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Pretreatment device for removing nitrobenzene in waste water by potassium ferrate and method

A pretreatment device and technology of potassium ferrate, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of difficult biological domestication, high treatment cost, poor treatment effect, etc problems, to achieve the effect of shortening the reaction time, increasing the degree of agitation, and improving the reaction efficiency

Inactive Publication Date: 2009-11-11
DONGHUA UNIV
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a pretreatment method for potassium ferrate to remove nitrobenzene in wastewater, which solves the shortcomings of existing nitrobenzene wastewater treatment technology, such as difficulty in biological domestication, long cycle, high treatment cost, and poor treatment effect. Processing device and method

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  • Pretreatment device for removing nitrobenzene in waste water by potassium ferrate and method
  • Pretreatment device for removing nitrobenzene in waste water by potassium ferrate and method
  • Pretreatment device for removing nitrobenzene in waste water by potassium ferrate and method

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[0027] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0028] Such as figure 1 As shown, the nitrobenzene-containing wastewater to be treated is sucked by the lift pump 2 through the water inlet pipe 1 and injected into the tubular mixer, and injected into the tubular mixer by the metering pump 5 through the feed pipe 4 in the tubular mixer Potassium ferrate in the mixture is mixed thoroughly. Flow through the connecting pipe 8, enter the coagulation reaction zone 13, pass throug...

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Abstract

The invention relates to a pretreatment device for removing nitrobenzene in waste water by potassium ferrate and a method. By adopting the device, the waste water containing nitrobenzene is mixed fully with potassium ferrate by a tube-type mixer, and then the mixture passes through a one-piece device for coagulation and precipitation to carry out degradation to the nitrobenzene in the waste water by the synergy of oxidization, coagulation, absorption and the like of potassium ferrate, wherein part of nitrobenzene is removed, and the rest part thereof can be converted into a series of aliphatic hydrocarbon, which can be further degraded completely by the subsequent biological treatment of waste water. The invention solves problem of secondary pollution commonly existing in the conventional nitrobenzene waste water treatment process; a gridding frame plate is added in the coagulating area so as to increase the stirring strength to waste water, strengthen the mass transferring action of substances in waste water, shorten the reaction time, and improve reaction efficiency; and a transitional area is added between the coagulating area and a precipitating area and a gridding-shaped clapboard is additionally arranged so as to improve the precipitating effect.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a pretreatment device and method for removing nitrobenzene in wastewater by potassium ferrate. Background technique [0002] Nitrobenzene is an important raw material for the industrial preparation of aniline and aniline derivatives. It is widely used in the production of rubber, pesticides, dyes and drugs. Because it is a highly toxic organic substance, it is listed as a priority environmental pollution One of the substances, according to GB3838-2002, the upper limit of the discharge of nitrobenzene from surface water sources is 0.017mg / L. At present, the methods used in the treatment of nitrobenzene wastewater are mainly biological methods and physical and chemical methods. [0003] Biological treatment of nitrobenzene wastewater, because nitrobenzene is a refractory organic pollutant and has a high toxicity to microorganisms, the conventional biologic...

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Application Information

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IPC IPC(8): C02F1/72C02F1/52C02F101/38
Inventor 薛罡刘亚男龚清杰高品杨林
Owner DONGHUA UNIV
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