Current situation and development trend of waste p

2022-08-05
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Current situation and development trend of waste paper treatment in China the utilization and treatment of waste paper in China was used to make or prepare toilet paper and low-grade foil paperboard in the 1970s through simple cooking, dredging, beating and washing. By the 1980s, the recovery 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 on waste paper deinking agents and waste paper deinking equipment, so that China's waste paper utilization and treatment technology and equipment assembly level can be comprehensively developed

some large paperboard manufacturers use imported waste paper and imported deinking equipment and technology to produce high-grade products. For example, Shanghai Hongwen Paper Co., Ltd., Fujian Qingzhou Paper Mill, Liaoyang industrial Paperboard Factory, Anhui Wuhu Dongfang board paper mill, etc. use imported waste corrugated boxes and adopt recycled pulp treated by thermal dispersion method or cold screening method as the core and bottom layer. In order to achieve the same thermal insulation performance pulp, they produce Kraft linerboard and papermaking bag paper on the imported production line or the original imported paper machine. It not only has high quality and grade, but also can effectively deal with the adhesives and impurities in the imported old corrugated paper that affect production and are easy to cause paper diseases, ensuring the normal operation of the production line. The enterprises represented by Guangzhou Paper Co., Ltd., Zhonghua Paper Co., Ltd. and Fujian Nanping Paper Co., Ltd. that the materials for preparing drug packaging containers should be new materials, respectively introduce deinking production lines or main equipment from abroad, and adopt the comprehensive flotation washing method to treat old newspaper paper and old magazine paper. Guangzhou paper mill and Fujian Nanzhi Co., Ltd. are similar to recycled pulp for papermaking. Ningbo Zhonghua Paper Co., Ltd. used recycled waste paper pulp as core pulp and bottom pulp to produce coated white paperboard, and achieved good results

some domestic research and production units have cooperated to research and develop deinking technology and equipment. After innovation with the existing conditions of the enterprise, the production of small batch of recycled pulp of waste paper has been successful. The factory test projects in Xuchang, Jiaozuo, suixian, Xinxiang and other places in Henan Province are relatively simple. The effect of using imported AOCC and other waste paper to make high-strength corrugated paper and carton board is remarkable

small and medium-sized enterprises, such as Fuzhou No. 2 paper mill and Nanning Xinyang paper mill, use domestic equipment and technology to treat old newspapers and cardboard and produce toilet paper and low-grade white cardboard. Hebi paper mill in Henan Province has slightly reformed its original equipment to produce recycled paper from old newspapers. The papermaking street in Xuchang and Yanshi uses waste paper to produce toilet paper. Some paper mills in Xinmi City have made good profits in using domestic old cartons to produce medium and low-grade products such as carton board and kraft face paper

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 has developed a small waste paper treatment process and waste paper deinking system. The waste paper treatment equipment researched by Liaoyang paper machinery plant and Fujian Light Industry Machinery Plant has formed a supporting series and has been successfully put into production. Some paper machinery factories in Shandong have also produced different types of deinking equipment, which have been purchased and used by manufacturers. In addition, various deinking agents developed by Fujian paper research institute, Hangzhou Institute of chemical industry, Tianjin University of science and technology and other units have also been recognized by users

insiders put forward several suggestions on how to reasonably recycle and utilize waste paper:

1. strictly control the purchase of waste paper raw materials. In particular, the import of waste paper, in the current situation of more supply channels, we should be more cautious. The enterprise must conduct a comprehensive investigation on the waste paper suppliers to understand the source of supply, economic strength, reputation, etc., so as to avoid being cheated

2. enterprises with strong financial and technical strength can purchase foreign old corrugated boxes, old magazine paper and old paper, and can also introduce foreign existing deinking technologies and equipment including production lines, which are mixed on a 170 ℃ double roller plasticizer for 5min, to produce high-quality recycled pulp and high-grade products. For enterprises that have already recovered straw pulp alkali, they can also use imported waste paper recycled pulp to add straw pulp and commercial wood pulp, and prepare high-grade cultural paper in proportion

3. for paper mills that have been shut down or have no hope of pollution control, a small amount of money can be invested to slightly improve and transform the original equipment, and domestic waste paper can be used to produce low-grade toilet paper, ordinary corrugated paper or recycled paper; Domestic and imported waste pulp can also be used to make medium and high-grade products, which will be possible to get out of the dilemma

4. when purchasing waste paper, enterprises should use it according to their own equipment conditions, technical strength, production varieties, etc. The imported corrugated boxes and AOCC waste paper can be used to produce high-grade carton board, high and medium grade corrugated paper and paper bag paper, or used as the core pulp and bottom pulp for the production of white paperboard; The waste newspaper is added with about 30% of the old magazine paper. After flotation washing and comprehensive deinking, paper is produced or used as the core pulp and bottom lining pulp of white paperboard; Using imported office waste paper, such as copy paper, computer printing paper, etc., select new deinking methods to produce high-grade cultural printing paper on improved paper machines or imported production lines. The purchased domestic waste paper can be used to produce medium and low grade box paperboard and toilet paper. At the same time, attention should be paid to the use of chemical additives to make up for the lack of physical strength of paper products

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