Long-distance mechanical power driven reciprocating immersed liquid hydrogen pump

Abstract

The invention discloses a long-distance mechanical power driven reciprocating immersed liquid hydrogen pump which is characterized by comprising the following components: an isolating part connected to a liquid hydrogen container, a pump main body cold end part and a power part, wherein the isolating part isolates a pump main body from the liquid hydrogen container fully, and the pump main body ismounted in the isolating part; the cold end part is used for receiving liquid hydrogen from the liquid hydrogen container and discharging the liquid hydrogen to a liquid hydrogen outlet pipe; and thepower part connected to the cold end part conveys a high pressure fluid to drive the cold end part to move in a reciprocating manner at a long distance by means of a mechanical power device, so thatliquid hydrogen discharge is achieved. A reciprocating pump structure which drives a cold end piston directly by a crank connecting rod to move in the reciprocating manner of a conventional motor is cancelled and the immersed liquid hydrogen reciprocating pump device which transfers power at a long distance by a high pressure fluid is used, so that the technical problem of a motor in an ultralow temperature environment and the technical problem of safety of a power mechanism of a motor in a flammable and combustible environment are solved effectively.

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

Its characteristic is that deep pre-cooling is required before starting the pump, and the preparation work is cumbersome and time-consuming, and BOG (a low-temperature liquid that is pressurized and liquefied below the critical temperature, is difficult to be absolutely insulated from the environment and evaporates after absorbing external heat. 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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