| 主权项 |
1. A process for removal of gaseous contaminants from a gas stream, comprising
a) contacting a gas stream comprising gaseous contaminants with a wash solution, to remove gaseous contaminants from the gas stream by absorption into the wash solution; b) passing used wash solution resulting from step a) to regeneration; c) regenerating used wash solution by removal of gaseous contaminants from the wash solution, to provide a regenerated wash solution and a gas comprising removed contaminants; d) passing the regenerated wash solution to reboiling; e) reboiling the regenerated wash solution for further removal of gaseous contaminants from the wash solution, to provide a reboiled wash solution; f) returning the reboiled wash solution to step a);
wherein during step f), the returned reboiler wash solution is subjected to heat-exchanging with the regenerated wash solution of step d) in a first heat-exchanging step, to heat the regenerated wash solution; andheat-exchanging with used wash solution of step b) in a second heat-exchanging step, to heat the used wash solution; and further comprisingwithdrawing a first portion of used wash solution resulting from the second heat-exchanging step; andbetween the first and second heat-exchanging steps, subjecting the returned reboiler wash solution to heat-exchanging with the withdrawn portion of used wash solution in a third heat-exchanging step, to heat the used wash solution. |
