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- The main applications of polyacrylamide(PAM,FLOCCULANT)
Excellent performance of non ionic polyacrylamide in various industries
Non ionic polyacrylamide in the industry's excellent performance, the use of non ionic polyacrylamide mainly as a water treatment agent, the application range is also more and more widely. Has been involved in the oil, textile, paper and other industrial fields.
First, the advantages of non ionic polyacrylamide
The main advantage of nonionic polyacrylamide as flocculant. Due to the solid particles containing a certain amount of its molecular chain polarity gene can adsorb the suspended particles, the formation of large flocs build bridge. Nonionic polyacrylamide can speed up the settlement of particles in suspension, have obvious to speed up the solution to clarify, promote the effect of filtration, widely used in chemical industry waste water, wastewater treatment, municipal sewage treatment. This product is the most suitable for the use of this product, especially when the sewage is acidic. With inorganic flocculants poly aluminum iron, etc. with the use of inorganic salt.
Two, non ionic polyacrylamide as water treatment materials, excellent performance
1, For the textile industry
Nonionic polyacrylamide for textile, slurry, the stability of the slurry performance, little mortar, fabric breakage rate is low, clean cloth.
2,Used in the oil field
Nonionic polyacrylamide is widely used in petroleum industry, such as oil drilling, drilling mud, waste mud treatment, prevent water channeling, reduce friction and improve the recovery rate, the three oil recovery has been widely used.
3,Used in papermaking industry
Nonionic polyacrylamide in papermaking industry by two points, one is to improve the packing, pigmentretention rate. In order to reduce the loss of raw materials and pollution to the environment; the second is to improve the paper strength (including dry strength and wet strength). In addition, the use of PAM can also improve paper tearing resistance and porous, to improve vision and printing performance, but also for food and tea packaging paper.
4,For some other areas
Nonionic polyacrylamide can be used for some other areas, such as the food industry for cane sugar, beet sugar production in sugar cane juice and syrup phosphorus float extraction. Enzyme preparation fermentation liquid flocculation clarification industry, also for the recovery of protein feed, stable quality, good performance, recovery of the protein powder on chicken survival rate increased with increasing weight, no adverse effect on egg production, synthetic resin coating, construction material for grouting and blocking water, building materials industry, improve the quality of cement, construction adhesive, sealant repairplugging agent, soil improvement, electroplating industry, printing and dyeing industry.
High turbidity wastewater in life and industry in the presence of often so that everyone is very worried, how to deal with high turbidity polyacrylamide wastewater? Northwest high turbidity cement sand content greatly, sometimes more than 300kg / m3, but the more than 80% of the particle diameter greater than 5 mu, is easy to be adsorbed by polyacrylamide (PAM), generate large aggregates and accelerate their settlement. By means of treatment of high muddy water is an important means of northwest water treatment in china. Many researchers have proved that as high polymer polyacrylamide into the water after adsorbed on the surface of suspended solids in water, and obey Lang Gemao isothermal adsorption model of. Polyacrylamide to a part of the molecular chain attached to the suspended particles surface one or multiple adsorption sites, while the remaining part is extended to the water, contact the spatial position of the extension and other suspended particles still adsorption capacity, namely, the completion of bridging role. And aggregation of suspended particles up to a certain size of aggregate, its size only by the stirring intensity caused by shear gradient and began to be adsorbed in the total number of particles on the surface of polymer control; if the adsorption site is a lot of polymer chain segment accounted for, it will hinder the bridging role of; if all the adsorption site is occupied to, bridging role simply terminates. On the contrary, if only a small number of adsorption sites occupied, it will be difficult to resist the bridging effect produced by mixing due to shear knife.
Polyacrylamide (PAM) belongs to the large molecular groups, the thermal stability of the solid than other polymer electrolytes is stronger, is heated in a nitrogen filled environment temperature exceeds 210 degrees Celsius, adjacent to the amide to decompose water loss, but the temperature can not more than 300 degrees Celsius, and at the same time will generate imides, and the release of nitrogen.
When the temperature rises to 500 degrees Celsius, the polyacrylamide turns into a black powder. If the polyacrylamide has been fully dry, the temperature rises to 280 degrees Celsius, the time is still able to maintain a good stability. But because there are a large number of amide groups and ionic groups in the molecular chain, which makes the polyacrylamide has a strong moisture absorption;When dry, with strong water retention, is not easy to fully dry; dry solid powder in the medium to long term, because they absorb the moisture in the air, then easy to damp. An aqueous solution of polyacrylamide ages prone to aging, viscosity is also reduced performance therefore also becomes poor, affected.