A device and method for high-pressure desulfurization and separation of oil and gas

A gas-liquid separation tank, oil and gas technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of large heat load of reboiler at the bottom of the tower, increased investment and energy consumption, long process flow, etc. Achieve the effect of reducing energy consumption, small equipment volume and good desulfurization effect

Active Publication Date: 2022-04-12
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) The absorption and stabilization system uses stable gasoline as an absorbent to recover liquefied gas components. Due to the high yield of liquefied gas components in the catalytic cracking process, gasoline is Gasoline absorbing tower, ethane deabsorbing tower and stabilizing tower are circulated, and the circulation volume is large, the temperature at the bottom of ethane desorbing tower and stabilizing tower is high, the heat load of reboiler at the bottom of the tower is relatively large, and the energy consumption is low high
[0006] (3) The entire technological process is relatively long, which increases investment and energy consumption accordingly
[0007] (4) The existing process desulfurizes and sweetens the dry gas and liquefied gas after absorption and stabilization, H 2 S and mercaptans circulate in the entire absorption stabilization system, which may cause related corrosion problems, and there is H in the entire absorption stabilization system. 2 Possible security issues caused by S leakage

Method used

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  • A device and method for high-pressure desulfurization and separation of oil and gas
  • A device and method for high-pressure desulfurization and separation of oil and gas
  • A device and method for high-pressure desulfurization and separation of oil and gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Equipment for high-pressure desulfurization and separation of oil and gas:

[0083] Oil and gas feed pipeline, gas-liquid separation tank I 1, compressor I first stage 2, compressor I second stage 3, debutanizer tower 4, compressor II 5, cooler I6, gas-liquid separation tank II7, rich gas desulfurization tower 8. Gas-rich alkali washing tower 9, liquid hydrocarbon desulfurization tower 10, liquid hydrocarbon sweetening reactor 11, cooler II 12, feed tank 13, absorption tower 14, demethanizer 15, deethanizer 16, impurity treatment unit 17. Depropanizer 18, propylene rectification tower 19 and absorbent recovery tower 20, excluding dehydration devices;

[0084] Wherein, the oil-gas feed line is connected with the inlet of the gas-liquid separation tank I1, and the tank top of the gas-liquid separation tank I1 is connected with the first stage 2 of the compressor I, the second stage 3 of the compressor I, and the debutanizer 4 successively, and the liquid phase between the...

Embodiment 2

[0122] use as figure 2 The process flow diagram shown is for high-pressure desulfurization and separation of oil and gas.

[0123] Wherein, the difference between the present embodiment and the embodiment 1 is that in the present embodiment step (9), the second method is adopted for separation, that is, demethanization, depropanization, deethanization and rectification of propylene are carried out in sequence to separate the components of each product and Properties are shown in Table 6, and the properties of the extracted stable gasoline product are shown in Table 7.

[0124] Table 6

[0125]

[0126]

[0127] Table 7

[0128]

[0129]

Embodiment 3

[0131] use as figure 2 The process flow diagram shown is for high-pressure desulfurization and separation of oil and gas.

[0132] Among them, the difference between this embodiment and embodiment 2 is:

[0133] In depropanization, the separated C2 and C3 components are extracted from the upper part of the depropanizer, and then dried by the drying unit 21 before being sent to the deethanizer.

[0134] The composition and properties of the separated products are shown in Table 8, and the properties of the extracted stable gasoline products are shown in Table 9.

[0135] Table 8

[0136]

[0137]

[0138] Table 9

[0139]

[0140]

[0141] It can be seen from the data in the above table that the process of the present invention is simple, the operating conditions are mild, the cooling capacity consumption is small, and the separation and recovery of light hydrocarbons in oil and gas can be realized with less equipment. Among them, the total recovery rate of carb...

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Abstract

The invention belongs to the field of chemical industry, and specifically discloses a device and method for high-pressure desulfurization and separation of oil and gas. The method has simple flow, mild operating conditions, less cooling capacity consumption, and can realize the separation of light hydrocarbons in oil and gas with less equipment. and recovery, especially the efficient separation and recovery of C2, C3 and C4 components can be realized, and the present invention adopts gas phase and liquid phase for desulfurization and desulfurization respectively, and the gas phase is desulfurized and desulfurized under high pressure, and the volume of the equipment is small, The investment is low, and the desulfurization effect is good; at the same time, the content of heavy hydrocarbons in the gas phase is reduced, which can prevent heavy hydrocarbons from condensing into the amine liquid, and can effectively avoid the foam entrainment of the desulfurization device caused by the foaming of the amine liquid, ensuring the smooth operation of the device .

Description

technical field [0001] The invention belongs to the field of oil refining and chemical industry, and more specifically relates to a device and method for high-pressure desulfurization and separation of oil and gas, and more specifically relates to high-pressure oil and gas desulfurization and separation in processes with high gas yields such as catalytic cracking, catalytic cracking, and delayed coking. Device and method for desulfurization and separation. Background technique [0002] Light hydrocarbons refer to components such as methane, ethane, ethylene, propane, propylene, and C4 obtained from petrochemical processes. The separation process of light hydrocarbons has always been the focus of petrochemical processes. Among them, the separation process between carbon 2, carbon 3 and carbon 4 is relatively mature, and rectification is usually used. Due to the low boiling point of methane, if distillation is used to separate methane and carbon dioxide, it needs to be cooled...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02B01D53/14C07C7/00C07C11/06C07C9/04C07C9/06C07C9/08C07C9/10
CPCC10G53/02B01D53/1468B01D53/1475B01D53/1487C07C7/005B01D2252/10B01D2252/204C07C11/06C07C9/04C07C9/06C07C9/08C07C9/10Y02P20/50
Inventor 黄孟旗余龙红吴迪刘凯祥丁昱文刘罡
Owner SINOPEC ENG
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