Skidded moving type carbon dioxide oil displacing production gas recovery system

Abstract

The invention discloses a skidded moving type carbon dioxide oil displacing production gas recovery system, which mainly consists of a carbon dioxide compression unit, a drying unit, a carbon dioxidecondensing liquidation unit, a stripping unit, a refrigeration unit and a tail gas liquidation separation unit. The units are sequentially connected to form a main material pipeline loop, an auxiliarymaterial pipeline loop and a dichlorodifluoromethane pipeline loop. The cold and hot flow energy among the three loop pipelines is reasonably exchanged; the raw material gas to be cooled is used as astripping tower heat source; the self body is cooled; the discharged tail gas is used for cooling raw material gas; the cold quantity is sufficiently utilized. Two kinds of coolants and the two kindsof work conditions including the standard work condition and the ultra-low-temperature work condition are reasonably used to achieve the complementary effects; the product quality is improved; the carbon dioxide and methane are sufficiently recovered. A small amount of carbon dioxide gas is discharged at the start-stop moment, the production device realizes the whole sealed circulation, no pollution and zero discharge.

Description

technical field [0001] The invention relates to the technical field of oil well output gas recovery, in particular to a skid-mounted mobile carbon dioxide flooding output gas recovery system. Background technique [0002] At home and abroad, there are four main methods for separating carbon dioxide: chemical solvent method, physical solvent method, membrane separation method and cryogenic fractionation method. Among them, the process of separating and recovering carbon dioxide by using rectification and low-temperature stripping coupling method is relatively simple, but in the prior art, this process requires the use of three-tower equipment, which is huge and only suitable for fixed installation, not suitable for smaller oil fields Oil flooding produced gas recovery application. For the gas produced by a single well or a group of small wells, it is difficult to centralize the treatment by building a pipeline network or a recovery device. If this part of the produced gas is...

AI Technical Summary

Problems solved by technology

For the gas produced by a single well or a group of small wells, it is difficult to use the construction of a pipeline network or a recovery device for centralized tre...

Images