The papermaking technology, which is regarded as one of the four major inventions in ancient China, has now made a major breakthrough. A new technology called “ultra-short-cycle woody non-contaminating papermaking†has entered a practical stage. The application of poplar raw materials from 1 to 2 years can produce high-quality newsprint, offset printing paper, and copperplate paper, etc. Medium and high-grade cultural paper, and no pollution. The world's papermaking wastewater pollution problem that has been plaguing humanity for many years is expected to be solved.
Modern papermaking usually adopts chemical pulping and high-yield pulping, which causes serious pollution and high energy consumption. The ultra-short-cycle woody thermal jet mill wood pulp papermaking technology invented by the former dean of the Xinjiang Academy of Forestry Prof. Chen Juheng is a new type of technology independent of chemical pulping and high-yield pulping. The pollution-making pulping method is compatible with domestically-manufactured equipment and has become a mature technology. The inspection data provided by the authoritative department showed that the use of this method papermaking, the amount of alkali compounds is only 3%, less than 2% soluble in water; the process of hydrogen peroxide is chlorine-free bleaching, the discharge of papermaking wastewater PH value of 6 to 7 .9, which is neutral and can be used for land irrigation. After anaerobic and aerobic treatment, it can be directly discharged into rivers; the use of this technology requires only 30 cubic meters of water per ton of paper, which is 1/10 of the national standard; This technology, whether it is a new paper mill or an old paper mill, does not require alkaline recovery equipment. With only this option, a paper mill with an annual output of 50,000 tons of paper can save 40 million yuan to 70 million yuan. Compared with foreign countries, according to renminbi calculations, foreign companies generally need to invest 70 million yuan per metric ton of finished paper, and the use of this technology requires only 0.24 billion yuan. After testing, with this method of papermaking, the whiteness and physical properties of the paper have reached international standards.
In order to solve the wood resources of papermaking, Prof. Chen Juheng also invented the method of “ultra-short-cycle papermaking raw material forest cultivation methodâ€: Spring will insert poplar bark into the ground. In the fall of the second year, it can grow to 78 meters in height, with a breast diameter of about 3 to 7 cm. After the harvest, no new plants are needed. The following spring will naturally sprout forests. This method shortens the cycle time for artificially planting poplars from about 7 years to 1 to 2 years; the annual output of about 1 cubic meter per acre increases to 4.7 to 6.3 cubic meters, creating a world production area of ​​artificial forests. The highest record of material volume not only provides a reliable raw material guarantee for the paper industry, but also opens an important path for the rapid realization of the self-sufficiency of wood raw materials in China's forest industry. Moreover, it is of great significance for windbreaks and sand fixation in afforestation and the protection of the ecological environment. Using this technology, non-polluting wood-based panels, cutlery and woody feed can also be produced.
It is understood that the majority of paper mills in China currently rely mainly on straw pulping and papermaking. The paper products produced are of low grade, high cost and low benefit. A small number of large paper mills use wood pulp for papermaking. The main raw materials are imported, which has high cost and poor efficiency. It is the industry that bears the brunt of China’s accession to the WTO.
In the past few years, there were more than 9,000 paper mills in China, most of which were straw pulp and paper, and were heavily polluted. As a result, more than 3,000 were shut down. Most of the medium and large-sized paper mills that have been retained use chemical pulping and high-yield pulping. Although large amounts of investment have been made to carry out the alkali recovery project, there are still 8% to 17% of residual alkalis polluting the environment. In recent years, two measures have been adopted for the development of pulp and papermaking countries. One is to use high-yield forests to produce raw materials, but the output is low. To produce 1 ton of wood pulp, 25 acres of poplar and high-yield forests must be created to ensure the normal production of paper mills. Due to insufficient land resources in China, it is not advisable to use wood pulp for this purpose. The second is to rely on imported wood to achieve wood pulp and papermaking. The use of Professor Chen's new technology, in a short period of time to change the straw pulp paper to wood pulp papermaking, less investment, quick, can quickly restore a large number of closed small and medium-sized paper mills, so that a large number of laid-off workers can be re-employed, but also Improve the efficiency of China's wood pulp production capacity.
It is understood that the transformation of small straw pulp paper mills is mainly to change the straw steam ball system to a thermal spray system, adding small-diameter material stripping machines, chippers, washing machines, pretreatment cooking tubes and other equipment. Renovation of 20,000 tons of straw pulp paper mills, including sewage treatment, reconstruction costs of 18.65 million yuan; transformation of 50,000 tons of straw pulp paper mills, including sewage treatment, reconstruction costs of 32.829 million yuan.
The ultra-short cycle poplar uses a single cutting to form a forest, which can be used continuously for 6 to 8 years. The average annual cost per mu is 500 yuan, and the profit is 500 to 800 yuan. Its economic efficiency is higher than that of agriculture, which is a highly effective adjustment of the structure of food crops. industry.
Professor Chen Juheng’s two series of inventions have obtained six national patents. The relevant experts spoke highly of his invention. The famous scientist Qian Xuesen sent a letter to Chen Juheng, saying that his invention was "pleasant and congratulatory," and "significant."
Modern papermaking usually adopts chemical pulping and high-yield pulping, which causes serious pollution and high energy consumption. The ultra-short-cycle woody thermal jet mill wood pulp papermaking technology invented by the former dean of the Xinjiang Academy of Forestry Prof. Chen Juheng is a new type of technology independent of chemical pulping and high-yield pulping. The pollution-making pulping method is compatible with domestically-manufactured equipment and has become a mature technology. The inspection data provided by the authoritative department showed that the use of this method papermaking, the amount of alkali compounds is only 3%, less than 2% soluble in water; the process of hydrogen peroxide is chlorine-free bleaching, the discharge of papermaking wastewater PH value of 6 to 7 .9, which is neutral and can be used for land irrigation. After anaerobic and aerobic treatment, it can be directly discharged into rivers; the use of this technology requires only 30 cubic meters of water per ton of paper, which is 1/10 of the national standard; This technology, whether it is a new paper mill or an old paper mill, does not require alkaline recovery equipment. With only this option, a paper mill with an annual output of 50,000 tons of paper can save 40 million yuan to 70 million yuan. Compared with foreign countries, according to renminbi calculations, foreign companies generally need to invest 70 million yuan per metric ton of finished paper, and the use of this technology requires only 0.24 billion yuan. After testing, with this method of papermaking, the whiteness and physical properties of the paper have reached international standards.
In order to solve the wood resources of papermaking, Prof. Chen Juheng also invented the method of “ultra-short-cycle papermaking raw material forest cultivation methodâ€: Spring will insert poplar bark into the ground. In the fall of the second year, it can grow to 78 meters in height, with a breast diameter of about 3 to 7 cm. After the harvest, no new plants are needed. The following spring will naturally sprout forests. This method shortens the cycle time for artificially planting poplars from about 7 years to 1 to 2 years; the annual output of about 1 cubic meter per acre increases to 4.7 to 6.3 cubic meters, creating a world production area of ​​artificial forests. The highest record of material volume not only provides a reliable raw material guarantee for the paper industry, but also opens an important path for the rapid realization of the self-sufficiency of wood raw materials in China's forest industry. Moreover, it is of great significance for windbreaks and sand fixation in afforestation and the protection of the ecological environment. Using this technology, non-polluting wood-based panels, cutlery and woody feed can also be produced.
It is understood that the majority of paper mills in China currently rely mainly on straw pulping and papermaking. The paper products produced are of low grade, high cost and low benefit. A small number of large paper mills use wood pulp for papermaking. The main raw materials are imported, which has high cost and poor efficiency. It is the industry that bears the brunt of China’s accession to the WTO.
In the past few years, there were more than 9,000 paper mills in China, most of which were straw pulp and paper, and were heavily polluted. As a result, more than 3,000 were shut down. Most of the medium and large-sized paper mills that have been retained use chemical pulping and high-yield pulping. Although large amounts of investment have been made to carry out the alkali recovery project, there are still 8% to 17% of residual alkalis polluting the environment. In recent years, two measures have been adopted for the development of pulp and papermaking countries. One is to use high-yield forests to produce raw materials, but the output is low. To produce 1 ton of wood pulp, 25 acres of poplar and high-yield forests must be created to ensure the normal production of paper mills. Due to insufficient land resources in China, it is not advisable to use wood pulp for this purpose. The second is to rely on imported wood to achieve wood pulp and papermaking. The use of Professor Chen's new technology, in a short period of time to change the straw pulp paper to wood pulp papermaking, less investment, quick, can quickly restore a large number of closed small and medium-sized paper mills, so that a large number of laid-off workers can be re-employed, but also Improve the efficiency of China's wood pulp production capacity.
It is understood that the transformation of small straw pulp paper mills is mainly to change the straw steam ball system to a thermal spray system, adding small-diameter material stripping machines, chippers, washing machines, pretreatment cooking tubes and other equipment. Renovation of 20,000 tons of straw pulp paper mills, including sewage treatment, reconstruction costs of 18.65 million yuan; transformation of 50,000 tons of straw pulp paper mills, including sewage treatment, reconstruction costs of 32.829 million yuan.
The ultra-short cycle poplar uses a single cutting to form a forest, which can be used continuously for 6 to 8 years. The average annual cost per mu is 500 yuan, and the profit is 500 to 800 yuan. Its economic efficiency is higher than that of agriculture, which is a highly effective adjustment of the structure of food crops. industry.
Professor Chen Juheng’s two series of inventions have obtained six national patents. The relevant experts spoke highly of his invention. The famous scientist Qian Xuesen sent a letter to Chen Juheng, saying that his invention was "pleasant and congratulatory," and "significant."
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