The papermaking technology, which is regarded as one of the four major inventions in ancient China, has now undergone a major breakthrough. A new technology called “ultra-short-cycle woody paper-free pulp†has entered the practical stage, applying 1 to 2 The annual poplar raw materials can produce high-quality newsprint paper, offset printing paper, copperplate base paper and Other medium-to-high-grade cultural paper; and it is pollution-free. The world's paper pulping wastewater pollution problem that has plagued 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 and paper technology invented by Prof. Chen Juheng, the deputy director of the Xinjiang Academy of Forestry, is a brand new technology that is independent of chemical pulping and high-yield pulping. Contamination pulp pulp, which is compatible with the domestic equipment industry has become a complete set of mature technology.
The inspection data provided by the authoritative department indicates that the use of this method of papermaking; the amount of alkali compounds is only 3%; less than 2% of water soluble; the hydrogen peroxide in the process is chlorine-free bleaching, and the PH value of the papermaking wastewater is 6 to 7.9, which is neutral, can be used for land irrigation. After anaerobic and aerobic treatment, it can be directly discharged into rivers; using this technology requires only 30 cubic meters per ton of paper water, which is 1/10 of the national standard.
Applying this technology, no matter whether it is a new paper mill or an old one, there is no need for alkaline recovery equipment. With only one roof, the construction of a paper mill with an annual output of 50,000 tons of paper can save 40 million yuan to 7 million yuan.
Compared with foreign countries, in terms of 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, the whiteness and physical properties of the paper used in this method have reached international standards.
In order to solve the wood resources of papermaking, Prof. Chen Juheng also invented the method of “cultivation of ultra-short-cycle papermaking raw material Colinâ€: Spring will insert poplar sticks into the ground, and it can grow to seven or eight surgery heights in the fall of the second year. 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 production volume per mu increases from about 1 cubic meter to 4.7 to 6.3 cubic meters, creating the highest production volume per unit area of ​​planted forest in the world. Records; not only provides a reliable raw material guarantee for the paper industry, but also opens an important way for the rapid realization of self-sufficiency of wood raw materials in China's forest industry. In addition, it is of great significance to protect wind and sand and to protect the ecological environment. Using this technology, pollution-free wood-based panels, cutlery and woody feed can also be produced.
It is understood that most of the paper mills in China are mainly pulp and paper. The paper products produced are of low grade, high cost, and low benefit; a few large paper mills use wood pulp for papermaking; the main raw materials are imported; the cost is high and the efficiency is poor.
In the past few years, there were more than 9,000 paper mills in China, most of which were straw pulp and paper; the pollution was serious, so more than 3,000 were shut down. Retained medium and large paper mills mostly use chemical pulping and high-yield pulping. Although large amounts of investment have been made for alkali recovery projects, there are still 8% to 17% of residual alkalis polluting the environment.
In recent years, two measures have been adopted for the development of wood 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, it is necessary to create 25 mu of Yangcun High-yield forest; only in this way can the normal production of paper mills be guaranteed; Inadequate resources; It is not advisable to go this way to achieve pulp and papermaking; the second is to rely on imported wood to achieve wood pulp and papermaking, which is also not desirable due to lack of national strength.
The use of Professor Chen’s new technology will, in the short term, change pulpwood to wood pulp and papermaking, with low investment and quick results. It will 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. The Effective Way 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, and to add small diameter material stripping machines, chippers, washing machines, pretreatment cooking tubes and other equipment. The reconstruction of the 20,000-ton straw pulp paper mill, including sewage treatment, will require a reconstruction fee of 18.65 million yuan; the renovation of a 50,000-ton pulp and paper mill, including sewage treatment, will require a conversion cost of 32.829 million yuan.
The ultra-short cycle Yangcun uses a cutting and cutting forest, which can be used continuously for 6 to 8 years. The average annual cost per mu is 500 yuan; the profit is 500 to 800 yuan; its economic efficiency is higher than that of agriculture; it is a highly effective adjustment of the structure of food crops. industry.
Professor Chen Juheng’s two series of inventions have won six national patents and experts have highly praised 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 and paper technology invented by Prof. Chen Juheng, the deputy director of the Xinjiang Academy of Forestry, is a brand new technology that is independent of chemical pulping and high-yield pulping. Contamination pulp pulp, which is compatible with the domestic equipment industry has become a complete set of mature technology.
The inspection data provided by the authoritative department indicates that the use of this method of papermaking; the amount of alkali compounds is only 3%; less than 2% of water soluble; the hydrogen peroxide in the process is chlorine-free bleaching, and the PH value of the papermaking wastewater is 6 to 7.9, which is neutral, can be used for land irrigation. After anaerobic and aerobic treatment, it can be directly discharged into rivers; using this technology requires only 30 cubic meters per ton of paper water, which is 1/10 of the national standard.
Applying this technology, no matter whether it is a new paper mill or an old one, there is no need for alkaline recovery equipment. With only one roof, the construction of a paper mill with an annual output of 50,000 tons of paper can save 40 million yuan to 7 million yuan.
Compared with foreign countries, in terms of 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, the whiteness and physical properties of the paper used in this method have reached international standards.
In order to solve the wood resources of papermaking, Prof. Chen Juheng also invented the method of “cultivation of ultra-short-cycle papermaking raw material Colinâ€: Spring will insert poplar sticks into the ground, and it can grow to seven or eight surgery heights in the fall of the second year. 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 production volume per mu increases from about 1 cubic meter to 4.7 to 6.3 cubic meters, creating the highest production volume per unit area of ​​planted forest in the world. Records; not only provides a reliable raw material guarantee for the paper industry, but also opens an important way for the rapid realization of self-sufficiency of wood raw materials in China's forest industry. In addition, it is of great significance to protect wind and sand and to protect the ecological environment. Using this technology, pollution-free wood-based panels, cutlery and woody feed can also be produced.
It is understood that most of the paper mills in China are mainly pulp and paper. The paper products produced are of low grade, high cost, and low benefit; a few large paper mills use wood pulp for papermaking; the main raw materials are imported; the cost is high and the efficiency is poor.
In the past few years, there were more than 9,000 paper mills in China, most of which were straw pulp and paper; the pollution was serious, so more than 3,000 were shut down. Retained medium and large paper mills mostly use chemical pulping and high-yield pulping. Although large amounts of investment have been made for alkali recovery projects, there are still 8% to 17% of residual alkalis polluting the environment.
In recent years, two measures have been adopted for the development of wood 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, it is necessary to create 25 mu of Yangcun High-yield forest; only in this way can the normal production of paper mills be guaranteed; Inadequate resources; It is not advisable to go this way to achieve pulp and papermaking; the second is to rely on imported wood to achieve wood pulp and papermaking, which is also not desirable due to lack of national strength.
The use of Professor Chen’s new technology will, in the short term, change pulpwood to wood pulp and papermaking, with low investment and quick results. It will 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. The Effective Way 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, and to add small diameter material stripping machines, chippers, washing machines, pretreatment cooking tubes and other equipment. The reconstruction of the 20,000-ton straw pulp paper mill, including sewage treatment, will require a reconstruction fee of 18.65 million yuan; the renovation of a 50,000-ton pulp and paper mill, including sewage treatment, will require a conversion cost of 32.829 million yuan.
The ultra-short cycle Yangcun uses a cutting and cutting forest, which can be used continuously for 6 to 8 years. The average annual cost per mu is 500 yuan; the profit is 500 to 800 yuan; its economic efficiency is higher than that of agriculture; it is a highly effective adjustment of the structure of food crops. industry.
Professor Chen Juheng’s two series of inventions have won six national patents and experts have highly praised 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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