The Logic Behind The Magic." Gas Dew Point Control and Metering".

Dry gas from TEG overhead KO drum flows to Gas/Gas Exchanger where it is cooled by Low Temperature Separator overhead stream. The Gas/Gas Exchanger is a special Printed Circuit Heat Exchanger design. The exchanger is protected by strainers in order to avoid oversized particles entering Sales Gas Metering Skid.

JT valves provides cooling of the gas stream. The dew point conditioning unit is designed to achieve a hydrocarbon dew point of 13 degC at 400 psig. As traces of liquid may be carried over from the Low Temperature Separator in gas phase, therefore a 3 degC margin is provided in the design, maintaining the hydrocarbon dew point under the specification.

The cold gas flows into the Low Temperature Separator where the condensed hydrocarbon is accumulated. The condensed hydrocarbon is then combined with compressed gas entering the 2nd Stage Flash Gas Compressor Suction Scrubber.

The Low Temperature Separator is a cold insulated vessel equipped with level control and safety devices.