The development of paper machine and pulp equipment in recent years

Internationally, modern papermaking machinery and papermaking pulp equipment are developing rapidly, and the degree of automation is getting higher and higher. At present, a single chemical pulp production line has a production scale of 600,000 t/year, and a single paper machine has a production capacity of 400,000 t/year. A high-speed wide paper machine with a width of 2800m/min and a width of 10m has been used in production.

At present, most of the papermaking machinery and papermaking pulp equipment needed by large-scale papermaking enterprises in our country rely on imports, with a daily output of 420t waste paper pulp and a daily output of 250t deinked pulp production equipment, a daily output of 300t and a daily output of 450t chemical wood pulp production equipment, and a daily output of 120t. Continuous digester, RDH batch digester with a daily output of 150t, CTMP pulp production equipment with an annual output of 70,000 tons, APMP pulp production equipment with an annual output of 65,000 tons, CMP pulp production equipment with an annual output of 60,000 tons, and 100,000 tons of medium-high consistency pulp Both oxygen bleaching and chlorine dioxide bleaching equipment have been introduced in China.

In terms of paper machines, domestic newsprint machines have reached the level of 5590mm width, 1800m/min, 8600mm, and 1000m/min. Some newsprint machines have a production capacity of nearly 200,000 tons per year; the imported toilet paper machines are produced. The capacity reaches 100t/d, the vehicle speed is 2200m/min, and the width is 2700mm; the single-machine output of the imported coated white board machine has reached 350,000t/year. At the same time, the corresponding pulp conveying equipment and washing and thickening equipment were introduced, and the distributed control system (DS) and quality monitoring system (QCS) were introduced.

At the same time, due to the advancement of science and technology, the domestic papermaking machinery equipment and paper pulp equipment manufacturing industry has also mastered a number of core key technologies of large-scale paper pulping equipment, such as: horizontal tube continuous digester for non-wood pulp production, waste Complete set of production equipment for pulp, key equipment for oxygen bleaching and hydrogen peroxide bleaching of medium and high concentration pulp, key equipment for alkali recovery system, new environmental protection equipment, and various paper machines and coating machines using various new technology combinations, etc.

It can be seen that my country’s paper-making enterprises, especially large-scale paper-making enterprises, are becoming more modernized and automated. The machinery and equipment used in the pulping and papermaking process are new and advanced, which clearly reflects high-speed, high-quality, and high-efficiency And the advantages of environmental friendliness, and the situation of my country's papermaking machinery and papermaking pulp equipment 20 years ago, can no longer be compared.