CN217684438U - Conveying device for hydrogen liquefaction - Google Patents

Abstract

The utility model discloses a conveyor is used in hydrogen liquefaction, including hydrogen liquefaction structure, liquid hydrogen transport structure and hydrogen storage tank, liquid hydrogen transport structure includes liquid hydrogen pipeline, nitrogen pump and gaseous collecting box, liquid hydrogen pipeline one end communicates to hydrogen liquefaction structure, the liquid hydrogen pipeline other end communicates to the hydrogen storage tank, be provided with exhaust duct on the liquid hydrogen pipeline, be provided with the thermal insulation layer on the liquid hydrogen pipeline inner wall, be provided with nitrogen gas output pipeline on the nitrogen pump, nitrogen gas output pipeline communicates to liquid hydrogen pipeline, gaseous collecting box one side is provided with external pipeline, be provided with gaseous recovery pipeline on the gaseous collecting box, gaseous recovery pipeline communicates to liquid hydrogen pipeline, gaseous recovery pipeline is provided with the gas accuse valve with liquid hydrogen pipeline junction, the device is in liquid hydrogen transportation process, prevent that liquid hydrogen from being polluted by other gaseous impurities, great improvement the purity of liquid hydrogen, make the purity of hydrogen in the liquid hydrogen can reach more than 99 percent, the resource has been practiced thrift, the energy consumption has been reduced.

Description

Conveying device for hydrogen liquefaction

Technical Field

The utility model belongs to the technical field of hydrogen is carried, especially, relate to a conveyor is used in hydrogen liquefaction.

Background

With the development of industry and the improvement of living standard of people, the demand of energy is increasing day by day, because the use of fossil energy such as coal, petroleum and the like inevitably pollutes the environment, and in addition, the reserves are limited, people face the difficult challenge of developing efficient and clean secondary energy, so that the search of renewable green energy is urgent, and hydrogen is taken as an ideal energy carrier which can be obtained from various ways, is one of important bridges for the transition from fossil energy to renewable energy, and provides a new important form for the utilization of terminal energy.

The core of hydrogen liquefaction technique is the liquefaction part of hydrogen, the critical temperature and the conversion temperature of hydrogen are low, latent heat of vaporization is little, its theoretical minimum liquefaction work is the highest among all gases, hydrogen liquefaction back liquid hydrogen need carry the hydrogen storage tank or directly carry to the equipment in use, can receive the pollution of outside ambient air in the transportation process of liquid hydrogen, current liquid hydrogen conveyor can not effectually prevent air pollution, can cause the hydrogen content of liquid hydrogen to reduce, the purity reduces, can not clear up or collect the impurity gas in the pipeline simultaneously, the resource has been wasted, the energy consumption also improves thereupon. Effectively avoiding the liquid hydrogen from being polluted by the external environment in the filling process.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model provides a conveyor is used in hydrogen liquefaction, the device prevent that liquid hydrogen from being polluted by other gaseous impurities at liquid hydrogen transportation process, great improvement liquid hydrogen's purity, make in the liquid hydrogen the purity can reach ninety nine percent more than, practiced thrift the resource, reduced the energy consumption.

In order to achieve the above object, the utility model provides a following technical scheme: the conveying device for the hydrogen liquefaction comprises a hydrogen liquefaction structure, a liquid hydrogen conveying structure and a hydrogen storage tank, wherein the liquid hydrogen conveying structure comprises a liquid hydrogen conveying pipeline, a nitrogen pump and a gas collecting tank, one end of the liquid hydrogen conveying pipeline is communicated to the hydrogen liquefaction structure, a liquid hydrogen outlet valve is arranged at the joint of the liquid hydrogen conveying pipeline and the hydrogen liquefaction structure, the other end of the liquid hydrogen conveying pipeline is communicated to the hydrogen storage tank, a liquid hydrogen inlet valve is arranged at the joint of the liquid hydrogen conveying pipeline and the hydrogen storage tank, an exhaust pipeline is arranged on the liquid hydrogen conveying pipeline, an exhaust valve is arranged at the joint of the exhaust pipeline and the liquid hydrogen conveying pipeline, a heat insulation layer is arranged on the inner wall of the liquid hydrogen conveying pipeline, a nitrogen output pipeline is arranged on the nitrogen pump and communicated to the liquid hydrogen conveying pipeline, a nitrogen valve is arranged at the joint of the nitrogen output pipeline and the liquid hydrogen conveying pipeline, an external pipeline is arranged on one side of the gas collecting tank, a gas recovery pipeline is arranged on the gas collecting tank, the gas recovery pipeline is communicated to the liquid hydrogen conveying pipeline, and a gas control valve is arranged at the joint of the gas recovery pipeline and the liquid hydrogen conveying pipeline.

Furthermore, the heat-insulating layer comprises heat-resistant fiber cloth and a foaming ceramic block.

Furthermore, the external pipeline opening is a threaded pipe opening.

Compared with the prior art, the beneficial effects of the utility model are that: through being provided with nitrogen pump and exhaust duct, in discharging air or other impurity gas completely to the atmosphere in the hydrogen conveying pipeline, prevent that liquid hydrogen from being polluted by other gaseous impurity in transportation process, great improvement the purity of liquid hydrogen, make the hydrogen purity in the liquid hydrogen reach ninety nine above hundredth, through setting up gaseous collecting box and heat preservation insulating layer, guarantee the temperature of liquid hydrogen in the liquid hydrogen conveying pipeline, and further collect exhaust hydrogen or nitrogen gas in the conveying pipeline through gaseous collecting box, recycle, and the resource is saved, and the energy consumption is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the liquid hydrogen conveying structure of the present invention.

In the figure: the device comprises a hydrogen liquefying structure 1, a liquid hydrogen conveying structure 2, a hydrogen storage tank 3, a liquid hydrogen conveying pipeline 4, a nitrogen pump 5, a gas collecting box 6, a liquid hydrogen outlet valve 7, a liquid hydrogen inlet valve 8, an exhaust pipeline 9, an exhaust valve 10, a heat-insulating layer 11, a nitrogen output pipeline 12, a nitrogen valve 13, an external pipeline 14, a gas recovery pipeline 15 and a gas control valve 16.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The embodiment is as follows:

referring to fig. 1-2, a conveying device for hydrogen liquefaction comprises a hydrogen liquefaction structure 1, a liquid hydrogen conveying structure 2 and a hydrogen storage tank 3, wherein the liquid hydrogen conveying structure 2 comprises a liquid hydrogen conveying pipeline 4, a nitrogen pump 5 and a gas collecting tank 6, one end of the liquid hydrogen conveying pipeline 4 is communicated to the hydrogen liquefaction structure 1, a liquid hydrogen outlet valve 7 is arranged at the joint of the liquid hydrogen conveying pipeline 4 and the hydrogen liquefaction structure 1, the other end of the liquid hydrogen conveying pipeline 4 is communicated to the hydrogen storage tank 3, a liquid hydrogen inlet valve 8 is arranged at the joint of the liquid hydrogen conveying pipeline 4 and the hydrogen storage tank 3, an exhaust pipeline 9 is arranged on the liquid hydrogen conveying pipeline 4, an exhaust valve 10 is arranged at the joint of the exhaust pipeline 9 and the liquid hydrogen conveying pipeline 4, a heat insulation and heat insulation layer 11 is arranged on the inner wall of the liquid hydrogen conveying pipeline 4, a nitrogen output pipeline 12 is arranged on the nitrogen pump 5, the nitrogen output pipeline 12 is communicated to the liquid hydrogen conveying pipeline 4, a nitrogen valve 13 is arranged at the joint of the nitrogen output pipeline 12 and the liquid hydrogen conveying pipeline 4, an external gas collecting tank 14 is arranged on one side of the gas conveying pipeline 6, and a gas collecting tank 15 and a liquid hydrogen recovery pipeline 15 are arranged on the liquid hydrogen conveying pipeline 4.

Further, the heat-insulating layer 11 comprises heat-resistant fiber cloth and a foamed ceramic block.

Furthermore, the pipe orifice of the external pipeline 15 is a threaded pipe orifice.

When in use: the method comprises the steps that hydrogen is liquefied through a hydrogen liquefying structure 1, all control valves are in a closed state at the moment, an exhaust valve 10 at an exhaust pipeline 9 is opened, a nitrogen valve 13 is opened, a nitrogen pump 5 starts to work, nitrogen discharges air or other impurity gases remained in a liquid hydrogen conveying pipeline 4 to the atmosphere through the exhaust pipeline 9 through a nitrogen conveying pipeline 12, after the time lasts for about 3-5 minutes, the exhaust valve 10 at the exhaust pipeline 9 is closed, then the nitrogen valve 13 and the nitrogen pump 5 are closed, a pneumatic control valve 16 is opened, the nitrogen or other trace impurity gases remained in the liquid hydrogen conveying pipeline 4 are collected into a gas collecting box 6 and last for about 2 minutes, then a liquid hydrogen outlet valve 7 is opened, the liquid hydrogen after reaction is discharged into the liquid hydrogen conveying pipeline 4 and lasts for 2-3 minutes, all other gases in the liquid hydrogen conveying pipeline 4 are discharged into a gas collecting box 6, then the pneumatic control valve 16 is closed, a liquid hydrogen inlet valve 8 is opened, the liquid hydrogen after the hydrogen is liquefied is conveyed into a hydrogen storage tank 3, the conveying device is closed after the energy consumption of the liquid hydrogen conveying device, the purity of the liquid hydrogen can be improved, and the liquid hydrogen can be prevented from being polluted by other impurities in the liquid hydrogen conveying device, and the liquid hydrogen, so that the purity can be reduced by nine percent.

Having shown and described the basic principles and principal features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (3)

1. The utility model provides a conveyor is used in hydrogen liquefaction, includes hydrogen liquefaction structure (1), liquid hydrogen transport structure (2) and hydrogen storage tank (3), its characterized in that: the liquid hydrogen conveying structure (2) comprises a liquid hydrogen conveying pipeline (4), a nitrogen pump (5) and a gas collecting box (6), one end of the liquid hydrogen conveying pipeline (4) is communicated to the hydrogen liquefying structure (1), a liquid hydrogen outlet valve (7) is arranged at the joint of the liquid hydrogen conveying pipeline (4) and the hydrogen liquefying structure (1), the other end of the liquid hydrogen conveying pipeline (4) is communicated to the hydrogen storage tank (3), a liquid hydrogen inlet valve (8) is arranged at the joint of the liquid hydrogen conveying pipeline (4) and the hydrogen storage tank (3), an exhaust pipeline (9) is arranged on the liquid hydrogen conveying pipeline (4), an exhaust valve (10) is arranged at the joint of the exhaust pipeline (9) and the liquid hydrogen conveying pipeline (4), and a heat-insulating layer (11) is arranged on the inner wall of the liquid hydrogen conveying pipeline (4);

the nitrogen pump is characterized in that a nitrogen output pipeline (12) is arranged on the nitrogen pump (5), the nitrogen output pipeline (12) is communicated to the liquid hydrogen conveying pipeline (4), a nitrogen valve (13) is arranged at the joint of the nitrogen output pipeline (12) and the liquid hydrogen conveying pipeline (4), an external pipeline (14) is arranged on one side of the gas collecting box (6), a gas recovery pipeline (15) is arranged on the gas collecting box (6), the gas recovery pipeline (15) is communicated to the liquid hydrogen conveying pipeline (4), and a gas control valve (16) is arranged at the joint of the gas recovery pipeline (15) and the liquid hydrogen conveying pipeline (4).

2. The conveying device for hydrogen liquefaction according to claim 1, characterized in that: the heat insulation layer (11) comprises heat-resistant fiber cloth and a foaming ceramic block.

3. The conveying device for hydrogen liquefaction according to claim 1, characterized in that: the pipe orifice of the external pipeline (14) is a threaded pipe orifice.

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