1、 Preliminary preparation
1. Equipment inspection and cleaning
Check the integrity of the mixing tank, confirm that there is no damage or contamination, and rinse the inner wall with distilled water until there is no residue.
Select the appropriate size of the mixing tank based on the preparation amount (such as small or pilot tanks for laboratory use).
Prepare raw materials, solvents, measuring tools, and protective equipment (such as gloves and goggles).
2. Disinfection treatment
Disinfect the tank, inlet and outlet pipelines, and valves to ensure a sterile environment.
2、 Preparation process
1. Material addition
Accurately weigh solid or liquid raw materials according to the formula, prioritize adding solid materials, and then slowly pour in liquid solvents.
The amount of material loaded should not exceed 80% of the tank capacity to avoid liquid overflow during mixing.
2. Stir and mix
Start the magnetic stirring or impeller stirring device to thoroughly mix the materials to a uniform state; If heating is required, steam (pressure ≤ 0.05MPa) is introduced through a jacket or coil.
Adjust parameters such as temperature and pH, and monitor in real-time until the experimental requirements are met.
3. Defoamer and static state
After turning off the stirring, let it stand for 5-10 minutes until the bubbles dissipate naturally.
3、 Drainage and storage
1. Discharge operation
Release the liquid through the bottom outlet and use a clean container to receive it; When continuous drainage is required, the booster valve can be opened to assist in pressure output.
Use a glass rod to drain the liquid during transfer to avoid splashing.
2. Storage management
The prepared liquid should be sealed and stored, with labels indicating the name, concentration, preparer, and date.
Avoid high temperature or strong light environment during storage, and regularly check the sealing.
4、 Cleaning and maintenance
1. Cleaning steps
Immediately clean the inner wall with a mild cleaning agent and a soft cloth after use, with a focus on removing residue from mixing dead corners.
Turn on the automatic cleaner (pressure 0.3-0.5MPa) during flushing, and clean it in a cycle of clean water, alkaline water, and boiling water in sequence.
2. Equipment maintenance
Regularly check the operation status of the mixing device and the aging of the sealing components. If it is not used for a long time, the jacket should be drained of accumulated water.
3. Precautions
Safety protection: Wear protective equipment when handling strong acids and corrosive liquids, and dispose of waste liquids after detoxification.
Temperature control: Avoid excessive temperature difference during heating/cooling, which may cause deformation of the tank body. The steam valve needs to be operated by a dedicated person.
Accuracy calibration: Regularly verify the accuracy of the liquid level gauge and pressure gauge to ensure the accuracy of the configuration.
(Note: The operation process needs to be adjusted according to the specific type of mixing tank, such as the operation details of magnetic stirring tanks and fixed tanks may be different.)