CN210127161U - Photocatalytic oxidation and membrane aeration technology coupling device - Google Patents
Photocatalytic oxidation and membrane aeration technology coupling device Download PDFInfo
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- CN210127161U CN210127161U CN201920328042.6U CN201920328042U CN210127161U CN 210127161 U CN210127161 U CN 210127161U CN 201920328042 U CN201920328042 U CN 201920328042U CN 210127161 U CN210127161 U CN 210127161U
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Abstract
The utility model provides a photocatalytic oxidation and membrane aeration technical coupling device, include: a distribution tank, a membrane aeration tank and a photocatalysis tank; the membrane aeration tank is provided with a water inlet, a water outlet and a membrane aeration component; a water outlet, a water outlet and a photocatalyst inner cylinder device are arranged in the photocatalyst pool; the utility model discloses a quality of water is effectively improved to graphite alkene photocatalytic oxidation and membrane aeration technical synergism, and its technology is compact, take up an area of for a short time, easy site selection, maintain convenient, the treatment effect is good, the running cost is low.
Description
Technical Field
The utility model relates to a sewage treatment technical field especially relates to a graphite alkene light catalytic oxidation and membrane aeration technical coupling device.
Background
The photocatalytic oxidation technology is an effective method for treating the wastewater difficult to degrade due to the advantages of strong oxidation capacity, small secondary pollution, simple operation and the like. The free radicals obtained by the photocatalytic reaction can decompose most organic pollutants in water, and have made great progress in the aspect of degrading pollutants in water, and the free radicals have the characteristics of safety, energy conservation, greenness and the like. However, in the photocatalytic reaction, the surface charge-hole separation and the photoelectric absorption are affected by the semiconductor, so the efficiency of removing the pollutants by photocatalysis is low. Researches show that the graphene has high electron mobility and large specific surface area, so that the photocatalytic efficiency can be greatly improved after the graphene is compounded with a semiconductor, namely, the planar pi-pi bonds of the graphene can increase the adsorption capacity of organic matters and further improve the contact efficiency of pollutants and free radicals; the range of light absorption of the semiconductor can be changed by the graphene, and after the graphene is compounded with the semiconductor, the absorption range of the graphene is reduced due to red shift, so that the light absorption efficiency is improved; the graphene is compounded with the semiconductor, so that the system has higher electron transfer rate, the separation of electron-hole pairs and the reduction of the recombination rate of the electron-hole pairs can be promoted, and meanwhile, the photocatalysis efficiency can be greatly improved by fully utilizing excited electrons on a valence band.
A Membrane Aeration Bioreactor (MABR) is a medium which takes an air-permeable porous membrane as a support medium for the growth of a biological membrane, and oxygen is supplied through bubble-free aeration of the porous membrane to maintain the life activities of microorganisms attached to the membrane wall. The MABR adopts a hydrophobic hollow fiber membrane to perform permeable bubble-free aeration, oxygen and a nutrient substrate transfer mass in a different direction, and obvious concentration gradient distribution of oxygen and the substrate exists in an attached and growing biomembrane, so that the coexistence of nitrobacteria and denitrifying bacteria is facilitated, and favorable conditions are created for synchronous nitrification and denitrification in the biomembrane. Compared with the traditional high-pressure aeration, the low-pressure aeration principle of the MABR obviously reduces the energy consumption. The technology of organically combining the photocatalytic oxidation of graphene and the membrane aeration technology to systematize the graphene has not been reported.
SUMMERY OF THE UTILITY MODEL
The utility model provides a graphite alkene photocatalytic oxidation and membrane aeration technical coupling device, include:
a distribution tank, a membrane aeration tank and a photocatalysis tank; the membrane aeration tank is provided with a water inlet pipe, a water outlet pipe and an overflow pipe, the water inlet pipe is provided with a water inlet valve and a submersible sewage pump, and the water outlet pipe is provided with a water outlet valve; a membrane aeration component is arranged at the bottom in the membrane aeration tank; be provided with distribution tank and photocatalysis pond respectively in membrane aeration tank both sides, the distribution tank links to each other by the inlet tube with membrane aeration tank, and photocatalysis pond links to each other by the outlet pipe with membrane aeration tank, wherein:
a water inlet pipe for connecting a submersible sewage pump is arranged in the distribution tank; a water inlet valve is arranged on the water inlet pipe; a first emptying pipe and an emptying valve are arranged at the bottom of the distribution pool; the photocatalytic tank is provided with a water outlet pipe and a water outlet valve, and the bottom of the photocatalytic tank is provided with an emptying pipe and an emptying valve.
The device also comprises an air compressor; the membrane aeration assembly is connected with the air compressor through an air inlet pipe, and a pressure gauge and an air inlet valve are arranged on the air inlet pipe; the air inlet pipe is positioned outside the photocatalytic tank; the membrane aeration component is arranged along the bottom of the membrane aeration tank.
And a dissolved oxygen tester is also arranged in the membrane aeration tank.
The device also comprises a PLC control system which is electrically connected with the air compressor and used for controlling the dissolved oxygen concentration of the sewage in the membrane aeration tank in the sewage treatment process of the device;
the PLC control system is electrically connected with the dissolved oxygen tester and is used for displaying the dissolved oxygen detection value of the sewage in the sewage treatment process of the device.
The distribution tank, the photocatalytic tank and the membrane aeration tank are all open tanks.
The membrane aeration component accounts for 20-40% of the volume of the membrane aeration tank.
In some embodiments of the present invention, the aeration membrane module is a composite polymer material ultra-thin compact hollow fiber membrane, the outer diameter of the hollow fiber membrane is 200-300 μm, the thickness of the membrane wall is 30-40 μm, the surface of the membrane is compact and non-porous, the tensile strength is 50-60 MPa, and the packing density is 100-140 m2/m3。
The water inlet and the water outlet are both positioned on the side wall of the membrane aeration tank, and the water inlet is positioned 15-25cm above the bottom of the membrane aeration tank; the water outlet is positioned 30-40cm above the screen; the membrane aeration component is positioned 10-15cm above the bottom of the membrane aeration tank.
The photocatalysis pool is provided with a photocatalyst inner cylinder device which is fixed at the bottom of the photobioreactor through glass cement adhesion or flange.
The photocatalyst inner cylinder device consists of a transparent tube with a closed bottom and an open top and a built-in light source, wherein the light source comprises an ultraviolet lamp, and the inner cylinder device is made of quartz or a quartz cold trap.
The light source is fixed on the side wall of the transparent tube through glass cement and is connected to an external light intensity controller through a power line, and the outer wall of the transparent tube is provided with a transparent hydrophobic photocatalyst coating.
The transparent hydrophobic photocatalyst coating is a graphene nano titanium dioxide composite material.
The utility model provides a graphite alkene photocatalytic oxidation and membrane aeration technical coupling device effectively improves quality of water through the synergism, and its technology is compact, take up an area of for a short time, easy site selection, maintain convenient, the treatment effect is good, the running cost is low. Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a coupling device for graphene photocatalytic oxidation and membrane aeration technologies provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a graphene photocatalytic oxidation and membrane aeration technical coupling device, which comprises:
a distribution tank 3, a membrane aeration tank 6 and a photocatalytic tank 11; the membrane aeration tank 6 is provided with a second water inlet pipe 19, a first water outlet pipe 8 and an overflow pipe 9, the second water inlet pipe 19 is provided with a second water inlet valve 18 and a submersible sewage pump 15, and the first water outlet pipe 8 is provided with a first water outlet valve 10; the bottom in the membrane aeration tank 6 is provided with a membrane aeration component 4.
Be provided with distribution tank 3 and photocatalysis pond 11 respectively in 6 both sides of membrane aeration tank, distribution tank 3 links to each other by second inlet tube 19 with membrane aeration tank 6, and photocatalysis pond 11 links to each other by first outlet pipe 8 with membrane aeration tank 6, wherein:
a first water inlet pipe 2 is arranged in the distribution tank 3; a first water inlet valve 1 is arranged on the first water inlet pipe 2; a first emptying pipe 16 and a first emptying valve 17 are arranged at the bottom of the distribution tank 3;
the photocatalytic tank 11 is provided with a second water outlet pipe 12 and a second water outlet valve 13, and the bottom of the photocatalytic tank 11 is provided with a second vent pipe 25 and a second vent valve 24.
In the specific sewage treatment process, sewage to be treated is firstly input into the distribution tank 3, and the sewage in the distribution tank 3 is pumped into the membrane aeration tank 6 by the submersible sewage pump 15; the ammonia nitrogen concentration of the sewage in the distribution tank 3 is gradually increased from 20mg/L to 60 mg/L; the flora attached to the suspended filler 4 is acclimated by pumping the sewage with gradually increased ammonia nitrogen concentration into the membrane aeration tank 6. When the graphene photocatalytic oxidation and membrane aeration technology coupling device provided by the utility model is used for sewage treatment, the hydraulic retention time of sewage in the membrane aeration tank 6 is 5-24 hours.
In a preferred embodiment of the coupling device for graphene photocatalytic oxidation and membrane aeration technologies, the water inlet pipe and the water outlet pipe are both positioned on the side wall of the membrane aeration tank 6, and the water inlet pipe is positioned 15-25cm above the bottom of the membrane aeration tank 6; the bottom of the membrane aeration component 4 is positioned 10-15cm above the bottom of the membrane aeration tank.
In some embodiments of the present invention, the device further comprises an air compressor 28; the membrane aeration component 4 is connected with the air compressor 28 through an air inlet pipe 5, and the air inlet pipe 5 is provided with a pressure gauge 27 and an air inlet valve 26. In the specific implementation process, the air compressor 28 is positioned outside the membrane aeration tank 6, and the air inlet pipe 5 comprises a part of pipeline positioned inside the membrane aeration tank 6 and a part of pipeline positioned outside the membrane aeration tank 6; the pressure gauge 27 and the air inlet valve 26 are arranged on part of the pipeline. In the implementation process, part of the pipeline inside the membrane aeration tank 6 can be fixed on the side wall inside the membrane aeration tank 6, preferably, 5-10cm above the bottom.
In some embodiments of the present invention, the aeration membrane module 4 is a composite polymer material ultra-thin compact hollow fiber membrane, the outer diameter of the hollow fiber membrane is 200-300 μm, the thickness of the membrane wall is 30-40 μm, the surface of the membrane is compact and non-porous, the tensile strength is 60MPa, the elongation at break is 458%, and the packing density is 100-140 m2/m3。
In some embodiments of the present invention, a dissolved oxygen meter 20 is further installed in the membrane aeration tank.
In some embodiments of the present invention, the apparatus further comprises a PLC control system 14, wherein the PLC control system 14 may be electrically connected to an air compressor 28 for controlling the dissolved oxygen concentration of the sewage in the membrane aeration tank 6 during the sewage treatment process of the apparatus; specifically, the air compressor 28 controls the dissolved oxygen concentration of the sewage in the membrane aeration tank 6 to 0.5mg/L by the PLC control system 14 in combination with the dissolved oxygen meter 20.
The PLC control system 14 may be electrically connected to the dissolved oxygen meter 20, and is configured to display a detected value of dissolved oxygen in the sewage during the sewage treatment process of the apparatus.
It should be noted that the present invention adopts the PLC control system 14 and the specific electrical connection mode with the related device as the prior art, and those skilled in the art can determine the relevant description according to the present invention by adopting the suitable PLC control system and the electrical connection mode, and the present invention is not limited herein.
In some embodiments of the present invention, the membrane aeration tank 6 may be an open basin, such as a rectangular tank without a top surface. Of course, it is possible that a person skilled in the art may also use sinks of other shapes, such as circular, etc.
In some embodiments of the present invention, the membrane aeration assembly occupies 20% to 40% of the volume of the membrane aeration tank.
The photocatalysis pool 11 is provided with a photocatalyst inner cylinder device 22, the photocatalyst inner cylinder device 22 is fixed at the bottom of the photocatalysis pool through glass cement adhesion or flange, and the inner cylinder device 22 is made of quartz or quartz cold trap.
The photocatalyst inner cylinder device 22 consists of a transparent tube with a closed bottom and an open top and a built-in ultraviolet light source 23, wherein the ultraviolet light source 23 comprises an ultraviolet lamp.
The ultraviolet light source 23 is fixed on the side wall of the transparent tube through glass cement and is connected to the external light intensity controller 7 through a power line, and the outer wall of the transparent tube is provided with a transparent hydrophobic photocatalyst coating 21.
The transparent hydrophobic photocatalyst coating 21 is a graphene nano titanium dioxide composite material.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A photocatalytic oxidation and membrane aeration technology coupling device is characterized by comprising:
a distribution tank, a membrane aeration tank and a photocatalysis tank; the membrane aeration tank is provided with a water inlet pipe, a water outlet pipe and an overflow pipe, the water inlet pipe is provided with a water inlet valve and a submersible sewage pump, and the water outlet pipe is provided with a water outlet valve; a membrane aeration component is arranged at the bottom in the membrane aeration tank; a water distribution tank and a photocatalytic tank are respectively arranged at two sides of the membrane aeration tank, the water distribution tank is connected with the membrane aeration tank through a water inlet pipe, the photocatalytic tank is connected with the membrane aeration tank through a water outlet pipe,
a water inlet pipe for connecting a submersible sewage pump is arranged in the distribution tank; a water inlet valve is arranged on the water inlet pipe; a first emptying pipe and an emptying valve are arranged at the bottom of the distribution pool; the photocatalytic tank is provided with a water outlet pipe and a water outlet valve, and the bottom of the photocatalytic tank is provided with an emptying pipe and an emptying valve.
2. The apparatus of claim 1, further comprising an air compressor; the membrane aeration component is connected with the air compressor through an air inlet pipe, and a pressure gauge and an air inlet valve are arranged on the air inlet pipe; the air inlet pipe is positioned outside the photocatalytic tank; the membrane aeration component is arranged along the bottom of the membrane aeration tank, and a dissolved oxygen tester is also arranged in the membrane aeration tank.
3. The apparatus of claim 1, further comprising a PLC control system electrically connected to the air compressor; and the PLC control system is electrically connected with the dissolved oxygen tester.
4. The apparatus of claim 1, wherein the distribution tank, the photocatalytic tank and the membrane aeration tank are open tanks.
5. The apparatus of claim 1, wherein said membrane aeration assembly comprises 20% to 40% of the volume of said membrane aeration basin.
6. The apparatus of claim 1, wherein the water inlet and the water outlet are located on the side wall of the membrane aeration tank, and the water inlet is located 15-25cm above the bottom of the membrane aeration tank; the water outlet is positioned at the position which is 10cm above and below the top of the membrane aeration tank; the lowest end of the membrane aeration component is positioned 10-15cm above the bottom of the membrane aeration tank.
7. The apparatus of claim 1, wherein: the photocatalysis pool is provided with a photocatalyst inner cylinder device, the photocatalyst inner cylinder device is fixed at the bottom of the photocatalysis pool through glass cement adhesion or flange, and the inner cylinder device is made of quartz or quartz cold trap.
8. The apparatus of claim 7, wherein: the photocatalyst inner cylinder device consists of a transparent tube with a closed bottom and an open top and a built-in light source.
9. The apparatus of claim 8, wherein: the light source is fixed on the side wall of the transparent tube through glass cement and is connected to an external light intensity controller through a power line, and the outer wall of the transparent tube is provided with a transparent hydrophobic photocatalyst coating.
10. The apparatus of claim 9, wherein: the transparent hydrophobic photocatalyst coating is a graphene nano titanium dioxide composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920328042.6U CN210127161U (en) | 2019-03-15 | 2019-03-15 | Photocatalytic oxidation and membrane aeration technology coupling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920328042.6U CN210127161U (en) | 2019-03-15 | 2019-03-15 | Photocatalytic oxidation and membrane aeration technology coupling device |
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| CN210127161U true CN210127161U (en) | 2020-03-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956459A (en) * | 2022-05-30 | 2022-08-30 | 北京建筑大学 | Low-energy-consumption and low-emission biological-ecological treatment system and method for dispersed sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956459A (en) * | 2022-05-30 | 2022-08-30 | 北京建筑大学 | Low-energy-consumption and low-emission biological-ecological treatment system and method for dispersed sewage |
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