Method of determining the moisture content of a web of cellulose pulp

摘要

The present invention relates to a method of determining the moisture content of a web (3) of cellulose pulp arriving at a pulp dryer (1).The method comprises measuring, at several instants during a predetermined time interval, the moisture content of said web (3) using a moisture sensor (19) arranged upstream of the pulp dryer (1); measuring state variables of drying medium of said pulp dryer (1); calculating, based on said moisture sensor measurements, a total value of moisture introduced into the pulp dryer (1) by a portion of said web (3) during said predetermined time interval; determining, based on said measured state variables, a predicted total value of moisture present inside the pulp dryer (1); comparing said calculated total value with said predicted total value to obtain a deviation therebetween; calibrating said moisture sensor (19) using said deviation; and measuring the moisture content of a web (3) of cellulose pulp using said calibrated moisture sensor (19).