CN112551777A - Fenton oxidation treatment photocatalytic membrane reactor and treatment method thereof - Google Patents
Fenton oxidation treatment photocatalytic membrane reactor and treatment method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 15
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
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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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention provides a Fenton oxidation treated photocatalytic membrane reactor and a treatment method thereof, wherein the photocatalytic membrane reactor comprises a mixing device and a reaction device which are sequentially butted along the flow direction of wastewater; the reaction device comprises a barrel body which is obliquely arranged, and one end of the barrel body, which is connected to the mixing device, is higher than the other end of the barrel body; at least one flat membrane loaded with photocatalyst is obliquely arranged in the cylinder. Integrates the advantages of heterogeneous phase-light Fenton reaction and membrane separation technology, has low energy consumption, high light utilization efficiency, convenient operation and stable operation, and can be used for treating the wastewater of refractory organic matters such as dyes, medicines, personal care products, endocrine disruptors and the like.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and relates to a photocatalytic membrane reactor for Fenton oxidation treatment and a treatment method thereof.
Background
The Fenton reaction is a high-level oxidation reaction, and decomposes hydrogen peroxide through a catalyst to generate carboxyl free radicals (OH), which have enhanced property, so that the aim of degrading organic pollutants in a water body is fulfilled. In recent years, the reaction system has excellent effect on degrading organic pollutants, and has attracted extensive attention of researchers. In order to further improve the degradation efficiency, researchers introduce energy sources such as ultrasound, light, electricity, microwaves and the like into a Fenton-like system to develop the Fenton-like system. The light Fenton system can directly utilize a natural light source, reduces energy consumption, has a much higher mineralization degree on organic matters than other systems, and is one of Fenton-like systems which are most researched at present. However, the traditional homogeneous Fenton reaction has the problems of iron mud pollution and the like, and the heterogeneous Fenton reaction is developed on the basis. The oxidation process of the system is mainly carried out on the surface of a solid catalyst, and the catalyst is loaded on the surface of a specific solid substance by a certain method to carry out oxidative degradation on pollutants in the system. The heterogeneous Fenton reaction catalyst can be recycled, the reaction application range is enlarged, the cost is saved, and the catalytic effect is improved. With the continuous development of the reaction research, the laboratory research is urgently needed to be converted into practical engineering application, and besides the development of the low-cost high-activity long-acting catalyst, the reactor which is simple in design device, high in efficiency and convenient for engineering amplification is important.
Compared with the traditional chemical reaction, the heterogeneous-photo-Fenton reaction introduces a photosystem, which is actually one of the photocatalytic reactors. The photocatalytic reactor suitable for heterogeneous-photo-Fenton reaction is a supported photocatalytic reactor, and can be divided into a fixed bed and a fluidized bed according to different catalyst carriers. The fixed bed reactor has a simplified structure and is easy to operate, and the catalyst is fixed on a film, such as a flat plate, a ring, a tube and the like. The photocatalyst is loaded on the membrane surface, so that the membrane pollution phenomenon can be effectively reduced, the catalyst is not easy to lose, the hydrophilicity of the membrane surface is improved, the performance requirement on the membrane is lower than that of an independent photocatalytic membrane, the mass transfer efficiency is high, and the membrane separation technology has the advantages.
The membrane separation technology is used as a novel efficient and energy-saving separation means and is widely applied to the field of wastewater treatment. Along with the research of multi-functional complex film, membrane catalytic reactor has catalysis concurrently and separates difunctional as a novel reactor, reaches the purpose that improves the utilization ratio of raw materials, alleviates follow-up separation energy consumption. And can be divided into an electro-catalytic membrane reactor, a photocatalytic membrane reactor and the like according to the type of catalytic reaction. The membrane separation technology and the heterogeneous-photo-Fenton oxidation technology are integrated, so that the membrane separation technology and the heterogeneous-photo-Fenton oxidation technology have the advantages of the membrane separation technology and the photo-Fenton oxidation technology, realize dual functions of catalytic oxidation and separation, and are efficient reactors.
CN207659245U discloses a Fenton-photocatalytic membrane reactor wastewater treatment device, which comprises a barrel-shaped membrane reactor, wherein the membrane reactor is connected with a water inlet valve, an ultraviolet light generating device is arranged in the membrane reactor, the ultraviolet light generating device comprises an ultraviolet light lamp, a quartz sleeve is sleeved outside the ultraviolet light lamp, catalysts are uniformly distributed in the membrane reactor, and the catalysts are ferric oxide loaded titanium dioxide nanotubes/nanowires; the bottom of the membrane reactor is provided with a hydrogen peroxide dosing device; the membrane reactor is also internally provided with an ultrafiltration membrane component, and the ultrafiltration membrane component is connected with a water outlet valve through a water outlet pipeline. However, when the device continuously operates, the artificial light source has high energy consumption and low energy utilization rate, and the operation cost is increased after the device is amplified.
CN208135924U discloses a photocatalysis fenton method effluent disposal system, includes: the photocatalytic Fenton pool is provided with a water inlet of a water outlet; a ferrous ion supply device that supplies ferrous ions to the photocatalytic Fenton cell through a conduit; a hydrogen peroxide supply device that supplies hydrogen peroxide to the photocatalytic Fenton cell through a conduit; the photocatalysis generator supplies gas to the photocatalysis Fenton pool through a gas guide pipe, and the gas contains hydroxyl radicals; the bottom of the photocatalytic Fenton pool is also connected with an aerator pipe, and the part of the aerator pipe, which is positioned in the photocatalytic Fenton pool, is connected with a plurality of aeration heads.
CN106315756A discloses a photocatalysis-Fenton oxidation synergistic advanced treatment device for organic wastewater, which comprises a photocatalysis system, a Fenton oxidation system, an aeration system, a catalyst recovery system and a cooling system; the components of the photocatalytic system comprise a reaction container, a lamp source and a photocatalyst; the Fenton oxidation system comprises a Fenton reagent and a stirring device; the aeration system consists of an aeration component and a blower; the catalyst recovery system adopts an ultrafiltration membrane for separation; the cooling system mainly cools the photocatalytic reactor.
However, when the existing reactor is continuously operated, the artificial light source has high energy consumption and low energy utilization rate, and the operation cost is increased after the equipment is amplified.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a Fenton oxidation treatment photocatalytic membrane reactor and a treatment method thereof, which integrate the advantages of heterogeneous phase-light Fenton reaction and membrane separation technology, have low energy consumption, high light utilization efficiency, convenient operation and stable operation, and can be used for treating the wastewater of refractory organic matters such as dyes, medicines, personal care products, endocrine disruptors and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a photocatalytic film reactor for fenton oxidation treatment technology, which comprises a mixing device and a reaction device which are sequentially butted in the wastewater flow direction;
the reaction device comprises a barrel body which is obliquely arranged, and one end of the barrel body, which is connected to the mixing device, is higher than the other end of the barrel body; at least one flat membrane loaded with photocatalyst is obliquely arranged in the cylinder.
The flat membrane is arranged in the reaction device, which is beneficial to large-scale fluid transportation and effective utilization of natural light sources, so that the device can obtain high-efficiency processing rate while having low energy consumption, and the operation cost of the device is reduced. The reaction device integrates the advantages of heterogeneous phase-light Fenton reaction and membrane separation technology, has low energy consumption, high light utilization efficiency, convenient operation and stable operation, and can be used for treating the wastewater of refractory organic matters such as dyes, medicines, personal care products, endocrine disruptors and the like.
The number of the flat sheet membranes used in the present invention can be freely increased or decreased according to actual conditions, and therefore, the reactor can be further expanded according to actual conditions. The activity of different catalysts to light or the treatment effect of other photocatalytic reactions can be detected by adjusting the angle distance between the flat membrane and the light source, so that laboratory research and research can be carried out.
As a preferable technical scheme of the invention, the mixing device comprises a shell, and a stirring device is arranged in the shell.
Preferably, the shell is respectively connected with a wastewater inlet pipe and a hydrogen peroxide inlet pipe.
Preferably, the bottom of the shell is provided with a sludge discharge port.
Preferably, the bottom of the shell is also provided with an aeration device, and the aeration device is externally connected with an air inlet pipe.
In the invention, wastewater to be treated enters the mixing device through the wastewater inlet pipe, is stirred and mixed with hydrogen peroxide and air, and sludge flows back to the bottom of the mixing device and can be discharged through the sludge discharge port when equipment is cleaned.
As a preferable technical scheme of the invention, a diversion chamber is arranged at the butt joint of the top of the shell and the inlet of the reaction device.
Preferably, at least two longitudinal partition plates are arranged in the diversion chamber, two adjacent longitudinal partition plates are respectively fixed on the top surface and the bottom surface of the diversion chamber, and the longitudinal partition plates divide the diversion chamber into snake-shaped deflection channels.
Preferably, the outer wall of the shell where the diversion chamber is located is provided with an overflow port, the overflow port is communicated with the diversion chamber, and sludge filtered by the diversion chamber flows into the reaction device through the overflow port.
As a preferable technical scheme of the invention, at least one ultraviolet lamp device is fixed on the inner wall of the cylinder body, and the ultraviolet lamp devices and the flat membrane are alternately distributed.
Preferably, the ultraviolet lamp device and the flat membrane are parallel to each other.
In the invention, the light source of the reaction device is mainly a natural light source and is assisted by an artificial light source. When the sunlight is sufficient, the inclination angle of the reaction device is adjusted, the inclination angle of the flat membrane can be adjusted through the buckle, and the sunlight is directly or indirectly reflected to the surface of the flat membrane through the reflecting plate to excite the non-uniform phase-light Fenton reaction to occur; when the sunlight is weak, the ultraviolet lamp device is started, and the artificial light source is used for supplementing light.
As a preferable technical solution of the present invention, the ultraviolet lamp device includes a quartz tube, and at least one ultraviolet lamp tube is axially disposed in the quartz tube.
Preferably, at least three ultraviolet lamp tubes are arranged in the quartz tube, and a circle surrounded by circle centers of the cross sections of the ultraviolet lamp tubes and the circular cross section of the quartz tube are distributed in a concentric circle.
Preferably, the quartz tube has an outer diameter of 150 to 300mm, such as 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm or 300mm, but is not limited to the recited values, and other values not recited in the range of values are also applicable.
Preferably, the ultraviolet lamp tube is a straight tube ultraviolet lamp tube.
Preferably, the ultraviolet lamp tube has a diameter of 50 to 80mm, for example, 50mm, 52mm, 54mm, 56mm, 58mm, 60mm, 62mm, 64mm, 66mm, 68mm, 70mm, 72mm, 74mm, 76mm, 78mm or 80mm, but is not limited to the recited values, and other values not recited in the range of the recited values are also applicable.
Preferably, the power of the ultraviolet lamp tube is 8W.
As a preferable technical scheme of the invention, the inner side wall of the cylinder is provided with a reflecting plate, and the reflecting plate comprises a glass fiber reinforced plastic flat plate fixed on the inner side wall of the cylinder and an aluminum oxide coating attached to the surface of the glass fiber reinforced plastic flat plate.
The reflecting plate is arranged, so that the reflecting effect is further improved, and the sunlight utilization rate is increased.
The surface of the glass fiber reinforced plastic flat plate is provided with a buckle, and the ultraviolet lamp device is detachably fixed on the glass fiber reinforced plastic flat plate through the buckle.
As a preferable technical scheme, one end of the cylinder body, which is far away from the mixing device, is provided with a water outlet.
Preferably, one end of the cylinder body, which is far away from the mixing device, is provided with a sampling port.
Preferably, the outside both ends of barrel are provided with high-order regulation support and low level regulation support respectively, high-order regulation support be fixed in the barrel and be close to the one end of compounding device, low level regulation support be fixed in the other end, through adjusting the high regulation to the regulation of barrel inclination of realizing of high-order regulation support and low level regulation support respectively.
In the invention, the reaction device is supported by the high-position adjusting bracket and the low-position adjusting bracket, the orientation of the reaction device is an east-west array, and the included angle between the reaction device and the horizontal plane can be changed by respectively adjusting the heights of the high-position adjusting bracket and the low-position adjusting bracket. The natural light source is utilized to the maximum extent by regular adjustment according to the geographical position of the reaction device and seasonal changes.
Preferably, the included angle between the axis of the cylinder and the horizontal plane is adjusted within the range of 5-40 °, for example, 5 °, 10 °, 15 °, 20 °, 25 °, 30 °, 35 ° or 40 °, but not limited to the enumerated values, and other values in the numerical range are also applicable.
As a preferable technical scheme, the cylinder is externally connected with a circulating pipeline, and two ends of the circulating pipeline are respectively connected to two ends of the cylinder.
Preferably, the inlet end of the circulating pipeline is connected to one end, far away from the mixing device, of the cylinder, and the outlet end of the circulating pipeline is connected to one end, close to the mixing device, of the cylinder.
Preferably, a circulating pump is arranged on the circulating pipeline.
In the invention, the wastewater is circularly treated for a plurality of times in the reaction device through the circulating pipeline. Sampling at a sampling port, detecting the concentration by using an ultraviolet spectrophotometer, and discharging the water sample through a water outlet after the water sample reaches the corresponding discharge standard.
In a second aspect, the present invention provides a wastewater treatment method, in which the photocatalytic membrane reactor of the first aspect is used to treat wastewater, the treatment method comprising:
injecting hydrogen peroxide and wastewater to be treated into the mixing device, stirring and mixing the mixture, introducing the mixture into the reaction device, contacting the flat membrane with the wastewater to be treated mixed with the hydrogen peroxide under the illumination condition to generate a heterogeneous-light Fenton reaction, and discharging the product after the treatment reaches the standard.
As a preferred technical scheme of the invention, the wastewater to be treated after stirring and mixing is filtered by the diversion chamber and then overflows from the overflow port into the reaction device.
Preferably, the treated wastewater is sampled and detected through a sampling port, and is discharged after the detection reaches the standard; when the detection is not up to the standard, the circulating pump is started, the wastewater circulates in the reaction device through the circulating pipeline, and the heterogeneous-photo-Fenton reaction is continuously carried out until the wastewater is discharged after reaching the standard.
Preferably, the adjustment of the inclination degree of the drum to obtain sufficient sunshine hours is achieved by adjusting the heights of the high-level adjusting bracket and the low-level adjusting bracket, respectively, with reference to local dimensions.
Preferably, when the sunshine is insufficient, the ultraviolet lamp device is started to supplement the light.
But not limited to, the recited values and other values not recited within the range of values are equally applicable.
Compared with the prior art, the invention has the beneficial effects that:
the flat membrane is arranged in the reaction device, which is beneficial to large-scale fluid transportation and effective utilization of natural light sources, so that the device can obtain high-efficiency processing rate while having low energy consumption, and the operation cost of the device is reduced. The reactor integrates the advantages of heterogeneous phase-light Fenton reaction and membrane separation technology, has low energy consumption, high light utilization efficiency, convenient operation and stable operation, and can be used for treating the wastewater of refractory organic matters such as dyes, medicines, personal care products, endocrine disruptors and the like.
Drawings
Fig. 1 is a schematic structural diagram of a photocatalytic reactor according to an embodiment of the present invention.
Wherein, 1-a mixing device; 2-a flow guide chamber; 3-a stirring device; 4-wastewater inlet pipe; 5-hydrogen peroxide inlet pipe; 6-an aeration device; 7-a sludge discharge port; 8-an overflow port; 9-flat membrane; 10-an ultraviolet lamp device; 11-a circulation pump; 12-a sampling port; 13-water outlet; 14-low position adjusting bracket; 15-a reflector plate; 16-a reaction unit; 17-high position adjusting bracket.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
It should be understood by those skilled in the art that the present invention necessarily includes necessary piping, conventional valves and general pump equipment for achieving the complete process, but the above contents do not belong to the main inventive points of the present invention, and those skilled in the art can select the layout of the additional equipment based on the process flow and the equipment structure, and the present invention is not particularly limited to this.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In one embodiment, the present invention provides a Fenton oxidation treated photocatalytic film reactor, as shown in FIG. 1, comprising a mixing device 1 and a reaction device 16, which are connected in series in the wastewater flow direction.
The reaction device 16 comprises a cylinder body which is obliquely arranged, and one end of the cylinder body, which is connected to the mixing device 1, is higher than the other end of the cylinder body; at least one flat membrane 9 loaded with photocatalyst is obliquely arranged in the cylinder. The flat membrane 9 arranged in the reaction device 16 is beneficial to large-scale fluid transportation and effective utilization of natural light sources, so that the device can obtain high-efficiency treatment rate while having low energy consumption, and the running cost of equipment is reduced. The reaction device 16 integrates the advantages of heterogeneous phase-light Fenton reaction and membrane separation technology, has low energy consumption, high light utilization efficiency, convenient operation and stable operation, and can be used for treating the wastewater of refractory organic matters such as dyes, medicines, personal care products, endocrine disruptors and the like.
The number of the flat sheet membranes 9 used in the present invention can be freely increased or decreased according to actual conditions, and therefore, the reactor can be further expanded according to actual conditions. The activity of different catalysts to light or the treatment effect of other photocatalytic reactions can be detected by adjusting the angle distance between the flat membrane 9 and a light source, so that laboratory research and research can be carried out.
The mixing device 1 comprises a shell, and a stirring device 3 is arranged inside the shell. The shell is respectively connected with a wastewater inlet pipe 4 and a hydrogen peroxide inlet pipe 5. The bottom of the shell is provided with a sludge discharge port 7, wastewater to be treated enters the mixing device 1 through the wastewater inlet pipe 4 and is stirred and mixed with hydrogen peroxide and air, and sludge flows back to the bottom of the mixing device 1 and can be discharged through the sludge discharge port 7 when equipment is cleaned. The bottom of the shell is also provided with an aeration device 6, and the aeration device 6 is externally connected with an air inlet pipe. The top of the shell is provided with a diversion chamber 2 at the butt joint part with the inlet of the reaction device 16, at least two longitudinal clapboards are arranged in the diversion chamber 2, the two adjacent longitudinal clapboards are respectively fixed on the top surface and the bottom surface of the diversion chamber 2, and the longitudinal clapboards divide the interior of the diversion chamber 2 into a snakelike deflection channel. The outer wall of the shell where the diversion chamber 2 is located is provided with an overflow port 8, the overflow port 8 is communicated with the diversion chamber 2, and the sludge filtered by the diversion chamber 2 flows into the reaction device 16 through the overflow port 8.
At least one ultraviolet lamp device 10 is fixed on the inner wall of the cylinder body, and the ultraviolet lamp devices 10 and the flat membrane 9 are alternately distributed; the ultraviolet lamp device 10 and the flat membrane 9 are parallel to each other. The ultraviolet lamp device 10 comprises a quartz tube, and at least one ultraviolet lamp tube is axially arranged in the quartz tube. At least three ultraviolet lamp tubes are arranged in the quartz tube, and the circle surrounded by the circle centers of the cross sections of the ultraviolet lamp tubes and the circular cross section of the quartz tube are distributed in concentric circles. The outer diameter of the quartz tube is 150-300 mm. The ultraviolet lamp tube is a straight tube type ultraviolet lamp tube, the diameter of the ultraviolet lamp tube is 50-80 mm, and the power of the ultraviolet lamp tube is 8W.
The inner side wall of the cylinder is provided with a reflecting plate 15, and the reflecting plate 15 comprises a glass fiber reinforced plastic plate fixed on the inner side wall of the cylinder and an aluminum oxide coating attached to the surface of the glass fiber reinforced plastic plate. The surface of the glass fiber reinforced plastic flat plate is provided with a buckle, and the ultraviolet lamp device 10 is detachably fixed on the glass fiber reinforced plastic flat plate through the buckle. The reaction device 16 provided by the invention adopts a natural light source as a main light source and an artificial light source as an auxiliary light source. When the sunlight is sufficient, the inclination angle of the flat membrane 9 can be adjusted through the buckle by adjusting the inclination angle of the reaction device 16, and the sunlight is directly or indirectly reflected to the surface of the flat membrane 9 through the reflecting plate 15 to excite the non-uniform phase-photo-Fenton reaction to occur; when the sunlight is weak, the ultraviolet lamp device 10 is turned on, and an artificial light source is used for supplementing light.
One end of the cylinder body, which is far away from the mixing device 1, is provided with a water outlet 13 and a sampling port 12. The outside both ends of barrel are provided with high-order regulation support 17 and low level regulation support 14 respectively, high-order regulation support 17 be fixed in the barrel and be close to the one end of compounding device 1, low level regulation support 14 be fixed in the other end, through adjusting high-order regulation support 17 and the high regulation that realizes the barrel inclination respectively of low level regulation support 14. The included angle between the axis of the cylinder and the horizontal plane is adjusted within the range of 5-40 degrees. The reaction device 16 is supported by the high-position adjusting bracket 17 and the low-position adjusting bracket 14, the orientation is an east-west array, and the included angle between the reaction device 16 and the horizontal plane can be changed by respectively adjusting the heights of the high-position adjusting bracket 17 and the low-position adjusting bracket 14. The natural light source is utilized to the maximum extent by adjusting periodically according to the geographical position of the reaction device 16 and seasonal changes.
The cylinder is externally connected with a circulating pipeline, and two ends of the circulating pipeline are respectively connected with two ends of the cylinder. The inlet end of the circulating pipeline is connected to one end, far away from the mixing device 1, of the cylinder, the outlet end of the circulating pipeline is connected to one end, close to the mixing device 1, of the cylinder, and the circulating pipeline is provided with a circulating pump 11. The wastewater is treated in the reaction device 16 by multiple cycles through a circulation pipeline. Sampling is carried out at the sampling port 12, concentration detection is carried out by utilizing an ultraviolet spectrophotometer, and when the water sample reaches the corresponding discharge standard, the water sample is discharged through the water outlet 13.
In another embodiment, the present invention provides a wastewater treatment method, wherein the wastewater is treated by using the photocatalytic membrane reactor provided in the above embodiment, the treatment method comprises:
injecting hydrogen peroxide and wastewater to be treated into the mixing device 1, filtering the wastewater to be treated after stirring and mixing by the diversion chamber 2, and then overflowing the wastewater to be treated into the reaction device 16 through the overflow port 8; referring to the local dimension, the inclination degree of the barrel is adjusted by adjusting the heights of the high-position adjusting bracket 17 and the low-position adjusting bracket 14 respectively to obtain sufficient sunshine hours, and when the sunshine is insufficient, the ultraviolet lamp device 10 is turned on to supplement light. The flat membrane 9 is contacted with the wastewater to be treated mixed with hydrogen peroxide under the illumination condition to generate heterogeneous phase-light Fenton reaction, the treated wastewater is sampled and detected through the sampling port 12, and the wastewater is discharged after the detection reaches the standard; when the detection is not up to the standard, the circulating pump 11 is started, the wastewater circulates in the reaction device 16 through the circulating pipeline, and the heterogeneous-photo-Fenton reaction is continuously carried out until the wastewater is up to the standard and then is discharged.
Illustratively, as shown in table 1, the present invention provides a summary of barrel inclination and peak sunshine hours for each major city:
TABLE 1
| City | Horizontal inclination angle (°) | Peak sunshine hours h/day |
| Beijing | 35 | 4.21 |
| Shanghai province | 25 | 4.09 |
| Tianjin | 35 | 4.57 |
| |
8 | 2.38 |
| Shijiazhuang | 37 | 5.03 |
| Zhengzhou | 29 | 4.23 |
| Sand for growing trees | 20 | 3.18 |
| Kunming (a Chinese herbal medicine) | 25 | 4.4 |
In one embodiment, the present invention provides a Fenton oxidation treated photocatalytic film reactor, as shown in FIG. 1, comprising a mixing device 1 and a reaction device 16, which are connected in series in the wastewater flow direction.
The reaction device 16 comprises a cylinder body which is obliquely arranged, and one end of the cylinder body connected to the mixing device 1 is higher than the other end of the cylinder body; at least one flat membrane 9 loaded with photocatalyst is obliquely arranged in the cylinder.
The mixing device 1 comprises a shell, and a stirring device 3 is arranged inside the shell. The shell is respectively connected with a wastewater inlet pipe 4 and a hydrogen peroxide inlet pipe 5. The bottom of the shell is provided with a sludge discharge port 7, the bottom of the shell is also provided with an aeration device 6, and the aeration device 6 is externally connected with an air inlet pipe. The top of the shell is provided with a diversion chamber 2 at the butt joint part with the inlet of the reaction device 16, at least two longitudinal clapboards are arranged in the diversion chamber 2, the two adjacent longitudinal clapboards are respectively fixed on the top surface and the bottom surface of the diversion chamber 2, and the longitudinal clapboards divide the interior of the diversion chamber 2 into a snakelike deflection channel. The outer wall of the shell where the diversion chamber 2 is located is provided with an overflow port 8, the overflow port 8 is communicated with the diversion chamber 2, and the sludge filtered by the diversion chamber 2 flows into the reaction device 16 through the overflow port 8.
At least one ultraviolet lamp device 10 is fixed on the inner wall of the cylinder body, and the ultraviolet lamp devices 10 and the flat membrane 9 are alternately distributed; the ultraviolet lamp device 10 and the flat membrane 9 are parallel to each other. The ultraviolet lamp device 10 comprises a quartz tube, and at least one ultraviolet lamp tube is axially arranged in the quartz tube. At least three ultraviolet lamp tubes are arranged in the quartz tube, and the circle surrounded by the circle centers of the cross sections of the ultraviolet lamp tubes and the circular cross section of the quartz tube are distributed in concentric circles. The outer diameter of the quartz tube is 150-300 mm. The ultraviolet lamp tube is a straight tube type ultraviolet lamp tube, the diameter of the ultraviolet lamp tube is 50-80 mm, and the power of the ultraviolet lamp tube is 8W.
The inner side wall of the cylinder is provided with a reflecting plate 15, and the reflecting plate 15 comprises a glass fiber reinforced plastic plate fixed on the inner side wall of the cylinder and an aluminum oxide coating attached to the surface of the glass fiber reinforced plastic plate. The surface of the glass fiber reinforced plastic flat plate is provided with a buckle, and the ultraviolet lamp device 10 is detachably fixed on the glass fiber reinforced plastic flat plate through the buckle.
One end of the cylinder body, which is far away from the mixing device 1, is provided with a water outlet 13 and a sampling port 12. The outside both ends of barrel are provided with high-order regulation support 17 and low level regulation support 14 respectively, high-order regulation support 17 be fixed in the barrel and be close to the one end of compounding device 1, low level regulation support 14 be fixed in the other end, through adjusting high-order regulation support 17 and the high regulation that realizes the barrel inclination respectively of low level regulation support 14.
The cylinder is externally connected with a circulating pipeline, and two ends of the circulating pipeline are respectively connected with two ends of the cylinder. The inlet end of the circulating pipeline is connected to one end, far away from the mixing device 1, of the cylinder, the outlet end of the circulating pipeline is connected to one end, close to the mixing device 1, of the cylinder, and the circulating pipeline is provided with a circulating pump 11.
Examples
The embodiment provides a photocatalytic film reactor, which is based on a photocatalytic film reactor provided by a specific embodiment, wherein an ultraviolet lamp device 10 comprises a quartz tube with an outer diameter of 200mm, 4 ultraviolet lamp tubes are axially arranged in the quartz tube, the ultraviolet lamp tubes are 8W straight ultraviolet lamp tubes with a diameter of 60mm, and the ultraviolet lamp tubes are distributed on a circumference which takes the center of the quartz tube as a circle center and has a diameter of 120 mm.
The photocatalytic membrane reactor is arranged in Beijing area, the included angle between the axis of the cylinder and the horizontal plane is 35 degrees, the flat membrane 9 is a porous ceramic membrane loaded with ferric oxide, the simulated wastewater is wastewater containing 180 mug/L of diclofenac prepared in a laboratory, the concentration of the added hydrogen peroxide is 37ppm, and after 4.21 hours of peak sunshine, the removal rate of the diclofenac in the wastewater is 43 percent.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The photocatalysis membrane reactor for Fenton oxidation treatment is characterized by comprising a mixing device and a reaction device which are sequentially butted along the wastewater flow direction;
the reaction device comprises a barrel body which is obliquely arranged, and one end of the barrel body, which is connected to the mixing device, is higher than the other end of the barrel body; at least one flat membrane loaded with photocatalyst is obliquely arranged in the cylinder.
2. The photocatalytic film reactor of claim 1, wherein the mixing device comprises a housing, and the inside of the housing is provided with a stirring device;
preferably, the shell is respectively connected with a wastewater inlet pipe and a hydrogen peroxide inlet pipe;
preferably, the bottom of the shell is provided with a sludge discharge port;
preferably, the bottom of the shell is also provided with an aeration device, and the aeration device is externally connected with an air inlet pipe.
3. The photocatalytic film reactor as recited in claim 1 or 2, wherein a flow guiding chamber is provided at the joint of the top of the housing and the inlet of the reaction device;
preferably, at least two longitudinal partition plates are arranged in the diversion chamber, two adjacent longitudinal partition plates are respectively fixed on the top surface and the bottom surface of the diversion chamber, and the longitudinal partition plates divide the diversion chamber into snake-shaped deflection channels;
preferably, the outer wall of the shell where the diversion chamber is located is provided with an overflow port, the overflow port is communicated with the diversion chamber, and sludge filtered by the diversion chamber flows into the reaction device through the overflow port.
4. A photocatalytic membrane reactor according to any of claims 1-3 wherein at least one uv lamp unit is fixed to the inner wall of the cylinder, the uv lamp units being alternately distributed with the flat sheet membranes;
preferably, the ultraviolet lamp device and the flat membrane are parallel to each other.
5. The photocatalytic membrane reactor of claim 4 wherein the ultraviolet lamp assembly comprises a quartz tube having at least one ultraviolet lamp disposed axially therein;
preferably, at least three ultraviolet lamp tubes are arranged in the quartz tube, and a circle surrounded by circle centers of the cross sections of the ultraviolet lamp tubes and the circular cross section of the quartz tube are distributed in a concentric circle;
preferably, the outer diameter of the quartz tube is 150-300 mm;
preferably, the ultraviolet lamp tube is a straight tube ultraviolet lamp tube;
preferably, the diameter of the ultraviolet lamp tube is 50-80 mm;
preferably, the power of the ultraviolet lamp tube is 8W.
6. The photocatalytic film reactor as set forth in any one of claims 1 to 5, wherein the inside wall of the cylindrical body is provided with a reflecting plate comprising a flat glass fiber reinforced plastic plate fixed to the inside wall of the cylindrical body and an alumina coating attached to the surface of the flat glass fiber reinforced plastic plate;
the surface of the glass fiber reinforced plastic flat plate is provided with a buckle, and the ultraviolet lamp device is detachably fixed on the glass fiber reinforced plastic flat plate through the buckle.
7. The photocatalytic membrane reactor of any of claims 1-6 wherein the end of the cartridge away from the mixing device is provided with a water outlet;
preferably, a sampling port is formed in one end, far away from the mixing device, of the cylinder body;
preferably, a high-position adjusting support and a low-position adjusting support are respectively arranged at two ends of the outer side of the barrel, the high-position adjusting support is fixed at one end, close to the mixing device, of the barrel, the low-position adjusting support is fixed at the other end of the barrel, and the inclination degree of the barrel is adjusted by respectively adjusting the heights of the high-position adjusting support and the low-position adjusting support;
preferably, the included angle between the axis of the cylinder and the horizontal plane is adjusted within the range of 5-40 degrees.
8. The photocatalytic film reactor according to any one of claims 1 to 7, wherein the cylinder is externally connected with a circulation pipeline, and both ends of the circulation pipeline are respectively connected to both ends of the cylinder;
preferably, the inlet end of the circulating pipeline is connected to one end, far away from the mixing device, of the cylinder, and the outlet end of the circulating pipeline is connected to one end, close to the mixing device, of the cylinder;
preferably, a circulating pump is arranged on the circulating pipeline.
9. A method for treating wastewater, comprising treating wastewater with the photocatalytic membrane reactor according to any one of claims 1 to 8, the method comprising:
injecting hydrogen peroxide and wastewater to be treated into the mixing device, stirring and mixing the mixture, introducing the mixture into the reaction device, contacting the flat membrane with the wastewater to be treated mixed with the hydrogen peroxide under the illumination condition to generate a heterogeneous-light Fenton reaction, and discharging the product after the treatment reaches the standard.
10. The treatment method according to claim 9, wherein the wastewater to be treated after stirring and mixing is filtered by a diversion chamber and then overflows from an overflow port into the reaction device;
preferably, the treated wastewater is sampled and detected through a sampling port, and is discharged after the detection reaches the standard; when the detection is not up to the standard, the circulating pump is started, the wastewater circulates in the reaction device through the circulating pipeline, and the heterogeneous phase-photo-Fenton reaction is continuously carried out until the wastewater reaches the standard and is discharged;
preferably, the adjustment of the inclination degree of the cylinder body is realized by respectively adjusting the heights of the high-position adjusting bracket and the low-position adjusting bracket so as to obtain sufficient sunshine hours by referring to local dimensions;
preferably, when the sunshine is insufficient, the ultraviolet lamp device is started to supplement the light.
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| CN202011297778.5A CN112551777A (en) | 2020-11-18 | 2020-11-18 | Fenton oxidation treatment photocatalytic membrane reactor and treatment method thereof |
| CN202110440954.4A CN113023979B (en) | 2020-11-18 | 2021-04-23 | Fenton oxidation treatment photocatalysis membrane reactor and treatment method thereof |
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| CN102745795A (en) * | 2012-07-30 | 2012-10-24 | 天津工业大学 | Solar catalytic oxidation-membrane separation three-phase fluidized bed circulation reaction device |
| CN106315756A (en) * | 2016-10-18 | 2017-01-11 | 南昌航空大学 | Device for advanced treatment of organic wastewater through coordination of photocatalysis and fenton oxidation |
| CN207330427U (en) * | 2017-09-04 | 2018-05-08 | 永港伟方（北京）科技股份有限公司 | A kind of formaldehyde-containing wastewater efficient oxidation processing unit |
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