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Granular anti-hardening acid-base dual-purpose ternary micro-electrolysis filler and preparation method thereof

A micro-electrolysis, dual-purpose technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc. problems, to achieve the effect of slowing down consumption, increasing service life, and reducing electron transfer resistance

Active Publication Date: 2012-07-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after the traditional micro-electrolysis process has been in operation for a period of time, the sewage will flow in the filler after the iron filings are agglomerated, which will deteriorate the quality of the effluent water. This is also a major factor limiting the application and promotion of the micro-electrolysis process.
The common iron-carbon micro-electrolysis reaction is generally carried out under acidic conditions. For alkaline wastewater, the pH needs to be readjusted to acidity, which increases the treatment cost to a certain extent.

Method used

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  • Granular anti-hardening acid-base dual-purpose ternary micro-electrolysis filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In parts by weight, weigh 50 parts of Fe powder, 50 parts of Al powder, and 10 parts of graphite powder, dry them in vacuum, mix them completely in a mixer, place them in a granulator, and add 15 parts of the mass prepared by sodium silicate. Concentration of 5% sodium silicate solution, rolled into a ball. Place the prepared raw meal balls in a tube furnace protected by a nitrogen atmosphere, raise the temperature to about 150°C at a rate of 3°C / min, and keep warm for 30 minutes, then continue to heat up to 700°C at a rate of 3°C / min, and keep warm for 2 hours . Cool down to 60°C at a rate of 3°C / min, take out the pellets, and keep them sealed.

[0036] The performance parameters of the obtained Fe-Al-C ternary micro-electrolytic filler are as follows:

[0037] Particle size: 3mm; Bulk density: 1100kg / m 3 ;Particle density: 2105kg / m 3;Water Absorption: 12%.

Embodiment 2

[0039] In parts by weight, weigh 40 parts of Fe powder, 45 parts of Al powder, and 15 parts of graphite powder, dry in vacuum, mix completely in a mixer, place in a granulator, add 18 parts of binder (1%wt poly Vinyl alcohol+2%wt carboxymethylcellulose sodium mixed liquor) solution, rolled into balls. Put the prepared raw meal balls in a tube furnace protected by a nitrogen atmosphere, raise the temperature to about 120°C at a rate of 2°C / min, keep warm for 20 minutes, continue to raise the temperature to 650°C at a rate of 2°C / min, and keep warm for 1.5 hours . Cool down to 80°C at a rate of 2°C / min, take out the pellets, and keep them sealed. Take out the ball and keep it sealed.

[0040] The performance parameters of the obtained Fe-Al-C ternary micro-electrolytic filler are: particle size: 2.5mm; bulk density: 1053kg / m 3 ;Particle density: 2030kg / m 3 ;Water Absorption: 11%.

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Abstract

The invention relates to a granular anti-hardening acid-base dual-purpose ternary micro-electrolysis filler and a preparation method thereof. The grain size of the filler ranges from 1mm to 5mm, and iron powder, aluminium powder and graphite powder are mixed in a mass ratio of (2-6):(2-6):1 to perform granulation and then are sintered by being isolated from air, thus obtaining the filler. The micro-electrolysis filler is applicable to micro electronic treatment on acid sewage or base sewage. According to the invention, the efficiency of micro electrolysis on the sewage is high, a filling areais not easy to harden, and the period of back flushing is long. When the ternary micro-electrolysis filler is used for treating the sewage, CODcr (chemical oxygen demand) of the sewage can be reducedefficiently in a short time, and the biochemistry of the sewage can be improved. According to the invention, the raw materials are easy to obtain, the preparation process is simple, the problem of filler hardening of the conventional micro-electrolysis technology is solved, and the filler is applicable to treatment on the base sewage.

Description

technical field [0001] The invention relates to a granular anti-hardening acid-base dual-purpose ternary micro-electrolytic filler and a preparation method thereof, belonging to the field of sewage treatment, especially the field of pretreatment of highly toxic and refractory organic waste water. Background technique [0002] After the 1950s, due to the development of the modern chemical industry, a large number of artificially synthesized organic compounds were produced, such as synthetic plastics, synthetic fibers, organic pesticides, synthetic rubber, and surfactants. During the production and use of these organic substances, a large amount of organic wastewater will be generated. According to the "National Environmental Statistical Bulletin", by 2008, in my country's total wastewater discharge, industrial organic wastewater accounted for 44.3%. Its concentration is high, its composition is complex, and it often contains many refractory organic substances, such as dyes, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
Inventor 岳钦艳张晓伟吴苏清高悦王勃岳东亭高宝玉
Owner SHANDONG UNIV
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