With the acceleration of China's industrialization process, the number of thermal power plants is also constantly increasing, but the accompanying problems cannot be ignored. Thermal power plant slag is a common solid waste that, if not properly treated, will cause great harm to the environment. However, if these slag can be properly utilized, it can not only reduce the environmental burden but also create more economic value. This article will introduce the utilization methods and advantages of slag in thermal power plants.
1、 Types of slag in thermal power plants
Thermal power plant slag refers to a type of solid waste generated during the combustion of fuels such as coal and gas. According to its source and nature, the slag of thermal power plants can be divided into the following types:
1. Coal ash: When coal is burned, the partially burned part will form coal ash. Coal ash is usually divided into two types: fly ash and ash slag. Fly ash refers to coal ash with a particle size less than 0.1mm, while ash slag refers to coal ash with a particle size greater than 0.1mm.
2. Slag: Slag refers to the non combustible substances generated during the combustion process, generally including slag balls, slag, slag sand, etc.
3. Flue gas desulfurization gypsum: The gypsum produced in the flue gas desulfurization process is a common type of slag in thermal power plants.
2、 The utilization method of slag in thermal power plants
1. Utilization of coal ash
(1) Cement manufacturing: coal ash contains a large amount of silicic acid, aluminic acid, ferric oxide and other substances, which can be used for cement production.
(2) Building materials manufacturing: Coal ash can be used as a raw material for building materials, such as coal ash bricks, coal ash concrete, etc.
(3) Landfill: Coal ash can be used as a covering layer for landfills, effectively reducing the land area of landfills.
2. Utilization of slag
(1) Cement manufacturing: slag contains a large amount of silicic acid, aluminic acid, ferric oxide and other substances, which can be used for cement production.
(2) Road construction: Slag can be used as a basic material in road construction, such as roadbed, pavement, etc.
(3) Landfill: Slag can be used as a covering layer for landfills, effectively reducing the land area of landfills.
3. Utilization of flue gas desulfurization gypsum
(1) Cement manufacturing: Flue gas desulfurization gypsum contains a large amount of calcium sulfate, which can be used for cement production.
(2) Building material manufacturing: Flue gas desulfurization gypsum can be used as a raw material for building materials, such as gypsum boards, gypsum lines, etc.
(3) Agricultural use: Flue gas desulfurization gypsum can be used for soil improvement, improving soil fertility and water retention capacity.
3、 Advantages of slag utilization in thermal power plants
1. Reduce environmental pollution: Proper utilization of thermal power plant slag can reduce its pollution to the environment and reduce environmental risks.
2. Resource conservation: The slag of thermal power plants contains a large amount of useful substances. If used correctly, it can save resources and reduce waste.
3. Creating Economic Value: The correct utilization of slag in thermal power plants can create more economic value and improve the efficiency of resource utilization.
In short, the correct utilization of slag in thermal power plants is of great significance for environmental protection and resource utilization. We should actively explore the utilization methods of slag in thermal power plants and contribute to sustainable development.
