Technique of separating and recovering lighter hydrocarbons in refinery dried gas

A technology for separation and recovery of dry gas from refineries, which is applied in the recovery of liquid hydrocarbon mixtures and the petroleum industry. It can solve problems such as complex processes, high operating costs, and large equipment, and achieve good separation and recovery effects, low operating costs, and compact equipment. Effect
CN100487078CInactive Publication Date: 2009-05-13SHANGHAI DONGHUA ENVIRONMENT ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI DONGHUA ENVIRONMENT ENG
Publication Date
2009-05-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses the technology of separating and retrieving lighter hydrocarbons from refinery gas. The method comprises the following steps: compressing the refinery gas with compressor, separating the condensate water; then separating with steam separator. Using the method, the recovery ratios of ethene and ethane are up to 94%. The method can be used to return lighter hydrocarbons from refinery gas.
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Description

technical field

[0001] The invention relates to a process for separating and recovering light hydrocarbons from refinery dry gas. Background technique

[0002] Refinery dry gas usually contains 8-20% ethylene and about 10% ethane, as well as useful components such as propylene and propane. But at present, most of the refinery dry gas is sent to the gas pipeline network as fuel gas, and some are even put into the torch for burning, resulting in a great waste of resources.

[0003] If a suitable separation method is used to recover ethane and ethylene, the former can be used as cracking raw material for ethylene plant, and the latter can be used as petrochemical raw material. Therefore, the separation and recovery of light hydrocarbons from refinery dry gas has great economic and social benefits.

[0004] Although pressure swing adsorption method, intercooler oil absorption method and cryogenic separation method have been developed at home and abroad to recover light hydroca...

Claims

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