Spray dried PAC, Polyaluminium Chloride, abbreviated as PAC, molecular formula [AL2(OH)LnCl6-n]m, technical standard conforms to national GB15892-2003 standard, product appearance is High-grade white, mid-range light yellow powder. The characteristics of spray-dried PAC polyaluminium chloride depend on the operating principle of the pressure spray. The aluminum chloride produced by the pressure spray drying process is porous small particles or hollow small particles, which exhibits dustproofness and smoothness. Due to better contact with the water to be treated, its wettability and water treatment speed are stronger than other powdery products. Spray production not only drys the polyaluminum chloride, but also makes it into tiny particles. Polyaluminum chloride is a water-soluble substance and exhibits good thermal stability and solubility.
Physical and chemical properties
The spray-dried polyaluminum chloride product has good stability, adapts to wide water area, fast hydrolysis rate, strong adsorption capacity, and has the advantages of large sputum flower, fast dense sedimentation, low effluent turbidity and good dehydration performance, in the case of the same water quality. The dosage of spray-dried products is reduced. Especially in the case of poor water quality, the spray-dried product can be reduced by half compared with the drum-dried product, which not only reduces the labor intensity of the workers, but more importantly reduces the user's system. Water cost. In addition, spray drying products ensure safety and reduce water accidents. It is safe and reliable for residents to quote water.
Spray-type polyaluminium chloride, which is a polyaluminum chloride, is a new process product for polyaluminium chloride. Spray-type polyaluminum chloride has lower acidity than other inorganic flocculants.
The difference compared with ordinary polyaluminum chloride products:
1. The difference from the ordinary polyaluminum chloride production process:
Spray drying: liquid raw materials - pressure filtration - spray tower spray drying - finished products.
Ordinary drying: liquid raw materials - placement - drum drying - finished products.
2. The difference between the use effect of ordinary polyaluminum chloride products:
Strong absorption, rapid and large flocculation formation, low turbidity, and super dehydration. For the same water quality, spray-dried products are relatively small in amount compared to other products. Especially for highly polluted water, spray-dried products only need half of the amount of drum-dried products, which not only reduces labor intensity, but also reduces customer costs. In addition, excessive spray drying products will not cause pollution, avoid accidents and ensure the safety of drinking water.
Features:
In the spray polymerization aluminum chloride production process, since the nozzle uniformly sprays the mother liquid in the drying tower, the Al2O3 content is uniform and stable, and is easily controlled within the index range, thereby enhancing the adsorption capacity of the colloidal particles and cohesively Flocculation two effects, other drying methods can not be achieved, the salt base degree, that is, the degree of polymerization directly affects the water purification effect, Fengyue polyaluminum chloride using pressure type particle spray drying method is to maintain the original activity of the mother liquor Improve the degree of polymerization of the product, and at the same time adjust the size of the base according to the water quality. The drum drying is very easy to destroy the degree of polymerization, the product salt base interval is small, and the water quality surface is narrow. Due to the use of plate and frame pressure filtration technology, the water insoluble matter of the solid is below 0.3, and the water insoluble matter of the liquid is below 0.1, which can ensure the smooth flow of the user's pipeline and improve the drug utilization rate, and the natural sedimentation method cannot reach the same. .
1) A large number of positively charged, stable-form polynuclear hydroxyaluminum complexes can effectively promote flocculation and sizing.
2) The appearance is white and the iron content is extremely low, which can meet the needs of manufacturing high quality paper.
3) Polyaluminum chloride is a pre-hydrolyzate of aluminum chloride, the degree of hydrolysis is relatively low, and the pH value of the pulp is less than that of aluminum sulfate.
4) Using polyaluminum chloride to sizing, the retention and filtration of the slurry is significantly improved.
5) The paper performance is improved in different degrees except for the cracking and breaking length of the paper.
Polyaluminum chloride packaging and precautions
Polyaluminum chloride packaging:
1. External plastic woven bag with plastic film set, net weight 25kg per bag, can also be modified according to user requirements, and liquid polyaluminum chloride is sold.
2. This product is forbidden to be mixed, transported and stored with toxic substances. The products should be stored in a dry, ventilated and cool place indoors, and should not be damp.
3. Care should be taken when loading and unloading, and the storage period of solid products is one year. [1]
Polyaluminum chloride
1. When using, you should first make a small test according to the water quality, and choose the best point that the water purification effect is good and the dosage is small. The solution should be used with the solution, and the non-potable water should be selected according to the actual situation.
2. When using solids, first add water to dissolve the solution into 10-25%, then dilute the water to the desired concentration. When dissolving, add water and slowly feed, and continue to stir.
3. Different manufacturers or different grades of water treatment agents should not be mixed and should not be mixed with other chemicals.
4. The stock solution and diluent are slightly corrosive, but lower than other inorganic flocculants.
5. Product effective storage period: liquid for half a year, solid for two years. Solid products can still be used after the tide.
6. This product is properly dosed, and the water quality after purification meets the sanitary standard of drinking water.
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