China Nonferrous Metallurgy

The mixing and mass transfer performance of the multiphase system directly affects the multiphase reaction process. The team developed a new type of tubular stirred reactor that discharges gas from the impeller end. The steady-state sulfite method (FSM) was used to study the gas-liquid mass transfer performance of the reactor. The effects of ventilation flow rate Q, stirring Froude number Fr and liquid content on the volumetric mass transfer coefficient kLa were investigated. The results show that increasing Q and Fr can effectively improve k_La. The new inlet mode can enhance k_La, which is about 2 times higher than that of the traditional reactor. The gas-liquid mass transfer performance of the reactor is highest at ε=0.5, Fr=0.054, Q=1.6m³·h^-1, with k_La=0.0324s^-1. Based on the experimental data, a dimensionless correlation for k_La was established, and the error was basically within 25%, which has reference significance for improvement and application of the subsequent reactor.