Liquefied hydrocarbon loading and unloading residual liquid recovery system and recovery method

Abstract

The invention relates to the field of hazardous chemical substance loading and unloading operation safety and discloses a liquefied hydrocarbon loading and unloading residual liquid recovery system and recovery method. The recovery system comprises an absorption device, a control device and a recovery device; the absorption device is connected with a pipeline between a crane pipe end ball valve and a tank car end ball valve; the control device is used for controlling opening and closing of an absorption unit when the monitored pressure of gasified hydrocarbon in the absorption unit reaches a certain preset value, so as to enable the gasified hydrocarbon to enter another absorption unit or enable the gasified hydrocarbon in the absorption unit to enter the recovery device; and the recoverydevice is used for recovering the gasified hydrocarbon in the absorption unit. According to the liquefied hydrocarbon loading and unloading residual liquid recovery system and the recovery method, theliquefied hydrocarbon residual liquid can be safely and effectively recovered in the loading and unloading operation process.

Description

technical field [0001] The invention relates to the safety field of loading and unloading hazardous chemicals, in particular to a recovery system and method for residual liquid in loading and unloading of liquefied hydrocarbons. Background technique [0002] As an important chemical raw material, liquefied hydrocarbons can be cracked to produce ethylene, propylene, and butene, and can also be used as fuel. The main mode of transportation is tanker trucks. When loading and unloading the liquefied hydrocarbon tanker, the loading and unloading crane pipe and the liquefied hydrocarbon transport tanker are connected together through the quick connection joint for loading and unloading operations. After the loading and unloading of liquefied hydrocarbons, close and open the ball valves at the crane pipe end and the tanker end. Since the delivery pressure of liquefied hydrocarbons is about 1.6 MPa, it is necessary to release the pressurized liquefied hydrocarbon medium between the ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a recovery system and method for the residual liquid of liquefied hydrocarbon loading and unloading in order to overcome the problem that the liquefied hydrocarbon residue between the crane pipe end and the ball valve at the tanker end is discharged on the spot when the existing quick joint is separated. It effectively solves the problem of on-site discharge of liquefied hydrocarbon residue between the crane pipe end and the ball valve at the tanker end when the quick joint is separated, and can realize safe and effective recovery of liquefied hydrocarbon residue during loading and unloading operations

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