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Case Study: Heat recovery system provides Canadian pulp mill 50 MMBtu of energy per hour

2/5/2018

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Picture
Thermal Energy International implemented a FLU-ACE® Condensing Heat Recovery System on the pulp machine exhaust at a pulp mill in Canada. Heat sources considered for the application included boiler plant flue gas, lime kiln scrubber exhaust, smelt dissolving tank scrubber exhaust, pulp dryer exhaust, and recovery boiler exhaust. Ultimately the pulp dryer exhaust was selected due to its proximity to users, high temperature and humidity, steady flow, and low fouling potential.

The FLU-ACE system was designed to deliver some 50 MMBtu/hr of energy to plant systems (peak winter performance), saving 50,000 pounds and hour of steam to be fed back into existing steam turbines to generate more electricity. This energy was previously discharged and lost to the atmosphere in the form of hot air and water vapor in the pulp dryer exhausts.
​
Benefits: 
  • 50 MMBtu/hr heat recovery rate
  • 50,000 lb/hr steam made available for power production
  • Produces roughly 2000 USgpm of water at 60°C (140°F)
  • Half the price of gaining the same benefit through drying bark 
  • Turn-key system delivery
Picture
A cut-away of a direct-contact condensing heat recovery unit

The “free energy” from the exhaust was used to heat and preheat:
  • 470,000 cfm of outside air in 9 air heating units
  • Process water (boiler and bleach plant make up)

The system was implemented on a turn-key basis and was completed on budget and schedule. ​

Learn more about FLU-ACE
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  • About
    • Overview
    • Our impact to date
    • Vision and mission
    • Board of directors
    • Senior management
    • Careers
    • Contact us
  • Products
    • Our products
    • GEM steam traps >
      • GEM overview
      • GEM case studies
      • GEM brochures
      • GEM FAQ
      • GEM steam trap survey
      • Technical data
      • Petrochem Guide
    • FLU-ACE heat recovery >
      • Heat recovery overview
      • Heat recovery case studies
      • Heat recovery white papers
      • Heat recovery brochures
      • Heat recovery FAQ
    • BEI heat recovery >
      • BEI Overview
      • BEI Case Studies
      • Contact BEI
    • CoGeneration >
      • CoGeneration overview
      • CoGeneration case studies
    • DRY-REX biomass dryer
    • Turn-key solutions
  • Sectors
    • Sector applications
    • Food and beverage
    • Pulp and paper
    • Hospitals
    • Pharmaceuticals
    • Chemicals and petrochemicals
    • Other industry sectors
  • Media
    • Videos >
      • CEO Introductory Video
    • Blog
    • Events
    • News releases
    • Awards
    • Subscribe to our news
    • Media centre
  • Investors
    • Investor overview
    • Presentations
    • News releases
    • Financial reports
    • Shareholder information
    • 2020 Annual Meeting Materials
    • 2019 Annual Meeting Materials
    • 2018 Annual Meeting Materials
    • 2017 Annual Meeting Materials
    • 2016 Annual Meeting Materials
    • 2015 Annual Meeting Materials
  • Language
    • English
    • Deutsch