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Light hydrocarbon recovery method and device

A light hydrocarbon recovery and absorbent technology, which is applied in the recovery of liquid hydrocarbon mixtures, chemical instruments and methods, and treatment of hydrocarbon oil, etc. Low, small size effect

Active Publication Date: 2021-03-19
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the existing light hydrocarbon recovery process technology, the C3 / C4 component is usually recovered first, and then the C2 component is recovered. The process is long, and there is a secondary separation between the components, and the investment and energy consumption are high. , the operation is more complicated

Method used

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  • Light hydrocarbon recovery method and device
  • Light hydrocarbon recovery method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Light hydrocarbon recovery device, including: heat / cooling oil feed line, denal column 1, fractionation column 2, compressor 3, cooler 4, gas-liquid separation tank I5, rich gas desulfurization tower 6, liquid hydrocarbon demonstio Tower 7, reel 8, gas-liquid separation tank II, absorption tower 10, and separation unit;

[0107] Among them, the heat / cold low-filled oil feed line is connected to the depripane column 1;

[0108] The depene tower 1 is provided with a condenser and a reflow tank, a tower and a fractionation column 2, and the top of the column is sequentially connected to the condenser, the reflow tank, and the tank tank is sequentially and the rich gas desulfurization tower 6, the reel 8, gas The liquid separation tank II9 is ​​connected, the bottom is sequentially with the liquid hydrocarbon 1. The recess 8, the gas-liquid separation tank II9 is ​​connected;

[0109] The gas-liquid separation tank II9 can top is connected to the absorption tower 10, and th...

Embodiment 2

[0139] Use figure 2 The process flow diagram shows oil and gas desulfurization and the recovery of light hydrocarbons.

[0140] Among them, the difference between the present embodiment and the first embodiment is:

[0141] (7) Separation:

[0142] Demethyl: The liquid phase from the gas-liquid separation tank II9 can remove methane in the demethhane tower 11, while removing components of less C2 and C2 or more, the dehydrin tower 11 tower is closed after cooling. The gas-liquid separation tank II9, the tower is delivered to the decene butterore 15; the operation temperature of the demethhane tower 11 tower is 15 to 40 ° C, the operating pressure is 2.25 ~ 2.85 MpAg;

[0143]Dytanone: The liquid phase from the bottom of the demethhane tower 11 is separated from the component of C3 and C3 below the deceanent tower 15, and the separated tower is delivered to the dehydrophane tower 12, the bottom liquid phase At least a portion was sent to the absorbent tower 10 as a mixed C4 absorb...

Embodiment 3

[0156] Use image 3 The process flow diagram shows oil and gas desulfurization and the recovery of light hydrocarbons.

[0157] Among them, the difference between the present embodiment and the first embodiment is:

[0158] (7) Separation:

[0159] Demethyl: The liquid phase from the gas-liquid separation tank II9 can remove methane in the demethhane tower 11, while removing components of less C2 and C2 or more, the dehydrin tower 11 tower is closed after cooling. The gas-liquid separation tank II9, the bottom of the tower is delivered to the propylphane tower I13; the operating temperature of the demetaxane tower 11 tower is 15 to 40 ° C, the operating pressure is 2.25 ~ 2.85 MpAg;

[0160] Phane: The liquid phase components from the bottom of the demethhane tower 11 were separated in the delxtin column I13, and the components of the separated C3 and C3 were removed from the top of the propylpane column I13 column. 12, at least a portion of the bottom component is sent to the abs...

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Abstract

The invention belongs to the field of oil refining and chemical engineering, and particularly discloses a light hydrocarbon recovery method and device. The method is simple in process, mild in operation conditions and low in cold energy consumption; separation and recovery of light hydrocarbon in a hydrocracking process can be realized by using little equipment, and particularly, efficient separation and recovery of ethane, propane and C4 components can be realized; and the recovery rate of ethane reaches 97 wt% or above, the recovery rate of propane reaches 98 wt% or above, the methane content of the recovered ethane is not larger than 1 vol%, and the ethane content of the recovered propane is not larger than 300 ppmv.

Description

Technical field [0001] The present invention belongs to the field of refining and chemical workers, and more particularly to a light hydrocarbon recovery method and apparatus, and more particularly to a light hydrocarbon recovery in a hydrocracking process. Background technique [0002] Hydrocracking is one of the main processing processes of the refinery, mainly with heavy fractions such as wax oil under high pressure, hydrogenation and catalyst, by hydrogenation treatment and hydrocracking, etc. to achieve heavy oil light The purpose of the purpose. Hydrocracking produces a certain number of light hydrocarbons of C1 to C4, yields about 3 to 8% by weight, and the hydrocarbon recovery of the conventional hydrocalcogen cage is mainly for recovering Liquefaction gas (C3 / C4) components, and the process setting is relatively complete. Mainly set up a denal tower, absorb detachment tower, stabilized tower, dry gas desulfurization tower, liquefied gas desulfurization tower. The hydro...

Claims

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Application Information

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IPC IPC(8): C10G5/04C10G5/06C10G5/00C07C7/00C07C7/04C07C7/11C07C9/06C07C9/08C07C9/10C07C9/12
CPCC10G5/06C10G5/04C10G5/00C07C7/005C07C7/04C07C7/11C10G2300/202C10G2300/207C10G2400/04C10G2400/02C07C9/06C07C9/08C07C9/10C07C9/12
Inventor 黄孟旗吴迪姚爱智郝少博刘凯祥
Owner SINOPEC ENG
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