1、 Introduction: Technical Challenges and Industry Needs in High Salt Wastewater Treatment;  

      -Sources and environmental risks of high salt wastewater (chemical, pharmaceutical, printing and dyeing industries);  

      -The core position of evaporative crystallization process and its correlation with zero emission targets;  

      -Research significance: The influence of impurity migration law on process efficiency, equipment life, and product purity;  

      2. Study on the Mechanism of Impurity Migration in Evaporation Crystallization Process;  

      one Types and distribution characteristics of impurities;  

      -The complexity of coexistence between inorganic salts (NaCl, Na ₂ SO ₄, etc.) and organic pollutants;  

      -Migration characteristics of difficult to treat impurities such as heavy metal ions and silicates;  

      two Factors influencing migration patterns;  

      -The mechanism of temperature gradient and evaporation rate on crystallization process;  

      -Dynamic regulation of impurity precipitation pathways by solution pH and ion concentration;  

      three The negative impact of impurity enrichment on the process;  

      -Scaling, blockage issues and equipment energy efficiency decline;  

      -Obstacles to resource utilization caused by insufficient purity of crystalline salts;  

      III. Breakthrough direction of zero emission key technologies   

      one Collaborative optimization of multi effect evaporation and mechanical vapor recompression (MVR);  

      -Energy efficiency improvement and phased enrichment control of impurities;  

      -Innovation points of Baihuipu Environmental Protection in MVR system design (such as the application of anti scaling materials);  

      two Separation and Resource Utilization Technology of Mixed Salts;  

      -Stepwise crystallization method for gradient separation of salts and impurities;  

      -Analysis of Impurity Retention Effect in Membrane Separation Coupled Evaporation Process;  

      three Terminal residual liquid treatment technology;  

      -Thorough degradation of trace organic matter by drying incineration process;  

      -The technology integration solution of Baihuipu Environmental Protection in harmless treatment;  

      4. Process Optimization and Future Development Trends;  

      -Application of Intelligent Control System;  

      -Real time parameter control strategy based on impurity migration model;  

      -Research and development of green chemical agents;  

      -Targeted intervention of scale inhibitors and crystal modifiers on migration pathways;  

      -Policy driven upgrade of zero emission standards;  

      -How does Baihuipu's environmental protection technology respond to the national "dual carbon" goals and circular economy policies;