CN214299385U - Novel acousto-optic catalytic water purifier - Google Patents
Novel acousto-optic catalytic water purifier Download PDFInfo
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- CN214299385U CN214299385U CN202022904652.1U CN202022904652U CN214299385U CN 214299385 U CN214299385 U CN 214299385U CN 202022904652 U CN202022904652 U CN 202022904652U CN 214299385 U CN214299385 U CN 214299385U
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Abstract
The utility model provides a novel reputation catalysis water purification device, its characterized in that: the reaction tank is provided with an ultrasonic source, a light source, an acoustic-optic catalyst feeding port and an acoustic-optic catalyst interception and recovery channel; the reaction tank is connected with a water inlet channel, a water outlet channel and a blow-off pipe. The main body part of the device consists of an acousto-optic catalytic reactor and a secondary cross-flow filtration reaction membrane, wherein (1) the acousto-optic catalytic reactor plays a role in degrading pollutants by acousto-optic catalysis; (2) the ultrasonic transducers of the adopted ultrasonic field are divided into two groups, namely a double-frequency ultrasonic field, the purpose of adopting double frequencies is to enable sound waves to generate a superposition phenomenon, and vibration waves with larger amplitude are generated in the sound wave diffusion process, so that the increase of the number and the variety of cavitation bubbles is promoted; (3) the adopted membrane filtration material reduces concentration polarization through cross flow filtration, increases membrane operation time, and simultaneously intercepts catalyst through membrane filtration, so that the catalyst is kept in a reactor, and the loss of the catalyst is avoided.
Description
Technical Field
The utility model belongs to the technical field of water treatment, especially, relate to a novel reputation catalysis water purification device, be particularly useful for the degradation field of difficult degradation organic waste water such as printing and dyeing wastewater, medicine waste water, papermaking waste water.
Background
Currently, the photocatalytic technology is receiving more and more attention in the field of wastewater treatment due to its advantages of high oxidation activity, no toxicity, high economic benefit, and the like. However, the conventional photocatalytic oxidation technology is often limited by the type and intensity of light, and when the conventional photocatalytic oxidation technology is applied to a non-transparent water body, the penetration depth of a light source is only a few millimeters, so that the utilization rate of the light source is greatly reduced, and the defects limit the application of the photocatalytic oxidation technology in the actual water body to a certain extent. Similarly, the use of the ultrasonic technology for realizing the mineralization and decomposition of organic pollutants based on the mechanism of Reactive Oxygen Species (ROS) generated by cavitation is difficult to be widely popularized due to the shortness of the existence time of free radicals, the low ultrasonic power and intensity, the low efficiency of pollutant degradation and the like. Therefore, the single sound degradation process or the photocatalysis process is difficult to effectively treat the actual wastewater.
SUMMERY OF THE UTILITY MODEL
Considering that the single sound degradation process or the photocatalysis process is difficult to effectively treat the actual wastewater. In order to solve the problem, the utility model effectively couples the two, and adopts the combined use of ultrasound and photocatalysis to form acousto-optic catalysis technology.
It is contemplated that the process may be run in both a load and a suspension system. In the load system, the catalyst is loaded on a certain carrier, such as a film type carrier, a filling type carrier and the like, the advantages are that the problem of catalyst loss and the problem of agglomeration can be effectively solved, the light radiation depth is not influenced, but part of active sites are covered, so that the quantity, the surface area and the interlayer gaps of the catalyst are reduced, the catalytic reaction efficiency is reduced, the defects can be overcome by a suspension type system, the system utilizes nano or micron-sized catalyst particles to be dispersed in liquid to be in full contact with pollutants, the solid-liquid contact area is higher, the reaction mass transfer resistance is smaller, the reaction efficiency is high, but the solution in the liquid is subjected to the agglomeration phenomenon and is not easy to be separated from the liquid.
In order to maintain the higher activity of catalyst, again can fully recycle the catalyst, the utility model discloses couple it with membrane separation technique, its reaction system not only has higher solid-liquid area of contact, and nanometer micron order catalyst and the not degradation macromolecule in the reactor can further be by oxidation moreover to realize the continuous operation of device.
The utility model provides a novel reputation catalysis purifier and application method thereof has high efficiency and energy saving, and the operation maintenance is simple and convenient, characteristics such as economic benefits height, applicable in the effective processing of multiple difficult degradation waste water.
The device treats pollutants in water through an acousto-optic catalysis technology. The ultrasonic transducer is arranged on the outer wall of the reaction tank, so that the heating of a water body can be effectively reduced, the influence on the catalytic activity of the catalyst is avoided, and the corrosion of oxidizing substances in water can also be avoided. The first cross-flow filter and the second cross-flow filter can effectively intercept the catalyst in water and avoid the outward flow of the catalyst. The device effectively couples the acousto-optic catalysis and the membrane separation process in sewage treatment. The device can effectively treat organic wastewater, mineralize most organic pollutants, purify water quality, and has the advantages of simple structure, low energy consumption, high efficiency, simple operation, convenient maintenance and the like.
The utility model discloses specifically adopt following technical scheme:
the utility model provides a novel reputation catalysis water purification device which characterized in that: the reaction tank is provided with an ultrasonic source, a light source, an acoustic-optic catalyst feeding port and an acoustic-optic catalyst interception and recovery channel; the reaction tank is connected with a water inlet channel, a water outlet channel and a blow-off pipe.
Preferably, the acousto-optic catalyst adding port is multiplexed with a water inlet channel.
Preferably, the ultrasonic wave source is generated by an ultrasonic wave generator and an ultrasonic wave transducer which are connected; the ultrasonic transducers are arranged in a plurality of numbers and are distributed on the outer wall of the reaction tank at equal intervals.
Preferably, the ultrasonic source is a dual-frequency ultrasonic field and is generated by two groups of ultrasonic generators and ultrasonic transducers; the ultrasonic transducer generating the first frequency ultrasonic field and the ultrasonic transducer generating the second frequency ultrasonic field are orthogonally distributed on the outer wall of the reaction tank.
Preferably, the light source is generated by one or more electrodeless ultraviolet lamps in a watertight quartz protective tube; the quartz protective tube is arranged in the reaction tank.
Preferably, the acousto-optic catalyst interception and recovery channel consists of a first cross-flow filter, a second cross-flow filter and a circulating pump; the filter membranes of the first cross-flow filter and the second cross-flow filter are hollow fiber membranes or flat sheet membranes, and the material is PVDF.
Preferably, the outlet pipes of the first cross-flow filter and the second cross-flow filter are respectively provided with a first backwashing device and a second backwashing device.
Preferably, the reaction tank is connected with a sedimentation tank and is used for recovering the solid catalyst for reuse after the reaction residue is subjected to mud-water separation.
The utility model discloses and preferred scheme's characteristics lie in:
under the action of ultrasonic vibration, cavitation and micro-jet, the way of electron transition of the catalyst is increased, and the generated oxidation active substances are obviously increased;
the micro-nano photocatalyst particles can keep good dispersion performance in a solution, and the mass transfer efficiency between a solid acousto-optic catalyst and a liquid interface can be obviously improved;
fine catalyst particles are not easy to adhere to the outer wall of the quartz tube, so that the effective radiation effect of a light source is ensured, and the synergistic effect generated by the superposition can effectively improve the degradation efficiency of the wastewater;
in addition, the concentration polarization degree on the membrane surface can be effectively reduced by adopting a cross-flow filtration mode, the deposition of particles on the membrane surface is prevented, the blockage of the particles on the membrane pore size is slowed down, the permeability of the membrane can be kept for a longer stable time, and the operation period of the membrane element can be greatly prolonged.
Compared with the prior art, the utility model discloses and preferred scheme thereof has following advantage: the main body part of the utility model consists of an acousto-optic catalytic reactor and a two-stage cross flow filtration reaction membrane, (1) wherein, the acousto-optic catalytic reactor plays the role of acousto-optic catalytic degradation of pollutants, the ultrasonic effect plays more than the phonochemical effect, and the acousto-optic catalyst is added to play the acousto-optic catalytic effect; (2) the ultrasonic transducers of the adopted ultrasonic field are divided into two groups, namely a double-frequency ultrasonic field, the purpose of adopting double frequency is to enable sound waves to generate a superposition phenomenon, vibration waves with larger amplitude are generated in the sound wave diffusion process, the increase of the number and the variety of cavitation bubbles is promoted, and double-frequency ultrasonic irradiation can generate light with wider wavelength range and stronger high energy; (3) the PDVF membrane made of the adopted membrane filtration material reduces concentration polarization through cross-flow filtration, increases the membrane operation time, and simultaneously intercepts the catalyst through membrane filtration, so that the catalyst is kept in the reactor, and the loss of the catalyst is avoided.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description:
FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic top view of a reaction tank according to an embodiment of the present invention;
in the figure: 1-a water inlet tank; 2-a water inlet pump; 3-an ultrasonic generator; 4-an ultrasonic transducer; 5-a light source; 6-quartz protective tube; 7-a first cross-flow filter; 8-a circulating pump; 9-a second cross-flow filter; 10-water outlet tank; 11-a sedimentation tank; 12-a reaction tank; 13 a-a first backwash assembly; 13 b-second backwashing means.
Detailed Description
In order to make the features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail as follows:
as shown in fig. 1 and fig. 2, in order to realize the acousto-optic catalysis function, the novel acousto-optic catalysis water purification device provided by this embodiment is provided with an ultrasonic generator, an ultrasonic transducer 4 and a light source, and the catalytic degradation of organic matters is realized by using the sound field and the light source. Meanwhile, the device has a membrane separation function, is provided with a first cross flow filter 7 and a second cross flow filter 9, realizes interception of the solid acousto-optic catalyst, and returns to the reaction tank 12 again, thereby realizing continuous operation of the device. Further, the reaction tank 12 is also connected with a sedimentation tank 11, which is beneficial to settling and collecting the solid catalyst in the backwashing wastewater and is convenient for recycling the catalyst.
As shown in fig. 1 and fig. 2, the overall apparatus specifically includes a water inlet tank 1, a water inlet pump 2, an ultrasonic generator 3, an ultrasonic transducer 4, a light source 5, a quartz protective tube 7, a first cross-flow filter 7, a circulating pump 8, a second cross-flow filter 9, a water outlet tank 10, a sedimentation tank 11, a reaction tank 12, a first backwashing device 13a, a second backwashing device 13b, and the like.
Wherein the device container is cuboid-shaped at the upper part and quadrangular pyramid-shaped at the lower part, is used for discharging backwashing waste liquid and sludge, and is provided with an ultrasonic transducer 4 on the outer wall, and the ultrasonic transducer 4 is connected with an ultrasonic generator 3; the device is provided with a cylindrical quartz tube, and one or more than one lamp source 5 is arranged in the cylindrical quartz tube. The lamp source 5 adopts electrodeless ultraviolet lamps, is arranged in the quartz protective tube 7, has more than 1 lamp tube, and can adjust the number of the lamp tubes according to the acoustic catalysis requirement.
In this embodiment, the ultrasonic transducers 4 are distributed around four sides of the outer wall of the rectangular reaction tank 12, and four groups of the ultrasonic transducers are arranged at intervals, isolated from the water body, and uniformly distributed on the outer wall. The left side and the right side of the frequency of the transducer are provided with 20-40 kHz low-frequency ultrasonic transducers, and the front side and the rear side are provided with 80-100 kHz high-frequency ultrasonic transducers, so that an ultrasonic field in the reaction tank 12 is ensured to be in an active state, and the nucleation number of cavitation bubbles is increased. The single power is 50-100W.
The filter membranes of the first cross-flow filter 7 and the second cross-flow filter 9 in this embodiment are hollow fiber membranes or flat sheet membranes, the filter membranes are made of PVDF, and the pore size is 0.01 μm to 0.1 μm. The outflow pipes of the first cross-flow filter 7 and the second cross-flow filter 9 are respectively provided with a first backwashing device 13a and a second backwashing device 13b, when the permeation flux of the membrane is obviously reduced, backwashing needs to be carried out in time, and the backwashing frequency is set to be 1/9-1/12; the backwash frequency is the ratio of the backwash time to the run time of the reactor for treating wastewater.
The acousto-optic catalyst adopted in the embodiment is a nano solid acousto-optic catalyst, and a commonly used reagent is TiO2、ZnO、GO-Ag2CO3And the like. Different catalysts can be selected according to different water quality to be treated, and TiO is generally used2The concentration of the catalyst is 1 g/L-4 g/L, and the concentration of the catalyst of ZnO is 2 g/L-3 g/L; GO-Ag2CO3The concentration of the catalyst is 0.5 g/L-2 g/L. The adopted lamp source 5 is selected according to the property of the catalyst, a transparent quartz protective tube 7 is arranged outside the lamp source 5, the upper end and the lower end of the protective tube are sealed by sealing rings to avoid water inflow, and the quartz protective tube 7 is arranged in the reaction tank 12.
In the operation process of the device, firstly, the catalyst is added into the reactor through the water inlet pump 2, and then the wastewater to be treated enters from the bottom of the reactor through the water inlet pump 2 so as to ensure that the catalyst and the wastewater are uniformly mixed; corresponding ultrasonic waves and light sources are selected according to the characteristics of the wastewater, and the catalyst generates active substances with strong oxidizing property under the excitation of the ultrasonic waves and the light sources so as to realize the efficient treatment of the mixed wastewater. Meanwhile, micro jet and turbulence generated by ultrasonic cavitation avoid the agglomeration phenomenon of the catalyst, increase the usable active sites of the catalyst and improve the acoustic catalytic activity. The cross-flow filter is capable of filtering the trapped catalyst such that the catalyst flows back into the reaction tank 12 through the circulation pump 8. Under the action of an ultrasonic field, the micro-nano catalyst particles can keep better dispersibility in the solution, the adhesion effect of the catalyst particles on the wall of the reactor is greatly reduced, meanwhile, sonoluminescence generated by ultrasonic cavitation effectively improves the catalytic activity of the catalyst, increases the yield of photo-generated electrons and photo-generated holes, and can effectively improve the degradation efficiency of wastewater; in addition, the cross-flow filtration mode can effectively slow down the concentration polarization phenomenon of the membrane, prevent the deposition of particles on the surface of the membrane and slow down the blockage of the membrane pores by the particles, so that the permeability of the membrane can be kept stable for a long time, and the aim of prolonging the operation period of the membrane element is fulfilled.
The wastewater treatment process comprises the following steps: firstly, catalyst particle materials are injected into the reaction tank 12 through the water inlet pump 2, then the lamp source 5 and the ultrasonic generator 3 are started, then the valve on the water inlet pipe is opened, and the wastewater flows into the reaction tank 12 through the lifting of the water inlet pump 2. Refractory organic matters in the wastewater are degraded in a reaction tank 12 under the action of acousto-optic catalysis of a catalyst, the effluent of the reaction tank 12 is filtered by a first cross flow filter 7, a concentrated solution enters a second cross flow filter 9 through a circulating pump 8 for further filtration, the concentrated solution of the second filter flows back into the reaction tank 12, the organic matters in the wastewater can be further intercepted under the action of the cross flow filter, and the catalyst can flow back into the reaction tank 12 to avoid loss. The operation condition during the reaction can be set according to the hydraulic retention time of the wastewater corresponding to the reaction time of the selected catalyst, so as to realize the continuous operation of the wastewater.
A backwashing process: when the reduction of the permeation amount is very obvious, the filtration membrane must be cleaned and regenerated to restore the permeability of the membrane element. Firstly closing a water inlet valve and a water outlet valve, opening a drain pipe, emptying reaction residues at the bottom of the reaction tank 12, and then opening backwashing devices on the first membrane and the second membrane for backwashing; the back washing time is 10 to 15 minutes; the frequency of backwashing is set to be 1/9-1/12; the backwash frequency is the ratio of the backwash time to the run time of the reactor for treating wastewater.
The present invention is not limited to the above preferred embodiments, and any person can derive other novel acousto-optic catalytic water purifying devices in various forms according to the teaching of the present invention.
Claims (8)
1. The utility model provides a novel reputation catalysis water purification device which characterized in that: the reaction tank is provided with an ultrasonic source, a light source, an acoustic-optic catalyst feeding port and an acoustic-optic catalyst interception and recovery channel; the reaction tank is connected with a water inlet channel, a water outlet channel and a blow-off pipe.
2. The novel acousto-optic catalytic water purification device according to claim 1, characterized in that: the acousto-optic catalyst adding port is multiplexed with the water inlet channel.
3. The novel acousto-optic catalytic water purification device according to claim 1, characterized in that: the ultrasonic source is generated by an ultrasonic generator and an ultrasonic transducer which are connected; the ultrasonic transducers are arranged in a plurality of numbers and are distributed on the outer wall of the reaction tank at equal intervals.
4. The novel acousto-optic catalytic water purification device according to claim 3, characterized in that: the ultrasonic source is a double-frequency ultrasonic field and is generated by two groups of ultrasonic generators and ultrasonic transducers; the ultrasonic transducer generating the first frequency ultrasonic field and the ultrasonic transducer generating the second frequency ultrasonic field are orthogonally distributed on the outer wall of the reaction tank.
5. The novel acousto-optic catalytic water purification device according to claim 1, characterized in that: the light source is generated by one or more electrodeless ultraviolet lamps in a watertight quartz protection tube; the quartz protective tube is arranged in the reaction tank.
6. The novel acousto-optic catalytic water purification device according to claim 1, characterized in that: the acousto-optic catalyst interception and recovery channel consists of a first cross flow filter, a second cross flow filter and a circulating pump; the filter membranes of the first cross-flow filter and the second cross-flow filter are hollow fiber membranes or flat sheet membranes, and the material is PVDF.
7. The novel acousto-optic catalytic water purification device according to claim 6, characterized in that: and the outlet pipes of the first cross-flow filter and the second cross-flow filter are respectively provided with a first backwashing device and a second backwashing device.
8. The novel acousto-optic catalytic water purification device according to claim 1, characterized in that: the reaction tank is connected with a sedimentation tank and is used for recycling the solid catalyst after mud-water separation of reaction residues.
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| CN202022904652.1U CN214299385U (en) | 2020-12-07 | 2020-12-07 | Novel acousto-optic catalytic water purifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112390324A (en) * | 2020-12-07 | 2021-02-23 | 福州大学 | Novel acousto-optic catalytic water purifying device and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390324A (en) * | 2020-12-07 | 2021-02-23 | 福州大学 | Novel acousto-optic catalytic water purifying device and working method thereof |
| CN112390324B (en) * | 2020-12-07 | 2023-10-31 | 福州大学 | Novel acousto-optic catalytic water purifying device and working method thereof |
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