A device for discharging a two-phase layered liquid in a vessel operated on-line

Abstract

The invention discloses a device for discharging two-phase layered liquid from an on-line operation container. The device is provided with a first liquid level meter, a second liquid level meter, a first control valve and a second control valve; the first liquid level meter is positioned out of the container and communicates with the interior of the container; the second liquid level meter is positioned out of the container and communicates with the interior of the container; the first control valve is positioned out of the container, and communicates with the upper liquid of the two-phase layered liquid in the container through a pipeline which is directly connected with the wall of the container; the second control valve is positioned out of the container, and communicates with the lowerliquid of the two-phase layered liquid in the container through a pipeline; moreover, the first liquid level meter controls the first control valve to discharge the upper liquid from the container; the second liquid level meter controls the second control valve to discharge the lower liquid from the container. By utilizing the device disclosed by the invention, the two-phase layered liquid can bedischarged from the container safely and effectively.

Description

technical field [0001] The invention relates to the discharge of liquid in a container, in particular to a device for discharging two-phase stratified liquid in a container operated on-line. Background technique [0002] A tail gas separation device, which includes an amine liquid desulfurization tower, the tail gas from an oil refinery, also known as raw material gas, enters the amine liquid desulfurization tower from the bottom of the amine liquid desulfurization tower after being pressurized by a compressor, and is separated from the amine liquid desulfurization tower. The amine liquid from the top is in reverse contact, and the amine liquid reacts with the hydrogen sulfide in the raw material gas to achieve the purpose of removing hydrogen sulfide in the raw material gas. The raw material gas after hydrogen sulfide removal is discharged from the top of the tower and goes to the next process. The reacted amine liquid falls into the bottom of the tower and is discharged to...

AI Technical Summary

Problems solved by technology

As the oil hydrocarbons float on the surface of the amine liquid, as time accumulates, the oil hydrocarbon layer on the surface of the amine liquid becomes thicker and thicker, and the amine liquid is discharged through the bottom liquid level control valve, and the liquid level of the amine liquid becomes lower and lower. It is discharged through the liquid level control valve at the bottom of the tower and enters the low-pressure discharge pipeline, where it will be directly vaporized into a gaseous state, increasing the pressure in the low-pressure discharge pipeline. There is a risk of overpressure in the low-pressure pipeline and the subsequent low-pressure system, causing damage

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