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A multistage pH-control strategy in printing paper production; Monivaiheinen Ph:n saeaetoestrategia painopaperin valmistuksessa - MPKT 08

Abstract

The UPM-Kymmene paper mill in Kaipola (Finland) uses recycled paper material, deinked pulp and thermomechanical pulp in the production of different paper grades. The quality changes in the recycled pulp, and especially the varying calcium content, cause problems for those paper machines, which use a mixture of different pulps as raw material. The calcium content and the prevailing pH-value have great influence on the stability of e.g. the resin colloid material of the pulp, and that is why they are important factors in the smooth operation of the machine. The first task in this study was the construction of a reliable method for the pH-measurement of the thick deinked pulp and the development of a satisfactory control based on this measurement. This task was realised using a specific measuring line for the pH-measurement and a linear feedforward-feedback control algorithm. The second task was to create a static three phase pH-simulator, that was verified using real pulps and distribution analysis. Unit operation dynamic flow models were also developed and this part of the study is going on presently. (orig.)
Authors:
Ylen, J P; Jutila, P [1] 
  1. Helsinki Univ. of Technology, Otaniemi (Finland)
Publication Date:
Dec 31, 1998
Product Type:
Technical Report
Report Number:
NEI-FI-362
Reference Number:
SCA: 320305; PA: FI-99:003391; SN: 99002156302
Resource Relation:
Other Information: PBD: 1998; Related Information: Is Part Of CACTUS technology programme. Yearbook 1998; Alakangas, E. [ed.]; PB: 300 p.
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PAPER INDUSTRY; PAPER; PRODUCTION; PH VALUE; MEASURING METHODS; COMPUTERIZED CONTROL SYSTEMS; FINLAND; SLURRIES; RECYCLING; CALCIUM; CHEMICAL ANALYSIS; COMPUTERIZED SIMULATION
OSTI ID:
703393
Research Organizations:
VTT Energy, Jyvaeskylae (Finland)
Country of Origin:
Finland
Language:
Finnish
Other Identifying Numbers:
Other: ON: DE99771568; TRN: FI9903391
Availability:
OSTI as DE99771568
Submitting Site:
FI
Size:
pp. 161-169
Announcement Date:
Jan 25, 2004

Citation Formats

Ylen, J P, and Jutila, P. A multistage pH-control strategy in printing paper production; Monivaiheinen Ph:n saeaetoestrategia painopaperin valmistuksessa - MPKT 08. Finland: N. p., 1998. Web.
Ylen, J P, & Jutila, P. A multistage pH-control strategy in printing paper production; Monivaiheinen Ph:n saeaetoestrategia painopaperin valmistuksessa - MPKT 08. Finland.
Ylen, J P, and Jutila, P. 1998. "A multistage pH-control strategy in printing paper production; Monivaiheinen Ph:n saeaetoestrategia painopaperin valmistuksessa - MPKT 08." Finland.
@misc{etde_703393,
title = {A multistage pH-control strategy in printing paper production; Monivaiheinen Ph:n saeaetoestrategia painopaperin valmistuksessa - MPKT 08}
author = {Ylen, J P, and Jutila, P}
abstractNote = {The UPM-Kymmene paper mill in Kaipola (Finland) uses recycled paper material, deinked pulp and thermomechanical pulp in the production of different paper grades. The quality changes in the recycled pulp, and especially the varying calcium content, cause problems for those paper machines, which use a mixture of different pulps as raw material. The calcium content and the prevailing pH-value have great influence on the stability of e.g. the resin colloid material of the pulp, and that is why they are important factors in the smooth operation of the machine. The first task in this study was the construction of a reliable method for the pH-measurement of the thick deinked pulp and the development of a satisfactory control based on this measurement. This task was realised using a specific measuring line for the pH-measurement and a linear feedforward-feedback control algorithm. The second task was to create a static three phase pH-simulator, that was verified using real pulps and distribution analysis. Unit operation dynamic flow models were also developed and this part of the study is going on presently. (orig.)}
place = {Finland}
year = {1998}
month = {Dec}
}