Polyacrylamide, also known as Poly (acrylamide) in English, has a CAS number of 9003-05-8 and a molecular formula of (C3H5NO) n. Polyacrylamide is a linear organic polymer and a high molecular weight water treatment flocculant product that can specifically adsorb suspended particles in water. It plays a bridging role between particles, allowing fine particles to form larger flocs and accelerating sedimentation. This process is called flocculation, as PAM serves as a flocculant for water treatment and is widely used in wastewater treatment due to its excellent flocculation effect. Polyacrylamide mesh size: Mesh size refers to the particle size or fineness of the material, and mesh size is the number of squares per unit area. Generally defined as the number of mesh holes in a 1 inch * 1 inch area, that is, the mesh size of the sieve.
The characteristics of polyacrylamide:
1. Flocculence. PAM can neutralize suspended substances through electricity and play a flocculation role
2. Adhesion. It can play a bonding role through physical and chemical reactions, etc
3. Thickening properties. Under both neutral and acidic conditions, PAM has a thickening effect. If the pH value is above 10, PAM is easily hydrolyzed.
Polyacrylamide is an important water-soluble polymer that possesses valuable properties such as flocculation, thickening, shear resistance, drag reduction, and dispersibility. These properties vary depending on the derivative ions. Therefore, it is widely used in sectors such as oil extraction, mineral processing, coal washing, metallurgy, chemical industry, papermaking, textiles, sugar production, medicine, environmental protection, building materials, and agricultural production.
Conditions that affect the effectiveness
Under normal circumstances, the coagulation efficiency of polyacrylamide increases with the increase of usage, but excessive use can reduce the effect and turn it back into a stable colloid. Secondly, flocculation time: the combination of organic and inorganic flocculants is characterized by the ability to obtain the largest particle flocculent and coagulate or adsorb oil droplets. If the speed is too slow and the time is too short, the flocculant cannot fully contact the solid particles, which is not conducive to the flocculant capturing colloidal particles; And the concentration distribution of the flocculant is also uneven, which is not conducive to the effectiveness of the flocculant. The use effect of polyacrylamide is also related to water temperature: at low water temperatures, the reaction rate is too slow, the hydrolysis time increases, and it affects the amount of water processed. At the same time, excessive viscosity can also cause the tearing effect of the flocculant to become smaller. When the water temperature is high, the reaction speed is too fast, resulting in small flocs.
As long as you master the above essentials, I believe that when using polyacrylamide flocculants, you will avoid misunderstandings and greatly increase the flocculation effect.