Energy-saving utilization of APG with liquid products and DSG production
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Process Description Feedstock – APG – is mixed with the stabilization gas from separator 9, compressed using stages 1, 2 of the compressor station and cooled in heat exchanger 3. The cooled APG, together with the reflux removed from the bottom of refluxer 6, is separated in separator 4 into the residue, gas and water , which is removed from the unit. The gas is dried and/or treated in unit 5 and supplied into refluxer 6, the top of which is cooled by a refrigerant supplied from a cold source 7. From the top of refluxer 6, the refluxing gas is discharged, heated in heat exchanger 3 and discharged as dry stripped gas. Separation residue pressure is reduced with the use of device 8, and sent to separator 9, from which NGL is removed.
Process features
Deep extraction of hydrocarbons С3+ by low temperature condensation and refluxing
Minimum heat of DSG combustion
Block-modular configuration of equipment
Low capital investment and operating costs
Technical Specification
APG temperature: 35–60 °С
APG pressure: 0,005–0,35 MPa
APG capacity up to 15 000 nm³/hour
Products: DSG with reduced heat of combustion, NGL of grade "A" or AUTOGAS
Withdrawal of hydrocarbon fraction С3+ of at least 90%