The huge amount of fly ash is hidden behind the hidden worry China is a big coal producing country, using coal as its main source of electricity. In recent years, China's energy industry has developed steadily, with an annual growth rate of 7.3%. The rapid development of the power industry has brought about a sharp increase in the amount of fly ash. The total amount of fly ash discharged annually by coal-fired thermal power plants is increasing year by year. The increase will be about 150 million tons in 2000 and 300 million tons in 2010, which will put tremendous pressure on China's national economic construction and ecological environment. On the other hand, China is also a country with limited resources per capita. The comprehensive utilization of fly ash, turning waste into treasure and turning harm into profit has become an important technical and economic policy in China's economic construction. An important means of contradiction between power production environment pollution and lack of resources is also one of the tasks that power production is facing. At present, fly ash is mainly used to produce fly ash cement, fly ash brick, fly ash silicate block, fly ash aerated concrete and other building materials; it can also be used as agricultural fertilizer and soil improver; Recycling industrial raw materials and environmental materials; fly ash ceramsite, fly ash as the main raw material, a small amount of binder and solid fuel, mixed, pelletized, high-temperature burning to make an artificial lightweight bone Expected. As a major coal consumer, China's fly ash emissions have increased rapidly. Only simple treatment of fly ash as building materials such as cement and fly ash bricks, or agricultural fertilizers, can not only completely absorb and absorb the growing powder. The amount of coal ash did not achieve the purpose of increasing the added value. The comprehensive utilization of fly ash should be “fast whip†With the increasing environmental problems, improving the environment and accelerating the recycling of resources is an urgent task for the development and utilization of resources. However, the comprehensive utilization of coal ash is not to repeat the old process of construction, but should use advanced technology, reasonable technology, and reliable equipment to reduce production costs, ensure product quality, and comply with the corresponding national standards. Fly ash also contains useful components such as carbon, iron , aluminum and hollow microspheres. It first recovers and extracts useful components, and then produces building materials with high dosage. It is to eliminate the hazard of fly ash and make it resourceful. The beneficial route. The fly ash project itself is a waste utilization project and a good project to control the environment. Therefore, secondary pollution should not occur during and after the project is completed. In order to adapt to the growing situation of China's fly ash emissions, the comprehensive use of scientific research results should be transformed into productivity as soon as possible. Technological innovation + equipment to force: key development direction of comprehensive utilization of fly ash With the improvement of the level of science and technology, technological innovation has been successfully applied in the field of comprehensive utilization of fly ash, comprehensive utilization of the other components contained in fly ash, for example, in the case of high alumina fly ash, "high aluminum powder The birth technology of coal ash extraction alumina multi-production is precisely for the purpose of harmless disposal of large quantities of high-aluminum fly ash and full utilization of renewable resources. The equipment is used for the development of special equipment for the utilization of fly ash. On the basis of the existing pulverizers and crushers , special equipments with high degree of automation are developed to improve the level of technical equipment for the utilization of fly ash. Research and development and promotion of a large number of ash projects. This can quickly and effectively solve the environmental problems caused by fly ash, and is the most effective way to reduce the pollution of fly ash and occupy a large area. It is necessary to further expand the utilization of fly ash in highway construction, and continue to improve the distribution ratio and production process of fly ash building materials such as burn-free bricks. The application of fly ash in plastics, rubber, etc. Fly ash is mainly used as an additive here, and can continuously expand the field of high value utilization of fly ash. Application of fly ash in wastewater treatment. The use of fly ash with large specific surface area, many pores and good adsorption performance can handle various industrial pollutions. The research shows that the treatment of papermaking wastewater by fly ash adsorption method can effectively reduce the chemical oxygen demand content of wastewater, and the elimination rate of volatile phenol is 99.5%, which basically meets the national emission standard. In addition, fly ash has also achieved good results in the treatment of printing and dyeing wastewater, coke specific wastewater and electroplating wastewater. The resource comprehensive utilization industry adopts advanced technology of high efficiency and environmental protection, comprehensive utilization of main materials, auxiliary materials and associated materials in resource exploitation and production process, and comprehensive utilization of renewable resources can alleviate the shortage of resources and shortages, and solve environmental pollution problems. . As an important carrier and effective support for the development of circular economy, the development of comprehensive utilization of resources is the fundamental way to solve the two core problems of rational use of resources and pollution prevention in China's sustainable development. It can be seen that improving the comprehensive utilization of fly ash has a great impetus to China's resource utilization and pollution prevention. With the development of technology and the continuous expansion of applications, the comprehensive utilization of fly ash will be greatly improved. Cnc Machine Processing,Cnc Cutting Machine,Cnc Plasma Cutting Machine,Cnc Glass Cutting Machine shegnzhuan , https://www.shengzuanmachinery.com
Improve the comprehensive utilization of fly ash and adhere to the road of sustainable development
Powder coal ash from coal combustion flue gas be collected down fine ash, fly ash is the major solid waste from coal-fired power plants. The main oxide composition of fly ash in thermal power plants in China is: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2 and so on. Fly ash is one of the industrial wastes with large displacement in China. With the development of the power industry, the amount of fly ash discharged from coal-fired power plants has increased year by year. If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; if it is discharged into the water system, it will cause siltation of the river, and the toxic chemicals in it will cause harm to human body and organisms.