Polyacrylamide

introduction

Polyacrylamide (PAM) is referred to as the initiator in the monomer polymerization under the action of the water soluble polymer, is one of the most widely used varieties of polymer materials, mainly used in oil extraction, water treatment, textile, papermaking, mineral processing, medicine, agriculture and other industries, polyacrylamide (PAM) by solid particles suspended in water adsorption, bridging between particles or particles through the charge and make the formation of large flocs. Therefore, it can accelerate the settling of particles in suspension, which can accelerate the clarification of the solution and promote the filtration effect. Cationic, anionic, non-ionic and other varieties complete, can meet the needs of all aspects.


Characteristic

1、flocculation: PAM can make suspended substances through electricity neutralization, bridging adsorption, flocculation.
 
2、adhesion: through mechanical, physical, chemical role, adhesion.
 
3、resistance reduction: PAM can effectively reduce the friction resistance of fluid, adding trace amount of PAM in water can reduce resistance to 50-80%.
 
4、thickening: PAM in neutral and acidic conditions have thickening effect, when pH value is more than 10, PAM easy hydrolysis, half mesh structure, thickening will be more obvious.

 application


1、used for sludge dewatering sludge according to the corresponding types of properties can choose this product, can be effective before the sludge into the filter press sludge dewatering, dehydration, floc, non stick cloth, filter without loose, the flow of mud cake thick, high dewatering efficiency, the cake moisture content below 80%.
 
2、for domestic sewage and organic wastewater treatment, the product in the coordination or alkaline medium are positive electricity, so that the sewage suspended particles with negative charge of sewage flocculation, sedimentation, clarification is very effective. Such as the production of grain alcohol wastewater, papermaking wastewater, waste water, city sewage treatment plant wastewater, monosodium glutamate wastewater, sugar wastewater, organic wastewater, high content of feed wastewater, textile printing and dyeing wastewater, with cationic polyacrylamide than with anionic, nonionic polyacrylamide or the effect of inorganic salts to several times or dozens of times, because this waste water is generally negative charge.
 
3、the flocculant for the treatment of tap water with river water as the source of water has the advantages of less dosage, good effect and low cost, especially with inorganic flocculants. It will become an effective flocculant for the waterworks in the Yangtze River, the Yellow River and other river basins.
 
4、reinforcing agent and other auxiliaries for paper making. Increase the retention rate of filler and pigment and the strength of paper.
 
5、used as an aid in Oilfield research, such as clay swelling inhibitor and thickener for oilfield acidizing.
 
6、for textile sizing agent, slurry performance is stable, less pulp, fabric breakage rate is low, the cloth surface is smooth.


parameter


Grade Molecular WEIGHT Charge density solid content  Dissolving time
 Anionic polyacrylamide  5-22 million  10%-50%  89% min  90 minutes max
 Cationic polyacrylamide   8-12 million  5% -60%  89% min  90 minutes max
 Non-ionic polyacrylamide   8-12 million  0%-5%  89% min  90 minutes max
 

attention

1、floc size: floc too small will affect the speed of drainage, floc too general to make floc bound more water, and reduce clay biscuits. The size of flocs can be adjusted by selecting the molecular weight of polyacrylamide.
 
2、Sludge characteristics. The first point is to understand the source, characteristics and composition of the sludge, and the proportion of the sludge. According to the different properties, the sludge can be divided into two kinds of organic and inorganic sludge. Cationic polyacrylamide for disposal of organic sludge, anionic polyacrylamide relative for inorganic sludge, strongly alkaline with strong acidic cationic polyacrylamide, and should not be used when anionic polyacrylamide, solid content of sludge is usually large amount of polyacrylamide.
 
3、floc strength: floc should be stable and not broken under shear action. Improving the molecular weight of polyacrylamide or selecting suitable molecular structures contribute to the improvement of floc stability.
 
4、the ion polyacrylamide: for the dehydration of the sludge, available in different degrees after ion flocculant do first test stop selection, select the best suitable polyacrylamide, so as to get the best flocculant dosage effect, and can make the least cost savings.
 
5、the dissolution of polyacrylamide: dissolved good talent, fully play the role of flocculation. Sometimes the demand accelerates the dissolution rate, and then the concentration of progressive polyacrylamide solution can be considered.
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