With the development and improvement of industry, the quality of industrial waste water has changed greatly. There are also new problems in the treatment. There are common problems such as foaming of polyaluminum chloride in water, and blockage of pumps by pesticides.
The reasons for the foaming of polyaluminium chloride in water are mainly caused by the addition of polyaluminium chloride in water treatment. The main reason is that the temperature of these two seasons is low and easily lead to microfilament bacteria. Therefore, when adding polyaluminum chloride, there will be a phenomenon of foam, which will not happen in summer. Not the temperature difference.
First of all, we should consider whether there is a problem in the operation. Secondly, we should pay attention to the dilution ratio of polyaluminium chloride to water. Perhaps the problem is the proportion allocation.
At present, the dilution of polyaluminium chloride by conventional water treatment is fully dissolved with clean water (tap water), and the ratio of water to polyaluminium chloride is mostly converted into liquid in the ratio of 3:1. At this time, the concentration of the aqueous solution is relatively high, and then dilute it again according to the ratio of 1:10 on the basis of the aqueous solution, so that the pump blocking problem will not occur.
That is, the quality of the product itself, and the basicity and water-soluble matter are two indicators to measure the quality of polyaluminium chloride. If the main pump is blocked during polyaluminium chloride dosing, it may be that the product produced by the polyaluminium chloride product itself has low content, high water insoluble matter and salinity, and many impurities in the product itself, resulting in the problem of pump blocking. It is recommended to buy products with high content and high purity. In addition, it is also possible that the product moisture is too large and the products are agglomerated in the production process. It is suggested to slow down the dosing speed on the one hand. On the other hand, it is possible to speed up the mixing speed.