A compact ultraviolet reactor employing longitudinal vortex generators

Abstract

The application discloses a compact ultraviolet reactor with longitudinal vortex generators. The longitudinal vortex generators comprise a bottom plate and a plurality of longitudinal vortex generating plates; the bottom plate is in a circular ring structure or a spiral structure, and the longitudinal vortex generating plates are in a pentahedron, hexahedron or polyhedral plate structure; the longitudinal vortex generating plates are uniformly arranged along the circumference of the bottom plate, and the longitudinal vortex generating plates are arranged obliquely relative to the radial plane of the bottom plate; the compact ultraviolet reactor comprises coaxially arranged ultraviolet radiation light sources, a light-transmitting quartz tube, longitudinal vortex generators and a reactor cavity; and an annular flow channel between the reactor cavity and the light-transmitting quartz tube forms a reaction zone. The longitudinal vortex generators can strengthen the mass transfer capacity of the fluid medium in the reactor, can improve the time for the fluid medium to accept ultraviolet irradiation, thereby improving the processing efficiency, and have small flow channel space occupation and small pressure difference resistance, and are suitable for various compact ultraviolet reactors.

Description

Technical Field

[0001] This invention relates to ultraviolet light treatment of fluids, and more specifically to a compact ultraviolet reactor employing a longitudinal vortex generator. Background Technology

[0002] Ultraviolet (UV) radiation is widely used in water treatment, such as municipal drinking water production, industrial ultrapure water systems, and secondary purification of semiconductor plant water. Disinfection using UV radiation relies on inactivating microorganisms by altering their DNA, preventing them from multiplying. Simultaneously, advanced UV-based oxidation technologies utilize UV ​​radiation with chemicals (such as hydrogen peroxide, ozone, and persulfate) or vacuum ultraviolet (VUV) to generate highly oxidizing hydroxyl radicals, thereby degrading / mineralizing organic pollutants in water.

[0003] The efficiency of an ultraviolet reactor is mainly determined by the intensity of the ultraviolet radiation field and the fluid dynamics of the treated medium.

[0004] In space-constrained applications, such as secondary purification of semiconductor immersion liquids, it is difficult to employ multiple radiation sources to create a uniform radiation field. To address this issue, U.S. Patent No. 2021 / 0244833 A1 provides a device that uses a highly reflective material and a processing chamber that is at least 80% enclosed in a liquid or gas processing apparatus. Combined with a UV transparent tube and a UV lamp, this device can provide a more uniform light distribution and a higher treatment dose for reducing or eliminating biological contaminants, as well as removing, eliminating, or activating chemicals. Furthermore, U.S. Patent No. 2015 / 0246148 A1 provides a compact system including at least one optical system and a reactor with a hollow body shape, including sides, connecting portions, and an inner cavity that can open to the front and rear sides, through which a medium flows or exists. The reactor is designed with radiation reflectors in first and second functional regions, thereby ensuring a very uniform radiation density throughout the reactor's inner cavity.

[0005] For optimizing the internal fluid dynamics of UV reactors, existing technologies mainly enhance the turbulence intensity within the flow channel by adding baffles, such as the UV reactor proposed in British Patent GB 2548379A. However, this technology requires a large flow channel space and is mostly used in large-volume multi-lamp systems. The baffles occupy a large flow channel space, making it unsuitable for compact UV reactors with limited space.

[0006] Longitudinal vortex generators are widely used in heat transfer enhancement applications, their main function being to create a localized longitudinal swirling flow structure within the fluid region. This longitudinal swirling flow structure has a long flow path, enabling thorough mixing of the fluid within the tube. Therefore, designing a longitudinal vortex generator suitable for compact ultraviolet reactors can enhance the mixing of substances within the reactor, allowing the reactants to receive maximum effective radiation and improving reactor efficiency. Summary of the Invention

[0007] To address the aforementioned problems, this invention discloses a compact ultraviolet (UV) reactor employing a longitudinal vortex generator. The longitudinal vortex generator provided by this invention is installed on the surface of the reactor chamber, in contact with the input fluid. It improves the local flow field by generating longitudinal vortices, enhancing the turbulence intensity and radial flow capacity of the fluid, thereby achieving a uniform distribution of material components within the flowing medium. Simultaneously, the longitudinal vortex generator occupies a small flow channel space and generates low pressure differential resistance, making it suitable for various types of compact UV reactors.

[0008] The technical solution adopted in this invention is as follows:

[0009] I. A longitudinal vortex generator for a compact ultraviolet reactor

[0010] The longitudinal vortex generator includes a base plate and a plurality of longitudinal vortex generating plates; the base plate is a circular ring structure or a spiral structure; the longitudinal vortex generating plates are arranged radially inside the base plate and are evenly spaced along the circumference of the base plate; the longitudinal vortex generating plates are inclined relative to the radial plane of the base plate; and the longitudinal vortex generating plates are connected to the inner plate surface of the base plate.

[0011] The longitudinal vortex generator plate adopts a pentahedral, hexahedral, or polyhedral plate structure. It has a bottom surface, a front surface, a rear surface, and several side surfaces. The bottom surface of the longitudinal vortex generator plate is an arc surface, with the center of the arc surface located on the axis of the bottom plate, ensuring that the bottom surface of the longitudinal vortex generator plate is in close contact with and connected to the inner surface of the bottom plate. The front and rear surfaces of the longitudinal vortex generator plate are arranged opposite to each other. Both the front and rear surfaces are planes or at least one is an arcuate surface. The orthographic projection of the front and rear surfaces is a triangle, quadrilateral, or polygon with at least one curved side, corresponding to the bottom surface of the quadrilateral or polygon.

[0012] Optionally, the longitudinal vortex generating plate adopts a pentahedral plate structure, and the five sides of the longitudinal vortex generating plate are the bottom surface, the front surface, the rear surface, the first side surface, and the second side surface. The included angles between the front surface and the rear surface of the longitudinal vortex generating plate and the radial plane of the bottom plate are the same and are all acute angles, that is, the included angles between the front surface and the rear surface of the longitudinal vortex generating plate and the bottom surface of the longitudinal vortex generating plate are the same and are all acute angles. The front surface and the rear surface are both connected to the bottom surface, and the first side surface and the second side surface are both connected to the bottom surface, the front surface, and the rear surface. The first side surface and the second side surface are connected along the side edge common to the two sides.

[0013] Optionally, the longitudinal vortex generator plate adopts a triangular plate-shaped structure or a streamlined plate-shaped structure. When the longitudinal vortex generator plate adopts a triangular plate-shaped structure, the front and rear surfaces of the longitudinal vortex generator plate are both triangular planes or curved surfaces. The orthographic projection shape of the front and rear surfaces is a single-arc triangle. The base of the single-arc triangle is an arc side corresponding to the base surface, and the two sides are both straight sides, corresponding to the first side and the second side respectively. The angles between the two sides and the base are both acute angles. The first and second side surfaces of the longitudinal vortex generator plate are both perpendicular to the front and rear surfaces and form an acute angle with the base surface. The second side surface is connected to the base surface, the front surface, the rear surface, and the first side surface. When the longitudinal vortex generator plate adopts a triangular plate-shaped structure, the front and rear surfaces of the longitudinal vortex generator plate are both triangular planes or curved surfaces. The orthographic projection shape of the front and rear surfaces is a single-arc triangle. The base of the single-arc triangle is an arc side corresponding to the base surface, and the two sides are straight sides, corresponding to the first side surface and the second side surface respectively. The angles between the two sides and the base are both acute angles. The first and second side surfaces of the longitudinal vortex generator plate are both perpendicular to the front and rear surfaces and form an acute angle with the base surface. The second side surface is connected to the base surface, the front surface, the rear surface, and the first side surface. When the generating plate adopts a streamlined plate structure, the front and rear surfaces of the longitudinal vortex generating plate are both streamlined planes or curved surfaces. The orthographic projection shape of the front and rear surfaces is a double-arc triangle. The base of the double-arc triangle is the arc side corresponding to the bottom surface. The first side is an arc side, corresponding to the first side surface, and the second side is a straight side, corresponding to the second side surface. The angles between the two sides and the base are both acute angles. The first side surface is a convex arc surface and is perpendicular to the front and rear surfaces. The second side surface is connected to the bottom surface, the front surface, the rear surface, and the first side surface. The angles between the first side surface and the second side surface and the bottom surface are both acute angles.

[0014] Optionally, the longitudinal vortex generating plate adopts a hexahedral plate structure, and the front and rear surfaces are both rectangular, trapezoidal or rhomboid planes or curved surfaces with at least one arc edge.

[0015] The longitudinal vortex generating plates are arranged in pairs on the base plate, with the two longitudinal vortex generating plates in each pair arranged either adjacent to each other or symmetrically. Specifically: when the two longitudinal vortex generating plates in each pair are arranged symmetrically, the two symmetrical longitudinal vortex generating plates form a pair, and the two longitudinal vortex generating plates are centrally symmetrical on the base plate, with each pair of longitudinal vortex generating plates evenly distributed on the base plate; when the two longitudinal vortex generating plates in each pair are arranged adjacent to each other, the two adjacent longitudinal vortex generating plates form a pair, and the two longitudinal vortex generating plates are axially symmetrical on the base plate, with each pair of longitudinal vortex generating plates evenly distributed on the base plate.

[0016] The longitudinal vortex generator is made of metal, polytetrafluoroethylene (PTFE), or translucent quartz material.

[0017] II. A compact ultraviolet reactor based on a longitudinal vortex generator

[0018] The compact ultraviolet reactor includes at least one ultraviolet radiation source, an inlet, an outlet, an inlet component, an outlet component, a reactor cavity, a transparent quartz tube, and the longitudinal vortex generator. The inlet, inlet component, reactor cavity, outlet component, and outlet are sequentially connected. The inlet and outlet components are respectively arranged at both ends of the reactor cavity. The longitudinal vortex generator, transparent quartz tube, and ultraviolet radiation source are arranged coaxially from the outside to the inside of the reactor cavity in a radial direction. The two ends of the reactor cavity are connected to the inlet and outlet components respectively by flanges, screws, and washers. The longitudinal vortex generator is connected to the inner wall of the reactor cavity by welding or other means. The two ends of the transparent quartz tube and ultraviolet radiation source are connected to the inlet and outlet components respectively by nuts and lamp caps. The reactor processing medium flows into the compact ultraviolet reactor from the inlet and flows out of the compact ultraviolet reactor from the outlet. The annular flow channel between the reactor cavity and the transparent quartz tube forms a reaction zone.

[0019] Optionally, the ultraviolet radiation source is a low-pressure mercury lamp, a medium-pressure mercury lamp, an amalgam ultraviolet lamp, an electrodeless ultraviolet lamp, or an LED ultraviolet generator;

[0020] Optionally, the light-transmitting quartz tube is made of optically fused silica;

[0021] Optionally, the inlet component, reactor chamber, and outlet component are all made of metal materials such as stainless steel.

[0022] Furthermore, on the same longitudinal vortex generator, the angle of attack of each longitudinal vortex generating plate is the same. That is, the longitudinal vortex generator has a fixed angle of attack facing the incoming flow direction.

[0023] The longitudinal vortex generator of this invention enhances the mass transfer capacity of the fluid medium inside the reactor, increasing the time the fluid medium receives ultraviolet irradiation and thus improving processing efficiency. Simultaneously, the longitudinal vortex generator occupies a small flow channel space and generates low pressure differential resistance, making it suitable for various compact ultraviolet reactors.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention provides an ultraviolet reactor with a longitudinal vortex generator. By generating longitudinal vortices, it improves the local flow field, enhances the turbulence intensity and radial flow capacity of the fluid, strengthens the mass transfer capacity of the fluid medium inside the reactor, and increases the time the fluid medium receives ultraviolet irradiation, thereby improving processing efficiency. Simultaneously, the longitudinal vortex generator occupies little flow channel space and generates low pressure differential resistance, making it suitable for various compact ultraviolet reactors. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the first longitudinal vortex generator provided in Embodiment 1 of the present invention;

[0027] Figure 2 This is a cross-sectional schematic diagram of the first longitudinal vortex generator provided in Embodiment 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the second longitudinal vortex generator provided in Embodiment 2 of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the third longitudinal vortex generator provided in Embodiment 3 of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the fourth longitudinal vortex generator provided in Embodiment 4 of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the ultraviolet reactor provided in Embodiment 5 of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the ultraviolet reactor provided in Embodiment 6 of the present invention;

[0033] Figure 8 This is a schematic diagram comparing the CFD simulation of organic matter degradation in the ultraviolet reactor provided in Example 5 of the present invention with that in the comparative example; wherein, (a) is the comparative example and (b) is the example.

[0034] Among them, 100, first longitudinal vortex generator; 101, base plate of first longitudinal vortex generator; 102, first longitudinal vortex generating plate; 110, second longitudinal vortex generator; 111, base plate of second longitudinal vortex generator; 112, second longitudinal vortex generating plate; 120, third longitudinal vortex generator; 121, base plate of third longitudinal vortex generator; 122, third longitudinal vortex generating plate; 130, fourth longitudinal vortex generator; 131, base plate of fourth longitudinal vortex generator; 132, fourth longitudinal vortex generating plate; 200, first ultraviolet reactor; 201, ultraviolet radiation source; 202, inlet; 203, outlet; 204, inlet component; 205, outlet component; 206, reactor cavity; 207, light-transmitting quartz tube; 208, flange; 209a, screw and washer; 209b, nut and lamp cap; 210, second ultraviolet reactor. Detailed Implementation

[0035] The technical solution of the present invention will be described and illustrated in detail below through specific embodiments. The described embodiments are only two preferred embodiments of the present invention, and not all embodiments. All other embodiments based on this embodiment, without any creative improvements made by those skilled in the art, are within the protection scope of this embodiment.

[0036] The first aspect of the present invention provides a longitudinal vortex generator for a compact ultraviolet reactor.

[0037] The longitudinal vortex generator provided by this invention includes a base plate and several longitudinal vortex generating plates. For example... Figures 1-5 As shown, longitudinal vortex generating plates are arranged radially inside the base plate and are evenly spaced along the circumference of the base plate. The longitudinal vortex generating plates are inclined relative to the radial plane of the base plate and are connected to the inner surface of the base plate. Specifically, the angle between the longitudinal vortex generating plates and the radial plane of the base plate is an acute angle.

[0038] In the longitudinal vortex generator provided by this invention, the base plate can be a circular ring structure (e.g., Figure 1 The base plate 101 of the first longitudinal vortex generator in the middle) or a spiral structure (such as...) Figure 5 The base plate 131 of the fourth longitudinal vortex generator.

[0039] In the longitudinal vortex generator provided by this invention, the longitudinal vortex generating plate can adopt a pentahedral, hexahedral, or polyhedral plate structure. The longitudinal vortex generating plate has a bottom surface, a front surface, a rear surface, and several side surfaces. The bottom surface of the longitudinal vortex generating plate is an arc surface, and the center of the arc surface is located on the axis of the bottom plate, so that the bottom surface of the longitudinal vortex generating plate is in close contact with the inner plate surface of the bottom plate and is connected to the inner plate surface of the bottom plate. The front surface and the rear surface of the longitudinal vortex generating plate are arranged opposite to each other. Both the front surface and the rear surface of the longitudinal vortex generating plate are planes or at least one is an arcuate surface. The orthographic projection of the front surface and the rear surface are triangles, quadrilaterals, or polygons with at least one arcuate side, and the arcuate side corresponds to the bottom surface of the quadrilateral or polygon.

[0040] The longitudinal vortex generator plate can adopt a five-sided plate structure. The five sides of the longitudinal vortex generator plate are the bottom surface, the front surface, the rear surface, the first side surface, and the second side surface. The included angles between the front surface and the rear surface of the longitudinal vortex generator plate and the radial plane of the bottom plate are the same and are both acute angles. That is, the included angles between the front surface and the rear surface of the longitudinal vortex generator plate and the bottom surface of the longitudinal vortex generator plate are the same and are both acute angles. The front surface and the rear surface are both connected to the bottom surface. The first side surface and the second side surface are both connected to the bottom surface, the front surface, and the rear surface. The first side surface and the second side surface are connected along the side edge common to the two sides.

[0041] Specifically, the longitudinal vortex generator plate can adopt a triangular plate-shaped structure (such as...). Figure 1 The first longitudinal vortex generating plate 102) or a streamlined plate structure (such as Figure 4 The third longitudinal vortex generator plate 122 in the middle.

[0042] When the longitudinal vortex generator plate adopts a triangular plate structure, such as Figures 1-3 as well as Figure 5 As shown, the front and rear surfaces of the longitudinal vortex generator plate are both triangular planes or curved surfaces. The orthographic projection shape of the front and rear surfaces is a single-arc triangle, with the base of the single-arc triangle being the arc side of the corresponding base surface (i.e., the connecting edge between the base surface and the front or rear surface). The two sides are both straight edges, corresponding to the first and second side surfaces respectively (i.e., the connecting edges between the first and second side surfaces and the triangular curved surface). The angles between the two side surfaces and the base are both acute angles. The first and second side surfaces of the longitudinal vortex generator plate are both perpendicular to the front and rear surfaces and form acute angles with the base surface. The second side surface is connected to the base surface, the front surface, the rear surface, and the first side surface.

[0043] When the longitudinal vortex generator plate adopts a streamlined plate structure, the front and rear surfaces of the longitudinal vortex generator plate are both streamlined planes or curved surfaces. The orthographic projection shape of the front and rear surfaces is a double-arc triangle. The base of the double-arc triangle is the arc side of the corresponding base surface. The first side is an arc side, corresponding to the first side surface, and the second side is a straight side, corresponding to the second side surface. The angles between the two sides and the base are both acute angles. The first side surface is a convex arc surface and is perpendicular to the front and rear surfaces. The second side surface is connected to the base surface, the front surface, the rear surface, and the first side surface. The angles between the first side surface, the second side surface, and the base are both acute angles.

[0044] Furthermore, the number of longitudinal vortex generating plates is even, and all longitudinal vortex generating plates are arranged in pairs on the base plate. Within each pair, the two longitudinal vortex generating plates are arranged either adjacent to each other or symmetrically. Specifically: when the two longitudinal vortex generating plates in each pair are arranged symmetrically, the two symmetrical longitudinal vortex generating plates form a pair, and the two longitudinal vortex generating plates are centrally symmetrical on the base plate, with each pair of longitudinal vortex generating plates evenly distributed on the base plate; when the two longitudinal vortex generating plates in each pair are arranged adjacent to each other, the two adjacent longitudinal vortex generating plates form a pair, and the two longitudinal vortex generating plates are axially symmetrical on the base plate, with each pair of longitudinal vortex generating plates evenly distributed on the base plate.

[0045] Furthermore, the longitudinal vortex generator is made of metal, polytetrafluoroethylene (PTFE), or translucent quartz material.

[0046] A second aspect of the present invention provides a compact ultraviolet reactor with a longitudinal vortex generator. The compact ultraviolet reactor provided by the present invention includes at least one ultraviolet radiation source 201, an inlet 202, an outlet 203, an inlet component 204, an outlet component 205, a reactor cavity 206, a light-transmitting quartz tube 207, and a longitudinal vortex generator.

[0047] Inlet 202, inlet component 204, reactor cavity 206, outlet component 205 and outlet 203 are connected in sequence. Inlet component 204 and outlet component 205 are respectively arranged at both ends of reactor cavity 206. Longitudinal vortex generator, light-transmitting quartz tube 207 and ultraviolet radiation source 201 are arranged coaxially from the outside to the inside in the radial direction inside reactor cavity 206.

[0048] Specifically, the longitudinal vortex generator has a fixed angle of attack facing the incoming flow direction.

[0049] The reactor cavity 206 is connected to the inlet component 204 and the outlet component 205 at both ends, respectively. In a specific implementation, the inlet end of the reactor cavity 206 is connected to the inlet component 204 via a flange 208, screws, and a washer 209a, and the outlet end of the reactor cavity 206 is connected to the outlet component 205 via a flange 208, screws, and a washer 209a.

[0050] The longitudinal vortex generator is connected to the inner wall of the reactor cavity 206. In specific implementations, the longitudinal vortex generator can be installed on the inner wall of the reactor cavity 206 by means of welding or other methods.

[0051] The two ends of the light-transmitting quartz tube 207 and the ultraviolet radiation source 201 are connected to the inlet component 204 and the outlet component 205, respectively. In a specific implementation, the inlet end of the light-transmitting quartz tube 207 and the ultraviolet radiation source 201 can be connected to the inlet component 204 through a nut and a lamp cap 209b, and the outlet end of the light-transmitting quartz tube 207 and the ultraviolet radiation source 201 can be connected to the outlet component 205 through a nut and a lamp cap 209b.

[0052] The reactor treatment medium flows into the compact ultraviolet reactor from the inlet 202 and flows out of the compact ultraviolet reactor from the outlet 203. The annular flow channel between the reactor cavity 206 and the light-transmitting quartz tube 207 forms the reaction zone.

[0053] Optionally, the ultraviolet radiation source 201 can be a low-pressure mercury lamp, a medium-pressure mercury lamp, an amalgam ultraviolet lamp, an electrodeless ultraviolet lamp, or an LED ultraviolet generator.

[0054] Optionally, the transparent quartz tube 207 is made of optical fused silica.

[0055] Optionally, the inlet component 204, the reactor chamber 206, and the outlet component 205 are all made of metal materials such as stainless steel.

[0056] The working principle of the compact ultraviolet reactor provided by this invention is as follows:

[0057] The ultraviolet radiation source 201 is located inside the light-transmitting quartz tube 207. The fluid medium used or processed flows through the annular flow channel formed between the outer peripheral surface of the ultraviolet light-transmitting tube and the inner wall surface of the reactor chamber. The longitudinal vortex generator is installed on the inner wall surface of the reactor chamber and is in contact with the input fluid. It improves the local flow field by generating longitudinal vortices and enhances the turbulence intensity and radial flow capability of the fluid.

[0058] Specific embodiments of the present invention are as follows:

[0059] Reference Figures 1-5 This is a schematic diagram of a longitudinal vortex generator structure suitable for ultraviolet reactors, provided in an embodiment of the present invention. Longitudinal vortices include various types. Figures 1-5Only a few preferred embodiments are shown, from top to bottom: a first longitudinal vortex generator 100, a cross-sectional view of the first longitudinal vortex generator 100, a second longitudinal vortex generator 110, a third longitudinal vortex generator 120, and a fourth longitudinal vortex generator 130. The longitudinal vortex bodies of the first longitudinal vortex generator 100 and the third longitudinal vortex generator 120 are symmetrically distributed, while the longitudinal vortex bodies of the second longitudinal vortex generator 110 and the fourth longitudinal vortex generator 130 are adjacently distributed.

[0060] Example 1

[0061] Figure 1 The first longitudinal vortex generator 100 is shown to be a delta wing longitudinal vortex generator. The first longitudinal vortex generating plate 102 is a triangular plate-shaped structure.

[0062] Figure 2 This is a cross-sectional schematic diagram of the first longitudinal vortex generator 100. Figure 2 The diagram shows two pairs of first longitudinal vortex generating plates 102, with two of each pair of first longitudinal vortex generating plates 102 symmetrically arranged on the base plate 101 of the first longitudinal vortex generator.

[0063] The first longitudinal vortex generator plate 102 has a design length of l and a design height of h. The angle between the aforementioned parallel arc surfaces and the bottom surface is α. The angle of attack between the first longitudinal vortex generator plate 102 and the incoming flow direction is β. The width and diameter of the bottom plate 101 of the first longitudinal vortex generator are designed according to the size of the ultraviolet reactor cavity.

[0064] Example 2

[0065] Figure 3 The second longitudinal vortex generator 110 shown is similar to the first longitudinal vortex generator 100, and is also a delta wing longitudinal vortex generator. The second longitudinal vortex generating plate 112 is also a delta plate structure.

[0066] Figure 3 It includes three pairs of second longitudinal vortex generating plates 112, which are arranged at intervals on the base plate 111 of the second longitudinal vortex generator, with two of the second longitudinal vortex generating plates 112 in each pair arranged adjacent to each other.

[0067] Example 3

[0068] Figure 4 The third longitudinal vortex generator 120 is shown, which is arranged in a similar manner to the first longitudinal vortex generator 100. It also includes two pairs of third longitudinal vortex generating plates 122, and the two third longitudinal vortex generating plates 122 in each pair are symmetrically arranged on the base plate 121 of the third longitudinal vortex generator.

[0069] The third longitudinal vortex generator plate 122 has a streamlined sheet-like structure.

[0070] Example 4

[0071] Figure 5 The fourth longitudinal vortex generator 130 is shown. The fourth longitudinal vortex generator 130 is a spiral longitudinal vortex generator. The base plate 131 of the fourth longitudinal vortex generator is spiral-shaped. The fourth longitudinal vortex generating plate 132 has a similar structure to the second longitudinal vortex generating plate 112. Each pair of fourth longitudinal vortex generating plates 132 is evenly and uniformly distributed adjacent to each other on the spiral base plate 131 of the fourth longitudinal vortex generator.

[0072] Example 5

[0073] like Figure 6 As shown, this embodiment is a first ultraviolet reactor 200 having a first longitudinal vortex generator 100, which includes:

[0074] An ultraviolet radiation source 201, using a low-pressure amalgam ultraviolet lamp, can simultaneously emit 185nm (VUV) and 254nm (UV) ultraviolet light, generating UV / VUV-based advanced oxidation reactions that can mineralize / degrade organic pollutants;

[0075] A light-transmitting quartz tube 207, made of optical fused silica, is capable of simultaneously transmitting 185nm (VUV) and 254nm (UV) ultraviolet rays, and an ultraviolet radiation source 201 is placed in the light-transmitting quartz tube 207.

[0076] The reactor body is composed of an inlet component 204, an outlet component 205, and a reactor cavity 206. The reactor cavity 206 is connected to the inlet component 204 and the outlet component 205 via a flange 208, screws, and washers 209a. The ultraviolet radiation source 201, the light-transmitting quartz tube 207, and the reactor cavity 206 are arranged concentrically. The ultraviolet radiation source 201 and the light-transmitting quartz tube 207 are connected to the inlet component 204 and the outlet component 205 via nuts and lamp caps 209b. The reactor treatment medium flows in from the inlet port 202 and flows out from the outlet port 203.

[0077] In this embodiment, the light-transmitting quartz tube 207, the inlet component 204, the outlet component 205, and the reactor cavity 206 constitute the reaction zone, and the annular flow channel formed by the light-transmitting quartz tube 207 and the reactor cavity 206 is the main reaction zone.

[0078] In this preferred embodiment, the longitudinal vortex generator uses a first longitudinal vortex generator 100.

[0079] In this preferred embodiment, the outer diameter of the first longitudinal vortex generator 100 is equal to that of the reactor cavity 206; the angle of attack β between the first longitudinal vortex generating plate 102 and the direction of the incoming flow of the processing medium is 60 degrees; the angle α between the parallel arc surfaces of the first longitudinal vortex generating plate 102 and the bottom surface is 80 degrees; and the ratio of the height h of the first longitudinal vortex generating plate 102 to the hydraulic diameter of the annular flow channel formed by the light-transmitting quartz tube 207 and the reactor cavity 206 is 0.25.

[0080] In this preferred embodiment, the first longitudinal vortex generator 100 is a transparent structure and is uniformly arranged on the inner wall of the reactor cavity 206 along the axial direction of the reactor cavity 206.

[0081] In this preferred embodiment, the volume of the first longitudinal vortex generator 100 accounts for only 0.17% of the main reaction zone consisting of the transparent quartz tube 207 and the reactor cavity 206.

[0082] Example 6

[0083] like Figure 7 As shown, in this embodiment, to enhance the turbulence intensity in the reaction zone, a second ultraviolet reactor 210 is provided. The second ultraviolet reactor 210 has the fourth longitudinal vortex generator 130 as described in Embodiment 4 of the present invention. Figure 5 ), which includes,

[0084] The second ultraviolet reactor 210 includes the same reactor body as in Example 5 (mainly composed of inlet component 204, outlet component 205 and reactor cavity 206), a light-transmitting quartz tube 207 and an ultraviolet radiation source 201.

[0085] In this preferred embodiment, the longitudinal vortex generator uses a fourth longitudinal vortex generator 130.

[0086] In this preferred embodiment, the fourth longitudinal vortex generator 130 is fixed on the reactor cavity 206, and the outer diameter of the fourth longitudinal vortex generator 130 is equal to that of the reactor cavity 206.

[0087] Dozens of fourth longitudinal vortex generating plates 132 are evenly arranged on the inner side of the base plate 131 of the fourth longitudinal vortex generator.

[0088] The angle of attack β between the fourth longitudinal vortex generating plate 132 and the direction of the incoming flow of the treatment medium is 60 degrees; the ratio of the height h of the fourth longitudinal vortex generating plate 132 to the hydraulic diameter of the annular flow channel formed by the transparent quartz tube 207 and the reactor cavity 206 is 0.25.

[0089] Comparative Example

[0090] This comparative example is an ultraviolet reactor that does not use this longitudinal vortex generator.

[0091] Figure 8This is a schematic diagram comparing the first ultraviolet reactor 200 in Embodiment 5 of the present invention with the ultraviolet reactor in the comparative example, using inclined inflow and outflow methods in a CFD simulation of organic matter degradation. In the example, the inlet water contains 300 ppb of pollutant pCBA, the inlet mass flow rate is 0.64 kg / s, and the design and arrangement of the first longitudinal vortex generator are similar to... Figure 6 same.

[0092] As can be seen, the pollutant concentration at the outlet of the UV reactor provided in the comparative example without using this longitudinal vortex generator was 40.9 ppb, while the pollutant concentration at the outlet of the first UV reactor 200 provided in Example 5 was 4.1 ppb, indicating a significant improvement in organic matter degradation efficiency.

[0093] In reactors without the longitudinal vortex generator, the water flow velocity in the lower half of the reactor is higher, resulting in a shorter contact time with ultraviolet light and a shorter reaction time. Consequently, the concentration in the lower half of the reactor is significantly higher than that in the upper half. In ultraviolet reactors using the longitudinal vortex generator, the generator contacts the input fluid, improving the local flow field, enhancing the turbulence intensity and radial flow capacity of the fluid, achieving a uniform distribution of material components within the flowing medium, and significantly increasing the degradation efficiency of organic matter.

[0094] This invention provides an ultraviolet reactor with a longitudinal vortex generator. By generating longitudinal vortices, it improves the local flow field, enhances the turbulence intensity and radial flow capacity of the fluid, strengthens the mass transfer capacity of the fluid medium inside the reactor, and increases the time the fluid medium receives ultraviolet irradiation, thereby improving processing efficiency. Simultaneously, the longitudinal vortex generator occupies little flow channel space and generates low pressure differential resistance, making it suitable for various compact ultraviolet reactors.

[0095] The two preferred embodiments of the present invention have been described in detail above, but are merely illustrative examples. Furthermore, the scope of the present invention is not limited to the above examples. Any equivalent modifications and substitutions made to the above examples by those skilled in the art are also within the scope of the present invention. Therefore, any equivalent modifications and substitutions made without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A longitudinal vortex generator for an ultraviolet reactor, characterized by: The longitudinal vortex generator comprises a bottom plate and a plurality of longitudinal vortex plates; the bottom plate is in a circular ring structure or a spiral structure; the longitudinal vortex plates are arranged on the inner side of the bottom plate in the radial direction and are uniformly arranged along the circumferential direction of the bottom plate; the longitudinal vortex plates are arranged in an inclined manner relative to the radial plane of the bottom plate; the longitudinal vortex plates are connected with the inner plate surface of the bottom plate; The longitudinal vortex plates are in a triangular plate structure or a streamlined plate structure; the longitudinal vortex plates have a bottom surface, a front surface, a rear surface and a plurality of side surfaces; the bottom surface of the longitudinal vortex plates is a curved surface and is connected with the inner plate surface of the bottom plate; the front surface and the rear surface of the longitudinal vortex plates are arranged oppositely; the front surface and the rear surface of the longitudinal vortex plates are both planar or at least one of them is curved; the front surface and the rear surface are both triangular or polygonal in the orthographic projection and have at least one arc edge. The longitudinal vortex plates are arranged in pairs on the bottom plate; the two longitudinal vortex plates in each pair of longitudinal vortex plates are arranged adjacently or symmetrically; when the two longitudinal vortex plates in each pair of longitudinal vortex plates are arranged symmetrically, the two longitudinal vortex plates are centrally symmetric on the bottom plate; the pairs of longitudinal vortex plates are uniformly distributed on the bottom plate; when the two longitudinal vortex plates in each pair of longitudinal vortex plates are arranged adjacently, the two longitudinal vortex plates are axially symmetric on the bottom plate; the pairs of longitudinal vortex plates are uniformly distributed on the bottom plate.

2. The longitudinal vortex generator for an ultraviolet reactor of claim 1, wherein: The longitudinal vortex plates are in a pentahedron plate structure; the five surfaces of the longitudinal vortex plates are a bottom surface, a front surface, a rear surface, a first side surface and a second side surface; the front surface and the rear surface of the longitudinal vortex plates have the same acute angle with the radial plane of the bottom plate; the front surface and the rear surface are connected with the bottom surface; the first side surface and the second side surface are connected with the bottom surface, the front surface and the rear surface; the first side surface and the second side surface are connected along the side edge shared by the two side surfaces.

3. The longitudinal vortex generator for an ultraviolet reactor of claim 2, wherein: When the longitudinal vortex plates are in a triangular plate structure, the orthographic projection shape of the front surface and the rear surface is a single-arc triangle; the bottom edge of the single-arc triangle is an arc edge corresponding to the bottom surface; the two side edges are straight edges corresponding to the first side surface and the second side surface respectively; the acute angles between the two side edges and the bottom edge are acute angles; when the longitudinal vortex plates are in a streamlined plate structure, the orthographic projection shape of the front surface and the rear surface is a double-arc triangle; the bottom edge of the double-arc triangle is an arc edge corresponding to the bottom surface; the first side edge is an arc edge corresponding to the first side surface; the second side edge is a straight edge corresponding to the second side surface; the acute angles between the two side edges and the bottom edge are acute angles.

4. The longitudinal vortex generator for an ultraviolet reactor of claim 1, wherein: The longitudinal vortex generator is made of metal, polytetrafluoroethylene or light-transmitting quartz material.

5. A compact UV reactor employing the longitudinal vortex generator according to any one of claims 1 to 4, characterized in that: The compact ultraviolet reactor comprises at least one ultraviolet radiation light source (201), an inflow port (202), an outflow port (203), an inflow component (204), an outflow component (205), a reactor cavity (206), a light-transmitting quartz tube (207) and the longitudinal vortex generator; the inflow port (202), the inflow component (204), the reactor cavity (206), the outflow component (205) and the outflow port (203) are sequentially communicated, the inflow component (204) and the outflow component (205) are arranged at two ends of the reactor cavity (206) respectively, the longitudinal vortex generator, the light-transmitting quartz tube (207) and the ultraviolet radiation light source (201) are coaxially arranged in the reactor cavity (206) from outside to inside along a radial direction; two ends of the reactor cavity (206) are connected with the inflow component (204) and the outflow component (205) respectively, the longitudinal vortex generator is connected with an inner wall of the reactor cavity (206), two ends of the light-transmitting quartz tube (207) and the ultraviolet radiation light source (201) are connected with the inflow component (204) and the outflow component (205) respectively, reactor processing medium flows into the compact ultraviolet reactor from the inflow port (202) and flows out of the compact ultraviolet reactor from the outflow port (203), and an annular flow channel between the reactor cavity (206) and the light-transmitting quartz tube (207) forms a reaction zone.

6. The compact ultraviolet reactor of claim 5, wherein: The ultraviolet radiation light source (201) is a low-pressure mercury lamp, a medium-pressure mercury lamp, a mercury amalgam ultraviolet lamp, an electrodeless ultraviolet lamp or an LED ultraviolet generator; and / or the light-transmitting quartz tube (207) is made of optical fused quartz; and / or the inflow component (204), the reactor cavity (206) and the outflow component (205) are all made of metal materials.

7. The compact ultraviolet reactor of claim 5, wherein: The attack angles of the longitudinal vortex generator plates on the same longitudinal vortex generator are the same.

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