Modeling of the energy of a smelt-water explosion in the recovery boiler dissolving tank

摘要

The explosion energy generated as molten smelt droplets interact with water was evaluated as a function of smelt distribution,water temperature,and smelt temperature using a thermodynamic model.The results show that increasing smelt-to-water volume ratio and water temperature significantly increases the explosion energy,converting a larger proportion of the thermal energy of smelt into mechanical work.To reduce the chance of violent smelt-water explosions,it is important to: i)optimize the shatter jet design and operation to uniformly distribute the smelt over a large area in the dissolving tank;ii)avoid high green liquor temperature and ensure adequate liquor mixing;and iii)avoid upsets that may cause heavy smelt runoff or jellyroll smelt.