| 摘要 |
A natural gas liquid plant includes a separator (103) that receives a cooled low pressure feed gas (4), wherein the separator (103) is coupled to an absorber (108) and a demethanizer (110). Refrigeration duty of the absorber (108) and demethanizer (110) are provided at least in part by expansion of a liquid portion of the cooled low pressure feed gas (4) and an expansion of a liquid absorber bottom product (19), wherein ethane recovery is at least 85 mol% and propane recovery is at least 99 mol%. Contemplated configurations a re especially advantageous as upgrades to existing plants with low pressure fee d gas where high ethane recovery is desirable.
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