Speed ​​up the process of localization of papermaking equipment to adapt to the development of papermaking industry in the new era
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2. The main products currently available The full set of chemical pulping equipment with an annual output of 70,000 tons or less, including a full set of non-wood fiber horizontal pipe continuous cooking equipment with a daily production capacity of 50-150 tons; waste paper processing pulp production line, OCC single wire Production capacity of 150 tons / day or less, ONP / OMP single-line production capacity of 100 tons / day following equipment; annual output of 3.5-10 million tons of wood pulp mill and an annual output of 2.5-5 million tons of non-wood fiber pulp mill full set Alkali recovery equipment; an annual output of 80,000 tons of papermaking equipment, width less than 5000 millimeters, speed of 700 meters / min within a variety of width and speed of the long-network multi-cylinder culture paper machine. A web board with a width of up to 5000 mm and a speed of 400-800 m/min. With a width of 3520 mm and a speed of 250-450 m/min, lightweight coated paper machines. With a web width of 2700 mm or less, the speed is greater than 1200 meters per minute. Width less than 4,200 mm, white board coater, coated paper coater.
3. Product Level and Gap A group of more advanced products that meet China's national conditions have been developed. There are mainly the following aspects. Suitable for non-wood fiber cross-tube continuous cooking complete equipment (including wet preparation); new internal and external flow pressure screen (including corrugated plate structure); new drum vacuum pulper (including corrugated plate structure); full plate and plate tube Combined evaporator system equipment; Large-scale alkali recovery jet furnace (including single boiler odorless furnace); Pre-mounted white mud filter; Adopt a variety of new headboxes, stacking nets, fully enclosed threading, various combinations The composite press, large roll wide nip, bag ventilation, all-digital high-precision electronic control system for the paperboard, cardboard machine; rod coating, air knife coating, blade coating and various combination coating head, with high-strength hot air Drying technology coating machine and high speed light applicator; suitable for OCC, ONP/OMP waste paper processing pulping production line equipment (including deinking equipment).
These products are well adapted to the general needs of the paper industry. However, on the whole, China's papermaking machinery products are still basically in the early and mid-1980s, with small product specifications, low speed, poor automation, and poor adaptability to process performance, especially the lack of adaptation to wood The main large-scale pulp and paper mills and high-grade paper production require large-scale, high-efficiency, high-quality, high-level automation products.
Second, the paper industry development trend and its requirements for equipment The development of localized papermaking equipment related structural adjustments are:
* Raw material structure. Gradually realize the use of wood fiber, expand the recycling of waste paper, and scientifically and rationally use non-wood fiber diversified raw material structure.
*Enterprise structure. Realize the conglomeration of large-scale enterprises, the characteristics of small and medium-sized enterprises, and put forward requirements for the minimum limit of the scale of enterprises. The minimum limit of enterprise size: 10 tons/year of wood pulp paper mills; 350,000-50 thousand tons/year of grass pulp and paper mills; 0.5 million tons of special paper and paperboard factories - 1 million tons/year or more; chemical wood pulp mills: Newly-built or expanded pulping production scale of 300,000 tons/year or more; non-wood pulp mills: chemical pulp of raw materials such as reeds, bagasse, bamboo, etc., and new or expanded pulping production lines with a scale of 50,000 tons/year or more. Wheat straw chemical pulp mill: Newly built and expanded pulp production line with a scale of 34,000 tons/year.
* Technical structure: Accelerate technological and technological innovation, and promote the gradual modernization of technology and equipment. Focus on the development of high-strength, high-yield, low-pollution and pollution-free pulping technology. The papermaking industry focuses on the development of low-quantity, high-quality, low-consumption, high-efficiency production technologies. Other applicable technologies for the development of new materials, new pulp types, various chemical additives, coatings, waste paper processing, fiber recycling, pollution prevention, and environmental protection.
*Product Structure: Paper and paperboard products have been developed to thin, high-quality, high-quality products. From the perspective of the papermaking equipment required for the technological transformation projects of more than 20 key papermaking companies supported by the national debt, because localized equipment cannot be provided yet, it still needs to continue to rely on imports.
Third, the focus of the current development of domestic equipment Key development of the main products:
Pulping: To adapt to the diversified characteristics of papermaking raw materials, it focuses on the development of 100,000 to 300,000 tons of wood chemical pulping production line equipment and annual output of 5-10 million tons of non-wood based on continuous cooking and energy-saving batch cooking. The chemical pulp production line equipment mainly uses cross-tube continuous cooking; it is suitable for the production of chemical thermomechanical pulp production line with an annual output of 34-5 million tons of poplar, birch, beech etc. 150,000 tons waste cardboard paper and waste newsprint, magazine paper processing and deinking production line equipment; CLO2 preparation equipment suitable for large pulp mills; medium and high concentration H2O2 bleaching equipment; chemical recovery equipment for pulping waste liquid should be Focusing on improving the alkali recovery rate and reducing energy consumption, we will focus on the development of black liquor heat treatment, black liquor removal of silicon, and new types of high-efficiency energy-saving lime kiln equipment.
Paper coating and finishing equipment: focus on the development of large-scale, high-speed, high-quality, offset printing newsprint paper, low-quantitative newsprint paper, offset book and paper, kraft boxboard, high-grade coated paper, high-grade coated white paperboard, lightweight coated paper, etc. Low consumption medium and high speed paper machine and board machine. With a width of 5.5 meters or less and a speed of 800-1200 meters per minute (emphasis on the development of hydraulic headboxes), it is suitable for medium and high-speed pulp machine systems; width is within 5.5 meters and speed is 600-1200 meters per minute. Coater; Rewinder with a width of 5.5m or less, a speed of 2500m/min or less; a soft calender with a width of 5.5m or less and a speed of 800-1200m/min; adaptable width within 5.5m , Controllable high and medium rollers with a speed of 800-1200 m/min; Cutters with a width of 2.5 meters or less, a speed equal to or greater than 200 meters per minute; Automatic web-packing production lines for reel paper and automatic packaging production lines for ream paper.
4. Several Considerations and Suggestions for the Development of Localized Equipment 1. Accelerate the development process of domestic equipment by taking advantage of advanced foreign experience and increasing self-development efforts. First, with the strong support of the country, seize this great opportunity for the introduction of technology and do a good job of introducing technology. With their mature technologies, China will speed up its development. On the one hand, we must pay attention to the introduction of technology should be both advanced, but also suitable for the national conditions of technology, we must do what we can do to prevent excessive urgency, resulting in indigestion, but not speed. The second is to increase self-development efforts. It should be said that our technical personnel have accumulated a lot of rich experience in the past long-term practice, and their ability to develop themselves is also very strong. The problem is to create necessary conditions for them. The first is the investment in development funds, and the second is the establishment of necessary product development test methods.
2. Equipment manufacturing companies must break the closed development mechanism and strengthen the cooperation with universities and research institutes to form a product development mechanism integrating production, learning and research. Give full play to their respective advantages, cooperate in division of labor, concentrate on overcoming difficulties and speed up the development process.
3. It is necessary to further improve the rationality and economy of the manufacturing process, and strive to increase the degree of automation of the processing process. In particular, the processing of key components should use CNC machine tools or special equipment as much as possible. Fully rely on self-control to ensure processing accuracy.
4. Fully rely on the social forces and give play to the spirit of great cooperation. Break through the big, small, and overall situation, and rely on the advanced processing capabilities of military and mechanical industries to solve their own processing difficulties.
5. Actively promote the specialized production of spare parts and form a batch of characteristic and high-quality parts production systems. The host manufacturer must break the concept of closed-end production and devote its main energy to the processing of key parts and the overall synthesis capability of the complete machine or the entire system.
6. The qualified host manufacturing enterprises should fully consider and use their own technological advantages or branded products as the mainstay, use the market mechanism, and use capital as the link to operate in an enterprise group development mode. Form cross-regional, cross-industry, cross-ownership enterprise groups.
7. To develop new products in close cooperation with users, keep abreast of the problems found in the use of users, keep track of them, provide timely feedback, and immediately improve.
8. Qualified companies should actively develop various forms of cooperation with foreign brand manufacturers, such as co-manufacturing or joint ventures or the establishment of maintenance centers or cooperative research and development.
9, the introduction of talents and sent abroad training and other forms to create a number of high-level technical team. (Paper Weekly)