111 results about "Hydrogen compression" patented technology

The invention discloses a hydrogen injection method and system simultaneously suitable for 70Mpa and 35Mpa injection pressure. The hydrogen injection system comprises an in-station hydrogen productionunit, an outer hydrogen supply unit, a buffer tank, a low-pressure hydrogen compression unit, a low-pressure hydrogen storage unit, a high-pressure hydrogen compression unit, a high-pressure hydrogenstorage unit, a low-pressure hydrogen injection unit and a high-pressure hydrogen injection unit. The hydrogen injection method utilizes the hydrogen injection system for injecting hydrogen into a terminal user. According to the hydrogen injection method and system simultaneously suitable for 70Mpa and 35Mpa injection pressure, a hydrogen source can be obtained from in-station hydrogen productionand external hydrogen supply, not only the external hydrogen supply can be used for supplementation when an in-station hydrogen production device fails or becomes powerless, but also when the in-station hydrogen production capacity exceeds the self-consumed hydrogen amount of a hydrogen injection station, the hydrogen can be directly charged to a no-load long pipe trailer and sold externally; thecompression devices and hydrogen storage bottle groups with two different design pressure grades are arranged, so that the number of high-pressure hydrogen storage bottles can be reduced, the storagerisk can be reduced, in addition, the hydrogen injection under the two injection pressures in one hydrogen injection station can be realized, and the utilization rate of the hydrogen compression devices and the utilization rate of the hydrogen storage devices is improved.