CN103058333A - Additional electric field reinforced circulating type internal electrolysis device - Google Patents
Additional electric field reinforced circulating type internal electrolysis device Download PDFInfo
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- CN103058333A CN103058333A CN2013100054878A CN201310005487A CN103058333A CN 103058333 A CN103058333 A CN 103058333A CN 2013100054878 A CN2013100054878 A CN 2013100054878A CN 201310005487 A CN201310005487 A CN 201310005487A CN 103058333 A CN103058333 A CN 103058333A
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Abstract
The invention discloses an additional electric field reinforced circulating type internal electrolysis device and belongs to the industrial wastewater processing field. The device comprises a filler tower, a refluxing tank and electrode pairs, wherein the filler tower comprises a water inlet, a refluxing liquid inlet, a water distribution layer and a gas distribution system, the middle of the filler tower is provided with a supporting layer, the filler is divided into an upper layer and a lower layer, and the upper portion of the filler tower is provided with annular overflow weirs and a water outlet; the refluxing tank is provided with a water outlet, an aeration system, (two layers of) porous plates, and an upper portion water inlet/outlet; and one or more groups of the electrode pairs are arranged in the filler layer. The device is characterized in that the filler is maintained in a suspension state under the cooperation of a circulating water flow and the aeration promotion, and the deposit hardening and pollution are avoided through removing the deposit enriched in the filler by means of the shearing force of the water flow; passivation is alleviated through constructing the different oxygen environments of the internal layer and the external layer by treating honeycomb-shaped spongy iron as an iron material; and the addition of a proper electric field to the filler accelerates the mobility of electrons between the filler, and reinforces the primary batteries series redox reaction, so the device disclosed in the invention has a higher effectiveness than traditional internal electrolysis devices in the industrial wastewater processing.
Description
Technical field
The invention belongs to and process the indegradable industrial effluent category, its content relates to a kind of novel additional electric field reinforced circulating type inner electrolyser.
Background technology
Internal electrolysis is to utilize fe and gac to consist of the filter tank for filler, and the wastewater processing technology that a series of electrochemistry and physical-chemical reaction cause organic pollutant to obtain processing occurs through this filter tank waste water.Utilize this method that waste water is processed and to reduce its COD
Cr, remove colourity, improve wastewater biodegradability.Its principle is to utilize iron and gac to consist of small galvanic cell, forms electric field in the space, iron anode namely occurs lose electronics generation Fe
2+, electronics flows into the charcoal negative electrode and forms OH
-And nascent state [H], have simultaneously the effects such as flocculation, absorption, co-precipitation concurrently, realize effective removal of pollutent.From Fe
0/ Fe
2+And Fe
2+/ Fe
3+Conversion process as can be known, short period of time stripping Fe
2+Amount most important to the processing efficiency that improves inner electrolyser.For this reason, the electric field of additional suitable has not only accelerated Fe in circulating inner electrolyser
2+Stripping, but also improved its effective content, thus strengthened the processing efficiency of this electrolyzer.
At present, internal electrolysis has been widely applied to garbage leachate, petrochemical wastewater, electroplating technology waste water and dyeing waste water etc., especially suitable treatment short run trade effluent.But still there is drawback in this method, thereby restricted its practicalization, be mainly reflected in: (1) packing layer channeling: iron charge tangles mutually because of corrosion in operational process, and follows the deposition of pollutent to cause whole packing layer channel to occur, thereby has affected processing efficiency; (2) iron charge problem of passivation: with iron charge corrosion, the top layer is hidden by its erosion little by little that (main component is γ-FeOOH), thereby has seriously hindered the redox reaction of iron charge.For overcoming the problems referred to above, present improvement measure is mainly from filler and reaction unit two aspect developings.Such as patent CN201376905Y: designed rotary interior electrolytic processing apparatus, hardened although its structure is compact, floor space is little, can alleviate filler, long-time running easily causes the filler efflorescence and runs off, so limited its application.And for example patent 201010256431.6: introduced a kind of compounded mix that contains catalyzer, because it has polynuclear plane, guaranteed fully to contact with waste water energy, having alleviated filler hardens, the reduce mud amount, improved water treatment effect, yet the production cost of this filler is high, and still exists with the passivation that prolongs iron charge working time and pollution.
Summary of the invention
The objective of the invention is to put forth effort to overcome the prior art defective, especially face directly the internal electrolysis filler in application, present harden, the problem such as channel and iron charge passivation and the present situation that causes treatment effect to descend designs a kind of additional electric field reinforced circulating type inner electrolyser.
The technical solution used in the present invention is as follows:
In the bottom of packing tower 12, establish water-in 17, evacuation port 18, phegma entrance 19, inlet mouth 22, water distribution layer 16 and gas distribution system 21, wherein gas distribution system 21 is comprised of six aeration plates 20; At the middle part of packing tower 12, load upper and lower two- layer filler 5,14, its side is provided with discharge opening 8, and charging bole 11 is established in lower floor's filler 14 sides, and porous plate 10 and screen cloth 9 are all installed in two- layer filler 5,14 bottoms; Annular overflow weir 1 and water outlet 2 are established in the top of packing tower 12; Water-in 3 and water outlet 4 are established in return tank 15 tops; Return tank 15 middle parts arrange two-layer porous plate 13, and the bottom is provided with inlet mouth 23, aerating system 24, and water outlet 25, wherein aerating system 24 is comprised of four aeration plates 20; Respectively implant one group of (or many groups) electrode pair 6 in upper and lower packing layer 5,14, with special rubber ring 7 sealings, electrode links to each other with D.C. regulated power supply.
Filler is mixed by the gac of 60～80 order sponge iron and close order number, and its volume ratio is 0.5～2: 1, and in servicely guarantee that it is in suspended state all the time.
The packing tower water outlet is back to packing tower bottom water inlet system after the further oxidation of return tank; Pending waste water enters packing tower 12 by packing tower bottom water-in 17; behind floating stuffing layer 5,14, flow into water outlet 2 by overflow weir 1; and enter return tank 15 by return tank top water-in 3; partially liq in the return tank is discharged from return tank top water outlet 4; all the other liquid are back to packing tower 12 by return tank bottom water outlet 25 and realize circular treatment under water pump 26 promotes, common quantity of reflux is 20～200 times of flooding velocity.
Aerating system is installed in the packing tower bottom, and aeration intensity is 0.16～1.6m
3/ h.
The inner electrolyser additional electric field is implanted packing layer with electrode pair, and applying volts DS is 3～36V.
Electrode pair adopts the materials such as carbon rod, charcoal cloth, iron staff, aluminium bar.
For the treatment of percolate, petrochemical wastewater, electroplating technology waste water and dyeing waste water etc.
Concrete operation method is: referring to accompanying drawing 1, the bottom of packing tower 12 is provided with evacuation port 18, is used for equipment blowdown or emptying; Gas enters packing tower aerating system 21 by bottom air inlet 22, realizes uniform aeration under the effect of aeration plate 20; Waste water enters water distribution layer 16 from bottom water-in 17, waste water and gas are after water distribution layer is fully mixed, air-water mixture enters floating stuffing layer 5,14 by porous plate 10 and reacts, utilize porous plate to realize the even diffusion of aqueous vapor in filler, prevented the channel generation, while place mat one deck small-bore screen cloth 9 above porous plate is in case filler runs off; Waste water enters water outlet 2 from overflow weir 1 behind floating stuffing layer 5,14, injects return tank 15 in the run by gravity mode; Enter aerating system 24 at return tank 15 interior gases by bottom air inlet 23, under aeration plate 20 effects, realize uniform aeration, in conjunction with porous plate 13 shunting actions, the interior waste water of return tank is mixed fully, wherein part waste water is through water outlet 4 dischargings, all the other waste water are by bottom phegma outlet 25, return to finish circulation in the packing tower and process under water pump 26 promotes.
The present invention compared with prior art highlights following advantage:
(1) additional electric field reinforced circulating type inner electrolyser guarantees that by the synergy of circulating water flow and aeration filler is in suspended state all the time, because of the lasting shearing effect of current, has reduced pollutent and has accumulated in filler simultaneously, has alleviated and has hardened;
(2) additional electric field reinforced circulating type inner electrolyser is selected the sponge iron that is polynuclear plane to substitute traditional cast iron filing and is made iron charge, has effectively slowed down passivation;
(3) additional electric field reinforced circulating type inner electrolyser is implanted into electrode at packing layer, has accelerated the mobility of electronics between iron and charcoal, has improved galvanic cell redox reaction speed, has strengthened the ability of inner electrolyser processing trade effluent;
(4) additional electric field reinforced circulating type inner electrolyser can significantly be removed organic pollutant, improve the biodegradability of trade effluent.
Description of drawings
Fig. 1 is the structural representation of facing of the present invention;
Fig. 2 is packing tower of the present invention bottom aerating system plan structure synoptic diagram;
Fig. 3 is return tank of the present invention bottom aerating system plan structure synoptic diagram;
1-effluent weir among the figure; The 2-overflow port; 3-top water-in; The 4-water outlet; 5-upper strata filler; The 6-electrode pair; The special rubber ring of 7-; The 8-discharge opening; The 9-nylon screen; 10-packing tower porous plate; The 11-charging bole; The 12-packing tower; 13-return tank porous plate; 14-lower floor filler; The 15-return tank; The 16-water distribution layer; The 17-water-in; The 18-evacuation port; 19-phegma entrance; The 20-aeration plate; 21-packing tower aerating system; 22-packing tower inlet mouth; 23-return tank inlet mouth; 24-return tank aerating system; The outlet of 25-phegma; The 26-water pump.
Embodiment
The efficient coupling of additional electric field and internal electrolysis has ideally been realized the design concept of reinforced circulating type inner electrolyser, highlights advantage in its function, and the work that has surmounted traditional interior electrolysis reactor is renderd a service.The below enumerates 2 embodiment the present invention is further specified, but the present invention is not limited only to this.
Embodiment 1:
Utilize the reinforced circulating type inner electrolyser to process certain sewage reservoir bed mud leachate, this wastewater characteristics is: outward appearance deep yellow, about 1000 extension rates of colourity; COD=1200～1500mg/L; BOD
5/ COD=0.05～0.07; PH=5～6; SS=500～700mg/L; TDS=1700～1800mg/L; Cl-=7485-7615mg/L, specific conductivity=18000～19000 μ s/cm.Electrolysis reactor in the tradition (without circulation, be the iron filler without auxiliary voltage, cast iron filing) and additional electric field reinforced circulating type inner electrolyser (pump around circuit, auxiliary voltage, sponge iron filler) move 12 hours under the same conditions, and the COD clearance is respectively 21% and 55%; Chroma removal rate is respectively 60% and 90%; BOD
5/ COD is increased to respectively 0.26 and 0.42 (but waste water biochemical condition: BOD
5/ COD is more than or equal to 0.4).Moving 30 days continuously, electrolysis reactor iron/carbon filling material highlights and hardens in the tradition, and effluent quality worsens; And additional electric field reinforced circulating type inner electrolyser iron/carbon filling material is without hardening phenomenon, and stable effluent quality.
Embodiment 2:
Utilize the reinforced circulating type inner electrolyser to process Xylene Red 333 waste water from dyestuff, this wastewater characteristics is: outward appearance is scarlet, about 2000 extension rates of colourity; COD=1200～1500mg/L; BOD
5/ COD=0.12～0.18; SS=0.38～0.44g/L; PH=5.5～7.5; Electrolysis reactor and additional electric field reinforced circulating type inner electrolyser move 5 hours under the same conditions in the tradition, and the COD clearance is respectively 30% and 75%, BOD
5/ COD is increased to respectively 0.20 and 0.52; Chroma removal rate can reach respectively 50% and 90%; Operation is 15 days continuously, and the electrolysis reactor effluent quality fluctuation occurs, is degradating trend in the tradition, and the effluent quality of additional electric field reinforced circulating type inner electrolyser keeps stable.
This shows, additional electric field reinforced circulating type inner electrolyser of the present invention, compare and not only have stronger wastewater treatment ability with electrolysis reactor in the tradition, and can delay that filler hardens and the iron charge passivation, show wide application prospect as a novel New Wastewater Treatment Technique.
Claims (7)
1. additional electric field reinforced circulating type inner electrolyser, it is characterized in that: in the bottom of packing tower 12, if water-in 17, evacuation port 18, phegma entrance 19, inlet mouth 22, water distribution layer 16 and gas distribution system 21, wherein gas distribution system 21 is comprised of six aeration plates 20; At the middle part of packing tower 12, load upper and lower two-layer filler 5,14, its side is provided with discharge opening 8, and charging bole 11 is established in lower floor's filler 14 sides, and porous plate 10 and screen cloth 9 are all installed in two-layer filler 5,14 bottoms; Annular overflow weir 1 and water outlet 2 are established in the top of packing tower 12; Water-in 3 and water outlet 4 are established in return tank 15 tops; Return tank 15 middle parts arrange two-layer porous plate 13, and the bottom is provided with inlet mouth 23, aerating system 24, and water outlet 25, wherein aerating system 24 is comprised of four aeration plates 20; Respectively implant one group of (or many groups) electrode pair 6 in upper and lower packing layer 5,14, with special rubber ring 7 sealings, electrode links to each other with D.C. regulated power supply.
2. additional electric field reinforced circulating type inner electrolyser according to claim 1, it is characterized in that: filler is mixed by the gac of 60～80 order sponge iron and close order number, and its volume ratio is 0.5～2: 1, and in servicely guarantee that it is in suspended state all the time.
3. additional electric field reinforced circulating type inner electrolyser according to claim 1 is characterized in that: the packing tower water outlet flows into packing tower bottom water inlet system after the further oxidation of return tank; Pending waste water enters packing tower 12 by packing tower bottom water-in 17; behind floating stuffing layer 5,14, flow into water outlet 2 by overflow weir 1; and enter return tank 15 from return tank top water-in 3; partially liq in the return tank is discharged from return tank top water outlet 4; all the other liquid return packing tower 12 from return tank bottom water outlet 25 and realize circular treatment under water pump 26 promotes, common quantity of reflux is 20～200 times of total flooding velocity.
4. additional electric field reinforced circulating type inner electrolyser according to claim 1 is characterized in that: aerating system is installed in the packing tower bottom, and aeration intensity is 1.6～36m
3/ h.
5. additional electric field reinforced circulating type inner electrolyser according to claim 1 is characterized in that: the inner electrolyser additional electric field is about to electrode pair and implants packing layer, and applies volts DS 3～36V.
6. additional electric field reinforced circulating type inner electrolyser according to claim 5, it is characterized in that: this electrode pair can be selected the materials such as carbon-point, carbon cloth, iron staff, aluminium bar.
7. additional electric field reinforced circulating type inner electrolyser according to claim 1 is characterized in that: can be used for treating refuse percolate, petrochemical wastewater, electroplating technology waste water and dyeing waste water etc.
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Cited By (3)
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| CN105036294A (en) * | 2015-08-18 | 2015-11-11 | 江苏南大环保科技有限公司 | Novel filler tower capable of improving utilization efficiency of gas |
| CN106746052A (en) * | 2017-01-14 | 2017-05-31 | 甘肃新天亿环保工程有限公司 | A kind of reverse-flow type iron-carbon micro-electrolysis couple Fenton treatment reaction devices |
| CN110015723A (en) * | 2019-05-08 | 2019-07-16 | 山西大学 | A kind of catalysis reaction apparatus for waste water treatment |
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| CN106746052A (en) * | 2017-01-14 | 2017-05-31 | 甘肃新天亿环保工程有限公司 | A kind of reverse-flow type iron-carbon micro-electrolysis couple Fenton treatment reaction devices |
| CN110015723A (en) * | 2019-05-08 | 2019-07-16 | 山西大学 | A kind of catalysis reaction apparatus for waste water treatment |
| CN110015723B (en) * | 2019-05-08 | 2021-09-28 | 山西大学 | Catalytic wastewater treatment reaction device |
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Application publication date: 20130424 |