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System and method for microwave-assisted supercritical CO2 extraction of crude oil in oil sands

A microwave-assisted, supercritical technology, applied in solid solvent extraction, petroleum industry, preparation of liquid hydrocarbon mixtures, etc., can solve problems such as inability to fully utilize technical advantages, secondary pollution, etc. Improve solubility and high-efficiency demulsification effect

Active Publication Date: 2016-04-13
XI AN JIAOTONG UNIV
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Problems solved by technology

Therefore, using supercritical CO 2 When extracting crude oil from oil sands, if no other measures are taken to improve the extraction efficiency of macromolecules, supercritical CO 2 The technical advantages of extraction cannot be brought into full play; in addition, the discharge of unextracted oil sands will cause secondary pollution

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  • System and method for microwave-assisted supercritical CO2 extraction of crude oil in oil sands

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the drawings and a specific embodiment:

[0024] Reference figure 1 , A microwave-assisted supercritical CO 2 The system for extracting crude oil from oil sands includes two extraction vessels 2, 4, two microwave generators 3, 5, a preheater 9, a separator 15, a gas purifier 16, a buffer tank 10, and an entrainer Agent storage tank 11 and so on.

[0025] The top inlets of the extraction kettles 2, 4 are connected to the belt conveyor 1 for conveying the oil sand OS through the valve 6, the bottom inlets of the extraction kettles 2, 4 are connected to the bottom outlet of the buffer tank 10 through the high pressure gas compressor 13, and the lower outlets of the extraction kettles 2, 4 Sand discharge port; an inlet of the buffer tank passes through the preheater 9, low pressure gas compressor 8 and CO 2 The storage tank 7 is connected, the other inlet of the buffer tank is connected to the e...

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Abstract

The invention discloses a microwave-assisted supercritical CO2 extraction system and a microwave-assisted supercritical CO2 extraction method for crude oil in oil sand. The system comprises at least two extraction kettles, a microwave generator, a separator, a gas purifier, a buffer tank, an entrainer storage tank and the like. The method comprises the following steps: conveying oil sand to each extraction kettle by virtue of a conveying device, meanwhile, feeding CO2 and the entrainer into the buffer tank, enabling the mixture in the buffer tank to enter the extraction kettle, and closing valves at the inlet and outlet ends of the extraction kettle; starting the microwave generator, staying for a period of time after the temperature in the kettle is up to the extraction temperature, opening the valve at the bottom of the kettle, discharging sand, opening the valve at the top outlet of the kettle, and enabling gas-phase fluid to enter the separator through a throttle valve; discharging crude oil from an outlet at the bottom of the separator, and returning the top gas to the buffer tank by virtue of the purifier. The system is provided with the at least two extraction kettles which can be alternately operated to realize continuous operation.

Description

Technical field [0001] The invention relates to an oil sand separation technology, in particular to a supercritical CO 2 System and method for extracting crude oil from oil sands. Background technique [0002] With the continuous increase in global oil demand, conventional oil resources can no longer meet the rapid growth of oil demand, and people have begun to turn their attention to unconventional oil resources. As the main source of unconventional petroleum resources, oil sands play a pivotal role in the world's energy supply. According to the research of the United States Geological Survey, the world's recoverable oil sands oil resources are about 103.51×10 9 m 3 , Accounting for about 32% of the world's total recoverable oil resources. At present, research and development of oil sands are accelerating all over the world. With the improvement of exploration and development technology, its share of global hydrocarbon energy will continue to increase. [0003] Oil sand mines ar...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/04B01D11/02B01J19/12
Inventor 王树众王玉珍李艳辉温胜钱黎黎任萌萌孙盼盼
Owner XI AN JIAOTONG UNIV
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