Supergravity enhanced extraction-catalysis o 3 / ti 4+ Method and device for treating high-concentration nitrobenzene wastewater
A nitrobenzene wastewater and supergravity technology, applied in the direction of extraction water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low ozone solubility, limited ozone application, and high treatment costs , to achieve the effects of simple process flow, reduced water treatment cost, and improved treatment efficiency
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Embodiment 1
[0030] Example 1: 1 L of nitrobenzene wastewater with a concentration of 1000 mg / L was treated by the extraction method. The configured nitrobenzene waste water and extractant cyclohexane were respectively placed in two storage tanks, compared to (V 环己烷 :V 废水 ) is 1:2, speed N=500r / min, waste water flow Q a =60L / h, pH=5, temperature T=25°C, and two liquids with an impact initial velocity of 9.45m / s to carry out a cross-flow extraction in an impinging flow-rotating packed bed. The results showed that the content of nitrobenzene in the wastewater (raffinate phase) was reduced to 62.49 mg / L, the removal rate of nitrobenzene reached 93.75%, and the extraction efficiency was 98.18%. Under similar experimental conditions, the extraction experiment was carried out in the impinging flow extractor. The removal rate of nitrobenzene was 81.68%, and the extraction stage efficiency was 83.33%, which were respectively reduced by 12.07% and 14.85% compared with the impinging flow-rotating ...
Embodiment 2
[0031] Example 2: 1 L of nitrobenzene wastewater with a concentration of 1500 mg / L was treated by the extraction method. The configured nitrobenzene waste water and extractant cyclohexane were respectively placed in two storage tanks, compared to (V 环己烷 :V 废水 ) is 1:1, speed N=400r / min, waste water flow Q a =50L / h, pH=7, temperature T=25℃, and two liquids with an impact velocity of 7.88 m / s for a cross-flow extraction in an impinging flow-rotating packed bed. The results showed that the content of nitrobenzene in the wastewater (raffinate phase) was reduced to 75.06mg / L, the removal rate of nitrobenzene reached 94.93%, and the extraction efficiency was 99.99%. Under similar experimental conditions, the extraction experiment was carried out in the impinging flow extractor. The removal rate of nitrobenzene was 80.88%, and the extraction efficiency was 82.03%, which were respectively reduced by 14.05% and 17.96% compared with the impinging flow-rotating packed bed. Using RPB-O...
Embodiment 3
[0032] Example 3: 1 L of nitrobenzene wastewater with a concentration of 2000 mg / L was treated by the extraction method. The configured nitrobenzene waste water and extractant cyclohexane were respectively placed in two storage tanks, compared to (V 环己烷 :V 废水 ) is 2:1, speed N=300r / min, waste water flow Q a = 40L / h, pH = 9, temperature T = 25°C, and the two liquids collided at an initial velocity of 6.3m / s to perform a cross-flow extraction in an impinging flow-rotating packed bed. The results showed that the content of nitrobenzene in the wastewater (raffinate phase) was reduced to 125.85 mg / L, the removal rate of nitrobenzene reached 93.71%, and the extraction efficiency was 98.68%. Under similar experimental conditions, the extraction experiment was carried out in the impinging flow extractor. The removal rate of nitrobenzene was 79.43%, and the extraction efficiency was 81.56%, which were respectively reduced by 14.28% and 17.12% compared with the impinging flow-rotating...
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