CN111921473A

CN111921473A - Photo-thermal reaction device

Info

Publication number: CN111921473A
Application number: CN202010838065.9A
Authority: CN
Inventors: 刘欢; 王诗义
Original assignee: Beijing Perfectlight Science And Technology Ltd
Current assignee: Beijing Perfectlight Science And Technology Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2020-11-13

Abstract

The invention relates to a photo-thermal reaction device, which comprises a kettle cover assembly, wherein a first cavity with a downward opening is defined in the kettle cover assembly, and the top of the first cavity is provided with a light window; 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, sealing elements are arranged on the matching surfaces of the kettle body and the kettle cover assembly for sealing, and a feeding channel and a discharging channel on the kettle body are communicated with the reaction zone; a heat insulation block, a heating sheet, a filtering element, a microporous membrane and a pressure ring are sequentially stacked from the bottom to the top in the second chamber; the heating sheet lead penetrates through the heat insulation block and the bottom of the kettle body, and extends and is connected to an external heating circuit after being insulated and sealed with the bottom of the kettle body; the kettle body is provided with a temperature sensor mounting seat, a through hole and the like and is used for measuring the temperature of the lower surface of the microporous membrane on the upper part of the filter element. Therefore, the kettle is compact in structure, reasonable in material channel, temperature sensing and lead arrangement, simple in structure and firm in sealing, and a lead leading-out mode under the high-temperature and high-pressure condition is provided.

Description

Photo-thermal reaction device

Technical Field

The invention relates to the technical field of chemical reaction devices, in particular to a photo-thermal reaction device.

Background

Most of the traditional reactors only support external heat supply and external temperature measurement, such as tubular furnaces, the experimental conditions are limited, the energy required to be consumed for reaching the experimental conditions is high, and the experimental conditions and the result precision are poor in guarantee. In order to solve the technical problems, an internal heat supply scheme appears in the prior art, and the internal heat supply scheme has a relatively complex structure, is difficult to produce and process, has a simple structure, but can still achieve limited experimental conditions; meanwhile, in the internal heating scheme, in the aspect of processing the lead-out problems of the lead and the temperature sensor, the schemes of coating high-temperature glue, using a high-temperature-resistant joint and the like are generally adopted, the former scheme is inconvenient to replace and is easy to cause the deviation of the detection of trace substances in the experimental result; the latter also has problems such as insufficient temperature and pressure resistance of the high temperature joint of glass, high price, and the like. Meanwhile, the traditional reaction kettle can only support the reaction under the conditions of single solid, single liquid, single gas or partial combination. Therefore, how to provide a photo-thermal reaction kettle which has a compact structure, perfect functions and long-term sealing without interference, and solves the above problems is a problem to be solved by those skilled in the art.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art.

The first purpose of the invention is to provide a photo-thermal reaction device, which solves the problem of arrangement of heating wires inside a reaction kettle;

to this end, the present invention provides a photothermal reaction device comprising:

the kettle cover assembly is internally provided with a first chamber with a downward opening, and the top of the first chamber is provided with a light window;

the top of the kettle body is limited with a second chamber with an upward opening, the first chamber is covered on the top of the second chamber, a reaction chamber is formed between the first chamber and the second chamber, and sealing elements are arranged on matching surfaces of the kettle body and the kettle cover assembly for sealing and the outer parts of the kettle body and the kettle cover assembly are fixed through connecting flanges; the kettle body is provided with a feeding channel and a discharging channel which are both communicated with the reaction zone; a heat insulation block, a heating sheet, a filter element and a pressure ring are sequentially stacked from the bottom to the top in the second chamber; the wire of connecting the heating plate runs through thermal-insulated piece and cauldron body bottom, and extends to be connected to external heating circuit after sealed with cauldron body bottom insulation.

According to the technical scheme, compared with the prior art, the photothermal reaction device is internally provided with the heating sheet, the heating sheet wire penetrates through the heat insulation block and the bottom of the kettle body, and extends and is connected to an external heating circuit after being insulated and sealed with the bottom of the kettle body, so that the kettle body is compact in structure and reasonable in wire arrangement, and the wire leading-out mode under the conditions of high temperature and high pressure is provided, and the photothermal reaction device is simple in structure and firm in sealing.

Furthermore, the bottom of the kettle body extends downwards corresponding to the position of the wire to form a wire mounting seat, two groups of wire channels which are arranged in parallel are formed on the wire mounting seat, the first end of each group of wire channels is communicated with the second cavity and corresponds to the position of a wire through hole arranged on the heat insulation block, a high-temperature-resistant insulating paint layer is arranged on the wire, and the other end of the wire passes through the second end of the wire channel and is matched with the first annular sealing element to form sealing; or the conducting wire is sequentially sleeved with a conducting wire blind hole pipe and a high-temperature-resistant insulating pipe from inside to outside and is matched with the first annular sealing element to form sealing. By adopting the scheme, the insulating sealing performance of the heating sheet wire and the bottom of the kettle body is ensured. Wherein the insulating tube can be made of a Peek material.

The blind hole installation of wire blind hole pipe one end and heating plate formation (the wire one end adopts sealed mode with heating plate electrical property joint department promptly, if two U-shaped spare grafting after-fixing, or two other shape parts are pegged graft and are formed enclosed construction), wire blind hole pipe open end and wire circuit connection, wherein accessible wire blind hole pipe length extension plays certain radiating effect.

Furthermore, the heating device further comprises a first plug screw with a through hole, a first annular sealing groove is formed in the second end of each wire channel, the first annular sealing element is installed in the first annular sealing groove, the first plug screw is inserted into the wire channel and is fixed with the first annular sealing element in a sealing mode, and the other end of the wire connected with the heating plate penetrates through the through hole of the first plug screw and is connected with an external heating circuit.

Further, the first annular sealing groove is arranged in a conical mode along the axial direction of the wire channel, and the conical degree of the first annular sealing element is in sealing fit with the first annular sealing groove. Wherein the taper is in the range of 20-35 deg..

According to the invention, through the design of the heat insulation structure, the temperature of the sealing element arranged on the matching surface of the kettle body and the kettle cover assembly is lower than 310 ℃, the temperature of the first annular sealing element and the insulating pipe is not more than 260 ℃, and the temperature in the reaction zone can reach 650 ℃, so that by using an internal heat source, under the condition of obtaining the same temperature, the power consumption is reduced, and the energy is saved. The second purpose is achieved: on the premise of realizing high temperature of the reaction zone, the temperature of the non-reaction zone is lower, and the energy consumption is reduced.

The invention also provides a photothermal reaction device, which solves the technical problem of temperature in-situ measurement, namely the photothermal reaction device provided by the invention further comprises a temperature sensor S, wherein 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 formed in the mounting seat, the temperature sensor S penetrates through the through hole and is fixed with the mounting seat, and one end of the temperature sensor S, which is provided with a temperature sensing head, sequentially penetrates through a sensor channel arranged at the bottom of the kettle body, a guide pipe arranged in the middle of a heat insulation block and the middle of a heating sheet to the bottom of a filter element. Therefore, the probe of the temperature sensor is directly inserted into the bottom of the filter element, the temperature of the reaction zone is directly measured, and the accuracy of experimental data is ensured.

Furthermore, the temperature sensing device also comprises a second plug screw with a through hole, a second annular sealing groove is formed in the mounting base, the second annular sealing groove is arranged in a conical mode from inside to outside along the axial direction of the through hole, a second annular sealing piece matched with the second annular sealing piece in shape is installed in the second annular sealing groove, the second plug screw is inserted into the through hole and is fixed with the second annular sealing piece in a sealing mode, and the temperature sensing head end of the temperature sensor S sequentially penetrates through the through hole of the second plug screw and is fixed with the second plug screw. Therefore, the sealing performance of the position of the sensor is ensured, and the sensor is convenient to replace.

The fourth purpose of the invention is to provide a photothermal reaction device, which solves the problem that any one phase, any two phases or three phases of solid, liquid and gas can react under the photothermal condition at the same time.

Firstly, 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 arranged at the top end of the kettle body around the second chamber, and the liquid storage tank is positioned in the range covered by the first chamber; the top of the heat insulation block defines a mounting groove with an upward opening, the side wall of the mounting groove forms a lateral heat insulation structure which is formed together with the liquid storage tank, the heating sheet and the filter element are sequentially stacked in the mounting groove, and a heat insulation cavity communicated with the reaction zone is formed between the bottom end face of the heat insulation block and the bottom of the second chamber, so that the heat circulation area which is transmitted to the outside is reduced, and the temperature which reaches the sealing piece and the insulating pipe is effectively reduced. The liquid storage tank can store liquid required by reaction, and the liquid storage tank can further form a lateral sealing structure by the liquid inside or the cavity and the side wall of the mounting groove, so that the temperature of the sealing element is lower than that of the reaction area, the distance from the sealing element to the reaction area can be properly adjusted, and the temperature is lower when the distance is longer.

Secondly, the feeding channel extends to the reaction area through a gas channel and a liquid storage tank which are annularly arranged between the sealing element and the liquid storage tank at the bottom of the kettle body and the top end surface of the kettle body, and the flow section of the gas channel is gradually increased from one end close to the feeding channel to one end far away from the feeding channel; the discharge channel vertically extends to the front of a second annular sealing element in the sensor channel through the bottom of the filter element and is communicated with a discharge hole formed in the bottom of the kettle body. So as to facilitate the air flow to a large gap, thereby adjusting the direction and the flow rate of the air flow and enabling the air flow to uniformly pass through the reaction zone (the microporous membrane and the filter disc).

Furthermore, the feed end of the feed channel and the discharge end of the discharge channel are both provided with a clamping sleeve and a third plug screw which runs through the two ends of the clamping sleeve.

Further, the filter element comprises a filter disc and a microporous membrane matched with the filter disc in shape; the filter disc is fixed in the mounting groove, and the microporous membrane is attached to the top of the filter disc and used for placing solid reactants and/or absorbing gas volatilized in the liquid storage groove;

or, the filter element comprises a filter disc and a microporous film, the filter disc is fixed in the mounting groove, the microporous film is attached to the top of the filter disc, and a drainage strip extending into the liquid storage groove is arranged on the microporous film; the reaction liquid can conveniently and rapidly enter the reaction zone.

The reaction device provided by the invention can carry out solid, liquid and gas reactions with light and heat participating simultaneously, wherein a built-in heat source is a heating plate, temperature measurement is carried out by a temperature sensor tightly attached to a reaction area, in-situ temperature measurement is carried out to the maximum extent, airflow enters the reaction area through a micro-seam between a kettle body and a kettle cover assembly through a feeding channel, the middle hole is used for giving vent to air, so that the airflow is more uniform through the reaction area, a liquid storage tank arranged on the kettle body can store reaction liquid, the reaction liquid can enter the reaction area through the liquid absorption effect of a microporous membrane, solids can be uniformly distributed on the microporous membrane, and a light source enters the reaction area through a light window.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIGS. 1 and 2 are perspective views of a photothermal reaction device according to the present invention;

FIG. 3 is a bottom view of a photothermal reaction device according to the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is an enlarged partial schematic view of FIG. 4 (the direction of the arrows indicate the direction of flow);

FIG. 7 is a top view of the autoclave body;

in the figure: 100-a kettle cover assembly, 101-a light window, 200-a kettle body, 201-a heat insulation block, 2011-a guide pipe, 2012-a heat insulation side plate, 202-a heating sheet, 203-a filter element, 2031-a filter sheet, 2032-a microporous membrane, 204-a first annular sealing element, 205-an insulation pipe, 206-a liquid storage tank, 207-a pressure ring, 208-a lead, 209-a gas path channel, 300-a connecting flange, 400-a lead mounting seat, 401-a first plug screw, 500-a mounting seat, 501-a second annular sealing element, 502-a second plug screw, 503-a third plug screw, 600-a clamping sleeve, 700-a cavity, 800-a feeding channel, 900-a discharging channel and an S-temperature sensor.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-5, in an embodiment of the present invention, there is provided a photothermal reaction apparatus comprising:

the kettle cover assembly 100, a first chamber with a downward opening is defined in the kettle cover assembly 100, and a light window 101 is arranged at the top of the first chamber;

the top of the kettle body 200 is limited with a second chamber with an upward opening, the first chamber is covered on the top of the second chamber, a reaction chamber is formed between the first chamber and the second chamber, and sealing elements are arranged on the matching surfaces of the kettle body 200 and the kettle cover assembly 100 for sealing and the outside is fixed through a connecting flange 300; the kettle body 200 is provided with a feeding channel 800 and a discharging channel 900, and both the feeding channel 800 and the discharging channel 900 are communicated with the reaction zone; a heat insulation block 201, a heating sheet 202, a filter element 203 and a pressure ring 207 are sequentially stacked from the bottom to the top in the second chamber; the lead 208 connected with the heating plate 202 penetrates through the heat insulation block 201 and the bottom of the kettle body 200, and extends and is connected to an external heating circuit after being insulated and sealed with the bottom of the kettle body 200.

The invention discloses a photothermal reaction device, wherein a heating sheet is arranged in the photothermal reaction device, a wire of the heating sheet penetrates through a heat insulation block and the bottom of a kettle body, and is extended and connected to an external heating circuit after being insulated and sealed with the bottom of the kettle body, so that the kettle body has a compact structure and reasonable wire arrangement, a wire leading-out mode under the conditions of high temperature and high pressure is provided, the structure is simple, and the sealing is firm.

The kettle cover assembly comprises a kettle cover, a top sealing element, high-temperature-resistant optical glass and a high-temperature-resistant gasket, wherein the top sealing element, the high-temperature-resistant optical glass and the high-temperature-resistant gasket (made of peek or graphite) are sequentially placed in the kettle cover, and then the kettle cover is clamped by a kettle cover clamping ring. The heat insulation block can adopt a glass fiber plate.

Advantageously, the bottom of the kettle body 200 extends downwards to form a wire installation seat 400 corresponding to the position of the wire 208, two groups of wire channels arranged in parallel are formed on the wire installation seat 400, a first end of each group of wire channels is communicated with the second chamber and corresponds to the position of a wire through hole arranged on the heat insulation block 201, a high temperature resistant insulating paint layer is arranged on the wire 208, and the other end of the high temperature resistant insulating paint layer penetrates through a second end of the wire channel and is matched with the first annular sealing element 204 to form sealing; or the conducting wire 208 is sleeved with a conducting wire blind hole pipe and a high-temperature-resistant insulating pipe 205 from inside to outside in sequence and is matched with the first annular sealing element 204 to form sealing. Therefore, the tightness of the heating plate lead and the bottom of the kettle body is ensured.

In an embodiment of the present invention, the heating device further includes a first plug screw 401 having a through hole, a first annular sealing groove is disposed at a second end of each wire channel, the first annular sealing element 204 is installed in the first annular sealing groove, the first plug screw 401 is inserted into the wire channel and is sealed and fixed with the first annular sealing element 204, and the other end of the wire 208 connected to the heating plate 202 passes through the through hole of the first plug screw 401 and is connected to an external heating circuit. Therefore, the heat insulation and sealing of the lead are facilitated, and the lead is convenient to replace.

In another embodiment provided by the present invention, the first annular seal groove is tapered along the axial direction of the conductor passage, and the first annular seal 204 is tapered to sealingly engage with the first annular seal groove; wherein the taper is in the range of 20-35 deg..

In other embodiments of the present invention, a high temperature resistant insulating tube 205 is sleeved on the conducting wire of the heating plate 202; wherein the insulating tube can be made of a Peek material.

Advantageously, an insulating cavity 700 communicating with the reaction zone is formed between the bottom end face of the insulating block 201 and the bottom of the second chamber.

According to the invention, through the design set of the heat insulation structures of the above embodiments, the temperature of the sealing element arranged on the matching surface of the kettle body and the kettle cover assembly is lower than 310 ℃, the temperature of the first annular sealing element and the insulating pipe is not higher than 260 ℃, and the temperature in the reaction zone can reach 650 ℃, so that by using an internal heat source, under the condition of obtaining the same temperature, the power consumption is reduced, and the energy is saved. The temperature of the non-reaction zone is lower on the premise of realizing the high temperature of the reaction zone, and the energy consumption is reduced.

Referring to fig. 3 and 4, in another embodiment of the present invention, the present invention further includes a temperature sensor S, a mounting seat 500 for fixing the temperature sensor S is formed at a position corresponding to the reaction region at the bottom of the autoclave body 200, a through hole is formed on the mounting seat 500, the temperature sensor S is inserted into the through hole and fixed to the mounting seat 500, and one end of the temperature sensor S having a temperature sensing head sequentially passes through a sensor channel formed at the bottom of the autoclave body 200, a guide tube 2011 formed at the middle of the heat insulation block 201, and the middle of the heating plate 202 to the bottom of the filter element 203. Therefore, the temperature sensing head of the temperature sensor is directly inserted into the bottom of the filter element, the temperature of the reaction zone is directly measured, and the accuracy of experimental data is ensured.

Advantageously, the temperature sensor further comprises a second plug screw 502 having a through hole, a second annular seal groove is formed in the mounting base 500, the second annular seal groove is arranged along the axial direction of the through hole in a tapered manner from inside to outside, a second annular seal 501 matched with the shape of the second annular seal is installed in the second annular seal groove, the second plug screw 502 is inserted into the through hole and is fixed with the second annular seal 501 in a sealing manner, and the temperature sensing head end of the temperature sensor S sequentially passes through the through hole of the second plug screw 502 and is fixed with the second plug screw. Therefore, the sealing performance of the position of the sensor is ensured, and the sensor is convenient to replace.

In another embodiment of the invention, the first chamber and the second chamber are both circular in cross section, and the first chamber diameter is larger than the second chamber diameter; a liquid storage tank 206 is arranged at the top end of the kettle body 200 around the second chamber, and the liquid storage tank 206 is positioned in the covering range of the first chamber; the top of the insulation block 201 defines an upwardly open mounting channel with side walls forming a lateral insulation structure with the sump 206, wherein the heating sheet 202 and the filter element 203 are stacked in series in the mounting channel. The side wall of the installation groove forms a heat insulation side plate 2012, and the thickness of the heat insulation side plate 2012 is smaller than the thickness value of the bottom plate of the installation groove.

The liquid storage tank can store liquid required by reaction, and the liquid storage tank can further form a lateral sealing structure by the liquid inside or the cavity and the side wall of the mounting groove, so that the temperature of the sealing element is lower than that of the reaction area, the distance from the sealing element to the reaction area can be properly adjusted, and the temperature is lower when the distance is longer.

Advantageously, referring to fig. 6 and 7, the feeding channel 800 extends from the bottom of the kettle body 200, the air channel 209 annularly arranged between the sealing member and the liquid storage tank 206 on the top end surface of the kettle body 200, the liquid storage tank 206 to the reaction area, and the flow cross section of the air channel 209 gradually increases from the end close to the feeding channel 800 to the end far away from the feeding channel 800; the outlet channel 900 extends vertically through the bottom of the filter element 203 to the front of the second annular seal 501 in the sensor channel and communicates with the outlet opening at the bottom of the kettle body 200.

The gas flow can flow to a large gap, so that the direction and the flow rate of the gas flow can be adjusted, and the gas flow can uniformly pass through the reaction zone (the microporous membrane and the filter disc).

Wherein, the feed end of the feed channel 800 and the discharge end of the discharge channel 900 are both provided with a cutting sleeve 600 and a third plug screw 503 which runs through the two ends thereof.

In the above embodiments, the filter element 203 is in a form including a filter sheet 2031 and a microporous membrane 2032 adapted to the shape thereof; the filter 2031 is fixed in the mounting groove, and the microporous membrane 2032 is attached to the top of the filter 2031 and is used for holding the solid reactant and/or absorbing the gas volatilized from the reservoir 206; the solid reactant is placed on a microporous membrane, and the microporous membrane is a fiber membrane and has a certain adsorption effect.

The filter element 203 may alternatively be in the form of a filter 2031 and a microporous membrane 2032, the filter 2031 being secured within the mounting channel and the microporous membrane 2032 being attached to the top of the filter 2031 and having a drainage strip extending into the sump 206. The reaction liquid can enter the reaction zone quickly.

The reaction device provided by the invention can carry out solid, liquid and gas reactions with light and heat participating simultaneously, wherein a built-in heat source is a heating plate, temperature measurement is carried out by a temperature sensor tightly attached to a reaction area, in-situ temperature measurement is carried out to the maximum extent, airflow enters the reaction area through a micro-seam between a kettle body and a kettle cover assembly through a feeding channel, the middle hole is used for giving vent to air, so that the airflow is more uniform through the reaction area, a liquid storage tank arranged on the kettle body can store reaction liquid, the reaction liquid can enter the reaction area through a microporous membrane, solids can be uniformly distributed on the microporous membrane, and a light source enters the reaction area through a light window.

The invention provides a novel photo-thermal reaction device which has three phases of gas collection, liquid and solid and can simultaneously carry out reaction under the conditions of light and heat. The reaction device reduces power consumption and saves energy by reasonable heat insulation structural design and gas path structural design and by using an internal heat source under the condition of obtaining the same temperature. And the accuracy of experimental data is ensured through internal in-situ temperature measurement. The device and the structure are simple, the production is easy, the cost is low, the working efficiency is high, the working condition range is large, the wire leading-out mode under the high-temperature and high-pressure condition is structurally realized, and the mode has the advantages of simple structure, firm sealing and easy replacement.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A photothermal reaction device comprising:

the 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 arranged at the top of the first chamber;

the reaction kettle comprises a kettle body (200), wherein a second chamber with an upward opening is defined at the top of the kettle body (200), the first chamber is covered at the top of the second chamber, a reaction chamber is formed between the first chamber and the second chamber, sealing elements are arranged on matching surfaces of the kettle body (200) and the kettle cover assembly (100) for sealing, and the outside of the kettle body is fixed through a connecting flange (300); the kettle body (200) is provided with a feeding channel (800) and a discharging channel (900), and the feeding channel (800) and the discharging channel (900) are both communicated with the reaction zone; a heat insulation block (201), a heating sheet (202), a filter element (203) and a pressure ring (207) are sequentially stacked from the bottom to the top in the second chamber; and a lead (208) connected with the heating sheet (202) penetrates through the heat insulation block (201) and the bottom of the kettle body (200), and extends and is connected to an external heating circuit after being insulated and sealed with the bottom of the kettle body (200).

2. The photothermal reaction device according to claim 1, wherein the bottom of the kettle body (200) extends downwards corresponding to the position of the wire (208) to form a wire mounting seat (400), two sets of wire channels arranged side by side are formed on the wire mounting seat (400), a first end of each set of wire channel is communicated with the second chamber and corresponds to the position of the wire through hole arranged on the heat insulation block (201), the wire (208) is provided with a high temperature resistant insulating paint layer, and the other end of the wire channel passes through the second end of the wire channel and forms a seal by matching with the first annular sealing element (204); or the lead (208) is sequentially sleeved with a lead blind hole pipe and a high-temperature-resistant insulating pipe (205) from inside to outside and is matched with the first annular sealing element (204) to form sealing.

3. The photothermal reaction device according to claim 2, further comprising a first plug screw (401) having a through hole, wherein a first annular sealing groove is disposed at the second end of each of the lead channels, the first annular sealing element (204) is mounted in the first annular sealing groove, the first plug screw (401) is inserted into the lead channel and is sealed and fixed with the first annular sealing element (204), and the other end of the lead wire (208) connected to the heating plate (202) passes through the through hole of the first plug screw (401) to be connected to an external heating circuit.

4. The photothermal reaction device according to claim 3, wherein said first annular sealing groove is tapered along the axial direction of said wire passage, and said first annular sealing member (204) is tapered to sealingly engage with said first annular sealing groove.

5. The photothermal reaction device according to claim 4, further comprising a temperature sensor (S), wherein a mounting seat (500) for fixing the temperature sensor (S) is formed at the bottom of the kettle body (200) corresponding to the reaction region, a through hole is formed on the mounting seat (500), the temperature sensor (S) penetrates through the through hole and is fixed to the mounting seat (500), and one end of the temperature sensor (S) having a temperature sensing head sequentially penetrates through a sensor channel formed at the bottom of the kettle body (200), a guide tube (2011) arranged at 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. The photothermal reaction device according to claim 5, further comprising a second plug screw (502) having a through hole, wherein a second annular sealing groove is formed in the mounting seat (500), the second annular sealing groove is tapered from inside to outside along the axial direction of the through hole, and a second annular sealing element (501) adapted to the shape of the second annular sealing element is installed in the second annular sealing groove, the second plug screw (502) is inserted into the through hole and is sealed and fixed with the second annular sealing element (501), and the temperature sensing head end of the temperature sensor (S) sequentially passes through and is fixed with the through hole of the second plug screw (502).

7. The photothermal reaction device according to claim 6, wherein said first chamber and said second chamber are circular in cross section, and said first chamber diameter is larger than said second chamber diameter; a liquid storage tank (206) is arranged at the top end of the kettle body (200) and surrounds the second chamber, and the liquid storage tank (206) is located in the range covered by the first chamber; the top of the heat insulation block (201) defines a mounting groove with an upward opening, the side wall of the mounting groove forms a lateral heat insulation structure which is formed together with the liquid storage tank (206), wherein the heating sheet (202) and the filter element (203) are sequentially stacked in the mounting groove, and a heat insulation cavity (700) which is 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.

8. The photothermal reaction device according to claim 7, wherein said feeding channel (800) is connected to said reaction zone through said bottom of said kettle body (200), said air channel (209) disposed between said sealing member and said liquid storage tank (206) at the top end face of said kettle body (200), said liquid storage tank (206), said air channel (209) having a gradually increasing flow cross section from the end close to said feeding channel (800) to the end far away from said feeding channel (800); the discharge channel (900) vertically extends to the front of the second annular sealing element (501) in the sensor channel through the bottom of the filter element (203) and is communicated with a discharge hole formed in the bottom of the kettle body (200).

9. The photothermal reaction device according to claim 8, wherein said feeding end of said feeding channel (800) and said discharging end of said discharging channel (900) are provided with a ferrule (600) and a third screw plug (503) penetrating both ends thereof.

10. A photothermal reaction device according to claim 9, wherein said filter element (203) comprises a filter sheet (2031) and a microporous membrane (2032) adapted to its shape; the filter disc (2031) is fixed in the installation groove, and the microporous membrane (2032) is attached to the top of the filter disc (2031) and is used for placing solid reactants and/or absorbing volatile gas in the liquid storage groove (206);

or, the filter element (203) comprises a filter disc (2031) and a microporous membrane (2032), the filter disc (2031) is fixed in the mounting groove, the microporous membrane (2032) is attached to the top of the filter disc (2031), and a drainage strip extending into the reservoir (206) is arranged on the microporous membrane.