Flashing liquid-separation integration device

Abstract

The invention provides a flashing liquid-separation integration device which comprises a tank body, wherein the tank body is divided into a flashing cavity and a liquid-separation cavity in a vertical direction through a sealing plug; an inlet of one end of the flashing cavity is communicated with a first liquid inlet through a pipeline, an upper gas outlet is formed in the upper part of the flashing cavity, an outlet of the lower part of the flashing cavity is communicated with a first liquid outlet through a pipeline, and a fifth manual ball valve is arranged on the pipeline; an outlet of the upper end of the liquid-separation cavity is communicated with a right gas outlet through a pipeline, an outlet of the lower part of the liquid-separation cavity is communicated with a second liquid outlet through a pipeline, an inlet of the upper part of the liquid-separation cavity is communicated with a gas inlet through a pipeline, and a one-way check valve is arranged between the gas inlet and the upper gas outlet. A flashing and empty liquid-separation combined device is provided, the investment is reduced, an occupied area is reduced, and the construction cycle is shortened. Automatic liquid drainage in normal running conditions and emergency liquid drainage in slug flow conditions of a gas gathering station can be realized, and the running reliability and stability of the station are increased.

Description

technical field [0001] The invention relates to a flash evaporation and liquid separation integrated device. Background technique [0002] In the natural gas stations in the oil and gas industry and petrochemical industry, in order to meet the production needs, the stations are often equipped with vent liquid separation tanks (hereinafter referred to as liquid separation tanks) with the functions of vent liquid separation and separate gas production hose flashing. Before the venting main pipe is connected to the flare, it must pass through the vent liquid separation tank to prevent the oil and water from being taken out of the flare when the raw material gas is vented, forming a "fire rain" and endangering the safety of the station; the separator, compressor, etc. in the station must also be removed. Produced water separated by other process equipment is flashed to reduce hydrocarbon gas (containing H 2 S and other acidic components) emissions to reduce environmental pollut...

AI Technical Summary

Problems solved by technology

[0004] In the actual production and operation process, due to the large amount of upstream liquid and its fluctuations, the liquid separation tank discharge process has a small diameter and the operating pressure is normal pressure, the above liquid separation tank system has the following problems during production and operation: One is that the liquid separation tank is an atmospheric pressure tank, which relies on gravity to flow in, and the drainage speed of the trap is slow. , Insufficient liquid storage capacity, causing the liquid volume of the liquid separation tank to exceed the set value

The second is that when the drain of the trap is not timely or blocked, it needs to be drained manually, so the station needs to be on duty all day long, and the operating cost is high; third, when the gas field is in normal production, the liquid volume is small, so the drain valve, manual ball valve If the caliber of the trap is small, when the venting operation is performed in the station or the amount of liquid coming from the upstream is large, the drainage capacity of the drain valve is insufficient, and the liquid volume in the liquid separation tank increases in a short time, which affects the effect of flash liquid separation, and also causes the raw material gas to transfer oil and water Bring out the torches, forming a "fire rain"

Fourth, when other process equipment such as the separator in the station is draining liquid, and at the same time, the pipeline is vented, the two working conditions are likely to affect each other, and "fire rain" is likely to occur

Images