DRYING CHAMBER CONTAINING AT LEAST TWO ZONES OF DRYING BELT OF CELLULOSE MASS

摘要

1. Device for drying the web (18) of pulp in a drying chamber (1), which includes injection boxes (26, 32) that perform the function of blowing air to the web (18) of the pulp for drying the pulp according to the principle of the web being in the air characterized in that the drying chamber (1) includes a first drying zone (4), which contains the first lower pressure boxes (26) arranged so as to hold the web (18), and a second drying zone (6), which contains the second lower pressure boxes (32), arranged so as to hold the web (18), while the first lower pressure boxes (26) have a design different from the design of the second lower pressure boxes (32), so that the drying of the canvas ( 18) the pulp in the corresponding drying zone (4, 6) is suitable for the conditions prevailing in this particular zone. 2. The device according to claim 1, characterized in that the first drying zone (4) is located upstream from the second drying zone (6), when viewed in the direction of feed of the pulp web (18). 3. The device according to claim 1 or 2, characterized in that the relative lifting force of the second lower pressure boxes (32) is higher than the relative lifting force of the first lower pressure boxes (26) at least at a distance (H3, H1) between the corresponding lower pressure box and cloth (18) pulp. 4. The device according to claim 3, characterized in that the relative lifting force of the second lower discharge boxes (32) is higher than the relative lifting force of the first lower discharge boxes (26), at least as long as the distance (H3, H1) between the corresponding lower discharge �