Multi-element circulating elution type photocatalytic falling film reactor

Abstract

The application provides a multi-element circulating elution type photocatalytic falling film reactor, which comprises a shell and photocatalytic fiber membranes, a first cavity is formed in the shell, a plurality of partition plates and photocatalytic fiber membranes are fixedly arranged in the first cavity, characterized in that a plurality of light sources are arranged on the two side surfaces of the photocatalytic fiber membranes, a spraying mechanism is arranged on the partition plates and the photocatalytic fiber membranes, the spraying mechanism comprises a main spraying assembly and a secondary spraying assembly, a first opening is formed in the shell, a connecting pipe is fixedly connected to the first opening, and the connecting pipe is fixedly connected with the secondary spraying assembly. According to the scheme, the circulating spraying mechanism is arranged in the first cavity, and a plurality of photocatalytic fiber membranes are vertically arranged, so that the organic wastewater is circulated through the main spraying assembly and the secondary spraying assembly, and the vertically arranged photocatalytic fiber membranes can be fully contacted with the organic wastewater, thereby achieving the purpose of ensuring the purification rate of the organic matter in the organic wastewater.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water pollution treatment equipment, in particular to a multi-element circulating leaching type photocatalytic falling film reactor. BACKGROUND

[0002] Photocatalysis is a technology that uses light energy to drive chemical reactions, widely used in environmental governance, energy conversion and other fields. In the photocatalytic process, the catalyst generates electron-hole pairs under light, which can react with water or oxygen to generate active oxygen species, which further participate in various chemical reactions.

[0003] For example, a "circulating wastewater photocatalytic treatment device" (patent number: CN111573937B) is disclosed in Chinese patent, which includes a primary treatment tank and a circulating treatment tank. The bottom of the primary treatment tank is provided with a catalyst rotating spraying assembly, the middle of the primary treatment tank is provided with a light source assembly, and the catalyst rotating spraying assembly and the light source assembly are respectively fixedly connected with the double-shaft motor provided at the bottom of the primary treatment tank, and the double-shaft motor drives the light source assembly and the catalyst rotating spraying assembly to rotate in the primary treatment tank. The circulating treatment tank is provided with a solid-liquid separation assembly, and the liquid outlet at the bottom of the circulating treatment tank is communicated with a liquid return treatment pipeline, the other end of the liquid return treatment pipeline is communicated with the upper part of the circulating treatment tank, and the middle part of the liquid return treatment pipeline is communicated with a secondary catalytic treatment assembly. The above-mentioned patent has the advantage of providing sufficient light for photocatalysis.

[0004] However, in the above-mentioned wastewater treatment process, since the catalyst is sprayed, the contact efficiency of the catalyst with the wastewater is low, so the purification rate of the organic matter in the organic wastewater is low, and since the liquid level of the wastewater is easy to cover the light source in the above-mentioned wastewater treatment process, the sludge generated by the reaction is easy to block the light source. SUMMARY

[0005] (I) Technical problems to be solved

[0006] In view of the deficiencies of the prior art, the present application provides a multi-element circulating leaching type photocatalytic falling film reactor, which solves the problems raised in the above background.

[0007] (II) Technical solutions

[0008] In order to achieve the above object, the present application is realized by the following technical scheme: A multi-element circulating elution type photocatalytic falling film reactor, characterized by comprising a shell and a photocatalytic fiber membrane, a first cavity is formed in the shell, a plurality of partition plates and photocatalytic fiber membranes are fixedly arranged in the first cavity, characterized in that a plurality of light sources are arranged on both sides of the photocatalytic fiber membrane, a spraying mechanism is arranged on the partition plate and the photocatalytic fiber membrane, the spraying mechanism comprises a main spraying assembly and a secondary spraying assembly, a first opening is formed in the shell, a connecting pipe is fixedly connected to the first opening, the connecting pipe is fixedly connected to the secondary spraying assembly, a cleaning assembly is slidably connected to the first opening, the cleaning assembly comprises a dredging plug, a plurality of gap openings are formed in the dredging plug, a second slot is formed in a side of the first cavity close to the first opening, and a driving assembly is arranged in the second slot.

[0009] Preferably, two sliding grooves are formed in the inner circular surface of the first opening, two first sliding blocks are fixedly connected to the dredging plug, the first sliding blocks are slidably connected to the sliding grooves of the first opening, a first rotating shaft is rotatably connected to one end of the dredging plug away from the connecting pipe, a limiting slot is formed in the first rotating shaft, and the limiting slot is rotatably connected to the driving assembly.

[0010] Preferably, the driving assembly comprises a driving arm and a floating sliding block, the driving arm is rotatably connected to the limiting slot, a second opening is formed in one end of the driving arm away from the first rotating shaft, a second rotating shaft is rotatably connected to the second opening, a third opening is formed in the floating sliding block, the second rotating shaft is rotatably connected to the third opening, a waterproof motor is fixedly connected to the floating sliding block, and an output shaft of the waterproof motor is fixedly connected to the second rotating shaft.

[0011] Preferably, the main spraying assembly comprises a first water pump and a spraying pipe, the first water pump is fixedly arranged at one end of the shell, the first water pump is fixedly connected to the spraying pipe, a plurality of spraying openings are formed in the spraying pipe, the spraying openings are formed at one end of the spraying pipe away from the first water pump, the secondary spraying assembly comprises a second water pump and a plurality of spraying pipes, the second water pump is fixedly connected to the connecting pipe, and the spraying pipes are fixedly connected to the second water pump.

[0012] Preferably, a micro switch is fixedly arranged at one end of the floating sliding block close to the second slot, the micro switch is used for triggering the waterproof motor, the second slot is an arc-shaped slot, and the center of the second slot coincides with the axis of the first opening.

[0013] Preferably, the photocatalytic fiber membrane and the shell are provided with a second cavity, and a dredging plug is fixedly arranged on one side wall of the second cavity close to the photocatalytic fiber membrane.

[0014] Preferably, the photocatalytic fiber membrane is obtained by the following steps: low-temperature dissolution of a cellulose raw material by using an alkali-urea mixed solution, addition of a certain amount of a nano-powder catalyst such as graphite phase carbon nitride, ultrasonic stirring, pouring into a polyester fiber matrix, passing through an ethanol coagulation bath to form a gel, washing with deionized water until neutral, and freeze-drying.

[0015] Preferably, a plurality of flow guide grooves are arranged on the inclined surface of the dredging plug.

[0016] (Three) beneficial effects

[0017] The application provides a multi-element circulating and leaching type photocatalytic falling film reactor.

[0018] 1. The first cavity is provided with a circulating spraying mechanism, and a plurality of photocatalytic fiber membranes are vertically arranged, so that the organic wastewater is subjected to multiple photocatalytic reactions after being circulated by the main spraying assembly and the secondary spraying assembly, and the vertically arranged photocatalytic fiber membranes can be fully contacted with the organic wastewater, so that the organic matter purification rate in the organic wastewater is improved.

[0019] 2. The cleaning assembly is arranged at one end of the liquid collecting bottom plate and can be triggered as the liquid level rises, so that when the sediment generated after the organic wastewater is sprayed to the photocatalytic fiber membrane by the spraying mechanism blocks the first opening, the cleaning assembly can automatically push out the blockage in the first opening, thereby preventing the first opening from being blocked.

[0020] 3. The water level in the device does not rise to the height of the light source due to the arrangement of the cleaning assembly, so that the sludge generated by the photocatalytic reaction does not block the light source, and the efficiency of the light irradiation is not affected by the scattering and diffusion of the light in the water. DETAILED DESCRIPTION

[0021] Figure 1 It is a front view structural schematic diagram of the application;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of the photocatalytic fiber membrane of the application;

[0023] Figure 3 It is Figure 2 It is a structural schematic diagram of A in the middle;

[0024] Figure 4 It is a cross-sectional structural schematic diagram of the application;

[0025] Figure 5for Figure 4 A schematic diagram of the structure of B in the middle;

[0026] Figure 6 This is an exploded structural diagram of the cleaning component and the driving component in this invention.

[0027] In the diagram: 11. Outer shell; 12. First cavity; 13. Divider plate; 14. Light source; 15. Photocatalytic fiber membrane; 16. First water pump; 17. First opening; 18. Connecting pipe; 19. Liquid outlet channel; 20. Second water pump; 21. Spray pipe; 22. Second cavity; 23. Unclogging plug; 24. First slider; 25. Gap opening; 26. First rotating shaft; 27. Limiting groove; 28. Drive arm; 29. ​​Second opening; 30. Second slot; 31. Floating slider; 32. Third opening; 33. Second rotating shaft; 34. Waterproof motor; 35. Micro switch; 36. Liquid collection base plate. Detailed Implementation

[0028] This invention provides a multi-element circulating elution type photocatalytic falling film reactor, such as... Figures 1-6 As shown, it includes a housing 11, a first cavity 12, a partition plate 13, a light source 14, a photocatalytic fiber membrane 15, a first water pump 16, a first opening 17, a connecting pipe 18, a liquid outlet channel 19, a second water pump 20, a spray pipe 21, a second cavity 22, a drain plug 23, a first slider 24, a slit opening 25, a first rotating shaft 26, a limiting groove 27, a drive arm 28, a second opening 29, a second slot 30, a floating slider 31, a third opening 32, a second rotating shaft 33, a waterproof motor 34, a micro switch 35, and a liquid collection base plate 36.

[0029] like Figures 1-6 As shown, the device includes a housing 11 and a photocatalytic fiber membrane 15. A first cavity 12 is formed inside the housing 11. Several partition plates 13 and the photocatalytic fiber membrane 15 are fixedly arranged inside the first cavity 12. The device is characterized in that several light sources 14 are arranged on both sides of the photocatalytic fiber membrane 15. Spraying mechanisms are arranged on the partition plates 13 and the photocatalytic fiber membrane 15. The spraying mechanism includes a main spraying component and a secondary spraying component. A first opening 17 is formed on the housing 11. A connecting pipe 18 is fixedly connected to the first opening 17. The connecting pipe 18 is fixedly connected to the secondary spraying component. A cleaning component is slidably connected inside the first opening 17. The cleaning component includes a drain plug 23. Several slits 25 are formed on the drain plug 23. A second groove 30 is formed on the side of the first cavity 12 near the first opening 17. A driving component is arranged inside the second groove 30.

[0030] It is worth noting that the upper half of the partition plate 13 is a hollow hanging rack, the hollow hanging rack of the upper half of the partition plate 13 is used for hanging the light source 14, the part of the partition plate 13 in contact with the second cavity 22 is a solid barrier plate, the first opening 17 is an arc-shaped channel, and the first opening 17 is curved towards the second slot 30.

[0031] The photocatalytic fiber membrane 15 is obtained by the following steps: dissolving a cellulose raw material with an alkali-urea mixed solution at low temperature, adding a certain amount of nano-powder catalyst, usually using graphite phase carbon nitride as the nano-powder catalyst, uniformly stirring by ultrasonic stirring, pouring into a polyester fiber matrix, forming a gel through an ethanol coagulation bath, washing to neutral with deionized water, and freezing and drying to obtain the photocatalytic fiber membrane 15.

[0032] It is worth noting that the nano-powder catalyst in the photocatalytic fiber membrane 15 obtained by the above method is uniformly distributed in the porous cellulose aerogel, and the adsorption capacity of the photocatalytic fiber membrane 15 for organic wastewater is stronger, and the nano-powder catalyst is less likely to be lost, and the mechanical properties of the aerogel are greatly enhanced by the polyester fiber carrier skeleton, and the material durability is improved.

[0033] The second cavity 22 is arranged between the photocatalytic fiber membrane 15 and the shell 11, a liquid collecting bottom plate 36 is fixedly arranged on one side wall of the second cavity 22 close to the shell 11, and the side surface of the liquid collecting bottom plate 36 close to the photocatalytic fiber membrane 15 is a bevel surface, and a plurality of flow guide grooves are arranged on the bevel surface of the liquid collecting bottom plate 36.

[0034] Two sliding grooves are arranged on the inner circular surface of the first opening 17, two first sliding blocks 24 are fixedly connected to the unblocking plug 23, the first sliding blocks 24 are slidingly connected to the sliding grooves of the first opening 17, and a first rotating shaft 26 is rotatably connected to one end of the unblocking plug 23 away from the connecting pipe 18, a limiting groove 27 is arranged on the first rotating shaft 26, and the limiting groove 27 is rotatably connected to the driving assembly.

[0035] The driving assembly comprises a driving arm 28 and a floating sliding block 31, the driving arm 28 is rotatably connected to the limiting groove 27, a second opening 29 is arranged on one end of the driving arm 28 away from the first rotating shaft 26, a second rotating shaft 33 is rotatably connected in the second opening 29, a third opening 32 is arranged on the floating sliding block 31, the second rotating shaft 33 is rotatably connected to the third opening 32, a waterproof motor 34 is fixedly connected to the floating sliding block 31, and an output shaft of the waterproof motor 34 is fixedly connected to the second rotating shaft 33.

[0036] A micro switch 35 is fixedly arranged on one end of the floating sliding block 31 close to the second slot 30, the micro switch 35 is used for triggering the waterproof motor 34, the second slot 30 is an arc-shaped slot, and the center of the second slot 30 coincides with the center of the first opening 17.

[0037] The main spraying assembly comprises the first water pump 16 and the spraying pipe 21, the first water pump 16 is fixedly arranged at one end of the shell 11, the first water pump 16 is fixedly connected with the spraying pipe 21, a plurality of spraying openings are formed in the spraying pipe 21, the spraying openings are formed at the end of the spraying pipe 21 away from the first water pump 16, the secondary spraying assembly comprises the second water pump 20 and a plurality of spraying pipes 21, the second water pump 20 is fixedly connected with the connecting pipe 18, and the spraying pipe 21 is fixedly connected with the second water pump 20.

[0038] When the present scheme is used for photocatalytic falling film, first, the first water pump 16 is started and the light source 14 is powered on, the first water pump 16 sends the organic waste liquid into the spraying pipe 21 of the main spraying assembly, the organic waste liquid is sprayed from the spraying openings of the spraying pipe 21 onto the upper plane of the photocatalytic fiber membrane 15, and flows downward along the photocatalytic fiber membrane 15.

[0039] Then, when the organic waste liquid flows downward along the two side walls of the photocatalytic fiber membrane 15, the organic matter in the organic waste liquid and the nano-powder catalyst in the photocatalytic fiber membrane 15 are catalytically reacted under the irradiation of the light source 14, and the organic matter in the organic waste liquid is gradually decomposed.

[0040] Finally, the organic waste liquid flows to the bottom of the first cavity 12, flows to the first opening 17 along the inclined surface of the liquid collecting bottom plate 36, and enters the second water pump 20 through the first opening 17 and the connecting pipe 18, the second water pump 20 sends the organic waste liquid subjected to preliminary reaction into the spraying pipe 21 of the secondary spraying assembly, and the above steps are repeated until the organic waste liquid is completely purified and discharged from the connecting pipe 18 farthest from the first water pump 16.

[0041] When the sediment generated by the catalytic reaction of the organic waste liquid flows to the first opening 17 along the organic waste liquid and blocks or partially blocks the dredging plug 23, the liquid level in the first cavity 12 rises, the floating sliding block 31 moves upward as the liquid level rises, the floating sliding block 31 slides relative to the second slot 30, when the floating sliding block 31 slides to the top of the second slot 30 and the micro switch 35 contacts the second slot 30, the micro switch 35 sends a trigger signal to the waterproof motor 34, the output shaft of the waterproof motor 34 drives the second rotating shaft 33 to rotate, the second rotating shaft 33 drives the driving arm 28 to rotate around the second rotating shaft 33 as the axis, and the driving arm 28 drives the dredging plug 23 to slide back and forth relative to the first opening 17, so that the sediment blocked at the dredging plug 23 is pushed out of the first opening 17.

[0042] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-element circulating elution type photocatalytic falling film reactor, comprising a shell (11) and a photocatalytic fiber membrane (15), a first cavity (12) is formed in the shell (11), a plurality of partition plates (13) and the photocatalytic fiber membrane (15) are fixedly arranged in the first cavity (12), characterized in that: The photocatalytic fiber membrane (15) is provided with a plurality of light sources (14) on both sides, the partition plate (13) and the photocatalytic fiber membrane (15) are provided with a spraying mechanism, the spraying mechanism comprises a main spraying assembly and a secondary spraying assembly, a first opening (17) is formed in the shell (11), the first opening (17) is fixedly connected with a connecting pipe (18), the connecting pipe (18) is fixedly connected with the secondary spraying assembly, a cleaning assembly is slidably connected in the first opening (17), the cleaning assembly comprises a dredging plug (23), a plurality of gap openings (25) are formed in the dredging plug (23), a second slot (30) is formed in one side of the first cavity (12) close to the first opening (17), and a driving assembly is arranged in the second slot (30). The main spraying assembly comprises a first water pump (16) and a spraying pipe (21), the first water pump (16) is fixedly arranged at one end of the shell (11), the first water pump (16) is fixedly connected with the spraying pipe (21), a plurality of spraying openings are formed in the spraying pipe (21), the spraying openings are formed at one end of the spraying pipe (21) away from the first water pump (16), and the secondary spraying assembly comprises a second water pump (20) and a plurality of spraying pipes (21); the second water pump (20) is fixedly connected with the connecting pipe (18), and the spraying pipes (21) are fixedly connected with the second water pump (20). A second cavity (22) is arranged between the photocatalytic fiber membrane (15) and the shell (11), a liquid collecting bottom plate (36) is fixedly arranged on one side wall of the second cavity (22) close to the shell (11), and one side of the liquid collecting bottom plate (36) close to the photocatalytic fiber membrane (15) is inclined; A plurality of guide grooves are formed in the inclined surface of the liquid collecting bottom plate (36); The photocatalytic fiber membrane (15) is obtained by the following steps: low-temperature dissolution of cellulose raw materials by mixing with an alkali urea solution, addition of a certain amount of nano-powder catalyst, ultrasonic stirring, pouring into a polyester fiber matrix, passing through an ethanol coagulation bath to form a gel, washing with deionized water until neutral, and freeze-drying.

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