Process for treating waste water of nitrobenzene, 2,4-dinitrophenol, p-nitro-chlorebenzene

A technology for p-nitrochlorobenzene and dinitrophenol, which is applied to containing nitrobenzene and 2, can solve the problems of low investment, simple process flow, low operating cost, etc., and achieves small footprint, shortened migration path, management handy effect

Active Publication Date: 2007-02-14
江苏环保产业股份有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Alkaline or neutral organic industrial wastewater with high chroma and refractory nitrobenzene, 2,4-dinitrophenol, p-nitrochlorobenzene, etc. has not yet had a simple process, low investment, and low operating costs. method

Method used

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  • Process for treating waste water of nitrobenzene, 2,4-dinitrophenol, p-nitro-chlorebenzene

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Embodiment Construction

[0015] attached by figure 1 It can be seen that the specific implementation method of the method of the present invention is as follows: the alkaline nitrobenzene production waste water in the water distribution tank 1 or the neutral waste water after the pH value is adjusted to 7-8 by 98% sulfuric acid is pumped into the activated carbon particle group electrocatalysis Device 2, the control of the influent flow rate is 200-1000l / h, the wastewater residence time is 20-60min, the device operating voltage is 20-50v, and the current is 10-30A. The pH value of pool 5 is adjusted with 98% sulfuric acid, and the tail water reaches the first-level standard in Table 4 of the National GB8978-1996 "Integrated Wastewater Discharge Standard".

[0016] For neutral wastewater, the intermediate tank 5 in the above flow chart can be omitted.

[0017] Table 1 and Table 2 are several specific embodiments and treatment results of using the method of the present invention to treat the alkaline o...

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Abstract

The invention is a method of processing the waste water containing nitrobenzene, 2, 4- dinitrophenol and para-nitrochlorobenzene, pumping the basic waste water in a water distributing tank or the neutral water produced by using 98% sulphuric acid to regulate the pH value up to 7-8, into an electro-catalyzing device with activated carbon particle group, the voltage and current of the device, staying for a short time and then making the outgoing water pass through a medium tank for buffering, adding in 98% sulphuric acid to regulate the pH value up to primary effluent standard in the list 4 of 'Sewage Synthetic Effluent Standard' of the national GB8978-1996 and discharging. It has characters of effective degrading the industrial waste water containing nondegradable basic or neutral organic pollutants like nitrobenzene, 2, 4- dinitrophenol, para-nitrochlorobenzene, etc.

Description

technical field [0001] The invention relates to a method for treating alkaline or neutral organic waste water such as nitrobenzene, 2,4-dinitrophenol, p-nitrochlorobenzene and the like, which are produced in the production process of nitrobenzene with high chroma and are refractory to degradation. Background technique [0002] At present, the treatment methods of wastewater containing nitrobenzene include micro-electrolysis-hydrolysis-aerobic process; iron-carbon reduction-facultative biochemical-aerobic biochemical process; Fenton reagent catalytic oxidation process, Fenton reagent and ultraviolet light-Fenton reagent combined process, etc. However, most of the above-mentioned processes are still in the laboratory research stage, and the effluent can only meet the discharge requirements of the second-level standard in the "Integrated Wastewater Discharge Standard" (GB8978-1996), and the technology is mature and applied to industrialization. [0003] For alkaline or neutral ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C02F9/06C02F9/02C02F1/46C02F1/66C02F1/28C02F1/44
Inventor 李国平王志良吴海锁张利民夏明芳熊孝华
Owner 江苏环保产业股份有限公司
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