The structural of paper machine

The structural of paper machine:

       A paper machine can be seen as a linkage machine composed of multiple devices. It is usually divided into two main parts: the wet part and the cadres. The wet section includes slurry flow equipment, mesh section, and pressing section; the dry section includes drying section, calendering machine, and paper winding machine.

       The pressing section of a paper machine is composed of several sets of roller presses. The wet paper web is pulled by a press blanket and dehydrated through mechanical squeezing between press rollers. In order to maintain good dewatering performance of the pressed blanket, the upper roller of the press is equipped with a blanket washing device. After passing through the pressing section, the dryness of the wet paper web can generally reach around 40%.

       Wet paper webs are typically further dehydrated on paper machines through heating, evaporation, and drying. The drying section of a paper machine usually consists of many drying cylinders heated internally by steam. The dryer is covered with a dry blanket (or canvas, dry mesh) to tightly press the paper web onto the surface of the dryer, thereby improving heat transfer efficiency and surface quality of the paper web. After drying, a 6-8 roll calender is usually used to improve the surface quality of the paper web. Types, production processes, and structural principles of paper machines.