Micro-electrolysis filler for treatment of hardly degraded waste water and preparation method of micro-electrolysis filler

A wastewater treatment and micro-electrolysis technology, which is applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as heavy workload, micro-electrolysis failure, and waste water for a long time. High porosity and specific surface area, improve the biodegradability of wastewater, and reduce the effect of wastewater COD

Inactive Publication Date: 2016-08-17
SHENYANG ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Traditional micro-electrolytic fillers are often a simple mixture of iron filings and coke powder (or charcoal, corundum graphite particles and other carbon-containing substances), which are physically mixed in a certain proportion in the box, or made into fillers after pressing and low-temperature sintering. Adding acid and alkali to activate, it is easy to passivate and harden during use, and because iron and carbon are in physical contact, it is easy to form an isolation layer between them, so that the micro-electrolysis cannot continue and lose its function, which leads to frequent replacement of micro-electrolysis materials , not only the workload is high and the cost is high, but also affects the treatment effect and efficiency of wastewater
In addition, the small surface area of ​​traditional micro-electrolysis materials also makes wastewater treatment take a long time, increasing the investment cost per ton of water, which seriously affects the utilization and promotion of micro-electrolysis processes

Method used

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  • Micro-electrolysis filler for treatment of hardly degraded waste water and preparation method of micro-electrolysis filler
  • Micro-electrolysis filler for treatment of hardly degraded waste water and preparation method of micro-electrolysis filler

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preparation example Construction

[0023] Such as figure 1 As shown, a method for preparing micro-electrolytic fillers for refractory wastewater treatment provided by the embodiments of the present invention comprises the following steps:

[0024] Step 101 mixing materials: mixing iron filings, activated carbon powder, clay, sodium carboxymethyl cellulose, and kaolin according to the proportion to obtain a mixture;

[0025] Step 102 granulation: adding water to the obtained mixture to make spherical particles with a diameter of 10-20 mm; wherein the water content is controlled between 9% and 11% when adding water to adjust;

[0026] Step 103 drying: put the spherical particles into an oven for drying, the drying temperature is 100-120°, and the drying time is 20-40 minutes;

[0027] Step 104 Anaerobic roasting: The dried spherical particles are subjected to an oxygen barrier treatment, transferred to a muffle furnace for high-temperature roasting, and taken out after natural cooling to obtain a new type of mic...

Embodiment 1

[0033] The embodiment of the present invention provides a micro-electrolytic filler for refractory wastewater treatment, which is composed of the following raw materials in weight percentage: 40% of iron filings, 30% of activated carbon powder, 28.8% of clay, 0.2% of sodium carboxymethylcellulose, and 1.0% of kaolin . Its preparation method is carried out according to the following steps:

[0034] (1) Pass the iron filings through a 100-mesh sieve, so that the particle size of the iron filings is less than 0.15mm, and select activated carbon powder with an average pore size of 15-25A and a specific surface area of ​​600-2500m 2 / g, clay is crushed with a crusher, crosses a 100-mesh sieve, and the particle size is less than 0.15mm, then iron filings, activated carbon powder, clay, sodium carboxymethyl cellulose, and kaolin are mixed according to the above ratio to obtain a mixture;

[0035] (2) Granulation: add water to the resulting mixture to make a spherical granule with a ...

Embodiment 2

[0039] The embodiment of the present invention provides a micro-electrolytic filler for refractory wastewater treatment, which is composed of the following raw materials in weight percentage: 30% of iron filings, 40% of activated carbon powder, 27.9% of clay, 0.6% of sodium carboxymethyl cellulose, and 1.5% of kaolin . Its preparation method is carried out according to the following steps:

[0040] (1) Pass the iron filings through a 100-mesh sieve, so that the particle size of the iron filings is less than 0.15mm, and select activated carbon powder with an average pore size of 15-25A and a specific surface area of ​​600-2500m 2 / g, clay is crushed with a crusher, crosses a 100-mesh sieve, and the particle size is less than 0.15mm, then iron filings, activated carbon powder, clay, sodium carboxymethyl cellulose, and kaolin are mixed according to the above ratio to obtain a mixture;

[0041](2) Granulation: add water to the resulting mixture to make a spherical granule with a ...

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Abstract

The invention discloses a micro-electrolysis filler for treatment of hardly degraded waste water. The micro-electrolysis filler consists of the following raw materials in percentage by weight: 30-40% of scrap iron, 30-40% of activated carbon powder, 20-40% of clay, 0.2-0.6% of carboxymethylcellulose sodium, and 1.0-1.5% of kaolin. A preparation method of the micro-electrolysis filler comprises the steps of: (1) performing mixing: uniformly mixing the scrap iron, the activated carbon powder, the clay, the carboxymethylcellulose sodium, and the kaolin in proportion to obtain a mixture; (2) performing granulation: adding water into the obtained mixture, and performing blending to prepare spherical granules; (3) performing drying: drying the spherical granules in a drying oven; and (4) performing oxygen-free calcination: performing oxygen-isolated treatment on the spherical granules, transferring the spherical granules into a muffle furnace, performing high-temperature calcination, and taking the spherical granules after natural cooling to obtain the micro-electrolysis filler. The micro-electrolysis filler disclosed by the invention can keep the characters of the scrap iron and the activated carbon powder very well, and can have relatively high porosity and specific area while the strength of the filler is ensured, so that the COD of waste water can be greatly reduced, and the biodegradability of the waste water is improved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a micro-electrolytic filler for refractory wastewater treatment, and a method for preparing the micro-electrolytic filler for refractory wastewater treatment. Background technique [0002] Micro-electrolysis technology is a technology for pretreatment of high-concentration organic wastewater, also known as internal electrolysis technology. It is a new process developed on the basis of electrochemistry. Its principle is to decompose the pollutants in the waste water by using the weak current spontaneously generated by the micro-electrolysis material filled in the waste water to achieve the purpose of degrading organic pollutants. Purpose. This process has been widely used in the wastewater treatment of printing and dyeing, pharmaceutical, petrochemical and other industries in recent years. It has the advantages of low cost, wide application range, simple process and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCC02F1/46104
Inventor 赵勇娇单连斌王允妹臧雪莉陈星陈明
Owner SHENYANG ACAD OF ENVIRONMENTAL SCI
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