A low-temperature medium gas supply system integrated test device and test method

Abstract

The application discloses a low-temperature medium gas supply system integrated test device and a test method. The device comprises a liquefied medium storage tank, a host regulating valve, a gas supply regulating heat exchanger, a host system, a deep cooling re-liquefaction circuit, a compressor test circuit, a heat exchanger test circuit and a medium recovery circuit. The outlet of the liquefied medium storage tank is connected with the deep cooling re-liquefaction circuit, the compressor test circuit and the heat exchanger test circuit, the inlet of the liquefied medium storage tank is connected with the deep cooling re-liquefaction circuit and the medium recovery circuit, the gas phase outlet of the medium recovery circuit is connected with the compressor test circuit, the first outlet of the heat exchanger test circuit is connected with the compressor test circuit, the second outlet and the outlet of the compressor test circuit are connected with the inlet of the medium recovery circuit, and the medium recovery circuit is sequentially connected with the host regulating valve, the gas supply regulating heat exchanger and the host system. The device realizes the functions of gas supply for the host system, flash gas re-liquefaction and medium recovery, and supports equipment performance test under different low-temperature media.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of energy power, and particularly relates to a low-temperature medium gas supply system integrated test device and a test method. BACKGROUND

[0002] With the intensification of global climate change and the gradual depletion of fossil fuel resources, the development and utilization of clean energy have become the focus of global energy policy. The progress of clean energy technology, especially the application technology of low-temperature medium (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 low-temperature fuels. Due to the low temperature requirement of low-temperature fuels, ordinary materials may become fragile and easily damaged, resulting in safety risks. In addition, leakage may cause serious cold damage or explosive accidents, so the safe storage, efficient transportation and efficient utilization of such fuels have put forward high-standard technical requirements.

[0003] In solving the problems of safe storage and efficient utilization of low-temperature fuels, the design and development of gas supply systems suitable for low-temperature medium also face many technical difficulties. In order to avoid the serious consequences caused by medium leakage, the system must ensure extremely high sealing and reliability. In addition, the material selection and process design of the system must specially consider the harsh requirements of low-temperature environment to ensure stable performance under extreme conditions. However, traditional test devices often cannot fully simulate the actual working conditions of low-temperature medium, resulting in test results that cannot fully reflect the problems that may occur in real applications. In this regard, advanced countries in the world have developed integrated test devices, which can simulate and test various states of low-temperature medium in actual applications, greatly promoting the application and development of low-temperature technology. In contrast, there is still a lack of such systematic and efficient test facilities in China, which limits the development and application of low-temperature technology in China. SUMMARY

[0004] The purpose of the present application is to provide a low-temperature medium gas supply system integrated test device and a test method.

[0005] The purpose of the present application is achieved by the following technical solutions:

[0006] The application discloses a low-temperature medium gas supply system integrated test device, which comprises a liquefied medium storage tank, a main engine regulating valve, a gas supply regulating heat exchanger, a main engine system, a deep cooling re-liquefaction circuit, a compressor test circuit, a heat exchanger test circuit and a medium recovery circuit; the outlet of the liquefied medium storage tank is connected with the inlet of the deep cooling re-liquefaction 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 is connected with the outlet of the deep cooling re-liquefaction circuit and the liquid phase outlet of the medium recovery circuit respectively; the gas phase outlet of the medium recovery circuit is connected with the compressor test circuit; the first outlet of the heat exchanger test circuit is connected with the compressor test circuit; the second outlet of the heat exchanger test circuit and the outlet of the compressor test circuit are connected with the inlet of the medium recovery circuit and then connected with the inlet of the main engine regulating valve; the outlet of the main engine regulating valve is connected with the gas supply regulating heat exchanger and the main engine system in sequence.

[0007] The deep cooling re-liquefaction circuit processes the flash gas generated in the liquefied medium storage tank of the re-liquefaction integrated test device, and stabilizes the pressure in the tank and the equipment on the test circuit.

[0008] The compressor test circuit provides compressed gas for the main engine system and tests the equipment on the test circuit.

[0009] The heat exchanger test circuit heats the gas supply medium entering the main engine system and tests the equipment on the test circuit.

[0010] The medium recovery circuit re-liquefies and recovers the test medium flowing through the compressor test circuit and the heat exchanger test circuit.

[0011] Further, the deep cooling re-liquefaction circuit is provided with a liquefied medium delivery pump, a deep cooling re-liquefaction device, a deep cooling medium heater and a deep cooling regulating valve along the liquid flow direction, and the inlet of the liquefied medium storage tank is connected after the deep cooling regulating valve; the deep cooling re-liquefaction circuit tests the equipment performance of the deep cooling re-liquefaction device and the deep cooling medium heater.

[0012] Further, the compressor test circuit is provided with a compressed medium delivery pump, a low-temperature medium heater, a low-temperature gas medium storage tank and a compressor along the gas and liquid flow directions; the compressor test circuit tests the equipment performance of the low-temperature medium heater and the compressor.

[0013] Further, the heat exchanger test circuit is provided with a heat exchange medium delivery pump, a forced gasifier and a first gas-liquid separator along the gas and liquid flow directions; a branch is arranged after the first gas-liquid separator, one branch is provided with a liquid phase regulating valve and an air temperature heater, the outlet of the air temperature heater is used as the first outlet of the heat exchanger test circuit, and the other branch is provided with a low-load heater, the outlet of the low-load heater is used as the second outlet of the heat exchanger test circuit; the air temperature heater is connected with the low-temperature gas medium storage tank of the compressor test circuit; the heat exchanger test circuit tests the equipment performance of the forced gasifier.

[0014] Further, the medium recovery circuit is arranged along the gas and liquid fluid flow direction with a medium recovery regulating valve, a recovery re-liquefaction device and a second gas-liquid separator; two branches are arranged after the second gas-liquid separator, one branch is arranged with a re-liquefaction liquid phase regulating valve, the outlet of the re-liquefaction liquid phase regulating valve is used as the liquid phase outlet of the medium recovery circuit, and the other branch is arranged with a re-liquefaction gas phase regulating valve, the outlet of the re-liquefaction gas phase regulating valve is used as the gas phase outlet of the medium recovery circuit; a liquefied medium storage tank inlet is connected after the re-liquefaction liquid phase regulating valve, and a low-temperature medium heater on the compressor test circuit is connected after the re-liquefaction gas phase regulating valve.

[0015] A test method of a low-temperature medium gas supply system integrated test device, which is specifically as follows:

[0016] The integrated test device includes five working states of deep cooling re-liquefaction, compressed gas supply, compressor test, constant temperature gas supply and heat exchanger test, and the working states of the integrated test device are controlled by controlling the opening and closing of the delivery pumps and the regulating valves, which are specifically as follows:

[0017] In the deep cooling re-liquefaction working state of the integrated test device, the liquefied medium delivery pump and the deep cooling regulating valve are opened, the deep cooling re-liquefaction circuit has medium flow, and in this state, the integrated test device is used for testing the flash gas generated in the liquefied medium storage tank or testing the deep cooling re-liquefaction device and the deep cooling medium heater;

[0018] In the compressed gas supply working state of the integrated test device, the compressed medium delivery pump and the main engine regulating valve are opened, the compressed medium test circuit has medium flow and flows to the main engine system, and in this state, the integrated test device compresses the gas supply medium entering the main engine system to 0.1-1 bar;

[0019] In the compressor test working state of the integrated test device, the compressed medium delivery pump and the medium recovery regulating valve are opened, the compressed medium test circuit and the medium recovery circuit have medium flow, and in this state, the integrated test device is used for testing the low-temperature medium heater and the compressor;

[0020] In the constant temperature gas supply working state of the integrated test device, the heat exchange medium delivery pump and the main engine regulating valve are opened, the heat exchanger test circuit has medium flow and flows to the main engine system, and in this state, the integrated test device heats the gas supply medium entering the main engine system to 10-50 degrees Celsius;

[0021] In the heat exchanger test working state of the integrated test device, the heat exchange medium delivery pump and the medium recovery regulating valve are opened, the heat exchanger test circuit and the medium recovery circuit have medium flow, and in this state, the integrated test device is used for testing 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 simultaneously; the main unit regulating valve and the medium recovery regulating valve cannot be opened simultaneously.

[0023] Furthermore, the working medium used by the integrated testing device for equipment testing is a cryogenic gaseous fuel, including but not limited to nitrogen, hydrogen, and natural gas.

[0024] The beneficial effects of this invention are as follows:

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

[0026] 2. This invention is equipped with multiple test loops, and the working status of the integrated test device is controlled by the opening and closing of the pump group and valve system. It also has the functions of storing medium, supplying gas to the main system, flashing vapor of the reliquefied medium storage system, recovering test medium, and testing equipment. It effectively improves the overall function of the cryogenic medium supply system, so that the system can show higher adaptability and efficiency when dealing with actual working environments.

[0027] 3. This invention utilizes cryogenic reliquefaction to treat flash vapor generated in liquefied medium storage tanks, effectively preventing excessive pressure inside the tank;

[0028] 4. This invention sets up multiple test loops, which can perform equipment performance tests on various devices in the gas supply system, including cryogenic reliquefaction devices, cryogenic medium heaters, low-temperature medium heaters, compressors, and forced vaporizers. In-depth research on these devices helps to identify and solve potential problems early, ensure that the manufacturing quality of these devices meets strict standards, thereby reducing the failure rate and enhancing the overall reliability of the system. Attached Figure Description

[0029] Figure 1 A schematic diagram of an integrated testing device for a cryogenic medium supply system;

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

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

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

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

[0034] Fig. 1: liquefied medium storage tank; 2: cryogenic gas medium storage tank; 3: compressed medium delivery pump; 4: heat exchange medium delivery pump; 5: liquefied medium delivery pump; 6: cryogenic re-liquefaction device; 7: recovery re-liquefaction device; 8: cryogenic medium heater; 9: cryogenic medium heater; 10: gas supply adjustment heat exchanger; 11: forced vaporizer; 12: air temperature heater; 13: low load heater; 14: first gas-liquid separator; 15: second gas-liquid separator; 16: cryogenic adjustment valve; 17: liquid phase adjustment valve; 18: medium recovery adjustment valve; 19: re-liquefaction liquid phase adjustment valve; 20: re-liquefaction gas phase adjustment valve; 21: main engine adjustment valve; 22: compressor. DETAILED DESCRIPTION

[0035] The application will be further described below with reference to the accompanying drawings.

[0036] The application proposes a cryogenic medium gas supply system integrated test device and test method, aiming to comprehensively test and verify the key equipment designed in the gas supply system, obtain the operation of the test equipment in the actual gas supply system, identify and solve potential problems as soon as possible, ensure the safety, reliability and economy in actual operation, reduce operating costs and prolong the service life of the equipment.

[0037] In combination Figure 1 , the application is a cryogenic medium gas supply system integrated test device, which comprises a medium storage system, a pump group, a re-liquefaction system, a compressor 22, a heat exchange system, a separation system, a main engine system and a valve system. The related devices in the above-mentioned systems are sequentially connected by pipelines to form an integrated test device, and are divided into four circuits: a cryogenic re-liquefaction circuit a, a compressor test circuit b, a heat exchanger test circuit c and a medium recovery circuit d. Through the control of the pump group and the valve system, the device has the functions of storing medium, supplying gas to the main engine system, flashing the gas of the re-liquefaction medium storage system, recovering the test medium and testing equipment.

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

[0039] The deep cooling re-liquefaction circuit a is arranged with a liquefied medium delivery pump 5, a deep cooling re-liquefaction device 6, a deep cooling medium heater 8 and a deep cooling adjusting valve 16 along the liquid flow direction, and is connected with the inlet of the liquefied medium storage tank 1 after the deep cooling adjusting valve 16; the deep cooling re-liquefaction circuit tests the equipment performance of the deep cooling re-liquefaction device 6 and the deep cooling medium heater 8.

[0040] The compressor test circuit b is arranged with 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 gas and liquid fluid flow direction; the compressor test circuit tests the equipment performance of the low-temperature medium heater 9 and the compressor 22.

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

[0042] The medium recovery circuit d is arranged with a medium recovery adjusting valve 18, a recovery re-liquefaction device 7 and a second gas-liquid separator 15 along the gas and liquid fluid flow direction; two branches are arranged after the second gas-liquid separator 15, one branch is arranged with a re-liquefaction liquid phase adjusting valve 19, the outlet of the re-liquefaction liquid phase adjusting valve 19 is taken as the liquid phase outlet of the medium recovery circuit, and the other branch is arranged with a re-liquefaction gas phase adjusting valve 20, the outlet of the re-liquefaction gas phase adjusting valve 20 is taken as the gas phase outlet of the medium recovery circuit; the inlet of the liquefied medium storage tank 1 is connected after the re-liquefaction liquid phase adjusting valve 19, and the low-temperature medium heater 9 of the compressor test circuit is connected after the re-liquefaction gas phase adjusting valve 20.

[0043] The outlet of the liquefied medium storage tank 1 is connected with the inlet of the deep cooling re-liquefaction circuit a, the inlet of the compressor test circuit b and the inlet of the heat exchanger test circuit c; the outlet of the deep cooling re-liquefaction circuit a is connected with the inlet of the liquefied medium storage tank 1, the first outlet of the heat exchanger test circuit c is connected to the low-temperature gas medium storage tank 2, the second outlet of the heat exchanger test circuit c and the outlet of the compressor test circuit b are connected to the inlet of the medium recovery circuit d and the inlet of the main machine adjusting valve 21, the gas phase outlet of the medium recovery circuit d is connected to the low-temperature medium heater 9, the liquid phase outlet of the medium recovery circuit d is connected to the inlet of the liquefied medium storage tank 1; the outlet of the main machine adjusting valve 21 is connected to the inlet of the gas supply adjusting heat exchanger 10, and the outlet of the gas supply adjusting heat exchanger 10 is connected to the main machine system.

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

[0045] In combination Figure 2 , the deep cooling re-liquefaction circuit a is sequentially arranged with the liquefied medium conveying pump 5, the deep cooling re-liquefaction device 6, the deep cooling medium heater 8 and the deep cooling regulating valve 16 along the medium flow direction, and these components work together to process the flash gas in the liquefied medium storage tank 1, maintain the tank pressure in the normal range, and enable the deep cooling re-liquefaction device 6 and the deep cooling medium heater 8 to be tested. Specifically, when the deep cooling re-liquefaction circuit a is in the working state, the flash gas generated in the liquefied medium storage tank 1 is conveyed into the deep cooling re-liquefaction device 6 by the liquefied medium conveying pump 5, and the medium temperature is reduced to the deep cooling state lower than the liquefaction temperature 5-6℃ in the liquefied medium storage tank 1 after being processed, so as to ensure that the flash gas is completely liquefied and the problem of incomplete liquefaction is avoided, and then the medium is heated to the liquefaction temperature in the liquefied medium storage tank 1 by the deep cooling medium heater 8, and finally returned to the liquefied medium storage tank 1 by the deep cooling regulating valve for storage.

[0046] In combination Figure 3 , the compressor test circuit b is used to provide compressed gas for the main system or to test the compressor 22 and the low-temperature medium heater 9. Specifically, when the compressor test circuit b is in the working state, the liquid medium in the liquefied medium storage tank 1 is first conveyed by the compressed medium conveying pump 3, heated to the tank temperature of the low-temperature gas medium storage tank 2 by the low-temperature medium heater 9, and stored in the low-temperature gas medium storage tank 2. After the storage amount reaches a certain amount, the medium enters the compressor 22 to compress the low-temperature medium, and the medium is compressed to a certain high-temperature and high-pressure state, and then selectively enters the main system or is recycled into the medium recycling circuit d.

[0047] In combination Figure 4 , the heat exchanger test circuit c is used to provide constant-temperature gas for the main system and test the performance of the forced gasifier 11. The liquid medium in the liquefied medium storage tank 1 is conveyed to the forced gasifier 11 by the heat exchange medium conveying pump 4 for vaporization and heat exchange. The low-temperature medium after vaporization 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, is heated to the tank temperature of the low-temperature gas medium storage tank 2, and is stored, and the gas phase part enters the low-load heater 13 for heating, and then selectively enters the main system or is recycled into the medium recycling circuit d.

[0048] In 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-liquefy the medium in the compressor test loop b and the heat exchanger test loop c after the test processing, and store the liquefied medium in the liquefied medium storage tank 1 and the low-temperature gaseous medium storage tank 2. The specific working process is that, in the medium recovery loop d, the recovery and re-liquefaction device 7 reduces the temperature of the processed medium to the liquefaction temperature under the tank pressure, the gas-liquid separation is performed through the second gas-liquid separator 15, the liquid part enters the liquefied medium storage tank 1 for storage through the re-liquefaction liquid phase regulating valve 19, and the gaseous part enters the low-temperature medium heater 9 for heat exchange through the re-liquefaction gaseous phase regulating valve 20, is heated to the tank temperature of the low-temperature gaseous medium storage tank 2 in the low-temperature medium heater 9, and is stored in the low-temperature gaseous medium storage tank 2.

[0049] The test method of the low-temperature medium gas supply system integrated test device of the application is as follows:

[0050] The test device of the application controls the working state of the integrated test device by controlling the operation of the pump set and the opening and closing of the valve system, so that the integrated test device has five working states of deep cryogenic re-liquefaction, compressed gas supply, compressor test, constant-temperature gas supply, and heat exchanger test, and five functions of medium storage, main system gas supply, re-liquefied medium storage system flash gas, test medium recovery, and equipment test.

[0051] When the integrated test device enters the "deep cryogenic re-liquefaction" working state, the liquefied medium delivery pump 5 and the deep cryogenic regulating valve 16 are opened, and the re-liquefaction liquid phase regulating valve 19 is closed, so that the integrated test device only has medium flow in the deep cryogenic re-liquefaction loop a. Specifically, the flash gas generated by the liquefied medium storage tank 1 is delivered into the deep cryogenic re-liquefaction device 6 through the liquefied medium delivery pump 5, the temperature of the medium is reduced to a deep cryogenic state lower than the liquefaction temperature of the liquefied medium storage tank 1 by 5-6℃, the complete liquefaction of the flash gas is ensured, the problem of incomplete liquefaction is avoided, then the medium is heated to the liquefaction temperature of the liquefied medium storage tank 1 in the deep cryogenic medium heater 8, 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 perform liquefaction processing on the flash gas generated in the liquefied medium storage tank 1 or to test the performance of the deep cryogenic re-liquefaction device 6 and the deep 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, the medium recovery regulating valve 18 is closed, and the integrated test device only has medium flow in the compressor test loop b and to the main system. Specifically, the liquid medium in the liquefied medium storage tank 1 is first delivered by the compressed medium delivery pump 3, heated to the tank temperature of the low-temperature gas medium storage tank 2 by the low-temperature medium heater 9, and stored in the low-temperature gas medium storage tank 2. After the storage amount reaches a certain amount, the medium enters the compressor 22 for compression treatment, is compressed to a certain high-temperature and high-pressure state, and then enters the gas supply regulating heat exchanger 10 through the main system regulating valve 21. The high-temperature and high-pressure medium is cooled or heated to the required temperature of the main system, and finally enters the main system. In this state, the integrated test device is used for compressed gas supply to the main 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, and the gas supply regulating valve is closed. The integrated test device only has medium flow in the compressor test loop b and the medium recovery loop d. 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 device testing, is heated to the tank temperature of the low-temperature gas medium storage tank 2, and is stored in the low-temperature gas medium storage tank 2. After the storage amount reaches a certain amount, the medium enters the compressor 22 for compressor 22 performance test, is compressed to a certain high-temperature and high-pressure state, and then enters the medium recovery loop d, enters the recovery and liquefaction device 7 through the medium recovery regulating valve 18, is cooled to the liquefaction temperature under the pressure of the liquefied medium storage tank 1, is subjected to gas-liquid separation 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 test device is used for device testing of 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. The integrated test device only has medium flow in the heat exchanger test loop c and to the main system. Specifically, the liquid medium in the liquefied medium storage tank 1 is delivered by the heat exchange medium delivery pump 4 to the forced gasifier 11 for gasification heat exchange. The low-temperature medium after gasification 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, is heated to the tank temperature of the low-temperature gas medium storage tank 2, and is stored. The gas phase part enters the low-load heater 13, and then enters the gas supply regulating heat exchanger 10 through the main system regulating valve 21. The medium is cooled or heated to the required temperature of the main system, and finally enters the main system. In this state, the integrated test device is used for constant-temperature gas supply to the main system.

[0055] When the integrated test device enters the "heat exchanger test" working state, the heat medium delivery pump 4 and the medium recovery regulating valve 18 are opened, and the gas supply regulating valve is closed, so that 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 gasifier 11 by the heat medium delivery pump 4 for gasification heat exchange, and the gaseous medium after gasification is separated by the first gas-liquid separator 14, and the separated liquid phase is introduced into 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 gaseous medium storage tank 2, and the gaseous phase is introduced into the low-load heater 13, and then enters the medium recovery loop d, and is introduced into the recovery liquefaction 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, and the liquid part is introduced into the liquefied medium storage tank 1, and the gaseous part is heated to the temperature of the low-temperature gaseous medium storage tank 2 by the low-temperature medium heater 9, and is introduced into the low-temperature gaseous medium storage tank 2. In this state, the integrated test device is used for testing the performance of the forced gasifier 11.

[0056] The low-temperature medium gas supply system integrated test device and test method can not only store and supply different state gaseous fuels for the main system, and re-liquefy the flash gas generated in the medium storage system, but also test the deep cooling re-liquefaction device, the deep cooling medium heater, the low-temperature medium heater, the compressor and the forced gasifier of different low-temperature gaseous fuels, simulate the equipment operation under different states, ensure that the equipment can complete sufficient safety test before production, and recycle the test medium.

[0057] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cryogenic medium supply system integrated test device, characterized by: The liquefied medium storage tank (1), the main machine regulating valve (21), the gas supply regulating heat exchanger (10), the main machine system, the deep cooling re-liquefaction circuit, the compressor test circuit, the heat exchanger test circuit and the medium recovery circuit are included; the liquefied medium storage tank (1) is connected with the deep cooling re-liquefaction circuit inlet, the compressor test circuit inlet and the heat exchanger test circuit inlet, the liquefied medium storage tank (1) inlet is connected with the deep cooling re-liquefaction circuit outlet and the medium recovery circuit liquid phase outlet respectively, the medium recovery circuit gas phase outlet is connected with the compressor test circuit; the heat exchanger test circuit first outlet is connected with the compressor test circuit, the heat exchanger test circuit second outlet and the compressor test circuit outlet are connected with the medium recovery circuit inlet, and then connected with the main machine regulating valve (21) inlet; the main machine regulating valve (21) outlet is sequentially connected with the gas supply regulating heat exchanger (10) and the main machine system. The deep cooling re-liquefaction circuit processes the flash gas generated in the liquefied medium storage tank in the re-liquefaction integrated test device, and stabilizes the pressure in the tank and the equipment on the test circuit. The compressor test circuit provides compressed gas for the main machine system and tests the equipment on the test circuit. The heat exchanger test circuit heats the gas supply medium entering the main machine system and tests the equipment on the test circuit. The medium recovery circuit re-liquefies and recovers the test medium flowing through the compressor test circuit and the heat exchanger test circuit for equipment testing. The medium recovery circuit is arranged with a medium recovery regulating valve (18), a re-liquefaction device (7) and a second gas-liquid separator (15) along the gas and liquid flow directions; two branches are arranged behind the second gas-liquid separator (15), one branch is arranged with a re-liquefaction liquid phase regulating valve (19), the re-liquefaction liquid phase regulating valve (19) outlet serves as the medium recovery circuit liquid phase outlet, and the other branch is arranged with a re-liquefaction gas phase regulating valve (20), the re-liquefaction gas phase regulating valve (20) outlet serves as the medium recovery circuit gas phase outlet; the liquefied medium storage tank (1) inlet is connected behind the re-liquefaction liquid phase regulating valve (19), and the low-temperature medium heater (9) on the compressor test circuit is connected behind the re-liquefaction gas phase regulating valve (20).

2. The cryogenic medium supply system integrated test device of claim 1, wherein: The deep cooling re-liquefaction circuit is arranged with a liquefied medium delivery pump (5), a deep cooling re-liquefaction device (6), a deep cooling medium heater (8) and a deep cooling regulating valve (16) along the liquid flow direction, and the liquefied medium storage tank (1) inlet is connected behind the deep cooling regulating valve (16); the deep cooling re-liquefaction circuit tests the deep cooling re-liquefaction device (6) and the deep cooling medium heater (8) equipment performance.

3. The cryogenic medium supply system integrated test device of claim 2, wherein: The compressor test circuit is arranged with 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 gas and liquid flow directions; the compressor test circuit tests the low-temperature medium heater (9) and the compressor (22) equipment performance.

4. The cryogenic medium supply system integrated test device of claim 3, wherein: The heat exchanger test loop is arranged along the gas and liquid fluid flow direction, and is provided with a heat exchange medium delivery pump (4), a forced gasifier (11) and a first gas-liquid separator (14); a branch is arranged behind the first gas-liquid separator (14), one branch is provided with a liquid phase adjusting valve (17) and an air temperature heater (12), and the outlet of the air temperature heater (12) is used as a first outlet of the heat exchanger test loop; the other branch is provided with a low-load heater (13), and the outlet of the low-load heater (13) is used as a second outlet of the heat exchanger test loop; the air temperature heater (12) is connected with a low-temperature gas medium storage tank (2) of the compressor test loop; and the heat exchanger test loop tests the equipment performance of the forced gasifier (11).

5. A method of integrated testing of a cryogenic medium supply system, characterized by: The low-temperature medium gas supply system integrated test device of claim 4 is used, and the method is specifically as follows: The integrated test device includes five working states of deep cooling re-liquefaction, compressed gas supply, compressor test, constant temperature gas supply and heat exchanger test, and the working states of the integrated test device are controlled by controlling the opening and closing of the delivery pumps and the adjusting valves, and the specific control is as follows: In the "deep cooling re-liquefaction" working state of the integrated test device, the liquefied medium delivery pump (5) and the deep cooling adjusting valve (16) are opened, and the deep cooling re-liquefaction circuit has medium flow; in this state, the integrated test device is used for liquefied treatment of flash gas generated in a liquefied medium storage tank or equipment test of a deep cooling re-liquefaction device (6) and a deep cooling medium heater (8); In the "compressed gas supply" working state of the integrated test device, the compressed medium delivery pump (3) and the host adjusting valve (21) are opened, and the compressor test circuit has medium flow and flows to the host system; in this state, the integrated test device compresses the gas supply medium entering the host system to 0.1-1 bar; In the "compressor test" working state of the integrated test device, the compressed medium delivery pump (3) and the medium recovery adjusting valve (18) are opened, and the compressor test circuit and the medium recovery circuit have medium flow; in this state, the integrated test device is used for equipment test of a low-temperature medium heater (9) and a compressor (22); In the "constant temperature gas supply" working state of the integrated test device, the heat exchange medium delivery pump (4) and the host adjusting valve (21) are opened, and the heat exchanger test circuit has medium flow and flows to the host system; in this state, the integrated test device heats the gas supply medium entering the host system to 10-50 degrees Celsius; In the "heat exchanger test" working state of the integrated test device, the heat exchange medium delivery pump (4) and the medium recovery adjusting valve (18) are opened, and the heat exchanger test circuit and the medium recovery circuit have medium flow; in this state, the integrated test device is used for equipment test of the forced gasifier (11).

6. The method of claim 5, wherein: The deep cooling adjusting valve (16) and the re-liquefaction liquid phase adjusting valve (19) cannot be opened at the same time to avoid that the medium in the working circuit enters the non-working circuit; and the host adjusting valve (21) and the medium recovery adjusting valve (18) cannot be opened at the same time.

7. The method of claim 5, wherein: The test working medium of the integrated test device for equipment test is a low-temperature gas fuel including but not limited to nitrogen, hydrogen and natural gas.

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