Pressurizing system

Abstract

The pressurization system comprises a liquid outlet pipeline, a vaporizer, a buffer tank and a heat exchange loop, the liquid outlet pipeline is communicated to a low-temperature container, the vaporizer and the buffer tank are both communicated to the liquid outlet pipeline, and the buffer tank is located on the downstream of the vaporizer, so that the buffer tank can store gaseous media heated and vaporized by the vaporizer. The heat exchange loop is communicated to the buffer tank and is communicated with a circulating pump and a heat exchange device, the circulating pump can drive a gaseous medium in the buffer tank to flow along the heat exchange loop, the heat exchange device is connected to the low-temperature container, and the gaseous medium can conduct heat exchange on the low-temperature container through the heat exchange device; the heat carried by the gaseous medium is transferred into the low-temperature container, and the liquid medium in the low-temperature container absorbs heat and is vaporized, so that the volume of the medium in the low-temperature container is increased, the pressure in the low-temperature container is improved, the low-temperature container can be quickly pressurized when being at a low liquid level, and liquid supply or gas supply of the low-temperature container is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic pressure vessel technology, and in particular to a pressurization system. Background Technology

[0002] Currently, most methods used in the market to increase the pressure inside cryogenic containers employ pressurization circuits. These circuits typically involve vaporizing the liquid LNG inside the cryogenic container, causing the LNG to expand and then guiding the gaseous LNG into the gas phase space within the cryogenic container, thus establishing gas phase pressure above the liquid phase.

[0003] However, in the above-mentioned pressurization methods, when the liquid in the cryogenic container is at a low level or the internal volume of the cryogenic container is large, the pressurization speed of the pressurization system is slow, or even unable to pressurize, resulting in the pressurization effect not meeting the demand, thus leading to insufficient gas supply from the cryogenic container to the outside. Utility Model Content

[0004] The purpose of this invention is to provide a pressurization system that can pressurize a cryogenic container when it is at a low liquid level and increase the pressurization speed.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] According to one aspect of this utility model, a pressurization system is provided, disposed on a cryogenic container. The pressurization system includes: a liquid outlet pipe connected to the cryogenic container for guiding out a liquid medium from within the cryogenic container; a vaporizer connected to the liquid outlet pipe for heating and vaporizing the liquid medium in the liquid outlet pipe to form a gaseous medium; a buffer tank connected to the liquid outlet pipe and located downstream of the vaporizer for buffering the gaseous medium; a gas supply pipe provided on the buffer tank for connecting to an external gas-using device; and a heat exchange circuit connected to the buffer tank. The heat exchange circuit includes a circulation pump and a heat exchange device, the circulation pump driving the gaseous medium in the buffer tank to flow along the heat exchange circuit; the heat exchange device is connected to the cryogenic container so that the gaseous medium can exchange heat with the cryogenic container through the heat exchange device, causing the liquid medium in the cryogenic container to absorb heat and vaporize.

[0007] In one embodiment of this application, the pressurization system further includes a pressure sensor and a controller; the pressure sensor is connected to the cryogenic container to detect the pressure inside the cryogenic container; the controller is communicatively connected to the pressure sensor and the circulation pump, and when the pressure inside the cryogenic container is lower than a preset pressure value, the controller controls the circulation pump to operate to drive the gaseous medium to flow along the heat exchange circuit.

[0008] In one embodiment of this application, the heat exchange circuit is connected to the vaporizer, and the vaporizer is located downstream of the heat exchange device, so that the vaporizer can heat the gaseous medium flowing through the heat exchange device.

[0009] In one embodiment of this application, the pressurization system further includes a temperature sensor; the temperature sensor is connected to the heat exchange circuit and located between the vaporizer and the buffer tank, for detecting the temperature of the gaseous medium flowing back to the buffer tank.

[0010] In one embodiment of this application, the pressurization system further includes a pressurization circuit; one end of the pressurization circuit is connected to the bottom of the cryogenic container, and the other end is connected to the top of the cryogenic container; a heat exchanger is provided on the pressurization circuit to heat the liquid medium flowing through the pressurization circuit.

[0011] In one embodiment of this application, a pressure boosting and regulating valve is connected to the pressurization circuit; the pressure boosting and regulating valve is located between the cryogenic container and the heat exchanger to adjust the pressure within the pressurization circuit.

[0012] In one embodiment of this application, the pressurization system further includes a liquid inlet line; the liquid inlet line is connected to the top of the cryogenic container for adding liquid medium to the cryogenic container; the liquid inlet line includes a liquid inlet check valve, a main safety valve, and a pressure gauge; the liquid inlet check valve is connected to the liquid inlet line for restricting backflow of liquid medium in the liquid inlet line; the main safety valve and the pressure gauge are connected to the liquid inlet line and are located between the liquid inlet check valve and the cryogenic container.

[0013] In one embodiment of this application, the liquid outlet pipeline is sequentially connected to a liquid outlet check valve, a shut-off valve, and a flow limiting valve, and is located between the cryogenic container and the vaporizer.

[0014] In one embodiment of this application, the pressurization system further includes a safety branch; the safety branch is connected to the liquid outlet pipeline and is located between the liquid outlet check valve and the shut-off valve; the safety branch is sequentially connected to a pressure reducing regulating valve and a secondary safety valve.

[0015] In one embodiment of this application, the pressurization system further includes a liquid level sensor; the liquid level sensor is connected to the cryogenic container to detect liquid level information inside the cryogenic container.

[0016] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0017] In this invention, the pressurization system includes a liquid outlet pipe, a vaporizer, a buffer tank, and a heat exchange circuit. The liquid outlet pipe is connected to the cryogenic container, allowing the cryogenic medium inside the container to flow along the outlet pipe. Both the vaporizer and the buffer tank are connected to the liquid outlet pipe, with the buffer tank located downstream of the vaporizer, allowing it to store the gaseous medium heated and vaporized by the vaporizer. The heat exchange circuit is connected to the buffer tank and includes a circulation pump and a heat exchange device. The circulation pump drives the gaseous medium inside the buffer tank to flow along the heat exchange circuit. The heat exchange device is connected to the cryogenic container, allowing the gaseous medium to exchange heat with the cryogenic container. This transfers the heat carried by the gaseous medium to the cryogenic container, causing the liquid medium inside the container to absorb heat and vaporize, thereby increasing the volume of the medium inside the cryogenic container and raising the pressure. This allows for rapid pressurization even when the cryogenic container is at a low liquid level, facilitating liquid or gas supply to the cryogenic container. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the booster system according to an embodiment of the present invention.

[0019] The annotations in the attached figures are explained as follows:

[0020] 1-Cryogenic container; 10-Liquid outlet line; 11-Vaporizer; 12-Buffer tank; 13-Liquid outlet check valve; 14-Stop valve; 15-Flow limiting valve; 16-Safety branch; 17-Pressure reducing and regulating valve; 18-Secondary safety valve; 20-Heat exchange circuit; 21-Circulating pump; 22-Heat exchange device; 31-Pressure sensor; 32-Level sensor; 33-Temperature sensor; 40-Pressure boosting circuit; 41-Heat exchanger; 42-Pressure boosting and regulating valve; 43-First shut-off valve; 44-First flow limiting valve; 45-Second flow limiting valve; 46-Second shut-off valve; 50-Liquid inlet line; 51-Liquid inlet check valve; 52-Main safety valve; 53-Pressure gauge; 121-Gas supply line; 201-Gas intake end; 202-Gas return end. Detailed Implementation

[0021] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0022] In the description of this utility model, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back, etc.) are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications will also change accordingly.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] When the liquid level in the cryogenic container is low or the internal volume of the cryogenic container is large, the pressurization speed of the pressurization system is slow or even unable to pressurize, resulting in insufficient pressurization effect and insufficient gas supply to the outside of the cryogenic container.

[0025] For example, in current self-pressurization systems for LNG vehicle cylinders, a common practice is to create an opening at the lowest permissible point on the cylinder's end cap. This allows the cryogenic liquid to flow out due to the pressure difference in the liquid column, pass through a vaporizer where it absorbs heat and vaporizes, before flowing back into the cylinder's gas phase space, thus achieving pressurization. Specifically, when the cylinder pressure exceeds the set value of the pressure regulating valve, the valve automatically shuts off the pipeline, stopping pressurization. Conversely, when the cylinder pressure falls below the set value, the valve automatically opens, allowing the cryogenic liquid to flow out of the cylinder and absorb heat in the vaporizer, initiating pressurization. However, this self-pressurization system cannot pressurize at low liquid levels, and even at high liquid levels, the pressurization rate is generally very slow. Furthermore, as the cylinder volume increases, the self-pressurization rate decreases further.

[0026] In another type of supercharging, the carburetor in the air supply line is located at its outlet. A pump or similar device pumps some of the gas back into the container to achieve a supercharging effect. However, this method affects the instantaneous air supply volume, easily causing momentary insufficient air supply and a noticeable lag, which impacts engine operation. Furthermore, high-horsepower engines currently consume a large amount of gas instantaneously, resulting in a significant pressure drop in the air supply line during use. Therefore, for supercharging, the pump needs sufficient power, and the air supply line flow rate needs to be high enough to guide the gas in the air supply line into the container and increase the supercharging speed. Additionally, due to space limitations in automotive gas cylinders, the air supply line flow rate cannot be significantly increased, thus limiting the supercharging effect of this method.

[0027] Therefore, in view of the above-mentioned problems, a booster system is proposed to solve them.

[0028] The solution is further illustrated by the following examples:

[0029] Figure 1 This is a schematic diagram of the booster system according to an embodiment of the present invention.

[0030] Please see Figure 1 The pressurization system in this embodiment includes a cryogenic container 1. Specifically, the cryogenic container 1 can be an LNG vehicle cylinder or a container tank for storing cryogenic media. The cryogenic container 1 can store cryogenic media such as LNG, liquefied petroleum gas, liquid oxygen, liquid argon, liquid nitrogen, or liquid carbon dioxide. Furthermore, the cryogenic container 1 can be configured with a double-layer structure, consisting of an inner shell and an outer shell. The inner shell has a cavity for storing the cryogenic media, and the outer shell surrounds the inner shell, with the inner shell and outer shell spaced apart to allow the outer shell to insulate the inner shell.

[0031] In this embodiment, the pressurization system may include a liquid outlet pipe 10, a vaporizer 11, a buffer tank 12, and a heat exchange circuit 20. The liquid outlet pipe 10 is connected to the cryogenic container 1 to guide the liquid medium out of the cryogenic container 1. Specifically, one end of the liquid outlet pipe 10 is connected to the bottom of the cryogenic container 1, allowing the liquid medium in the cryogenic container 1 to flow out along the liquid outlet pipe 10. Simultaneously, the vaporizer 11 is connected to the liquid outlet pipe 10 and can heat the liquid medium in the liquid outlet pipe 10, causing the liquid medium to heat up and vaporize to form a gaseous medium. The buffer tank 12 is connected to the liquid outlet pipe 10 and is located downstream of the vaporizer 11. The buffer tank 12 is used to buffer the gaseous medium; that is, the liquid medium in the cryogenic container 1 flows along the liquid outlet pipe 10 to the vaporizer 11, and after being heated and vaporized by the vaporizer 11, it flows along the liquid outlet pipe 10 to the buffer tank 12 for storage.

[0032] It should be noted that the liquid outlet line 10 can be sequentially connected to a liquid outlet check valve 13, a shut-off valve 14, and a flow restrictor valve 15, and is located between the cryogenic container 1 and the vaporizer 11. The liquid outlet check valve 13 ensures unidirectional flow in the liquid outlet line 10, preventing the medium in the liquid outlet line 10 from flowing back into the cryogenic container 1. The shut-off valve 14 can be used to shut off the liquid outlet line 10, ensuring the safety of the liquid outlet. The flow restrictor valve 15 ensures that the flow rate of the liquid outlet line 10 is within a preset range, preventing excessive flow from affecting the vaporizer 11.

[0033] Meanwhile, the pressurization system may also include a safety branch 16. Specifically, the safety branch 16 is connected to the outlet pipeline 10 and is located between the outlet check valve 13 and the shut-off valve 14. The safety branch 16 is sequentially connected to a pressure reducing and regulating valve 17 and a secondary safety valve 18. When the pressure in the outlet pipeline 10 is too high, the pressure reducing and regulating valve 17 can reduce the pressure in the outlet pipeline 10 between the outlet check valve 13 and the shut-off valve 14, and release the excess pressure through the secondary safety valve 18 to ensure the safety of the outlet pipeline 10.

[0034] In this embodiment, a gas supply pipe 121 may be provided on the buffer tank 12. The gas supply pipe 121 is used to connect to external gas-using equipment, so that the gaseous medium in the buffer tank 12 can be transported to the gas-using equipment along the gas supply pipe 121.

[0035] In addition, the heat exchange circuit 20 can be connected to the buffer tank 12. Specifically, both ends of the heat exchange circuit 20 are connected to the buffer tank 12, that is, the gas intake end 201 and the gas return end 202 are both connected to the buffer tank 12, so that a connected circulation loop can be formed between the heat exchange circuit 20 and the buffer tank 12.

[0036] In this embodiment, a circulating pump 21 and a heat exchange device 22 may be connected to the heat exchange circuit 20.

[0037] The circulating pump 21 is used to drive the gaseous medium in the buffer tank 12 to flow along the heat exchange circuit 20. The heat exchange device 22 is connected to the cryogenic container 1, so that the gaseous medium can exchange heat with the cryogenic container 1 through the heat exchange device 22.

[0038] It should be noted that the heat exchange device 22 is connected to the outer surface of the inner shell of the cryogenic container 1, enabling the heat exchange device 22 to conduct heat to the inner shell, and then conduct heat to the cryogenic medium inside the inner shell cavity, causing the liquid medium inside the cryogenic container 1 to absorb heat and vaporize. Of course, the heat exchange device 22 can also be directly installed inside the cavity of the inner shell of the cryogenic container 1, so that the heat exchange device 22 directly exchanges heat with the cryogenic medium inside the cavity, thereby causing the liquid medium inside the cryogenic container 1 to absorb heat and vaporize.

[0039] Meanwhile, since the temperature of the gaseous medium in the buffer tank 12 is higher than that of the liquid medium in the cryogenic container 1, when the gaseous medium in the buffer tank 12 flows to the heat exchange device 22 under the drive of the circulating pump 21, the gaseous medium can transfer heat to the liquid medium in the cryogenic container 1 through the heat exchange device 22, so that the liquid medium in the cryogenic container 1 is heated and vaporized, thereby increasing the volume of the medium in the cryogenic container 1, and thus increasing the pressure of the medium in the cryogenic container 1, so that the medium in the cryogenic container 1 can flow out of the cryogenic container 1 along the liquid outlet pipe 10.

[0040] Furthermore, since the gaseous medium can directly heat the liquid medium in the cryogenic container 1 through the heat exchange device 22, causing the liquid medium to vaporize, even if the liquid medium in the cryogenic container 1 is at a low liquid level, the liquid medium can be heated and vaporized under the heating of the heat exchange device 22, thereby rapidly increasing the volume of the medium in the cryogenic container 1 and rapidly increasing the pressure in the cryogenic container 1. This solves the problem of slow or no pressurization speed in existing pressurization systems when the cryogenic container is at a low liquid level.

[0041] See Figure 1 The heat exchange circuit 20 is connected to the vaporizer 11, meaning that the heat exchange circuit 20 and the liquid outlet line 10 share the same vaporizer 11. Furthermore, the vaporizer 11 is located downstream of the heat exchange device 22, enabling it to heat the gaseous medium flowing through the heat exchange device 22. Because the gaseous medium in the heat exchange circuit 20 releases heat at the heat exchange device 22 as it flows through it, the temperature of the gaseous medium in the heat exchange circuit 20 downstream of the heat exchange device 22 decreases. Therefore, connecting the vaporizer 11 downstream of the heat exchange device 22 allows the vaporizer 11 to heat the gaseous medium, increasing its temperature and ensuring that the temperature of the gaseous medium returning to the buffer tank 12 remains within a specific temperature range, thus ensuring that the temperature of the gaseous medium supplied from the buffer tank 12 meets the gas supply requirements.

[0042] It should be noted that the vaporizer 11 is a water bath vaporizer to heat and vaporize the liquid medium in the liquid outlet pipeline 10, or to heat the gaseous medium in the heat exchange circuit 20, thereby ensuring that the temperature of the gaseous medium in the buffer tank 12 is maintained within a specific temperature range. Of course, the vaporizer 11 can also be an ambient temperature vaporizer.

[0043] In some other embodiments, a separate heater or vaporizer may be provided on the heat exchange circuit 20 to heat the gaseous medium in the heat exchange circuit 20 so that the gaseous medium can flow back to the buffer tank 12 at a suitable temperature.

[0044] See Figure 1 The pressurization system may also include a pressure sensor 31, a level sensor 32, a temperature sensor 33, and a controller.

[0045] The pressure sensor 31 is connected to the cryogenic container 1, enabling it to detect the pressure inside the container 1 in real time and generate pressure information. The controller is communicatively connected to the pressure sensor 31 and the circulating pump 21, and can identify the pressure inside the cryogenic container 1 through the pressure information. When the pressure inside the cryogenic container 1 is lower than a preset pressure value, the controller can control the circulating pump 21 to operate, causing it to drive the gaseous medium in the buffer tank 12 to flow along the heat exchange circuit 20, and heating the liquid medium inside the cryogenic container 1 at the heat exchange device 22. When the pressure inside the cryogenic container 1 is higher than or equal to the preset pressure value, the controller can control the circulating pump 21 to stop operating. At this time, the gaseous medium in the heat exchange circuit 20 does not flow, and the heat exchange device 22 does not transfer heat to the liquid medium inside the cryogenic container 1, thus preventing pressure buildup inside the cryogenic container 1.

[0046] Meanwhile, temperature sensor 33 is connected to heat exchange circuit 20 and located between vaporizer 11 and buffer tank 12, enabling temperature sensor 33 to detect the temperature of the gaseous medium returning to buffer tank 12. Furthermore, the controller is communicatively connected to temperature sensor 33 and vaporizer 11, allowing the controller to receive the temperature of the gaseous medium detected by temperature sensor 33. When the temperature of the gaseous medium detected by temperature sensor 33 is lower than a preset value, the controller can control the circulation pump 21 to stop operating, thereby maintaining the temperature of the gaseous medium returning to buffer tank 12 within a specific temperature range.

[0047] Furthermore, the liquid level sensor 32 is connected to the cryogenic container 1, enabling it to detect the liquid level information inside the cryogenic container 1. Simultaneously, the liquid level sensor 32 is communicatively connected to the controller, allowing the controller to identify the liquid level height inside the cryogenic container 1 based on the liquid level information.

[0048] It should be noted that when the liquid level in the cryogenic container 1 is lower than a certain preset value, the controller can control the circulation pump 21 to operate, enabling the heat exchange circuit 20 to exchange heat and heat the cryogenic container 1, thereby increasing the pressure inside the cryogenic container 1. Conversely, when the liquid level in the cryogenic container 1 is higher than a certain preset value, the controller controls the circulation pump 21 to stop, meaning the gaseous medium in the heat exchange circuit 20 does not flow, thus saving operating costs.

[0049] See Figure 1 The booster system may also include a booster circuit 40.

[0050] One end of the pressurization circuit 40 is connected to the bottom of the cryogenic container 1, and the other end is connected to the top of the cryogenic container 1. A heat exchanger 41 is installed on the pressurization circuit 40 to heat the liquid medium flowing through it, causing the liquid medium to vaporize and form a gaseous medium, thereby increasing the volume of the medium. When the gaseous medium flows back to the cryogenic container 1, it increases the pressure inside the cryogenic container 1, thus facilitating the discharge of liquid from the cryogenic container 1.

[0051] In addition, a pressure regulating valve 42 is connected to the pressurization circuit 40. The pressure regulating valve 42 is located between the cryogenic container 1 and the heat exchanger 41. When the pressure in the pressurization circuit 40 between the cryogenic container 1 and the heat exchanger 41 is lower than the set value, the pressure regulating valve 42 opens, causing the pressure in the pressurization circuit 40 between the cryogenic container 1 and the heat exchanger 41 to rise to the set value. This allows the pressure regulating valve 42 to adjust the pressure in the pressurization circuit 40, ensuring that the pressure in the pressurization circuit 40 remains stable. This, in turn, ensures that the pressure of the gaseous medium flowing back from the pressurization circuit 40 to the cryogenic container 1 after the liquid medium in the pressurization circuit 40 vaporizes through the heat exchanger 41 remains stable.

[0052] In this embodiment, the pressurization circuit 40 is further equipped with a first shut-off valve 43, a first flow-limiting valve 44, a second flow-limiting valve 45, and a second shut-off valve 46. The first shut-off valve 43 and the first flow-limiting valve 44 are sequentially connected to the pressurization circuit 40 and located between the cryogenic container 1 and the pressure regulating valve 42. The first shut-off valve 43 is located upstream of the first flow-limiting valve 44 to shut off the pressurization circuit 40 or prevent the liquid medium in the pressurization circuit 40 from flowing back into the cryogenic container 1. The first flow-limiting valve 44 regulates the flow rate between the pressure regulating valve 42 and the cryogenic container 1, preventing the flow rate of the liquid medium flowing out of the cryogenic container 1 from affecting the pressure regulating valve 42 and the heat exchanger 41. Simultaneously, the second flow-limiting valve 45 and the second shut-off valve 46 are sequentially connected to the pressurization circuit 40 and located between the heat exchanger 41 and the cryogenic container 1. The second flow-limiting valve 45 is located upstream of the second shut-off valve 46 to control the flow rate of the medium downstream of the heat exchanger 41, preventing excessive flow rate from causing safety hazards to the cryogenic container 1. The second shut-off valve 46 is used to limit the backflow of the medium within the cryogenic container 1.

[0053] It should be noted that in actual use, when the liquid level in the cryogenic container 1 is greater than the preset height and the pressure inside the cryogenic container 1 is lower than the preset pressure value, the pressurization system can use the pressurization circuit 40 alone to pressurize the cryogenic container 1, so that the pressure inside the cryogenic container 1 is always kept within a suitable pressure range, ensuring the liquid discharge efficiency of the outlet pipe 10. At this time, the heat exchange circuit 20 does not participate in the heat exchange and pressurization of the cryogenic container 1, thereby reducing the overall operating cost of the pressurization system.

[0054] When the liquid level in the cryogenic container 1 is lower than the preset height, that is, when the liquid level in the cryogenic container 1 is at a low level, and the pressure in the cryogenic container 1 is lower than the preset pressure value, the pressurization system can simultaneously use the heat exchange circuit 20 and the pressurization circuit 40 to pressurize the cryogenic container 1, thereby improving the overall pressurization performance and pressurization effect of the pressurization system, and ensuring that the pressure in the cryogenic container 1 is always kept within a suitable pressure range.

[0055] Of course, when the liquid level in the cryogenic container 1 is higher than or equal to the preset height, and when the pressure in the cryogenic container 1 is lower than the preset pressure value, the circulation pump 21 can be turned on and the pressurization circuit 40 can be turned off at the same time, so that the heat exchange circuit 20 can perform heat exchange and pressurization on the cryogenic container 1 alone, ensuring that the pressure in the cryogenic container 1 is kept within a suitable pressure range.

[0056] See Figure 1 The pressurization system may also include an inlet line 50.

[0057] One end of the liquid inlet pipe 50 is connected to an external pipe or external container, and the other end is connected to the top of the cryogenic container 1, so that the external pipe or external container can add liquid medium to the cryogenic container 1 through the liquid inlet pipe 50.

[0058] Specifically, the inlet pipeline 50 may include an inlet check valve 51, a main safety valve 52, and a pressure gauge 53. The inlet check valve 51 is connected to the inlet pipeline 50, enabling it to restrict the backflow of liquid medium within the inlet pipeline 50 and prevent the medium in the cryogenic container 1 from flowing out along the inlet pipeline 50. The main safety valve 52 and the pressure gauge 53 are connected to the inlet pipeline 50 and are located between the inlet check valve 51 and the cryogenic container 1. In this embodiment, the main safety valve 52 and the pressure gauge 53 form a branch for detecting and safely releasing the cryogenic container 1, thereby ensuring the safety of the cryogenic container 1.

[0059] In summary, the pressurization system includes a liquid outlet pipe 10, a vaporizer 11, a buffer tank 12, and a heat exchange circuit 20. The liquid outlet pipe 10 is connected to the cryogenic container 1, allowing the cryogenic medium inside the cryogenic container 1 to flow along the liquid outlet pipe 10. The vaporizer 11 and the buffer tank 12 are both connected to the liquid outlet pipe 10, and the buffer tank 12 is located downstream of the vaporizer 11, allowing the buffer tank 12 to store the gaseous medium that has been heated and vaporized by the vaporizer 11. The heat exchange circuit 20 is connected to the buffer tank 12, and the heat exchange circuit 20 is connected to the circulation pump 21 and the heat exchange device 22. The circulation pump 21 can drive the gaseous medium in the buffer tank 12 to flow along the heat exchange circuit 20. The heat exchange device 22 is connected to the cryogenic container 1, and the gaseous medium can exchange heat with the cryogenic container 1 through the heat exchange device 22, so that the heat carried by the gaseous medium is transferred to the cryogenic container 1, and the liquid medium in the cryogenic container 1 absorbs heat and vaporizes, thereby increasing the volume of the medium in the cryogenic container 1 and increasing the pressure in the cryogenic container 1. This allows the cryogenic container 1 to be pressurized quickly even when it is at a low liquid level, which facilitates the supply of liquid or gas to the cryogenic container 1.

[0060] This application also provides a boosting method applicable to the aforementioned boosting system.

[0061] Specifically, the pressurization method includes the following steps:

[0062] S1. The liquid medium in the outlet pipeline 10 is vaporized into a gaseous medium, and the gaseous medium is buffered in the buffer tank 12;

[0063] S2. When the pressure inside the cryogenic container 1 is lower than the preset pressure value, the circulation pump 21 operates to drive the gaseous medium in the buffer tank 12 to flow along the heat exchange circuit 20, so that the gaseous medium can exchange heat with the cryogenic container 1 through the heat exchange device 22, and cause the liquid medium in the cryogenic container 1 to absorb heat and vaporize.

[0064] It should be noted that in step S1, the liquid medium in the cryogenic container 1 flows out along the liquid outlet pipe 10 and vaporizes at the vaporizer 11 to form a gaseous medium. At the same time, the gaseous medium is buffered in the buffer tank 12.

[0065] Furthermore, in step S2, when the pressure inside the cryogenic container 1 is lower than the preset pressure value and the liquid level inside the cryogenic container 1 is lower than the preset height, the circulation pump 21 is turned on, so that the circulation pump 21 drives the gaseous medium in the buffer tank 12 to flow along the heat exchange circuit 20. The gaseous medium exchanges heat with the cryogenic container 1 at the heat exchange device 22, so that the liquid medium inside the cryogenic container 1 absorbs heat and vaporizes, thereby increasing the pressure inside the cryogenic container 1, so that the cryogenic container 1 can be pressurized quickly even when the liquid level is low.

[0066] Of course, when the liquid level in the cryogenic container 1 is higher than or equal to the preset height, and the pressure in the cryogenic container 1 is lower than the preset pressure value, the circulation pump 21 can also be turned on so that the heat exchange circuit 20 can exchange heat and pressurize the cryogenic container 1, ensuring that the pressure in the cryogenic container 1 is kept within a suitable pressure range.

[0067] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A pressurization system, installed on a cryogenic container, characterized in that, The booster system includes: A liquid outlet pipe, which is connected to the cryogenic container, is used to guide the liquid medium inside the cryogenic container out. A vaporizer, connected to the liquid outlet pipe, is used to heat and vaporize the liquid medium in the liquid outlet pipe to form a gaseous medium. A buffer tank, connected to the liquid outlet pipe and located downstream of the vaporizer, is used to buffer the gaseous medium; the buffer tank is provided with a gas supply pipe for connecting to external gas-using equipment. A heat exchange circuit is connected to the buffer tank; The heat exchange circuit is connected to a circulating pump and a heat exchange device. The circulating pump is used to drive the gaseous medium in the buffer tank to flow along the heat exchange circuit. The heat exchange device is connected to the cryogenic container so that the gaseous medium can exchange heat with the cryogenic container through the heat exchange device, and cause the liquid medium in the cryogenic container to absorb heat and vaporize.

2. The booster system according to claim 1, characterized in that, It also includes a pressure sensor and a controller; the pressure sensor is connected to the cryogenic container to detect the pressure inside the cryogenic container; the controller is communicatively connected to the pressure sensor and the circulation pump, and when the pressure inside the cryogenic container is lower than a preset pressure value, the controller controls the circulation pump to operate to drive the gaseous medium to flow along the heat exchange circuit.

3. The booster system according to claim 1, characterized in that, The heat exchange circuit is connected to the vaporizer, and the vaporizer is located downstream of the heat exchange device, so that the vaporizer can heat the gaseous medium flowing through the heat exchange device.

4. The booster system according to claim 2, characterized in that, It also includes a temperature sensor; the temperature sensor is connected to the heat exchange circuit and located between the vaporizer and the buffer tank, for detecting the temperature of the gaseous medium flowing back to the buffer tank.

5. The booster system according to claim 1, characterized in that, It also includes a pressurization circuit; one end of the pressurization circuit is connected to the bottom of the cryogenic container, and the other end is connected to the top of the cryogenic container; a heat exchanger is provided on the pressurization circuit to heat the liquid medium flowing through the pressurization circuit.

6. The booster system according to claim 5, characterized in that, The pressurization circuit is connected to a pressure regulating valve; the pressure regulating valve is located between the cryogenic container and the heat exchanger to adjust the pressure within the pressurization circuit.

7. The booster system according to claim 1, characterized in that, It also includes a liquid inlet line; the liquid inlet line is connected to the top of the cryogenic container for adding liquid medium to the cryogenic container; the liquid inlet line includes a liquid inlet check valve, a main safety valve and a pressure gauge; the liquid inlet check valve is connected to the liquid inlet line for restricting backflow of liquid medium in the liquid inlet line; the main safety valve and the pressure gauge are connected to the liquid inlet line and are located between the liquid inlet check valve and the cryogenic container.

8. The booster system according to claim 1, characterized in that, The liquid outlet pipeline is connected in sequence to a liquid outlet check valve, a shut-off valve, and a flow limiting valve, and is located between the cryogenic container and the vaporizer.

9. The booster system according to claim 8, characterized in that, It also includes a safety branch; the safety branch is connected to the liquid outlet pipeline and is located between the liquid outlet check valve and the shut-off valve; the safety branch is sequentially connected to a pressure reducing regulating valve and a secondary safety valve.

10. The booster system according to claim 1, characterized in that, It also includes a liquid level sensor; the liquid level sensor is connected to the cryogenic container to detect the liquid level information inside the cryogenic container.

Images