In pulp mill spent liquor produced during washing is highly toxic and requires treatment. In SSP's treatment technology valuable inorganic chemicals recovery is also done to keep pulping cost under control. Recovering inorganic chemicals is possible only by incineration of black liquor but since the liquor is in very dilute form containing as low as 8 to 10% solids, it is not economical to incinerate directly. For burning this liquor, it is concentrated in a Multiple Effect Evaporator to the desired concentration i.e. 65-70% in case of conventional recovery or 50% in case of non-conventional systems and then subsequently incinerated.

SSP supplies energy efficient evaporators to meet the requirement of concentration up to 50% or 65-70%. SSP has already supplied evaporators to a few companies where the evaporators are performing not only with better steam economy but also with reduced time for cleaning.

SSP evaporators are highly energy efficient and evaporate 7kg of water per kg of steam for concentration up to 50% in a seven effect plant. Also, the plant can be cleaned once in 25-30 days.