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Catalytic microelectrolysis packing, as well as preparation method and application thereof

A technology of micro-electrolysis and spherical fillers, which is applied in chemical instruments and methods, water/sewage treatment equipment, textile industry wastewater treatment, etc., can solve the problems of reduced treatment effect, increased difficulty of replacing micro-electrolytic fillers, and decreased treatment efficiency. Achieve the effect of improving pollutant removal rate and wastewater COD removal rate, good catalytic reaction effect, and improving biodegradability

Inactive Publication Date: 2016-06-08
NORTHERN ENG DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since most of the micro-electrolytic fillers are made of cast iron chips, the surface of the cast iron chips is jagged, and the iron and carbon electrodes are easy to form an isolation layer, which causes the electrodes to separate and reduces the processing efficiency. flow or sludge accumulation
After the packing bed runs for a period of time, the suspended particles of the wastewater will partially deposit on the surface of the micro-electrolysis filler, which blocks the effective contact between the micro-electrolysis filler and the wastewater, resulting in a reduction in the treatment effect of the micro-electrolysis filler or even failure.
Long-term sludge accumulation will cause compaction of the micro-electrolysis filler, which will not only lead to the deterioration of the wastewater flow state inside the micro-electrolysis filler and reduce the treatment effect, but also greatly increase the difficulty of replacing the micro-electrolysis filler

Method used

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  • Catalytic microelectrolysis packing, as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0035] Two, the preparation method of described each embodiment:

[0036] The preparation can be completed by operating according to the second technical scheme, and it should be noted that:

[0037] 1. The melting temperature of each embodiment can be selected from 1300-1600°C.

[0038] 1. The principle of selecting a spherical mold with an inner cavity is to select the mold corresponding to the diameter of the spherical filler in each embodiment.

[0039] 3. Examples of the application of catalytic micro-electrolytic fillers in wastewater treatment:

Embodiment 10

[0040] Embodiment 10 (using the micro-electrolysis filler described in Embodiment 5 for the treatment of antibiotic waste water):

[0041] Put the catalytic micro-electrolysis filler described in Example 5 into the swirl micro-electrolysis reactor with the patent number ZL201420467908.9, and introduce the wastewater from the antibiotic secondary sedimentation tank into the swirl micro-electrolysis reactor. The quality of the wastewater: COD=550mg ∕L, pH=3, BOD5∕COD=0.09, the wastewater undergoes an electrochemical reaction through the catalytic micro-electrolysis filler, the reaction time is 1h, the pH value of the effluent is adjusted to 9-10, the precipitation is 30mm, the supernatant is discharged, and the detection. The COD of the effluent is 226mg / L, BOD5 / COD=0.59, which significantly improves the biodegradability of the wastewater. After 120 days of continuous reaction, the catalytic micro-electrolysis filler has no hardening phenomenon.

Embodiment 11

[0042] Example 11 (using the micro-electrolytic filler described in Example 2 to treat heavy metal wastewater):

[0043] The catalytic micro-electrolysis filler described in Example 2 is loaded into the swirl micro-electrolysis reactor whose patent number is ZL201420467908.9, and heavy metal wastewater is introduced into the swirl micro-electrolysis reactor. The waste water quality Cr +6 =20mg / L, total chromium is 35mg / L, Zn 2+ =97mg / L, Cu 2+ =285mg / L, the reaction time is 60min, the effluent is added with alkali to adjust the pH value to 8-9, and the effluent is left to settle for 30min, and the supernatant is discharged for detection. After 120 days of continuous reaction, the catalytic micro-electrolysis filler has no hardening phenomenon, and the average value of the effluent Cr +6 =0.03mg / L, total chromium is 0.04mg / L, Zn 2+ =0.12mg / L, Cu 2+ =0.67mg∕L, which meets the requirements of GB21900-2008 of Discharge Standard for Electroplating Wastewater.

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Abstract

The invention relates to catalytic microelectrolysis packing for treatment of pharmaceutical wastewater, heavy metal wastewater, printing and dyeing wastewater and the like. The catalytic microelectrolysis packing is spherical packing prepared from the following components in parts by weight: 90-95 parts of cast-iron scrap, 0-10 parts of aluminum and 0-5 parts of copper by means of weighing, mixing, melting and molding, wherein any one or both of aluminum and copper exist; the diameter of the spherical packing is 5-10mm; and the carbon content of the cast-iron scrap is 3-4 percent. The packing has the beneficial effects of overcoming inherent defects of easily caking, deflection and blockage of traditional microelectrolysis packing prepared from cast-iron scrap and improving the pollutant removal rate and wastewater COD removal rate, so that the biodegradability of wastewater can be improved.

Description

technical field [0001] The invention relates to a catalytic micro-electrolysis filler, which belongs to the technical field of waste water treatment and is suitable for the treatment of pharmaceutical waste water, heavy metal waste water, printing and dyeing waste water and the like. Background technique [0002] Micro-electrolysis of iron filings uses electrochemical reactions to degrade refractory macromolecules, aromatic nitro compounds, diazo compounds, and high-valence metal ions into small molecules or low-valence metal ions, thereby improving the removal rate of pollutants. This method has the advantages of wide application range, low cost, strong engineering operability, good treatment effect, low-carbon environmental protection, etc. It is often used in actual engineering projects and belongs to an economical and practical wastewater treatment technology. However, since most of the micro-electrolytic fillers are made of cast iron chips, the surface of the cast iron ...

Claims

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Application Information

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IPC IPC(8): C02F1/461
CPCC02F1/46104C02F2101/20C02F2103/026C02F2103/30C02F2103/343C02F2201/46105
Inventor 李瑞杰李德喜付丽霞李相龙张建磊李洪瑞牛翠玉
Owner NORTHERN ENG DESIGN & RES INST CO LTD
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