Three selection indicators of polyaluminum chloride

General Secretary Xi emphasized that 'lucid waters and lush mountains are golden mountains and silver mountains'. With the development of industry, the environment in which people live is getting worse and worse. Environmental protection is an obligation that each of us should fulfill.Many manufacturers choose polyaluminum chloride to treat sewage, river water, reservoir water, groundwater, urban sewage, industrial water purification, recovery of useful substances in various industrial wastewater and waste residues, polyaluminum chloride is also used in sugar refining, Pharmaceutical refining, cement quick-setting, cosmetic raw materials and other industries.

With the wide application of polyaluminum chloride, many customers do not know how to choose polyaluminum chloride that meets the quality standards. In fact, there are three selection criteria for polyaluminum chloride: alumina content, basicity and pH value.

1. Look at the alumina content

The alumina content is a measure of the effective components of the product, and it has a certain relationship with the relative density of the solution. Generally speaking, the higher the relative density, the higher the alumina content.According to the content of Al2O3 in the composition, it can generally be divided into 30%, 28%, 26%, and 24%. Most people think that the higher the Al2O3 content, the better the effect, but for the treatment of low-turbidity sewage, use high content of polyaluminum chloride, but the suspended matter does not settle after being put in. The reason is that the water quality of some sewage itself is too acidic, and the product with higher polyaluminum chloride content is acidic, which cannot be effectively reacted to it, and may also It is because the suspended solids in the water are too light.

2. Look at the basicity

The component that causes polyaluminum chloride to change its form is OH ion, and the index to measure OH ion is called basicity, also known as alkalization degree.The basicity of polyaluminum chloride is between 40% and -95%. This standard can be adjusted and produced according to the needs of users.The basicity of our common industrial-grade polyaluminum chloride is about 85%, and the basicity of drinking-grade polyaluminum chloride is about 45%.In industries with high turbidity of sewage, the effect of using polyaluminum chloride with high basicity is better, while in industries with low turbidity of sewage, the use of polyaluminum chloride with high basicity will make the sewage turbid .Therefore, it does not mean that the higher the basicity, the better the effect of the product, it depends on the specific use environment.

3. Look at the pH value

In the process of using polyaluminum chloride, it is necessary to understand the pH range of polyaluminum chloride and the appropriate pH range to achieve the best treatment effect.Before use, you must first understand the pH range of polyaluminum chloride, and then measure the pH value of the water. When the pH value of polyaluminum chloride is not reached, in order to make the raw water flocculate better, we usually need to adjust the pH value of the raw water To the pH range of using polyaluminum chloride.

Thank you for your attention to Jiangsu Lanyao Water Purifier Co., Ltd.: clean water world, return your water to clean!Our company is committed to the research and development, production and sales of polyaluminum chloride, polyferric sulfate and other pharmaceuticals. If you have any purchase intention, please contact 13395167688.