Separator and method for separating crude oil

By using a supercritical carbon dioxide separator to utilize the difference in component solubility at low temperature, efficient separation of crude oil can be achieved, solving the problems of high carbon emissions and energy consumption caused by high-temperature separation, and improving the utilization rate of carbon dioxide and oil separation efficiency.

CN117946720BActive Publication Date: 2025-09-26CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202211337610.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-28
Publication Date
2025-09-26
Estimated Expiration
2042-10-28

AI Technical Summary

Technical Problem

Existing crude oil separation technology requires high-temperature operation, resulting in high carbon emissions and energy consumption, and low separation efficiency.

Method used

A supercritical carbon dioxide separator is used to separate the components in crude oil into a high-density oil-rich phase and a low-density carbon dioxide-rich phase by utilizing the differences in the solubility and distribution coefficient of carbon dioxide at low temperatures. The separation and precipitation of the components are achieved by using a decompression medium and support design.

Benefits of technology

Achieve efficient separation of crude oil at low temperatures, improve carbon dioxide utilization, reduce separation energy consumption, reduce carbon emissions, and improve oil separation efficiency.

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Abstract

The present invention relates to a separator and a method for separating crude oil. The separator comprises: a shell and a second support member having a gap with the wall of the separation chamber, a first support member sealed and connected to the shell being spaced apart above the second support member along the height direction of the separation chamber; the second support member is an impermeable support member, and an overflow plate is provided at one end of the gap, the overflow plate, the second support member and the wall of the separation chamber together form a second phase separation zone; each first support member comprises a permeable support portion and an impermeable support portion, an overflow plate is provided between the permeable support portion and the impermeable support portion, so that the overflow plate and the wall of the separation chamber together form a first phase separation zone, and a decompression medium is provided in the first phase separation zone and the second phase separation zone. The separator of the present invention can separate different components in crude oil using carbon dioxide at a relatively low temperature.
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