How to judge the quality of polyaluminium chloride from indicators?
2021-11-25
In the rapid development of science and technology today, the country has certain index requirements for each product testing. In the process of testing some substances, there are corresponding index judgment criteria. I believe everyone knows how much process is needed behind the definition of index. Polyaluminium chloride also has corresponding judgment criteria in the process of sampling and testing.
It is very important to determine whether the quality of polymeric aluminum chloride is reliable or not. Today, several main indicators of polymeric aluminum chloride PAC chemistry will be presented:
1. Alkalinity: Alkalinity of polymeric aluminum chloride is a relatively important indicator in polymeric aluminum, especially for the drinking water level of polymeric aluminum products. This standard is one of the important indicators to control the production line of polymeric aluminum. The lower the alkalinity, the higher the price. All purchasers can operate according to the actual situation of the plant. In addition, different raw materials and processes produce and treat different alkalinity of the polyaluminum chloride product, which needs to be adjusted by the manufacturer. Increasing the alkalinity of polyaluminium chloride products can greatly improve the economics of production and use. Raising the alkalinity from 65% to 92% reduces the cost of raw materials by 20% and the cost of use by 40%.
2. Water insoluble matter: The presence of water insoluble matter will affect the overall use effect of polyaluminium chloride. In general, its percentage should not exceed 0.1%. Otherwise, the natural precipitation method cannot achieve good treatment effect. The data are as follows.
3. Alumina: As an important raw material for the production of polyaluminium chloride, its component content largely determines the purification capacity of polyaluminium chloride reagent. Its presence is mainly to achieve two effects of coagulation and flocculation, which cannot be achieved by other drying methods.
Polyaluminium chloride can treat all kinds of domestic and industrial wastewater with good treatment effect. It needs to be reasonably selected according to the actual amount of water to be treated. Users need to know how to use the polymeric aluminum chloride products and how to choose the polymeric aluminum chloride.
When using polyaluminium chloride, it is necessary to conduct a new small test on polyaluminium chloride, and calculate the usage and dosage of polyaluminium chloride according to the number of small tests. Put the polyaluminium chloride into the dosing tank. When adding polyaluminium chloride at the actual production site, 5 parts of tap water need to be added to dissolve it completely, and then dilute it with water. The concentration of polyaluminium chloride solution is generally around 5%. When dissolving polyaluminium chloride, metal dosing tanks such as iron cannot be used, which will lead to the deterioration of the polyaluminium chloride product.
The three main indicators of polyaluminium chloride are alumina content, alkalinity and water insolubility. The effective water purification component of polyaluminium chloride is alumina. The higher the content of polyaluminium chloride, the better the purification effect and the higher the price. The higher the content of alumina trioxide in polyaluminium chloride, the less impurities and the less water insoluble content, which is the reason for the higher content of polyaluminium chloride.
The alkalinity of polyaluminium chloride is an important indicator and controllable factor in the production of polyaluminium chloride. Since the alkalinity of polyaluminium chloride also affects the flocculation effect, most professional polyaluminium chloride manufacturers can produce polyaluminium chloride products with high alkalinity according to the needs of users.
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