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Separation process of petroleum associated gas

A technology of petroleum associated gas and associated gas, which is applied in the petroleum industry, gas fuel, fuel and other directions, can solve the problems of methane being unable to condense, complicated and complicated devices, high cost, and achieve the effects of improving efficiency, fast separation rate and high selectivity.

Active Publication Date: 2019-02-22
杭州勃扬能源设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the recovery and utilization of associated gas, CO 2 Separation is also a very important pretreatment step. The traditional method adopts the process route of absorption, adsorption separation, and condensation. The equipment is cumbersome and complicated, and the cost is high. Moreover, under certain temperature and pressure conditions, the associated gas is limited by the gas-liquid balance, and part of the methane cannot be produced. condensation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the preparation one of composite film:

[0028] This embodiment is to prepare the composite membrane used in the membrane separation step of the petroleum associated gas separation process, first prepare the gel filtration layer of the middle layer:

[0029] The lead-silver alloy plate is used as the anode, and the rolled aluminum plate wrapped with a conductive sponge with a porosity of 60% is used as the cathode, and they are suspended in a zinc sulfate solution in parallel, and a 12V direct current is applied. When the elemental zinc fills the gap of the sponge, the electrolysis ends. Take out the sponge, soak it in a glycerin-ethanol solution with a glycerin concentration of 15wt% for 3 hours, place it in an oven at 60°C for 1 hour, and then put it in a muffle furnace at 250°C for 80 minutes, take it out, and use a deionized Wash it with water, dry it, and chop it to get a spongy skeleton;

[0030] The sponge-like skeleton is prepared by electrolytic ...

Embodiment 2

[0037] Embodiment 2: the preparation two of composite film:

[0038] This embodiment is to prepare the composite membrane used in the membrane separation step of the petroleum associated gas separation process, first prepare the gel filtration layer of the middle layer:

[0039]The lead-silver alloy plate is used as the anode, and the rolled aluminum plate wrapped with a conductive sponge with a porosity of 70% is used as the cathode, and they are suspended in the zinc sulfate solution in parallel, and 12V DC is applied. When the elemental zinc fills the gap of the sponge, the electrolysis ends. Take out the sponge, soak it in a glycerin-ethanol solution with a glycerol concentration of 20wt% for 3 hours, place it in an oven at 55°C for 2 hours, and then place it in a muffle furnace at 300°C for 60 minutes and take it out, and use a deionized Wash it with water, dry it, and chop it to get a spongy skeleton;

[0040] Dissolve 40g of 1-butyl-3-vinylimidazolium bromide in 300ml ...

Embodiment 3

[0044] Embodiment 3: the preparation three of composite film:

[0045] This embodiment is to prepare the composite membrane used in the membrane separation step of the petroleum associated gas separation process, first prepare the gel filtration layer of the middle layer:

[0046] The lead-silver alloy plate is used as the anode, and the rolled aluminum plate wrapped with a conductive sponge with a porosity of 80% is used as the cathode. They are suspended in a zinc sulfate solution in parallel, and 12V DC is applied. When the elemental zinc fills the gaps in the sponge, the electrolysis ends. Take out the sponge, soak it in a glycerol-ethanol solution with a glycerol concentration of 25wt% for 4 hours, place it in an oven at 50°C for 2 hours, and then place it in a muffle furnace at 350°C for 50 minutes, then take it out, and use a deionized Wash it with water, dry it, and chop it to get a spongy skeleton;

[0047] Dissolve 40g of 1-butyl-3-vinylimidazolium bromide in 300ml ...

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Abstract

The invention discloses a separation process of petroleum associated gas and belongs to the technical field of separation of associated gas. The separation process includes the steps of pretreatment,gas-liquid separation, CO2 separation, and gas recycling. The CO2 separation step employs a composite membrane to separate carbon dioxide; the composite membrane is of three-layer structure includinga polysulfone membrane layer as a surface layer, a gel filter layer as an intermediate layer, and a nonwoven layer as a bottom layer. The separation process of petroleum associated gas disclosed herein is suitable for separating carbon dioxide and methane. The composite membrane for the membrane separation step has high porosity and selectivity, as well as high permeation flux and deformation resistance; the separation process disclosed herein has good separation effect, employs compact equipment and is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of separation of associated gas, in particular to a separation process of petroleum associated gas. Background technique [0002] Petroleum-associated gas is a combustible mixture composed of low-molecular-weight saturated hydrocarbon-based hydrocarbon gas and a small amount of non-hydrocarbon gas naturally in porous formations under the surface, and it is often associated with crude oil. Strictly speaking, petroleum-associated gas is also petroleum, which is the gaseous form of petroleum. Petroleum-associated gas contains organic vapor, which is mainly methane, and also contains ethane, propane, butane, pentane and other hydrocarbons; petroleum-associated gas Gas components also include inert gases: nitrogen, carbon dioxide, hydrogen sulfide, helium, oxygen, hydrogen and other gases, mainly carbon dioxide. At present, the discharge of oilfield associated gas, especially in small and remote areas, has attra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10
CPCC10L3/101C10L3/104Y02C20/40
Inventor 李可心卢嘉威李士华
Owner 杭州勃扬能源设备有限公司
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