Process for recovery of hydrate inhibitors
AssigneeVME Canada LTD.
InventorsTerrance John Larry Trofimuk, Daniel John Domanko
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Abstract
The present invention provides a process for recovering glycol from a process stream comprising glycol, water, dissolved salts, and hydrocarbons. The process comprises subjecting the process stream to a salt-enrichment process to obtain a salt-enriched stream having a salt concentration higher than salt concentration of the process stream, and a salt-reduced stream; subjecting the salt-enriched stream to a glycol reclaiming process to separate the salts and at least a portion of the hydrocarbons from the salt enriched stream to obtain a substantially salt-free water-glycol stream; and blending the salt reduced stream from the salt-enrichment process with the substantially salt-free stream to produce a reclaimed water-glycol stream.
Claims17
A process for recovering glycol from a process stream comprising glycol, water, dissolved salts, and hydrocarbons, the process comprising:
- a) subjecting the process stream to a salt-enrichment process to obtain a salt-enriched stream having a salt concentration higher than a salt concentration of the process stream, and a salt-reduced stream, wherein the salt-enrichment process comprises an electro-separation process and/or a deionization process;
- b) subjecting the salt-enriched stream to a glycol reclaiming process to separate the salts and at least a portion of the hydrocarbons from the salt-enriched stream to obtain a substantially salt-free water-glycol stream;
- and
- c) blending the salt-reduced stream from step a) with the substantially salt-free water-glycol stream to produce a reclaimed water-glycol stream.
A system for recovering glycol from a process stream comprising glycol, water, dissolved salts, and hydrocarbons, the system comprising:
- a salt-enrichment unit configured to obtain a salt-enriched stream via a salt-enrichment process having a salt concentration higher than a salt concentration of the process stream, and obtain a salt-reduced stream, wherein the salt-enrichment process comprises an electro-separation process and/or a deionization process, and the salt-enrichment unit comprises a continuous electrodeionization (CEDI) unit;
- a glycol reclaimer unit configured to receive the salt-enriched stream and separate the salts and at least a portion of the hydrocarbons from the salt-enriched stream to obtain a substantially salt-free water-glycol stream;
- and
- a glycol regeneration unit configured to receive a reclaimed water-glycol stream and remove water and any remaining hydrocarbons to produce a recovered lean-glycol stream suitable for re-introduction into the process stream,
- wherein the reclaimed water-glycol stream comprises the salt-reduced stream blended with the substantially salt-free water-glycol stream.
Dependencies are inferred from the claim text.