Any product or commodity has a shelf life, and polyacrylamide is no exception. We all know that polyacrylamide is divided into four types: anionic, cationic, nonionic, and zwitterionic. The four types of polyacrylamide shelf life Not the same. Polyacrylamide is divided into solid and liquid according to the form, and the shelf life of solid and liquid products is different. Then, we will introduce the shelf life of different types of polyacrylamide products.
Polyacrylamide is a flocculating material suitable for storage in a suitable dry environment. If the environment is dark and damp, it will be a phenomenon of amide agglomeration. If this phenomenon will not be used, we will give a detailed introduction below. : Many sewage treatment plants are often encountered, especially in the south. Due to the humid climate, polyacrylamide in some sewage treatment plants has been piled up for a long time or the packaging mouth is not tight, resulting in moisture absorption and agglomeration, and agglomeration of polyacrylamide flocculant. In fact, many people have doubts, is it invalid, can not be reused, in fact, as long as you can dissolve it, the viscosity of the aqueous solution, there is no failure, but the polyacrylamide after agglomeration is difficult Dissolving, in fact, means a waste of resources. The shelf life of different kinds of polyacrylamides is quite different. This is related to its structure. Relatively speaking, the anionic polyacrylamide has a long shelf life. Cationic polyacrylamide generally has a shelf life of 1 year. Exceeding this period is considered to be beyond the shelf life. There is a risk of failure,
Polyacrylamide failure can be judged from two aspects, one is the viscosity reduction, and the other is the flocculation effect is worse.
The shelf life and concentration of the formulated polyacrylamide solution are related. The shelf life of the normally configured solution is 7 days, and the corresponding period of the 3%-5% shelf life is longer, but it needs to be diluted at the time of dosing. The polyacrylamide solution cannot directly treat the sewage.
To preserve solid polyacrylamide, it is necessary to pay attention to moisture and heat. The dry powder should be placed in a cool and ventilated place to prevent the reaction with other chemical materials.
