On-line simulation of continuous pulp digester

Jansson, JohanMälardalens högskola,Akademin för hållbar samhälls- och teknikutveckling,PRO (author)

Continuous cooking is the dominant process in the kraft pulping industry. Our general knowledge and understanding of process conditions inside the digester is limited. Process control systems comprise of groups of measurements, which give information about conditions at the outer shell of the digester. These measurements mostly tell about cooking liquor inflows and outflows, temperature and it is also possible to measure pressure or pressure difference at the screen section of the digester shell. But ultimately process conditions inside the digester are based on measurements at the shell and intelligent approximations. The aim of this paper is to describe more accurately the cooking conditions and phenomena inside the digester. A model of a continuous digester was developed as an extension of the well known Purdue model [Bhartiya, 2003]. The model was adapted to simulate an industrial Lo-Solids pulp digester as well as an ITC digester. The models were then used to do online predictions and these predictions were compared with the actual plant performance.

TEKNIK OCH TEKNOLOGIER Materialteknik Pappers-, massa- och fiberteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Paper, Pulp and Fiber Technology hsv//eng
modelling
simulation
on-line
pulp digester
Cellulose and paper engineering
Cellulosa- och pappersteknik
Energy- and Environmental Engineering
energi- och miljöteknik

Groble, Fran (author)
Dahlquist, Erik,1951-Mälardalens högskola,Akademin för hållbar samhälls- och teknikutveckling,PRO(Swepub:mdh)edt01 (author)
Avelin, AndersMälardalens högskola,Akademin för ekonomi, samhälle och teknik,MERO(Swepub:mdh)aan10 (author)
Mälardalens högskolaAkademin för hållbar samhälls- och teknikutveckling (creator_code:org_t)

By the author/editor: Jansson, Johan; Groble, Fran; Dahlquist, Erik, ...; Avelin, Anders

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Paper Pulp and F ...

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