Compression condensate conditioning in the flue gas condenser

1. A method of conditioning condensate generated in a compression section of a gas purification unit, said method comprising:

a) compressing carbon dioxide rich flue gas from a gas cooling, condensing and/or cleaning device;

b) cooling of the gas below the water dew point;

c) recirculating the condensate formed during the cooling in b) comprising carbon dioxide to the inlet of a lower end of the gas cooling, condensing and/or cleaning device;

d) introducing the condensate of step c) to the gas cooling, condensing and/or cleaning device; and

e) degassing of the condensate whereby the carbon dioxide rich vapor is released into the vapor phase in the lower end of the gas cooling, condensing and/or cleaning device.

2. The method of claim 1 , wherein the gas purification unit comprises a post combustion CO2 capture purification unit.

3. The method of claim 2 , wherein the post combustion CO 2 capture purification unit is an amine based absorption process.

4. The method of claim 2 , wherein the post combustion CO 2 capture purification unit is performed in a chilled ammonia system.

5. The method of claim 1 wherein step d) comprises

d) introducing the condensate of step c) into a separate compartment arranged within the gas cooling, condensing and/or cleaning device, for vapor disengagement/release and optional conditioning of the condensate.

6. The method of claim 1 comprising wherein step d) comprises

d) introducing the condensate of step c) into the lower part of the gas cooling, condensing and/or cleaning device.

7. The method of claim 1 wherein

c) recirculating the condensate of step b) into a vessel for releasing the carbon dioxide rich vapor and conditioning the condensate;

d) forwarding the carbon dioxide rich vapor to the flue gas condenser.

8. A system for conditioning condensate generated in a compression section of a gas purification unit, the system comprising:

a flue gas condenser

being operative for receiving at least a portion of partly cleaned carbon dioxide rich flue gas;

being operative for removing at least a portion of the water content of the partly cleaned carbon dioxide rich flue gas to condense water therefrom;

means for compressing the carbon dioxide rich flue gas;

means for condensing water vapor from the carbon dioxide rich flue gas; and

means for releasing parts of the carbon dioxide included in the water and returning it back to the flue gas.

9. The system of claim 8 , wherein the gas purification unit comprises a post combustion CO2 capture purification.

10. The system of claim 9 , wherein the gas purification unit comprises an amine based absorption process.

11. The system of claim 10 , wherein the post combustion CO 2 capture purification is performed in a chilled ammonia system.

12. The system of claim 8 , further comprising:

means for introducing the water comprising the carbon dioxide rich vapor phase is introduced into a separate compartment of the bottom of the flue gas condenser; and

means for conditioning the remaining degassed condensate.

13. The system of claim 8 , wherein the water comprising the carbon dioxide rich vapor phase is introduced into the bottom level of the flue gas condenser.

14. The of claim 8 , further comprising:

means for forwarding the water comprising the carbon dioxide rich vapor phase to a vessel for separation of water and carbon dioxide rich vapor phase;

means for conditioning the remaining degassed condensate; and

means for introducing the released carbon dioxide into the flue gas condenser.