MODELING OF THE ENERGY OF A SMELT-WATER EXPLOSION IN THE RECOVERY BOILER DISSOLVING TANK, 19PEERS

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. 

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