With the development of industry, the environment on which people live is getting worse and worse. The country has taken corresponding measures. Environmental protection is what each of us should do. Clear waters and lush mountains are the real invaluable assets. Many manufacturers choose polyaluminum chloride to treat sewage, river water, reservoir water, groundwater, urban sewage, industrial water supply purification, various industrial wastewater, industrial wastewater and the recovery of useful substances in waste residues. Polyaluminum chloride is also used in sugar. Liquid refining, pharmaceutical refining, cement quick-setting, cosmetic raw materials and other industries.
Then with the wide application of polyaluminum chloride, many customers do not know how to choose polyaluminum chloride that meets the quality standards, and they are afraid of being cheated to buy cheap polyaluminum chloride. The selection criteria of polyaluminum chloride mainly depends on the three important indicators of alumina content, salinity and PH value:
1. Look at the alumina content
The alumina content in polyaluminum chloride is a measure of the effective components of the product, which has a certain relationship with the relative density of the solution. Generally speaking, the greater the relative density, the higher the alumina content. According to the content of aluminum oxide, it can be generally divided into 30%, 28%, 26%, and 24%. Most people think that the higher the content of aluminum oxide, the better the effect. The high content of polyaluminum chloride is used in the treatment of turbid sewage, but the suspended solids do not settle after being put in. The reason is that the water quality of some sewage is too acidic. Effective reaction is one of the reasons, and it may also be because the suspended matter in the water is too light, and the high content of polyaluminum chloride cannot effectively drive its precipitation to decline.
2. Look at the salinity
The degree of basicity of polyaluminum chloride is also sometimes referred to as the degree of alkalinity. The component that causes its morphological change is OH ion, and the index to measure OH ion is called the degree of basicity, also known as the degree of alkalinity. The basicity of polyaluminum chloride is between 40% and 95%. This standard and The same content of aluminum oxide can be adjusted, and can be customized according to the needs of users. Our common products such as industrial grade polyaluminum chloride have a basicity of about 85%, while in drinking water grade polyaluminum chloride In aluminum, the salinity is about 45%. In the production of polyaluminum chloride, the lower the basicity, the more raw materials for production, so the higher the basicity, the lower the cost. In industries with high sewage turbidity, the use of polyaluminum chloride products with higher salinity is better, while in industries with low sewage turbidity, the use of polyaluminum chloride products with high salinity will cause sewage If it becomes turbid, it cannot effectively purify the water. At this time, it is necessary to use polyaluminum chloride with low salinity. Therefore, it is not that the higher the salinity, the better the product effect, 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 value range of polyaluminum chloride, and the appropriate pH range can achieve the best use effect in terms of treatment effect. Before using polyaluminum chloride, it is necessary to understand the pH value range of polyaluminum chloride, and then measure the pH value of water. It is necessary to adjust the pH value of the raw water. Only when the pH value of the source water is adjusted to the pH value range of polyaluminum chloride can the flocculation effect be achieved significantly.
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