High purity polyacrylamide manufacturers because it has a clarifying and purifying effect, settlement promotion effect, filtration promotion effect, thickening effect and other effects. In the waste liquid treatment, sludge concentration and dehydration, mineral processing, coal washing, paper making, etc., it can fully meet the requirements of various fields.
Coal washing wastewater treatment scheme:
The treatment of slime water in coal preparation plant generally adopts the treatment process of “cyclone – concentrator – filter press (slime settling tank)”. Under normal circumstances, it is the purchase of polymer flocculant (polyacrylamide). The contact between polymer flocculant and slime particles or slime colloid neutralizes the electrical properties of the slime surface, reduces the surface energy, and makes the slime particles condense and precipitate. The molecular weight of polyacrylamide is generally between millions, and flocculants of different molecular weights should be selected for coal slime water of different particle size. Polyacrylamide can be divided into anionic polyacrylamide, cationic polyacrylamide and non-ionic polyacrylamide three types. When using polyacrylamide for water treatment, it is necessary to ensure that the type is consistent with the pH value of coal slime water, anionic polyacrylamide is suitable for alkaline coal slime water, cationic polyacrylamide is suitable for acidic coal slime water, anionic and cationic polyacrylamide are mixed, and the flocculation precipitation effect of coal slime water is better.
Anionic polyacrylamide
Anionic polyacrylamide Features:
1, good water solubility, can also be completely dissolved in cold water.
2, add a small amount of this anionic polyacrylamide product, can receive great flocculation effect. Generally only need to add 0.01~10ppm, you can fully play a role.
3, the use of anionic polyacrylamide products and inorganic flocculants (polyferric sulfate, polyaluminum chloride, iron salts, etc.), can show greater results.
The contribution of anionic polyacrylamide in sewage treatment is a large proportion, the molecular weight of anionic polyacrylamide is between 6 million and 25 million, and it can show a strong flocculation effect as long as a quantitative anionic polyacrylamide is added in use.
There are some common problems when using anionic polyacrylamide.
1, the dosage of too much or too little resulting in flocculation effect is not obvious.
2, the concentration ratio is too high, and the water quality is sticky after adding the drug.
3, the untested sewage selection does not match the polyacrylamide model.
4. The short dissolution time of polyacrylamide is not fully dissolved, resulting in poor flocculation effect.
5, the dissolution of the stirring rate is too high to cause the branch chain of polyacrylamide molecules to break and lose the adsorption bridging effect.
6. When used in winter, the dissolution water temperature exceeds 60°C, resulting in the early degradation of anionic polyacrylamide and the loss of flocculation.
Anionic polyacrylamide is generally used in wastewater treatment as a flocculant in the actual use process. Experience tells us that in fact, it is not the higher the molecular weight, the more expensive anionic polyacrylamide product effect is better, according to the sewage sample through experimental analysis to choose a more suitable polyacrylamide product is a good way to treat sewage.
