Falling Film Evaporators
Kadant evaporators are perfectly suited for liquor concentrations below first critical solids (between 45-55%TS) and are specifically designed to reduce foaming. They offer high turndown capabilities which provide operating flexibility and feature efficient condensate segregation through special baffling and our unique cross-flow, shell-side design.
Falling Film Crystallizers
For potentially heavy scaling applications above critical solids, Kadant falling film crystallizers use high recirculation rates (for low supersaturation) and large liquor volumes (for residence time and crystal growth). This promotes the precipitation of sodium salts as crystals within the liquor, not as scale on the heat transfer surfaces. Online washing capabilities eliminate the need for concentrator boil-outs altogether.
Enhanced, Forced-Circulation Crystallizers
Another option for the processing of high solids black liquor is our enhanced, forced-circulation crystallizers which rely on increased turbulence to achieve higher heat transfer performance at reduced recirculation rates. This technology is specifically invaluable when processing liquors of an excessively high viscosity or exhibiting unusual fouling and scaling tendencies. The enhancer technology can easily retrofit onto older traditional non-enhanced crystallizers to reduce power consumption, raise the liquor dry solids content and increase time between boil-outs.
Cross-Flow™ Condensers
Kadant’s Cross-Flow condenser design provides a unique vapor flow pattern across the tube bundle to minimize overall pressure drop – much lower than in conventional serpentine designs – while allowing optimum NCG removal at reduced vapor losses. In addition, the Cross-Flow design provides for optimum methanol and foul condensate collection and the opportunity for increased collection flexibility during under-loaded conditions.
