Liquid nitrogen conveying pipeline capable of preventing water attacks

Abstract

A liquid nitrogen conveying pipeline capable of preventing water attacks comprises a liquid nitrogen tank self-pressurization and pressure-relief pipeline, a liquid nitrogen conveying pipeline, a liquid nitrogen atomizing device and a gas-liquid separation device, wherein the liquid nitrogen tank self-pressurization and pressure-relief pipeline controls pressure of a liquid nitrogen tank through self-pressurization to provide system back pressure for the liquid nitrogen conveying pipeline; the liquid nitrogen conveying pipeline establishes a passage between the liquid nitrogen tank and the liquid nitrogen atomizing device, and the flow of the pipeline is controlled and adjusted by the aid of stop valves and adjusting valves; the liquid nitrogen atomizing device produces various special atomizing effects; the gas-liquid separation device distinguishes gas and liquid phases in the liquid nitrogen conveying pipeline, and gaseous nitrogen in the pipeline is exhausted, so that single-phase liquid nitrogen is conveyed to the tail-end liquid nitrogen atomizing device. According to the liquid nitrogen conveying pipeline capable of preventing the water attacks, pressure stabilization, flow stabilization and attack prevention functions during separation of the gas and liquid phases are realized, influence of the water attacks and pipeline vibration are eliminated, and hazards to pipeline system safety are avoided.

Description

technical field [0001] The invention belongs to the technical field of low temperature applications, and in particular relates to a liquid nitrogen delivery pipeline for preventing water hammer. Background technique [0002] In the field of low-temperature stage special effects, liquid nitrogen is generally used as a special effect element to produce cloud and fog special effects. In order to ensure the special effects of clouds and fog, the medium supplied to the end stage special effects equipment is required to be single-phase liquid nitrogen, and gas-liquid two-phase flow is prohibited. Determine the position and quantity of the gas-liquid separator according to the layout of the liquid nitrogen pipeline, separate the gas-liquid two-phase in the medium of the liquid nitrogen pipeline, discharge the gaseous nitrogen in time, and ensure that the medium in the pipeline is single-phase liquid nitrogen. [0003] As an important equipment for gas-liquid two-phase separation, ...

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Problems solved by technology

[0004] In a low-temperature stage special effects project, when the gas-liquid separator is not pre-cooled for the first exhaust process, it is easy to cause low-temperature water hammer, resulting in large-scale vibration of the pipeline, which directly endangers the safety of the pipeline system

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