Chemical Handling
White Liquor Oxidation
A.H. Lundberg Systems supplies two types of white liquor oxidation systems to generate a caustic substitute. Our patented air oxidation system drives residual sulphide content to virtually nil while the oxygen system is supplied as a module complete with all piping and instrumentation ready for connection to the mill's piping.
Sulphur Burners
The generation of sulphur dioxide from burning elemental sulphur has a wide range of applications not only in the pulping industry but also in such diversified industries as wet corn milling, sugar refining, and soap manufacturing. The A.H. Lundberg Systems design is suitable for all of these applications. The size of the system is suited to the mill application, and the range of sizes offered is from 1 ton per day sulphur dioxide to above 60 tons per day.
The Lundberg Systems’ design can include infrastructure to melt solid sulphur or utilize molten sulphur.
The molten sulphur is combusted in a pressurized chamber using atomizing air. This results in a high combustion temperature as well as a high sulphur dioxide concentration, thus minimizing sulphur trioxide generation. The combustion products may be cooled for absorption into water or a caustic solution. Furthermore the hot sulphur dioxide gas may be air quenched and sent to a sulphuric acid plant.
Recent Lundberg Systems advances in the design of sulphur burner systems provide plants that are fully automated and provide a high sulphur dioxide content while minimizing sulphur trioxide generation.
Chlorine Dioxide Generation
A.H. Lundberg Systems currently supplies systems using the Mathieson, Solvay, and R2 processes. The Mathieson process uses sulphur dioxide as the reducing agent, the Solvay process uses methanol, and the R2 process uses sodium chloride.
In addition to new systems, Lundberg Systems specializes in upgrades to existing systems. Upgrades are usually undertaken to increase capacity, solution strength, safety, and ease of operation. Often this entails modification to or replacement of the chlorine dioxide generators, absorption tower, or feed systems for the various chemicals. When the generators are modified or replaced, titanium construction is utilized which has the added benefit of reducing maintenance costs compared to lead lined units.