Acid gas recovery system

An acidic gas recovery system comprising:

• an absorption tower into which a target gas of treatment containing an acidic gas as a recovery target gas is introduced, and that is configured to bring the target gas of treatment into contact with an absorbent liquid to discharge the absorbent liquid which has absorbed the acidic gas and an absorption tower discharge gas containing the target gas of treatment from which the acidic gas is removed;
• a regeneration tower that is configured to release the acidic gas from the absorbent liquid discharged from the absorption tower to discharge the absorbent liquid from which the acidic gas is released and a regeneration tower discharge gas containing the acidic gas;
• a gas-liquid separator that is configured to separate moisture contained in the regeneration tower discharge gas discharged from the regeneration tower to discharge separated discharge gas from which the moisture is separated and supply the separated moisture to the regeneration tower as drain water;
• a dewatering device that is configured to absorb the moisture contained in the regeneration tower discharge gas discharged from the regeneration tower;
• and
• a drain water adsorption device that is configured to bring the drain water supplied from at least one of the gas-liquid separator and the dewatering device to the regeneration tower into contact with activated carbon to remove hydrocarbons remaining in the drain water.

An acidic gas recovery system comprising:

• an absorption tower into which a target gas of treatment containing an acidic gas as a recovery target gas is introduced, and that is configured to bring the target gas of treatment into contact with an absorbent liquid to discharge the absorbent liquid which has absorbed the acidic gas and an absorption tower discharge gas containing the target gas of treatment from which the acidic gas is removed;
• a regeneration tower that is configured to release the acidic gas from the absorbent liquid discharged from the absorption tower to discharge the absorbent liquid from which the acidic gas is released and a regeneration tower discharge gas containing the acidic gas;
• a dewatering device that is configured to absorb moisture contained in the regeneration tower discharge gas discharged from the regeneration tower;
• and
• an outlet adsorption device that is configured to bring the regeneration tower discharge gas from which the moisture is removed in the dewatering device into contact with activated carbon to remove hydrocarbons remaining in the regeneration tower discharge gas.