Coal-fired furnaces have been used for the longest time and have the largest number in the enamel industry. Due to serious pollution, they have been gradually phased out and replaced by electric furnaces, gas furnaces and oil furnaces that use clean energy. After years of introduction, digestion and absorption, Thermal efficiency is constantly improving. Today, Xiaonuo focuses on the energy saving methods of enamel gas furnaces to help enamel manufacturers optimize production efficiency and save costs:

1. The radiant tube furnace should pay attention to the layout, installation position and height of the radiant tube, the maximum angle coefficient that is conducive to radiation, and the uniform radiation heat transfer to the product, so that the upper and lower temperature differences tend to be consistent;

2. Increase the length of the preheating zone, use high-temperature flue gas to increase the temperature of enamel products entering the furnace, and improve thermal efficiency to save energy;

3. Using high-quality thermal insulation materials, the radiant tube furnace can use the lining of all fiber cotton, and the muffle furnace can use the composite furnace wall;

4. Spray high-temperature energy-saving paint on the inner wall of the firing chamber to increase the blackness of the inner wall. According to the principle of thermal radiation, the furnace wall with large blackness absorbs more heat, the temperature is easy to increase, and the radiation and effective radiation of the furnace wall itself increase;

5. Improve the tightness of the furnace body, especially in the muffle furnace. The loose furnace body not only wastes energy, but also brings hidden dangers to production safety;

6. The automatic control system of the fuel proportional valve should be used to control the excess air coefficient, so as to avoid wasting fuel and losing heat;

7. Use the waste heat of flue gas to increase the temperature of combustion air through the heat exchanger. Experience has shown that when the air is preheated to 200°C, the excess air volume can be reduced by 12% to 13%, the furnace temperature is significantly increased, and the emission of harmful gases is reduced, which is conducive to environmental protection.