Array-type fluid-induced piezoelectric photocatalytic sewage purification reactor with double-layer sleeves

Abstract

The invention discloses a double-layer sleeve array type fluid-induced piezoelectric electro-catalysis sewage purification reactor, and belongs to the technical field of sewage treatment. The reactor mainly comprises a sewage chamber, a sample introduction pipe, a reaction chamber array, a reflux chamber and a reflux pipe, the core of the reaction chamber is that the reaction chamber adopts a unique double-layer sleeve structure: a hollow quartz glass sleeve coated with a piezoelectric photocatalytic membrane is coaxially arranged in a polygon prism quartz glass cover, and a polygon annular space type flow channel is formed between the hollow quartz glass sleeve and the polygon prism quartz glass cover. And the tail end of the sample injection pipe is divided into a plurality of parallel reaction chambers to form a treatment array. During working, water flow impact induces a piezoelectric effect to generate an electric field, meanwhile, an external light source excites a photocatalytic reaction, photon-generated carriers are effectively separated through the synergistic effect of the two, and the pollutant degradation efficiency is greatly improved. The backflow system forms a closed circulation loop, and fluid mechanical energy is continuously utilized. The device realizes efficient collaboration and complementation of mechanical energy, optical energy and chemical energy, has the advantages of compact structure, high energy utilization rate, large treatment flux, strong operation controllability and the like, and is particularly suitable for deep treatment of degradation-resistant organic wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and is a built-in piezoelectric photocatalytic membrane reactor that utilizes fluid mechanical energy to drive the piezoelectric effect and work synergistically with photocatalysis. Background Technology

[0002] With the continuous advancement of industrialization, wastewater containing recalcitrant organic matter has become a severe challenge to the water environment. Advanced oxidation technologies, especially photocatalytic oxidation, hold promise for efficiently mineralizing organic pollutants into CO2 and H2O, and are considered a highly promising advanced wastewater treatment solution. However, this technology faces two major bottlenecks in practical application: firstly, its energy source is highly dependent on external sunlight, resulting in high energy costs and limitations imposed by natural conditions; secondly, photogenerated electrons (e... - ) and holes (h + The high recombination rate of ) leads to low quantum efficiency and limited reaction rate.

[0003] To suppress electron-hole recombination, researchers often employ strategies such as noble metal deposition (e.g., Pt, Ag) or the construction of semiconductor heterojunctions (e.g., TiO2 / CdS). However, these methods are often accompanied by problems such as complex preparation processes, high material costs, or insufficient catalyst stability. On the other hand, to achieve energy conservation and emission reduction, the development and utilization of low-frequency, dispersed mechanical energy (e.g., water flow energy, wave energy) that is widely present but underutilized in water bodies has become a research hotspot. Piezoelectric catalysis technology can convert this type of mechanical energy into electric field energy to drive catalytic reactions, but its ability to degrade pollutants when acting alone is limited, and its energy conversion efficiency still needs to be improved.

[0004] Currently, while some cutting-edge research attempts to combine piezoelectric effects with photocatalytic performance at the materials level, most studies remain limited to the laboratory stage with powdered or sheet-like catalysts, lacking reactor structural designs for macroscopic scale-up applications. Existing research generally fails to systematically address how to achieve efficient synergy and energy complementarity between the two effects in practical operating environments from the perspectives of fluid dynamics, mass transfer processes, and light field distribution. Specifically, current technologies still struggle to simultaneously and efficiently meet the following requirements on a macroscopic scale: 1) providing stable and efficient fluid mechanical energy input for the piezoelectric effect; 2) ensuring the light intensity and uniformity required for the photocatalytic reaction; and 3) achieving spatial coupling and temporal matching of the piezoelectric and light fields at the device level. Therefore, developing a wastewater treatment device that can achieve efficient synergy between fluid mechanical energy, light energy, and chemical energy through structural design remains a key technological bottleneck that urgently needs to be overcome in this field. Summary of the Invention

[0005] The primary objective of this invention is to overcome the shortcomings of the prior art and provide a fluid-induced piezoelectric photocatalytic wastewater treatment reactor that is compact in structure, has high energy utilization, and good treatment effect.

[0006] Another objective of this invention is to convert the mechanical energy of water flow into electric field energy that drives photocatalytic reaction through a unique reactor structure design, thereby achieving efficient synergy of mechanical energy, light energy and chemical energy, fundamentally solving the problem of high recombination rate of photogenerated carriers, and reducing energy dependence on external light sources.

[0007] Another objective of this invention is to provide a modular, high-throughput reactor configuration that lays the foundation for the linear scale-up and stable operation of the system, enabling it to adapt to the treatment needs of different water qualities and quantities.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a double-layered array-type fluid-induced piezoelectric photocatalytic wastewater purification reactor, comprising a wastewater chamber, an inlet pipe, a peristaltic pump, a reaction chamber, a reflux chamber, and a reflux pipe.

[0009] The core innovation of this invention lies in the unique configuration of the reaction chamber: the reaction chamber adopts a double-layered sleeve structure, with a hollow quartz glass sleeve at its core. The outer surface of the hollow quartz glass sleeve is tightly covered with a piezoelectric photocatalytic film. The hollow quartz glass sleeve is coaxially disposed inside a quartz glass cover with good light transmittance, forming a polygonal annular flow channel between the two. This design constitutes the basic reaction unit of this invention.

[0010] The synergistic mechanism of this invention lies in the following: when wastewater flows through the channel under driving force, the continuous impact and shear stress of the fluid on the surface of the catalytic membrane induces the piezoelectric material to generate a piezoelectric polarization field; simultaneously, an internal light source is placed in the middle of a hollow quartz glass sleeve, irradiating the catalytic membrane through the quartz glass cover, exciting the photocatalytic material to generate photogenerated electron-hole pairs. The piezoelectric polarization field can effectively drive the directional migration of photogenerated charge carriers, thereby significantly suppressing their recombination and greatly improving the quantum efficiency and degradation rate of the photocatalytic reaction.

[0011] The high-throughput processing capability of this invention is achieved through the following structure: the upper part of the reaction chamber is connected to the wastewater chamber via the sample inlet pipe, and the sample inlet pipe is divided into five parallel branches at its end, each leading to one of the five parallel reaction chambers, thus forming a parallel processing reaction chamber array. The sample inlet pipe is equipped with a peristaltic pump and a flow regulating valve for precisely controlling the flow rate and velocity of the wastewater entering the reaction array.

[0012] The energy recycling of this invention is achieved through the following structure: the lower part of the reaction chamber is connected to the reflux chamber, and the reflux chamber is connected to the wastewater chamber through the reflux pipe, thereby forming a closed-loop treatment circuit. This circuit not only prolongs the contact time between pollutants and the catalytic membrane, but more importantly, the continuous fluid circulation maintained by the peristaltic pump provides a stable and controllable mechanical energy input for the piezoelectric effect, realizing the continuous recovery and utilization of mechanical energy in the water.

[0013] Preferably, the quartz glass cover is designed as an octagonal prism polyhedron structure, which can optimize the light field distribution inside the reaction chamber through refraction and scattering effects, reduce light propagation loss, and thus improve the utilization rate of visible light.

[0014] The beneficial effects of this invention are:

[0015] Innovation in Structural and Energy Synergy: This invention pioneers an integrated scheme combining a double-layered, polygonal annular flow channel reaction chamber with a piezoelectric-photocatalytic coupling mechanism. This structure not only significantly increases the effective catalytic reaction area per unit volume, ensuring sufficient contact and efficient mass transfer between the fluid and the catalytic membrane, but more importantly, it efficiently converts the mechanical energy of the water flow into the electric field energy driving the photocatalytic reaction through the piezoelectric effect. This achieves a closed-loop energy flow from mechanical energy to electrical energy to chemical energy, solving the core problem of high electron-hole recombination rates in traditional photocatalytic technologies.

[0016] Modular design and high throughput: Five parallel reaction chambers, formed by a split-flow design of the injection tubes, constitute a standardized modular processing unit. This design not only significantly increases the total processing area and throughput of the system, but also reduces the system pressure drop through parallel flow paths, ensuring the consistency of processing conditions (such as flow rate and illumination) in each reaction chamber, and providing a reliable technical path for the linear scale-up and industrial application of the system.

[0017] The experimentally verified high-efficiency treatment performance shows a qualitative leap in photogenerated carrier separation efficiency under the synergistic effect of piezoelectric and optical fields. Experimental data (see attached figures and examples) conclusively demonstrate that this synergistic effect significantly improves the degradation rate and removal rate of various recalcitrant organic pollutants (such as Rhodamine B and berberine hydrochloride) compared to single photocatalytic or piezoelectric catalytic processes. In particular, the degradation efficiency of target pollutants can be dramatically improved under illumination (e.g., in Example 1, the degradation rate increased from 93.5% to 98.7%).

[0018] Highly controllable and adaptable operation: By connecting peristaltic pumps and flow regulating valves in series in the pipeline, the hydraulic conditions of the system (such as flow velocity, flow rate, and shear force) can be precisely controlled, thereby achieving active optimization of piezoelectric output intensity and reaction mass transfer process. This allows the reactor to flexibly adjust to optimal operating conditions for wastewater of different qualities and quantities, demonstrating excellent adaptability.

[0019] System Integration and Practical Prospects: The entire system has a compact structure, and the circulation loop design simplifies the operation process, making it easy to install, maintain, and scale up modularly. By replacing different types of piezoelectric photocatalytic membranes (such as MoS2, ZnO, MoS2 / ZnO), customized and efficient treatment of specific pollutants can be achieved, showing broad application prospects in distributed wastewater treatment and the treatment of recalcitrant industrial wastewater. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a double-layered array-type fluid-induced piezoelectric photocatalytic wastewater purification reactor according to the present invention;

[0021] In the diagram: 1 Wastewater chamber; 2 Sample inlet tube; 3 Flow regulating valve; 4 Peristaltic pump; 5 Hollow quartz glass sleeve; 6 Octagonal prism quartz glass cover; 7 Reaction chamber; 8 Reflux chamber; 9 Reflux tube.

[0022] Figure 2 The graph shows the degradation rate of pollutants in deionized water under conditions of no light and aeration.

[0023] Figure 3 This is a graph showing the degradation rate of pollutants in deionized water under conditions of light and aeration.

[0024] Figure 4 This is a graph showing the degradation rate of pollutants in deionized water under light conditions.

[0025] Figure 5 This is a graph showing the degradation rate of pollutants in simulated industrial wastewater under conditions of light and aeration.

[0026] Figure 6 This is a graph showing the effect of different initial concentrations of pollutants on the degradation rate under light and aeration conditions.

[0027] The horizontal axis represents time in minutes, and the vertical axis represents C / C0. Squares, dots, equilateral triangles, and inverted triangles represent the degradation effect of piezoelectric photocatalytic membrane materials on pollutants under light irradiation when the pollutant concentration is 5 mg / L, 10 mg / L, 15 mg / L, and 20 mg / L, respectively.

[0028] Figure 7 A comparison chart showing the effects of different catalyst types on pollutant degradation rates under light and aeration conditions;

[0029] The horizontal axis represents time in minutes, and the vertical axis represents C / C0; the squares and dots represent the degradation effects of ZnO membrane and MoS2 membrane on pollutants under light conditions, respectively.

[0030] Figure 8The graph shows the degradation rate of the MoS2 / ZnO composite membrane under different pollutant concentrations under light and aeration conditions.

[0031] The horizontal axis represents time in minutes, and the vertical axis represents C / C0. Squares, dots, and equilateral triangles represent the degradation effect of MoS2 / ZnO membrane materials under light irradiation when the pollutant concentration is 5 mg / L, 10 mg / L, and 15 mg / L, respectively. Detailed Implementation

[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0033] Example: Please refer to Figure 1 This invention provides a technical solution: a double-layered array-type fluid-induced piezoelectric photocatalytic wastewater purification reactor, comprising a wastewater chamber 1, a hollow quartz glass sleeve 5, a quartz glass cover 6, a reaction chamber 7, a reflux chamber 8, and pipelines connecting the various parts. The reaction chamber 7 adopts an inner and outer double-layered sleeve structure, and the outer surface of the hollow quartz glass sleeve 5 is tightly covered with a piezoelectric photocatalytic film, which together with the quartz glass cover 6 constitutes the reaction chamber 7.

[0034] The hollow quartz glass sleeve 5 is a cylinder with a diameter of 10.0 cm, and its outer surface is tightly covered with a piezoelectric photocatalytic film with a thickness of approximately 0.5 mm. This glass cylinder is coaxially arranged with the quartz glass cover 6, which is designed as a regular octagonal prism with a side length of 20 cm for its cross-section. Together, they enclose a unique polygonal annular reaction chamber 7. The effective height of the hollow quartz glass sleeve 5, the quartz glass cover 6, and the internal catalytic film is all 0.5 m.

[0035] The upper part of the reaction chamber is connected to the wastewater chamber 1 via a sample inlet pipe 2. The sample inlet pipe 2 is divided into five parallel branches at its end, which evenly distribute the water flow to the five parallel reaction chambers 7. A peristaltic pump 4 and a flow regulating valve 3 are connected in series on the sample inlet pipe 2, which are used to pump the wastewater to be treated in the wastewater chamber 1 into the reaction chamber array at a controllable flow rate.

[0036] The lower part of the reaction chamber is connected to the reflux chamber 8, and the reflux chamber 8 is connected to the sewage chamber 1 through a reflux pipe 9, thus forming a complete closed-loop treatment circuit. The reflux pipe 9 is also equipped with a peristaltic pump and a flow regulating valve to maintain and regulate the circulation flow rate within the system.

[0037] The reaction chamber is encased in a highly transparent quartz glass cover 6 to provide the necessary illumination for the photocatalytic reaction inside. Preferably, the quartz glass cover 6 is designed as an octagonal prism polyhedron structure, which can optimize the light field distribution inside the reaction chamber 7 through refraction and scattering effects, thereby improving the utilization rate of visible light.

[0038] This parallel reaction chamber design constitutes the core processing unit of this reactor. Each reaction chamber 7 has a uniform inner diameter, and the outer surface of the hollow quartz glass sleeve 5 inside is covered with a piezoelectric photocatalytic film with a length of approximately 0.5 m. This structure not only significantly increases the total catalytic reaction area per unit volume, but also reduces the system pressure drop through parallel flow paths, ensuring balanced flow rates in each reaction chamber, thereby achieving a simultaneous increase in throughput and efficiency.

[0039] The system's workflow is as follows: Before starting the system, the wastewater to be treated is placed in wastewater chamber 1. During operation, the peristaltic pump 4 on the inlet pipe is first turned on to pump the wastewater into the reaction chamber array. As the wastewater flows through the piezoelectric photocatalytic membrane on the outer wall of the hollow quartz glass sleeve 5, the impact and pressure of the water flow induce the membrane material to generate a piezoelectric polarization field. Simultaneously, an internal light source shines through the hollow glass sleeve onto the surface of the piezoelectric photocatalytic membrane, while an external light source shines through the quartz glass cover 6 onto the membrane, exciting the generation of photogenerated electron-hole pairs. The piezoelectric field effectively drives the separation of photogenerated charge carriers, greatly improving the photocatalytic degradation efficiency. Subsequently, the pre-treated wastewater enters the reflux chamber 8 and returns to wastewater chamber 1 through the reflux pipe 9 driven by the peristaltic pump, thus starting the next treatment cycle. This cycle design not only extends the contact time between pollutants and the catalytic membrane, but the continuous water flow also provides a stable mechanical energy input for the piezoelectric effect, achieving efficient synergy between mechanical and light energy.

[0040] The piezoelectric photocatalytic film is made of a material possessing both piezoelectric properties and photocatalytic activity, such as MoS2, ZnO, or their composite MoS2 / ZnO. The film is prepared by a coating method and firmly covers the surface of the hollow quartz glass sleeve 5. In a preferred embodiment, the film has a thickness of approximately 0.5 mm, a length of approximately 0.5 m, and a width of approximately 9.5 cm. This width is slightly larger than the circumference of the hollow quartz glass sleeve with a diameter of 3.0 cm, ensuring an overlap area for adhesive sealing after wrapping.

[0041] By adjusting the flow regulating valve 3 in the pipeline, the flow rate and volume of wastewater flowing through the reaction chamber array can be precisely controlled, thereby optimizing the piezoelectric output and pollutant mass transfer process, enabling the reactor to adapt to different water quality and quantity treatment requirements, and always maintain optimal operating conditions.

[0042] The reactor features a compact structure and a simplified circulation loop design, facilitating modular scaling. By replacing different types of piezoelectric photocatalytic membranes, it can achieve customized and efficient purification of various recalcitrant organic pollutants, including Rhodamine B and berberine hydrochloride, demonstrating broad application prospects.

[0043] Example 1:

[0044] Preparation of photocatalytic material MoS2: 0.72 g of sodium molybdate dihydrate and 0.69 g of thioacetamide powder were weighed and dissolved in 1-butyl-3-methylimidazolium chloride. The solution was slowly titrated with 60 mL of 1 mol / L hydrochloric acid, stirred for 12 h, and then placed in a reaction vessel and reacted at 220 °C for 24 h. The mixture was washed with anhydrous ethanol and deionized water, dried at 60 °C, and the desired MoS2 was obtained. 50 mg of MoS2 composite material powder was added to 9.5 mL of N-methylpyrrolidone, mixed thoroughly, and then 0.5 g of PVDF particles were added. The mixture was dissolved at a constant temperature of 80 °C, and then 0.2 mL of ammonia water was added. The mixture was stirred on a stirrer for 6 h to form a dark gray solution, which was then prepared for use. The MoS2 catalytic material solution was pipetted, and the scale of the film scraper was adjusted to control the film thickness to approximately 0.5 mm. A film approximately 0.5 m long and 9.5 cm wide was then prepared.

[0045] The effect of light conditions on pollutant degradation rate was investigated: Five MoS2 membranes, each approximately 0.5 mm thick, were attached to the outer surface of hollow quartz glass sleeves of five parallel reaction chambers. A peristaltic pump was turned on, allowing 8 mg / L Rhodamine B deionized water solution to flow into the reaction chamber array. Reactions were carried out under both on and off light conditions, with one sample taken every 10 minutes, for a total of 11 samplings. The absorbance of the samples was measured using UV-Vis spectrophotometry, and the pollutant removal rate was calculated. The results are as follows: Figure 2 and Figure 3 As shown, the pollutant degradation rate under light conditions can reach 98.7%, which is significantly higher than 93.5% under no-light conditions. This strongly demonstrates the dominant role of photocatalysis and the effectiveness of the piezoelectric photocatalytic synergistic effect.

[0046] To further analyze the contributions of catalyst adsorption and catalytic degradation in the initial stage of the reaction, we separately measured the adsorption kinetics of pollutants on the MoS2 membrane under the same illumination conditions. The results are as follows: Figure 4 As shown.

[0047] Depend on Figure 4 It is evident that within the first 10 minutes of the reaction, the pollutant concentration rapidly decreases due to the adsorption effect of the MoS2 membrane; thereafter, the adsorption gradually reaches equilibrium, and the concentration change tends to level off. This adsorption process enriches pollutant molecules, creating favorable reaction conditions for the subsequent photocatalytic reaction. In contrast... Figure 3 and Figure 4It can be seen that after 10 minutes, the slope of the degradation curve under light conditions is much greater than that of the adsorption curve, the concentration continues to decrease significantly and eventually reaches complete degradation. This clearly proves that after adsorption equilibrium, photocatalysis and its synergistic effect with piezoelectricity become the dominant mechanism for pollutant removal, driving the reaction toward complete mineralization.

[0048] Example 2:

[0049] The degradation rate of pollutants under industrial wastewater conditions was investigated: Five MoS2 membranes, each approximately 0.5 mm thick, were attached to the outer surface of hollow quartz glass sleeves in five parallel reaction chambers. A peristaltic pump was turned on to allow the MoS2 membranes to react with an 8 mg / L solution of Rhodamine B industrial wastewater. A sample was taken every 10 minutes, for a total of 11 samples. The absorbance was measured using UV-Vis spectrophotometry, and the removal rate was calculated. The results are as follows: Figure 3 and Figure 5 The comparison shows that the degradation rate of Rhodamine B in the deionized water system can reach 98.7%, while the degradation rate in the simulated industrial wastewater system is 89.1%. This data comparison indicates that complex water components may have a certain inhibitory effect on the catalytic reaction, but the system still maintains a high treatment efficiency.

[0050] Example 3:

[0051] The effect of actual wastewater concentration on pollutant degradation rate was investigated: Berberine hydrochloride was used to simulate actual wastewater. Five MoS2 membranes, each approximately 0.5 mm thick, were attached to the outer surface of hollow quartz glass sleeves in five parallel reaction chambers. Under illumination, different concentrations (5 mg / L, 10 mg / L, 15 mg / L, and 20 mg / L) were varied. Actual wastewater underwent oxidation-reduction reactions through the MoS2 membranes, and samples were taken every 10 minutes for a total of 10 times. The results are as follows: Figure 6 As shown, the best degradation effect was observed when the initial concentration of pollutants was 10 mg / L.

[0052] Example 4:

[0053] Zinc oxide nanorods were prepared by hydrothermal synthesis. 0.2195 g of Zn(CH3COO)2·2H2O was immersed in 10 mL of ethanol solution as solution A, and 0.4 g of sodium hydroxide was immersed in 20 mL of ethanol solution as solution B. The precursor solutions were transferred to a 100 mL stainless steel reactor lined with polytetrafluoroethylene and reacted in an oven at 150 °C for 24 h. After the reaction, the nanorods were repeatedly centrifuged, washed three times with deionized water, washed once with ethanol, dried at 60 °C, and ground to obtain a white powder.

[0054] Add 50 mg of ZnO powder to 9.5 mL of N-methylpyrrolidone, mix well, then add 0.5 g of PVDF particles. Dissolve the PVDF particles at a constant temperature of 80 °C, then add 0.2 mL of ammonia water. Stir on a stirrer for 6 hours to form a dark gray solution. Prepare a membrane for use. Use a dropper to draw up the ZnO catalyst solution, adjust the scale of the membrane scraper to control the membrane thickness to about 0.5 mm, and scrape a membrane about 0.5 m long and 9.5 cm wide.

[0055] To investigate the effect of catalyst type on pollutant degradation rate, two sets of degradation experiments were conducted sequentially. First, five MoS2 membranes, each approximately 0.5 mm thick, were attached to the outside of the hollow quartz glass sleeves 5 of five parallel reaction chambers 7. Actual wastewater was degraded under illumination, with a sample taken every 10 minutes, for a total of 11 times. After this set of experiments was completed, five ZnO membranes of the same thickness were immediately attached to the same locations, and the experiment was repeated under identical conditions. The results are as follows: Figure 7 As shown, the MoS2 membrane has a higher efficiency in degrading pollutants than the ZnO membrane.

[0056] Example 5:

[0057] Preparation of photoelectrocatalytic material MoS2 / ZnO: 0.72 g of sodium molybdate dihydrate and 0.69 g of thioacetamide powder were weighed and dissolved in 1-butyl-3-methylimidazolium chloride. The solution was slowly titrated with 60 mL of 1 mol / L hydrochloric acid, stirred for 12 h, and then placed in a reaction vessel. The mixture was reacted at 220 °C for 24 h. After washing with anhydrous ethanol and deionized water, the solution was dried at 60 °C to obtain the desired MoS2. 10 mL of 0.1 M zinc acetate ethanol solution and 20 mL of 0.5 M sodium hydroxide ethanol solution were mixed and stirred to form a transparent suspension. 0.2 g of MoS2 was added and placed in a reaction vessel. The mixture was reacted at 150 °C for 24 h, washed several times with anhydrous ethanol, and dried at 60 °C to obtain the desired MoS2 / ZnO composite material.

[0058] Add 50 mg of MoS2 / ZnO composite powder to 9.5 mL of N-methylpyrrolidone, mix well, then add 0.5 g of PVDF particles, dissolve at a constant temperature of 80 °C, then add 0.2 mL of ammonia water, stir on a stirrer for 6 h to form a dark gray solution, scrape a film for use.

[0059] The degradation rate of pollutants was investigated based on actual wastewater concentrations: Berberine hydrochloride was used to simulate actual wastewater. MoS2 / ZnO composite membranes with a thickness of approximately 0.5 mm were tightly attached to the outside of the hollow quartz glass sleeves of five parallel reaction chambers. Degradation experiments were conducted on wastewater with initial concentrations of 5 mg / L, 10 mg / L, and 15 mg / L under illumination. Samples were taken every 10 minutes, for a total of 11 samplings. The results are as follows: Figure 8As shown, when the initial concentration of pollutants is 10 mg / L, the MoS2 / ZnO composite membrane exhibits the best degradation effect.

[0060] This invention, through the specific embodiments described above, demonstrates that the array-type fluid-induced piezoelectric photocatalytic wastewater purification reactor with double-layered sleeves successfully converts fluid mechanical energy into a driving force that enhances the photocatalytic reaction. This design not only fundamentally improves pollutant degradation efficiency through a piezoelectric-photocatalytic synergistic mechanism but also achieves efficient utilization of energy and matter through a circulating flow path and a special illumination structure, providing a novel and reliable solution for developing energy-saving and efficient distributed wastewater treatment technologies.

[0061] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A double-layered array-type fluid-induced piezoelectric photocatalytic wastewater purification reactor, characterized in that, include: Sewage chamber (1); The sample inlet tube (2) is equipped with a peristaltic pump (4) and a flow regulating valve (3); the reaction chamber (7) adopts an inner and outer double-layer sleeve structure, including: a hollow quartz glass sleeve (5), the outer surface of which is covered with a piezoelectric photocatalytic film; A quartz glass cover (6) is fitted over the hollow quartz glass cover, forming a polygonal annular flow channel between the two; a reflux chamber (8) is connected to the lower part of the reaction chamber (7); a reflux pipe (9) connects the reflux chamber (8) and the wastewater chamber (1) to form a closed loop; the end of the sample inlet pipe (2) is divided into multiple parallel branches, which lead to multiple parallel reaction chambers (7) to form a reaction chamber array.

2. The reactor according to claim 1, characterized in that, The quartz glass cover (6) has an octagonal prism polyhedral structure.

3. The reactor according to claim 1, characterized in that, The piezoelectric photocatalytic film has a thickness of 0.5 mm and a length of 0.5 m, and covers the outer surface of the hollow quartz glass sleeve (5).

4. The reactor according to claim 1, characterized in that, The hollow quartz glass sleeve (5) is a cylinder with a diameter of 10.0 cm; the quartz glass cover (6) is an octagonal prism with a cross-sectional side length of 20.0 cm.

5. The reactor according to claim 1, characterized in that, The reaction chamber array includes at least three reaction chambers (7) arranged in parallel.

6. The reactor according to claim 1, characterized in that, The material of the piezoelectric photocatalytic film is selected from at least one of MoS2, ZnO, and MoS2 / ZnO composite materials.

7. The reactor according to claim 1, characterized in that, The return pipe (9) is equipped with a peristaltic pump and a flow regulating valve.

8. The reactor according to claim 1, characterized in that, The piezoelectric photocatalytic film is prepared by a scraping method and fixed on the outer surface of the hollow quartz glass sleeve (5).

9. The reactor according to claim 1, characterized in that, The working process of the reactor is as follows: Wastewater is pumped into the reaction chamber array through the sample inlet tube (2); when it flows through the polygonal annular flow channel, the fluid impacts the piezoelectric photocatalytic membrane to generate a piezoelectric field; an external light source shines through the quartz glass cover (6) to irradiate the catalytic membrane and excite the photocatalytic reaction; the treated water is returned to the wastewater chamber (1) through the return chamber (8) and the return pipe (9) to form a cycle.

10. The reactor according to claim 1, characterized in that, The reactor is suitable for treating industrial or simulated wastewater containing substances such as Rhodamine B and berberine hydrochloride.

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