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

Abstract

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

A multi-period mathematical model for simultaneous optimization of materials and energy on the refining site scale

“…The transshipment model was extended in some works to allow direct hot discharges/feeds between units for heat integration between process units and steam streams [33,34]. Heat integration between processes and utility systems were also investigated for some process industries, such as pulp and paper mill evaporation plants [35,36], juice processing plants [37], and industrial sawmill sites [38]. These works were mainly focused on heat integration, in which process throughput, flow sheets, and parameters are determined a priori.…”

Cost‐Saving Opportunities in the Energy Management of Papermaking Processes

“…Constant improvement of energy efficiency in the pulping and papermaking processes was, indeed, a frequent subject of academic research with industrial applications [13][14][15][16][17][18][19][20][21][22]. Fleiter et al [13] provided a comprehensive overview of the options to improve energy efficiency in the German pulp and paper industry with the emphasis on possible future trends.…”

How energy price changes can affect production- and supply chain planning – A case study at a pulp company

“…Other optimization approaches can also be found in the literature where, for instance, energy issues in the pulp and paper industry have been studied (e.g. Marshman et al, 2010;Xiaoyan et al, 2012), or where by-products in the steel industry have been in focus (e.g. Zhao et al, 2015).…”