A photothermal reaction device

Abstract

The present invention relates to a photothermal reaction device, which includes a kettle cover assembly. A first chamber with a downward opening is defined inside the kettle cover assembly, and a light window is provided at the top of the first chamber. A second chamber with an upward opening is defined at the top of the kettle body. A reaction chamber is formed between the second chamber and the first chamber. A sealing member is installed on the mating surface of the kettle body and the kettle cover assembly for sealing. The feeding channel and the discharging channel on the kettle body are both communicated with the reaction area. In the second chamber, a heat insulation block, a heating sheet, a filtering element, a microporous membrane and a pressing ring are stacked in sequence from the bottom to the top. The wire of the heating sheet penetrates through the heat insulation block and the bottom of the kettle body, and after being insulated and sealed with the bottom of the kettle body, it extends and is connected to an external heating circuit. A temperature sensor mounting seat and a through hole are provided on the kettle body, etc., for measuring the temperature at the lower surface of the microporous membrane above the filtering element. Thereby, the structure inside the kettle body is compact, the material channels, temperature sensing and wire arrangement are reasonable, and a way of leading out the wire under high temperature and high pressure conditions is provided, with a simple structure and firm sealing.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical reaction devices, and more particularly to a photothermal reaction device. Background Art

[0002] Most traditional reactors only support external heating and external temperature measurement. For example, in a tube furnace, the experimental conditions are limited, the energy consumption required to reach the experimental conditions is relatively high, and the accuracy guarantee of the experimental conditions and results is poor. To solve the above technical problems, internal heating solutions have emerged in the prior art. However, some of these internal heating solutions have relatively complex structures and are not easy to produce and process, while some have simple structures but the achievable experimental conditions are still limited. At the same time, for this internal heating solution, when dealing with the problems of leading out wires and temperature sensors, generally, solutions such as applying high-temperature glue and using high-temperature-resistant connectors are adopted. The former is not convenient for replacement and is likely to cause deviations in the detection of trace substances in the experimental results; the latter also has some problems, such as the insufficient service temperature and gas pressure resistance of glass high-temperature connectors, and high prices. At the same time, traditional reaction kettles generally only support reactions under separate solid, separate liquid, separate gas, or some combined conditions. Therefore, how to provide a photothermal reaction kettle with a compact structure, perfect functions, long-term sealing, and no interference to solve the above problems is an urgent problem for those skilled in the art. Summary of the Invention

[0003] The present invention aims to solve at least one of the above technical problems in the prior art to some extent.

[0004] The first object of the present invention is to provide a photothermal reaction device to solve the problem of the layout of internal heating wires in the reaction kettle;

[0005] To this end, the present invention provides a photothermal reaction device, including:

[0006] A kettle cover assembly, a first chamber with a downward opening is defined inside the kettle cover assembly, and a light window is provided at the top of the first chamber;

[0007] A kettle body, a second chamber with an upward opening is defined at the top of the kettle body, and the first chamber covers the top of the second chamber, and a reaction chamber is formed between them. A sealing member is installed on the mating surface of the kettle body and the kettle cover assembly for sealing, and they are fixed externally through a connecting flange; the kettle body is provided with a feed channel and a discharge channel, and both the feed channel and the discharge channel communicate with the reaction zone; in the second chamber, a heat insulation block, a heating sheet, a filtering element, and a pressing ring are stacked in sequence from bottom to top; the wire connecting the heating sheet penetrates through the heat insulation block and the bottom of the kettle body, and after being insulated and sealed with the bottom of the kettle body, it extends and is connected to an external heating circuit.

[0008] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a photothermal reaction device with a built-in heating sheet. The heating sheet wires penetrate through the heat insulation block and the bottom of the kettle body, and are insulated and sealed with the bottom of the kettle body and then extended to connect to an external heating circuit. Thus, the structure inside the kettle body is compact, the wire layout is reasonable, a way of leading out wires under high temperature and high pressure conditions is provided, and the structure is simple and the seal is firm.

[0009] Further, a wire mounting seat extends downward corresponding to the position of the wire at the bottom of the kettle body. Two groups of juxtaposed wire channels are formed on the wire mounting seat. The first end of each group of wire channels is communicated with the second chamber and corresponds to the position of the wire through hole arranged on the heat insulation block. The wire has a high-temperature resistant insulating paint layer, and the other end thereof passes through the second end of the wire channel and forms a seal through its cooperation with the first annular seal; or the wire is sequentially sleeved with a wire blind hole tube and a high-temperature resistant insulating tube from inside to outside and forms a seal with the first annular seal. By adopting this solution, the insulation and sealing performance between the heating sheet wire and the bottom of the kettle body are ensured. The insulating tube can be made of Peek material.

[0010] One end of the wire blind hole tube forms a blind hole installation with the heating sheet (that is, one end of the wire is sealed with the electrical connection joint of the heating sheet, such as being fixed after two U-shaped parts are inserted, or two other shaped parts are inserted to form a closed structure). The open end of the wire blind hole tube is connected to the wire circuit, and a certain heat dissipation effect can be achieved by extending the length of the wire blind hole tube.

[0011] Further, it further includes a first plug with a through hole. A first annular seal groove is provided at the second end of each wire channel. The first annular seal is installed in the first annular seal groove. The first plug is inserted into the wire channel and sealed and fixed with the first annular seal. The other end of the wire connecting the heating sheet passes through the through hole of the first plug and is connected to an external heating circuit.

[0012] Further, the first annular seal groove is tapered along the axial direction of the wire channel, and the taper of the first annular seal is in sealing cooperation with the first annular seal groove. The taper range is 20-35°.

[0013] Through the above heat insulation structure design of the present invention, the temperature at the sealing member where the kettle body and the kettle cover assembly are fitted is lower than 310 °C, the temperature at the first annular seal and the insulating tube does not exceed 260 °C, and the temperature in the reaction zone can reach 650 °C. Thus, by using an internal heat source, the power consumption is reduced and the energy is saved under the condition of obtaining the same temperature. That is, the second object is achieved: on the premise that the temperature in the reaction zone is high, the temperature in the non-reaction zone is relatively low, reducing the energy consumption.

[0014] The third object of the present invention is to provide a photothermal reaction device to solve the technical problem of in-situ temperature measurement. That is, a photothermal reaction device provided by the present invention further includes a temperature sensor S. A mounting seat for fixing the temperature sensor S is formed at the bottom of the kettle body corresponding to the reaction zone. A through hole is provided on the mounting seat. The temperature sensor S passes through the through hole and is fixed to the mounting seat. The end with the temperature sensing head thereof sequentially passes through the sensor channel opened at the bottom of the kettle body, the guiding tube provided in the middle of the heat insulation block, the middle of the heating sheet and reaches the bottom of the filter element. Thus, the temperature sensor probe is directly inserted into the bottom of the filter element to directly measure the temperature of the reaction zone, ensuring the accuracy of experimental data.

[0015] Furthermore, it further includes a second plug with a through hole. A second annular sealing groove is formed in the mounting seat. The second annular sealing groove is tapered axially from the inside to the outside along the through hole, and a second annular sealing member adapted to its shape is installed therein. The second plug is inserted into the through hole and is hermetically fixed to the second annular sealing member. The temperature sensing head end of the temperature sensor S sequentially passes through the through hole of the second plug and is fixed thereto. Thus, the sealing performance of the sensor position is ensured, which is convenient for replacement.

[0016] The fourth object of the present invention is to provide a photothermal reaction device to solve the problem that any one phase, any two phases, or three phases of solid, liquid, and gas can react simultaneously under photothermal conditions.

[0017] First, the cross-sections of the first chamber and the second chamber are both circular, and the diameter of the first chamber is larger than that of the second chamber; a liquid storage tank is provided around the second chamber at the top of the kettle body, and the liquid storage tank is within the range covered by the first chamber; an upwardly open mounting groove is defined at the top of the heat insulation block, and the side wall of the mounting groove forms a lateral heat insulation structure together with the liquid storage tank. Among them, a heating sheet and a filter element are stacked in sequence in the mounting groove. An insulating cavity communicating with the reaction zone is formed between the bottom end surface of the heat insulation block and the bottom of the second chamber, thereby reducing the heat transfer path area reaching the outside, effectively reducing the temperature reaching the seal and the insulating tube. The liquid storage tank can not only store the liquid required for the reaction, but also, due to the existence of the liquid storage tank, the liquid or cavity inside and the side wall of the mounting groove further form a lateral sealing structure, ensuring that the temperature at the seal is lower than that of the reaction zone, and at the same time, the distance between the seal and the reaction zone can be appropriately adjusted. The farther the distance, the lower the temperature.

[0018] Second, the feed channel passes through the bottom of the kettle body, the gas path channel provided between the seal and the liquid storage tank around the top surface of the kettle body, the liquid storage tank and reaches the reaction zone. The cross-sectional area of the gas path channel gradually increases from the end close to the feed channel to the end far from the feed channel; the discharge channel vertically extends from the bottom of the filter element to before the second annular seal in the sensor channel and communicates with the discharge port provided at the bottom of the kettle body. This is conducive to the air flow flowing to the large gap, thereby adjusting the air flow direction and flow rate so that the air flow can uniformly pass through the reaction zone (microporous membrane and filter).

[0019] Further, a ferrule and a third plug with both ends penetrating therethrough are provided at the feed end of the feed channel and the discharge end of the discharge channel.

[0020] Further, the filter element includes a filter sheet and a microporous membrane adapted to its shape; the filter sheet is fixed in the installation groove, and the microporous membrane is attached to the top of the filter sheet for placing solid reactants and / or absorbing the gas volatilized in the liquid storage tank;

[0021] Alternatively, the filter element includes a filter sheet and a microporous membrane. The filter sheet is fixed in the installation groove, and the microporous membrane is attached to the top of the filter sheet, on which there is a drainage strip extending into the liquid storage tank; this facilitates the rapid entry of the reaction solution into the reaction zone.

[0022] The reaction device provided by the present invention can carry out reactions involving solids, liquids, and gases, with light and heat participating simultaneously. The built-in heat source is a heating sheet, and the temperature measurement is carried out by a temperature sensor closely attached to the reaction zone, achieving in-situ temperature measurement to the greatest extent. The gas flow enters the reaction zone through the micro-gap between the kettle body and the kettle cover assembly via the feed channel, and exits through the middle hole, making the gas flow through the reaction zone more uniform. The liquid storage tank provided on the kettle body can store the reaction solution, and the reaction solution can enter the reaction zone through the liquid absorption effect of the microporous membrane. The solids can be evenly distributed on the microporous membrane, and the light source enters the reaction zone through the light window. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings according to the provided drawings without creative efforts.

[0024] Figure 1 and Figure 2 The drawing is a three-dimensional view of a photothermal reaction device provided by the present invention;

[0025] Figure 3 The drawing is a bottom view of a photothermal reaction device provided by the present invention;

[0026] Figure 4 The drawing is the A-A cross-sectional view of Attachment Figure 3 ;

[0027] Figure 5 The drawing is the B-B cross-sectional view of Attachment Figure 3 ;

[0028] Figure 6 The drawing is the partial enlarged schematic view of Attachment Figure 4 (the arrow direction represents the gas flow direction);

[0029] Figure 7 The accompanying drawing is a top view of the kettle body;

[0030] In the figure: 100 - kettle cover assembly, 101 - optical window, 200 - kettle body, 201 - heat insulation block, 2011 - guide tube, 2012 - heat insulation side plate, 202 - heating sheet, 203 - filter element, 2031 - filter sheet, 2032 - microporous membrane, 204 - first annular seal, 205 - insulating tube, 206 - liquid storage tank, 207 - pressure ring, 208 - wire, 209 - gas path channel, 300 - connecting flange, 400 - wire mounting seat, 401 - first plug, 500 - mounting seat, 501 - second annular seal, 502 - second plug, 503 - third plug, 600 - ferrule, 700 - cavity, 800 - feed channel, 900 - discharge channel, S - temperature sensor. Detailed implementation manners

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0033] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected with", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include contact between the first and second features through additional features therebetween rather than direct contact. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0035] See the attached Figures 1-5 , in an embodiment of a photothermal reaction device provided by the present invention, it includes:

[0036] A kettle lid assembly 100, a first chamber with a downward-facing opening is defined inside the kettle lid assembly 100, and a light window 101 is provided at the top of the first chamber;

[0037] A kettle body 200, a second chamber with an upward-facing opening is defined at the top of the kettle body 200, and the first chamber covers the top of the second chamber, a reaction chamber is formed therebetween, a sealing member is installed on the mating surface of the kettle body 200 and the kettle lid assembly 100 for sealing and the outside is fixed through a connecting flange 300; the kettle body 200 is provided with a feed channel 800 and a discharge channel 900, both the feed channel 800 and the discharge channel 900 communicate with the reaction zone; heat insulation blocks 201, heating sheets 202, filter elements 203 and pressure rings 207 are stacked in sequence from the bottom to the top inside the second chamber; a wire 208 connecting the heating sheet 202 penetrates through the heat insulation block 201 and the bottom of the kettle body 200, and after being insulated and sealed with the bottom of the kettle body 200, it extends and is connected to an external heating circuit.

[0038] The present invention discloses a photothermal reaction device with a built-in heating sheet, the heating sheet wire penetrates through the heat insulation block and the bottom of the kettle body, and after being insulated and sealed with the bottom of the kettle body, it extends and is connected to an external heating circuit, thereby making the structure inside the kettle body compact, the wire layout reasonable, providing a way to lead out the wire under high temperature and high pressure conditions, with a simple structure and firm sealing.

[0039] Wherein the kettle lid assembly includes a kettle lid, a top sealing member, a high-temperature resistant optical glass and a high-temperature resistant gasket, the kettle lid is sequentially placed with the top sealing member, the high-temperature resistant optical glass and the high-temperature resistant gasket (made of peek or graphite), and then clamped tightly with a kettle lid retaining ring. In the present invention, the heat insulation block can be made of a fiberglass board.

[0040] Advantageously, a wire mounting seat 400 extends downward corresponding to the position of the wire 208 at the bottom of the kettle body 200. Two groups of juxtaposed wire channels are formed on the wire mounting seat 400. The first end of each group of wire channels is communicated with the second chamber and corresponds to the position of the wire perforation arranged on the heat insulation block 201. The wire 208 has a high-temperature resistant insulating paint layer, and the other end thereof passes through the second end of the wire channel and forms a seal through its cooperation with the first annular seal 204; or the wire 208 is sequentially sleeved with a wire blind hole tube and a high-temperature resistant insulating tube 205 from inside to outside and forms a seal in cooperation with the first annular seal 204. Thus, the sealing performance between the heating element wire and the bottom of the kettle body is ensured.

[0041] One end of the wire blind hole tube forms a blind hole installation with the heating element (that is, one end of the wire is sealed with the electrical connection joint of the heating element, such as being fixed after two U-shaped parts are inserted, or two other shaped parts are inserted to form a closed structure). The open end of the wire blind hole tube is electrically connected to the wire circuit, and a certain heat dissipation effect can be achieved by extending the length of the wire blind hole tube.

[0042] In an embodiment of the present invention, it further includes a first plug 401 having a through hole. A first annular seal groove is provided at the second end of each wire channel. The first annular seal 204 is installed in the first annular seal groove. The first plug 401 is inserted into the wire channel and sealed and fixed with the first annular seal 204. The other end of the wire 208 connecting the heating element 202 passes through the through hole of the first plug 401 and is connected to an external heating circuit. Thus, it is convenient for heat insulation and sealing of the wire and also convenient for replacement of the wire.

[0043] In another embodiment provided by the present invention, the first annular seal groove is tapered along the axial direction of the wire channel, and the taper of the first annular seal 204 is in sealing cooperation with the first annular seal groove; the taper range is 20 - 35°.

[0044] In some other embodiments of the present invention, a high-temperature resistant insulating tube 205 is sleeved on the wire of the heating element 202; the insulating tube can be made of Peek material.

[0045] Advantageously, a heat insulation cavity 700 communicated with the reaction zone is formed between the bottom end surface of the heat insulation block 201 and the bottom of the second chamber.

[0046] Through the above-mentioned heat insulation structure design set of each embodiment of the present invention, the temperature at the sealing member where the kettle body and the kettle cover assembly are fitted is lower than 310 °C, the temperature at the first annular seal and the insulating tube does not exceed 260 °C, and the temperature in the reaction zone can reach 650 °C. Thus, by using an internal heat source, the power consumption is reduced and the energy is saved while obtaining the same temperature. That is, on the premise that the temperature in the reaction zone can reach a high temperature, the temperature in the non-reaction zone is relatively low, reducing the energy consumption.

[0047] See the appendix Figure 3 and 4 In some other embodiments of the present invention, a temperature sensor S is further included. A mounting seat 500 for fixing the temperature sensor S is formed at the bottom of the kettle body 200 corresponding to the reaction zone position. A through hole is provided on the mounting seat 500. The temperature sensor S passes through the through hole and is fixed to the mounting seat 500. One end with a temperature sensing head thereof sequentially passes through a sensor channel opened at the bottom of the kettle body 200, a guide tube 2011 provided in the middle of the heat insulation block 201, and the middle of the heating sheet 202 to the bottom of the filter element 203. Thus, the temperature sensing head of the temperature sensor is directly inserted into the bottom of the filter element, directly measuring the temperature of the reaction zone and ensuring the accuracy of experimental data.

[0048] Advantageously, a second plug 502 with a through hole is further included. A second annular sealing groove is formed in the mounting seat 500. The second annular sealing groove is tapered axially from the inside to the outside along the through hole, and a second annular sealing member 501 adapted to its shape is installed therein. The second plug 502 is inserted into the through hole and is hermetically fixed to the second annular sealing member 501. The temperature sensing head end of the temperature sensor S sequentially passes through the through hole of the second plug 502 and is fixed thereto. Thus, the sealing performance of the sensor position is ensured and it is convenient to replace.

[0049] In another embodiment of the present invention, the cross sections of the first chamber and the second chamber are both circular, and the diameter of the first chamber is larger than that of the second chamber; a liquid storage tank 206 is provided around the second chamber at the top of the kettle body 200, and the liquid storage tank 206 is within the covering range of the first chamber; an upwardly open mounting groove is defined at the top of the heat insulation block 201. A side heat insulation structure is formed by the side wall of the mounting groove and the liquid storage tank 206. The heating sheet 202 and the filter element 203 are stacked in the mounting groove in sequence. The side wall of the mounting groove forms a heat insulation side plate 2012, and the thickness of the heat insulation side plate 2012 is less than the thickness value of the bottom plate of the mounting groove.

[0050] The liquid storage tank can not only store the liquid required for the reaction, but also, due to the existence of the liquid storage tank, the liquid or cavity inside further forms a side sealing structure with the side wall of the mounting groove, ensuring that the temperature at the seal is lower than that of the reaction zone, and at the same time, the distance between the seal and the reaction zone can be appropriately adjusted. The farther the distance, the lower the temperature.

[0051] Advantageously, see the appendix Figure 6 and 7, the feed channel 800 passes through the bottom of the kettle body 200, the gas path channel 209 annularly arranged between the seal and the liquid storage tank 206 on the top surface of the kettle body 200, and the liquid storage tank 206 to the reaction zone. The cross-sectional area of the gas path channel 209 gradually increases from the end close to the feed channel 800 to the end far from the feed channel 800; the discharge channel 900 vertically extends through the bottom of the filter element 203 to before the second annular seal 501 in the sensor channel, and is communicated with the discharge port opened at the bottom of the kettle body 200.

[0052] It is beneficial for the air flow to flow towards the large gap, so as to adjust the air flow direction and velocity, and enable the air flow to uniformly pass through the reaction zone (microporous membrane and filter).

[0053] Among them, a ferrule 600 and a third plug 503 with both ends penetrating are provided at the feed end of the feed channel 800 and the discharge end of the discharge channel 900.

[0054] In the above embodiments, one form of the filter element 203 includes a filter sheet 2031 and a microporous membrane 2032 adapted to its shape; the filter sheet 2031 is fixed in the installation groove, and the microporous membrane 2032 is attached to the top of the filter sheet 2031, and is used to place solid reactants and / or absorb the volatilized gas in the liquid storage tank 206; the solid reactants are placed on the microporous membrane, and the microporous membrane is a fiber membrane with a certain adsorption effect.

[0055] Another form of the filter element 203 includes a filter sheet 2031 and a microporous membrane 2032. The filter sheet 2031 is fixed in the installation groove, and the microporous membrane 2032 is attached to the top of the filter sheet 2031, and it has a drainage strip extending into the liquid storage tank 206. It is beneficial for the reaction liquid to quickly enter the reaction zone.

[0056] The reaction device provided by the present invention can carry out reactions involving solids, liquids, and gases, with light and heat participating simultaneously. The built-in heat source is a heating sheet, and the temperature measurement is through a temperature sensor closely attached to the reaction zone, achieving in-situ temperature measurement to the greatest extent. The air flow enters the reaction zone through the micro-gap between the kettle body and the kettle cover assembly via the feed channel, and exits through the middle hole, making the air flow pass through the reaction zone more evenly. The liquid storage tank provided on the kettle body can store the reaction liquid, the reaction liquid can enter the reaction zone through the microporous membrane, the solids can be evenly distributed on the microporous membrane, and the light source enters the reaction zone through the light window.

[0057] Therefore, the present invention provides a novel photothermal reaction device that integrates gas, liquid, and solid phases and can react simultaneously under light and heat conditions. Through reasonable insulation structure design and gas path structure design, and by using an internal heat source, the reaction device reduces power consumption and saves energy while obtaining the same temperature. Moreover, through in-situ temperature measurement inside, the accuracy of experimental data is ensured. The device has a simple structure, is easy to produce, has a low cost, high working efficiency, a wide range of working conditions, and realizes a wire lead-out method under high-temperature and high-pressure conditions. This method has a simple structure, firm sealing, and is easy to replace.

[0058] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0059] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A photothermal reaction device, characterized in that, it includes: A kettle cover assembly (100), a first chamber with a downward opening is defined inside the kettle cover assembly (100), and a light window (101) is provided at the top of the first chamber; A kettle body (200), a second chamber with an upward opening is defined at the top of the kettle body (200), and the first chamber covers the top of the second chamber, and a reaction chamber is formed between the two. A sealing member is installed on the mating surface of the kettle body (200) and the kettle cover assembly (100) for sealing, and the outside is fixed by a connecting flange (300); the kettle body (200) is provided with a feed channel (800) and a discharge channel (900), and both the feed channel (800) and the discharge channel (900) communicate with the reaction zone; inside the second chamber, a heat insulation block (201), a heating sheet (202), a filter element (203) and a pressing ring (207) are stacked in sequence from bottom to top; the wire (208) connecting the heating sheet (202) penetrates through the heat insulation block (201) and the bottom of the kettle body (200), and after being insulated and sealed with the bottom of the kettle body (200), it extends and is connected to an external heating circuit; It further includes a temperature sensor (S), an installation seat (500) for fixing the temperature sensor (S) is formed at the bottom of the kettle body (200) corresponding to the reaction zone position, and a through hole is provided on the installation seat (500); A second annular sealing groove is formed inside the installation seat (500), the second annular sealing groove is tapered along the axial direction of the through hole from inside to outside, and a second annular sealing member (501) with a shape adapted to it is installed inside; A liquid storage tank (206) is provided around the second chamber at the top end of the kettle body (200); The feed channel (800) passes through the bottom of the kettle body (200), the gas path channel (209) formed on the top surface of the kettle body (200) and looped between the sealing member and the liquid storage tank (206), the liquid storage tank (206) to the reaction zone, and the cross-sectional area of the gas path channel (209) gradually increases from the end close to the feed channel (800) to the end far from the feed channel (800); the discharge channel (900) vertically extends to before the second annular sealing member (501) through the bottom of the filter element (203), and is communicated with a discharge port formed at the bottom of the kettle body (200); Wherein, the heat insulation block (201) is made of a glass fiber board.

2. The photothermal reaction device according to claim 1, characterized in that, At the bottom of the kettle body (200), a wire mounting seat (400) extends downward corresponding to the position of the wire (208). Two groups of juxtaposed wire channels are formed on the wire mounting seat (400). The first end of each group of wire channels communicates with the second chamber and corresponds to the position of the wire perforation arranged on the heat insulation block (201). The wire (208) has a high-temperature resistant insulating paint layer, and the other end thereof passes through the second end of the wire channel and forms a seal through its cooperation with the first annular seal (204); or the wire (208) is sequentially sleeved with a wire blind hole tube and a high-temperature resistant insulating tube (205) from inside to outside and forms a seal in cooperation with the first annular seal (204).

3. A solar thermal reaction device according to claim 2, characterized in that, it further includes a first plug (401) having a through hole. A first annular seal groove is provided at the second end of each wire channel. The first annular seal (204) is installed in the first annular seal groove. The first plug (401) is inserted into the wire channel and sealed and fixed with the first annular seal (204). The other end of the wire (208) connecting the heating sheet (202) passes through the through hole of the first plug (401) and is connected to an external heating circuit.

4. A solar thermal reaction device according to claim 3, characterized in that, the first annular seal groove is tapered along the axial direction of the wire channel, and the taper of the first annular seal (204) is in sealing cooperation with the first annular seal groove.

5. A solar thermal reaction device according to claim 4, characterized in that, the temperature sensor (S) passes through the through hole and is fixed to the mounting seat (500). The end thereof with the temperature sensing head sequentially passes through the sensor channel opened at the bottom of the kettle body (200), the guiding tube (2011) arranged in the middle of the heat insulation block (201) and the middle of the heating sheet (202) to the bottom of the filter element (203).

6. A solar thermal reaction device according to claim 5, characterized in that, it further includes a second plug (502) having a through hole. The second plug (502) is inserted into the through hole and sealed and fixed with the second annular seal (501). The temperature sensing head end of the temperature sensor (S) sequentially passes through the through hole of the second plug (502) and is fixed thereto.

7. A solar thermal reaction device according to claim 6, characterized in that, The cross-sections of the first chamber and the second chamber are both circular, and the diameter of the first chamber is larger than that of the second chamber; the liquid storage tank (206) is within the range covered by the first chamber; the top of the heat insulation block (201) defines a mounting groove with an upward opening, and the side wall of the mounting groove forms a lateral heat insulation structure together with the liquid storage tank (206), wherein the heating sheet (202) and the filter element (203) are stacked in sequence in the mounting groove, and a heat insulation cavity (700) communicating with the reaction zone is formed between the bottom end surface of the heat insulation block (201) and the bottom of the second chamber.

8. A photothermal reaction device according to claim 1, characterized in that a ferrule (600) and a third plug (503) with both ends penetrating through it are provided at the feeding end of the feeding channel (800) and the discharging end of the discharging channel (900).

9. A photothermal reaction device according to claim 7, characterized in that the filter element (203) includes a filter sheet (2031) and a microporous membrane (2032) adapted to its shape; the filter sheet (2031) is fixed in the mounting groove, and the microporous membrane (2032) is attached to the top of the filter sheet (2031) for placing solid reactants and / or absorbing the volatilized gas in the liquid storage tank (206); or, the filter element (203) includes a filter sheet (2031) and a microporous membrane (2032), the filter sheet (2031) is fixed in the mounting groove, the microporous membrane (2032) is attached to the top of the filter sheet (2031), and it has a drainage strip extending into the liquid storage tank (206).

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