Can polyaluminum chloride directly treat sewage?
Sinowin polyaluminum chloride, polyacrylamide manufacturer, production: 26%, 28%, 30% polyaluminum chloride, eliminating intermediate links, providing first-hand ex-factory prices to dealers and users across the country, long-term cooperation volume is more favorable !
A customer consulted the technical staff of the polyaluminum chloride manufacturer: "their factory thinks that it is too troublesome to dissolve the polyaluminum chloride before use. Can the water purifier not dissolve the sewage directly?" Regarding this question, the answer of Runquan Water Purification is , Polyaluminum chloride can be used directly, but it will definitely cause economic losses to you! The polyaluminum chloride water purifier is directly added to the sewage, which will quickly wrap the suspended matter and flocculate and precipitate, causing equipment blockage, and the dosage of the water purifying agent is 2-3 times that of the polyaluminum chloride aqueous solution. Directly lead to an increase in the cost of use.
Polyaluminum chloride is an inorganic polymer water purifier, which is produced by the bridging effect of hydroxide ions and the polymerization of polyvalent anions. Polyaluminum chloride has a fast flocculation and precipitation speed, is suitable for a wide range of PH value, is non-corrosive to pipeline equipment, has obvious water purification effect, and can remove SS, COD, BOD and heavy metal ions such as arsenic and mercury in water. Correct use of polyaluminum chloride: 1. When using water purifier, a small test should be carried out according to the water quality, and the point with good water purification effect and small dosage should be selected. The solution should be used with the preparation, and the amount of non-drinking water should be selected according to the actual situation. 2. When using solids, first add water to dissolve and form a 10-25% solution, and then dilute with water to the desired concentration. When dissolving, add water first and slowly feed the material, and keep stirring. 3. Water treatment chemicals of different manufacturers or different brands cannot be mixed, and must not be mixed with other chemicals. 4. The stock solution and diluent are slightly corrosive, but lower than other various inorganic flocculants. 5. Product storage period: liquid six months, solid two years. The solid product can still be used after it has been wet. 6. The water purifying agent polyaluminum chloride is added reasonably, and the purified water quality meets the sanitary standards for drinking water.
First of all, the national standard of alumina content of polyaluminum chloride is generally 28%. The hydrolysis of aluminum means that the aluminum ion is hydrolyzed and ionized. Since aluminum is an amphoteric hydroxide, double hydrolysis will occur. When the concentration of polyaluminum chloride solution is less than 3% When the concentration of the solution decreases, the ionization rate of aluminum is large, so that the coagulation mechanism cannot be generated.
For the initial use of polyaluminum chloride, the solid product can be dissolved in water into a 10% liquid before use, or a small test can be carried out to determine the concentration and dosage according to the raw water conditions. It is also suggested that the use of polyaluminum chloride in sewage treatment can be used in conjunction with polyacrylamide to achieve better results. Add polyaluminum first and then add polypropylene milling amine separately to avoid affecting the treatment effect.