A LED photocatalytic reactor

Abstract

The present invention relates to the field of photocatalytic devices, and discloses an LED photoelectrocatalytic reactor, including a reaction box, two opposite inner side walls of the reaction box are respectively provided with multiple groups of symmetrical and evenly distributed fixing clamps, the multiple groups of fixing clamps are respectively inserted with multiple parallel and spaced light guide components, the light guide components include light guide plates; the two outer light emitting surfaces of the light guide plates are provided with convex strips and convex points, and are plated with ITO transparent conductive films connected on both sides, multiple parallel and equidistant vertically arranged light guide plates are divided into two groups of odd and even groups according to the arrangement order, and the ITO transparent conductive films on the two groups of light guide plates are respectively connected to the positive and negative electrodes of a DC bias power supply through leads; the top of the reaction box is provided with a circuit cavity, and the DC bias power supply is provided in the circuit cavity; the top of the circuit cavity is provided with a pretreatment cavity. The present invention has the functions of pre-filtration and pre-purification of wastewater, improves the purification effect, prolongs the service life of the light guide plate, and has a high photocatalytic effect.

Description

Technical Field

[0001] The invention relates to the field of photocatalytic devices, and in particular to an LED photocatalytic reactor. Background Art

[0002] With the advancement of technology, LED light sources are becoming more and more popular because of their advantages such as high luminous efficiency, low power consumption, narrow spectrum, small size, low cost, no pollution, and compliance with the main principles of energy conservation and environmental protection.

[0003] With the rapid development of industry, the problem of wastewater pollution control is becoming more and more serious. Industrial wastewater has different types and production processes, and has the characteristics of large differences in composition, complex components, large amount of pollutants, high COD, many difficult-to-degrade substances, and strong toxicity. Photocatalytic technology stands out among many wastewater treatment processes with its excellent degradation characteristics. It is a very promising wastewater treatment technology in the fields of hospital wastewater, pharmaceutical wastewater, electroplating industry, bleaching and dyeing enterprises, etc.

[0004] For photocatalytic reactions, photogenerated electrons and holes will only be effective when they interact with acceptors or donors in wastewater. In traditional photocatalytic reactors, some photogenerated electrons and holes recombine and disappear during the transmission process to the solid-liquid interface, losing their catalytic effect and resulting in low photocatalytic efficiency. For example, the Chinese patent with announcement number CN105903417B discloses an LED photocatalytic reactor, including a light guide plate, an LED light bar, a polluted liquid container, an ultrasonic decontaminant and a grooved aluminum substrate; the two luminous surfaces of the light guide plate are engraved with non-uniformly distributed dots and coated with a photocatalyst film; the LED light bar includes an LED chip and a PCB board, and the LED light bar is bonded to the bottom of the aluminum substrate groove with a U-shaped cross section with a thermal conductive adhesive, and the inner surface of the aluminum substrate groove is silver-plated to form a U-shaped reflective mirror surface; multiple groups of symmetrical and evenly distributed fixed card slots are provided on the two opposite container walls in the polluted liquid container; LED light bars are respectively installed on the two side ends of the light guide plate; the two side ends of the light guide plate with the LED light bar installed are fixed in the two opposite groups of card slots in the polluted liquid container; ultrasonic decontaminants are installed between the adjacent groups of card slots on the same container wall in the polluted liquid container, and between the four groups of card slots on the edge and the container wall parallel to them. The LED photocatalytic reactor of this invention has high photocatalytic efficiency and good catalytic effect. However, the patent has the problem that some photogenerated electrons and holes recombine and disappear during the transmission process to the solid-liquid interface, losing the catalytic effect and the photocatalytic efficiency is low. In addition, the patent only uses the catalysts on several light guide plates to purify wastewater, the purification efficiency is limited, and the large particles of impurities in the wastewater will scratch the light guide plate, shortening the service life of the light guide plate. Moreover, the heat dissipation effect of the light guide plate in the patent is poor. Summary of the invention

[0005] In view of this, the object of the present invention is to provide an LED photoelectric catalytic reactor, which has the functions of pre-filtering and pre-purifying wastewater, improving the wastewater purification effect, and extending the service life of the light guide plate.

[0006] The invention has a long service life and a high photocatalytic effect, so as to solve the problems mentioned in the above background technology.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts such a technical scheme: an LED photoelectric catalytic reactor, comprising a reaction box, wherein two opposite inner side walls of the reaction box are respectively provided with a plurality of groups of symmetrical and evenly distributed fixing clamps, wherein the plurality of groups of fixing clamps are respectively inserted with a plurality of parallel and evenly spaced light guide components, wherein the light guide component comprises a light guide plate, a first fixing component installed on two opposite sides of the light guide plate, and a second fixing component installed on the other two opposite sides of the light guide plate; the second fixing component is provided with a mounting groove, a light source is provided at the bottom of the mounting groove, and the inner surface of the mounting groove is silver-plated to form a U-shaped reflecting mirror surface; the two ends of the light guide component equipped with the light source are inserted into the fixing clamps; the two outer light emitting surfaces of the light guide plate are provided with a plurality of evenly distributed convex strips and convex dots, and are plated with an ITO transparent conductive film connected on both sides, and a plurality of parallel and evenly spaced light guide components are provided. The vertically arranged light guide plates are divided into two groups, an odd group and an even group, according to the arrangement order, and the ITO transparent conductive films on the two groups of light guide plates are respectively connected to the positive and negative electrodes of the DC bias power supply through leads; a circuit cavity is arranged on the top of the reaction box, and the DC bias power supply is arranged in the circuit cavity; a pretreatment cavity is arranged on the top of the circuit cavity, and a pretreatment tube with a serpentine structure is provided inside the pretreatment cavity, and the pretreatment tube is made of light-guiding material, and its inner wall is coated with a photocatalyst coating; the pretreatment cavity is provided with two or more light strips for irradiating the pretreatment tube; the two ends of the pretreatment tube are respectively connected with a wastewater inlet section that penetrates the top of the pretreatment cavity upwards and a wastewater outlet section that penetrates the circuit cavity downwards to the reaction box; a filter is arranged on one side of the reaction box, and the output end of the filter is connected with the wastewater inlet section through a wastewater delivery pipe.

[0008] Further, the filter includes a filter cavity, the filter cavity is provided with a partition, the filter cavity is divided into an upper cavity and a lower cavity, the upper cavity is provided with a bowl-shaped filter screen, which opens downward, the filter cavity is penetrated from bottom to top by a wastewater inlet pipe, and the top of the wastewater inlet pipe is located below the filter screen; the partition is provided with a through hole, and a slag receiving container is provided below the through hole, the slag receiving container is arranged around the outside of the wastewater inlet pipe, and the bottom of the slag receiving container is connected to a slag discharge pipe, and the slag discharge pipe penetrates the bottom of the filter cavity and is connected to an end cover.

[0009] Furthermore, the opening of the filter screen is provided with a connecting outer edge; a locking plate is provided above the partition, a circular hole is provided in the middle of the locking plate, and the connecting outer edge is connected to the circular hole by a thread.

[0010] Furthermore, the slag receiving container includes an inner cylinder with a hollow structure and an outer cylinder with a hollow structure, and the inner cylinder and the outer cylinder are coaxial; a plurality of fixing rods are connected at intervals between the tops of the inner cylinder and the outer cylinder; the wastewater inlet pipe is arranged inside the inner cylinder, and the bottoms of the inner cylinder and the outer cylinder are connected to each other in a structure inclined to one side or in a spiral structure, and the slag discharge pipe is arranged at the lowest end of the bottom of the slag receiving container.

[0011] Furthermore, the interior of the light guide plate is configured as a hollow structure with upper and lower openings, the first fixing member is provided with a plurality of holes connected to the hollow structure of the light guide plate at intervals, and the side walls of the hollow structure are provided with an ITO transparent conductive film and a photocatalyst.

[0012] Furthermore, two opposite side walls of the hollow structure are respectively provided with a plurality of light guide columns staggered with each other, and the outer ends of the light guide columns are free ends.

[0013] Furthermore, the light guide column is a hollow cylinder, and a side wall thereof is provided with a plurality of hollow portions of long strip structures.

[0014] Furthermore, the pretreatment chamber includes two fixed plates arranged in an upper and lower position, and the two fixed plates are respectively integrally formed with an upper half tube and a lower half tube, the bottom of the upper half tube is provided with a convex column consistent with its contour, and the top of the lower half tube is provided with a sealing groove adapted to be plugged and connected with the convex column, and the inner side wall of the sealing groove is provided with a rubber pad, wherein the two fixed plates are fixed together by a fixing bolt assembly.

[0015] Furthermore, the top end of the upper half tube and the bottom end of the lower half tube are respectively provided with a plurality of support plates arranged in a straight line or a support plate arranged in a serpentine structure, the light bar is arranged in a serpentine structure between the plurality of support plates in a straight line, or a plurality of the light bars are arranged on both sides of the straight part of the support plate in a serpentine structure; or the fixed plate is provided with a plurality of support plates arranged at intervals, and the light bar is arranged in a serpentine structure above the top of the upper half tube and below the bottom of the lower half tube; the top and bottom of the pretreatment chamber are respectively provided with grooves adapted to be plugged and connected with the support plates.

[0016] Furthermore, the convex strips are one or more of a wavy structure, a circular structure, and an elliptical structure. Beneficial Effects

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] 1. The setting of convex strips and convex points increases the contact area between the light guide plate and the wastewater, improves the scope of the photocatalytic reaction, and makes the photocatalyst receive more uniform light.

[0019] 2. The cooperation of the hollow structure light guide plate, light guide column and hollow part can enhance the heat dissipation of the light guide plate on the one hand, and improve the photocatalytic effect of the light guide plate in treating wastewater on the other hand.

[0020] 3. Use a DC bias power supply to generate an electric field in the photocatalyst to separate the photogenerated holes and electrons in the photocatalyst, reduce the recombination of photogenerated electrons and holes, and improve the photocatalytic efficiency.

[0021] 4. The setting of the pretreatment chamber can pre-decompose some pollutants in the wastewater, further ensuring the effect of wastewater treatment. The pretreatment pipe with a serpentine structure in the pretreatment chamber can extend the path of wastewater entering the reaction box and increase the time for the pretreatment chamber to decompose pollutants.

[0022] 5. The filter filters out large particles of impurities in the wastewater, reduces the damage of large particles of impurities to the light guide plate, and extends the life of the light guide plate.

[0023] 6. The pretreatment pipe is configured with a structure in which the upper half pipe and the lower half pipe are detachably connected, so that impurities deposited on the surface of the pretreatment pipe can be easily cleaned, so that the pretreatment pipe can restore its sewage treatment function and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a schematic diagram of the internal structure of the reaction box, circuit chamber and pretreatment chamber of the present invention.

[0026] Figure 3 This is a top view of the interior of the pretreatment chamber of the present invention.

[0027] Figure 4 It is a structural schematic diagram of an implementation manner of the outer surface of the light guide plate of the present invention.

[0028] Figure 5 It is a schematic structural diagram of a transverse cross section of the light guide plate of the present invention.

[0029] Figure 6 It is a schematic structural diagram of an implementation scheme of the light guide column inside the light guide plate of the present invention.

[0030] Figure 7 It is a schematic structural diagram of another implementation scheme of the light guide column inside the light guide plate of the present invention.

[0031] Figure 8 It is a structural schematic diagram of another embodiment of the outer surface of the light guide plate of the present invention.

[0032] Fig. 9 It is a structural schematic diagram of another embodiment of the outer surface of the light guide plate of the present invention.

[0033] Fig.10 It is a schematic structural diagram of another embodiment of the pretreatment chamber of the present invention.

[0034] Fig.11 for Fig.10 Structural relationship diagram of the pre-treatment tube, light bar and support column.

[0035] Fig.12 It is a schematic structural diagram of another embodiment of the pretreatment chamber of the present invention.

[0036] Fig.13 for Fig.12 A structural relationship diagram of the pretreatment tube, light bar and support column.

[0037] Fig.14 for Fig.12 Another structural relationship diagram of the pretreatment tube, light bar and support column.

[0038] Fig.15 for Fig.12 Schematic diagram of the local enlarged structure.

[0039] Fig.16 It is a schematic diagram of the structure of the filter of the present invention.

[0040] Fig.17 It is a schematic structural diagram of an embodiment of a slag container in a filter of the present invention.

[0041] Fig.18 It is a schematic structural diagram of another embodiment of the slag container in the filter of the present invention.

[0042] Fig.19 It is a schematic structural diagram of the light guide assembly of the present invention.

[0043] Fig. 20 It is a schematic structural diagram of the second fixing member of the light guide assembly of the present invention.

[0044] Fig.21 It is a schematic structural diagram of an implementation scheme of the first fixing member of the light guide assembly of the present invention.

[0045] Fig. 22 It is a schematic structural diagram of another implementation scheme of the first fixing member of the light guide assembly of the present invention.

[0046] Fig.23 It is a schematic structural diagram of the connection between the first fixing member and the second fixing member of the present invention.

[0047] Fig.24It is a schematic structural diagram of the lower clamping block and the upper guide block of the present invention.

[0048] Figure numerals: 1, reaction box; 2-circuit chamber; 3-pretreatment chamber; 4-filter; 40-filter chamber; 400-upper cover; 401-chamber; 402-lower cover; 41-upper chamber; 42-lower chamber; 43-filter screen; 430-bowl bottom; 431-filter hole; 432-connection outer edge; 433-locking plate; 44-partition plate; 440-through hole; 45-slag receiving container; 450-connection Slag hole; 451-fixing rod; 452-inner cylinder; 453-outer cylinder; 454-bottom plate; 5-wastewater inlet pipe; 6-wastewater conveying pipe; 7-slag discharge pipe; 70-cover; 8-touch screen; 9-pretreatment pipe; 90-inlet; 91-outlet; 92-upper half pipe; 920-convex column; 93-lower half pipe; 930-sealing groove; 94-sealing pad; 95-fixing bolt assembly; 96 -fixing plate; 10-wastewater inlet section; 11-wastewater outlet section; 12-controller; 13-light guide assembly; 130-light guide plate; 131-convex strip; 132-convex point; 133-light guide column; 134-hollow portion; 135-first fixing member; 1350-card slot; 1351-hole; 1352-connecting plate; 136-second fixing member; 1360-installation slot; 1361-connecting Connecting groove; 1362-threading hole; 14-lower clamping block; 15-upper guide block; 16-wastewater outlet; 17-light bar; 18-upper light bar; 19-lower light bar; 20-upper cover; 21-lower cover; 22-groove; 23-support plate; 24-upper periphery; 25-lower periphery; 26-heat sink; 27-card; 28-light source; 29-electrical connecting wire; 30-wire hole; 31-fixing groove. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the present invention clearer, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0050] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to an element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. Embodiment 1

[0052] See also Figure 1-Figure 9 as well as Figure 16-Figure 24 This embodiment provides an LED photoelectrocatalytic reactor, including a reaction box 1, wherein two opposite inner side walls of the reaction box 1 are respectively provided with a plurality of sets of symmetrical and evenly distributed fixing clamps, wherein the fixing clamps include an upper guide block 15 and a lower clamp block 14. The plurality of fixing clamps are respectively inserted with a plurality of parallel and equally spaced light guide components 13, wherein the light guide component 13 includes a light guide plate 130, a first fixing component 135 installed on two opposite sides of the light guide plate 130, and a second fixing component 136 installed on the other two opposite sides of the light guide plate 130. Fig. 20 As shown, the second fixing member 136 is provided with a mounting groove 1360, and a light source 28 is arranged at the bottom of the mounting groove 1360. The inner surface of the mounting groove 1360 is silver-plated to form a U-shaped reflective mirror. It should be noted that the light source 28 is an LED light bar, which includes a plurality of LED chips and a PCB board. The light source 28 is bonded to the bottom of the mounting groove 1360 by a heat-conducting adhesive. The two side ends of the light guide plate 130 are respectively inserted into the mounting grooves 1360 of the two second fixing members 136, and the end of the second fixing member 136 is provided with a threading hole for passing the electrical connection line 29 of the light source 28. Fig.21 As shown, the first fixing member 135 is provided with a card slot 1350, and the other two side ends of the light guide plate 130 are respectively inserted into the card slot 1350 of the first fixing member 135. The outer side walls at both ends of the first fixing member 135 are respectively extended with connecting plates 1352, and the connecting plates 1352 are used to connect to the connecting grooves 1361 provided on the outer side walls at both ends of the second fixing member 136. The connecting parts of the first fixing member 135 and the second fixing member 136 are fixed by welding. A gap is left between the side end of the light guide plate 130 and the bottom of the mounting groove 1360 bonded with the light source 28 for mirror reflection and optical coupling. The two ends of the light guide component with the light source 28 installed are inserted into the fixing card.

[0053] The two outer light-emitting surfaces of the light guide plate 130 are provided with a plurality of evenly distributed convex strips 131 and convex points 132, wherein the convex strips 131 are one or more of a wave-shaped structure, a circular structure, and an elliptical structure. The provision of the convex strips 131 and the convex points 132, on the one hand, increases the contact area between the light guide plate 130 and the wastewater, thereby increasing the scope of occurrence of the photocatalytic reaction; on the other hand, it enhances the diffuse reflection of light, thereby making the photocatalyst receive more uniform illumination; on the other hand, it also causes disturbance of the water flow, thereby helping the pollutants in the wastewater to better contact with the photocatalyst, thereby improving the wastewater purification treatment effect, and also allowing the impurities in the wastewater to be carried away by the force of the water flow, thereby making it difficult for them to precipitate on the surface of the light guide plate 130. The two outer light-emitting surfaces of the light guide plate 130 are plated with ITO transparent conductive films that are connected on both sides. A plurality of parallel and equidistant vertically arranged light guide plates 130 are divided into two groups, an odd array and an even array, according to the arrangement order. The ITO transparent conductive films on the two groups of light guide plates 130 are respectively connected to the positive and negative electrodes of the DC bias power supply through leads, thereby generating a DC bias electric field between adjacent light guide plates 130. Among them, the connection structure of the lead is: the ITO transparent conductive film is bonded to a thin copper plate through silver glue, the thin copper plate is connected to the lead, and the connection part between the thin copper plate and the lead is bonded with an adhesive material that plays a waterproof sealing and fixing role. When the light guide plate 130 is used, a photocatalyst with a specific absorption wavelength is coated on the surface of the ITO transparent conductive film. The DC bias electric field will separate the photogenerated holes and photogenerated electrons in the photocatalyst, and the solid and liquid surfaces of the two groups of light guide plates 130 connected to the positive and negative electrodes of the DC bias power supply will respectively gather the photogenerated holes and photogenerated electrons, and react with the donors or acceptors in the wastewater to play a catalytic role; and the corresponding photogenerated electrons and photogenerated holes of each group of light guide plates 130 will reach the positive and negative electrodes of the DC bias power supply respectively through the external circuit, and participate in the subsequent cycle under the action of the DC bias power supply.

[0054] It should be noted that the present invention discloses a photoelectrocatalytic reactor, which does not involve specific photocatalysts and LED emission wavelengths. Users can apply photocatalysts with specific absorption wavelengths on the ITO surface of the light guide plate 130 as needed, and match them with LEDs with corresponding emission wavelengths.

[0055] In other embodiments, the interior of the light guide plate 130 is configured as a hollow structure with upper and lower openings. The hollow structure can effectively reduce the amount of material used, thereby reducing the weight of the light guide plate 130. On the other hand, the hollow structure is conducive to the diffusion of heat from the light guide plate 130, which is conducive to reducing the temperature of the light guide plate 130 and improving the working stability and service life of the light guide plate 130. Fig. 22As shown, the first fixing member 135 is provided with two spaced slots 1350 on one side facing the light guide plate 130, which are used to clamp the two side walls of the hollow structure of the light guide plate 130, and a plurality of holes 1351 connected to the hollow structure of the light guide plate 130 are spaced between the two slots 1350. The outer side walls at both ends of the first fixing member 135 are respectively extended with connecting plates 1352, and the connecting plates 1352 are used to connect to the connecting grooves 1361 provided on the outer side walls at both ends of the second fixing member 136. The connecting parts of the first fixing member 135 and the second fixing member 136 are fixed by welding. The side wall of the hollow structure is provided with an ITO transparent conductive film, and a photocatalyst is coated on the surface of the ITO transparent conductive film, so that the inside of the light guide plate 130 has a wastewater treatment function, thereby improving the efficiency of wastewater treatment.

[0056] Furthermore, if Figure 2 and Fig.19 As shown, a heat sink 26 is provided between the holes of the first fixing member 135 at the bottom, and the heat sink 26 is located on the outer side of the first fixing member 135, and is used to improve the heat dissipation of the light guide plate 130. Preferably, the two side walls at the bottom of the heat sink 26 are respectively connected with an arc-shaped elastic card 27, and the bottom of the reaction box 1 is provided with a fixing groove 31 corresponding to the heat sink 26. The heat sink 26 is inserted into the fixing groove, and is in close contact with the reaction box 1 through the card 27, so that part of the heat is transferred to the reaction box 1 for heat dissipation, and the heat dissipation effect of the light guide plate 130 is further improved.

[0057] Furthermore, two opposite side walls of the hollow structure are respectively provided with a plurality of light guide columns 133 interlaced with each other, and the outer ends of the light guide columns 133 are free ends. The surface of the light guide column 133 is provided with an ITO transparent conductive film, and a photocatalyst is coated on the surface of the ITO transparent conductive film. The interlaced light guide columns 133 increase the contact area between the light guide plate 130 and the wastewater, effectively preventing the light guide plate 130 from overheating and affecting the photocatalytic reaction and its own performance, and can disturb the flow of wastewater, increase the heat dissipation effect, and in addition, can enhance the photocatalytic effect, and increase the amount of wastewater pollutants that can be treated per unit time.

[0058] Preferably, the light guide column 133 is a hollow cylinder, and its side wall is provided with a plurality of hollow portions 134 of a long strip structure. The plurality of hollow portions 134 are arranged around the outer side of the hollow cylinder. The strip-shaped hollow portions 134 cause the local water flow to change in form, produce a certain disturbance effect, help to flush the outer surface of the light guide column, prevent impurities from gathering and precipitating around the light guide column, and help to improve the heat dissipation effect.

[0059] It should be noted that in the technical solution of this embodiment, the two outer surfaces of the light guide plate 130, the inner wall of the hollow structure of the light guide plate 130 and the ITO transparent conductive film provided on the light guide column 133 are all connected.

[0060] In the technical solution of this embodiment, silicone structural adhesive glue is used to bond the connecting gaps between the light guide plate 130 and the first fixing member 135 and the second fixing member 136, the connecting gaps between the first fixing member 135 and the second fixing member 136, and the gaps between the electrical connecting wire 29 and the lead wire and the threading hole 1362, so as to achieve waterproof and fixing effects.

[0061] A circuit cavity 2 is provided on the top of the reaction box 1, and the DC bias power supply is provided in the circuit cavity 2; the driving power supply of the light source 28 is also provided in the circuit cavity 2, and a controller is provided in the circuit cavity 2, and the side wall of the circuit cavity 2 is provided with heat dissipation holes and a touch display screen 8. The electrical connection wires of the light source 28 and the leads of the ITO transparent conductive film pass upward through the threading holes 1362 of the second fixing member 136, and pass into the circuit cavity 2 through the wire holes 30 provided at the bottom of the circuit cavity 2, and are connected to the driving power supply and the DC bias power supply respectively. The wire holes 30 are bonded to the gaps between the electrical connection wires and the leads by organic silicone structural bonding glue.

[0062] A pretreatment chamber 3 is arranged at the top of the circuit chamber 2. A pretreatment tube 9 with a serpentine structure is arranged inside the pretreatment chamber 3. The pretreatment tube 9 is made of a transparent light-guiding material, and its inner wall is coated with a photocatalyst coating. The pretreatment chamber 3 is provided with two or more light bars 17 for irradiating the pretreatment tube. The light bar 17 is an LED light bar. In this embodiment, the pretreatment tube 9 is an integrally formed pipe. The electrical connection line of the light bar 17 runs downward to the circuit chamber 2 and is connected to a driving power supply. The two ends of the pretreatment tube 9 are respectively connected with a wastewater inlet section 10 that runs upward through the top of the pretreatment chamber 3 and a wastewater outlet section 11 that runs downward through the circuit chamber 2 to the reaction box 1; a filter 4 is arranged on one side of the reaction box 1 for filtering large particles of impurities in the wastewater, reducing the damage of large particles of impurities to the light guide plate, and extending the life of the light guide plate. The output end of the filter 4 is connected to the wastewater inlet section 10 through the wastewater delivery pipe 6.

[0063] In the technical solution of this embodiment, the filter 4 includes a filter cavity 40, and the filter cavity 40 is provided with a partition 44, which divides the filter cavity 40 into an upper cavity 41 and a lower cavity 42. The upper cavity 41 is provided with a bowl-shaped filter screen 43, which opens downward, and the filter holes 431 of the filter screen 43 are arranged on the side wall except the bowl bottom 430. The filter cavity 40 is penetrated by a wastewater inlet pipe 5 from bottom to top, and the top of the wastewater inlet pipe 5 is located below the bowl bottom 430 of the filter screen 43; the partition 44 is provided with a through hole 440, and a slag receiving container 45 located in the lower cavity 42 is arranged below the through hole 440, and the slag receiving container 45 is arranged around the outside of the wastewater inlet pipe 5, and the top of the slag receiving container 45 is fixed on the partition 44, and the bottom of the slag receiving container 45 is connected with a slag discharge pipe 7, and the slag discharge pipe 7 penetrates the bottom of the filter cavity 40 and is threadedly connected with a cover 70.

[0064] Furthermore, the slag receiving container 45 comprises a hollow inner cylinder 452 and a hollow outer cylinder 453, wherein the inner cylinder 452 and the outer cylinder 453 are coaxial; a plurality of fixing rods 451 are connected at intervals between the tops of the inner cylinder 452 and the outer cylinder 453; and the wastewater inlet pipe 5 is disposed inside the inner cylinder 452 and connected to the inner cylinder 452. Fig.17 As shown, the bottom of the inner cylinder 452 and the outer cylinder 453 are connected, so that the bottom of the slag receiving container 45 presents a structure inclined to one side, and its bottom is set as a bottom plate 454, and the slag discharge pipe 7 is set at the lowest end of the bottom plate 454. In another embodiment, the inner cylinder 452 and the outer cylinder 453 are connected, and their bottoms are connected and set as a bottom plate 454, so that the bottom connection of the slag receiving container 45 is a spiral structure, and the slag discharge pipe 7 is set at the lowest end of the spiral structure. The longitudinal cross-section of the bottom plate 454 is an arc-shaped structure. The impurities filtered out by the filter 43 fall into the slag receiving container 45 through the top opening of the slag receiving container 45. The bottom structure of the slag receiving container 45 facilitates the impurities to slide toward the slag discharge pipe 7. The impurities can be discharged by opening the cover 70.

[0065] Preferably, the filter cavity 40 is composed of an upper cover 400, a lower cover 402 and a cavity 401. A partition 44 is arranged inside the cavity 401. The opening of the filter screen 43 is provided with a connecting outer edge 432 of an annular structure, and the outer side surface of the connecting outer edge 432 is provided with an external thread; a locking plate 433 is provided above the partition 44, and a circular hole is provided in the middle of the locking plate 433, and an internal thread is provided on the inner wall of the circular hole; the connecting outer edge 432 is connected to the circular hole by threads.

[0066] In the technical solution of this embodiment, the controller 12 is connected to a DC bias power supply, a driving power supply and a touch display screen 8. The controller 12 controls the driving power supply to adjust the intensity, opening and closing time of the light source 28. The efficiency of the photocatalytic reaction is adjusted by controlling the intensity of the light source. The controller 12 controls the DC bias power supply, adjusts its output voltage and current, changes the electric field strength and charge distribution on the surface of the ITO transparent conductive film, and can improve the effect of the ITO transparent conductive film in the treatment of wastewater. Through the touch display screen 8, the user can intuitively see the operating status of the system, including the working status of the light source and the electrical parameters of the conductive film. At the same time, the user can input instructions through the touch display screen to adjust the output of the controller 12, realize manual intervention in the wastewater treatment process, and make the wastewater treatment more controllable.

[0067] Preferably, in this embodiment, a pH sensor and a water quality sensor are installed near the wastewater outlet and / or in the middle of the reaction box, and the pH sensor and the water quality sensor are electrically connected to the controller 12.

[0068] The pH sensor sends the pH value data of the monitored wastewater to the controller 12, and the controller 12 compares and analyzes the monitoring data with the preset pH value range. If the pH sensor detects that the pH value deviates from the optimal range preset by the controller 12, the controller 12 receives the feedback signal of the pH sensor and adjusts the voltage of the ITO transparent conductive film or the working mode of the light source 28 to stabilize the pH value of the wastewater. If the pH value drops, the controller 12 controls the light source to reduce its intensity, reduce the efficiency of the photocatalytic reaction, and slow down the production of acidic substances. For the ITO transparent conductive film, the controller 12 can reduce its voltage to reduce the electrochemical oxidation reaction that causes the increase of acidic substances. On the contrary, if the pH value rises, the controller 12 appropriately increases the intensity of the light source, accelerates the photocatalytic reaction, and reduces the pH value, or adjusts the voltage of the ITO transparent conductive film to enhance the electrochemical process that can produce acidic substances, so that the pH value falls back to the appropriate range.

[0069] The water quality sensor monitors the water quality parameters in real time and transmits the data to the controller 12. The controller 12 analyzes the received data according to the preset water quality standard. If the water quality does not meet the standard, the controller issues a command to adjust the light source intensity and / or conductive film parameters, such as increasing the light source intensity to enhance the catalytic effect of the photocatalyst or increasing the voltage of the ITO transparent conductive film to speed up the chemical reaction process and adjust the water quality. The water quality monitoring sensor continuously monitors and feeds back new data to the controller, and the cycle continues, so that the water quality continues to approach and meet the standard.

[0070] Working principle: wastewater enters the filter 4 from the wastewater inlet pipe 5, and after filtering out large particles of impurities, it is input into the pretreatment pipe 9 through the wastewater delivery pipe 6. The light of the light bar irradiates the photocatalyst of the pretreatment pipe 9, causing it to generate photogenerated holes and photogenerated electrons, which react with the donors or acceptors in the wastewater to play a catalytic role, pre-treating the wastewater flowing through the pretreatment pipe 9 and decomposing some pollutants in the wastewater. The wastewater discharged from the pretreatment pipe 9 flows into the reaction box 1, and the light generated by the light source 28 is coupled into the light guide plate 130 through the side end of the light guide plate 130. The light coupled into the light guide plate 130 is modulated by the convex strips and convex points on the outer light-emitting surface of the light guide plate 130, so that the light guide plate 130 emits light evenly on both sides. Multiple light guide plates 130 are divided into two groups of odd and even groups according to the arrangement order. The ITO transparent conductive films on the two groups of light guide plates 130 are connected to the positive and negative electrodes of the DC bias power supply through leads, respectively, to generate a DC bias electric field between adjacent light guide plates 130. The DC bias electric field separates the photogenerated holes and electrons in the photocatalyst, and the solid-liquid surfaces of the two groups of light guide plates connected to the positive and negative electrodes of the DC bias power supply respectively gather the photogenerated holes and photogenerated electrons, and react with the donors or acceptors in the wastewater to play a catalytic role; and the photogenerated electrons and photogenerated holes corresponding to each group of light guide plates reach the positive and negative electrodes of the DC bias power supply respectively through the external circuit, and participate in the subsequent cycle under the action of the DC bias power supply. The photoelectrocatalytic reactor of the present invention avoids the problem that some photogenerated electrons and holes in the traditional photocatalytic reactor recombine and disappear during the transmission process to the solid-liquid interface, lose the catalytic effect, and have low photocatalytic efficiency. Embodiment 2

[0071] The remaining components are the same as those in Example 1 and will not be described one by one here; the difference from Example 1 is that the structure of the pretreatment chamber 3 is different. The pretreatment chamber 3 of this embodiment includes an upper cover plate 20, a lower cover plate 21, an upper outer periphery 24, a lower outer periphery 25, and two fixing plates 96. In order to facilitate the cleaning of the pretreatment tube 9, the two upper and lower fixing plates 96 are respectively integrally formed with an upper half tube 92 and a lower half tube 93, and the upper fixing plate 96, the lower fixing plate 96, the upper half tube 92 and the lower half tube 93 are all made of transparent light-guiding material. Fig.15As shown, the bottom of the upper half pipe 92 is provided with a boss 920 consistent with its profile, and the top of the lower half pipe 93 is provided with a sealing groove 930 adapted to be inserted and connected with the boss 920, and the inner wall of the sealing groove 930 is provided with a rubber pad, wherein the two fixing plates 96 are fixed together by a fixing bolt assembly 95. The fixing bolt assembly 95 includes a bolt and a nut, and the contact parts of the bolt and the nut with the fixing plate are provided with a protective pad made of elastic material. Preferably, a sealing pad 94 is provided between the two fixing plates 96. The upper and lower fixing plates 96 are respectively fixed to the upper periphery 24 and the lower periphery 25 by bolts or adhesive. The upper cover plate 20 and the lower cover plate 21 are respectively fixedly connected to the upper periphery 24 and the lower periphery 25 by bolts. The lower cover plate 21 is connected to the top of the circuit cavity 2 by bolts. The inlet 90 provided at the top of one end of the upper half pipe 92 is connected to the wastewater inlet section 10, and the outlet 91 provided at the bottom of the opposite end of the lower half pipe 93 is connected to the wastewater outlet section 11.

[0072] like Figure 10-11 The fixing plate 96 is provided with a plurality of support plates 23 arranged at intervals, and the light bar includes an upper light bar 18 and a lower light bar 19, which are respectively located above the top of the upper half tube 92 and below the bottom of the lower half tube 93 in a serpentine structure; the top and bottom of the pretreatment chamber 3 are respectively provided with grooves 22 adapted to be plugged and connected with the support plates 23, and an elastic pad is provided at the bottom of the groove 22.

[0073] like Figure 12-13 The top of the upper half tube 92 and the bottom of the lower half tube 93 are respectively provided with a support plate 23 arranged in a serpentine structure, and the light bar includes an upper light bar 18 and a lower light bar 19. A plurality of upper light bars 18 and lower light bars 19 are respectively arranged on both sides of the straight part of the serpentine structure support plate 23; the top and bottom of the pretreatment chamber 3 are respectively provided with grooves 22 adapted to be plugged and connected with the support plate 23, and an elastic pad is arranged at the bottom of the groove 22. In other embodiments, as Fig.12 and Fig.14 As shown, the top of the upper half tube 92 and the bottom of the lower half tube 93 are respectively provided with a plurality of support plates 23 arranged in a straight line, and the upper light bar 18 and the lower light bar 19 are respectively arranged in a serpentine structure between the plurality of support plates 23 in a straight line structure. The top and bottom of the pretreatment chamber are respectively provided with grooves 22 adapted to be plugged and connected with the support plates 23, and an elastic pad is provided at the bottom of the grooves 22.

[0074] Preferably, the support plate 23 is made of a transparent light-guiding material and is integrally formed with the fixing plate 96 .

[0075] Preferably, a plurality of protrusions are evenly provided on the inner walls of the upper half tube 92 and the lower half tube 93. The protrusions are one or more of circular, elliptical, and elongated shapes, which disturb the water flow and allow the wastewater to more fully contact the photocatalyst, thereby achieving better wastewater treatment effects.

[0076] It should be noted that the electrical connection wires of the upper light bar 18 and the lower light bar 19 pass through the circuit cavity 2 and are connected to a driving power source, which is electrically connected to the controller 12 .

[0077] The technical solution of this embodiment sets the pretreatment pipe 9 as a structure in which the upper half pipe 92 and the lower half pipe 93 are detachably connected, which can facilitate cleaning of impurities deposited on the surface of the pretreatment pipe 9 and restore the function and effect of the pretreatment pipe 9 to treat sewage.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An LED photoelectrocatalytic reactor, characterized in that: It comprises a reaction box, wherein two opposite inner side walls of the reaction box are respectively provided with a plurality of groups of symmetrical and evenly distributed fixing clamps, wherein the plurality of groups of fixing clamps are respectively inserted with a plurality of light guide components arranged in parallel and at equal intervals, wherein the light guide component comprises a light guide plate, a first fixing component installed on two opposite sides of the light guide plate, and a second fixing component installed on the other two opposite sides of the light guide plate; the second fixing component is provided with a mounting groove, a light source is arranged at the bottom of the mounting groove, and the inner surface of the mounting groove is silver-plated to form a U-shaped reflecting mirror surface; the two ends of the light guide component with the light source installed are inserted into the fixing clamps; the two outer luminous surfaces of the light guide plate are provided with a plurality of evenly distributed convex strips and convex dots, and are plated with an ITO transparent conductive film connected on both sides, and a plurality of parallel and equidistant vertically arranged light guide plates are divided into an odd group and an even group according to the arrangement order, and the ITO transparent conductive films on the two groups of light guide plates are respectively connected to the positive and negative electrodes of a DC bias power supply through leads; a circuit cavity is provided on the top of the reaction box, and the DC bias power supply is arranged in the circuit cavity; a pretreatment cavity is provided on the top of the circuit cavity, and the pretreatment A pretreatment tube with a serpentine structure is provided inside the cavity, the pretreatment tube is made of a light-guiding material, and its inner wall is coated with a photocatalyst coating; the pretreatment cavity is provided with two or more light bars for irradiating the pretreatment tube; the two ends of the pretreatment tube are respectively connected with a wastewater inlet section that passes through the top of the pretreatment cavity upwards and a wastewater outlet section that passes through the circuit cavity downwards to the reaction box; a filter is provided on one side of the reaction box, and the output end of the filter is connected to the wastewater inlet section through a wastewater delivery pipe; the filter includes a filter cavity, the The filter cavity is provided with a partition, which divides the filter cavity into an upper cavity and a lower cavity. The upper cavity is provided with a bowl-shaped filter screen, which opens downward. A wastewater inlet pipe is provided through the filter cavity from bottom to top, and the top of the wastewater inlet pipe is located below the filter screen; the partition is provided with a through hole, and a slag receiving container is provided below the through hole. The slag receiving container is arranged around the outside of the wastewater inlet pipe, and the bottom of the slag receiving container is connected to a slag discharge pipe, which passes through the bottom of the filter cavity and is threadedly connected to a cover.

2. The LED photoelectrocatalytic reactor according to claim 1, characterized in that: The opening of the filter screen is provided with a connecting outer edge; a locking plate is provided above the partition plate, a circular hole is provided in the middle of the locking plate, and the connecting outer edge is connected to the circular hole through a thread.

3. The LED photoelectrocatalytic reactor according to claim 1, characterized in that: The slag receiving container includes an inner cylinder with a hollow structure and an outer cylinder with a hollow structure, and the inner cylinder and the outer cylinder are coaxial; a plurality of fixing rods are connected at intervals between the tops of the inner cylinder and the outer cylinder; the wastewater inlet pipe is arranged inside the inner cylinder, and the bottoms of the inner cylinder and the outer cylinder are connected to form a structure inclined to one side or a spiral structure, and the slag discharge pipe is arranged at the lowest end of the bottom of the slag receiving container.

4. The LED photoelectrocatalytic reactor according to claim 1, characterized in that: The interior of the light guide plate is arranged as a hollow structure with upper and lower openings, the first fixing member is arranged with a plurality of holes connected with the hollow structure of the light guide plate at intervals, and the side wall of the hollow structure is arranged with an ITO transparent conductive film and a photocatalyst.

5. The LED photoelectrocatalytic reactor according to claim 4, characterized in that: Two opposite side walls of the hollow structure are respectively provided with a plurality of light guide columns staggered with each other, and the outer ends of the light guide columns are free ends.

6. The LED photoelectrocatalytic reactor according to claim 5, characterized in that: The light guide column is a hollow cylinder, and a plurality of hollow parts with long strip structures are arranged on its side wall.

7. The LED photoelectrocatalytic reactor according to claim 1, characterized in that: The pretreatment chamber includes two fixed plates arranged in an upper and lower position, wherein the two fixed plates are respectively integrally formed with an upper half tube and a lower half tube, wherein a convex column consistent with the contour of the upper half tube is arranged at the bottom, and a sealing groove adapted to be plugged and connected with the convex column is arranged at the top of the lower half tube, and a rubber pad is arranged on the inner side wall of the sealing groove, wherein the two fixed plates are fixed together by a fixing bolt assembly.

8. The LED photoelectrocatalytic reactor according to claim 7, characterized in that: The top end of the upper half tube and the bottom end of the lower half tube are respectively provided with a plurality of support plates arranged in a straight line or a support plate arranged in a serpentine structure, the light bar is arranged in a serpentine structure between the plurality of support plates in a straight line, or a plurality of the light bars are arranged on both sides of the straight part of the support plate in a serpentine structure; or the fixed plate is provided with a plurality of support plates arranged at intervals, and the light bar is arranged in a serpentine structure above the top of the upper half tube and below the bottom of the lower half tube; the top and bottom of the pretreatment chamber are respectively provided with grooves adapted to be plugged and connected with the support plates.

9. The LED photoelectrocatalytic reactor according to claim 1, characterized in that: The convex strips are one or more of a wavy structure, a circular structure, and an elliptical structure.

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