Fluidized bed reactor

Abstract

The utility model provides a fluidized bed reactor. The fluidized bed reactor comprises a growth container, a first gas distributor, a pressure acquisition element and a feeding control device, the growth container is provided with a feeding hole and a first air inlet which are sequentially formed from top to bottom in the height direction; the feeding control device is arranged on the feeding hole; the pressure acquisition element and the first gas distributor are arranged on the inner wall of the growth container; the first gas distributor is provided with a gas inlet and a gas injection port which are communicated with each other, the gas inlet is communicated with the first gas inlet, and the gas injection port is formed in the direction away from the inner wall and used for injecting gas into the growth container; wherein the pressure collecting element is used for collecting the internal pressure of the growth container, and the feeding control device is used for adjusting at least one of the feeding amount of the feeding opening and the injection amount of the gas injection opening according to the internal pressure.

Description

Technical Field

[0001] The present application belongs to the field of fluidized bed technology, and more specifically, relates to a fluidized bed reactor. Background Art

[0002] Carbon nanotubes are one-dimensional quantum materials with a special structure. The radial size of carbon nanotubes is in the nanometer range, the axial size of carbon nanotubes is in the micrometer range, and the axial ends of carbon nanotubes are generally sealed. Carbon nanotubes have excellent mechanical, optical and thermal properties, so they are widely used in many fields such as manufacturing, microelectronics, energy storage, environment, biotechnology, etc. Fluidized bed reactors are used to prepare carbon nanotubes in batches because they can provide superior conditions in terms of growth space, diffusion heat transfer, easy amplification and continuous operation.

[0003] In the process of preparing carbon nanotubes, whether the fluidization of the particles in the reactor is good directly affects the feasibility of mass production of carbon nanotubes and the quality of the finished carbon nanotubes. Fluidization can be understood as the state of agglomeration and flow formed by the interaction between particles and gas, between different particles, and between particles and the inner wall of the reactor in the reactor. Therefore, it is urgent to provide a method that can easily prepare carbon nanotubes in batches by controlling the fluidization process in the reactor. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a fluidized bed reactor, so as to facilitate the batch preparation of carbon nanotubes by controlling the fluidization process in the reactor.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] A fluidized bed reactor is provided, the fluidized bed reactor comprising a growth container, a first gas distributor, a pressure collection element and a feed control device;

[0007] The growth container has a feed port and a first gas inlet arranged in sequence from top to bottom along the height direction; the feed control device is arranged on the feed port, and the pressure collection element and the first gas distributor are both arranged on the inner wall of the growth container; the first gas distributor has a gas inlet and a gas injection port that are interconnected, the gas inlet is connected to the first gas inlet, and the gas injection port is opened in a direction away from the inner wall, for injecting gas into the interior of the growth container;

[0008] The pressure collecting element is used to collect the internal pressure of the growth container, and the feed control device is used to adjust at least one of the feed amount of the feed port and the injection amount of the gas injection port according to the internal pressure.

[0009] In some embodiments, the first gas distributor includes a body portion and a plurality of injection portions;

[0010] The main body portion extends along the circumferential direction of the inner wall, and the main body portion has the gas inlet;

[0011] The plurality of injection parts are respectively communicated with the main body, and each of the injection parts has the gas injection port.

[0012] In some embodiments, the fluidized bed reactor comprises a plurality of the pressure collection elements and a plurality of the first gas distributors, the pressure collection elements and the first gas distributors are arranged one to one, and the plurality of the pressure collection elements and the plurality of the first gas distributors are arranged alternately from top to bottom along the height direction;

[0013] Wherein, the feed control device is used to adjust the injection amount of the corresponding first gas distributor according to the internal pressure collected by the pressure collection element.

[0014] In some embodiments, the fluidized bed reactor further comprises a second gas distributor and an air volume collection element, wherein the second gas distributor comprises a main plate portion and a plurality of plate holes penetrating the main plate portion;

[0015] The main plate portion is arranged on the cross section of the growth container, the periphery of the main plate portion is adapted to the inner wall of the growth container, and the main plate portion is located between the first air inlet and the first gas distributor closest to the first air inlet;

[0016] Among them, the air volume collection element is arranged on the main plate part, and is used to collect the air volume flowing through the main plate part. The feed control device is used to adjust at least one of the feed amount of the feed port and the injection amount of the gas injection port according to the internal pressure and the air volume.

[0017] In some embodiments, the feed port includes a first feed port and a second feed port, and the feed control device is provided on the first feed port and the second feed port;

[0018] Among them, one of the first feed port and the second feed port is used to feed the catalyst, and the other is used to feed the fluidization aid, and the feed control device is used to adjust the feed amount of at least one of the first feed port and the second feed port according to the internal pressure and the air volume.

[0019] In some embodiments, the fluidized bed reactor further comprises a magnetic field device, the magnetic field device extends along the circumference of the growth container, the magnetic field device is arranged in close contact with the inner wall of the growth container, and the magnetic field device is arranged between the main plate portion and the first gas distributor closest to the main plate portion;

[0020] Among them, the magnetic field device is used to generate an effective magnetic field, and the feed control device is used to adjust at least one of the feed amount of the feed port and the injection amount of the gas injection port according to the internal pressure and the wind volume, and adjust the field strength of the effective magnetic field.

[0021] In some embodiments, the fluidized bed reactor further comprises an infrared imaging device, wherein the infrared imaging device and the pressure collecting element are integrated, wherein the infrared imaging device is used to connect to a remote terminal, and wherein the infrared imaging device is used to obtain a fluidized image in the growth container.

[0022] In some embodiments, the fluidized bed reactor comprises a plurality of the pressure collection elements, and the plurality of the pressure collection elements are arranged at intervals along the circumference of the main body.

[0023] In some embodiments, the fluidized bed reactor includes a plurality of the air volume collecting elements, and the plurality of the air volume collecting elements are distributed at intervals on the plate portion.

[0024] In some embodiments, a plurality of plate holes are provided on the plate portion, and the number of the plate holes is the same as or different from the number of the air volume collecting elements.

[0025] The beneficial effects of the fluidized bed reactor provided in this application are:

[0026] Compared with the prior art, the fluidized bed reactor provided in the present application comprises a growth container having a feed port and a first air inlet arranged in sequence from top to bottom along the height direction, wherein the feed port is used for feeding the catalyst and fluidizing aid required for the fluidized state, and the first air inlet is used for introducing the gas flowing from bottom to top, and the catalyst and the fluidizing aid are in a fluidized state under the action of the gas introduced through the first air inlet.

[0027] The feed control device is arranged on the feed port, the pressure collection element and the first gas distributor are arranged on the inner wall of the growth container, the first gas distributor has a gas inlet and a gas injection port which are interconnected, the gas inlet is connected to the first gas inlet, and the gas injection port is opened in a direction away from the inner wall for injecting gas into the interior of the growth container. The pressure collection element is used to collect the internal pressure of the growth container, and the feed control device is used to adjust at least one of the feed amount of the feed port and the injection amount of the gas injection port according to the internal pressure.

[0028] In this way, under the action of the bottom-up airflow provided by the first air inlet, and then through the internal pressure collected by the pressure collection element, the feed amount of the feed inlet and at least one of the injection amount of the gas injection port are controlled by the feed control device. The gas amount in the growth container can be matched with the feed amount, and the two can be adapted to the amount required for the optimal fluidization state, thereby achieving the optimal fluidization state inside the growth container, and facilitating the batch preparation of high-quality carbon nanotubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic diagram of a fluidized bed reactor provided in an embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of the first gas distributor provided in an embodiment of the present application.

[0032] Among them, the reference numerals in the figure are:

[0033] 100. Fluidized bed reactor;

[0034] 101. Growth container; 102. First gas distributor; 103. Pressure collection element; 104. Feed control device; 105. Second gas distributor; 106. Air volume collection element; 107. Magnetic field device; 108. Gas-solid separation device; 109. Purification container; 110. Discharge slide valve;

[0035] 1011, feed inlet; 1012, first air inlet;

[0036] 1011a, first feed inlet; 1011b, second feed inlet;

[0037] 1021, main body; 1022, injection part;

[0038] 1021a, gas inlet; 1022a, gas injection port;

[0039] 1091. Second air inlet; 1092. Exhaust port. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] The fluidized bed reactor 100 provided in the embodiment of the present application is now described.

[0045] See also Figure 1 and Figure 2 As shown, the fluidized bed reactor 100 provided in the embodiment of the present application includes a growth container 101 , a first gas distributor 102 , a pressure collection element 103 and a feed control device 104 .

[0046] The growth container 101 has a feed port 1011 and a first gas inlet 1012 arranged in sequence from top to bottom along the height direction. The feed control device 104 is arranged on the feed port 1011, and the pressure collection element 103 and the first gas distributor 102 are both arranged on the inner wall of the growth container 101. The first gas distributor 102 has a gas inlet 1021a and a gas injection port 1022a that are interconnected. The gas inlet 1021a is connected to the first gas inlet 1012, and the gas injection port 1022a is opened in a direction away from the inner wall for injecting gas into the interior of the growth container 101.

[0047] The pressure collection element 103 is used to collect the internal pressure of the growth container 101, and the feed control device 104 is used to adjust at least one of the feed amount of the feed port 1011 and the injection amount of the gas injection port 1022a according to the internal pressure.

[0048] The fluidized bed reactor 100 provided in the present application comprises a growth container 101 having a feed port 1011 and a first air inlet 1012 sequentially arranged from top to bottom along the height direction, wherein the feed port 1011 is used for feeding the catalyst and fluidizing aid required for the fluidized state, and the first air inlet 1012 is used for introducing gas flowing from bottom to top, and the catalyst and the fluidizing aid are in a fluidized state under the action of the gas introduced through the first air inlet 1012.

[0049] The feed control device 104 is arranged on the feed port 1011, the pressure collection element 103 and the first gas distributor 102 are both arranged on the inner wall of the growth container 101, the first gas distributor 102 has a gas inlet 1021a and a gas injection port 1022a which are interconnected, the gas inlet 1021a is connected to the first gas inlet 1012, and the gas injection port 1022a is opened in a direction away from the inner wall for injecting gas into the growth container 101. The pressure collection element 103 is used to collect the internal pressure of the growth container 101, and the feed control device 104 is used to adjust at least one of the feed amount of the feed port 1011 and the injection amount of the gas injection port 1022a according to the internal pressure.

[0050] In this way, under the action of the bottom-up airflow provided by the first air inlet 1012, and then through the internal pressure collected by the pressure collection element 103, the feed control device 104 is used to control at least one of the feed amount of the feed inlet 1011 and the injection amount of the gas injection port 1022a. The gas amount in the growth container 101 can be matched with the feed amount, and the two can be adapted to the amount required for the optimal fluidized state, thereby achieving the optimal fluidized state inside the growth container 101, which facilitates the batch preparation of high-quality carbon nanotubes.

[0051] like Figure 2 As shown, in some embodiments, the first gas distributor 102 includes a body 1021 and a plurality of injection parts 1022. The body 1021 extends along the circumference of the inner wall, and the body 1021 has a gas inlet 1021a. The plurality of injection parts 1022 are respectively connected to the body 1021, and each injection part 1022 has a gas injection port 1022a.

[0052] The main body 1021 may be in a ring shape and have a passage extending circumferentially through the growth container 101 . A gas inlet 1021a may be provided at any position of the passage circumferentially. The gas inlet 1021a may be directly or indirectly connected to the first gas inlet 1012 .

[0053] The gas from the first gas inlet 1012 is directed to the circumference of the growth container 101 through the main body 1021 and is arranged near the inner wall, so that the gas can be sprayed from the inner wall toward the central area of ​​the growth container 101 through the main body 1021. In addition to the first gas inlet 1012 providing a bottom-up airflow direction, the direction of spraying the gas from different circumferential positions toward the central area of ​​the growth container 101 is added, making the direction of the gas in the growth container 101 more diversified, which is conducive to the gas fully contacting the feed from the feed port 1011 from different directions, and is more conducive to forming a better fluidized state inside the growth container 101.

[0054] The injection part 1022 can be a straight tube shape. The injection part 1022 is integrally formed on the main body 1021. The two are made of the same material. The injection part 1022 is arranged on the side of the main body 1021 away from the inner wall. Multiple injection parts 1022 are evenly spaced along the circumference of the main body 1021.

[0055] By setting up multiple injection parts 1022, each injection part 1022 has a gas injection port 1022a, and the multiple gas injection ports 1022a are evenly arranged along the circumference. The multiple gas injection ports 1022a provide injection gas from different circumferential positions, so that the feed in the central area can receive injection gas from different directions, and the feed is further fully contacted with the gas, so that the interior of the growth container 101 reaches an optimal fluidized state.

[0056] In some embodiments, the fluidized bed reactor 100 includes a plurality of pressure collection elements 103 and a plurality of first gas distributors 102, the pressure collection elements 103 and the first gas distributors 102 are arranged one to one, and the plurality of pressure collection elements 103 and the plurality of first gas distributors 102 are arranged alternately from top to bottom along the height direction. The feed control device 104 is used to adjust the injection amount of the corresponding first gas distributor 102 according to the internal pressure collected by the pressure collection element 103.

[0057] Among them, the pressure collection element 103 and the first gas distributor 102 are arranged one to one, and in the actual design, the paired pressure collection element 103 and the first gas distributor 102 can be close to each other, and the pressure collection element 103 can specifically collect the pressure near the corresponding first gas distributor 102, so that the feed control device 104 can specifically control the gas injection amount of the corresponding first gas distributor 102 through the internal pressure collected by the pressure collection element 103.

[0058] There are multiple pressure collection elements 103 and multiple first gas distributors 102, and the multiple pressure collection elements 103 and the multiple first gas distributors 102 are alternately arranged from top to bottom along the height direction. That is, a pair of pressure collection elements 103 and first gas distributors 102 can be arranged at different positions in the height direction of the growth container 101, so that the pressure at different positions or different areas in the height direction inside the growth container 101 can be collected in a targeted manner, and the corresponding first gas distributor 102 can be controlled in a targeted manner according to the internal pressure collected in a targeted manner, so that the feed and the gas are further fully contacted, so that the inside of the growth container 101 reaches the best fluidized state.

[0059] In some embodiments, the fluidized bed reactor 100 further includes a second gas distributor 105 and an air volume collection element 106, the second gas distributor 105 includes a main plate portion and a plurality of plate holes penetrating the main plate portion; the main plate portion is arranged on the cross section of the growth container 101, the periphery of the main plate portion is adapted to the inner wall of the growth container 101, and the main plate portion is located between the first air inlet 1012 and the first gas distributor 102 closest to the first air inlet 1012; wherein the air volume collection element 106 is arranged on the main plate portion, for collecting the air volume flowing through the main plate portion, and the feed control device 104 is used to adjust at least one of the feed amount of the feed port 1011 and the injection amount of the gas injection port 1022a according to the internal pressure and the air volume.

[0060] By adding an air volume collection element 106 and the above-mentioned pressure collection element 103, the air volume of the gas entering from the first air inlet through the plate hole into the growth container 101 is obtained, and the internal pressure of the space above the plate hole is added. The feed control device 104 adjusts at least one of the feed amount of the feed port 1011 and the injection amount of the gas injection port 1022a according to these two parameters, so as to further optimize the fluidization state inside the growth container 101.

[0061] In some embodiments, the feed port 1011 includes a first feed port 1011a and a second feed port 1011b, and the feed control device 104 is disposed on the first feed port 1011a and the second feed port 1011b. One of the first feed port 1011a and the second feed port 1011b is used to feed a catalyst, and the other is used to feed a fluidization aid, and the feed control device 104 is used to adjust the feed amount of at least one of the first feed port 1011a and the second feed port 1011b according to the internal pressure and the air volume.

[0062] By setting the first feed port 1011a and the second feed port 1011b, the catalyst and the fluidization aid are fed respectively through the first feed port 1011a and the second feed port 1011b, so that the feed control device 104 can control one of the first feed port 1011a and the second feed port 1011b individually, or control the first feed port 1011a and the second feed port 1011b at the same time, so that the control of the feed is more refined, which is more conducive to achieving the optimal fluidization state inside the growth container 101.

[0063] In some embodiments, the fluidized bed reactor 100 further includes a magnetic field device 107, which extends along the circumference of the growth container 101, is arranged in close contact with the inner wall of the growth container 101, and is arranged between the plate portion and the first gas distributor 102 closest to the plate portion. The magnetic field device 107 is used to generate an effective magnetic field, and the feed control device 104 is used to adjust at least one of the feed amount of the feed port 1011 and the injection amount of the gas injection port 1022a according to the internal pressure and the air volume, and to adjust the field strength of the effective magnetic field.

[0064] By adding a magnetic field device 107 and using the feed control device 104 to adjust at least one of the feed amount of the feed port 1011 and the injection amount of the gas injection port 1022a according to the internal pressure and wind volume, as well as adjusting the field strength of the acting magnetic field, various factors affecting the fluidization state inside the growth container 101 can be more accurately controlled, so as to maximize the fluidization state inside the growth container 101 and make it reach the best.

[0065] By way of example, in some embodiments, two pressure collection elements 103 and two first gas distributors 102 are disposed on the inner wall of the growth container 101 .

[0066] For the pressure collection element 103 located at the top, when the internal pressure obtained is less than 0.1 MPa, the feed control device 104 increases the feed amount of the first feed port 1011a and the second feed port 1011b at the same time according to the internal pressure. When the internal pressure obtained is greater than 0.1 MPa and less than 0.5 MPa, the feed control device 104 controls the gas injection amount of the gas injection port 1022a of the first gas distributor 102 according to the internal pressure. When the internal pressure obtained is greater than 0.5 MPa, the feed control device 104 adjusts the gas injection amount of the gas injection port 1022a of the first gas distributor 102 according to the internal pressure, and reduces the feed amount of the first feed port 1011a and the second feed port 1011b.

[0067] For the pressure collection element 103 located below, when the internal pressure obtained is less than 0.2 MPa, the feed control device 104 increases the feed amount of the first feed port 1011a and the second feed port 1011b at the same time according to the internal pressure. When the internal pressure obtained is greater than 0.2 MPa and less than 0.6 MPa, the feed control device 104 controls the gas injection amount of the gas injection port 1022a of the first gas distributor 102 according to the internal pressure. When the internal pressure obtained is greater than 0.6 MPa, the feed control device 104 adjusts the gas injection amount of the gas injection port 1022a of the first gas distributor 102 according to the internal pressure, reduces the feed amount of the first feed port 1011a and the second feed port 1011b, and turns on the magnetic field device 107.

[0068] As an example, in some embodiments, the air volume collecting element 106 collects the air volume of the plate hole. When the air volume is small, the feed control device 104 increases the magnetic field of the magnetic field device 107 according to the air volume, and reduces the feed amount of the first feed port 1011a and the second feed port 1011b; when the air volume is large, the feed control device 104 reduces the magnetic field of the magnetic field device 107 according to the air volume, and increases the feed amount of the first feed port 1011a and the second feed port 1011b.

[0069] In some embodiments, the fluidized bed reactor 100 further includes an infrared imaging device, which is integrated with the pressure collection element 103 . The infrared imaging device is used to connect to a remote terminal and to obtain fluidized images in the growth container 101 .

[0070] The infrared imaging device may include but is not limited to an infrared imager. The infrared imager may also be arranged on the inner wall of the growth container 101. The display end of the infrared imager is located at the remote terminal of the feed control device 104, and the remote terminal is operated by manual control. The pressure collection element 103 may be used to detect the particle size of the fluidized particles in the area adjacent to the location where it is set, and the particle size reflects the pressure nearby. The infrared imager is used to intuitively judge the aggregation state, and the fluidization state and reaction process in the growth container 101 are judged based on the pressure collection element 103 and the infrared imager, and the fluidization state is timely adjusted through the first gas distributor 102 and the feed amount accordingly to ensure the stability of the reaction process.

[0071] In some embodiments, the fluidized bed reactor 100 includes a plurality of pressure collection elements 103, which are arranged at intervals along the circumference of the body 1021. The plurality of pressure collection elements 103 arranged along the circumference further improves the accuracy of the pressure value obtained, thereby ensuring a more accurate adjustment of the gas injection amount of the first gas distributor 102.

[0072] In some embodiments, the fluidized bed reactor 100 includes a plurality of air volume collection elements 106, and the plurality of air volume collection elements 106 are distributed at intervals on the plate portion. In some embodiments, the plate portion is provided with a plurality of plate holes, and the number of the plate holes is the same as or different from the number of the air volume collection elements 106. The ventilation volume of different areas is accurately obtained through the plurality of air volume collection elements 106, so as to ensure more accurate adjustment of the feed amount and the first gas distributor 102.

[0073] In some embodiments, the carbon nanotube catalyst contains at least one metal element selected from the group consisting of iron, molybdenum, cobalt, nickel, titanium, vanadium, chromium, manganese, ruthenium, lead, silver, platinum, and gold.

[0074] The fluidized bed reactor 100 may also include an activation container, which is disposed on the top of the growth container 101. The activated carbon nanotube catalyst may directly enter the growth container 101 from the bottom of the activation container through the top of the growth container 101, thereby simplifying the production process.

[0075] In some specific embodiments, during actual use, the feed control device 104 can be set to open and close a sliding door, an electric door, etc. as needed. After the activation of the catalyst in the activation container is completed, the door provided for communication is opened to enter the growth container 101. The feed control device 104 can control the feed amount of the feed port 1011 by the opening and closing size of the sliding door or the electric door.

[0076] The fluidized bed reactor 100 may further include a purification container 109, and a gas-solid separation device 108 may be provided on the upper part of the activation container. The separated crude product may be transported to the purification container 109 through its pipeline for purification, and the separated tail gas may be directly discharged from the activation container through the pipeline. The purification container 109 is provided with a second air inlet 1091 and an exhaust port 1092 arranged sequentially from top to bottom along its height direction, and a discharge slide valve 110 may be provided between the second air inlet 1091 and the exhaust port 1092. The purification container 109 is used to oxidize and remove oxidizable impurities such as carbon in the crude product.

[0077] A screen is provided in the gas-solid separation device 108 for screening the crude product, and the crude product with qualified particle size is transported to the purification container 109, and the crude product with unqualified particle size is returned to the growth container 101 to continue catalytic growth of carbon nanotubes. The gas-solid separation device 108 can separate the crude carbon nanotube product and gas in the growth container 101, and the crude carbon nanotube product separated by the gas-solid separation device 108 is screened through the screen, and the large-particle crude carbon nanotube product is directly transported to the purification container 109 for purification, and the small-particle crude product can be returned to the growth container 101 through the screen to catalytic growth of carbon nanotubes again.

[0078] The carbon source gas and the inert atmosphere are introduced from the first gas inlet 1012 at the bottom of the growth container 101, and the first gas distributor 102 outputs the inert atmosphere along the inside of the growth container 101. The carbon source gas and the inert atmosphere are introduced from the bottom of the growth container 101, which can not only fully contact with the activated catalyst, but also help to improve the fluidization effect of the activated catalyst. At the same time, the first gas distributor 102 outputs the inert atmosphere along the inside of the growth container 101, which can not only further adjust the fluidization state of the material, improve the uniformity of the temperature distribution and concentration distribution in the growth container 101, improve the gas-solid contact efficiency, and enable the product to enter the separator for discharge better; it is also helpful to prevent sintering and carbon deposition on the furnace wall.

[0079] The carbon source gas includes, but is not limited to, at least one of propylene, ethylene, hexane, acetylene, methane, butane, carbon monoxide, benzene, and ethanol. At least one carbon source gas of acetylene, ethylene, hexane, methane, propylene, butane, carbon monoxide, benzene, and ethanol used in the embodiment of the present application can be rapidly and stably cracked into carbon atoms under the condition of a temperature of 660 to 680°C, providing a material basis for the subsequent rapid, efficient, and stable growth of carbon nanotubes. Propylene is preferably used as the carbon source gas, and the reaction is easy to control. The inert atmosphere includes at least one of nitrogen, argon, and helium, and the carbon source gas and the inert atmosphere enter from the bottom air inlet of the growth container 101.

[0080] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fluidized bed reactor (100), characterized in that: The fluidized bed reactor (100) comprises a growth container (101), a first gas distributor (102), a pressure collection element (103) and a feed control device (104); The growth container (101) has a feed port (1011) and a first gas inlet (1012) which are arranged in sequence from top to bottom along the height direction; the feed control device (104) is arranged on the feed port (1011), and the pressure collection element (103) and the first gas distributor (102) are both arranged on the inner wall of the growth container (101); the first gas distributor (102) has a gas inlet (1021a) and a gas injection port (1022a) which are interconnected, the gas inlet (1021a) is connected to the first gas inlet (1012), and the gas injection port (1022a) is opened in a direction away from the inner wall, and is used to inject gas into the interior of the growth container (101); The pressure collecting element (103) is used to collect the internal pressure of the growth container (101), and the feed control device (104) is used to adjust at least one of the feed amount of the feed port (1011) and the injection amount of the gas injection port (1022a) according to the internal pressure.

2. The fluidized bed reactor (100) according to claim 1, characterized in that: The first gas distributor (102) comprises a main body (1021) and a plurality of injection parts (1022); The main body (1021) extends along the circumference of the inner wall, and the main body (1021) has the gas inlet (1021a); The plurality of injection parts (1022) are respectively connected to the main body (1021), and each of the injection parts (1022) has the gas injection port (1022a).

3. The fluidized bed reactor (100) according to claim 1 or 2, characterized in that: The fluidized bed reactor (100) comprises a plurality of the pressure collection elements (103) and a plurality of the first gas distributors (102), the pressure collection elements (103) and the first gas distributors (102) are arranged one to one, and the plurality of the pressure collection elements (103) and the plurality of the first gas distributors (102) are arranged alternately from top to bottom along the height direction; The feed control device (104) is used to adjust the injection amount of the corresponding first gas distributor (102) according to the internal pressure collected by the pressure collection element (103).

4. The fluidized bed reactor (100) according to claim 3, characterized in that: The fluidized bed reactor (100) further comprises a second gas distributor (105) and an air volume collecting element (106), wherein the second gas distributor (105) comprises a main plate portion and a plurality of plate holes penetrating the main plate portion; The main plate portion is arranged on the cross section of the growth container (101), the periphery of the main plate portion is adapted to the inner wall of the growth container (101), and the main plate portion is located between the first gas inlet (1012) and the first gas distributor (102) closest to the first gas inlet (1012); Wherein, the air volume collecting element (106) is arranged on the main plate portion, and is used to collect the air volume flowing through the main plate portion, and the feed control device (104) is used to adjust at least one of the feed volume of the feed port (1011) and the injection volume of the gas injection port (1022a) according to the internal pressure and the air volume.

5. The fluidized bed reactor (100) according to claim 4, characterized in that: The feed port (1011) comprises a first feed port (1011a) and a second feed port (1011b), and the feed control device (104) is arranged on the first feed port (1011a) and the second feed port (1011b); Among them, one of the first feed port (1011a) and the second feed port (1011b) is used to feed the catalyst, and the other is used to feed the fluidization aid, and the feed control device (104) is used to adjust the feed amount of at least one of the first feed port (1011a) and the second feed port (1011b) according to the internal pressure and the air volume.

6. The fluidized bed reactor (100) according to claim 4 or 5, characterized in that: The fluidized bed reactor (100) further comprises a magnetic field device (107), the magnetic field device (107) extending along the circumference of the growth container (101), the magnetic field device (107) being arranged in close contact with the inner wall of the growth container (101), and the magnetic field device (107) being arranged between the main plate portion and the first gas distributor (102) closest to the main plate portion; The magnetic field device (107) is used to generate an effective magnetic field, and the feed control device (104) is used to adjust at least one of the feed amount of the feed port (1011) and the injection amount of the gas injection port (1022a) according to the internal pressure and the wind volume, and to adjust the field strength of the effective magnetic field.

7. The fluidized bed reactor (100) according to claim 3, characterized in that: The fluidized bed reactor (100) further comprises an infrared imaging device, which is integrated with the pressure collection element (103). The infrared imaging device is used to connect to a remote terminal and to obtain a fluidized image in the growth container (101).

8. The fluidized bed reactor (100) according to claim 2, characterized in that: The fluidized bed reactor (100) comprises a plurality of the pressure collection elements (103), and the plurality of the pressure collection elements (103) are arranged at intervals along the circumference of the main body.

9. The fluidized bed reactor (100) according to claim 4, characterized in that: The fluidized bed reactor (100) comprises a plurality of the air volume collecting elements (106), and the plurality of the air volume collecting elements (106) are distributed at intervals on the plate portion.

10. The fluidized bed reactor (100) according to claim 9, characterized in that: The main plate portion is provided with a plurality of plate holes, and the number of the plate holes is the same as or different from the number of the air volume collecting elements (106).

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