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How to cool down the overheated high temperature tube furnace

Cooling method for overheated high-temperature tube furnace, let's learn together!

Firstly, Conventional physical heat dissipation method

Open the furnace cover to dissipate heat: For some high-temperature tube furnaces with openable furnace covers, after the experiment, open the furnace cover to allow the heat to dissipate naturally into the surrounding environment. As discussed in the case of the China Mechanical Community, the furnace can be naturally cooled after opening the furnace cover, but the cooling speed of this method is slow. In this case, natural cooling takes more than 2 hours.

Add ventilation equipment: Adding ventilation equipment such as centrifugal fans to the furnace mouth can speed up air flow and thus accelerate heat dissipation. In the above case, after adding a centrifugal fan to the furnace mouth, the cooling time was shortened from about 2 hours and 40 minutes to 1 hour and 30 minutes.

Secondly, Cooling method for special tube furnace design

Sliding tube furnace design: Some sliding tube furnaces are designed for rapid heating and cooling. During operation, the constant heating zone can be pushed directly away from the sample, so that the sample is directly exposed to the room temperature environment to achieve a rapid cooling effect. This equipment can achieve a heating and cooling rate of 15℃/s in a vacuum or inert gas environment.

Thirdly, Follow the operating specifications to assist cooling

Control the heating and cooling rate: When using a tubular furnace, the heating rate should be controlled to no more than 10 degrees per minute and the cooling rate should be controlled to no more than 15 degrees per minute. Avoid rapid heating and cooling, which will help the furnace body to cool down steadily and maintain performance, and prevent damage to the furnace tube lining and heating wire due to rapid temperature changes.

Pay attention to the temperature when taking out the product: After the product is heat treated, a small amount of process atmosphere should continue to be introduced and the temperature should be lowered until the temperature in the furnace is lower than the process requirements, and when taking out the product, wait until the furnace temperature is lower than 100℃. Following this specification, the furnace body can be cooled down in an orderly manner.

Fourthly, Heat dissipation method of furnace structure

Double-layer air-cooling structure: Some tubular furnaces use a double-layer air-cooling structure. This design can take away the heat generated by the furnace body through air flow, thereby assisting the furnace body in cooling down.

Pre:Common faults of vacuum furnace and their solutions
Next:Temperature control technology of tube furnace

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