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Journal articles
Magazine articles
Open Access
Addressing production bottlenecks and brownstock washer optimization via a membrane concentration system, TAPPI Journal July 2021

ABSTRACT: Advancements in membrane systems indicate that they will soon be robust enough to concentrate weak black liquor. To date, the economic impact of membrane systems on brownstock washing in kraft mills has not been studied and is necessary to understand the viability of these emerging systems and their best utilization.This study investigated the savings that a membrane system can generate related to brownstock washing. We found that evaporation costs are the primary barrier for mills seeking to increase wash water usage. Without these additional evaporation costs, we showed that our hypothetical 1000 tons/day bleached and brown pulp mills can achieve annual savings of over $1.0 MM when operating at higher dilution factors and fixed pulp production rate. We then investigated the impact of increasing pulp production on mills limited by their equipment. In washer-limited mill examples, we calculated that membrane systems can reduce the annual operating cost for a 7% production increase by 91%. Similarly, in evaporator-limited mill examples, membrane systems can reduce the annual operating cost for a 7% production increase by 86%. These results indicated that membrane systems make a production increase significantly more feasible for these equipment-limited mills.

Journal articles
Open Access
Behavior of steel core in the unwinding process, TAPPI JOURNAL, October 1992, Vol. 75(10)

Behavior of steel core in the unwinding process, TAPPI JOURNAL, October 1992, Vol. 75(10)

Journal articles
Open Access
Validity of physical flow modeling of kraft recovery boilers, TAPPI JOURNAL, September 1992, Vol. 75(9)

Validity of physical flow modeling of kraft recovery boilers, TAPPI JOURNAL, September 1992, Vol. 75(9)

Journal articles
Open Access
Valves: corrosion and maintenance, TAPPI JOURNAL, August 1993, Vol. 76(8)

Valves: corrosion and maintenance, TAPPI JOURNAL, August 1993, Vol. 76(8)

Journal articles
Open Access
Xylanase treatment for the bleaching of softwood kraft pulps: the effect of chlorine dioxide substitution, TAPPI JOURNAL, August 1993, Vol. 76(8)

Xylanase treatment for the bleaching of softwood kraft pulps: the effect of chlorine dioxide substitution, TAPPI JOURNAL, August 1993, Vol. 76(8)

Journal articles
Open Access
Polyelectrolyte interactions with papermaking fibers: the mechanism of surface-charge decay, TAPPI JOURNAL, December 1993, Vol. 76(12)

Polyelectrolyte interactions with papermaking fibers: the mechanism of surface-charge decay, TAPPI JOURNAL, December 1993, Vol. 76(12)

Journal articles
Open Access
Bleaching Mixed Office Waste to High Brightness, TAPPI JOURNAL, March 1994, Vol. 77(3)

Bleaching Mixed Office Waste to High Brightness, TAPPI JOURNAL, March 1994, Vol. 77(3)

Journal articles
Open Access
Initial validation of a mathematical model of cold flow in a recovery boiler, TAPPI JOURNAL, May 1994, Vol. 77(5)

Initial validation of a mathematical model of cold flow in a recovery boiler, TAPPI JOURNAL, May 1994, Vol. 77(5)

Journal articles
Open Access
Bleach plant closeup and conversion to tcf: a case study using mill data and computer simulation, TAPPI JOURNAL, November 1994, Vol. 77(11)

Bleach plant closeup and conversion to tcf: a case study using mill data and computer simulation, TAPPI JOURNAL, November 1994, Vol. 77(11)

Journal articles
Open Access
Pilot-plant experience with ozone in tcf bleaching of eucalypt pulp, TAPPI JOURNAL, November 1994, Vol. 77(11)

Pilot-plant experience with ozone in tcf bleaching of eucalypt pulp, TAPPI JOURNAL, November 1994, Vol. 77(11)

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