The transformation of the combustion system pipeline of the trolley furnace was carried out due to the aging of the pipeline and the lack of air pressure inside the furnace after long-term use. Therefore, the pipeline was relocated, and oil delivery metal hoses, gas supply metal hoses, fuel control valves, air compressors, and compressed air pipeline systems were added. The transformation of the combustion system pipeline of the trolley furnace was carried out due to the aging of the pipeline and the lack of air pressure inside the furnace after long-term use. Therefore, the pipeline was relocated, and oil delivery metal hoses, gas supply metal hoses, fuel control valves, air compressors, and compressed air pipeline systems were added. A new fuel spray burner is adopted, which has a pressure atomization combined with high-pressure internal hybrid atomization mode, so that the fuel atomization particles are fine. It can achieve Z good end flow mixing with combustion air to achieve efficient combustion. Not easy to block, not coking, easy to control the length, shape, temperature, etc. of the flame, burns thoroughly, and does not emit black smoke. The furnace has undergone a standardized baking process and one month of production practice monitoring, which shows that the transformation is very successful, meeting or even exceeding the requirements of the design transformation goals. Objective requirement: (1) Increased production volume and improved product quality. After the renovation, the furnace has good insulation function, fast heating time, short processing cycle, increased output, and significantly reduced temperature difference inside the furnace, ensuring reliable product quality. (2) Reduced costs. When the original trolley furnace had a loading capacity of 5 tons, it took 7 hours to heat up to 850 ℃, with a fuel consumption of 64.5 kgh. Now, under the same conditions, it only takes 5 hours to heat up to 850 ℃, with a fuel consumption of 48 kgh. This shows that the heating time has been shortened by 2 hours, saving 129 kg of fuel. During the heating period, the new furnace saves 16.5kgh of fuel compared to the original furnace. Calculated at 5 hours per furnace, 82.5kg of fuel can be saved. As a result, a total of 211.5kg (129kg+82.5kg) of fuel can be saved per furnace, significantly increasing the total power output. It can be seen that the fuel saving benefits are very obvious.