CN204550271U - A kind of stripping oxidative degradation is containing the device of high nitrobenzene waste water - Google Patents
A kind of stripping oxidative degradation is containing the device of high nitrobenzene waste water Download PDFInfo
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- CN204550271U CN204550271U CN201520122181.5U CN201520122181U CN204550271U CN 204550271 U CN204550271 U CN 204550271U CN 201520122181 U CN201520122181 U CN 201520122181U CN 204550271 U CN204550271 U CN 204550271U
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Abstract
The utility model belongs to the technical field containing high nitrobenzene wastewater treatment, containing the high problem of high nitrobenzene waste water cost, providing a kind of stripping oxidative degradation containing the device of high nitrobenzene waste water for solving the process of ozone high grade oxidation method.Rotary packed bed inlet mouth is connected with blower fan and ozone generator outlet respectively; Ozonizer import connecting fan; Air outlet connects exhaust gas processing device; Fluid inlet is connected with waste water storage tank and reservoir by liquid pump, and liquid outlet connects waste water storage tank and reservoir, and reservoir connects hydrogen peroxide container for storing liquid.Weighting material in exhaust gas processing device is activated carbon.Improve ozone oxidation efficiency, shorten the treatment time, oxidizing reaction is carried out after the pollutant load in waste water being reduced with blow-off method, reduce waste water quality change to greatest extent and reduce intermediate product growing amount, make ozone and hydroxyl radical free radical consume thing growing amount to reduce, ozone oxidation efficiency improves 65 ~ 75%, and the treatment time shortens 80%, ozone usage reduces 70%, and processing cost saves 50%.
Description
Technical field
The utility model belongs to the technical field containing high nitrobenzene wastewater treatment, is specifically related to the device of a kind of stripping oxidative degradation containing high nitrobenzene waste water.
Background technology
Usually have a nitrobenzene compound of bio-toxicity containing higher concentration volatile in explosive industry waste water, it has stronger carcinogenic mutagenicity, if not treated direct discharge, can cause serious harm to human body and environment.
Air stripping is generally be placed with aerating apparatus in the bottom of water treatment, and the air that blower fan is sent here is dispersed into small bubble, in waste body, form gas-liquid two-phase, and the volatile organic matter in waste water is transferred to gas phase from liquid phase, leaves liquid phase main body with bubble.Theoretical according to vapor liquid equilibrium, when in liquid phase, volatile organic matter concentration is higher, mass transfer force is large, is conducive to organism and enters gas phase from liquid phase.But when concentration is reduced to a certain degree, mass transfer force diminishes, processing efficiency reduces.Liquid less turbulence simultaneously in traditional aerated reaction is low, and cause liquid phase depths organism cannot arrive gas liquid film fast, mass transfer effect is poor.Because oil of mirbane boiling point is higher, the velocity of evaporation under natural condition is comparatively slow, and in single traditional aeration stripping device or packing tower, gas-liquid less turbulence is low, gas liquid interfacial area is little, and treatment effect is also not obvious.If strengthen gas liquid interfacial area and gas-liquid less turbulence, can greatly improve oil of mirbane clearance.
High-gravity technology utilizes rotating rotor liquid crushing to be become tiny drop or liquid film, brin, its yardstick is all in tens micron number magnitudes, only have the part of packing tower, this only just means in this, and quality transfering rate just will be several times as much as packing tower.In addition, in rotating rotor, liquid flows under the influence of centrifugal force, and the centrifugal force that the rotor of high speed rotating provides is the hundred times of the gravity impelling liquid-flow in packing tower.This makes liquid can overcome capillary effect, with high speed, minimum yardstick, moves in the filler of high-ratio surface.The rapid renewal of fluid surface has been impelled in the duct that filler bends, and considerably increases the turbulence of liquid.These 2 combine, and make the rate of mass transfer in hypergravity equipment improve 1 ~ 3 order of magnitude compared with the same process in packing tower.
Hypergravity-ozone high grade oxidation method is conventional wastewater oxidation treatment process, and can effectively improve ozone utilization rate and oxidation efficiency in conjunction with high-gravity technology, treatment effect is good.Patent ZL200910073666.9 discloses a kind of method of nitrobenzene-containing waste water and device of degrading that cross_flow rotating packed bed and By Ozone be coupled, but this patented method and device for be waste water containing lower concentration nitrobenzene compounds (concentration is less than 100mg/L).Open source literature " RPB-O
3/ H
2o
2method treatment of Nitrobenzene simulated wastewater " (Guo Liang etc., environmental engineering journal, 8th volume the 12nd phase, 2014) report the method for a kind of hypergravity-ozone/hydrogen peroxide oxidative treatment nitrobenzene waste water, openly report, to 300mg/L nitrobenzene-containing waste water, there is good treatment effect.If directly utilize this method process containing high density volatile organic waste water, although also can reach expection removal effect, ozone consumption obviously raises, and cost of water treatment significantly improves.This mainly because, in the process of ozone oxidation degrade organic compounds, the intermediate product generated can make waste water quality change, hydroxyl radical free radical generating rate reduces, the intermediate product simultaneously generated such as small molecules acid, alcohol can be competed and ozone and hydroxyl radical reaction with target contaminant, and oxide treatment successful is declined.When organic content height, the intermediate product of generation is just many, and it is poorer that waste water quality becomes, and oxidation effectiveness just obviously reduces.
Summary of the invention
The utility model contains the high problem of high nitrobenzene waste water cost to solve the process of ozone high grade oxidation method, provides the device of a kind of stripping oxidative degradation containing high nitrobenzene waste water.
The utility model adopts following technical scheme to realize: a kind of stripping oxidative degradation is containing the device of high nitrobenzene waste water, comprise be provided with inlet mouth, air outlet, fluid inlet, liquid outlet rotary packed bed, rotary packed bed inlet mouth is connected with blower fan and ozone generator outlet with gas meter II respectively by gas meter I; Ozonizer import connecting fan; Rotary packed bed air outlet connects exhaust gas processing device; Rotary packed bed fluid inlet is connected with waste water storage tank and reservoir by liquid pump, is provided with liquid meter between rotary packed bed fluid inlet and liquid pump; Rotary packed bed liquid outlet connects waste water storage tank and reservoir, and reservoir connects hydrogen peroxide container for storing liquid.Weighting material in exhaust gas processing device is activated carbon.
Described rotary packed bed be hypergravity swinging bed device, comprise the rotating packed bed reactor of bed of packings, deflector type or helical channel form, the filler in packing layer comprises the silk screen of metallic substance and non-metallic material, porous plate, waved plate, foam materials or structured packing; Rotary packed bed rotating speed is 300 ~ 700 rpm.Weighting material in exhaust gas processing device is activated carbon.
Hypergravity swinging bed device described in the utility model is disclosed hypergravity swinging bed device, comprise the rotating packed bed reactor (application reference number 91109255.2,91111028.3,01268009.5,200520100685.3,02114174.6 and 200510032296.6) of the forms such as bed of packings, deflector type, helical channel, preferred cross_flow rotating packed bed, filler in packing layer includes, but are not limited to: the silk screen of metallic substance and non-metallic material, porous plate, waved plate, foam materials or structured packing.
High nitrobenzene Nitrobenzene in Wastewater concentration>=500 mg/L; Stripping stage fresh air and the waste water vapour-liquid ratio in rotary packed bed is 200 ~ 600 L/m
3; H in waste water in rotary packed bed after completing stripping mass transfer process
2o
2concentration has been 0.1 ~ 2.9 mmol/L, and nitrobenzene is 80 ~ 100mg/L; The liquid-gas ratio of ozone and the rotary packed bed middle waste water of hydrogen peroxide concerted reaction process and ozone is 0.5 ~ 2.0 L/m
3, ozone concn is 10 ~ 30 mg/L.
Fully will contact with fresh air in hypergravity equipment containing high nitrobenzene waste water, and complete stripping mass transfer process and reduce organic content in waste water.Gas after stripping reclaims oil of mirbane by the exhaust gas processing device that activated carbon is housed.Waste water (nitrobenzene is at 80 ~ 100mg/L) after stripping enters reservoir, adds homogeneous catalyst H
2o
2, then will be mixed with homogeneous catalyst H
2o
2waste water and ozone gas abundant contact reacts in rotary packed bed, make to remain oil of mirbane in waste water at ozone and H
2o
2degraded under synergy.Oxidative degradation stage waste water, in rotary packed bed middle circular treatment, reaches discharging standards.
Be absorb and reaction unit with rotary packed bed, H
2o
2combine with ozone as homogeneous catalyst, make the ozone fast decoupled be dissolved in waste water, produce great amount of hydroxy group free radical, thus make oil of mirbane contaminate thing fast decoupled.H
2o
2catalytic mechanism see following formula:
（1）
（2）
the utility model has been compared with the prior art following characteristics:
Compare with traditional bubbling device or packing tower stripping nitrobenzene waste water, when nitro phenenyl concentration is reduced to 80 ~ 100mg/L from 500mg/L, the utility model uses the treatment time of cross_flow rotating packed bed stripping to shorten 80%.
Adopt method, the open source literature 2 " RPB-O of open source literature 1 " hyper-gravity gas formulation process acrylic nitrile waste water " (Xue Cuifang etc., chemical industry is in progress, the 33rd volume the 9th phase, 2014)
3/ H
2o
2method treatment of Nitrobenzene simulated wastewater " method of (Guo Liang etc., environmental engineering journal, the 8th volume the 12nd phase, 2014) and the utility model method, process high density 500mg/L nitrobenzene waste water effect comparison is as follows:
Ozone oxidation efficiency is the amount of every gram of oxidable oil of mirbane of ozone.
Contrast can find out with existing method, the utility model effectively can improve ozone oxidation efficiency, shortens the treatment time.This is because many intermediate materials (small molecules acid and alcohol) can be produced in the process utilizing ozone oxidation degradation of organic substances, the appearance of these intermediate products makes waste water quality change, pH value reduces, be unfavorable for that ozone decomposed produces the hydroxyl radical free radical of strong oxidizing property, simultaneously intermediate product also can be caught hydroxyl radical free radical its content is reduced, and then oxidation efficiency reduction.As directly utilized Ozonation process 500mg/L nitrobenzene waste water, very large change has been had when nitro phenenyl concentration is more initial to waste water quality the process of 100mg/L from 500mg/L oxidative degradation, create a large amount of intermediate products simultaneously, now continue to utilize ozone oxidation to degrade and to starting point concentration for 100mg/L nitrobenzene waste water contrastingly, the latter's oxidation efficiency is apparently higher than the former.The utility model carries out oxidizing reaction after utilizing blow-off method that the target contaminant content in waste water is reduced before oxidation stage again, the growing amount of waste water quality change and reduction intermediate product can be reduced to greatest extent, make ozone and hydroxyl radical free radical consume thing growing amount to reduce, and then raising oxidation efficiency, compared with prior art ozone oxidation efficiency can improve 65 ~ 75%, treatment time shortens 80%, and ozone usage reduces 70%, and processing cost saves 50%.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of stripping oxidative degradation described in the utility model containing high density volatile organic matter waste water.
In figure: 1-blower fan; 2-gas meter I; 3-ozonizer; 4-gas meter II; 5-exhaust gas processing device; 6-is rotary packed bed; 7-reservoir; 8-hydrogen peroxide container for storing liquid; 9-waste water storage tank; 10-liquid pump; 11-liquid meter.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.But the utility model content not limited to by following embodiment.
A kind of stripping oxidative degradation is containing the device of high nitrobenzene waste water, comprise be provided with inlet mouth, air outlet, fluid inlet, liquid outlet rotary packed bed 6, rotary packed bed 6 inlet mouth export with blower fan 1 and ozonizer 3 respectively with gas meter II 4 be connected by gas meter I 2; Ozonizer 3 import connecting fan 1; Rotary packed bed 6 air outlets connect exhaust gas processing device 5; Rotary packed bed 6 fluid inlets are connected with waste water storage tank 9 and reservoir 7 by liquid pump 10, are provided with liquid meter 11 between rotary packed bed 6 fluid inlets and liquid pump 10; Rotary packed bed 6 liquid outlets connect waste water storage tank 9 and reservoir 7, and reservoir 7 connects hydrogen peroxide container for storing liquid 8.Weighting material in exhaust gas processing device 5 is activated carbon.
High nitrobenzene Nitrobenzene in Wastewater concentration>=500 mg/L; Nitrobenzene in Wastewater content after stripping is 80 ~ 100mg/L; Stripping stage fresh air and the vapour-liquid ratio of high nitrobenzene waste water in rotary packed bed 6 are 200 ~ 600 L/m
3.H in waste water after completing stripping mass transfer process in rotary packed bed 6
2o
2concentration is 0.1 ~ 2.9 mmol/L.In ozone and hydrogen peroxide concerted reaction process rotary packed bed 6, the liquid-gas ratio of waste water and ozone is 0.5 ~ 2.0 L/m
3, ozone concn is 10 ~ 30 mg/L.Described rotary packed bed 6 is hypergravity swinging bed device, comprise the rotating packed bed reactor of bed of packings, deflector type or helical channel form, preferred cross_flow rotating packed bed, the filler in packing layer comprises the silk screen of metallic substance and non-metallic material, porous plate, waved plate, foam materials or structured packing; The rotating speed of hypergravity equipment is 300 ~ 700 rpm.
Stripping oxidative degradation is containing a method for high nitrobenzene waste water, and step is as follows: fully will contact in rotary packed bed 6 with fresh air containing high nitrobenzene waste water, completes stripping mass transfer process and reduces organic content in waste water; Waste water (nitrobenzene is at 80 ~ 100mg/L) after stripping mass transfer completes is sent in reservoir, mixes in reservoir with hydrogen peroxide, then in hypergravity equipment with ozone gas abundant contact reacts, to make in waste water residual organic substances at ozone and H
2o
2the lower degraded of synergy.
Shown in reaction process Fig. 1, air enters rotary packed bed 6 by blower fan 1 after gas meter I 2 measures.In waste water storage tank 9, waste water enters rotary packed bed 6 by liquid-inlet under the effect of liquid pump 10 after liquid meter 11 measures.Gas after stripping is absorbed by the activated carbon in exhaust gas processing device 5 and reclaims organism.When in stripping spent process water, nitrobenzene is 80 ~ 100mg/L, waste water enters in reservoir 7, carries out next step Oxidative Degradation Process.
After stripping, low-concentration nitrobenzene waste water by means (nitrobenzene is 80 ~ 100mg/L) utilizes ozone high grade oxidation technology advanced treatment, and schema is as Fig. 1.Blower fan 1 connects ozonizer 3 and enter rotary packed bed 6 after gas meter II 4 measures.H is added in reservoir 7 after stripping
2o
2, under the effect of liquid pump 10, after liquid meter 11 measures, enter rotary packed bed 6 by liquid-inlet, waste water and the abundant contact reacts of ozone, the ozone cooperative H after dissolving
2o
2produce the OH that oxidisability is stronger, oxidation operation is become small molecules acid and CO
2.Waste water is circular treatment between reservoir 7 and rotary packed bed 6, and residual gas is discharged from top and entered exhaust gas processing device 5.
Embodiment 1: utilize flow process shown in Fig. 1, process nitrobenzene-containing waste water.Nitrobenzene in Wastewater concentration is 600mg/L, and pH value is 6.8.Supergravity reactor rotating speed is 700 rpm.Stripping stage fresh air and the vapour-liquid ratio of waste water in rotary packed bed 6 are 200 L/m
3, when Nitrobenzene in Wastewater concentration is reduced to 80 mg/L, the treatment time can shorten 80% compared with traditional stripping equipment, and stripping efficiency obviously reduces afterwards.Now, utilize ozone high grade oxidation technology to carry out advanced treatment, in the waste water after stripping, add H
2o
2, make H in supergravity reactor mixing liquid
2o
2concentration is 0.1 mmol/L, and ozone concn is 10 mg/L, and the liquid-gas ratio of waste water and ozone is 0.5 L/m
3, circular treatment 15 min, Nitrobenzene in Wastewater content 2.0 mg/L, whole process treatment time is 25min.After independent hypergravity oxidation technology process 145min, nitrobenzene is 2.0mg/L, and the utility model method decreases 80% with regard to the treatment time; The utility model method ozone oxidation efficiency comparatively prior art improves 70%, and ozone usage reduces 70%, and processing cost reduces by 50%.
Embodiment 2: utilize flow process shown in Fig. 1, process nitrobenzene-containing waste water.Nitrobenzene in Wastewater concentration is 1000mg/L, and pH value is 7.1.Supergravity reactor rotating speed is 500 rpm.Stripping stage fresh air and the vapour-liquid ratio of waste water in hypergravity equipment are 400 L/m
3, when Nitrobenzene in Wastewater concentration is reduced to 100 mg/L, the treatment time can shorten 80% compared with traditional stripping equipment, and stripping efficiency obviously reduces afterwards.Utilize ozone high grade oxidation technology to carry out advanced treatment, in the waste water after stripping, add H
2o
2, make H in supergravity reactor mixing liquid
2o
2concentration is 1.0 mmol/L, and ozone concn is 15 mg/L, and the liquid-gas ratio of waste water and ozone is 1.0 L/m
3, circular treatment 15 min, Nitrobenzene in Wastewater content 2.0 mg/L, whole process treatment time is 30min.After independent hypergravity oxidation technology process 210 min, nitrobenzene is 2.0mg/L, and the utility model method decreases 85% with regard to the treatment time; The utility model method ozone oxidation efficiency comparatively prior art improves 65%, and ozone usage reduces 75%, and processing cost reduces by 45%.
Embodiment 3: utilize flow process shown in Fig. 1, process nitrobenzene-containing waste water.Nitrobenzene in Wastewater concentration is 1500mg/L, and pH value is 6.8.Supergravity reactor rotating speed is 300 rpm.Stripping stage fresh air and the vapour-liquid ratio of waste water in hypergravity equipment are 500 L/m
3, when Nitrobenzene in Wastewater concentration is reduced to 90 mg/L, the treatment time can shorten 80% compared with traditional stripping equipment, and stripping efficiency obviously reduces afterwards.Utilize ozone high grade oxidation technology to carry out advanced treatment, in the waste water after stripping, add H
2o
2, make H in supergravity reactor mixing liquid
2o
2concentration is 2.9 mmol/L, and ozone concn is 30 mg/L, and the liquid-gas ratio of waste water and ozone is 2.0 L/m
3, circular treatment 15 min, Nitrobenzene in Wastewater content 2.0 mg/L, whole process treatment time is 35min.After independent hypergravity oxidation technology process 395min, nitrobenzene is 2.0mg/L, and the utility model method decreases 90% with regard to the treatment time; The utility model method ozone oxidation efficiency comparatively prior art improves 60%, and ozone usage reduces 75%, and processing cost reduces by 50%.
Embodiment 4: utilize flow process shown in Fig. 1, process nitrobenzene-containing waste water.Nitrobenzene in Wastewater concentration is 1800mg/L, and pH value is 7.3.Supergravity reactor rotating speed is 400 rpm.Stripping stage fresh air and the vapour-liquid ratio of waste water in hypergravity equipment are 700 L/m
3, when Nitrobenzene in Wastewater concentration is reduced to 80 mg/L, the treatment time can shorten 80% compared with traditional stripping equipment, and stripping efficiency obviously reduces afterwards.Utilize ozone high grade oxidation technology to carry out advanced treatment, in the waste water after stripping, add H
2o
2, make H in supergravity reactor mixing liquid
2o
2concentration is 0.5 mmol/L, and ozone concn is 25 mg/L, and the liquid-gas ratio of waste water and ozone is 1.5 L/m
3, circular treatment 15 min, Nitrobenzene in Wastewater content 2.0 mg/L, whole process treatment time is 35min.After independent hypergravity oxidation technology process 370min, nitrobenzene is 2.0mg/L, and the utility model method decreases 90% with regard to the treatment time; The utility model method ozone oxidation efficiency comparatively prior art improves 70%, and ozone usage reduces 80%, and processing cost reduces by 60%.
Claims (4)
1. a stripping oxidative degradation is containing the device of high nitrobenzene waste water, it is characterized in that: comprise be provided with inlet mouth, air outlet, fluid inlet, liquid outlet rotary packed bed (6), the inlet mouth of rotary packed bed (6) is by gas meter I(2) with gas meter II(4) export with blower fan (1) and ozonizer (3) respectively and be connected; Ozonizer (3) import connecting fan (1); Rotary packed bed (6) air outlet connects exhaust gas processing device (5); Rotary packed bed (6) fluid inlet is connected with waste water storage tank (9) and reservoir (7) by liquid pump (10), is provided with liquid meter (11) between rotary packed bed (6) fluid inlet and liquid pump (10); Rotary packed bed (6) liquid outlet connects waste water storage tank (9) and reservoir (7), and reservoir (7) connects hydrogen peroxide container for storing liquid (8).
2. a kind of stripping oxidative degradation according to claim 1 is containing the device of high nitrobenzene waste water, it is characterized in that: described rotary packed bed (6) are hypergravity swinging bed device, comprise the rotating packed bed reactor of bed of packings, deflector type or helical channel form, the filler in packing layer comprises the silk screen of metallic substance and non-metallic material, porous plate, waved plate, foam materials or structured packing; The rotating speed of rotary packed bed (6) is 300 ~ 700 rpm.
3. a kind of stripping oxidative degradation according to claim 1 is containing the device of high nitrobenzene waste water, it is characterized in that: the weighting material in exhaust gas processing device (5) is activated carbon.
4. a kind of stripping oxidative degradation according to claim 1 is containing the device of high nitrobenzene waste water, it is characterized in that: stripping stage fresh air and the vapour-liquid ratio of waste water in rotary packed bed (6) are 200 ~ 600 L/m
3; H in waste water in rotary packed bed after completing stripping mass transfer process (6)
2o
2concentration has been 0.1 ~ 2.9 mmol/L, and nitrobenzene is 80 ~ 100mg/L; The liquid-gas ratio of ozone and the middle waste water of hydrogen peroxide concerted reaction process rotary packed bed (6) and ozone is 0.5 ~ 2.0 L/m
3, ozone concn is 10 ~ 30 mg/L.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724852A (en) * | 2015-03-03 | 2015-06-24 | 中北大学 | Method and device for stripping, oxidizing and degrading high-concentration nitrobenzene-containing wastewater |
| CN105923734A (en) * | 2016-05-18 | 2016-09-07 | 中北大学 | On-line single-step method for reducing nitrobenzene sewage through supergravity |
| CN108706674A (en) * | 2018-04-18 | 2018-10-26 | 中北大学 | Hypergravity strengthening extraction-O3/Fe2+Method handles the method and device of high nitrobenzene waste water |
-
2015
- 2015-03-03 CN CN201520122181.5U patent/CN204550271U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724852A (en) * | 2015-03-03 | 2015-06-24 | 中北大学 | Method and device for stripping, oxidizing and degrading high-concentration nitrobenzene-containing wastewater |
| CN104724852B (en) * | 2015-03-03 | 2017-06-27 | 中北大学 | A kind of method and device of stripping oxidative degradation containing high nitrobenzene waste water |
| CN105923734A (en) * | 2016-05-18 | 2016-09-07 | 中北大学 | On-line single-step method for reducing nitrobenzene sewage through supergravity |
| CN108706674A (en) * | 2018-04-18 | 2018-10-26 | 中北大学 | Hypergravity strengthening extraction-O3/Fe2+Method handles the method and device of high nitrobenzene waste water |
| CN108706674B (en) * | 2018-04-18 | 2021-08-17 | 中北大学 | Supergravity enhanced extraction of-O3/Fe2+Method and device for treating high-concentration nitrobenzene wastewater by using method |
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Granted publication date: 20150812 Effective date of abandoning: 20170627 |