Boiler Retrofit Improves Efficiency and Increases Biomass Firing Rates, 20PEERS Conference

The Domtar Paper Company LLC’s (DOMTAR’s), mill in Plymouth, North Carolina, has relied on two biomass/hog fuel fired boilers (HFBs) to meet the mill steam demand requirements. As part of a mill energy consolidation and reliability improvement effort, the mill wished to decommission the No. 1 HFB and refurbish/retrofit the No. 2 HFB.

The No. 2 HFB was originally designed to burn pulverized coal and/or biomass on a traveling grate. The maximum steaming capacity was 500,000 lb/hr from firing coal and 400,000 lb/hr from biomass. However, the boiler was never able to sustain this design specified biomass steaming rate.  

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