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Polyacrylamide Use Characteristics
Oct 20, 2017

Polyacrylamide dissolved agglomeration phenomenon, the problem has been wrapped around the customer. Recently received the site customers said that the daily use of polyacrylamide flocculation dose and small test as much, but the effect is very unsatisfactory, and small test is very different, because these customers in the dissolved plus polyacrylamide flocculant, like A large number of one-time investment in polyamine, uneven mixing makes the phenomenon of agglomeration, so that the active ingredients did not play out. General manufacturers suggest that the product should be dissolved, should be slowly added to the water and a certain rate of mixing, to avoid reducing the caking phenomenon.

Polyacrylamide dissolution control factor

1, dissolved water quality. It is generally recommended to use pH-neutral low hardness water. If the use of dissolved inorganic or metal too much water, or the use of groundwater, river water, recycled water will easily reduce product performance.

2, dissolution time. If it is polyacrylamide dry powder dissolved, stirring at least for more than 1 hour to play the best performance, which can reduce the amount of products.

3, dissolved concentration. The usual dissolved concentration of the cationic flocculant is 0.2% (0.1% -0.3%) and the usual dissolved concentration of the anionic and nonionic flocculant is 0.1% (0.5% -0.15% feasible)

Because polyacrylamide model types are more general selection according to the sewage quality of the situation of the pilot selection. Purchase polyacrylamide, due to different manufacturers, the same parameters of the use of products are often different. When you choose the appropriate flocculant, to strictly operate, control the dissolution of a good solution to the polyacrylamide flocculant caking phenomenon.

Polyacrylamide use characteristics

1) Flocculation: PAM can make the suspended material through the electrical neutralization, bridging adsorption, from the flocculation effect.

2) Adhesion: through the mechanical, physical, chemical role, from the role of bonding.

3) drop resistance: PAM can effectively reduce the friction of the fluid, the water can be reduced by adding trace PAM 50-80%.

4) thickening: PAM in the neutral and acid conditions are thickening effect, when the PH value of 10 or more PAM easy hydrolysis. When semi-reticular structure, thickening will be more obvious

PAM principle of action

1) flocculation principle: PAM for flocculation, and floc type of surface properties, especially the potential, viscosity, turbidity and the PH value of the suspension, the particle surface of the dynamic potential is the reason for the addition of particles to join The surface charge of the opposite PAM, can move the potential to reduce the concentration.

2) adsorption bridge: PAM molecular chain fixed on the surface of different particles, the particles formed between the polymer bridge, so that particles formed aggregates and settlement.

3) Surface adsorption: PAM molecules on the polar groups of particles of various adsorption

4) Enhance the role: PAM molecular chain and dispersed phase through a variety of mechanical, physical, chemical and other effects, the dispersed phase implicated together to form a network, and thus enhance the role.