Liquid hydrogen transfer injection loading device and method

Abstract

The invention relates to the technical field of liquid hydrogen transfer injection loading, and discloses a liquid hydrogen transfer injection loading device and method.The device comprises a liquid hydrogen storage tank, a liquid hydrogen booster pump, a liquid hydrogen filling head, a loading skid and a liquid hydrogen tank lorry, the liquid hydrogen filling head is arranged on the loading skid, and a liquid hydrogen filling opening is formed in the liquid hydrogen tank lorry; and the liquid hydrogen storage tank, the liquid hydrogen booster pump, the liquid hydrogen filling head and a liquid hydrogen filling port of the liquid hydrogen tank car are communicated in sequence. The problem that liquid hydrogen loading is difficult to achieve in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid hydrogen transfer and loading, and in particular to a device and method for liquid hydrogen transfer and loading. Background Art

[0002] At present, the application of hydrogen energy in my country is mainly high-pressure gaseous hydrogen storage. Compared with high-pressure gaseous hydrogen storage and transportation, cryogenic liquid hydrogen has the advantages of high hydrogen storage density, low transportation cost, high gasification purity, low storage and transportation pressure, and high safety of use, which can effectively control costs. Therefore, with the rapid development of the hydrogen energy terminal industry, it will inevitably promote the growth of demand for liquid hydrogen, and liquid hydrogen storage and transportation will become one of the important means of hydrogen energy transportation.

[0003] The storage and transportation of liquid hydrogen can be divided into two categories, namely, pipeline transportation and container storage and transportation. Since liquid hydrogen has the characteristics of low boiling point (-253℃), small latent heat of vaporization, easy evaporation, and explosiveness, and large-scale liquid hydrogen production technology and liquid hydrogen production related equipment are not mature in China, my country's current hydrogen refueling stations are mainly high-pressure hydrogen storage and hydrogen refueling stations, which are difficult to meet the existing needs of liquid hydrogen loading (there are problems such as difficulty in realizing liquid hydrogen loading, difficulty in adjusting liquid hydrogen flow, and poor loading flexibility). Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a device and method for transferring and loading liquid hydrogen onto a vehicle, which solves the problems existing in the prior art such as difficulty in loading liquid hydrogen onto a vehicle.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] A device for transferring and loading liquid hydrogen, comprising a liquid hydrogen storage tank, a liquid hydrogen booster pump, a liquid hydrogen filling head, a loading skid, and a liquid hydrogen tank truck, wherein the liquid hydrogen filling head is arranged on the loading skid, the liquid hydrogen tank truck is provided with a liquid hydrogen filling port, and the liquid hydrogen storage tank, the liquid hydrogen booster pump, the liquid hydrogen filling head, and the liquid hydrogen filling port of the liquid hydrogen tank truck are connected in sequence.

[0007] As a preferred technical solution, it also includes a reflux regulating valve, one end of which is connected to the liquid hydrogen storage tank, and the other end of the reflux regulating valve is connected to the connecting pipeline between the liquid hydrogen booster pump and the liquid hydrogen filling head.

[0008] As a preferred technical solution, a liquid hydrogen flow meter is also provided on the loading skid, and the liquid hydrogen flow meter is arranged on the connecting pipeline between the liquid hydrogen booster pump and the liquid hydrogen filling head.

[0009] As a preferred technical solution, it also includes a self-pressurizing bypass valve, the node between the liquid hydrogen storage tank and the liquid hydrogen booster pump is connected to one end of the self-pressurizing bypass valve, and the node between the liquid hydrogen booster pump and the loading skid is connected to the other end of the self-pressurizing bypass valve.

[0010] As a preferred technical solution, it also includes a self-pressurizing vaporizer, and the liquid hydrogen storage tank is connected to the self-pressurizing vaporizer.

[0011] As a preferred technical solution, it also includes a gas phase return header, a main gasifier, a heater, and a hydrogen compressor. The liquid hydrogen tank truck is provided with a gas phase port, and the gas phase port of the liquid hydrogen tank truck, the gas phase return header, the main gasifier, the heater, and the hydrogen compressor are connected in sequence.

[0012] As a preferred technical solution, the main vaporizer is an air-temperature vaporizer, and the heater is a water bath heater.

[0013] As a preferred technical solution, it also includes a nitrogen system and a nitrogen purge valve, one end of the nitrogen purge valve is connected to the nitrogen system, and the node between the liquid hydrogen booster pump and the loading skid is connected to the other end of the nitrogen purge valve.

[0014] As a preferred technical solution, it also includes a hydrogen system and a hydrogen purge valve, one end of the hydrogen purge valve is connected to the hydrogen system, and the node between the liquid hydrogen booster pump and the loading skid is connected to the other end of the hydrogen purge valve.

[0015] A method for transferring and loading liquid hydrogen, using the device for transferring and loading liquid hydrogen. When in use, liquid hydrogen sequentially enters a liquid hydrogen storage tank and a liquid hydrogen booster pump, and enters a loading skid after being pressurized by the liquid hydrogen booster pump. The liquid hydrogen filling head on the loading skid is docked with the filling port of a liquid hydrogen tank truck to fill liquid hydrogen.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present invention forms a process for loading liquid hydrogen, which can realize quantitative loading of liquid hydrogen; two loading means are provided, namely, a liquid hydrogen self-pressurizing gasifier and a liquid hydrogen booster pump; the reflux regulating valve can adjust the flow of the reflux pipeline according to the flow detected by the liquid hydrogen flow meter, thereby adjusting the flow of liquid hydrogen in the loading skid, and can adapt to the loading of liquid hydrogen tank trucks in different situations;

[0018] (2) Compared with conventional low-temperature loading (such as LNG loading), the gas phase BOG is pressurized and enters the next process without returning to the liquid hydrogen storage tank; the liquid hydrogen pump is placed outside the pump pool instead of inside the liquid hydrogen storage tank; a hydrogen purge process is added, thereby improving the flexibility and practicality of the loading system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of a device for transferring and loading liquid hydrogen into a vehicle.

[0020] Marks and their corresponding names in the attached drawings: 1. Liquid hydrogen storage tank, 2. Self-pressurizing vaporizer, 3. Liquid hydrogen booster pump, 4. Reflux regulating valve, 5. Liquid hydrogen flow meter, 6. Liquid hydrogen filling head, 7. Gas phase return head, 8. Loading skid, 9. Liquid hydrogen tank truck, 10. Main line vaporizer, 11. Heater, 12. Hydrogen compressor, 13. Self-pressurizing bypass valve, 14. Nitrogen purge valve, 15. Hydrogen purge valve, 16. Liquid hydrogen hose. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0022] Example 1

[0023] like Figure 1 As shown, the present invention discloses a device and method for liquid hydrogen transfer and loading, a liquid hydrogen storage tank, which stores liquid hydrogen, a liquid hydrogen booster pump, a self-pressurizing vaporizer, a reflux regulating valve, a loading skid, including a liquid hydrogen flow meter, a liquid hydrogen filling head and a gas phase return head, a liquid hydrogen tank truck, an air-temperature vaporizer, a water bath heater, a hydrogen compressor, a self-pressurizing bypass valve, a nitrogen purge valve, a hydrogen purge valve, and a liquid hydrogen hose. The device and method for liquid hydrogen loading can fill the gap in the current liquid hydrogen loading related technology, can load a fixed liquid hydrogen container, and realize the loading of liquid hydrogen by two means of self-pressurization or a liquid hydrogen booster pump, and can control the loading amount by a reflux regulating valve to meet the loading requirements under different flow conditions. At the same time, the BOG gas phase returns to the next process through re-warming and pressurization to meet the needs of various situations of liquid hydrogen loading.

[0024] It includes a liquid hydrogen storage tank 1 (liquid hydrogen is stored inside), a liquid hydrogen booster pump 3, a self-pressurizing vaporizer 2, a reflux regulating valve 4, a loading skid 8, including a liquid hydrogen flowmeter 5, a liquid hydrogen filling head 6 and a gas phase return head 7, a liquid hydrogen tank truck 9, a main line vaporizer 10 (preferably an air-temperature vaporizer, which has the advantages of high efficiency, energy saving and environmental protection), a heater 11 (preferably a water bath heater, which has the advantages of uniform heating and easy temperature control), a hydrogen compressor 12, a self-pressurizing bypass valve 13, a nitrogen purge valve 14, a hydrogen purge valve 15, and a liquid hydrogen hose 16 (preferably a vacuum insulated hose, which has the advantage of low heat leakage rate).

[0025] Preferably, the outlet of the liquid hydrogen storage tank 1 is connected to the liquid hydrogen booster pump 3 through a liquid outlet pipeline, and the outlet of the liquid hydrogen booster pump 3 is connected to the loading skid 8 through one end of the liquid outlet pipeline, and connected to the liquid hydrogen storage tank 1 through a reflux pipeline at the other end; the reflux regulating valve 4 is arranged on the reflux pipeline to adjust the flow of the reflux pipeline.

[0026] Preferably, the liquid hydrogen flowmeter 5 is arranged on the loading skid 8, the liquid hydrogen filling head 6 and the gas phase return head 7 are arranged on the loading skid 8, and are arranged on the liquid outlet pipeline and the external transmission boosting pipeline respectively, and the gas phase return head 7 is connected to the main road vaporizer 10 through the external transmission boosting pipeline; the outlet of the main road vaporizer 10 is connected to the heater 11 through a pipeline, and the outlet of the water bath heater is connected to the hydrogen compressor 12 through the external transmission boosting pipeline. The liquid hydrogen hose 16 is arranged on the loading skid 8, located before the liquid hydrogen filling head 6, and is used to cooperate with the liquid phase port of the liquid hydrogen tank truck 9.

[0027] Preferably, one end of the self-pressurizing bypass valve 13 is connected to the liquid outlet pipeline at the bottom of the liquid hydrogen storage tank 1 , and the other end is connected to the liquid outlet pipeline at the outlet of the liquid hydrogen booster pump 3 .

[0028] Preferably, one end of the nitrogen purge valve 14 is connected to the nitrogen system, and the other end is connected to the liquid outlet pipeline of the liquid hydrogen booster pump 3 .

[0029] Preferably, one end of the hydrogen purge valve 15 is connected to the hydrogen system, and the other end is connected to the liquid outlet pipeline of the outlet of the liquid hydrogen booster pump 3 .

[0030] Example 2

[0031] like Figure 1 As shown, as a further optimization of Example 1, based on Example 1, this embodiment also includes the following technical features:

[0032] Based on the above-mentioned device for transferring and filling liquid hydrogen into a vehicle, the present invention further provides a method for transferring and filling liquid hydrogen into a vehicle, and the method is specifically as follows:

[0033] The first step is to open the nitrogen purge valve 14, purge the liquid outlet pipeline and the external transmission booster pipeline with nitrogen (20-60°C, 50Kpa.g-300Kpa.g), and then close the nitrogen purge valve 14.

[0034] The second step is to open the hydrogen purge valve 15, purge the liquid outlet pipeline and the external transmission booster pipeline with hydrogen (20-60°C, 200Kpa.g-300Kpa.g), and then close the hydrogen purge valve 15.

[0035] In the third step, the liquid hydrogen (-243~-253℃, 40Kpa.g~760Kpa.g) produced by the hydrogen liquefaction device enters the liquid hydrogen storage tank 1 through the pipeline. The liquid hydrogen in the liquid hydrogen storage tank 1 is transported to the liquid hydrogen booster pump 3 through the liquid outlet pipeline, and is pressurized to 130Kpa.g~850Kpa.g by the liquid hydrogen booster pump 3, and then enters the loading skid 8.

[0036] In addition, the outlet of the liquid hydrogen booster pump 3 returns to the liquid hydrogen storage tank 1 through the reflux pipeline, and a reflux regulating valve 4 is provided to adjust the flow of the reflux pipeline. The opening of the reflux regulating valve 4 is adjusted according to the flow signal fed back by the liquid hydrogen flow meter 5 on the loading skid 8.

[0037] In the fourth step, the liquid hydrogen filling head 6 and the gas phase return head 7 of the loading skid 8 are connected to the liquid phase port and the gas phase port of the liquid hydrogen tank truck 9 respectively to fill the liquid hydrogen. The generated liquid hydrogen BOG enters the main gasifier 10 through the external transmission booster pipeline for gasification (-5°C), enters the heater 11 to restore the hydrogen to room temperature, enters the hydrogen compressor 12 for pressurization, and is then transported to the next process.

[0038] Step 5: After the filling is completed, open the hydrogen purge valve 15 to purge the liquid outlet pipeline and the external transmission booster pipeline with hydrogen. After the purge is completed, disconnect the liquid hydrogen filling head and the gas phase return head.

[0039] Preferably, in the third step of the method, without starting the liquid hydrogen booster pump, the liquid hydrogen at the outlet of the liquid hydrogen storage tank enters the self-pressurizing vaporizer through the self-pressurizing pipeline, and returns to the liquid hydrogen storage tank through the self-pressurizing pipeline after gasification, thereby self-pressurizing the storage tank.

[0040] As described above, the present invention can be preferably implemented.

[0041] All features disclosed in all embodiments in this specification, or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be combined and / or expanded or replaced in any manner.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A device for transferring and loading liquid hydrogen into a vehicle. It is characterized in that The invention comprises a liquid hydrogen storage tank (1), a liquid hydrogen booster pump (3), a liquid hydrogen filling head (6), a loading skid (8), and a liquid hydrogen tank truck (9); the liquid hydrogen filling head (6) is arranged on the loading skid (8), the liquid hydrogen tank truck (9) is provided with a liquid hydrogen filling port, and the liquid hydrogen storage tank (1), the liquid hydrogen booster pump (3), the liquid hydrogen filling head (6), and the liquid hydrogen filling port of the liquid hydrogen tank truck (9) are connected in sequence.

2. A liquid hydrogen transfer and loading device according to claim 1, It is characterized in that It also includes a reflux regulating valve (4), one end of which is connected to the liquid hydrogen storage tank (1), and the other end of which is connected to a connecting pipeline between the liquid hydrogen booster pump (3) and the liquid hydrogen filling head (6).

3. A liquid hydrogen transfer and loading device according to claim 1, It is characterized in that A liquid hydrogen flow meter (5) is also provided on the loading skid (8), and the liquid hydrogen flow meter (5) is arranged on the connecting pipeline between the liquid hydrogen booster pump (3) and the liquid hydrogen filling head (6).

4. A liquid hydrogen transfer and loading device according to claim 3, It is characterized in that It also includes a self-pressurizing bypass valve (13), wherein a node between the liquid hydrogen storage tank (1) and the liquid hydrogen booster pump (3) is connected to one end of the self-pressurizing bypass valve (13), and a node between the liquid hydrogen booster pump (3) and the loading skid (8) is connected to the other end of the self-pressurizing bypass valve (13).

5. The device for transferring and loading liquid hydrogen into a vehicle according to claim 1, It is characterized in that It also includes a self-pressurizing gasifier (2), and the liquid hydrogen storage tank (1) is connected to the self-pressurizing gasifier (2).

6. A liquid hydrogen transfer and loading device according to claim 5, It is characterized in that It also includes a gas phase return head (7), a main gasifier (10), a heater (11), and a hydrogen compressor (12). The liquid hydrogen tank truck (9) is provided with a gas phase port, and the gas phase port of the liquid hydrogen tank truck (9), the gas phase return head (7), the main gasifier (10), the heater (11), and the hydrogen compressor (12) are connected in sequence.

7. A liquid hydrogen transfer and loading device according to claim 6, It is characterized in that The main gasifier (10) is an air-temperature gasifier, and the heater (11) is a water bath heater.

8. The device for transferring and loading liquid hydrogen into a vehicle according to claim 3, It is characterized in that It also includes a nitrogen system and a nitrogen purge valve (14), one end of the nitrogen purge valve (14) is connected to the nitrogen system, and the node between the liquid hydrogen booster pump (3) and the loading skid (8) is connected to the other end of the nitrogen purge valve (14).

9. The device for transferring and loading liquid hydrogen into a vehicle according to claim 3, It is characterized in that It also includes a hydrogen system and a hydrogen purge valve (15), one end of the hydrogen purge valve (15) is connected to the hydrogen system, and the node between the liquid hydrogen booster pump (3) and the loading skid (8) is connected to the other end of the hydrogen purge valve (15).

10. A method for transferring and loading liquid hydrogen into a vehicle. It is characterized in that A liquid hydrogen transfer and loading device as claimed in any one of claims 1 to 9 is used. When in use, liquid hydrogen sequentially enters the liquid hydrogen storage tank (1) and the liquid hydrogen booster pump (3), and enters the loading skid (8) after being pressurized by the liquid hydrogen booster pump (3). The liquid hydrogen filling head (6) on the loading skid is connected to the liquid hydrogen filling port of the liquid hydrogen tank truck (9) to carry out liquid hydrogen filling.

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