CN205420014U - Current collection is separated, chromium -containing wastewater processing apparatus of redox , sediment integration - Google Patents
Current collection is separated, chromium -containing wastewater processing apparatus of redox , sediment integration Download PDFInfo
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- CN205420014U CN205420014U CN201520930958.0U CN201520930958U CN205420014U CN 205420014 U CN205420014 U CN 205420014U CN 201520930958 U CN201520930958 U CN 201520930958U CN 205420014 U CN205420014 U CN 205420014U
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Abstract
The utility model discloses a current collection is separated, chromium -containing wastewater processing apparatus of redox, sediment integration, include electrolysis dominant reaction pond and set up sedimentation tank and the clean water basin in electrolysis dominant reaction pond one side side by side, electrolysis dominant reaction pond includes negative plate, anode plate, cloudy anode connection end, packing layer, negative plate and anode plate pass through the recess and fix both ends about electrolysis dominant reaction pond, are equipped with saliniferous packing layer, the fixed positive centre of placing electrolysis dominant reaction pond in of gauze for the packing layer in the middle of negative plate and the anode plate. The utility model is simple in operation, the treatment effeciency is high, and the equipment investment is low, and the running cost is low.
Description
Technical field
This utility model relates to technical field of waste water processing, is specifically related to a kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral.
Background technology
In chromate waste water, the existence form of chromium typically has Cr (VI) and Cr (III) two kinds, and wherein the toxicity of Cr (VI) is maximum.Cr (VI) mainly exists with two kinds of forms of CrO42-and Cr2O72-, and in acid condition, Cr (VI) mainly exists with Cr2O72-form, then exists with CrO42-form under the conditions of alkalescence.The processing method of chromate waste water is more, the most conventional electrolysis, chemical method and the ion exchange etc. having.Wherein, chemical method needs to add pharmacy response and easily causes secondary pollution, and ion exchange is to utilize high molecular synthetic resin to carry out ion exchange with chromium in waste water, and it is relatively costly, and operation management is complicated, and resin regeneration difficulty is short for service life.Electrolytic reduction because of its have that volume is little, take up an area less, power consumption is low, convenient management, the feature such as effective are widely used.
Electrolytic Theatment of Chrome Containing Wastewater is one of study hotspot of water pollution control in recent years, its principle is to utilize iron plate to make anode, electrolytic process Anodic occur oxidation reaction generate ferrous ion, in acid condition, hexavalent chromium is reduced into trivalent chromic ion by ferrous ion, and ferrous ion is oxidized to ferric ion.Simultaneously because separate out hydrogen generation OH-with Cr3+, Fe3+ on negative electrode to react formation hydroxide Precipitation, carry out mud-water separation finally by precipitation or pneumatically supported mode, reach the purpose of purification of waste water.
Electrolytic Theatment of Chrome Containing Wastewater mechanism: (1) cell reaction: negative electrode: O2+2H2O+4e=4OH-, anode: Fe-2e=Fe2+；(2) redox reaction；Cr2O72+6Fe2++14H+=2Cr3++6Fe3++7H2O；(3) precipitation: Cr3++3OH-=Cr (OH) 3, Fe3++3OH-=Fe (OH) 3；From reaction equation, the reduction of Cr (VI) is typically carried out in sour environment, and Cr3+ and Fe3+ typically precipitates under alkaline environment, and major part needs outer acid adding to adjust pH for acid at reduction phase in the technology of existing electrochemical treatments chromate waste water, also needing separately to add alkali in follow-up precipitation process, this process needs to expend substantial amounts of soda acid simultaneously；Additionally used electrochemical appliance electrolysis oxidation-reduction precipitation is substantially all to carry out in same reactor at present, and course of reaction is wayward.
Utility model content
The purpose of this utility model is the shortcoming and defect in order to overcome prior art, it is provided that simple to operate, and treatment effeciency is high, and equipment investment is low, a kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral that operating cost is low.
A kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral, the sedimentation tank including electrolysis primary response pond and being disposed in parallel in electrolysis side, primary response pond and clear water reserviors；Described electrolysis primary response pond includes minus plate, positive plate, anode and cathode terminals, packing layer；Described minus plate and positive plate are fixed on the two ends, left and right in electrolysis primary response pond by groove, are provided with the packing layer of saliferous in the middle of minus plate and positive plate, and described packing layer gauze fixes the middle being placed in electrolysis primary response pond；Lower-left, described electrolysis primary response pond end is provided with water inlet, its upper right side is provided with water inlet described in electrolyte outlet and electrolyte outlet and is all connected with electrolysis primary response pond by being provided with the pipeline of flange, and the anode region in described electrolysis primary response pond is provided with electrolyte outlet and is connected with sedimentation tank upper end by being provided with the pipeline of flange；The cathode chamber in described electrolysis primary response pond is connected with sedimentation tank lower end water inlet by water circulating pump；Described sedimentation tank left upper end sets overfall, and described clear water reserviors left upper end is provided with outlet；Described sedimentation tank is mixed by the upper end electrolyte come in cathode chamber of water inlet and carries out precipitation, and supernatant is from the overfall overflow entrance clear water reserviors of sedimentation tank left upper end.
Preferably, described positive plate is iron plate or aluminium sheet, and described minus plate is graphite cake, corrosion resistant plate or inert electrode, and minus plate and positive plate are equipped with the aperture that can cross water.
Preferably, described packing layer is a kind of or any several mixing in clay, kieselguhr and flyash, is added with NaCl or KCl in packing layer.
Preferably, the pipeline that the anode region of described electrolyzer is connected with sedimentation tank upper end water inlet is bend pipe.
Spun yarn net is set at described overfall.
Described sedimentation tank is 1～3: 1 with the pond appearance ratio of clear water reserviors.
Work process: pending chromate waste water enters cell reaction pond from lower-left end, there is redox reaction in the Fe2+ being electrolysed out in anode chamber with positive plate, generates Fe3+ and Cr3+, then enter precipitation pond from the upper right side Discharging bent-tube of electrolyzer；Owing to occurring cell reaction can produce OH-on minus plate, cause the solution alkaline of cathode chamber, with water circulating pump, the alkaline solution of cathode chamber is pumped into from the lower end in precipitation pond, mix with the solution adverse current of anode chamber, generation Cr (OH) 3 and Fe (OH) 3 that reacts sinks at the bottom of pond, supernatant enters into clear water reserviors by the overfall of the upper end of sedimentation tank, further precipitation fritter flco, and the clear water after process is discharged from upper end, pond.
The beneficial effects of the utility model:
1. this utility model is respectively provided with cell reaction pond and sedimentation tank, carries out in making the electrolysis oxidation-reduction reaction region different at two respectively from precipitation；Additionally also negative electrode is separated with anode packing layer in electrolyzer, the cell reaction making anode and cathode is carried out respectively, the alkaline solution that cathode chamber produces is mainly in cathode chamber, and the Fe2+ that anode region produces, mainly in anode chamber, has been effectively promoted the carrying out of redox reaction；Alkaline solution in cathode chamber and the reactant liquor in anode chamber are entered in sedimentation tank with entrance by different outlets simultaneously and mix, add mass transfer effect, accelerate the carrying out of precipitation, without the need for additional alkali source, it is effectively controlled processing cost, it is to avoid secondary pollution；
2. can be specifically designed for the process of chromate waste water, also can effectively remove other heavy metal ion in waste water simultaneously, it is simple to operate, and treatment effeciency is high, and equipment investment is low, and operating cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In accompanying drawing: 11, electrolysis primary response pond, 111, water inlet, 112, electrolyte outlet, 113, packing layer, 12, sedimentation tank, 121, overfall, 122, sedimentation tank water inlet, 13, clear water reserviors, 131, outlet, 201, minus plate, 202, positive plate, 31, water circulating pump.
Detailed description of the invention
Below in conjunction with embodiment, detailed description of the invention of the present utility model is described in further detail:
As it is shown in figure 1, a kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral, the sedimentation tank 12 including electrolysis primary response pond 11 and being disposed in parallel in electrolysis side, primary response pond 111 and clear water reserviors 13；Sedimentation tank 12 is 2: 1 with the pond appearance ratio of clear water reserviors 13；
Electrolysis primary response pond 11 includes minus plate 201, positive plate 202, anode and cathode terminals, packing layer 113；Minus plate 201 and positive plate 202 are fixed on the two ends, left and right in electrolysis primary response pond 11 by groove, and minus plate 201 packing layer 113 that set saliferous middle with positive plate 202, packing layer 113 fixes the middle being placed in electrolysis primary response pond 11 with gauze；Positive plate 202 is iron plate plate, and minus plate 201 is graphite cake, and minus plate 201 and positive plate 202 are all provided with crossing the aperture of water；Packing layer 113 is kieselguhr and mixture of fly ash, adds NaCl in packing layer；
Electrolysis lower-left, primary response pond 11 end sets water inlet 111, and its upper right side is set electrolyte outlet 112 water inlet 111 and is all connected with electrolysis primary response pond 11 by the pipeline of flange with electrolyte outlet 112, and outlet pipe is that bend pipe is to prevent the waste water of sedimentation tank from flowing backwards；The anode region in electrolysis primary response pond 11 is provided with electrolyte outlet 112 and is connected with sedimentation tank 12 upper end by being provided with the bend pipe of flange；Clear water reserviors 13 left upper end sets out the mouth of a river 131；
The cathode chamber electrolyte that the anode region reactant liquor that sedimentation tank 12 is come in by upper end is come in bottom mixes and carries out precipitation, wadding block sinks at the bottom of pond, supernatant enters clear water reserviors 13 from overfall 121 overflow of sedimentation tank 12 left upper end, spun yarn net is set at overfall 121, dividing suspension flco to enter clear water reserviors with current with preventing portion, the clear liquid after process is discharged from outlet 11.
The above is only preferred implementation of the present utility model; should be understood that; for the person of ordinary skill of the art; on the premise of without departing from this utility model know-why; can also make some improvements and modifications, these improvements and modifications should also be as being considered as within protection domain of the present utility model.
Claims (8)
1. the chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral, it is characterised in that include being electrolysed primary response pond and being disposed in parallel in sedimentation tank and the clear water reserviors of electrolysis side, primary response pond；Described electrolysis primary response pond includes minus plate, positive plate, anode and cathode terminals, packing layer；Described minus plate and positive plate are fixed on the two ends, left and right in electrolysis primary response pond by groove, are provided with the packing layer of saliferous in the middle of minus plate and positive plate, and described packing layer gauze fixes the middle being placed in electrolysis primary response pond；Lower-left, described electrolysis primary response pond end is provided with water inlet, and its upper right side is provided with electrolyte outlet；Described water inlet and electrolyte outlet are all connected with electrolysis primary response pond by being provided with the pipeline of flange；The anode region in described electrolysis primary response pond is provided with electrolyte outlet and is connected with sedimentation tank upper end by being provided with the pipeline of flange；The cathode chamber in described electrolysis primary response pond is connected with sedimentation tank lower end water inlet by water circulating pump；Described sedimentation tank left upper end sets overfall；Described clear water reserviors upper end is provided with outlet.
A kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral the most according to claim 1, it is characterised in that described positive plate is iron plate or aluminium sheet.
A kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral the most according to claim 1, it is characterised in that described minus plate is graphite cake, corrosion resistant plate or inert electrode.
A kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral the most according to claim 1, it is characterised in that be equipped with, on described minus plate and positive plate, the aperture that water can be crossed.
A kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral the most according to claim 1, it is characterised in that described packing layer is the one in clay, kieselguhr and flyash.
A kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral the most according to claim 1, it is characterised in that the pipeline that the anode region in described electrolysis primary response pond is connected with sedimentation tank upper end water inlet is bend pipe.
A kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral the most according to claim 1, it is characterised in that set spun yarn net at described overfall.
8. according to the arbitrary described a kind of chromate waste water processing means collecting electrolysis, oxidoreduction, precipitation integral of claim 1-7, it is characterised in that described sedimentation tank is 1～3: 1 with the pond appearance ratio of clear water reserviors.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520930958.0U CN205420014U (en) | 2015-11-20 | 2015-11-20 | Current collection is separated, chromium -containing wastewater processing apparatus of redox , sediment integration |
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| CN201520930958.0U CN205420014U (en) | 2015-11-20 | 2015-11-20 | Current collection is separated, chromium -containing wastewater processing apparatus of redox , sediment integration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250144A (en) * | 2020-09-25 | 2021-01-22 | 暨南大学 | Cr (VI) removing and recovering method based on electrochemical oxidation-reduction sequence conversion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250144A (en) * | 2020-09-25 | 2021-01-22 | 暨南大学 | Cr (VI) removing and recovering method based on electrochemical oxidation-reduction sequence conversion |
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Address after: 410000 No. 8 Aviation Road, Wangcheng Economic and Technological Development Zone, Changsha City, Hunan Province Patentee after: HUNAN JINLV ENVIRONMENTAL PROTECTION CO., LTD. Address before: 410000 Fourth Floor of Management Committee Office Building of Longping High-tech Park, Furong District, Changsha City, Hunan Province Patentee before: HUNAN JINLV ENVIRONMENTAL PROTECTION CO., LTD. |
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