A 465 t/h CFB boiler with compact separator

which was manufactured from Foster Whiler Corporation

has been used in Guangzhou petro-chemical company to burn high-sulfer petroleum coke

adopting fully new two-stage elesulphurization and two-stage dust removal system

i.e.CFB+ESP+CFB semi-dry FGD+bag filter.Results of practical application show that the CFB boiler has very strong ability of desulphurization and denitrification in the furnace

for petroleum coke with sulfer content about 7.0%

the desulphurization efficiency can reach 96% and more;after putting the two-stage system into operation

the desulphurization efficiency 96.8%

the highest efficiency can reach 99.4%

the average concentration of SO2 emission is less than 200 mg/m3(the lowest 100 mg/m3);the concentration of dust emission 50mg/m3

various indices in operation are better than the requirements in design.