1、 Preparation before operation
1. Equipment and raw material inspection
Confirm that all components of the equipment (rotor, liquid distributor, condenser, reboiler, etc.) are intact and free of debris blockage inside.
Check the normal supply of water, electricity, gas, steam and other public utilities to ensure the availability of instruments and safety facilities.
The raw materials must meet the process requirements, and the storage and transportation of the feed and products should be coordinated in advance.
2. Parameter setting and debugging
Set parameters such as speed, feed rate, temperature, pressure, etc. based on the properties of the material to ensure that the feed temperature is close to the bubble point state.
Debug the liquid distributor to ensure that the liquid enters the rotor cavity evenly.
2、 Start and Run
1. Start the process
Pressurization/depressurization: Adjust the equipment to the normal operating pressure range.
Heating up: Slowly heat the tower kettle to the process temperature to avoid local overheating.
Feed: Continuously add raw materials from the middle of the tower and control the feed amount to be stable.
2. Gas liquid flow control
The gas phase enters the outer edge of the rotor from the outer chamber of the equipment, while the liquid phase is injected from the distributor at the center of the rotor and thrown out by centrifugal force, forming a counter current contact.
Start the condenser and reboiler, adjust the flow of refrigerant and heat source, and maintain the temperature gradient at the top/bottom of the tower.
3. Reflux and extraction
After condensation of the steam at the top of the tower, some of the liquid is returned to the top as reflux, while the rest is extracted as distillate.
Monitor the liquid level of the tower kettle, extract heavy components in a timely manner, and maintain stable liquid level.
3、 Operation monitoring and adjustment
1. Key parameter monitoring
Real time tracking of parameters such as tower pressure, temperature, speed, gas-liquid flow rate, etc. Any abnormal fluctuations should be promptly analyzed for their causes.
Regularly sample and analyze the composition of the distillate and kettle liquid, adjust the reflux ratio or feed position to optimize the separation effect.
2. Fault handling
Tower pressure fluctuation: Check for changes in feed composition, steam volume fluctuations, or tray blockages, and adjust operating conditions accordingly.
Decreased mass transfer efficiency: It may be due to packing blockage or uneven liquid distribution, and the distributor needs to be shut down for cleaning or re adjusted.
4、 Parking operation
1. Normal parking
Gradually reduce the feed amount, stop heating and reduce the speed, and turn off the condenser and reboiler after the temperature drops to a safe range.
Empty the materials inside the tower, clean the equipment, and replace the inert gas.
2. Emergency stop
In case of equipment leakage, overpressure or abnormal vibration, immediately cut off the power and material supply, and activate the emergency plan.
5、 Maintenance and Cleaning
1. Regularly check the wear of the rotor, clean the surface scaling of the packing, and ensure mass transfer efficiency.
2. Use low-pressure water or chemical cleaning agents to rinse the equipment to avoid mechanical damage.
6、 Operation precautions
1. Avoid long-term overload operation and prevent excessive pressure drop in the packing layer from increasing energy consumption.
2. When handling heat sensitive materials, it is necessary to strictly control the residence time to reduce the risk of degradation.
3. During the operation, valve adjustment should be done frequently and slowly to avoid system instability caused by sudden parameter changes.
4. Through the above methods, the supergravity distillation machine can achieve efficient and low-energy continuous separation, while ensuring operational safety and stability.