METHOD OF SEPARATING ACID GAS FROM WATER-CONTAINING FLUID FLOW Russian patent published in 2017 - IPC B01D53/14 B01D53/40 C10L3/10 

FIELD: chemistry.

SUBSTANCE: method includes contacting a water-containing fluid flow in the absorption zone with an absorbent that contains amine to form a fluid flow subjected to the removal of acid and an acidic gase-saturated absorbent agent, contacting a fluid flow subjected to the removal of acid with an aqueous wash liquid in the washing zone, through which the washing liquid is conducted in a single pass without pumping with the pump to transfer the jointly carried amine to this washing fluid to produce fluid flow, subjected to the removal of amine and removal of acid, and the amine-saturated washing liquid, cooling the fluid flow subjected to the removal of amine and removal of acid below the washing zone in the flow direction. Condensate is condensed from the head part of the absorption device, feeding the saturated absorbent to the desorption zone, in which acid gases are released. A regenerated absorbent and desorbed acid gases are produced, the regenerated absorbent is fed back to the absorption zone in order to organize a closed cycle of the absorbent, the absorption material of the amine-saturated washing liquid and the condensate from the head part of the absorption device are introduced to the closed cycle, the desorbed acid gases are fed through the zone of concentration, and the acid gases are cooled leaving the head part of the concentration zone, for condensing a condensate from the head part of the desorption device, which is partly fed back into the concentration area, and is partially derived from the process.

EFFECT: effective retention of amines from the fluid flows while maintaining the water balance of the device.

17 cl, 3 dwg, 6 ex