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Rectification type auto-cascade low-temperature condensation oil-gas separation system with cooling capacity recovery

A cold energy recovery and low-temperature condensation technology, which is applied in the direction of separation methods, steam condensation, chemical instruments and methods, etc., can solve problems such as limited scope of application and unsuitability for oil and gas separation, and achieve benefits to energy, comprehensive utilization, Realize the effect of cooling recovery

Active Publication Date: 2017-07-07
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
In the case of dealing with oily air, it is only necessary to condense and liquefy the oil as much as possible, but the air is not liquefied, so this device is not suitable for the field of oil and gas separation

Method used

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  • Rectification type auto-cascade low-temperature condensation oil-gas separation system with cooling capacity recovery
  • Rectification type auto-cascade low-temperature condensation oil-gas separation system with cooling capacity recovery
  • Rectification type auto-cascade low-temperature condensation oil-gas separation system with cooling capacity recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 1 As shown, a rectification-type self-cascade low-temperature condensation oil-gas separation system with cooling capacity recovery includes a compressor 1, a condenser 2, a rectification device 3, a first heat exchanger 4, a second heat exchanger 5, Third heat exchanger 6, evaporator 7, fourth heat exchanger 12, fifth heat exchanger 13, sixth heat exchanger 14, seventh heat exchanger 15, first separator 8, second separator 9 , the third separator 10, the fourth separator 11, the first throttle element 16, the second throttle element 17, the third throttle element 18, the fourth throttle element 19, the fifth throttle element 20, the sixth The throttle element 21 and the seventh throttle element 22 .

[0057] 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...

Embodiment 2

[0087] Such as figure 2 As shown, the connection mode and structure are the same as those in Example 1, except that a dry filter 23 and a tank bottom are provided between the liquid outlet 3b at the bottom of the rectifying device and the tank bottom liquid pipeline inlet 12a of the fourth heat exchanger 12. heat exchanger 24.

[0088] A high-pressure refrigerant pipeline and a low-pressure refrigerant pipeline are arranged in the tank bottom heat exchanger 24 . Specifically, the bottom liquid outlet 3b of the rectifying device 3 is connected to the inlet 23a of the drier filter 23, and the outlet 23b of the drier filter 23 is connected to the high-pressure refrigerant pipeline inlet 24a of the tank bottom heat exchanger 24; The high-pressure refrigerant pipeline outlet 24b of 24 is connected with the tank bottom liquid pipeline inlet 12a of the fourth heat exchanger 12; The inlet 24c is connected; the outlet 24d of the low-pressure refrigerant pipeline of the tank bottom h...

Embodiment 3

[0091] Such as image 3 As shown, the connection method and structure are the same as those in Embodiment 1, except that a fourth heat exchanger unit is newly added.

[0092] The fourth heat exchanger unit includes an eighth heat exchanger 26, a ninth heat exchanger 29, a first shut-off valve 25, a second shut-off valve 27, a third shut-off valve 28, a fourth shut-off valve 30, and a fifth shut-off valve 31 , the sixth shut-off valve 32, the seventh shut-off valve 33 and the eighth shut-off valve 34, the eighth heat exchanger 26 and the ninth heat exchanger 29 are arranged in parallel. Among them, the first stop valve 25 is linked with the second stop valve 27, the third stop valve 28 is linked with the fourth stop valve 30, the fifth stop valve 31 is linked with the sixth stop valve 32, and the seventh stop valve 33 is linked with the eighth stop valve. 34 linkage.

[0093] Specifically, the oil and gas are first connected with the inlet 25a of the first cut-off valve 25 an...

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Abstract

The invention discloses a rectification type auto-cascade low-temperature condensation oil-gas separation system with cooling capacity recovery. The system comprises a compressor, a condenser, a rectification device and an oil-gas condensation separation and cooling capacity recovery loop, wherein the oil-gas condensation separation and cooling capacity recovery loop comprises a first heat exchanger unit, a second heat exchanger unit, a third heat exchanger unit, a first restricting element and a separator unit. According to the system, the rectification device is adopted to replace multi-stage separation process of a conventional mixed working medium auto-cascade oil-gas separation system, meanwhile high-pressure liquid refrigerants of different components are respectively led out from the bottom and the top of the rectification device, condensed oil is precooled, is respectively depressurized, is fed into the first heat exchanger unit and is optimized to be matched with water equivalent weight variations of oil gases of different components in the cooling process. The system has the advantages of being simple in structure, reliable in operation, good in energy conservation and the like, and is particularly applicable to treatment on volatile oil gases in places such as oil depots, petrol stations and chemical treatment plants.

Description

technical field [0001] The invention relates to the technical field of oil-gas separation, in particular to a rectification-type self-cascading low-temperature condensing oil-gas separation system with cooling capacity recovery. 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 Depots" and GB20952-2007 "Emission Standards of Air Pollutants for Gas Stations" 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 metho...

Claims

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Application Information

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Patent Type & Authority Applications(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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