Acid component removal device, acid component removal method, and acid gas removal device

An acid component removal device for removing an acid component from an acid gas absorbent containing an amine, comprising: 5 an anode; a cathode; and an electrodialysis structure having four compartments formed by arranging an first membrane which is either an anion exchange membrane or a cation exchange membrane, a second 10 membrane which is a bipolar membrane, and a third membrane which is either an anion exchange membrane or a cation exchange membrane and which is the other of the first membrane, in this order, from the anode end to the cathode end between the anode and the cathode, with a space each between 15 the membranes. S eI la-O C) L?(0 N-l rnu