Reciprocating submerged type liquid hydrogen pump

Abstract

The invention discloses a reciprocating submerged type liquid hydrogen pump. The reciprocating submerged type liquid hydrogen pump is characterized in that, the reciprocating submerged type liquid hydrogen pump comprises the following components: a separation part, a pump body cold end part, and a power part; the separation part is connected with a liquid hydrogen container, and completely separates a pump body and the liquid hydrogen container; the pump body is installed in the separation part; the cold end part is used for receiving liquid hydrogen from the liquid hydrogen container and discharges the liquid hydrogen to a liquid hydrogen outlet pipe; and the power part is connected with the cold end part and adopts high-pressure liquid to drive the cold end part to make reciprocating motion so discharging of the liquid hydrogen is realized. According to the reciprocating submerged type liquid hydrogen pump, a reciprocating pump structure where a motor directly drives a cold end piston to make reciprocating motion via a crank-connecting rod mechanism in a traditional arrangement is cancelled; alternatively, the high-pressure liquid transmits power from a long distance, i.e. the power is supplied to a room-temperature assembly via a high-pressure liquid power source, and the high-pressure liquid power source drives a room-temperature piston to make reciprocating motion up and down and at the same time mobilizes the cold end piston to make reciprocating motion; and the operation process is safer and faster compared to a motor structure of a crank connecting rod.

Description

technical field [0001] The invention relates to the field of liquid hydrogen energy, in particular to a reciprocating submersible liquid hydrogen pump. 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 vibration. [0004] In general reciproc...

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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