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Magazine articles
Boiler retrofit improves efficiency and increases biomass firing rates, TAPPI Journal March 2021
ABSTRACT: Domtar’s fluff pulp mill in Plymouth, NC, USA, operates two biomass/hog fuel fired boilers (HFBs). For energy consolidation and reliability improvement, Domtar wanted to decommission the No. 1 HFB and refurbish/retrofit the No. 2 HFB. The No. 2 HFB was designed to burn pulverized coal and/or biomass on a traveling grate. The steaming capacity was 500,000 lb/h from coal and 400,000 lb/h from biomass. However, it had never sustained this design biomass steaming rate. As the sole power boiler, the No. 2 HFB would need to sustain 400,000 lb/h of biomass steam during peak loads. An extensive evaluation by a combustion and boiler technologies supplier was undertaken. The evaluation involved field testing, analysis, and computational fluid dynamics (CFD) modeling, and it identified several bottle-necks and deficiencies to achieving the No. 2 HFB’s biomass steam goal. These bottlenecks included an inadequate combustion system; insufficient heat capture; excessive combustion air temperature; inadequate sweetwater con-denser (SWC) capacity; and limited induced draft fan capacity.To address the identified deficiencies, various upgrades were engineered and implemented. These upgrades included modern pneumatic fuel distributors; a modern sidewall, interlaced overfire air (OFA) system; a new, larger economizer; modified feedwater piping to increase SWC capacity; replacement of the scrubber with a dry electrostatic precipitator; and upgraded boiler controls.With the deployment of these upgrades, the No. 2 HFB achieved the targeted biomass steaming rate of 400,000 lb/h, along with lowered stack gas and combustion air temperatures. All mandated emissions limit tests at 500,000 lb/h of steam with 400,000 lb/h of biomass steam were passed, and Domtar reports a 10% reduction in fuel firing rates, which represents significant fuel savings. In addition, the mill was able to decommission the No. 1 HFB, which has substantially lowered operating and maintenance costs.
Magazine articles
Promoting safety in the workplace, TAPPI JOURNAL, November 1995, Vol. 78(11)
Promoting safety in the workplace, TAPPI JOURNAL, November 1995, Vol. 78(11)
Magazine articles
1990 Papermakers conference draws 1040 registrants to hear presentations about all aspects of papermaking, TAPPI JOURNAL, July 1990, Vol. 73(7)
1990 Papermakers conference draws 1040 registrants to hear presentations about all aspects of papermaking, TAPPI JOURNAL, July 1990, Vol. 73(7)
Magazine articles
The identification of critical behaviors: the first step in a behavior-based safety process, TAPPI JOURNAL, October 1991, Vol. 74(10)
The identification of critical behaviors: the first step in a behavior-based safety process, TAPPI JOURNAL, October 1991, Vol. 74(10)
Magazine articles
'Advancing through cooperation' in printing and graphic arts, TAPPI JOURNAL, May 1995, Vol. 78(5)
'Advancing through cooperation' in printing and graphic arts, TAPPI JOURNAL, May 1995, Vol. 78(5)
Magazine articles
Moulin vieux maintains heritage of france's grenoble-Isere papermaking region, TAPPI JOURNAL, June 1997, Vol. 80(6)
Moulin vieux maintains heritage of france's grenoble-Isere papermaking region, TAPPI JOURNAL, June 1997, Vol. 80(6)
Magazine articles
On management: effective scheduling: a key management tool, TAPPI JOURNAL, April 1998, Vol. 81(4)
On management: effective scheduling: a key management tool, TAPPI JOURNAL, April 1998, Vol. 81(4)
Magazine articles
Technology affecting the bottom line was the focus for the tappi/isa-pupid pcE&i conference, TAPPI JOURNAL, August 1997, Vol. 80(8)
Technology affecting the bottom line was the focus for the tappi/isa-pupid pcE&i conference, TAPPI JOURNAL, August 1997, Vol. 80(8)
Magazine articles
Photographic life-prediction matrix for forming fabrics, TAPPI JOURNAL, November 1997, Vol. 80(11)
Photographic life-prediction matrix for forming fabrics, TAPPI JOURNAL, November 1997, Vol. 80(11)
Magazine articles
Leading the giant: an interview with john t. dillon, ceo and president, international paper, TAPPI JOURNAL, June 1998, Vol. 81(6)
Leading the giant: an interview with john t. dillon, ceo and president, international paper, TAPPI JOURNAL, June 1998, Vol. 81(6)
