CN102674597A - Multiphase flow electro-flotation processing method of sewage and multiphase flow electro-flotation device - Google Patents
Multiphase flow electro-flotation processing method of sewage and multiphase flow electro-flotation device Download PDFInfo
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- CN102674597A CN102674597A CN2012101597097A CN201210159709A CN102674597A CN 102674597 A CN102674597 A CN 102674597A CN 2012101597097 A CN2012101597097 A CN 2012101597097A CN 201210159709 A CN201210159709 A CN 201210159709A CN 102674597 A CN102674597 A CN 102674597A
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Abstract
The invention discloses a multiphase flow electro-flotation processing method of sewage and a multiphase flow electro-flotation device. The sewage entering into a dissolved air flotation contact area of an air flotation tank is subjected to dissolved air flotation treatment through a multiphase flow electro-flotation pump, and then subjected to electro-flotation treatment under the actions of the multiphase flow electro-flotation pump and an electro-flotation electrode group after entering into the electro-flotation contact area of the air flotation tank, and the water subjected to electro-flotation treatment stands to form purified water to be discharged. The multiphase flow electro-flotation device disclosed by the invention has the advantages of stable treatment effect, high separating efficiency, low fault rate and low production and operation costs, and is simple and convenient to operate; and an electrode for achieving electro-flotation is not easily polluted and plugged, and the energy consumption of dissolved air flotation is reduced.
Description
Technical field
The invention belongs to technology of waste water control, be specifically related to a kind of sewage air-flotation treatment method and air-floating apparatus.
Background technology
At present, in wastewater treatment industry, air-float technology is the technology of using always.Existing air flotation technology is air-dissolving air-float, mechanical air flotation or electric floating.The air flotation effect of these air-float technologies is poor, and failure rate is difficult to handle effluent index.
The problem that this type of technology exists: 1) bubble of mechanical air flotation is big, and air flotation effect is poor; 2) the air-dissolving air-float operation energy consumption is high, operational difficulty, and failure rate is high; 3) though electric floating air flotation effect is good, the air supporting electrode pollutes easily, needs routine cleaning.
How addressing the above problem, existing document does not have public reported as yet.
Summary of the invention
The object of the present invention is to provide the electric floating device of electric floating treatment method of a kind of sewage polyphasic flow and polyphasic flow, to address the above problem.
The electric floating device of polyphasic flow of the present invention, it comprises air buoyancy tank, the polyphasic flow Airfloat pump, the air buoyancy tank bottom connects the water inlet pipe of UNICOM's sewage, and air buoyancy tank top connects UNICOM's water purification rising pipe, is provided with first dividing plate, second partition in the air buoyancy tank; First dividing plate, second partition is divided into air-dissolving air-float zone of action and electric air supporting zone of action with the spatial in the air buoyancy tank, is provided with electric air supporting electrode group in the air buoyancy tank of electric air supporting zone of action; First output tube of polyphasic flow Airfloat pump is connected UNICOM with the air-dissolving air-float zone of action of air buoyancy tank, and second output tube of polyphasic flow Airfloat pump is connected UNICOM with the electric air supporting zone of action of air buoyancy tank.
Said water inlet pipe is connected UNICOM with the air-dissolving air-float zone of action of air buoyancy tank.
Said air-dissolving air-float zone of action has by first dividing plate and air buoyancy tank tank shell and constitutes; Electric air supporting zone of action is made up of first dividing plate, second partition and air buoyancy tank tank shell.
The height of height first dividing plate of said second partition.
Be provided with the 3rd dividing plate in the air buoyancy tank, constitute the flotation separation zone between the 3rd dividing plate, second partition and the air buoyancy tank tank shell, constitute clean water area between the 3rd dividing plate and the air buoyancy tank tank shell.
Clean water area is connected in the 3rd dividing plate bottom with the flotation separation zone.
Air buoyancy tank top is provided with slag scraper, is provided with slag chute in the air buoyancy tank of the end of slag scraper, and scum pipe is established in the slag chute bottom.
In the electric air supporting electrode group, the distance in each electrode group between negative plate and the positive plate is 4 ~ 7 millimeters.
The electric floating treatment method of sewage polyphasic flow of the electric floating device of polyphasic flow of the present invention; It is after the sewage in the air-dissolving air-float zone of action that gets into air buoyancy tank is realized that through the polyphasic flow Airfloat pump air-dissolving air-float is handled; Get into the electric air supporting zone of action of air buoyancy tank again, under the effect of polyphasic flow Airfloat pump and electric air supporting electrode group, realize electric air supporting processing; Water after electric air supporting is handled forms the eliminating of purifying waste water through after leaving standstill.
The air supporting flooding quantity that gets in the air-dissolving air-float zone of action through the polyphasic flow Airfloat pump is not less than the air supporting flooding quantity that gets in the electric air supporting zone of action.
The part of purifying waste water gets into the water inlet pipe of polyphasic flow Airfloat pump, forms recycling of air-float water.
In implementing electric air supporting treating processes, the positive and negative electrode switch operation.
The present invention utilizes the polyphasic flow Airfloat pump in same air buoyancy tank, to realize air-dissolving air-float and electric floating; Make the air supporting effluent quality be superior to air-dissolving air-float and mechanical air flotation, simultaneously, the operation operation is more stable.Its body of air-floating apparatus can be structures, also can be equipment.
Have following advantage by new-type air-floatation technology of the present invention:
Treatment effect is stable, and separation efficiency is high; Failure rate is low; The production run cost is low; The operation operation is easy; Realize that electric pneumatically supported electrode is difficult for contamination and plugging, reduce the air-dissolving air-float energy consumption.
Description of drawings
The electric floating apparatus structure synoptic diagram of Fig. 1 polyphasic flow.
Embodiment
As shown in Figure 1, the structure of the electric floating device of polyphasic flow is following: air buoyancy tank 1 can be structures, also can be equipment.Air buoyancy tank 1 is provided with first dividing plate 14, second partition 15 and the 3rd dividing plate 16; First dividing plate 14 constitutes air-dissolving air-float zone of action 17 with air buoyancy tank tank shell (comprising base plate, side plate and end plate); First dividing plate 14, second partition 15 and air buoyancy tank tank shell (comprising base plate, side plate) constitute electric air supporting zone of action 18.Constitute flotation separation zone 19 between the 3rd dividing plate 16, second partition 15 and the air buoyancy tank tank shell (comprising base plate, side plate); Constitute clean water area 20 between the 3rd dividing plate 16 and the air buoyancy tank tank shell (comprising base plate, side plate, another end plate).Air buoyancy tank 1 top connects UNICOM's water purification rising pipe 11.
First dividing plate 14 is connected with the base plate 21 of air buoyancy tank tank shell with second partition 15, and the height of second partition 15 is greater than the height of first dividing plate 14.
The 3rd dividing plate 16 is connected with air buoyancy tank tank shell top, and clean water area is connected in the 3rd dividing plate bottom with the flotation separation zone, is provided with water channel 22 between the base plate 21 of the 3rd dividing plate 16 lower surfaces and air buoyancy tank tank shell in the present embodiment.Additional embodiments can be that the 3rd dividing plate 16 is connected with the base plate 21 of air buoyancy tank tank shell; Top is connected with air buoyancy tank tank shell top; Through hole is established at the 3rd dividing plate 16 in two spaces (clean water area and flotation separation zone) that formation separates, UNICOM two spaces (clean water area and flotation separation zone).
Air buoyancy tank 1 top is provided with slag scraper 13, is provided with slag chute 12 in the air buoyancy tank of the end of slag scraper 13, and scum pipe 23 is established in the slag chute bottom.Slag chute 12 is located in the flotation separation zone.
Above-mentioned air-dissolving air-float zone of action 17, electric air supporting zone of action 18, flotation separation zone 19 and clean water area 20 have diagram once to be provided with from left to right in the present embodiment.
Be provided with electric air supporting electrode group in the electric air supporting zone of action 18 in the air buoyancy tank 1.
Electric air supporting electrode group comprises the anode 29 and negative electrode 30 that many groups are oppositely arranged.
Anode 29 comprises anode-supported plate 29.1 in the present embodiment, and spaced and parallel is provided with a plurality of positive plates 29.2 on the anode-supported plate 29.1; Positive plate 29.2 adopts DSA (dimensionally stable anode) catalyticing anode electrode, adopts the netted titanium electrode of coating of metal oxides.
Negative electrode 30 comprises cathode branch fagging 30.1, and spaced and parallel is provided with a plurality of negative plates 30.2 on the cathode branch fagging 30., and negative plate 30.2 adopts DSA catalyticing anode electrode.
Arranged in a crossed manner at interval between negative plate 10.2 and the positive plate 9.2, constitute a plurality of electrode groups; Distance in each electrode group between negative plate and the positive plate is 4 ~ 7 millimeters.
Anode-supported plate 29.1 is connected with high frequency switch power 4 with cathode branch fagging 30.1.
The air buoyancy tank tank shell of air-dissolving air-float zone of action 17 connects UNICOM's air supporting water inlet pipe 2, i.e. sewage water inlet pipe.
The water inlet pipe 8 of polyphasic flow Airfloat pump 10 is connected UNICOM with air buoyancy tank 1 interior clean water area 20.The air inlet pipe 9 of polyphasic flow Airfloat pump 10 and water inlet pipe 8 form the entering of polyphasic flow Airfloat pump 10 waters and gas phase.
First output tube 3 of polyphasic flow Airfloat pump 10 (air-dissolving air-float zone of action influent gas) is connected UNICOM with the air-dissolving air-float zone of action 17 of air buoyancy tank, and second output tube 6 of polyphasic flow Airfloat pump (electric air supporting zone of action 18 influent gas) is connected UNICOM with the electric air supporting zone of action 18 of air buoyancy tank.
The present invention handles the air supporting of sewage: will get into sewage in the air-dissolving air-float zone of action of air buoyancy tank through the processing of polyphasic flow Airfloat pump realization air-dissolving air-float after; Get into the electric air supporting zone of action of air buoyancy tank again, under the effect of polyphasic flow Airfloat pump and electric air supporting electrode group, realize electric air supporting processing; Water after electric air supporting is handled forms the eliminating of purifying waste water through after leaving standstill.
Specifically: after waste water process coagulation, the flocculation, get into the air-dissolving air-float zone of action 17 of air buoyancy tank.
Water purification gets into the polyphasic flow Airfloat pump from water inlet pipe 8, and gas directly sucks from the import of pump, without air compressor machine, pressure-pot, reliever.After gas sucks the pump housing,, form a large amount of microbubbles, bubble diameter 30～50 μ m through after the cutting of multiphase flow pump; Electric floating electrode can produce the micro-bubble of 10～30 μ m in the water under galvanic effect.
The water outlet of polyphasic flow Airfloat pump flows into air-dissolving air-float reaction zone and electric floating reaction zone respectively; The air supporting flooding quantity that the polyphasic flow Airfloat pump gets in the air-dissolving air-float zone of action is 60% of a polyphasic flow Airfloat pump aquifer yield; Instant gas air supporting reaction zone is by 60% water inlet of total quantity of reflux; The air supporting flooding quantity that the polyphasic flow Airfloat pump gets in the electric air supporting zone of action is 40% of a polyphasic flow Airfloat pump aquifer yield, and promptly electric floating reaction zone is by 40% water inlet of total quantity of reflux.
In the air-dissolving air-float reaction zone, can form the micropore bubble (bubble diameter 30～50 μ m) of highly dispersed effect.
In the air-dissolving air-float reaction zone, a large amount of suspended substances are earlier in air-dissolving air-float reaction zone come-up, and water outlet is flowing into electric floating region;
In electric floating reaction zone, the DSA catalysis electrode is installed, anode and cathode adopts identical electrode.Anode and cathode interelectrode distance 6mm, electrode area is by being no less than 0.2m
2/ m
3, current density≤200A/m
2
Electrode produces littler micropore bubble, and bubble diameter is 10～20 μ m, and remaining suspended substance is further floated, and forms scum silica frost, through slag scraper scum silica frost is removed.
In the pneumatically supported while of electricity, electrode surface discharges a large amount of micro-bubbles and has quickened the particulate collision process, and density hour will float and separate, and then sinks when density is big and separates removal, helps to remove rapidly The dissolved and suspended state colloidal compound in the waste water.Employing has the DSA electrode of catalyzed oxidation function, and in electric floating process, can separate out oxygen, reactive chlorine and hydroxyl radical free radical (OH) with very high oxidation activity has very strong oxidation capacity to the dissolved organic matter in the water.In this course, air supporting and electro-oxidation process have taken place simultaneously, the dissolved organic matter in the water, oxidisability metal, colloid and suspended state pollutent are all effectively transformed and are removed.
Through the positive and negative electrode switch operation, can realize the automatically cleaning of electrode, make operation simpler.
The scum silica frost that air supporting produces is scraped to pneumatically supported slag chute through slag scraper, through the shore pipe emptying of slag chute bottom.
Water treatment effect such as following table:
| Project | Water inlet | The air supporting water outlet | On average go to team to lead % |
| COD Cr(mg/l) | 300~500 | 80~100 | 77.5 |
| Ammonia nitrogen (mg/l) | 3 | 0.5 | 83 |
| Total iron (mg/l) | 3 | 0.05 | 98.3 |
| SS(mg/l) | 100 | 20 | 80 |
Claims (10)
1. electric floating device of polyphasic flow, it comprises air buoyancy tank, the polyphasic flow Airfloat pump, the air buoyancy tank bottom connects the water inlet pipe of UNICOM's sewage, and air buoyancy tank top connects UNICOM's water purification rising pipe, it is characterized in that being provided with in the air buoyancy tank first dividing plate, second partition; First dividing plate, second partition is divided into air-dissolving air-float zone of action and electric air supporting zone of action with the spatial in the air buoyancy tank, is provided with electric air supporting electrode group in the air buoyancy tank of electric air supporting zone of action; First output tube of polyphasic flow Airfloat pump is connected UNICOM with the air-dissolving air-float zone of action of air buoyancy tank, and second output tube of polyphasic flow Airfloat pump is connected UNICOM with the electric air supporting zone of action of air buoyancy tank.
2. the electric floating device of polyphasic flow according to claim 1 is characterized in that said water inlet pipe is connected UNICOM with the air-dissolving air-float zone of action of air buoyancy tank.
3. the electric floating device of polyphasic flow according to claim 1 is characterized in that said air-dissolving air-float zone of action has by first dividing plate and air buoyancy tank tank shell to constitute; Electric air supporting zone of action is made up of first dividing plate, second partition and air buoyancy tank tank shell.
4. like claim 1 or the electric floating device of 3 said polyphasic flows, it is characterized in that the height of height first dividing plate of said second partition.
5. like claim 1 or the electric floating device of 3 said polyphasic flows, it is characterized in that being provided with in the air buoyancy tank the 3rd dividing plate, constitute the flotation separation zone between the 3rd dividing plate, second partition and the air buoyancy tank tank shell, constitute clean water area between the 3rd dividing plate and the air buoyancy tank tank shell.
6. like the electric floating device of the said polyphasic flow of claim 5, it is characterized in that clean water area is connected in the 3rd dividing plate bottom with the flotation separation zone.
7. the electric floating device of polyphasic flow according to claim 1 is characterized in that air buoyancy tank top is provided with slag scraper, is provided with slag chute in the air buoyancy tank of the end of slag scraper, and scum pipe is established in the slag chute bottom.
8. electric floating treatment method of sewage polyphasic flow based on the electric floating device of the said polyphasic flow of claim 1; It is after the sewage in the air-dissolving air-float zone of action that gets into air buoyancy tank is realized that through the polyphasic flow Airfloat pump air-dissolving air-float is handled; Get into the electric air supporting zone of action of air buoyancy tank again, under the effect of polyphasic flow Airfloat pump and electric air supporting electrode group, realize electric air supporting processing; Water after electric air supporting is handled forms the eliminating of purifying waste water through after leaving standstill.
9. like the electric floating treatment method of the said sewage polyphasic flow of claim 8, it is characterized in that being not less than the air supporting flooding quantity that gets in the electric air supporting zone of action through the air supporting flooding quantity that the polyphasic flow Airfloat pump gets in the air-dissolving air-float zone of action.
10. like claim 8 or the electric floating treatment method of 9 said sewage polyphasic flows, a part of water inlet pipe that gets into the polyphasic flow Airfloat pump that it is characterized in that purifying waste water forms recycling of air-float water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210159709 CN102674597B (en) | 2012-05-22 | 2012-05-22 | Multiphase flow electro-flotation processing method of sewage and multiphase flow electro-flotation device |
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| CN 201210159709 CN102674597B (en) | 2012-05-22 | 2012-05-22 | Multiphase flow electro-flotation processing method of sewage and multiphase flow electro-flotation device |
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| CN102674597A true CN102674597A (en) | 2012-09-19 |
| CN102674597B CN102674597B (en) | 2013-08-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106167316A (en) * | 2015-05-22 | 2016-11-30 | 中国石油天然气股份有限公司 | The novel pre-treatment process of cleaning of evaporator sewage |
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| JPS6044090A (en) * | 1983-08-20 | 1985-03-08 | Takeuchi Tekko Kk | Waste water purifying apparatus |
| JPH0644090A (en) * | 1992-07-27 | 1994-02-18 | Toshiba Corp | Master/slave computer system and master selection control method |
| CN101215060A (en) * | 2007-12-27 | 2008-07-09 | 江苏工业学院 | Device for treating oil field waste water |
| CN201183768Y (en) * | 2008-02-28 | 2009-01-21 | 北京首创纳米科技有限公司 | Sewage treating device |
| CN101575151A (en) * | 2009-06-05 | 2009-11-11 | 福建工程学院 | Two-stage electroflotation water treatment technology and special device thereof |
-
2012
- 2012-05-22 CN CN 201210159709 patent/CN102674597B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044090A (en) * | 1983-08-20 | 1985-03-08 | Takeuchi Tekko Kk | Waste water purifying apparatus |
| JPH0644090A (en) * | 1992-07-27 | 1994-02-18 | Toshiba Corp | Master/slave computer system and master selection control method |
| CN101215060A (en) * | 2007-12-27 | 2008-07-09 | 江苏工业学院 | Device for treating oil field waste water |
| CN201183768Y (en) * | 2008-02-28 | 2009-01-21 | 北京首创纳米科技有限公司 | Sewage treating device |
| CN101575151A (en) * | 2009-06-05 | 2009-11-11 | 福建工程学院 | Two-stage electroflotation water treatment technology and special device thereof |
Non-Patent Citations (1)
| Title |
|---|
| 马志毅等: "电气浮对水中油类及表面活性剂去除的试验研究", 《水处理技术》, vol. 24, no. 5, 31 October 1998 (1998-10-31), pages 303 - 307 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106167316A (en) * | 2015-05-22 | 2016-11-30 | 中国石油天然气股份有限公司 | The novel pre-treatment process of cleaning of evaporator sewage |
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