How to buy high efficiency polyaluminium chloride?
2022-01-19
Poly Aluminum Chloride is a commonly used water purifier. Due to the low production technology threshold in the market, the quality of the product varies, how to buy PAC?First of all, we should understand our needs and usage methods, and then choose according to the product characteristics. We can buy the right water purifier.
The appearance can be divided into brown, khaki, yellow, light yellow and white. Brown polyaluminium chloride belongs to industrial grade and khaki colored polyaluminium chloride belongs to industrial and drinking water grade. Prices have gone up again. It should be noted that the color is only seen from the overall perspective, not from the packaging perspective.
Alkalinity is the basic component that causes changes in the morphology of polyaluminium chloride as OH radical ions. The measurement indicator of Oh ion in polyaluminium chloride is alkalinity, which is usually defined as the percentage of Oh and Al in polyaluminium chloride, usually 40-90%. Low alkalinity results in poor coagulation. It should be noted that the alkalinity is controlled at 50% for beverages and 80% for industrial polyaluminium chloride.
The water insoluble substance in PAC is also called solubility. The solubility of the product is generally greater than 99%, that is, the water insoluble matter is about 1%, and the solubility of the drinking grade is greater than 99.8%, that is, the insoluble matter is less than 0.2%. There are four production methods with different contents of polyaluminium chloride. The products are common industrial grade, plate and frame filter press, industrial grade plate and frame filter press, drinking water grade, and spray drying type.
The correct use of polyaluminium chloride directly affects its effectiveness. The accurate use of polyaluminium chloride usually depends on how and how much polyaluminium chloride is used. However, in actual application, the usage of polyaluminium chloride may also change depending on the site conditions. What should I pay attention to in the practical application?
In fact, commonly used polyaluminium chloride is used for melting equipment. The dissolved polyaluminium chloride is added to the wastewater through reaction addition equipment. The corresponding reaction tank, post-sedimentation equipment or dewatering equipment is usually set up during the reaction process. Only through the action of these equipments, the polymerization of aluminum chloride can obtain better application effect.
There are many kinds of dissolution equipment for polyaluminium chloride in practice, but generally it is dissolved directly with tap water and has corresponding stirring equipment to fully dissolve PVC aluminum chloride. The preparation of PVC aluminum chloride into a solution and adding it to it is actually a doser. The doser pumps an aqueous solution of PVC aluminum chloride into the effluent, and the reaction device is usually a flow-through device. The addition of the PVC aluminum chloride solution to the flowing effluent results in a well-mixed reaction at a slow flow rate. Then, the reaction solution is passed through the corresponding sedimentation equipment or filter press equipment to achieve water purification.
When using polyaluminium chloride, its own characteristics should be considered and suitable aluminium chloride products should be selected according to the sewage treatment situation, and then used according to the actual situation to achieve the desired effect.
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