Liquefied gas multichannel conveying device and liquefied gas receiving station system

Abstract

According to the liquefied gas multi-channel conveying device and the liquefied gas receiving station system, a high-vacuum heat-insulation liquefied gas multi-channel conveying device is built in a liquefied gas receiving station, and the liquefied gas multi-channel conveying device can penetrate through different functional areas of the liquefied gas receiving station; the main liquid-phase pipeline, the main gas-phase pipeline, the standby liquid-phase pipeline, the standby gas-phase pipeline and the purging precooling pipeline are integrated in the same vacuum heat-insulating outer pipeline, so that the complexity of pipeline arrangement of the liquefied gas receiving station can be effectively simplified, the cost of pipeline arrangement is reduced, the cold energy utilization rate of a low-temperature working medium is increased, and the service life of the pipelines is prolonged; and the comprehensive transfer injection efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of liquefied gas, and in particular to a liquefied gas multi-channel transportation device and a liquefied gas receiving station system. Background Art

[0002] Liquefied gas storage and transportation is one of the mainstream feasible technical solutions for liquefied gas in energy storage and transportation. Compared with the storage and transportation of gaseous liquefied gas, the storage and transportation of liquid liquefied gas greatly improves the energy storage density and improves the safety of transportation. For example, liquid hydrogen transfer requires a transmission pipeline to complete the working medium transportation between tanks. Generally, at least two main lines, liquid phase pipeline and gas phase pipeline, are required, and auxiliary lines for completing different process technologies will be arranged on them. Liquid hydrogen transfer has high insulation requirements for liquid phase pipelines. The latent heat of vaporization of liquid hydrogen is low (449kJ / kg) and the boiling point is 20.28K. A small energy input can make it vaporize in large quantities. Pipeline heat leakage will cause excessive BOG evaporation loss. Therefore, the liquid phase pipeline has high requirements for insulation technology layout. 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 work and transfer time. Gas phase pipelines generally do not require strict insulation, which results in a partial waste of gas cooling energy. In particular, when liquid hydrogen is heated from a low temperature zone to room temperature, a huge amount of sensible cooling energy will be wasted. In addition, the reheated hydrogen gas passed through a long gas phase pipeline into the storage tank is likely to cause thermal imbalance in the storage tank, which in turn leads to the generation of unstable gas-liquid phase change vortices in the pipe.

[0003] Generally, the whole process of unloading LNG takes about 3 days from the arrival of the LNG tanker to the completion of unloading, and occupies the main liquid phase pipeline and gas phase pipeline for more than 72 hours. If the loading area of ​​the receiving station needs to transfer liquid and gas products from the tank area at the same time, there will be a conflict in the use of the transportation line. This leads to unstable output on the energy supply side and price fluctuations in the energy terminal consumer market. To solve this problem, additional liquid phase pipelines and gas phase pipelines are often designed and arranged in the tank area to meet the outbound transfer needs of the receiving station products, which increases cost expenditure and operation and maintenance pressure.

[0004] The existing liquefied gas receiving station pipelines are placed in parallel and occupy a large space. It is necessary to build a pipe gallery and pipe bracket at the same time. The structure is complex, combining the control, safety valve group and branch line of each pipeline. The independent layout of the pipelines is divided according to the function of the pipelines, and the insulation form is independently designed to control heat leakage. The initial design and construction costs are high, and the maintenance costs are high during the later operation. There is no effective protection and utilization of the cold energy of the gas phase pipeline and the purge precooling pipeline. The traditional liquid hydrogen receiving station is only equipped with a set of unloading equipment for the liquid phase unloading pipeline, the gas phase return gas pipeline and the venting pipeline. The hydrogen pipe trailer and the liquid hydrogen tank truck cannot enter the site at the same time to connect to the storage tank area for loading and unloading operations.

[0005] In summary, the unloading and loading pipeline layout of the traditional liquid hydrogen receiving station has the disadvantages of redundant line layout, unclear functional division, and waste of cold energy, resulting in low overall transfer efficiency. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide a liquefied gas multi-channel transportation device and a liquefied gas receiving station system.

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

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

[0009] Clamps for outer pipes, sub-pipes and inner pipes;

[0010] The outer pipe has a vacuum-insulated accommodation space;

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

[0012] The sub-pipeline includes:

[0013] A main liquid phase pipeline for conveying liquefied gas in liquid phase;

[0014] A main gas phase pipeline for conveying liquefied gas in gas phase;

[0015] a standby liquid phase pipeline, which is used to transport liquefied gas in liquid phase when the main liquid phase pipeline is in use;

[0016] a spare gas phase pipeline, which is used to transport liquefied gas in gas phase when the main gas phase pipeline is in use;

[0017] A purge and precooling pipeline, which is used to transport protective gas and / or purge gas to purge, replace gas or precool the target pipeline or target equipment;

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

[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 arranged 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 arranged on the outside of 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 respectively.

[0021] In some embodiments, the inner pipe clamp includes a plurality of inner pipe clamps, the outer circumferential surfaces of the plurality of inner pipe clamps are interference fit with the inner wall of the outer pipe, and the plurality of inner pipe clamps are arranged at intervals in the outer pipe to support the sub-pipe at different positions of the sub-pipe.

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

[0023] In some embodiments, each of the sub-pipelines is provided with a plurality of external pipe ports, and the external pipe ports are used to be connected to an external pipeline or an external device.

[0024] The embodiment of the present application further provides a liquefied gas receiving station system, comprising 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 comprising 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 transport ship 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 transportation device.

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

[0027] The control center of the receiving station is connected to the valve group and controls the on-off of the valve group, thereby controlling the independent connection relationship between the 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 the liquefied gas from the sub-pipeline;

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

[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 pressurizing 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 transport ship, the gas return arm is connected to the gas phase pipeline of the liquefied gas transport ship, and 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 liquid discharge port 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 the present application are:

[0036] A high-vacuum insulated liquefied gas multi-channel transportation device is built at the liquefied gas receiving station. The liquefied gas multi-channel transportation device can run through different functional areas of the liquefied gas receiving station, and integrate the main liquid phase pipeline, main gas phase pipeline, spare liquid phase pipeline, spare gas phase pipeline and purge pre-cooling pipeline in the same vacuum insulated outer pipeline. It 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 comprehensive transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

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

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

[0041] Figure numerals: 100, liquefied gas transport ship; 101, liquefied gas unloading area; 102, drain arm; 103, gas 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, spare liquid phase pipeline; 304, spare gas phase pipeline; 305, purge precooling pipeline; 306, outer pipeline; 3061, support; 307, inner pipeline clamp; 400, tank area; 401, storage tank A; 402, storage tank B; 403, storage tank C; 500, gas phase liquefied gas loading area; 501, liquid phase liquefied gas loading area; 600, venting torch. DETAILED DESCRIPTION

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

[0043] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0044] The accompanying drawings, which are incorporated in and constitute a part of the 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 characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

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

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

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

[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 the present application.

[0050] In order to solve the problems in the background technology, the present application provides a liquefied gas multi-channel transport device, which is applied to a liquefied gas receiving station system. The liquefied gas multi-channel transport 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, a sub-pipeline and an inner pipe clamp 307. The outer pipe 306 has a vacuum-insulated accommodation space. The outer pipe 306 can be, but is not limited to, a metal pipe. The outer pipe can be composed of multiple pipes spliced ​​together. The inner space of the outer pipe 306 is the accommodation space. The sub-pipeline is arranged in the outer pipe 306, and the sub-pipeline can include multiple sub-pipelines. Each sub-pipeline can be independent of each other, and the functions of the sub-pipelines are divided according to different transfer technology requirements.

[0052] For example, the sub-pipelines may include five, and the five sub-pipelines may be divided into a main liquid phase pipeline 301, a main gas phase pipeline 302, a spare liquid phase pipeline 303, a spare gas phase pipeline 304, and a purge precooling pipeline 305 according to the functions of each sub-pipeline. Each sub-pipeline may be integrated into the outer pipeline 306 to reduce the space occupied by the pipeline layout. Each sub-pipeline may be arranged in the outer pipeline 306 through an inner pipeline clamp 307. That is, the inner pipeline clamp 307 is arranged in the outer pipeline 306 to centrally support each sub-pipeline, so that the sub-pipelines can be arranged in the outer pipeline 306 independently of each other. The sub-pipeline is suspended in the outer pipeline 306, and the suspension here means that the sub-pipelines may not contact each other, and the sub-pipeline may not contact the inner wall of the outer pipeline 306.

[0053] The inner pipe clamp 307 can be arranged inside the outer pipe 306, and the outer surface of the sub-pipe can be provided with an insulation layer, and the sub-pipe does not directly contact the inner pipe clamp 307. The insulation layer of the sub-pipe is directly in contact with the inner pipe clamp 307. The insulation layer can be provided in multiple layers, and the multiple insulation layers can be coated on 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 is used to support the sub-pipe so that the sub-pipe is suspended inside the outer pipe 306. For example, the sub-pipe can be tied to the inner pipe clamp 307 by means of a strap or a metal wire (not shown in the figure). Figure 1, the inner pipe clamp 307 can be fixed in the outer pipe 306 by the 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 toward 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 306 can also have other forms of cooperation and fixing, which are only used as examples and do not constitute protection for the scope of the claims.

[0054] The dual functions of the vacuum insulation environment of the outer pipe 306 and the insulation layer of the sub-pipeline can well ensure the energy dissipation of the material transported in the sub-pipeline and reduce energy waste.

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

[0056] The outer surface of the outer pipe 306 may also be coated with a moisture-proof layer, and the outer surface of the moisture-proof layer may be provided with a protective layer. The moisture-proof layer may 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 to prevent the metal outer pipe 306 from rusting. The outer surface of the moisture-proof layer may be coated with a protective layer, for example, the protective layer may be made of, but is not limited to, 304 stainless steel or other materials, and the protective layer is used to protect the outer pipe 306 and the moisture-proof layer. When arranging the multi-channel conveying device 300 for liquefied gas, a bracket may be set on the ground, and the outer pipe 306 may be set on the bracket, and the multi-channel conveying device 300 for liquefied gas is supported by the bracket to prevent it from being corroded or damaged by direct contact with the ground.

[0057] The main liquid phase pipeline 301 and the backup liquid phase pipeline 303 can be used at the same time to simultaneously transport the liquid phase liquefied gas 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 the transportation of the liquid phase liquefied gas, the backup liquid phase pipeline 303 can be started, and the main liquid phase pipeline 301 and the backup liquid phase pipeline 303 concentrated in the same outer pipeline 306 can simultaneously meet the different transportation needs of the liquid phase liquefied gas. This avoids the space occupation problem caused by the dispersed arrangement of different pipelines, and also reduces the cost of dispersed insulation measures due to the dispersed arrangement of pipelines.

[0058] In the embodiment of the present application, a high-vacuum insulated liquefied gas multi-channel conveying device 300 is constructed at the liquefied gas receiving station. The liquefied gas multi-channel conveying device 300 can run through different functional areas of the liquefied gas receiving station, and integrate the main liquid phase pipeline 301, the main gas phase pipeline 302, the spare liquid phase pipeline 303, the spare gas phase pipeline 304 and the purge pre-cooling pipeline 305 in the same vacuum insulated outer pipeline 306, which 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 the cold energy of the cryogenic working fluid, increase the service life of the pipeline, and improve the comprehensive transfer efficiency.

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

[0060] Moreover, the sub-pipelines have different requirements for insulation, and the liquid phase pipeline has the most stringent insulation requirements. In this application, the sub-pipelines are integrated into the high vacuum insulated outer pipeline 306, and the convection and radiation heat transfer are greatly reduced through multiple layers of insulation materials and vacuum, which can minimize the loss of energy to preserve the cold energy of the transported liquefied gas, and realize the utilization of the cold energy of the cryogenic working fluid in other scenarios where cold energy is required.

[0061] In addition, the combination of two sets of liquid phase pipelines and gas phase pipelines can not affect the normal operation of other businesses of the liquefied gas receiving station when the main liquid phase pipeline 301 is unloading liquid. The spare liquid phase pipeline 303 and spare gas phase pipeline 304 can still be used for other loading and unloading operations.

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

[0063] In some embodiments, the combination Figure 1 The main liquid phase pipeline 301 is arranged at the center of the outer pipeline 306, and the main gas phase pipeline 302, the spare gas phase pipeline 304, the spare liquid phase pipeline 303 and the purge precooling pipeline 305 are respectively arranged outside the main liquid phase pipeline 301. Because the main liquid phase pipeline 301 transports liquid phase liquefied gas, the density of liquid phase liquefied gas is relatively large. In order to ensure the stability of the entire liquefied gas multi-channel transport device 300 during the transport process, the main liquid phase pipeline 301 can be arranged at the center of the outer pipeline 306, or the main liquid phase pipeline 301 can be arranged at a position slightly below the center of the outer pipeline 306.

[0064] There is a distance between the main liquid phase pipeline 301 and the main gas phase pipeline 302, the spare gas phase pipeline 304, the spare liquid phase pipeline 303 and the purge precooling pipeline 305 respectively to avoid contact between the sub-pipelines, energy transfer between different sub-pipelines (even if it occurs, it is only a small amount of heat transfer), and contact friction between the sub-pipelines to avoid damage to the outer surface of the sub-pipelines, thereby avoiding affecting the service life of the sub-pipelines.

[0065] In some embodiments, the inner pipe clamp 307 includes a plurality of inner pipe clamps, and the outer circumferential surfaces of the plurality of inner pipe clamps 307 are interference fit with the inner wall of the outer pipe 306 to ensure that the inner pipe clamp 307 does not slip in the outer pipe 306. The plurality of inner pipe clamps 307 are arranged at intervals in the outer pipe 306 to support the sub-pipes at different positions of the sub-pipes. Specifically, the inner pipe clamps 307 can be arranged at intervals according to the bearing load of the outer pipe 306 to ensure the stability of the sub-pipes in the outer pipe 306.

[0066] The inner pipe clamp 307 can be made of metal material or hard plastic plate, etc. As long as it can firmly support the sub-pipeline, the specific material is not specifically limited here.

[0067] In addition, combined Figure 2 The structure of the inner pipe clamp 307 can also be adaptively designed according to the arrangement of the sub-pipes in the outer pipe 306. For example, when the main liquid phase pipe 301 is arranged at the center of the outer pipe 306, a mounting hole corresponding to the main liquid phase pipe 301 can be arranged at the center of the inner pipe clamp 307, so that the main liquid phase pipe 301 can be installed in the outer pipe 306 through the mounting hole. At the same time, around the mounting hole of the inner pipe clamp 307, mounting holes corresponding to the main gas phase pipe 302, the spare liquid phase pipe 303, the spare gas phase pipe 304 and the purge precooling pipe 305 can be arranged.

[0068] In some embodiments, each sub-pipeline is provided with a plurality of external pipe ports, which are used to connect to external pipes or external devices. For example, the external pipe port can be connected to a storage tank of a liquefied gas receiving station through a connecting pipe. Or it can be connected to a loading pipe of a liquefied gas receiving station to load liquefied gas to the terminal device. The terminal device can be a liquid hydrogen tank truck.

[0069] The present application also provides a liquefied gas receiving station system, such as Figure 3 As shown, it includes a liquefied gas multi-channel conveying device 300 as described in any of the above embodiments and functional areas respectively connected to the liquefied gas multi-channel conveying device 300, the functional areas including 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 is taken as an example that the liquefied gas is liquid hydrogen.

[0070] The liquefied gas transport ship 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 transportation device 300 .

[0071] For example, taking the transport ship as a liquid hydrogen transport ship, it is an ocean transport ship equipped with liquid hydrogen storage tanks, equipped with hose interfaces required for loading and unloading liquid hydrogen. The liquefied gas unloading area 101 may have a liquid unloading arm hose connecting the liquid phase pipeline and the gas phase pipeline of the liquid hydrogen transport ship. The liquid hydrogen unloading area has an emergency discharge port and a purge pipeline interface, and the purge pipeline interface can be connected to the receiving station control center 200. The receiving station control center 200 is the control core of the entire station and the location of the receiving station PLC unit. Equipped with a low-temperature cold source, a vaporizer and a high-purity purge gas reservoir. In the purge replacement and precooling process, the liquid hydrogen unloading area pipeline and at least part of the sub-pipeline of the multi-channel conveying device 300 can be connected for purging and / or precooling in different areas.

[0072] The tank area 400 may include a plurality of first liquefied gas storage tanks, which may be independent of each other, and a valve group and a reducer are respectively provided on the connecting pipeline between each first liquefied gas storage tank and the sub-pipeline. The reducer can realize the connection between pipelines of different diameters. That is, the connecting pipeline can be connected to the external pipe port of the sub-pipeline.

[0073] The control center 200 of the receiving station is connected to the valve group, and controls the on and off of the valve group, thereby controlling the independent connection relationship between the multiple first liquefied gas storage tanks and the sub-pipelines. Continuing with the above embodiment, the valve group may include multiple control valves, and the control valve may be a switch valve. A control valve may be separately set on the connecting pipeline between each sub-pipeline and the first liquefied gas storage tank. For example, a switch valve is set on the connecting pipeline between the main liquid phase pipeline 301 and the first liquefied gas storage tank, a switch valve is set on the connecting pipeline between the standby liquid phase pipeline 303 and the first liquefied gas storage tank, a switch valve is set on the connecting pipeline between the main gas phase pipeline 302 and the first liquefied gas storage tank, a switch valve is set on the connecting pipeline between the standby gas phase pipeline 304 and the first liquefied gas storage tank, and a switch valve is set on the connecting pipeline between the purge cooling pipeline and the first liquefied gas storage tank. Each switch valve can be controlled separately to meet the different functional requirements of the receiving station system. That is, relying on the valve group on the connecting branch, the first liquefied gas storage tank can independently carry out the liquid hydrogen transfer process or static storage without interfering with each other.

[0074] The liquefied gas receiving station system can also include a venting torch 600. The venting torch 600 of the venting functional partition is connected to the venting main pipe of the receiving station, and the waste gas generated in the station is vented or burned here. The hydrogen gas reservoir is designed to allow hydrogen to be recycled for secondary use instead of being directly vented and consumed when the purity of hydrogen meets the use requirements. The multi-channel conveying device 300 brings together multiple interfaces such as the gas phase and liquid phase pipelines in the liquid hydrogen unloading area, and is integrated in a high vacuum insulated rigid pipe. The storage functional partition tank area 400, the loading functional partition gas hydrogen loading area, the liquid hydrogen loading area and the venting functional partition BOG venting torch 600 are connected, and these functional partitions are connected by arranging pipeline branches.

[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 is used to receive the 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 booster is connected to the vaporizer and pressurizes the gas-phase liquefied gas. The filling machine is connected to the booster to fill the pressurized gas-phase liquefied gas into the terminal equipment.

[0077] For example, in combination with the above-mentioned embodiments, the gas-phase liquefied gas loading area 500 is arranged with an independent small-scale low-temperature second liquefied gas storage tank to receive the liquid hydrogen from the multi-channel transportation device 300, and the liquid hydrogen is converted into hydrogen through a vaporizer, and the hydrogen is pressurized through a boosting device (a high-pressure liquid hydrogen pump or a hydrogen compressor), and finally the hydrogen is injected into a hydrogen pipe trailer or transported to a downstream terminal through a filling machine.

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

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

[0080] The liquefied gas unloading area also has a liquid discharge port 104 , and the liquid discharge arm 102 can also be connected to the liquid discharge 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 of the embodiments that can be implemented, taking the liquefied gas as liquid hydrogen as an example, the first liquefied gas storage tank of the tank area 400 includes a storage tank A 401, a storage tank B 402, and a storage tank C 403. At this time, the liquid hydrogen receiving station is receiving 100 liquid hydrogen transport ships to transfer liquid hydrogen to the storage tank A401 in the tank area 400. At this time, the liquid hydrogen transport ship 100 occupies the main liquid phase pipeline 301 and the main gas phase pipeline 302 of the multi-channel conveying device 300 for unloading; at the same time, the storage tank B 402 of the tank area 400 of the liquid hydrogen receiving station occupies 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 the liquid hydrogen tank truck in the liquid hydrogen loading area 501; at the same time, the storage tank C in the tank area 400 Since 403 is newly used, the gas in storage tank C needs to be replaced and the purity needs to be monitored. The high-purity purge gas is controlled by the receiving station control center 200 to enter the purge precooling pipeline 305, and enters the storage tank C 403 through the branch pipeline, completing the gas replacement of the storage tank C 403 and the supporting pipe valves.

[0082] Multiple embodiments of the present application are described in detail above, but the present application is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concept of the present application, and these variations and modifications should all fall within the scope of protection required by the present application.

Claims

1. A multi-channel liquefied gas delivery 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 comprises: Clamps for outer pipes, sub-pipes and inner pipes; The outer pipe has a vacuum-insulated accommodation space; The inner pipe clamp is arranged in the outer pipe, and the outer surface of the sub-pipe is provided with a heat insulating layer; the inner pipe clamp is used to support the sub-pipe so that the sub-pipe is suspended in the outer pipe; The sub-pipeline includes: A main liquid phase pipeline for conveying liquefied gas in liquid phase; A main gas phase pipeline for conveying liquefied gas in gas phase; a standby liquid phase pipeline, which is used to transport liquefied gas in liquid phase when the main liquid phase pipeline is in use; a spare gas phase pipeline, which is used to transport liquefied gas in gas phase when the main gas phase pipeline is in use; A purge and precooling pipeline, which is used to transport protective gas and / or purge gas to purge, replace gas or precool the target pipeline or target equipment; The main liquid phase pipeline and the backup liquid phase pipeline can be used simultaneously to simultaneously transport the liquid phase liquefied gas to different functional areas of the liquefied gas receiving station.

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 greater than the inner diameter of the standby liquid phase pipeline.

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

4. The liquefied gas multi-channel conveying device according to claim 1, characterized in that: The inner pipe clamps include a plurality of inner pipe clamps, the outer circumferential surfaces of the plurality of inner pipe clamps are interference fit with the inner wall of the outer pipe, and the plurality of inner pipe clamps are arranged in the outer pipe at intervals 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 arranged on the outer side of the outer pipe, and a protective layer is arranged on the outer side of the moisture-proof layer.

6. The liquefied gas multi-channel conveying device according to claim 1, characterized in that: Each of the sub-pipelines is provided with a plurality of external pipe ports, and the external pipe ports are used to be connected to an external pipeline or an external device.

7. A liquefied gas receiving station system, characterized in that: The invention comprises a liquefied gas multi-channel conveying device as claimed in any one of claims 1 to 6 and functional areas respectively connected to the liquefied gas multi-channel conveying device, wherein 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 transport ship 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 transportation device.

8. The liquefied gas receiving station system according to claim 7, characterized in that: The tank area includes a plurality of first liquefied gas storage tanks, and the connecting pipelines between the plurality of first liquefied gas storage tanks and the sub-pipelines are respectively provided with valve groups and reducer adapters; The control center of the receiving station is connected to the valve group and controls the on-off of the valve group, thereby controlling the independent connection relationship between the first liquefied gas storage tanks and the sub-pipelines.

9. The liquefied gas receiving station system according to claim 7, characterized in that: The gas phase liquefied gas loading area includes a second liquefied gas storage tank, a vaporizer, a pressurizing device and a filling machine; The second liquefied gas storage tank is used to receive the liquefied gas from the sub-pipeline; The vaporizer is connected to the second liquefied gas storage tank and converts the liquefied gas in the liquid phase from the second liquefied gas storage tank into the liquefied gas in the gas phase; The pressurizing device is connected to the vaporizer and pressurizes the liquefied gas in the gas phase; The filling machine is connected to the pressurizing 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, the gas return arm is connected to the gas phase pipeline of the liquefied gas transport ship, and the liquid discharge arm and the gas return arm are also respectively connected to the bypass pipeline of the liquefied gas unloading area; The liquefied gas unloading area also has a liquid discharge port for emergency discharge of liquefied gas from the liquefied gas unloading area and the liquefied gas transport ship.

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