How to deal with slag from garbage power plants

With the acceleration of urbanization, the issue of garbage is receiving increasing attention from people. Garbage power plants, as an effective waste treatment method, have received widespread attention and promotion. However, garbage power plants generate a large amount of slag during the process of disposing of garbage, and if not properly treated, it will cause serious pollution to the environment. This article will introduce the treatment methods of waste power plant slag, in order to contribute to environmental protection and sustainable development.

1、 Types of slag

The slag generated by garbage power plants is mainly divided into two types: bottom slag and fly ash. Bottom slag is formed at the bottom of the furnace, mainly composed of slag, ash, coal slag, etc; Fly ash is generated during the combustion process and is mainly composed of harmful substances such as heavy metals, chlorides, and sulfates. These slag not only contain a large amount of harmful substances, but also cause serious pollution to the environment. Therefore, garbage power plants must take effective treatment measures.

2、 Treatment method of slag

1. Treatment of bottom slag

Bottom slag is the main slag generated by garbage power plants, and there are several methods for treating bottom slag:

(1) Landfill method

The landfill method is a traditional treatment method that buries the bottom slag underground to isolate it from the soil and prevent the infiltration of harmful substances. However, the landfill method consumes a large amount of land resources and can also cause pollution to groundwater and soil, making it not a sustainable treatment method.

(2) Recycling

The bottom slag contains a large amount of minerals, which can be recycled to reduce environmental pollution. Bottom slag can be used to make road materials, cement, bricks and other building materials, as well as to fill earthwork, cushion and other engineering projects.

(3) Chemical curing

Chemical solidification is a method of using chemical reactions to solidify harmful substances in the bottom slag. This method can effectively reduce the release of harmful substances and reduce environmental pollution.

2. Treatment of fly ash

Fly ash is another type of slag generated by garbage power plants, and the main methods for treating fly ash are as follows:

(1) Wet treatment

wet treatment is the process of mixing fly ash with water to form a slurry, and removing harmful substances through sedimentation, filtration, and other methods. This method can effectively reduce the pollution of fly ash to the environment, but the treatment process requires a large amount of water resources, and the treated sludge needs further treatment.

(2) Heat treatment

Heat treatment is the pyrolysis of fly ash at high temperatures to decompose and volatilize harmful substances, thereby reducing environmental pollution. This method can reduce the harmful substances in fly ash to a very low level, but the treatment process will generate a large amount of carbon dioxide and other harmful gases, which will also have a certain impact on the environment.

III. Conclusion

Garbage power plants are an effective way of garbage disposal, but during the process of garbage disposal, a large amount of slag will be generated. If not properly treated, it will cause serious pollution to the environment. Therefore, garbage power plants must take effective treatment measures, classify the bottom slag and fly ash, and adopt methods such as landfill, recycling, chemical solidification, wet treatment, and heat treatment to minimize harmful substances, in order to protect the environment and promote sustainable development.