Treatment and utilization of fly ash and desulfurization gypsum in thermal power plants.
I. Introduction. With the continuous growth of energy demand, thermal power plants have received widespread attention around the world as an important power source***. However, thermal power plants produce a large amount of solid wastes such as fly ash and desulfurization gypsum during operation, and the treatment and utilization of these wastes have always been the focus of attention in the field of environmental protection and energy. This paper will carry out an in-depth treatment and utilization of fly ash and desulfurization gypsum in thermal power plants, in order to maximize the utilization of resources and protect the environment.
2. Overview of fly ash and desulfurization gypsum in thermal power plants.
Fly ash: It is a fine particle produced after coal combustion in a boiler, mainly composed of oxides such as silicon, aluminum, iron, etc. Fly ash has a certain activity and can be used as a building material or soil amendment.
Desulfurization gypsum: It is an industrial by-product produced in the process of flue gas desulfurization, and the main component is calcium sulfate. Desulfurization gypsum has a certain hydraulicness and can be used as a building material. At the same time, it can also be used in fields such as soil improvement and wastewater treatment.
3. Treatment of fly ash and desulfurization gypsum of thermal power plants.
Fly ash treatment: The treatment of fly ash mainly includes collection, storage and transportation. Thermal power plants should adopt advanced collection systems to ensure effective collection of fly ash and reduce environmental impact. Attention should be paid to waterproof, moisture-proof and weatherproof measures in the storage process to ensure the quality of fly ash. Dust-proof measures should be taken during transportation to avoid pollution to the environment.
Treatment of desulfurization gypsum: The treatment of desulfurization gypsum mainly includes dehydration, drying and storage. Dehydration is a critical step in the treatment of desulfurized gypsum and can be carried out by mechanical dewatering or natural dehydration. The drying process can be dried and dried to reduce the moisture content of desulfurization gypsum and improve its utilization value. When storing, attention should be paid to waterproof, moisture-proof and anti-caking measures.
4. Utilization of fly ash and desulfurization gypsum in thermal power plants.
Building materials: Both fly ash and desulfurization gypsum can be used as raw materials for building materials to produce bricks, blocks, cement and other products. These products have good mechanical properties, durability and environmental protection properties, and can be widely used in the construction field.
Soil amendment: fly ash and desulfurization gypsum are rich in silicon, aluminum, calcium and other elements, which can improve the physical and chemical properties of the soil, improve the fertility and water retention capacity of the soil. Therefore, they can be used as soil amendments to promote the sustainable development of agricultural production.
Wastewater treatment: The calcium sulfate in desulfurization gypsum has a certain adsorption capacity and can be used to treat pollutants such as heavy metal ions and organic matter in industrial wastewater and domestic sewage. Through adsorption, the concentration of pollutants in wastewater can be reduced to meet the discharge standard.
Other application areas: In addition to the above-mentioned fields, fly ash and desulfurization gypsum can also be used in subgrade engineering, landfill covering materials, etc. These applications maximize the use of resources while reducing the impact on the environment.
V. Conclusions and prospects.
In this paper, through an in-depth study on the treatment and utilization of fly ash and desulfurization gypsum in thermal power plants, it is found that these wastes have a wide range of application prospects. Through scientific and reasonable treatment and utilization, we can not only maximize the utilization of resources, but also reduce the impact on the environment, and promote the sustainable development of environmental protection and energy. In the future, with the continuous progress and innovation of science and technology, it is believed that the treatment and utilization technology of fly ash and desulfurization gypsum in thermal power plants will continue to improve and develop, and make greater contributions to the construction of a resource-saving and environment-friendly society. At the same time, enterprises should strengthen the supervision and support of waste treatment and utilization, promote the healthy development of related industries, and achieve a win-win situation of economic and environmental benefits.