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US 2021/0061740 A1Published application
Method and apparatus for filtering heat transfer fluid from a monoethylene glycol stream
AssigneeSchlumberger Technology Corporation
InventorNasser Ghorbani
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for reclaiming monoethylene glycol from a produced hydrocarbon stream are described. The method includes directly contacting a stream containing monoethylene glycol (MEG) with a heat transfer fluid, vaporizing the MEG by transferring heat from the heat transfer fluid to the MEG to produce a vapor stream, liquefying the vapor stream to form a liquid stream, passing the liquid stream through a filter comprising an oleophilic material, and removing residual heat transfer fluid from the liquid stream using the filter.
Claims20
A method, comprising:
- directly contacting a stream containing monoethylene glycol (MEG) with a heat transfer fluid (HTF);
- vaporizing the MEG by transferring heat from the HTF to the MEG to produce a rich MEG stream;
- condensing the rich MEG stream;
- passing the rich MEG stream through a filter comprising an oleophilic material;
- and
- removing residual HTF from the liquid stream using the filter to form a clean MEG stream.
3 more elements
A method, comprising:
- mixing a MEG concentrate stream with an HTF to form a vaporization mixture;
- vaporizing a rich MEG stream from the vaporization mixture in a vessel;
- passing the rich MEG stream through a filter comprising a filter material selective to the HTF in a filter flow direction;
- immobilizing the HTF on the filter material to form a clean MEG stream;
- detecting an amount of the HTF in the clean MEG stream;
- determining a filter efficiency based on the amount of the HTF in the clean MEG stream;
- determining an end point based on the filter efficiency;
- and
- upon determining the end point, flushing the filter material by flowing a low polarity aprotic solvent through the filter in a flush flow direction.
6 more elements
A method, comprising:
- mixing a MEG concentrate stream with an HTF to form a vaporization mixture;
- vaporizing a rich MEG stream from the vaporization mixture in a vessel;
- passing the rich MEG stream through a plurality of filters comprising a filter material selective to the HTF in a filter flow direction;
- recycling a portion of the rich MEG stream through one or more of the plurality of filters;
- immobilizing the HTF on the filter material to form a clean MEG stream;
- detecting an amount of the HTF in the clean MEG stream;
- determining a filter efficiency based on the amount of the HTF in the clean MEG stream;
- determining an end point based on the filter efficiency;
- and
- upon determining the end point, flushing the filter material by flowing a low polarity aprotic solvent through the filters in a flush flow direction.
7 more elements
Dependencies are inferred from the claim text.