CN116655047B - Magnetic stabilization fluidized bed photocatalytic reactor and method for treating refractory organic wastewater by using same - Google Patents
Magnetic stabilization fluidized bed photocatalytic reactor and method for treating refractory organic wastewater by using same Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention discloses a photocatalysis reactor of a magnetic stabilization bed and a method for treating organic wastewater difficult to degrade, wherein part of ultraviolet light generated by an ultraviolet lamp is collected by a condensing lens body in a condensing notch, meanwhile, the ultraviolet light in the inner area of a condensing block is collected onto a light guide slat under the action of a main reflecting layer, the light guide slat and the condensing block transmit the collected ultraviolet light through a light guide pipe, a vacuum light-transmitting pipe positioned at the periphery of the light guide pipe expands the divergence range of the ultraviolet light on the light guide pipe, meanwhile, the light guide plate is used for diffusing part of the ultraviolet light in the light guide pipe into the organic wastewater in a shielding area below a bubble-blocking screen plate for photocatalysis, a light-scattering concave lens diverges the ultraviolet light transmitted by the extending end of the light guide pipe to an end of an auxiliary reflecting layer, and the auxiliary reflecting layer uniformly reflects the incident ultraviolet light to the organic wastewater outside the reflecting ring sleeve; the air bubble blocking screen plate positioned below the light pipe can conduct flow guiding and blocking on air bubbles entering the vacuum light-transmitting pipe area.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment methods, and particularly relates to a magnetic stabilization bed photocatalytic reactor and a method for treating refractory organic wastewater by using the same.
Background
The literature provided by the magnetic catalyst reactor coupling magnetic separation device of Li Yu describes that a bed medium in a magnetically stabilized fluidized bed adopts a magnetic medium, an external magnetic field is applied besides a flow field and a gravitational field, a stable or alternating electromagnetic field is usually adopted as the magnetic field, a Helmholtz coil is adopted as the magnetic field generation mode, the magnetic field strength is controlled by adopting the current strength, and the bed medium selects a mixed solution of a suspension photocatalyst formed by mixing magnetic photocatalyst particles and water to be treated, and circulates in a photocatalytic reaction area under the action of gas, so that the function of the magnetically stabilized fluidized bed photocatalytic reactor is realized.
For example, chinese patent publication No. CN101913680B discloses a photocatalytic reactor with a magnetic stabilized bed and a method for treating organic wastewater difficult to degrade, which solve the problems of low photocatalytic quantum rate, low activity and easy loss of active components in the existing photocatalytic method, wherein the organic wastewater is sent to the reactor through a pump and a liquid inlet, a magnetically supported photocatalyst is added into the reactor through a catalyst feed inlet, and after a fan is started and passes through a flow buffer, gas enters a gas distributor, so that the magnetically supported photocatalyst is in a suspension state; and (3) opening a Helmholtz coil, generating a magnetic field by the coil, enabling the magnetic supported photocatalyst to be in a static suspension state, opening an ultraviolet lamp, degrading the organic wastewater, and discharging the treated organic wastewater to a second liquid storage tank. The utilization rate of light energy can be improved, the magnetic supported photocatalyst is in a stable suspension state, and the mutual friction can be reduced to ensure that active components are lost; an ultraviolet lamp with a sleeve is arranged in the center of the inside of the cylindrical barrel.
For example, chinese patent publication No. CN110902753a discloses an ultraviolet sterilizing and disinfecting device for treating urban sewage, and the background of the specification describes that sewage with a long distance from a lamp tube has a poor disinfecting effect compared with sewage with a short distance from the lamp tube, and bubbles in the sewage can cause refraction of ultraviolet light, so that part of sewage cannot absorb ultraviolet light, and the sterilizing and disinfecting effect is reduced.
However, the above scheme has the following disadvantages:
in the process of treating organic wastewater difficult to degrade through the magnetically stabilized fluidized bed photocatalytic reactor, bubbles on the periphery of the ultraviolet light lamp can be caused by the fact that the gas distributor discharges the organic wastewater to be difficult to fully absorb ultraviolet light, meanwhile, the ultraviolet light lamp is placed at the center of the cylindrical barrel body through the sleeve, the ultraviolet light lamp is difficult to carry out photocatalytic reaction on the organic wastewater far away from the ultraviolet light lamp, how to further improve the sleeve inside the reaction barrel body, and the problem that the influence of refraction weakening of the bubbles on the generated ultraviolet light reaction area is needed to be solved when the organic wastewater far away from the ultraviolet light lamp is ensured to be irradiated by ultraviolet rays and subjected to photocatalysis can be reduced.
Disclosure of Invention
The invention aims to provide a magnetic stabilization bed photocatalytic reactor and a method for treating refractory organic wastewater, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a magnetism stationary flow bed photocatalysis reactor, includes the reaction barrel and sets up the helmholtz coil in its both sides, the reaction barrel central point puts and vertically presets the printing opacity sleeve, and inside presets the ultraviolet lamp of printing opacity sleeve, just inside bottom of reaction barrel presets the gas distributor that is used for discharging the bubble, the spotlight notch has been laid to the circumference on the printing opacity sleeve lateral wall, spotlight cover is overlapped in spotlight notch outside, the spotlight cover lateral wall runs through there is the light pipe, just spotlight lens body is provided with near ultraviolet lamp department in spotlight notch inboard, the annular is provided with the reflection ring cover on the reaction barrel inside wall, the light pipe outer end extends to inside the reflection ring cover, just light pipe outer end extension cover is equipped with the astigmatic concave lens, the ultraviolet ray that ultraviolet lamp partial region produced is through spotlight cover, light pipe, astigmatic lens and reflection ring cover evenly shines the organic waste water that keeps away from the ultraviolet lamp region after passing through spotlight lens body spotlight in proper order;
the light guide tube is characterized in that a bubble blocking screen plate is arranged below the light guide tube, a light guide plate extending to the outer surface of the light guide tube is arranged on the bubble blocking screen plate in a penetrating mode, and the light guide plate is used for diffusing ultraviolet light on the inner side of the light guide tube to organic wastewater in a shielding area below the bubble blocking screen plate for photocatalysis.
Preferably, the cross section of the port at the inner side of the light gathering notch is of an outward-expansion structure and is used for generating ultraviolet rays in a corresponding area of the ultraviolet lamp and gathering the ultraviolet rays on the light gathering lens body in a large range.
Preferably, the inside cavity that has of snoot fills and is provided with the spotlight piece, just be provided with main reflector layer between snoot inside wall and the spotlight piece, the light guide pipe advances the light end and extends to the spotlight piece inside, just the inside upper and lower side of spotlight piece is all embedded to be provided with the leaded light slat, and leaded light slat both sides port extends to spotlight piece lateral wall and light guide pipe respectively and advances the light end, and main reflector layer is gone up the interior regional ultraviolet ray reflection of spotlight piece and is gone up to the leaded light slat.
Preferably, the outside of the light pipe is circumferentially sleeved with a vacuum light-transmitting pipe, ports on two sides of the vacuum light-transmitting pipe are respectively and hermetically fixed with the light condensing cover and the reflecting ring sleeve, a vacuum gap of 1-5 cm is formed between the vacuum light-transmitting pipe and the outer wall of the light pipe, the light guide plate penetrates through the vacuum light-transmitting pipe, and the bubble-blocking screen is positioned below the vacuum light-transmitting pipe and shields at least two-thirds of the bottom area of the vacuum light-transmitting pipe and guides and blocks bubbles passing through the vacuum light-transmitting pipe area from bottom to top.
Preferably, the inner wall of the light pipe is provided with a reflecting arc plate corresponding to the position of the light guide plate, the reflecting arc plate is used for reflecting ultraviolet light passing through the light pipe part to the light guide plate for transmission, a light guide diffusion part is arranged between the extension part at the outer end of the light pipe and the light-scattering concave lens, the inner wall of the reflecting ring sleeve is provided with an auxiliary reflecting layer, and the auxiliary reflecting layer uniformly reflects the ultraviolet light scattered by the light-scattering concave lens and transmits the reflecting ring sleeve to the organic wastewater side far away from the ultraviolet lamp for photocatalysis.
A method for treating refractory organic wastewater, which uses the magnetic stabilization bed photocatalytic reactor, comprises the following steps:
A. adding a magnetic supported photocatalyst into the reaction cylinder, discharging an external oxygen source into the reaction cylinder from a gas distributor to enable the magnetic supported photocatalyst to be in a suspension state, sequentially starting a Helmholtz coil and an ultraviolet lamp through an external power supply controller, discharging organic wastewater from a liquid inlet end at the bottom of the reaction cylinder, and finally discharging from a liquid outlet end at the top side;
B. part of ultraviolet light generated by the ultraviolet lamp is collected by a condensing lens body in a condensing notch, the collected ultraviolet light irradiates a condensing block in a condensing cover, meanwhile, the ultraviolet light in the inner side area of the condensing block is collected onto a light guide slat under the action of a main reflecting layer, and the light guide slat and the condensing block transmit the collected ultraviolet light through a light guide pipe;
C. the vacuum light-transmitting tube positioned at the periphery of the light pipe expands the divergence range of ultraviolet rays on the light pipe, meanwhile, the light-guiding plate is used for diffusing partial ultraviolet rays at the inner side of the light pipe into organic wastewater in a shielding area below the bubble-blocking screen plate to perform photocatalysis, the light-diffusing concave lens diverges the ultraviolet rays transmitted by the extending end of the light pipe to the end of the auxiliary reflecting layer, the auxiliary reflecting layer uniformly reflects the incident ultraviolet rays to the organic wastewater at the outer side of the reflecting ring sleeve, and the bubble-blocking screen plate positioned below the light pipe can conduct diversion blocking on bubbles entering the vacuum light-transmitting tube area.
Compared with the prior art, the invention has the beneficial effects that:
1. the ultraviolet light generated by the ultraviolet lamp is collected by a condensing lens body in a condensing notch, the collected ultraviolet light irradiates a condensing block in a condensing cover, meanwhile, the ultraviolet light in the inner side area of the condensing block is collected on a light guide slat under the action of a main reflecting layer, the light guide slat and the condensing block transmit the collected ultraviolet light through a light guide pipe, a vacuum light transmitting pipe arranged on the periphery of the light guide pipe expands the divergence range of the ultraviolet light on the light guide pipe, meanwhile, the light guide plate is used for diffusing the ultraviolet light in the inner side part of the light guide pipe into organic wastewater in a shielding area below a bubble blocking screen plate for photocatalysis, the light diffusing concave lens diverges the ultraviolet light transmitted by an extending end of the light guide pipe to an end of an auxiliary reflecting layer, and the auxiliary reflecting layer uniformly reflects the incident ultraviolet light to the organic wastewater outside a reflecting ring sleeve;
2. the air bubble blocking screen plate positioned below the light pipe can conduct flow guiding and blocking on air bubbles entering the vacuum light-transmitting pipe area.
Drawings
FIG. 1 is a schematic cross-sectional view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of a partial area of the light transmissive sleeve of FIG. 1;
FIG. 3 is a schematic diagram of the partial mating area of the reaction cylinder, light transmissive sleeve, light gathering cover and light pipe of the present invention in semi-sectional configuration;
FIG. 4 is an enlarged schematic view of FIG. 3 at A;
FIG. 5 is an enlarged schematic view of FIG. 3 at B;
FIG. 6 is a schematic view of a partial structure of a bubble-blocking mesh plate according to the present invention.
In the figure: 1. a reaction cylinder; 2. a helmholtz coil; 3. a light-transmitting sleeve; 4. an ultraviolet lamp; 5. a gas distributor; 6. a light gathering notch; 7. a light-gathering cover; 8. a light pipe; 9. a condensing lens body; 10. a reflective collar; 11. a astigmatic concave lens; 12. a bubble blocking screen; 13. a light guide plate; 14. a condensing block; 15. a main reflective layer; 16. light guide strip plate; 17. a vacuum light transmitting tube; 18. a reflective arc plate; 19. a light guide diffusion section; 20. and a sub-reflecting layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
embodiment one:
the utility model provides a magnetism stationary flow bed photocatalysis reactor, including reaction barrel 1 and set up in its both sides helmholtz coil 2, the concrete configuration of reaction barrel 1 can refer to the China's authorized patent of a magnetism stationary flow bed photocatalysis reactor of bulletin number CN101913680B and its method of handling difficult degradation organic waste water, do not make for the details, helmholtz coil 2 is connected with external power supply controller, preset the light-transmitting sleeve 3 along vertical in reaction barrel 1 central point, light-transmitting sleeve 3 is formed by quartz glass material, preset ultraviolet lamp 4 in the inside of light-transmitting sleeve 3, and reaction barrel 1 inside bottom presets and is used for discharging the gaseous distributor 5 of bubble, gaseous distributor 5 can be by the aeration pipe, for the mature product of prior art, do not make for the repetition, annular layout has spotlight notch 6 on the lateral wall of light-transmitting sleeve 3, spotlight notch 6 outside cover is equipped with spotlight cover 7, spotlight 8 is run through to spotlight 6 inboard, and be provided with spotlight 9 in the department near spotlight 4, annular and be provided with the light-transmitting sleeve 10 on reaction barrel 1 inside lateral wall along vertical presets, light-reflecting ring 10 is equipped with spotlight 4, the light-reflecting ring 10 is equipped with the light-reflecting ring 10 and the light-reflecting ring 10 is equipped with the light-reflecting ring 10 and the light-reflecting ring 11 is equipped with the light-reflecting ring 8 and the ultraviolet light-reflecting ring region of light-reflecting ring 8 is passed through the light-reflecting ring 8 and the light-reflecting ring 8 is equipped with the light-reflecting ring-reflecting region of the light-reflecting sleeve 4 and the ultraviolet light-reflecting ring is far from the inner region of the light-reflecting sleeve 4 to the ultraviolet light-reflecting ring 11, the ultraviolet light is formed by the ultraviolet light-reflecting tube is far from the ultraviolet light-reflecting layer;
the light pipe 8 below is provided with and blocks bubble otter board 12, blocks bubble otter board 12 and goes up mesh aperture and is less than gas distributor 5 production bubble diameter, and blocks bubble otter board 12 and go up to arrange and run through and have the light guide plate 13 that extends to the light pipe 8 surface, light guide plate 13 is optics level acrylic (PMMA), and light guide plate 13 is used for carrying out the photocatalysis in the organic waste water that blocks the regional below bubble otter board 12 with the inside part ultraviolet ray diffusion of light pipe 8 to enlarge the diffusion scope of ultraviolet ray.
Embodiment two:
on the basis of the first embodiment, as shown in fig. 4, the cross section of the inner side port of the light gathering notch 6 is in an outward-expansion structure, and is used for generating ultraviolet rays in the corresponding area of the ultraviolet lamp 4 and gathering the ultraviolet rays on the light gathering lens body 9 in a large range;
the inside of the light-gathering cover 7 is provided with a cavity and is filled with a light-gathering block 14, the light-gathering block 14 is made of quartz glass or any one of optical acrylic (PMMA), a main reflecting layer 15 is arranged between the inner side wall of the light-gathering cover 7 and the light-gathering block 14, the main reflecting layer 15 can be any one of a reflecting lens or a reflecting coating, the reflecting lens can be any one of a silver-plated lens and a hammer diamond embossing aluminum plate, the light-guiding plate 8 is a mature product in the prior art, the light-entering end of the light-guiding plate 8 extends into the inside of the light-gathering block 14, the upper side and the lower side of the inside of the light-gathering block 14 are respectively embedded with a light-guiding strip 16, the light-guiding strip 16 is made of quartz glass or any one of optical acrylic (PMMA), two side ports of the light-guiding strip 16 extend to the outer side wall of the light-gathering block 14 and the light-entering end of the light-guiding plate 8 respectively, the main reflecting layer 15 reflects ultraviolet rays in the inner side area of the light-gathering block 14 onto the light-guiding strip 16, and the light-guiding strip 16 can transmit ultraviolet rays on the light-guiding strip 8.
Embodiment III:
on the basis of the first embodiment, the outer side of the light pipe 8 is circumferentially sleeved with a vacuum light-transmitting pipe 17, the vacuum light-transmitting pipe 17 is made of quartz glass materials, the inside is vacuumized, ports on two sides of the vacuum light-transmitting pipe 17 are respectively sealed and fixed with the light-condensing cover 7 and the reflecting ring sleeve 10, a vacuum gap of 1 cm to 5cm is formed between the vacuum light-transmitting pipe 17 and the outer wall of the light pipe 8, the light guide plate 13 penetrates through the vacuum light-transmitting pipe 17, the air-blocking screen 12 is positioned below the vacuum light-transmitting pipe 17 and shields at least two thirds of the bottom area of the vacuum light-transmitting pipe 17, the air-blocking screen 12 is of an arc-shaped plate structure, so that air bubbles can move forward and backward along the arc-shaped surface of the air-blocking screen without generating air bubble accumulation, the air-blocking screen 12 guides and blocks air bubbles passing through the vacuum light-transmitting pipe 17 area from bottom to top, meanwhile, 1mm super-hydrophobic coating produced by new materials is coated on the outer surface of the air-blocking screen 12, the arrangement of the hydrophobic coating avoids the blocked air bubbles from accumulating on the lower surface of the air-blocking screen 12, and simultaneously the air bubbles conveniently move along the arc-blocking screen 12 and climb along the bottom area of the air-blocking screen 17, and the air-blocking screen 12 can enter the vacuum light-blocking area below the air-transmitting screen 12;
the inner wall of the light pipe 8 is provided with a reflecting arc plate 18 corresponding to the position of the light guide plate 13, the reflecting arc plate 18 is formed by adopting a silver-plated reflecting mirror, meanwhile, a through hole which is not shown is arranged on the side wall of the reflecting arc plate 18, the through hole is used for passing partial ultraviolet rays of the reflecting arc plate 18, the lower part of the light pipe 8 is prevented from being completely blocked by the reflecting arc plate 18 through the ultraviolet rays, the reflecting arc plate 18 is used for reflecting the ultraviolet rays passing through the light guide pipe 8 to the light guide plate 13 for transmission, a light guide diffusion part 19 is arranged between the extending part of the outer end of the light guide pipe 8 and the light scattering concave lens 11, the light guide diffusion part 19 is of a fan-shaped structure and is used for diffusing the ultraviolet rays emitted by the extending end of the light guide pipe 8, so that the diffusion range of the light scattering concave lens 11 is further improved, the inner side wall of the reflecting ring sleeve 10 is provided with a subsidiary reflecting layer 20, the subsidiary reflecting layer 20 is consistent with the selection material of the main reflecting layer 15, the ultraviolet rays diffused by the light scattering concave lens 11 can be effectively reflected, and the subsidiary reflecting layer 20 uniformly reflects the ultraviolet rays diffused by the light scattering concave lens 11 to the organic wastewater far away from the ultraviolet lamp 4 through the reflecting ring sleeve 10.
A method for treating refractory organic wastewater, which uses the magnetic stabilization bed photocatalytic reactor, comprises the following steps:
A. adding a magnetic supported photocatalyst into the reaction cylinder 1, discharging an external oxygen source into the reaction cylinder 1 from a gas distributor 5 to enable the magnetic supported photocatalyst to be in a suspension state, sequentially starting a Helmholtz coil 2 and an ultraviolet lamp 4 through an external power supply controller, discharging organic wastewater from a liquid inlet end at the bottom of the reaction cylinder 1, and finally discharging the organic wastewater from a liquid outlet end at the top side;
B. part of the ultraviolet light generated by the ultraviolet lamp 4 is collected by the condensing lens body 9 in the condensing notch 6, the collected ultraviolet light irradiates the condensing block 14 in the light-condensing cover 7, meanwhile, the ultraviolet light in the inner area of the condensing block 14 is collected onto the light guide strip plate 16 under the action of the main reflecting layer 15, and the light guide strip plate 16 and the condensing block 14 transmit the collected ultraviolet light through the light guide tube 8;
C. the vacuum light-transmitting tube 17 positioned at the periphery of the light pipe 8 enlarges the ultraviolet radiation divergence range of the light pipe 8, meanwhile, the light guide plate 13 is used for diffusing part of ultraviolet radiation at the inner side of the light pipe 8 into organic wastewater in a shielding area below the bubble-blocking screen 12 to perform photocatalysis, the light-diffusing concave lens 11 diverges the ultraviolet radiation transmitted by the extending end of the light pipe 8 to the end of the auxiliary light-reflecting layer 20, the auxiliary light-reflecting layer 20 uniformly reflects the incident ultraviolet radiation to the organic wastewater at the outer side of the reflecting ring sleeve 10, and the bubble-blocking screen 12 positioned below the light pipe 8 can conduct diversion blocking on bubbles entering the vacuum light-transmitting tube 17 area.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (6)
1. The utility model provides a magnetism stationary flow fluidized bed photocatalytic reactor, includes the reaction barrel and sets up the helmholtz coil in its both sides, reaction barrel central point puts and vertically presets the printing opacity sleeve along, and the inside ultraviolet lamp that presets of printing opacity sleeve, just reaction barrel inside bottom presets the gas distributor who is used for discharging the bubble, its characterized in that: a light gathering notch is circumferentially arranged on the side wall of the light transmission sleeve, a light gathering cover is sleeved on the outer side of the light gathering notch, a light guide tube penetrates through the outer side wall of the light gathering cover, a light gathering lens body is arranged on the inner side of the light gathering notch and close to the ultraviolet lamp, a reflecting ring sleeve is annularly arranged on the inner side wall of the reaction cylinder, the outer end of the light guide tube extends into the reflecting ring sleeve, a light scattering concave lens is sleeved on the extending part of the outer end of the light guide tube, and ultraviolet light generated by a partial region of the ultraviolet lamp uniformly irradiates organic wastewater far away from the ultraviolet lamp region through the light gathering cover, the light guide tube, the light scattering concave lens and the reflecting ring sleeve after being condensed by the light gathering lens body;
the light guide tube is characterized in that a bubble blocking screen plate is arranged below the light guide tube, a light guide plate extending to the outer surface of the light guide tube is arranged on the bubble blocking screen plate in a penetrating mode, and the light guide plate is used for diffusing ultraviolet light on the inner side of the light guide tube to organic wastewater in a shielding area below the bubble blocking screen plate for photocatalysis.
2. A magnetically stabilized bed photocatalytic reactor according to claim 1, characterized in that: the cross section of the port at the inner side of the condensing notch is of an outward-expansion structure and is used for generating ultraviolet rays in a corresponding area of the ultraviolet lamp and collecting the ultraviolet rays on the condensing lens body in a large range.
3. A magnetically stabilized bed photocatalytic reactor according to claim 1, characterized in that: the light guide plate is characterized in that a cavity is formed in the light condensing cover, a light condensing block is filled and arranged in the light condensing cover, a main reflecting layer is arranged between the inner side wall of the light condensing cover and the light condensing block, the light inlet end of the light guide pipe extends to the inside of the light condensing block, the upper side and the lower side of the inside of the light condensing block are respectively embedded and provided with a light guide strip plate, ports on two sides of the light guide strip plate extend to the outer side wall of the light condensing block and the light inlet end of the light guide pipe respectively, and ultraviolet rays in the inner side area on the light condensing block are reflected onto the light guide strip plate by the main reflecting layer.
4. A magnetically stabilized bed photocatalytic reactor according to claim 3, characterized in that: the vacuum light-transmitting tube is sleeved on the outer side of the light pipe along the circumferential direction, ports on two sides of the vacuum light-transmitting tube are respectively fixed with the light condensing cover and the reflecting ring sleeve in a sealing mode, a vacuum gap of 1-5 cm is formed between the vacuum light-transmitting tube and the outer wall of the light pipe, the light guide plate penetrates through the vacuum light-transmitting tube, and the air bubble blocking net plate is located below the vacuum light-transmitting tube and shields at least two-thirds of the area of the bottom of the air bubble blocking net plate and guides and blocks air bubbles passing through the vacuum light-transmitting tube area from bottom to top.
5. The magnetically stabilized bed photocatalytic reactor according to claim 4, characterized in that: the light guide tube comprises a light guide tube body, wherein the inner wall of the light guide tube body is provided with a light guide plate, the light guide plate is arranged at the position corresponding to the light guide plate, the light guide plate is used for reflecting ultraviolet rays passing through the light guide tube body to the light guide plate for transmission, a light guide diffusion part is arranged between an extending part at the outer end of the light guide tube body and a light scattering concave lens, the inner wall of a reflecting ring sleeve is provided with an auxiliary reflecting layer, and the auxiliary reflecting layer uniformly reflects the ultraviolet rays scattered by the light scattering concave lens and transmits the reflecting ring sleeve to the side of organic wastewater far away from the ultraviolet lamp for photocatalysis.
6. A method for treating refractory organic wastewater by using the magnetic stabilization bed photocatalytic reactor according to claim 5, characterized by comprising the following steps:
A. adding a magnetic supported photocatalyst into the reaction cylinder, discharging an external oxygen source into the reaction cylinder from a gas distributor to enable the magnetic supported photocatalyst to be in a suspension state, sequentially starting a Helmholtz coil and an ultraviolet lamp through an external power supply controller, discharging organic wastewater from a liquid inlet end at the bottom of the reaction cylinder, and finally discharging from a liquid outlet end at the top side;
B. part of ultraviolet light generated by the ultraviolet lamp is collected by a condensing lens body in a condensing notch, the collected ultraviolet light irradiates a condensing block in a condensing cover, meanwhile, the ultraviolet light in the inner side area of the condensing block is collected onto a light guide slat under the action of a main reflecting layer, and the light guide slat and the condensing block transmit the collected ultraviolet light through a light guide pipe;
C. the vacuum light-transmitting tube positioned at the periphery of the light pipe expands the divergence range of ultraviolet rays on the light pipe, meanwhile, the light-guiding plate is used for diffusing partial ultraviolet rays at the inner side of the light pipe into organic wastewater in a shielding area below the bubble-blocking screen plate to perform photocatalysis, the light-diffusing concave lens diverges the ultraviolet rays transmitted by the extending end of the light pipe to the end of the auxiliary reflecting layer, the auxiliary reflecting layer uniformly reflects the incident ultraviolet rays to the organic wastewater at the outer side of the reflecting ring sleeve, and the bubble-blocking screen plate positioned below the light pipe can conduct diversion blocking on bubbles entering the vacuum light-transmitting tube area.
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