The preparation process of polyacrylamide powder is a crucial step in the production of polyacrylamide emulsion. Polyacrylamide is a significant polymer widely employed in various industries, including water treatment, sludge precipitation, and textile printing and dyeing. Investigating the transformation of polyacrylamide powder into an emulsion is essential for enhancing its industrial usability. This article delves into the preparation process of polyacrylamide powder, discussing key steps in producing polyacrylamide emulsion, aiming to provide valuable information for practitioners in related fields.
Efficient Dissolution Method:
- Dilution and Dissolution:
- Use clean tap water to dilute and dissolve polyacrylamide powder or emulsion in a specific ratio. No heating is necessary; regular water is sufficient. Ensure complete dissolution before use.
- Selection of Dissolution Water Quality:
- Use tap water for dissolution, ensuring water cleanliness. Clean water is a prerequisite for ensuring the effectiveness of polyacrylamide.
- Determine Dissolution Ratio:
- Weigh the required polyacrylamide powder or emulsion, typically dissolving at a ratio of 0.1-0.3%. In other words, add 1-3 kg of polyacrylamide powder or emulsion to 1 ton of water.
- Prepare Dissolution Equipment:
- On-site, equip a dissolution tank or pool with an appropriate stirring device. The stirring rate should be 60-200 rpm, and avoid using iron, as iron ions can lead to degradation.
- Stirring Process:
- Before starting stirring, add a certain amount of water to the dissolution tank or pool to ensure water covers the stirring blades. Then, open the stirring and slowly add the weighed polyacrylamide agent evenly to the water. The mixing time is between 40 and 60 minutes.
- Check Solution Quality:
- After thorough stirring, the dissolved aqueous solution should be a clear, colorless, viscous liquid. Regularly inspect the product’s quality to ensure it meets specifications.
Notes:
- When adding the agent, pay attention to a slow and uniform addition to prevent clumping. Slow and even addition ensures the full dispersion of the agent in water, enhancing solubility.
Cationic Polyacrylamide Usage Details:
- Used for Sludge Dewatering:
- Recommended concentration is around 0.2%.
- Recommended stirring time is 50 minutes.
- Before use, conduct a small test to determine the ratio.
- Extract 100 ml of domestic sewage, inject 0.5 ml each time, conduct a mixing test, observe coagulation effect, coagulation speed, clarified liquid status, and sedimentation effect.
- Recommended solid dry powder usage for industries such as papermaking, chemical wastewater, sewage treatment, and beneficiation plants is 10-20g per ton of wastewater.
- Anionic Polyacrylamide Usage Details:
- Used for Wastewater Treatment Coagulation and Precipitation:
- Recommended concentration ratio is 0.1%.
- Recommended stirring time is 40 minutes, with a speed of 40-60 rpm.
- Before use, conduct a small test to determine the ratio.
- Extract 100 ml of domestic sewage, inject 0.5 ml each time, conduct a mixing test, observe coagulation effect, coagulation speed, clarified liquid status, and sedimentation effect.
- Non-Ionic Polyacrylamide Usage:
- Recommended dosage is 0.1%, dissolved within 50 minutes, with the same operating method as anionic polyacrylamide.
By conducting in-depth research on how to turn polyacrylamide powder into an emulsion, we have gained a deep understanding of the critical links and key points of this process. Developing high-performance polyacrylamide emulsion not only improves its applications in water treatment, sludge settling, textile printing and dyeing but is also of significant importance for the sustainable development of industries.
