Coal chemical high salt wastewater can be subjected to salt separation. In response to the water quality characteristics of high salt wastewater from coal chemical industry, a comprehensive treatment method combining membrane salt separation and thermal salt separation is generally adopted.
Specifically, membrane based salt separation is mainly achieved through technologies such as ultrafiltration, nanofiltration, and reverse osmosis membranes. These technologies are widely used in the field of coal chemical wastewater treatment, where reverse osmosis membrane filtrate can be reused for production, while membrane filtration concentrate belongs to high salt wastewater and needs further treatment. The nanofiltration membrane method can separate divalent salts by evaporating and crystallizing sodium chloride and sodium sulfate after separation. However, for wastewater containing three types of salts: sodium chloride, sodium nitrate, and sodium sulfate, since both sodium chloride and sodium nitrate are monovalent salts, it is difficult to separate them using nanofiltration membrane method. Therefore, it is necessary to combine thermal salt separation for treatment.
Thermal salt separation is mainly based on the salt co saturation curve, evaporating and separating different salts at different temperatures. Through the evaporation crystallization process, industrial grade sodium chloride, sodium sulfate, and sodium nitrate crystalline salts can be recovered. In practical operation, it is necessary to select the appropriate combination of membrane and thermal salt separation processes based on the specific composition and conditions of the wastewater to achieve the best salt separation effect.
In addition, in recent years, some new technologies and methods have been applied to the desalination treatment of high salt wastewater in coal chemical industry. For example, Xinjiang Tianye Group Huihe New Materials Co., Ltd. has introduced the freezing crystallization salt separation process and successfully built a salt separation crystallization device through independent conversion and process combination, achieving the separation and recovery of industrial grade high-purity sodium sulfate, sodium chloride and other products from high salt wastewater.
The high salt wastewater from coal chemical industry can be subjected to salt separation. By using a suitable combination of membrane and thermal salt separation processes, as well as continuously introducing and innovating new technologies and methods, the resource utilization and standard discharge of wastewater can be achieved. Baihuipu Environmental Protection is a manufacturer of one-stop services for research, production, and sales. It has multiple sub factories and branches, serving multiple leading domestic and foreign enterprises. It has passed ISO9001 system certification and has been providing professional solutions for many years. We offer one-stop services including on-site survey, formulation of plans, equipment production, installation, and after-sales service, with a 10 second quotation, a 30 minute solution, and 24-hour on-site service. For evaporation equipment, find Baihuipu Environmental Protection!
