Turbulence-enhanced advanced oxidation reaction device

Abstract

The invention discloses a turbulence-enhanced advanced oxidation reaction device, which belongs to the technical field of fluid pollutant treatment and comprises a rotational flow liquid storage device, a water pump, a rotational flow feeding main pipeline, a reaction unit and a circulating reflux pipeline, a wastewater inlet is formed in the top of the rotational flow liquid storage device, and a rotational flow feeding main pipeline is arranged at the bottom of the rotational flow liquid storage device; the reaction unit comprises a plurality of parallel hydrocyclones and at least one series hydrocyclone, and after the water pump is started, the treating fluid forms a high-turbulent kinetic energy swirling flow field in the parallel hydrocyclones and / or the series hydrocyclones so as to strengthen Fenton reaction mass transfer and oxidative degradation; and the treated fluid returns to the rotational flow liquid storage device through the circulating reflux pipeline to form a closed cycle. According to the invention, higher mass transfer rate and reaction rate under lower energy consumption can be realized, series-parallel connection can be simultaneously realized in a smaller space, engineering application is easy to realize, multi-field intensification of coupling light, piezoelectricity, ozone and the like can be realized, and application scenes are diversified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid pollutant treatment, and particularly relates to a turbulent flow enhanced advanced oxidation reaction device. BACKGROUND

[0002] Industrial wastewater and municipal sewage often contain refractory organic pollutants discharged by pharmaceutical, chemical, dyeing and petrochemical industries. These pollutants are stable in structure, highly toxic and persistent in the environment, and are difficult to remove efficiently by traditional chemical oxidation and biological treatment processes. Advanced oxidation technology (AOPs) as a deep treatment method capable of generating strong oxidizing species such as hydroxyl radicals and sulfate radicals can achieve deep oxidation and mineralization of complex organic matter at normal temperature and pressure, and thus has become an important development direction for current wastewater deep treatment. However, the existing AOPs system generally has problems such as limited reaction interface, low utilization rate of oxidants, poor mass transfer efficiency and high energy consumption. Especially in gas-liquid-solid multiphase systems, poor mass transfer, catalyst deactivation, and solid-liquid separation difficulties result in unsatisfactory overall treatment efficiency of the system.

[0003] To overcome the above problems, researchers have tried to enhance the reaction by mechanical stirring, ultrasonic, aeration and other means, but these means have problems such as complex structure, high energy consumption, difficulty in long-term stable operation and engineering scale-up application. At the same time, most of the existing devices use static water systems, and the influence of turbulent conditions in actual flowing water on reaction rate, interfacial catalytic reaction mechanism and mass transfer performance is not fully considered.

[0004] Therefore, developing a new type of reaction device that can couple high-intensity turbulent flow and advanced oxidation reaction and is easy to scale up has significant scientific and engineering value in improving treatment efficiency and reducing energy consumption. SUMMARY

[0005] The present application aims to solve the problems of mass transfer limitation, uneven reaction, high energy consumption and difficult device maintenance in the existing advanced oxidation system, and provides an advanced oxidation reaction device with reasonable structure, stable operation and turbulent flow enhancement. By introducing a cyclone enhancement structure, a high turbulent kinetic energy, strong shear and multi-scale vortex field are formed in the water body in the reaction chamber, which significantly improves the reaction rate and oxidant utilization efficiency of the gas-liquid-solid multiphase interface, thereby improving the pollutant degradation rate and system stability.

[0006] In order to achieve the above object, the application provides the following scheme: a turbulent flow reinforced advanced oxidation reaction device, comprising: a cyclone liquid reservoir for containing a water treatment medium, a wastewater inlet being arranged at the top of the cyclone liquid reservoir, and a cyclone feed main pipeline being arranged at the bottom of the cyclone liquid reservoir; a water pump, an inlet of the water pump being communicated with the bottom of the cyclone liquid reservoir through a valve; a reaction unit, comprising a plurality of parallel cyclones and at least one serial cyclone, each of the parallel cyclones being communicated with the cyclone feed main pipeline; overflow outlets of each of the parallel cyclones being converged and returned to the cyclone liquid reservoir through overflow sub-pipelines of the serial cyclone and / or the parallel cyclone; and a circulation backflow pipeline being communicated with cyclone outlets of each of the parallel cyclones and the serial cyclone and being collected to return to the cyclone liquid reservoir, forming a closed circulation; after the water pump is started, a high turbulent flow field is formed in the parallel cyclone and / or the serial cyclone, so as to reinforce Fenton reaction mass transfer and oxidative degradation.

[0007] Further, the parallel cyclone and the serial cyclone have the same structure, and each of the parallel cyclone and the serial cyclone comprises, from top to bottom, an overflow outlet, an overflow section, a cyclone inlet, a cyclone section and a cyclone outlet.

[0008] Further, the cyclone section is in a conical structure, and self-rotation force is generated through cyclone, so as to prolong the service life of a catalyst.

[0009] Further, the lower part of the cyclone liquid reservoir is in a conical structure, and is used for preventing catalyst deposition.

[0010] Further, pressure gauges are arranged on the cyclone feed main pipeline and the circulation backflow pipeline respectively, a flow meter is arranged on the cyclone feed main pipeline, and the pressure gauges and the flow meter are used for on-line monitoring of cyclone intensity and device operation state.

[0011] Further, the pressure gauges and the flow meter are any one of PI, PT, FI or FT.

[0012] Further, the water pump is any one of a peristaltic pump, a centrifugal pump, a screw pump or a vane pump.

[0013] Further, the turbulent flow reinforced advanced oxidation reaction device further comprises a sampling port arranged on the circulation backflow pipeline and used for real-time monitoring of treatment effect.

[0014] Further, the number of the reaction units is multiple, and the reaction units are arranged in series or in parallel on a wastewater channel, so as to realize staged or high-throughput treatment.

[0015] Further, the water treatment medium in the cyclone liquid reservoir is one or more of a salt solution, a Fenton material, a photocatalytic material, a piezoelectric material, a functionalized sponge and aerogel.

[0016] Compared with the prior art, the application at least has the following beneficial effects:

[0017] The device can realize higher mass transfer rate and reaction rate at lower energy consumption, can realize series and parallel connection in a small space, is easy to realize engineering application, and can be coupled with light, piezoelectricity, ozone and other fields for strengthening, and application scenarios are diversified. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings belong to the protection scope of the present application.

[0019] Fig. 1 It is a structural schematic diagram of the device for turbulent flow reinforced advanced oxidation reaction of the present application.

[0020] Fig. 2 It is a partial structural schematic diagram of a cyclone in the device of the present application.

[0021] Fig. 3 It is a partial structural schematic diagram of a light coupling cyclone in the device of the present application.

[0022] In the figure: 1, cyclone liquid reservoir; 2, parallel cyclone; 3, series cyclone; 4, valve; 5, drainage branch pipe; 6, water pump; 7, cyclone feed main pipe; 8, pressure gauge two; 9, flow meter; 10, wastewater pipe; 11, parallel cyclone inlet branch pipe; 12, parallel cyclone overflow branch pipe; 13, parallel cyclone outlet branch pipe; 14, parallel cyclone overflow main pipe; 15, series cyclone inlet pipe; 16, parallel cyclone overflow auxiliary pipe; 17, series cyclone overflow pipe; 18, series cyclone outlet pipe; 19, circulation backflow pipe; 20, drainage pipe; 21, pressure gauge three; 30, sampling port; 101, pressure gauge one; 102, wastewater inlet; 201, overflow port; 202, overflow section; 203, cyclone section; 204, cyclone outlet; 205, cyclone inlet; 206, light radiation source. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] Reference Figs. 1 to 3 As shown, Embodiment 1 of the present invention provides a turbulence-enhanced advanced oxidation reaction apparatus for enhancing the Fenton reaction through swirling technology, thereby improving the efficiency of organic pollutant degradation. The apparatus mainly includes a swirling reservoir 1, a water pump 6, and a reaction unit. The swirling reservoir 1 is mounted on a support and is used to fill water treatment media. A pressure gauge 101 and a wastewater inlet 102 are located at the top of the swirling reservoir 1, with the wastewater inlet 102 connected to a wastewater pipe 10. A swirling feed main pipe 7 is located at the bottom of the swirling reservoir 1, from which the feed enters the reaction unit via the water pump 6. A pressure gauge 8 and a flow meter 9 are installed on the swirling feed main pipe 7. The reaction unit consists of multiple swirlers connected in parallel and / or in series. The swirlers can extend the catalyst's lifespan through their rotational force.

[0027] In this embodiment, the reaction unit includes multiple parallel cyclones 2 and one series cyclone 3.

[0028] Multiple parallel hydrocyclones 2 are connected in a row. The cyclone inlet 205 of each parallel hydrocyclone 2 is connected to the parallel hydrocyclone inlet branch pipe 11. Each parallel hydrocyclone inlet branch pipe 11 is connected to the main hydrocyclone feed pipe 7. That is, the main hydrocyclone feed pipe 7 enters each parallel hydrocyclone 2 after being diverted by each parallel hydrocyclone inlet branch pipe 11. In this embodiment, the device is also provided with a drainage branch pipe 5 and a drainage pipe 20 for drainage. Specifically, the drainage port at the bottom of the hydrocyclone reservoir 1 is connected to the drainage branch pipe 5 via a valve 4, and the drainage branch pipe 5 is connected to the drainage pipe 20.

[0029] The overflow ports 201 of each parallel hydrocyclone 2 flow into the main overflow pipe 14 of the parallel hydrocyclone via the overflow branch pipe 12 of the parallel hydrocyclone, and then enter the series hydrocyclone 3 through the inlet pipe 15 of the series hydrocyclone. The overflow auxiliary pipe 16 of the parallel hydrocyclone sends part of the overflow directly back to the hydrocyclone reservoir 1. The outlet branch pipe 13 of the parallel hydrocyclone and the outlet pipe 18 of the series hydrocyclone are connected to the circulation return pipe 19. A sampling port 30 and a pressure gauge 21 are provided in the circulation return pipe 19. The circulation return pipe 19 is finally connected back to the hydrocyclone reservoir 1 to form a closed loop.

[0030] The overflow port 201 of the series hydrocyclone 3 is connected to the overflow pipe 17 of the series hydrocyclone, and flows into the hydrocyclone reservoir 1 through the overflow pipe 17. Pressure gauge 21 is connected to the overflow pipe 17 of the series hydrocyclone.

[0031] In this embodiment, the parallel hydrocyclone 2 and the series hydrocyclone 3 have the same structure, including, from top to bottom, an overflow port 201, an overflow section 202, a cyclone inlet 205, a cyclone section 203, and a cyclone outlet 204. During operation, wastewater containing pollutants, micron-sized iron powder catalyst, and persulfate are injected into the cyclone storage tank 1 through the wastewater pipe 10. After the water pump 6 is started, the wastewater forms a high-turbulence kinetic energy cyclone field in the parallel hydrocyclone 2 and the series hydrocyclone 3, which enhances the mass transfer and oxidative degradation of the Fenton reaction. The treated liquid is continuously circulated through the circulation return pipe 19 and monitored in real time through the sampling port 30. After reaching the standard, it is discharged through the drainage pipe 20, thereby completing the efficient Fenton degradation process.

[0032] In one specific embodiment, the swirling section 203 of the hydrocyclone (referring to the parallel hydrocyclone 2 and the series hydrocyclone 3) has a conical structure.

[0033] In one specific embodiment, the cyclone separators in this embodiment are all optically coupled cyclone separators, and an optical radiation source 206 is provided at the center of the cyclone separator.

[0034] In one specific embodiment, the lower part of the cyclone reservoir 1 has a conical structure, which is designed to make full use of the fluid to flush the inner wall of the cyclone reservoir 1 to prevent catalyst deposition.

[0035] In one specific embodiment, each pressure gauge and flow meter 9 is intended to observe the swirling intensity and troubleshoot device malfunctions, and each pressure gauge and flow meter 9 can be of various types such as PI, PT, FI, FT, etc.

[0036] In one specific embodiment, the pipes of this device are made of steel pipes or composite material hoses.

[0037] In one specific embodiment, the water pump 6 can be selected from peristaltic pumps, centrifugal pumps, screw pumps, vane pumps, etc., according to production capacity requirements.

[0038] The aforementioned multiple hydrocyclones are arranged in a parallel group, and at least two hydrocyclones are arranged in a series group. One parallel group and one series group together constitute a reaction unit. Further optimization involves installing multiple reaction units along the wastewater channel to achieve high-efficiency or staged wastewater treatment.

[0039] In one specific embodiment, the water treatment medium used in this embodiment is a particulate or homogeneous water treatment medium, specifically including homogeneous / heterogeneous materials such as salt solutions, Fenton materials, photocatalytic materials, piezoelectric materials, and functionalized sponges / aerogels.

[0040] It should be understood that, in practical applications, taking the process of activating persulfate to degrade wastewater with micron-sized iron powder catalyst as an example, when using it, pollutant wastewater, micron-sized iron powder catalyst and persulfate (oxidant) are put into hydrocyclone reservoir 1, water pump 6 is adjusted to appropriate parameters, and water pump 6 is turned on to provide power for the wastewater. The wastewater enters the hydrocyclone feed main pipe 7, passes through multiple parallel hydrocyclones 2 and / or series hydrocyclones 3, and finally returns to hydrocyclone reservoir 1 through circulation return pipe 19. The treated pollutant wastewater is taken out from the sampling port 30 of circulation return pipe 19.

[0041] Example 2

[0042] Embodiment 2 of this invention provides a turbulence-enhanced advanced oxidation reactor for enhancing the efficiency of heterogeneous catalytic ozone degradation of organic pollutants through cyclone technology. This embodiment uses an Al2O3-based catalyst as an example. In use, pollutant wastewater, the Al2O3-based catalyst, and ozone are placed in a cyclone reservoir 1. The water pump 6 is adjusted to appropriate parameters and turned on to provide power to the wastewater. The wastewater enters the cyclone feed main pipe 7, passes through multiple parallel cyclones 2 and / or series cyclones 3, and finally returns to the cyclone reservoir 1 through a circulation return pipe 19. The treated pollutant wastewater is taken out from the sampling port 30 of the circulation return pipe 19.

[0043] Example 3

[0044] Embodiment 3 of this invention provides a turbulence-enhanced advanced oxidation reactor for enhancing the efficiency of piezoelectric catalytic degradation of organic pollutants through cyclone technology. This embodiment takes the degradation of wastewater using a MoS2-based piezoelectric catalyst as an example. In use, the pollutant wastewater and the MoS2-based piezoelectric catalyst are placed in a cyclone reservoir 1. The water pump 6 is adjusted to appropriate parameters and turned on to provide power to the wastewater. The wastewater enters the cyclone feed main pipe 7, passes through multiple parallel optically coupled cyclones and / or series optically coupled cyclones, and finally returns to the cyclone reservoir 1 through a circulation return pipe 19. The treated pollutant wastewater is taken out from the sampling port 30 of the circulation return pipe 19.

[0045] Example 4

[0046] Embodiment 4 of this invention provides a turbulence-enhanced advanced oxidation reactor for enhancing the efficiency of photo-Fenton degradation of organic pollutants through cyclone technology. This embodiment uses a TiO2-based catalyst material to activate the persulfate degradation process of wastewater. In use, the pollutant wastewater, catalyst, and persulfate (oxidant) are placed in a cyclone reservoir 1. The water pump 6 is adjusted to appropriate parameters and turned on to provide power to the wastewater. The wastewater enters the cyclone feed main pipe 7, passes through multiple parallel or series photocoupled cyclones, and finally returns to the cyclone reservoir 1 through a circulation return pipe 19. The treated pollutant wastewater is taken out from the sampling port 30 of the circulation return pipe 19.

[0047] The turbulence-enhanced advanced oxidation reactor disclosed in the above embodiments aims to efficiently degrade recalcitrant organic pollutants in flowing water. By utilizing the shear force and turbulence effect generated by swirling oscillation, it effectively breaks down the mass transfer barrier at the gas-liquid-solid three-phase interface, increasing the mass transfer rate between the oxidant, Fenton (co-)catalyst, and pollutants, and promoting the generation of reactive oxygen species. The centrifugal force and mechanical force generated by swirling oscillation can effectively prevent catalyst particle agglomeration, improve catalyst dispersion, and delay catalyst deactivation, thereby improving Fenton degradation efficiency.

[0048] Example 4 also constructed a photocoupled cyclone separator, utilizing photo-Fenton cyclone enhancement of advanced oxidation technology. This is a highly efficient water treatment technology that, based on traditional photo-Fenton technology, enhances the reaction process by introducing a cyclone field. It should be understood that, in practical applications, it can also be applied to cyclone enhancement of piezoelectric catalysis, ozone catalysis, and other reaction processes.

[0049] Based on the above embodiments, the present invention discloses at least the following beneficial effects:

[0050] (1) This invention employs tangential inflow and swirling induction to construct a high-turbulent kinetic energy flow field. Swirling oscillation, utilizing fluid dynamics principles, significantly enhances mass transfer efficiency and reaction rate through strong shearing, turbulent diffusion, and periodic oscillation, possessing the potential for large-scale treatment of high-concentration wastewater.

[0051] (2) The device has a compact structure and small footprint, and can be flexibly arranged in a limited space; multiple swirling reaction units can be connected in series or in parallel, and the reaction time and throughput can be adjusted as needed to adapt to different scenarios.

[0052] (3) The centrifugal and mechanical forces generated by the swirling oscillation inhibit catalyst aggregation, improve dispersion and active site exposure area, delay deactivation, and thus improve Fenton degradation efficiency.

[0053] (4) The device is modularly designed and can be equipped with catalysts or oxidants according to the characteristics of pollutants. It is compatible with multiple functions such as Fenton, photo-Fenton, piezoelectric, and ozone oxidation, so as to realize continuous flow treatment of complex wastewater and pollution control of flowing water bodies.

[0054] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0055] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A turbulence-enhanced advanced oxidation reactor, characterized in that, include: A cyclone reservoir (1) is used to contain water treatment media. It has a wastewater inlet (102) at the top and a cyclone feed main pipe (7) at the bottom. The water pump (6) has its inlet connected to the bottom port of the vortex reservoir (1) via a valve (4); The reaction unit includes multiple parallel hydrocyclones (2) and at least one series hydrocyclone (3), each of the parallel hydrocyclones (2) being connected to the main hydrocyclone feed pipe (7); the overflow ports (201) of each of the parallel hydrocyclones (2) converge and return to the hydrocyclone reservoir (1) via the series hydrocyclone (3) and / or the overflow auxiliary pipe (16) of the parallel hydrocyclone. The circulation return pipe (19) connects the swirling outlet (204) of each of the parallel swirling devices (2) and the swirling outlet (204) of the series swirling devices (3), and returns to the swirling liquid reservoir (1) to form a closed loop; After the water pump (6) is started, the treatment liquid forms a high turbulent kinetic energy swirling field in the parallel hydrocyclone (2) and / or the series hydrocyclone (3) to enhance the mass transfer and oxidative degradation of the Fenton reaction.

2. The turbulence-enhanced advanced oxidation reactor according to claim 1, characterized in that, The parallel hydrocyclone (2) and the series hydrocyclone (3) have the same structure, both including an overflow port (201), an overflow section (202), a swirl inlet (205), a swirl section (203), and a swirl outlet (204) arranged from top to bottom.

3. The turbulence-enhanced advanced oxidation reactor according to claim 2, characterized in that, The swirling section (203) has a conical structure and generates rotational force through swirling.

4. The turbulence-enhanced advanced oxidation reactor according to claim 1, characterized in that, The lower part of the cyclone reservoir (1) has a conical structure to prevent catalyst deposition.

5. The turbulence-enhanced advanced oxidation reactor according to claim 1, characterized in that, Pressure gauges are provided on the main cyclone feed pipe (7) and the circulating return pipe (19), and a flow meter (9) is provided on the main cyclone feed pipe (7). The pressure gauges and the flow meter (9) are used to monitor the cyclone intensity and the operating status of the device online.

6. The turbulence-enhanced advanced oxidation reactor according to claim 5, characterized in that, The pressure gauge and flow meter (9) are of any type PI, PT, FI or FT.

7. The turbulence-enhanced advanced oxidation reactor according to claim 1, characterized in that, The water pump (6) is any one of a peristaltic pump, a centrifugal pump, a screw pump, or a vane pump.

8. The turbulence-enhanced advanced oxidation reactor according to claim 1, characterized in that, It also includes a sampling port (30), which is located on the circulating return pipe (19) for real-time monitoring of the treatment effect.

9. The turbulence-enhanced advanced oxidation reactor according to claim 1, characterized in that, The number of reaction units is multiple, and they are arranged in series or parallel on the wastewater channel to achieve staged or high-throughput treatment.

10. The turbulence-enhanced advanced oxidation reactor according to claim 1, characterized in that, The water treatment medium in the cyclone reservoir (1) is one or more of the following: salt solution, Fenton material, photocatalytic material, piezoelectric material, functionalized sponge, and aerogel.

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