Polyaluminum chloride is a coagulant widely used in the field of water treatment, and is favored for its good coagulation effect and wide range of applications. However, different application scenarios and process conditions have different requirements for the type and specification of polyaluminum chloride, so how to correctly select the model has become an important issue. This article will focus on the selection of polyaluminum chloride, ** how to choose the right polyaluminum chloride model according to different needs.
1. Models and specifications of polyaluminum chloride.
Polyaluminum chloride can be divided into a variety of types according to its salt base, alumina content, hydrolysis and other indicators, such as spray drying type, plate and frame filter press type, drum drying type, etc. Different types of polyaluminum chloride also have differences in appearance, solubility, impurity content, etc. Therefore, it is necessary to select the appropriate model and specification according to the actual situation.
Second, the selection basis of polyaluminum chloride.
1.Treatment of water quantity and quality.
The treated water quantity and water quality are important bases for the selection of polyaluminum chloride. For water with a small amount of water and low turbidity, polyaluminum chloride with a lower salt base can be used; For water with large water volume and high turbidity, polyaluminum chloride with a high salt base needs to be selected. At the same time, according to the content of other impurities in the raw water, such as fluorine, heavy metals, etc., different types of polyaluminum chloride can also be selected.
2.Process conditions.
Different process conditions also have an impact on the selection of polyaluminium chloride. For example, in flow cytometry or moving bed processes, polyaluminium chloride with a lower salt base is used; In the pressurized or inclined tube sedimentation tank process, polyaluminium chloride with a higher salt base can be used. In addition, different dosing methods and dosages will also affect the selection.
3.Cost and dosage.
The cost and dosage of polyaluminium chloride are also factors to consider when selecting the model. Generally speaking, polyaluminum chloride with a lower salt base has a lower cost, which is suitable for scenarios with better water quality and small dosage; The polyaluminum chloride with a high salt base is suitable for scenarios with poor water quality and large dosage. Therefore, it is necessary to comprehensively consider the cost and dosage when selecting the model to achieve an economical and reasonable selection.
3. Selection method of polyaluminum chloride.
1.Experimental validation.
In practical applications, the appropriate polyaluminium chloride model can be selected through trial verification. Through small and large tests of different types of polyaluminum chloride, the coagulation effect and precipitation performance are observed, so as to determine the most suitable model. At the same time, it is also necessary to consider factors such as the production process and product stability of polyaluminum chloride.
2.Refer to the success story.
You can refer to other successful treatment cases with similar water quality and process conditions to understand the type and specification of polyaluminum chloride selected, so as to provide reference for selection. At the same time, it is also necessary to pay attention to the selected polyaluminum chloride manufacturer and brand reputation to ensure product quality and after-sales service.