一种卤水联产碳酸锂和氯化锂的装置系统

Abstract

本实用新型涉及卤水制备锂产品技术领域，其为了解决现有采用卤水提锂并制备锂产品，采用的是单产品独立生产装置系统，无法经济地满足碳酸锂、氯化锂同时产出的问题；本实用新型提供了一种卤水联产碳酸锂和氯化锂的装置系统，包括卤水缓存单元和沉锂单元，还包括芒硝缓存单元、净化单元、蒸发单元、析钠单元、第一离心机和重结晶单元；卤水缓存单元和芒硝缓存单元与净化单元的进料端连通；净化单元的出料端与蒸发单元连通；蒸发单元与析钠单元连通；析钠单元的排液端与沉锂单元连通；析钠单元的排渣端与重结晶单元连通；本实用新型既能实现碳酸锂和氯化锂在同一生产系统联产制备，且有效利用了钠资源，经济且实用。

Claims

1. A device system for co-production of lithium carbonate and lithium chloride from brine, comprising a brine storage unit and a lithium precipitation unit, characterized in that: It also includes a sodium sulfate buffer unit, a purification unit, an evaporation unit, a sodium precipitation unit, a first centrifuge, and a recrystallization unit; the brine buffer unit and the sodium sulfate buffer unit are connected to the feed end of the purification unit; the discharge end of the purification unit is connected to the evaporation unit; the evaporation unit is connected to the sodium precipitation unit; the discharge end of the sodium precipitation unit is connected to the lithium precipitation unit; and the slag discharge end of the sodium precipitation unit is connected to the recrystallization unit.

2. The system for co-producing lithium carbonate and lithium chloride from brine according to claim 1, wherein: The recrystallization unit includes a recrystallization tank (13) and a single-effect evaporator (14); the first centrifuge is connected to the feed end of a mixing tank (15) through a feed branch pipe; the feed end of the mixing tank (15) is connected to a water supply pipe; the discharge end of the mixing tank (15) is connected to the feed end of the recrystallization tank (13); the discharge end of the recrystallization tank (13) is connected to the single-effect evaporator (14).

3. The system for co-producing lithium carbonate and lithium chloride from brine according to claim 2, wherein: Both the feed pipe and the water supply pipe are equipped with flow valves.

4. The system for co-producing lithium carbonate and lithium chloride from brine according to claim 3, wherein: The discharge end of the single-effect evaporator (14) is connected to the first centrifuge (10).

5. The system for co-production of lithium carbonate and lithium chloride from brine according to any one of claims 1 to 4, wherein: The purification unit includes a primary purification reactor (1) and a resin tank (3); the brine buffer unit and the sodium sulfate buffer unit are both connected to the feed end of the primary purification reactor (1); the discharge end of the primary purification reactor (1) is connected to the resin tank (3).

6. The system of claim 5, wherein: A first filter (2) is provided between the primary purification reactor (1) and the resin tank (3).

7. The system for co-producing lithium carbonate and lithium chloride from brine according to claim 5, wherein: The purification unit also includes a secondary purification reactor (4) and a desulfurization reactor (6); the discharge end of the resin tank (3) is connected to the secondary purification reactor (4); the secondary purification reactor (4) is connected to the desulfurization reactor (6).

8. The system of claim 7, wherein: A second filter (5) is provided between the secondary purification reactor (4) and the desulfurization reactor (6).

9. The system for co-producing lithium carbonate and lithium chloride from brine according to claim 7, wherein: A third filter (7) is provided between the desulfurization kettle (6) and the evaporation unit.

10. The system for co-producing lithium carbonate and lithium chloride from brine according to claim 5, wherein: A mixing tank (16) is provided between the first centrifuge (10) and the lithium deposition unit.

Images