A UV oxidation reactor and optimization method thereof

Abstract

The invention discloses an ultraviolet oxidation reactor and an optimization method thereof. The reactor comprises: a reaction chamber, two ends of which are respectively a fluid inlet and a fluid outlet; a plurality of baffles, which are installed in the reaction chamber at a preset interval along the axial direction of the reaction chamber; wherein the baffle is a spiral linear annular body with a notch, and a hole for a ultraviolet lamp to pass through is opened on the baffle; two adjacent baffles are positioned and installed in a manner that the notches are staggered at a preset angle; the ultraviolet lamp is installed in the reaction chamber through the holes of the plurality of baffles, and the axial direction of the ultraviolet lamp is parallel to the axial direction of the reaction chamber; and a plurality of mirror fins, which are installed on the inner wall of the reaction chamber and form a preset angle with the inner wall of the reaction chamber, so as to increase disturbance of the fluid on the surface of the inner wall of the reaction chamber, reduce laminar flow, and reflect ultraviolet light. The optimization method includes: simulating the fluid characteristics in the reaction chamber under different working conditions through fluid dynamics simulation, observing the streamlines in the reaction chamber, calculating fluid dynamics parameters, and adjusting the spiral characteristics, quantity, and spacing of the baffle; the working conditions include inlet flow rate, ultraviolet lamp power, and baffle gap size; calculating the average ultraviolet dose and ultraviolet uniformity parameters of the simulated fluid outlet under different working conditions through fluid dynamics simulation, and ensuring suitable working conditions and reactor design parameters according to the average ultraviolet dose and the size of the ultraviolet uniformity parameters.

Description

Technical Field

[0001] The invention relates to an ultraviolet oxidation reactor and an optimization method thereof, belonging to the technical field of water treatment. Background Art

[0002] Low-pressure mercury lamps are common ultraviolet light sources. The mercury vapor in the low-pressure mercury lamp can stimulate ultraviolet rays with wavelengths of 254nm and 185nm under the collision of high-energy electrons. Traditional low-pressure mercury lamps use ordinary quartz glass tube walls, which only transmit and emit 254nm ultraviolet rays; while dual-wavelength low-pressure mercury lamps use high-transparency quartz tube walls, which can transmit dual-wavelength ultraviolet rays of 254nm and 185nm.

[0003] However, due to the limited propagation distance of 185nm ultraviolet rays in water, the dual-wavelength low-pressure mercury lamp reactor causes oxidation to be concentrated in the area close to the ultraviolet lamp, while the oxidation performance in the area far from the lamp is insufficient. Therefore, this reactor has long faced the problems of uneven ultraviolet irradiation dose distribution, low disinfection and oxidation efficiency. When dual-wavelength low-pressure mercury lamps are used for advanced oxidation water treatment, 185nm ultraviolet rays split water molecules to generate active free radicals. However, since pollutants are degraded in the area near the lamp, high concentrations of pollutants still remain in the area far from the lamp due to insufficient oxidation performance.

[0004] Figure 1 The figure shows the propagation and radiation of ultraviolet light in water in the reactor demonstrated by the computational fluid dynamics (CFD) research. (a) shows the light field distribution of 185nm wavelength ultraviolet light in water, and (b) shows the light field distribution of 254nm wavelength ultraviolet light in water. The darker the color, the stronger the ultraviolet radiation. Due to the design of the lamp tube, there is a dead zone for illumination. In the actual operation of the traditional UV reactor, the flow rate is not too fast, making the overall flow laminar and some fluids unevenly illuminated, resulting in a high concentration of pollutants remaining at the outlet. Summary of the invention

[0005] In view of this, the present invention proposes an ultraviolet oxidation reactor with a specially shaped baffle and an optimization method thereof to solve the technical problems of uneven spatial distribution of disinfection and oxidation performance and low disinfection and oxidation efficiency caused by attenuation of ultraviolet rays in the water layer in the existing ultraviolet reactor.

[0006] In order to solve the above technical problems, one aspect of the present invention proposes the following technical solutions:

[0007] A UV oxidation reactor comprises: a reaction chamber, two ends of which are respectively a fluid inlet and a fluid outlet; a plurality of baffles installed in the reaction chamber at a preset interval along the axial direction of the reaction chamber; wherein the baffle is a spiral ring body with a notch, and a hole for a UV lamp to pass through is opened on the baffle; two adjacent baffles are positioned and installed in a manner that the notches are staggered at a predetermined angle; a UV lamp is installed in the reaction chamber through the holes of the plurality of baffles, and the axial direction of the UV lamp is parallel to the axial direction of the reaction chamber; and a plurality of mirror fins are installed on the inner wall of the reaction chamber, forming a predetermined angle with the inner wall of the reaction chamber, so as to increase disturbance of the fluid on the surface of the inner wall of the reaction chamber, reduce laminar flow, and reflect UV light.

[0008] Furthermore, the size of the notch of the baffle is 20% to 90% of the circumference.

[0009] Furthermore, the pitch of the spiral circular ring body is 20 to 60 mm.

[0010] Furthermore, the preset spacing is 10% to 50% of the length of the reaction chamber.

[0011] Furthermore, it also includes a tie rod fixed to the inner wall of the reaction chamber and a distance tube fixed on the tie rod; the multiple baffles are fixed by the tie rod and spaced by the distance tube so as to be installed according to the preset spacing.

[0012] Furthermore, the fin is in the shape of a sheet with an arc, and one side of the fin is a beveled edge, and the installation at the predetermined angle is achieved by connecting and fixing the beveled edge to the inner wall of the reaction chamber.

[0013] Furthermore, the predetermined angle is 5 to 30 degrees.

[0014] Furthermore, the plurality of ultraviolet lamp tubes are installed at a spacing of 20 to 60 mm.

[0015] According to another aspect of the present invention, an optimization method for the aforementioned ultraviolet oxidation reactor is also proposed, comprising: simulating the fluid characteristics in the reaction chamber under different operating conditions through fluid mechanics simulation, observing the streamlines in the reaction chamber, calculating fluid mechanics parameters, and adjusting the spiral characteristics, number and spacing of the baffle; wherein the operating conditions include inlet flow rate, ultraviolet lamp power and baffle gap size; calculating the average ultraviolet dose and ultraviolet uniformity parameters of the simulated fluid outlet under different operating conditions through fluid mechanics simulation, and ensuring suitable operating conditions and reactor design parameters according to the average ultraviolet dose and the size of the ultraviolet uniformity parameters.

[0016] Furthermore, the average ultraviolet dose is the ultraviolet dose obtained by simulating the DPM discrete phase model.

[0017] The beneficial effects of the technical solution of the present invention are embodied in the following aspects: the ultraviolet oxidation reactor of the present invention, by specially designing the shape of the baffle in the reaction chamber, designs the baffle into a circular ring with a notch and a spiral shape, can create turbulence at a low flow rate, realize an operation method in which the flow state in the reactor is evenly mixed, and improve the uniformity of light received by the water body. At the same time, by installing fins on the inner wall of the reaction chamber, the fluid is disturbed more on the surface of the pipe wall and the laminar flow is reduced; at the same time, the mirror fins can reflect ultraviolet rays, reduce wall absorption, and enhance the ultraviolet radiation of the reaction chamber. Thereby solving the technical problems of uneven spatial distribution of disinfection and oxidation performance and low disinfection and oxidation efficiency caused by the attenuation of ultraviolet rays in the water layer, improving the efficiency of ultraviolet oxidation treatment, and improving the sewage treatment effect.

[0018] On the other hand, the optimization method of the present invention can effectively evaluate the performance of the reactor under different designs and operating conditions. Under the same floor space, by adding baffles with specially designed shapes, the residence time of the fluid in the reactor is increased, thereby improving the water treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the range of light propagation in water of different wavelengths of dual-wavelength UV reactor lamps simulated by CFD.

[0020] Figure 2 It is a front view of the ultraviolet oxidation reactor according to an embodiment of the present invention.

[0021] Figure 3 It is a left side view of the ultraviolet oxidation reactor according to an embodiment of the present invention.

[0022] Figure 4 Schematic diagram of an exemplary shape of a baffle in an embodiment of the present invention.

[0023] Figure 5 This is an exemplary method of fixing the baffle and the railing in the embodiment of the present invention.

[0024] Figure 6 This is an exemplary arrangement of the ultraviolet lamp tubes in the embodiment of the present invention.

[0025] Figure 7 It is a three-dimensional flow distribution diagram inside the reaction chamber of the embodiment of the present invention when no baffle is added.

[0026] Figure 8 It is a three-dimensional flow distribution diagram inside the reaction chamber after adding baffles in the embodiment of the present invention.

[0027] Fig. 9 It is a flow chart of the reactor optimization method according to an embodiment of the present invention.

[0028] Figure 10-1 to Figure 10-4Schematic diagram of the fin structure of an embodiment of the present invention.

[0029] Explanation of the reference numerals: 1. saddle; 2. vent valve; 3. flat head assembly; 4. ultraviolet lamp; 5. distance tube / pull rod; 6. bolt; 7. fluid inlet flange; 8. gasket; 9. pressure relief valve; 10. fluid outlet flange; 11. electronic control device; 12. centralized ballast; 13. reaction chamber; 14. baffle; 15. fin. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods and examples. It should be understood that the purpose of providing the examples is only to illustrate and illustrate, and not to limit the scope of protection of the present invention.

[0031] Please refer to Figure 2 The embodiment of the present invention provides an ultraviolet oxidation reactor, comprising: a reaction chamber 13, two ends of which are respectively a fluid inlet and a fluid outlet; a plurality of baffles 14, which are installed in the reaction chamber at a preset interval along the axial direction of the reaction chamber; wherein the baffle 14 is a spiral ring body with a notch, and a hole for the ultraviolet lamp to pass through is opened on the baffle; two adjacent baffles are positioned and installed in a manner that the notches are staggered at a predetermined angle; an ultraviolet lamp 4, which is installed in the reaction chamber through the holes of the plurality of baffles, and the axial direction of the ultraviolet lamp is parallel to the axial direction of the reaction chamber; and a plurality of mirror fins 15, which are installed on the inner wall of the reaction chamber 13 and form a predetermined angle with the inner wall of the reaction chamber, so as to increase disturbance of the fluid on the inner wall surface of the reaction chamber, reduce laminar flow, and reflect ultraviolet light.

[0032] Continue to refer Figure 2 In some embodiments, a saddle 1 is welded to the bottom of the outside of the reaction chamber 13, and the saddle 1 is fixed to the ground by bolts. It can be understood that the saddle 1 is a base that supports and fixes the entire reactor. The number of saddles 1 is preferably 2, and can also be other numbers, and the present invention is not limited to this.

[0033] Continue to refer Figure 2 In some embodiments, a vent valve 2 is also provided at the bottom of the reaction chamber 13. Figure 2 As shown, the vent valve 2 may be located near the fluid inlet side, and is used to vent the fluid in the reaction chamber in some situations such as when maintenance is required.

[0034] Continue to refer Figure 2 In some embodiments, a flat head assembly 3 is used at both ends of the reaction chamber 13, and the flat head assembly 3 has a detachable head cover, bolts 6 and gaskets for disassembly and maintenance. Figure 3 As shown, Figure 3It is a left view of the reactor when the baffle is not installed. The flat head assembly 3 has a plurality of holes for the ultraviolet lamp 4 to pass through, and the inside of the hole has a water-sealing gasket. The ultraviolet lamp 4 preferably adopts a low-pressure mercury lamp, which can emit ultraviolet light of multiple wavelengths. The wall of the ultraviolet lamp is made of highly transparent quartz glass, and the lamp is also covered with a highly transparent quartz glass sleeve. Nitrogen is filled between the wall of the lamp and the sleeve. In the preferred embodiment, multiple ultraviolet lamps should be arranged relatively evenly on the cross section of the reaction chamber, such as Figure 6 As shown, in the embodiment with three lamp tubes, the cross-sectional center points of the three lamp tubes are connected to form an equilateral triangle, and such an arrangement is conducive to improving the uniformity of ultraviolet light covering the water body. Other numbers of lamp tubes can also be arranged and designed according to the same idea, and the present invention does not limit the number of lamp tubes.

[0035] refer to Figure 2 and Figure 3 In some embodiments, the baffle 14 can be positioned and installed by a tie rod and a distance tube. Specifically, Figure 5 The tie rod 5 and the distance tube 51 are fixed to the head cover of the flat head assembly 3 by expansion connection. The distance tube 51 is sleeved on the tie rod 5. The distance between the distance tubes 51 is the distance between the baffles. The baffles are fixed by the tie rod 5 and positioned by the distance tube 51. In this embodiment, the shape of the baffle is a spiral ring with a notch, such as Figure 4 As shown, we can understand the spiral torus with a gap through an exemplary formation process: first, a plane-type (i.e., the upper torus is a plane, and the lower torus is also a plane) ordinary torus, secondly, the ordinary torus has a gap, and the gap occupies about 25% of the circumference, and finally, two external forces in different directions are applied to the ordinary torus with a gap, so that the torus with a gap (originally a plane) becomes a spiral inclined surface, and finally the spiral torus with a gap is obtained. In some embodiments, the pitch of the spiral torus is about 20 to 60 mm, preferably about 40 mm. In addition, the size of the gap can also be about 20% of the circumference, or even 90% of the circumference, or any value between 20% and 90% of the circumference. The installation spacing between the baffles in the reaction chamber is determined according to the length of the reaction chamber and the number of baffles, and the installation spacing between two adjacent baffles can be 10% to 50% of the length of the reaction chamber.

[0036] The baffle of the ultraviolet oxidation reactor provided by the embodiment of the present invention can create turbulence at a low flow rate, realize an operation method of uniformly mixing the flow state in the reactor, eliminate the dead zone of the light field, and improve the uniformity of light reception of the water body. Figure 7The three-dimensional flow distribution diagram of the reactor without baffles is presented, highlighting the flow conditions inside the reactor without baffles. The lines reflect the movement trajectory of the fluid, and the color of the lines indicates the radial velocity of the fluid. The darker the line, the higher the radial velocity of the fluid. Figure 8 The three-dimensional flow distribution diagram of the reactor after adding baffles is depicted, showing how the baffles improve the flow distribution in the reactor and improve the uniform mixing of the fluid. The bars reflect the movement trajectory of the fluid, and the line color indicates the radial velocity of the fluid. The darker the line, the higher the radial velocity of the fluid.

[0037] refer to Figure 2 The fluid inlet and fluid outlet of the reaction chamber 13 are connected to the matching fluid inlet flange 7 and fluid outlet flange 10 by bolts, respectively, and the fluid inlet flange 7 has a gasket 8. In addition, a pressure relief valve 9 is installed at the top of the reaction chamber, near the fluid outlet flange 10. When the outlet pressure is too high, the pressure relief valve will automatically pop open to release the pressure to prevent the danger caused by excessive pressure. The electric control device 11 of the reactor is arranged between the fluid outlet flange 10 and the flat head assembly on the outlet side; the central line ballast 12 is located on one side of the flat head assembly, and is internally connected to the two poles of the ultraviolet lamp. The central line ballast 12 has the function of protecting the wires and preventing water from short-circuiting. The central line ballast 12 is connected to the electric control device 11 through waterproof wires. The electric control device includes a relay, a leakage fuse and a main switch to ensure the safe and stable operation of the system.

[0038] like Figure 10-1 to Figure 10-4 FIG. 1 is a schematic diagram of an exemplary shape of a fin in an embodiment of the present invention, wherein Figure 10-1 The fin stereogram is shown below. Figure 10-2 is the front view of the fin, Figure 10-3 This is the right side view of the fin. Figure 10-4 It can be seen that the fin 15 is a sheet with a slight curvature, and one side edge 151 of the fin is a beveled edge, and the installation of the predetermined angle is achieved by connecting and fixing the beveled edge to the inner wall of the reaction chamber, as shown in FIG. Figure 2 As shown, the predetermined angle between the fin 15 and the inner wall of the reaction chamber is about 5 to 30 degrees, preferably about 10 degrees. The number of fins can be multiple, preferably installed in the reaction chamber at a position approximately in the middle between the two baffles, and preferably evenly distributed in the circumference of the reaction chamber, for example Figure 3 As shown in FIG. 1 , there are 8 fins 15 , and the connecting lines between the fins in the circumferential direction can form an octagon; of course, other numbers of fins are also possible, and the present invention is not limited to this.

[0039] Another embodiment of the present invention also proposes an optimization method for the aforementioned ultraviolet oxidation reactor, which mainly selects the optimal reactor design parameters through fluid mechanics simulation and calculation of the average ultraviolet dose and uniformity parameters at the fluid outlet to ensure that the light field in the reactor uniformly covers the water body. The reactor and optimization method in the embodiment of the present invention can be widely used in water treatment and other fields to improve ultraviolet reaction efficiency and reduce energy consumption, and have good practical application value. The optimization method of the embodiment of the present invention specifically includes: through fluid mechanics simulation, simulating the fluid characteristics in the reaction chamber under different working conditions, observing the streamlines in the reaction chamber, calculating the fluid mechanics parameters, and adjusting the spiral characteristics (such as pitch), quantity, and spacing of the baffle; wherein the working conditions include inlet flow rate, ultraviolet lamp power, and baffle notch size; through fluid mechanics simulation, calculating the average ultraviolet dose and ultraviolet uniformity parameters of the simulated fluid outlet under different working conditions, according to the average ultraviolet dose and the size of the ultraviolet uniformity parameters, ensuring appropriate working conditions and reactor design parameters. Among them, the CFD simulation adopts the DPM discrete phase model for simulation, and the average ultraviolet dose is the ultraviolet dose obtained by the DPM discrete phase model simulation, which can be specifically the slope of the line connecting the 10th percentile and the 90th percentile of the particle ultraviolet dose particle cumulative distribution function diagram.

[0040] The optimization method of the embodiment of the present invention sets different design conditions (baffle spacing, baffle notch size, reaction chamber diameter, etc.) when establishing the model, and calculates the average ultraviolet dose at the fluid outlet through fluid mechanics simulation. By optimizing the combination of different design conditions, the design with the best average ultraviolet dose of the outlet fluid is selected.

[0041] refer to Fig. 9 , the specific process of the optimization method includes:

[0042] 1. According to the physical reactor, the reactor model is constructed in the computer. The diameters of the UV lamp sleeves are designed to be 23mm, 21mm, and 19mm respectively;

[0043] 2. Grid the reactor model with a grid density of less than 5 cm, and encrypt the grids of the lamp tube and the inner wall of the reaction chamber;

[0044] 3. Open the fluid simulation model (double k model), open the energy equation, and set the DO radiation model; when setting the DO model, you need to set the grayscale model and select the dual wavelengths of 185nm and 254nm;

[0045] 4. Set the fluid property to water, and the fluid's absorption rate for 185nm ultraviolet light is 180nm. -1 The absorption rate of ultraviolet light at 254nm wavelength is 0.055646m-1 ;

[0046] 5. Set the number of particles to be added and the initial boundary conditions;

[0047] 6. Set the inlet flow rate to

[0048]

[0049] 7. Start calculation until the model converges;

[0050] 8. Enter the particle flow export interface and export the .xy file, with the horizontal axis being time and the vertical axis being 185nm ultraviolet radiation and 254nm ultraviolet radiation.

[0051] 9. The particle DO radiation value is read and analyzed by matlab, and the particle UV dose is calculated. The value of the UV dose 10th percentile is used to characterize the reactor design optimization effect. A special parameter Koc is designed as the degree of fluid turbulence in the reactor and the uniformity of fluid radiation. Koc is calculated as the slope of the line connecting the 10th percentile and the 90th percentile of the particle UV dose particle cumulative distribution function diagram.

[0052] 10. Enter cfd-post and observe the flow vector of the fluid mechanics simulation results to display the operation of an embodiment. According to the results, optimize the working conditions (including but not limited to the baffle spacing, baffle pitch, positioning angle between baffles, reaction chamber diameter, etc.), and select the optimal working condition. Finally, select the working condition with an inlet flow rate of 0.465m / s and a UV lamp sleeve of 23mm.

[0053] The present invention also provides the following exemplary reactor:

[0054] A UV oxidation reactor, wherein the reaction chamber is cylindrical, the cavity is 850 mm long and the cavity diameter is 102.6 mm; flange welding is adopted at both ends of the cavity, the flange width is 175 mm, the flange has 8 bolt holes, and the centers of the bolt holes are evenly distributed at a diameter of 160 mm; the fluid inlet and the fluid outlet are both cylindrical with a width of 55 mm and a wall thickness of 4 mm; the distance between the centers of the fluid inlet and the fluid outlet and the nearest head cover is 105 mm; the fluid inlet and the fluid outlet are both perpendicular to the UV lamp; the inlet water flows in through the tangential direction of the reactor cross section, and the outlet water flows out from the end of the reactor along the tangential direction; the fluid inlet and the fluid outlet are located directly above the cavity; the saddle is located directly below the cavity, the saddle and the cavity are welded, and the saddle is 190 mm away from both ends of the cavity; the flat head assembly has holes of a predetermined size for the UV lamp to pass through, and the centers of the holes are arranged in an equilateral triangle, such as Figure 6, the distance is 34.2mm, the hole is equipped with a water-sealing gasket, and both ends of the UV lamp are fixed in the hole; the diameter of the UV lamp sleeve is 23mm; multiple groups of UV lamps are installed in the reaction chamber, and amalgam alloy is used as the mercury source, and vacuum treatment is used to ensure efficient operation. Figure 6 The lamp tubes should be arranged in an equilateral triangle, and the center distance between the multiple lamp tubes is about 34.2mm; the spacing of the fixed-distance tubes is the baffle spacing, the inner diameter of the fixed-distance tube is 6mm, and the pull rod is a steel pipe with a diameter of 4mm; the pull rod is welded to the flat head assembly, and the first baffle is 180mm away from the flat head assembly; the outer diameter of the baffle is 90mm, and the diameter of the hole opened on the baffle is about 26mm. The baffle of this example is spiral-shaped with a pitch of 40mm, and the baffle notch angle is about 25%; the notch direction of the first baffle is downward, the baffles are positioned at 90 degrees, and the baffle spacing is 120mm; the fin length is 40mm, and it is welded and fixed at an angle of 10 degrees to the inner wall of the reaction chamber. In this example, there are 8 fins, and the front and rear spacing of the fins is 200mm.

[0055] It should be noted that the reactor with the above specific parameter designs is only used as an example, and does not mean that the reaction of the present invention can only have the above parameter designs.

[0056] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art of the present invention, several equivalent substitutions or obvious variations can be made without departing from the concept of the present invention, and the performance or use is the same, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. An ultraviolet oxidation reactor, characterized in that: include: A reaction chamber, two ends of which are respectively a fluid inlet and a fluid outlet; A plurality of baffles are installed in the reaction chamber at a preset interval along the axial direction of the reaction chamber; wherein the baffle is a spiral ring body with a notch, which can create turbulence at a low flow rate, and a hole for the ultraviolet lamp to pass through is opened on the baffle; two adjacent baffles are positioned and installed in a manner that the notch is staggered at a predetermined angle; the pitch of the spiral ring body is 20 to 60 mm; An ultraviolet lamp tube is installed in the reaction chamber through the holes of the plurality of baffles, and the axial direction of the ultraviolet lamp tube is parallel to the axial direction of the reaction chamber; as well as A plurality of mirror fins are installed on the inner wall of the reaction chamber and form a predetermined angle with the inner wall of the reaction chamber to increase disturbance of the fluid on the surface of the inner wall of the reaction chamber, reduce laminar flow, and reflect ultraviolet light.

2. The ultraviolet oxidation reactor according to claim 1, characterized in that: The size of the notch of the baffle is 20% to 90% of the circumference.

3. The ultraviolet oxidation reactor according to claim 1, characterized in that: The preset spacing is 10% to 50% of the length of the reaction chamber.

4. The ultraviolet oxidation reactor according to claim 1, characterized in that: It also includes a tie rod fixed to the inner wall of the reaction chamber and a distance tube fixed to the tie rod; the multiple baffles are fixed by the tie rod and spaced by the distance tube so as to be installed according to the preset spacing.

5. The ultraviolet oxidation reactor according to claim 1, characterized in that: The fin is in the shape of a sheet with an arc, and one side of the fin is a beveled edge, and the installation at the predetermined angle is achieved by connecting and fixing the beveled edge to the inner wall of the reaction chamber.

6. The ultraviolet oxidation reactor according to claim 5, characterized in that: The predetermined angle is 5 to 30 degrees.

7. The ultraviolet oxidation reactor according to claim 1, characterized in that: The plurality of ultraviolet lamp tubes are installed at a spacing of 20 to 60 mm.

8. The method for optimizing the ultraviolet oxidation reactor according to any one of claims 1 to 7, characterized in that: include: By means of fluid dynamics simulation, the fluid characteristics in the reaction chamber under different working conditions are simulated, and the streamlines in the reaction chamber are observed, and the fluid dynamics parameters are calculated, and the spiral characteristics, quantity and spacing of the baffles are adjusted; wherein the working conditions include the inlet flow rate, the power of the ultraviolet lamp tube and the size of the baffle notch; Through fluid dynamics simulation, the average UV dose and UV uniformity parameters of the simulated fluid outlet under different operating conditions are calculated, and appropriate operating conditions and reactor design parameters are ensured based on the average UV dose and the size of the UV uniformity parameters.

9. The method for optimizing the ultraviolet oxidation reactor according to claim 8, characterized in that: The average ultraviolet dose is the ultraviolet dose obtained by simulation of the DPM discrete phase model.

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