CN102092821A - Application method of high-property activated carbon fibers in treatment of industrial waster water by electrocoagulation - Google Patents

Application method of high-property activated carbon fibers in treatment of industrial waster water by electrocoagulation Download PDF

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Publication number
CN102092821A
CN102092821A CN 201010574619 CN201010574619A CN102092821A CN 102092821 A CN102092821 A CN 102092821A CN 201010574619 CN201010574619 CN 201010574619 CN 201010574619 A CN201010574619 A CN 201010574619A CN 102092821 A CN102092821 A CN 102092821A
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activated carbon
carbon fiber
treatment
trade effluent
application
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吴国君
叶博文
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吴国君
叶博文
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Abstract

The invention discloses an application method of high-property activated carbon fibers in the treatment of industrial waster water by electrocoagulation. In the application method, the industrial waster water is treated by the electrocoagulation, the high-property activated carbon fibers are used as an electrode for electrolysis and has a composition of activated carbon. The high-property activated carbon fiber electrode has the advantages of high electrolysis efficiency, wide application range, low use cost and no secondary pollution, and is beneficial to water reuse treatment by reverse osmosis, thus the high-property activated carbon fibers have an extremely giant application prospect in the process of treating industrial waster water by high-frequency high-voltage impulse electrocoagulation.

Description

The application method of high-performance activated carbon fiber in treatment of industrial waste water by electroflocculation
Technical field
The present invention relates to the processing of trade effluent, the application method of particularly a kind of high-performance activated carbon fiber in treatment of industrial waste water by electroflocculation.
Background technology
Activated carbon is a kind of microcrystalline carbon materials, the same with diamond, graphite it be a kind of of carbon with the element metamer, be a kind of existence form of carbon simple substance.Activated carbon has similar cellular microlitic structure, and its crystallite irregular arrangement has the invisible hole of a large amount of naked eyes in the brilliant gram, thereby it has very big internal surface, and its specific surface area is 500-1700 ㎡/g.This structural performance has determined activated carbon to have very strong absorption property and conductive area, energy adsorptive liquid or solid on its surface, and for liquid, the quality of adsorbed material almost is bordering on the quality of activated carbon own.General used traditionally activated carbon can be divided into powdered activated carbon (AC) and granule activated carbon (GAC), the activated carbon that countries such as 60 years last century U.S., day, Russia develop the third shape in succession be called activated carbon fiber (Activated Carbon Fibers ,/ACF).Domestic at the late nineteen seventies early eighties, also develop activated carbon fiber, can become different shapes through secondary processing because its surface of activated carbon fiber spreads all over micropore, compare with traditional granulated carbon and to have absorption faster, the speed of desorption and the feature of Operation and Maintenance more easily.
The inherent characteristic of the concrete carbon material of activated carbon fiber has the soft workability of textile fibres again concurrently, is the fortifying fibre of a new generation.Inorganics in the aqueous solution, organism and heavy metal ion adsorbed amount are higher 5-6 times than particle, powdered activated carbon.Acidproof, alkaline-resisting, have excellent conducting performance and chemical stability, desorption rate is fast, easily regeneration is the high-efficiency activated sorbing material and the environment-friendly function material of a new generation.Activated carbon fiber mainly is to make through carbonization with natural fiber and artificial organic chemistry fiber.Its main component is made up of carbon atom, and carbon atom mainly exists with the shape that similar graphite microcrystal sheet, breast layer pile up.
Two-way hf and hv pulse electricity flocculation industrial treatment method is a kind of novel method of wastewater treatment, it is that the material that will conductive capability be arranged places pending waste water, adopt two-way hf and hv pulse power supply in water, to switch on electrochemical reaction takes place, produce four kinds of effects such as oxidation, reduction, flocculation and air supporting, make metallic reducing or oxidation by the electron exchange process in the electrolysis, and the ion of the high valence state of part is reduced at a low price or zero-valent state, make most of ionic state metal be converted into the solid particulate postprecipitation of molecular state simultaneously, thereby removed the heavy metal in the water.And a lot of organic pollutant (as oils, tensio-active agent) etc. is arranged since in the electricity flocculation electrolytic process generation of hydroxyl polar group make it to be degraded, trade effluent is purified by electrochemical process for treating.
Hf and hv pulse electricity flocculation technology for treating industrial waste water results from the U.S. the earliest, be mainly used in the improvement of hull mud and oily(waste)water, through being applied to the harmless treatment of metal ion pollution waste water such as smeltery, Electroplate Factory after improvement and the raising again, the present domestic hf and hv pulse electric flocculation technique that in the Industrial Wastewater Treatment field, begun to use.What the material of the conductive electrode in the existing hf and hv pulse electric flocculation technique adopted all is metallic iron or aluminium and materials such as moulding carbon, graphite, though iron or aluminium matter electrode have the convenience of drawing materials, intensity height.Advantages such as good conductivity, and the floss that can produce ferrous iron or aluminium in electrolytic process helps better flocculation sediment, but also have its unsurmountable shortcoming: 1, the metal electrode of iron or aluminium can dissolve in electrolytic process, when especially ought need high-voltage to reduce some ionic, high-frequency and high-voltage can the more violent electrode of dissolution of metals quickly, the oxide compound of generation iron or aluminium in the electrolytic solution again.In order to remove these metal oxides, alkaline matter will be added so that produce basic metal, make the precipitation of hydroxide of its metal of in electrolytic solution, surviving, so just caused a large amount of chemical precipitates to be commonly called as mud, make to produce the waste increase in the wastewater treatment process, cause the secondary pollution in the water treatment procedure.
2, in the electricity of hf and hv pulse flocculation electrolytic process and since in the electrolytic process on the anode surface generation of a large amount of oxygen make the metal electrode of iron or aluminium be easy to take place surface passivation, cause the reduction of further electrolytic efficiency, thereby influence the effect of wastewater treatment.
3, when objectionable constituent in the trade effluent processed intact after, in the water a certain amount of iron or aluminum ion can residually be arranged, give and further adopt reverse osmosis method centering water Treatment for Reuse to bring bigger difficulty.
4, the dissolving of the metal electrode of iron or aluminium has caused the mass consumption of metallic substance in the electricity flocculation electrolytic process, thereby makes the wastage rate of metal electrode very high, has also just increased the use cost of electrode greatly.
5 and adopt moulding carbon to manufacture electrode, though be to have insoluble and can passivation, but poorly conductive can not use as conductive electrode, needs with graphite as conductive electrode, because being carbon dust and pottery mud mixing compacting sintering, moulding carbon forms, complex manufacturing technology, the cost height, carbon dust and pottery mud component proportions small intensity are poor, electroconductibility is low, and its electroconductibility is lower than carbon dust; Being immersed in for a long time in the water can pineization, and carbon dust and pottery mud component proportions are big, and intensity increases, but resistivity also increases, and specific conductivity descends, and while power consumption increase can not be as conductive electrode.
6, use graphite as conductive electrode, good conductivity, but work-ing life is short, graphite is that carbon dust forms in the high pressure compacting, it is used in when soaking in the trade effluent electrolyzer, owing to have the chlorine element in the waste water, can make the graphite pineization one period behind the graphite, so will often change, cost just increases like this.
Summary of the invention
Because the problems referred to above that prior art exists, order of the present invention ground is to propose the application method of a kind of high-performance activated carbon fiber in electrolysis electricity flocculation treatment trade effluent, its high-performance activated carbon fiber that adopts the activated carbon formation is as electrolysis electrode, by the flocculation of hf and hv pulse electricity is weary trade effluent is handled, reached generation of waste and solution metal ionic weight in the minimizing process, avoid electrode passivation.Reduce the effect of export license, thereby improve electric flocculence water treatment effect, reduce secondary pollution, reduce the electrode use cost, and create conditions for the middle water Treatment for Reuse of further reverse osmosis method.
To achieve these goals, the present invention has adopted following technical scheme:
The application method of a kind of high-performance activated carbon fiber in treatment of industrial waste water by electroflocculation, adopt electric flocculence that trade effluent is handled, this method adopts the high-performance activated carbon fiber as electrolytic electrode, and this high-performance activated carbon fiber has the formation of activated carbon.
As further feature of the present invention, the high-performance activated carbon fiber is tabular or the cloth sheet.
As further feature of the present invention, the processing step of the application method of high-performance activated carbon fiber in treatment of industrial waste water by electroflocculation is as follows:
(1) in electricity flocculation electrolyzer, high-performance activated carbon fiber section bar erect and constituted that electrolysis electrode is parallel to each other to be placed in the electrolyzer.
(2) in the PH equalizing tank, the pH value of trade effluent is adjusted to 3-4.
(3) will flow into electricity flocculation electrolyzer through the trade effluent that pH value is regulated, and adopt two-way hf and hv pulse supply current that water is carried out electrolysis again.
(4) trade effluent after the electrolysis enters the PH equalizing tank its pH value is adjusted to 10-10.5.
(5) add a spot of flocculation agent in the waste water after PH regulates, accelerate precipitation is removed throw out.
(6) clear water behind the removal throw out enters the PH equalizing tank its pH value is adjusted back 6-8.
(7) clear water behind the readjustment discharges after back protection filtration.
As further feature of the present invention, the adjustable value of trade effluent pH value is decided according to various ionic compositions and concentration in the trade effluent in the step (2).
As further feature of the present invention, required voltage and current and the flow of electrolysis decided according to various ionic compositions and concentration in the trade effluent in the step (3).
Owing to adopted above technical scheme, the present invention has following advantage in the electric flocculation process of waste water:
1, avoided the secondary pollution of water quality---the high-performance active carbon fiber electrode is because material is nonmetal rather than metals such as iron or aluminium, thereby can in electrolytic process, not dissolve, metallic oxyhydroxide, thereby cause chemical sludge, therefore the high-performance active carbon fiber electrode can not increase any pollutent in wastewater treatment process, and the secondary pollution of water quality also can not take place.
2, prevent electrode passivation, improve electrolytic efficiency---because the high-performance activated carbon fiber self does not participate in oxidizing reaction in electrolytic process, therefore in the electricity flocculation electrolytic process of hf and hv pulse, trade effluent can not made high-performance active carbon fiber electrode surface produce zone of oxidation and cause electrode passivation by electrolysis at a large amount of oxygen that positive electrode surface is separated out, promptly can not influence the conduction activity of carbon dioxide process carbon electrode, directly obtain electron reduction or complex compound and under alkaline condition, obtain great amount of hydroxy group polarity and fully cracked release metal ions and form precipitated metal thereby more help metal ion in the trade effluent, thereby improved the electrolytic efficiency in the wastewater treatment process greatly.The use range of processing method of the present invention that Here it is is more wide in range, more helps adapting to the redox needs of various different pollutents.
3, help trade effluent carry out in the water Treatment for Reuse---since electrode be not iron or, so significantly reduced after treatment remaining iron or aluminum ions content in the water, therefore make trade effluent can be easier to enter reverse osmosis system carry out further in the water Treatment for Reuse.
4, use cost is cheap---and the high-performance active carbon fiber electrode is because the oxidation dissolution on generating electrodes surface not so can not produce consumption, has therefore reduced the use cost of electrode.The high-performance active carbon fiber electrode is higher than the cost performance of iron or aluminium, moulding carbon and Graphite Electrodes.
In a word, high-performance active carbon fiber electrode electrolytic efficiency height, wide accommodation, use cost be low, can not produce secondary pollution and help adopting reverse osmosis method carry out in the water Treatment for Reuse, therefore in hf and hv pulse electricity flocculation Industrial Wastewater Treatment process, have very great application prospect.
Description of drawings
Fig. 1 is an operational flowchart of the present invention.
Embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawings below:
The application method of a kind of high-performance activated carbon fiber in treatment of industrial waste water by electroflocculation, adopt electric flocculence that trade effluent is handled, this method adopts the high-performance activated carbon fiber as electrolytic electrode, and this high-performance activated carbon fiber has the formation of activated carbon; The high-performance activated carbon fiber is tabular or the cloth sheet.
As shown in Figure 1, the processing step of the application method of high-performance activated carbon fiber in treatment of industrial waste water by electroflocculation is as follows:
(1) settle the high-performance active carbon fiber electrode:
In electricity flocculation electrolyzer, high-performance activated carbon fiber section bar erect and constituted that electrolysis electrode is parallel to each other to be placed in the electrolyzer.
(2) regulate pH value:
Measure the pH value of trade effluent, use then by sequence control system control PH auto-controller the pH value of water is transferred to 3-4, its concrete adjustable value will be decided according to the composition and the concentration of metal ion in the trade effluent.
(3) electrolytic flocculation:
Enter electricity flocculation electrolyzer through the water after the PH adjusting, adopt two-way hf and hv pulse periodic reverse power supply, water is carried out electrolysis by the energising of high-performance active carbon fiber electrode.The required voltage of electrolysis is decided according to the composition of metal ion in the trade effluent, generally between 50-100 volts; Electric current is about 300 amperes, and the composition of the metal ion that electricity flocculation electric contact time and flow are handled according to needs in the trade effluent fully and concentration and electrolytic efficient are determined.
(4) regulate pH value:
Water after the electrolysis enters equalizing tank, and utilization PH auto-controller is adjusted to the pH value of water in 10-10.5 scopes.
(5) flocculation sediment:
In the above-mentioned water that regulates pH value, add small amount of flocculant (for example PAM), enter settling tank after the stirring and carry out flocculation sediment.
(6) readjustment pH value:
Clear water behind the removal throw out enters the PH equalizing tank its pH value is adjusted back 6-8.
(7) filtering emission:
After clear water behind the readjustment is also tested after filtration and reached emission standard, enter the discharging of discharging pond or enter the reverse osmosis process system and further carry out middle water recovering process processing.
Adopt the high-performance active carbon fiber electrode that trade effluent is carried out electric flocculence and handle, can in electrolytic process, generating electrodes not dissolve and cause chemical sludge, avoided the secondary pollution of water quality; Passivation can not take place in electrode yet, has improved electrolytic efficiency, helps adapting to the processing needs of various different pollutents; Simultaneously can not produce consumption of electrode, reduce the use cost of electrode; And reduced after treatment remaining iron or aluminum ions content in the water, be convenient to trade effluent enter reverse osmosis system carry out in the water Treatment for Reuse.
For embodiment water treatment effect of the present invention is described below:
Embodiment:
The Industrial Wastewater Treatment object is a metallic copper nickel chromium triangle electroplating wastewater, and an ionic concn content and other index are as follows in the preceding water of processing:
Metallic nickel: 60mg/L, metallic copper: 80mg/L, chromium metal: 40mg/L, cyanogen: 100mg/L;
The COD(chemical oxygen demand (COD)); 250mg/L,
PH=2.3
Adopt the application method of moulding carbon of the present invention in treatment of industrial waste water by electroflocculation to handle to above-mentioned waste water, in step (2), regulate the pH value to 3-4 of waste water; In step (3), electricity flocculation back water quality is 4-5; In step (4), regulate the PH=10-10.5 of water; , the electric flocculation sediment of step (5) filters the back discharging after arriving (7) again after adjusting back through (6).
Described waste water process is with behind the flocculation process that powers on, and the sampling analysis result who handles the back clear water is as follows:
PH=7.7,?COD<60mg/L
Ionic concn content:
Metallic nickel<0.10mg/L, metallic copper<0.10mg/L, chromium metal<0.10mg/L, cyanogen<0.10mg/L;
Above analytical results shows, has reached national table 2 standard after waste water is processed, and what have reaches national table 3 standard.
But above-mentioned embodiment is exemplary, is to be the restriction that this patent is comprised scope in order better to make those skilled in the art can understand this patent, can not to be interpreted as; So long as according to spirit that this patent discloses done anyly be equal to change or modify, all fall into the scope that this patent comprises.

Claims (5)

1. the application method of a high-performance activated carbon fiber in treatment of industrial waste water by electroflocculation, adopt electric flocculence that trade effluent is handled, it is characterized in that: described method adopts the high-performance activated carbon fiber as electrolytic electrode, and this high-performance activated carbon fiber has the formation of activated carbon.
2. the application method of high-performance activated carbon fiber according to claim 1 in treatment of industrial waste water by electroflocculation is characterized in that: described high-performance activated carbon fiber is tabular or the cloth sheet.
3. the application method of high-performance activated carbon fiber according to claim 2 in treatment of industrial waste water by electroflocculation, it is characterized in that: the processing step of described method is as follows:
(1) in electricity flocculation electrolyzer, described high-performance activated carbon fiber section bar erect and constituted that electrolysis electrode is parallel to each other to be placed in the electrolyzer;
(2) in the PH equalizing tank, the pH value of trade effluent is adjusted to 3-4;
(3) will flow into described electricity flocculation electrolyzer through the trade effluent that pH value is regulated, and adopt two-way hf and hv pulse supply current that water is carried out electrolysis again;
(4) trade effluent after the electrolysis enters the PH equalizing tank its pH value is adjusted to 10-10.5;
(5) add a spot of flocculation agent in the waste water after PH regulates, accelerate precipitation is removed throw out;
(6) clear water behind the removal throw out enters the PH equalizing tank its pH value is adjusted back 6-8;
(7) clear water behind the readjustment discharges after back protection filtration.
4. the application method of high-performance activated carbon fiber according to claim 3 in treatment of industrial waste water by electroflocculation is characterized in that: the adjustable value of trade effluent pH value is decided according to various ionic compositions and concentration in the trade effluent in the described step (2).
5. the application method of high-performance activated carbon fiber according to claim 3 in treatment of industrial waste water by electroflocculation is characterized in that: required voltage and current and the flow of electrolysis decided according to various ionic compositions and concentration in the trade effluent in the described step (3).
CN 201010574619 2010-12-06 2010-12-06 Application method of high-property activated carbon fibers in treatment of industrial waster water by electrocoagulation Pending CN102092821A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102826704A (en) * 2012-09-20 2012-12-19 艾特克控股集团有限公司 Recycle system for recycled water
CN103979646A (en) * 2014-06-04 2014-08-13 江苏科技大学 Continuous electric flocculation water treatment method for dosing along process
CN104528978A (en) * 2014-12-30 2015-04-22 王亮 Non-chemical manner softened water device
CN105036258A (en) * 2015-09-09 2015-11-11 陆秀英 Application method of porous graphite electrode in industrial wastewater treatment
CN105565553A (en) * 2015-12-22 2016-05-11 解艳超 Zero-emission purifying and recycling system of cyanide-containing heavy metal wastewater

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101376548A (en) * 2008-09-19 2009-03-04 袁伟光 Waste water advanced purifying process and equipment thereof
CN101698523A (en) * 2009-12-01 2010-04-28 陆秀英 Method for applying molded carbon in treatment of industrial waste water by electroflocculation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101376548A (en) * 2008-09-19 2009-03-04 袁伟光 Waste water advanced purifying process and equipment thereof
CN101698523A (en) * 2009-12-01 2010-04-28 陆秀英 Method for applying molded carbon in treatment of industrial waste water by electroflocculation

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102826704A (en) * 2012-09-20 2012-12-19 艾特克控股集团有限公司 Recycle system for recycled water
CN102826704B (en) * 2012-09-20 2015-04-08 江苏艾特克环境工程有限公司 Recycle system for recycled water
CN103979646A (en) * 2014-06-04 2014-08-13 江苏科技大学 Continuous electric flocculation water treatment method for dosing along process
CN103979646B (en) * 2014-06-04 2015-07-15 江苏科技大学 Continuous electric flocculation water treatment method for dosing along process
CN104528978A (en) * 2014-12-30 2015-04-22 王亮 Non-chemical manner softened water device
CN105036258A (en) * 2015-09-09 2015-11-11 陆秀英 Application method of porous graphite electrode in industrial wastewater treatment
CN105565553A (en) * 2015-12-22 2016-05-11 解艳超 Zero-emission purifying and recycling system of cyanide-containing heavy metal wastewater

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