The flocculation module is used to flocculate and precipitate the overflow mud of the sand washer, and prepare for the next step of mud press filtration. The flocculation module at the shield sludge resource treatment site of Liuyao North Station consists of 4 sets of modular combined flocculation tanks and 1 automatic dosing machine.
The main features include.
1) Improving the slurry feeding mode at the top of the flocculation tank by adopting a spiral feeding tank to ensure that the slurry and flocculant are fully mixed, and then the slurry is fed straight into the bottom of the flocculation tank through the central feeding pipe to ensure rapid sedimentation of the slurry.
(2) The flocculation tank is reasonably designed with a diameter of 3.6 m and a height of 6 m, which is convenient for modular combination and transportation.
3) To improve the efficiency of subsequent filtering, the concentration at the bottom of the tank is controlled at about 30%.
4) Intelligent monitoring of the flocculation tank level and the depth of the flocculated and precipitated mud at the bottom of the tank.
(5) The bottom of the flocculation tank is equipped with backwashing equipment, which can be unblocked in time when 収生 blockage occurs, without manual intervention.
This module adopts the form of multiple plate and frame filter presses connected together to improve the reliability and coherence of the overall operation of the equipment. The compression pressure (18-20 MPa) and solid-liquid separation pressure (0.8-1 MPa) of the filter press can be adjusted according to the soil quality, and the water content of the filtered mud cake is about 30% (far below 40%). The intelligent path of the filter press module is reflected in the fact that the water content of the filter press can be adjusted by the integrated
The intelligent path of the filter press module is reflected in the detection by the water content sensor integrated in the filter press and the feedback to the central control room to control the change of the water content of the cake and the filter press effect in real time. The water content sensor measures the change in water content of the slurry between the plates and frames from injection to completion of the filter press.
