Discharge and Disposal of Coking Residue and Distribution Characteristics of PAHs in It

摘要

The research studied the treatment ways of discharging coking residues and the distribution characteristics of PAHs in two kinds of typical coking residues. The outputs of coal tar (100,000t/a for Plant A, 84,000t/a for Plant B) were great and it had become an important by-product. Coal tar residue, with the yields of 4,500 t/a and 6,400 t/a for Plant A and B, respectively, were always reused for coal blending. The concentration of PAHs with 5-6 aromatic rings was 1.08×10~4 mg/kg in coal tar residue, the concentration of PAHs in coke discharging smoke & dust (28.81 mg/kg) was relatively low compared with coal tar residue. The ∑BaPeq _(we)re 4.2× 10~3 mg/kg and 0.71 mg/kg for coal tar residue and coke discharging smoke & dust, respectively.