CN103395908A - Series type internal circulation Fenton fluidized-bed oxidizing tower - Google Patents
Series type internal circulation Fenton fluidized-bed oxidizing tower Download PDFInfo
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- CN103395908A CN103395908A CN2013102865209A CN201310286520A CN103395908A CN 103395908 A CN103395908 A CN 103395908A CN 2013102865209 A CN2013102865209 A CN 2013102865209A CN 201310286520 A CN201310286520 A CN 201310286520A CN 103395908 A CN103395908 A CN 103395908A
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Abstract
The invention discloses a series type internal circulation Fenton fluidized-bed oxidizing tower. The oxidizing tower comprises two series type internal circulation Fenton fluidized-bed pipe column main bodies. Each series type internal circulation Fenton fluidized-bed pipe column main body is internally provided with a circulating water-distribution area, a Fe<2+> fluidized reaction area, a reaction filtering area and a reaction termination area from bottom to top. The oxidizing tower disclosed by the invention has the advantages that two Fenton fluidized-bed oxidizing towers are innovatively connected in series and are combined with internal circulation process, the addition of Fe<2+> is reduced, and residual H2O2 is fully utilized, so that the cost of iron-containing sludge in the following treatment is reduced and the removing efficiency of COD is increased.
Description
Technical field
The present invention relates to a kind of fluidized-bed oxidizing tower, particularly a kind of tandem internal recycle Fenton fluidized-bed oxidizing tower.
Background technology
For preventing the secondary pollution of urban water-body, complete the transformation of municipal effluent to a new urban water resource, just must study stable, efficient, energy-conservation sewerage advanced treatment process, secondary effluent is carried out tertiary treatment again, further remove refractory organic, this has also become an inexorable trend of municipal sewage treatment development.Its deep treatment method mainly contains flocculent precipitation, Ozonation and active carbon adsorption etc. at present.The Fenton method is considered to a kind of high-level oxidation technology of effective removal hardly degraded organic substance, and its cardinal principle is to utilize Fe
2+As H
2O
2Catalyzer, produce the very strong OH of oxidation capacity in reaction process, and OH oxidation major part organism rapidly.Fenton reagent is Fe
2+And H
2O
2Combination, both reaction generates the hydroxy radical qiao with high reaction activity, OH can make its degraded so that mineralising with most of organism effects.This shows, the essence of Fenton reagent degradation of organic substances is that OH propagates radical chain reaction by approach such as transfer transports, and part attack organism RH captures hydrogen, generates radical R, and R further is degraded to small organic molecule or mineralising becomes CO
2And H
2The inorganicss such as O, part fissions C-C key or C-H key with the organism reaction, finally is degraded to harmless object.In addition, the Fe of generation (OH)
3Colloid has flocculation, adsorption function.Compare with other traditional water treatment method, the Fenton oxidation technology has the following advantages: (1) produces a large amount of very active hydroxyl radical free radicals, and it, as the middle active specy of reaction, has very high oxidation activity; (2) hydroxyl radical free radical, without the pollutant reaction in selectively direct and waste water, is degraded to small-molecule substance nontoxic, readily biodegradable with it, with its mineralising, is even CO
2, water and inorganic salts, can not produce secondary pollution; (3) use H
2O
2Or molecular oxygen is as oxygenant, and its reaction has the green characteristic of original position; (4) both can be used as the application of individual curing technology, also can combine with other treating processes, reduced processing cost.So the Fenton technology has obtained research widely and has utilized in practice.
Along with the development of environmental science and technology, the Fenton method derives many branches in the last thirty years, as UV/Fenton method, UV/H
2O
2Method, iron filings/H
2O
2Method and Fenton method etc.The Fenton oxidation technology is present domestic and international application a kind of high-level oxidation technology comparatively widely.Tradition homogeneous phase Fenton technology is comparatively ripe comparatively speaking a kind of Fenton technology, but that this technology has the pH range of application is narrow, Fe
2+Shortcomings such as consumption is large, becomes iron containing sludge precipitation after reaction, the processing cost height and limit its large-scale industrialization application.Tandem internal recycle Fenton fluidized-bed oxidizing tower can reduce Fe in a large number
2+Add, take full advantage of residual H
2O
2Thereby, reduce the cost of subsequent disposal iron containing sludge and the removal efficiency that improves COD.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of tandem internal recycle Fenton fluidized-bed oxidizing tower, comprises 2 tandem internal recycle Fenton fluidized-bed tubing string main bodys 1,2.Be provided with circulation water distributing area 3, Fe from bottom to top in tandem internal recycle Fenton fluidized-bed tubing string main body
2+Fluidized reaction zone 4, reaction zone of transition 5, reaction terminating district 21.
Tandem internal recycle Fenton fluidized-bed tubing string main part size: 100mm * 1000mm, upper end connects the tapered tube of d=100～150mm, and the tapered tube height is 50mm; The synthetic glass post of tapered tube upper end connection diameter d=150mm, height is respectively 600mm, 400mm, and the main part effective volume is V=15L.
Tandem internal recycle Fenton fluidized-bed oxidizing tower quartz sand carrier layer height: 0.3m, the granulated glass sphere of d=6～7mm that bottom is used is as bottom cushion, the bottom cushion height is 5cm, with the granulated glass sphere of d=3～4mm as the top bed course, top bed course height is 3～4cm, the effect of two-layer bed course is to prevent that carrier from leaking into reactor bottom, and can disperse to enter the fluid of reactor, fluid is cut into countless shallow bid current during by bed course, can better impel the carrier fluidization, laying quartz sand above bed course is the fluidized-bed carrier.
Tandem internal recycle Fenton fluidized-bed oxidizing tower 1 bottom is provided with a water inlet pipe 6, and waste water carries out acid-alkali accommodation and Fe by regulating tank 9
2+Add, also comprise a hydrogen peroxide grug feeding jar 8, it is connected with tandem internal recycle Fenton fluidized-bed oxidizing tower by chemical feed pipe 7.
Described internal recycle Fenton fluidized-bed oxidizing tower tubing string (1) top is provided with rising pipe 10, with internal recycle Fenton fluidized-bed oxidizing tower tubing string (2) recycling effluent mouth 11, is connected; Described internal recycle Fenton fluidized-bed oxidizing tower (2) top is provided with a water inlet pipe 13 and a rising pipe 12.
In addition, described internal recycle Fenton fluidized-bed tubing string main body (1,2) is equipped with internal circulation apparatus, wherein is provided with water inlet pipe 14 and rising pipe 15; Fluidized height 1m when return flow is 500L/h.
Under meter 16 all is set on all return lines.
The invention has the beneficial effects as follows: utilize tandem internal recycle Fenton fluidized-bed oxidizing tower of the present invention, H while having overcome traditional F enton method advanced treatment of waste water on the one hand
2O
2Residue problem, further improved removal efficiency, can realize on the other hand the minimizing of mud, the very big problem of sludge quantity while overcoming traditional F enton method processing organic waste water.But this technology advanced treatment organic wastewater with difficult degradation thereby, and make water outlet reach national relevant emission standards; Internal recycle Fenton fluidized-bed oxidizing tower provided by the invention, is characterized in that having reduced Fe in addition
2+Add, take full advantage of residual H
2O
2Thereby, reduce the cost of subsequent disposal iron containing sludge and the removal efficiency that improves COD.
Description of drawings
Fig. 1 is this practical invention schematic diagram.
1: tubing string main body 1
2: tubing string main body 2
3: the circulation water distributing area
4:Fe
2+Fluidized reaction zone
5: the reaction zone of transition
6:1 post water inlet pipe
7: chemical feed pipe
8: the hydrogen peroxide grug feeding jar
9: regulating tank
10:1 post rising pipe
11:2 post recycling effluent mouth
12:2 post rising pipe
13:2 post water inlet pipe
14: water inlet pipe
15: rising pipe
16: under meter
17: recycle pump
18: volume pump 18
19: volume pump 19
20: the recycle system
21: the reaction terminating district
22: the quartz sand carrier
Fig. 2 is H
2O
2The impact of dosage on the COD clearance
Embodiment:
Below by embodiment, this practicality invention is described further:
Implementation step: as shown in Figure 1, a kind of tandem internal recycle Fenton fluidized-bed oxidizing tower, comprise 1 No. 1 post 1 of tandem internal recycle Fenton fluidized-bed pipe and No. 2 posts 2 of 1 tandem internal recycle Fenton fluidized-bed pipe.Be provided with circulation water distributing area 3, Fe from bottom to top in tandem internal recycle Fenton fluidized-bed tubing string main body
2+Fluidized reaction zone 4, reaction zone of transition 5, reaction terminating district 21.
Tandem internal recycle Fenton fluidized-bed oxidizing tower (No. 1 post) bottom is provided with a water inlet pipe 6, and waste water carries out acid-alkali accommodation and Fe by regulating tank 9
2+Add, also comprise a hydrogen peroxide grug feeding jar 8, it is connected with tandem internal recycle Fenton fluidized-bed oxidizing tower by chemical feed pipe 7.
Tandem internal recycle Fenton fluidized-bed oxidizing tower (No. 1 post) top is provided with rising pipe 10, with No. 2 post recycling effluent mouths 11, is connected.
Tandem internal recycle Fenton fluidized-bed oxidizing tower (No. 2 posts) top is provided with a water inlet pipe 13 and a rising pipe 12.
No. 1 post and No. 2 posts are equipped with internal circulation apparatus, wherein are provided with water inlet pipe 14, rising pipe 15, under meter 16 and recycle pump 17.
Below illustrate using method of the present invention:
As shown in fig. 1, tandem internal recycle Fenton fluidized-bed oxidizing tower, have 1 No. 1 post 1 of tandem internal recycle Fenton fluidized-bed pipe and No. 2 posts 2 of 1 tandem internal recycle Fenton fluidized-bed pipe.Be provided with circulation water distributing area 3 from bottom to top in tandem internal recycle Fenton fluidized-bed tubing string main body, waste water is transferred after pH and Fe
2+After mixing, enter No. 1 post 1 of tandem internal recycle Fenton fluidized-bed pipe by volume pump 18, simultaneously H in equalizing tank 9
2O
2Enter reactor through volume pump 19; Waste water and H
2O
2Pour at a high speed system via the recycle system, be evenly distributed to Fe
2+Fluidized reaction zone 4, generate the hydroxyl radical free radical with hyperoxia voltinism with hydrogen peroxide and quartz sand carrier 22 and ferrous reaction, with organic waste water, carries out the synergistic oxidation effect; Waste water further flows into No. 2 posts 2 of tandem internal recycle Fenton fluidized-bed pipe via reaction zone of transition 5, by the recycle system 20, squeezes at a high speed Fe
2+Fluidized reaction zone 4, generate the hydroxyl radical free radical with hyperoxia voltinism with residue hydrogen peroxide and quartz sand carrier 22 and ferrous reaction, with organic waste water, carries out the synergistic oxidation effect; In whole system, the waste water 21 in reaction zone of transition 5 and reaction terminating district continues to enter Fe by the recycle system 20
2+Fluidized reaction zone 4 is reacted.
Lower mask body is described further application of the present invention and effect in conjunction with application examples:
Adopt tandem internal recycle Fenton fluidized-bed oxidizing tower to carry out advanced treatment to percolate waste water, the pH value before water inlet is that 6.0, COD is 305mg/L, and experimental result as shown in Figure 2.Concrete processing mode is as follows: according to character and the pertinent literature report of this experiment water sample, Fenton oxide treatment condition setting is Fe2+ dosage 150mg/L(Fe2+/COD=1:2, FeSO47H2O:744mg/L), initial pH value is 3.0, and the residence time is the 30min(wastewater flow: 50L/h).Adopt the initial pH value of H2SO4 and NaOH regulation system according to particular case, add Fe2+ to equalizing tank, open intake pump and hydrogen peroxide pump, open simultaneously recycle pump, fluidization highly reaches 1m needs circular flow 500L/h, waste water and H2O2 are evenly distributed to Fe2+ fluidized reaction zone 4, generate the hydroxyl radical free radical with hyperoxia voltinism with hydrogen peroxide and quartz sand carrier 22 and ferrous reaction, carry out entering No. 2 posts 2 of tandem internal recycle Fenton fluidized-bed pipe after the synergistic oxidation reaction with organic waste water, utilize remaining H2O2 to carry out oxidizing reaction.When this test H2O2 dosage was 222mg/L, the COD of processed waste water was 91mg/L, and this moment, the COD clearance was 70.3%.
Claims (7)
1. tandem internal recycle Fenton fluidized-bed oxidizing tower, comprise 2 tandem internal recycle Fenton fluidized-bed tubing string main bodys (1,2), it is characterized in that being disposed with circulation water distributing area (3), Fe from bottom to top in described internal recycle Fenton fluidized-bed tubing string main body
2+Fluidized reaction zone (4), reaction zone of transition (5), reaction terminating district (21).
2. internal recycle Fenton fluidized-bed oxidizing tower according to claim 1, it is characterized in that described internal recycle Fenton fluidized-bed oxidizing tower (1) bottom is provided with a water inlet pipe (6), also comprise a hydrogen peroxide grug feeding jar (8), it is connected with tandem internal recycle Fenton fluidized-bed oxidizing tower by chemical feed pipe (7), and waste water carries out acid-alkali accommodation and Fe by regulating tank 9
2+Add.
3. internal recycle Fenton fluidized-bed oxidizing tower according to claim 1, it is characterized in that described tandem internal recycle Fenton fluidized-bed tubing string main part size: 100mm * 1000mm, upper end connects the tapered tube of d=100～150mm, and the tapered tube height is 50mm; The synthetic glass post of tapered tube upper end connection diameter d=150mm, height is respectively 600mm, 400mm, and the main part effective volume is V=15L.
4. a kind of tandem internal recycle Fenton fluidized-bed oxidizing tower according to claim 1, it is characterized in that described internal recycle Fenton fluidized-bed oxidizing tower tubing string (1) top is provided with rising pipe 10, is connected with internal recycle Fenton fluidized-bed oxidizing tower tubing string (2) recycling effluent mouth (11).
5. a kind of tandem internal recycle Fenton fluidized-bed oxidizing tower according to claim 1, is characterized in that described internal recycle Fenton fluidized-bed oxidizing tower (2) top is provided with a water inlet pipe (13) and a rising pipe (12).
6. a kind of tandem internal recycle Fenton fluidized-bed oxidizing tower according to claim 1, is characterized in that described internal recycle Fenton fluidized-bed tubing string main body (1,2) is equipped with internal circulation apparatus, wherein is provided with water inlet pipe (14) and rising pipe (15).
7. according to claim 1-6 arbitrary described internal recycle Fenton fluidized-bed oxidizing towers, is characterized in that having reduced Fe
2+Add, take full advantage of residual H
2O
2Thereby, reduce the cost of subsequent disposal iron containing sludge and the removal efficiency that improves COD.
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| CN103395908B CN103395908B (en) | 2015-06-03 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103755106A (en) * | 2014-02-13 | 2014-04-30 | 广州益方田园环保股份有限公司 | Fluidized bed oxidizing tower and treatment process thereof |
| CN104192979A (en) * | 2014-09-23 | 2014-12-10 | 南京大学 | Fenton fluidized bed biochemical tail water advanced treatment method |
| CN104671500A (en) * | 2015-02-11 | 2015-06-03 | 福建工程学院 | Fenton catalytic oxidation device of circulating variable-speed fluidized bed |
| CN104909504A (en) * | 2015-06-16 | 2015-09-16 | 北京纬纶华业环保科技股份有限公司 | High-salt high-COD wastewater treatment system and method |
| CN106167298A (en) * | 2016-08-22 | 2016-11-30 | 江苏金点环保科技有限公司 | The new device that a kind of Fenton oxidation processes |
| 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 |
| CN107055896A (en) * | 2017-06-20 | 2017-08-18 | 南京交通职业技术学院 | A kind of ortho-aminobenzoic acid wastewater treatment equipment and method |
| CN109455796A (en) * | 2018-12-29 | 2019-03-12 | 青岛科技大学 | A kind of technique for treating industrial wastewater of zeroth order internal electrolysis of iron coupling internal circulating fluidized bed Fenton |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103755106A (en) * | 2014-02-13 | 2014-04-30 | 广州益方田园环保股份有限公司 | Fluidized bed oxidizing tower and treatment process thereof |
| CN103755106B (en) * | 2014-02-13 | 2015-12-30 | 广州益方田园环保股份有限公司 | A kind of fluidized-bed oxidizing tower and treatment process thereof |
| CN104192979A (en) * | 2014-09-23 | 2014-12-10 | 南京大学 | Fenton fluidized bed biochemical tail water advanced treatment method |
| CN104192979B (en) * | 2014-09-23 | 2016-04-27 | 南京大学 | A kind of method of Fenton fluidized bed deep treatment biochemical tail water |
| CN104671500A (en) * | 2015-02-11 | 2015-06-03 | 福建工程学院 | Fenton catalytic oxidation device of circulating variable-speed fluidized bed |
| CN104909504A (en) * | 2015-06-16 | 2015-09-16 | 北京纬纶华业环保科技股份有限公司 | High-salt high-COD wastewater treatment system and method |
| CN106167298A (en) * | 2016-08-22 | 2016-11-30 | 江苏金点环保科技有限公司 | The new device that a kind of Fenton oxidation processes |
| 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 |
| CN107055896A (en) * | 2017-06-20 | 2017-08-18 | 南京交通职业技术学院 | A kind of ortho-aminobenzoic acid wastewater treatment equipment and method |
| CN109455796A (en) * | 2018-12-29 | 2019-03-12 | 青岛科技大学 | A kind of technique for treating industrial wastewater of zeroth order internal electrolysis of iron coupling internal circulating fluidized bed Fenton |
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