In order to reduce fuel procurement costs and ensure fuel supply

a certain power plant in Gansu burns a large proportion of Xinjiang high-alkali Guanghui coal and Xinjiang Energy coal. After burning the high-alkali coal

the boiler experiences severe high-temperature corrosion and coking on the heating surface

and the maximum load can only be carried to 85% ECR. In order to reduce high-temperature corrosion

research has been conducted on coal quality characteristics

combustion optimization adjustment

and equipment improvement technology for boilers. The research results show that

the boiler still experiences severe high-temperature corrosion even when burning low sulfur coal

which is mainly related to the high content of alkali metals such as sodium and calcium

as well as chlorine in Xinjiang coal. By increasing oxygen content

reducing primary air volume

weakening the swirling strength of outer secondary air of the burner

and increasing wall-attached air

operation adjustment measures can improve the high-temperature corrosion characteristics of the water wall to some extent. But to completely solve this problem

it is necessary to start with the use of additives

high-temperature corrosion prevention spraying

adding soot blowers

improving wall-attached air and burner design

and other corresponding technologies. The results of this study can provide useful reference and guidance for power plants that encounter similar problems during the process of high-alkali coal burning.