A photo-thermal catalytic reaction apparatus

Abstract

The present application relates to harmful gas purification technical field, especially in kind of photo-thermal catalytic reaction equipment. Including the reaction tank and the heat collection unit, the reaction tank upper and lower ends are equipped with tank inlet and tank outlet respectively, and the sidewall is equipped with medium inlet and medium outlet;The medium inlet and medium outlet are in communication with the heat collection unit, and the hollow coil is arranged in the reaction tank;The hollow coil includes outer coil, the outer coil is spirally in the cavity of the reaction tank, and the outer coil is in communication with the medium inlet and the medium outlet respectively. The convex pipe of each group of sidewall of the present application is an independent cavity, so that the contact area of organic waste gas VOCs and heat energy is increased, so as to accelerate the reaction speed of organic waste gas VOCs, and improve the reaction effect of organic waste gas VOCs.

Description

Technical Field

[0001] This invention belongs to the field of harmful gas purification technology, and specifically relates to a photothermal catalytic reaction device. Background Technology

[0002] To effectively curb the rising trend of ozone concentration and fundamentally eliminate heavily polluted weather, VOCs treatment has become a key focus and hot topic in air pollution prevention and control. Currently, VOCs gas purification methods mostly employ regenerative thermal oxidizer (RTO) and regenerative thermal oxidation (RCO) technologies. These methods involve high reaction temperatures, typically between 500-800℃, requiring significant energy consumption during normal operation. Furthermore, the high processing temperatures place higher demands on equipment materials, further increasing the cost of material selection for the equipment.

[0003] Therefore, it is necessary to integrate energy collection methods such as solar thermal collection into the reaction process to reduce energy consumption. The solar thermal collection process mainly involves heating the medium, then bringing the medium into contact with VOCs gases to achieve the reaction. This method results in a lower reaction temperature and reduces the requirements for equipment materials. However, in existing solar thermal collection methods, due to the low medium temperature, it is difficult to ensure that VOCs fully absorb heat during the reaction, thus reducing the catalytic reaction effect. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a photothermal catalytic reaction device, comprising a reaction vessel and a heat collection unit. The reaction vessel is provided with a feed inlet and a discharge outlet at its upper and lower ends, respectively, and a medium inlet and a medium outlet are provided on its side wall. Both the medium inlet and the medium outlet are connected to the heat collection unit, and a hollow coil is provided inside the reaction vessel.

[0005] The hollow coil includes an outer coil; the outer coil is spirally coiled in the cavity of the reaction vessel, and its two ends are connected to the medium inlet and the medium outlet, respectively; an inner coil is provided inside the outer coil, the central axis of the inner coil coincides with the central axis of the outer coil, and its two ends are connected to the medium inlet and the medium outlet, respectively; several sets of sidewall protrusions are distributed in a ring array on the outer wall of the inner coil, and the cavity of the sidewall protrusions is not connected to the cavity of either the inner or outer coil; one side of the outer wall of the sidewall protrusion extends into the cavity of the inner coil; the two ends of the sidewall protrusion are connected to the tank inlet and the tank outlet, respectively.

[0006] Furthermore, a first conveying pipe is connected to the medium inlet, and a second conveying pipe is connected to the medium outlet. The ends of the first and second conveying pipes away from the reaction vessel are both connected to the cavity of the heat collection unit. A set of heat flow circulation pumps is provided on both the first and second conveying pipes.

[0007] Furthermore, an inner wall cavity is formed in the interlayer of the reaction vessel shell, and a spiral heat-conducting tube is provided in the inner wall cavity. The spiral heat-conducting tube is spirally coiled. Several sets of preheating ports are evenly distributed on the spiral heat-conducting tube, and the other end of the preheating port is connected to the cavity of the reaction vessel.

[0008] Furthermore, a hot gas inlet is provided on the side wall of the reaction vessel, one end of which is connected to the input end of the spiral heat pipe; the other end of the hot gas inlet is connected to a gas delivery pipe, the other end of which is provided with a filter plate, and the other end of the filter plate is connected to the heat collection unit.

[0009] Furthermore, the tank inlet and the tank outlet are respectively equipped with a first control valve and a second control valve.

[0010] Furthermore, a convex tube fixing bracket is provided on the outer wall of the side wall convex tube, and the other end of the convex tube fixing bracket is connected to the inner wall of the outer coil tube.

[0011] Furthermore, the heat collection unit includes a heat collection base frame; the heat collection base frame is provided with a medium storage chamber, and a reflux port is opened on the heat collection base frame, and the end of the second transport pipe away from the reaction tank is connected to the medium storage chamber through the reflux port.

[0012] Furthermore, the heat collection base is provided with an outlet, and the end of the first transport pipe away from the reaction vessel is connected to the medium storage chamber through the outlet.

[0013] Furthermore, the solar collector base is provided with several sets of solar collector tubes evenly distributed along the horizontal direction, and the solar collector tubes are configured as tubular structures with a fan-shaped cross-section.

[0014] Furthermore, several sets of reflective grooves are evenly distributed on the outer wall of the solar collector tube, and the inner diameter of the reflective groove near the opening is larger than its bottom inner diameter; the cavity of the solar collector tube is connected to the medium storage cavity.

[0015] The beneficial effects of this invention are:

[0016] 1. The medium is fed into the outer and inner coils through the first conveying pipe and the medium inlet, respectively. Then, the VOCs (volatile organic compounds) are fed into each set of sidewall protrusions through the tank inlet. As the VOCs move towards the tank outlet, heat is transferred to the sidewall protrusions from both inside and outside through the outer and inner coils. Each set of sidewall protrusions is an independent cavity, thereby increasing the contact area between the VOCs and heat, accelerating the reaction rate of the VOCs, and improving the reaction efficiency.

[0017] 2. The solar collector tube is designed with a fan-shaped annular cross-section, allowing it to be exposed to sunlight at any time and in any direction, thus extending its heat absorption time. Simultaneously, several sets of reflective grooves are evenly distributed on the solar collector tube, with the inner diameter near the opening being larger than the bottom inner diameter. Therefore, when sunlight shines into the reflective grooves, the refraction through each inner wall enhances the absorption efficiency of solar energy, thereby improving the overall solar energy absorption effect.

[0018] 3. The heat energy from the heated medium within the heat collection unit is transferred into the reaction vessel cavity through spiral heat pipes and various preheating ports. This preheats the heat collection unit to prevent excessive temperature differences between the inner and outer walls of the hollow coil after the medium enters, which could damage the coil shell. Furthermore, the spiral heat pipes and preheating ports are arranged in a spiral pattern, ensuring that heat energy can simultaneously reach all parts of the hollow coil, thereby improving the preheating effect and shortening the preheating time.

[0019] 4. In the field of photothermal catalytic VOCs degradation, a spiral hollow coil reactor was first created, which increases the residence time and contact area of ​​VOCs gas in the pipeline, allowing for sufficient heat exchange and improving the safety of the reaction process.

[0020] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the reaction apparatus according to Embodiment 1 of the present invention is shown;

[0023] Figure 2 A cross-sectional schematic diagram of a reaction vessel according to Embodiment 1 of the present invention is shown;

[0024] Figure 3 A schematic diagram showing the connection between the spiral heat pipe and the reaction vessel according to Embodiment 1 of the present invention is shown;

[0025] Figure 4A schematic diagram of the hollow coil according to Embodiment 1 of the present invention is shown;

[0026] Figure 5 A schematic diagram of the inner coil according to Embodiment 1 of the present invention is shown;

[0027] Figure 6 A schematic cross-sectional view of the end face of a hollow coil according to Embodiment 1 of the present invention is shown;

[0028] Figure 7 A schematic diagram of the structure of the heat collection unit according to Embodiment 1 of the present invention is shown;

[0029] Figure 8 A schematic diagram of the structure of a solar collector tube according to Embodiment 1 of the present invention is shown;

[0030] Figure 9 A schematic diagram of the structure of the textured reaction coil according to Embodiment 2 of the present invention is shown;

[0031] Figure 10 A schematic cross-sectional view of the end face of a textured reaction coil according to Embodiment 2 of the present invention is shown.

[0032] In the diagram: 100, reaction vessel; 110, medium inlet; 111, first conveying pipe; 120, medium outlet; 121, second conveying pipe; 130, hot gas inlet; 131, gas conveying pipe; 132, filter media plate; 140, tank inlet; 141, first control valve; 150, tank outlet; 151, second control valve; 160, inner wall cavity; 170, spiral heat conduction pipe; 180, preheating port. ; 200, Heat circulation pump; 300, Hollow coil; 310, External coil; 320, Internal coil; 330, Side wall protruding tube; 340, Protruding tube fixing bracket; 350, Guide coil; 360, Ruffled strip; 370, Frosted layer; 400, Heat collection unit; 410, Heat collection base frame; 420, Solar heat collection tube; 421, Reflective groove; 430, Return port; 440, Outlet port; 450, Hot air outlet. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1:

[0035] This invention provides a photothermal catalytic reaction device, including a reaction vessel 100 and a heat collection unit 400. For example,... Figure 1 and Figure 2 As shown, the cavity of the reaction vessel 100 is provided with a hollow coil 300, which is spirally coiled. By setting the hollow coil 300 into a spiral structure, the overall length of the hollow coil 300 is extended, which also allows for a longer reaction time of organic waste gas VOCs.

[0036] The reaction vessel 100 has a medium inlet 110, a medium outlet 120, and a hot gas inlet 130 on its side wall. A first medium inlet 110 is connected to the medium inlet 110, and a second medium outlet 121 is connected to the medium outlet 120. Both the first and second medium outlets 111 and 121 are connected to the cavity of the hollow coil 300. A gas inlet 130 is connected to the hot gas inlet 130, and a filter disc 132 is provided at the other end of the gas inlet 131. The ends of the first medium outlet 111, the second medium outlet 121, and the filter disc 132, away from the reaction vessel 100, are all connected to the cavity of the heat collection unit 400.

[0037] The heat collection unit 400 heats the medium by absorbing solar heat, and then the heated medium is transported to the hollow coil 300 via the first transport pipe 111. This achieves the heating reaction of VOCs in the organic waste gas. After the reaction is completed, the cooled medium returns to the cavity of the heat collection unit 400 via the second transport pipe 121.

[0038] Each of the first transport pipe 111, the second transport pipe 121, and the gas transport pipe 131 is equipped with a set of heat flow circulation pumps 200. The flow of the medium or hot gas is controlled by the heat flow circulation pumps 200.

[0039] The reaction vessel 100 has a tank inlet 140 and a tank outlet 150 at its upper and lower ends, respectively. A first control valve 141 and a second control valve 151 are respectively installed on the tank inlet 140 and tank outlet 150. The hollow coil 300 is connected to the tank inlet 140 and tank outlet 150 at both ends. Organic waste gas (VOCs) is introduced into the hollow coil 300 through the tank inlet 140, and after heat exchange and reaction with the medium, it is discharged through the tank outlet 150.

[0040] For example, such as Figure 3 As shown, an inner wall cavity 160 is formed in the interlayer of the shell of the reaction vessel 100. A spiral heat-conducting pipe 170 is provided in the inner wall cavity 160, and the spiral heat-conducting pipe 170 is spirally coiled. Several sets of preheating ports 180 are evenly distributed on the spiral heat-conducting pipe 170, and the other end of the preheating port 180 is connected to the cavity of the reaction vessel 100.

[0041] Before the VOCs reaction begins, a set of heat circulation pumps 200 on the gas supply pipe 131 is first turned on. The heat energy from the preheated medium in the heat collection unit 400 is then introduced into the cavity of the reaction tank 100 through the spiral heat pipe 170 and each set of preheating ports 180. This preheats the heat collection unit 400 to prevent excessive temperature differences between the inner and outer walls of the hollow coil 300 after the medium enters, which could damage the shell of the hollow coil 300. Furthermore, the spiral heat pipe 170 and the preheating ports 180 are spirally distributed, allowing heat energy to act simultaneously on all parts of the hollow coil 300, thereby improving the preheating effect and shortening the preheating time.

[0042] The hollow coil 300 includes an outer coil 310. For example, as shown... Figure 4 , Figure 5 and Figure 6 As shown, the outer coil 310 is spirally coiled within the cavity of the reaction vessel 100, with its two ends connected to the medium inlet 110 and the medium outlet 120, respectively. An inner coil 320 is located inside the outer coil 310, with its central axis coinciding with that of the outer coil 310. The inner coil 320 is also connected to the medium inlet 110 and the medium outlet 120, respectively. Several sets of sidewall protrusions 330 are arranged in a ring array on the outer wall of the inner coil 320. The cavities of these sidewall protrusions 330 are not connected to the cavities of either the inner coil 320 or the outer coil 310. A protrusion fixing bracket 340 is provided on the outer wall of each sidewall protrusion 330, with its other end connected to the inner wall of the outer coil 310. One side of the outer wall of each sidewall protrusion 330 extends into the cavity of the inner coil 320. The two ends of the side wall protrusion 330 are connected to the tank inlet 140 and the tank outlet 150, respectively.

[0043] During the reaction process, the medium is first introduced into the outer coil 310 and inner coil 320 through the first conveying pipe 111 and the medium inlet 110, respectively. Then, the first control valve 141 is opened, and the organic waste gas (VOCs) is introduced into each set of side wall protrusions 330 through the tank inlet 140. As the organic waste gas (VOCs) moves towards the tank outlet 150, heat energy is transferred to the side wall protrusions 330 from both inside and outside through the outer coil 310 and inner coil 320. Each set of side wall protrusions 330 is an independent cavity, thereby increasing the contact area between the organic waste gas (VOCs) and heat energy, thus accelerating the reaction rate of the organic waste gas (VOCs) and improving the reaction effect.

[0044] The heat collection unit 400 includes a heat collection base frame 410. For example, as shown... Figure 7 and Figure 8As shown, the solar collector base 410 has a medium storage chamber inside, and a reflux port 430 is opened on the solar collector base 410. The end of the second medium supply pipe 121 away from the reaction tank 100 is connected to the medium storage chamber through the reflux port 430. The solar collector base 410 has an outlet port 440, and the end of the first medium supply pipe 111 away from the reaction tank 100 is connected to the medium storage chamber through the outlet port 440. The solar collector base 410 has a hot gas outlet 450, and the end of the filter media disc 132 away from the gas supply pipe 131 is connected to the medium storage chamber through the hot gas outlet 450. Several sets of solar collector tubes 420 are evenly distributed along the horizontal direction on the solar collector base 410. The solar collector tubes 420 are set as tubular structures with a fan-shaped cross-section. Several sets of reflective grooves 421 are evenly distributed on the outer wall of the solar collector tubes 420. The inner diameter of the reflective groove 421 near the opening is larger than its bottom inner diameter. The cavity of the solar collector tube 420 is connected to the medium storage cavity.

[0045] The medium flows from the medium storage cavity into the solar collector tube 420, and then the solar collector tube 420 absorbs heat energy to heat the medium, thereby realizing the function of heat collection.

[0046] The solar collector tube 420 is designed with a fan-shaped annular cross-section, allowing it to be irradiated regardless of the time or the sun's position, thus extending its heat absorption time. Simultaneously, several sets of reflective grooves 421 are evenly distributed on the solar collector tube 420, with the inner diameter near the opening being larger than the bottom inner diameter. Therefore, when sunlight shines into the reflective grooves 421, the refraction through each inner wall enhances the solar energy absorption efficiency, thereby improving the overall solar energy absorption effect.

[0047] This embodiment has the following effects:

[0048] 1. The medium is fed into the outer coil 310 and inner coil 320 through the first conveying pipe 111 and the medium inlet 110, respectively. Then, the VOCs of organic waste gas are fed into each set of side wall protrusions 330 through the tank inlet 140. As the VOCs of organic waste gas move towards the tank outlet 150, heat energy is transferred to the side wall protrusions 330 from both inside and outside through the outer coil 310 and inner coil 320. Each set of side wall protrusions 330 is an independent cavity, thereby increasing the contact area between the VOCs of organic waste gas and the heat energy, thus accelerating the reaction rate of the VOCs of organic waste gas and improving the reaction effect.

[0049] 2. The solar collector tube 420 is designed with a fan-shaped annular cross-section, allowing it to be irradiated regardless of the time or the sun's position, thus extending its heat absorption time. Simultaneously, several sets of reflective grooves 421 are evenly distributed on the solar collector tube 420, with the inner diameter near the opening being larger than the bottom inner diameter. Therefore, when sunlight shines into the reflective grooves 421, the refraction through each inner wall enhances the solar energy absorption efficiency, thereby improving the overall solar energy absorption effect.

[0050] 3. The heat energy from the heated medium within the heat collection unit 400 is transferred into the cavity of the reaction vessel 100 through the spiral heat pipe 170 and each set of preheating ports 180. This preheats the heat collection unit 400 to prevent excessive temperature differences between the inner and outer walls of the hollow coil 300 after the medium enters, which could damage the shell of the hollow coil 300. Furthermore, the spiral heat pipe 170 and the preheating ports 180 are spirally distributed, allowing heat energy to act simultaneously on all parts of the hollow coil 300, thereby improving the preheating effect and shortening the preheating time.

[0051] Example 2:

[0052] This invention also provides a photothermal catalytic reaction apparatus, including a reaction vessel 100 and a hollow coil 300. For example,... Figure 9 and Figure 10 As shown, the structures of the reaction vessel 100, the heat flow circulation pump 200, and the heat collection unit 400 are the same as those in Example 1.

[0053] The hollow coil 300 includes a guiding coil 350, which is spirally coiled within the cavity of the reaction vessel 100. The upper and lower ends of the guiding coil 350 are connected to the medium inlet 110 and the medium outlet 120, respectively. Several sets of raised ribs 360 are arranged in a ring array on the outer wall of the guiding coil 350, and the cavities of the raised ribs 360 are connected to the cavity of the guiding coil 350. The guiding coil 350 and the several sets of raised ribs 360 combine to form a textured hollow coil. A frosted layer 370 is provided on the outer wall of the textured hollow coil. Several sets of stainless steel rods are provided on the outer wall of the textured hollow coil.

[0054] Preferably, the number of raised strips 360 can be, but is not limited to, four, six, or eight groups. In this embodiment, six groups of raised strips 360 are used as a preferred embodiment.

[0055] When reacting with VOCs gases, the catalytic reaction temperature needs to be controlled at around 200℃. A six-ribbed hollow coil is preferred to increase the heat exchange area. The preferred coil dimensions are: outer diameter 20cm, inner diameter 10cm, and length 5 meters; coil diameter 40cm, pitch 2cm, and 5 turns. Simultaneously, a photothermal catalyst is coated on the stainless steel rod surface to increase the space utilization of the equipment. The medium is heated to 400℃ and introduced into the six-ribbed hollow coil. The surface temperature of the ribbed hollow coil is then heated to 300℃±20℃ by the medium. The concentration of VOCs gases emitted in industrial environments is 100ppm, and the pre-reaction temperature is room temperature (15-30℃). The post-reaction temperature is 300℃±20℃.

[0056] During the reaction, the residence time of VOCs gas is 3 seconds, the conversion rate of toluene in VOCs gas can reach over 95%, and the device can operate continuously and stably for 100 days. Compared with the traditional regenerative thermal oxidizer (RTO), the hollow coil reactor saves about 50% of energy, and compared with the traditional thermocatalytic oxidation reactor (RCO), it saves about 30% of energy, demonstrating superior energy-saving benefits at the same toluene removal rate.

[0057] This embodiment has the following beneficial effects:

[0058] 1. Solar energy is the main energy source for VOCs gas reaction. It is green and pollution-free. By organically coupling solar thermal utilization with photothermal catalysis technology, the power consumption and energy consumption of photothermal catalytic combustion equipment can be saved, and the low-carbonization of the equipment can be achieved from the source.

[0059] 2. The first hollow coil reactor in the field of photothermal catalytic VOCs degradation can effectively improve internal heat exchange and enhance the safety of the reaction process;

[0060] 3. Hollow coil reactors have low gas resistance, making them excellent structural catalyst supports. The reactor pressure is close to atmospheric pressure, effectively reducing systemic risks.

[0061] 4. This invention patent has a wide range of applications, is simple to operate, and has a long service life. It makes full use of solar energy to realize the dual functions of efficient thermal energy utilization and photothermal catalytic degradation of photothermal catalytic combustion equipment.

[0062] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photothermal catalytic reaction device, characterized in that: The system includes a reaction vessel (100) and a heat collection unit (400). The reaction vessel (100) has a tank inlet (140) and a tank outlet (150) at its upper and lower ends, respectively, and a medium inlet (110) and a medium outlet (120) on its side wall. The medium inlet (110) and the medium outlet (120) are both connected to the heat collection unit (400). The reaction vessel (100) is equipped with a hollow coil (300). The hollow coil (300) includes an outer coil (310); the outer coil (310) is spirally coiled in the cavity of the reaction vessel (100), and its two ends are connected to the medium inlet (110) and the medium outlet (120), respectively; an inner coil (320) is provided inside the outer coil (310), the central axis of the inner coil (320) coincides with the central axis of the outer coil (310), and its two ends are connected to the medium inlet (110) and the medium outlet (120), respectively. 110) and the medium outlet (120) are connected; several sets of side wall protrusions (330) are arranged in a ring array on the outer wall of the inner coil (320), and the cavity of the side wall protrusions (330) is not connected to the cavity of the inner coil (320) and the outer coil (310); one side of the outer wall of the side wall protrusions (330) extends into the cavity of the inner coil (320); the two ends of the side wall protrusions (330) are connected to the tank inlet (140) and the tank outlet (150) respectively; The reaction vessel (100) has an inner wall cavity (160) in the interlayer of the shell. The inner wall cavity (160) is provided with a spiral heat-conducting tube (170), which is spirally coiled; a number of preheating ports (180) are evenly distributed on the spiral heat-conducting tube (170), and the other end of the preheating port (180) is connected to the cavity of the reaction vessel (100). The hollow coil (300) also includes a media-conducting coil (350), which is spirally coiled in the cavity of the reaction vessel (100). The upper and lower ends of the media-conducting coil (350) are connected to the media inlet (110) and the media outlet (120) respectively. Several sets of raised strips (360) are distributed in a ring array on the outer wall of the media-conducting coil (350). The cavity of the raised strips (360) is connected to the cavity of the media-conducting coil (350). The media-conducting coil (350) and several sets of raised strips (360) are combined to form a raised hollow coil. A frosted layer (370) is provided on the outer wall of the raised hollow coil. Several sets of stainless steel rods are provided on the outer wall of the raised hollow coil, and a photothermal catalyst is coated on the surface of the stainless steel rods.

2. The photothermal catalytic reaction device according to claim 1, characterized in that: The medium inlet (110) is connected to a first transport pipe (111), and the medium outlet (120) is connected to a second transport pipe (121). The ends of the first transport pipe (111) and the second transport pipe (121) away from the reaction vessel (100) are both connected to the cavity of the heat collection unit (400). A set of heat flow circulation pumps (200) is provided on the first transport pipe (111) and the second transport pipe (121).

3. The photothermal catalytic reaction device according to claim 2, characterized in that: A hot gas inlet (130) is provided on the side wall of the reaction vessel (100). One end of the hot gas inlet (130) is connected to the input end of the spiral heat pipe (170). The other end of the hot gas inlet (130) is connected to a gas delivery pipe (131). The other end of the gas delivery pipe (131) is provided with a filter plate (132). The other end of the filter plate (132) is connected to the heat collection unit (400).

4. The photothermal catalytic reaction device according to claim 1, characterized in that: The tank inlet (140) and tank outlet (150) are respectively equipped with a first control valve (141) and a second control valve (151).

5. The photothermal catalytic reaction device according to claim 1, characterized in that: The outer wall of the side wall protrusion tube (330) is provided with a protrusion tube fixing bracket (340), and the other end of the protrusion tube fixing bracket (340) is connected to the inner wall of the outer coil tube (310).

6. The photothermal catalytic reaction apparatus according to claim 2, characterized in that: The heat collection unit (400) includes a heat collection base frame (410); the heat collection base frame (410) is provided with a medium storage cavity, and a reflux port (430) is opened on the heat collection base frame (410). The end of the second transport pipe (121) away from the reaction tank (100) is connected to the medium storage cavity through the reflux port (430).

7. The photothermal catalytic reaction apparatus according to claim 6, characterized in that: The heat collection base (410) is provided with an outlet (440), and the end of the first transport pipe (111) away from the reaction tank (100) is connected to the medium storage cavity through the outlet (440).

8. The photothermal catalytic reaction apparatus according to claim 7, characterized in that: The solar collector base (410) has several sets of solar collector tubes (420) evenly distributed along the horizontal direction. The solar collector tubes (420) are configured as tubular structures with a fan-shaped cross section.

9. The photothermal catalytic reaction apparatus according to claim 8, characterized in that: The outer wall of the solar collector tube (420) is evenly distributed with several sets of reflective grooves (421). The inner diameter of the reflective groove (421) near the opening is larger than its bottom inner diameter. The cavity of the solar collector tube (420) is connected to the medium storage cavity.

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