Compact ultraviolet reactor adopting longitudinal vortex generator

Abstract

The invention discloses a compact ultraviolet reactor adopting a longitudinal vortex generator. The longitudinal vortex generator comprises a bottom plate and a plurality of longitudinal vortex generating plates; the bottom plate is of an annular structure or a spiral structure, and the longitudinal vortex generating plate is of a pentahedral, hexahedral or polyhedral plate-shaped structure; the longitudinal vortex generating plates are uniformly arranged at intervals in the circumferential direction of the bottom plate and are obliquely arranged relative to the radial plane of the bottom plate; the compact ultraviolet reactor comprises an ultraviolet radiation light source, a light-transmitting quartz tube, a longitudinal vortex reactor and a reactor cavity which are coaxially arranged, and an annular flow channel between the reactor cavity and the light-transmitting quartz tube forms a reaction area. The longitudinal vortex generator enhances the mass transfer capacity of a fluid medium in the reactor, can prolong the time for the fluid medium to receive ultraviolet radiation, thereby improving the treatment efficiency, and is small in occupied flow channel space, small in generated differential pressure resistance and suitable for various compact ultraviolet reactors.

Description

Technical Field

[0001] The invention relates to ultraviolet light treatment fluid, in particular to a compact ultraviolet reactor using a longitudinal vortex generator. Background Art

[0002] Ultraviolet radiation (UV) 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 ultraviolet radiation relies on inactivating microorganisms by changing their DNA, making them unable to reproduce. At the same time, advanced oxidation technology based on ultraviolet is used, that is, ultraviolet radiation is used with chemicals (such as hydrogen peroxide, ozone, persulfate, etc.) or vacuum ultraviolet (VUV) to produce hydroxyl radicals with strong oxidizing properties to degrade / mineralize organic pollution in water.

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

[0004] For areas with limited space, such as secondary purification of semiconductor immersion liquid, it is difficult to use multiple radiation sources to form a uniform radiation field. To address this type of problem, U.S. Patent No. 2021 / 0244833A1 provides a device that uses a reflective material with high reflectivity and a processing chamber that is at least 80% closed in a liquid or gas processing device, combined with a UV transparent tube and a UV lamp, to 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. In addition, U.S. Patent No. 2015 / 0246148A1 provides a compact system comprising at least one optical system and a reactor, the reactor having a hollow body shape, including sides, a connecting portion and an inner cavity, which can be open to the front and rear sides, through which a medium flows or exists. The reactor design is composed of radiation reflectors of the first and second functional areas, so that the entire inner cavity of the reactor is subjected to a very uniform radiation density.

[0005] As for the optimization of the fluid dynamics inside the UV reactor, the existing technology mainly enhances the turbulence intensity inside the flow channel by adding baffles, such as the UV reactor proposed in British Patent GB 2548379A. However, this technology requires a large space in the reactor flow channel and is mostly used in large-volume multi-lamp systems. The baffles occupy a large space in the flow channel and cannot be applied to compact UV reactors with limited space.

[0006] Longitudinal vortex generators are mostly used in the field of enhanced heat exchange. Their main function is to form a local longitudinal vortex structure in the fluid area. This longitudinal vortex structure has a long path and can fully mix the fluid in the tube. Therefore, the design of a longitudinal vortex generator suitable for a compact UV reactor can enhance the mixing of substances in the UV reactor, so that the reaction substances can obtain effective radiation to the greatest extent and improve the efficiency of the reactor. Summary of the invention

[0007] In order to solve the above problems, the present invention discloses a compact ultraviolet reactor using a longitudinal vortex generator. The longitudinal vortex generator suitable for the ultraviolet reactor provided by the present invention is installed on the surface of the reactor chamber and contacts the input fluid. By generating longitudinal vortices, the local flow field is improved, the turbulence intensity and radial flow capacity of the fluid are enhanced, and the uniform distribution of the material components in the flow medium is achieved. At the same time, the longitudinal vortex generator occupies a small flow channel space and generates a small pressure difference resistance, which is suitable for various types of compact ultraviolet reactors.

[0008] The technical solution adopted by the present invention is as follows:

[0009] 1. A longitudinal vortex generator for compact UV 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 on the radial inner side of the base plate and are evenly spaced along the circumference of the base plate; the longitudinal vortex generating plates are arranged 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 generating plate adopts a pentahedral, hexahedral or polyhedral plate structure, and the longitudinal vortex generating plate has a bottom surface, a front surface, a rear surface and a plurality of 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 tightly fitted with the inner plate surface of the bottom plate and 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 relatively, and the front surface and the rear surface of the longitudinal vortex generating plate are both planes or at least one is a radian curved surface. The orthographic projections of the front surface and the rear surface are both triangles, quadrilaterals or polygons with at least one arc edge, and the arc edge corresponds to the bottom surface of the quadrilateral or polygon.

[0012] Optionally, the longitudinal vortex generating plate adopts a pentahedral plate structure, and the five surfaces of the longitudinal vortex generating plate are respectively a bottom surface, a front surface, a rear surface, a first side surface and a second side surface; the 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 both acute angles, that is, the 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 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, and the first side surface and the second side surface are connected along the side edge common to the two side surfaces.

[0013] Optionally, the longitudinal vortex generating plate adopts a triangular plate structure or a streamlined plate structure. When the longitudinal vortex generating plate adopts a triangular plate structure, the front surface and the rear surface of the longitudinal vortex generating plate are both triangular planes or curved surfaces, and the orthographic projection shape of the front surface and the rear surface is a single arc triangle, the base of the single arc triangle is an arc edge corresponding to the bottom surface, and the two side edges are both straight edges, corresponding to the first side surface and the second side surface respectively, and the angles between the two side edges and the bottom edge are both acute angles; the first side surface and the second side surface of the longitudinal vortex generating plate are both perpendicular to the front and rear surfaces and have an acute angle with the bottom surface, and the second side surface is connected to the bottom surface, the front surface, the rear surface and the first side surface; when the longitudinal vortex generating plate adopts a triangular plate structure, the front surface and the rear surface are connected to the bottom surface, the front surface, the rear surface and the first side surface; when the longitudinal vortex generating plate adopts a triangular plate structure, the front surface and the rear surface are connected to the bottom surface, the front surface and the rear surface. When the generating plate adopts a streamlined plate structure, the front surface and the rear surface of the longitudinal vortex generating plate are both streamlined planes or curved surfaces, and the orthographic projection shape of the front surface and the rear surface 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 the arc side, corresponding to the first side surface, the second side is a straight side, corresponding to the second side surface, and 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, and 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 surface and the rear surface are both rectangular, trapezoidal or rhombus-shaped planes or radian curved surfaces with at least one arc edge.

[0015] The longitudinal vortex generating plates are arranged in pairs on the bottom plate, and the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged adjacently at intervals or symmetrically. Specifically: when the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged symmetrically, the two symmetrical longitudinal vortex generating plates form a pair, the two longitudinal vortex generating plates are centrally symmetrical on the bottom plate, and each pair of longitudinal vortex generating plates is evenly distributed on the bottom plate; when the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged adjacently at intervals, the two adjacent longitudinal vortex generating plates form a pair, the two longitudinal vortex generating plates are axisymmetric on the bottom plate, and each pair of longitudinal vortex generating plates is evenly distributed on the bottom plate.

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

[0017] 2. A compact UV reactor based on longitudinal vortex generator

[0018] The compact ultraviolet reactor comprises at least one ultraviolet radiation light source, an inlet, an outlet, an inflow component, an outflow component, a reactor cavity, a light-transmitting quartz tube and the longitudinal vortex reactor; the inlet, the inflow component, the reactor cavity, the outflow component and the outlet are connected in sequence, the inflow component and the outflow component are respectively arranged at two ends of the reactor cavity, the longitudinal vortex reactor, the light-transmitting quartz tube and the ultraviolet radiation light source are coaxially arranged in sequence inside the reactor cavity from outside to inside along the radial direction; the two ends of the reactor cavity are respectively connected to the inflow component and the outflow component through flanges, screws and washers, the longitudinal vortex reactor is connected to the inner wall of the reactor cavity through welding and the like, the two ends of the light-transmitting quartz tube and the ultraviolet radiation light source are respectively connected to the inflow component and the outflow component through nuts and lamp caps, the reactor treatment medium flows into the compact ultraviolet reactor from the inlet and flows out of the compact ultraviolet reactor from the outlet, and the annular flow channel between the reactor cavity and the light-transmitting quartz tube forms a reaction zone.

[0019] Optionally, the ultraviolet radiation light 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 optical fused quartz;

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

[0022] Furthermore, on the same longitudinal vortex reactor, the flow angles of the longitudinal vortex generating plates are the same, that is, the longitudinal vortex reactor has a fixed flow angle facing the incoming flow direction.

[0023] The longitudinal vortex generator of the present invention enhances the mass transfer capacity of the fluid medium inside the reactor, can increase the time the fluid medium receives ultraviolet radiation, thereby improving the processing efficiency. At the same time, the longitudinal vortex generator occupies a small flow channel space, generates a small pressure difference resistance, and is suitable for various compact ultraviolet reactors.

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

[0025] The present invention provides an ultraviolet reactor with a longitudinal vortex generator, which improves the local flow field by generating longitudinal vortices, enhances the turbulence intensity and radial flow capacity of the fluid, strengthens the mass transfer capacity of the fluid medium inside the reactor, and can increase the time for the fluid medium to receive ultraviolet radiation, thereby improving the processing efficiency. At the same time, the longitudinal vortex generator occupies a small flow channel space and generates a small pressure difference resistance, which is suitable for various types of compact ultraviolet reactors. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a first longitudinal vortex generator provided in Example 1 of the present invention;

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

[0028] Figure 3 A schematic structural diagram of a second longitudinal vortex generator provided in Example 2 of the present invention;

[0029] Figure 4 A schematic structural diagram of a third longitudinal vortex generator provided in Example 3 of the present invention;

[0030] Figure 5 A schematic structural diagram of a fourth longitudinal vortex generator provided in Example 4 of the present invention;

[0031] Figure 6 A schematic diagram of the structure of an ultraviolet reactor provided in Example 5 of the present invention;

[0032] Figure 7 A schematic diagram of the structure of the ultraviolet reactor provided in Example 6 of the present invention;

[0033] Figure 8 Schematic diagram of CFD simulation comparison of organic matter degradation in UV reactor provided in Example 5 of the present invention and the comparative example; wherein (a) is the comparative example and (b) is the embodiment.

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

[0035] The technical solution of the present invention is introduced and described in detail by specific embodiments below. The described embodiments are only two preferred implementation schemes of the present invention, not all embodiments. Based on this embodiment, the remaining embodiments made by the technical personnel in this field without any creative improvement are all within the protection scope of this embodiment.

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

[0037] The longitudinal vortex generator provided by the present invention comprises a bottom plate and a plurality of longitudinal vortex generating plates. Figure 1 to Figure 5 As shown, the longitudinal vortex generating plate is arranged on the radial inner side of the bottom plate and is evenly spaced along the circumference of the bottom plate. The longitudinal vortex generating plate is arranged obliquely relative to the radial plane of the bottom plate, and the longitudinal vortex generating plate is connected to the inner plate surface of the bottom plate. Specifically, the plane angle of the longitudinal vortex generating plate relative to the radial plane of the bottom plate is an acute angle.

[0038] In the longitudinal vortex generator provided by the present invention, the bottom plate may be a circular ring structure (such as Figure 1 The bottom plate 101 of the first longitudinal vortex generator) or the spiral structure (such as Figure 5 The bottom plate 131 of the fourth longitudinal vortex generator.

[0039] In the longitudinal vortex generator provided by the present invention, the longitudinal vortex generating plate can adopt a pentahedral, hexahedral or polyhedral plate structure, and the longitudinal vortex generating plate has a bottom surface, a front surface, a rear surface and a plurality of side surfaces, and 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 tightly fitted 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 oppositely, and the front surface and the rear surface of the longitudinal vortex generating plate are both planes or at least one is a radian curved surface, and the orthographic projections of the front surface and the rear surface are both triangles, quadrilaterals or polygons with at least one arc edge, and the arc edge corresponds to the bottom surface of the quadrilateral or polygon.

[0040] The longitudinal vortex generating plate can adopt a pentahedral plate structure, and the five surfaces of the longitudinal vortex generating plate are respectively the bottom surface, the front surface, the rear surface, the first side surface and the second side surface; the 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 both acute angles, that is, the 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 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, and the first side surface and the second side surface are connected along the side edge common to the two side surfaces.

[0041] Specifically, the longitudinal vortex generating plate can adopt a triangular plate structure (such as Figure 1 The first longitudinal vortex generating plate 102 in the embodiment of the present invention) or a streamlined plate structure (such as Figure 4 The third longitudinal vortex generating plate 122 in the embodiment.

[0042] When the longitudinal vortex generating plate adopts a triangular plate structure, such as Figure 1 to Figure 3 as well as Figure 5 As shown, the front and rear surfaces of the longitudinal vortex generating plate are both triangular planes or radian curved surfaces, and the orthographic projection shapes of the front and rear surfaces are single arc triangles, the base of the single arc triangle is the arc edge corresponding to the bottom surface (i.e., the connecting edge between the bottom surface and the front surface or the rear surface), and the two side edges are both straight edges, corresponding to the first side surface and the second side surface (i.e., the connecting edge between the first side surface, the second side surface and the triangular radian surface), and the angles between the two side edges and the bottom edge are both acute angles. The first side surface and the second side surface of the longitudinal vortex generating plate are both perpendicular to the front and rear surfaces and have an acute angle with the bottom surface, and the second side surface is connected to the bottom surface, the front surface, the rear surface and the first side surface.

[0043] When the longitudinal vortex generating plate adopts a streamlined plate structure, the front surface and the rear surface of the longitudinal vortex generating plate are both streamlined planes or curved surfaces, and the orthographic projection shape of the front surface and the rear surface 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 the arc side, corresponding to the first side surface, the second side is a straight side, corresponding to the second side surface, and 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, and the angles between the first side surface and the second side surface and the bottom surface are both acute angles.

[0044] Furthermore, the number of longitudinal vortex generating plates is an even number, and all longitudinal vortex generating plates are arranged in pairs on the bottom plate, and the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged adjacently at intervals or symmetrically. Specifically: when the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged symmetrically, the two symmetrical longitudinal vortex generating plates form a pair, the two longitudinal vortex generating plates are centrally symmetrical on the bottom plate, and each pair of longitudinal vortex generating plates is evenly distributed on the bottom plate; when the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged adjacently at intervals, the two adjacent longitudinal vortex generating plates form a pair, the two longitudinal vortex generating plates are axisymmetric on the bottom plate, and each pair of longitudinal vortex generating plates is evenly distributed on the bottom plate.

[0045] Furthermore, the longitudinal vortex generator is made of metal, polytetrafluoroethylene PTFE or light-transmitting quartz material.

[0046] The 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 comprises at least one ultraviolet radiation light 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 reactor.

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

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

[0049] The two ends of the reactor cavity 206 are respectively connected to the inflow component 204 and the outflow component 205. In a specific implementation, the inflow end of the reactor cavity 206 is connected to the inflow component 204 through a flange 208, a screw and a washer 209a, and the outflow end of the reactor cavity 206 is connected to the outflow component 205 through a flange 208, a screw and a washer 209a.

[0050] The longitudinal vortex reactor is connected to the inner wall of the reactor cavity 206. In a specific implementation, the longitudinal vortex reactor can be installed on the inner wall of the reactor cavity 206 by welding or the like.

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

[0053] Optionally, the ultraviolet radiation light source 201 is 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 light-transmitting quartz tube 207 is made of optical fused quartz.

[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 UV reactor provided by the present invention is as follows:

[0057] The ultraviolet radiation light source 201 is arranged inside the transparent quartz tube 207, and the fluid medium used or processed flows through the annular flow channel formed between the outer peripheral surface of the ultraviolet transparent 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 contacts with the input fluid. By generating longitudinal vortices, the local flow field is improved, and the turbulence intensity and radial flow capacity of the fluid are enhanced.

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

[0059] Reference Figure 1-Figure 5 , which is a schematic diagram of the structure of a longitudinal vortex generator suitable for a UV reactor in an embodiment of the present invention, wherein the longitudinal vortex includes various types, Figure 1-Figure 5Only several preferred embodiments are shown, from top to bottom, respectively, a first longitudinal vortex generator 100, a cross-sectional schematic diagram 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. Among them, the longitudinal vortex bodies of the first longitudinal vortex generator 100 and the third longitudinal vortex generator 120 are symmetrically distributed, and 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 is a cross-sectional schematic diagram of the first longitudinal vortex generator 100, Figure 2 It is shown that two pairs of first longitudinal vortex generating plates 102 are included, and the two first longitudinal vortex generating plates 102 in each pair of first longitudinal vortex generating plates 102 are symmetrically arranged on the bottom plate 101 of the first longitudinal vortex generator.

[0063] The design length of the first longitudinal vortex generating plate 102 is l, the design height is h, the angle between the front and rear parallel curved surfaces and the bottom surface is α, the angle of attack of the first longitudinal vortex generating plate 102 and the incoming flow direction is β, and the width, diameter and other dimensional parameters 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 triangular plate-shaped structure.

[0066] Figure 3 It comprises three pairs of second longitudinal vortex generating plates 112 , which are arranged at intervals on the bottom plate 111 of the second longitudinal vortex generator, and two second longitudinal vortex generating plates 112 in each pair of second longitudinal vortex generating plates 112 are 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 and also includes two pairs of third longitudinal vortex generating plates 122 , and the two third longitudinal vortex generating plates 122 in each pair of third longitudinal vortex generating plates 122 are symmetrically arranged on the bottom plate 121 of the third longitudinal vortex generator.

[0069] The third longitudinal vortex generating plate 122 is a streamlined sheet structure.

[0070] Example 4

[0071] Figure 5 The fourth longitudinal vortex generator 130 is shown, and the fourth longitudinal vortex generator 130 is a spiral longitudinal vortex generator. The bottom plate 131 of the fourth longitudinal vortex generator is spiral-shaped, and the fourth longitudinal vortex generating plates 132 are similar in structure to the second longitudinal vortex generating plates 112. Each pair of fourth longitudinal vortex generating plates 132 are evenly distributed adjacent to each other at equal intervals on the bottom plate 131 of the spiral 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 light source 201, using a low-pressure amalgam ultraviolet lamp, capable of simultaneously emitting 185nm (VUV) and 254nm (UV) ultraviolet rays, generating a UV / VUV-based advanced oxidation reaction, capable of mineralizing / degrading organic pollutants;

[0075] A light-transmitting quartz tube 207, made of optical fused quartz, capable of transmitting both 185nm (VUV) and 254nm (UV) ultraviolet rays, wherein the 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 through a flange 208, screws and washers 209a; the ultraviolet radiation light source 201, the transparent quartz tube 207 and the reactor cavity 206 are concentrically arranged, and the ultraviolet radiation light source 201 and the transparent quartz tube 207 are connected to the inlet component 204 and the outlet component 205 through nuts and lamp caps 209b; the reactor treatment medium flows in from the inlet 202 and flows out from the outlet 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 a 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 the preferred embodiment, the longitudinal vortex reactor 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 the reactor cavity 206; the angle of attack β between the first longitudinal vortex generating plate 102 and the flow direction of the treatment medium is 60 degrees; the angle α between the front and rear parallel curved surfaces of the first longitudinal vortex generating plate 102 and the bottom surface is 80 degrees; 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 transparent quartz tube 207 and the reactor cavity 206 is 0.25.

[0080] In this preferred embodiment, the first longitudinal vortex generators 100 are transparent structures and are evenly arranged on the inner wall of the reactor cavity 206 along the axial direction of the reactor cavity 206 .

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

[0082] Example 6

[0083] like Figure 7 As shown, in this embodiment, in order to enhance the turbulence intensity in the reaction zone, a second ultraviolet reactor 210 is provided, and the second ultraviolet reactor 210 has the fourth longitudinal vortex generator 130 ( Figure 5 ), which includes,

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

[0085] In the preferred embodiment, the longitudinal vortex reactor 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 surface of the bottom plate 131 of the fourth longitudinal vortex generator.

[0088] The angle of attack β between the fourth longitudinal vortex generating plate 132 and the flow direction 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 a UV reactor without using the longitudinal vortex generator.

[0091] Figure 8Schematic diagram of CFD simulation comparison of organic matter degradation using inclined inflow and outflow modes for the first UV reactor 200 in Example 5 of the present invention and the UV reactor in the comparative example. In the example, the inlet water flow 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 is the same as that of the first UV reactor 200 in Example 5 of the present invention and the comparative example. Figure 6 same.

[0092] It can be seen that the pollutant concentration at the outlet of the ultraviolet reactor provided in the comparative example without using the longitudinal vortex generator is 40.9 ppb, and the pollutant concentration at the outlet of the first ultraviolet reactor 200 provided in Example 5 is 4.1 ppb, and the organic matter degradation efficiency is significantly improved.

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

[0094] The present invention provides an ultraviolet reactor with a longitudinal vortex generator, which improves the local flow field by generating longitudinal vortices, enhances the turbulence intensity and radial flow capacity of the fluid, strengthens the mass transfer capacity of the fluid medium inside the reactor, and can increase the time for the fluid medium to receive ultraviolet radiation, thereby improving the processing efficiency. At the same time, the longitudinal vortex generator occupies a small flow channel space and generates a small pressure difference resistance, which is suitable for various types of compact ultraviolet reactors.

[0095] The above two preferred embodiments of the present invention are specifically described, but they are only used as illustrative examples, and the contents of the present invention are not limited to the above examples. For those skilled in the art, any equivalent modifications and substitutions made to the above examples are also covered by 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 in that: It 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 on the radial inner side of the base plate and are evenly spaced along the circumference of the base plate; the longitudinal vortex generating plates are arranged 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.

2. The longitudinal vortex generator for an ultraviolet reactor according to claim 1, characterized in that: The longitudinal vortex generating plate adopts a pentahedral, hexahedral or polyhedral plate structure, and has a bottom surface, a front surface, a rear surface and a plurality of side surfaces. The bottom surface of the longitudinal vortex generating plate is a curved surface and is connected to the inner plate surface of the bottom plate; The front surface and rear surface of the longitudinal vortex generating plate are arranged opposite to each other, the front surface and rear surface of the longitudinal vortex generating plate are both planes or at least one is a curved surface, and the orthographic projections of the front surface and rear surface are both triangles, quadrilaterals or polygons with at least one arc edge.

3. The longitudinal vortex generator for a UV reactor according to claim 2, characterized in that: The longitudinal vortex generating plate adopts a pentahedral plate structure, and the five surfaces of the longitudinal vortex generating plate are respectively a bottom surface, a front surface, a rear surface, a first side surface and a second side surface; the 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 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, and the first side surface and the second side surface are connected along the side edge shared by the two side surfaces.

4. The longitudinal vortex generator for a UV reactor according to claim 3, characterized in that: The longitudinal vortex generating plate adopts a triangular plate structure or a streamlined plate structure; when the longitudinal vortex generating plate adopts a triangular plate structure, the orthographic projection shape of the front surface and the rear surface is a single-arc triangle, the base of the single-arc triangle is an arc side corresponding to the bottom surface, and the two sides are straight sides, corresponding to the first side surface and the second side surface respectively, and the angles between the two sides and the base are both acute angles; when the longitudinal vortex generating plate adopts a streamlined plate structure, the orthographic projection shape of the front surface and the rear surface is a double-arc triangle, the base of the double-arc triangle is an arc side corresponding to the bottom surface, the first side is an arc side, corresponding to the first side surface, the second side is a straight side, corresponding to the second side surface, and the angles between the two sides and the base are both acute angles.

5. The longitudinal vortex generator for a UV reactor according to claim 1, characterized in that: The longitudinal vortex generating plates are arranged in pairs on the bottom plate, and the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged adjacently and spaced apart or symmetrically.

6. The longitudinal vortex generator for an ultraviolet reactor according to claim 5, characterized in that: When the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged symmetrically, the two longitudinal vortex generating plates are centrally symmetrical on the bottom plate, and each pair of longitudinal vortex generating plates are evenly distributed on the bottom plate; when the two longitudinal vortex generating plates in each pair of longitudinal vortex generating plates are arranged adjacently and spaced apart, the two longitudinal vortex generating plates are axially symmetrical on the bottom plate, and each pair of longitudinal vortex generating plates are evenly distributed on the bottom plate.

7. The longitudinal vortex generator for a UV reactor according to claim 1, characterized in that: The longitudinal vortex generator is made of metal, polytetrafluoroethylene or light-transmitting quartz material.

8. A compact ultraviolet reactor using the longitudinal vortex generator according to any one of claims 1 to 7, characterized in that: The invention comprises at least one ultraviolet radiation light 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 the longitudinal vortex reactor; the inlet (202), the inlet component (204), the reactor cavity (206), the outlet component (205), and the outlet (203) are sequentially connected, the inlet component (204) and the outlet component (205) are respectively arranged at two ends of the reactor cavity (206), and the longitudinal vortex reactor, the light-transmitting quartz tube (207), and the ultraviolet radiation light source (201) are sequentially coaxially arranged from outside to inside in a radial direction. The compact ultraviolet reactor is arranged inside the reactor cavity (206); the two ends of the reactor cavity (206) are respectively connected to the inlet component (204) and the outlet component (205); the longitudinal vortex reactor is connected to the inner wall of the reactor cavity (206); the two ends of the light-transmitting quartz tube (207) and the ultraviolet radiation light source (201) are respectively connected to the inlet component (204) and the outlet component (205); 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); and the annular flow channel between the reactor cavity (206) and the light-transmitting quartz tube (207) forms a reaction zone.

9. The compact UV reactor according to claim 7, characterized in that: The ultraviolet radiation light source (201) is a low-pressure mercury lamp, a medium-pressure mercury lamp, an 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 inlet component (204), the reactor cavity (206) and the outlet component (205) are all made of metal materials.

10. The compact UV reactor according to claim 7, characterized in that: On the same longitudinal vortex reactor, the flow angles of the longitudinal vortex generating plates are the same.

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