CARBON DIOXIDE RECOVERY APPARATUS AND CARBON DIOXIDE RECOVERY METHOD
First Claim
1. A carbon dioxide recovery apparatus comprising:
- an absorption tower in which a discharge gas containing CO2 is contacted with an absorbing liquid comprising an amino group-containing compound with steric hindrance and a reaction accelerator to allow said absorbing liquid to absorb CO2;
a temperature regulation unit in which a first rich solution discharged from said absorption tower is heated or cooled to be a solution in which a precipitate comprising said reaction accelerator is dispersed or to be a solution comprising a reaction accelerator rich phase comprising a large amount of said reaction accelerator compared to said first rich solution;
a phase separation unit in which a second rich solution, said second rich solution being an absorbing liquid passed through said temperature regulation unit, is separated into an amino group-containing compound rich phase and a reaction accelerator rich phase to discharge said amino group-containing compound rich phase as a third rich solution and to discharge said reaction accelerator rich phase as a reaction accelerator rich solution, said amino group-containing compound rich phase comprising a large amount of an amino group-containing compound compared to said first rich solution, and said reaction accelerator rich phase comprising a large amount of said reaction accelerator compared to said first rich solution;
a regeneration tower in which CO2 contained in said third rich solution is separated to regenerate said third rich solution; and
a solution mixing line through which said reaction accelerator rich solution is supplied to a first lean solution which is an absorbing liquid discharged from said regeneration tower.
1 Assignment
0 Petitions
Accused Products
Abstract
The CO2 recovery apparatus 10A includes: an absorption tower 11 in which a discharge gas 21 is contacted with a second lean solution 22B to allow the second lean solution 22B to absorb CO2; a temperature regulator 12 in which a first rich solution 23A discharged from the absorption tower is heated or cooled to allow the first rich solution 23A to be a solution in which a precipitate containing the reaction accelerator is dispersed; a phase separator 13 in which a second rich solution 23B passed through the temperature regulator 12 is separated into an amino group-containing compound rich phase 31 and a reaction accelerator rich phase 32; a regeneration tower 15 in which a third rich solution 23C is regenerated; and a solution mixing line L13A through which a reaction accelerator rich solution 34 is supplied to a first lean solution 22A discharged from the regeneration tower 15.
-
Citations
19 Claims
-
1. A carbon dioxide recovery apparatus comprising:
-
an absorption tower in which a discharge gas containing CO2 is contacted with an absorbing liquid comprising an amino group-containing compound with steric hindrance and a reaction accelerator to allow said absorbing liquid to absorb CO2; a temperature regulation unit in which a first rich solution discharged from said absorption tower is heated or cooled to be a solution in which a precipitate comprising said reaction accelerator is dispersed or to be a solution comprising a reaction accelerator rich phase comprising a large amount of said reaction accelerator compared to said first rich solution; a phase separation unit in which a second rich solution, said second rich solution being an absorbing liquid passed through said temperature regulation unit, is separated into an amino group-containing compound rich phase and a reaction accelerator rich phase to discharge said amino group-containing compound rich phase as a third rich solution and to discharge said reaction accelerator rich phase as a reaction accelerator rich solution, said amino group-containing compound rich phase comprising a large amount of an amino group-containing compound compared to said first rich solution, and said reaction accelerator rich phase comprising a large amount of said reaction accelerator compared to said first rich solution; a regeneration tower in which CO2 contained in said third rich solution is separated to regenerate said third rich solution; and a solution mixing line through which said reaction accelerator rich solution is supplied to a first lean solution which is an absorbing liquid discharged from said regeneration tower. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A carbon dioxide recovery method comprising:
-
a CO2 recovery step of contacting a discharge gas containing CO2 with an absorbing liquid comprising an amino group-containing compound with steric hindrance and a reaction accelerator to allow said absorbing liquid to absorb CO2 in an absorption tower; a temperature regulation step of heating or cooling a first rich solution which is an absorbing liquid discharged from said absorption tower to allow said first rich solution to be a solution in which a precipitate comprising said reaction accelerator is dispersed or to be a solution comprising a reaction accelerator rich phase comprising a large amount of said reaction accelerator compared to said first rich solution in a temperature regulation unit; a phase separation step of separating a second rich solution, said second rich solution being an absorbing liquid passed through said temperature regulation unit, into an amino group-containing compound rich phase and a reaction accelerator rich phase to discharge said amino group-containing compound rich phase as a third rich solution and to discharge said reaction accelerator rich phase as a reaction accelerator rich solution, said amino group-containing compound rich phase comprising a large amount of an amino group-containing compound compared to said first rich solution, and said reaction accelerator rich phase comprising a large amount of said reaction accelerator compared to said first rich solution; a regeneration step of separating CO2 contained in said third rich solution to regenerate said third rich solution in a regeneration tower; and a solution mixing step of mixing a first lean solution which is an absorbing liquid discharged from said regeneration tower with said reaction accelerator rich solution. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
Specification