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Liaocheng Tralin group: focus on technological innovation achievements of green development

Number of visits: Date:2013-07-30
2013-07-26 09:38:35 source: Liaocheng News Network
Needham into high quality organic fertilizer pulping, papermaking wastewater can goldfish, middle water reuse saves a large amount of clean water, in a Shandong Tralin group, on the "clean pulping" and "sewage treatment" technology application and results show, refresh the pulp and paper enterprises in the network into a high-quality organic black liquor fertilizer, paper drainage can goldfish, middle water reuse saves a large amount of clean water, in a Shandong Tralin group, on the "clean pulping" and "sewage treatment" technology application and results show, refresh the pulp and paper enterprises in the people's heart image. Through intensive scientific and technological innovation and investment in construction projects, solve universal problem in papermaking industry, to enable enterprises to get rid of "pollution hat", step into the ranks of enterprises to achieve green development, rapid upgrade.
Innovative three leading international technology, the source of pollution control. Cooperation with Chinese Tralin group pulp and paper research institute, Nanjing Forestry University and other research institutions, after ten years of technical research, successfully developed the clean pulping process, the core contains fine preparation, cooking, oxygen delignification of three independent innovation technology. The application of the three technologies, to maximize the removal of the effective composition of the slurry, reducing the pollution load into the environmental treatment system. In the fine preparation section, the company invented hammer mill \ \ cylinder cyclone separator and other equipment, to achieve the separation of straw silk and impurities, miscellaneous cells and dust removal rate increased from 50% to 90% in the traditional process, the invalid components significantly reduced in pulping process; displacement cooking links using displacement cooking process through the hot pot, black liquid, cold black liquid replacement, recycling black liquor in the cooking process to reduce the viscosity of black liquor, the extraction rate increased from traditional 80-85% to more than 92%, reduce the pollution load into the wastewater; oxygen delignification process, enterprises for the first time application of oxygen delignification in non wood fiber pulping, and achieved good results after the bleaching process can effectively remove the residual lignin in pulp. At the same time, cancel the bleaching process, the fiber loss is reduced by 8% (equivalent to a ton of pulp wastewater treatment load decreased 80Kg), pulp yield increased from 40% to 50%, the washing water to reduce 40-50 m3. In particular, the pulping process cancel the bleaching process, but also fundamentally avoid producing chlorine bleaching process of adsorbable organic halides AOX.
Through the application of unbleached pulp Tralin group straw product technology R & D, bleaching and whitening is not natural culture paper, color paper and color of life food and medical packaging boxes and other products, to ensure the health and safety of the use of paper. After testing, the application of 100% color paper unbleached straw pulp production does not contain dioxins, add the total natural culture paper imported dioxin content bleached pulp is 0.221pg/g, only the equivalent of the paper category AOX standard limit of 40 pg/g 0.55%, the equivalent of the food AOX standard limit of 12 pg/g 1.84%. Generous investment in pollution control projects, wastewater treatment "make classification". For the three kinds of wastewater from pulping and papermaking process, the company Tralin classification processing: black liquor all used to produce organic fertilizer, paper machine white water recycling, middle water into the sewage treatment system for processing. The company invested 500 million yuan to build "physicochemical + composite aeration + Anaerobic + aerobic + advanced oxidation treatment" middle water treatment project, the waste water produced in the process of straw pulping pulping process for back, to achieve 20 thousand tons per day water reuse, water consumption, unbleached straw pulp drop to 23m3/ tons of pulp, the indicators are leading the domestic drainage standard. With the recent covers an area of 1566 acres of Tralin artificial wetland built using drainage group Tralin added a "filter" Tralin discharged from the sewage treatment plant water, through the closed pipeline into the Tralin wetland, through absorption and purification of wetland reed, reed, cattail and other dozens of plants and microorganisms, water quality further optimization. At present, emission index of Tralin group has stabilized at COD40 below mg/L, the ammonia nitrogen stable below 2mg/L, and the complete eradication of the harm of AOX to water. (Liu Jie, Guo Xiyan)
News links: Liaocheng Tralin group: focus on technological innovation achievements of green development (Liaocheng News Network)

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