2021 Volume 75 Issue 9 Pages 812-816
Situation of automatically paper machine operation with high speed ask more efficiency energy cost more stable operation. The main role of press part is removing wetting mechanically before dry part. This is very important because of the amount of water dewatered in the press part affects heat consumption and cost in the subsequent dry part. Further, when dewatering efficiency in press part is quite good, the strength of the wet paper is increased, and trouble due to paper break and wrinkles are less likely to occur. Paper quality also regarded important because it require less difference in density between top and bottom surface, and smoothness and bulkiness of surface.
In this section, according to the required role of the press part, I focus on changing the basic form of the press part and changing press type to improve water removal and operation. And introduce shoe press, equipment, latest trend.