System for preparing sodium nitrate, magnesium sulfate and gypsum by using calcium-magnesium concentrated solution

• Main Authors: FANG JIN, GU CHUNGUANG, LENG WEIGUI, ZENG WEI, LI ENKE, LI QINGQING, HUANG SHIYING, LI ZHONGYAN
• Format: Patent
• Language: Chinese; English
• Published: 28.05.2024
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY

The utility model relates to the technical field of calcium and magnesium concentrated solution processing systems, in particular to a system for preparing sodium nitrate, magnesium sulfate and gypsum by using a calcium and magnesium concentrated solution. The utility model discloses a system for preparing sodium nitrate, magnesium sulfate and gypsum by using a calcium-magnesium concentrated solution. The system comprises a decalcification kettle, a first filter, a sedimentation kettle, a second filter, a first crystallization kettle, a second crystallization kettle, a conversion kettle, a third filter and a third crystallization kettle which are connected through pipelines, the decalcification kettle is used for receiving a calcium-magnesium concentrated solution, a mirabilite solution and lime; the first filter is used for filtering the decalcification feed liquid after the decalcification reaction; the settling kettle is used for receiving a first filtrate obtained after filtration by the first filter and