Mining and smelting wastewater treatment
The heavy metal wastewater treatment device uses the electrochemical reaction in the electrolytic cell, and integrates electrolytic redox, electrolytic air flotation, and electrolytic flocculation. It has the advantages of low investment, easy installation and maintenance, small footprint, stable performance, and good treatment effects. Governance ideal equipment. For chromium, copper, zinc, nickel and other heavy metal ion wastewater, it can ensure that the discharge is up to standard. At the same time, it is also widely used in the treatment of leather, printing and dyeing, slaughtering, cyanide, hospital, emulsion and other wastewater treatment.
This technology has won three national patents: pulse electrolytic treatment device (MYS type), super-redox electrolytic treatment device (CYH type), and an electrochemical wastewater treatment device.
I. Structural composition and working principle:
Structure: It consists of electrolytic tank, inclined plate sedimentation tank, filter tank and electric control box.
氧气，阳极附近形成氢氧化铁，在弱酸和中性介质中继续还原六价铬，生成氢氧化合物沉淀，然后经过滤后排放，达到治理之目的。 Principle: Soluble iron is used as the anode. Under the action of direct current, the anode generates ferrous ions. Under acidic conditions, hexavalent chromium is reduced to trivalent chromium. When a certain voltage is reached between the plates, the cathode precipitates rich filter oxygen Iron hydroxide is formed near the anode, and hexavalent chromium is continuously reduced in a weak acid and neutral medium to form a hydroxide precipitate, which is then discharged after filtration to achieve the purpose of treatment.
For mixed heavy metal ion wastewater, the original ecological hydrogen ions, oxygen ions, and hydroxide ions are generated in the electrolytic cell, which have strong oxidation, reduction, and flocculation effects, so they can all be degraded, even if the water contains a small amount of organic matter, it can also be Ensure that the COD is discharged after treatment. Fully meet the first level standard of comprehensive sewage discharge standard (GB8978-1996).
Second, the governance process:
Process: (The device consists of three parts: electric control box, main machine and filter).
Features: 1, no need to add medicine, low operating cost (when the integrated ion concentration <100mg / L, the ton cost <0.25 yuan).
2. Multiple mixed ion wastewater can be treated at the same time (it can also be pre-recycled and then treated).
3. To ensure stable compliance with standards (much lower than national emission standards).
4, small footprint, easy to operate and maintain, the service life of more than ten years.
5. For large-flow wastewater, 10T / h unit combination is used in parallel, which is easy to interchange and easy to maintain.
Third, the main technical indicators:
Before treatment: PH = 4 ～ 6.5 (tempering first) After treatment: PH = 6 ～ 9
Cr + 6 ＜ 50mg / L Cr + 6 ＜ 0.5mg / L
Cu + 2 ＜ 30mg / L Cu + 2 ＜ 0.5mg / L
Zn + 2 ＜ 20mg / L Zn + 2 ＜ 2mg / L
Ni + 2 ＜ 120mg / L Ni + 2 ＜ 1mg / L
Mn + 2 ＜ 20mg / L Mn + 2 ＜ 2mg / L
Co + 2 ＜ 20mg / L Co + 2 ＜ 1mg / L
Fourth, equipment specifications:
Overall dimensions (length × width × height) mm
Power supply ~ 380V
1370 × 600 × 900
610 × 470 × 1210
2200 × 700 × 950
810 × 570 × 1510
2410 × 1000 × 1500
810 × 570 × 1610
3500 × 2500 × 1600
810 × 600 × 1800