A reciprocating submersible liquid hydrogen pump driven by long-distance mechanical power

Abstract

The invention discloses a reciprocating submersible liquid hydrogen pump driven by long-distance mechanical power, which is characterized in that the reciprocating submersible liquid hydrogen pump includes the following components: The main part of the pump is completely isolated from the liquid hydrogen container, and the pump main body is installed in the isolation part; the cold end of the pump main body is used to receive the liquid hydrogen from the liquid hydrogen container and discharge the liquid hydrogen to the liquid hydrogen container. The hydrogen outlet pipe; the power part connected to the cold end, the power part uses a mechanical power device to transport high-pressure fluid over a long distance to drive the cold end to reciprocate, so as to realize the discharge of liquid hydrogen. The invention cancels the reciprocating pump structure in which the traditional motor directly drives the cold-end piston to reciprocate through the crank-link mechanism, and replaces it with a submersible liquid hydrogen reciprocating pump device that transmits power over a long distance through high-pressure fluid, effectively solving the technical problem of the motor in an ultra-low temperature environment And safety technical issues of motor power mechanism in flammable and explosive environment.

Description

technical field [0001] The invention relates to the field of liquid hydrogen energy, in particular to a reciprocating submersible liquid hydrogen pump driven by long-distance mechanical power. Background technique [0002] Liquid hydrogen (LH2) is a high-energy, ultra-low temperature liquid clean fuel. Compared with gas hydrogen and metal hydrides, liquid hydrogen has incomparable advantages in terms of energy storage density and transportation costs, and has a broad development space. China has also issued a number of related policies to support the hydrogen energy industry. The liquid hydrogen pump used for liquid hydrogen transportation is one of the important equipment in the liquid hydrogen industry. [0003] At present, the unloading and transportation of liquid hydrogen basically adopts the pressurized extrusion method. The container design requirements are high, the output pressure is low, and the high-temperature pressurized gas may cause the risk of thermoacoustic...

AI Technical Summary

Problems solved by technology

It is characterized by the need for deep pre-cooling before starting the pump, the preparation work is tedious and time-consuming, and BOG (a low-temperature liquid after the gas is pressurized and liquefied below the critical temperature, because it is difficult to be absolutely insulated from the environment, it absorbs external heat and evaporates. Gas) loss is large, it will pollute the air and increase the cost

In LNG storage and transportation, there are also electric centrifugal pumps that are completely submerged in liquid, but because the temperature of liquid hydrogen (-253°C) is much lower than that of LNG (-169°C), the problem of motor submersion cannot be solved, so it needs to be solved urgently

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