Gas storage tank

A technology of gas storage tanks and gas pipes, which is applied in fixed-capacity gas storage tanks, gas processing/storage purposes, gas/liquid distribution and storage, etc., and can solve problems such as potential safety hazards, temperature rise, and complicated control of hydrogen storage systems. Achieve the effect of small footprint and large gas storage capacity

Active Publication Date: 2019-08-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this kind of composite hydrogen storage tank is that the hydrogen storage capacity is increased compared with the hollow tank, but it also brings the weakness of adsorption hydrogen storage, that is, the first storage tank must release heat in time when hydrogen is charged: if it is not removed in time, the temperature It will rise sharply, which poses a safety hazard; when using gas, it needs to be heated, and the adsorbed hydrogen will be released at a certain temperature, which will complicate the control of the hydrogen storage system
[0005] Among the above three hydrogen storage methods, high-pressure hydrogen storage tanks are promising due to their convenience in use, but the current hydrogen storage capacity is difficult to improve, and it relies heavily on the development of hydrogen storage tank materials

Method used

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Examples

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Embodiment 1

[0059] The prior art 70L vertical cylindrical hydrogen storage tank comprising only one layer of space can hold 1.75kg of hydrogen and 14.02kg of methane if its design pressure is 30MPa.

[0060] This embodiment provides a gas storage tank with a total volume of 70L and 3 layers of tank bodies. Among them, the design pressure of the three-layer tank is 30MPa. The volumes of the inner space 1, the middle space 2 and the outer space 3 of the gas storage tank account for 70%, 20% and 10% of the volume of the gas storage tank respectively, and the gas pressures in the three layers of space are 90MPa, 60MPa and 30MPa respectively . After calculation, the total hydrogen storage capacity of the gas storage tank can reach 4.56kg, and the storage capacity of methane is 36.44kg.

[0061] In addition, if three 70L, pressure-resistant 30MPa above-mentioned conventional cylindrical hydrogen storage tanks are used, although 5.25kg of hydrogen gas and 42.06kg of methane can be stored, the ...

Embodiment 2

[0063] The prior art 70L vertical cylindrical hydrogen storage tank comprising only one layer of space can hold 2.92kg of hydrogen and 23.37kg of methane if its design pressure is 50MPa.

[0064] This embodiment provides a gas storage tank with a total volume of 70L and 3 layers of tank bodies. Among them, the design pressure of the three-layer tank is 50MPa. The volumes of the inner space 1, the middle space 2 and the outer space 3 of the gas storage tank account for 70%, 20% and 10% of the volume of the 70L gas storage tank respectively, and the gas pressures stored in the three-layer spaces are 150MPa and 100MPa respectively and 50MPa. After calculation, the total hydrogen storage capacity of the gas storage tank can reach 7.59kg, and the storage capacity of methane is 60.73kg.

Embodiment 3

[0066] The prior art 70L vertical cylindrical hydrogen storage tank comprising only one floor space can hold 4.09kg of hydrogen and 32.72kg of methane if its design pressure is 70MPa.

[0067] This embodiment provides a gas storage tank with a total volume of 70L and 3 layers of tank bodies. Among them, the design pressure of the three-layer tank is 70MPa. The volumes of the inner space 1, the middle space 2 and the outer space 3 of the gas storage tank account for 70%, 20% and 10% of the volume of the gas storage tank respectively, and the gas pressures stored in the three layers of space are respectively 210MPa, 140MPa and 70MPa. After calculation, the total hydrogen storage capacity of the gas storage tank can reach 10.63kg, and the storage capacity of methane is 85.04kg.

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Abstract

The invention relates to the field of gas storage, and discloses a gas storage tank. The gas storage tank comprises n pressure resisting tanks which are sequentially sleeved from inside to outside, nis larger than or equal to two, the n pressure resisting tanks divide the interior of the gas storage tank into n layers of spaces, a gas inlet and outlet pipe with a valve is arranged on each pressure resisting tank, and gas can enter in or flow out of the spaces of the corresponding layers through the gas inlet and outlet pipes. The gas storage tank has the advantages of being small in occupyingspace and large in gas storage amount, the tank is applied to a new-energy car, and the car driving capacity is obviously improved.

Description

technical field [0001] The invention relates to the field of liquefied gas storage, in particular to a gas storage tank. Background technique [0002] Both hydrogen and methane are clean fuels, especially hydrogen, the product of combustion is water vapor, which is harmless to the environment. Hydrogen can be obtained from electrolysis of water, or from gasification of carbonaceous raw materials. The volumetric energy density of hydrogen is small, but the mass energy density is large. [0003] At present, there are three main methods for hydrogen storage: (1) low-temperature liquefaction hydrogen storage, which has a large storage capacity per unit volume container, but requires a low-temperature environment, and is very difficult to apply to hydrogen energy vehicles; (2) high-pressure hydrogen storage, this method There are higher standards and requirements for storage tank materials; at present, hydrogen storage tanks with a pressure resistance of 70MPa can be manufactur...

Claims

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Application Information

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IPC IPC(8): F17C1/00F17C13/00F17C13/04
CPCF17C1/005F17C13/002F17C13/04F17C2201/0166F17C2201/054F17C2203/0631F17C2205/0323F17C2221/012F17C2221/033F17C2223/0123F17C2223/035F17C2260/011F17C2270/0184Y02E60/32
Inventor 吴治国
Owner CHINA PETROLEUM & CHEM CORP
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