Glycol Regeneration Off-Gas System Design Enhancement Using Jacketed Gas Thermocompressor

A glycol regeneration system comprising:

• a stripper to extract water from rich glycol stream and to generate a stripped gas comprising vapor and a liquid comprising lean glycol, the stripper comprising a reboiler and a stripping column;
• a surge tank downstream to the stripper to store the lean glycol;
• and
• a jacketed gas thermocompressor downstream to the stripper to receive, heat, and compress the stripped gas, the jacketed gas thermocompressor comprising a jacket to receive at least a portion of the lean glycol as a heat exchanging fluid,
• wherein a water content of the lean glycol is less than that of the rich glycol stream.

A method of dehydrating a wet hydrocarbon gas, the method comprising:

• dehydrating the wet hydrocarbon gas in a scrubber using a lean glycol as an absorber, generating a dry hydrocarbon gas and a rich glycol stream comprising water and hydrocarbon impurities;
• removing at least a portion of the hydrocarbon impurities from the rich glycol stream in a flash drum;
• heating the rich glycol stream in a stripper to vaporize the water and the remaining hydrocarbon impurities as a stripped gas, leaving a regenerated glycol stream as a liquid;
• compressing the stripped gas using a jacketed gas thermocompressor by
• flowing at least a portion of the dry hydrocarbon gas to the jacketed gas thermocompressor as a motive fluid, and
• flowing at least a portion of the regenerated glycol stream to a jacket of the jacketed gas thermocompressor as a heat exchanging fluid;
• and
• generating a dried off-gas, wherein the water in the stripped gas is condensed without using an additional cooling system.