Sodium chlorite production equipment with large capacity and no waste acid discharge, and production method thereof

The invention discloses sodium chlorite production equipment with large capacity and no waste acid discharge, and a production method thereof. The device consists of a chlorine dioxide generation system, a sodium chlorite preparation system, a condensate processing system, a tail gas processing system and a mirabilite processing system. The method comprises the following steps: firstly, taking hydrogen peroxide as a reductant and taking sodium chlorate as an oxidizing agent, and utilizing a generator to prepare chlorine dioxide; then, through a condenser, condensing the chlorine dioxide and water vapor, and enabling the condensed chlorine dioxide gas to react with the hydrogen peroxide and alkali liquor to generate a sodium chlorite solution; sending condensate into an aeration tank, enabling the chlorine dioxide gas to enter a tail gas washing tower to be absorbed and washed by the alkali liquor and the hydrogen peroxide, evacuating, concentrating and washing a byproduct mirabilite generated in a chlorine di