Removal of PCDDs/Fs from a solid waste incinerator using a Dual Bag Filter system with recycled activated carbon

摘要

A Dual Bag Filter (DBF) system was developed for the removal of dioxins (PCDDs/Fs) emitted from a municipal solid waste incinerator (MSWI). A 2,000 Nm~3/h capacity DBF pilot plant was designed, manufactured, and operated with actual MSWI flue gases. The result showed that pressure drop of the filter bag is the most important variable in PCDDs/Fs removal by the DBF system. Removal efficiency of PCDDs/Fs decreased as pressure drop increased in the 1st bag filter of the DBF system. On the other hand, removal efficiency of PCDDs/Fs increased as the pressure drop of the 2nd bag filter increased. Pressure drop ranges for the most effective operation in the filter bag were 150～200 mmH_2O and 170～200 mm H_2O for 1st and 2nd bag filter respectively. The emission of PCDDs/Fs after removal by the DBF system was below 0.05 ng-TEQ/ Nm~3, when pressure drop of the 2nd bag filter was operated about 200 mmH_2O.