Increase The Operation Speed Of Paper Machine
The increase operation speed of paper machine means that the paper wire needs to be dried quickly in the dryer section, which imposes higher requirements on the dryer section of the paper machine. The drying section generally must meet the following performance requirements.
After the wet paper leaves the press section, it is stably adsorbed to the dryer wire. Through the combination of the paper web stabilizer and the vacuum roller in the whole dryer section, the transfer of the paper web is completed safely and reliably, which greatly reduces the paper web in the dryer section. Thereby improving the running performance of the paper machine.
High evaporation rate
Due to the equipment characteristics of the dryer section, the wet paper sheet can effectively obtain heat from the surface of the dryer, and remove or emit the water vapor evaporated from the paper sheet, and in this process, the energy is well controlled.
Control paper shrinkage
In the initial drying stage of the paper web, due to the increase in the temperature of the paper web, the strength of the wet paper sheet decreases, and the elongation of the paper web increases. When the paper web is stretched, its longitudinal direction will be stretched, and the transverse direction will shrink.
However, modern high-speed paper machines reduce the force required when the paper web is peeled from the surface of the dryer through the web stabilizer, thereby reducing the longitudinal elongation and lateral contraction of the paper web.
Due to the short dryer group, the elongation of the paper web in the wet end can be compensated by adjusting the speed difference, thus preventing the paper from running out of folding.
Prevent paper curl
Single-sided drying paper webs are easy to curl, which is caused by uneven moisture distribution between the front and back sides of the paper web in the dryer section, and the paper web curls toward the side that is finally dried.
This problem can be controlled by adjusting the humidity distribution on both sides of the paper web, which can be treated either in the front drying process or in the later process.
Of course, if you want to increase the speed, it is obviously not enough to improve the dryer section. As a system, the paper machine must be reasonably optimized in all aspects in order to exert the best performance of the paper machine.
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