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Micro-electrolysis reaction device and method for pretreatment of waste water using it

A reaction device and micro-electrolysis technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Biochemical and toxicity reduction effects

Active Publication Date: 2016-01-20
NORTHERN ENG DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hot spot of chemical treatment is the in-depth study of advanced oxidation technology, but the cost of chemical treatment is relatively high

Method used

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  • Micro-electrolysis reaction device and method for pretreatment of waste water using it
  • Micro-electrolysis reaction device and method for pretreatment of waste water using it
  • Micro-electrolysis reaction device and method for pretreatment of waste water using it

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Depend on Figure 1-3 The shown micro-electrolysis reaction device can know that the present embodiment comprises reaction tank 4, the water distributor that is positioned at the bottom of reaction tank 4, the spiral baffle plate 5 that is positioned at the side wall of reaction tank filling area and circulation flushing pump 7; The top of the reaction tank 4 is provided with a feeding hole 1, and the side wall of the upper end of the reaction tank 4 is respectively provided with a waste water outlet 2 and a liquid level gauge 17, and a manhole 6 is provided on the side wall of the lower end of the reaction tank 4. A waste water inlet pipe 8 extending into the reaction tank is provided at the bottom of the reaction tank 4; the reaction tank 4 is a cylinder made of carbon steel, and its inner wall is subjected to anti-corrosion treatment. The diameter of the reaction tank is 600-4000mm, and the specifications and quantity of the reaction tank are configured according to ...

Embodiment 2

[0049] The method for carrying out pretreatment to containing nitrobenzene, p-nitroaniline waste water, this method utilizes the device described in embodiment 1 to carry out, and concrete steps are as follows:

[0050] (1) Carry out iron-carbon reduction reaction in the reaction tank:

[0051] a. Fill the supporting layer filler in the reaction tank:

[0052] The supporting layer filling adopts pebbles of φ8-φ32mm, and is filled in layers, with the pebbles with large diameters underneath, and the height of each layer is 100-300mm, and the height of the supporting layer filling is 100-200mm higher than the water distributor; the supporting Layer packing can also use other corrosion-resistant high-strength packing;

[0053] b. Fill the iron-carbon micro-electrolytic filler above the supporting layer filler:

[0054] The iron-carbon micro-electrolytic filler is spherical with a diameter of φ8-φ40mm, and its composition is: Fe=75%, C=24%, and the content of trace elements coppe...

Embodiment 3

[0068] What embodiment 3 and embodiment 4 are different from embodiment 2 is that the process parameter value in its each step is different, see attached table 1 for details:

[0069] Schedule 1

[0070]

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Abstract

The invention relates to a micro-electrolysis reaction device and a method for pretreating waste water by using the device. The device includes a reaction tank, a water distributor located at the bottom of the reaction tank, a spiral baffle on the upper side wall of the filling area of ​​the reaction tank and a circulation A flushing pump; a waste water inlet pipe extending into the reaction tank is provided at the bottom of the reaction tank. The steps of the method are as follows: (1) performing iron-carbon reduction reaction in a reaction tank; (2) performing alkaline reduction reaction in an alkaline reduction pool; (3) performing acidic oxidation reaction in an acidic oxidation pool (4) Flocculation and sedimentation. The advantages of the present invention are as follows: (1) The device will not have adverse conditions such as waste water drift, sludge silt, and packing failure, and maintains a high reaction rate; (2) The method can be based on nitrobenzene, p- The water quality and quantity of nitroaniline wastewater, flexible adjustment of process parameters, after pretreatment of wastewater, BOD5 / CODcr rose from 0.03 to above 0.20.

Description

technical field [0001] The invention relates to a micro-electrolysis reaction device and a method for pretreatment of waste water by using it, especially suitable for pretreatment of waste water containing nitrobenzene and p-nitroaniline, and also suitable for treatment of electroplating waste water and decolorization of dye waste water and pretreatment of high-concentration organic wastewater. Background technique [0002] The iron-carbon micro-electrolysis method uses electrochemical reactions to degrade refractory macromolecular organic matter and nitrobenzene organic matter into small molecules, improving the biodegradability of organic wastewater, and combining with other treatment methods to increase the removal rate of pollutants. Although the iron-carbon micro-electrolysis technology has been widely used in wastewater treatment, most of them use cast iron scraps as fillers, and sludge deposition, filler compaction, and short flow on the inner wall often occur during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F9/06
Inventor 孟宪礼李瑞杰张建磊李相龙王可付丽霞李洪瑞
Owner NORTHERN ENG DESIGN & RES INST CO LTD