Flue Gas Blowback System Of Regenerative Heating Furnace And Its Numerical Simulation

During the normal operation of regenerative heating furnace,the hocket of gas supply and smoke exhaust process are controlled by the gas switching valves on both sides of the furnace.The gas in the public pipeline is always discharged into the atmosphere,when the gas supply state shifts to the smoke exhaust state.According to the statistics of actual production data,the per ton of steel gas emissions caused by the reversal of the regenerative heating furnace is as high as 12 Nm3,and the annual amount of gas emissions in the country is about 7.5 billion Nm3,which pollutes the environment and wastes a lot of high-quality energy.Considering the issue of off gas in regenerative heating furnace process,the technology named “self-produced gas explosion blowback” was proposed.Then based on this technology,the flue gas blowback system was well designed,and sequence control of the valves and safety interlocking mechanism were carried out.In order to guarantee reasonable parameter setting in the actual gas blowback system process,the numerical simulation of this process was carried out by determining the values of purge time and purge speed.The results indicate that the residual CO concentration in public pipe decreases with increasing of purging time,but it increases with the scavenging rate increases until the CO removal rate reaches 92%.Based on the simulation results,the blowback system was experimentally debugged,the application effect on the flue gas blowback system was analyzed and the operating parameters were optimized.The debugged results show that the energy saving effect is remarkable,the CO concentration in the flue gas decreases by more than 90%,and the fuel consumption per ton of steel is reduced by about 5%.The application of flue gas blowback system provides a theoretical basis and reference for the gas emission problems in the regenerative furnace reversing process.Figure 38;Table 12;Reference 55...