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Nonionic polyacrylamide is water-soluble polymers or polyelectrolytes. Because of its molecular chain containing a certain number of polar groups, it can through adsorption of suspended solid particles, so that the bridge between the particles or by charge neutralization and the particles agglomerate to form large flocs. Therefore, it can accelerate the sedimentation of particles in suspension, there is a very obvious solution to speed up the clarification, to promote filtering and other effects. Mainly used for a variety of industrial waste water flocculation settlement, sedimentation clarification. Such as paper and pulp wastewater wastewater treatment, waste water treatment, steel plant and stone processing plant wastewater treatment and other processing and metal smelting process.
Pendant nonionic polyacrylamide molecular chain amide group is lively, it can happen a variety of chemical reactions can get a variety of derivatives, but because of the close genetic effects, the reaction is often not fully carried out.
Because of the non-ionic polyacrylamide (NPAM) is a polymer or polymer electrolytes, the molecular chain gene can contain a certain amount of polar adsorption of suspended solid particles, so that the bridge between the particles form large floes. It accelerates particles in suspension in the settlement, there is a very obvious solution to speed up the clarification, promoting filtering effect.
Nonionic polyacrylamide flocculating effect is very strong, because it has:
1, to clarify purification;
2, promote settlement;
3, filtered promoted;
4, thickening effect and other effects.
In wastewater treatment, sludge dewatering, mineral processing, coal washing, paper, etc., can fully meet the requirements of various fields.
1, granular polyacrylamide flocculant is added to the sewage can not direct investment. It must first be dissolved in water before use, with its solution to deal with sewage.
2, dissolving particulate polymer should be clean water (such as water), it can not be sewage. The water can be at room temperature, generally does not require heating. Water temperature is below 5 ℃ dissolve very slowly. Temperature increase dissolve faster, but more than 40 ℃ will accelerate polymer degradation, affect the results. Usually tap water is suitable for the preparation of a polymer solution. Acid, alkali, high salinity of the water is not suitable for preparation.
3, the choice of the polymer solution concentration, Le Bang recommends 0.1% -0.3%, or 1 liter of water was added 0.1g-0.3g polymer powder.
Advantages of nonionic polyacrylamide flocculant is mainly used. Because of its molecular chain gene can contain a certain amount of polar adsorption of suspended solid particles, so that the bridge between the particles form large floes. Nonionic polyacrylamide can accelerate the sedimentation of particles in suspension, there is a very obvious solution to speed up the clarification, to promote filtering and other effects, widely used in the chemical industry waste water, waste water treatment, municipal sewage treatment. Especially when the water is acidic, the use of this product is most appropriate. Inorganic salts can be used in conjunction with inorganic flocculants iron polyethylene, polypropylene and aluminum.