A fourdrinier multi-cylinder paper machine for producing high-filler paper

Abstract

The invention discloses a multi-cylinder long mesh paper machine used for producing high-filler paper. Compared with a traditional multi-cylinder long mesh paper machine with the same width and the same speed, the whole multi-cylinder long mesh paper machine is 8-25 meters longer, the mesh portion is 4-6 meters longer, the front drying system portion is 5-15 meters longer, and the rear drying system portion is 1-1.5 meters longer. Accordingly, corresponding structures are changed, the problem that the traditional paper machine can not manufacture cultural paper which meets the standards through high-filler paper pulp is solved, and the multi-cylinder long mesh paper machine has the advantages of being long in dehydration time, high in dehydration efficiency, good in dehydration quality, low in investment, good in drying effect and high in paper product quality.

Description

technical field [0001] The invention discloses a fourdrinier multi-cylinder paper machine for producing high-filler paper, which belongs to the field of papermaking process equipment and is suitable for producing high-filler paper, especially for producing paper with active calcium silicate as paper-making 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 paper pulp, and the growth rate of forests for paper pulp is much lower than the demand and consumption speed of paper pulp. On the premise that the total output of...

AI Technical Summary

Problems solved by technology

Among them, the fourdrinier multi-cylinder paper machine is the mainstream model of the paper machine, which can make most of the paper varieties. The traditional fourdrinier multi-cylinder paper machine can prepare conventional filler pulp into paper that meets the standard. The problem is that it cannot be well Prepare high-filler pulp into standard cultural paper

[0007] 1. The filler retention rate of high-filler pulp is higher than that of traditional pulp, and the water filtration performance of the wire part is worse than that of traditional ordinary fillers. The dehydration effect of high-filler pulp on traditional paper machine screens is not good;

[0008] 2. Since the free dehydration performance of high-filler pulp is weaker than that of traditional filler pulp, stronger external auxiliary dewatering measures are required, while the forced dewatering components such as dry and wet vacuum dewatering boxes of traditional fourdrinier multi-cylinder paper machines are suitable for easier dehydration. Dehydration of ordinary filler pulp is not suitable for forced dehydration of high filler pulp, so that the dehydration of high filler pulp in the forced dehydration area is insufficient, the humidity of the wire outlet is high, the forming is poor, and the dryness is too low;

[0009] 3. In the papermaking process, the high-filler paper out of the press section is rich in loose and porous calcium silicate fillers. It is difficult to remove moisture during the drying process, and water molecules are easy to remain in the gaps, while the traditional Fourdrinier has more The drying section of the cylinder paper machine is suitable for drying ordinary filler paper sheets that are easy to dehydrate and dry, but not suitable for removing moisture from high-fill wet paper sheets, resulting in low dryness of paper sheets before sizing and at the roll paper , fail to meet the process requirements, affecting the quality of the finished paper machine

Images