Under the background of carbon peak and carbon neutralization

the importance of thermal power generation in northwest China has been further increased. Due to the high proportion of high alkali coal in this area

serious slagging and contamination come out easily in the process of burning high alkali coal in boiler. It's of vital importance to solve the problem of safe burning of high alkali coal ensuring the safety of electric power in China.The present situation of high-alkali coal combustion technology at home and abroad is introduced in this paper.With more than ten years' research

the high-alkali coal combustion technology in China has been improved remarkably

and the related achievements have been popularized and applied in the electric power industry. The blending ratio of high alkali coal in boiler has been increased from less than 60% to more than 90%

though the full burning of high alkali coal has not been realized yet. This paper introduces different technical routes to realize full burning of high alkali coal and analyzes the equipment parameters and operation of typical boilers burning high alkali coal. Generally speaking

pulverized coal boiler

fluidized bed boiler and liquid slag boiler have their own advantages and disadvantages in the adaptability to high alkali coal

with technical bottlenecks to be further studied and broken through. In order to ultimately solve the high alkali coal combustion problem

more new technologies need to be introduced.