METHOD FOR COMPLETE COMBUSTION OF BLEACH PLANT WASTE LIQUORS

摘要

Method for complete combustion of aqueous cellulose bleach plant waste liquors, particularly waste liquors from bleaching processes comprising chlorine dioxide bleaching steps, wherein said cellulose bleach plant waste liquor is concentrated to a solids content of about 35 % to about 70 % by weight; the solids have a net dry substance calorific value of 3.0 - 9.0 GJ/metric ton. The concentrated aqueous solution and an oxygen containing gas sufficient for complete combustion are fed to a burner connected to a reactor to be incinerated under formation of inorganic products suitable for discharge into the environment after full or partial neutralization, particularly in form of their neutralized or partially neutralized aqueous solutions, and/or fit for reuse, particularly in the mill.