Global Patent Index - EP 1404919 B2

EP 1404919 B2 20101020 - METHOD AND APPARATUS FOR CONTROL OF DRYING PROCESS TAKING PLACE IN A PULP DRYER

Title (en)

METHOD AND APPARATUS FOR CONTROL OF DRYING PROCESS TAKING PLACE IN A PULP DRYER

Title (de)

VERFAHREN UND VORRICHTUNG ZUR KONTROLLE DER TROCKNUNG IM FASERSTOFFTROCKNER

Title (fr)

PROCEDE ET DISPOSITIF DE COMMANDE D'UN PROCESSUS DE SECHAGE DANS UN SECHOIR DE PULPE

Publication

EP 1404919 B2 20101020 (EN)

Application

EP 02745457 A 20020704

Priority

  • FI 0200612 W 20020704
  • FI 20011482 A 20010706

Abstract (en)

[origin: WO03004764A1] The invention concerns a method for control of the drying process taking place in a pulp dryer, which pulp dryer comprises several blowing fan levels, from which drying gas is blown on both sides of the web, and which method comprises measuring the web's moisture information (ho) on the web section entering the pulp dryer by a first moisture sensor (So) and measuring the web's moisture information (hN) on the emerging web section by a later moisture sensor (SN). In addition, the method comprises dividing the pulp dryer (10) into two or more drying sections (101,...lON) and controlling the moisture level of the pulp web (W) separately in each drying section (101,... ION). The invention also concerns an apparatus for control of the drying process taking place in a pulp dryer, in which apparatus the pulp dryer comprises several blowing fan levels, from which blowing of drying gas is arranged on both sides of the web and wherein a first moisture sensor (S1) is arranged for the web section entering the pulp dryer and a last moisture sensor (SN) is arranged for the web section emerging from the pulp dryer, and wherein the pulp web's moisture level existing in the pulp dryer is controlled by a steam valve/steam valves. In the apparatus according to the invention the pulp dryer (10) is divided into two or more drying sections (101,...ION) and a separate control of the moisture level of the pulp web (W) is arranged for each drying section (101,...ION).

IPC 8 full level

D21F 5/18 (2006.01)

CPC (source: EP)

D21F 5/18 (2013.01)

Citation (opposition)

Opponent :

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

DOCDB simple family (publication)

WO 03004764 A1 20030116; AT 338162 T 20060915; DE 60214380 D1 20061012; DE 60214380 T2 20070913; DE 60214380 T3 20110421; EP 1404919 A1 20040407; EP 1404919 B1 20060830; EP 1404919 B2 20101020; ES 2271288 T3 20070416; ES 2271288 T5 20110315; FI 20011482 A0 20010706

DOCDB simple family (application)

FI 0200612 W 20020704; AT 02745457 T 20020704; DE 60214380 T 20020704; EP 02745457 A 20020704; ES 02745457 T 20020704; FI 20011482 A 20010706