Novel quartz glass photocatalytic microchannel reactor

Abstract

The invention discloses a novel quartz glass photocatalytic microchannel reactor, and relates to the technical field of photocatalytic reactor equipment. The reactor comprises a box body, a lamp panel, an adjustable bracket, a photocatalytic reaction unit and a controller, the lamp panel, the adjustable bracket and the photocatalytic reaction unit are arranged in the box body, and the controller is respectively connected with the lamp panel and the photocatalytic reaction unit; the photocatalytic reaction unit comprises a cover plate, a quartz glass plate, a reaction plate and a heat exchange plate which are arranged from top to bottom, a reaction channel is formed in the side, close to the quartz glass plate, of the reaction plate, and a heat exchange short circuit prevention channel is formed in the side, close to the heat exchange plate, of the reaction plate. Quartz glass is adopted for transmitting light with almost all wavelengths, light intensity attenuation is greatly reduced, the photoelectric efficiency is greatly reduced under the same working condition, the cost is saved, and meanwhile the working condition of most photocatalytic reactions can be met.

Description

Technical Field

[0001] The invention relates to the technical field of photocatalytic reactor equipment, in particular to a novel quartz glass photocatalytic microchannel reactor. Background Art

[0002] A photocatalytic reactor is a reactor that uses light as a catalyst in a microchannel. Photocatalysis is widely used in the field of chemical synthesis. Currently, most microchannel reactors used for photocatalysis are made of high borosilicate glass. However, due to the poor light transmittance of high borosilicate glass to light with a wavelength below 300nm, many experimental structures of photocatalytic reactions are not ideal, and even lead to experimental failure. Quartz glass has good light transmittance to all wavelengths of light, but since the current quartz glass photoreactors are all tubular, it is impossible to achieve high mixed mass transfer and heat exchange functions for microchannel reactors. Summary of the invention

[0003] In view of the above problem that the current quartz glass photoreactors are all tubular and cannot realize high mixed mass transfer and heat exchange functions for microchannel reactors, the present invention provides a novel quartz glass photocatalytic microchannel reactor.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A novel quartz glass photocatalytic microchannel reactor comprises a housing, a lamp panel, an adjustable bracket, a photocatalytic reaction unit and a controller, wherein the housing has a receiving cavity, the lamp panel, the adjustable bracket and the photocatalytic reaction unit are arranged in the receiving cavity, the lamp panel provides a light source for the photocatalytic reaction unit, and the controller is connected to the lamp panel and the photocatalytic reaction unit respectively; the photocatalytic reaction unit comprises a cover plate, a quartz glass plate, a reaction plate and a heat exchange plate, the cover plate, the quartz glass plate, the reaction plate and the heat exchange plate are arranged from top to bottom, a reaction channel is arranged on one side of the reaction plate adjacent to the quartz glass plate, and a heat exchange anti-short circuit channel is arranged on one side of the heat exchange plate adjacent to the heat exchange plate;

[0006] Furthermore, the photocatalytic reaction unit is located at the lower part of the adjustable bracket, the light board is detachably connected to the upper part of the adjustable bracket, and the light board moves relative to the photocatalytic reaction unit through the adjustable bracket.

[0007] Furthermore, sealing rings are provided between the cover plate and the quartz glass plate, and between the quartz glass plate and the reaction plate, and are fixedly connected by bolts.

[0008] Furthermore, the reaction channel has a plurality of bends, each bend has a mixing unit group formed by connecting a plurality of heart-shaped mixing units, and a pressure balancing unit is arranged between adjacent mixing unit groups. A feed unit is arranged at one end of the reaction channel, and a discharge port is arranged at the other end.

[0009] Furthermore, a first baffle is provided in the mixing unit, and the side wall of the first baffle and the side wall of the mixing unit are both uneven.

[0010] Furthermore, the pressure balancing unit is adjacent to the inlet end of the mixing unit group, and a plurality of second baffles are arranged in each of the pressure balancing units along the material flow direction, and the side walls of the second baffles are uneven.

[0011] Furthermore, the feed unit is connected with a first feed port and a second feed port, and a third stopper approximately in a U shape is arranged in the cavity of the feed unit.

[0012] Furthermore, the reaction channel includes a first reaction channel and a second reaction channel, a hollow cylindrical temperature measuring port is provided between the first reaction channel and the second reaction channel, and the temperature transmitter is inserted into the temperature measuring port along the material flow direction through a temperature measuring probe.

[0013] Furthermore, the heat exchange short circuit prevention channel is provided with a heat exchange inlet and a heat exchange outlet. A display screen, a buzzer, a plurality of knobs and a plurality of indicator lights are provided on one side of the box body, the controller is respectively connected with the display screen, the buzzer, the feed pump, the temperature transmitter, the plurality of knobs and the plurality of indicator lights, and the bottom of the box body has a plurality of moving wheels.

[0014] Furthermore, the reaction plate is made of metal or plastic. The light board has a plurality of LED lamp beads, each of which has a different wavelength, and the wavelength is at least 260nm.

[0015] The beneficial effects of the present invention are as follows: the present invention uses a quartz glass plate to transmit almost all wavelengths of light, greatly reducing the attenuation of light intensity, and greatly reducing the photoelectric efficiency under the same working conditions, saving costs while meeting the working conditions of most photocatalytic reactions. In the present invention, the controller is connected to the light board and the temperature transmitter respectively, and can display parameters such as light intensity and temperature through the display screen, and can be adjusted using the buttons on the display screen, and can cooperate with the TCU temperature control system to accurately control the reaction temperature. The controller also cooperates with the feed pump to realize one-button start and stop, flow ratio, and automatic flow reduction in overtemperature. The functions can be linked to each other, and the process experiment data can be obtained quickly and conveniently under the premise of ensuring safe experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1Shown is a schematic diagram of the structural principle of an embodiment of the present invention.

[0017] Figure 2 Shown is a schematic structural diagram of the photocatalytic reaction unit.

[0018] Figure 3 Shown Figure 2 Top view of the .

[0019] Figure 4 Shown Figure 3 A partial enlarged view of point A in the middle.

[0020] Explanation of the reference numerals: 1. housing; 2. lamp board; 3. adjustable bracket; 4. photocatalytic reaction unit; 5. display screen; 6. knob; 7. indicator light; 8. buzzer; 9. moving wheel; 10. cover plate; 11. quartz glass plate; 12. reaction plate; 13. heat exchange plate; 14. reaction channel; 15. heat exchange short-circuit prevention channel; 16. first feed port; 17. second feed port; 18. temperature measuring port; 19. heat exchange inlet; 20. heat exchange outlet; 21. temperature measuring port; 22. mixing unit; 23. first stopper; 24. pressure balance unit; 25. second stopper; 26. feed unit; 27. third stopper. DETAILED DESCRIPTION

[0021] The present invention discloses a novel quartz glass photocatalytic microchannel reactor. A specific implementation mode of the present utility model is described below in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, the quartz glass photocatalytic microchannel reactor includes a housing 1, a lamp board 2, an adjustable bracket 3, a photocatalytic reaction unit 4 and a controller. The top of the housing 1 has a handle, and the left side of the housing 1 has a receiving cavity, in which the lamp board 2, the adjustable bracket 3 and the photocatalytic reaction unit 4 are arranged. The photocatalytic reaction unit 4 is fixed to the lower part of the adjustable bracket 3, the lamp board 2 is detachably connected to the upper part of the adjustable bracket 3, and the lamp board 2 can move relative to the photocatalytic reaction unit 4 through the adjustable bracket 3 to adjust the distance between the lamp board 2 and the photocatalytic reaction unit 4. The lamp board 2 has a number of UV series LED lamp beads, each of which has a different wavelength, including wavelengths of 260nm to 270nm, 270nm to 280nm, 280nm to 290nm, 290nm to 300nm and different wavelengths above 300nm. During the experiment, the power of the lamp board 2 can be adjusted within the range of tens of millions of watts, which improves the convenience of users in actual process requirements and operations.

[0023] Combination Figure 2 and Figure 3As shown, the photocatalytic reaction unit 4 includes a cover plate 10, a quartz glass plate 11, a reaction plate 12 and a heat exchange plate 13, and the cover plate 10, the quartz glass plate 11, the reaction plate 12 and the heat exchange plate 13 are arranged from top to bottom. A sealing ring is provided between the cover plate 10 and the quartz glass plate 11 and between the quartz glass plate 11 and the reaction plate 12, and the cover plate 10, the quartz glass plate 11 and the reaction plate 12 are fixedly connected by bolts. The quartz glass plate 11 has the characteristics of high transparency, which can transmit almost all wavelengths of light, and at the same time greatly reduce the attenuation of light intensity, greatly reduce the photoelectric power under the same working conditions, and save costs. The quartz glass plate 11 selects high-transparency quartz glass plates 11 of different thicknesses according to different pressure conditions, with a maximum pressure resistance of 1.8 MPa, which can meet most photocatalytic reaction conditions. The reaction plate 12 is made of metal or special plastic material, and the reaction surface on the upper side of the reaction plate 12 is adjacent to the quartz glass plate 11, and the heat exchange surface on the lower side is adjacent to the heat exchange plate 13. The reaction surface is provided with a micrometer-scale reaction channel 14, and the heat exchange surface is provided with a millimeter-scale heat exchange anti-short circuit channel 15.

[0024] like Figure 4 As shown, the reaction channel 14 has several bends, each bend has a mixing unit 22 group formed by connecting several mixing units 22 approximately in a heart shape, and a pressure balance unit 24 is arranged between adjacent mixing unit 22 groups. A feed unit 26 is arranged at one end of the reaction channel 14, and a discharge port 18 is arranged at the other end. A third stopper 27 approximately in a U shape is arranged in the cavity of the feed unit 26, and the opening of the third stopper 27 faces the direction of material flow. The feed unit 26 is connected to the first feed port 16 and the second feed port 17, and the second feed port 17 is connected to the opening of the third stopper 27. The middle part of the cavity of the mixing unit 22 has a first baffle approximately in a triangular shape, and the side wall of the first stopper 23 and the side wall of the mixing unit 22 are both uneven, so that the materials can be fully mixed. The pressure balance unit 24 is approximately rectangular, and a plurality of second baffles 25 are arranged in the hollow interior of the pressure balance unit 24 along the material flow direction, and the side walls of each second baffle are uneven. The reaction channel 14 has a first feed port 16, a second feed port 17 and a discharge port 18, and the first feed port 16 and the second feed port 17 are both connected to the feed pump. The heat exchange short circuit prevention channel 15 has a temperature measuring port 21, a heat exchange inlet 19 and a heat exchange outlet 20, and a temperature measuring probe of a temperature transmitter is arranged at the temperature measuring port 21.

[0025] Under the action of the feed pump, the first feed port 16 and the second feed port 17 are fed into the reaction channel 14 in a front-to-back order. The first material is first fed into the first feed port 16, and then the second material is fed into the second feed port 17. The mixing unit 22 group can prevent the material from having a backflow problem after different feed pressures. The feed unit 26 can make the first material and the second material wrapped, which is conducive to uniform feeding and mixing of heterogeneous materials. The first stopper 23 in the mixing unit 22 adopts a non-smooth transition design, and the uneven side wall is used to increase the interface area, so that the first material and the second material can have more contact mixing. The first material and the second material are collided and mixed after passing through the first stopper 23 of the first mixing unit 22, and then enter the first stopper 23 of the second mixing unit 22 and collide and mix again, which has a good mass transfer effect, especially improving the rate of heterogeneous response. The pressure balance unit 24 is located at the entrance end of each group of mixing units 22. The pressure balance unit 24 is provided with a plurality of second blocks 25 approximately in a rectangular shape along the material flow direction. The side walls of each second block 25 are uneven, which can maintain the smooth flow of the material and prevent the material from flowing too fast and causing short flow. The reaction channel includes a first reaction channel and a second reaction channel. The first reaction channel and the second reaction channel are connected at the back with a hollow cylindrical temperature measuring port 21. There is a gap on the side wall of the temperature measuring port 21 for material flow. The temperature transmitter is inserted into the temperature measuring port along the material flow direction through a temperature measuring probe, which can ensure that the temperature measuring probe is fully in contact with the material and ensure the accuracy of the temperature measurement result.

[0026] A TCU temperature control system is arranged on the right side of the box 1, and the TCU temperature control system is connected to the temperature transmitter through a controller for accurately controlling the reaction temperature. A display screen 5, a mute knob, a reset knob, a power indicator light, an equipment fault indicator light, an over-temperature alarm indicator light and a buzzer 8 are arranged on the right outer wall of the box 1, and the controller is respectively connected to the feed pump, the display screen 5, the mute knob, the reset knob, the power indicator light, the equipment fault indication, the over-temperature alarm indicator light and the buzzer 8. Several moving wheels 9 are connected to the bottom of the box 1 for easy movement. The display screen 5 can adjust the intensity of the light board 2, display the temperature parameters detected by the temperature measuring probe, and realize the over-temperature alarm function. The controller cooperates with the TCU temperature control system, and can make judgments based on the temperature detected by the temperature measuring probe of the temperature transmitter, realize one-button start and stop, flow ratio, automatic flow reduction in over-temperature and other functions, and obtain process test data conveniently and quickly under the premise of ensuring safe experiments.

[0027] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A novel quartz glass photocatalytic microchannel reactor, characterized in that: The invention comprises a housing (1), a light panel (2), an adjustable bracket (3), a photocatalytic reaction unit (4) and a controller. The housing (1) has a receiving cavity. The light panel (2), the adjustable bracket (3) and the photocatalytic reaction unit (4) are arranged in the receiving cavity. The light panel (2) provides a light source for the photocatalytic reaction unit (4). The controller is respectively connected to the light panel (2) and the photocatalytic reaction unit (4). The photocatalytic reaction unit (4) comprises a cover plate (10), a quartz glass plate (11), a reaction plate (12) and a heat exchange plate (13). The cover plate (10) is a heat exchange plate (13). The plate (10), the quartz glass plate (11), the reaction plate (12) and the heat exchange plate (13) are arranged from top to bottom; a reaction channel (14) is arranged on the side of the reaction plate (12) adjacent to the quartz glass plate (11); and a heat exchange anti-short circuit channel (15) is arranged on the side adjacent to the heat exchange plate (13); the photocatalytic reaction unit (4) is located at the lower part of the adjustable bracket (3); the lamp board (2) is detachably connected to the upper part of the adjustable bracket (3); and the lamp board (2) moves relative to the photocatalytic reaction unit (4) through the adjustable bracket (3).

2. A novel quartz glass photocatalytic microchannel reactor according to claim 1, characterized in that: Sealing rings are provided between the cover plate (10) and the quartz glass plate (11), and between the quartz glass plate (11) and the reaction plate (12), and are fixedly connected by bolts.

3. The novel quartz glass photocatalytic microchannel reactor according to claim 1, characterized in that: The reaction channel (14) has a plurality of bends, each bend has a mixing unit (22) group formed by connecting a plurality of heart-shaped mixing units (22), and a pressure balancing unit (24) is arranged between adjacent mixing unit (22) groups; A feeding unit (26) is provided at one end of the reaction channel (14), and a discharge port (18) is provided at the other end.

4. The novel quartz glass photocatalytic microchannel reactor according to claim 3, characterized in that: A first baffle (23) is provided in the mixing unit (22), and the side wall of the first baffle and the side wall of the mixing unit (22) are both uneven.

5. The novel quartz glass photocatalytic microchannel reactor according to claim 3, characterized in that: The pressure balancing unit (24) is adjacent to the inlet end of the mixing unit (22) group, and a plurality of second baffles (25) are arranged in each of the pressure balancing units (24) along the material flow direction, and the side walls of the second baffles are uneven.

6. The novel quartz glass photocatalytic microchannel reactor according to claim 3 is characterized in that: The feeding unit (26) is connected to the first feeding port (16) and the second feeding port (17), and a third stopper (27) which is approximately U-shaped is arranged in the cavity of the feeding unit (26).

7. The novel quartz glass photocatalytic microchannel reactor according to claim 1, characterized in that: The reaction channel (14) comprises a first reaction channel and a second reaction channel, a temperature measuring port in the shape of a hollow cylinder is arranged between the first reaction channel and the second reaction channel, and the temperature transmitter is inserted into the temperature measuring port along the material flow direction through a temperature measuring probe.

8. The novel quartz glass photocatalytic microchannel reactor according to claim 1, characterized in that: The heat exchange short-circuit prevention channel (15) is provided with a heat exchange inlet (19) and a heat exchange outlet (20); A display screen (5), a buzzer (8), a plurality of knobs (6) and a plurality of indicator lights (7) are arranged on one side of the box body (1); the controller is respectively connected to the display screen (5), the buzzer (8), the feed pump, the temperature transmitter, the plurality of knobs (6) and the plurality of indicator lights (7); and a plurality of moving wheels (9) are arranged at the bottom of the box body (1).

9. The novel quartz glass photocatalytic microchannel reactor according to claim 1, characterized in that: The reaction plate (12) is made of metal or plastic; The light board (2) has a plurality of LED lamp beads, each of which has a different wavelength, and the wavelength is at least 260 nm.

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