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 treatment. If this part of the produced gas is not treated and discharged directly, it will bring about serious problems such as environmental protection and waste of resources.

Images