What is the application of gas in heating furnaces
What is the application of gas in heating furnaces
The gas produced by the gas station is directly sent from the gas holder to the heating furnace of the second rolling workshop without pressure, with small pressure fluctuations. The gas pressure in front of the heating furnace is generally 2000-3000Pa. To ensure combustion efficiency, the heating furnace burner has been improved by replacing the original single fuel burner with a dual-purpose oil and gas burner. The heating furnace has a total of 17 burners, distributed as follows: 8 in the lower part of the heating section, 6 in the upper part, and 3 in the uniform heating section. Is the gas combustion capacity of a single burner 960m? 3/h, during normal production, only 8-10 burners can be opened to meet the rolling requirements. Use a dual-purpose burner for oil and gas, and adjust it appropriately with tar when the gas volume is insufficient.
Security measures
In order to achieve safe ignition of the heating furnace, detailed gas operating procedures have been formulated. Before ignition, a blasting test should be conducted to confirm that there are no errors before ignition can be carried out. At the same time, in order to reduce gas leakage, double gate valves are installed on the gas pipeline, butterfly valves and flat gate valves are installed in front of each burner, nitrogen blowing devices, eye valves, etc. Install fixed and mobile gas detectors in the heating furnace area to detect the concentration of CO in the surrounding environment at any time.
Application effect
The heating furnace burns gas, ensuring a uniform furnace temperature and ensuring the blackness of the furnace gas, avoiding local overheating and overburning of the steel billet when using heavy oil as fuel, and reducing the “black mark” of the steel billet heating. After gas combustion, there is less ash accumulation, which solves the problem of frequent blockage of the heat exchanger when burning heavy oil, and prolongs the operating cycle of the air heat exchanger at the rear of the heating furnace. The improvement of heating quality of steel billets has significantly reduced the phenomenon of roller breakage and rolling mill failure rate, extended the service life of pass and guide components, and increased the rolling mill operation rate by 1.2%.
During the heating process of steel billets, the oxidation and burning loss decrease by 1%, and when the rolling temperature exceeds 1100 ℃, the machine output increases; The reduction of rolling waste leads to varying degrees of improvement in the yield of various steel grades. The furnace temperature control and adjustment are convenient, reducing the labor intensity of pyrotechnic workers. The on-site work environment is good, without any running, dripping or leaking phenomena, and clean without black smoke.