Lundberg, LLC products

Lundberg pioneered the art of black liquor oxidation. Many Kraft recovery boilers still utilize direct-contact evaporation to increase boiler firing solids.

Lundberg is the leader in the technology for steam stripping foul process condensates that result from the pulping process. Our systems are installed in pulp mills all over the world.

Lundberg offers full sets of evaporators including integrated concentrator and condensate stripping systems as appropriate. The systems that we offer are designed to handle the particular nature of the liquor involved, from the easiest softwood liquor to the most difficult of liquors including bagasse and wheat straw. We provide systems for all types of cooking processes including kraft, sulfite and soda based systems. All of Lundberg’s evaporator systems are of tubular design. We consider a number of factors in the design of an evaporator system to provide the best solution for the liquor involved, including economy, scaling tendencies and desired product solids.

Lundberg provides black liquor concentrator systems to solids in excess of 80%. These systems may be stand-alone, integrated with a multiple effect evaporator system or integrated with a pre-evaporation system.

Pre-evaporation systems utilize low-level waste heat to evaporate weak liquor prior to the main evaporator train. Three heat sources are most often utilized in a pre-evaporator system: heat from a blow heat system, heat from a stand-alone concentrator, or heat from a continuous digester extraction liquor flash tank. The amount of evaporation achievable is dependent upon both the quantity of heat available and the number of effects in the system. Whenever a pre-evaporator is installed, its impact on the existing multiple effect evaporator system must be considered, in particular the effect of the higher feed solids.

Lundberg provides surface condenser systems as part of the overall Evaporator product group.

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.

In pine Kraft softwood mills tall oil soap is a valuable by-product as well as a toxin in the wastewater treatment system. Thus it is necessary to properly manage foam and soap within the mill. Managing this issue requires a number of steps including the handling and deaeration of foam, separation of soap from liquor, and the separation of liquor from soap. Lundberg can provide a complete system to manage and collect soap within your black liquor system. Our systems include Skumslakers to break the foam, concentrators to further deaerate the soap, floating soap skimmers to collect the soap and soap separators to remove black liquor from the collected soap.

Lundberg is the leader in the design and installation of turpentine recovery systems. We have over 100 projects completed from installation of full systems to upgrading existing turpentine collection systems.

Lundberg’s Ash Treatment System (ATS) processes the sulfated ash from the chemical recovery boiler precipitator to remove potassium and chlorides and allows for the recovery of sodium sulfate crystals.