Patent ID: 11873274
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method of regenerating triethylene glycol (TEG) in a natural-gas dehydration system, comprising:
removing water from TEG in a TEG regeneration still column having a fired-heater reboiler comprising a burner and a reboiler vessel;
controlling TEG bath temperature in the reboiler vessel and weight percent of oxygen gas in a stack effluent from the burner by a control system comprises automatically adjusting flow rate of the air via an air control valve disposed along an air conduit conveying the air from a supply header to the air control valve and from the air control valve to the burner, and adjusting flow rate of the fuel via a fuel control valve disposed along a conduit conveying the fuel to the burner while maintaining a specified weight ratio of the air to the fuel, wherein the air flows through the air control valve, and wherein the air does not comprise ambient air;
measuring the flow rate of the air via an air flow meter disposed along the air conduit conveying the air to the burner;
measuring, via an oxygen analyzer disposed along a stack having the stack effluent, the weight percent of oxygen gas in the stack effluent; and
indicating the weight percent of oxygen gas as measured to the control system, wherein controlling the weight percent of oxygen gas by the control system automatically adjusting the flow rate of the air and the flow rate of the fuel is in response to the weight percent of oxygen gas as measured.