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High efficiency hardening resistant micro-electrolysis material and preparation method thereof

A micro-electrolysis and anti-hardening technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc., can solve problems such as easy hardening, unstable treatment effect, etc., and achieve long service life and significant social benefits and economic benefits, the effect of reducing pollutant emissions

Active Publication Date: 2011-07-20
EC PRECISION TECHJIANGSUCORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of existing traditional micro-electrolytic materials such as easy hardening and unstable treatment effect, and provide a high-efficiency, anti-hardening micro-electrolytic material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 30g of iron powder, 30g of activated carbon powder, 40g of sodium bentonite, NH 4 Cl 0.5g, mix thoroughly and add water and mix thoroughly. The above-mentioned mixed materials are made into small balls with a diameter of 2-5mm by a ball forming machine, put into an oven for drying, then put into a reduction furnace, and bake at 400°C for 10 minutes. Then heat up to 1150°C and bake for 15 minutes, then naturally cool to room temperature to obtain the product. The initial COD (chemical oxygen demand) concentration of this product is 6000mg L -1 The laboratory self-dispensing water (the sewage substance is N,N-dimethylformamide), under the condition that the empty tower residence time is 2 hours, the removal rate reaches more than 60%, and the material has no hardening after continuous operation for 2 months.

Embodiment 2

[0022] Weigh 60g of iron powder, 60g of activated carbon powder, 80g of sodium bentonite, NH 4 Cl 1.0g, mix thoroughly and add water and mix thoroughly. The above-mentioned mixed materials are made into small balls with a diameter of 2-5mm by a ball forming machine, put into an oven for drying, then put into a reduction furnace, and bake at 400°C for 10 minutes. Then heat up to 1150°C and bake for 15 minutes, then naturally cool to room temperature to obtain the product. The initial COD concentration of this product is 6000mg L -1 The laboratory self-dispensing water (the sewage substance is N,N-dimethylformamide), under the condition that the empty tower residence time is 1.5 hours, the removal rate reaches more than 50%, and the material has no hardening after 4 months of continuous operation.

Embodiment 3

[0024] Weigh 60g of iron powder, 60g of activated carbon powder, 80g of sodium bentonite, NH 4 Cl 1.0g, mix thoroughly and add water and mix thoroughly. The above-mentioned mixed materials are made into small balls with a diameter of 2-5mm by a ball forming machine, put into an oven for drying, then put into a reduction furnace, and bake at 400°C for 10 minutes. Then heat up to 1150°C and bake for 15 minutes, then naturally cool to room temperature to obtain the product. The initial COD concentration of this product is 3500mg L -1 Under the condition that the empty tower residence time is 2 hours, the removal rate of pharmaceutical wastewater reaches more than 50%, and the material has no hardening after continuous operation for 2 months.

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Abstract

The invention discloses a high efficiency hardening resistant micro-electrolysis material. The porosity is 0.5 to 0.8 and the specific surface area is 0.4 to 1.0m2 / g. The preparation method is that at first ferrous powder, active carbon powder, sodium bentonite and NH 4Cl are mixed fully, water is added and stirred evenly, in the second place, small balls the diameter of which is 2 to 5mm are made through a ball forming mill and then dried and finally the dried spherical material is roasted and cooled to room temperature naturally. Compared with the traditional micro-electrolysis material, the invention has the advantages that NH3 generated by NH4Cl at high temperature is used to create pores, the porosity and the specific surface area of material are increased, the elimination effect of the micro-electrolysis material on pollutant in waste water is improved, meanwhile because the material is spherical regular material, the invention has good mechanical strength, the compaction of thematerial in the use process is avoided, the material does not tend to be hardened and passivated, the service life is long and consequently the long-term stable running of the micro-electrolysis technology is ensured.

Description

technical field [0001] The invention relates to a material and a preparation method thereof, more specifically, to a high-efficiency, compaction-resistant micro-electrolytic material and a preparation method thereof. Background technique [0002] Industrial wastewater has the characteristics of high pollutant concentration, high toxicity, and poor biodegradability, which poses a serious threat to the ecological environment. Micro-electrolysis technology has become an important technology for industrial wastewater pollution control due to its good treatment effect, simple raw materials, and wide range of sources. [0003] Micro-electrolysis technology, also known as internal electrolysis or iron-carbon method, is one of the electrochemical sewage treatment technologies. In the micro-electrolysis technology, the micro-electrolysis material is the core part of the technology. The selection and preparation of the micro-electrolysis material has a key influence on the removal ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/28
Inventor 季民王灿周璇
Owner EC PRECISION TECHJIANGSUCORP
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