Introduction and use of Gaoan white polyaluminum chloride

White polyaluminum chloride is a white or milky milk powder fine powder that is spray dried from aluminum hydroxide powder and high purity hydrochloric acid and melts when exposed to air. Also known as: spray drying polymeric aluminum chloride is an inorganic polymer flocculant. Through the function of the hydroxyl ion functional group and the polyvalent anion polymerization functional group, an inorganic polymer having a large molecular weight and a high charge is produced. The pH value of the product itself is between 3.5-5.0, applicable to PH value range of 5.0-9.0, and the best PH value is 6.5-7.6. With the improvement of people's water quality requirements, Huiyuan Water Supply Co., Ltd. has developed a method for improving the quality of raw water quality monitoring files based on the quality of raw water from all parts of the country, including high temperature, high turbidity, low temperature, low turbidity, and algae and trace chemicals. Polyaluminum Chloride Series: 1. Polyaluminum Chloride has a large molecular structure, strong adsorption capacity, low dosage, and low processing cost. 2. It has good solubility and high activity. It has a large flocculation of water in the body of water, and it has quick sedimentation, which is 2-3 times larger than other inorganic flocculants. 3. It has strong adaptability. It is affected by the PH value and temperature of the water body. After the purification of raw water, it reaches the national reference water standard. After treatment, the water content is low in cation and anion, which is beneficial to the preparation of ion exchange treatment and high purity water. 4, Corrosion is small, easy to operate, can improve the labor intensity and labor conditions of the dosing process.
The main application areas of white polyaluminum chloride:
1. Water treatment: domestic water, industrial water;
2. Urban sewage treatment;
3, the treatment of industrial waste water, sewage, sludge and certain slag recovery in the sewage;
4. For some difficult-to-treat industrial wastewater, use PAC as a matrix, incorporate other agents, and deploy it into a composite PAC. The treatment of wastewater can be surprisingly effective.
White polyaluminum chloride production methods and storage conditions:
1. Aluminum ash hydrochloric acid method Aluminum ash (mainly composed of aluminum oxide and aluminum alloy for fishing) is added to a reactor preliminarily added with washing water according to a certain ratio, and hydrochloric acid is gradually added under stirring to carry out polycondensation reaction, and aging polymerization is performed until pH is reached. The value of 4.2 to 4.5, the solution relative density of about 1.2 precipitation, to obtain a liquid polyaluminum chloride. The liquid product is diluted and filtered, evaporated and concentrated to dry to obtain a solid polyaluminum chloride product;
2. Boiling pyrolysis process The crystalline aluminum chloride is boiled and pyrolyzed at 170°C, and the evolved hydrogen chloride is absorbed by water to make 20% hydrochloric acid and recovered. Then add water at 60 ° C or more aging polymerization, and then curing, drying and crushing to obtain a solid polymer aluminum chloride products.
3, transport precautions: During transportation to prevent rain and sun exposure, should prevent deliquescence. Be careful when loading and unloading to prevent damage to the package.
4. This product is forbidden to be mixed, transported and stored with toxic substances. The product should be stored indoors in a dry, ventilated, cool place, and should not be exposed to moisture.
5. Be careful when loading and unloading. The storage period of solid products is one year.
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