Major technical challenges in promoting the sustainable development of the paper industry in terms of equipment

　　1. Method and equipment for separation of plant resources without black liquor: eg equipment for achieving organic solvent pulping technology

　　2. Single-end bleaching technology and equipment for combining oxygen delignification and bleaching section

　　3. Full-medium-concentration complete sets of technologies and equipment for chemical slurry pulping: In addition to currently available medium-concentration pulp transport, medium-thickness blending, medium-intensity bleaching, and mid-thickness laundering, it is also necessary to develop and implement mid-thickness screening. The medium-thickness pulping process equipment for medium and strong purification and medium-strength beating.

　　4, High-concentration deinking equipment: The concentration is above 3%, and it is even assumed that the deinking process is completed under the liquid state of medium concentration (7%).

　　5, waterless papermaking technology and equipment: the use of the principle of gas dynamics copy paper pages, can be used for paperboard and packaging paper first.

　　6, the economic research of high-speed paper machine: price, energy consumption

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