Treatment method and treatment system for nitrochlorobenzene production waste water
A technology for producing wastewater and nitrochlorobenzene, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. , high operating costs, to achieve the effect of easy operation, no secondary pollution, low operating costs
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Embodiment 1
[0027] Take 200ml of nitrochlorobenzene production wastewater, then add sodium hydroxide and hydrochloric acid to adjust the pH to 1~3, and react for 5~10min. In the case of a stirring speed of 55r / min, sodium hypochlorite was added to the acidic wastewater and reacted for 10-30 minutes. After the reaction is complete, add sodium hydroxide to adjust the pH to neutral, then add polyaluminum chloride solution, react for 20-30 minutes at a stirring speed of 80 r / min, and then let stand for 30-50 minutes. The supernatant is effluent, and the chromaticity, COD and nitrobenzene compounds of the supernatant are detected by HJ 592-2010 "Determination of Nitrobenzene Compounds by Gas Chromatography", which meets the requirements of GB8979-1996 "Comprehensive Wastewater Discharge Standard". primary standard.
Embodiment 2
[0029] Adopt the waste water treatment system of the present invention, 50m 3 / d of nitrochlorobenzene wastewater treatment for 8 hours, continuous operation, the hourly treatment capacity is 6.25m 3 . See above for the treatment process, and the process parameters are as follows: In the adjustment tank, use a sodium hydroxide solution with a mass concentration of 1mol / L and a hydrochloric acid solution with a mass concentration of 1mol / L to adjust the pH to 2, and the wastewater stays for 10 minutes; the stirring speed of the mixer in the oxidation tank is maintained at 55r / min, the mass concentration of oxidant sodium hypochlorite solution is 8%, and the dosage of sodium hypochlorite solution is 30L / m 3 , the wastewater stays for 20 minutes; in the neutralization tank, the speed of the mixer is maintained at 60r / min, and the pH of the oxidized wastewater is adjusted to be neutral by using a sodium hydroxide solution with a mass concentration of 1mol / L, and the wastewater st...
Embodiment 3
[0031] Adopt the waste water treatment system of the present invention, 50m3 / d of nitrochlorobenzene wastewater treatment for 8 hours, continuous operation, the hourly treatment capacity is 6.25m 3 . See above for the treatment process, and the specific process parameters are: in the adjustment tank, use a sodium hydroxide solution with a mass concentration of 1mol / L and a hydrochloric acid solution with a mass concentration of 1mol / L to adjust the pH to 1, and the wastewater stays for 5 minutes; the stirring speed of the mixer in the oxidation tank is maintained at 50r / min, the mass concentration of oxidant calcium hypochlorite solution is 10%, and the dosage of calcium hypochlorite solution is 20L / m 3 , the wastewater stays for 10 minutes; in the neutralization tank, the speed of the mixer is maintained at 65r / min, and the pH of the oxidized wastewater is adjusted to be neutral by using a sodium hydroxide solution with a mass concentration of 1mol / L, and the wastewater stay...
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