Liquefied gas low-temperature liquid-state long-distance conveying pipeline

Abstract

The invention discloses a liquefied gas low-temperature liquid-state long-distance conveying pipeline. The liquefied gas low-temperature liquid-state long-distance conveying pipeline comprises an inner pipe and an outer pipe; the inner pipe is located in the outer pipe; a vacuum layer is arranged between the inner pipe and the outer pipe; the outer side of the outer pipe is covered with a heat insulation layer; the outer surface of the inner pipe is sleeved with a plurality of reinforcing rings; and the outer pipe comprises a plurality of tensile sections which are in the wave shape, the outersides of the two ends of the outer pipe are sleeved with sealing rings, heat exchange cavities are formed in the sealing rings, and evaporants are arranged in the heat exchange cavities. The liquefied gas low-temperature liquid-state long-distance conveying pipeline has the advantages that heat exchange between liquefied gas and the outside is reduced even stopped through the inner pipe, the heatinsulation layer, the outer pipe and the vacuum layer, the effect that the liquefied gas in the long-distance conveying pipeline can be kept in the low temperature state is ensured, liquid-state conveying of the liquefied gas can be completed through the long-distance conveying pipeline, and the long-distance liquefied gas conveying efficiency is improved; and the evaporants can be evaporated into gas by absorbing heat when the outside temperature is high, the influence of the high temperature on the sealing rings is reduced, leakage of the long-distance conveying pipeline is prevented, and long-distance liquid-state conveying of the liquefied gas is completed advantageously.

Description

Technical field [0001] The invention relates to the technical field of liquefied gas storage and transportation, in particular to a long-distance pipeline for low-temperature liquid transportation of liquefied gas. Background technique [0002] Liquefied petroleum gas, also known as liquefied petroleum gas, is one of the petroleum products. It is composed of a variety of low-boiling gases. The main components are butene, propylene, butane and propane. Liquefied petroleum gas is mainly used as a petrochemical raw material, used for hydrocarbon cracking to produce ethylene or steam reforming to produce synthesis gas, and can be used as industrial, civil, and internal combustion engine fuel. At present, the transportation of liquefied gas is mainly carried out in gaseous state, and high-efficiency liquid transportation is not used. One of the reasons is that pipeline transportation of liquid liquefied gas requires effective insulation outside the pipeline, because the temperature of...

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the shortcomings of the existing liquefied gas pipelines for transporting gaseous liquefied gas and low transport efficiency, and provides a long-distance pipeline for low-temperature liquid transportation of liquefied gas, which can maintain low temperature to keep liquefied gas liquefied, and improve long-distance liquefied gas transportation s efficiency

Images