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A rectification-type self-cascading low-temperature condensation oil-gas separation system

A low-temperature condensation and separation system technology, applied in the direction of separation methods, steam condensation, chemical instruments and methods, etc., can solve the problems that are not applicable to the field of oil and gas separation, and the scope of application is limited

Active Publication Date: 2019-01-11
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the scope of application of this device is limited, and it is only suitable for occasions where the raw material gas needs to be completely liquefied; while in the occasion for dealing with oily air, it is only necessary to condense and liquefy the oil as much as possible, and the air does not need to be liquefied, so the The device is not suitable for the field of oil and gas separation

Method used

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  • A rectification-type self-cascading low-temperature condensation oil-gas separation system
  • A rectification-type self-cascading low-temperature condensation oil-gas separation system
  • A rectification-type self-cascading low-temperature condensation oil-gas separation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 As shown, a rectification-type self-cascading low-temperature condensation oil-gas separation system includes a compressor 1, a condenser 2, a rectification device 3, a first heat exchanger 4, a second heat exchanger 5, and a third heat exchanger 6. Evaporator 7, first separator 8, second separator 9, third separator 10, fourth separator 11, first throttling element 12, second throttling element 13, third throttling element 14 , the fourth throttle element 15 , the fifth throttle element 16 , the sixth throttle element 17 and the seventh throttle element 18 .

[0051] The rectification device 3 includes a rectification column and a column top heat exchanger connected to the top of the rectification column, and a cooling pipeline is arranged in the column top heat exchanger. The first heat exchanger 4, the second heat exchanger 5, and the third heat exchanger 6 are all provided with a forward flow refrigerant pipeline, a return flow refrigerant pipeline...

Embodiment 2

[0076] Such as figure 2 As shown, the connection mode and structure are the same as in Example 1, except that a dry filter 19 and a bottom heat exchanger 20 are provided at the liquid outlet at the bottom of the rectification device.

[0077] The bottom outlet of the rectifying device 3 is first connected with the drying filter 19 and the tank bottom heat exchanger 20 in sequence, and then connected with the three branches where the second throttling element 13, the third throttling element 14 and the fourth throttling element 15 are located. connected;

[0078] A high-pressure refrigerant pipeline and a low-pressure refrigerant pipeline are arranged in the tank bottom heat exchanger 19 . Specifically, the bottom liquid outlet 3b of the rectifying device 3 is connected with the inlet 19a of the drier filter 19, and the outlet 19b of the drier filter 19 is connected with the high-pressure refrigerant pipeline inlet 20a of the tank bottom heat exchanger 20; The high-pressure ...

Embodiment 3

[0081] Such as image 3 As shown, the connection method and structure are the same as in Embodiment 1, except that a third heat exchanger unit is newly added.

[0082] The third heat exchanger unit includes a fourth heat exchanger 22, a fifth heat exchanger 25, a first shut-off valve 21, a second shut-off valve 23, a third shut-off valve 24, a fourth shut-off valve 26, and a fifth shut-off valve 27 , the sixth shut-off valve 28, the seventh shut-off valve 29 and the eighth shut-off valve 30, the fourth heat exchanger 22 and the fifth heat exchanger 25 are arranged in parallel, wherein the first shut-off valve 21 is linked with the second shut-off valve 23, the second shut-off valve The third stop valve 24 is linked with the fourth stop valve 26 , the fifth stop valve 27 is linked with the sixth stop valve 28 , and the seventh stop valve 29 is linked with the eighth stop valve 30 .

[0083]Specifically, oil and gas are first connected with the inlet 21a of the first cut-off va...

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Abstract

The invention discloses a rectification type auto-cascade low temperature condensation oil-gas separation system which comprises a compressor, a condenser, a rectification device, a heat exchanger and an oil-gas condensation and separation loop, wherein the oil-gas condensation and separation loop comprises a first heat exchanger unit, a second heat exchanger unit, a first throttling element arranged between the first heat exchanger unit and the second heat exchanger unit, as well as a separator unit. According to the rectification type auto-cascade low temperature condensation oil-gas separation system disclosed by the invention, the rectification device replaces a multistage separation process in a conventional mixed refrigerant auto-cascade oil-gas separation system, and high pressure liquid refrigerants prepared from different components are respectively led out of the bottom and the top of the rectification device and respectively enter the first heat exchanger unit in a pressure reducing manner, so as to optimally match water equivalent changes of oil gas with different components in a cooling process; the rectification type auto-cascade low temperature condensation oil-gas separation system has the advantages of simple structure, reliable operation, high system efficiency and the like, and is particularly applicable to treatment of volatile oil gas in places such as an oil depot, a gas station and a petrochemical processing place.

Description

technical field [0001] The invention relates to the technical field of oil-gas separation, in particular to a rectification-type self-cascade low-temperature condensation oil-gas separation system. Background technique [0002] Some oil products stored in oil depots, gas stations, petrochemical processing and other places contain a large amount of volatile light hydrocarbon components, which are easy to volatilize and mix in the air during storage and transportation, causing oil loss, environmental pollution and safety hazards. So it is necessary to deal with the oily air in these places. The national standard GB20950-2007 "Emission Standard of Air Pollutants for Oil Storage Depot" and GB20952-2007 "Emission Standard of Air Pollutants for Gas Stations" and other specifications clearly stipulate that the total non-methane hydrocarbon content in the discharged oil and gas should not exceed 25g / cm 3 . [0003] In the field of oil-gas separation, the condensation method has at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D5/00
CPCB01D5/0051B01D5/0087
Inventor 宋琦王勤陈福胜韩晓红陈光明任彬徐象国
Owner ZHEJIANG UNIV
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