CN201520663U - Diaphragm-free electrochemical wastewater treatment plant - Google Patents
Diaphragm-free electrochemical wastewater treatment plant Download PDFInfo
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- CN201520663U CN201520663U CN2009202357569U CN200920235756U CN201520663U CN 201520663 U CN201520663 U CN 201520663U CN 2009202357569 U CN2009202357569 U CN 2009202357569U CN 200920235756 U CN200920235756 U CN 200920235756U CN 201520663 U CN201520663 U CN 201520663U
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- waste water
- electrode
- guide pipe
- baffle plate
- treatment device
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Abstract
The utility model relates to a diaphragm-free electrochemical wastewater treatment plant comprising an electrode reactor. The electrode reactor is internally provided with a wastewater guide pipe, an anode electrode, a cathode feed electrode and a metal large-grain gathering device, wherein a wastewater inlet is arranged at the bottom of the electrode reactor; the wastewater guide pipe is longitudinally arranged above the wastewater inlet and a space exists between the lower end of the wastewater guide pipe and the wastewater inlet; additionally, the upper end of the wastewater guide pipe is provided with an anode protection baffle plate; the anode electrode is arranged on the outer wall of the wastewater guide pipe; the cathode feed electrode is arranged at the bottom of the electrode reactor; additionally, the electrode reactor is provided with a feeding device; and the metal large-grain gathering device is positioned below the anode protection baffle plate. Therefore, the wastewater treatment plant can effectively maintain that the grains inside the electrode reactor are in a flowing state, and simultaneously prevent the metal grains from entering an anode reaction area and dividing the anode reaction area into two reaction areas, a cathode electrode reaction area and an anode electrode reaction area, without using diaphragms, thus thoroughly solving various problems caused by using the diaphragms.
Description
Technical field
The utility model relates to a kind of wastewater treatment equipment, especially a kind of can the high efficiente callback trade effluent in the non-diaphragm electrochemical waste water treatment device of metal.
Background technology
China's production prosperity, the quantity discharged of trade effluent occupies first of the whole world.Usually contain a large amount of metal ions in the trade effluent (as trade effluents such as plating, printing and dyeing, process hides), as copper, zinc, chromium, cadmium, lead etc.These metal ions are to environment and human very harmful, in discharging or again before the reuse, must carry out strict purifying treatment.Meanwhile, the recovery value of these metal ions is generally all higher, so, be necessary very much development of new resource utilization retrieving arrangement and method efficiently.
At present, process for treating industrial waste water mainly can be divided into four big classes: physics method, chemical method, biological process and physico-chemical processes.The physics method comprises that mainly the suspended state pollution substance separates (as removing degrease), evaporation concentration etc., and these methods are generally just as a link in other treatment processs.Chemical method is a current application method the most widely, it mainly is by add corresponding chemical agent in waste water, by chemical reaction pollutent is become harmless or hypotoxic material (as adding the hypochlorite oxidation cryanide ion, adding ferrous sulfate and hexavalent chrome reduction is become the less trivalent chromium of toxicity etc.), perhaps it is become easily with the isolating material of sewage after adopt physical method to remove (separating after with heavy metal precipitations such as copper, cadmium, chromium, lead) as adding yellow soda ash.This method is simple to operate, the facility investment expense is low, comparatively stable to the removal effect of high density pollution thing, but after Pollutant levels are reduced to a certain degree, the effect of further removing pollutent is very limited, in addition, also there is serious secondary pollution problem (as producing a large amount of poisonous and harmful mud, may introducing new pollutent etc.) in this method, and the resource utilization weak effect is difficult to satisfy the emission request of increasingly stringent.Biological process is a vital movement process of utilizing microorganism, pollutants in waste water is shifted or transforms, as available decolouring bacillus anaerobic treatment chromate waste water, add active sludge treatment chromate waste water etc. with pseudomonas, but this method only limits to single bacterial strain and handles single pollutent, and it is very big disturbed by other pollutents, and decontamination effect improving is very unstable.Physico-chemical processes is the method that waste water is purified by physics and chemical comprehensive action, (ion in the resin and the heavy metal ion in the waste water are exchanged as ion exchange method, shortcoming is only effective to some ion, polluted easily, investment running cost height, and be difficult to realize resource utilization), active carbon adsorption (mainly utilizes the hole absorb polluted matter of activated carbon prosperity, shortcoming is that the activated carbon consumption is big, the regeneration techniques complexity, the running cost height is difficult to realize resource utilization), electrochemical process etc.
Electrochemical process does not need to add any chemical agent, and flexible operation, flow process are simple, can not produce secondary pollution (as mud etc.), can directly reclaim the higher metal of economic worth (as copper, zinc etc.), so the electrochemical treatment method is known as the clean method again.Current electrochemical reaction appts mainly is divided into two kinds of plate electrode reactor and electrode reactors.The yin, yang electrode of plate electrode reactor is parallel flat board arranged in pairs, and in this device operational process, the pollutent concentration polarization is big, and current density is little (general can only to reach 200～300A/m at most
3), current efficiency low (the highest have only 40～65%).Electrode reactor is a chemical cell that yin, yang the two poles of the earth is separated by barrier film, in a half-cell (cathodic reaction zone), insert feeding electrode, add conductive particle (metallic particles again, and it is identical) with the metal types of intending reclaiming, the bottom is provided with liquid distributing board, impels the particle in the reaction zone to be fluidized state, forms the fluidization electrode.Between the cathodic reaction zone endoparticle and and feeding electrode between collision frequent, impel particle charged; The fluidization campaign of particle in cathodic reaction zone be accelerating liquid and intergranular rate of mass transfer greatly, and the concentration polarization of metal ion is reduced greatly, the current density of electrochemical reaction can be brought up to 1500～2500A/m
3, current efficiency is increased to more than 60～90%, and equipment volume greatly reduces, be particularly suitable for handling the lower waste water of concentration of metal ions.
In the electrode reactor of having developed at present, barrier film (a kind of semipermeable partition) is one of its requisite key component.The ideal diaphragm material must possess following condition: (1) possesses moderate osmotic pressure, and can not be too big (needing to guarantee that the yin, yang ion can see through smoothly) again can not too little (enter the people positive column down to the liquid major part, influence the normal fluidisation of particle negative electrode); (2) have very high physical strength and wear resistance, prevent to cause breakage because metallic particles frequently clashes into barrier film; (3) have good chemical stability, prevent acid and alkali corrosion; (4) has less resistivity, to cut down the consumption of energy; (5) have slick surface, prevent that conductive particle is in surface detention, assembly and adhesion.But comparatively ideal diaphragm material (as the precious metal-based permeable membrane) selling at exorbitant prices is difficult to apply.Usually the diaphragm material (as glass fibre, plastics etc.) that adopts is again usually because the wearing and tearing splintering problem influences safe, continuous, the steady running of device.
Under the situation of the ideal diaphragm material that is difficult in present technology to provide cheap, need not membranous fluidization electrode reaction device and the metal recovery processes of development of new are to improve that China's trade effluent is innoxious, the effective way of resource utilization level.
The utility model content
The utility model is at the deficiencies in the prior art, a kind of non-diaphragm electrochemical waste water treatment device is provided, by adopting the fluidization electrode reactor of spouted bed with draft tube structure, and the internals of preferred arrangement electrode reactor, need not to use under the membranous situation, be separated out two electrode reaction districts of yin, yang, so thoroughly solve because the variety of issue that uses barrier film to bring, guarantee safe, continuous, stable, the efficient operation of electrochemical reaction appts, greatly reduced the investment and the running cost of apparatus for electrochemical treatment.
For realizing above technical purpose, the utility model will adopt following technical scheme:
A kind of non-diaphragm electrochemical waste water treatment device; comprise electrode reactor; described electrode reactor is provided with the waste water admission port; treated water outlet and cathode reaction gas relief outlet; and the waste water guide pipe is installed in this electrode reactor; anode electrode; the cathode feed utmost point and metal macrobead collection device; described waste water admission port is arranged at the bottom of electrode reactor; the waste water guide pipe is vertically installed in this waste water admission port top; and there is spacing between waste water guide pipe lower end and the waste water admission port; the upper end of waste water guide pipe is equipped with the anodic protection baffle plate in addition; described anode electrode is arranged on the outer wall of waste water guide pipe with certain interval; the cathode feed utmost point then is arranged at the electrode reactor bottom; near near the extremely electrode reactor of cathode feed feeding device being installed, described metal macrobead collection device is positioned at anodic protection baffle plate below in addition.
Described anodic protection baffle plate tilts at a certain angle and down is connected on the waste water guide pipe.
Be connected with flow deflector on the described anodic protection baffle plate, and be connected with the size particles separating nozzle that current can upwards spray on the anodic protection baffle plate.
The collection basket that described metal macrobead collection device is provided with for the middle part breach, this collection basket place the flow deflector below.
In the described metal macrobead collection device pay-off that is used to carry the macrobead metal is installed.
The outward flange of described collection basket is provided with small-particle and collects baffle plate.
Described anode electrode comprises the anode electrode support and is installed in anode network on the anode electrode support.
Described anode electrode support in a tubular form, and the body of this sheath electrode suppor is provided with the anode electrode washing nozzle.
Described electrode reactor bottom is tapered, and the waste water admission port is arranged at the minimum position of this electrode reactor conical lower portion
Electrode reactor inwall near treated water outlet is equipped with the spill plate that prevents that metallic particles from overflowing obliquely.
According to above technical scheme, can realize following beneficial effect:
1. the utility model is vertically installed the waste water guide pipe above the waste water admission port in electrode reactor, outer wall at the waste water guide pipe is provided with anode electrode, and at waste water guide pipe upper end connection anodic protection baffle plate, and at the electrode reactor bottom installation cathode feed utmost point, thereby the particle that can keep effectively in the electrode reactor is in fluidization, avoid metallic particles to enter the anodic reaction zone simultaneously, need not to use under the membranous situation, be separated out two electrode reaction districts of yin, yang, so thoroughly solve because the variety of issue that uses barrier film to bring;
2. arrange the size particles separating nozzle at the afterbody of anodic protection baffle plate, by spraying the waste water of reuse, select suitable spray angle and speed, size particles is separated, then the macrobead quality is heavy, inertia is big, be subjected to the jet efflux of size particles separating nozzle little, can drop in the nearer metal macrobead collection device, utilize e Foerderanlage that it is sent then and carry out recycling, this design has guaranteed the continuous operation of system, prevents from that particle from looking excessive to cause that fluidized state worsens after;
3. by angle and space between reasonable Arrangement small-particle collection baffle plate and electrode reactor limit wall, guaranteeing that the small-particle metal arrives negative plate smoothly, enter the waste water guide pipe behind the acquisition negative charge and carry out cathodic reaction, liquid motion in the leading electrode reactor simultaneously, reduce concentration polarization, improve rate of mass transfer and current efficiency;
4. metal device can be realized safety, continuous, stable, efficient operation in the spouted bed electrode high efficiente callback of the no barrier film trade effluent that the utility model proposed, current efficiency 70～95%, metal ion clearance 85～98%, the metal ion rate of recovery reaches 80～95%, greatly reduce the investment and the running cost of apparatus for electrochemical treatment, realized the innoxious and resource utilization of waste water.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Explain the technical solution of the utility model below with reference to accompanying drawing.
Non-diaphragm electrochemical method of wastewater treatment described in the utility model; it introduces electrode reactor with pending waste water; and make the particle in this pending waste water be in fluidization; by the anodic protection baffle plate that the waste water guide pipe is set and is installed in waste water guide pipe upper end; make that the electrode reactor internal separation is relatively independent cathodic reaction zone and anodic reaction zone; the fluidised form bed material that the input electrode reactor is required, thus realize the recovery of the metallic particles of fluidised form bed material correspondence in the pending waste water.
For realizing above-mentioned method of wastewater treatment; the utility model provides a kind of non-diaphragm electrochemical waste water treatment device; as shown in Figure 1; non-diaphragm electrochemical waste water treatment device described in the utility model; comprise electrode reactor; described electrode reactor is provided with waste water admission port 1; treated water outlet 9 and cathode reaction gas relief outlet 11; and waste water guide pipe 21 is installed in this electrode reactor; anode electrode; the cathode feed utmost point and metal macrobead collection device 19; described waste water admission port 1 is arranged at the bottom of electrode reactor; and electrode reactor described in the utility model bottom is tapered; waste water admission port 1 is arranged at the minimum position of this electrode reactor conical lower portion; waste water guide pipe 21 is vertically installed in this waste water admission port 1 top; there is spacing between described waste water guide pipe 21 lower ends and the waste water admission port 1; the upper end of waste water guide pipe 21 is equipped with anodic protection baffle plate 8 in addition; and this anodic protection baffle plate 8 tilts down to be connected on the waste water guide pipe 21 at a certain angle; be connected with flow deflector on the described anodic protection baffle plate 8; and can upwards spray with the isolating nozzle 14 of size particles near being connected with current near the anodic protection baffle plate 8 this flow deflector; for making separating effect better; the utility model is arranged at nozzle 14 afterbody of anodic protection baffle plate 8; described anode electrode is arranged on the outer wall of waste water guide pipe 21 with certain interval; this anode electrode comprises anode electrode support 17 and is installed in anode network 7 on the anode electrode support 17; and anode electrode support 17 in a tubular form; the body of this sheath electrode suppor 17 is provided with anode electrode washing nozzle 18; the cathode feed utmost point then is arranged at the electrode reactor bottom; the cathode feed utmost point described in the utility model adopts negative plate 2; it is laid on the electrode reactor bottom; in addition near near the extremely electrode reactor of cathode feed feeding device 5 being installed; feeding device 5 described in the utility model is a screw feeder; described metal macrobead collection device 19 is positioned at anodic protection baffle plate 8 belows; the collection basket that metal macrobead collection device 19 is provided with for the middle part breach; this collection basket places the flow deflector below; and the outward flange of described collection basket is provided with small-particle and collects baffle plate; in the metal macrobead collection device 19 pay-off 20 that is used to carry the macrobead metal is installed in addition, pay-off 20 described in the utility model is selected worm conveyor for use.
For avoiding metallic particles along with the outflow electrode reactor of purifying waste water, the utility model is equipped with the spill plate 12 that prevents that metallic particles from overflowing obliquely at the electrode reactor inwall near treated water outlet 9.For ease of maintenance, the utility model electrode reactor is provided with maintenance inlet 10, and on this maintenance inlet 10 flange is installed.
During use, to contain recoverable metal ionic trade effluent and enter electrode reactor, flow velocity 1～10m/s, waste water that sprays into and the small-particle metal that carries negative charge by the waste water admission port 1 that the electrode reactor bottom is provided with, enter waste water guide pipe 21, and finally in waste water guide pipe 21, spray, in this process, the metal ion in the waste water combines with negative charge, be reduced into metal simple-substance, be adsorbed on the surface of metal particles, metallic particles is grown up gradually, and reactional equation as the formula (1).Scatter towards periphery from the metallic particles of guide pipe ejection, because blocking of anodic protection baffle plate 8 can not fall in the anodic reaction zone.Because waste water guide pipe 21 outer flow rate of liquid reduce greatly, metallic particles can move downward under action of gravity.When metallic particles is deposited to anodic protection baffle plate 8 tail ends downwards; size particles separating nozzle 14 ejection flow velocity 0.3～1m/s purify waste water; because the metallic particles quality of having grown up is bigger; to spray the influence of current less; sedimentation is very fast; can fall into nearer macrobead metal and collect basket, send electrochemical reaction appts by worm conveyor.A macrobead metal part again as new fluidized bed material, is sent into the electrode reactor bottom through screw feeder after can being rolled over and being broken into small-particle; Another part is with regard to recyclable utilization.The small-particle metal is owing to be subjected to the influence of size particles separating nozzle 14 ejection current bigger, can move to farther place (more near the electrochemical reactor edge) back sedimentation, falling into small-particle collects on the guide baffle plate, fall into along reactor limit wall on the negative plate 2 of reactor bottom, on negative plate 2, move down and obtain negative charge in the process, when moving down into spouted bed ingress, the current that entered the mouth are brought waste water guide pipe 21 into, with the metal ion generation anodic reaction in the waste water.Waste water after the purification is discharged from treated water outlet 9, because the outlet arranged in front prevents that particle from overflowing baffle plate, can prevent that metallic particles is along with current overflow.The main electrochemical reaction that takes place is shown in reaction equation (1) in reaction cathodic area (mainly referring to spouted guide pipe interior region), and side reaction is shown in equation (2), and the main gas in this process is hydrogen.Main electrochemical reaction in the anodic reaction district is shown in equation (3), and the by product of the generation in the process is a carbonic acid gas, also contains a spot of oxygen and carbon monoxide.The gas that produces in the electrochemical reaction process is discharged from anode reaction gas relief outlet and cathode reaction gas relief outlet 11 respectively.
Cathodic reaction zone principal reaction equation:
M
N++ ne → M M is metal or metal ion (1)
Cathodic reaction zone side reaction equation:
2H
++ e → H
2H
2Be hydrogen (2)
Anodic reaction district principal reaction equation:
aH
2O-ae+cC
xH
yO
z→aH++cCO
2+dCO+eH
2O+fO
2
Wherein, C
xH
yO
zBe the organism in the waste water (3)
Claims (10)
1. non-diaphragm electrochemical waste water treatment device; comprise electrode reactor; described electrode reactor is provided with the waste water admission port; treated water outlet and cathode reaction gas relief outlet; it is characterized in that; the waste water guide pipe is installed in the described electrode reactor; anode electrode; the cathode feed utmost point and metal macrobead collection device; described waste water admission port is arranged at the electrode reactor bottom; the waste water guide pipe is vertically installed in this waste water admission port top; and there is spacing between waste water guide pipe lower end and the waste water admission port; the upper end of waste water guide pipe is equipped with the anodic protection baffle plate in addition; described anode electrode is arranged on the outer wall of waste water guide pipe with certain interval; the cathode feed utmost point then is arranged at the electrode reactor bottom; near near the extremely electrode reactor of cathode feed feeding device being installed, described metal macrobead collection device is positioned at anodic protection baffle plate below in addition.
2. non-diaphragm electrochemical waste water treatment device according to claim 1 is characterized in that, described anodic protection baffle plate tilts at a certain angle and down is connected on the waste water guide pipe.
3. non-diaphragm electrochemical waste water treatment device according to claim 1 and 2 is characterized in that, is connected with flow deflector on the described anodic protection baffle plate, and be connected with on the anodic protection baffle plate that current can upwards spray with the isolating nozzle of size particles.
4. non-diaphragm electrochemical waste water treatment device according to claim 3 is characterized in that, the collection basket that described metal macrobead collection device is provided with for the middle part breach, this collection basket place the flow deflector below.
5. non-diaphragm electrochemical waste water treatment device according to claim 3 is characterized in that, in the described metal macrobead collection device pay-off that is used to carry the macrobead metal is installed.
6. non-diaphragm electrochemical waste water treatment device according to claim 4 is characterized in that, the outward flange of described collection basket is provided with small-particle and collects baffle plate.
7. non-diaphragm electrochemical waste water treatment device according to claim 1 is characterized in that, described anode electrode comprises the anode electrode support and is installed in anode network on the anode electrode support.
8. non-diaphragm electrochemical waste water treatment device according to claim 1 is characterized in that, described anode electrode support in a tubular form, and the body of this sheath electrode suppor is provided with the anode electrode washing nozzle.
9. non-diaphragm electrochemical waste water treatment device according to claim 1 is characterized in that, described electrode reactor bottom is tapered, and the waste water admission port is arranged at the minimum position of this electrode reactor conical lower portion.
10. non-diaphragm electrochemical waste water treatment device according to claim 1 is characterized in that, the electrode reactor inwall of close treated water outlet is equipped with the spill plate that prevents that metallic particles from overflowing obliquely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202357569U CN201520663U (en) | 2009-09-27 | 2009-09-27 | Diaphragm-free electrochemical wastewater treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202357569U CN201520663U (en) | 2009-09-27 | 2009-09-27 | Diaphragm-free electrochemical wastewater treatment plant |
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| Publication Number | Publication Date |
|---|---|
| CN201520663U true CN201520663U (en) | 2010-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202357569U Expired - Lifetime CN201520663U (en) | 2009-09-27 | 2009-09-27 | Diaphragm-free electrochemical wastewater treatment plant |
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| CN (1) | CN201520663U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671066B (en) * | 2009-09-27 | 2011-09-07 | 东南大学 | Non-diaphragm electrochemical waste water treatment device |
-
2009
- 2009-09-27 CN CN2009202357569U patent/CN201520663U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671066B (en) * | 2009-09-27 | 2011-09-07 | 东南大学 | Non-diaphragm electrochemical waste water treatment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100707 Effective date of abandoning: 20090927 |