Tri-ethylene glycol circulation automation system and method

A non-transitory computer-readable medium storing instructions executable by one or more computer systems to perform operations comprising:

• periodically receiving, by a computer system and from a temperature sensor, a temperature signal representative of a temperature of a process gas upstream of a contactor column of a gas dehydration unit, wherein the process gas is cross-contacted with tri-ethylene glycol (TEG) within the contactor column to reduce water content of the process gas to satisfy a threshold water content;
• periodically receiving, by the computer system and from a flow sensor, a flow rate signal representative of a flow rate of the process gas upstream of the contactor column;
• periodically determining, by the computer system and using the temperature signal and the flow rate signal, a quantity of TEG to be introduced into the contactor column to reduce the water content of the process gas to satisfy the threshold water content;
• and
• periodically controlling, by the computer system and based on the quantity of the TEG, an operation of a flow control valve configured to flow the TEG into the contactor column.

A system comprising:

• one or more computers;
• and
• a computer-readable medium storing instructions executable by one or more computer systems to perform operations comprising:
• periodically receiving, by a computer system and from a temperature sensor, a temperature signal representative of a temperature of a process gas upstream of a contactor column of a gas dehydration unit, wherein the process gas is cross-contacted with tri-ethylene glycol (TEG) within the contactor column to reduce water content of the process gas to satisfy a threshold water content;
• periodically receiving, by the computer system and from a flow sensor, a flow rate signal representative of a flow rate of the process gas upstream of the contactor column;
• periodically determining, by the computer system and using the temperature signal and the flow rate signal, a quantity of TEG to be introduced into the contactor column to reduce the water content of the process gas to satisfy the threshold water content;
• and
• periodically controlling, by the computer system and based on the quantity of the TEG, an operation of a flow control valve configured to flow the TEG into the contactor column.