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    Home > Active Ingredient News > Drugs Articles > What are the operation methods and precautions of hot air circulation oven

    What are the operation methods and precautions of hot air circulation oven

    • Last Update: 2019-08-21
    • Source: Internet
    • Author: User
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    The hot air circulation oven is now more and more indispensable in the industrial drying production The working principle of the hot air circulation oven is to use the Saturday fan circulation air supply mode, through the heater to heat the cold air into the hot air, and then the hot air through the air duct to conduct uniform and reasonable heat transfer for the materials, and finally make the materials dry It is very important to use the hot air circulation oven correctly The operation procedures of the hot air circulation oven are as follows: (1) the drying oven is used for drying, melting or other heating of the sample The high working temperature is 300 ℃ The drying oven works under the condition that the ambient temperature is not more than 40 ℃ and the relative humidity of air is not more than 85% (2) use a special plug and socket, and use a wire twice as thick as the power line to ground Check the electrical insulation performance before use, and pay attention to whether there is open circuit, short circuit and leakage (3) put the thermometer on the box, turn on the power supply to adjust the temperature control knob to the set temperature, and check whether the reading of the thermometer is consistent with the set value when the AC contact switch is just disconnected If there is any discrepancy, make fine adjustment until the constant temperature is consistent with the set temperature (4) open the top or bottom vent to remove the moisture in the box (5) the large average load of the steel plate of the test object is 15kg Do not place it too heavy or too dense, leave a gap, and do not place the test object on the bottom plate of the studio (6) it is strictly prohibited to put inflammable and volatile materials in the drying box to prevent explosion (7) turn on the power, the green indicator light is on, turn on the blower switch, the blower motor operates, turn on the heating power, and the drying oven will enter the working state (8) when working, the box door should not be opened frequently to avoid affecting the constant temperature field (9) there is no overtemperature protection device for this equipment, so special personnel shall be assigned to monitor the temperature in the box during operation Once the temperature is out of control, the power shall be cut off in time for inspection to avoid accidents When the operator uses the hot air circulation oven, if the operation is improper, it may lead to equipment failure or explosion accident; if the matters are in the early stage, they are all preventive Next, I will share with you the precautions for using the hot air circulation oven: 1 Fully drain the sample first It is forbidden to put the sample with water-based quality into the box for drying And the sample can not be placed on the inner plate of the box; it is forbidden to fill the box with the contents; there must be a space between the samples, and the induced air exhaust device of the hot air circulation oven should be installed according to the requirements of the manual 2 Preheat the box to the drying temperature and enter the constant temperature stage, and always keep the blower in operation Close the power supply of the heater, open the door of the oven, put the sample into the hot air circulation oven, and use the residual heat to volatilize most of the mixed xylene gas Do not heat the heater during preheating 3 During the preheating process, these gases are directly extracted from the outside of the tank by the air extraction pipeline, and the time shall be maintained for half an hour Or half an hour later, open the door of the hot air circulation oven to release the volatilized mixed xylene gas 4 Power on the heater and monitor the temperature rise process of the temperature control instrument until the temperature specified in the process is stable.
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