The high alkali coal in Jundong has high total moisture content

medium calorific value

low ash content

extremely low to low harmful element content(low phosphorus

extremely low chlorine

extremely low fluorine

low arsenic content)

and is easy to grind and very easy to ignite.It is extremely flammable and has good combustion performance.However

due to the high content of alkali metals

especially Na_2O

in the high alkali coal ash in Jundong

it has a tendency of serious slagging and contamination.By taking the 600 MW unit as an example

the operation performance of the unit co-firing Zhundong high alkali coal was analyzed.Moreover

according to the operation status of in service 350 MW unit boiler firing 100% Zhundong coal

the key parameters and system arrangement of the furnace chamber

heating surface

burner

pulverizing system and ash blowing system for 660 MW unit boiler firing 100% Zhundong high-alkali coal are put forward

by combining theoretical calculation with practical experience data.The research can be used as a reference for the design of 600 MW unit boiler firing 100% Zhundong high alkali coal.