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Pressurizing multi-grade condensation type oil gas recycling method

A technology for oil and gas and heat recovery, applied in separation methods, multi-effect/segregation, chemical instruments and methods, etc., can solve the problem of high load

Active Publication Date: 2016-05-04
SOUTHEAST UNIV
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Problems solved by technology

On the other hand, in the existing pressurized condensation oil gas recovery process, the oil gas from the air compressor directly enters the cooling separator after exchanging heat with the exhaust gas. At this time, the oil gas temperature is still higher than 70°C and directly enters the cooling separator. Separators can cause their load to be too high

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  • Pressurizing multi-grade condensation type oil gas recycling method

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Such as figure 1 As shown in , the oil and gas from the air storage tank 1 are compressed to 0.5 MPa by the air compressor 2, and are connected to the input end of the oil and gas side of the first heat exchanger 3 through a pipeline, and the oil and gas come from the second heat exchanger 5 and are throttled. The tail gas throttled to normal pressure by the valve 10 is cooled to 95°C in the first heat exchanger 3, and the output end of the oil-gas side of the first heat exchanger 3 is connected to the input end of the oil-gas side of the air-cooled heat exchanger 4 through a pipeline, and the oil-gas side The temperature is lowered to 35° C. in the air-cooled heat exchanger 4 . The output end of the oil-gas side of the air-cooled heat exchanger 4 is divided into two paths through a pipeline, one path is connected to the oil-gas side input end of the second hea...

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Abstract

The invention discloses a pressurizing multi-grade condensation method for recycling oil gas. An air compressor is used for pressurizing the oil gas; cold quantity needed by each grade is provided for a pressurizing oil gas cooler through air cooling heat exchangers and a three-grade overlapping type refrigeration system. The pressurized oil gas passes through the air cooling heat exchangers and then is divided into two paths to be subjected to heat exchange with two heat exchangers which are arranged in parallel to recycle the cold quantity in liquid-state oil and tail gas respectively; then the oil gas sequentially passes through cooling heat exchangers of 2 DEG C, -30 DEG C and -80 DEG C, and the liquid-state oil and the tail gas are condensed and separated grade by grade. The tail gas is throttled to normal pressure before being exhausted to an atmospheric layer, and is subjected to heat exchange with the oil gas from the cooling heat exchangers to recycle the cold quantity again. The method disclosed by the invention has the three advantages that the water removing rate and the oil gas recycling rate can be easily improved after pressure is improved; the two parallel heat exchangers can be used for improving a heat transferring temperature difference and the cold quantity in the liquid-state oil and the tail gas is recycled to the greatest extent; the air cooling heat exchangers also can be used as overlapped refrigerating cycle condensers, so that a refrigerating system is relatively compact and efficient.

Description

technical field [0001] The invention relates to the field of oil and gas recovery, in particular to a pressurized multi-stage condensation recovery method for recovering volatile oil and gas mixtures. Background technique [0002] With the rapid development of China's economy, oil consumption is increasing year by year. Petroleum and its products are a mixture of various hydrocarbons, of which the light hydrocarbon components are highly volatile. During the entire process of oil exploitation, refining, storage, transportation, sales and application, due to the Due to the limitations of technology and equipment, some oil and gas will inevitably be volatilized and discharged into the atmosphere, which not only causes serious oil evaporation loss, but also brings safety hazards and environmental pollution. [0003] Problems such as waste of resources, environmental pollution, and potential safety hazards caused by direct oil and gas emissions have drawn increasing attention. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D5/00C10G5/06
CPCB01D5/0003B01D5/0036B01D5/0054B01D5/0087C10G5/06Y02P70/10
Inventor 鲁洁明杜垲
Owner SOUTHEAST UNIV
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