hot air circulation oven operation and maintenance
The hot air circulation oven uses the forced ventilation function, and there is an adjustable air plate in the box, which can make the materials dry evenly. Maybe we don't know it very well. So, let's briefly introduce the safe operation procedure and the later maintenance of the hot air circulation oven.
hot air circulation oven safe operation procedure :
1. Before each use, the operator of hot air circulation oven shall check whether the inside and outside of the oven and the workshop are clean, and there shall be "site clearing certificate".
2. Check whether the electric switch, steam supply system and valve of hot air circulation oven are in good condition, whether there is looseness or leakage, and use it only after the inspection is correct.
3. Open the oven door, pull out the drying car bracket, evenly spread the drugs to be dried in the tray, and place them on the bracket from top to bottom in turn. After loading, push the bracket into the box and close the door.
4. Turn on the power switch, open the steam valve, the box begins to heat up, then open the steam outlet valve, exhaust the air and residual water in the pipeline, and then close it. Turn on the fan switch, and the hot air in the box circulates. After heating for 15 minutes, open the dehumidification valve to exhaust the moisture for 1 minute, and then exhaust the moisture for 1 minute every 15 minutes of drying. Close the dehumidification valve after dehumidification.
5. Set the temperature and drying time in the hot air circulation oven according to the process requirements. When the temperature in the oven reaches the set value, the temperature control range is 50 ℃ - 140 ℃, and part of the steam inlet valve is closed. When the temperature reaches the set time limit, the steam inlet valve is closed, the fan and power supply are turned off.
6. During the drying process, the medicine should be turned over according to the process requirements. When turning, the steam inlet valve should be closed first, the heating should be stopped, the fan should be closed, the hot air circulation should be stopped, the power supply should be turned off, and then the oven door should be opened to pull out the drying car bracket for turning over. After the operation is completed, the drying car will be pushed into the box, the box will be closed, and the steam inlet valve will be opened to continue heating, and the fan will be opened for hot air circulation To the end of drying.
7. After drying, open the oven door and pull out the drying car, put the dried medicine into a clean container, and mark the contents after sealing. Send the dried medicine to the next process and make weighing record.
8. It is strictly forbidden to dry inflammable and explosive materials in the box to avoid explosion.
9. Pay attention to observe the temperature change in the box during operation. Once the temperature control fails, stop the machine immediately for inspection and maintenance.
10. After production, clean the hot air circulation oven and workshop according to the cleaning procedure, and fill in the equipment operation record.
hot air circulation oven maintenance:
1. During and after the production, the hot air circulation oven operator should check and maintain the equipment.
2. Check whether the electrical switch, circuit and indicator light of the equipment are in good condition, and whether the temperature control system is normal. Once the temperature control fails, the machine shall be shut down for maintenance immediately.
3. Check whether the pipelines of the steam system are unblocked and whether the valves have leakage.
4. Check whether the equipment, instrument and components are in good condition. The fan should be regularly maintained according to the equipment maintenance procedures. The fan should be operated normally. If there is abnormal sound, it should be stopped and repaired immediately. If the bearing is damaged, it should be replaced with a new bearing and lubricated with calcium based grease.
5. When the hot air circulation oven stops using, the power supply should be cut off to ensure safety.
6. The maintenance record of hot air circulation oven should be made.