Support at the bottom of the heating furnace tube
Thread Content
The furnace tubes in our heater are U-shaped, with a support of 200 mm at the bottom (as shown in the diagram). Now, the fire-resistant layer at this support area has expanded (also as shown in the diagram), causing the furnace tubes to vibrate. How do other users reinforce them?
As can be seen from the node diagram, the supports have not taken root. During fire protection measures, the fireproof layer buries the support elements; as a result, the furnace tubes vibrate or shake during operation, and over time this leads to the situation shown in the image. From a design perspective, in order to protect the fireproof layer (and thus the housing), it is better to shorten the support rods and weld a circular or square pad (with dimensions similar to those of the U-shaped tube) to their ends, with the pad resting on top of the fireproof layer. For reference only.
If the furnace tube has a suspended structure, it is recommended to provide support on the outside at the bottom, adding guide sleeves that are welded to the furnace floor; 304 material should be used for these guide sleeves. For example: the bottom support is made of φ60 round steel, and a guide sleeve of φ89x8 can be added to prevent horizontal movement of the furnace tube.