Automatic flocculant adding system for slime water sedimentation and method thereof

The invention discloses an automatic flocculant adding system for slime water sedimentation. The system comprises a thickener, and further comprises an automatic agent adding system for slime water and an agent dispersing system. The automatic agent adding system comprises a slime water feed detection unit, a monitoring operation unit and an agent adding unit which are sequentially connected. The agent dispersing system comprises a double-impeller heating efficient preparing barrel and an agent adding buffering barrel which are communicated with the agent adding unit. Two discharge ports are formed in the bottom of the agent adding buffering barrel and led to a constant-amount agent adding passageway and a variable-amount agent adding passageway respectively. Agent of the constant-amount agent adding passageway and agent of the variable-amount agent adding passageway are both converged into a slime water feed pipe. The automatic agent adding system for slime water and the agent dispersing system are both electrically connected with a control system. The invention further provides an adding method of the automatic flocculant adding system. The agent consumption is better lowered, and the slime water sedimentation effect is improved.