Basic structure of paper machine

Paper machines generally consist of components such as flow, forming, pressing, drying, finishing, coiling and transmission, and auxiliary systems and other supporting equipment.

Surface finishing department of paper machine. Use multiple processes to achieve good surface quality. After the paper machine, most paper is calendered by a mechanical calender to make the paper surface smooth and consistent. The mechanical calender is made of several cold cast iron rollers, and the paper is flattened by the weight of each roller or another pressure. If higher surface smoothness is required, use a super calender for calendering. It is generally composed of paper meal rolls and chilled cast iron rolls arranged alternately. According to different requirements, some varieties need surface sizing to improve surface quality; some need surface coating to improve appearance quality or printing quality. Surface sizing and coating can be processed by a sizing machine and a coating machine outside the paper machine, or the sizing machine and coating equipment can be combined in the paper machine for in-machine processing.

The transmission system of the paper machine connects all parts of the paper machine to operate synchronously, so that the mechanical and electrical components are integrated. It is composed of mechanical deceleration device, speed regulation and speed stabilization device, sub-transmission device, etc., all of which use electric power as the power source.

The white water system of the paper machine is a recovery, treatment and reuse system for the dehydration of the forming section of the paper machine. Including white water collection, transportation, filtration or sedimentation, air flotation and other equipment to separate and recycle fibers and fillers for reuse, and the entire system that recycles clean white water in the papermaking process.

The auxiliary system of the paper machine is composed of electrical system, vacuum system, lubrication system, workshop steam supply and exhaust system, waste paper treatment, compressed air system, steam supply, water supply and drainage system.