CN113867445A - Rapid heating system based on condensing heating and thermogravimetric analysis method - Google Patents
Rapid heating system based on condensing heating and thermogravimetric analysis method Download PDFInfo
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- CN113867445A CN113867445A CN202111127686.7A CN202111127686A CN113867445A CN 113867445 A CN113867445 A CN 113867445A CN 202111127686 A CN202111127686 A CN 202111127686A CN 113867445 A CN113867445 A CN 113867445A
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
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Abstract
The invention relates to a rapid heating system based on condensing heating and a thermogravimetric analysis method. The rapid heating system comprises a reaction tank, a support piece, an electronic weighing device, a heating bin, a light gathering device, a temperature detector and a terminal host, wherein the heating bin is arranged above the electronic weighing device and is provided with an air inlet and an air outlet, the support piece is supported on a weighing surface of the electronic weighing device, the upper part of the support piece extends into the heating bin, the reaction tank is placed in the heating bin and is arranged on the upper part of the support piece, the light gathering device is arranged on the bin wall of the heating bin, the light emitted by the light gathering device faces the reaction tank, the detection end of the temperature detector is in contact with the reaction tank, and the terminal host is respectively electrically connected with the electronic weighing device, the light gathering device and the temperature detector. The advantages are that: the temperature regulation and control of local wide temperature interval and wide rate of rise is realized to accessible spotlight heating method to can realize the real-time regulation and control of temperature, satisfy the accurate control of heating overall process, can set up multistage intensification procedure, satisfy multiple intensification process demand.
Description
Technical Field
The invention relates to the field of light-gathering heating, in particular to a rapid heating system based on light-gathering heating and a thermogravimetric analysis method.
Background
The reactivity, products and the like of materials under slow temperature rise and fast temperature rise are often greatly different, and the demand of a fast temperature rise system in various research and production is more and more increased along with the development of scientific research and production needs.
At present, some enterprises and organizations adopt a light-gathering heating mode to realize rapid temperature rise, which can reach high temperature of about 1200 ℃ and a temperature rise rate of 500 ℃/min, but still have some defects: firstly, the reaction temperature is controlled by adjusting the luminous flux, so that the accuracy of temperature control is influenced; secondly, a control method for the heating rate is lacked, and only quick heating can be ensured, but constant-rate heating cannot be ensured; and thirdly, the acquisition of material weight information is lacked, and related research cannot be carried out.
In addition, the conventional thermogravimetric analyzer can only aim at the reaction with the heating rate of less than 100 ℃/min, cannot be used for rapid heating, and has insufficient accuracy for reaction measurement of materials at higher temperature. At present, thermogravimetric analysis methods adopting modes of special resistance wires, infrared heating, microwave heating and the like are adopted, but the heating rate of the special resistance wire heating is limited, generally does not exceed 200 ℃/min, and the manufacturing cost is expensive; the infrared heating mode is easily affected by the smoke generated in the reaction process; microwave heating is easy to reach higher temperature and heating rate, but regulation and control in the reaction are very difficult.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rapid heating system based on light-gathering heating and a thermogravimetric analysis method, and effectively overcoming the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a rapid heating system based on light gathering heating comprises a reaction tank, a support piece, an electronic weighing device, a heating bin, a light gathering device, a temperature detector and a terminal host, wherein the heating bin is arranged above the electronic weighing device and provided with an air inlet and an air outlet, the support piece is supported on a weighing surface of the electronic weighing device, the upper portion of the support piece extends into the heating bin, the reaction tank is placed in the heating bin and arranged on the upper portion of the support piece, the light gathering device is arranged on a bin wall of the heating bin, light emitted by the light gathering device is gathered and then faces the reaction tank, a detection end of the temperature detector is in contact with the reaction tank, and the terminal host is electrically connected with the electronic weighing device, the light gathering device and the temperature detector respectively.
On the basis of the technical scheme, the invention can be further improved as follows.
The temperature raising device comprises a temperature raising bin, a reaction tank and a camera device, wherein the temperature raising bin is provided with a transparent shooting area at the top corresponding to the reaction tank, the camera device is assembled at the shooting area at the top of the temperature raising bin and used for monitoring and shooting the picture information of the reaction tank through the shooting area, and the camera device is electrically connected with the terminal host.
The temperature raising bin is assembled at the upper end of the anti-interference cover.
Further, the warming bin comprises a warming shell and a sealing cover, the upper end and the lower end of the warming shell are both open, the lower end of the warming shell is connected with the upper end of the anti-interference cover in a sealing mode, the sealing cover is of a shell structure with the lower end open, the lower end of the sealing cover is connected with the upper end of the warming shell in a sealing mode, the side wall of the warming shell is provided with the air outlet hole, the upper portion of the sealing cover is provided with the air inlet hole, and the light gathering device is assembled on the sealing cover.
Further, an annular first flange is arranged at the upper end of the interference prevention cover, an annular second flange is arranged at the lower end of the temperature rise shell, the second flange is arranged at the upper end of the first flange, and a first sealing gasket is clamped between the first flange and the second flange; an annular third flange is arranged at the upper end of the warming shell, an annular fourth flange is arranged at the lower end of the sealing cover, the fourth flange is arranged at the upper end of the third flange, and a second sealing washer is clamped between the fourth flange and the third flange.
Further, the light condensing device comprises a plurality of halogen tungsten lamps, the halogen tungsten lamps are respectively arranged at the top of the warming bin through corresponding cup lamp seats, the top of the warming bin is provided with light transmitting areas corresponding to the halogen tungsten lamps one by one, the halogen tungsten lamps are close to or attached to the light transmitting areas, the light emitting direction of the halogen tungsten lamps penetrates through the light transmitting areas and faces the reaction tank, and the halogen tungsten lamps are respectively electrically connected with the terminal host.
Furthermore, the top of the warming bin is a conical top, and the plurality of halogen tungsten lamps are respectively arranged on the top inclined plane of the warming bin at intervals in a surrounding manner.
Furthermore, the supporting piece is a vertical rod-shaped member, the lower end of the supporting piece is supported on the weighing surface of the electronic weighing device through a supporting seat, the upper end of the supporting piece is provided with a groove matched with the reaction tank, and the reaction tank is placed in the groove at the upper end of the supporting piece.
Further, the temperature detector is a thermocouple, the support member is hollow, the thermocouple is arranged in the hollow cavity in the support member, and the upper end of the thermocouple is a detection end and is in contact with the bottom wall of the reaction tank.
The thermogravimetric analysis method based on the light-gathering heating comprises the following steps:
step 1: placing a sample, performing data connection, and setting an initial temperature and a temperature rise program on a terminal host;
step 2: adjusting the luminous intensity of the light condensing device according to the collected real-time temperature information and the target temperature rise process;
and step 3: after heating is finished, taking out the sample after cooling, and deriving temperature and weight information;
and 4, step 4: drawing a Thermogravimetric (TG) curve based on the temperature and weight information of the sample
The beneficial effects are that: 1) temperature regulation and control of a local wide temperature range and a wide temperature rise rate can be realized in a light-gathering heating mode, real-time regulation and control of temperature can be realized, accurate control of the whole heating process is met, and multiple sections of temperature rise programs can be set to meet the requirements of various temperature rise processes; 2) obtaining a real-time reaction image of the material at high temperature; meanwhile, the balance and the thermocouple are coupled in a transmission mode, so that the synchronous transmission of temperature and weight information is met, and the problem of data information loss at high temperature and high heating rate is solved; 3) based on the high temperature rise rate provided by the condensing heating, the thermogravimetric analysis method capable of being used for the high temperature rise rate is realized by utilizing the synchronous temperature and weight information, and the problem that the conventional thermogravimetric analyzer can only be used for the slow temperature rise reaction is solved.
Drawings
Fig. 1 is a schematic structural diagram of a rapid heating system based on condensing heating according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a reaction tank; 2. a support member; 3. an electronic weigher; 4. a temperature raising bin; 5. a light condensing device; 6. a temperature detector; 7. an interference prevention cover; 8. a camera device; 21. a supporting seat; 41. an air inlet; 42. an air outlet; 43. heating the shell; 44. a sealing cover; 45. a second sealing gasket; 51. a halogen tungsten lamp; 52. a cup lamp holder; 71. a first flange; 72. a first sealing gasket; 431. a second flange; 432. a third flange; 441. and a fourth flange.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the rapid warming system based on condensing heating of the present embodiment includes a reaction tank 1, a support 2, an electronic weigher 3, a warming bin 4, a condensing device 5, a temperature detector 6 and a terminal host, wherein the warming bin 4 is disposed above the electronic weigher 3, an air inlet 41 and an air outlet 42 are arranged on the support part 2, the support part is supported on the weighing surface of the electronic weighing device 3, the upper part of the reaction tank extends into the heating chamber 4, the reaction tank 1 is arranged in the heating chamber 4, and is mounted on the upper portion of the above-mentioned supporting component 2, the above-mentioned light-gathering device 5 is mounted on the wall of the above-mentioned heating chamber 4, the light emitted therefrom is converged and directed toward the reaction cell 1, the detection end of the temperature detector 6 is brought into contact with the reaction cell 1, the terminal host is respectively and electrically connected with the electronic weigher 3, the light gathering device 5 and the temperature detector 6.
In the embodiment, the temperature-rising bin 4 and the reaction tank 1 are used for providing a high-temperature and high-temperature-rising-rate reaction site for materials, and mainly aim at solid raw materials; the light gathering device 5 is used for providing a high-temperature light source required by the raw materials in the reaction tank 1 and focusing light rays to the area where the materials are located; in the process, the electronic weigher 3 and the temperature detector 6 feed back temperature change information and weight information to the terminal host to provide an information basis for adjusting the temperature rise process, then the terminal host adjusts the illumination parameters of the light gathering device 5 according to the fed back information, more specifically, solid powder raw materials are uniformly laid on the reaction tank 1, the atmosphere required by the reaction is introduced into the temperature rise bin 4 for a period of time, and residual air in the temperature rise bin 4 is removed. And starting the terminal host, setting the required initial temperature and a multi-stage temperature rise program, starting, and automatically adjusting the output voltage and current of the light condensing device 5 by the host to reach the set real-time reaction temperature. If the liquid and gas products need to be analyzed, the washing liquid bottle and the gas bag are connected to the gas outlet 42 to collect the liquid and gas products generated in the experimental process respectively. After the operation is finished, closing the light gathering device 5, taking out a reaction solid product after the whole device is cooled, cleaning the inside of the device, and finishing the experiment;
and when thermogravimetric analysis is carried out, the temperature and weight information recorded by the program is exported from the host computer to the image drawing software, and a Thermogravimetric (TG) curve is drawn according to the synchronous change information of the temperature and the weight.
It should be noted that: the program for realizing synchronous transmission and voltage control in the terminal host can be developed based on Labview or Matlab and other software, which belongs to the prior art and is not described herein any more.
It should be added that: in the experimental process, the air inlet in the air inlet 41 can select oxygen, nitrogen and the like according to different heating requirements of combustion, pyrolysis and the like, and the air flow in the air inlet 41 is slightly larger than the air outlet in the air outlet 42 so as to ensure the micro-positive pressure of the device to prevent air from leaking in; the reaction tank 1 is made of black zirconia ceramics, can resist the high temperature of 2000 ℃ and efficiently absorbs radiation.
In a preferred embodiment, the system further comprises an image pickup device 8, a transparent shooting area is provided at a position corresponding to the reaction cell 1 on the top of the temperature rising bin 4, the image pickup device 8 is mounted at the shooting area on the top of the temperature rising bin 4 and is used for monitoring the picture information of the reaction cell 1 through the shooting area, and the image pickup device 8 is electrically connected to the terminal host.
In the scheme, a camera device 8 (a micro-focus camera) is adopted to shoot a reaction process in real time, so that a real-time reaction image of the material at high temperature can be obtained; meanwhile, the data transmission coupling of the electronic weighing device 3 and the temperature detector 6 meets the requirement of synchronous transmission of temperature and weight information, and makes up the problem of data information loss at high temperature and high heating rate.
What needs to be supplemented is: camera device 8 passes through rack-mount in 4 tops in the storehouse that heaies up, sets up the louvre in the frame (correspond camera device 8 top, b refers in the picture), and the louvre top can install little fan refrigeration piece additional and further strengthen the heat dissipation, and is aided with the inlet port of evenly arranging to realize under the high temperature material reaction observation of more closely.
In a preferred embodiment, the electronic weighing device further comprises an anti-interference cover 7, the anti-interference cover 7 is arranged outside the electronic weighing device 3, the upper part of the support 2 penetrates through a hole matched with the upper end of the anti-interference cover 7, and the warming bin 4 is assembled at the upper end of the anti-interference cover 7.
In this embodiment, the design of the interference prevention cover 7 can avoid the interference of foreign matters and air flow on the weighing of the electronic weigher 3, so that the experimental data are more accurate.
In this embodiment, the warming bin 4 includes a warming casing 43 and a sealing cover 44, the warming casing 43 has an open upper end and a lower end, and the lower end is hermetically connected to the upper end of the interference preventing cover 7, the sealing cover 44 has a casing structure with an open lower end, and the lower end is hermetically connected to the upper end of the warming casing 43, the side wall of the warming casing 43 is provided with the air outlet 42, the upper portion of the sealing cover 44 is provided with the air inlet 41, and the light collecting device 5 is mounted on the sealing cover 44.
In this scheme, intensification storehouse 4 adopts split type structural design, convenient dismouting and combination fast do benefit to going on smoothly and fast of experiment.
In the above embodiment, the seal cover 44 is made of an aluminum alloy material.
More specifically, an annular first flange 71 is provided at the upper end of the interference prevention cover 7, an annular second flange 431 is provided at the lower end of the warming housing 43, the second flange 431 is provided at the upper end of the first flange 71, and a first sealing gasket 72 is interposed therebetween; an annular third flange 432 is provided at the upper end of the temperature rise housing 43, an annular fourth flange 441 is provided at the lower end of the sealing cover 44, the fourth flange 441 is provided at the upper end of the third flange 432, and a second sealing gasket 45 is interposed therebetween.
In the scheme, the heating shell 43 is placed on the anti-interference cover 7 and is butted through the flange, a sealing washer is adopted for sealing, the two are combined conveniently, the sealing performance is better, the sealing cover 44 is also in butt joint with the heating shell 43 in a butt joint combination mode, and the whole heating bin 4 is very convenient and rapid to assemble and disassemble.
In a preferred embodiment, the light condensing device 5 includes a plurality of tungsten halogen lamps 51, the plurality of tungsten halogen lamps 51 are respectively mounted on the top of the temperature rising chamber 4 through corresponding cup holders 52, the top of the temperature rising chamber 4 is provided with light transmitting regions (denoted by c in the figure) corresponding to the tungsten halogen lamps 51 one by one, the tungsten halogen lamps 51 are close to or attached to the light transmitting regions, the light emitting direction thereof passes through the light transmitting regions and faces the reaction tank 1, and the tungsten halogen lamps 51 are respectively electrically connected to the terminal main unit.
In this embodiment, the plurality of tungsten halogen lamps 51 are uniformly distributed on the top of the cup lamp holder 52 and the warming bin 4 and are focused to realize the high temperature in the area near the reaction tank 1, the limit temperature of the three tungsten halogen lamps 51 can reach 1200 ℃, the light-transmitting area adopts quartz glass, the size of the lamp surface of the tungsten halogen lamp 51 is the same, the high-temperature light source can be resisted, the light transmission is not influenced, and the light passing direction is fixed.
Preferably, the top of the warming bin 4 is a conical top, and the plurality of halogen tungsten lamps 51 are respectively disposed on the top slope of the warming bin 4 at intervals.
In the scheme, the heating chamber 4 is designed by adopting the top of a polygonal pyramid, the halogen tungsten lamps 51 are distributed on a plurality of conical surfaces at intervals, the respective illumination is gathered (condensed) towards the reaction tank 1 at the middle part below, the distribution is reasonable, and the high temperature of the area near the reaction tank 1 can be realized.
In this embodiment, the air inlet holes 41 are a plurality of long pipe holes arranged at the top of the warming bin 4 near the conical top, the air inlet holes 41 are distributed at intervals in a surrounding manner and are horizontally divergent towards the periphery, and the air inlet holes 41 are uniformly arranged at the top of the warming bin 4, so that the flow field of the reaction area inside the warming bin 4 is uniform.
What needs to be supplemented is: when the camera device 8 is installed on the top of the warming bin 4, the camera device 8 can be further protected while the shooting area of the camera device 8 is cooled by the aid of the plurality of uniformly-divergent air inlets 41 formed in the top of the warming bin 4.
In the above embodiment, the upper end of the cup holder 52 is provided with a heat sink (denoted by a in the figure), which is beneficial to the good heat dissipation of the tungsten halogen lamp 51 and ensures the good operation thereof.
In a preferred embodiment, the support 2 is a vertical rod-shaped member, the lower end of the vertical rod-shaped member is supported on the weighing surface of the electronic weighing device 3 through a support base 21, the upper end of the vertical rod-shaped member is provided with a groove matched with the reaction cell 1, and the reaction cell 1 is placed in the groove at the upper end of the support 2.
In this embodiment, support piece 2 structural design is simple, and with the cooperation between the storehouse 4 that heaies up compact, support piece 2 wholly adopts quartz material, and the cost is cheap when enduring high temperature. The bottom surface of the support base 21 is provided with a rubber cushion to prevent sliding.
In a preferred embodiment, the temperature detector 6 is a thermocouple, the support member 2 is hollow, and the thermocouple is disposed in the hollow cavity inside the support member 2, has a detection end at an upper end thereof, and contacts with the bottom wall of the reaction cell 1.
In this embodiment, the thermocouple is a K-type thermocouple, which can satisfy temperature measurement in the range of 20 to 1300 ℃, and the thermocouple is in contact with the bottom end of the reaction cell 1 to accurately measure the temperature of the reactant during the reaction.
In this embodiment, the electronic weighing device 3 is a high-precision electronic balance with a precision of 0.1mg, fixed on a bearing table, and connected to a support.
Example 2
The thermogravimetric analysis method based on the condensing heating in the embodiment is implemented by using the rapid temperature rise system based on the condensing heating in the embodiment 1, and comprises the following steps:
step 1: placing a sample, performing data connection, and setting an initial temperature and a temperature rise program on a terminal host;
step 2: adjusting the luminous intensity of the light condensing device according to the collected real-time temperature information and the target temperature rise process;
and step 3: after heating is finished, taking out the sample after cooling, and deriving temperature and weight information;
and 4, step 4: a Thermogravimetric (TG) curve was plotted based on the sample temperature and weight information.
Further, in step 2, a target real-time temperature is calculated according to an initial temperature and a temperature rise program preset on the terminal host, so as to realize the temperature control of the whole process.
More specifically, in step 2, if the temperature measured by the temperature detector 6 is different from the required real-time temperature, the voltage/current output by the voltage/current source of the light condensing device 5 (halogen tungsten lamp 51) is controlled by feedback adjustment until the difference between the measured temperature and the set temperature is within the allowable range; when the difference between the measured temperature and the set temperature is too large, the output of the voltage/current source is set to be 0 so as to protect the safety of the device.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
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; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
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 and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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 (10)
1. The utility model provides a rapid heating system based on spotlight heating which characterized in that: the device comprises a reaction tank (1), a support member (2), an electronic weighing device (3), a warming bin (4), a light condensing device (5), a temperature detector (6) and a terminal host, wherein the warming bin (4) is arranged above the electronic weighing device (3) and is provided with an air inlet (41) and an air outlet (42), the support member (2) is supported on a weighing surface of the electronic weighing device (3), the upper part of the support member extends into the warming bin (4), the reaction tank (1) is arranged in the warming bin (4) and is arranged on the upper part of the support member (2), the light condensing device (5) is arranged on a bin wall of the warming bin (4), light emitted by the light condensing device is focused towards the reaction tank (1), a detection end of the temperature detector (6) is contacted with the reaction tank (1), and the terminal host is respectively contacted with the electronic weighing device (3), The light-gathering device (5) is electrically connected with the temperature detector (6).
2. The rapid heating system based on the spot heating as claimed in claim 1, wherein: still include camera device (8), the top of intensification storehouse (4) corresponds the position of reaction tank (1) is equipped with transparent shooting district, camera device (8) assemble in the shooting district department at intensification storehouse (4) top is used for seeing through it takes the prison photograph in the district the picture information of reaction tank (1), camera device (8) with the terminal host computer electricity is connected.
3. The rapid heating system based on the spot heating as claimed in claim 1, wherein: still include jam-proof cover (7), jam-proof cover (7) cover is located outside electronic weighing device (3), the upper portion of support piece (2) passes the hole site of jam-proof cover (7) upper end adaptation, heat-up storehouse (4) assemble in the upper end of jam-proof cover (7).
4. The rapid heating system based on the spot heating as claimed in claim 3, wherein: the heating bin (4) comprises a heating shell (43) and a sealing cover (44), the upper end and the lower end of the heating shell (43) are open, the lower end of the heating shell (43) is connected with the upper end of the anti-interference cover (7) in a sealing mode, the sealing cover (44) is of a shell structure with the lower end open, the lower end of the sealing cover is connected with the upper end of the heating shell (43) in a sealing mode, the side wall of the heating shell (43) is provided with the air outlet hole (42), the upper portion of the sealing cover (44) is provided with the air inlet hole (41), and the light gathering device (5) is assembled on the sealing cover (44).
5. The rapid heating system based on the spot heating as claimed in claim 4, wherein: an annular first flange (71) is arranged at the upper end of the interference preventing cover (7), an annular second flange (431) is arranged at the lower end of the warming shell (43), the second flange (431) is arranged at the upper end of the first flange (71), and a first sealing gasket (72) is clamped between the first flange and the second flange; the upper end of the warming shell (43) is provided with an annular third flange (432), the lower end of the sealing cover (44) is provided with an annular fourth flange (441), the fourth flange (441) is arranged at the upper end of the third flange (432), and a second sealing gasket (45) is clamped between the fourth flange (441) and the third flange.
6. The rapid heating system based on the spot heating as claimed in claim 1, wherein: the light condensing device (5) comprises a plurality of halogen tungsten lamps (51), the halogen tungsten lamps (51) are arranged at the top of the heating chamber (4) through corresponding cup lamp holders (52), light transmitting areas corresponding to the halogen tungsten lamps (51) one to one are arranged at the top of the heating chamber (4), the halogen tungsten lamps (51) are close to or attached to the light transmitting areas, the light emitting directions of the halogen tungsten lamps penetrate through the light transmitting areas and face the reaction tank (1), and the halogen tungsten lamps (51) are electrically connected with the terminal host respectively.
7. The rapid heating system based on the spot heating as claimed in claim 6, wherein: the top of the warming bin (4) is a conical top, and the halogen tungsten lamps (51) are respectively arranged on the top inclined plane of the warming bin (4) in a surrounding mode at intervals.
8. A rapid warming system based on spot heating according to any one of claims 1 to 7, wherein: the supporting piece (2) is a vertical rod-shaped member, the lower end of the supporting piece is supported on a weighing surface of the electronic weighing device (3) through a supporting seat (21), the upper end of the supporting piece is provided with a groove matched with the reaction tank (1), and the reaction tank (1) is placed in the groove at the upper end of the supporting piece (2).
9. The rapid heating system based on condensing heating according to claim 8, wherein: the temperature detector (6) is a thermocouple, the supporting piece (2) is hollow, the thermocouple is arranged in the hollow cavity in the supporting piece (2), the upper end of the thermocouple is a detection end and is in contact with the bottom wall of the reaction tank (1).
10. A thermogravimetric analysis method based on concentrated heating, implemented by using the rapid temperature rise system based on concentrated heating according to any one of claims 1 to 9, characterized by comprising the following steps:
step 1: placing a sample, performing data connection, and setting an initial temperature and a temperature rise program on a terminal host;
step 2: adjusting the luminous intensity of the light condensing device according to the collected real-time temperature information and the target temperature rise process;
and step 3: after heating is finished, taking out the sample after cooling, and deriving temperature and weight information;
and 4, step 4: a Thermogravimetric (TG) curve was plotted based on the sample temperature and weight information.
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| CN202111127686.7A CN113867445B (en) | 2021-09-26 | 2021-09-26 | Rapid heating system based on light-gathering heating and thermogravimetric analysis method |
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| CN202111127686.7A CN113867445B (en) | 2021-09-26 | 2021-09-26 | Rapid heating system based on light-gathering heating and thermogravimetric analysis method |
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| CN113867445B CN113867445B (en) | 2022-11-15 |
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