Experimental study on the separation of acetylene carbon black water with flocculants

In orderto solvethe problem oftoxic and harmful gas and carbon black dust escaping duringthe separation of carbon black water in the production of acetylene from natural gas, two flocculants, polyacrylamide (PAM) and basic aluminum chloride (BAC), were used to flocculate carbon black water. The results show that the combination of PAM and BAC can reduce the separation time of carbon black water. Under 84℃, when the dosage of PAMis 0.02g/g carbon black, the dosage of BAC is 0.1g/g carbon black, carbon black water with the solid content of 0.17 wt% can be separated in 20s, the solid content of water phase is 0.067 wt%, and the viscosity (22℃) of water phaseis1.05 mPa· s. The effects of PAM dosage on the recycling of carbon black water are investigated and the technological process of closed separation of carbon black water with flocculants is put forward.