CN108640330A - Hypergravity strengthening extraction-catalysis O3/Ti4+Handle the method and device of high nitrobenzene waste water - Google Patents
Hypergravity strengthening extraction-catalysis O3/Ti4+Handle the method and device of high nitrobenzene waste water Download PDFInfo
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- nitrobenzene
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- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000002351 wastewater Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000006555 catalytic reaction Methods 0.000 title claims abstract description 13
- 238000005728 strengthening Methods 0.000 title claims abstract description 13
- 238000000605 extraction Methods 0.000 claims abstract description 28
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 16
- -1 hexamethyleneHexamethylene Chemical group 0.000 claims abstract description 8
- BEJBETAAAVFGOR-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1.[O-][N+](=O)C1=CC=CC=C1 BEJBETAAAVFGOR-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims description 72
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 21
- 238000012546 transfer Methods 0.000 claims description 19
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 6
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000975 dye Substances 0.000 abstract description 2
- 239000002360 explosive Substances 0.000 abstract description 2
- 239000010936 titanium Substances 0.000 description 30
- 239000012071 phase Substances 0.000 description 23
- 239000005416 organic matter Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 238000006385 ozonation reaction Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000010525 oxidative degradation reaction Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000000638 solvent extraction Methods 0.000 description 4
- LCKIEQZJEYYRIY-UHFFFAOYSA-N Titanium ion Chemical compound [Ti+4] LCKIEQZJEYYRIY-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009527 percussion Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007172 homogeneous catalysis Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 208000007502 anemia Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 125000006575 electron-withdrawing group Chemical group 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000000622 liquid--liquid extraction Methods 0.000 description 1
- 208000019423 liver disease Diseases 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/26—Treatment of water, waste water, or sewage by extraction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/38—Gas flow rate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
Abstract
The invention belongs to the technical fields of nitrobenzene waste water processing, insufficient existing for the method for existing treatment of Nitrobenzene waste water to solve, and propose a kind of hypergravity strengthening extraction catalysis O3/Ti4+The method for handling high nitrobenzene waste water.With treatment by extraction high nitrobenzene waste water, makes the reduction of Nitrobenzene in Wastewater concentration, then use O3/Ti4+Method, which is further processed, reaches discharge standard；A concentration of 1000~2000mg/L of high nitrobenzene Nitrobenzene in Wastewater, the extractant used compare V for hexamethyleneHexamethylene：VWaste waterIt is 1:2~2:1, pH is 5~9, and temperature is 25 DEG C, and fluid flow is 40~60L/h.Treatment effeciency improves 20% 30%, and the time shortens 30% 40%, substantially reduces cost of water treatment.Technological process is simple, easy to operate, can be applied to various organic industrial sewages such as explosive waste water, phenol wastewater, waste water from dyestuff, pharmaceutical wastewater etc..
Description
Technical field
The invention belongs to the technical fields of nitrobenzene waste water processing, and in particular to a kind of processing high nitrobenzene waste water
Process, using the coupling processing collective effect of high-gravity technology, extraction and catalytic ozonation technology.
Background technology
Nitrobenzene is commonly used for organic synthesis intermediate, is widely used in the industries such as chemical industry, fuel, material, coking.But nitre
Substituent group nitro in base benzene is electron-withdrawing group, and chemical property is more stable, is not easy to be biodegradable, and can be stable in the presence of water
In body.Once into environment, animal nervous system abnormal symptom, anaemia, liver diseases etc. can be caused, arranged by China
Enter one of 68 kinds of priority pollutants.
The domestic method for handling such waste water mainly has Physical, chemical method and bioanalysis at present.Physical processing contains nitre
When base benzene waste water, nitrobenzene is only transferred to another phase from a phase, and nitrobenzene does not change.It is higher for initial concentration
Nitrobenzene-containing waste water is handled using Physical, can reach the concentration for reducing Nitrobenzene in Wastewater, and can be with recovery section nitre
Base benzene realizes maximum resource utilization.Wherein, extraction has that low energy consumption, water is big for processing, the simple, safe operation of equipment etc.
Advantage uses extensively in the recycling containing benzene ring compound, but for extraction, solvent selection is improper, easily
Lead to secondary pollution；It is extracted in traditional extraction tower or stirring concussion, it is big that there are liquid-drop diameters, and movement velocity is slower,
The problems such as less turbulence is small, and mass transfer force is small in Liquid-liquid Extraction Processes, and mass tranfer coefficient is low, and extraction stage efficiency is low.Chemical method
It is to be converted compared with degradable material hardly degraded organic substance to according to chemical reaction process electron exchange situation.Wherein, ozone is because of it
The advantages that sterilizing ability is strong, non-secondary pollution is widely used in the processing of drinking water and sewage.Pre-Ozonation on Organic Matter
Oxidation has two approach：（1）The direct organic matter of ozone reacts；（2）It is stronger that ozone is broken down into oxidability
With organic matter fast reaction occurs for OH, OH non-selectivity.But ozonation technique still remains some problems, such as：（1）
Ozone direct oxidation reaction selectivity is higher, relatively low with organic matter reaction rate, relatively low to mineralization of organic material degree.In order to solve or
Improve this problem, researcher is improved from ozone, i.e. catalytic ozonation technology, is generated more
OH increases indirect reaction in oxidation and occurs, organic pollutants of degrading.It can be heterogeneous respectively according to the difference of catalyst
Catalytic ozonation technology and homogeneous catalysis ozonation technique.Wherein, homogeneous catalysis ozonation technique（Common catalyst has H2O2、
Transition metal ions（Fe2+、Mn2+、Ti4+、H2O2）Deng）Because reaction condition is mild, oxidation efficiency is high, excellent without catalyst preparation etc.
It puts and is widely studied.（2）The addition of catalyst improves the degradation efficiency of organic matter, but the rate limiting step of degrading waste water
Suddenly for ozone in the mass transfer of gas-liquid interface, solubility is relatively low in water for ozone, this still limits the application of ozone.Hypergravity skill
Art is with rotary packed bed（rotating packed bed, RPB）For carrier, Elevated Gravity is realized on earth.Liquid
It is cut into liquid film, brin, drop, increases phase border surface, while liquid phase border surface is quickly updated, and is greatly strengthened
Mass transport process.Guo Liang etc. studies ozone mass-transfer performance in super gravity field, the results showed that, the rate of dissolution of ozone is bright
It is aobvious to improve, K in rotary packed bed equipmentLA values are K in traditional aeration reaction deviceL2.5 times of a values.Meanwhile for high concentration nitre
For base benzene waste water, the exclusive use of various methods the problems such as there are poor processing effect or high processing costs.
Invention content
The present invention is to solve the method above shortcomings of existing treatment of Nitrobenzene waste water, it is proposed that a kind of hypergravity is strong
Change the technique and device of extraction-ozone high grade oxidation method processing high nitrobenzene waste water.
The present invention adopts the following technical scheme that realization：
The process of high nitrobenzene waste water is handled, its step are as follows：High nitrobenzene waste water is dropped using extraction
As low as a certain concentration, O is then used3/Ti4+Method, which is further processed, reaches discharge standard.A concentration of 1000mg/ of Nitrobenzene in Wastewater
L~2000mg/L, the extractant used are compared for hexamethylene（VHexamethylene：VWaste water）It is 1:2~2:1, pH is 5~9, temperature 25
DEG C, fluid flow is 40L/h~60L/h.
Handle the device of the process of high nitrobenzene waste water, including liquid-liquid mass-transfer equipment, on liquid-liquid mass-transfer equipment
Equipped with inlet, liquid outlet, nozzle, motor, shell, rotor.Liquid in liquid storage groove passes through liquid under the action of pump
Flowmeter is connected with inlet, and liquid outlet is connected with dispenser.Dispenser is equipped with light liquid outlet and heavy liquid exit.
Liquid-liquid mass-transfer equipment is Impinging Stream-Rotating Packed Bed（IS-RPB）, interior rotor is stainless steel cloth filler, a diameter of
0.275mm, internal diameter and outer diameter are respectively 60mm and 160mm, and axial height 60mm, rotating speed is 300~500r/min.Nozzle
（6.3）A diameter of 1.5mm, shock initial velocity are 6.3m/s~9.45m/s.
A concentration of 62.49mg/L~125.85mg/L of Nitrobenzene in Wastewater after extraction, COD be 120.96mg/L~
227.51mg/L。
O3/Ti4+The nitro phenenyl concentration of method processing is 62.49mg/L~125.85mg/L, Ti4+A concentration of 0.2mmol/L~
0.6mmol/L, ozone concentration are 30mg/L~50mg/L, and pH is 3~5, and temperature is 25 DEG C, and fluid flow is 80L/h~160L/
H, gas flow are 30L/h~50L/h.
The device of the process for the treatment of of Nitrobenzene waste water, including gas-liquid mass transfer (contact) equipment, gas-liquid mass transfer (contact) equipment, which is equipped with, to be turned
Son, liquid-inlet, gas feed, liquid outlet, gas vent, liquid distribution trough, motor.Liquid in raffinate phase storage tank is pumping
Under the action of be connected with liquid-inlet by fluid flowmeter, entered in rotor by liquid distribution trough.Pure oxygen passes through from steel cylinder
Ozone generator, by being connected with gas feed after gas flowmeter, gas vent is connected with KI solution storage troughs.
Gas-liquid mass transfer (contact) equipment is rotary packed bed（RPB）, interior rotor is stainless steel cloth filler, and a diameter of 0.275mm is interior
Diameter and outer diameter are respectively 60mm and 160mm, and axial height 60mm, high gravity factor β are 40~120.
RPB-O3/Ti4+Nitro phenenyl concentration is 2.84mg/L~13.5mg/L, COD 32.55mg/L in method processed waste water
~68.55mg/L.
The present invention is jointly processed by high nitrobenzene waste water using high-gravity technology strengthening extraction-catalytic ozonation technology,
It is allowed to obtain preferable treatment effect in a short time.Compared with prior art, treatment effeciency improves 20%-30%, time contracting
Short 30%-40%, substantially reduces cost of water treatment.
The present invention has the advantages that：Technological process is simple, easy to operate, by high-gravity technology and extraction-catalysis
Ozonation technique is combined, and is solved the problems, such as that present technology is existing, is reduced cost of water treatment, can be applied to various organic
Industrial wastewater such as explosive waste water, phenol wastewater, waste water from dyestuff, pharmaceutical wastewater etc..
Description of the drawings
Fig. 1 is treatment by extraction high nitrobenzene waster water process flow chart；
Fig. 2 is knockout structural representation；
Fig. 3 is Impinging Stream-Rotating Packed Bed structural schematic diagram；
Fig. 4 is RPB-O3/Ti4+Method handles raffinate phase process flow chart.
Fig. 5 is rotary packed bed structural schematic diagram.
In figure：1- liquid storage grooves I, 2- liquid pumps I, 3- fluid flowmeters I, 4- liquid pumps II, 5- fluid flowmeters II, 6- liquid liquid
Mass transfer apparatus, 7- liquid storage grooves II, 8- mixer-settlers, 9- pure oxygen steel cylinders, 10- ozone generators, 11- gas flowmeters, 12-
Gas-liquid mass transfer (contact) equipment, 13- fluid flowmeters III, 14- liquid pumps III, 15- raffinate phase storage tanks, 16-KI solution storage troughs
6.1- Impinging Stream-Rotating Packed Bed liquid-inlets, 6.2- Impinging Stream-Rotating Packed Bed liquid outlets, 6.3- nozzles, 6-4
Motor I, 6.5- shells, 6.6- Impinging Stream-Rotating Packed Bed rotors
8.1- light liquids export, 8.2- heavy liquid exits
The rotary packed bed rotors of 12.1-, the rotary packed bed gas feeds of 12.2-, 12.3- liquid distribution troughs, 12.4- rotate filler
Bed liquid-inlet, the rotary packed bed liquid outlets of 12.5-, the rotary packed bed gas vents of 12.6-, 12.7- motors II.
Specific implementation mode
The specific implementation mode of the present invention is described further in conjunction with attached drawing.
A kind of process of processing high nitrobenzene waste water, steps are as follows：Using extraction by high nitrobenzene
Waste water is reduced to a certain concentration, then uses RPB-O3/Ti4+Method, which is further processed, reaches discharge standard.
As shown in Figure 1, Figure 2 and Figure 3, the process and device for the treatment of by extraction high nitrobenzene waste water, step is such as
Under：Nitrobenzene waste water and hexamethylene are respectively placed in storage tank I 1 and storage tank II 7, and liquid passes through under the action of pumping I 2 and II 4 respectively
Enter in Impinging Stream-Rotating Packed Bed 6 after crossing spinner flowmeter I 3 and II 5.After two liquid enter Impinging Stream-Rotating Packed Bed 6
First by nozzle 6.3, two liquid are hit in opposite directions forms the shock cloudy surface vertical with former fluid flow direction, increases liquid table
Area simultaneously promotes Surface Renewal, to increase delivery rate.It then hits the cloudy surface formed and enters Impinging Stream-Rotating Packed Bed 6
Rotor 6.6 in, the shearing of the filler that is rotated becomes liquid infinitesimal（Liquid film, liquidus, brin or drop）, these liquid infinitesimal meetings
Multiple coalescence, dispersion process, liquid-liquid transfer motive force are continuously rapidly undergone, mass tranfer coefficient improves, and extraction efficiency significantly increases
Add.Final liquid is thrown on shell 6.5, is passed through liquid outlet 6.2 under gravity and is entered in dispenser 8, raffinate phase
It is flowed out from heavy liquid exit 8.2, Nitrobenzene in Wastewater content is greatly lowered.
As shown in Figure 4 and Figure 5, RPB-O3/Ti4+Method handles the technique and device of raffinate phase waste water, and steps are as follows：Steel cylinder 9
In pure oxygen through ozone generator 10 generate contain certain density ozone/oxygen mixture, through gas flowmeter 11 metering after
Into in rotary packed bed 12, filler is extended axially through.By Ti4+It is dissolved in raffinate phase to be placed in raffinate phase storage tank 15, in pump III
Enter in rotary packed bed 12 by fluid flowmeter III 13 under 14 ringings.Liquid is sprayed at by liquid distribution trough 12.3
12.1 inner edge of rotor, is radially thrown away by the inner edge of filler, shears liquid infinitesimal by filler by liquid in the process（Liquid film,
Liquidus, brin or drop）, and contacted with containing a certain concentration ozone gas cross-flow, complete and enhance the mass transfer and oxygen of ozone
Change reaction.Liquid is thrown to after shell and flow back into raffinate phase storage tank 15 from liquid outlet 12.5, is recycled.Unreacted ozone
Gas enters in KI solution storage troughs 16, is absorbed by KI solution.
Embodiments of the present invention are described further with reference to specific embodiment.
Embodiment 1：The nitrobenzene waste water for the treatment of by extraction 1L concentration 1000mg/L.By the nitrobenzene waste water configured and extraction
Take agent hexamethylene to be respectively placed in two reservoirs, compared to（VHexamethylene：VWaste water）It is 1:2, rotating speed N=500r/min, wastewater flow Qa=
60L/h, pH=5, temperature T=25 DEG C, two liquid knockout initial velocity be 9.45m/s under conditions of in Impinging Stream-Rotating Packed Bed into
Cross current solvent extraction of row.The result shows that waste water（Raffinate phase）Middle nitrobenzene is reduced to 62.49mg/L, nitrobenzene removal rate
Reach 93.75%, extraction stage efficiency 98.18%.Under close experiment condition, extraction experiments, nitre are carried out in percussion flow extractor
Base benzene removal rate is 81.68%, and extraction stage efficiency 83.33% reduces 12.07% He compared with Impinging Stream-Rotating Packed Bed respectively
14.85%.Utilize RPB-O3/Ti4+Method is further processed raffinate phase solution（CNB=62.49mg/L, COD=120.96mg/L）.In pH
=3, high gravity factor β=100, T=25 DEG C, fluid flow Qa=80L/h, titanium ion concentration CTI 4+=0.2mmol/L, gas flow QG
=30L/h, ozone mass concentration CO3=50mg/L, under conditions of recycling 30min, rotary packed bed middle Ti4+It is catalyzed O3Oxidative degradation
Organic matter in raffinate phase（RPB-O3/Ti4+）, nitrobenzene is 12.97mg/L, COD=40.05mg/L after processing.Close experiment
Under the conditions of, it is bubbled in reaction unit in tradition and carries out Ti4+It is catalyzed O3Organic matter is tested in oxidative degradation raffinate phase（BR-O3/Ti4 +）.RPB-O3/Ti4+With BR-O3/Ti4+It compares, nitrobenzene removal rate improves 22.67%, COD removal rates and improves 27.91%.
Embodiment 2：The nitrobenzene waste water for the treatment of by extraction 1L concentration 1500mg/L.By the nitrobenzene waste water configured and extractant
Hexamethylene is respectively placed in two reservoirs, compared to（VHexamethylene：VWaste water）It is 1:1, rotating speed N=400r/min, wastewater flow Qa=50L/
H, pH=7, temperature T=25 DEG C, two liquid knockout initial velocity carry out one under conditions of being 7.88 m/s in Impinging Stream-Rotating Packed Bed
Secondary cross current solvent extraction.The result shows that waste water（Raffinate phase）Middle nitrobenzene is reduced to 75.06mg/L, nitrobenzene removal rate to reach
94.93%, extraction stage efficiency 99.99%.Under close experiment condition, extraction experiments, nitrobenzene are carried out in percussion flow extractor
Removal rate is 80.88%, and extraction stage efficiency 82.03% reduces 14.05% He compared with Impinging Stream-Rotating Packed Bed respectively
17.96%.Utilize RPB-O3/Ti4+Method is further processed raffinate phase solution（CNB=76.05mg/L, COD=139.9mg/L）.PH=
4, high gravity factor β=80, T=25 DEG C, fluid flow Qa=120L/h, titanium ion concentration CTI 4+=0.4mmol/L, gas flow QG=
40L/h, ozone mass concentration CO3=36mg/L, under conditions of recycling 30min, rotary packed bed middle Ti4+It is catalyzed O3Oxidative degradation extracts
Organic matter in remaining phase（RPB-O3/Ti4+）, nitrobenzene is 2.84mg/L, COD=32.55mg/L after processing.Close experiment item
Under part, it is bubbled in reaction unit in tradition and carries out Ti4+It is catalyzed O3Organic matter is tested in oxidative degradation raffinate phase（BR-O3/Ti4+）.
RPB-O3/Ti4+With BR-O3/Ti4+It compares, nitrobenzene removal rate improves 23.1%, COD removal rates and improves 29.84%.
Embodiment 3：The nitrobenzene waste water for the treatment of by extraction 1L concentration 2000mg/L.By the nitrobenzene waste water configured and extractant
Hexamethylene is respectively placed in two reservoirs, compared to（VHexamethylene：VWaste water）It is 2:1, rotating speed N=300r/min, wastewater flow Qa=40L/
H, pH=9, temperature T=25 DEG C, two liquid knockout initial velocity carry out primary in Impinging Stream-Rotating Packed Bed under conditions of being 6.3m/s
Cross current solvent extraction.The result shows that waste water（Raffinate phase）Middle nitrobenzene is reduced to 125.85mg/L, nitrobenzene removal rate to reach
93.71%, extraction stage efficiency 98.68%.Under close experiment condition, extraction experiments, nitrobenzene are carried out in percussion flow extractor
Removal rate is 79.43%, and extraction stage efficiency 81.56% reduces 14.28% He compared with Impinging Stream-Rotating Packed Bed respectively
17.12%.Utilize RPB-O3/Ti4+Method is further processed raffinate phase solution（CNB=125.85mg/L, COD=227.51mg/L）.
PH=5, high gravity factor β=60, T=25 DEG C, fluid flow Qa=160L/h, titanium ion concentration CTI 4+=0.6mmol/L, gas flow
QG=50L/h, ozone mass concentration CO3=30mg/L, under conditions of recycling 30min, rotary packed bed middle Ti4+It is catalyzed O3Oxidation drop
Solve organic matter in raffinate phase（RPB-O3/Ti4+）, nitrobenzene is only 0.85mg/L, COD=48.6mg/L after processing.Close reality
Under the conditions of testing, it is bubbled in reaction unit in tradition and carries out Ti4+It is catalyzed O3Organic matter is tested in oxidative degradation raffinate phase（BR-O3/Ti4 +）.RPB-O3/Ti4+With BR-O3/Ti4+Compared to compared to nitrobenzene removal rate improves 22.6%, COD removal rates and improves
27.43%。
Claims (9)
1. a kind of hypergravity strengthening extraction-catalysis O3/Ti4+The method for handling high nitrobenzene waste water, it is characterised in that：Using
Treatment by extraction high nitrobenzene waste water makes the reduction of Nitrobenzene in Wastewater concentration, then uses O3/Ti4+Method is further processed
Reach discharge standard；A concentration of 1000mg/L~2000mg/L of high nitrobenzene Nitrobenzene in Wastewater, the extractant used for
Hexamethylene compares VHexamethylene：VWaste waterIt is 1:2~2:1, pH is 5~9, and temperature is 25 DEG C, and fluid flow is 40L/h~60L/h.
2. a kind of hypergravity strengthening extraction-catalysis O according to claim 13/Ti4+Handle high nitrobenzene waste water
Method, it is characterised in that：A concentration of 62.49mg/L~125.85mg/L of Nitrobenzene in Wastewater after extraction, COD 120.96mg/L
~227.51mg/L.
3. a kind of hypergravity strengthening extraction-catalysis O according to claim 13/Ti4+Handle high nitrobenzene waste water
Method, it is characterised in that：O3/Ti4+The nitro phenenyl concentration of method processing is 62.49mg/L~125.85mg/L, Ti4+It is a concentration of
0.2mmol/L~0.6mmol/L, ozone concentration are 30mg/L~50mg/L, and pH is 3~5, and temperature is 25 DEG C, and fluid flow is
80L/h~160L/h, gas flow are 30L/h~50L/h.
4. a kind of realization any one hypergravity strengthening extraction-catalysis O as described in Claims 1-43/Ti4+Handle high concentration nitre
The device of base benzene method for waste water, it is characterised in that：Including liquid-liquid mass-transfer equipment（6）, liquid-liquid mass-transfer equipment（6）It is equipped with inlet
（6.1）, liquid outlet（6.2）, nozzle（6.3）, motor（6.4）, shell（6.5）, rotor（6.6）；Liquid storage groove I（1）And liquid
Body storage tank II（7）Pass through liquid pump I（2）With liquid pump II（4）, fluid flowmeter I（3）With fluid flowmeter II（5）With inlet
（6.1）It is connected, liquid outlet（6.2）With mixer-settler（8）It is connected.
5. realization hypergravity strengthening extraction-catalysis O according to claim 43/Ti4+Handle high nitrobenzene waste water side
The device of method, it is characterised in that：Mixer-settler（8）It is exported equipped with light liquid（8.1）And heavy liquid exit（8.2）.
6. realization hypergravity strengthening extraction-catalysis O according to claim 53/Ti4+Handle high nitrobenzene waste water side
The device of method, it is characterised in that：The liquid-liquid mass-transfer equipment（6）For Impinging Stream-Rotating Packed Bed（IS-RPB）, rotor
（6.6）Interior is stainless steel cloth filler, and a diameter of 0.275mm, internal diameter and outer diameter are respectively 60mm and 160mm, axial height
60mm, rotating speed are 300~500r/min；Nozzle（6.3）A diameter of 1.5mm, shock initial velocity are 6.3m/s~9.45m/s.
7. a kind of realizing hypergravity strengthening extraction-catalysis O as described in claim 13/Ti4+Handle high nitrobenzene waste water
The device of method, it is characterised in that：Including gas-liquid mass transfer (contact) equipment（12）, gas-liquid mass transfer (contact) equipment（12）It is equipped with rotor（12.1）、
Liquid-inlet（12.4）, gas feed（12.2）, liquid outlet（12.5）, gas vent（12.6）, liquid distribution trough（12.3）、
Motor（12.7）；Raffinate phase storage tank（15）Pass through liquid pump III（14）, fluid flowmeter III（13）With liquid-inlet（12.4）Phase
Even, pass through liquid distribution trough（12.3）Into rotor（12.1）In；Pure oxygen is from steel cylinder（9）By ozone generator（10）, pass through
Gas flowmeter（11）Afterwards with gas feed（12.2）It is connected, gas vent（12.5）With KI solution storage troughs（16）It is connected.
8. realization hypergravity strengthening extraction-catalysis O according to claim 73/Ti4+Handle high nitrobenzene waste water side
The device of method, it is characterised in that：The gas-liquid mass transfer (contact) equipment（12）It is rotary packed bed（RPB）, rotor（12.1）Interior is not
Become rusty steel wire filler, a diameter of 0.275mm, and internal diameter and outer diameter are respectively 60mm and 160mm, axial height 60mm, hypergravity because
Sub- β is 60~100.
9. realization hypergravity strengthening extraction-catalysis O according to claim 83/Ti4+Handle high nitrobenzene waste water side
The device of method, it is characterised in that：RPB-O3/Ti4+Nitro phenenyl concentration is 2.84mg/L~13.5mg/L in method processed waste water,
COD is 32.55mg/L~68.55mg/L.
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