Nonionic polyacrylamide is a water-soluble polymer or polyelectrolyte. Because its molecular chain contains a certain number of polar groups, it can absorb solid particles suspended in water to bridge between particles or agglomerate particles to form large flocs through charge neutralization. Therefore, it can accelerate the settling of particles in the suspension, and has a very obvious effect of accelerating solution clarification and promoting filtration. It is mainly used for flocculation and sedimentation of various industrial wastewater, and sedimentation and clarification treatment. Such as papermaking and pulp wastewater treatment, wastewater treatment in mineral processing and metal smelting process, wastewater treatment in steel mills and stone processing plants, etc.
Function
Non-ionic polyacrylamide has a strong flocculation effect because it has:
1. Clarification and purification;
2. Sedimentation promotion;
3. Filtration promotion;
4. Thickening and other functions.
In waste liquid treatment, sludge concentration and dehydration, mineral processing, coal washing, paper making, etc., it can fully meet the requirements of various fields.
Principles of use
1. Granular polyacrylamide flocculants cannot be directly added to sewage. It must be dissolved in water before use, and its aqueous solution is used to treat sewage.
2. The water used to dissolve granular polymers should be clean (such as tap water), not sewage. Normal temperature water is enough, generally do not need to be heated. The water temperature is lower than 5°C and the dissolution is very slow. Increasing the water temperature increases the dissolution rate, but above 40°C will accelerate the degradation of the polymer and affect the use effect. Generally tap water is suitable for preparing polymer solutions. Water with strong acid, strong alkali and high salt content is not suitable for preparation.
3. The concentration of the polymer solution is recommended to be 0.1%-0.3%, that is, add 0.1g-0.3g polymer powder to 1 liter of water.
The advantages of non-ionic polyacrylamide are mainly used as flocculants. Because its molecular chain contains a certain amount of polar genes, it can absorb solid particles suspended in water and bridge between particles to form large flocs. Non-ionic polyacrylamide can accelerate the settling of particles in the suspension, and has a very obvious effect of accelerating the clarification of the solution and promoting filtration. It is widely used in the treatment of chemical industrial wastewater and waste liquid, and municipal sewage treatment. Especially when the sewage is acidic, it is most suitable to use this product. It can be used in conjunction with inorganic flocculants such as polyferric sulfate and polyaluminum chloride.
