A kind of preparation method of heavy metal sewage treatment agent

Abstract

The invention provides a preparation method of a heavy metal sewage treatment medicament. The preparation method comprises the following steps: preparing raw materials including barium sulfide, ferric sulfate, polymeric silicate aluminum sulfate, calcium hydroxide and lithopone; adding barium sulfide, ferric sulfate and polymeric silicate aluminum sulfate into a reactor; stirring and heating to 120 DEG C, and carrying out backflow for 6-9 hours while maintaining the reaction temperature at 110-130 DEG C; adding water to dilute calcium hydroxide, and adequately stirring the solution with dried jelly; carrying out boiling reaction at 100 DEG C, so as to prepare a mother solution; filtering the mother solution after the reaction to obtain filtrate for later use, and recycling filter residues; cooling the mother solution at the room temperature, adding lithopone into the reactor, uniformly stirring until initial condensation; heating at 60-80 DEG C for 1-3 hours, stirring for 15 minutes, and using at 5-50 DEG C. The heavy metal sewage treatment medicament is wide in application range, good in sedimentation effect, water purification quality, dehydration property, compression property and effluent quality and low in treatment cost and can serve as a dehydration flocculant.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a preparation method of 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 formulations are more and more widely used. Phosphorus-free green Water treatment agents ...

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.