Polyaluminum chloride has strong bridging properties, and it is accompanied by physical and chemical processes such as coagulation, adsorption and precipitation during the hydrolysis process. Polyaluminium chloride is abbreviated as PAC. Also commonly known as polyaluminum or coagulant, it is a water-soluble inorganic high molecular polymer between ALCL3 and AL(OH)3, and its chemical formula is [AL2(OH)NCL6-NLm] m represents the degree of polymerization and n represents the degree of neutrality of the PAC product. The color is yellow or light yellow, dark brown, dark gray resinous solid. The fundamental difference between Guangfeng Polyaluminium Chloride and traditional inorganic coagulant is that the traditional inorganic coagulant is a low molecular crystalline salt, and the structure of the polyaluminum chloride is composed of a polymorphic multi-carboxy complex, which has a fast flocculation and sedimentation rate. It has a wide range of PH values, is non-corrosive to pipeline equipment, and has obvious water purification effect. It can effectively remove heavy metal ions such as SS, COD, BOD and arsenic and mercury in water.
Main features of polyaluminum chloride
This product has the following advantages over other coagulants:
1. Wide application range and wide adaptability to water. The water purification effect is obvious, the turbidity reduction rate is up to 96%, the decolorization rate is 60%, and the COD rate is 50%. It can effectively remove the coloring matter SS, COD, BOD and heavy metal ions such as potassium, lead and mercury in the water, oil and humus. .
2, flocculation and sedimentation speed is fast, excessive dosing will not cause water turbidity, when the water temperature is low, still can maintain a stable coagulation effect.
3. Its alkalization degree is higher than other aluminum salts and iron salts, and it is less corrosive to equipment.
4. Suitable pH range is wide (5-9).
Advantages of polyaluminium chloride
The cost of water for polyaluminium chloride is 20~80% lower than that of other inorganic coagulants; it can form flocs quickly, and the flower is large and fast; the water source adapts to various temperatures, and the solubility is good; the liquid product can adapt to automation Adding, it is less corrosive, convenient to operate, and it is not blocked for long-term use. If the customer has special requirements for quality, it can be produced according to the indicators provided by the customer.
Polyaluminum chloride application range
Mainly used for the purification of domestic drinking water and industrial wastewater, special water treatment (such as oily sewage, printing and dyeing papermaking wastewater, sewage treatment, smelting sewage, radioactive materials, toxic heavy metals such as Pb, Cr and fluorine-containing sewage, etc.), petroleum Drilling, tanning, metallurgy, papermaking and other industries.
Polyaluminum chloride use method
In order to achieve good flocculation effect and economic benefit, users can determine the appropriate dosage according to different raw water turbidity, different seasons and different pool shapes. The liquid product is formulated as a 5-10% aqueous solution, and the solid product is formulated as a 3-5% aqueous solution (by weight of the product). The higher the turbidity of the raw water, the thinner the solution should be, the higher the dosage, and the better the flocculation effect.
Classification of polyaluminum chloride
a. The liquid polyaluminum chloride is not dried, and has the advantages of no dilution, convenient loading and unloading, and relatively cheap price. The disadvantage is that the tanker is required for transportation, and the unit transportation cost is increased (the equivalent of 2-3 tons of liquid per ton of solid).
b. The form of solid polyaluminum chloride after drying has the advantage of convenient transportation, no tanker is needed, and the disadvantage is that it needs to be diluted when used to increase the working intensity.
Polyaluminium chloride precautions
a. Different manufacturers or different grades of water treatment agents should not be mixed and should not be mixed with other chemicals.
b. The stock solution and diluent are slightly corrosive, but lower than other inorganic coagulants.
c. Effective storage period of the product: liquid for half a year, solid for two years. Solid products can still be used after the tide.
d. The product is properly dosed and the water quality after purification complies with the sanitary standard of drinking water.
Polyaluminum chloride product packaging
The packaging is generally: a plastic film inside, and a woven bag outside. The factory packaging, pac English, neutral, or according to customer OEM, normal packaging and OEM, etc., no charge.
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