CN112573675A - Photocatalysis device for increasing concentration of dissolved oxygen in water body and use method - Google Patents
Photocatalysis device for increasing concentration of dissolved oxygen in water body and use method Download PDFInfo
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- CN112573675A CN112573675A CN202011492386.4A CN202011492386A CN112573675A CN 112573675 A CN112573675 A CN 112573675A CN 202011492386 A CN202011492386 A CN 202011492386A CN 112573675 A CN112573675 A CN 112573675A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
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- 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
- C02F2209/22—O2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
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Abstract
The invention relates to a photocatalysis device for improving the concentration of dissolved oxygen in a water body and a using method thereof, and the photocatalysis device structurally comprises a reaction box body, a photocatalysis membrane, a waterproof and breathable membrane, an oxygen delivery pipe, a diffusion pipe, an oxygen delivery hole, a floating ball and an online monitoring device; wherein the reaction box is filled with reaction solution, and the photocatalytic membrane is fixed on the bottom plate of the reaction box and can be replaced. Under the condition of illumination, the photocatalytic film decomposes the reaction solution, the generated oxygen is conveyed to the diffusion tube through the oxygen conveying tube, the oxygen is conveyed to the water through the oxygen conveying holes on the diffusion tube, and the oxygen conveying holes are covered by the waterproof breathable film to prevent the water body from entering the aeration tube; when the dissolved oxygen level reaches the specified standard, the device can be moved by a wireless remote control driving device. The photocatalytic membrane is used as a device for generating oxygen, oxygen generated by decomposing water enters a water body through the diffusion tube which is dispersed and stretched at the bottom of the water, the radiation range is wide, the treatment area is large, and photocatalytic oxygen generation materials are various, more in selectivity, strong in adaptability and convenient to replace and low in maintenance cost.
Description
Technical Field
The invention relates to a photocatalytic device for improving the concentration of dissolved oxygen in a water body and a using method thereof, belonging to the field of environmental protection technology and water treatment.
Background
The industrialization and the urbanization degree develop rapidly, but the water pollution control and treatment measures are relatively lagged, a large amount of industrial wastewater, domestic sewage, domestic garbage and the like enter the natural water body, the content of organic matters in the natural water body is greatly increased, and a large amount of algae are propagated. In the process of decomposing organic matters, microorganisms consume dissolved oxygen in water, and the respiration of animals and plants in the water causes the water to lack oxygen, so that a large number of anaerobic bacteria propagate and decompose the organic matters to generate black and odor-causing substances. Meanwhile, under acidic and reducing conditions, pollutants and ammonia nitrogen are released from the bottom mud, and gases such as methane, hydrogen sulfide and the like generated in sediments carry sludge into a water phase in the rising process, so that the water body is blackened, the blackness and odor degree of the water body is further intensified, the living environment of people is seriously influenced, the function of the water body is damaged, and the human health is harmed.
The existing black and odorous water treatment methods comprise an aeration method, a flocculation precipitation method, a microbial purification method, an artificial wetland, a biological membrane and the like. Wherein the aeration method has large investment, high energy consumption, high power requirement and low efficiency; the flocculation precipitation method cannot remove pollutants in water and is easy to rebound; the microbial purification method has slow effect, and needs to create artificial conditions to strengthen the removal effect of the microorganisms on pollutants; the artificial wetland occupies a large area and is easily influenced by plant diseases and insect pests, and the treatment mechanism, the process dynamics and the like of the artificial wetland are greatly influenced by complex biological and hydraulic conditions, so that the effluent of the artificial wetland is not up to the standard and becomes a new pollution source; biofilm technology is commonly used for the purification of low concentration wastewater.
The photocatalysis technology is to use photocatalysis material and utilize light energy to decompose water into O2Commonly used photocatalytic materials are sulfides such as CdS, bismuth based photocatalysts such as BiOV4Titanium-based photocatalysts and the like. Commonly used sacrificial agents are sodium persulfate, silver nitrate, and the like. The photocatalytic oxygen production technology has the advantages of no energy consumption, no pollution and low cost, and the produced oxygen is nanoThe dissolving efficiency of oxygen in water can be improved, the dissolved oxygen concentration of the water body is rapidly improved, and the method is very suitable for treating black and odorous water bodies. However, since the photocatalyst is required to be carried out under the illumination condition, pollution treatment in black and odorous water is difficult to perform, and a single photocatalytic material cannot be directly applied to treatment of very odorous water.
Disclosure of Invention
The invention provides a photocatalytic device for improving the concentration of dissolved oxygen in a water body and a using method thereof, aiming at overcoming the defects of the existing black and odorous water body treatment technology and developing a photocatalytic oxygen production device which is combined with a photocatalytic material and is suitable for black and odorous water bodies.
The technical solution of the invention is as follows:
a photocatalysis device for improving the concentration of dissolved oxygen in water structurally comprises a reaction box body 1, a photocatalysis membrane 3 and an oxygen conveying pipe 5. Wherein, reaction box 1 is transparent ya keli material, and light catalytic membrane 3 detachably installs on 1 bottom plate of reaction box, and reaction box top intercommunication oxygen therapy pipe 5. Under the illumination condition, the photocatalytic film 3 decomposes oxygen generated by the solution in the reaction box body 1 and conveys the oxygen to the bottom of the black and odorous water body through the oxygen conveying pipe 5. The tail part of the box body 1 is detachably provided with an online monitoring device 8 which comprises a power supply module, a communication module and a dissolved oxygen concentration sensor; the power supply module comprises a photovoltaic panel and a storage battery and provides power for the communication module and the dissolved oxygen concentration sensor; the signal output end of the dissolved oxygen concentration sensor is connected with the signal input end of the communication module, the dissolved oxygen concentration of the water body is monitored in real time, and the water body state signal is transmitted to the user terminal.
Furthermore, a water injection port 4 is arranged at the top of the reaction box body 1, and an aqueous solution containing a sacrificial agent is added into the reaction box body 1 through the water injection port 4. The sacrificial agent is sodium sulfate and silver nitrate.
Furthermore, floating balls 2 are arranged on two sides of the reaction box body 1, and buoyancy is provided to ensure that the reaction box body 1 floats on the surface of the water body.
Further, the photocatalytic film 3 is one or a combination of a bismuth-based photocatalytic reaction film, a graphene oxide photocatalytic reaction film, an oxysulfide photocatalytic reaction film, a chalcogenide photocatalytic reaction film, a conjugated polymer photocatalytic reaction film, and a titanium-based photocatalytic reaction film.
Further, the lower end of the oxygen pipe 5 is communicated with a diffusion pipe 6, and the pipe wall of the diffusion pipe 6 is provided with a plurality of oxygen transfer holes 7, so that oxygen generated by photocatalysis can be rapidly and uniformly contacted with the black and odorous water body.
Furthermore, the oxygen conveying hole 7 is provided with a waterproof and breathable film to prevent the black and odorous water from flowing back into the device.
Further, the diffuser 6 may be one or more of a disk-shaped, cross-shaped, or "non" -shaped arrangement.
As a preferred scheme, the online monitoring device 8 comprises a wireless remote control module, and the structure comprises a propeller and a control motor; the signal input end of the control motor is connected with the communication module, the signal output end of the control motor is connected with the propeller, and the photocatalytic device is controlled to move on the water surface through the user terminal.
The use method of the photocatalytic device comprises the following steps:
1) assembling all parts, and installing the photocatalytic film 3 on the bottom plate of the reaction box body 1;
2) placing the reaction box body 1 assembled in the step 2) on the surface of a water body to be treated, and adding a sacrificial agent into the reaction box body 1 through a water injection port 4;
3) a worker acquires a water body state signal through a user terminal, and the user terminal sends a prompt when the concentration of the dissolved oxygen in the water body reaches a specified standard concentration; the staff transfers the photocatalytic device to a water body area with low dissolved oxygen by operating the wireless remote control module;
4) when the content of the sacrificial agent in the box body is insufficient or the photocatalytic film 3 needs to be replaced, the photocatalytic device is recovered through the wireless remote control module, and consumable replacement is carried out.
The main working principle of the invention is as follows:
the transparent device box body ensures that sunlight enters the box body on one hand, and reaction solution for decomposing the photocatalytic material to produce oxygen is filled in the box body on the other hand, and a top plate of the transparent device box body is provided with a water injection port and an oxygen conveying pipe leading to the bottom of a water body. Arrange the photocatalysis material on the device box bottom plate in, can produce a large amount of oxygen under the illumination condition, get into the water through oxygen therapy pipe, diffuser, the waterproof ventilated membrane on oxygen therapy hole surface makes the oxygen of production advance to get into the water, blocks black and odorous water body entering device simultaneously.
Wherein, the reaction mechanism of the photocatalytic oxygen generation is that under the illumination condition, when the photocatalytic material meets the excited condition, the excited transition of electrons in the valence band passes through the near generation and enters the conduction band to form the photo-generated electrons (e) due to the excitation of light-) At the same time, holes (h) are generated in the valence band due to the transfer of electrons+). One part of the photo-generated electrons and the holes are secondarily compounded, and the other part of the photo-generated electrons and the holes are transferred to the surface of the semiconductor to be subjected to oxidation-reduction reaction with water molecules. The photo-generated electrons reduce water on the surface of the semiconductor to generate H2The holes oxidize water on the semiconductor surface to form O2. The sacrificial agent is added because when an electron acceptor, such as Ag, is present in the water+Or Fe3+When the photo-generated electrons on the conduction band are first consumed by them, O2The discharge reaction can be promoted, and the oxygen production efficiency is improved.
The invention has the beneficial effects that:
1) the photocatalytic oxygen production device has the advantages of low cost, high efficiency, no energy consumption, convenient replacement and low maintenance cost, and the photocatalytic oxygen production materials have various types, multiple options and strong adaptability.
2) The oxygen generated by decomposing water by the photocatalytic film enters the water body through the diffusion tube which is dispersed and stretched at the water bottom, the radiation range is wide, the treatment area is large, and the effect of improving the dissolved oxygen concentration of the black and odorous water body is good.
3) The invention has simple structure, does not need construction, can be directly put into use and is suitable for popularization.
4) The invention is provided with the water quality on-line monitoring device and the wireless remote control driving device, can check the water quality condition in real time, and can control the purification device to reach the water body range with serious black and odorous water through the wireless remote control driving device after the dissolved oxygen level of the water body is improved, thereby greatly improving the treatment efficiency.
Drawings
FIG. 1 is a schematic top view of a photocatalytic oxygen generator. A
FIG. 2 is a schematic view of the cross-sectional structure A-A of the photocatalytic oxygen generator.
FIG. 3 is a schematic view of a cross-sectional structure B-B of the photocatalytic oxygen generator.
Fig. 4 is a schematic view of a disc-shaped diffuser pipe.
Fig. 5 is a schematic view of a cross-shaped diffuser pipe.
FIG. 6 is a schematic view of the "non" -shaped arrangement of the diffusion tubes.
In the attached figure, 1 is a reaction box body, 2 is a floating ball, 3 is a photocatalytic membrane, 4 is a water filling port, 5 is an oxygen conveying pipe, 6 is a diffusion pipe, 7 is an oxygen conveying hole, and 8 is an online monitoring device.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings.
Referring to the attached drawings 1 and 2, the photocatalysis device for improving the concentration of dissolved oxygen in water structurally comprises a reaction box body 1, a floating ball 2, a photocatalysis membrane 3, a water injection port 4, an oxygen delivery pipe 5, a diffusion pipe 6 and an oxygen delivery hole 7. The reaction box body 1 is made of transparent acrylic materials, and floating balls 2 are arranged on two sides of the reaction box body 1 to ensure that the reaction box body 1 floats on the surface of a water body; the photocatalysis membrane 3 is detachably arranged on the bottom plate of the reaction box body 1, and the top of the reaction box body 1 is communicated with the water filling port 4 and the oxygen therapy pipe 5. Under the illumination condition, the photocatalytic film 3 decomposes oxygen generated by the solution in the reaction box body 1 and conveys the oxygen to the bottom of the black and odorous water body through the oxygen conveying pipe 5.
The tail part of the box body 1 is detachably provided with an online monitoring device 8 which comprises a power supply module, a communication module, a wireless remote control module and a dissolved oxygen concentration sensor; the power supply module comprises a photovoltaic panel and a storage battery and provides power for the communication module and the dissolved oxygen concentration sensor; the signal output end of the dissolved oxygen concentration sensor is connected with the signal input end of the communication module, the dissolved oxygen concentration of the water body is monitored in real time, and the water body state signal is transmitted to the user terminal. The wireless remote control module structure comprises a propeller and a control motor; the signal input end of the control motor is connected with the communication module, the signal output end of the control motor is connected with the propeller, and the photocatalytic device is controlled to move on the water surface through the user terminal.
When the concentration of the dissolved oxygen in the current water body reaches the specified standard concentration, the user terminal sends a prompt; and the staff transfers the photocatalytic device to a water body area with low dissolved oxygen by operating the wireless remote control module.
Under the illumination condition, the decomposition water produces oxygen, through water filling port 4 to adding the aqueous solution that contains the sacrificial agent in the reaction box 1, the lower extreme of oxygen therapy pipe 5 is the diffuser 6, and the oxygen that the photocatalysis membrane 3 produced passes through oxygen therapy pipe 5 and reaches diffuser 6, carries black smelly water bottom by oxygen therapy hole 7 on the diffuser 6 again, and oxygen therapy hole is equipped with waterproof ventilated membrane, prevents that black smelly water from getting into the device.
And injecting aqueous solution containing sacrificial agent into the box body, wherein the sacrificial agent is sodium sulfate and silver nitrate. The photocatalytic film 3 includes, but is not limited to, a bismuth-based photocatalytic reaction film such as BiPO4、BiVO4(ii) a A graphene oxide photocatalytic reaction film; films for the photocatalytic reaction of oxysulfides, e.g. Sm2Ti2O5S2(ii) a Sulfide photocatalytic reaction films such as CdS, CuGaSe; conjugated polymer photocatalytic reaction films such as triazine-based polymers, polymeric carbon nitrides; titanium-based photocatalytic reaction films and other photocatalytic reaction materials capable of generating oxygen.
Referring to the attached figures 3-5, the lower end of the oxygen duct 5 is communicated with a diffusion tube 6, and the diffusion tube 6 has a disc shape, a cross shape and a non-shape; the diffusion pipe 6 is provided with an oxygen delivery hole 7, and the surface of the oxygen delivery hole 7 is covered with a waterproof breathable film to prevent black and odorous water from entering the device through the oxygen delivery hole.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A photocatalysis device for improving the concentration of dissolved oxygen in a water body is characterized by comprising a reaction box body (1), a photocatalysis membrane (3) and an oxygen delivery pipe (5); the reaction box body (1) is made of transparent acrylic materials, the photocatalytic film (3) is detachably arranged on a bottom plate of the reaction box body (1), and the top of the reaction box is communicated with the oxygen pipe (5); under the illumination condition, oxygen generated by decomposing the solution in the reaction box body (1) by the photocatalytic film (3) is conveyed to the bottom of the black and odorous water body through the oxygen conveying pipe (5); the tail part of the box body (1) is detachably provided with an online monitoring device (8) which comprises a power supply module, a communication module and a dissolved oxygen concentration sensor; the power supply module comprises a photovoltaic panel and a storage battery and provides power for the communication module and the dissolved oxygen concentration sensor; the signal output end of the dissolved oxygen concentration sensor is connected with the signal input end of the communication module, the dissolved oxygen concentration of the water body is monitored in real time, and the water body state signal is transmitted to the user terminal.
2. The photocatalysis device for improving the concentration of the dissolved oxygen in the water body according to the claim 1, which is characterized in that the top of the reaction box body (1) is provided with a water injection port (4), and the water solution containing the sacrificial agent is added into the reaction box body (1) through the water injection port (4).
3. The photocatalysis device for increasing the concentration of dissolved oxygen in water body as claimed in claim 2, wherein the sacrificial agent is sodium sulfate or silver nitrate.
4. The photocatalysis device for increasing the concentration of dissolved oxygen in water body according to claim 1, wherein floating balls (2) are arranged on two sides of the reaction box body (1) to provide buoyancy to ensure that the reaction box body (1) floats on the surface of the water body.
5. The photocatalysis device for increasing the dissolved oxygen concentration of water body according to claim 1, wherein the photocatalysis film (3) is one or more of a bismuth system photocatalysis reaction film, a graphene oxide photocatalysis reaction film, an oxysulfide photocatalysis reaction film, a chalcogenide photocatalysis reaction film, a conjugated polymer photocatalysis reaction film and a titanium-based photocatalysis reaction film.
6. The photocatalysis device for increasing the concentration of dissolved oxygen in a water body according to claim 1, wherein one end of the oxygen conveying pipe (5) is connected with the reaction box body (1), and the other end is communicated with the diffusion pipe (6); the diffusion pipe (6) extends into the bottom of the black and odorous water body; the wall of the diffusion pipe (6) is provided with a plurality of oxygen transmission holes (7) to ensure that oxygen generated by photocatalysis is rapidly and uniformly contacted with the black and odorous water body.
7. The photocatalysis device for increasing the concentration of dissolved oxygen in water body according to claim 6, wherein the oxygen transmission hole (7) is provided with a waterproof and breathable film for preventing black and odorous water from flowing back into the device.
8. The photocatalytic device for increasing the concentration of dissolved oxygen in water body as set forth in claim 6, wherein the diffuser pipes (6) are one or more of a combination of disc-shaped diffuser pipes, cross-shaped diffuser pipes or non-arranged diffuser pipes.
9. The photocatalysis device for increasing the concentration of the dissolved oxygen in the water body according to claim 1, wherein the on-line monitoring device (8) is provided with a wireless remote control module which structurally comprises a propeller and a control motor; the signal input end of the control motor is connected with the communication module, the signal output end of the control motor is connected with the propeller, and the photocatalytic device is controlled to move on the water surface through the user terminal.
10. The photocatalysis device for increasing the concentration of the dissolved oxygen in the water body according to the claims 1 to 9, which is characterized by comprising the following steps:
assembling all parts, and installing the photocatalytic film (3) on a bottom plate of a reaction box body (1);
placing the reaction box body (1) assembled in the step 2) on the surface of a water body to be treated, and adding a sacrificial agent into the reaction box body (1) through a water injection port (4);
a worker acquires a water body state signal through a user terminal, and the user terminal sends a prompt when the concentration of the dissolved oxygen in the water body reaches a specified standard concentration; the staff transfers the photocatalytic device to a water body area with low dissolved oxygen by operating the wireless remote control module;
when the content of the sacrificial agent in the box body is insufficient or the photocatalytic film (3) needs to be replaced, the photocatalytic device is recovered through the wireless remote control module, and consumable replacement is carried out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011492386.4A CN112573675A (en) | 2020-12-17 | 2020-12-17 | Photocatalysis device for increasing concentration of dissolved oxygen in water body and use method |
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| CN202011492386.4A CN112573675A (en) | 2020-12-17 | 2020-12-17 | Photocatalysis device for increasing concentration of dissolved oxygen in water body and use method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115991516A (en) * | 2023-02-14 | 2023-04-21 | 河海大学 | Photocatalysis water body purifying synchronous oxygenation device |
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| CN107961785A (en) * | 2017-12-07 | 2018-04-27 | 清华大学 | A kind of preparation method and applications of high activity bismuth chromate nano-photocatalyst |
| CN108751451A (en) * | 2018-05-28 | 2018-11-06 | 安徽工程大学 | It is a kind of for improve Dissolved Oxygen in Water content from mobile aeration device |
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2020
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060103798A (en) * | 2005-06-07 | 2006-10-04 | 김주동 | A single-molecule of the water, oxygen increase and disinfection handle device |
| CN101326126A (en) * | 2005-10-11 | 2008-12-17 | 有限会社K2R | Apparatus for production of water through photocatalytic reaction |
| CN207135031U (en) * | 2017-05-09 | 2018-03-23 | 傅文尾 | A kind of photovoltaic power generation apparatus waterborne with oxygen supply function |
| CN107961785A (en) * | 2017-12-07 | 2018-04-27 | 清华大学 | A kind of preparation method and applications of high activity bismuth chromate nano-photocatalyst |
| CN108751451A (en) * | 2018-05-28 | 2018-11-06 | 安徽工程大学 | It is a kind of for improve Dissolved Oxygen in Water content from mobile aeration device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115991516A (en) * | 2023-02-14 | 2023-04-21 | 河海大学 | Photocatalysis water body purifying synchronous oxygenation device |
| CN115991516B (en) * | 2023-02-14 | 2024-05-10 | 河海大学 | Photocatalysis water body purifying synchronous oxygenation device |
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Application publication date: 20210330 |