Utilization of slag from waste power generation

With the continuous acceleration of urbanization, the issue of garbage disposal is becoming increasingly prominent. Garbage power generation is currently a popular method of garbage disposal, which can convert garbage into electricity, reducing environmental pollution caused by garbage and providing clean energy for society. However, in the process of garbage power generation, a large amount of slag will be generated, and if not treated, it will cause great pollution to the environment. This article will introduce the utilization methods of slag from garbage power generation.

1、 The concept of slag

slag refers to the solid waste generated by burning garbage during the garbage power generation process. The main components of slag are inorganic substances, including oxides, silicates, chlorides, etc.

2、 Treatment method of slag

1. Landfill

Landfill is a traditional waste treatment method and a common slag treatment method. Burying slag underground can effectively reduce its impact on the environment. However, landfill will occupy a large amount of land resources and have adverse effects on groundwater, so it is not an ideal slag treatment method.

2. Recycling

Recycling is a relatively advanced method of slag treatment, which can convert slag into useful resources. At present, there are several main ways to recycle and utilize slag:

(1) Cement manufacturing

Slag can be used as one of the raw materials for cement manufacturing, replacing some of the cement raw materials and reducing production costs. Meanwhile, the application of slag in cement can improve the strength and durability of cement.

(2) Roadbed construction

Slag can be used as one of the raw materials for roadbed construction, replacing some raw materials such as limestone and sand, and reducing construction costs. At the same time, the application of slag in the roadbed can improve the bearing capacity and durability of the road surface.

(3) Building materials manufacturing

Slag can be used as one of the raw materials for building material manufacturing, and can produce high-strength and durable building material products. For example, slag can be used to manufacture building materials such as bricks, tiles, and floor tiles.

(4) Agricultural utilization

Slag can be used as one of the raw materials for agricultural fertilizers, providing the necessary nutrients for plants. At the same time, slag can adjust soil pH, improve Soil structure and improve soil fertility.

3、 Cases of utilization of slag

1. Shanghai Garbage Power Generation Slag Utilization Project

The Shanghai garbage power generation slag utilization project is mainly focused on slag recycling and utilization. This project categorizes the slag generated by the garbage power plant, recycles the recyclable slag, and landfills the non recyclable slag. Through the implementation of this project, the recovery and utilization rate of slag can be increased to over 80%.

2. Beijing slag recycling and utilization project

The Beijing slag recycling and utilization project is mainly focused on slag recycling and utilization. This project categorizes the slag generated by the garbage power plant, recycles the recyclable slag, and landfills the non recyclable slag. Through the implementation of this project, the recovery and utilization rate of slag can be increased to over 90%.

4、 Conclusion

Slag is an inevitable product in the process of garbage power generation, and if left untreated, it can cause significant environmental pollution. Through the recycling and utilization of slag, it can be converted into useful resources, reducing environmental pollution caused by garbage and providing clean energy for society. Therefore, the recycling and utilization of slag is an important part of garbage treatment and should receive increasing attention and support.