A joint hydrogenation system of liquid hydrogen and high-pressure gas hydrogen based on injection mixed pressure

Abstract

The invention belongs to the technical field of hydrogenation at hydrogenation stations, and discloses a liquid hydrogen and high-pressure gas hydrogen combined hydrogenation system based on injection mixed pressure, including a high-pressure hydrogen storage tank (1), a liquid hydrogen tank (3), and a compressor (2), liquid hydrogen pump (4), heat exchanger (5) and ejector (6), the heat exchanger is used for heat exchange treatment to make high-pressure gaseous hydrogen release heat to obtain gaseous first hydrogen, and liquid hydrogen absorbs heat to obtain The gaseous second hydrogen gas; the injector is used to mix the first hydrogen gas and the second hydrogen gas to obtain mixed hydrogen gas. The present invention improves the composition of each component in the system and their cooperative working mode, obtains high-pressure hydrogen and low-pressure hydrogen respectively through heat exchange and precooling of high-pressure gas hydrogen and liquid hydrogen, and realizes the mixing of high-pressure hydrogen and low-pressure hydrogen through the injector. Pressure, while ensuring reliability, saves the traditional pre-cooling unit, reduces the pre-cooling equipment investment and operation and maintenance costs of hydrogen refueling stations, and is suitable for large-scale hydrogen refueling stations with combined storage of liquid hydrogen and gas hydrogen.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation at hydrogenation stations, and more specifically relates to a combined hydrogenation system of liquid hydrogen and high-pressure gas hydrogen based on injection mixed pressure, and also a hydrogenation system with pre-cooling suitable for fuel cell vehicles. The hydrogen system can be used in the hydrogen refueling process of the on-board hydrogen refueling station. Background technique [0002] The development of electric vehicles is an effective way to solve the environmental pollution of today's fuel vehicles. Hydrogen fuel cell vehicles are one of the strong competing options. Fuel cell vehicles are developing rapidly all over the world, and already have a certain industrial scale. The Society of Automotive Engineers' "Energy Saving and New Energy Vehicle Technology Roadmap" pointed out that by 2030, China's hydrogen fuel cell vehicles will exceed one million. Hydrogen refueling stati...

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Problems solved by technology

However, the article did not mention the temperature rise caused by the mixed pressure of the two streams. In fact, the mixed pressure of high-pressure hydrogen and low-pressure hydrogen will cause temperature rise, which will endanger the structural safety of vehicle-mounted gas cylinders.

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