Polyacrylamide (PAM) is a polymer that is widely used in various industries, including starch mills. In starch plants, PAM is used as a filter aid and fining agent, which helps to improve the quality and yield of starch. This article will introduce the application of polyacrylamide in starch plant and its principle of action in detail.
Hundred. 1.Drainage aid.
In the production process of starch, it is necessary to separate starch from impurities such as protein and cellulose. Traditional separation methods use centrifugal separation or sedimentation separation, but the results are not ideal. After the introduction of PAM, the extraction rate and purity of starch can be significantly improved through the effect of filtration aid. The drainage aid of PAM is mainly due to its good flocculation and adhesion properties, which can quickly and firmly adhere starch particles together to form flocculents that are easy to filter.
2.Clarification.
In addition to the drainage aid, the PAM also has a clarifying effect. During the processing process of the starch plant, a large amount of wastewater is generated, which contains a certain amount of useful components such as starch and protein. By adding PAM, useful components such as starch and protein in wastewater can be quickly settled, so as to achieve wastewater clarification. After clarification, the wastewater can be further utilized, so as to achieve effective use and conservation of resources.
Second, the principle of action of polyacrylamide.
The reason why PAM can play a significant role in the filtration and clarification of starch plants is due to its specific molecular structure and properties. The molecular chains of PAM are polar and can form hydrogen bonds with starch granules, thus achieving strong adhesion of starch granules. At the same time, the molecular chain of PAM is also hydrophilic, which can be fully stretched in aqueous solution to form a three-dimensional network structure with good elasticity and adhesion. This network structure can bring together a large number of starch granules to form a floc that is easy to filter.
In addition, the high molecular weight of PAM can form a dense adsorption layer, which can effectively reduce the osmotic resistance of the filter cake, thereby improving the filtration efficiency. At the same time, the chemical properties of PAM are stable and not easy to react with other substances, which ensures its long-term stable application in starch plants.
3. The use of polyacrylamide and precautions.
When using PAM, the appropriate model and dosage of PAM should be selected according to the specific situation and production needs of the starch plant. In general, a small amount of PAM can be used to achieve a significant drainage aid. In the process of use, the preparation method and addition sequence recommended by the manufacturer should be followed to avoid PAM failure or production due to improper preparation