Valmet has focused on washing and dewatering for more than 50 years and is today a leading supplier of advanced wash press technology.
The scope of our washing technology encompasses Screw presses, TwinRoll presses and TwinWire presses. Each of them designed to offer optimum capability for efficient, environmentally friendly, high-quality washing.
In mechanical pulping systems, washing plays an essential role for the peroxide bleaching process when targeting high-quality products at low operating cost. Our extensive experience and unique solutions of the peroxide bleaching process covers all types of mechanical pulps – TMP, CTMP and PGW – and represents an investment in proven process know-how and long-term support.
Valmet's TwinRoll presses are characterized by excellent washing efficiency, high availability and high output consistency. They also have very high specific capacity resulting in extremely compact installations, which make the TwinRoll presses especially suitable for upgrades.
The Screw Press is built for dewatering of pulp suspensions from inlet consistencies of 3-12% to outlet consistencies up to 30% and even higher. Excellent washing efficiencies in the sense of removing COD and ionic trash can be achieved, thus the machine is found in pulp and recycled fiber applications.