Polyacrylamide, a type of high molecular polymer, comes in various models. The appropriate model for wastewater treatment in different industries must be selected through testing. Additionally, the process of adding the chemical is crucial, as improper use of polyacrylamide can lead to clumping, resulting in poor performance.
Reasons for the agglomeration of polyacrylamide dosing include: 1. Improper operation, such as rapid dosing dissolution, uneven dosing, and excessive dosing amounts, leading to agglomeration due to incomplete dissolution of polyacrylamide; 2. Impure water used for dosing dissolution, e.g., with excessive suspended matter, causing agglomeration; 3. The temperature of the water used for dissolution; 4. Poor quality of the chemical or presence of impurities; 5. Inadequate stirring, resulting in dead spots inside the dissolution tank.
To prevent the issue of gelling in polyacrylamide, it is generally recommended to dissolve it using tap water. The optimal concentration of polyacrylamide should be one part per thousand. First, stir the water, then gradually and evenly add the polyacrylamide while stirring to minimize clumping. Manual stirring should be done for 6-8 hours, while mechanical stirring should not be less than 40 minutes. If conditions allow, warm water can be used for dissolution.
If you fear insufficient dissolution leading to lumps, you can directly purchase liquid polyacrylamide for use. Additionally, if a polyacrylamide packaging bag has been opened, and it hasn't been sealed promptly, it is recommended to store polyacrylamide products in a well-ventilated and dry place to minimize the risk of lumps forming.