Method and absorbent composition for recovering a gaseous component from a gas stream
First Claim
1. A method for recovering a gaseous component from an incoming gas stream, comprising:
- a) flowing the incoming gas stream through a gas-liquid contact apparatus wherein the incoming gas stream is contacted with a cooled lean aqueous absorbing medium thereby transferring at least a portion of the gaseous component from the incoming gas stream to the aqueous absorbing medium thereby forming a lean treated gas stream and a rich aqueous absorbing medium;
b) conveying the rich aqueous absorbing medium from the gas-liquid contact apparatus to a regenerator, the rich aqueous absorbing medium being heated by passage through a first heat-exchanger interposed the gas-liquid contact apparatus and the regenerator;
c) at an elevated temperature in the regenerator, desorbing at least a portion of the gaseous component from the heated rich aqueous absorbing medium at a temperature to form a heated overhead gas stream comprising the gaseous component and a heated regenerated lean aqueous absorbing medium;
d) conveying the a heated regenerated lean aqueous absorbing medium from the regenerator to the gas-liquid contact apparatus by passage through the first heat-exchanger wherein at least a portion of the heat is recovered from the regenerated lean aqueous absorbing medium thereby producing a partially cooled regenerated lean aqueous absorbing medium;
e) flowing the heated overhead gas stream through a second heat exchanger to recover a heated stream and a cooled first condensate therefrom; and
f) commingling the cooled condensate with the partially cooled regenerated lean aqueous absorbing medium thereby providing a cooled lean aqueous absorbing medium to the gas-liquid contact apparatus.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for recovering a gaseous component from an incoming gas stream is described. The incoming gas stream is contacted with a lean aqueous absorbing medium to absorb at least a portion of the gaseous component from the incoming gas stream to form a lean treated gas stream and a rich aqueous absorbing medium. At least a portion of the gaseous component is desorbed from the rich aqueous absorbing medium at a temperature to form an overhead gas stream and a regenerated aqueous absorbing medium. At least a portion of the overhead gas stream is treated to recover a condensate stream. At least a portion of the condensate stream is used to form a heated stream. At least a portion of the heated stream is recycled back to the desorbing step. Novel absorbing medium compositions to recover carbon dioxide and/or hydrogen sulfide are also described.
-
Citations
28 Claims
-
1. A method for recovering a gaseous component from an incoming gas stream, comprising:
-
a) flowing the incoming gas stream through a gas-liquid contact apparatus wherein the incoming gas stream is contacted with a cooled lean aqueous absorbing medium thereby transferring at least a portion of the gaseous component from the incoming gas stream to the aqueous absorbing medium thereby forming a lean treated gas stream and a rich aqueous absorbing medium; b) conveying the rich aqueous absorbing medium from the gas-liquid contact apparatus to a regenerator, the rich aqueous absorbing medium being heated by passage through a first heat-exchanger interposed the gas-liquid contact apparatus and the regenerator; c) at an elevated temperature in the regenerator, desorbing at least a portion of the gaseous component from the heated rich aqueous absorbing medium at a temperature to form a heated overhead gas stream comprising the gaseous component and a heated regenerated lean aqueous absorbing medium; d) conveying the a heated regenerated lean aqueous absorbing medium from the regenerator to the gas-liquid contact apparatus by passage through the first heat-exchanger wherein at least a portion of the heat is recovered from the regenerated lean aqueous absorbing medium thereby producing a partially cooled regenerated lean aqueous absorbing medium; e) flowing the heated overhead gas stream through a second heat exchanger to recover a heated stream and a cooled first condensate therefrom; and f) commingling the cooled condensate with the partially cooled regenerated lean aqueous absorbing medium thereby providing a cooled lean aqueous absorbing medium to the gas-liquid contact apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
Specification