People are accustomed to disposing of waste paper as rubbish. However, many people do not know that it is such waste paper that China needs a large number of imports from abroad every year.
The utilization and disposal of waste paper in China in the 1970s was through simple cooking, sizing, beating, and washing, and was used to copy or match toilet paper and low-grade boxboard. By the 1980s, the recycling rate of waste paper had reached about 25%, and a few manufacturers could also produce deinked pulp. After entering the 1990s, some large and medium-sized paper-making enterprises have successively introduced deinking equipment and technologies including production lines from abroad, and made targeted improvements and innovations in waste paper deinking agents and waste paper deinking equipment. China's waste paper processing technology and equipment assembly level can be fully developed.
According to professionals, waste paper is the preferred raw material for papermaking, and the highest recycling rate is up to 80%. Compared with wood-based papermaking, it not only reduces environmental pollution, but also greatly reduces the damage to the ecological environment. It uses waste paper as raw material for papermaking per ton. It can save 2 to 3 cubic meters of wood, 400 kilograms of coal, 400 kwh electricity, and 300 tons of water.
Waste paper utilization must be high technology and high starting point. In recent years, we have introduced more than 40 sets of waste paper production and processing equipment. In 2000, we invested more than 10 million US dollars and introduced 4 sets of equipment. It can be said that the internationally advanced waste paper processing technology and equipment are already available to us. If a qualified group company introduces advanced foreign equipment, it should participate in international competition at a high starting point, high standards, and high levels.
1. Some of the larger cardboard production companies use imported waste paper and imported deinking equipment and technology to produce high-end products. For example, Shanghai Hongwen Paper, Fujian Qingzhou Paper Mill, Liaoning Liaoyang Technology Paperboard Factory, Anhui Wuhu Oriental Board Paper Mill, etc., use imported waste corrugated boxes, and use recycled pulp treated by thermal dispersion or cold screening as the core and bottom layer pulp. In the introduction of the production line or the original improvement of the paper machine, the production of kraft box cardboard and blending paper bag paper and other varieties. Not only the quality is high, but also the imported corrugated paper contains adhesives and impurities that affect the production and is prone to paper diseases. It can also effectively handle and ensure the normal operation of production.
2. The enterprises represented by Guangzhou Paper Co., Ltd., Zhonghua Paper Co., Ltd. and Nanping Paper Mill have imported deinking production lines or main equipments from abroad and adopted flotation--washing synthesis method to dispose of old newspapers and old magazine papers. . The Guangzhou Paper Mill and Nanping Paper Mill used copying newsprint paper with recycled pulp. The Ningbo Zhonghua Paper Co., Ltd. uses waste paper recycled pulp as the core and bottom pulp, and produces coated white paperboard. Both have achieved good results.
3. Some domestic research units cooperated with production units to research and develop de-inking technology and equipment. After utilizing the existing conditions of the company to innovate and reform, the production of recycled pulp of small-batch waste paper was successful. For example, Guangdong Zhongfa Paper Factory cooperates with the China Pulp and Paper Research Institute to produce newsprint with 100% old newspapers. Manufacturers in Xuchang, Jiaozuo, Jixian, and Xinxiang of Henan Province use imported AOCC and other waste papers to copy high-strength corrugated paper and Boxboards are very effective.
4. Small and medium-sized enterprises such as Fuzhou No. 2 Paper Mill and Nanning Xinyang Paper Mill use domestic equipment and technology to dispose of old newspapers and old paperboard to produce toilet paper and low-grade white paperboard. Hebi Paper Mill in Henan Province slightly modified the original equipment and used old newspapers to produce recycled newsprint. Xuchang, Yanshi's papermaking street, uses waste paper to produce toilet paper. Some paper mills in Xinmi City have made good use of domestic old cartons to produce mid- and low-end products such as boxboard and kraft liner paper.
5. The domestic equipment manufacturers and chemical production and research units have achieved good results in equipment performance and chemical quality through cooperation. For example, Hangzhou Light Industry Research Institute cooperated with Zhejiang Xinshi Paper Mill to develop a small waste paper treatment process and waste paper deinking system. The waste paper processing equipment researched by Liaoyang Paper Machinery Factory and Fujian Light Industry Machinery Factory has formed a series of products and successfully put into production. Some papermaking machinery factories in Shandong also produced different types of deinking equipment that have already been purchased by manufacturers. There are also various deinking agents researched and developed by Fujian Papermaking Institute, Hangzhou Chemical Research Institute, and Tianjin University of Science and Technology, which have also been recognized by users.
Industry insiders also made several suggestions on how to reasonably recycle and use waste paper:
1. When purchasing raw materials for waste paper, it should be strictly controlled. In particular, imported waste paper, in the current supply of more channels, unpredictable operating methods, we must act with caution. The enterprise must conduct a comprehensive inspection of the operating waste paper supplier to understand the true status of the business unit, the source and supply of the supply and sales, the economic strength, the degree of credit, etc., choose a reliable credit supply partner, and agree to supply the goods, so as to avoid being deceived, resulting in Due economic loss.
2. For enterprises with considerable scale, strong financial strength and strong technical force, they can import foreign existing corrugated cardboard boxes, old magazine papers, and old newsprint papers, as well as the existing foreign deinking technologies including production lines. And equipment, production of high-quality recycled pulp, alternative wood pulp fiber, production of high-grade multi-variety products. This will not only be conducive to environmental governance, but also significantly increase the efficiency. For enterprises that already have straw pulp alkali recovery, they can also use imported waste paper recycled pulp to add straw pulp and commercial wood pulp, and copy high-grade cultural articles in proportion, which can reduce the pollution load, save pollution control costs, and reduce production costs.
3. For paper mills that have been shut down or have no hope of shutting down for pollution control, a small amount of funds can be invested to improve the original equipment. The use of domestic waste paper to produce low-grade toilet paper, ordinary corrugated paper, or recycled newsprint can also be used. The distribution of domestic and imported waste pulp with medium-to-high grade products will likely lead to a vicious circle of raw material shortages and difficulties in pollution control.
4. When purchasing waste paper, the company shall use its own equipment, technology, and production categories to classify and use it. Can use imported corrugated cardboard boxes, AOCC waste paper to produce high-grade foil cardboard, high-strength corrugated paper and paper sack paper, or as core and bottom layer pulp for the production of white paperboard; use old newspapers and add about 30% of old magazine paper, and float --- After washing the integrated deinking, the production of newsprint or white pulp core pulp and bottom lining; the use of imported office waste paper, such as copy paper, computer printing paper, etc., use a new deinking method, in the improvement of paper Machines or imported production lines produce high-grade sub-culture printing paper; domestic waste paper purchased can produce medium and low-grade cardboard and toilet paper. At the same time when using recycled paper to recycle paper, attention should be paid to the use of chemical additives in order to enhance the lack of indicators such as physical strength of paper products.
5. Domestic machinery manufacturers, chemical manufacturers, paper-making companies, scientific research institutes and other related companies united to jointly develop advanced deinking equipment and deinking agents, enhancers and other chemicals, and continuously improve the use of waste paper to recycle papermaking equipment. The adaptability of equipment level and paper variety promotes the rapid development of waste paper utilization.
High starting point and high-tech development of waste paper making, reasonable recycling and utilization
December 22 06:08:23, 2023
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