Slag Treatment in Garbage Thermal Power Plants

Slag Treatment in Garbage Thermal Power Plants

With the process of urbanization, the amount of urban waste is also constantly increasing. In order to solve the problem of garbage disposal, garbage thermal power plants have emerged. The construction of garbage thermal power plants can not only solve the problem of urban garbage treatment, but also convert garbage into energy. However, the operation of garbage thermal power plants also generates a large amount of slag, and how to treat these slag has become an urgent problem to be solved.

1、 Slag treatment methods for waste thermal power plants

There are two main methods for treating slag in garbage thermal power plants, one is landfill, and the other is resource utilization.

Landfill is the process of burying slag directly underground, which has a lower cost but can cause environmental pollution. And resource utilization refers to the classification, cleaning, crushing, and other processing of slag before reuse. This method of treating slag has a higher cost, but it can fully utilize the resource value of slag and reduce environmental pollution.

2、 Classification of slag from waste thermal power plants

There are two main types of slag generated by garbage thermal power plants, one is bottom slag and the other is fly ash.

Bottom slag refers to the slag generated at the bottom of the furnace during the combustion process, which is mainly composed of minerals and inorganic substances. The treatment method of bottom slag is generally through mechanical equipment for separation, crushing, screening, and other treatments, followed by landfill or resource utilization.

fly ash refers to the particulate matter suspended in the flue gas during the combustion process, mainly composed of minerals, inorganic substances, and organic substances. Fly ash is generally treated by Electrostatic precipitator and other equipment for separation, collection, classification, crushing, screening and other treatment before landfill or resource utilization.

3、 Resource utilization of slag from garbage thermal power plants

The resource utilization of waste thermal power plant slag mainly includes the following methods:

1. Cement products

After mixing slag with materials such as cement and lime, cement products are made through processes such as adding water, stirring, and pressing. Cement products have good mechanical properties, durability, and corrosion resistance, and can be used in fields such as buildings, roads, bridges, etc.

2. Bricks

After mixing slag with materials such as sand and lime, bricks are made through processes such as adding water, stirring, and pressing. Slag bricks have good strength and durability, and can be used in fields such as architecture, roads, and gardens.

3. Iron ore

After crushing and screening the slag, the iron ore can be extracted from it. Iron ore can be used for smelting metal materials such as iron and steel.

4. Glass products

After mixing slag with materials such as quartz sand and sodium carbonate, glass products are made by heating, melting, forming, and other processes. Slag glass products have excellent physical properties and chemical stability, and can be used in fields such as architecture, home furnishings, and decoration.

4、 Conclusion

The slag treatment of a garbage thermal power plant is a complex process that requires multiple stages such as classification, cleaning, crushing, and screening. Resource utilization is a sustainable treatment method that can fully utilize the resource value of slag and reduce environmental pollution. In future development, we need to further improve the level of slag resource utilization and make greater contributions to building a beautiful China.

Slag Treatment in Garbage Thermal Power Plants