Resource utilization method and device of RO concentrate

• Main Authors: YANG JIHENG, BAI ZUGUO, DANG JIANBING, CHEN DAOKANG, FAN KEYIN, ZHANG XU, SUN GUIHUA, YUN JIANJUN, PENG WENBO
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2020
• Subjects: APPARATUS THEREFOR; CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS; INORGANIC CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a resource utilization method and a resource utilization device for RO (reverse osmosis) concentrate, in particular to a membrane-method resource utilization method and a membrane-method resource utilization device for the RO concentrate of papermaking wastewater. The method comprises the following steps: 1, carrying out impurity-removing cation treatment on the RO concentrate, and filtering by using a microfiltration/ultrafiltration membrane to obtain purified saline water containing organic pollutants; 2, carrying out deep impurity cation removal treatment on the purified brine by using resin to further reduce the cation content; 3, carrying out salt separation treatment on the resin effluent through a nanofiltration membrane to realize separation of mixed salt;4, carrying out evaporative crystallization treatment on the nanofiltration concentrate to obtain sodium sulphate; 5, carrying out reverse osmosis and electrodialysis concentration treatment on the nanofiltration penetrating