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Wave of low-carbon development in China under a blueprint for the printing indu
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The implementation of low power consumption, low pollution, low-emission low-carbon economy based on green economic development model has become one hot topic, which is both the only way to achieve sustainable economic development, but also the transformation of economic development Ways to promote industrial energy efficiency, emission reduction, saving a major issue that must be addressed. Then, the boom in low-carbon development, the printing industry about the current status of carbon emissions, for energy saving, printing companies from which they can ring Day started, we will discuss in this article. Analysis of the printing industry's carbon emissions Printing process is divided into pre-press, printing, finishing processes, different process stages of carbon emissions are not the same. 1. Prepress Process Original and pre-press process including typesetting, printing plates, printing materials, ink, printing machinery and other preparatory work, most notably carbon emissions are generated in the plate-making process wastewater that ps / ctp version of development , Fixing and other waste generated in the process developer, fixer, fountain solution, wash version of water, the waste contains large amounts of organic matter and heavy metal ions, on the very serious environmental pollution. According to statistics, in the course of each plate so that ps 2m2ps version with 1 liter of waste will produce developer, fixer and 1 liter of water, while the ctp version by eliminating the need for developing the fixing process, greatly reducing waste emissions generated per 10m2ctp version only 1 liter of waste fluid. According to official statistics Dollars, in 2009 the total national production of offset printing plates is 2.99 million square meters, of which version of ps output of 218 million square meters, is expected this process will reach the total wastewater generated is about 250 million liters. In addition, the plastic used in China each year The total quantity of 050 million square meters chip to 1 million square meters, in the plate-making process, each film will be using 5m2 ~ 6m2 1 liter of waste generated, it will produce 10 million liters per year to 2,000 million liters of wastewater. 2. Printing Technology Carbon emissions generated by the printing process was mainly due to the printing ink drying process generated voc (volatile organic compounds) emission pollution, printing equipment, energy consumption, waste paper, rubber stick, ink wash cloth, waste ink Containers, wash presses, rubber rollers, etc. of large quantities of organic solvent waste, and noise pollution. Two previous example. ① voc air pollution: At present, most of the printing ink used in industry contain solvents, which generally use the gravure and flexo inks containing volatile solvents, the organic solvent content of up to 40% to 60% , Dry produce more likely to be volatile voc, not only causing serious air pollution, but also on the human nervous system and cause serious harm to hematopoiesis. According to official statistics, in 2009 the total production of about 470,000 tons ink , In which solvent-based inks Jinsi Cheng, alone will be nearly 80,000 tons per year of organic solvents into voc emission to the atmosphere. ② energy consumption of printing equipment: printing packaging printing industry is energy-hungry industries. According to conservative statistics, the use of complex equipment in the printing and coating of about 1 million, according to energy consumption of each device 200kw / h meter, Annual energy consumption (in energy terms) = 200kw / (h • Taiwan) × 4800h / a (boot time) × 1 million = 9.6 billion kwh; by each device exhaust emission of thermal waste 10800m3 / h meter, heat exhaust emissions = 10800m3 / h × 4800h / a (boot Between) × 1 million = 518 400 000 000 m3, and, so far, the hot exhaust of the potential energy has not been effectively used, resulting in a huge waste of energy. 3. India Technology India's carbon emissions after the process mainly from India after the film, coating, die cutting, stamping, binding, gluing, etc. produced during the organic solvent evaporation, power consumption, heat emission, solid waste, a small amount of liquid waste, etc. and production Students of the noise pollution. At present, India's film plastic film used in many areas is the solvent, the production process will generate a large number of voc emissions, according to statistics, currently there are 1.6 million to 2 million units (sets) of solvent-based laminating machine, Each dry solvent recovery unit emissions of 15 tons to 30 tons / year, the country is expected that 24 million tons to 60 tons of organic solvent emissions to the atmosphere. In addition, part of India after the use of dry film laminating machine energy consumption is very large, each Total energy consumption amounting to approximately 2.2 billion kwh ~ 40 亿 kwh Footnote: Each dry compound machine drying solvent consumption of 14 billion kWh to 20 billion kWh / Taiwan • year is 1.6 million to 2 million pieces (sets) calculation〕. In addition, both the pre-press, printing, various parts of the operation, or printed later stage, will have a lot of blankets, ink wash cloth, waste ink containers, waste materials and other solid waste, cleaning printing presses, rubber rollers, etc. Also produce large amounts of organic solvent waste, cleaning and processing costs are high. Printing analysis of related industries in addition to carbon emissions generated in the process of printing production of carbon emissions, some printing-related industries has become the focus of carbon emissions and focus, such as ps / ctp plate production process Waste acid, waste water and waste, ink used in the manufacture of various organic solvents, resins, paper industry wastewater discharges, cod, etc., blankets, cots, a variety of containers and other solid waste, printing equipment over Process energy consumption and so on. 1.ps/ctp version of the production of waste generated in the process pH, wastewater and waste gas ps / ctp version of the production need to go through Caustic degreasing, hydrochloric acid electrolysis, sulfuric acid oxidation, coating and drying process, and each process section also need to use Copious amounts of water to remove the aluminum surface of the surface of aluminum residue, therefore, in the ps / ctp version of the production process will generate a lot of waste acid, waste alkali and wastewater. According to statistics, every production of 1,000 million square meters of ps / ctp version , Will generate waste sulfuric acid 2000m3 ~ 2500m3, waste hydrochloric acid 7000m3 ~ 10000m3, spent caustic 4000m3 ~ 4500m3, washed version of wastewater m3 ~ 35 万 30 million m3. According to official statistics, in 2009 the total output of offset printing plates 299 million square meters, so the total waste generated by all are: waste sulfuric acid solution over 60 thousand m3, waste hydrochloric acid more than 20 million m3, spent caustic than 12m3, nearly 10 million waste water washing Edition m3. Furthermore ps / ctp version of the production process Sensitive adhesive coating containing more than 80% organic solvents, these organic solvents in the dry basic volatile emissions into the atmosphere, an annual increase of nearly tons of voc emissions. 2. Ink used in the manufacture of various organic solvents and resins in the ink manufacturing process, the need to use a variety of organic solvents, resins and other organic matter, which makes the ink into the printing voc organic pollutants, waste ink Containers to one of the major solid waste. Currently, China has over 300 professional manufacturers ink, 2009 ink output reached 470 thousand tons, the annual consumption dozens ton organic solvents and resins, etc., also generate large The amount of waste ink container and other solid waste. 3. Paper industry waste water, cod and other paper industry has always been China's industrial waste water and emissions of large cod, but also pollution control emissions of key industries. In 2008, for example, the paper industry wastewater emissions and cod Emissions were 40.8 million tons and 1.289 million tons, ranking first in the industry for three consecutive years the two statistical indicators of the first. In addition, the recovery rate of waste of resources is relatively low, less than 40%, the recovery rate of 70% in developed countries are far apart. It is calculated that recycling 1 ton of office type paper, can produce 0.8 tons of recycled paper, if the world today Half of the paper used in office to be recycled, will be able to meet the demand of 75%, equivalent to eight million hectares of forest from deforestation. Therefore, the scientists and the source of recycled paper - waste paper called the "fourth forest." 4. Blankets, cots, a variety of containers and other solid waste Extensive use of the printing process of printing blankets and rubber roller, the printing of an important source of solid waste. According to official statistics, in 2009 the total output of 1.47 million printing blankets square meters, an increase of 4%; printing rollers output of 1.7 billion cubic centimeter, an increase of 14%. Analysis of the printing industry in energy saving Printing industry to achieve energy conservation, should focus on two aspects of work to do: First, promote the use of R & D green printed materials and low-carbon printing process, from the existence of fundamental solution to the current energy consumption of the printing industry, Emissions and other issues; the second is the mainstream of traditional printing processes and technology industry, upgrading of the printing industry, most of the material to achieve the recycling and comprehensive treatment and utilization, energy saving so as to achieve the purpose of printing industry . 1. Green, environmentally friendly selection of printed materials research and development and promote the use of green, environmentally friendly printing industry printing materials to achieve the fundamental guarantee of energy saving, green is the ultimate realization of the security printing, available to The following aspects to resolve. To develop environment-friendly ink. Currently, the common environment-friendly inks are water-based ink, alcohol inks, soy ink, uv ink, ink and eb. These inks are the ink components from the start of environmental protection material on Material to replace the traditional solvent-based inks in organic solvents, which can effectively solve the problem of pollution ink. Actively promote environmentally friendly substrate material. On the one hand, printing enterprises should comply with international environmental requirements of the procurement of paper, which controlled the paper should come from plantations and sustainable development, such as fsc paper, pefc paper, dechlorination Delignification deacidification and paper, etc.; the other hand, vigorously promote the use of new printing substrates, such as in this year's debut of two sessions of paper used and the stone to replace the traditional paper. According to reports, an annual output of 36 million tons of the "stone Paper "project, 8,640,000 cubic meters per year instead of wood pulp making. Moreover, actively promoting the use of recycled paper to increase their usage. Development of biodegradable polymer materials. pvc (polyvinyl chloride primary substrate, due to be phased out with chloride and chloride-free security, the light degradation of polymer-based materials, polyolefin materials is the best alternative to pvc. Development of new environmentally friendly plates and printing supplies, such as the free version of reason ctp, such plates do not require any chemical solution can be directly discharged. In addition, a need to develop voc Brush cleaning agents, water-based varnish, water-based coating such as plastic. 2. Choose a low-carbon printing process Promote-to-plate (ctp) technology. ct reduced the plate in the film output, flushing fixing and significantly reduces waste, waste emissions. Currently, the country of production and material technologies have been more mature ctp addition, Edition inkjet ctp ctp technology and other new research and development. Actively promote digital printing technology. Because many of the digital printing system printing intermediate steps to achieve the energy saving operating environment, efficient use of paper, recycling of resources, the intellectual side Energy, which also make it more green features. ipex show, the number and variety of digital printing parameters of the traditional printing equipment. In the long run, digital printing direction of a brush, will become the focus of the next printing technology. 3. To actively promote the development of solvent-free composite technology The technology used in solvent-free adhesive, the entire process of production and use of pollution-free, into the material to completely eliminate) the advantages of solvent residues. In addition, dry as a dry compound of 1 / 25 ~ 1 / 15, and the production of large velocity Big reduce energy consumption, is recognized as one of the future direction of composite. Solvent-free in foreign countries, the development of composite technology has been actively promoting the use of recycled paper to increase their usage. In addition, the strong development of biodegradable polymer materials. pvc (polyvinyl chloride) is the main substrate packaging and printing, Chloride due to be phased out with the development of new environmentally friendly chlorine-free light degradable type of polymer materials is urgent, in which polyolefin is the best alternative to pvc material. Development of new environmentally friendly plates and printing supplies, such as rinse-free version, free ctp version of such treatment, such plates do not require any chemical solution, the resulting liquid waste can be discharged directly. In addition, a low level of need to develop voc Printing press cleaning agents, water-based varnish, water-based coating such as plastic. 4. For printing, India actively promote the combination of print Printing technology is the combination of a variety of printing technology on the same production line as a multi-printing method (such as flexo, screen printing or digital printing) and finishing process film, die cutting, creasing, stamping, etc.) in one various water Printing and finishing the advantages of combining the above methods, new equipment in such devices as high as 80% to 90%. In China, the relatively slow development of the technology, according to incomplete statistics, the end of 2009 internally solvent recovery Together about 50 devices, most of them imported equipment, and production scale is small, the total combined production capacity of less than 5%. If the ratio of solvent-free composite of 30% to 50%, the annual reduction of organic Solvent emissions from 7.2 million tons to 18 tons, nearly 500 million energy saving kwh. In addition to the above 4 points, the need to vigorously develop the environmental flexo, printing, water-based coating technology and other new technologies. The increase of new materials, new process development technologies used at the same time, co-current of the actual situation in the printing industry to speed up the traditional Stream part of the printing process or technology upgrading. 1.ps/ctp version of the production process, recycling of liquid or According to the survey, many enterprises and the extensive use of acid in the management of waste acid, waste alkali and water, not only Waste a lot of acidic water and other resources, but also produce a lot of waste, companies also need the high cost of such sewage, more importantly, on the surrounding environment pollution. To solve this problem, China Academy of Printing Technology Of research, has developed a "waste acid recycling operation line" and "wash version of the new technology of wastewater reuse", has been used p version of the production enterprises. According to enterprises (annual 800 million m2 plate) to reflect the new acid recycling online Technology "for the enterprise to save tons per year of concentrated sulfuric acid (98%) and 350 tons of liquid caustic soda (45%), offset printing plate production process each year generated about 250 million liters of total water; each will have with the film plate 10,000 l ~ 2000 Million liters of water; annual emissions from printing and complex equipment reached a total of 518.4 billion cubic meters; film work produced by each of voc emissions by 24 million tons to 60 tons. Short, one can get the best printing results, on the other hand significantly Shorten the production cycle, energy efficient. For example, energy-saving double-sided eight-color printing press, one to go to complete the double-sided paper, eight-color printing, saving 17 million per year per device level. 1.ps/ctp version of the production process, recycling of liquid or reuse According to the survey, many enterprises and the extensive use of acid-base approach in the treatment of waste acid, waste alkali and water, not only wasting a lot of acid and alkali water And other resources, but also produce large amounts of waste, companies also need to do to pay the high cost of such sewage, more importantly, the surrounding environment causing serious pollution. To solve this problem, China Academy of Printing Technology launched Research studies, has developed a "waste acid recycling of new online technology" and "wash the new version of wastewater reuse technology", has been used ps / ctp version of the production enterprises. According to enterprises (annual 800 million m2 plate) reflect, "Waste Acid recycling technology online "Every year more than 200 tons can be saved for the enterprise concentrated sulfuric acid (98%) and 350 tons of liquid caustic soda (45%), only these two to the value of nearly 80 million, but also can reduce more than 300 tons of waste production; "Washing version of wastewater reuse in the new technology" companies to save water each year nearly 15 million m3, about 60 million. 2. Recovery of packaging and printing voc emissions generated in the process of organic solvents and potential energy Currently abroad in voc recycling of organic solvents is relatively mature, while the domestic but also in its infancy, they use a catalytic combustion method with direct emissions of combustion exhaust voc. As for the potential energy of the back Income, has been supporting the introduction of heat recovery equipment such as MAN Roland's dual-dryrto (regenerative thermal oxidation) dryer, selectdryer preferred drying system, selectcombicenter preferred temperature is mature, the proportion of in Europe 70% to 90%. The design, to 2009 on the value of nearly 80 million, but also can reduce the amount of 300 tons; "version of wastewater reuse wash new technology," nearly 15 million per year for the enterprise m3, about 60 million.
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