Annealing furnaces aim to improve uniformity of the internal temperature field, ensure product hardness meets process requirements, enhance product quality, and increase overall production efficiency. Considering furnace characteristics, causes of temperature non-uniformity, retrofit costs, interchangeability, and utilization, the following energy-saving measures are emphasized:
1. Furnace Structure and Insulation Improvements
- Reinforce or repair furnace doors and insulation layers to prevent heat loss caused by air leaks or damaged insulation.
- Proper sealing ensures better retention of heat, reducing energy consumption during operation.
2. Temperature Uniformity Optimization
- Use multi-point temperature monitoring instruments to measure temperature at different positions within the furnace.
- Adjust product stacking structures to achieve the most uniform temperature field that meets process requirements.
- Compensates for uneven airflow caused by single-duct forced air circulation.
3. Furnace Configuration for Energy Efficiency
- Material Handling: Front and rear loading/unloading with chain-belt carrier frames running through the furnace for smooth material transport.
- Hot Air Circulation: Large-flow fans with impellers installed inside the furnace; motors fixed outside on the side of the furnace, driven by belts to reduce energy losses.
- Heat Exchange: Finned-tube heat exchangers placed within hot-air circulation ducts; thermal oil flow is regulated through adjustable valves based on temperature feedback.
- Temperature Control: Heat exchanger oil flow is adjusted automatically according to temperature signals to maintain optimal hot air temperature, ensuring energy is not wasted.
Summary:
By strengthening insulation, optimizing airflow, and using intelligent heat exchange and temperature control systems, annealing furnaces can significantly reduce energy consumption while maintaining product quality and uniformity.