Heavy metal wastewater treatment equipment
Product introduction: The cooling water of ironmaking, steelmaking, steel rolling and other processes are not very polluting; the washing water is the most polluting wastewater. For example, the wastewater for dust removal and flue gas purification often contains a large amount of wastewater. Suspended matter can only be recycled after being precipitated, but acidic wastewater and heavy
The cooling water of iron making, steel making, steel rolling and other processes are not very polluting; the washing water is the most polluting wastewater. For example, the wastewater for dust removal and purification of flue gas often contains a large amount of suspended matter. Recycling is required after precipitation, but acidic wastewater and water containing heavy metal ions are polluted. Heavy metals existing in various chemical states or chemical forms will remain, accumulate and migrate after entering the environment or ecosystem, causing harm. For example, even if the heavy metals discharged with the wastewater are small in concentration, they can accumulate in algae and sediments, be absorbed by the surface of fish and shellfish, and cause the food chain to condense, thereby causing pollution. Chemically, metals are divided into heavy metals and light metals according to their density.
Smelting wastewater treatment method:
The chemical precipitation method is a method for converting a heavy metal in a dissolved state into a heavy metal compound that is insoluble in water, and includes a neutralization precipitation method and a sulfide precipitation method.
The oldest, most effective and most classic heavy metal ion-containing smelting wastewater treatment process used in the non-ferrous smelting industry is the chemical precipitation method.
The chemical precipitation method has the following points: 1. Simple and inexpensive; 2. It can be processed in large quantities; 3. It is accurate to calculate the product by weight. The main precipitation agents used in engineering are hydroxides and sulfides.