CN219415694U - Fluidized bed tube furnace system for producing two-dimensional material by gas phase method - Google Patents
Fluidized bed tube furnace system for producing two-dimensional material by gas phase method Download PDFInfo
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- CN219415694U CN219415694U CN202320237383.9U CN202320237383U CN219415694U CN 219415694 U CN219415694 U CN 219415694U CN 202320237383 U CN202320237383 U CN 202320237383U CN 219415694 U CN219415694 U CN 219415694U
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Abstract
The utility model discloses a fluidized bed tube furnace system for producing two-dimensional materials by a gas phase method, which comprises the following steps: the first heating system comprises a first heating furnace tube and a first heating temperature zone, the first heating furnace tube is positioned in the first heating temperature zone, and the first heating furnace tube is provided with an air inlet for introducing inert gas and/or reactive gas; the fluidization reaction system comprises a fluidization reaction hot temperature zone and a fluidization reaction furnace tube, and the fluidization reaction furnace tube is positioned in the fluidization reaction hot temperature zone; an intermediate collection system comprising an intermediate collection tank provided with an intermediate collection port and an air outlet port; the first heating furnace tube is directly or indirectly communicated with the fluidization reaction furnace tube; and the fluidized reaction furnace tube is directly or indirectly communicated with the intermediate collecting tank. The fluidized bed tube furnace system can realize the large-scale preparation of two-dimensional materials.
Description
Technical Field
The utility model belongs to the field of new materials, and particularly relates to a fluidized bed tube furnace system for producing two-dimensional materials by a gas phase method.
Background
At present, the equipment for preparing the two-dimensional material is mainly a tube furnace, the furnace tube of the tube furnace is generally horizontally and transversely arranged, and the preparation flow is as follows: placing a precursor material in a hearth of a tube furnace, introducing inert gas to heat the precursor material, and introducing reactive gas to react after the reaction temperature is reached to prepare a two-dimensional material; or placing the precursor material in a first reaction zone, placing a specific substrate material such as silicon wafer, sapphire, mica or metal in a first or second reaction zone, introducing inert gas or reactive gas, and growing a two-dimensional material on the substrate material. And after the reaction is finished, stopping heating by the tube furnace, and taking out the two-dimensional material or the substrate growing with the two-dimensional material to finish the whole preparation flow of the two-dimensional material.
However, the preparation of two-dimensional materials using a tube furnace has the following problems: firstly, preparing a two-dimensional material in a large scale by adopting a tube furnace, wherein a large amount of precursor materials can be accumulated in a hearth of the tube furnace, so that the precursor materials are insufficiently contacted with reactive gas, and complete reaction is difficult to perform; when a specific substrate material is adopted to grow a two-dimensional material, the dosage of a precursor material needs to be controlled finely, the preparation is difficult to be carried out in the same proportion in an amplifying way, and the yield of the prepared two-dimensional material is extremely low, so that the preparation of the two-dimensional material by adopting a tube furnace is limited to the research and development level, and the large-scale preparation is difficult to be carried out; secondly, a large amount of intermediates are generated when the reactive gas reacts with the raw material precursor to prepare the two-dimensional material, the intermediates are condensed at the tail end of the tube furnace, the tube furnace is blocked, explosion safety hidden danger is brought, the intermediates are condensed at the tube wall of the tube furnace, effective collection is difficult, and the two-dimensional material is easy to mix with the prepared two-dimensional material during sampling, so that the two-dimensional material contains a large amount of impurities; and the intermediate may have strong volatility, water absorption and high reactivity, and is difficult to collect effectively; thirdly, a tubular furnace is adopted to prepare the two-dimensional material through the reaction of a large amount of precursor materials and active gases, stacking is easy to occur at high temperature, and the prepared two-dimensional material is required to be subjected to a stripping process subsequently, so that the process complexity and the preparation cost are increased.
Disclosure of Invention
In view of the above, it is necessary to provide a fluidized bed tube furnace system that can produce a two-dimensional material having a high purity on a large scale, has a high safety factor, and can efficiently collect intermediates generated in the production process of the two-dimensional material.
The utility model provides a fluidized bed tube furnace system for producing two-dimensional materials by a gas phase method, which comprises the following components:
the first heating system comprises a first heating furnace tube and a first heating temperature zone, the first heating furnace tube is positioned in the first heating temperature zone, and the first heating furnace tube is provided with an air inlet for introducing inert gas and/or reactive gas;
the fluidized reaction system comprises a fluidized reaction hot temperature zone and a fluidized reaction furnace tube, wherein the fluidized reaction furnace tube is positioned in the fluidized reaction hot temperature zone;
an intermediate collection system comprising an intermediate collection tank provided with an intermediate collection port and an air outlet port;
the first heating furnace tube is directly or indirectly communicated with the fluidization reaction furnace tube; and
the fluidized reaction furnace tube is directly or indirectly communicated with the intermediate collecting tank.
In some embodiments, a filter screen and/or a dust collector are arranged in the fluidized reaction furnace tube.
In some embodiments, the screen is positioned at the bottom of the fluidized reaction furnace and the dust collector is positioned at the top of the fluidized reaction furnace.
In some embodiments, the fluidized reaction furnace tube is in an drift diameter structure or a special-shaped structure.
In some embodiments, the special-shaped structure has a first section and a second section, the second section is located above the first section, the second section has a diameter larger than that of the first section, the filter screen is located in the first section, and the dust remover is located in the second section.
In some embodiments, the first heating furnace tube comprises a profiled curved furnace tube.
In some embodiments, the intermediate collecting tank has a double-layer structure, and circulating cooling water or other cooling medium can be introduced between the layers.
In some embodiments, the above-described intermediate collection system further comprises a cooling device for cooling the gas introduced into the intermediate collection tank.
In some embodiments, the first heating furnace tube includes two or more heating furnace tubes, and the first heating temperature zone includes two or more heating temperature zones corresponding to the two or more heating furnace tubes.
In some embodiments, the fluidized reaction furnace tube is further provided with a powder material, and the powder material is positioned between the filter screen and the dust remover; and/or the powder material is arranged on the surface of the filter screen.
In some embodiments, the fluidized bed tube furnace system further comprises: and the second heating system comprises a connecting heating furnace tube and a connecting heating temperature zone, the second heating system is arranged between the fluidization reaction system and the intermediate collecting system, and the connecting heating furnace tube is communicated with the fluidization reaction furnace tube and the intermediate collecting tank.
In some embodiments, the fluidized bed tube furnace system further comprises: and the heat exchange device is used for realizing heat exchange between the intermediate gas which is introduced into the intermediate collecting system by the fluidized reaction system and the raw material gas which is introduced into the first heating system.
In some embodiments, the heat exchange device is disposed on an outer wall of the intermediate collection tank.
Compared with the prior art, the fluidized bed tube furnace system for producing the two-dimensional material by the gas phase method has the following advantages: the fluidized bed tube furnace system adopts the vertically arranged fluidized bed furnace tubes, inert gas and/or reactive gas is introduced from the bottom, so that gas-solid full contact is realized, a large amount of precursor materials are prevented from being accumulated in the furnace tubes of the tube furnace, the problem of insufficient reaction is solved, and the large-scale preparation of the two-dimensional materials is realized; secondly, the directional collection of intermediates generated in the preparation process of the two-dimensional material is realized, and the explosion potential safety hazard caused by condensation of the intermediates at the tail part of the traditional tubular furnace is avoided, so that the prepared two-dimensional material has higher purity; thirdly, the process is simple and the cost is low.
Drawings
FIG. 1 is a schematic view showing the structure of a tube furnace system for a fluidized bed in example 1 of the present utility model.
FIG. 2 is a schematic view showing the structure of a tube furnace system for a fluidized bed in example 2 of the present utility model.
FIG. 3 is a schematic view showing the structure of a tube furnace system for fluidized bed in example 3 of the present utility model.
FIG. 4 is a schematic view showing the structure of a fluidized bed tube furnace system in example 4 of the present utility model.
FIG. 5 is a schematic view showing the structure of a fluidized bed tube furnace system in example 5 of the present utility model.
The main reference numerals illustrate:
a first heating system; a first heating temperature zone 11, a first heating furnace tube 12 and an air inlet 13; 14 second heating temperature zone, 15 second heating furnace tube and 16 air inlet;
20 a fluidized reaction system; 21 a fluidized reaction hot temperature zone; 22 fluidization reaction furnace tube; a 23 filter screen; a 24 dust remover; 25 powder materials;
30 an intermediate collection system; 31 an intermediate collection tank; 32 intermediate collection ports; a 33 outlet; 34 cooling device, 35 heat exchange interlayer, 36 air inlet;
40 a second heating system, 41 is connected with the heating temperature zone, 42 is connected with the heating furnace tube;
50 heat exchange device, 51 outer tube, 52 inner tube, 53 air inlet;
90. 91, 92, 93, 94, 95, 96, 97, 98, 99 connecting lines;
100 A 200, 300, 400, 500 fluidized bed tube furnace system.
Detailed Description
The technical scheme of the utility model is described below through specific examples. It is to be understood that the reference to one or more steps of the utility model does not exclude the presence of other methods and steps before or after the combination of steps, or that other methods and steps may be interposed between the explicitly mentioned steps. It should also be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Unless otherwise indicated, the numbering of the method steps is for the purpose of identifying the method steps only and is not intended to limit the order of arrangement of the method steps or to limit the scope of the utility model, which relative changes or modifications may be regarded as the scope of the utility model which may be practiced without substantial technical content modification.
The raw materials and instruments used in the examples are not particularly limited in their sources, and may be purchased on the market or prepared according to conventional methods well known to those skilled in the art.
The fluidized bed tube furnace system for producing two-dimensional materials by the gas phase method provided by the utility model is further described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, embodiment 1 of the present utility model provides a fluidized bed tube furnace system 100 for producing a two-dimensional material by a gas phase method, the fluidized bed tube furnace system 100 comprising: a first heating system 10, a fluidized reaction system 20, and an intermediate collection system 30. The first heating system 10 includes: a first heating temperature zone 11 and a first heating furnace tube 12, the first heating furnace tube 12 being located within the first heating temperature zone 11, the first heating furnace tube 12 being provided with an inlet 13, the inlet 13 being for introducing inert gas and/or reactive gas (defined as raw material gas); the fluidization reaction system 20 comprises a fluidization reaction hot temperature zone 21, a fluidization reaction furnace tube 22, a filter screen 23 and a dust remover 24, wherein the filter screen 23 and the dust remover 24 are positioned in the fluidization reaction furnace tube 22 and are arranged at two opposite ends of the fluidization reaction furnace tube 22 at intervals; the fluidization reaction furnace tube 22 is positioned in the fluidization reaction hot temperature zone 21, and powder materials 25 (solid-phase reaction raw materials or precursor raw materials) are accommodated in the fluidization reaction furnace tube 22; the intermediate collection system 30 includes: an intermediate collection tank 31, the intermediate collection tank 31 being provided with an intermediate collection port 32 and an air outlet port 33; the first heating furnace tube 12 is communicated with the fluidization reaction furnace tube 22 through a connecting pipeline 91, and raw material gas enters the fluidization reaction furnace tube 22 after being heated by the first heating furnace tube 12; and, the fluidized reaction furnace tube 22 and the intermediate collecting tank 31 are communicated through a connecting pipe 92, the gas introduced from the fluidized reaction furnace tube 22 into the intermediate collecting tank 31 is defined as an intermediate gas, and the intermediate gas includes an inert gas, a residual reactive gas, and a reaction intermediate gas; the reaction intermediate gas is a gas generated after the reaction of the reactive gas with the powder material 25.
In the fluidized-bed tube furnace system 100 of the present utility model, the fluidized-bed reaction furnace tube 22 is a gas-solid reaction vessel, and the fluidized-bed reaction heat zone 21 provides the fluidized-bed reaction furnace tube 22 with heat required for the reaction to a reaction temperature, and generally, the fluidized-bed reaction furnace tube 22 is heated to a reaction temperature of 600 ℃ to 1800 ℃. The fluidized reaction furnace tube 22 can adopt an drift diameter structure or a special-shaped structure, and the optional materials are quartz, corundum, graphite, silicon carbide, boron nitride or metal, etc. The tube diameter of the fluidized reaction furnace tube 22 needs to be determined by comprehensively considering the density of the powder material 25 and the flow rate of the gas. In this embodiment, the fluidized reaction furnace tube 22 is a special-shaped structure having a first section and a second section, the diameter of the second section is larger than that of the first section, the filter screen 23 is located in the first section, and the dust remover 24 is located in the second section. More specifically, the second section is positioned above the first section such that the screen 23 is positioned at the bottom of the fluidized reaction furnace tubes 22 and the dust collector 24 is positioned at the top of the fluidized reaction furnace tubes 22. The filter screen 23 (which may also be a filter sheet in some embodiments) has good air permeability, and is fixed to the bottom of the fluidized reaction furnace tube 22, and is used for containing the powder material 25, so as to prevent the powder material 25 from passing through and leaving the reaction zone. The dust remover 24 has good air permeability, is fixed on the top of the fluidization reaction furnace tube 22, is used for blocking two-dimensional materials generated by the reaction, prevents products from overflowing along with the air flow to the outside of the reaction zone, and the filter screen 23 and the dust remover 24 are made of ceramic materials, and in some embodiments, the dust remover 24 can also be a filter screen or a filter sheet.
The fluidized reaction furnace tube 22 is further provided with a powder material 25, and the powder material 25 is located between the filter screen 23 and the dust remover 24, specifically, the powder material 25 is disposed on the surface of the filter screen 23. The particle size and packing of the powder material 25 needs to be considered in combination with its density, tube furnace diameter and gas flow.
The first heating system 10 is used for preheating the raw material gas introduced into the fluidized reaction system 20, so that the temperature of the raw material gas introduced into the fluidized reaction furnace tube 22 is close to the temperature of the powder material 25 in the fluidized reaction furnace tube 22, and the problems of low reaction efficiency, condensation of intermediate products and the like caused by the temperature difference between the gas phase and the solid phase are avoided. The material of the first heating furnace tube 12 may be quartz, corundum, graphite, silicon carbide, boron nitride, metal, or the like. In the present embodiment, in order to improve the heat transfer efficiency, the first heating furnace tube 12 is a multi-bent shaped special-shaped bent furnace tube, and the material of the special-shaped bent furnace tube is preferably a metal with excellent molding processability. The gas flow rate of the gas introduced through the gas inlet 13 is 0.01L/min to 1000L/min.
The effluent gas from the fluidized reaction furnace tubes 22 is collected by an intermediate collection system 30. In the present embodiment, a cooling means for cooling the gas therein is further provided at the outer wall of the intermediate collecting tank 31; more specifically, the outer wall of the intermediate collecting tank 31 is provided with a circulating water cooling device, and the gas-phase intermediate is collected by separating the gas after condensing on the inner wall of the intermediate collecting tank 31. The gas outlet 33 is used for discharging inert gas and/or residual reaction gas for subsequent tail gas treatment. The intermediate collecting port 32 is used for collecting the intermediate produced by condensation in the gas after the reaction. In a specific embodiment, the intermediate collection port 32 is located at the bottom of the intermediate collection tank 31 and the air outlet port 33 is located at the side of the intermediate collection tank 31.
Example 2
Referring to fig. 2, embodiment 2 of the present utility model provides a fluidized bed tubular furnace system 200 for producing two-dimensional materials by a gas phase method, which is the same as the fluidized reaction system 20 and the intermediate collecting system 30 in the fluidized bed tubular furnace system 100 provided in embodiment 1, wherein the first heating system 10 comprises two heating temperature zones, namely a first heating temperature zone 11 and a second heating temperature zone 14, respectively, the first heating furnace tube 12 is located in the first heating temperature zone 11, the second heating furnace tube 15 is located in the second heating temperature zone 14, the first heating furnace tube 12 and the second heating furnace tube 15 are communicated through a connecting furnace tube 93, and the second heating furnace tube 15 is provided with an air inlet 16 for introducing inert gas and/or reactive gas. The gas is preheated to a certain temperature by the second heating furnace tube 15, then enters the first heating furnace tube 12 for further heating to a required temperature, and then is introduced into the fluidization reaction furnace tube 22 to participate in gas-solid reaction.
The fluidized reaction furnace tube 22 serves as a gas-solid reaction vessel, and when the powder material 25 is in a flowing state, the gas-solid is sufficiently contacted to ensure high reaction efficiency and reaction uniformity. When the powder material 25 in the fluidized reaction furnace tube 22 is filled in a large amount (more than 50 Kg), a high raw material gas inlet flow rate (300L/min to 1000L/min) is needed to ensure that the powder material 25 is in a flowing state, when the flow rate of the raw material gas is high, the phenomenon of reducing the temperature of the gas generated by a pipeline is obvious, the problem of unstable temperature of the raw material gas is caused, and the quality stability of the product is influenced, and the first heating system 10 is provided with a plurality of sections of heating areas so as to ensure that the raw material gas introduced into the fluidized reaction furnace tube 22 has stable gas temperature and high gas inlet flow rate.
In the present embodiment, the first heating system 10 is set to a two-stage heating temperature zone, the heating zone of the second heating temperature zone 14 is set to room temperature to 600 ℃, and the heating zone of the first heating temperature zone is set to room temperature to 1800 ℃, more preferably, is set to room temperature to 1500 ℃. The second heating furnace tube 15 into which the raw material gas is introduced first is configured as a straight furnace tube, and the first heating furnace tube 12 is configured as a shaped curved furnace tube. In a specific embodiment, the flow rate of the raw material gas introduced through the gas inlet 16 is 600L/min, and the raw material gas is heated to 600 ℃ through the second heating furnace tube 15, and then enters the first heating furnace tube 12 to be heated to 1000 ℃ required by the reaction.
Similarly, in other embodiments, the first heating system 10 may be configured with multiple heating zones, such as three, four, five, etc., depending on the actual process adjustments, which are within the contemplation of the present utility model.
Example 3
Referring to fig. 3, embodiment 3 of the present utility model provides a fluidized bed tube furnace system 300 for producing a two-dimensional material by a gas phase process, which is identical to the first heating system 10, the fluidized reaction system 20, and the intermediate collecting system 30 in the fluidized bed tube furnace system 200 provided in embodiment 2; the difference is that a second heating system 40 is provided between the fluidized reaction system 20 and the intermediate collecting system 30, the second heating system 40 comprising a junction heating temperature zone 41 and a junction heating furnace tube 42, the junction heating furnace tube 42 being located within the junction heating temperature zone 41. The fluidized reaction furnace tubes 22 are in communication with the connecting heating furnace tubes 42 through connecting furnace tubes 94, and the connecting heating furnace tubes 42 are in communication with the intermediate collection tank 31 through connecting furnace tubes 95. In some embodiments, the heating temperature of the connection heating temperature zone 41 is room temperature to 600 ℃, which can be adjusted according to the chemical nature of the reaction intermediate.
When mass production is performed, the flow rate of intermediate gases, including inert gases, residual reactive gases, and reaction intermediate gases, introduced from the fluidized reaction furnace tube 22 to the intermediate collection system 30 is increased; in order to avoid condensation and blockage of the pipeline in the pipeline and at the positions of the connecting ports of the pipeline when the content of the reaction intermediate product gas is high, a second heating system 40 is arranged between the fluidization reaction system 20 and the intermediate collecting system 30 so as to keep the reaction intermediate product gas in a gas phase in the pipeline and collect the reaction intermediate product gas in the intermediate collecting system 30.
Example 4
Referring to fig. 4, embodiment 4 of the present utility model provides a fluidized bed tube furnace system 400 for producing a two-dimensional material by a gas phase process, which is identical to the first heating system 10, the fluidized reaction system 20, and the intermediate collecting system 30 in the fluidized bed tube furnace system 100 provided in embodiment 1; the difference is that the heat exchange device 50 is further included to exchange heat between the intermediate gas introduced into the intermediate collecting system 30 from the fluidized reaction system 20 and the raw material gas introduced into the first heating system 10, so as to heat the raw material gas by using the heat of the intermediate gas, and improve the heat utilization rate of the whole system.
In this embodiment, the heat exchange device 50 is a double-layer pipe with a nested structure, and includes an outer pipe 51 and an inner pipe 52, the outer pipe 51 is provided with an air inlet 53 for introducing raw material gas, and the air outlet of the outer pipe 51 is communicated with the air inlet of the first heating furnace tube 12 through a connecting pipeline 96, so that the raw material gas exchanges heat with intermediate gas in the inner pipe 52 when passing through the outer pipe 51, and then is introduced into the first heating furnace tube 12; the inner tube 52 is communicated with the fluidized reaction furnace tube 22 through a connecting pipeline 97, so that the intermediate gas discharged from the fluidized reaction furnace tube 22 passes through the inner tube 52, exchanges heat with the raw material gas in the outer tube 51, and then enters the intermediate collecting system 30 for collection.
The gas types of the outer tube 51 and the inner tube 52 of the double tube described above may also be interchanged. In another embodiment, the raw gas is introduced into the inner tube 52, and the intermediate gas in the fluidized reaction furnace tube 22 enters the intermediate collecting system 30 for collection after the heat exchange between the outer tube 51 and the raw gas in the inner tube 52.
In another embodiment, a heating temperature zone (not shown) may be added to the heat exchange device 50 to keep the reaction intermediate in the gas phase in the heat exchange device 50, so as to avoid condensation of the reaction intermediate gas in the intermediate gas and blockage of the pipeline; in a specific embodiment, a heating temperature zone is disposed outside the double-layer pipe.
Of course, the heat exchange device 50 may be other heat exchange structures, and heat exchange devices capable of realizing the heat exchange function between the intermediate gas and the raw material gas according to the present utility model are all within the technical concept of the present utility model.
Example 5
Referring to fig. 5, embodiment 5 of the present utility model provides a fluidized bed tubular furnace system 500 for producing two-dimensional materials by a gas phase method, which is the same as the first heating system 10 and the fluidized reaction system 20 in the fluidized bed tubular furnace system 400 provided in embodiment 4; the difference is that the fluidized bed tube furnace system 500 integrates the heat exchange process of the raw material gas and the intermediate gas into the intermediate collecting system 30, and in this embodiment, a heat exchange interlayer 35 is arranged outside the outer wall of the intermediate collecting tank 31, which is equivalent to a cooling device; the heat exchange interlayer 35 is provided with an air inlet 36 for introducing raw material gas, and the raw material gas enters the first heating furnace tube 12 of the first heating system 10 through the connecting pipeline 90 after exchanging heat with the intermediate gas in the intermediate collecting tank 31 through the heat exchange interlayer 35. Intermediate gas discharged from the fluidized reaction system 20 is introduced into the intermediate collecting tank 31 of the intermediate collecting system 30 through the connecting pipe 99, wherein the reaction intermediate gas encounters condensation at the inner wall of the intermediate collecting tank 31.
In other embodiments, insulation and/or heating means (not shown) may also be provided around the connecting line 99 to avoid condensation of reaction intermediate product gases in the connecting line from clogging the line.
The fluidized bed tube furnace system 500 of the present embodiment integrates a heat exchange device into the intermediate collecting system 30, improves the heat utilization rate of the whole system, and can also reduce the investment of equipment.
Example 6
The embodiment provides a use method for producing a two-dimensional material by adopting a gas phase method of a fluidized bed tube furnace system, which comprises the following steps:
s01: filling powder material 25 into the fluidized reaction furnace tube 22, wherein the powder material 25 is MAX phase material and/or MXene material;
s02: introducing a raw material gas into the first heating furnace tube 12; the raw material gas is inert gas and/or reactive gas, and the reactive gas is: one or more of elemental halogen gas, hydride halogen gas, elemental chalcogen gas, hydride nitrogen, and hydride chalcogen gas; the gas inlet amount of the raw material gas is between 0.01L/min and 1000L/min;
s03: starting a first heating temperature zone 11 of the first heating system 10, wherein the heating temperature of the first heating temperature zone 11 is between room temperature and 1800 ℃;
s04: the fluidization reaction hot temperature zone 21 is opened, and the heating temperature of the fluidization reaction hot temperature zone 21 is room temperature to 1800 ℃.
The sequence of steps S01 to S04 can be adjusted according to the actual operation.
In some embodiments, the method of use further comprises the step of introducing an inert gas and/or evacuating the fluidized bed tube furnace system to remove air from the fluidized bed tube furnace system to avoid oxygen from affecting the reaction at high temperature reaction conditions.
In some embodiments, the feed gas species introduced into the first heating furnace tube 12 are as follows: different kinds of raw material gases are introduced for a plurality of times.
It can be seen that the fluidized bed tube furnace system of the present utility model and method of using the same provides a system of devices. The method can conveniently realize the change of the types of reaction products or the adjustment of functional groups by adjusting the types of gases or the reaction temperature, and can obtain different types of MXene materials or transition metal chalcogenide two-dimensional materials by large-scale production, thereby greatly reducing the production cost of the new materials and promoting and expanding the application of the new materials in the industrial field.
The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.
Claims (12)
1. A fluidized bed tube furnace system for producing two-dimensional materials by a gas phase process, the fluidized bed tube furnace system comprising:
the first heating system comprises a first heating furnace tube and a first heating temperature zone, the first heating furnace tube is positioned in the first heating temperature zone, and the first heating furnace tube is provided with an air inlet for introducing inert gas or reactive gas;
the fluidized reaction system comprises a fluidized reaction hot temperature zone and a fluidized reaction furnace tube, wherein the fluidized reaction furnace tube is positioned in the fluidized reaction hot temperature zone;
an intermediate collection system comprising an intermediate collection tank provided with an intermediate collection port and an air outlet port;
the first heating furnace tube is directly or indirectly communicated with the fluidization reaction furnace tube; and
the fluidized reaction furnace tube is directly or indirectly communicated with the intermediate collecting tank.
2. The fluidized bed tube furnace system of claim 1, wherein a screen and/or a dust catcher is disposed within the fluidized reaction tube.
3. The fluidized bed tube furnace system of claim 2, wherein the screen is positioned at a bottom of the fluidized reaction tube and the dust collector is positioned at a top of the fluidized reaction tube.
4. The fluidized bed tube furnace system of claim 2, wherein the fluidized reaction furnace tube is of an drift diameter structure or a profiled structure;
and/or the special-shaped structure is provided with a first section part and a second section part, the second section part is positioned above the first section part, the diameter of the second section part is larger than that of the first section part, the filter screen is positioned at the first section part, and the dust remover is positioned at the second section part.
5. The fluidized bed tube furnace system of claim 1, wherein the first heating furnace tube comprises a profiled curved furnace tube.
6. The fluidized bed tube furnace system according to claim 1, wherein the intermediate collection tank has a double-layer structure, and a cooling medium can be introduced between the layers;
and/or the intermediate collecting system further comprises a cooling device for cooling the gas introduced into the intermediate collecting tank.
7. The fluidized bed tube furnace system of claim 6, wherein the cooling medium is circulating cooling water.
8. The fluidized bed tube furnace system of claim 1, wherein the first heating furnace tube comprises two or more heating furnace tubes, and the first heating temperature zone comprises two or more heating temperature zones corresponding to the two or more heating furnace tubes.
9. The fluidized bed tube furnace system of claim 2, wherein the fluidized reaction furnace tube is further provided with a powder material positioned between the screen and the dust collector;
and/or the powder material is arranged on the surface of the filter screen.
10. The fluidized bed tube furnace system according to any one of claims 1 to 9, further comprising: the second heating system comprises a connecting heating furnace tube and a connecting heating temperature zone, the second heating system is arranged between the fluidization reaction system and the intermediate collecting system, and the connecting heating furnace tube is communicated with the fluidization reaction furnace tube and the intermediate collecting tank.
11. The fluidized bed tube furnace system according to any one of claims 1 to 9, further comprising: and the heat exchange device is used for realizing heat exchange between the intermediate gas which is introduced into the intermediate collecting system by the fluidization reaction system and the raw material gas which is introduced into the first heating system.
12. The fluidized bed tube furnace system of claim 11, wherein the heat exchange device is disposed on an outer wall of the intermediate collection tank.
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| CN202320237383.9U CN219415694U (en) | 2023-02-15 | 2023-02-15 | Fluidized bed tube furnace system for producing two-dimensional material by gas phase method |
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| CN202320237383.9U CN219415694U (en) | 2023-02-15 | 2023-02-15 | Fluidized bed tube furnace system for producing two-dimensional material by gas phase method |
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