Method and System for Removing Acid Gas from Ethylene Cracking Gas

Abstract

A method for removing acid gas from ethylene cracking gas. The method comprises: sequentially subjecting ethylene cracking gas containing acid gas to first-stage supergravity amine scrubbing, second-stage supergravity amine scrubbing, and washing with water, wherein a first-stage compound amine solution is used in the first-stage supergravity amine scrubbing, and a second-stage compound amine solution is used in the second-stage supergravity amine scrubbing. In the present invention, a supergravity technique is used to intensify the amine scrubbing process, and the compound amine solutions are used in cooperation, such that the removal depth of the acid gas is greatly increased, and hydrogen sulfide and carbon dioxide can respectively reach a level of ≤1 μL/L without needing an alkali washing unit.

Dependencies are inferred from the claim text.