CN221071241U - Coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device - Google Patents
Coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device Download PDFInfo
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- CN221071241U CN221071241U CN202321028861.1U CN202321028861U CN221071241U CN 221071241 U CN221071241 U CN 221071241U CN 202321028861 U CN202321028861 U CN 202321028861U CN 221071241 U CN221071241 U CN 221071241U
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 67
- 230000003647 oxidation Effects 0.000 title claims abstract description 65
- 239000012028 Fenton's reagent Substances 0.000 title claims abstract description 62
- 239000012528 membrane Substances 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000011282 treatment Methods 0.000 title claims abstract description 28
- 238000002474 experimental method Methods 0.000 title claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 80
- 238000005345 coagulation Methods 0.000 claims abstract description 55
- 230000015271 coagulation Effects 0.000 claims abstract description 55
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims abstract description 33
- 238000005374 membrane filtration Methods 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 12
- 239000008394 flocculating agent Substances 0.000 claims abstract description 7
- 241000894006 Bacteria Species 0.000 claims abstract description 5
- 239000002957 persistent organic pollutant Substances 0.000 claims abstract description 4
- 230000003334 potential effect Effects 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 3
- 230000001376 precipitating effect Effects 0.000 claims abstract description 3
- 239000011550 stock solution Substances 0.000 claims abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 65
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 64
- 229910052742 iron Inorganic materials 0.000 claims description 32
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 15
- 239000006228 supernatant Substances 0.000 claims description 15
- 230000007935 neutral effect Effects 0.000 claims description 9
- 238000001556 precipitation Methods 0.000 claims description 8
- 239000012085 test solution Substances 0.000 claims description 7
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 4
- 239000000413 hydrolysate Substances 0.000 claims description 4
- 239000000047 product Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 2
- 238000009292 forward osmosis Methods 0.000 claims description 2
- 238000001223 reverse osmosis Methods 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 claims 1
- 230000001112 coagulating effect Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000004062 sedimentation Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005457 optimization Methods 0.000 abstract description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 20
- 238000003756 stirring Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 3
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- 238000006731 degradation reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000011284 combination treatment Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003411 electrode reaction Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
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- 239000008223 sterile water Substances 0.000 description 2
- 239000011882 ultra-fine particle Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- MGZTXXNFBIUONY-UHFFFAOYSA-N hydrogen peroxide;iron(2+);sulfuric acid Chemical compound [Fe+2].OO.OS(O)(=O)=O MGZTXXNFBIUONY-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- -1 hydroxyl free radical Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device comprises a coagulation reaction zone, a Fenton reagent oxidation zone and an ultrafiltration membrane separation zone; the coagulation reaction zone is used for removing suspended particles in the stock solution through physical and chemical actions after adsorbing and precipitating by adding a flocculating agent; the Fenton reagent oxidation zone is used for generating free radicals with high potential activity to remove refractory organic pollutants through chemical oxidation of the Fenton reagent; the ultrafiltration membrane separation zone is used for intercepting bacteria and substances with molecular weight of more than 1000 daltons through membrane filtration separation, so that the effluent reaches zero turbidity. The utility model realizes the selection and optimization of water quality diversification treatment means by coagulating sedimentation, fenton reagent oxidation and modern membrane filtration separation technology, so as to improve the water quality treatment effect capability of the water body.
Description
Technical Field
The utility model belongs to the technical field of water treatment, and particularly relates to a coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device.
Background
The rapid development of industrial society, some waste water which is difficult to degrade or after biochemical treatment becomes a difficult focus of water pollution control. Meanwhile, the continuous emergence of emerging technologies enables a method for solving the problem of difficult degradation and high-harm sewage and optimization thereof to have various selection requirements.
The application and development of advanced oxidation technologies AOPS such as photocatalysis, fenton reagent and the like play an important role in treating water quality degradation-resistant pollutants. The reaction mechanism of Fenton reagent oxidation is that Fe 2+ is used for catalyzing H 2O2 to generate hydroxyl free radical OH with strong oxidability under the acidic condition. OH has high oxidation potential activity and can oxidize and degrade various organic pollutants.
The coagulating sedimentation technology mainly utilizes the physicochemical effect of the flocculating agent to adsorb suspended pollutants, and has smaller effect on dissolved pollutants. Organic matters which are difficult to degrade or after biochemical treatment, and high-potential hydroxyl free radicals generated by Fenton reagent have better oxidation effect. Because Fenton reagent oxidation economic cost is high, pretreatment such as coagulating sedimentation of test solution is needed to improve degradation effect, so that the utilization rate of Fenton oxidation reaction is improved. And Fenton's reagent oxidation produces a large amount of iron sludge by-product.
Disclosure of utility model
In order to overcome the technical problems, the utility model aims to provide the coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device, which realizes the selection and optimization of water quality diversification treatment means through coagulation precipitation and membrane filtration separation technology so as to improve the water quality treatment effect of the water body.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device comprises a coagulation reaction zone, a Fenton reagent oxidation zone and an ultrafiltration membrane separation zone;
The coagulation reaction zone is used for removing suspended particles in the stock solution through physical and chemical actions after adsorbing and precipitating by adding a flocculating agent;
The Fenton reagent oxidation zone is used for generating free radicals with high potential activity to remove refractory organic pollutants through chemical oxidation of the Fenton reagent;
The ultrafiltration membrane separation zone is used for intercepting bacteria and substances with molecular weight larger than 1000 daltons through membrane filtration separation, so that the effluent reaches zero turbidity;
The coagulation reaction zone is connected with the Fenton reagent oxidation zone through a three-way valve I4-1, and the three-way valve I4-1 is used for coordinating and switching the hydraulic circulation of the coagulation reaction zone and transferring the supernatant fluid after reaction into the Fenton reagent oxidation zone;
the Fenton reagent oxidation zone is connected with the ultrafiltration membrane separation zone through a three-way valve II 4-2, after the pH value of the test solution in the Fenton reagent oxidation zone is adjusted, the generated iron mud is converted and refluxed into coagulating sedimentation in the coagulating reaction zone for use, and meanwhile, the generated supernatant meets the requirements of drainage and the filtration efficiency of the ultrafiltration membrane separation zone is protected.
The coagulation reaction zone comprises a coagulation reactor L-11, wherein a submerged pump I P3-1 is arranged in the coagulation reactor L-11, and the submerged pump I P3-1 manages the submerged pump I P3-1 through a time controller I2-1 to set reaction time; the top of the coagulation reactor L-11 is communicated with a first reagent pump 1-1 through a pipeline, and the first reagent pump 1-1 adds the flocculant in the first reagent tank 6 into the coagulation reactor L-11.
The inside of the coagulation reactor L-11 is provided with a pH meter I5-1, and the pH meter I5-1 value indicates and controls the dosage of the flocculant of a reagent pump I1-1 and a reagent tank I6.
The coagulation reactor L-11 is connected with the Fenton reaction container L-12 through a three-way valve I4-1, and the three-way valve I4-1 is used for coordinating and switching the hydraulic circulation of the coagulation reactor L-11 and transferring the supernatant test solution after the reaction into the Fenton reaction container L-12.
The Fenton reagent oxidation zone comprises a Fenton reaction container L-12, wherein a submerged pump II P3-2 and an iron plate anode 10-2 are arranged in the Fenton reaction container L-12, and the submerged pump II P3-2 is connected with a three-way valve II 4-2; the top of the Fenton reaction vessel L-12 is provided with a direct current power supply 10-1, and an iron plate anode 10-2 is respectively connected with the positive electrode and the negative electrode of the adjustable direct current power supply 10-1; the Fenton reaction vessel L-12 is provided with a third reagent pump 1-2, and the Fenton reagent in the second reaction reagent tank 7 is drawn by the third reagent pump 1-2 and quantitatively added into the Fenton reaction vessel L-12; the direct current power supply 10-1 applies a voltage current to the iron plate anode 10-2 so as to generate a ferrous catalyst.
The ultrafiltration membrane separation zone is internally provided with a membrane filtration separator, the membrane filtration separator is connected with the coagulation reactor L-11 and the Fenton reaction vessel L-12 through a three-way valve II 4-2, the iron mud after Fenton reaction is returned into the coagulation reactor L-11 through a submersible pump II P3-2 arranged at the bottom of the Fenton reaction vessel L-12, and the supernatant fluid is subjected to membrane separation filtration, so that zero turbidity and aseptic treatment of water quality are carried out.
And a second submersible pump P3-2 is arranged in the Fenton reagent oxidation zone, and neutral supernatant liquid after Fenton reagent reaction is subjected to membrane filtration separation with 0.01um pore space by the second submersible pump P3-2 so as to ensure zero-turbidity sterile safe water outlet.
The Fenton reaction vessel L-12 is provided with a second reagent pump 1-3, the second reagent pump 1-3 is used for adding a third alkaline reagent 8 into the Fenton reaction vessel L-12, the third alkaline reagent is used for eliminating ferrous ions in a Fenton oxidation zone after reaction, and the second pH meter 5-2 is used for monitoring and indicating a requirement value of neutral water to promote ferrous iron to be converted into ferric hydrolysate with small solubility product and more complete precipitation.
One end of the second three-way valve 4-2 is communicated with the Fenton reaction container L-12, and the other end of the second three-way valve is connected with an UF inlet of the ultrafiltration membrane.
The coagulated flocculant in the first reagent tank 6 is various flocculants such as iron-based or aluminum-based.
The membrane separation in the ultrafiltration membrane separation zone is any one of ultrafiltration UF, forward osmosis membrane FO and reverse osmosis membrane RO, and the material is not limited.
UF pores of the ultrafiltration membrane cut 1000 daltons with a molecular weight of 0.01um, and retain bacteria and substances with a molecular weight greater than 1000 daltons, so that the effluent reaches zero turbidity.
Fenton reagent in the second reagent tank 7 is oxidized into electro-Fenton and photo-Fenton generated by hydrogen peroxide catalyzed by ferrous iron or other hydroxyl free radicals.
The utility model has the beneficial effects that:
The utility model comprehensively utilizes each single technology and parameter combination to selectively carry out physical and chemical oxidation treatment on the refractory organic matters. The byproduct iron mud at the oxidation rear end of the Fenton reagent can be returned to the front-stage coagulation reaction zone for reflux use through the design of a three-way valve; the coagulation reaction conditions are equal to the oxidized pH value of the Fenton reagent, and the adding amount of the coagulation reagent is controlled according to the pH value indication; the discharged water after the Fenton reagent oxidation is subjected to pH value adjustment, is further and completely precipitated by utilizing byproducts, and is refluxed for coagulating sedimentation, and the membrane filtration and the water discharge are facilitated. Provides experimental methods of multiple technologies such as coagulating sedimentation, fenton reagent oxidation, ultrafiltration membrane filtration and the like and combination modes thereof for comprehensive treatment of the water quality of complex refractory water bodies.
The utility model can coordinate coagulation reaction and Fenton reagent oxidation reaction to be consistent through pH value adjustment of the test solution, and the reagent after Fenton reagent reaction is precipitated and converted, and the reaction is returned to coagulation precipitation at the front end for use. Meanwhile, the water drainage and the ultrafiltration membrane filtration efficiency protection are met. The utility model can conveniently coordinate coagulating sedimentation, fenton reagent oxidation and membrane filtration separation technology and the optimized combination thereof.
Drawings
FIG. 1 is a flow chart of the present utility model.
FIG. 2 is a schematic diagram of the coagulation-Fenton-membrane separation process of the present utility model.
FIG. 3 is a schematic illustration of a Fenton-membrane separation scheme.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples.
As shown in fig. 1: an experimental regulation and control device for coagulation-membrane separation-Fenton reagent oxidation integrated water treatment, comprising: a coagulation reaction zone, an electro-Fenton reagent oxidation zone and an ultrafiltration membrane separation zone,
A coagulation reactor L-11 is arranged in the coagulation reaction zone, and a pH meter I5-1 detects and indicates the amount of a reagent such as polymeric ferric sulfate added into a reagent tank I6 by a reagent pump I1-1; the three-way valve I4-1 is used for switching the flow path of the test solution or forming a hydraulic stirring loop with the coagulation reactor L-11 or being connected with the Fenton reaction vessel L-12. The first controller 2-1 manages the operation of the first submerged pump P3-1.
The Fenton reagent oxidation zone comprises a Fenton reaction container L-12, and a built-in iron plate anode 10-2 is connected with a direct current power supply 10-1; the third reagent pump 1-2 regulates the second reagent 7 added with hydrogen peroxide reagent for Fenton reaction; the time controller 2-2 manages the air generator 9-1 to form the air flow 9-2 at the bottom of the iron plate electrode to stir, and promotes the electrode reaction to generate ferrous ions and hydrogen peroxide. And according to the detection indication of the second pH meter 5-2, the third reagent 8 added with the strong alkali reagent is adjusted to the neutral pH value by the second reagent pump 1-3. Further coagulating sedimentation is carried out by high-iron (trivalent) hydrolysis.
The ultrafiltration membrane UF is arranged in the ultrafiltration membrane separation area, and is selected by a three-way valve II 4-2, the Fenton oxidized and coagulated iron sludge is returned to the coagulation reactor L-11 for use by a submersible pump II P3-2 arranged at the bottom of the Fenton reaction container L-12, and then supernatant fluid is cut and separated by the molecular weight of the ultrafiltration membrane, so that zero turbidity sterile water discharge is achieved.
The flow path conversion, stirring and homogenizing, detection and control can be combined and designed in different modes.
The utility model is a single method regulation experiment of coagulation, ultrafiltration and Fenton reagent oxidation, and can also be combined in each way, and the flow path of a pump is switched through a three-way valve, so that a detection regulation setting scheme required by a tissue is realized.
Example 1: coagulation-Fenton-ultrafiltration membrane water treatment combination:
As shown in fig. 1-2, the matching device relates to a coagulation reactor L-11, a Fenton reaction vessel L-12, two pH meters, two submersible pumps, two time controllers, three reagent pumps, an air generator and a set of adjustable straight power supply which are arranged on an iron plate electrode reactor supported on the top of the device;
The first reagent is polymeric ferric sulfate, the second reagent is hydrogen peroxide and the third reagent is sodium hydroxide solution.
The pH value required for the Fenton reaction indicates the setting of the coagulation reactor L-11. And adjusting the three-way valve I4-1 to be in a reflux state of the coagulation reactor L-11 operated at the left side, starting the time controller I2-1, starting the reagent pump I1-1 to draw the reagent in the reagent tank I6, and adding the reagent into the coagulation reactor L-11 to perform hydraulic mixing.
When the pH value is monitored to be close to the set value of the reactor test solution, the transmitter outputs to control the reagent pump I to continuously charge the reagent pump I1-1. Setting the submerged pump P1 to execute the coagulation reaction time by the first time controller 2-1; after the precipitation is stationary, the flow path of the three-way valve 1 is switched to the L-2 Fenton oxidation zone b on the right side, and the time controller 1 is started again to drive the submersible pump P1 to transfer the supernatant liquid precipitated in the L-1 coagulation reaction zone a into the Fenton oxidation zone b of the Fenton reaction vessel L-12.
Adjusting the voltage and current of the direct current power supply 10-1 suitable for the corresponding iron plate anode 10-2 to oxidize the iron plate anode to generate ferrous iron; the time controller 2-2 operates the Fenton oxidation zone b of the Fenton reaction vessel L-12 by pneumatically stirring the air generator 9-1, and determines the reaction time; and the third reagent pump 1-2 is used for adding the second required hydrogen peroxide reagent 7 at one time. Meanwhile, the iron plate anode 10-2 and dissolved oxygen DO in the aeration environment also generate partial hydrogen peroxide. And adding a third alkaline reagent 8 into the second reagent pump 1-3 by utilizing ferrous ions existing in the Fenton oxidation zone b after the reaction until the pH meter II is 5-2, and monitoring and indicating a neutral water outlet requirement value. Promote the ferrous iron to be converted into ferric iron hydrolysate with small solubility product and more complete precipitation. An appropriate amount of PAM flocculant (on the order of ppm) may also be added to increase the settling rate of the ultrafine particles.
Switching the three-way valve II 4-2 to the left side, starting the submersible pump II P3-2 arranged at the bottom of the Fenton reaction vessel L-12, and transferring the iron sludge in the Fenton oxidation zone into a coagulation reaction zone of the coagulation reactor L-11 for iron-based coagulation adsorption; and then, switching the three-way valve II 4-2 to the right side, and starting the submerged pump II P3-2 again to carry out UF filtration separation on neutral supernatant liquid by using an ultrafiltration membrane with a pore of 0.01um so as to ensure zero turbidity and sterile safe water outlet.
Example 2
Fenton-ultrafiltration water treatment combination
As shown in fig. 3, the matching device relates to a Fenton reaction container L-12, a second pH meter 5-2, a second submersible pump P3-2, a time controller 2-2, two reagent pumps, an air generator 9-1 and a set of adjustable direct current power supply arranged on an iron plate electrode reactor supported on the top of the device;
the reagent in the second reagent tank 7 is hydrogen peroxide and the reagent III 8 is sodium hydroxide solution.
Adding the sample liquid in the pH range required by Fenton reagent oxidation into a Fenton reaction container L-12, and adjusting the voltage and current of a direct current power supply 10-1 conforming to the corresponding electrode reaction so as to oxidize an iron plate anode 10-2 to generate ferrous iron; the time controller 2-2 operates the air generating device 9 to pneumatically stir the Fenton oxidation zone of the Fenton reaction vessel L-12 and determine the reaction time; and the required hydrogen peroxide reagent is added into the three reagent pumps 1-2 at one time. Meanwhile, the iron plate electrode reacts with dissolved oxygen DO in an aeration environment to generate partial hydrogen peroxide.
By utilizing ferrous ions existing in the Fenton oxidation area after the reaction, the second reagent pump 1-3 adds a third reagent 8 of strong alkali reagent, to a pH meter II of 5-2, the neutral water outlet requirement value is monitored and indicated. Promote the ferrous iron to be converted into ferric iron hydrolysate with small solubility product and more complete precipitation. An appropriate amount of PAM flocculant (on the order of ppm) may also be added to increase the settling rate of the ultrafine particles.
And (3) placing the second three-way valve 4-2 in an ultrafiltration membrane UF flow path on the right side, starting the submerged pump P3-2 to carry out ultrafiltration membrane UF filtration separation on neutral supernatant liquid after Fenton reagent reaction by using an ultrafiltration membrane with a pore of 0.01um so as to ensure zero turbidity sterile safe water outlet. The excessive iron mud in the Fenton oxidation area is suitable for the iron-based coagulant, the three-way valve II 4-2 can be switched to the left side, and the submersible pump II P3-2 arranged at the bottom of the Fenton reaction vessel L-12 is started for periodic cleaning.
The function of each reaction zone in the utility model:
The function of the coagulation reaction zone is that the reaction time is controlled by a first time controller 2-1; the pH meter I5-1 detects the amount of the reagent I added by the reagent pump P3-1, and the reflux stirring and the sample solution switching are completed by the three-way valve I4-1.
And the function of the Fenton reagent oxidation zone is that the iron plate anode 10-2 is regulated and controlled to dissolve through the direct current power supply 10-1, so that the generation of fresh ferrous iron is completed. And the third reagent pump 1-2 quantitatively provides the second hydrogen peroxide reagent 7. The time controller 2-2 operates the management air generator 9-1 and stirs the reaction process at the bottom gas outlet 9-2 of the iron anode 10-2.
The function of the ultrafiltration membrane separation area, the pH meter II 5-2 can instruct the reagent pump II 1-3 to add the alkali liquor reagent III 8 so as to meet the water quality and water outlet requirement, and under the action of the submersible pump II P3-2, the three-way valve II 4-2 is switched and selected to realize that the bottom iron mud flows back to the coagulation reactor or the supernatant after Fenton reaction reaches zero turbidity sterile water outlet discharge through ultrafiltration UF.
Claims (10)
1. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device is characterized by comprising a coagulation reaction zone, a Fenton reagent oxidation zone and an ultrafiltration membrane separation zone;
The coagulation reaction zone is used for removing suspended particles in the stock solution through physical and chemical actions after adsorbing and precipitating by adding a flocculating agent;
The Fenton reagent oxidation zone is used for generating free radicals with high potential activity to remove refractory organic pollutants through chemical oxidation of the Fenton reagent;
The ultrafiltration membrane separation zone is used for intercepting bacteria and substances with molecular weight larger than 1000 daltons through membrane filtration separation, so that the effluent reaches zero turbidity;
The coagulation reaction zone is connected with the Fenton reagent oxidation zone through a first three-way valve (4-1), and the first three-way valve (4-1) is used for coordinating and switching the hydraulic circulation of the coagulation reaction zone and transferring the supernatant fluid after reaction into the Fenton reagent oxidation zone;
The Fenton reagent oxidation zone is connected with the ultrafiltration membrane separation zone through a three-way valve II (4-2), after the pH value of the test solution in the Fenton reagent oxidation zone is adjusted, the generated iron mud is converted and refluxed into coagulation precipitation in the coagulation reaction zone for use, and meanwhile, the generated supernatant meets the requirements of drainage and the filtration efficiency of the ultrafiltration membrane separation zone is protected;
the ultrafiltration membrane (UF) pores are of 0.01um cut-off molecular weight 1000 daltons.
2. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 1, wherein the coagulation reaction zone comprises a coagulation reactor (L-11), a first submersible pump (P3-1) is arranged in the coagulation reactor (L-11), and the first submersible pump (P3-1) is used for managing the first submersible pump (P3-1) through a first time controller (2-1) to set reaction time; the top of the coagulation reactor (L-11) is communicated with a first reagent pump (1-1) through a pipeline, and the first reagent pump (1-1) is used for adding the flocculating agent in the first reagent tank (6) into the coagulation reactor (L-11).
3. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 2, wherein a first pH meter (5-1) is arranged in the coagulation reactor (L-11), and the value of the first pH meter (5-1) indicates the dosage of the flocculating agent for controlling the first reagent pump (1-1) to draw the first reagent tank (6).
4. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 2, wherein the coagulation reactor (L-11) is connected with the Fenton reaction vessel (L-12) through a three-way valve I (4-1), and the three-way valve I (4-1) is used for coordinating and switching the hydraulic circulation of the coagulation reactor (L-11) and transferring the supernatant fluid after reaction into the Fenton reaction vessel (L-12).
5. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 1, wherein the Fenton reagent oxidation zone comprises a Fenton reaction container (L-12), a submersible pump II (P3-2) and an iron plate anode (10-2) are arranged in the Fenton reaction container (L-12), and the submersible pump II (P3-2) is connected with a three-way valve II (4-2); a direct current power supply (10-1) is arranged at the top of the Fenton reaction container (L-12), and the iron plate anode (10-2) is respectively connected with the positive electrode and the negative electrode of the adjustable direct current power supply (10-1); a third reagent pump (1-2) is arranged on the Fenton reaction container (L-12), and the Fenton reagent in the second reaction reagent tank (7) is drawn by the third reagent pump (1-2) and quantitatively added into the Fenton reaction container (L-12); the direct current power supply (10-1) applies voltage and current to the iron plate anode (10-2) to enable the iron plate anode to generate a ferrous catalyst.
6. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 5, wherein a reagent pump II (1-3) is arranged on a Fenton reaction container (L-12), the reagent pump II (1-3) is used for adding a strong alkali reagent III (8) into the Fenton reaction container (L-12) and is used for digesting ferrous ions existing in a Fenton oxidation area after reaction, and a pH meter II (5-2) is used for monitoring and indicating a neutral water outlet requirement value and promoting ferrous ions to be converted into ferric hydrolysate with small solubility product and more complete precipitation.
7. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 5, wherein a membrane filtration separator is arranged in the ultrafiltration membrane separation zone, the membrane filtration separator is connected with a coagulation reactor (L-11) and a Fenton reaction vessel (L-12) through a three-way valve II (4-2), iron mud after Fenton reaction flows back into the coagulation reactor (L-11) through a submersible pump II (P3-2) arranged at the bottom of the Fenton reaction vessel (L-12), and supernatant fluid is subjected to membrane separation filtration water quality zero turbidity aseptic treatment.
8. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 7, wherein a submerged pump II (P3-2) is arranged in the Fenton reagent oxidation zone, and the submerged pump II (P3-2) carries out membrane filtration separation on neutral supernatant adjusted after Fenton reagent reaction so as to ensure zero turbidity sterile safe water outlet.
9. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 7, wherein the membrane separation of the ultrafiltration membrane separation zone is any one of ultrafiltration UF, forward osmosis membrane FO and reverse osmosis membrane RO.
10. The coagulation-membrane separation-Fenton reagent oxidation integrated water treatment experiment regulation and control device according to claim 9, wherein the pores of the ultrafiltration membrane (UF) are cut into a molecular weight of 1000 daltons with 0.01um, bacteria and substances with molecular weight larger than 1000 daltons are trapped, and the effluent reaches zero turbidity.
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