Chemical principle: Using ferrous chloride solution as the absorption liquid and iron as the regenerant, chlorine and ferrous chloride undergo a redox reaction to generate ferric chloride, which can be reduced by the regenerant. The chemical reaction formula is as follows:   2FeCL2+2CL2=2FeCL3 2FeCL3+Fe=3FeCL2   Advantage: 1. Strong absorption capacity and large capacity, the...