Effect of burner angle deviation on entrained-flow fine slag gasification: An experimental and simulation study

The co-biased burner arrangement has the advantages of generating swirling flow and enhancing gas-solid mixing. The deviation of the burner deflection angle from the design value is a common occurrence, yet relevant research on it is uncommon. This study investigates the changes in gas-solid two-phase flow and flame deflection in the gasifier when the burner deflection angle deviates from the design value, using Particle Dynamic Analyzer (PDA) experiments and numerical simulation. When the burner deflection angle is smaller than the design value, the swirling flow in the gasifier tilts. When the deflection angles of A₁ and A₂ are 0°, 4°, the temperature at the furnace top reaches above 1900 °C. When the burner deflection angle is larger than the design value, the carbon conversion rate reaches the highest at 85%, but the swirling flow expands, and the high-temperature zone is close to the wall. The results explore the typical characteristics and potential hazards of burner flame deviation, providing a reference for the optimal operation of entrained-flow gasifiers.