CN103787300B - The recoverying and utilizing method of tail gas in a kind of carbon nanotube batch production - Google Patents
The recoverying and utilizing method of tail gas in a kind of carbon nanotube batch production Download PDFInfo
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- CN103787300B CN103787300B CN201410010726.3A CN201410010726A CN103787300B CN 103787300 B CN103787300 B CN 103787300B CN 201410010726 A CN201410010726 A CN 201410010726A CN 103787300 B CN103787300 B CN 103787300B
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- gas
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- carbon nanotube
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- tail gas
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 39
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010923 batch production Methods 0.000 title claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 55
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011226 reinforced ceramic Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
A recoverying and utilizing method for tail gas in carbon nanotube batch production, its step: by preparing the tail gas of carbon nanotube generation, by condenser system, temperature is reduced to 25-35 DEG C; Cooled tail gas is inputted first gas-holder; By compressor, the tail gas in gas-holder is inputted gas separator with flow A, by gas separator, the invalid gas filtration in tail gas is drained with flow D; Gas after filtering through gas separator is inputted second gas-holder with flow B; Inputted in Reaktionsofen together with the unstripped gas preparing carbon nanotube using flow C by gas in second gas-holder and prepare carbon nanotube as raw material, unstripped gas inputs in Reaktionsofen with flow E.The value of flow A, flow B, flow C, flow D and flow E is closed and is: A-D=B=C-E; Pressure during gas-holder work is: 1.0-1.2 Mpa.The present invention can save the raw material of more than 60%, the dispersing property that can improve carbon nanotube and the pollution reduced air.
Description
Technical field
The present invention relates to carbon nano-tube material field, particularly relate to the method that in carbon nanotube batch production, tail gas recycle utilizes.
Background technology
Carbon nanotube is as monodimension nanometer material, and it is lightweight, and hexagonal structure connects perfect, has many abnormal mechanics, electricity and chemical property.Going deep in recent years along with carbon nanotube and nano materials research, its wide application prospect also constantly shows.Because carbon nanotube has the structure of hollow, minisize mould can be used as.The i.e. material such as filler metal, oxide compound therein, can prepare the wire etc. of the thinnest nanoscale, in the molectronics device in future or nanoelectronics device.Also can make plastics, carbon nano-tube reinforced ceramic matrix material, metal-base composites that carbon nanotube strengthens, the thinnest test tube and can " nano balance " that single atomic mass be weighed etc. can also be made.
At present, produce carbon nanotube in batches and use CVD(chemical vapour deposition) method.Namely, under the effect of the temperature of 600 ~ 1000 DEG C and catalyzer, carbonaceous gas raw material (as methane, ethene, propylene and benzene etc.) is made to decompose a kind of method preparing carbon nanotube.But utilizing CVD to produce in batches in carbon nanotube, the utilization ratio of carbon raw material gas only has about 30%, and due to a variety of causes, major part all directly enters air with the form of tail gas, does not collect recycling.Both raw material was wasted, again to the pollution that air creates.
How effectively collecting recycling batch production carbon nanotube and the tail gas that discharges, is industry problem demanding prompt solution.
Summary of the invention
The present invention, in order to solve the problems of the technologies described above, propose the recoverying and utilizing method of tail gas in a kind of simple and easy production of carbon nanotube easily, to improve the utilising efficiency of raw material, reduces tail gas to the pollution of air.
The recoverying and utilizing method of tail gas in a kind of carbon nanotube batch production that the present invention proposes, comprises following processing step:
Step 1: collect the tail gas prepared carbon nanotube and produce, and make its temperature be reduced to 25-35 DEG C by condenser system;
Step 2: cooled exhaust collection is input to first gas-holder;
Step 3: by a compressor, inputs a gas separator by the tail gas in gas-holder with flow A, the invalid gas filtration in tail gas is fallen, and drain with flow D by this gas separator;
Step 4: the gas after filtering out invalid gas through gas separator is input to second gas-holder with flow B;
Step 5: finally the gas in second gas-holder is inputted in Reaktionsofen together with the unstripped gas (total flux of these two kinds of gases is C) preparing carbon nanotube and prepare carbon nanotube as raw material, unstripped gas inputs in Reaktionsofen with flow E;
Wherein: the value of described flow A, flow B, flow C, flow D and flow E is closed and is:
A-D=B=C-E; Pressure during gas-holder work maintains: 1.0-1.2Mpa.
Compared with prior art, beneficial effect of the present invention:
1, the raw material of more than 60% can be saved, thus reduce the cost of carbon nanotube.
2, the dispersing property of carbon nanotube can be improved.
3, the pollution to air can be reduced.
Embodiment
The recoverying and utilizing method of tail gas in a kind of carbon nanotube batch production that present pre-ferred embodiments proposes, it adopts following processing step:
Step 1: make its temperature be reduced to 25-35 DEG C by condenser system in the tail gas preparing carbon nanotube generation, exhaust gas component mainly contains methane, carbon 2, carbon 3, hydrogen etc.
Step 2: cooled exhaust collection is inputted that first volume is 1000L, rated operating pressure is the gas-holder of 2.0Mpa.
Step 3: by a power of motor be 8KW, exhaust pressure is the compressor of 1.9Mpa, tail gas in gas-holder is inputted with flow A the gas separator that a volume is 15L, rated operating pressure is 20Mpa, by this gas separator by the invalid gas in tail gas, as hydrogen, filter out, and discharge with flow D.Described flow A is the flow of 10-15m/h.
Step 4: will filter out the gas after invalid gas through gas separator, inputs with flow B the gas-holder that second volume is 1000L, rated operating pressure is 2.0Mpa.Described flow B is 8-13m/h.
Step 5: finally the gas in second gas-holder is inputted in Reaktionsofen together with the unstripped gas (total flux of these two kinds of gases is C) preparing carbon nanotube and prepare carbon nanotube as raw material.Described flow C is 13-18m/h.Unstripped gas inputs in Reaktionsofen with flow E.
In removal process, the value of described flow A, flow B, flow C, flow D and flow E, should meet: the relation of A-D=B=C-E.In the present embodiment, flow A is 12.5m/h, and flow B is 10.5m/h, and flow C is 15.5m/h, calculates, flow D=flow A-flow B=2m/h according to above-mentioned relation formula; Flow E=flow C-flow B=5m/h.In like manner, in other embodiments, e.g., when flow A is 10m/h, flow B is 8m/h, when flow C is 13m/h, calculates flow D=2m/h; Flow E=5m/h.Or when flow A is 15m/h, flow B is 13m/h, when flow C is 18m/h, calculates flow D=2m/h; Flow E=5m/h.The pressure during work of gas-holder is so made to maintain normal scope a: 1.0-1.2Mpa.Otherwise pressure crosses the tolerance range that conference exceeds tank body, so that produce potential safety hazard; The too small meeting of pressure causes deficiency of air, the unstripped gas preparing carbon nanotube is reduced, thus reduces the output of carbon nanotube.
Adopt batch making carbon nanotube of the present invention, the raw material of more than 60% can be saved, thus reduce the cost of carbon nanotube.Tail gas after recovery, as a part of unstripped gas, has a certain amount of hydrogen in this part gas, adds a small amount of hydrogen in unstripped gas, when preparing carbon nanotube, the dispersing property of carbon nanotube can be made to improve.The performance of product promotes to some extent, and product with stable quality, respond well after on probation, now become a part for formal production technique.The pollution to air can also be reduced in addition.
Claims (4)
1. the recoverying and utilizing method of tail gas in carbon nanotube batch production, is characterized in that comprising following processing step:
Step 1: collect the tail gas prepared carbon nanotube and produce, and make its temperature be reduced to 25-35 DEG C by condenser system;
Step 2: cooled exhaust collection is inputted first gas-holder;
Step 3: by a compressor, inputs a gas separator by the tail gas in gas-holder with flow A, is fallen by the invalid gas-hydrogen filtration in tail gas, and drain with flow D by this gas separator;
Step 4: the gas after filtering out invalid gas through gas separator is inputted second gas-holder with flow B;
Step 5: finally the gas in second gas-holder is inputted in Reaktionsofen using flow C together with the unstripped gas preparing carbon nanotube and prepare carbon nanotube as raw material, unstripped gas inputs in Reaktionsofen with flow E;
Wherein: the value of described flow A, flow B, flow C, flow D and flow E is closed and is:
A
-d=B=C
-e
;the pressure during work of first and second gas-holder maintains: 1.0-1.2 MPa.
2. recoverying and utilizing method as claimed in claim 1, is characterized in that, the volume of first and second gas-holder described is 1000 L, rated operating pressure is 2.0 MPa.
3. recoverying and utilizing method as claimed in claim 1, is characterized in that, the power of motor of described compressor is 8 kW, exhaust pressure is 1.9 MPa.
4. recoverying and utilizing method as claimed in claim 1, is characterized in that, the volume of described gas separator is 15 L, rated operating pressure is 20 MPa.
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| CN201410010726.3A CN103787300B (en) | 2014-01-09 | 2014-01-09 | The recoverying and utilizing method of tail gas in a kind of carbon nanotube batch production |
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| CN103787300B true CN103787300B (en) | 2015-09-16 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1704511A (en) * | 2004-06-01 | 2005-12-07 | 安托林-工程集团股份有限公司 | Gas reusing system for carbon fibre manufacturing processes |
| CN1817791A (en) * | 2000-06-02 | 2006-08-16 | 俄克拉何马大学董事会 | Process and apparatus for producing single-walled carbon nanotubes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101049927B (en) * | 2007-04-18 | 2010-11-10 | 清华大学 | Method for producing Nano carbon tubes continuously and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1817791A (en) * | 2000-06-02 | 2006-08-16 | 俄克拉何马大学董事会 | Process and apparatus for producing single-walled carbon nanotubes |
| CN1704511A (en) * | 2004-06-01 | 2005-12-07 | 安托林-工程集团股份有限公司 | Gas reusing system for carbon fibre manufacturing processes |
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Address after: The rich industrial zone Longhua District Guanlan street 518000 Guangdong city in Shenzhen province Silicon Valley power building A3 building 1-2 Patentee after: Shenzhen three CIS nanometer new material Limited by Share Ltd. Address before: 518000 Guangdong city of Shenzhen province Baoan District Guanlan Street rich industrial zone Silicon Valley power building A3 building 1-2 Patentee before: SHENZHEN SSZK NEW MATERIALS CO.,LTD. |
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Address after: 518000 101 and 201, building A3, Silicon Valley Power Digital Industrial Park, No. 22, Dafu Industrial Zone, Dafu community, Guanlan street, Longhua District, Shenzhen, Guangdong Patentee after: Cabot high performance materials (Shenzhen) Co.,Ltd. Guo jiahuodiqu after: Zhong Guo Address before: 518000 1-2 / F, building A3, silicon valley power, Dafu Industrial Zone, Guanlan street, Longhua New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen three CIS nanometer new material Limited by Share Ltd. Guo jiahuodiqu before: Zhong Guo |
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