Features: 

 ⑴ at room temperature, chemical stability, long storage is not bad, solid bare easy to absorb moisture, but not bad, non-toxic harmless. 

 PH value of water to adapt the scope of ⑵ 4-14, but the range of PH value is 6-8 the best treatment. 

 ⑶ processing water adaptability, quick reaction, consumption of drugs less, and low cost of water, alum big, quick settlement, taking into account, and can improve equipment utilization. 

 Usage: 

 ⑴ the solid product with water at room temperature 1:2.5-1:3 (weight ratio) mixture stirred for 30 minutes, and other drugs completely dissolved, add 30-40 times diluted with water or diluted into a liquid according to the required concentration before use. 

 ⑵ source water turbidity in the 100-500mg / L, the dosage is 5-10mg. Before the best use of small scale based on water quality characteristics, select the best value, and then put into use. 

 Mechanism: 

 a, colloidal substances in water and the role of strong electric use. 

 b, hydrolysis products of the fine suspension bridge in the water adsorption. c, on the selective adsorption of dissolved substances. 

 Category: 

 a, the liquid form of PAC is not dry, there is no dilution, loading and unloading easy to use, relatively cheap, advantages, disadvantages is the need for tanker transport, the unit transport costs (equivalent to 2-3 tons per ton of solid liquid) 

 b, the solid aluminum chloride dried form, has the advantages of convenient transportation, no tankers, the disadvantage is the use of dilution will also be required to increase the work intensity. 

 The main indicators of PAC 

 (A) basicity. PAC in some form or degree of hydroxylation is called the degree of basicity of alkali or alkaline degrees. Al molar ratio of hydroxyl general use B = [OH] / [Al] expressed in percentage. PAC basicity is one of the most important indicators, and flocculation has a very close relationship. The higher the concentration of raw water, the higher the salinity, the better the flocculation. To sum up, in the raw water turbidity of 86 ~ 10000mg / L range, the best basicity PAC from 40% to 85%, and the PAC and many other features are related to basicity. 

 (B) pH value. PAC solution pH is also an important indicator. It said the solution the number of OH-free state. PAC with basicity pH value is generally increasing, but for different composition of the liquid, its pH value and basicity does not exist between the corresponding relationship. With the same degree of concentration in the liquid base, when the concentration is not the same time, the pH value is also different. 

 (C) of the alumina content. PAC is the product of alumina content of the active ingredient of the measure, the relative density of the solution it has some relationship, in general, the greater the relative density, the higher the alumina content. PAC alumina content on viscosity, viscosity increases with increasing alumina content. Under the same conditions, under the same concentration of alumina, aluminum chloride is more conducive to transport and use.