phase regulating valve.

[0015] A testing method for a cryogenic medium gas supply system integrated testing device, the method using the cryogenic medium gas supply system integrated testing device is specifically as follows:

[0016] The integrated test device includes five working states: cryogenic reliquefaction, compressed air supply, compressor test, constant temperature air supply, and heat exchanger test. The working state of the integrated test device is controlled by controlling the opening and closing of the delivery pump and the regulating valve, as follows:

[0017] When the integrated test device is in the "cryogenic reliquefaction" working state, the liquefied medium delivery pump and the cryogenic regulating valve are turned on, and medium flows in the cryogenic reliquefaction circuit. In this state, the integrated test device is used to liquefy the flash gas generated in the liquefied medium storage tank or to perform equipment tests on the cryogenic reliquefaction device and the cryogenic medium heater;

[0018] When the integrated test device is in the "compressed air supply" working state, the compressed medium delivery pump and the host regulating valve are turned on, and the medium flows in the compressor test loop and flows to the host system. In this state, the integrated test device compresses the air supply medium entering the host system to 0.1-1 bar;

[0019] When the integrated test device is in the "compressor test" working state, the compressed medium delivery pump and the medium recovery regulating valve are turned on, and medium flows in the compressor test circuit and the medium recovery circuit. In this state, the integrated test device is used to perform equipment tests on the low-temperature medium heater and the compressor;

[0020] When the integrated test device is in the "constant temperature air supply" working state, the heat exchange medium delivery pump and the host regulating valve are turned on, and the medium flows in the heat exchanger test loop and flows to the host system. In this state, the integrated test device heats the air supply medium entering the host system to 10-50 degrees Celsius;

[0021] When the integrated test device is in the "heat exchanger test" working state, the heat exchange medium delivery pump and the medium recovery regulating valve are opened, and medium flows in the heat exchanger test loop and the medium recovery loop. In this state, the integrated test device is used to perform equipment testing on the forced gasifier.

[0022] Furthermore, to prevent the medium in the working circuit from entering the non-working circuit, the cryogenic regulating valve and the reliquefaction liquid phase regulating valve cannot be opened at the same time; the main engine regulating valve and the medium recovery regulating valve cannot be opened at the same time.

[0023] Furthermore, the test working fluid used by the integrated test device for equipment testing is a low-temperature gas fuel including but not limited to nitrogen, hydrogen, and natural gas.

[0024] The beneficial effects of the present invention are:

[0025] 1. This patent is applicable to different cryogenic media, including but not limited to nitrogen, hydrogen, natural gas and other cryogenic gas fuels;

[0026] 2. The present invention is provided with multiple test loops, and the working state of the integrated test device is controlled by the opening and closing of the pump group and the valve system. It also has the functions of storing medium, supplying gas to the host system, flash gas of the reliquefied medium storage system, recovering the test medium and testing the equipment, which effectively improves the overall function of the cryogenic medium gas supply system, and enables the system to show higher adaptability and efficiency when dealing with the actual working environment;

[0027] 3. The present invention utilizes a cryogenic reliquefaction method to process the flash gas generated in the liquefied medium storage tank, which effectively avoids the occurrence of excessive pressure in the tank;

[0028] 4. The present invention is provided with multiple test loops, which can perform equipment performance tests on various equipment in the gas supply system, including cryogenic reliquefaction devices, cryogenic medium heaters, low-temperature medium heaters, compressors and forced gasifiers. Through in-depth research on these equipment, it is helpful to identify and solve potential problems at an early stage, ensure that the manufacturing quality of these equipment meets strict standards, thereby reducing the failure rate and enhancing the overall reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an integrated test device for a cryogenic medium gas supply system;

[0030] Figure 2 This is a schematic diagram of the structure of the cryogenic reliquefaction circuit described in the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the compressor test circuit described in the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the heat exchanger test circuit described in the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the medium recovery loop described in the present invention.

[0034] In the figure: 1. Liquefied medium storage tank; 2. Low-temperature gas medium storage tank; 3. Compressed medium delivery pump; 4. Heat exchange medium delivery pump; 5. Liquefied medium delivery pump; 6. Cryogenic reliquefaction device; 7. Recovery reliquefaction device; 8. Cryogenic medium heater; 9. Low-temperature medium heater; 10. Gas supply regulating heat exchanger; 11. Forced gasifier; 12. Air temperature heater; 13. Low-load heater; 14. First gas-liquid separator; 15. Second gas-liquid separator; 16. Cryogenic regulating valve; 17. Liquid phase regulating valve; 18. Medium recovery regulating valve; 19. Reliquefaction liquid phase regulating valve; 20. Reliquefaction gas phase regulating valve; 21. Main engine regulating valve; 22. Compressor. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings.

[0036] The present invention proposes an integrated test device and test method for a low-temperature medium gas supply system, which aims to comprehensively test and verify the key equipment designed in the gas supply system, obtain the operating conditions of the test equipment in the actual gas supply system, identify and solve potential problems as early as possible, so as to ensure its safety, reliability and economy in actual operation, reduce operating costs and extend the service life of the equipment.

[0037] Combination Figure 1 The present invention provides an integrated test device for a cryogenic medium gas supply system, comprising a medium storage system, a pump group, a reliquefaction system, a compressor 22, a heat exchange system, a separation system, a host system and a valve system. The related devices in the above systems are connected in sequence through pipelines to form an integrated test device, and are divided into 4 loops: a deep cold reliquefaction loop a, a compressor test loop b, a heat exchanger test loop c and a medium recovery loop d. Through the control of the pump group and the valve system, it has the functions of storing medium, supplying gas to the host system, flash gas of the reliquefied medium storage system, recovering test medium and testing equipment.

[0038] The medium storage system includes a liquefied medium storage tank 1 and a low-temperature gas medium storage tank 2; the pump group includes a compressed medium delivery pump 3, a heat exchange medium delivery pump 4 and a liquefied medium delivery pump 5; the reliquefaction system includes a cryogenic reliquefaction device 6 and a recovery reliquefaction device 7; the heat exchange system includes a cryogenic medium heater 8, a low-temperature medium heater 9, an air supply regulating heat exchanger 10, a forced gasifier 11, an air temperature heater 12 and a low-load heater 13; the separation system includes a first gas-liquid separator 14 and a second gas-liquid separator 15; the valve system includes a cryogenic regulating valve 16, a liquid phase regulating valve 17, a medium recovery regulating valve 18, a reliquefaction liquid phase regulating valve 19, a reliquefaction gas phase regulating valve 20, and a main engine regulating valve 21.

[0039] The cryogenic reliquefaction circuit a is provided with a liquefied medium delivery pump 5, a cryogenic reliquefaction device 6, a cryogenic medium heater 8 and a cryogenic regulating valve 16 along the liquid flow direction, and the inlet of the liquefied medium storage tank 1 is connected after the cryogenic regulating valve 16; the cryogenic reliquefaction circuit tests the equipment performance of the cryogenic reliquefaction device 6 and the cryogenic medium heater 8.

[0040] The compressor test circuit b arranges the compressed medium delivery pump 3, the low-temperature medium heater 9, the low-temperature gas medium storage tank 2 and the compressor 22 along the flow direction of the gas and liquid fluids; the compressor test circuit tests the performance of the low-temperature medium heater 9 and the compressor 22 equipment.

[0041] The heat exchanger test loop c is arranged with a heat exchange medium delivery pump 4, a forced vaporizer 14 and a first gas-liquid separator 13 along the flow direction of gas and liquid fluids; two branches are arranged after the first gas-liquid separator 13, one branch is arranged with a liquid phase regulating valve 17 and an air temperature heater 12, and the outlet of the air temperature heater 12 serves as the first outlet of the heat exchanger test loop, and the other branch is arranged with a low-load heater 13, and the outlet of the low-load heater 13 serves as the second outlet of the heat exchanger test loop; the air temperature heater 12 is connected to the low-temperature gas medium storage tank 2 of the compressor test loop; the heat exchanger test loop tests the equipment performance of the forced vaporizer 14.

[0042] The medium recovery loop d is provided with a medium recovery regulating valve 18, a recovery and reliquefaction device 7 and a second gas-liquid separator 15 along the flow direction of gas and liquid fluids; two branches are arranged after the second gas-liquid separator 15, one branch is provided with a reliquefied liquid phase regulating valve 19, and the outlet of the reliquefied liquid phase regulating valve 19 serves as the liquid phase outlet of the medium recovery loop; the other branch is provided with a reliquefied gas phase regulating valve 20, and the outlet of the reliquefied gas phase regulating valve 20 serves as the gas phase outlet of the medium recovery loop; the inlet of the liquefied medium storage tank 1 is connected after the reliquefied liquid phase regulating valve 19, and the low-temperature medium heater 9 on the compressor test loop is connected after the reliquefied gas phase regulating valve 20.

[0043] The outlet of the liquefied medium storage tank 1 is connected to the inlet of the cryogenic reliquefaction loop a, the inlet of the compressor test loop b, and the inlet of the heat exchanger test loop c; the outlet of the cryogenic reliquefaction loop a is connected to the inlet of the liquefied medium storage tank 1, the first outlet of the heat exchanger test loop c is connected to the low-temperature gas medium storage tank 2, the second outlet of the heat exchanger test loop c and the outlet of the compressor test loop b are connected to the inlet of the medium recovery loop d and the inlet of the main engine regulating valve 21, the gas phase outlet of the medium recovery loop d is connected to the low-temperature medium heater 9, and the liquid phase outlet of the medium recovery loop d is connected to the inlet of the liquefied medium storage tank 1; the outlet of the main engine regulating valve 21 is connected to the inlet of the gas supply regulating heat exchanger 10, and the outlet of the gas supply regulating heat exchanger 10 is connected to the main engine system.

[0044] Specifically, the specific working process of each circuit of the present invention is as follows:

[0045] Combination Figure 2 , the cryogenic reliquefaction loop a is sequentially arranged with a liquefied medium delivery pump 5, a cryogenic reliquefaction device 6, a cryogenic medium heater 8, and a cryogenic regulating valve 16 along the medium flow direction. These components work together to process the flash gas in the liquefied medium storage tank 1 and keep the pressure in the tank within the normal range. At the same time, the cryogenic reliquefaction device 6 and the cryogenic medium heater 8 can be tested. Specifically, when the cryogenic reliquefaction loop a enters the working state, the flash gas generated by the liquefied medium storage tank 1 is transported into the cryogenic reliquefaction device 6 for treatment by the liquefied medium delivery pump 5, and the medium temperature is reduced to a cryogenic state that is 5-6°C lower than the liquefaction temperature in the liquefied medium storage tank 1, ensuring that the flash gas is completely liquefied and avoiding the problem of incomplete liquefaction. Then, it enters the cryogenic medium heater 8 to be heated to the liquefaction temperature in the liquefied medium storage tank 1, and finally flows back to the liquefied medium storage tank 1 through the cryogenic regulating valve for storage.

[0046] Combination Figure 3 The compressor test loop b is used to provide compressed gas for the host system or to perform equipment tests on the compressor 22 and the low-temperature medium heater 9. Specifically, when the compressor test loop b enters the working state, the liquid medium in the liquefied medium storage tank 1 is first transported by the compressed medium delivery pump 3, and then heated to the tank temperature of the low-temperature gas medium storage tank 2 by the low-temperature medium heater 9, and then stored in the low-temperature gas medium storage tank 2. After the storage volume reaches a certain level, the medium enters the compressor 22 to compress the low-temperature medium, compressing the medium to a certain high-temperature and high-pressure state, and then selectively enters the host system or is recycled into the medium recovery loop d.

[0047] Combination Figure 4 , the heat exchanger test loop c is used to provide constant temperature gas to the host system and perform performance tests on the forced vaporizer 11. The liquid medium in the liquefied medium storage tank 1 is transported to the forced vaporizer 11 by the heat exchange medium delivery pump 4 for vaporization and heat exchange. The vaporized low-temperature medium is separated by the first gas-liquid separator 14, and the separated liquid phase enters the air temperature heater 12 through the liquid phase regulating valve 17, and is heated to the tank temperature of the low-temperature gas medium storage tank 2 and then stored, while the gas phase enters the low-load heater 13 for heating, and then selectively enters the host system or is recovered into the medium recovery loop d.

[0048] Combination Figure 5The function of the medium recovery loop d is to recover the medium in the test device during the "compressor test" or "heat exchanger test", re-cool and liquefy the medium after the test in the compressor test loop b and the heat exchanger test loop c, and store it back in the liquefied medium storage tank 1 and the low-temperature gas medium storage tank 2. The specific workflow is that in the medium recovery loop d, the recovery and reliquefaction device 7 reduces the temperature of the treated medium to the liquefaction temperature under the tank pressure, and passes through the second gas-liquid separator 15 for gas-liquid separation. The liquid part enters the liquefied medium storage tank 1 through the reliquefaction liquid phase regulating valve 19 for storage, and the gas part enters the low-temperature medium heater 9 through the reliquefaction gas phase regulating valve 20 for heat exchange, and is heated to the tank temperature of the low-temperature gas medium storage tank 2 in the low-temperature medium heater 9, and enters the low-temperature gas medium storage tank 2 for storage.

[0049] The present invention provides a testing method for an integrated testing device for a cryogenic medium gas supply system, which is specifically as follows:

[0050] The test device of the patent of the present invention controls the working state of the integrated test device by controlling the operation of the pump group and the opening and closing of the valve system, so that the integrated test device has five working states: deep cold reliquefaction, compressed air supply, compressor test, constant temperature air supply, and heat exchanger test, as well as five major functions: storage medium, host system air supply, reliquefaction medium storage system flash gas, test medium recovery and equipment testing.

[0051] When the integrated test device enters the "cryogenic reliquefaction" working state, the liquefied medium delivery pump 5 and the cryogenic regulating valve 16 are opened, the reliquefaction liquid phase regulating valve 19 is closed, and only the cryogenic reliquefaction loop a of the integrated test device has medium flow. Specifically, after the flash gas generated by the liquefied medium storage tank 1 is transported to the cryogenic reliquefaction device 6 for treatment by the liquefied medium delivery pump 5, the medium temperature is reduced to a cryogenic state that is 5-6°C lower than the liquefaction temperature in the liquefied medium storage tank 1, ensuring that the flash gas is completely liquefied and avoiding the problem of incomplete liquefaction. It then enters the cryogenic medium heater 8 to be heated to the liquefaction temperature in the liquefied medium storage tank 1, and finally flows back to the liquefied medium storage tank 1 for storage. In this state, the function of the integrated test device is to liquefy the flash gas generated in the liquefied medium storage tank 1 or to test the performance of the cryogenic reliquefaction device 6 and the cryogenic medium heater 8.

[0052] When the integrated test device enters the "compressed gas supply" working state, the compressed medium delivery pump 3 and the gas supply regulating valve are opened, and the medium recovery regulating valve 18 is closed. In the integrated test device, only the compressor test loop b has medium flow, and it flows to the host system. Specifically, the liquid medium in the liquefied medium storage tank 1 is first transported by the compressed medium delivery pump 3, and after being heated to the tank temperature of the low-temperature gas medium storage tank 2 by the low-temperature medium heater 9, it is stored in the low-temperature gas medium storage tank 2. After the storage volume reaches a certain level, the medium enters the compressor 22 to compress the low-temperature medium, compressing the medium to a certain high temperature and high pressure state, and then enters the gas supply regulating heat exchanger 10 through the host regulating valve 21. The high temperature and high pressure medium is cooled or heated to the temperature required by the host system, and finally enters the host system. In this state, the integrated test device is used to compress the gas supply to the host system;

[0053] When the integrated test device enters the "compressor test" working state, the compressed medium delivery pump 3 and the medium recovery regulating valve 18 are opened, the air supply regulating valve is closed, and only the compressor test circuit b and the medium recovery circuit d in the integrated test device have medium flow. Specifically, the liquid medium in the liquefied medium storage tank 1 is first delivered by the compressed medium delivery pump 3, enters the low-temperature medium heater 9 for equipment testing, and the liquefied medium is heated to the tank temperature of the low-temperature gas medium storage tank 2 and stored in the low-temperature gas medium storage tank 2. After the storage volume reaches a certain amount, the medium enters the compressor 22 for the compressor 22 performance test, compresses the medium to a certain high temperature and high pressure state, and then enters the medium recovery circuit d, enters the recovery and reliquefaction device 7 through the medium recovery regulating valve 18, cools to the liquefaction temperature under the pressure of the liquefied medium storage tank 1, passes through the second gas-liquid separator 15 for gas-liquid separation, the liquid part enters the liquefied medium storage tank 1, and the gas part is heated to the temperature of the low-temperature gas medium storage tank 2 by the low-temperature medium heater 9, and enters the low-temperature gas medium storage tank 2. In this state, the integrated test device is used to perform equipment testing on the low-temperature medium heater 9 and the compressor 22;

[0054] When the integrated test device enters the "constant temperature gas supply" working state, the heat exchange medium delivery pump 4 and the gas supply regulating valve are opened, and the medium recovery regulating valve 18 is closed. Only the medium flows in the heat exchanger test loop c of the integrated test device, and flows to the host system. Specifically, the liquid medium in the liquefied medium storage tank 1 is transported to the forced vaporizer 11 by the heat exchange medium delivery pump 4 for gasification and heat exchange, and the vaporized low-temperature medium is separated by the first gas-liquid separator 14. The separated liquid phase part enters the air temperature heater 12 through the liquid phase regulating valve 17, and is stored after being heated to the tank temperature of the low-temperature gas medium storage tank 2, while the gas phase part enters the low-load heater 13 for heating, and then enters the gas supply regulating heat exchanger 10 through the host regulating valve 21. The medium is cooled or heated to the temperature required by the host system, and finally enters the host system. In this state, the integrated test device is used to supply gas to the host system at a constant temperature;

[0055] When the integrated test device enters the "heat exchanger test" working state, the heat exchange medium delivery pump 4 and the medium recovery regulating valve 18 are opened, the gas supply regulating valve is closed, and only the heat exchanger test loop c and the medium recovery loop d in the integrated test device have medium flow. Specifically, the liquid medium in the liquefied medium storage tank 1 is delivered to the forced vaporizer 11 by the heat exchange medium delivery pump 4 for gasification and heat exchange, and the vaporized low-temperature medium is separated by the first gas-liquid separator 14, and the separated liquid phase part enters the air temperature heater 12 through the liquid phase regulating valve 17, and is heated to the tank temperature of the low-temperature gas medium storage tank 2 and then stored, while the gas phase part enters the low-load heater 13 for heating, and then enters the medium recovery loop d, enters the recovery and reliquefaction device 7 through the medium recovery regulating valve 18, and is cooled to the liquefaction temperature under the pressure of the liquefied medium storage tank 1, and is separated by the second gas-liquid separator 15. The liquid part enters the liquefied medium storage tank 1, and the gas part is heated to the temperature of the low-temperature gas medium storage tank 2 by the low-temperature medium heater 9, and enters the low-temperature gas medium storage tank 2. In this state, the integrated testing device is used to perform equipment performance testing on the forced gasifier 11 .

[0056] The present invention provides an integrated testing device and testing method for a low-temperature medium gas supply system, which can not only store and supply gas fuels in different states for the host system and reliquefy the flash gas generated in the medium storage system, but also can perform equipment testing on cryogenic reliquefaction devices, cryogenic medium heaters, low-temperature medium heaters, compressors and forced gasifiers for different low-temperature gas fuels, simulate the equipment operation conditions under different states, ensure that sufficient safety tests can be completed before the equipment is put into production, and recycle the test medium.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cryogenic medium gas supply system integrated test device, characterized in that: The invention comprises a liquefied medium storage tank (1), a main engine regulating valve (21), an air supply regulating heat exchanger (10), a main engine system, a cryogenic reliquefaction circuit, a compressor test circuit, a heat exchanger test circuit and a medium recovery circuit; the outlet of the liquefied medium storage tank (1) is connected to the inlet of the cryogenic reliquefaction circuit, the inlet of the compressor test circuit and the inlet of the heat exchanger test circuit, the inlet of the liquefied medium storage tank (1) is respectively connected to the outlet of the cryogenic reliquefaction circuit and the liquid phase outlet of the medium recovery circuit, and the gas phase outlet of the medium recovery circuit is connected to the compressor test circuit; the first outlet of the heat exchanger test circuit is connected to the compressor test circuit, the second outlet of the heat exchanger test circuit and the outlet of the compressor test circuit are connected to the inlet of the medium recovery circuit, and then connected to the inlet of the main engine regulating valve (21); the outlet of the main engine regulating valve (21) is connected to the air supply regulating heat exchanger (10) and the main engine system in sequence; The cryogenic reliquefaction loop processes the flash gas generated in the liquefied medium storage tank in the reliquefaction integrated test device, stabilizes the pressure in the tank and the equipment on the test loop; The compressor test loop provides compressed gas to the host system and equipment on the test loop; The heat exchanger test loop heats the gas supply medium entering the host system and tests the equipment on the loop; The medium recovery loop reliquefies and recovers the test medium flowing through the compressor test loop and the heat exchanger test loop for equipment testing.

2. The low-temperature medium gas supply system integrated test device according to claim 1, characterized in that: The cryogenic reliquefaction circuit is provided with a liquefied medium delivery pump (5), a cryogenic reliquefaction device (6), a cryogenic medium heater (8) and a cryogenic regulating valve (16) along the liquid flow direction, and is connected to the inlet of the liquefied medium storage tank (1) after the cryogenic regulating valve (16); the cryogenic reliquefaction circuit tests the equipment performance of the cryogenic reliquefaction device (6) and the cryogenic medium heater (8).

3. The low-temperature medium gas supply system integrated test device according to claim 1, characterized in that: The compressor test circuit arranges a compressed medium delivery pump (3), a low-temperature medium heater (9), a low-temperature gas medium storage tank (2) and a compressor (22) along the flow direction of gas and liquid fluids; the compressor test circuit tests the performance of the low-temperature medium heater (9) and the compressor (22).

4. The low-temperature medium gas supply system integrated test device according to claim 1, characterized in that: The heat exchanger test loop is provided with a heat exchange medium delivery pump (4), a forced vaporizer (14) and a first gas-liquid separator (13) along the flow direction of gas and liquid fluids; two branches are arranged after the first gas-liquid separator (13), one branch is provided with a liquid phase regulating valve (17) and an air temperature heater (12), the outlet of the air temperature heater (12) serves as the first outlet of the heat exchanger test loop, and the other branch is provided with a low-load heater (13), the outlet of the low-load heater (13) serves as the second outlet of the heat exchanger test loop; the air temperature heater (12) is connected to a low-temperature gas medium storage tank (2) of a compressor test loop; and the heat exchanger test loop tests the performance of the forced vaporizer (14) equipment.

5. The low-temperature medium gas supply system integrated test device according to claim 1, characterized in that: The medium recovery loop is provided with a medium recovery regulating valve (18), a recovery and reliquefaction device (7) and a second gas-liquid separator (15) along the flow direction of gas and liquid fluids; two branches are arranged behind the second gas-liquid separator (15); one branch is provided with a reliquefied liquid phase regulating valve (19), the outlet of the reliquefied liquid phase regulating valve (19) serves as the liquid phase outlet of the medium recovery loop; the other branch is provided with a reliquefied gas phase regulating valve (20), the outlet of the reliquefied gas phase regulating valve (20) serves as the gas phase outlet of the medium recovery loop; the inlet of the liquefied medium storage tank (1) is connected behind the reliquefied liquid phase regulating valve (19), and the low-temperature medium heater (9) on the compressor test loop is connected behind the reliquefied gas phase regulating valve (20).

6. A method for integrated testing of a cryogenic medium gas supply system, characterized in that: Using the cryogenic medium gas supply system integrated testing device according to any one of claims 1 to 5, the method specifically comprises: The integrated test device includes five working states: cryogenic reliquefaction, compressed air supply, compressor test, constant temperature air supply, and heat exchanger test. The working state of the integrated test device is controlled by controlling the opening and closing of the delivery pump and the regulating valve, as follows: When the integrated test device is in the "cryogenic reliquefaction" working state, the liquefied medium delivery pump (5) and the cryogenic regulating valve (16) are turned on, and medium flows in the cryogenic reliquefaction circuit. In this state, the integrated test device is used to liquefy flash gas generated in the liquefied medium storage tank or to perform equipment testing on the cryogenic reliquefaction device (6) and the cryogenic medium heater (8); When the integrated test device is in the "compressed air supply" working state, the compressed medium delivery pump (3) and the host regulating valve (21) are turned on, and medium flows in the compressor test loop and flows to the host system. In this state, the integrated test device compresses the air supply medium entering the host system to 0.1-1 bar; When the integrated test device is in the "compressor test" working state, the compressed medium delivery pump (3) and the medium recovery regulating valve (18) are turned on, and medium flows in the compressor test circuit and the medium recovery circuit. In this state, the integrated test device is used to perform equipment testing on the low-temperature medium heater (9) and the compressor (22); When the integrated test device is in the "constant temperature air supply" working state, the heat exchange medium delivery pump (4) and the host regulating valve (21) are turned on, and medium flows in the heat exchanger test loop and flows to the host system. In this state, the integrated test device heats the air supply medium entering the host system to 10-50 degrees Celsius; When the integrated test device is in the "heat exchanger test" working state, the heat exchange medium delivery pump (4) and the medium recovery regulating valve (18) are turned on, and medium flows in the heat exchanger test circuit and the medium recovery circuit. In this state, the integrated test device is used to perform equipment testing on the forced gasifier (11).

7. The testing method of the cryogenic medium gas supply system integrated testing device according to claim 6, characterized in that: To prevent the medium in the working circuit from entering the non-working circuit, the cryogenic regulating valve (16) and the reliquefaction liquid phase regulating valve (19) cannot be opened at the same time; and the main engine regulating valve (21) and the medium recovery regulating valve (18) cannot be opened at the same time.

8. The testing method of the cryogenic medium gas supply system integrated testing device according to claim 6, characterized in that: The test working fluid used by the integrated test device for equipment testing is a low-temperature gas fuel including but not limited to nitrogen, hydrogen, and natural gas.

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