Reaction device and method for integrated enhanced iron-carbon micro-electrolysis-ozone coupling treatment of nitrobenzene wastewater

A technology of nitrobenzene wastewater and iron-carbon strengthening, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problem of iron-carbon micro-electrolysis efficiency reduction, low utilization rate, and passivation of fillers Inactivation and other problems, to achieve the effect of reducing the amount of ozone and high utilization

Inactive Publication Date: 2022-04-22
ZHONGBEI UNIV
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  • Abstract
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Problems solved by technology

[0020] This article provides an integrated reaction device and method for strengthening iron-carbon micro-electrolysis-ozone coupling treatment of nitrobenzene wastewater, so as to improve the passivation and deactivation of fillers after long-term operation of the iron-carbon micro-electrolysis bed in the prior art, and the electrolytic reaction is hindered. The reduction of carbon micro-electrolysis efficiency, limited ozone oxidation capacity and low utilization rate simplifies the process procedure and saves the cost of wastewater treatment. At the same time, the integrated reaction device can effectively avoid Fe 2+ waste of

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  • Reaction device and method for integrated enhanced iron-carbon micro-electrolysis-ozone coupling treatment of nitrobenzene wastewater
  • Reaction device and method for integrated enhanced iron-carbon micro-electrolysis-ozone coupling treatment of nitrobenzene wastewater

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Embodiment 1

[0042] This embodiment provides an integrated reaction device for strengthening iron-carbon micro-electrolysis-ozone coupling treatment of nitrobenzene wastewater, including an oxygen cylinder 1, an ozone generator 2, a rotating packed bed 6, a centrifugal pump 9, and a nitrobenzene wastewater storage solution Groove 10, rotating packing bed 6 is provided with an annular rotor 7; the rotor 7 is provided with a rotor shell 7.1, an annular partition 7.2 and a rotor inner shell 7.3 in turn from the outside to the inside, the rotor shell 7.1, the annular partition 7.2 and the rotor The inner casing 7.3 is provided with through holes, and the wire mesh 7.4 made of metal wire coils is filled between the rotor outer casing 7.1 and the annular partition 7.2 to form an oxidation zone; the annular partition 7.2 and the rotor inner casing 7.3 are stacked with Iron carbon balls 7.5 form a reduction zone; the gap between the rotor shell 7.1 and the rotating packed bed shell is filled with l...

Embodiment 2

[0053] The present embodiment provides a method for strengthening iron-carbon micro-electrolysis-catalytic ozonation to treat nitrobenzene wastewater, comprising the following steps:

[0054] A method for strengthening iron-carbon micro-electrolysis-ozone coupling treatment of nitrobenzene wastewater is provided, comprising the steps of:

[0055] Put the nitrobenzene wastewater into the rotary packing bed 6 in the above reaction device, so that the refractory nitrobenzene is reduced to easily degradable aniline through the electrolysis of iron-carbon micro-electrolysis in a high-gravity environment, and at the same time, after the electrolysis reaction A lot of Fe 2+ Released into wastewater; wastewater carries Fe 2+ Throw it into the wire mesh 7.4 in the rotor 7, contact with the ozone cross-flow, fully react, deeply oxidize and degrade the organic matter in the waste water.

[0056] The specific process is: the centrifugal pump 9 drives the nitrobenzene waste water in the ...

Embodiment 3

[0070] use figure 1 The device shown treats nitrobenzene wastewater. The initial concentration of nitro compounds in the wastewater was 200 mg / L, and the pH value was 1. The volume of iron-carbon balls 7.5 in the reduction zone is 400 mL, the ratio of iron-carbon content is 5:1, the rotation speed of the frequency conversion motor 8 of the rotating packed bed 6 is 800 rpm, and the gas flow meter 3 is adjusted so that the liquid-gas ratio of wastewater to ozone is 1.5 L / L, the ozone concentration is 30 mg / L. The nitrobenzene wastewater of 2 L was placed in the nitrobenzene wastewater storage tank 10, and was circulated in the rotary packed bed 6 with a flow rate of 80 L / h by the centrifugal pump 9 for 60 min, and the removal rate of nitrobenzene was 100%. %, the mineralization rate is 80%.

[0071] Instead of using high-gravity technology, the micro-electrolysis-high-gravity-catalytic ozonation method is directly used to treat wastewater. When the treatment capacity remains...

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Abstract

The invention provides an integrated reaction device and method for treating nitrobenzene wastewater through reinforced iron-carbon micro-electrolysis-ozone coupling, the device comprises an oxygen bottle, an ozone generator, a rotating packed bed, a pump and a nitrobenzene wastewater storage tank, and an annular rotor is rotationally arranged in the rotating packed bed; the rotor is sequentially provided with a rotor outer shell, an annular partition plate and a rotor inner shell from outside to inside, through holes are formed in the rotor outer shell, the annular partition plate and the rotor inner shell, the space between the rotor outer shell and the annular partition plate is filled with a metal wire mesh formed by winding metal wires, and iron carbon balls are stacked between the annular partition plate and the rotor inner shell. The rotating packed bed is provided with a gas inlet, a gas outlet, a liquid inlet and a liquid outlet; the nitrobenzene wastewater storage tank is connected with a pump; the pump is connected with a liquid inlet of the rotating packed bed; the oxygen bottle is connected with the ozone generator; the ozone generator is connected with a gas inlet of the rotating packed bed. According to the invention, the process procedure is simplified, the wastewater treatment cost is saved, and the waste of Fe < 2 + > can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of nitrobenzene wastewater treatment, and specifically discloses an integrated reaction device and method for strengthening iron-carbon micro-electrolysis-ozone coupling treatment of nitrobenzene wastewater. Background technique [0002] The iron-carbon micro-electrolysis technology uses waste iron scraps and activated carbon particles as the filler of the reactor, and uses the difference in redox potential of iron and carbon to form countless tiny primary batteries in the reactor to reduce and degrade organic pollution in wastewater things. The reaction formula is as follows: [0003] anode: [0004] Fe-2e - → Fe 2+ E(Fe / Fe 2+ )=0.44V (Formula 1) [0005] cathode: [0006] 2H + +2e - →2[H] →H 2 E(H + / H 2 )=0.00V (acid) (Formula 2) [0007] Cathodic reaction under aeration conditions: [0008] o 2 + 4H + + 4e – → 2H 2 O E (O 2 / H 2 O) = +1.23V (acid) (Equation 3) [0009] o 2 + ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/38
CPCC02F1/461C02F1/725C02F1/78C02F2101/38C02F2201/002
Inventor 焦纬洲刘有智景佳鑫苗富铭祁贵生袁志国张巧玲
Owner ZHONGBEI UNIV
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