PAC is an inorganic polymer coagulant, the larger role of bridging the polymerization of hydroxyl ions and multivalent anions produced molecular weight, high charge of inorganic polymer water treatment chemicals. 1-3-4-3-9-1-1-8-9-3 Chinese name: PAC (polyaluminum abbreviation) Chinese alias: basic aluminum chloride; polychlorinated aluminum; hydroxy aluminum chloride; PAC English name: Polyaluminium Chloride, abbreviated as PAC EINECS: 215-477-2 Formula: Al2 (OH) nCl6-n Molecular Weight: 174.45 technical standards: drinking water quality in line with national GB15892-2005 standard. Appearance: white, yellow, brown, red-brown granular / flake product forms: powder solid liquid Physical properties: colorless or yellow resinous solid. Its solution is a colorless or brown transparent liquid, sometimes due to impurities and grayish black mucus. Poly (co) of aluminum chloride which flocculation performance is as follows: strong electricity a, colloidal substances in water and function. b, hydrolysates of excellent bridge suspended solids in water adsorption. c, selective adsorption of dissolved substances. PAC is an inorganic polymer coagulant, the larger role of bridging the polymerization of hydroxyl ions and multivalent anions produced molecular weight, high charge of inorganic polymer water treatment chemicals) features mainly by the pressure atomizer works it decided to make this drying system has its own characteristics. Since pressure spray drying the resultant product is a porous particulate or hollow particulate, using pressure spray drying, anionic polyacrylamide, and many more to obtain a granular product for the purpose of the resulting granular product with excellent dust and flow properties. Poly (co) Note the use of aluminum chloride and dosage 1, depending on the raw water conditions, do first small test before use to obtain optimum dose. For ease of calculation, to configure a small test solution weight ratio (W / W), generally with a 2 to 5% as well. If equipped with a 3% solution: poly aluminum chloride solid 3g, poured into a graduated cylinder 200ml wash, add water about 50ml, dilute with water to be dissolved to 100ml mark, shake well. 2, production of poly aluminum chloride by solid: water = 1: 9 to 1:15 weight ratio (liquid product uses 1: 2-1: 5) can be mixed and dissolved. Alumina content below 1% solution is easily hydrolyzed, will reduce the use of effects, the concentration is too high is not easy dosing uniform. 3, plus the amount of the best drug dosage determined by adding a small test and observe adjust on the fly. See, sedimentation alum less than turbidity large, the dosage is too small; see, for example alum large settling ponds and on the turn, residual turbidity is high, the dosing is too large, should be adjusted. PAC divided into two forms a, PAC undried liquid form, there is no dilution, loading and unloading easy to use, relatively cheap advantages, disadvantages tanker transport needs, increasing the unit transportation costs (per tonne The solid equivalent of 2-3 tons of liquid) form after the b, solid PAC dry, convenient transportation advantages, no tanker, the disadvantage is also needed to use dilution, increased work intensity.