With the rapid development of the national economy, especially the modern culture and information industry, the industry position of the paper industry is becoming more and more important. China's paper industry cannot meet the needs of the market and has become one of the few industries in the country with total shortages and increasing demand. At present, per capita consumption of paper in our country is less than half of the world average. The market potential of papermaking is huge and it is urgent to develop. At present, the state attaches great importance to the development of the paper industry, and relevant departments are formulating development plans to make structural adjustments to the paper industry. The modernization of the paper industry puts forward higher requirements for papermaking equipment, and the current status of papermaking equipment production in China is far from meeting this requirement. Here, we will focus on issues related to promoting the localization of papermaking equipment.
1. Brief review of production status of papermaking equipment 1.1 Basic situation According to incomplete statistics, the total output of pulp and paper machinery in the country is about 120,000 tons (including spare parts production). Every year, the paper industry can provide complete sets of equipment that can produce 1 million to 1.2 million tons of production capacity. The country is engaged in the production of papermaking equipment, scientific research, development, design, and colleges and universities (including professional production plants) nearly 500, distributed in 25 provinces and cities across the country. Among them, Shanghai, Shandong, Jiangsu, Liaoning, Hubei, Hunan, Henan, Fujian, Shaanxi, Sichuan and other provinces and cities are the main production areas, and their total production accounts for about 90% of the total output.
1.2 The main product status currently available â— The full set of chemical pulping equipment with an annual output of 70,000 tons or less includes a full set of non-wood fiber horizontal pipe continuous cooking equipment with a daily production capacity of 50 to 150 tons.
â— Waste paper processing pulp production line OCC single line production capacity of 150 tons / day following equipment;
ONP/OMG single line production capacity 100 tons/day following equipment.
â— The annual output of 35,000-100,000 tons of wood chemical pulp mills and the annual output of 25,000-5 million tons of non-wood fiber chemical pulping plants, a full set of alkali recovery equipment â— Annual output of 80,000 tons of papermaking equipment below the width of 5000 mm , Multi-cylinder multi-cylinder paper machines with various widths and speeds within 700 m/min;
Width less than 5000 mm width, speed 400 ~ 800 meters / minute long board board machine;
Width 3520 mm width, speed 250 ~ 450 m / min light coating machine;
Width less than 2700 mm, speed <1200 m/min tissue paper machine;
Width less than 4,200 mm, white board coater, coated paper coater.
1.3 Product Level and Gap For a long time, China's paper industry is basically medium and small paper mills. China's pulp and paper machinery manufacturing industry also basically determines the production plan of these small and medium-sized paper mills and technological transformation needs. With the in-depth development of reform and opening up, the readjustment of the scale structure of the paper industry, in order to meet the needs of the development of the new situation, during the "6th Five-Year Plan" and "Seventh Five-Year Plan" period, a group of more advanced products that meet China's national conditions have been developed. There are mainly the following aspects.
â— Suitable for non-wood fiber horizontal tube continuous cooking equipment (including wet preparation)
â— New type of internal and external flow pressure screen (including corrugated plate structure)
â— New type drum vacuum washer (including corrugated board structure)
â—Full-plate and plate-and-tube combined evaporator system equipment â—Large alkali recovery jet furnace (including single boiler odorless furnace)
â— Pre-mounted white mud filter â— Adopts various new headboxes, stacking nets, fully closed draws, various combinations of composite presses, large rolls, wide nip, bag ventilation, all-digital high-precision electronic control system Culture Paper Machines and Board Machines â—Using bar coaters, air knife coaters, blade coaters and various combination coating heads, coaters with high-strength hot air drying technology, and high-speed light applicators â— Suitable for OCC, ONP/OMG waste Paper processing pulping line full set of 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-80s levels, with small product specifications, low speed, poor automation, and poor adaptability to process performance, especially the lack of adaptation to wood-based products. Large-scale, high-efficiency, high-quality, high-level automation products are needed for large-scale pulp and paper mills and high-grade paper production. In terms of pulping, the vertical continuous cooking equipment suitable for wood pulping has not yet become a climate. The high-level large-capacity production system for chemical mechanical pulping equipment and the equipment for waste paper processing pulping systems with a daily processing capacity of 250 tons or more are not yet complete. Supply, need to cooperate with foreign manufacturers. Bleaching system ClO2 preparation equipment and equipment suitable for medium and high concentration H2O2 bleaching are still not perfect; for chemical recycling of pulping waste liquor treatment, the weeding pulp alkali recovery equipment has its own characteristics and is relatively mature and needs further improvement. Although the alkaline recovery equipment of the slurry system can be supplied as a complete set, it has yet to be further developed for the newly developed black liquor heat treatment, super-concentration, and new-type high-efficiency energy-saving lime kiln. In terms of papermaking, the paper machine can only provide products with a width of 5 meters or less, a speed of 800 meters/minute, a coating machine of 4 meters or less, and a speed of 500 meters/minute or less. Papermaking equipment, high speed rewinders, calenders, paper cutters, etc. are all at low levels, performance is not stable, and production requirements are not met. Papermaking and coating systems have generally adopted controllable medium-high rollers, soft calendering, etc., which are generally not mature products. If it is developed with new technologies in the world and has been applied in the market, such as diluted headboxes, various vertical or horizontal screen forming, shoe presses, high-speed size presses, soft calendering, and effective Compared with more than 10 new technology equipments such as tension and tightness control rewinding machines, our gap is even greater.
2 Development trend of the paper industry and its requirements for equipment In terms of total volume development, it is estimated that the output of paper and paperboard will reach 38 million to 40 million tons by 2005, and is expected to reach 51 million tons in 2010, and is expected to reach 60 million in 2015. 65 million tons, that is, more than 10 years of production doubled from 2000. In spite of this, the relationship between supply and demand still cannot meet the market demand, and a considerable amount of paper and board must be imported. To achieve this goal, it is forecasted that an annual increase of nearly 3 million tons of production capacity will be required and more than 30 billion yuan will be invested.
The plan proposes to adjust and optimize the structure of the paper industry in the future, focusing on structural adjustments in six aspects, including raw materials, products, enterprises, technology, regions, and investment. Here are several aspects of structural adjustment that are closely related to the development of localized papermaking equipment:
â— Raw material structure: Gradually realize the use of wood fibers, expand the recycling of waste paper and scientifically and rationally use non-wood fiber diversified raw material structure.
â— Enterprise structure: The realization of large-scale enterprise grouping, the specialization of small and medium-sized enterprises, and the requirements for the minimum limit of the enterprise's scale.
Enterprise minimum limit:
Pulp and paper mills: 100,000 tons/year or more pulp and paper mills: 34,000 to 50,000 tons/year of specialty paper and board: 0.5 to 10,000 tons/year of chemical pulp: new and expanded pulp production scale 300,000 tons/year non-wood pulp: chemical pulp for raw materials such as reeds, bagasse, bamboo, etc., newly-built and expanded straw pulp production line with a scale of 50,000 tons/year or more: new-built and expanded pulp production line with a scale of 34,000 tons/year or more .
â— Technical structure: Accelerate technological progress 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 raw materials, new pulp types, various chemical additives, coatings, waste paper processing, fiber recycling, pollution prevention, and environmental protection.
â— Product structure: Diversification, increasing effective market supply, and adapting to the needs of diversified consumer structures (paper and paperboard products are becoming thinner, higher quality, more variety, etc.), and mid-to-high-end products will be from the year 2000 50% increase to 90%.
The above-mentioned adjustments and requirements for optimizing the structure have already clearly set goals for papermaking equipment manufacturing companies. It is the main basis for formulating localized equipment development plans in the future. 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. For example, most of the waste paper processing equipment used in this batch of projects has a processing capacity of 350-400 tons per day; the majority of paper machines have a width of 4500-6000 mm and speeds of 1,000-1600 meters per minute. Many companies require dilution Headbox, shoe press, soft calendering. The rewinder requires a speed of 2500 m/min, a coater width of 4600 mm, and a speed of 1400 m/min. The reason why these companies have spent huge sums of money to introduce foreign advanced equipment is mainly to hope that they can operate with the lowest consumption and high efficiency and produce products with the best quality to compete in the international market. However, at the same time, we should also note that on the one hand, it takes a large amount of national foreign exchange. On the other hand, due to the high price of imported equipment, it also increases the construction investment, and at the same time it also increases the production cost of the company, which is not conducive to further improving economic efficiency. Therefore, the modernization of China's paper industry is also eagerly looking forward to China's papermaking equipment manufacturing industry can provide high-quality, high-level advanced equipment as soon as possible.
Accelerating the modernization of papermaking equipment in China is the responsibility of equipment manufacturing companies, and it is also an excellent opportunity for equipment manufacturing companies to develop. We must grasp this opportunity, review the situation, act as quickly as possible, formulate practical development plans, and develop and strengthen ourselves while meeting the development needs of the paper industry.
The state attaches great importance to improving the level of China's papermaking equipment and increasing the localization rate. The leaders of the State Economic and Trade Commission personally presided over this work and held several seminars. It is required to combine the key papermaking projects supported by this national debt bond, introduce foreign equipment, and introduce 12 keys including hydraulic headboxes for high-speed paper machines, waste paper processing lines with large production capacity, controllable medium and high rollers, and soft calenders. Technical equipment design technology and manufacturing technology. And at the same time as the introduction of manufacturing companies to provide a certain amount of financial support, combined with localized equipment targeted to carry out technological transformation, so that it has the conditions for the manufacture of these advanced equipment. This work is currently under way, and it has also received strong support from papermaking companies that plan to introduce foreign equipment, and the introduction of equipment will be synchronized with the introduction of technology.
3 The focus of the current localization equipment development Due to the constraints of China's papermaking raw material structure and funds, the paper industry will continue to be large and medium-sized in the coming period, with a medium-sized structure. To this end, papermaking equipment manufacturing industry should take effective measures to accelerate the development of large-scale modern products while striving to improve and improve the level of medium-sized papermaking machinery products and form a complete series. The development of current products must be based on a practical and realistic approach, fully taking into account the achievability and closely integrated with advanced process technologies, manufacturing technologies, and control technologies, toward large-scale, high-efficiency, high-quality, low-consumption, optical-mechanical-electrical integration and Eco-friendly development.
The main products proposed to focus on development:
Pulping:
â— To adapt to the diversified characteristics of papermaking raw materials, we will focus on the development of 100,000 to 300,000 tons of wood chemical pulping production line equipment with an annual output of 50,000 to 100,000 tons, mainly consisting of continuous cooking and energy-saving batch cooking. The fiber is a horizontal pulp-type continuous chemical cooking equipment.
â— It is equipped with chemical thermo-mechanical pulp production line equipment with an annual output of 34,000 to 50,000 tons, such as poplar, birch, eucalyptus, etc.
â— It is suitable for the processing of waste cardboard and waste newsprint and magazine paper with an annual output of 70,000 to 150,000 tons, and deinking production line equipment.
â— Adapt to ClO2 preparation equipment in large pulp mills.
â— Medium and high concentration H2O2 bleaching device.
â— The chemical recovery equipment for pulping waste liquid should focus on improving the alkali recovery rate and reducing energy consumption, focusing on the development of a combined extraction equipment for enhancing the black liquor extraction rate of blackwood pulp, black liquor heat treatment, black liquor removal of silicon, and new Energy efficient lime kiln and other equipment.
Papermaking, coating and finishing equipment:
â— Focus on the development of offset newsprint, low-quantity newsprint, offset book, kraft paperboard, and high-grade copperplate
1. Brief review of production status of papermaking equipment 1.1 Basic situation According to incomplete statistics, the total output of pulp and paper machinery in the country is about 120,000 tons (including spare parts production). Every year, the paper industry can provide complete sets of equipment that can produce 1 million to 1.2 million tons of production capacity. The country is engaged in the production of papermaking equipment, scientific research, development, design, and colleges and universities (including professional production plants) nearly 500, distributed in 25 provinces and cities across the country. Among them, Shanghai, Shandong, Jiangsu, Liaoning, Hubei, Hunan, Henan, Fujian, Shaanxi, Sichuan and other provinces and cities are the main production areas, and their total production accounts for about 90% of the total output.
1.2 The main product status currently available â— The full set of chemical pulping equipment with an annual output of 70,000 tons or less includes a full set of non-wood fiber horizontal pipe continuous cooking equipment with a daily production capacity of 50 to 150 tons.
â— Waste paper processing pulp production line OCC single line production capacity of 150 tons / day following equipment;
ONP/OMG single line production capacity 100 tons/day following equipment.
â— The annual output of 35,000-100,000 tons of wood chemical pulp mills and the annual output of 25,000-5 million tons of non-wood fiber chemical pulping plants, a full set of alkali recovery equipment â— Annual output of 80,000 tons of papermaking equipment below the width of 5000 mm , Multi-cylinder multi-cylinder paper machines with various widths and speeds within 700 m/min;
Width less than 5000 mm width, speed 400 ~ 800 meters / minute long board board machine;
Width 3520 mm width, speed 250 ~ 450 m / min light coating machine;
Width less than 2700 mm, speed <1200 m/min tissue paper machine;
Width less than 4,200 mm, white board coater, coated paper coater.
1.3 Product Level and Gap For a long time, China's paper industry is basically medium and small paper mills. China's pulp and paper machinery manufacturing industry also basically determines the production plan of these small and medium-sized paper mills and technological transformation needs. With the in-depth development of reform and opening up, the readjustment of the scale structure of the paper industry, in order to meet the needs of the development of the new situation, during the "6th Five-Year Plan" and "Seventh Five-Year Plan" period, a group of more advanced products that meet China's national conditions have been developed. There are mainly the following aspects.
â— Suitable for non-wood fiber horizontal tube continuous cooking equipment (including wet preparation)
â— New type of internal and external flow pressure screen (including corrugated plate structure)
â— New type drum vacuum washer (including corrugated board structure)
â—Full-plate and plate-and-tube combined evaporator system equipment â—Large alkali recovery jet furnace (including single boiler odorless furnace)
â— Pre-mounted white mud filter â— Adopts various new headboxes, stacking nets, fully closed draws, various combinations of composite presses, large rolls, wide nip, bag ventilation, all-digital high-precision electronic control system Culture Paper Machines and Board Machines â—Using bar coaters, air knife coaters, blade coaters and various combination coating heads, coaters with high-strength hot air drying technology, and high-speed light applicators â— Suitable for OCC, ONP/OMG waste Paper processing pulping line full set of 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-80s levels, with small product specifications, low speed, poor automation, and poor adaptability to process performance, especially the lack of adaptation to wood-based products. Large-scale, high-efficiency, high-quality, high-level automation products are needed for large-scale pulp and paper mills and high-grade paper production. In terms of pulping, the vertical continuous cooking equipment suitable for wood pulping has not yet become a climate. The high-level large-capacity production system for chemical mechanical pulping equipment and the equipment for waste paper processing pulping systems with a daily processing capacity of 250 tons or more are not yet complete. Supply, need to cooperate with foreign manufacturers. Bleaching system ClO2 preparation equipment and equipment suitable for medium and high concentration H2O2 bleaching are still not perfect; for chemical recycling of pulping waste liquor treatment, the weeding pulp alkali recovery equipment has its own characteristics and is relatively mature and needs further improvement. Although the alkaline recovery equipment of the slurry system can be supplied as a complete set, it has yet to be further developed for the newly developed black liquor heat treatment, super-concentration, and new-type high-efficiency energy-saving lime kiln. In terms of papermaking, the paper machine can only provide products with a width of 5 meters or less, a speed of 800 meters/minute, a coating machine of 4 meters or less, and a speed of 500 meters/minute or less. Papermaking equipment, high speed rewinders, calenders, paper cutters, etc. are all at low levels, performance is not stable, and production requirements are not met. Papermaking and coating systems have generally adopted controllable medium-high rollers, soft calendering, etc., which are generally not mature products. If it is developed with new technologies in the world and has been applied in the market, such as diluted headboxes, various vertical or horizontal screen forming, shoe presses, high-speed size presses, soft calendering, and effective Compared with more than 10 new technology equipments such as tension and tightness control rewinding machines, our gap is even greater.
2 Development trend of the paper industry and its requirements for equipment In terms of total volume development, it is estimated that the output of paper and paperboard will reach 38 million to 40 million tons by 2005, and is expected to reach 51 million tons in 2010, and is expected to reach 60 million in 2015. 65 million tons, that is, more than 10 years of production doubled from 2000. In spite of this, the relationship between supply and demand still cannot meet the market demand, and a considerable amount of paper and board must be imported. To achieve this goal, it is forecasted that an annual increase of nearly 3 million tons of production capacity will be required and more than 30 billion yuan will be invested.
The plan proposes to adjust and optimize the structure of the paper industry in the future, focusing on structural adjustments in six aspects, including raw materials, products, enterprises, technology, regions, and investment. Here are several aspects of structural adjustment that are closely related to the development of localized papermaking equipment:
â— Raw material structure: Gradually realize the use of wood fibers, expand the recycling of waste paper and scientifically and rationally use non-wood fiber diversified raw material structure.
â— Enterprise structure: The realization of large-scale enterprise grouping, the specialization of small and medium-sized enterprises, and the requirements for the minimum limit of the enterprise's scale.
Enterprise minimum limit:
Pulp and paper mills: 100,000 tons/year or more pulp and paper mills: 34,000 to 50,000 tons/year of specialty paper and board: 0.5 to 10,000 tons/year of chemical pulp: new and expanded pulp production scale 300,000 tons/year non-wood pulp: chemical pulp for raw materials such as reeds, bagasse, bamboo, etc., newly-built and expanded straw pulp production line with a scale of 50,000 tons/year or more: new-built and expanded pulp production line with a scale of 34,000 tons/year or more .
â— Technical structure: Accelerate technological progress 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 raw materials, new pulp types, various chemical additives, coatings, waste paper processing, fiber recycling, pollution prevention, and environmental protection.
â— Product structure: Diversification, increasing effective market supply, and adapting to the needs of diversified consumer structures (paper and paperboard products are becoming thinner, higher quality, more variety, etc.), and mid-to-high-end products will be from the year 2000 50% increase to 90%.
The above-mentioned adjustments and requirements for optimizing the structure have already clearly set goals for papermaking equipment manufacturing companies. It is the main basis for formulating localized equipment development plans in the future. 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. For example, most of the waste paper processing equipment used in this batch of projects has a processing capacity of 350-400 tons per day; the majority of paper machines have a width of 4500-6000 mm and speeds of 1,000-1600 meters per minute. Many companies require dilution Headbox, shoe press, soft calendering. The rewinder requires a speed of 2500 m/min, a coater width of 4600 mm, and a speed of 1400 m/min. The reason why these companies have spent huge sums of money to introduce foreign advanced equipment is mainly to hope that they can operate with the lowest consumption and high efficiency and produce products with the best quality to compete in the international market. However, at the same time, we should also note that on the one hand, it takes a large amount of national foreign exchange. On the other hand, due to the high price of imported equipment, it also increases the construction investment, and at the same time it also increases the production cost of the company, which is not conducive to further improving economic efficiency. Therefore, the modernization of China's paper industry is also eagerly looking forward to China's papermaking equipment manufacturing industry can provide high-quality, high-level advanced equipment as soon as possible.
Accelerating the modernization of papermaking equipment in China is the responsibility of equipment manufacturing companies, and it is also an excellent opportunity for equipment manufacturing companies to develop. We must grasp this opportunity, review the situation, act as quickly as possible, formulate practical development plans, and develop and strengthen ourselves while meeting the development needs of the paper industry.
The state attaches great importance to improving the level of China's papermaking equipment and increasing the localization rate. The leaders of the State Economic and Trade Commission personally presided over this work and held several seminars. It is required to combine the key papermaking projects supported by this national debt bond, introduce foreign equipment, and introduce 12 keys including hydraulic headboxes for high-speed paper machines, waste paper processing lines with large production capacity, controllable medium and high rollers, and soft calenders. Technical equipment design technology and manufacturing technology. And at the same time as the introduction of manufacturing companies to provide a certain amount of financial support, combined with localized equipment targeted to carry out technological transformation, so that it has the conditions for the manufacture of these advanced equipment. This work is currently under way, and it has also received strong support from papermaking companies that plan to introduce foreign equipment, and the introduction of equipment will be synchronized with the introduction of technology.
3 The focus of the current localization equipment development Due to the constraints of China's papermaking raw material structure and funds, the paper industry will continue to be large and medium-sized in the coming period, with a medium-sized structure. To this end, papermaking equipment manufacturing industry should take effective measures to accelerate the development of large-scale modern products while striving to improve and improve the level of medium-sized papermaking machinery products and form a complete series. The development of current products must be based on a practical and realistic approach, fully taking into account the achievability and closely integrated with advanced process technologies, manufacturing technologies, and control technologies, toward large-scale, high-efficiency, high-quality, low-consumption, optical-mechanical-electrical integration and Eco-friendly development.
The main products proposed to focus on development:
Pulping:
â— To adapt to the diversified characteristics of papermaking raw materials, we will focus on the development of 100,000 to 300,000 tons of wood chemical pulping production line equipment with an annual output of 50,000 to 100,000 tons, mainly consisting of continuous cooking and energy-saving batch cooking. The fiber is a horizontal pulp-type continuous chemical cooking equipment.
â— It is equipped with chemical thermo-mechanical pulp production line equipment with an annual output of 34,000 to 50,000 tons, such as poplar, birch, eucalyptus, etc.
â— It is suitable for the processing of waste cardboard and waste newsprint and magazine paper with an annual output of 70,000 to 150,000 tons, and deinking production line equipment.
â— Adapt to ClO2 preparation equipment in large pulp mills.
â— Medium and high concentration H2O2 bleaching device.
â— The chemical recovery equipment for pulping waste liquid should focus on improving the alkali recovery rate and reducing energy consumption, focusing on the development of a combined extraction equipment for enhancing the black liquor extraction rate of blackwood pulp, black liquor heat treatment, black liquor removal of silicon, and new Energy efficient lime kiln and other equipment.
Papermaking, coating and finishing equipment:
â— Focus on the development of offset newsprint, low-quantity newsprint, offset book, kraft paperboard, and high-grade copperplate
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