Photocatalytic reaction system based on sewage treatment

Abstract

The invention discloses a photocatalytic reaction system based on sewage treatment, and relates to the technical field of sewage treatment. A first flow guide assembly is installed at the bottom of a first reaction cylinder, a light source assembly sleeves the first reaction cylinder, a flow mixing assembly is installed in the first reaction cylinder, a second flow guide assembly is installed at the bottom of a second reaction cylinder, a light source assembly sleeves the second reaction cylinder, and a flow mixing assembly is installed in the second reaction cylinder. The first flow guide assembly is in one-way communication with the second flow guide assembly at the rear end of the first flow guide assembly, the second flow guide assembly is in one-way communication with the second flow guide assembly at the rear end of the second flow guide assembly, and a pressurized water air supply pipe is arranged above the spiral time delay piece. A water through hole communicated with the flow guide cavity is formed in the catalyst storage part. By arranging a plurality of reaction cylinders which are connected in series front and back, a multi-stage photocatalytic reaction process on a series line is realized, and the photocatalytic treatment effect of sewage is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and particularly relates to a photocatalytic reaction system based on sewage treatment. Background Art

[0002] The photocatalytic water treatment technology is based on highly active free radicals generated by photocatalysts under light irradiation. These free radicals have a strong oxidation ability and can effectively decompose organic pollutants and some inorganic pollutants in water to achieve water purification. Titanium dioxide is one of many solid photocatalysts and has been widely used in the water treatment field due to its excellent photocatalytic activity, chemical stability, non-toxicity, and low cost.

[0003] The application form of the photocatalyst has a direct impact on its performance and application effect. Currently, it mainly includes suspended photocatalysts, immobilized photocatalysts, and photocatalytic membranes. The physical properties of the entire photocatalyst depend on the physical properties of the catalyst carrier used. To improve the control effect of the catalyst during the catalytic reaction process, solid particles in the shape of a floating ball can be selected as the catalyst carrier to prepare the photocatalyst.

[0004] In the existing photocatalytic reaction device, the solid catalyst is generally directly placed in the sewage, and the photocatalytic reaction is realized through continuous stirring. During the process of completing the photocatalytic reaction and continuing to feed water, it is easy for the solid catalyst in the reaction system to flow out with the sewage, resulting in the loss of the catalyst in the reaction system and affecting the photocatalytic reaction effect of the subsequent sewage. Therefore, we provide a photocatalytic reaction system based on sewage treatment to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a photocatalytic reaction system based on sewage treatment. Through the specific structural design of the reaction bearing assembly, the first reaction mechanism, the second reaction mechanism, the water supply main pipe, the drainage main pipe, and the air supply main pipe, the problem that in the existing photocatalytic reaction device, during the process of completing the photocatalytic reaction and continuing to feed water, it is easy for the solid catalyst in the reaction system to flow out with the sewage, resulting in the loss of the catalyst in the reaction system and affecting the photocatalytic reaction effect of the subsequent sewage is solved.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions: The present invention is a photocatalytic reaction system based on sewage treatment, including a photocatalytic reaction module; the photocatalytic reaction module includes a reaction bearing assembly, and a first reaction mechanism and a second reaction mechanism are installed inside the reaction bearing assembly; wherein, the first reaction mechanism includes a first reaction cylinder, a first diversion assembly is installed at the bottom of the first reaction cylinder, a light source assembly is sleeved outside the first reaction cylinder, and a mixing assembly is installed inside the first reaction cylinder; the second reaction mechanism includes a second reaction cylinder, a second diversion assembly is installed at the bottom of the second reaction cylinder, a light source assembly is sleeved outside the second reaction cylinder, and a mixing assembly is installed inside the second reaction cylinder. The first diversion assembly is unidirectionally communicated with the second diversion assembly at its rear end, and the second diversion assembly is unidirectionally communicated with the second diversion assembly at its rear end; the mixing assembly includes a rotatably arranged spiral delay sheet, a water pressure supply pipe is arranged above the spiral delay sheet, and the water inlet end of the first reaction cylinder is arranged at its top; both the first diversion assembly and the second diversion assembly include a diversion box, a catalyst storage part is fixedly installed inside the diversion box, a diversion cavity is arranged between the catalyst storage part and the diversion box, and water passing holes communicating with the diversion cavity are uniformly opened on the catalyst storage part; the water pressure supply pipe at the first reaction cylinder is used to press the sewage therein into the second reaction cylinder at the rear end, and the water pressure supply pipe at the second reaction cylinder is used to press the sewage therein into the second reaction cylinder at the rear end.

[0007] In some embodiments, the reaction bearing assembly includes a bearing base, two vertical bearing frames are symmetrically installed at the top of the bearing base, a first support frame and a second support frame are respectively installed between the vertical bearing frames, a plurality of cylinder positioning grooves are arranged at the top of the first support frame, and U-shaped mounting seats corresponding to the cylinder positioning grooves one by one are fixedly arranged at the top of the second support frame; a water supply connecting pipe is installed on the vertical bearing frame close to the first reaction mechanism side, a drainage connecting pipe and a gas supply connecting pipe are installed on the vertical bearing frame far from the first reaction mechanism side, both the water supply connecting pipe and the gas supply connecting pipe are located at the top of the vertical bearing frame, the drainage connecting pipe is located at the bottom of the vertical bearing frame, and a horizontal air guide pipe for plugging and matching with the gas supply connecting pipe is installed at the bottom of the second support frame.

[0008] In some embodiments, a support cover coaxial with the diversion box is arranged above the diversion box, the support cover and the diversion box are connected by a fixing plate, the catalyst storage part is composed of a diversion hopper and a conical storage ring, the diversion hopper is concentrically fixed at the top of the conical storage ring, the top of the diversion hopper and the bottom of the conical storage ring are both fixed on the inner wall of the diversion box, and the water passing holes are uniformly opened on the circumferential side surface of the diversion hopper.

[0009] In some embodiments, an outlet connection pipe communicating with the diversion cavity is installed on the circumferential side surface of the diversion box. A first solenoid valve is installed on the outlet connection pipe. An inlet connection pipe communicating with the diversion cavity is installed on the circumferential side surface of the diversion box of the second diversion assembly. A one-way valve is installed on the inlet connection pipe. The outlet connection pipe of the first diversion assembly and the inlet connection pipe at its rear end are connected by a flange. The outlet connection pipe of the second diversion assembly and the inlet connection pipe at its rear end are connected by a flange. The drain connection pipe and the outlet connection pipe at its front end are connected by a flange.

[0010] In some embodiments, sealing grooves are formed at the bottoms of the first reaction cylinder and the second reaction cylinder. A sealing ring adapted to the sealing grooves is fixedly installed at the top of the diversion box. The bottoms of the first reaction cylinder and the second reaction cylinder are respectively closely attached to the corresponding top of the diversion box. The diversion box is installed inside the cylinder positioning groove. Air release pipes are installed at positions near the tops of the circumferential side surfaces of the first reaction cylinder and the second reaction cylinder. A second solenoid valve is installed on the air release pipe. A water delivery pipe is installed at a position near the top of the circumferential side surface of the first reaction cylinder. A third solenoid valve is installed on the water delivery pipe. The water delivery pipe and the water supply connection pipe are in plug-in fit.

[0011] In some embodiments, the light source assembly includes a light source installation cylinder supported inside the support cover. A plurality of ultraviolet lamp tubes are circumferentially and arrayedly arranged on the inner wall of the light source installation cylinder. The first reaction cylinder and the second reaction cylinder are respectively sleeved inside the corresponding support cover.

[0012] In some embodiments, the mixing component further includes a top sealing cover. A top sealing cover is installed on the top of each of the first reaction cylinder and the second reaction cylinder. A mixing motor is installed on the top of the U-shaped mounting seat. The output end of the mixing motor is connected to a mixing shaft rotatably connected to the second support frame. The mixing shaft penetrates through the top sealing cover and the two are rotatably connected. The spiral delay sheet is fixedly installed on the mixing shaft. The water pressure supply pipe is communicated and arranged on the top of the top sealing cover. A fourth solenoid valve is installed on the water pressure supply pipe. The horizontal air guide pipe is communicated and arranged with each of the water pressure supply pipes on one side thereof.

[0013] In some embodiments, the present invention further includes a water supply main pipe, a drain main pipe, and a gas supply main pipe. A plurality of photocatalytic reaction modules are installed between the water supply main pipe and the drain main pipe. The water supply main pipe and each water supply connection pipe are connected by a flange. The drain main pipe and each drain connection pipe are connected by a flange. The gas supply main pipe and each gas supply connection pipe are connected by a flange.

[0014] The present invention has the following beneficial effects: 1. The present invention conveys sewage into the first reaction cylinder through a water supply connecting pipe and a water delivery pipe. After flowing downward from the first reaction cylinder into the corresponding diversion box, it enters the diversion cavity through a water passing hole. Under the action of air pressure, it enters the diversion cavity on the adjacent right diversion box through the water outlet connecting pipe below the first reaction cylinder and the water inlet connecting pipe at the corresponding position. Subsequently, the sewage in the diversion cavity below the second reaction cylinder enters the inside of the diversion hopper along the water passing hole, and then gradually flows upward into the corresponding second reaction cylinder from the diversion hopper. As a result, the floating spherical catalyst in the conical storage ring at this position floats with the sewage. The sewage in the second reaction cylinder is fully mixed with the floating spherical catalyst inside it to achieve photocatalytic treatment of sewage. In this way, a multi-stage photocatalytic reaction process on the series route can be realized, improving the photocatalytic treatment effect of sewage.

[0015] 2. The present invention limits the floating spherical catalyst within the middle layer area inside the reaction cylinder by controlling the forward rotation of the spiral delay sheet until the quantitative delivery of sewage in the reaction cylinder is completed. Subsequently, the forward rotation of the spiral delay sheet causes the floating spherical catalyst to agitate within the middle layer area of the reaction cylinder. Thus, under the combined action of ultraviolet light and the floating spherical catalyst, photocatalytic treatment of the sewage in the reaction cylinder is achieved. When the set photocatalytic reaction time is reached, the mixing motor at the position of the reaction cylinder is controlled to close through the control system. At this time, the floating spherical catalyst in the middle layer floats to the water surface again under its own buoyancy. During this process, photocatalytic treatment of sewage is further achieved through the combined action of ultraviolet light and the floating spherical catalyst. During the process of discharging pressurized sewage, photocatalytic treatment of sewage is also achieved through the combined action of ultraviolet light and the floating spherical catalyst. Thereby, the photocatalytic reaction time in the reaction cylinder is prolonged, achieving the purpose of enhancing the photocatalytic reaction effect of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of the photocatalytic reaction system for sewage treatment in the present invention.

[0018] Figure 2 It is a usage state diagram of the photocatalytic reaction module in the present invention.

[0019] Figure 3 For Figure 2 a structural schematic diagram from another angle.

[0020] Figure 4This is a schematic structural diagram of the reaction bearing assembly in the present invention.

[0021] Figure 5 is Figure 4 side view of the structure.

[0022] Figure 6 This is a schematic structural diagram of the first reaction mechanism in the present invention.

[0023] Figure 7 This is a schematic structural diagram of the second reaction mechanism in the present invention.

[0024] Figure 8 This is a schematic structural diagram of the light source assembly in the present invention.

[0025] Figure 9 This is a schematic structural diagram of the first reaction cylinder in the present invention.

[0026] Figure 10 This is a schematic structural diagram of the second reaction cylinder in the present invention.

[0027] Figure 11 This is a schematic structural diagram of the mixed flow assembly in the present invention.

[0028] Figure 12 This is a cross-sectional view of the structure of the first diversion assembly in the present invention.

[0029] Figure 13 This is a cross-sectional view of the structure of the second diversion assembly in the present invention.

[0030] In the drawings, the list of components represented by each reference numeral is as follows:

[0031] 1 - photocatalytic reaction module, 2 - reaction bearing assembly, 3 - first reaction mechanism, 4 - second reaction mechanism, 5 - first reaction cylinder, 6 - first diversion assembly, 7 - light source assembly, 8 - mixed flow assembly, 9 - second reaction cylinder, 10 - second diversion assembly, 11 - spiral delay sheet, 12 - water pressure supply pipe, 13 - diversion box, 14 - diversion cavity, 15 - water passing hole, 16 - bearing base, 17 - vertical bearing frame, 18 - first support frame, 19 - second support frame, 20 - cylinder positioning groove, 21 - U-shaped mounting seat, 22 - water supply connecting pipe, 23 - drainage connecting pipe, 24 - air supply connecting pipe, 25 - horizontal air duct, 26 - supporting cover, 27 - fixing plate, 28 - diversion hopper, 29 - conical storage ring, 30 - water outlet connecting pipe, 31 - first solenoid valve, 32 - water inlet connecting pipe, 33 - check valve, 34 - sealing ring, 35 - air vent pipe, 36 - second solenoid valve, 37 - water delivery pipe, 38 - third solenoid valve, 39 - light source installation cylinder, 40 - ultraviolet lamp tube, 41 - top sealing cover, 42 - mixed flow motor, 43 - mixed flow shaft, 44 - fourth solenoid valve, 45 - water supply main pipe, 46 - drainage main pipe, 47 - air supply main pipe. Detailed implementation mode

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0033] For the first specific embodiment, please refer to Figures 1-13 , the present invention is a photocatalytic reaction system based on sewage treatment, including a photocatalytic reaction module 1; the photocatalytic reaction module 1 includes a reaction carrier assembly 2, and a first reaction mechanism 3 and a second reaction mechanism 4 are installed inside the reaction carrier assembly 2; among them, the first reaction mechanism 3 includes a first reaction cylinder 5, a first diversion assembly 6 is installed at the bottom of the first reaction cylinder 5, a light source assembly 7 is sleeved outside the first reaction cylinder 5, and a mixing assembly 8 is installed inside the first reaction cylinder 5; the second reaction mechanism 4 includes a second reaction cylinder 9, a second diversion assembly 10 is installed at the bottom of the second reaction cylinder 9, a light source assembly 7 is sleeved outside the second reaction cylinder 9, and a mixing assembly 8 is installed inside the second reaction cylinder 9. The first diversion assembly 6 is unidirectionally communicated with the second diversion assembly 10 at its rear end, and the second diversion assembly 10 is unidirectionally communicated with the second diversion assembly 10 at its rear end.

[0034] The mixing assembly 8 includes a rotatably arranged spiral delay sheet 11, a water pressure supply pipe 12 is arranged above the spiral delay sheet 11, and the water inlet end of the first reaction cylinder 5 is arranged at its top; both the first diversion assembly 6 and the second diversion assembly 10 include a diversion box 13, a catalyst storage part is fixedly installed inside the diversion box 13, a diversion cavity 14 is provided between the catalyst storage part and the diversion box 13, and water passing holes 15 communicating with the diversion cavity 14 are uniformly opened on the catalyst storage part; the water pressure supply pipe 12 at the first reaction cylinder 5 is used to press the sewage therein into the second reaction cylinder 9 at the rear end, and the water pressure supply pipe 12 at the second reaction cylinder 9 is used to press the sewage therein into the second reaction cylinder 9 at the rear end.

[0035] In some embodiments, such as Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the reaction carrier assembly 2 includes a carrier base 16. Two vertical carrier frames 17 are symmetrically installed on the top of the carrier base 16. A first support frame 18 and a second support frame 19 are respectively installed between the vertical carrier frames 17. A plurality of cylinder positioning grooves 20 are arranged on the top of the first support frame 18. A U-shaped mounting seat 21 corresponding to the cylinder positioning grooves 20 one by one is fixedly arranged on the top of the second support frame 19. The structure of the entire reaction carrier assembly 2 is detachable; a water supply connecting pipe 22 is installed on the vertical carrier frame 17 close to the first reaction mechanism 3. Sewage is conveyed to the first reaction cylinder 5 on the first reaction mechanism 3 through the water supply connecting pipe 22. A drainage connecting pipe 23 and an air supply connecting pipe 24 are installed on the vertical carrier frame 17 far from the first reaction mechanism 3. The water flow after multi-stage photocatalytic reaction by the photocatalytic reaction module 1 is discharged through the drainage connecting pipe 23. The water supply connecting pipe 22 and the air supply connecting pipe 24 are both located at the top of the vertical carrier frame 17, and the drainage connecting pipe 23 is located at the bottom of the vertical carrier frame 17. A horizontal air guide pipe 25 for plugging and matching with the air supply connecting pipe 24 is installed at the bottom of the second support frame 19.

[0036] In some embodiments, as Figure 12 and Figure 13 shown, a support cover 26 coaxial with the diversion box 13 is arranged above the diversion box 13. The support cover 26 and the diversion box 13 are connected by a fixing plate 27. The catalyst storage part is composed of a diversion hopper 28 and a conical storage ring 29. The diversion hopper 28 is concentrically fixed on the top of the conical storage ring 29. The top of the diversion hopper 28 and the bottom of the conical storage ring 29 are both fixed on the inner wall of the diversion box 13. Water passing holes 15 are evenly opened on the circumferential side surface of the diversion hopper 28. When a certain amount of floating spherical catalyst is placed inside the conical storage ring 29, conveying sewage into the conical storage ring 29 can make the floating spherical catalyst (the spherical carrier is loaded with catalytic particles, such as loaded with titanium dioxide) float, thereby realizing the catalytic reaction of the floating spherical catalyst in the first reaction cylinder 5 or the second reaction cylinder 9. At the same time, the sewage in the first reaction cylinder 5 or the second reaction cylinder 9 can enter the diversion cavity 14 along the water passing holes 15.

[0037] In some embodiments, as Figure 12 and Figure 13As shown, a water outlet connecting pipe 30 communicating with the diversion cavity 14 is installed on the peripheral side of the diversion box 13. A first electromagnetic valve 31 is installed on the water outlet connecting pipe 30. An inlet connecting pipe 32 communicating with the diversion cavity 14 is installed on the peripheral side of the diversion box 13 of the second diversion assembly 10. A check valve 33 is installed on the inlet connecting pipe 32. The water outlet connecting pipe 30 on the first diversion assembly 6 and the inlet connecting pipe 32 at its rear end are connected by a flange. The water outlet connecting pipe 30 on the second diversion assembly 10 and the inlet connecting pipe 32 at its rear end are connected by a flange. The drain connecting pipe 23 and the water outlet connecting pipe 30 at its front end are connected by a flange. In this way, the flow of sewage between each diversion box 13 can be realized, that is, the flow of sewage between each first reaction cylinder 5 and the second reaction cylinder 9 can be realized. As Figure 2 shown, the setting of each check valve 33 ensures that the sewage can only flow in the direction indicated by the arrow (flowing from left to right).

[0038] In some embodiments, such as Figure 9 and Figure 10 shown, sealing grooves are formed at the bottoms of both the first reaction cylinder 5 and the second reaction cylinder 9. A sealing ring 34 adapted to the sealing groove is fixedly installed at the top of the diversion box 13. The bottoms of the first reaction cylinder 5 and the second reaction cylinder 9 are respectively closely attached to the top of the corresponding diversion box 13. In this way, the airtight connection between the first reaction cylinder 5 or the second reaction cylinder 9 and the corresponding diversion box 13 can be realized to ensure the communication state between the first reaction cylinder 5 and the corresponding diversion box 13, and the communication state between the second reaction cylinder 9 and the corresponding diversion box 13. The diversion box 13 is installed inside the cylinder positioning groove 20. Air vent pipes 35 are installed at positions near the top of the peripheral sides of both the first reaction cylinder 5 and the second reaction cylinder 9. A second electromagnetic valve 36 is installed on the air vent pipe 35. A water delivery pipe 37 is installed at a position near the top of the peripheral side of the first reaction cylinder 5. A third electromagnetic valve 38 is installed on the water delivery pipe 37. The water delivery pipe 37 and the water supply connecting pipe 22 are in plug-in fit. In this way, the sewage can be conveyed along the water supply connecting pipe 22 and the water delivery pipe 37 into the first reaction cylinder 5. After the sewage flows down from the first reaction cylinder 5 into the corresponding diversion box 13, it enters the diversion cavity 14 through the water passing holes 15, and enters the diversion cavity 14 on the adjacent diversion box 13 on the right through the water outlet connecting pipe 30 below the first reaction cylinder 5 and the inlet connecting pipe 32 at the corresponding position. Subsequently, the sewage in the diversion cavity 14 below the second reaction cylinder 9 enters the inside of the diversion hopper 28 along the water passing holes 15, and then gradually flows up into the corresponding second reaction cylinder 9 from the diversion hopper 28. Furthermore, the spherical catalyst in the conical storage ring 29 at this position floats with the sewage. The sewage in the second reaction cylinder 9 is fully mixed with the spherical catalyst in it to realize the photocatalytic treatment of the sewage.

[0039] Specific Embodiment 2, on the basis of Specific Embodiment 1, such as Figure 8As shown, the light source assembly 7 includes a light source mounting cylinder 39 supported inside the supporting cover 26. A number of ultraviolet lamps 40 are circumferentially arrayed on the inner wall of the light source mounting cylinder 39. The first reaction cylinder 5 and the second reaction cylinder 9 are respectively sleeved inside the corresponding supporting cover 26. The installation of the light source mounting cylinder 39 is realized through the supporting cover 26. Both the first reaction cylinder 5 and the second reaction cylinder 9 are made of transparent materials. The ultraviolet lamps 40 are circumferentially arranged on the peripheries of the first reaction cylinder 5 and the second reaction cylinder 9 to ensure that the ultraviolet light generated by the ultraviolet lamps 40 can penetrate into the sewage in the first reaction cylinder 5 and the second reaction cylinder 9. The photocatalytic treatment of the sewage is realized under the combined action of the ultraviolet light and the spherical catalyst.

[0040] In some embodiments, as Figure 2 and Figure 11 shown, the mixing component 8 further includes a top sealing cover 41. A top sealing cover 41 is installed on the top of each of the first reaction cylinder 5 and the second reaction cylinder 9 (the top sealing cover 41 and the first reaction cylinder 5 or the second reaction cylinder 9 can be connected by fasteners to ensure that the top sealing cover 41 does not rotate). A mixing motor 42 is installed on the top of the U-shaped mounting seat 21. The output end of the mixing motor 42 is connected to a mixing shaft 43 rotatably connected to the second support frame 19. The mixing shaft 43 penetrates through the top sealing cover 41 and the two are rotatably connected. The spiral delay piece 11 is fixedly installed on the mixing shaft 43. The water pressure supply pipe 12 is communicatively arranged on the top of the top sealing cover 41. A fourth solenoid valve 44 is installed on the water pressure supply pipe 12. The horizontal air duct 25 is communicatively arranged with each water pressure supply pipe 12 on one side thereof; after the corresponding fourth solenoid valve 44 is controlled to be opened, the gas is conveyed to the corresponding water pressure supply pipe 12 through the air supply connecting pipe 24 and the horizontal air duct 25, and then enters the first reaction cylinder 5 or the second reaction cylinder 9 from the water pressure supply pipe 12. Thus, the sewage in the first reaction cylinder 5 or the second reaction cylinder 9 can be pressurized by air, and the pressurized sewage can be discharged from the first reaction cylinder 5 or the second reaction cylinder 9.

[0041] The third solenoid valve 38 on the water delivery pipe 37 of the first reaction mechanism 3 is controlled to open through the control system, and a certain amount of sewage is conveyed into the interior of the first reaction cylinder 5 through the water supply connection pipe 22 and the water delivery pipe 37. The sewage conveyed into the first reaction cylinder 5 gradually flows downward along the corresponding spiral delay sheet 11. The sewage entering the conical storage ring 29 drives the floating spherical catalyst therein to gradually float upward, causing the floating spherical catalyst in the conical storage ring 29 to float into the first reaction cylinder 5. When the water level inside the first reaction cylinder 5 reaches its middle position, during the sewage conveyance process, the mixing motor 42 at the position of the first reaction cylinder 5 is controlled to start, so that the spiral delay sheet 11 rotates forward to confine the floating spherical catalyst within the middle layer area inside the first reaction cylinder 5, that is, during the water inlet process of the first reaction cylinder 5, the floating spherical catalyst is confined within the middle layer area inside the first reaction cylinder 5 by the forward rotation of the spiral delay sheet 11 and will not continue to float upward as the water volume in the first reaction cylinder 5 increases until the quantitative conveyance of the sewage in the first reaction cylinder 5 is completed. Subsequently, the third solenoid valve 38 on the water delivery pipe 37 is controlled to close (and at the same time, each ultraviolet lamp 40 at the position of the first reaction cylinder 5 is turned on). Through the forward rotation of the spiral delay sheet 11, the floating spherical catalyst is agitated within the middle layer area of the first reaction cylinder 5, and thus, under the combined action of ultraviolet light and the floating spherical catalyst, photocatalytic treatment of the sewage in the first reaction cylinder 5 is achieved. When the set photocatalytic reaction time is reached, the mixing motor 42 at the position of the first reaction cylinder 5 is controlled to close through the control system. At this time, the floating spherical catalyst in the middle layer floats to the water surface again under its own buoyancy force (during this process, further sewage catalytic treatment is achieved through the combined action of ultraviolet light and the floating spherical catalyst).

[0042] Subsequently, the control system is used to control the opening of the fourth solenoid valve 44 and the first solenoid valve 31 at the position of the first reaction cylinder 5. Under the action of the air supply connecting pipe 24, the horizontal air guide pipe 25, and the water pressure supply pipe 12, air is conveyed into the first reaction cylinder 5. The sewage in the first reaction cylinder 5 is pressurized by the air. The pressurized sewage enters the diversion chamber 14 on the next second reaction mechanism 4 along the water outlet connecting pipe 30 and the water inlet connecting pipe 32 (in this process, the sewage catalytic treatment is further realized through the combined action of ultraviolet light and the floating spherical catalyst). The sewage in the diversion chamber 14 enters the inside of the diversion hopper 28 along the water passing holes 15, and then gradually flows upward into the corresponding second reaction cylinder 9 through the diversion hopper 28. As a result, the floating spherical catalyst in the conical storage ring 29 at this position floats with the sewage. When the water level inside the second reaction cylinder 9 reaches its middle position, during the sewage conveying process, the mixing motor 42 at the position of the second reaction cylinder 9 is controlled to be turned on. During the water inlet process inside the second reaction cylinder 9, the floating spherical catalyst is confined in the middle layer area inside the second reaction cylinder 9 by the forward rotation of the spiral delay sheet 11 until all the sewage in the first reaction cylinder 5 is discharged (that is, the sewage that has completed the first-stage photocatalytic treatment in the first reaction cylinder 5 completely flows into the second reaction cylinder 9 at the rear). At this time, the fourth solenoid valve 44 and the first solenoid valve 31 at the position of the first reaction cylinder 5 are controlled to be closed. At the same time, the second solenoid valve 36 on the first reaction cylinder 5 is controlled to be opened. After the pressure inside the first reaction cylinder 5 is relieved through the exhaust pipe 35 at this position, the second solenoid valve 36 on the first reaction cylinder 5 is controlled to be closed, and the floating spherical catalyst in the first reaction cylinder 5 rolls back into the conical storage ring 29 again.

[0043] Subsequently, each ultraviolet lamp tube 40 at the position of the second reaction cylinder 9 is controlled to be turned on. The forward rotation of the spiral delay sheet 11 causes the floating spherical catalyst to stir in the middle layer area of the second reaction cylinder 9. Thus, the photocatalytic treatment of the sewage in the second reaction cylinder 9 is realized through the combined action of ultraviolet light and the floating spherical catalyst. When the set photocatalytic reaction time is reached, the control system is used to control the closing of the mixing motor 42 at the position of the second reaction cylinder 9. At this time, the floating spherical catalyst in the middle layer floats to the water surface again under the action of its own buoyancy (in this process, the sewage catalytic treatment is further realized through the combined action of ultraviolet light and the floating spherical catalyst).

[0044] The fourth solenoid valve 44 and the first solenoid valve 31 at the position of the second reaction cylinder 9 behind the first reaction cylinder 5 are controlled to open through the control system. Under the action of the air supply connecting pipe 24, the horizontal air guide pipe 25 and the water pressure supply pipe 12, air is conveyed into the second reaction cylinder 9. The sewage in the first reaction cylinder 5 is pressurized by the air. The pressurized sewage enters the diversion cavity 14 on the second second reaction mechanism 4 along the water outlet connecting pipe 30 and the water inlet connecting pipe 32 (in this process, the sewage catalytic treatment is further realized through the combined action of ultraviolet light and the spherical catalyst). The sewage in the diversion cavity 14 enters the inside of the diversion hopper 28 along the water passing holes 15, and then gradually flows upward into the third second reaction cylinder 9 (i.e., the last second reaction cylinder 9) from the diversion hopper 28. As a result, the spherical catalyst in the conical storage ring 29 at this position floats up with the sewage. When the water level inside the third second reaction cylinder 9 reaches its middle position, the mixing motor 42 at the position of the third second reaction cylinder 9 is controlled to start during the sewage transportation process. During the water inlet process inside the third second reaction cylinder 9, the spherical catalyst is limited within the middle layer area inside the second reaction cylinder 9 by the forward rotation of the spiral delay piece 11 until all the sewage in the second second reaction cylinder 9 is discharged (i.e., the sewage that has completed the secondary photocatalytic treatment in the second second reaction cylinder 9 completely flows into the second reaction cylinder 9 at the back). At this time, the fourth solenoid valve 44 and the first solenoid valve 31 at the position of the second second reaction cylinder 9 are controlled to close, and at the same time, the second solenoid valve 36 on the second second reaction cylinder 9 is controlled to open. After the pressure inside the second reaction cylinder 9 is relieved through the vent pipe 35 at this position, the second solenoid valve 36 on the second reaction cylinder 9 is controlled to close, and the spherical catalyst in the second reaction cylinder 9 rolls back into the conical storage ring 29 again.

[0045] The photocatalytic reaction process in the last second reaction cylinder 9 is the same as that in the second second reaction cylinder 9. After the sewage completes the tertiary photocatalytic reaction in the last second reaction cylinder 9, it is discharged along the drainage connecting pipe 23 for collection.

[0046] Specific Embodiment Three, on the basis of Specific Embodiment Two, as Figure 1As shown in the figure, the present invention further includes a main water supply pipe 45, a main drainage pipe 46, and a main air supply pipe 47; a plurality of photocatalytic reaction modules 1 are installed between the main water supply pipe 45 and the main drainage pipe 46; the main water supply pipe 45 is flange-connected to each water supply connection pipe 22, the main drainage pipe 46 is flange-connected to each drainage connection pipe 23, and the main air supply pipe 47 is flange-connected to each air supply connection pipe 24; in this embodiment, the photocatalytic reaction control process in each photocatalytic reaction module 1 is the same. Through the main water supply pipe 45, the quantitative transportation of sewage in the first reaction cylinder 5 of each photocatalytic reaction module 1 can be realized. Through the main drainage pipe 46, the sewage that has completed the three-stage photocatalytic treatment in each photocatalytic reaction module 1 can be discharged and collected. Through the main air supply pipe 47, the air transportation in the horizontal air guide pipe 25 of each photocatalytic reaction module 1 can be realized. The photocatalytic reaction process in each photocatalytic reaction module 1 in this embodiment is as described in Embodiment 2.

[0047] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A photocatalytic reaction system based on sewage treatment, characterized in that: It comprises a photocatalytic reaction module (1); the photocatalytic reaction module (1) comprises a reaction bearing assembly (2), and a first reaction mechanism (3) and a second reaction mechanism (4) are installed inside the reaction bearing assembly (2); The first reaction mechanism (3) comprises a first reaction cylinder (5), a first flow guide component (6) is installed at the bottom of the first reaction cylinder (5), a light source component (7) is sleeved on the outside of the first reaction cylinder (5), and a flow mixing component (8) is installed inside the first reaction cylinder (5); The second reaction mechanism (4) comprises a second reaction cylinder (9), a second flow guide component (10) is installed at the bottom of the second reaction cylinder (9), a light source component (7) is sleeved on the outside of the second reaction cylinder (9), a flow mixing component (8) is installed inside the second reaction cylinder (9), the first flow guide component (6) is in one-way communication with the second flow guide component (10) at its rear end, and the second flow guide component (10) is in one-way communication with the second flow guide component (10) at its rear end; The mixing flow component (8) comprises a rotatably arranged spiral delay plate (11), a pressurized water supply pipe (12) is arranged above the spiral delay plate (11), and the water inlet end of the first reaction cylinder (5) is arranged at the top thereof; The first flow guide assembly (6) and the second flow guide assembly (10) both comprise a flow guide box (13), a catalyst storage portion is fixedly installed inside the flow guide box (13), a flow guide cavity (14) is provided between the catalyst storage portion and the flow guide box (13), and water holes (15) communicating with the flow guide cavity (14) are evenly provided on the catalyst storage portion; The pressurized water supply pipe (12) at the first reaction cylinder (5) is used to press the sewage therein into the second reaction cylinder (9) at the rear end, and the pressurized water supply pipe (12) at the second reaction cylinder (9) is used to press the sewage therein into the second reaction cylinder (9) at the rear end.

2. A photocatalytic reaction system based on sewage treatment according to claim 1, characterized in that: The reaction bearing assembly (2) comprises a bearing base (16), two vertical bearing frames (17) are symmetrically mounted on the top of the bearing base (16), a first supporting frame (18) and a second supporting frame (19) are respectively mounted between the vertical bearing frames (17), a plurality of cylinder positioning grooves (20) are arranged on the top of the first supporting frame (18), and a U-shaped mounting seat (21) corresponding to the cylinder positioning grooves (20) is fixedly arranged on the top of the second supporting frame (19); A water supply pipe (22) is installed on the vertical support frame (17) on the side close to the first reaction mechanism (3), and a drainage pipe (23) and an air supply pipe (24) are installed on the vertical support frame (17) on the side far from the first reaction mechanism (3). The water supply pipe (22) and the air supply pipe (24) are both located at the top of the vertical support frame (17), and the drainage pipe (23) is located at the bottom of the vertical support frame (17). A horizontal air guide pipe (25) for plugging and cooperating with the air supply pipe (24) is installed at the bottom of the second support frame (19).

3. A photocatalytic reaction system based on sewage treatment according to claim 2, characterized in that: A support cover (26) coaxial with the guide box (13) is arranged above the guide box (13); the support cover (26) is connected to the guide box (13) via a fixing plate (27); the catalyst storage portion is composed of a guide hopper (28) and a conical storage ring (29); the guide hopper (28) is concentrically fixed to the top of the conical storage ring (29); the top of the guide hopper (28) and the bottom of the conical storage ring (29) are both fixed to the inner wall of the guide box (13); and the water holes (15) are evenly arranged on the peripheral side of the guide hopper (28).

4. A photocatalytic reaction system based on sewage treatment according to claim 3, characterized in that: A water outlet connecting pipe (30) communicating with the flow guide cavity (14) is installed on the peripheral side of the flow guide box (13), and a first solenoid valve (31) is installed on the water outlet connecting pipe (30); a water inlet connecting pipe (32) communicating with the flow guide cavity (14) is installed on the peripheral side of the flow guide box (13) on the second flow guide component (10), and a one-way valve (33) is installed on the water inlet connecting pipe (32); the water outlet connecting pipe (30) on the first flow guide component (6) is connected to the water inlet connecting pipe (32) at its rear end through a flange; the water outlet connecting pipe (30) on the second flow guide component (10) is connected to the water inlet connecting pipe (32) at its rear end through a flange; and the drainage connecting pipe (23) is connected to the water outlet connecting pipe (30) at its front end through a flange.

5. A photocatalytic reaction system based on sewage treatment according to claim 4, characterized in that: The bottom of the first reaction cylinder (5) and the second reaction cylinder (9) are both provided with a sealing groove, the top of the guide box (13) is fixedly provided with a sealing ring (34) adapted to the sealing groove, the bottoms of the first reaction cylinder (5) and the second reaction cylinder (9) are respectively tightly fitted on the top of the corresponding guide box (13), the guide box (13) is installed inside the cylinder body positioning groove (20), the side surfaces of the first reaction cylinder (5) and the second reaction cylinder (9) are both provided with an air release pipe (35) near the top, the air release pipe (35) is provided with a second electromagnetic valve (36), the side surfaces of the first reaction cylinder (5) are provided with a water delivery pipe (37) near the top, the water delivery pipe (37) is provided with a third electromagnetic valve (38), and the water delivery pipe (37) is plug-fitted with the water supply pipe (22).

6. A photocatalytic reaction system based on sewage treatment according to claim 5, characterized in that: The light source assembly (7) comprises a light source installation tube (39) supported inside a supporting cover (26), a plurality of ultraviolet lamp tubes (40) are arranged in a circular array on the inner wall of the light source installation tube (39), and the first reaction tube (5) and the second reaction tube (9) are respectively sleeved inside the corresponding supporting cover (26).

7. A photocatalytic reaction system based on sewage treatment according to claim 6, characterized in that: The mixed flow assembly (8) further comprises a top sealing cover (41), the top of each of the first reaction tube (5) and the second reaction tube (9) being provided with a top sealing cover (41), the top of the U-shaped mounting seat (21) being provided with a mixed flow motor (42), the output end of the mixed flow motor (42) being connected with a mixed flow shaft (43) rotatably connected to the second support frame (19), the mixed flow shaft (43) passing through the top sealing cover (41) and the two being rotatably connected, the spiral delay plate (11) being fixedly mounted on the mixed flow shaft (43), the pressurized water supply pipe (12) being connected and arranged at the top of the top sealing cover (41), the pressurized water supply pipe (12) being provided with a fourth solenoid valve (44), and the horizontal air guide pipe (25) being connected and arranged with each pressurized water supply pipe (12) on one side thereof.

8. A photocatalytic reaction system based on sewage treatment according to claim 7, characterized in that: It also includes a water supply main pipe (45), a drainage main pipe (46) and a gas supply main pipe (47); a plurality of groups of photocatalytic reaction modules (1) are installed between the water supply main pipe (45) and the drainage main pipe (46); the water supply main pipe (45) and each water supply pipe (22) are connected via a flange, the drainage main pipe (46) and each drainage pipe (23) are connected via a flange, and the gas supply main pipe (47) and each gas supply pipe (24) are connected via a flange.

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