Home Sciences & Innovations Sciences Thermal Energy Efficiency Analysis and Enhancement of Three Canadian Kraft Mills

Thermal Energy Efficiency Analysis and Enhancement of Three Canadian Kraft Mills

Technical Paper published in J-FOR+* Vol.5, No1

ABSTRACT

Implementing the integrated forest biorefinery is a potentially effective way to diversify the product portfolio of the Canadian pulp and paper (P&P) industry and generate new revenues. However, it is subject to constraints and limitations. One constraint is high energy efficiency to ensure independence from fossil fuels. To achieve this goal, a new innovative methodology for analyzing the energy efficiency of waterbased P&P processes has been developed and validated. Specific features of this methodology include combined steam and water systems analysis, a project-oriented approach, and use of heuristic rules.

This report presents the results of applying this original methodology to the energy efficiency of three operating Canadian Kraft pulp mills with different configurations: a dissolving pulp mill, a standard Kraft mill combined with a mechanical pulping line, and a twin-line standard Kraft mill. The energy efficiency enhancement programs developed using this methodology could, if implemented, produce steam and water use reductions far superior to those obtained by current engineering practice: 30% to 40% for steam and 25% to 50% for water.

The method has revealed large differences between the three mills in steam and water use. The proposed energy enhancement program would enable the mills to shut down permanently their current natural gas-fired power boilers, to support integrated biorefineries producing biofuels or other bioproducts, and to increase their electricity production. Implementing efficiency-enhancement programs in stand-alone Kraft mills (i.e., without biorefineries) would have an attractive cost recovery period, varying from less than one year to about three years.

Click to access the complete article in a pdf format

 

AUTHORS:

MOHAMMAD KESHTKAR
Dept of Chemical Engineering,
Research Unit on Energy Efficiency and Sustainable Implementation of the Forest Biorefinery (E2D2BF),
 École Polytechnique, Montreal
Canada
RADIA AMMARA
Dept of Chemical Engineering,
Research Unit on Energy Efficiency and Sustainable Implementation of the Forest Biorefinery (E2D2BF),
 École Polytechnique, Montreal
Canada
MICHEL PERRIER
Dept of Chemical Engineering,
Research Unit on Energy Efficiency and Sustainable Implementation of the Forest Biorefinery (E2D2BF),
 École Polytechnique, Montreal
Canada
JEAN PARIS
Dept of Chemical Engineering,
Research Unit on Energy Efficiency and Sustainable Implementation of the Forest Biorefinery (E2D2BF),
 École Polytechnique, Montreal
Canada

* J-FOR - The Journal of Science & Technology for Forest Products and Processes, is a PAPTAC's flagship publication, incorporating high-quality peer-reviewed papers dealing with the technology and science of traditional and emerging areas that are pertinent to the forest industry.

 

 
paptac-portal
subscription-enewsletter
access-enewsletters
nalco banner
kadant banner
fpinnovations banner
Cristini Banner

Precision Roll Grinders

PaperWeek Banner
fpinnovations banner
buckman banner
New Job Postings
New Job Postings
New Job Postings
Paper Advance Banner