PROCESS FOR PRODUCTION OF A FIBROUS PULP WEB

摘要

A method for producing a fibrous pulp web, in which a fibrous pulp suspension is dewatered in a Twin Wire Former to form a fibrous pulp web which is dried with a TAD dryer. A pre-dewatering device with a hood and suction roll is provided after the Twin Wire Former and before the TAD dryer. The fibrous pulp web is guided through the pre-dewatering device between exactly two machine cloths. The machine cloth between suction roll and the web is a porous felt, and the machine cloth between web and hood is a structured wire. A volume flux of hot drying fluid greater than 100 m3/(m2min), preferably greater than 250 m3/(m2min,) is drawn through the fibrous pulp web into the suction roll.

主权项

1. The method for producing a fibrous pulp web, comprising:
dewatering a fibrous pulp suspension between forming wires in a Twin Wire Former to form a fibrous pulp web; conveying the fibrous pulp web from the Twin Wire Former to a pre-dewatering device including a hood and suction roll where the fibrous pulp web is guided on the suction roll only between a felt on the suction roll and a wire between the fibrous web and the hood; in the pre-dewatering device, drawing a volume flux of hot drying fluid greater than 100 m3/(m2.min) through the fibrous pulp web into the suction roll; and following the pre-dewatering device, drying the fibrous pulp web in a hot-air dryer on a structured wire and TAD drum.