Safe operation procedure and maintenance of hot air circulation oven

Safety operation procedure of hot air circulation oven 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 a "clearance certificate" 2 Check whether the electric switch, steam supply system and valve of the hot air circulation oven are in good condition, whether they are loose or leaking, and use them only after they are in good condition 3 Open the door of the oven, 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 After loading, push the drying car bracket into the oven and close the door of the oven 4 Turn on the power switch, turn on the steam valve, start heating in the box, then turn on the steam outlet valve, exhaust the air and residual water in the pipeline, and then turn off Turn on the fan switch, circulate the hot air in the box, heat for 15 minutes, then turn on the dehumidification valve for 1 minute, and discharge the humidity in the box After that, every 15 minutes of drying, the humidity will be discharged for 1 minute Close the dehumidification valve after the completion of 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 red light of the temperature controller is on, and the temperature control range is 50 ℃ - 140 ℃), close some steam inlet valves, keep the temperature in the oven within the set time limit, and after drying, close the steam inlet valve, close the fan and power supply 6 In the process of drug drying, turn over the drug according to the process requirements When turning over, first close the steam inlet valve, stop heating, turn off the fan, stop the hot air circulation, turn off the power supply, then open the door of the oven and pull out the drying car bracket for turning over After the operation, push the drying car into the oven, close the oven, then open the steam inlet valve, continue heating, turn on the fan for hot air Cycle to the end of drying 7 After drying, open the door of the oven 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 for weighing record 8 It is strictly prohibited to put inflammable and explosive materials into the box for drying to avoid explosion 9 During the operation, pay attention to observe the temperature change in the box 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 In the production process and after production, the hot air circulation oven operator shall check and maintain the equipment 2 Check whether the electrical switches, lines and indicator lights of the equipment are in good condition, and whether the temperature control system is normal Once the temperature control is found to be out of order, shut down the equipment for maintenance immediately 3 Check whether all pipelines of the steam system are unblocked and whether the valve leaks 4 Check whether the equipment, instruments and components are in good condition The fan shall be maintained regularly according to the equipment maintenance procedures If there is abnormal sound during the operation of the fan, it shall be stopped and maintained immediately If the bearing is damaged, it shall be replaced with a new bearing and lubricated with calcium based grease 5 When the hot air circulation oven is out of use, the power supply shall be cut off to ensure safety 6 Maintenance records of hot air circulation oven shall be made