A multi-channel liquefied gas conveying device and liquefied gas receiving station system

Abstract

This application provides a multi-channel liquefied gas conveying device and a liquefied gas receiving station system. The multi-channel conveying device is constructed in the liquefied gas receiving station as a high-vacuum insulated multi-channel liquefied gas conveying device. The multi-channel liquefied gas conveying device can run through different functional areas of the liquefied gas receiving station, integrating the main liquid phase pipeline, the main gas phase pipeline, the backup liquid phase pipeline, the backup gas phase pipeline, and the purging pre-cooling pipeline into the same vacuum insulated external pipeline. This can effectively simplify the complexity of the pipeline layout of the liquefied gas receiving station, reduce the cost of pipeline layout, improve the utilization rate of cryogenic working fluid cold energy, increase the service life of the pipeline, and improve the overall transfer efficiency.

Description

Technical Field

[0001] This application relates to the field of liquefied gas technology, and in particular to a multi-channel liquefied gas conveying device and a liquefied gas receiving station system. Background Technology

[0002] Liquefied gas (LNG) storage and transportation is a mainstream technology among many feasible energy storage and transportation solutions for LNG. Compared to storing and transporting LNG in its gaseous phase, storing and transporting LNG in its liquid phase greatly increases energy density while also improving transportation safety. For example, liquid hydrogen transfer requires pipelines to complete the transfer of the working fluid between tanks. Generally, at least two main lines are needed: a liquid phase pipeline and a gas phase pipeline, with auxiliary lines arranged to complete different process flows. Liquid hydrogen transfer places high insulation requirements on the liquid phase pipeline. Liquid hydrogen has a low latent heat of vaporization (449 kJ / kg) and a boiling point of 20.28 K. A small energy input can cause it to vaporize significantly, and pipeline leakage can lead to excessive BOG evaporation losses. Therefore, the liquid phase pipeline has high requirements for insulation technology. The main function of the gas phase pipeline is to connect the gas phase space of the storage tank to achieve pressure balance, reduce transfer resistance, and significantly reduce pump power and transfer time. Gas phase pipelines generally do not require strict insulation, which results in the waste of some gas cooling energy. In particular, liquid hydrogen will have a huge amount of sensible heat cooling energy wasted when it is brought from the low temperature zone to room temperature. Furthermore, the introduction of rewarmed hydrogen into the storage tank through a long gas phase pipeline can easily lead to thermal imbalance in the storage tank, which in turn can cause unstable gas-liquid phase change eddies in the pipeline.

[0003] Typically, the entire process from LNG carrier arrival to unloading takes about 3 days, occupying the main liquid and gaseous phase pipelines for over 72 hours. If the receiving terminal's loading area simultaneously needs to transfer liquid and gaseous products from the tank farm, conflicts in the use of transportation lines will arise. This leads to instability in energy supply and price fluctuations in the end-consumer energy market. To solve this problem, additional liquid and gaseous phase pipelines are often designed and installed in the tank farm to meet the receiving terminal's product transfer needs, increasing costs and operational and maintenance burdens.

[0004] Existing liquefied gas receiving terminals have parallel pipelines that occupy a large area, requiring the construction of pipe racks and supports, and complex structures that combine control and safety valve assemblies with branch lines for each pipeline. Independent pipeline layouts based on function and independent insulation designs to control heat leakage result in high initial design and construction costs, as well as high maintenance costs during operation. Furthermore, there is no effective protection or utilization of the cold energy from gaseous pipelines and purging / pre-cooling pipelines. Traditional liquid hydrogen receiving terminals only have one unloading system for liquid phase unloading pipelines, gaseous return pipelines, and venting pipelines, preventing hydrogen pipeline trailers and liquid hydrogen tank trucks from simultaneously accessing the storage tank area for loading and unloading operations.

[0005] In summary, traditional liquid hydrogen receiving stations suffer from drawbacks such as redundant pipeline layout, unclear functional division, and waste of cold energy, resulting in low overall transfer efficiency. Summary of the Invention

[0006] The purpose of this application is to provide a liquefied gas multi-channel conveying device and a liquefied gas receiving station system.

[0007] The embodiments of this application adopt the following technical solution: a liquefied gas multi-channel conveying device, applied to a liquefied gas receiving station system, wherein the liquefied gas multi-channel conveying device is connected to different functional areas of the liquefied gas receiving station;

[0008] The liquefied gas multi-channel conveying device includes:

[0009] External pipes, sub-pipes, and internal pipe clamps;

[0010] The external pipe has a vacuum-insulated containment space;

[0011] The inner pipe clamp is disposed inside the outer pipe, and the outer surface of the sub-pipe is provided with a heat insulation layer; the inner pipe clamp is used to support the sub-pipe so that the sub-pipe is suspended inside the outer pipe.

[0012] The sub-pipeline includes:

[0013] The main liquid phase pipeline is used to transport liquefied gas in liquid phase;

[0014] The main gas phase pipeline is used to transport liquefied gas in the gas phase.

[0015] A backup liquid phase pipeline is used to transport liquefied gas in liquid phase when the main liquid phase pipeline is in use.

[0016] A backup gas phase pipeline is used to transport liquefied gas in the gas phase when the main gas phase pipeline is in use.

[0017] Purging and precooling pipelines are used to deliver protective gas and / or purging gas to purge, replace or precool target pipelines or equipment.

[0018] The main liquid phase pipeline and the backup liquid phase pipeline can be used simultaneously to deliver the liquefied gas in liquid phase to different functional areas of the liquefied gas receiving station at the same time.

[0019] In some embodiments, the inner diameter of the main liquid phase pipeline is larger than the inner diameter of the backup liquid phase pipeline.

[0020] In some embodiments, the main liquid phase pipeline is located at the center of the outer pipeline, and the main gas phase pipeline, the backup gas phase pipeline, the backup liquid phase pipeline and the purge precooling pipeline are located outside the main liquid phase pipeline, and the main liquid phase pipeline is spaced apart from the main gas phase pipeline, the backup gas phase pipeline, the backup liquid phase pipeline and the purge precooling pipeline respectively.

[0021] In some embodiments, the inner pipe clamps include a plurality of clamps, the outer peripheral surfaces of the plurality of inner pipe clamps being interference-fitted with the inner wall of the outer pipe, and the plurality of inner pipe clamps being spaced apart within the outer pipe to support the sub-pipe at different positions of the sub-pipe.

[0022] In some embodiments, a moisture-proof layer is provided on the outer side of the outer pipe, and a protective layer is provided on the outer side of the moisture-proof layer.

[0023] In some embodiments, each of the sub-pipes is provided with a plurality of external connection ports, which are used to connect to external pipelines or external devices.

[0024] This application embodiment also provides a liquefied gas receiving station system, including a liquefied gas multi-channel conveying device as described in any of the above embodiments and functional areas respectively connected to the liquefied gas multi-channel conveying device. The functional areas include a liquefied gas unloading area, a receiving station control center, a tank area, a liquid phase liquefied gas loading area, and a gas phase liquefied gas loading area.

[0025] The liquefied gas carrier is connected to the liquefied gas unloading area, and the receiving station control center is used to control the opening and closing of the sub-pipelines of the liquefied gas multi-channel conveying device.

[0026] In some embodiments, the tank farm includes a plurality of first liquefied gas storage tanks, and valve groups and reducing adapters are respectively provided on the connecting pipelines between the plurality of first liquefied gas storage tanks and the sub-pipelines;

[0027] The receiving station control center is connected to the valve group and controls the opening and closing of the valve group, thereby controlling the independent connection between the multiple first liquefied gas storage tanks and the sub-pipelines.

[0028] In some embodiments, the gas phase liquefied gas loading area includes a second liquefied gas storage tank, a vaporizer, a pressurizing device, and a filling machine;

[0029] The second liquefied gas storage tank is used to receive liquefied gas from the sub-pipeline;

[0030] The vaporizer is connected to the second liquefied gas storage tank and converts the liquid phase liquefied gas from the second liquefied gas storage tank into the gas phase liquefied gas.

[0031] The pressurizing device is connected to the vaporizer and pressurizes the liquefied gas in the gas phase.

[0032] The filling machine is connected to the pressurization device to fill the pressurized gas phase liquefied gas into the terminal equipment.

[0033] In some embodiments, the liquefied gas unloading area has a liquid discharge arm and a gas return arm. The liquid discharge arm is connected to the liquid phase pipeline of the liquefied gas carrier, and the gas return arm is connected to the gas phase pipeline of the liquefied gas carrier. The liquid discharge arm and the gas return arm are also respectively connected to the bypass pipeline of the liquefied gas unloading area.

[0034] The liquefied gas unloading area also has a drain outlet for emergency discharge of liquefied gas from the liquefied gas unloading area and the liquefied gas transport ship.

[0035] The beneficial effects of the embodiments of this application are as follows:

[0036] Constructing a high-vacuum insulated multi-channel liquefied gas (LNG) transport device at an LNG receiving station can integrate the main liquid phase pipeline, main gas phase pipeline, backup liquid phase pipeline, backup gas phase pipeline, and purging pre-cooling pipeline into a single vacuum-insulated external pipeline. This effectively simplifies the complexity of pipeline layout at the LNG receiving station, reduces pipeline layout costs, improves the utilization rate of cryogenic working fluid cold energy, extends pipeline service life, and increases overall transfer efficiency. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the multi-channel conveying device of this application;

[0039] Figure 2 This is a schematic diagram of the pipe clamp structure in this application;

[0040] Figure 3 This is a schematic diagram of the liquefied gas receiving station system of this application.

[0041] Reference numerals: 100, liquefied gas carrier; 101, liquefied gas unloading area; 102, drain arm; 103, return arm; 104, drain port; 105, bypass pipeline; 200, receiving station control center; 300, multi-channel conveying device; 301, main liquid phase pipeline; 302, main gas phase pipeline; 303, backup liquid phase pipeline; 304, backup gas phase pipeline; 305, purging and precooling pipeline; 306, external pipeline; 3061, support component; 307, internal pipeline clamp; 400, tank area; 401, tank A; 402, tank B; 403, tank C; 500, gas phase liquefied gas loading area; 501, liquid phase liquefied gas loading area; 600, flare. Detailed Implementation

[0042] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0043] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0044] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0045] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0046] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0047] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0048] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0049] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0050] To address the problems in the background art, this application provides a multi-channel liquefied gas conveying device for use in a liquefied gas receiving station system. The multi-channel liquefied gas conveying device is connected to different functional areas of the liquefied gas receiving station.

[0051] Combination Figure 1 The liquefied gas multi-channel conveying device 300 includes an outer pipe 306, sub-pipes, and an inner pipe clamp 307. The outer pipe 306 has a vacuum-insulated containment space. The outer pipe 306 can be, but is not limited to, a metal pipe, and can be composed of multiple pipes joined together. The space inside the outer pipe 306 is the containment space. Sub-pipes are located within the outer pipe 306, and there can be multiple sub-pipes. Each sub-pipe can be independent, and its function is determined according to different transfer technology requirements.

[0052] For example, the sub-pipeline can include five sub-pipelines, which can be divided into a main liquid phase pipe 301, a main gas phase pipe 302, a backup liquid phase pipe 303, a backup gas phase pipe 304, and a purging pre-cooling pipe 305 according to their functions. Each sub-pipeline can be integrated within the outer pipe 306, reducing the space occupied by pipeline layout. Each sub-pipeline can be installed within the outer pipe 306 using an inner pipe clamp 307. That is, the inner pipe clamp 307 is installed within the outer pipe 306 to centrally support each sub-pipeline, allowing the sub-pipelines to be installed independently within the outer pipe 306. The sub-pipelines are suspended within the outer pipe 306; here, "suspended" means that the sub-pipelines do not need to contact each other, and the sub-pipelines do not need to contact the inner wall of the outer pipe 306.

[0053] The inner pipe clamp 307 can be disposed within the outer pipe 306. The outer surface of the sub-pipe can be provided with an insulation layer, but the sub-pipe does not directly contact the inner pipe clamp 307. The insulation layer of the sub-pipe directly contacts the inner pipe clamp 307. Multiple insulation layers can be provided, covering the outer surface of the sub-pipe. The materials of the multiple insulation layers can be the same or different. The inner pipe clamp 307 supports the sub-pipe, allowing it to suspend within the outer pipe 306. For example, the sub-pipe can be secured to the inner pipe clamp 307 using straps or wires (not shown in the figure). Figure 1The inner pipe clamp 307 can be fixed inside the outer pipe 306 by a support member 3061 on the inner wall of the outer pipe. The support member 3061 can extend from the inner wall of the outer pipe 306 towards the center of the outer pipe 306 to cooperate with the inner pipe clamp 307 to support and fix the inner pipe clamp 307. For example, the inner pipe clamp 307 can be welded to the support member 3061. Of course, the inner pipe clamp 307 and the support member 3061 can also have other forms of cooperation and fixation. This is only an example and does not constitute protection within the scope of the claims.

[0054] The vacuum insulation environment of the outer pipe 306 and the insulation layer of the sub-pipes work together to ensure the energy dissipation of the materials transported in the sub-pipes and reduce energy waste.

[0055] For example, the main liquid phase pipeline 301 is used to transport liquefied gas in liquid phase. The main gas phase pipeline 302 is used to transport liquefied gas in gas phase. The standby liquid phase pipeline 303 is used to transport liquefied gas in liquid phase when the main liquid phase pipeline 301 is in use; the standby gas phase pipeline 304 is used to transport liquefied gas in gas phase when the main gas phase pipeline 302 is in use. The purging and precooling pipeline 305 is used to transport protective gas and / or purging gas to purge, replace gas, or precool the target pipeline or target equipment.

[0056] The outer surface of the outer pipe 306 can also be covered with a moisture-proof layer, and a protective layer can be provided on the outer surface of the moisture-proof layer. The moisture-proof layer can be, but is not limited to, an aluminum foil layer, which has good sealing properties and isolates the metal outer pipe 306 from the outside air, preventing the metal outer pipe 306 from rusting. A protective layer can be provided on the outer surface of the moisture-proof layer, for example, but not limited to, a protective layer made of materials such as 304 stainless steel, which is used to protect both the outer pipe 306 and the moisture-proof layer. When arranging the multi-channel liquefied gas conveying device 300, a bracket can be installed on the ground, and the outer pipe 306 can be placed on the bracket. The bracket supports the multi-channel liquefied gas conveying device 300, preventing it from directly contacting the ground and causing corrosion or damage.

[0057] The main liquid phase pipeline 301 and the backup liquid phase pipeline 303 can be used simultaneously to deliver liquefied gas in liquid phase to different functional areas of the liquefied gas receiving station. That is, when the main liquid phase pipeline 301 is in use, if there is still a demand for transporting liquefied gas in liquid phase, the backup liquid phase pipeline 303 can be activated. By having both the main liquid phase pipeline 301 and the backup liquid phase pipeline 303, which are concentrated in the same external pipeline 306, different transport needs for liquefied gas in liquid phase can be met simultaneously. This avoids the space occupation problems caused by the dispersed arrangement of different pipelines and also reduces the cost of implementing dispersed insulation measures due to the dispersed pipeline arrangement.

[0058] In this embodiment, a high-vacuum insulated multi-channel liquefied gas conveying device 300 is constructed at the liquefied gas receiving station. The multi-channel liquefied gas conveying device 300 can run through different functional areas of the liquefied gas receiving station, integrating the main liquid phase pipeline 301, the main gas phase pipeline 302, the backup liquid phase pipeline 303, the backup gas phase pipeline 304, and the purging pre-cooling pipeline 305 into the same vacuum insulated outer pipeline 306. This can effectively simplify the complexity of the pipeline layout of the liquefied gas receiving station, reduce the cost of pipeline layout, improve the utilization rate of cryogenic working fluid cold energy, increase the service life of the pipeline, and improve the overall transfer efficiency.

[0059] When the receiving station is operating normally, the internal space of the external pipeline 306 of the multi-channel conveying device 300 can be continuously pumped with a mechanical pump to ensure that the vacuum level of the internal space meets the insulation requirements for liquid hydrogen transfer. That is, the liquefied gas multi-channel conveying device 300 integrates five sub-pipelines with different functions: main liquid phase pipeline 301, main gas phase pipeline 302, backup liquid phase pipeline 303, backup gas phase pipeline 304, and purging pre-cooling pipeline 305. Only one line of vacuum equipment is needed to complete the vacuuming operation of the external pipeline 306, which greatly simplifies the site pipeline layout and reduces the initial construction cost and operation and maintenance cost.

[0060] Furthermore, different sub-pipelines have different insulation requirements, with liquid phase pipelines having the most stringent insulation requirements. In this application, the sub-pipelines are integrated within the high-vacuum insulated outer pipeline 306. Through multiple layers of insulation materials and the vacuum, convective and radiative heat transfer are greatly reduced, minimizing energy loss and preserving the cold energy of the transported liquefied gas. This allows for the utilization of the cryogenic working fluid's cooling capacity in other scenarios requiring cold energy.

[0061] Furthermore, the combination of two sets of liquid phase pipelines and gas phase pipelines ensures that unloading operations on the main liquid phase pipeline 301 do not affect the normal operation of other businesses at the liquefied gas receiving station. Other loading and unloading operations can still be carried out using the backup liquid phase pipeline 303 and backup gas phase pipeline 304.

[0062] In some embodiments, the inner diameter of the main liquid phase pipeline 301 can be larger than the inner diameter of the backup liquid phase pipeline 303. Alternatively, the diameter of the main liquid phase pipeline 301 can be set to its maximum. The main liquid phase pipeline 301 can serve as the primary pipeline for transporting liquid-phase liquefied gas; a larger diameter main liquid phase pipeline 301 can improve the transport efficiency of the liquid-phase liquefied gas. Here, the liquid-phase liquefied gas can be, but is not limited to, liquid hydrogen. The backup liquid phase pipeline 303 can serve as an auxiliary pipeline for transporting liquid hydrogen, which can meet the needs of application scenarios with relatively low transport speed requirements. The main liquid phase pipeline 301 has the largest diameter and is the main pipeline used for loading and unloading liquid hydrogen. The main gas phase pipeline 302 is used to connect the liquid hydrogen source tank and the target tank during transfer. The backup liquid phase pipeline 303 has a smaller diameter and is an auxiliary pipeline for loading and unloading liquid hydrogen. It is mainly used for the liquid hydrogen storage at the liquid hydrogen receiving station to be transported outwards, and can also be used for liquid hydrogen unloading when necessary. The backup gas phase pipeline 304 has basically the same function as the main gas phase pipeline 302. The purging and precooling pipeline 305 is designed as the main pipeline to meet the purging, replacement, and precooling needs of various hydrogen-related equipment at the receiving station. It mainly transports protective gas and purging gas.

[0063] In some embodiments, continue to combine Figure 1 The main liquid phase pipeline 301 is located at the center of the outer pipeline 306. The main gas phase pipeline 302, the backup gas phase pipeline 304, the backup liquid phase pipeline 303, and the purging precooling pipeline 305 are respectively located outside the main liquid phase pipeline 301. Because the main liquid phase pipeline 301 transports liquefied gas in liquid phase, which has a relatively high density, in order to ensure the stability of the entire liquefied gas multi-channel conveying device 300 during the transportation process, the main liquid phase pipeline 301 can be located at the center of the outer pipeline 306, or at a position slightly below the center of the outer pipeline 306.

[0064] The main liquid phase pipeline 301 is spaced apart from the main gas phase pipeline 302, the backup gas phase pipeline 304, the backup liquid phase pipeline 303, and the purging precooling pipeline 305 to prevent contact between the sub-pipes and energy transfer between different sub-pipes (even if it occurs, it is only a small amount of heat transfer). It also prevents contact friction between sub-pipes from affecting the outer surface of the sub-pipes, thereby avoiding affecting the service life of the sub-pipes.

[0065] In some embodiments, multiple inner pipe clamps 307 are included, and the outer peripheral surfaces of the multiple inner pipe clamps 307 are interference-fitted with the inner wall of the outer pipe 306 to ensure that the inner pipe clamps 307 do not slip within the outer pipe 306. Furthermore, the multiple inner pipe clamps 307 are spaced apart within the outer pipe 306 to support the sub-pipe at different positions. Specifically, the arrangement of the inner pipe clamps 307 can be based on the load-bearing capacity of the outer pipe 306, and they can be arranged at intervals to ensure the stability of the sub-pipe within the outer pipe 306.

[0066] The internal pipe clamp 307 can be made of metal or rigid plastic sheet, etc. The specific material is not limited here, as long as it provides strong support for the sub-pipe.

[0067] In addition, combined Figure 2 The structure of the inner pipe clamp 307 can also be adapted to the arrangement of the sub-pipes within the outer pipe 306. For example, if the main liquid phase pipe 301 is located at the center of the outer pipe 306, a mounting hole corresponding to the main liquid phase pipe 301 can be provided at the center of the inner pipe clamp 307, allowing the main liquid phase pipe 301 to pass through the mounting hole and be installed within the outer pipe 306. Simultaneously, mounting positions can be provided around the mounting hole of the inner pipe clamp 307 for the main gas phase pipe 302, the backup liquid phase pipe 303, the backup gas phase pipe 304, and the purging precooling pipe 305, respectively. These mounting positions can be provided as mounting holes.

[0068] In some embodiments, each sub-pipeline is provided with multiple external connection ports for connecting to external pipelines or external equipment. For example, the external connection ports can be connected to the storage tanks of a liquefied gas receiving station via connecting pipelines. Alternatively, they can be connected to the loading pipeline of the liquefied gas receiving station to load liquefied gas onto terminal equipment. The terminal equipment can be a liquid hydrogen tanker truck.

[0069] This application also provides a liquefied gas receiving station system, such as... Figure 3 As shown, the system includes a liquefied gas multi-channel conveying device 300 as described in any of the above embodiments, and functional areas connected to the liquefied gas multi-channel conveying device 300. The functional areas include a liquefied gas unloading area 101, a receiving station control center 200, a tank area 400, a liquid-phase liquefied gas loading area 501, and a gas-phase liquefied gas loading area 500. The following description uses liquid hydrogen as an example of liquefied gas.

[0070] The liquefied gas carrier 100 is connected to the liquefied gas unloading area 101, and the receiving station control center 200 is used to control the opening and closing of the sub-pipelines of the liquefied gas multi-channel conveying device 300.

[0071] For example, taking a liquid hydrogen transport ship as an example, it is a seagoing transport ship equipped with liquid hydrogen storage tanks and hose interfaces required for loading and unloading liquid hydrogen. The liquefied gas unloading area 101 may have unloading arm hoses connecting the liquid phase pipelines and gas phase pipelines of the liquid hydrogen transport ship. The liquid hydrogen unloading area has an emergency vent and a purging pipeline interface, which can be connected to the receiving station control center 200. The receiving station control center 200 is the core of the entire station's control and the location of the receiving station's PLC unit. It is equipped with a cryogenic cold source, a vaporizer, and a high-purity purging gas storage tank. During the purging, replacement, and precooling processes, the liquid hydrogen unloading area pipelines and at least some sub-pipelines of the multi-channel conveying device 300 can be connected for purging and / or precooling in different areas.

[0072] Tank farm 400 may include multiple primary liquefied gas storage tanks, which may be independent of each other. Each primary liquefied gas storage tank is equipped with a valve assembly and a reducing adapter on the connecting pipeline between itself and the sub-pipeline. The reducing adapter allows for connection between pipelines of different diameters; that is, the connecting pipeline can connect to the external inlet of the sub-pipeline.

[0073] The receiving station control center 200 is connected to the valve group and controls its on / off state, thereby controlling the independent connection between multiple first liquefied gas storage tanks and sub-pipelines. Continuing with the above embodiments, the valve group can include multiple control valves, which can be on / off valves. Each sub-pipeline can have a separate control valve on its connection to the first liquefied gas storage tank. For example, an on / off valve can be installed on the connection between the main liquid phase pipeline 301 and the first liquefied gas storage tank, an on / off valve on the connection between the backup liquid phase pipeline 303 and the first liquefied gas storage tank, an on / off valve on the connection between the main gas phase pipeline 302 and the first liquefied gas storage tank, an on / off valve on the connection between the backup gas phase pipeline 304 and the first liquefied gas storage tank, and an on / off valve on the connection between the purging cooling pipeline and the first liquefied gas storage tank. Each on / off valve can be controlled independently to meet the different functional requirements of the receiving station system. That is, depending on the valve group on the connecting branch, the first liquefied gas storage tanks can independently undergo liquid hydrogen transfer processes or be stored statically without mutual interference.

[0074] The liquefied gas receiving station system may also include a flare 600. The flare 600 connects to the main vent pipe of the receiving station, where waste gas generated within the station is either vented or burned. A hydrogen storage facility is designed to allow for hydrogen recovery and reuse instead of direct venting, provided the hydrogen purity meets usage requirements. A multi-channel conveying device 300 integrates multiple interfaces, including gas and liquid phase pipelines from the liquid hydrogen unloading area, within a single high-vacuum insulated rigid pipe. This connects the storage tank area 400, the loading gas hydrogen loading area, the liquid hydrogen loading area, and the venting flare 600 (BOG), via branch pipelines.

[0075] In some embodiments, the gas phase liquefied gas loading area 500 includes a second liquefied gas storage tank, a vaporizer, a pressurizing device, and a filling machine.

[0076] The second liquefied gas storage tank receives liquefied gas from the sub-pipeline. A vaporizer is connected to the second liquefied gas storage tank and converts the liquid-phase liquefied gas from the second tank into a gaseous-phase liquefied gas. A pressurization unit is connected to the vaporizer and pressurizes the gaseous-phase liquefied gas. A dispensing machine is connected to the pressurization unit to dispense the pressurized gaseous-phase liquefied gas to the terminal equipment.

[0077] For example, in conjunction with the above embodiments, the gas phase liquefied gas loading area 500 is equipped with an independent small cryogenic second liquefied gas storage tank to receive liquid hydrogen from the multi-channel conveying device 300. The liquid hydrogen is converted into hydrogen gas through a vaporizer, and the hydrogen gas is pressurized by a pressurizing device (high-pressure liquid hydrogen pump or hydrogen compressor). Finally, the hydrogen gas is injected into the hydrogen pipeline trailer or transported to the downstream terminal through a filling machine.

[0078] The liquid hydrogen loading area (liquid phase liquefied gas loading area 501) is equipped with important equipment such as liquid hydrogen transfer centrifugal pumps and liquid flow meters required for liquid hydrogen loading and unloading. These are integrated in a skid-mounted form. The transfer docking with the liquid hydrogen tank truck is completed in this area. The loading or unloading of liquid hydrogen can be controlled by the pressure difference between the two ends of the transfer.

[0079] In some embodiments, the liquefied gas unloading area 101 has a drain arm 102 and a return gas arm 103. The drain arm 102 is connected to the liquid phase pipeline of the liquefied gas transport vessel 100, and the return gas arm 103 is connected to the gas phase pipeline of the liquefied gas transport vessel 100. The drain arm 102 and the return gas arm 103 are also connected to the bypass pipeline 105 of the liquefied gas unloading area for purging.

[0080] The liquefied gas unloading area also has a drain port 104, and a drain arm 102 can be connected to the drain port 104 for emergency discharge of liquefied gas from the liquefied gas unloading area 101 and the liquefied gas transport ship 100.

[0081] As one feasible embodiment, taking liquid hydrogen as an example of liquefied gas, the first liquefied gas storage tank in tank farm 400 includes storage tank A 401, storage tank B 402, and storage tank C 403. At this time, the liquid hydrogen receiving station is receiving liquid hydrogen from a 100-ton liquid hydrogen transport ship transferring liquid hydrogen to storage tank A 401 in tank farm 400. Simultaneously, the liquid hydrogen transport ship 100 is unloading liquid hydrogen, occupying the main liquid phase pipeline 301 and the main gas phase pipeline 302 of the multi-channel conveying device 300. Meanwhile, storage tank B 402 in tank farm 400 uses the spare liquid phase pipeline 303 and the spare gas phase pipeline 304 of the multi-channel conveying device 300 to transfer liquid hydrogen to liquid hydrogen tank trucks in the liquid hydrogen loading area. At the same time, storage tank C 403 in tank farm 400, being newly used, requires gas replacement and purity monitoring. High-purity purging gas is controlled by the receiving station control center 200 to enter the purging pre-cooling pipeline 305 and then enters storage tank C through branch pipelines. 403, complete the gas replacement of storage tank C 403 and its supporting pipes and valves.

[0082] The foregoing has described in detail several embodiments of this application, but this application is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications based on the concept of this application, and all such variations and modifications should fall within the scope of protection claimed in this application.

Claims

1. A multi-channel liquefied gas conveying device, characterized in that, Applied to a liquefied gas receiving station system, the liquefied gas multi-channel conveying device is connected to different functional areas of the liquefied gas receiving station; The liquefied gas multi-channel conveying device includes: External pipe, sub-pipe, and internal pipe clamps; The external pipe has a vacuum-insulated containment space; The inner pipe clamp is disposed inside the outer pipe, and the outer surface of the sub-pipe is provided with a heat insulation layer; the inner pipe clamp is used to support the sub-pipe so that the sub-pipe is suspended inside the outer pipe. The sub-pipeline includes: The main liquid phase pipeline is used to transport liquefied gas in liquid phase; The main gas phase pipeline is used to transport liquefied gas in the gas phase. A backup liquid phase pipeline is used to transport liquefied gas in liquid phase when the main liquid phase pipeline is in use. A backup gas phase pipeline is used to transport liquefied gas in the gas phase when the main gas phase pipeline is in use. Purging and precooling pipelines are used to deliver protective gas and / or purging gas to purge, replace or precool target pipelines or equipment. The main liquid phase pipeline and the backup liquid phase pipeline can be used simultaneously to deliver the liquefied gas in liquid phase to different functional areas of the liquefied gas receiving station at the same time.

2. The liquefied gas multi-channel conveying device according to claim 1, characterized in that, The inner diameter of the main liquid phase pipeline is larger than the inner diameter of the backup liquid phase pipeline.

3. The liquefied gas multi-channel conveying device according to claim 1, characterized in that, The main liquid phase pipeline is located at the center of the outer pipeline. The main gas phase pipeline, the backup gas phase pipeline, the backup liquid phase pipeline, and the purge precooling pipeline are located outside the main liquid phase pipeline, and there is a distance between the main liquid phase pipeline and the main gas phase pipeline, the backup gas phase pipeline, the backup liquid phase pipeline, and the purge precooling pipeline.

4. The liquefied gas multi-channel conveying device according to claim 1, characterized in that, The inner pipe clamps include multiple clamps, the outer peripheral surfaces of the multiple inner pipe clamps are interference-fitted with the inner wall of the outer pipe, and the multiple inner pipe clamps are spaced apart inside the outer pipe to support the sub-pipe at different positions of the sub-pipe.

5. The liquefied gas multi-channel conveying device according to claim 1, characterized in that, A moisture-proof layer is provided on the outside of the external pipe, and a protective layer is provided on the outside of the moisture-proof layer.

6. The liquefied gas multi-channel conveying device according to claim 1, characterized in that, Each of the sub-pipes is provided with multiple external connection ports, which are used to connect to external pipelines or external equipment.

7. A liquefied gas receiving station system, characterized in that, It includes a liquefied gas multichannel conveying device as described in any one of claims 1 to 6 and functional areas respectively connected to the liquefied gas multichannel conveying device. The functional areas include a liquefied gas unloading area, a receiving station control center, a tank area, a liquid phase liquefied gas loading area, and a gas phase liquefied gas loading area. The liquefied gas carrier is connected to the liquefied gas unloading area, and the receiving station control center is used to control the opening and closing of the sub-pipelines of the liquefied gas multi-channel conveying device.

8. The liquefied gas receiving station system according to claim 7, characterized in that, The tank farm includes multiple first liquefied gas storage tanks, and valve groups and reducing adapters are respectively installed on the connecting pipelines between the multiple first liquefied gas storage tanks and the sub-pipelines. The receiving station control center is connected to the valve group and controls the opening and closing of the valve group, thereby controlling the independent connection between the multiple first liquefied gas storage tanks and the sub-pipelines.

9. The liquefied gas receiving station system according to claim 7, characterized in that, The liquefied gas loading area in the gas phase includes a second liquefied gas storage tank, a vaporizer, a pressurization device, and a filling machine; The second liquefied gas storage tank is used to receive liquefied gas from the sub-pipeline; The vaporizer is connected to the second liquefied gas storage tank and converts the liquid phase liquefied gas from the second liquefied gas storage tank into the gas phase liquefied gas. The pressurizing device is connected to the vaporizer and pressurizes the liquefied gas in the gas phase. The filling machine is connected to the pressurization device to fill the pressurized gas phase liquefied gas into the terminal equipment.

10. The liquefied gas receiving station system according to claim 7, characterized in that, The liquefied gas unloading area has a liquid discharge arm and a gas return arm. The liquid discharge arm is connected to the liquid phase pipeline of the liquefied gas transport ship, and the gas return arm is connected to the gas phase pipeline of the liquefied gas transport ship. The liquid discharge arm and the gas return arm are also connected to the bypass pipeline of the liquefied gas unloading area. The liquefied gas unloading area also has a drain outlet for emergency discharge of liquefied gas from the liquefied gas unloading area and the liquefied gas transport ship.

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