There are many types of cationic polyacrylamide, and the choice is a problem for customers. The ionic degree of cationic polyacrylamide varies from 20 to 60. Today, Xiaobian will explain the treatment effect of 20 ion degree and 60 ion degree in sewage treatment.
The ionic degree is actually the charge density, the number of charged ions, the ionic degree determines the density of the flocculant, the specific choice of what kind of product depends on the nature of the water to be treated and the equipment used. The higher the ion degree, the larger the impurities in the sewage, the tighter, the cation is mainly for the negative charge in urban sewage and sewage, when the cation into the water, can produce impurities in the sewage bridge precipitation, which is what we often say sewage desilting, after input, you can see that the impurities in the sewage will soon precipitate, so that the water and impurities are separated, so that the operation of later desilting equipment.
For the amount of ionic polyacrylamide used in sludge dewatering, when we screen the cation ionic degree, the key depends on the following two points: First depends on the size of the flocculant, the flocculant is too small will affect the drainage speed, the flocculant will limit more water, thereby reducing the degree of mud cookies. The size of flocculant can be adjusted by selecting the ionic degree of polypropylene in sludge dewatering. The second is the strength of the flocculant, the flocculant should be stable and not broken under shearing. Increasing the molecular weight of cationic polyacrylamide or selecting suitable molecular structure is helpful to improve the stability of the flocculant. 10%-20% cations are mainly used in cabinet desilting machines; 30%-40% of the cations are mainly used for crawler desilting machines; 50% to 60% of the cations are mainly used in high-speed centrifuges.
We all know that the sludge produced by every industry is an inevitable product of sewage treatment. Before treatment, we need to understand the properties of the sludge, detect the composition and solid content, analyze the situation of the sludge, and then conduct product tests. Choosing the level of cationic ions to treat the sludge is very critical. Sludge treatment can be tested to select different ionic degree to obtain the best cation, improve the treatment effect, reduce the dose, reduce the cost.
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