Application of High Temperature Resistant Materials in CoalFired Power Plants and Research Progress of Aluminizing Coating Preparation Technology(PDF)
MATERIALS CHINA[ISSN:1674-3962/CN:61-1473/TG]
Issue:
2020年第06期
Page:
487-495
Research Field:
Publishing date:
Info
Title:
Application of High Temperature Resistant Materials in CoalFired Power Plants and Research Progress of Aluminizing Coating Preparation Technology
Coal-fired thermal power generation technology is the most important power generation technology at present. It will play a dominant role in the next 50 years. Coal and other fossil fuel resources are still the main source of electricity and will not be substituted for the short term. Compared with other power generation technologies, the total installed capacity of thermal power accounts for about 60%, which has absolute advantages. The key to thermal power generation is energy utilization and environmental protection. With the development of technological innovation, the new type of ultra-supercritical unit possess power up to 1000 MW and power generation efficiency up to 50%. It was not only economical and environmentally-friendly but also improved energy efficiency. However, under extreme temperature and pressure, the performance of materials has become one of the critical factors which restrict the efficiency of power generation. From the view of the material application for coal-fired thermal power plants, this paper introduced the use of materials such as heat-resistant steel and heat-resistant coating. Aluminizing is a traditional chemical heat treatment method, which can improve the thermal stability of materials in major parts of the power plant. In this paper, the preparation methods and new technologies of aluminized coatings were reviewed. Also, hydrogen generation by coal supercritical water gasification has broad prospects. The application of this technology and coating in new power plants has been prospected.