During the extraction and washing process, if the specific gravity is too high, the propeller-type stirrer is unable to mix everything evenly. What are some good solutions?

You encountered mixing issues during the extraction and washing process. Below is an evaluation of the solutions you listed along with other possible recommendations: 1. **Add baffles and an inner cylinder**: This is a common method to improve fluid mixing, especially within a tower. Baffles can break up large flow structures and enhance turbulent mixing between liquids. The inner cylinder can better guide the flow and avoid \"dead zones\". However, it may increase the power consumption of stirring. 2. **External circulation pump**: This method can improve mixing efficiency, but as you mentioned, the material tends to emulsify inside the pump, which may lead to difficulties in separation. If this option is considered, it may be necessary to select an appropriate pump and optimize the flow rate to reduce the risk of emulsification. 3. **Venturi jet mixing + stirring**: The high-speed fluid flow generated by the Venturi effect can enhance mixing, but this also increases the complexity of the system and its energy consumption. It is necessary to ensure the stability of the spraying and prevent material deposition or blockage. 4. **Centrifugal extractor**: This machine can achieve efficient mixing and separation in a short time. Its efficiency is usually much higher than that of ordinary mixers, but the initial investment and operating costs can be high. If the production scale is large enough and the economic benefits are sufficient, this is an excellent choice. In addition, the following suggestions are available: 5. **Optimize the mixer design**: Consider using different types of mixers, such as anchor, paddle, or turbine types, or try various mixing speeds and directions to see if better mixing results can be achieved. 6. **Use of static mixers**: It has no moving parts; mixing is achieved by using specially designed elements to create laminar flow in the fluid. This method is suitable for high-flow systems and has low energy consumption. 7. **Consider using ultrasonic mixing**: Ultrasonic waves can generate tiny bubbles to enhance the mixing of materials. But make sure the material is not damaged by ultrasonic waves. Finally, regardless of which option is chosen, it is recommended to conduct small-scale tests to verify its feasibility, and then proceed with scaling up or putting it into production based on the results. .