A high-pressure hydrogen storage and pipeline transportation safety system

Abstract

The invention discloses a high-pressure hydrogen storage and pipeline conveying safety system. The high-pressure hydrogen storage and pipeline conveying safety system comprises a high-pressure hydrogen conveying pipeline, a plurality of electric control stop valves connected to the high-pressure hydrogen conveying pipeline in series, reverse hydrogen flow sensors connected to the positions, at thetwo ends of each electric control stop valve, of the pipeline in parallel, and a pipeline breaking point signal collector arranged on the high-pressure hydrogen conveying pipeline, wherein a high-pressure hydrogen storage tank is connected with the high-pressure hydrogen conveying pipeline; a control system computer is connected with the reverse hydrogen flow sensors and the pipeline breaking point signal collector, and a user information receiving and processing calculation system is connected with the control system computer. According to the high-pressure hydrogen storage and pipeline conveying safety system, for accidents which are likely to occur and have large influences on high-pressure hydrogen pipeline conveying, accident information is collected and processed; and when major safety accidents such as pipeline breakage are caused by accidents, the electric control stop valves can be closed in time, continuous large-amount leakage of hydrogen is prevented, the situation of further development of the accident tense can be better controlled, and the safety of a pipeline system is improved.

Description

technical field [0001] The invention belongs to the application field of hydrogen energy. Specifically relates to a high-pressure hydrogen storage and pipeline transportation safety system. Background technique [0002] Today's wide application of fossil energy as the main form of consumption has promoted the rapid development of human society, but at the same time it has also caused irreversible impacts on the earth's environment in the form of global warming caused by CO2 emissions, making the transformation of low-carbon energy development a China needs to cope with new external challenges and internally develop industrial transformation and upgrading. [0003] Hydrogen energy has broad application prospects in energy, transportation, industry, construction and other fields, especially the transportation field represented by fuel cell vehicles is the breakthrough and main market for the initial application of hydrogen energy. Low-carbon hydrogen production from fossil e...

AI Technical Summary

Problems solved by technology

After decades of development, the safety problem of hydrogen energy application has been basically solved. However, in the application of large-scale hydrogen, the safety problem of hydrogen under some typical accident conditions is not enough. There is a gap in intrinsically safe technology, and it is especially necessary to solve low-probability safety accidents. (such as natural disasters, man-made accidents, etc.), because these problems may cause major casualties, loss of life and property, and serious adverse social impact

[0004] In terms of intrinsic safety of hydrogen storage in high-pressure, large-scale gas storage tanks, and hydrogen pipeline transportation systems, the main problems include: ① The hydrogen embrittlement of the metal materials used for high-pressure hydrogen transportation pipelines leads to the degradation of the mechanical properties of the materials

Due to the hydrogen embrittlement effect of metal materials under the action of hydrogen, their mechanical properties will have obvious adverse changes with the prolongation of service time, which will affect the safe containment capacity of high-pressure hydrogen

Accidents such as brittle fracture may be caused by the joint action of adverse environmental factors

②For some typical accident modes, accidents may lead to the rupture of high-pressure hydrogen storage tanks and high-pressure hydrogen delivery pipelines, resulting in a large and continuous release of hydrogen. Accidents such as hydrogen explosions may cause heavy casualties and property losses, and affect social stability

However, this kind of one-way valve cannot autonomously cut off the positive hydrogen flow, and cannot avoid the continuous leakage of the positive hydrogen flow under accident conditions, which may cause a large hydrogen explosion safety accident.

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