The type of polyacrylamide used in the stacked screw sludge dewatering machine is cationic polyacrylamide, but the cation degree must be high in order to make the sludge dense and the drying effect is good. When the shaft is driven in a helical manner, several fixed and mobile polyimide films located in the external field of the shaft move relative to each other. Under this action, water filters out from the winding gaps that move relative to each other, completing rapid concentration.

The concentrated polyacrylamide sludge moves forward with the rotation of the spiral axis. Along the inlet and outlet of the filter cake, the pitch of the spiral shaft slows down, the gap between the rings also slows down, and the volume of the spiral cavity becomes smaller. Under the back pin of the inlet and outlet, the air pressure slowly rises. Under the operation of the screw rotating shaft, the water in the sludge is quenched, the solid content of the anaerobic granular sludge is increased, and the sludge drying is finally completed.

Because of the complex composition of sludge, the filter press with industrial equipment alone can not meet the water content specifications. Sludge dewatering agent is a reagent to assist the moisture content of sludge in industrial equipment. Polyacrylamide is very effective. How much is used. Purified water will solve the problem of sludge dehydrating agent for many customers today: sludge dewatering is to dehydrate and dry the wastewater according to the sediment sludge in the inclined plate sedimentation tank and add chemical agents, which can not only achieve better and stronger sludge moisture content so that the sludge can be treated more strongly.

Which agent is added depends on whether the sludge is organic chemical sludge or inorganic sludge. Cationic polyacrylamide must be added to organic chemical sludge, such as municipal engineering sludge dehydration, slaughterhouse sludge dehydration, etc. Inorganic sludge sludge must use cationic polyacrylamide or polyaluminum chloride, such as sand washing plants, coal preparation plants, mining plants, etc. There are many kinds of sludge dehydrants, and cationic polyacrylamide and anionic polyacrylamide are commonly used. So what agent to add, the actual effect of dewatering the sludge is stronger. Lower costs. In order to achieve a stronger desiccation effect and lower dosage, the decision to add drugs and samples must be based on the analysis and inspection of the sludge.

The amount of sludge dewatering agent polyacrylamide coagulant should be calculated according to the melting concentration. The common melting ratio of cationic polyacrylamide is 1/1000 and that of anionic polyacrylamide is 2/1000. Sludge dehydrating agent solution is mainly machine. After the equipment evenly dosing the sludge, the sludge passes through the solid-liquid separation device.