Lundberg offers both air and molecular oxygen white liquor oxidation systems. Oxidized liquor becomes a caustic source for oxygen delignification of pulp in the bleach plant. The molecular oxidation system can be supplied as a pre-piped, skid mounted module including all instrumentation and valves ready to be mounted on the purchaser’s foundation and connected to the service piping.
Lundberg’s patented air oxidation system is usually a two-stage process within one tank, or if capacity is too large, in two tanks. The molecular oxygen oxidation process takes place under high pressure and temperature. Molecular oxygen is sparged into the feed white liquor. This mixture is passed through a series of serpentine pipes to induce mixing and give residence time for the reaction to occur.