This paper introduces the composition of CDQ bleeding gas,analyses the pollutants containing in the gas,and puts forward two solutions for the bleeding gas treatment,i.e.Pre-desulphurization process before dedusting and post-desulphurization process after the dedusting.It also compares the two processes in terms of applicable range,investment,operatability,and influencing factors,etc..

CDQ, Bleeding gas, Desulphurization, Environment protection