The current situation and development of waste paper processing in China

The utilization and disposal of waste paper in China in the 1970s was through simple cooking, sizing, pulping, washing, and copying or copying toilet paper and low-grade foil cardboard. 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 companies 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.

Some of the larger cardboard manufacturers use imported waste paper and imported deinking equipment and technology to produce high-end products. Such as Shanghai Hongwen Paper, Fujian Qingzhou Paper Mill, Liaoyang Industrial Paperboard Factory, Anhui Wuhu Oriental Board Paper Mill, etc., using imported waste corrugated carton, the use of thermal dispersion or cold-sieving treatment of recycled pulp as the core, the bottom of the pulp, in the introduction On the production line or the original imported paper machine, the production of kraft boxboard and blending paper bag paper and other varieties. Not only the quality and grade are high, but also the imported corrugated paper contains adhesives and impurities that may affect the production and cause paper diseases, and can also effectively handle it, ensuring the normal operation of the production line. The enterprises represented by Guangzhou Paper Co., Ltd., Zhonghua Paper Co., Ltd. and Fujian Nan Paper Co., Ltd. imported deinking production lines or main equipments from foreign countries respectively, adopted a flotation-washing synthesis method, and processed old newspapers and old magazine papers. . Guangzhou Paper Mill and Fujian Nan Paper Co., Ltd. are similar to recycled pulp newsprint. 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.

Some domestic research institutes and production units have cooperated in the research and development of deinking technology and equipment. After utilizing the existing conditions of the company to innovate, the production of recycled pulp for small-batch waste paper has been successful. The manufacturers in Xuchang, Jiaozuo, Jixian, Xinxiang and other places in Henan Province have made significant use of imported AOCC and other papers to copy high-strength corrugated paper and cardboard.

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 used cardboard 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.

Domestic equipment manufacturers and chemical production and research institutes have achieved very good results in equipment performance and chemical quality through cooperation. For example, the Hangzhou Light Industry Research Institute developed 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 Plant has formed a series of matching products and successfully invested in production. Some papermaking machinery factories in Shandong also produced different types of deinking equipment that have already been purchased by manufacturers. In addition, various types of deinking agents researched and developed by Fujian Papermaking Institute, Hangzhou Chemical Research Institute, and Tianjin University of Science and Technology have also been recognized by users.

Industry insiders have made several suggestions on how companies can properly 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 situation of more supply channels, must be more cautious. Enterprises must conduct a comprehensive inspection of the operating waste paper suppliers to understand the source of supply, economic strength, and creditworthiness so as to avoid being deceived.

2. Companies with strong financial and technical strengths can purchase foreign old corrugated cardboard boxes, old magazine papers, and old newsprint papers. They can also import existing deinking technologies and equipment, including production lines, to produce high-quality recycled pulp and products of superior quality. . For enterprises that already have straw pulp alkali recovery, they can also use imported waste paper recycled pulp to add straw pulp, commercial wood pulp, and copy high-grade cultural paper in proportion.

3. For paper mills that have been shut down or have no hope of pollution control, they can invest a small amount of funds to improve the original equipment, use domestic waste paper to produce low-grade toilet paper, ordinary corrugated paper, or recycled newsprint; they can also use domestic and imported waste paper pulp. With copying high-end products, it will be possible to get out of trouble.

4. When enterprises purchase waste paper, they should use their own equipment status, technical strength, production varieties, etc. Can use imported corrugated cartons, AOCC waste paper to produce high-grade cardboard, high-grade corrugated cardboard and paper bags, or as core pulp and bottom-pulp material for the production of white paperboard; using waste newspapers plus about 30% of old magazine paper, after floating After selecting-washing integrated deinking, production of newsprint or white pulp core pulp and bottom lining; use of imported office waste paper, such as copy paper, computer printing paper, etc., choose a new deinking method, improve the paper Machines or imported production lines, producing high-grade sub-culture printing paper. The domestic waste paper purchased can produce medium and low-grade linerboard and toilet paper. At the same time, when using recycled paper to recycle paper, attention should be paid to the use of chemical additives to make up for the lack of indicators such as the physical strength of paper products.