Comprehensive utilization of slag in thermal power plants

Comprehensive utilization of slag in thermal power plants

With the acceleration of industrialization, the number of thermal power plants is constantly increasing, and the amount of slag generated by thermal power plants is also constantly increasing. The treatment of slag has always been a challenge. The traditional method of treatment is to directly stack it on the site, which not only occupies a large amount of land resources, but also causes pollution to the environment. Therefore, the comprehensive utilization of slag in thermal power plants has become a hot topic.

1、 Types of slag in thermal power plants

The slag of thermal power plants is mainly divided into three types: coal ash, limestone flue gas desulfurization gypsum, and denitrification wastewater membrane sludge. Among them, coal ash is the most important slag, accounting for more than 90% of the total slag. Coal ash is mainly divided into two types: fly ash and bottom ash. Fly ash refers to the ash carried away in the flue during the combustion process, while bottom ash refers to the substance that cannot be burned out during the combustion process.

2、 Comprehensive utilization of slag in thermal power plants

There are many methods for the comprehensive utilization of slag in thermal power plants, including cement manufacturing, concrete manufacturing, road construction, landfill cover layer, brick and tile manufacturing, glass manufacturing, ceramic manufacturing, etc. Below, we will focus on introducing several common comprehensive utilization methods.

1. Cement manufacturing

Cement manufacturing is one of the important ways to comprehensively utilize slag in thermal power plants. Coal ash can replace some cement raw materials, limestone flue gas desulfurization gypsum can replace some limestone, and denitrification wastewater membrane sludge can replace some clinker. This can not only reduce energy consumption and carbon dioxide emissions in the cement production process, but also effectively utilize slag resources.

2. Concrete manufacturing

Concrete manufacturing is another common method of comprehensive utilization of slag in thermal power plants. Coal ash can replace some cement in concrete, while limestone flue gas desulfurization gypsum can replace some limestone in concrete. This can not only reduce energy consumption and carbon dioxide emissions during the concrete production process, but also effectively utilize slag resources.

3. Road construction

Road construction is another important way of comprehensive utilization of slag in thermal power plants. Coal ash can replace some roadbed materials, while limestone flue gas desulfurization gypsum can replace some pavement materials. This can not only reduce energy consumption and carbon dioxide emissions during road construction, but also effectively utilize slag resources.

3、 Advantages of comprehensive utilization of slag in thermal power plants

There are many advantages in the comprehensive utilization of slag in thermal power plants, including:

1. Save resources

The comprehensive utilization of slag in thermal power plants can effectively utilize slag resources, reduce the demand for raw materials, and save resources.

2. Reduce pollution

The comprehensive utilization of slag in thermal power plants can reduce the occupation of land and water resources, and reduce environmental pollution.

3. Reduce costs

The comprehensive utilization of slag in thermal power plants can reduce the cost of waste treatment and lower the cost of enterprises.

4、 The Challenge of Comprehensive Utilization of Slag in Thermal Power Plants

The comprehensive utilization of slag in thermal power plants also faces some challenges, including:

1. High technical difficulty

The comprehensive utilization of slag in thermal power plants requires technology from multiple industries, which is highly challenging.

2. Incomplete laws and regulations

At present, China's laws and regulations on the comprehensive utilization of slag in thermal power plants are not yet perfect, and there is a lack of clear policy support.

3. Insufficient market demand

The market demand for comprehensive utilization of slag in thermal power plants is not strong enough, and further promotion and promotion are needed.

5、 Conclusion

The comprehensive utilization of slag in thermal power plants is an important environmental protection project, which can effectively utilize slag resources, reduce environmental pollution, and reduce enterprise costs. Although facing some challenges, we believe that with the joint efforts of the government and enterprises, the comprehensive utilization of slag in thermal power plants will definitely achieve better development.

Comprehensive utilization of slag in thermal power plants