Low-temperature methanol washing

The key operational aspects of low-temperature methanol washing include: 1. **Temperature control**: Maintaining the temperature inside the tower within the set low range to prevent excessive evaporation of methanol. 2. **Pressure control**: Maintain an appropriate pressure to prevent premature evaporation of methanol or safety risks caused by excessive system pressure. 3. **Level monitoring**: Ensure that the liquid levels at the top and bottom of the tower are appropriate. The inability to see the liquid level at the top of the tower may be due to an excessively low liquid level or a malfunction in the measuring equipment. It is necessary to check the level gauge and confirm the actual liquid level. 4. **Addressing oil accumulation at the bottom of the tower**: Oil present at the bottom of the methanol-water tower may be due to poor separation efficiency or stratification between oil and water. It is necessary to check whether the outlet at the bottom of the tower is blocked, adjust the operating parameters, or use an oil removal device to improve the efficiency of oil-water separation. 5. **Prevent separation of methanol and water layers**: Layering may occur during the extraction process by circulating methanol with water, which can be caused by uneven mixing or differences in specific gravity. This can be resolved by increasing the mixing intensity of the mixing equipment or adjusting the feed ratio. 6. **Periodic inspection and maintenance**: Regularly inspect the internal structure of the tower and the packing to prevent any form of blockage or wear from affecting operational efficiency. Regarding the issue you are currently facing, it is recommended to first check and calibrate all relevant measuring devices, optimize the control strategies, and perform system cleaning or maintenance if necessary. At the same time, reevaluate the mixing and separation processes to ensure uniform distribution of materials throughout the system. .