CN216038665U

CN216038665U - Device for continuously and circularly preparing carbon nano tube

Info

Publication number: CN216038665U
Application number: CN202122420922.6U
Authority: CN
Inventors: 岳山; 岳凡钦
Original assignee: Chengdu Kehui Electromechanical Technology Co ltd
Current assignee: Chengdu Kehui Electromechanical Technology Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-03-15
Anticipated expiration: 2031-10-08

Abstract

The utility model relates to the technical field of carbon nanotube preparation, and discloses a device for continuously and circularly preparing carbon nanotubes, which comprises two push generation units which are connected end to end in a sealing way, wherein carriers for containing catalysts are circularly arranged in the two push generation units; the pushing generation unit is formed by sequentially and hermetically connecting a feeding glove box, a cracking furnace, a receiving glove box and a discharging glove box; the discharging glove box is characterized in that a negative pressure receiving cabin is arranged at the bottom of the discharging glove box and is communicated with the receiving glove box through a material sucking channel, and a quick opening valve is arranged at the bottom of the material sucking channel. The utility model has the beneficial effects that: the continuous and cyclic production of the carbon nano tube in a stable sealing system can be realized; the cracking time of the carbon source gas under the action of the catalyst can be accurately controlled; and the product quality and the safety and reliability of the production device can be greatly improved.

Description

Device for continuously and circularly preparing carbon nano tube

Technical Field

The utility model relates to the technical field of carbon nanotube preparation, in particular to a device for continuously and circularly preparing carbon nanotubes.

Background

The carbon nano material is a material with at least one dimension of the dimension of a dispersed phase smaller than 100nm, the carbon nano material reported at present comprises carbon nano fibers, graphene, nano carbon spheres and the like, and the carbon nano tube is regarded as the finest fiber accepted in the world; the materials have good conductivity, high mechanical property and high specific surface area, and play an important role in the technical field of renewable energy conversion such as electrochemical catalysis and energy storage. The macro carbon nanotube preparing process is mainly chemical vapor deposition process, which includes cracking hydrocarbon with catalyst, using active metal atom as catalyst crystal nucleus and depositing carbon atom to form carbon nanotube. According to the principle of the chemical vapor deposition method, the more fully the active main component of the catalyst is contacted with the carbon source gas, the more carbon atoms generated by the cracking of the carbon-hydrogen bond are deposited and grown on the surface of the active metal, the more carbon nanotubes are grown, and the better the growth morphology is. In engineering production, the chemical deposition method is mainly implemented by a boiling method (also called a fluidized bed method). The boiling method uses nitrogen to blow and suspend the catalyst in a well type furnace filled with hydrocarbon, the carbon source gas and the catalyst active metal are fully contacted, and the carbon nano tube grows better, however, the boiling method has the defects that the nitrogen pressure is unstable, the growth process is difficult to control, and the like, and meanwhile, a large amount of nitrogen is flushed in the carbon source gas environment to dilute the carbon source gas, so that the carbon source gas needs to be flushed in a large amount for ensuring the growth of the carbon nano tube, on one hand, the pressure in the well type furnace cannot be too high, and in order to keep a certain pressure, a large amount of gas in the furnace needs to be discharged, so that a large amount of carbon source gas is discharged without cracking, the conversion rate of the carbon source gas is low, the environmental pollution is large, and the like.

The cracking time of the carbon source gas directly influences the pipe diameter, the specific surface area, the electric conductivity, the appearance and the like of the carbon nano tube, the cracking time is too short, and the specific surface area, the electric conductivity and the appearance are poor; and the carbon deposition is increased after the time is too long.

The equipment in the prior art has poor continuity, is difficult to ensure the continuous production of the carbon nano tube in a stable internal environment, and is not beneficial to industrial production.

In order to solve the technical problems, the utility model provides a device for continuously and circularly preparing carbon nanotubes.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a device for continuously and circularly preparing carbon nanotubes.A carrier filled with a catalyst is intermittently pushed in a furnace tube, and the problem that the cracking time of a carbon source gas cannot be accurately controlled is solved by controlling the intermittent time; the continuous and stable production of the carbon nano tube is realized by circulating the carrier in two pushing generation units which are hermetically communicated from head to tail; only carbon source gas is used in the cracking furnace, and the atmosphere in the sealing system is stable, so that the product quality and the production safety are greatly improved.

The purpose of the utility model is realized by the following technical scheme:

the device for preparing the carbon nano tube in a continuous cycle mode comprises the following steps:

the device comprises two push generation units which are connected end to end in a sealing way, wherein carriers for containing catalysts are circulated in the two push generation units;

the pushing generation unit is formed by sequentially and hermetically connecting a feeding glove box, a cracking furnace, a receiving glove box and a discharging glove box;

and a negative pressure material receiving cabin is arranged at the bottom of the discharging glove box.

Furthermore, the negative pressure material receiving cabin is communicated with the material receiving glove box through a material suction channel, and the bottom of the material suction channel is provided with a quick opening valve.

Furthermore, 1-4 cracking furnace tubes are arranged in the cracking furnace, the feed ends of the cracking furnace tubes are communicated with a feeding glove box, and the discharge ends of the cracking furnace tubes are communicated with a receiving glove box;

cracking furnace tube feed end department is connected with the waste gas pipe, and discharge end department is connected with carbon source gas intake pipe, and carrier circulation direction and carbon source gas circulation opposite direction. The catalyst is pushed in the cracking furnace tube through the carrier in the direction opposite to the carbon source airflow direction, the heat of the waste gas is fully utilized to preheat the catalyst, the cracking growth of the carbon nano tube is facilitated, meanwhile, the heat energy of the waste gas is fully utilized, and the energy consumption is reduced.

Furthermore, the feeding glove box and the discharging glove box, and the discharging glove box and the receiving glove box on the other side are respectively communicated in a sealing mode through a connecting transition cabin;

the feeding glove box is connected with a feeding transition cabin, and the receiving glove box is connected with a fetching transition cabin;

the feeding transition cabin is connected with the feeding glove box, the object taking transition cabin is connected with the material receiving glove box, and door plate assemblies are arranged at two ends of the connection transition cabin respectively. The carrier enters the feeding glove box from the connecting transition cabin and is additionally provided with the catalyst, instead of removing the carrier from the system to separate the carbon nano tubes, the carrier enters the system from the transition cabin, so that the efficiency is improved, the opening of the transition cabin is reduced, and the operation safety is improved; the carrier enters the feeding glove box from the connecting transition cabin to be additionally loaded with the catalyst, instead of removing the carrier from the system to separate the carbon nano tubes, and then the carrier enters the system from the transition cabin, so that the efficiency is improved, the opening of the transition cabin is reduced, and the operation safety is improved.

Furthermore, one end of the cracking furnace tube extends out of the cracking furnace to form a pre-activation section, and the other end of the cracking furnace tube extends out of the cracking furnace to form a removal section;

and a cooling water circulation sleeve is respectively arranged outside the pre-activation section and the moving-out section.

Furthermore, the carbon source gas inlet pipe is connected to the total carbon source gas inlet pipe through the carbon source gas valve in a gathering manner, and the exhaust pipe is connected to the total exhaust pipe through the exhaust valve in a gathering manner.

Furthermore, the discharging glove box is communicated with a pressurizing tank through a pressurizing pipeline, a pressurizing valve is arranged on the pressurizing pipeline, a pressurizing piston is arranged in the pressurizing tank, a feeding hole and a discharging hole are formed in the bottom of the pressurizing tank, the feeding hole is communicated with a main waste gas pipe through a waste gas branch pipe, and the discharging hole is communicated with the discharging glove box through the pressurizing pipeline;

and an air inlet valve is arranged on the waste gas branch pipe, a waste gas valve II is arranged on the main waste gas pipe, and the waste gas valve II is positioned at the downstream of a connecting port of the waste gas branch pipe and the main waste gas pipe.

Furthermore, the boosting piston, the boosting valve, the air inlet valve and the waste gas valve are respectively and electrically connected with the control unit.

Furthermore, the feeding glove box is internally provided with 1-4 pushing platforms corresponding to the feeding hole of the cracking furnace tube, and the receiving glove box is internally provided with a carrier guide groove.

The utility model has the following advantages: (1) the carrier filled with the catalyst is intermittently pushed in the cracking furnace tube, so that the catalyst intermittently moves in the furnace tube, the cracking time of the carbon source gas under the action of the catalyst is controlled by controlling the intermittent time, the cracking growth time of the carbon nano tube is accurately controlled, the pipe diameter, the specific surface area, the electric conductivity, the appearance and the like of the carbon nano tube are accurately controlled, and the generation of amorphous carbon is avoided, so that the operation efficiency and the product quality are favorably improved while the full cracking of the carbon source gas is ensured (the length of the cracking time of the carbon source gas directly influences the pipe diameter, the specific surface area, the electric conductivity, the appearance and the like of the carbon nano tube, the time is too short, the specific surface area, the electric conductivity and the appearance are poor, the time is too long, the carbon deposition is increased), only the carbon source gas exists in the growth environment of the carbon nano tube, other auxiliary gases do not exist, and the carbon source gas can be fully decomposed to prepare the carbon nano tube, the method has the advantages that the method is fully utilized, the materials react completely, and the obtained carbon nano tube has good appearance, uniform particle size, high purity and less impurities;

(2) the continuous production of the carbon nano tubes is realized by internal circulation of two push generation units which are hermetically communicated with each other end to end of the carrier, and after the carbon nano tubes are removed from the system by using low pressure, the pressure in the discharging glove box is recovered by using waste gas through a pressurization pipeline, so that the atmosphere in the sealed system is more stable, the disturbance of airflow in a cracking furnace tube is avoided, the product quality is further ensured during the continuous circulation production, the carrier does not need to be removed from the system in the circulation production process, and the production efficiency and the safety and reliability are greatly improved;

(3) the device is integrated, the structure is simple, different catalysts and different carbon source gases can be prepared by adjusting the intermittent lapse time and the catalyst adding and metering and cracking temperature respectively, one device is universal, the application range of carbon nanotube production is greatly increased, and the possibility of preparing carbon nanotubes of different specifications by the same device is provided.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of a carrier cycle according to the present invention;

FIG. 3 is a schematic view of the material cycle of the present invention;

FIG. 4 is a schematic view of the connection between the negative pressure material receiving chamber and the discharging glove box according to the present invention;

FIG. 5 is a schematic view of the connection of a pressurized canister of the present invention;

in the figure: 1-fetching transition cabin, 2-receiving glove box, 3-discharging glove box, 4-connecting transition cabin, 5-feeding transition cabin, 6-feeding glove box, 7-cracking furnace tube, 8-cracking furnace, 10-negative pressure receiving cabin, 11-sucking material channel, 12-pressurizing tank, 13-total waste gas pipe, 15-waste gas branch pipe, 16-air inlet valve, 17-waste gas valve II, 1201-pressurizing valve, 1202 pressurizing piston, 1203 feeding port, 1204-discharging port.

Detailed Description

The utility model will be further described with reference to the accompanying drawings, but the scope of the utility model is not limited to the following.

As shown in fig. 1 to 5, the apparatus for continuously and circularly preparing carbon nanotubes comprises two feeding glove boxes 6, two cracking furnaces 8, two receiving glove boxes 2, and two discharging glove boxes 3, wherein the feeding glove boxes 6, the cracking furnaces 8, the receiving glove boxes 2, and the discharging glove boxes 3 are sequentially and hermetically communicated to form a shift generation unit, the two shift generation units are connected end to end, that is, the discharging glove box 3 is hermetically communicated with the feeding glove box 6 of another shift generation unit, so that the whole system forms a sealed circulation system, a carrier circulates in the whole system, the feeding glove box 6 is sequentially filled with a catalyst, then a carbon source gas is catalytically cracked in the cracking furnace 8 through the catalyst to prepare carbon nanotubes, then the carrier is recovered in the receiving glove box 2, and then the feeding glove box 6 of the other shift generation unit is filled with the catalyst again and then is sent to the cracking furnace 8 on the other side, therefore, the continuous and cyclic production of the carbon nano tubes is realized, and the carriers are positioned in the sealing system in the whole process, so that the material outside the system does not need to be removed, the production efficiency is greatly increased, and the safety of the device is improved; and the carrier of this scheme need not to shift out the system, has also significantly reduced the required preheating quantity before prior art carrier gets into the cracking boiler tube, and then effectively practices thrift the energy consumption.

Meanwhile, the bottom of the discharging glove box 3 is provided with a negative pressure material receiving cabin 10, so that the carbon nano tube can be removed from the discharging glove box 2 through negative pressure, two cracking furnace tubes 7 are arranged in the cracking furnace 8 in parallel, each cracking furnace tube 7 comprises a cracking growth section positioned in the cracking furnace 8, a pre-activation section 701 formed by extending the cracking furnace tube 7 out of one end of the cracking furnace 8 and a removal section 702 formed by extending the cracking furnace tube 7 out of the other end of the cracking furnace 8, the pre-activation section 701 is in sealed communication with the feeding glove box 6, and the removal section 702 is in sealed communication with the material receiving glove box 2.

In the scheme, an exhaust gas pipe is connected to the preactivation section 701, and a carbon source gas inlet pipe is arranged on the removal section 702, so that a catalyst can be pushed in the cracking furnace tube 7 in a direction opposite to the carbon source gas flow direction through a carrier; before the catalyst enters the cracking growth section, at the preactivation end 701, the waste gas heats the catalyst, hydrogen and metal oxide in the catalyst perform reduction reaction to reduce the metal oxide into a metal simple substance, so that the catalyst is preactivated, then, the preactivated carbon nanotube catalyst enters the cracking growth section along with a carrier, a carbon source gas and the catalyst in the carrier perform complete contact reaction, a carbon-hydrogen bond is fully cracked, carbon atoms are deposited and grown into carbon nanotubes by taking active metal crystal nuclei of the carbon nanotube catalyst as nuclei, and finally, the carbon atoms enter the material receiving glove box 2 from the removal section 702; the two ends of the cracking furnace tube 7 extend out of the two ends of the cracking furnace 8, and the two ends are both cooled, namely, a cooling water circulation sleeve is respectively arranged outside the preactivation section 701 and outside the moving-out section 702, and the cooling water circulation sleeve is arranged, so that on one hand, the situation that the cracking furnace tube 7 is overhigh in temperature is favorably prevented, the heat is transferred to the side plates of the feeding glove box 6 and the receiving glove box 2 at the two ends, the glove boxes at the two ends are overhigh in temperature and are not favorable for operation is avoided, on the other hand, the temperature of the preactivation section 701 can be controlled to be about 500-600 ℃, the catalyst is preactivated in the preactivation section 701, the catalyst can be preheated by fully utilizing the heat of waste gas, the heat energy of the waste gas is fully utilized, the energy consumption of the device is reduced, and the cracking growth of the carbon nano tube is favorably realized.

The beneficial effects of catalyst preheating specifically lie in: the carbon source gas is cracked in the cracking furnace tube 7 to generate carbon atoms and hydrogen atoms, the carbon atoms are deposited in the cracking furnace tube 7 to generate carbon nanotubes, the hydrogen atoms generate hydrogen, the active metal oxide in the pre-activated catalyst is subjected to reduction reaction with the hydrogen at about 500-600 ℃ to generate elemental metal and water, and the water is discharged along with the waste gas in a gaseous state; meanwhile, the preheating section still has hydrocarbon atmosphere with lower concentration, and the catalyst containing simple substance active metal is grown into carbon nano tube embryo before entering the cracking section of the furnace tube, thereby being more beneficial to growing the carbon nano tube in the hydrocarbon gaseous atmosphere with proper concentration in the furnace tube.

In the preparation process, after being shunted by the carbon source gas valve, the carbon source gas enters the two cracking furnace tubes 7 from the two discharge ends of the two cracking furnace tubes 7 through the two carbon source gas inlet tubes, the waste gas in the two cracking furnace tubes 7 is discharged from the corresponding two waste gas tubes respectively, the two waste gas tubes are gathered by the waste gas valve and then connected to the main waste gas tube 13, so that each cracking furnace tube 7 in the cracking furnace 8 independently enters and exhausts gas, the carbon source gas in each cracking furnace tube 7 can independently pass through the furnace tubes, the atmosphere interference in the rest cracking furnace tubes 7 is reduced, and the quality of the prepared carbon nano tubes is improved.

In the scheme, two material pushing platforms are arranged in the feeding glove box 6, carrier guide grooves are arranged in the material receiving glove box 2, the arrangement positions of the material pushing platforms correspond to the feeding ports of the cracking furnace tubes 7, the cracking furnace tubes 7 are pushed into the material pushing platforms along with the intermittent pushing of the carriers, the carriers entering the material receiving glove box after the multiple carriers push the carriers intermittently to move, the pushing modes of the carriers include but are not limited to manual pushing or cylinder pushing, when the cylinders are used for pushing, the cylinders are installed at the material pushing platforms, the action ends of the cylinders can push the carriers into the cracking furnace tubes 7, the carriers horizontally move towards the discharging ends in the cracking furnace tubes 7, and the contact time of catalysts and carbon source gas can be accurately controlled by setting the interval time for pushing the cylinders.

In this scheme, negative pressure material receiving cabin 10 is through inhaling material passageway 11 and receiving material glove box 2 intercommunication, inhales material passageway 11 bottom and is equipped with the fast valve that opens, when the carbon nanotube bagging-off to a certain amount, opens the valve soon and opens, and carbon nanotube is followed 3 bottoms of ejection of compact gloves and is inhaled negative pressure material receiving cabin 10 by the low pressure in inhaling the material passageway, opens the valve soon afterwards and close and accomplish and receive the material.

In this scheme, between pay-off glove box 6 and the ejection of compact glove box 3, respectively through a connection transfer chamber 4 sealed intercommunication between ejection of compact glove box 3 and the receipts of opposite side material glove box 2, connect 4 both ends of transfer chamber and be equipped with a door plant subassembly respectively, in the in-process of carrier circulation through connecting transfer chamber 4, it is when one side door plant subassembly is opened all the time to connect transfer chamber 4, opposite side door plant subassembly is closed, the carrier gets into and connects the back of transfer chamber 4, it closes to get into end door plant subassembly, shift out end door plant subassembly and open, then get into the next glove box that is connected in, thereby can do benefit to the stability of the inside gas environment of entire system, avoid carbon source gas or waste gas direct in pay-off glove box 6, receive material glove box 2, circulation between the ejection of compact glove box 3.

After the negative pressure material receiving cabin 10 receives materials for the first time, the internal pressure of the discharging glove box 3 is rapidly reduced, in order to avoid that the carrier transfers the low pressure in the discharging glove box 3 to the feeding glove box 6 or the discharging glove box 3 in the transfer process, further disturbing the atmosphere in the cracking furnace tube 7 to influence the product quality, the discharging glove box 3 is also connected with a pressurizing pipeline, the pressurizing pipeline is connected to a pressurizing tank 12, a pressurizing piston 1202 for pushing pressurized waste gas into a discharging glove box 3 is arranged inside the pressurizing tank 12, a feeding hole 1203 and a discharging hole 1204 are further formed in the bottom of the pressurizing tank 12, the feeding hole 1203 is communicated with a main waste gas pipe 13 through a waste gas branch pipe 15, the discharging hole 1204 is communicated with the discharging glove box 3 through the pressurizing pipeline, a pressurizing valve 1201 is arranged on the pressurizing pipeline, an air inlet valve 16 is arranged on the waste gas branch pipe 15, a waste gas valve II 17 is arranged on the main waste gas pipe 13, and the waste gas valve II 17 is located on the downstream of a connecting port of the waste gas branch pipe 15 and the main waste gas pipe 13; meanwhile, the booster piston 1202, the booster valve 1201, the inlet valve 16 and the waste gas valve 17 are respectively electrically connected with the control unit, after the negative pressure material receiving cabin 10 finishes the primary material receiving, a quick opening valve in the negative pressure material receiving cabin 10 is closed, the internal pressure of the discharging glove box 3 is reduced, the control unit controls the pressurization valve 1201 to be opened, the pressurization piston 1202 moves so as to introduce the gas in the pressurization tank 12 into the discharging glove box 3 to increase the internal pressure of the discharging glove box 3, then the pressurization valve 1201 is closed, the air inlet valve 16 is opened and the waste gas valve II 17 is closed at the same time, so that the waste gas in the main waste gas pipe 13 enters the pressurization tank 12 to prepare for the pressurization discharging glove box 3 after the next carbon nano tube is removed, when the waste gas in the booster tank 2 is collected sufficiently, the control unit adjusts the air inlet valve 16 to be closed and simultaneously opens the waste gas valve II 17, so that the waste gas flows to the waste gas treatment system from the main waste gas pipe 13; therefore, the internal pressure of the discharging glove box 3 is supplemented by waste gas, the environment in a stable system is facilitated, the disturbance of the internal gas atmosphere of the cracking furnace tube 7 is avoided while the carbon nano tubes are produced in a continuous circulation mode, and the constant quality of the produced products is guaranteed.

In this scheme, pay-off glove box 6 is connected with the feeding transition cabin 5 that is used for adding the catalyst, receives material glove box 2 to be connected with the device and initially put into carrier or unexpected the condition change carrier usefulness get thing transition cabin 1, feeding transition cabin 5 and the link of pay-off glove box 6 with get thing transition cabin 1 and receive the link of material glove box 2 and also be equipped with a door plant subassembly respectively.

The scheme takes methane as a carbon source gas and takes nickel oxide as a catalyst to prepare the carbon nano tube, and the specific implementation is as follows:

step one, replacing oxygen:

and opening the waste gas valve and a cabin door connected with the transition cabin 4, opening the air inlet valves of all the glove boxes, introducing oxygen of the nitrogen replacement system, closing the nitrogen inlet valves after the oxygen content of the system is less than 2%, and closing the air inlet valves and the waste gas valve of all the glove boxes and a door plate assembly connected with the transition cabin 4.

Step two, heating and feeding methane gas:

starting the cracking furnace 8, wherein the cracking furnace 8 is provided with a plurality of temperature areas along the length direction of the cracking furnace, the cracking furnace 8 is started to heat two temperature areas at two ends to be 810 ℃, after the middle temperature area is 790 ℃, a methane gas inlet valve is opened, and the flow of the methane gas inlet valve is adjusted to be 5m³And h, adjusting cooling water circulation sleeves at two ends of the cracking furnace tube 7 to control the internal temperature of the pre-activation section 701 to be 500-600 ℃, and simultaneously opening an adjusting waste gas valve to ensure that the system pressure is about 500 Pa.

Step three, catalyst pushing:

1400g of 6% nickel-based catalyst (with a carrier of SiO2 and nickel oxide of nickel) is taken and fed into a feeding glove box 6 through a feeding transition cabin 5, then the feeding transition cabin 5 is closed, the nickel oxide of the feeding glove box is respectively and equivalently (10g) filled into each carrier, the carriers are sequentially pushed into a furnace tube 7 at an interval of 5min, a small part of carbon-hydrogen bonds of methane gas are cracked into carbon atoms and hydrogen at the beginning at 790 ℃, the hydrogen reduces the nickel oxide in the catalyst into elemental metal nickel, the elemental metal nickel is used as crystal nucleus to catalyze and crack the carbon-hydrogen bonds of more hydrocarbons, the carbon atoms are deposited by using the nickel as the crystal nucleus to generate a carbon nano tube, and part of the hydrogen generated by cracking generates water after reducing the nickel oxide into the elemental nickel and is discharged as waste gas; another part of the hydrogen is discharged from the exhaust gas pipe after heating and reducing the catalyst in the preheating section. Wherein, the carbon-hydrogen bond in the cracking furnace tube 7 is cracked into carbon and hydrogen, and carbon atoms are continuously and uniformly loaded on the surface of the nickel-based catalyst to grow into the carbon nano tube.

Step four, circulating the carrier:

the carrier with the catalyst is intermittently pushed into the furnace tube, the carrier intermittently moves before pushing backwards, the carrier with the catalyst cracks and grows methane into carbon nano tubes to be gathered in the carrier, the carbon nano tubes intermittently enter the material receiving glove box 2, the carbon nano tubes in the material receiving glove box 2 can be removed from the carrier and bagged, the carrier is sent into the material feeding glove box 5 through the transfer transition cabin 4 and the material discharging glove box 3, the catalyst is quantitatively and again injected on the carrier, the intermittent pushing is circularly carried out and the cracking furnace tube 7 is sent into the cracking furnace tube, and the carrier is circularly as shown in figure 2.

Step five, removing the carbon nano tube carrier and bagging:

when the carbon nano tubes are bagged to a certain amount, the carbon nano tubes enter the discharging glove box 3 through the connecting transition cabin 4, a cabin door connected with the transition cabin 4 is closed, a quick opening valve is opened, and the bagged carbon nano tubes are sucked out at low pressure by the negative pressure material receiving cabin 10, so that the hollow fibrous carbon nano tubes are obtained as shown in fig. 3; and then, closing the quick-opening valve, opening the pressurization valve 1201, moving the pressurization piston 1202 to the end of the discharging glove box 3, finishing the pressure rise in the discharging glove box 3, then closing the pressurization valve 1201, opening the air inlet valve 16 and simultaneously closing the second exhaust valve 17, closing the air inlet valve 16 and simultaneously opening the second exhaust valve 17 after a period of time, and finishing the primary carbon nanotube removing system.

The foregoing is merely a preferred embodiment of the utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not intended to be exhaustive or to limit the utility model to other embodiments, and to various other combinations, modifications, and environments and may be modified within the scope of the inventive concept as described herein by the teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The device for preparing the carbon nano tube in a continuous cycle manner is characterized in that:

the device comprises two push generation units which are connected end to end in a sealing way, wherein carriers for containing catalysts are circulated in the two push generation units; the pushing generation unit is formed by sequentially and hermetically connecting a feeding glove box (6), a cracking furnace (8), a receiving glove box (2) and a discharging glove box (3);

and a negative pressure material receiving cabin (10) is arranged at the bottom of the discharging glove box (3).

2. The apparatus for manufacturing carbon nanotubes in continuous cycle according to claim 1, wherein: the negative pressure material receiving cabin (10) is communicated with the material receiving glove box (2) through a material suction channel (11), and a quick opening valve is arranged at the bottom of the material suction channel (11).

3. The apparatus for manufacturing carbon nanotubes in continuous cycle according to claim 1 or 2, wherein: 1-4 cracking furnace tubes (7) are arranged in the cracking furnace (8), the feed end of each cracking furnace tube (7) is communicated with the feeding glove box (6), and the discharge end of each cracking furnace tube (7) is communicated with the receiving glove box (2);

cracking furnace tube (7) feed end department is connected with the waste gas pipe, and discharge end department is connected with carbon source gas intake pipe, and carrier circulation direction and carbon source gas circulation opposite direction.

4. The apparatus for manufacturing carbon nanotubes in continuous cycle according to claim 3, wherein: the feeding glove box (6) is communicated with the discharging glove box (3), and the discharging glove box (3) is communicated with the receiving glove box (2) on the other side in a sealing way through a connecting transition cabin (4);

the feeding glove box (6) is connected with a feeding transition cabin (5), and the receiving glove box (2) is connected with a fetching transition cabin (1); the feeding transition cabin (5) and the feeding glove box (6) are connected, the fetching transition cabin (1) and the receiving glove box (2) are connected, and two door plate assemblies are arranged at two ends of the connecting transition cabin (4) respectively.

5. The apparatus for manufacturing carbon nanotubes in continuous cycle according to claim 4, wherein: one end of the cracking furnace tube (7) extends out of the cracking furnace (8) to form a pre-activation section (701), and the other end of the cracking furnace tube extends out of the cracking furnace (8) to form a removal section (702); and a cooling water circulation sleeve is respectively arranged outside the pre-activation section (701) and the removal section (702).

6. The apparatus for manufacturing carbon nanotubes in continuous cycle according to claim 5, wherein: the carbon source gas inlet pipe is connected to the total carbon source gas inlet pipe through the carbon source gas valve in a gathering mode, and the waste gas pipe is connected to the total waste gas pipe (13) through the waste gas valve in a gathering mode.

7. The apparatus for manufacturing carbon nanotubes in continuous cycle according to claim 6, wherein: the discharging glove box (3) is also communicated with a pressurizing tank (12) through a pressurizing pipeline, a pressurizing valve (1201) is arranged on the pressurizing pipeline, a pressurizing piston (1202) is arranged in the pressurizing tank (12), a feeding hole (1203) and a discharging hole (1204) are arranged at the bottom of the pressurizing tank (12), the feeding hole (1203) is communicated with a main waste gas pipe (13) through a waste gas branch pipe (15), and the discharging hole (1204) is communicated with the discharging glove box (3) through the pressurizing pipeline;

and an air inlet valve (16) is arranged on the waste gas branch pipe (15), a waste gas valve II (17) is arranged on the main waste gas pipe (13), and the waste gas valve II (17) is positioned at the downstream of a connecting port of the waste gas branch pipe (15) and the main waste gas pipe (13).

8. The apparatus for manufacturing carbon nanotubes in continuous cycle according to claim 7, wherein: the boosting piston (1202), the boosting valve (1201), the air inlet valve (16) and the waste gas valve II (17) are respectively and electrically connected with the control unit.

9. The apparatus for manufacturing carbon nanotubes in continuous cycle according to claim 5, 6, 7 or 8, wherein: the feeding glove box (6) is internally provided with 1-4 pushing platforms corresponding to the feeding port of the cracking furnace tube (7), and the receiving glove box (2) is internally provided with a carrier guide groove.