System for separating gas
AssigneeCri, Ehf
InventorsEmeric SARRON, Huni SIGHVATSSON, Asgeir IVARSSON
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Abstract
An improved system for separating gas from a process stream by providing a stripping unit at the overhead stream of a fractionation column to selectively and effectively remove the gas using a stripping fluid without providing a dedicated light-ends separations unit. The stripper unit may be connected to the reflux drum at the overhead stream. The system for separating gas further achieves greater thermodynamic efficiency by means of a split column design using mechanical vapor recompression with the reboiler and condenser integrated in a falling-film evaporator- or thermosiphon-type vapo-condenser.
Claims20
A system for separating a gas from a process stream, the system comprising:
- a separation unit configured to receive the process stream of a chemical process and to separate at least one component of the process stream, the system comprising a dual condenser arrangement comprising a first condenser and a second condenser provided at an overhead portion of the separation unit and receiving an overhead stream of the process stream from the overhead portion of the separation unit, the dual condenser arrangement being configured for condensing at least a portion of the overhead stream of the process stream;
- and
- a stripper unit configured to receive the condensed portion of the overhead stream of the process stream from the dual condenser arrangement, the stripper unit being configured for separating the gas from the condensed portion of the overhead stream of the process stream by introducing at least one stripping fluid thereunto;
- wherein a liquid portion from the stripper unit flows to a reflux drum, a portion of the liquid portion being conveyed from the reflux drum to the separation unit.
A method for separating a gas from a process stream, the method comprising the steps of:
- providing a separation unit and system configured to receive a process stream of a chemical process and to separate at least one component of the process stream, wherein the system comprises a dual condenser arrangement comprising a first condenser and a second condenser, wherein the dual condenser arrangement is provided at an overhead portion of the separation unit, the dual condenser arrangement condensing at least a portion of the overhead stream of the process stream;
- providing a stripper unit configured to receive the condensed portion of the overhead stream of the process stream from the dual condenser arrangement, the stripper unit separating a gas from the condensed portion of the overhead stream by introducing at least one stripping fluid thereto;
- and
- conveying a liquid portion from the stripper unit to a reflux drum, a portion of the liquid portion being conveyed from the reflux drum to the separation unit.
Dependencies are inferred from the claim text.