Tubular photocatalytic reactor

Abstract

The utility model belongs to the technical field of photocatalytic water treatment devices, and discloses a tubular photocatalytic reactor which comprises a tubular shell, a photocatalytic reaction core plate which is vertically arranged and axially penetrates through the shell is arranged in the shell, two ends of the shell are fixedly connected with circular ring-shaped fixing parts, two ends of the reaction core plate are fixedly connected with circular ring-shaped limiting parts, and the circular ring-shaped limiting parts are fixedly connected with the shell. A plurality of irradiation windows are symmetrically formed in the outer wall of the shell, and light-transmitting plates and LED light source lamp strips are arranged on the irradiation windows; according to the utility model, the interior of the shell is separated along the axis by adopting the vertical reaction core plate, and the double-light-source arrangement of natural light and the LED light source lamp strip is adopted, so that the reaction core plate can be better illuminated and contacted with reactants, the photocatalytic efficiency is improved, the water purification effect is improved, the light-transmitting plate has a certain convergence effect on light, the reaction core plate can be conveniently irradiated, and the water purification effect is improved. By arranging the fixing piece and the limiting piece, the reaction core plate is convenient to fix, disassemble and assemble, and the reactor is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to a tubular photocatalytic reactor and belongs to the technical field of photocatalytic water treatment devices. Background Art

[0002] Photocatalytic water purification technology is a new type of sewage treatment method developed in recent years. Compared with traditional water purification technology, this technology can oxidize and decompose organic pollutants in water instead of physical adsorption, and will not cause secondary pollution. Therefore, it has good application prospects in the field of sewage treatment.

[0003] At present, photocatalytic reactors can use external light sources or built-in light sources; the built-in light source has a higher irradiation efficiency, but requires a structure to support the light source, and the internal structure of the reactor is relatively complex. The built-in light source is mostly a UV lamp tube set in the center of the reactor. The lamp cover outside the UV lamp tube is prone to scaling, which affects the irradiation effect and requires frequent cleaning. At the same time, some reactors are also equipped with a stirring device. Under strong stirring, the lamp tube is easy to loosen and break, increasing the cost of use and maintenance; the installation of an external light source is relatively simple, and its illumination is achieved by using a transparent reactor or setting a window, but the utilization efficiency of light energy is not high. In order to improve the utilization efficiency of light energy, the operation of some reactors with external light sources is to use a transparent reactor shell to mix the photocatalyst and sewage together and pass them through the reactor. Although this improves the efficiency of illumination, the subsequent separation of the catalyst is more difficult because the catalyst is mixed in the slurry.

[0004] Therefore, there is a need for a tubular photocatalytic reactor which has no built-in light source, a simple structure and is convenient for catalyst recovery. Utility Model Content

[0005] The utility model aims to provide a tubular photocatalytic reactor.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a tubular photocatalytic reactor, comprising a circular tubular shell, a reaction core plate loaded with a photocatalyst is arranged vertically inside the shell, the reaction core plate axially penetrates the shell, the two ends of the shell are respectively fixedly connected with circular ring-shaped fixing parts, the two ends of the reaction core plate are fixedly connected with circular ring-shaped limiting parts by bolts, the side of the circular ring-shaped fixing part away from the shell is provided with a limiting groove matched with the circular ring-shaped limiting part, the circular ring-shaped limiting part is slidably engaged in the limiting groove, a plurality of irradiation windows penetrating the side walls of the shell are axially opened on the outer walls on both sides of the shell, the irradiation windows are symmetrically arranged with the reaction core plate as the symmetry axis, a colorless and transparent light-transmitting plate is fixedly connected in the irradiation window, the light-transmitting plate is sealed and connected to the irradiation window, and an LED light source strip is arranged outside the irradiation window.

[0007] Preferably, the inner walls of the shell, the limiting groove and the annular limiting member are all smooth surfaces.

[0008] Preferably, the inner walls of the housing, the limiting groove and the annular limiting member are provided with a Teflon corrosion-resistant and non-stick layer.

[0009] Preferably, the shell is made of stainless steel, the circular fixing part and the circular limiting part are made of stainless steel or corrosion-resistant plastic, the light-transmitting plate is curved glass or acrylic plate, the outer wall of the shell is provided with reinforcing ribs, the circular fixing parts at both ends of the shell are respectively connected to the water inlet pipe and the water outlet pipe through flanges, the circular fixing part is provided with a flange screw hole that penetrates the circular fixing part from the thickness direction, and is fixedly connected to the flange by bolts, the circular fixing part is provided with a sealing ring groove on the side away from the shell and the outside of the limiting groove, and a rubber sealing ring is fixedly connected in the sealing ring groove.

[0010] Preferably, the reaction core plate comprises a rectangular support plate, and two side surfaces of the rectangular support plate are respectively fixedly connected with reaction membranes carrying photocatalysts, and the reaction membranes are fixed on the rectangular support plate by gluing or pressing with a hard thin mesh plate.

[0011] Preferably, the hard thin mesh plate is made of stainless steel or a steel material with a surface coated with Teflon corrosion-resistant non-stick coating.

[0012] Preferably, the reaction membrane is a flexible fiber cloth loaded with photocatalyst.

[0013] Preferably, the annular limiting member includes a limiting ring, the inner wall of the limiting ring is fixedly connected with a limiting vertical rod whose center is located at the center of the limiting ring, the limiting vertical rod is fixedly connected to the end of the reaction core plate by bolts, the outer wall of the limiting ring is fixedly connected with a positioning block, and the inner wall of the limiting groove is provided with a positioning groove that matches the positioning block.

[0014] Preferably, a plurality of rectangular through holes penetrating the rectangular support plate in the thickness direction are provided on the side surface of the rectangular support plate, and the shapes of the rectangular through holes can also be replaced by circular, elliptical, diamond-shaped holes, triangles, or pentagons to octagons.

[0015] Preferably, the rectangular support plate is a rectangular frame, and the reaction membrane is clamped by two hard thin mesh plates and fixedly connected in the rectangular frame.

[0016] Beneficial Effects

[0017] The tubular photocatalytic reactor of the utility model has a simple structure and is easy to maintain. A reaction core plate loaded with photocatalyst is vertically arranged to divide the interior of the shell into two left and right water purification areas along the axis line. A dual light source arrangement of natural light and an external LED light strip is adopted, so that the photocatalyst on the reaction core plate is better exposed to light and contacts the reactants, thereby improving the photocatalytic efficiency of the reactor and the effect of purifying water bodies. The photocatalyst is loaded on the reaction membrane of the reaction core plate, which is convenient for catalyst recovery. By arranging a light-transmitting plate, a certain light-gathering effect is achieved, so that the light irradiated into the reactor is better irradiated on the photocatalytic reaction membrane of the reaction core plate, thereby making better use of the light energy of the light source. The cooperation of the annular fixing member and the annular limiting member makes it convenient to fix and disassemble the reaction core plate, thereby facilitating the maintenance of the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the axial side structure in the utility model;

[0020] Figure 3 for Figure 2 A in the enlarged view;

[0021] Figure 4 This is a schematic diagram of the connection structure between the reactor and the inlet and outlet water pipes in the utility model;

[0022] Figure 5 It is a schematic diagram of the radial cross-section structure in the utility model;

[0023] Figure 6 It is a schematic diagram of the connection state of the reaction core plate and the annular limiting member in the utility model;

[0024] Figure 7 It is a structural schematic diagram of the circular ring-shaped fixing member in the utility model;

[0025] Figure 8 It is a side view structural schematic diagram of the circular ring-shaped fixing member in the utility model;

[0026] Fig. 9 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0027] Fig.10 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0028] Fig.11 It is a schematic diagram of the radial cross-sectional structure of the reactor when the LED light source strip is embedded in the irradiation window in the utility model.

[0029] In the figure: 1. tubular shell; 2. reaction core plate; 3. circular ring-shaped fixing part; 4. bolt; 5. circular ring-shaped limiting part; 6. limiting groove; 7. irradiation window; 8. light-transmitting plate; 9. LED light source strip; 10. flange; 11. water inlet pipe; 12. water outlet pipe; 13. flange screw hole; 15. rubber sealing ring; 16. rectangular support plate; 17. reaction membrane; 18. hard thin mesh plate; 19. limiting circular ring; 20. limiting vertical rod; 21. positioning block; 22. positioning groove; 23. rectangular through hole; 24. rectangular frame. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1:

[0032] like Figure 1-8 As shown, the utility model provides a technical solution: a tubular photocatalytic reactor, comprising a cylindrical shell 1, a vertical reaction core plate 2 loaded with a photocatalyst is arranged inside the shell 1, the photocatalyst in this embodiment is nano-scale titanium dioxide, the outer walls of the upper and lower ends of the reaction core plate 2 are slidably fitted with the inner wall of the shell 1, the reaction core plate 2 axially penetrates the shell 1, and divides the interior of the shell 1 into two left and right water purification areas along the axis, the two ends of the shell 1 are respectively fixedly connected with circular ring-shaped fixing members 3, the two ends of the reaction core plate 2 are fixedly connected with circular ring-shaped limiting members 5 by bolts 4, the side of the circular ring-shaped fixing member 3 away from the shell 1 is provided with a limiting groove 6 matched with the circular ring-shaped limiting member 5, the circular ring-shaped limiting member 5 is slidably engaged in the limiting groove 6, and a plurality of through holes are axially opened on the outer walls on both sides of the shell 1 An irradiation window 7 is provided through the side wall of the shell 1, and the irradiation window 7 is symmetrically arranged with the vertical center line of the reaction core plate 2 as the symmetry axis. A colorless and transparent light-transmitting plate 8 is fixedly connected in the irradiation window 7, and the light-transmitting plate 8 is sealedly connected to the irradiation window 7. The light-transmitting plate 8 is an arc-shaped glass plate or an arc-shaped acrylic plate. The arc-shaped light-transmitting plate 8 has a certain convergence effect on light, so that the light irradiated into the reactor can be better irradiated on the photocatalytic reaction membrane 17 on the reaction core plate 2, so as to better utilize the light energy of the light source. An LED light source strip 9 is arranged on the outside of the irradiation window 7, and the LED light source strip 9 is installed on the outside of the irradiation window 7 by a bracket or bonding, and irradiates the reaction core plate 2 through the irradiation window 7, so as to supplement light or serve as an irradiation light source when the external light is insufficient in dark weather or at night, so as to avoid the influence of insufficient light on the photocatalytic efficiency.

[0033] Specifically, the inner walls of the shell 1 , the limiting groove 6 and the annular limiting member 5 are all smooth surfaces. In this embodiment, the inner walls of the shell 1 , the limiting groove 6 and the annular limiting member 5 are provided with a Teflon corrosion-resistant and non-stick layer.

[0034] Specifically, the shell 1 is made of stainless steel, the circular fixing part 3 and the circular limiting part 5 are made of stainless steel or corrosion-resistant plastic, the outer wall of the shell 1 is provided with reinforcing ribs to enhance the supporting force of the shell 1, the circular fixing parts 3 at both ends of the shell 1 are respectively connected to the water inlet pipe 11 and the water outlet pipe 12 through flanges 10, the circular fixing part 3 is provided with a flange screw hole 13 that penetrates the circular fixing part 3 from the thickness direction, and is fixedly connected to the flange 10 by bolts, and a sealing ring groove is provided on the side of the circular fixing part 3 away from the shell 1 and the outer side of the limiting groove 6, and a rubber sealing ring 15 is fixedly connected in the sealing ring groove.

[0035] Specifically, the reaction core plate 2 includes a rectangular support plate 16, and the two vertical sides of the rectangular support plate 16 are respectively fixedly connected with a reaction membrane 17 loaded with a photocatalyst. The reaction membrane 17 is a flexible fiber cloth loaded with a photocatalyst. In this embodiment, the flexible fiber cloth is preferably a carbon cloth or a non-woven fabric. The photocatalyst (nano-scale titanium dioxide) is loaded on the reaction membrane 17 by in-situ deposition or bonding. The reaction membrane 17 is fixed on the vertical side of the rectangular support plate 16 by gluing or pressing with a hard thin mesh plate 18. In this embodiment, the reaction membrane 17 is fixed on the vertical side of the rectangular support plate 16 by pressing with a hard thin mesh plate 18. The hard thin mesh plate 18 is fixedly connected to the vertical side of the rectangular support plate 16 by bolts. The hard thin mesh plate 18 is made of stainless steel or a steel material coated with Teflon corrosion-resistant and non-stick coating.

[0036] Specifically, the annular limiting member 5 includes a limiting ring 19, the inner wall of which is fixedly connected with a limiting vertical rod 20 whose center is located at the center of the limiting ring 19, the limiting vertical rod 20 is fixedly connected to the end of the reaction core plate 2 by a bolt 4, the outer wall of the limiting ring 19 is fixedly connected with a positioning block 21, the inner wall of the limiting groove 6 is provided with a positioning groove 22 which is adapted to the positioning block 21, and the positioning block 21 is slidably engaged in the positioning groove 22. In this embodiment, the limiting ring 19, the limiting vertical rod 20 and the positioning block 21 are integrally formed.

[0037] The working principle of the utility model is that the two ends of the tubular photocatalytic reactor are respectively connected with an inlet pipe 11 and an outlet pipe 12 through flanges 10, and the sewage that has been initially treated by flocculation, filtration, etc. enters the shell 1 through the inlet pipe 11, and the sewage flows through the two sides of the reaction core plate 2 in the shell 1. The light sources on both sides of the shell 1 (natural light is used during sunny days, and when the external light is insufficient in cloudy weather or at night, the LED light source strip 9 is started to supplement the light or serve as a light source) are irradiated through the irradiation window 7 onto the reaction membrane 17 loaded with photocatalysts on both sides of the reaction core plate 2 to carry out photocatalytic reaction; the tubular photocatalytic reactor of the utility model has a simple structure, is easy to maintain, and adopts a vertical loaded photocatalyst The reaction core plate divides the interior of the shell into two water purification areas on the left and right along the axis, and adopts a dual light source setting of natural light and an external LED light strip, so that the photocatalyst on the reaction core plate can be better illuminated and contacted with the reactants, thereby improving the photocatalytic efficiency of the reactor and the effect of purifying water. The photocatalyst is loaded on the reaction membrane of the reaction core plate, which is convenient for catalyst recovery. By setting a light-transmitting plate, it has a certain convergence effect on light, which makes it convenient for the light irradiated into the reactor to be better irradiated on the photocatalytic reaction membrane of the reaction core plate, so as to better utilize the light energy of the light source. Through the cooperation of the circular fixing part and the circular limiting part, it is convenient to fix and disassemble the reaction core plate, and it is convenient for the maintenance of the reactor.

[0038] Embodiment 2:

[0039] like Fig. 9 As shown, the utility model provides a technical solution: a tubular photocatalytic reactor, comprising a cylindrical shell 1, a vertical reaction core plate 2 loaded with a photocatalyst is arranged inside the shell 1, the reaction core plate 2 axially penetrates the shell 1, and divides the interior of the shell 1 into two left and right water purification areas along the axis, the reaction core plate 2 comprises a rectangular support plate 16, two vertical side surfaces of the rectangular support plate 16 are respectively fixedly connected with a reaction membrane 17 loaded with a photocatalyst, a plurality of rectangular through holes 23 penetrating the rectangular support plate 16 from the thickness direction are provided on the side surface of the rectangular support plate 16, the shape of the rectangular through hole 23 can also be replaced by a circle, an ellipse, a diamond hole, a triangle, or a pentagon to an octagon, and the other structures are the same as those in the first embodiment.

[0040] Embodiment three:

[0041] like Fig.10As shown, the utility model provides a technical solution: a tubular photocatalytic reactor, comprising a cylindrical shell 1, a vertical reaction core plate 2 loaded with a photocatalyst is arranged inside the shell 1, the reaction core plate 2 axially penetrates the shell 1, and divides the interior of the shell 1 into two left and right water purification areas along the axis, the reaction core plate 2 comprises a rectangular support plate 16 and a reaction membrane 17 loaded with a photocatalyst, the rectangular support plate 16 is a rectangular frame 24, the reaction membrane 17 is clamped by two hard thin mesh plates 18, and fixedly connected in the rectangular frame 24, and other structures are the same as those in Example 1 or 2.

[0042] As an alternative, Fig.11 As shown, the LED light source strip 9 is fixedly connected to the inner wall of the irradiation window 7 .

[0043] As an alternative, the annular limiting member 5 can be replaced by a Chinese-shaped limiting member.

Claims

1. A tubular photocatalytic reactor, comprising a cylindrical shell (1), characterized in that: A reaction core plate (2) loaded with a photocatalyst is arranged vertically inside the shell (1), the reaction core plate (2) axially penetrates the shell (1), and an annular fixing member (3) is fixedly connected to both ends of the shell (1), and an annular limiting member (5) is fixedly connected to both ends of the reaction core plate (2) by bolts (4), and a limiting groove (6) matching the annular limiting member (5) is provided on the side of the annular fixing member (3) away from the shell (1), and the annular limiting member (5) is slidably engaged in the limiting groove (6), and a plurality of irradiation windows (7) penetrating the side wall of the shell (1) are axially provided on the outer walls on both sides of the shell (1), and the irradiation windows (7) are symmetrically arranged with the reaction core plate (2) as a symmetry axis, and a colorless and transparent light-transmitting plate (8) is fixedly connected inside the irradiation window (7), and the light-transmitting plate (8) is sealed and connected to the irradiation window (7), and an LED light source strip (9) is arranged outside the irradiation window (7).

2. A tubular photocatalytic reactor according to claim 1, characterized in that: The inner walls of the housing (1), the limiting groove (6) and the annular limiting member (5) are all smooth surfaces.

3. A tubular photocatalytic reactor according to claim 1, characterized in that: The inner walls of the housing (1), the limiting groove (6) and the annular limiting member (5) are provided with a Teflon corrosion-resistant and non-stick layer.

4. A tubular photocatalytic reactor according to claim 1, characterized in that: The shell (1) is made of stainless steel, the annular fixing member (3) and the annular limiting member (5) are made of stainless steel or corrosion-resistant plastic, the light-transmitting plate (8) is an arc-shaped glass plate or an arc-shaped acrylic plate, the LED light source strip (9) is mounted on the outside of the irradiation window (7) by means of a bracket or adhesive bonding, the outer wall of the shell (1) is provided with reinforcing ribs, the annular fixing members (3) at both ends of the shell (1) are respectively connected to a water inlet pipe (11) and a water outlet pipe (12) by means of flanges (10), the annular fixing member (3) is provided with a flange screw hole (13) penetrating the annular fixing member (3) from the thickness direction, and is fixedly connected to the flange (10) by means of bolts, the side of the annular fixing member (3) away from the shell (1) and the outer side of the limiting groove (6) are provided with a sealing ring groove, and a rubber sealing ring (15) is fixedly connected in the sealing ring groove.

5. The tubular photocatalytic reactor according to claim 1, characterized in that: The reaction core plate (2) comprises a rectangular support plate (16), and reaction films (17) carrying photocatalysts are respectively fixedly connected to two side surfaces of the rectangular support plate (16), and the reaction films (17) are fixed to the rectangular support plate (16) by gluing or pressing with a hard thin mesh plate (18).

6. A tubular photocatalytic reactor according to claim 5, characterized in that: The hard thin mesh plate (18) is made of stainless steel or a steel material with a Teflon corrosion-resistant non-stick coating on the surface.

7. A tubular photocatalytic reactor according to claim 5, characterized in that: The reaction membrane (17) is a flexible fiber cloth loaded with a photocatalyst.

8. The tubular photocatalytic reactor according to claim 1, characterized in that: The annular limiting member (5) comprises a limiting ring (19), the inner wall of which is fixedly connected with a limiting vertical rod (20) whose center is located at the center of the limiting ring (19), the limiting vertical rod (20) is fixedly connected to the end of the reaction core plate (2) via a bolt (4), the outer wall of the limiting ring (19) is fixedly connected with a positioning block (21), and the inner wall of the limiting groove (6) is provided with a positioning groove (22) adapted to the positioning block (21).

9. A tubular photocatalytic reactor according to claim 5, characterized in that: The side surface of the rectangular support plate (16) is provided with a plurality of rectangular through holes (23) penetrating the rectangular support plate (16) in the thickness direction. The shape of the rectangular through holes (23) can also be replaced by a circular, elliptical, diamond-shaped hole, a triangle, or a pentagon to an octagon.

10. The tubular photocatalytic reactor according to claim 5, characterized in that: The rectangular support plate (16) is a rectangular frame (24), and the reaction membrane (17) is clamped by two hard thin mesh plates (18) and fixedly connected in the rectangular frame (24).

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