When designing or improving the furnace of an industrial furnace, a new energy-saving furnace should be selected as far as possible according to the requirements of the production process. Choose a suitable furnace structure to improve the degree of mechanization and energy efficiency. The energy-saving measures commonly used at present are:

(1) The use of a circular hearth instead of a box-shaped hearth can strengthen the uniform heat transfer effect of the hearth on the workpiece, reduce the heat dissipation of the furnace wall, and make the hearth form a heat exchange system. exchange. By adopting a reasonable furnace space and without increasing the volume of the furnace space, the furnace inner wall area is enlarged, and the furnace heat exchange is increased by increasing the heat exchange area to increase the heat efficiency.

(2) In the industrial furnace, a fan is installed in the furnace to enhance the convective heat transfer in the furnace. Especially for small heating furnaces, high-speed airflow can destroy the bottom layer of the furnace gas boundary that is stagnant on the surface of the workpiece to hinder heat transfer and interface reaction, which can shorten the heating time and accelerate the increase of the temperature of the workpiece.

(3) Furnace body sealing, including the sealing of all lead-out components in the furnace, furnace shell, furnace door, etc. If the furnace body is not tightly sealed, it will cause fire running and leakage everywhere, resulting in a large amount of energy waste, equipment burnout, and harsh environment. Therefore, the furnace body sealing directly affects the quality of the workpiece and energy consumption, and the sealing is also controlled by the atmosphere in the furnace. The essential. The emergence of refractory fiber products has created conditions for solving furnace body sealing, and industrial furnaces have achieved soft sealing.

(4) The industrial furnace adopts the refractory castable integrally poured heating furnace with the advantages of high strength, integrity, good air tightness, and long life.

(5) New furnace materials are used to optimize furnace lining structure. On the premise of ensuring the structural strength and heat resistance of the furnace, the furnace lining should maximize the heat preservation capacity and reduce the stored heat. Relying solely on increasing the thickness of the furnace lining to reduce the temperature of the outer wall of the furnace will not only increase the heat storage and cost of the furnace lining, but also reduce the effective utilization rate of the furnace bottom area accordingly. Refractory fiber, rock wool, etc. are used as the insulation layer, and lightweight bricks are used as the inner lining of the furnace body to reduce the heat storage loss of the furnace body, enhance the heat insulation of the furnace, and reduce the heat dissipation loss of the furnace wall.

(6) Coating high-temperature and high-radiation paint on the inner wall of the industrial furnace to strengthen the radiant heat transfer in the furnace and help to make full use of heat energy. Its energy-saving effect is 3% to 5%, which is a relatively advanced energy-saving method in the near future.