Rear drying system used for multi-cylinder long mesh paper machine

Abstract

The invention discloses a rear drying system used for a multi-cylinder long mesh paper machine, and belongs to the field of accessories of paper making equipment. The rear drying system is suitable for being used for production of high padding paper pulp. The total number of drying cylinders of a rear drying portion is increased by 20%-50% than that of drying cylinders of a rear drying portion of a traditional paper machine with the same width and the same vehicle speed, and a reinforced drying device can be arranged at an inlet of the rear drying portion; the high padding paper pulp can be made into paper capable of being used; the rear drying system has the advantages that drying time is long, drying efficiency is good, paper is sufficiently dried and dehydrated, calendaring is facilitated, quality of finished production paper is high, and it is guaranteed that the whole paper machine system can stably operate for a long time; the defect that the tradition rear drying system is used for production of the high padding paper pulp is overcome.

Description

technical field [0001] The invention discloses a post-drying system used on a fourdrinier multi-cylinder paper machine, which belongs to the field of papermaking equipment accessories, and is suitable for use on a fourdrinier multi-cylinder paper machine produced by high-filler paper, and is especially suitable for use on a fourdrinier multi-cylinder paper machine produced with active silicon On the fourdrinier multi-cylinder paper machine with calcium acid as paper filler. Background technique [0002] The paper industry is one of the industries with high environmental costs and large actual demand in China (and the world) today. Although the Internet technology is advancing by leaps and bounds, with the rapid development of China's economy and the continuous advancement of the global economy, China and the world have a high demand for paper products. The total demand of China has not changed, but also increased slightly. The demand for paper products means the demand for p...

AI Technical Summary

Problems solved by technology

[0008] 1. The high-filler pulp itself is difficult to dry and dehydrate, and the high-filler paper has a large amount of sizing. However, the total number of drying cylinders in the traditional post-drying system area is small, and the length of the drying area is short, which makes the wet paper sheet stay in this area for a short time. , the drying temperature is low, and the degree of paper drying and dehydration is insufficient, which is not conducive to calendering

[0009] 2. Since high fillers (such as calcium silicate fillers) are mostly loose void structures, moisture is not easily volatilized directly by heating. Therefore, the rear section of the full double-row dryer in the traditional post-drying system directly heats and dries the structure, resulting in high The dehydration speed of the filler paper and its sizing layer is slow, the expansion rate of the paper is relatively large, the drying effect of the paper sheet and the sizing layer is poor, it is not conducive to the follow-up treatment such as calendering, and the whole paper machine system cannot run stably for a long time

Images