New technology for treatment of wastewater with high salinity and cod

Description of a new technology for the treatment of wastewater with high salinity and cod: Wuhan Huake Tianyuan Environmental Protection Technology Co., Ltd has met the complicated problems of high salt, high COD and high calcium content in the wastewater treatment of various chemicals, nonferrous smelting, garbage percolate, etc after years of research and practice, the unit has mastered the solutions of relevant technologies, and now provides the sharing of practical technologies for such wastewater treatment Experts with the same opinions and different opinions are welcome to exchange and correct Zhao Gong's scope of application: cod ≥ 30000mg / L, total salt ≥ 50000mg / L, pH ≤ 1 h ₂ so ₃ ≥ 1% and total hardness ≥ 1000mg / L generally, the above indicators will not appear at the same time, and the process combination can be adjusted according to different situations to achieve better results Process flow: wastewater ↓ CaCO ₃ neutralization ↓ solid-liquid separation → industrial calcium sulfate products ↓ caoh reaction ↓ solid-liquid separation → solid waste ↓ co 12 softening ↓ solid-liquid separation → industrial CaCO ₃ finished products ↓ cod extraction → dense liquid mixed coal incineration ↓ chemical pretreatment ↓ mvr-t facilities → industrial salt ↓ Reuse ← biochemical ↓ discharge up to the standard 4 Process Description: similar wastewater will be transformed into CaSO ₄ precipitate by CaCO ₃ neutralization reaction, and useful component calcium sulfate will be extracted by solid-liquid separation The next step is to further react with Ca (OH) Е to neutralize h ₃ so ₃ Neutralization process and wastewater itself contain a lot of hardness, Hardness will have an adverse effect on all subsequent processes Therefore, the wastewater after neutralization reaction needs to be softened by CO 2 softening method to ensure that no new ions are brought into the wastewater After softening, COD extraction technology is applied to the wastewater, which will affect the temperature rise and evaporation efficiency After cod substances are extracted and concentrated, they are mixed with coal for incineration The raffinate enters mvr-t evaporator to crystallize industrial salt, and the condensate enters other water points for reuse or is discharged after biochemical treatment reaches the standard 5 According to the practical application of Wuhan Huake Tianyuan company, the process has strong adaptability and practicability, and the operation cost is generally less than 50 yuan / ton, which is of great significance for such wastewater treatment If you have any questions, Zhao Gong research unit: Wuhan Huake Tianyuan Environmental Protection Technology Co., Ltd