Heavy metal-containing wastewater treatment chemical

Abstract

The invention relates to a heavy metal-containing wastewater treatment chemical. The wastewater treatment chemical is prepared by mixing barium sulfide, ferric sulfate, poly-silicon aluminum sulfate and a few calcium hydroxide and lithopone, wherein barium sulfide accounts for 30-40 parts by weight, ferric sulfate accounts for 20-30 parts by weight, poly-silicon aluminum sulfate accounts for 20-40 parts by weight, calcium hydroxide accounts for 5 parts by weight and lithopone accounts for 5 parts by weight. The chemical has a wide range of application and has high universality. The wastewater treatment chemical has a good effect of treating industrial wastewater of metallurgy, heavy metal, mine, printing and dyeing, spinning, building, casting, chemical, electric power, leather and papermaking, etc. as well as municipal composite wastewater. The chemical has a wide range of pH for water and has purifying effects at pH 4-10. The chemical has good sedimentation efficiency and good water purification quality and is non-corrosive. The pH value of a solution treated by the use of the chemical is 6.5-8.5 and is close to neutral. The solution contains no chloride ion. A steel structure in a water system can effectively be protected during recycling so as to protect the steel structure from being corroded. Thus, a large amount of equipment maintenance cost can be minimized annually.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a water treatment agent for treating heavy metal sewage. Background technique [0002] Sewage treatment technology plays a very important role in water saving, energy saving and other issues, but at the same time, the use of sewage treatment chemicals also has a certain impact on the environment. In the cooling water system, in various occasions where the water temperature is higher than the ambient temperature, the scaling of calcium carbonate and other inorganic salts will bring serious consequences. In recent years, in the field of water treatment, the application of alkaline water treatment technology that does not adjust the pH value is increasing. Among them, the addition of corrosion and scale inhibitors, low-phosphorus and phosphorus-free formulas are more and more widely used. Phosphorus-free green Water treatment agents have become a hot topic in th...

AI Technical Summary

Problems solved by technology

[0019] The existing water treatment technology has treated harmful substances such as heavy metals in industrial wastewater, but it cannot achieve a good removal effect on harmful substances other than heavy metals in wastewater, especially when dealing with industrial circulating water. matter of matter

The chemicals used in the existing wastewater treatment still have problems such as poor treatment effect, slow settling speed, high cost, and serious corrosion of equipment.