The high alkali coal is a kind of fine power coal which is easy to ignite and easy to burn out

while it has serious slagging and fouling characteristics. The on-service boilers are suggested only to be blended with high alkali coal in a certain proportion

so the boilers' adaptability to the high alkali coal is limit. Aiming at burning pure high alkali coal

the integrated design idea for newly built 660 MW units was proposed

and the values setting of the boiler key load parameters

the reasonable heating surface arrangement

the burner design

the selection of deslagging equipment and air pre-heater were given

to provide a reference for design of the boilers burning high alkali coal.