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Organic pigments are an industry that adds beauty and brilliance to the world. In 2006, the output of organic pigments in China was approximately 182,600 tons, which was minimal compared with other bulk chemical products, but its role was very important. Many organic pigments, complete chromatograms, good brightness and color strength, and non-toxic or relatively small toxicity, overall performance is superior to inorganic pigments, widely used in inks, coatings, plastics and rubber industries, rapid development in recent years in the country .
At the same time, organic pigments will discharge organic waste water, dust, and exhaust gases during the production process. The treatment of organic waste water is a more difficult problem. In recent years, the organic pigments industry in developed countries has been shifting to developing countries. This includes the causes of production and labor costs, as well as the reasons for environmental pressures, especially pressure from organic wastewater treatment. The organic waste water produced from the production of organic pigments contains many kinds of contaminants. It is often difficult to meet the standard emission standards by using conventional biological treatment technologies. However, some new technologies such as carbon adsorption technology, extraction technology, and membrane separation technology can reduce the ammonia nitrogen content. A very low level, but its industrial application is still immature in some areas, and the high cost and short service life of key equipment do not meet the economic requirements of industrial production.
Compared with environmental protection, the energy saving pressure of the organic pigment industry is much smaller, but it does not mean there is no potential to be tapped. At present, the post-processing technology of organic pigment processing in China lags far behind that of synthesis technology. The post-processing process is also the main link that causes high energy consumption and material consumption. The post-processing of organic pigment processing includes pressure filtration, drying, and surface modification. In order to achieve the energy-saving goal of the industry, energy-saving technologies, energy-saving technologies, and energy-saving equipment must be used in every post-processing process. In terms of pressure filtration process, the filter press is the key equipment, and the filter plate is the most important component in the filter press. Therefore, the quality of the organic pigment product will be directly affected by the quality of the filter plate used in the pressure filtration process. , energy saving, environmental protection and other aspects.
For a long time, the organic pigment industry has been listed as a key pollution control target by the state. At present, the industry needs the courage and determination to “strengthen a strong warriorâ€. In order to fundamentally reverse the unfavorable situation of energy-saving and emission-reduction in the organic pigment industry, we cannot avoid the problem. We must realize that energy-saving emission reduction is not to limit the development of the industry, but to promote and promote environmentally friendly production. In addition, the severe situation in energy conservation and emission reduction also illustrates the great potential of energy-saving and emission-reduction in the industry. Through hard work, it will be able to achieve remarkable results and considerable returns. To this end, relevant experts believe that energy conservation and emission reduction can be promoted from three aspects.
The first step is to increase the investment in pollution control. This includes both the input of the enterprise and the input of the government. Especially in areas where organic pigment companies are concentrated, the government's investment becomes more important. According to Mr. Ma Renai, Chairman and General Manager of Hangzhou Honghao Pigment Chemical Co., Ltd., a number of organic pigment companies were concentrated in Xiaoshan District, Hangzhou. The Xiaoshan District Government attached great importance to this and led the company in investing billions of dollars to build 4 300,000 tons of organic pigments. The /day sewage treatment plant, together with the attention of the enterprise itself, made the local organic pigment wastewater treatment effect more satisfactory. This has provided valuable experience for organic pigment wastewater treatment in other regions and enterprises in China.
Secondly, we must speed up technological progress and develop a batch of advanced and mature organic wastewater treatment technologies. At the same time, we must optimize the production process and reduce the pollution. At present, some new technologies developed at home and abroad, such as carbon adsorption and membrane separation methods, are effective in treating high-concentration organic pigment wastewaters, and can even achieve better-than-standard emissions, but industrial applications are still not mature in some areas. Too high, companies simply cannot use it. Although the conventional biological treatment process technology has matured and the cost is in an acceptable range, it is still more difficult to meet the discharge standards when dealing with high-concentration organic wastewater. It can be said that the development of effective and low-cost technologies is a pressing issue facing the treatment of organic pigment wastewater at home and abroad.
Third, we must improve management and formulate measurable standards in industries and enterprises. It is possible to select some common organic pigment varieties with high yields, and formulate specific indicators of high or low energy consumption levels and pollutant discharge levels, and scientifically guide energy conservation, pollution reduction and pollution control in the industry.
At present, the situation of energy saving and emission reduction facing the domestic organic pigment industry is still severe. In particular, the treatment of “three wastes†is still far behind the requirements of the State Environmental Protection Administration and the international advanced level. To do a good job in energy conservation and emission reduction has become a key issue in the survival and development of the organic pigments industry. We must change the society’s impression of “high pollution†in the organic pigment industry by increasing input, technological progress, and improving management, and create an environment-friendly industry.