CN102583659B - Granular anti-hardening acid-base dual-purpose ternary micro-electrolysis filler and preparation method thereof - Google Patents
Granular anti-hardening acid-base dual-purpose ternary micro-electrolysis filler and preparation method thereof Download PDFInfo
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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 area is 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 reduced efficiently 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
The present invention relates to dual-purpose ternary micro-electrolysis filler of a kind of granular anti-hardening acid-base and preparation method thereof, belong to sewage treatment area, especially the preprocessing technical field of high toxicity organic wastewater with difficult degradation thereby.
Background technology
After the 1950's, due to the modern chemistry industrial expansion, a large amount of synthetic organic compound have been produced, as synthetic plastics, synthon, organic pesticide, synthetic rubber, tensio-active agent etc.In the processes such as production, use, can produce a large amount of organic waste water at these organism.Show according to " national Environmental statistics communique " statistics, in China's waste water total release in 2008, industrial organic waste water amount proportion reaches 44.3%.Its concentration is high, complicated component, and wherein often contains many hardly degraded organic substances, as dyestuff, Nitro-aromatic Compounds in Different, polycyclic aromatic hydrocarbons, alkyl benzene sulphonate (ABS), chlorophenol, polychlorobiphenyl and humic acid etc.Wherein some organism has the effects such as carcinogenic, teratogenesis, mutagenesis, and environment and the mankind are had huge harm.High concentration hard-degraded organic waste water generally adopts pre-treatment-biochemical degradation technology, but the preconditioning technique of current organic waste water, the perhaps high-leveled and difficult popularization of cost perhaps exists open defect without the development prospect, or it is less to adapt to kind of waste water.
Micro-electrolysis method is called again internal electrolysis, is to be widely studied and a kind of method of wastewater treatment of using.The eighties in 20th century, this method was introduced China.Micro-electrolysis method successfully is applied to the processing of the waste water such as dyestuff, printing and dyeing, heavy metal, agricultural chemicals, pharmacy, oil content at present.The characteristics such as that little electrolysis has is with low cost, use range is wide, technique is simple, treatment effect is good, especially for high salinity, the processing of the trade effluent that high toxicity, high COD and colourity are higher has more significantly advantage than other techniques.The waste water of difficult for biological degradation B/C after little electrolysis process is processed improves greatly, is conducive to the raising of subsequent biological treatment effect.The domestic pre-treatment that generally this technique is used for waste water, perhaps with other process integrations to reach the purpose of removing pollutent.But traditional little electrolysis process is after operation for some time, and after iron filings filler caking, sewage produces channel in filler, makes the effluent quality variation, and this is also a principal element of the little electrolysis process application of restriction.Common iron-carbon micro-electrolysis reaction is generally carried out under acidic conditions, need readjust its pH to acid for meta-alkalescence waste water, has increased to a certain extent processing cost.
CN101746856B (CN201010110740.2) discloses a kind of sewage disposal micro-electrolysis stuffing.This filler is cylinder-like structure, at the even cloth of the outer side wall of filler if the end face of filler is rendered as the groove of gear shape.The regular structure of this filler makes the filler that is deposited in together, keeps each other enough gaps, guarantees the abundant contact reacts of filler and water, reduce simultaneously the resistance to flow of water, the profile of filler has increased the specific surface area of filler as much as possible, and little electrolysis effectiveness is obvious, and bio-film colonization is easy.CN102276021A (CN201110151328.X) discloses a kind of Multi-component oxidized micro-electrolysis filler and preparation method thereof.Iron filings, gac, binding agent and catalyzer are mixed according to proportioning, and after adding water and stirring ageing, extrusion molding obtains the moulding filler, through the demoulding, and oven dry, sintering namely obtains Multi-component oxidized micro-electrolysis filler, is Regularization porous honeycomb coaly structure.Binding agent is clay or water glass.CN101486509B (CN200810230345.0) discloses a kind of massive micro-electrolysis stuffing, coking coal, iron filings and binding agent are mixed under 80-300 ℃ of condition in proportion, extrusion forming under 5-15MPa pressure, material after moulding under 1300-1800 ℃ of condition high temperature carbonization 3-8 hour obtains massive micro-electrolysis stuffing; Described binding agent is selected from one or more combinations in resol, starch, tar.
Summary of the invention
For the problem that exists in the micro electrolysis tech actual application, the invention provides dual-purpose ternary micro-electrolysis filler of a kind of granular anti-hardening acid-base and preparation method thereof.
Technical solution of the present invention is as follows:
The dual-purpose Fe-Al-C ternary micro-electrolysis filler of a kind of granular anti-hardening acid-base, this filler is the round shaped grain shape, and particle diameter is 1～5mm, and by iron powder, aluminium powder and Graphite Powder 99 (2～6) in mass ratio: (2～6): 1 mixing granulation, isolated air calcination makes.
Preferably, packing material size is 2～3mm, by iron powder, aluminium powder and Graphite Powder 99 5: 5: 1 mixing granulations in mass ratio.
According to the present invention, the preparation method of the dual-purpose Fe-Al-C ternary micro-electrolysis filler of a kind of granular anti-hardening acid-base comprises that step is as follows:
(1) take respectively in proportion iron powder, aluminium powder, Graphite Powder 99, vacuum drying;
(2) iron powder, aluminium powder, the Graphite Powder 99 with oven dry mixes, and is placed in tablets press, and technology adds cakingagent solution routinely, makes the raw material ball spherolite.
(3) raw material ball with preparation in step (1) is placed in the tube furnace of nitrogen atmosphere protection; be warming up to 120-150 ℃ with the speed of 2-5 ℃/minute; be incubated after 20-40 minute, the speed that continues with 2-5 ℃/minute is warming up to 600-700 ℃, is incubated 1.5-2.5 hour.Be cooled to below 100 ℃ with the speed of 2-5 ℃/minute, pellet is taken out, sealing is preserved.
In step (2), cakingagent gets final product by state of the art.Described cakingagent solution usage is the 5-20wt% of iron powder, aluminium powder and Graphite Powder 99 total mass.Preferred cakingagent solution usage accounts for the 10-15wt% of iron powder, aluminium powder and Graphite Powder 99 mixture quality.
In step (2), cakingagent is selected from water glass, the perhaps combination of polyvinyl alcohol and Xylo-Mucine, and cakingagent is made into the aqueous solution and adds.The sodium silicate solution that is made into concentration 5-10wt% when preferably, using the water glass cakingagent adds; When using polyvinyl alcohol to make up cakingagent with Xylo-Mucine, be made into the 1%wt polyvinyl alcohol and 2%wt Xylo-Mucine mixed solution adds.
All raw materials of the present invention are the commercial goods.Described iron powder is commercially available technical grade reduction Fe powder, and particle diameter is less than 60 orders; Aluminium powder is commercially available technical grade aluminium powder, and particle diameter is less than 60 orders; Graphite Powder 99 is commercially available technical grade electrode graphite powder, and particle diameter is less than 100 orders.
The present invention do not limit in detail all by state of the art, being cooled to after the pellet sintering in step (3) and taking out one below 100 ℃ again is pellet is lowered the temperature gradually and can extend soaking time under gradient temperature, the stable homogenizing that is conducive to the pellet internal organizational structure, the 2nd, can avoid pellet surface Yin Gaowen by Quick Oxidation.Described be cooled to below 100 ℃ can be 100 ℃ to room temperature.
The ternary micro-electrolysis filler physical parameter that the present invention makes is as follows:
Particle diameter: 1～5mm, preferred 2～3mm;
Tap density: 1000～1105kg/m
3
Pellet density: 2000～2177.5kg/m
3
Water-intake rate: 10～15%.
Fe-Al-C ternary micro-electrolysis filler of the present invention has following useful effect:
1, the micro-electrolysis stuffing of the present invention's employing is the Fe-Al-C ternary micro-electrolysis filler, and the intermetallic Fe-Al compound that forms in the raw material sintering process has certain intensity as the framework ingredient of filler, and the simple substance such as iron, aluminium, carbon are distributed between skeleton.Fe, Al metal simple-substance are more active, and be very fast in acid solution (Fe/Al) or alkali lye (Al) corrosion speed, cause the loss of active metal, and the erosion rate of intermetallic Fe-Al compound is relatively slow.Therefore, the consumption that in control sintering filler, the ratio of ferro-aluminium and iron aluminium simple substance can be slowed down filler to a certain extent increases work-ing life.
2, micro-electrolysis stuffing of the present invention is immersed in sewage and forms multistage galvanic corrosion, and electron acceptor(EA) is multiplied, and pollutent obviously accelerates to the rate of mass transfer of electrode surface, thereby improves processing efficiency.
3, micro-electrolysis stuffing of the present invention is regular granular, and the Limited contact between grain and grain can effectively be avoided hardening.
4, the inner iron of micro-electrolysis stuffing of the present invention, aluminium, graphite simple substance and intermetallic Fe-Al compound are conductive component, by sintering, it are integrated and can effectively reduce anode and cathode electronics transmission resistance, have improved speed of reaction.
5, in the Fe-Al-C ternary micro-electrolysis filler, micro-electrolysis reaction can occur in the Fe composition in the slant acidity environment, and the Al composition can participate in micro-electrolysis reaction under alkaline condition, Fe Al restructuring can make this micro-electrolysis stuffing both be applicable to acid waste water, be applicable to again alkaline waste water, enlarged the range of application of micro-electrolysis stuffing.
6, the Fe-Al-C ternary micro-electrolysis filler helps to reduce the difficulty of adaptive water treating device design, and the space that is evenly distributed between filler accumulation simultaneously makes reactor be difficult for blocking; The tap density of filler is lower, and hardness is higher, and in the time of can avoiding little electrolysis back flushing, filler breaks up.
The present invention is a kind of based on high toxicity hardly degraded organic substance generation redox reaction in the Fe in micro-electrolysis stuffing, Al isoreactivity composition and sewage, under the effects such as galvanic deposit, flocculating settling, reaches and improves Biodegradability of Wastewater, reduction COD
Cr, alleviate the effect of follow-up biochemical treatment organic loading.The little electrolysis of application Fe-Al-C ternary is carried out sewage disposal and can effectively be reduced at short notice the COD of sewage
CrAnd raising Biodegradability of Wastewater.The present invention provides a kind of feasible scheme for micro electrolysis tech applying aspect the high concentration hard-degraded organic waste water pre-treatment.
Description of drawings
Fig. 1 is the cylindricality micro-electrolysis reaction device schematic diagram of micro-electrolysis stuffing, the 1st, and inlet flume, the 2nd, advance the water peristaltic pump, the 3rd, cylindricality reactor, the 4th, air pump, the 5th, aqueous vapor grid distributor, the 6th, micro-electrolysis stuffing.
Embodiment
The present invention is further elaborated below in conjunction with embodiment, but be not limited to this.
In embodiment, iron powder used is commercially available technical grade reduction Fe powder (Laiwu hundred million come powder metallurgy company to produce sell), and particle diameter is less than 60 orders; Aluminium powder is commercially available technical grade aluminium powder (Shanghai nine ancient cooking vessel powder body material companies produces and sell), and particle diameter is less than 60 orders; Graphite Powder 99 is commercially available technical grade electrode graphite powder (Qingdao China safe graphite company produces and sells), and particle diameter is less than 100 orders.
Consumption raw materials used in embodiment is mass parts.
By weight, take respectively 50 parts of Fe powder, 50 parts of Al powder, 10 parts of Graphite Powder 99s, vacuum drying mixes being placed in tablets press fully in mixing tank, add 15 parts by mass concentration 5% sodium silicate solution of water glass preparation, rolling balling-up.The raw material ball of preparation is placed in the tube furnace of nitrogen atmosphere protection, is warming up to 150 ℃ of left and right with the speed of 3 ℃/minute, after insulation 30min, the speed that continues with 3 ℃/minute is warming up to 700 ℃, is incubated 2 hours.Be cooled to 60 ℃ with the speed of 3 ℃/minute, pellet is taken out, sealing is preserved.
The performance perameter of gained Fe-Al-C ternary micro-electrolysis filler is as follows:
Particle diameter: 3mm; Tap density: 1100kg/m
3Pellet density: 2105kg/m
3Water-intake rate: 12%.
By weight, take respectively 40 parts of Fe powder, 45 parts of Al powder; 15 parts of Graphite Powder 99s, vacuum drying mixes being placed in tablets press fully in mixing tank; add 18 parts of cakingagents (1%wt polyvinyl alcohol+2%wt Xylo-Mucine mixed solution) solution, the rolling balling-up.The raw material ball of preparation is placed in the tube furnace of nitrogen atmosphere protection, is warming up to 120 ℃ of left and right with the speed of 2 ℃/minute, after insulation 20min, the speed that continues with 2 ℃/minute is warming up to 650 ℃, is incubated 1.5 hours.Be cooled to 80 ℃ with the speed of 2 ℃/minute, pellet is taken out, sealing is preserved.Pellet is taken out, and sealing is preserved.
The performance perameter of gained Fe-Al-C ternary micro-electrolysis filler is: particle diameter: 2.5mm; Tap density: 1053kg/m
3Pellet density: 2030kg/m
3Water-intake rate: 11%.
The application test example:
Adopt simple cylindricality micro-electrolysis reaction device shown in Figure 1, the embodiment of the present invention 1,2 Fe-Al-C ternary micro-electrolysis filler are carried out application test.
Simple cylindricality micro-electrolysis reaction device comprises inlet flume 1, water inlet peristaltic pump 2, and cylindricality reactor 3, the in-built Fe-Al-C ternary micro-electrolysis filler 6 of cylindricality reactor 3 also has air pump 4, aqueous vapor grid distributor 5, reactor open topped in addition.Sewage enters cylindricality reactor 3 by inlet flume 1 through peristaltic pump 2, fully contacts with micro-electrolysis stuffing 6 through the packing area and micro-electrolysis reaction occurs, and water outlet is by reactor top eliminating.Suitably aeration can promote Fe (OH) in the reactor
3Thereby formation strengthen Flocculation Settling Process, be conducive to reduce the COD of sewage
Cr Peristaltic pump 2 can serve as backwash pump, back flushing is carried out in the packing area flocculent precipitate can be gone out, and after preventing from reacting for a long time, the packing area is blocked.
The application test situation is as follows:
1, the Fe-Al-C ternary micro-electrolysis filler of embodiment 1 is as in the packing area, and the sewage in inlet flume 1 uses respectively COD
CrBe about 12000 dyeing waste-water in 10000-12000mg/L industry coked waste water, colourity; Result shows that the Fe-Al-C ternary micro-electrolysis filler of embodiment 1 makes the COD of industrial coked waste water
CrBe down to 4000mg/L by 10000-12000mg/L in 2h, B/C is increased to 0.4 by 0.12, and reactor moves 5 days continuously without back flushing, and outlet effect is basicly stable; Do not make and be initially the colourity that pH=10, colourity be about 12000 dyeing waste-water and all remove in the situation that regulate pH.
2, the Fe-Al-C ternary micro-electrolysis filler of embodiment 2 is as in the packing area, and the sewage in inlet flume 1 uses respectively 600mg/L Acid Brilliant Scarlet GR simulated wastewater, the 500mg/L vinyl cyanide cyanogens-containing sewage water of pH=9.Test-results is presented in 1h the chroma removal rate of the 600mg/L Acid Brilliant Scarlet GR simulated wastewater of pH=9 nearly 100%, COD
CrClearance reaches more than 60%; Cryanide ion in Wastewater from Acrylonitrile Production is approached all remove (the cryanide ion starting point concentration is 5-7mg/L, is down to after processing below 0.2mg/L).
Terminological interpretation:
B/C is writing a Chinese character in simplified form of BOD5/COD in wastewater treatment, and the ratio of namely 5 days biochemical oxygen demand (BOD)s and chemical oxygen demand (COD) has represented the biodegradability of waste water, and biodegradability of the larger waste water of this value is better.
COD
Cr, adopt potassium bichromate to be expressed as COD as the chemical oxygen demand that oxygenant determines
Cr, measure unit is mg/L.
The Acid Brilliant Scarlet GR simulated wastewater adopts the water-soluble formulated simulated sewage of Acid Brilliant Scarlet GR powder, and wherein the Acid Brilliant Scarlet GR powder is available from Yongxing, Jinan dyestuff company.
Claims (1)
1. the preparation method of the dual-purpose Fe-Al-C ternary micro-electrolysis filler of soda acid, is characterized in that this filler is the round shaped grain shape, and particle diameter is 1～5mm, by iron powder, aluminium powder and Graphite Powder 99 (2 ~ 6) in mass ratio: (2 ~ 6): 1 mixing granulation, isolated air calcination makes;
Step is as follows:
(1) take respectively in proportion iron powder, aluminium powder, Graphite Powder 99, vacuum drying;
(2) iron powder, aluminium powder, the Graphite Powder 99 with oven dry mixes, and is placed in tablets press, and technology adds cakingagent solution routinely, makes the raw material ball spherolite;
(3) raw material ball with preparation in step (2) is placed in the tube furnace of nitrogen atmosphere protection, be warming up to 120-150 ℃ with the speed of 2-5 ℃/minute, be incubated after 20-40 minute, the speed that continues with 2-5 ℃/minute is warming up to 600-700 ℃, is incubated 1.5-2.5 hour; Be cooled to below 100 ℃ with the speed of 2-5 ℃/minute, pellet is taken out, sealing is preserved.
2, the preparation method of Fe-Al-C ternary micro-electrolysis filler as claimed in claim 1 is characterized in that packing material size is 2～3mm, by iron powder, aluminium powder and Graphite Powder 99 5:5:1 mixing granulation in mass ratio.
3, the preparation method of Fe-Al-C ternary micro-electrolysis filler as claimed in claim 1 is characterized in that described iron powder is commercially available technical grade reduction Fe powder, and particle diameter is less than 60 orders; The aluminium powder particle diameter is less than 60 orders; The Graphite Powder 99 particle diameter is less than 100 orders.
4, the preparation method of the dual-purpose Fe-Al-C ternary micro-electrolysis filler of soda acid as claimed in claim 1 is characterized in that the cakingagent solution usage described in step (2) is the 5-20% of iron powder, aluminium powder and Graphite Powder 99 total mass.
5, the preparation method of the dual-purpose Fe-Al-C ternary micro-electrolysis filler of soda acid as claimed in claim 1 is characterized in that the middle cakingagent solution usage of step (2) accounts for the 10-15% of iron powder, aluminium powder and Graphite Powder 99 mixture quality.
6, the preparation method of the dual-purpose Fe-Al-C ternary micro-electrolysis filler of soda acid as claimed in claim 1 is characterized in that in step (2), cakingagent is selected from water glass, the perhaps combination of polyvinyl alcohol and Xylo-Mucine.
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| CN103253741B (en) * | 2013-05-10 | 2014-01-01 | 山东大学 | Method for preparing anti-hardening granular ceramic iron-carbon micro-electrolysis filler from industrial wastes |
| CN103332767B (en) * | 2013-06-14 | 2015-01-28 | 合肥正清环保科技开发有限公司 | Method for producing iron carbon micro-electrolysis filler from nonferrous metal waste ore slag |
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| CN105858817A (en) * | 2016-03-26 | 2016-08-17 | 沈阳环境科学研究院 | Micro-electrolysis filler for treatment of hardly degraded waste water and preparation method of micro-electrolysis filler |
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| CN112875810B (en) * | 2021-01-12 | 2021-12-14 | 北京市高速公路交通工程有限公司 | Multielement microelectrolysis filler and preparation method thereof |
| CN113860645A (en) * | 2021-10-14 | 2021-12-31 | 江苏京源环保股份有限公司 | Method for treating high-concentration degradation-resistant organic wastewater |
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| JP5153565B2 (en) * | 2008-10-23 | 2013-02-27 | 株式会社オメガ | Wastewater treatment method |
| CN101817574B (en) * | 2010-04-16 | 2012-06-13 | 吉林大学 | Preparation method of regular iron-carbon micro-electrolysis filler |
| CN201914952U (en) * | 2010-10-11 | 2011-08-03 | 上海敏慎环保科技有限公司 | Multi-phase iron-carbon micro-electrolysis reactor |
| CN102276021B (en) * | 2011-06-08 | 2013-03-06 | 煤炭科学研究总院杭州环保研究院 | Multi-component oxidized micro-electrolysis filler and preparation method thereof |
| CN102276091A (en) * | 2011-06-10 | 2011-12-14 | 南京科盛环保科技有限公司 | Method for pretreating printing and dyeing wastewater with micro-electrolytic fluidized bed technique |
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