Zero-discharge non-pollution combined production process for ecological paper pulp

Abstract

The invention relates to a zero-release nonpollution combination production technique for ecological pulp, which uses biological decomposition as main and catalysis as complement as well as physical and mechanical break, and drafts different combination technique for variable plant material kinds and composition. This invention overcomes pollution problems in traditional technique, saves resourceand cost, and has well production quality and great social and economical benefits.

Description

technical field [0001] The invention relates to a process for making pulp, in particular to a combined production process of ecological pulp with zero discharge and no pollution. Background technique [0002] At present, the pollution of the paper industry in the world is a headache. On the one hand, the demand for paper in the international market is increasing year by year, especially the consumption in the Chinese market is increasing at an average annual rate of 12%. On the other hand, The pollution situation of the paper industry is deteriorating continuously. The main source of water pollution in major rivers and lakes in China is the paper industry. In 1989, the water quality of the Huaihe River was so polluted that it almost turned soy sauce-colored, forcing the Chinese government to order the closure of more than 2,000 small and medium-sized paper mills in the Huaihe River Basin. The color of soy sauce, the river water cannot be used for irrigation, it cannot be dr...

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Problems solved by technology

According to the "2002 Annual Report of China's Paper Industry", the discharge of wastewater from the paper industry reached 3.19 billion tons, accounting for 17.4% of the country's total industrial discharge, of which COD emissions accounted for 40.8% of the country's industrial wastewater pollutant discharge , although the national environmental protection department has continuously strengthened the control indicators and supervision for the paper industry's pollution discharge, the paper industry itself has also continuously increased the measures and investment in sewage treatment, and scientific research units are also constantly providing new pollution control technologies and methods. This has indeed improved the sewage discharge of the paper industry in China and the world year by year, but the problem is: no matter how advanced the pollution control technology and process equipment are, they cannot completely cure the sewage discharge of the paper industry to achieve zero pollution, making our lives The environment continues to be harmed by paper pollution

In view of the problem of waste liquid and sewage discharge in the above-mentioned existing pulp production process, on the basis of summarizing the research and practice of biological pulping application technology for many years, the inventor proposed an interdisciplinary and multidisciplinary composite pulping production process plan. After long-term trial and error, a very ideal zero-emission and pollution-free ecological pulp combined production process was finally developed, which completely changed the waste liquid discharge and pollution caused by the traditional chemical pulping method and other pulp production methods.

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