Foul condensates from the cooking plant and evaporation plant in a kraft mill contain sulfur gas and organic compounds such as methanol, which contribute to a mill’s odorous emissions as well as an increased demand on the effluent treatment systems. ANDRITZ technology converts the off-gases from these condensates into liquid fuels that can be stored safely and utilized as fuel.
MeOH plant 3d image
Untreated foul condensates cannot be reused in a mill and put a high load of biochemical oxygen demand (BOD) and toxicity into the mill’s effluent treatment systems. By collecting these condensates and stripping them of their methanol content, most of the potential pollutants can be removed and the stripped condensates can be reused for pulp washing or the recausticizing plant.
Since the condensate treatment process in the evaporation plant produces off-gases (SOG) that have high heating value, these gases cannot be safely stored, making treatment options more difficult.
ANDRITZ liquid methanol plants convert SOG into a liquid fuel that has less than 20% water content. This form of liquid methanol (MeOH) is an excellent fuel for lime kilns, boilers, and incinerators that can be stored and transported safely.
