CHEMREC Kraft Recovery Booster.

On the Recovery of Hemicellulose before Kraft Pulping

To assess the feasibility of implementing hemicellulose recovery stages in kraft mills, Eucalyptus globulus wood samples were subjected to aqueous treatments with hot, compressed water (autohydrolysis processing) to achieve partial dissolution of xylan. Autohydrolyzed solids were subjected to kraft pulping under selected conditions to yield a pulp of low kappa number, and to an optimized TCF bl...

Numerical Investigation of Kraft Recovery Furnace Wall Temperature

Deposits can affect the in-furnace wall surface temperature in a Kraft recovery furnace. In CFD (Computational Fluid Dynamics) models of the Kraft recovery furnace, the wall surface temperature is frequently used as the heat-transfer boundary condition. Therefore, the effect of deposits must be taken into account in CFD models. In this work, CFD simulations of a Kraft recovery furnace were perf...

Gas flow analysis in a Kraft recovery boiler

Recovery Boiler Capability to Accommodate Alternative Kraft Mill Processes

he Technical Association of the Pulp and Paper Industry (TAPPI) sponsored a Paper InT dustry Research Needs workshop at the State University of New York, College of Environmental Science and Forestry in Syracuse, New York, May 26-28,1992, The Pulping and Bleaching Processes Panel identified the major need in kraft black liquor recovery, namely, an affordable, incremental, chemical recovery capa...

Recovery of Acetic Acid from Prehydrolysis Liquor of Kraft Hardwood Dissolving Pulp using Ion-exchange Resin

The growing demand for rayon and cellulosic products has resulted in the conversion of a number of kraft pulp mills into dissolving pulp mills in recent years. In fact, kraft-based dissolving pulp production fits well into the concept of an integrated forest biorefinery, in particular, the utilization of dissolved organics in the pre-hydrolysis liquor (PHL) for bio-materials and bio-energy purp...