1. Neutralization precipitation tower, generally referred to as neutralization reaction precipitator, first-stage neutralization reaction, and second-stage precipitation to separate alkali metal hydrocyanide. Such as wastewater containing copper, is neutralized by adding alkali, and then copper hydroxide is precipitated and separated.
2. The oxidation precipitation tower generally refers to the equipment that oxidizes pollutants in water into products with low solubility by oxygen or adding oxidant, and then carries out precipitation separation. Similarly, oxidation and precipitation should be separated. For example, wastewater containing sulfur can be oxidized by air, resulting in elemental precipitation of sulfur.
3. Timely filter tower (I don't know if this is a limestone filter tower). Timely filter, usually called quartz sand filter, intercepts suspended solids in water. Limestone filter tower generally treats wastewater with high acid concentration. Dolomite can also be used instead of limestone.
Is there anything you don't understand?