How to ensure that the oxygen content in the oven is less than 20PPM?

During the operation, ensuring that the oxygen content in the dust-free and oxygen-free oven is less than 20PPM is a crucial step, because it is directly related to the protection of the materials and the maintenance of quality during the baking process.

1. Pre-preparation stage
Oven inspection: Before operation, the dust-free and oxygen-free oven needs to be fully inspected to ensure that it is well sealed and has no air leakage. At the same time, check whether the gas pipeline and valve are intact to ensure the normal supply of inert gas.
Cleaning and drying: The interior of the dust-free and oxygen-free oven is thoroughly cleaned and dried to remove possible impurities and moisture, which may affect the monitoring and control of oxygen content.

2. Inert gas filling
Gas selection: According to the use requirements of the dust-free and oxygen-free oven, select a suitable inert gas, such as nitrogen (N2) or carbon dioxide (CO2). These gases are chemically stable, do not react with materials, and can effectively prevent oxidation of materials.
Gas filling: Inert gas is filled into the interior of the dust-free and oxygen-free oven through a special gas filling system. During the filling process, the filling speed and pressure should be controlled to ensure that the gas is evenly distributed and avoid the formation of local high concentration areas.
Air replacement: While filling the inert gas, the air in the oven is discharged through the exhaust system. This process needs to be repeated until the oxygen content in the dust-free and oxygen-free oven is reduced to below the set value.

III. Oxygen content monitoring and control
Monitoring equipment: Install high-precision oxygen concentration monitoring equipment such as electrochemical oxygen sensors or optical oxygen sensors inside the dust-free and oxygen-free oven. These devices can monitor the oxygen content in the oven in real time and feed the data back to the control system.
Monitoring accuracy: According to the specific requirements of the dust-free and oxygen-free oven, select monitoring equipment with appropriate accuracy. For example, for ovens that require an oxygen content of less than 20PPM, equipment that can accurately measure the oxygen content within this range should be selected.
Monitoring location: Select a suitable location inside the dust-free and oxygen-free oven to install the monitoring equipment to ensure that the oxygen content in the oven can be fully and accurately reflected. Generally, the monitoring equipment should be installed in a representative position inside the oven, such as the central area or an area where the gas flows faster.
Control system: According to the feedback signal of the monitoring equipment, the control system automatically adjusts the flow rate of the inert gas and the exhaust volume of the oven to maintain the oxygen content in the oven below the set value. The control system can use advanced automation technology and algorithms to achieve precise control and rapid response.
Set value: According to the use requirements of the dust-free and oxygen-free oven and the characteristics of the material, set the appropriate oxygen content set value. For example, for some sensitive materials, it may be necessary to control the oxygen content at a lower level. The set value should maximize production efficiency while ensuring that the material is not oxidized.
Alarm and protection: When the oxygen content in the dust-free and oxygen-free oven exceeds the set value, the control system should trigger the alarm device to remind the operator to take measures. At the same time, the control system should also automatically start protection measures, such as shutting down the heater, exhaust valve, etc., to prevent the oxidation of the material.

IV. Operation process and personnel training
Operation process: Develop a detailed operation process and clarify the operation steps and precautions for each step. Operators need to strictly follow the process to ensure that each step is correct.
Personnel training: Provide professional training to operators to make them familiar with the working principle, operation method and safety precautions of dust-free and oxygen-free ovens. At the same time, the training should also include emergency handling and troubleshooting to improve the operator's ability to respond and solve problems.

V. Regular maintenance and inspection
Equipment maintenance: Regularly maintain and service the oven, check the working status of gas pipelines, valves, monitoring equipment and other components to ensure their normal operation.
Gas detection: Regularly detect the gas in the oven to ensure that it meets the use requirements. If the gas quality is found to be degraded or does not meet the requirements, it needs to be replaced or processed in time.