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Using bleaching stage models for benchmarking hardwood ECF bleach plants, TAPPI Journal October 2023
ABSTRACT: Steady-state models estimated the performance of the D0(EOP)D1 bleach sequence at two mixed hardwood bleach plants in the southern United States. At Mill 1, the full sequence’s chlorine dioxide charge that brightens the pulp to ~84% ISO was monitored for two weeks. Mill 2 considered the partial sequence that brightens the pulp to ~86% ISO for nearly four weeks. Elevated levels of chlorine dioxide were linked to increased washer carryover in brownstock and extraction areas. For Mills 1 and 2, an extra 0.24% and 0.33% chlorine dioxide was consumed in the D0 stage. This extra bleach demand was equivalent to an additional 4.8 and 5.5 kappa load to the brownstock, respectively. Some differences were observed for the D1 stage. Mill 1 had extraction carryover that averaged 1.1 units higher than was measured, contributing to use of an extra 0.22% of chlorine dioxide. Mill 2 had extraction carryover that averaged between 0 and 0.7 kappa units and consumed up to 0.13% more chlorine dioxide. Another data set from Mill 2 showed high brownstock and extraction carryover, leading to ~0.90% more total chlorine dioxide usage to brighten to 84% ISO. Overall, this investigation illustrated that the models could be employed as benchmarks.
Journal articles
Magazine articles
The influence of strain rate and pulp properties on the stre
The influence of strain rate and pulp properties on the stress-strain curve and relaxation rate of wet paper, TAPPI JOURNAL August 2015
Journal articles
Magazine articles
Editorial: Art Ragauskas: Eyes on the future, TAPPI JOURNAL
Editorial: Art Ragauskas: Eyes on the future, TAPPI JOURNAL October 2012
Magazine articles
China paper technical program and exhibit came of age in 1995, TAPPI JOURNAL, March 1996, Vol. 79(3)
China paper technical program and exhibit came of age in 1995, TAPPI JOURNAL, March 1996, Vol. 79(3)
Magazine articles
1995 Finishing and Converting Conference: Taking advantage of changing trends, TAPPI JOURNAL, March 1996, Vol. 79(3)
1995 Finishing and Converting Conference: Taking advantage of changing trends, TAPPI JOURNAL, March 1996, Vol. 79(3)
Magazine articles
Nonwood fibers mark the road to gold for jow atchison, TAPPI JOURNAL, March 1996, Vol. 79(3)
Nonwood fibers mark the road to gold for jow atchison, TAPPI JOURNAL, March 1996, Vol. 79(3)
Magazine articles
Inside ctapi, TAPPI JOURNAL, May 1996, Vol. 79(5)
Inside ctapi, TAPPI JOURNAL, May 1996, Vol. 79(5)
Magazine articles
Suzhou papyrus paper readies 100,000 ton coated fine paper mill, TAPPI JOURNAL, May 1996, Vol. 79(5)
Suzhou papyrus paper readies 100,000 ton coated fine paper mill, TAPPI JOURNAL, May 1996, Vol. 79(5)
Magazine articles
Cedar river's linerboard machine inaugurated, TAPPI JOURNAL, November 1996, Vol. 79(11)
Cedar river's linerboard machine inaugurated, TAPPI JOURNAL, November 1996, Vol. 79(11)
Magazine articles
Building a team: the cedar river project, TAPPI JOURNAL, November 1996, Vol. 79(11)
Building a team: the cedar river project, TAPPI JOURNAL, November 1996, Vol. 79(11)