Effect of flange design on the performance of a blast furnace air tuyere with heat-insulating insert
摘要
The distribution of natural gas into the blast channel of a blast-furnace air tuyere with a heat-insulating insert enhances the mixing of gas with the blast air and improves combustion efficiency. Numerical simulations were conducted using Ansys to analyze gas dynamics, heat transfer, and natural gas combustion during injection through a collector cavity and a set of holes in the tuyere flange. The effects of the diameter and number of flange holes on tuyere performance were investigated. The thermal and gas-dynamic performance of the tuyere and the thermal stresses in the insert were found to depend on the ratio of cross-sectional areas at the inlet and outlet of the collector.