Utilization of excess heat in the pulp and paper industry––a case study of technical and economic opportunities

Bengtsson, Charlotte; Nordman, Roger; Berntsson, Thore

doi:10.1016/s1359-4311(02)00017-0

Cited by 37 publications

(23 citation statements)

References 6 publications

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“…Lutz [8]. Accordingly, several pinch-based studies have shown that significant energy savings are possible by employing thermal process integration in real mills, such as integrated kraft paper mills [9][10][11], market kraft pulp mills [8,12] and integrated board mills [13]. For overviews, Fouche and Banerjee [14] and Bruce [6] have reviewed energy-saving opportunities in different studies.…”

Section: Previous Workmentioning

confidence: 99%

Influence of seasonal variations on energy-saving opportunities in a pulp mill

Persson¹,

Berntsson²

2009

Energy

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Section: Previous Workmentioning

confidence: 99%

Influence of seasonal variations on energy-saving opportunities in a pulp mill

Persson¹,

Berntsson²

2009

Energy

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“…The existing process integration methods for retrofitting can be divided into methods based on pinch analysis [5][6][7][8][9][10][11][12], optimisation methods [13][14][15][16][17] and combinations of the two [18][19][20][21][22][23]. In connection with the use of pinch analysis, graphical methods have been developed based on exergy [24][25][26] and advanced composite curves [28][29][30].…”

Section: Earlier Workmentioning

confidence: 99%

Energy efficiency improvement of dryer section heat recovery systems in paper machines – A case study

Sivill

Ahtila

2009

Applied Thermal Engineering

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To cite this version:Leena Sivill, Pekka Ahtila. Energy efficiency improvement of dryer section heat recovery systems in paper machines -A case study. Applied Thermal Engineering, Elsevier, 2009, 29 (17-18) This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ACCEPTED MANUSCRIPTEnergy efficiency improvement of dryer section heat recovery systems in paper machines -A case study AbstractModern paper machines are equipped with heat recovery systems that transfer heat from the humid exhaust air of the paper machine's dryer section to different process streams. As a result of process changes, the heat recovery systems may operate in conditions far from the original design point, creating a significant potential for energy efficiency improvement. In this paper we demonstrate this potential with a case study of three operating paper machines. Both operational and structural improvement opportunities are examined. Since the existing retrofit methodologies for heat exchanger networks can not be applied to cases with condensing air, we use thermodynamic simulation models presented earlier to assess the effects of possible changes on the existing heat recovery systems. In order to reduce the required processing time of the simulation models, only a limited number of pre-screened retrofit designs are considered. The pre-screening is carried out on the basis of guidelines presented earlier.The analysis in the case mill revealed savings of 110 GWh/a in process heat with profitable investments. According to the follow-up study, the investments carried out have resulted in 12 % lower fuel use and 24 % lower CO 2 emissions. The results imply that all operating paper machines should be similarly examined.

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“…Process integration methods provide useful tools for evaluating possible process alternatives. Several studies of paper and pulp mills have been carried out by using pinch analysis [1][2][3][4][5][6][7] and mathematical programming [8][9][10][11][12][13]. However, the scope of modelling and simulation has not been as complete as it is in many other process industries.…”

Section: Introductionmentioning

confidence: 99%

Simulation and energy optimization of a pulp and paper mill – Evaporation plant and digester

Lundgren

Wang³

et al. 2012

Applied Energy

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A mathematical process integration model of a pulp and paper mill in the Northern Sweden has been developed. The main modelling focus has been put on the two main steam consumers (the evaporation plant and the digester), for which detailed material and energy balances have been established. Operational data have been used to validate the simulation results. By implementing these submodels into the complete plant model, the influence of different operation parameters on the overall plant performance has been investigated. Furthermore, introductory studies with the main objective to minimize the plant energy cost have been carried out. The correlation and differences between economic and energy have been discussed. KeywordsPulp and paper mill, evaporation plant, digester

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Utilization of excess heat in the pulp and paper industry––a case study of technical and economic opportunities

Cited by 37 publications

References 6 publications

Influence of seasonal variations on energy-saving opportunities in a pulp mill

Influence of seasonal variations on energy-saving opportunities in a pulp mill

Energy efficiency improvement of dryer section heat recovery systems in paper machines – A case study

Simulation and energy optimization of a pulp and paper mill – Evaporation plant and digester

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