What are the reasons for the decrease in flocculant viscosity? When we use flocculant, sometimes when the viscosity of the flocculant solution drops, it is still good yesterday. This phenomenon has appeared today. Many people first responded by buying fakes. So what is it? Not a fake? In fact, our first day of use is still normal, the next day there is such a problem, it excludes the factor of fakes; in fact, the viscosity of the flocculant solution decreases, then the reasons for the decline can be divided into the following aspects:
1. Flocculant storage time: The viscosity of the PAM solution will degrade more and lower with the increase of storage time, and the flocculation effect will be worse. In general, the anionic PAM solution can be stored for seven days, while the cation can be stored for 24 hours. This is mainly due to the hydrolysis of the amide group and the increase in the content of the hydroxyl group. In particular, the influence of the cationic group is more pronounced, and the removal of the NH3 by the amide group to form the imide group is caused by an increase in the rigidity of the molecular chain.
2, the effect of mechanical action of flocculant: stirring can improve the dissolution rate of PAM flocculant dry powder, high speed stirring speed, will cut the molecular chain of PAM, it is recommended to control the speed of stirring at an online speed of 60 rev / min, do not use high-strength Mixing instruments and high speed conveying equipment.
3, temperature effect: 0.1% PAM solution, when the temperature reaches 80 ° C -90 ° C, 18 million molecular weight will degrade to about 5 million in 2-4 hours, with the increase of temperature, the faster the degradation. Stable at room temperature 25 ° C.
4, the impact of light: the light will increase the temperature, so that PAM dissolution and degradation, direct irradiation of ultraviolet light will dissolve quickly degradation.
5, the impact of impurities: Dissolve PAM dry powder, the use of neutral water, water hardness, or contain impurities, will affect the viscosity of PAM and the effect of use.
The above points are the reasons for the viscosity reduction of the flocculant, so users should pay attention to these factors when using the flocculant, try to avoid this phenomenon. If you have any questions about the flocculant, you can consult us, we will For you to solve.
