CN220366689U - Cracking tube furnace for preparing carbon nano tube by preheating - Google Patents
Cracking tube furnace for preparing carbon nano tube by preheating Download PDFInfo
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- CN220366689U CN220366689U CN202322069090.7U CN202322069090U CN220366689U CN 220366689 U CN220366689 U CN 220366689U CN 202322069090 U CN202322069090 U CN 202322069090U CN 220366689 U CN220366689 U CN 220366689U
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- electric heating
- preparing carbon
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 29
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 29
- 238000005336 cracking Methods 0.000 title claims abstract description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000005485 electric heating Methods 0.000 claims abstract description 36
- 239000003345 natural gas Substances 0.000 claims abstract description 34
- 238000004321 preservation Methods 0.000 claims abstract description 33
- 238000009413 insulation Methods 0.000 claims abstract description 25
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 229920000742 Cotton Polymers 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 5
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910052863 mullite Inorganic materials 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 19
- 230000009970 fire resistant effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Carbon And Carbon Compounds (AREA)
Abstract
The utility model belongs to the technical field of nano material technology preparation equipment, and provides a preheating type cracking tube furnace for preparing carbon nano tubes. The utility model relates to a cracking tube furnace for preparing carbon nanotubes by preheating, which comprises the following steps: the electric heating tube furnace comprises a furnace body; the heat preservation part is arranged in the furnace body of the electric heating tube furnace; the heat preservation part comprises a refractory heat insulation plate and a heat preservation layer; the fireproof heat insulation plate is arranged in the furnace body and is mounted on the inner wall of the furnace body in a coating manner; the heat preservation layer is arranged between the fireproof heat insulation plate and the furnace body; the silicon carbide rods are arranged at a plurality of positions and are arranged in the inner cavity of the furnace body; the natural gas preheating pipe is arranged in the heat preservation layer at least at one position; and the electric control disc is arranged below the electric heating tube furnace. The utility model provides a cracking tube furnace for preparing carbon nanotubes by preheating, which is used for reducing the energy consumption of equipment.
Description
Technical Field
The utility model relates to the technical field of nano material preparation equipment, in particular to a preheating type cracking tube furnace for preparing carbon nano tubes.
Background
The carbon nano tube is produced by taking natural gas as a raw material, and currently, an 8-tube cracking tube furnace is generally adopted for production, wherein 4 tubes are arranged in parallel, the natural gas enters the tube furnace for cracking at normal temperature, and carbon atoms are orderly and tubular attached on the surface of a catalyst to produce the carbon nano tube.
The existing natural gas cracking tube furnace adopts two independent cracking tube furnaces to be arranged in parallel, so that the heat dissipation area of the furnace body is larger, and the energy consumption of the equipment is high; meanwhile, the natural gas enters a tube furnace at normal temperature for cracking, and the natural gas unit consumption of the carbon nanotube product is high;
therefore, a device capable of carrying out natural gas preheating treatment is provided, and the energy consumption of equipment is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a preheating type cracking tube furnace for preparing carbon nanotubes, so as to reduce the energy consumption of equipment.
A cracking tube furnace for preparing carbon nanotubes by preheating, an electric heating tube furnace, wherein the electric heating tube furnace comprises a furnace body; the heat preservation part is arranged in the furnace body of the electric heating tube furnace; the heat preservation part comprises a refractory heat insulation plate and a heat preservation layer; the fireproof heat insulation plate is arranged in the furnace body and is mounted on the inner wall of the furnace body in a coating manner; the heat preservation layer is arranged between the fireproof heat insulation plate and the furnace body; the silicon carbide rods are arranged at a plurality of positions and are arranged in the inner cavity of the furnace body; the natural gas preheating pipe is arranged in the heat preservation layer at least at one position; and the electric control disc is arranged below the electric heating tube furnace.
Further, the device also comprises a glove box, wherein the glove box is provided with two parts, is respectively positioned at two ends of the electric heating tube furnace and is communicated with the electric heating tube furnace. In practical operation, the glove box is the same as the traditional design, and the purpose is to realize the sealing of the electric heating tube furnace.
Further, the heat preservation layer comprises heat preservation cotton, the heat preservation cotton is installed on the fire-resistant heat insulation board, and the heat preservation cotton is located on the fire-resistant heat insulation board.
Further, the fireproof heat insulation plate is a mullite heat insulation plate; the heat-insulating cotton is glass cotton. In the actual design, the materials adopted in the design not only can realize heat preservation and heat insulation; the materials are convenient to purchase, easy to obtain and low in price, and are suitable for the working condition requirements in the device.
Further, the appearance of the silicon carbide rod is U-shaped. In practical application, the design can effectively improve the size of the silicon carbide rod in the electric heating tube furnace and prolong the service time.
Further, the natural gas preheating pipes are arranged in the two sides of the furnace body, 4 heat-resistant stainless steel pipes with the pipe diameter of 32 mm are respectively arranged, and are positioned between the heat preservation cotton and the fire-resistant heat insulation plate and are abutted against the fire-resistant heat insulation plate. In actual work, the design effectively improves the preheating range of natural gas and facilitates the natural gas to raise the temperature.
Further, the device also comprises a connecting pipe, wherein the connecting pipe is arranged between the electric heating tube furnace and the glove box, 8 stainless steel cracking tubes with the tube diameters of 219 mm are arranged in the connecting pipe, and two ends of the connecting pipe are respectively connected with the electric heating tube furnace and the glove box in a sealing way. In practical application, the design is the same as the traditional design, so that repeated design is avoided, and cost is saved.
Furthermore, the connecting pipes are arranged on any end face of the electric heating tube furnace and are all arranged on eight connecting pipes. In practical application, the design improves the generation efficiency of the electric heating tube furnace. Lifting from 4-pipe-one furnace to 8-pipe-one furnace.
According to the technical scheme, the preheating type cracking tube furnace for preparing the carbon nano tube has the beneficial effects that:
in actual work, the device changes the traditional two furnaces into an integral furnace, so that the energy loss is reduced, and the energy utilization is more concentrated; the energy consumption loss is smaller; meanwhile, a natural gas preheating pipe is added in the heat-insulating layer of the furnace body. The natural gas preheating pipe is added to preheat natural gas, so that the productivity of the preheated natural gas is improved, and the energy consumption can be effectively reduced. The preheating of the natural gas preheating pipe is realized through the temperature in the furnace; in the practical test, the improved integrated furnace reduces the heat dissipation area by about 30 square meters, and saves the energy consumption by about 32%; meanwhile, the high-temperature waste heat between the outer side of the furnace body fireproof insulation board and the inner side of the heat preservation layer is utilized to preheat normal-temperature natural gas to 300 ℃, and then the natural gas is introduced into a tube furnace for cracking to produce carbon nano tubes, and the natural gas consumption is about 1000 standard square per ton of carbon nano tubes. Therefore, the method is suitable for industrial popularization.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, the drawings that are used in the description of the embodiments or the prior art will be briefly described below. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
Fig. 1 is a schematic front view illustrating installation of a pyrolysis tube furnace and a glove box for preparing carbon nanotubes by preheating according to an embodiment of the present utility model;
fig. 2 is a schematic diagram illustrating the left-hand internal structure of a pyrolysis tube furnace for preparing carbon nanotubes according to an embodiment of the present utility model.
Reference numerals:
the electric heating tube furnace comprises an electric heating tube furnace 1, a furnace body 11, a heat preservation part 2, a refractory heat insulation plate 21, a heat preservation layer 22, heat preservation cotton 221, a silicon carbide rod 3, a natural gas preheating tube 4, a glove box 5, a connecting tube 6 and an electric control disc 7.
Detailed Description
Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.
An embodiment is substantially as shown in figures 1 to 2 of the accompanying drawings:
as shown in fig. 1-2, the preheating type cracking tube furnace for preparing carbon nanotubes provided in this embodiment reduces energy consumption of equipment.
A cracking tube furnace for preparing carbon nanotubes by preheating, an electric heating tube furnace 1, wherein the electric heating tube furnace 1 comprises a furnace body 11; a heat preservation part 2, wherein the heat preservation part 2 is arranged in a furnace body 11 of the electric heating tube furnace 1; the heat preservation part 2 comprises a fireproof heat insulation plate 21 and a heat preservation layer 22; the fireproof heat insulation plate 21 is arranged in the furnace body 11 and is mounted on the inner wall of the furnace body 11 in a coating manner; the heat preservation layer 22 is arranged between the fireproof heat insulation plate 21 and the furnace body 11; the silicon carbide rods 3 are arranged at a plurality of positions, and are arranged in the inner cavity of the furnace body 11; a natural gas preheating pipe 4, wherein at least one place of the natural gas preheating pipe 4 is arranged in the heat preservation layer 22; and the electric control plate 7 is arranged below the electric heating tube furnace 1. In actual work, the device changes the traditional two furnaces into an integral furnace, so that the energy loss is reduced, and the energy utilization is more concentrated; the energy consumption loss is smaller; meanwhile, a natural gas preheating pipe 4 is added in the heat preservation layer 22 of the furnace body 11. The natural gas preheating pipe 4 is added to preheat natural gas, so that the productivity of the preheated natural gas is improved, and the energy consumption can be effectively reduced. The natural gas preheating pipe 4 is preheated by the temperature in the furnace; in the practical test, the improved integrated furnace reduces the heat dissipation area by about 30 square meters, and saves the energy consumption by about 32%; meanwhile, the normal-temperature natural gas is preheated to 300 ℃ by utilizing the high-temperature waste heat between the outer side of the fireproof insulation board 21 and the inner side of the insulation layer 22 of the furnace body 11 and then is introduced into a tube furnace for cracking to produce the carbon nano tube, and the natural gas consumption is about 1000 standard square per ton of carbon nano tube. Therefore, the method is suitable for industrial popularization.
In this embodiment, the apparatus further includes a glove box 5, where the glove box 5 is provided with two places, and is respectively located at two ends of the electric heating tube furnace 1, and is in communication with the electric heating tube furnace 1. In practice, the glove box 5 is of the same design as the conventional one, with the aim of achieving the above-mentioned sealing of the electrically heated tube furnace 1.
In this embodiment, the insulating layer 22 includes insulating cotton 221, the insulating cotton 221 is mounted on the fire-resistant insulating board 21, and the insulating cotton 221 is located on the fire-resistant insulating board 21.
In this embodiment, the refractory and heat insulating plate 21 is a mullite heat insulating plate; the heat insulation cotton 221 is glass cotton. In the actual design, the materials adopted in the design not only can realize heat preservation and heat insulation; the materials are convenient to purchase, easy to obtain and low in price, and are suitable for the working condition requirements in the device.
In this embodiment, the profile of the silicon carbide rod 3 is U-shaped. In practical application, the design can effectively improve the size of the silicon carbide rod 3 in the electric heating tube furnace 1 and prolong the service time.
In this embodiment, the natural gas preheating pipes 4 are disposed in both sides of the furnace body 11, and 4 heat-resistant stainless steel pipes with a pipe diameter of 32 mm are respectively disposed between the heat-insulating cotton 221 and the fire-resistant heat-insulating board 21 and abutted against the fire-resistant heat-insulating board 21. In actual work, the design effectively improves the preheating range of natural gas and facilitates the natural gas to raise the temperature.
In this embodiment, the heating furnace further comprises a connecting pipe 6, the connecting pipe 6 is arranged between the electric heating tube furnace 1 and the glove box 5, 8 stainless steel cracking tubes with the diameter of 219 mm are arranged in the connecting pipe, and two ends of the connecting pipe 6 are respectively in sealing connection with the electric heating tube furnace 1 and the glove box 5. In practical application, the design is the same as the traditional design, so that repeated design is avoided, and cost is saved.
In this embodiment, the connection pipes 6 are provided on eight connection pipes 6 on any one end face of the electric heating tube furnace 1. In practical use, the design improves the production efficiency of the electric heating tube furnace 1. Lifting from 4-pipe-one furnace to 8-pipe-one furnace.
In summary, the preheating type cracking tube furnace for preparing the carbon nanotubes has the advantages of reasonable design, simple operation, energy conservation and energy consumption reduction; and the preheating treatment of the natural gas is effectively realized by utilizing the temperature in the tube furnace, so that the yield is somewhat improved. Therefore, the device is suitable for industrial popularization.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (8)
1. A cracking tube furnace for preparing carbon nanotubes by preheating, comprising:
the electric heating tube furnace comprises a furnace body;
the heat preservation part is arranged in the furnace body of the electric heating tube furnace; the heat preservation part comprises a refractory heat insulation plate and a heat preservation layer; the fireproof heat insulation plate is arranged in the furnace body and is mounted on the inner wall of the furnace body in a coating manner; the heat preservation layer is arranged between the fireproof heat insulation plate and the furnace body;
the silicon carbide rods are arranged at a plurality of positions and are arranged in the inner cavity of the furnace body;
the natural gas preheating pipe is arranged in the heat preservation layer at least at one position; and
The electric control plate is arranged below the electric heating tube furnace.
2. The cracking tube furnace for preparing carbon nanotubes according to claim 1, further comprising a glove box, wherein the glove box is provided with two parts, is respectively positioned at two ends of the electric heating tube furnace, and is communicated with the electric heating tube furnace.
3. The cracking tube furnace for preparing carbon nanotubes of claim 1, wherein said insulating layer comprises insulating cotton, said insulating cotton is mounted on said refractory insulating board, said insulating cotton is located on said refractory insulating board.
4. A cracking tube furnace for preparing carbon nanotubes according to claim 3, wherein the refractory and heat insulating plate is a mullite heat insulating plate; the heat-insulating cotton is glass cotton.
5. The cracking tube furnace for preparing carbon nanotubes of claim 1, wherein said silicon carbide rod has a U-shape.
6. The cracking tube furnace for preparing carbon nanotubes of claim 1, wherein said natural gas preheating tubes are disposed in both sides of said furnace body, between the insulating cotton and the refractory insulating board, and in close proximity to the refractory insulating board.
7. The cracking tube furnace for preparing carbon nanotubes of claim 2, further comprising a connecting tube, wherein the connecting tube is arranged between the electric heating tube furnace and the glove box, and two ends of the connecting tube are respectively connected with the electric heating tube furnace and the glove box in a sealing manner.
8. The cracking tube furnace for preparing carbon nanotubes of claim 7, wherein said connecting tubes are arranged on any end face of said electric heating tube furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322069090.7U CN220366689U (en) | 2023-08-01 | 2023-08-01 | Cracking tube furnace for preparing carbon nano tube by preheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322069090.7U CN220366689U (en) | 2023-08-01 | 2023-08-01 | Cracking tube furnace for preparing carbon nano tube by preheating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220366689U true CN220366689U (en) | 2024-01-19 |
Family
ID=89519644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322069090.7U Active CN220366689U (en) | 2023-08-01 | 2023-08-01 | Cracking tube furnace for preparing carbon nano tube by preheating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220366689U (en) |
-
2023
- 2023-08-01 CN CN202322069090.7U patent/CN220366689U/en active Active
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