Method and system for three-stage concentration of dilute waste acid

• Main Authors: JIN SANLIANG, LEE JONG-WON, LU HUIJUN, QIAO YUE
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2024
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention provides a dilute waste acid three-stage concentration method and system, belongs to the technical field of chemical engineering, and aims to solve the problem that the existing evaporation concentration method is low in treatment efficiency by introducing waste acid liquid into an evaporation concentration tank for one-stage and one-stage treatment, for example, performing two-stage evaporation through a two-effect evaporator. The steam generated by the steam generator is uniformly sprayed into the triple-effect evaporator through the air outlet holes, so that the steam is in full contact with waste acid in the triple-effect evaporator, the evaporation efficiency is greatly improved, the steam generated by the triple-effect evaporator is used for the second-effect evaporator, the steam generated by the second-effect evaporator is used for the first-effect evaporator, and the evaporation efficiency is greatly improved. Steam of the first-effect evaporator is used for the preheater, and the utili