1, scale inhibition: polyacrylamide is easy to form aggregates in water, thus forming sludge and scale inhibition, while sodium hexametaphosphate can destroy the structure of polyacrylamide aggregates, prevent them from forming scale inhibition on the surfaces of pipelines and equipment, and ensure the smooth flow of water.
2. Dispersibility: Polyacrylamide can increase the viscosity and cohesiveness of suspended particles in water, leading to particle deposition and siltation, while sodium hexametaphosphate can disperse particles, keep them suspended and prevent siltation and sedimentation.
3. Reduce the surface tension of water: Polyacrylamide can reduce the surface tension of water and increase the contact area between water and organic substances such as oil, thus accelerating the separation of oil-water mixture, while sodium hexametaphosphate can enhance the degradation of polyacrylamide and increase its decomposition speed, thus accelerating the oil-water separation process.