CN1329531C - Air current baking system and method of large size vacuum vessel - Google Patents
Air current baking system and method of large size vacuum vessel Download PDFInfo
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- CN1329531C CN1329531C CNB2005100414703A CN200510041470A CN1329531C CN 1329531 C CN1329531 C CN 1329531C CN B2005100414703 A CNB2005100414703 A CN B2005100414703A CN 200510041470 A CN200510041470 A CN 200510041470A CN 1329531 C CN1329531 C CN 1329531C
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- vacuum vessel
- large size
- air current
- pipeline
- size vacuum
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
Abstract
The present invention discloses an air current baking system and a method of a large size vacuum vessel. The present invention is characterized in that air current which is heated flows across an interlayer channel or a pipeline which is arranged at the container wall of a vacuum container; an air current inlet and an air current outlet of the interlayer channel or the pipeline are both arranged at the outer wall of the vacuum container, and the inner wall of the vacuum container is baked by a heat dissipating effect of air current. The present invention has the advantages of uniform heated structure and small temperature difference, can not generate big thermal stress, prevents breakage on the structure caused by the big thermal stress, prevents a baking system and an air current channel from oxidating at high temperature, and further increases the reliability of the baking system.
Description
Technical field
The invention belongs to the baking wall treatment process of vacuum chamber inwall.
Background technology
Large size vacuum vessel has been widely used in fields such as aerospace nuclear energy at present, particularly controlled magnetic confinement nuclear fusion device, it is that plasma body moves direct place, its vacuum must reach ultrahigh vacuum(HHV) (10-7Pa), could realize D-D (deuterium) and D-T (tritium) nuclear fusion reaction, produce high-temperature plasma.For similar large-scale ultra high vacuum container, must toast wall before operation handles, mainly because its stainless steel structure material all is to obtain by melting and casting, in smelting process, compounds such as hydrogen-oxygen carbon are dissolved in the material in various degree, perhaps in processing and making process, cause that owing to compact structure variation own other material osmosises are in the material body, like this when vacuumizing, the parsing of material surface gas and diffusive attenuation rate are very slow, directly influence the acquisition of container vacuum tightness.The method that baking is at present adopted is mainly heating method, by at some electrical heating wires of vacuum chamber surface arrangement, the heater strip temperature is heated to the 600-800 degree, then by radiation and conduction, the vacuum chamber heated baking to about the 200-250 degree.HL-2A tokamak device as Muscovite T-15 tokamak device and China, but the drawback of this and method is because the stainless steel thermal conductance is smaller, the temperature distribution of heating back wall of container is very inhomogeneous, the local temperature that particularly is furnished with electrical heating wire is very high, and it is very low to depart from the position temperature of heater strip, is easy to form big temperature head like this, make container produce excessive localized heat stress, safety of structure is damaged, and the easy oxidation of heater strip when high temperature simultaneously influences the life-span.
Summary of the invention
The method that the purpose of this invention is to provide a kind of baking wall processing of large size vacuum vessel, make that the vacuum vessel wall is heated evenly, and has a narrow range of temperature when vacuum vessel being toasted the wall processing, can not produce very big thermal stresses, can avoid not only that thermal stresses is excessive to damage structure; In addition, adopt nitrogen gas stream baking wall, can also avoid baking system and airflow path that oxidation at high temperature takes place, the progressive baking system reliability that increases.
Technical scheme of the present invention is as follows:
The air current baking system of large size vacuum vessel, it is characterized in that on the wall of vacuum vessel, being provided with sandwich passage or pipeline, the air-flow import and export of described sandwich passage or pipeline all is arranged on the vacuum vessel outer wall, toasts the inwall of vacuum vessel by the cooling effect of air-flow in passage or the pipeline.
The air current baking method of large size vacuum vessel, it is characterized in that allowing through heated air stream flow through sandwich passage or pipeline on the wall that is arranged on vacuum vessel, the air-flow import and export of described sandwich passage or pipeline all is arranged on the vacuum vessel outer wall, toasts the inwall of vacuum vessel by the cooling effect of air-flow.
Described baking method is characterized in that vacuum vessel is the large size vacuum vessel that tokamak device is used to produce high-temperature plasma, and described air-flow is for flowing through heated nitrogen, and the temperature of the nitrogen gas stream when entering vacuum vessel is 290～305 degree.
Described baking method, it is characterized in that nitrogen gas stream at first comes out from the nitrogen storage jar,, heat up through interchanger and well heater then through compression blower fan, sourdine and strainer, nitrogen flow temperature is elevated to 300 degree, enters the sandwich passage or the pipeline of large size vacuum vessel at last; Air-flow is after the circulation of vacuum vessel sandwich passage or pipeline, and the nitrogen gas stream of coming out continues to get back to interchanger and carries out the heat exchange cooling, goes into blower fan, the circulation of beginning new round nitrogen gas stream through the supercooler cooling is laggard again; For guaranteeing that blower fan normally moves, between sourdine and strainer, arrange bypass of gas flow simultaneously, make can enter this bypass of gas flow as required through the nitrogen gas stream after the interchanger cooling.
The inventive method successfully has been used in country " 95 " major scientific projects---on the EAST superconducting tokamak, its advantage is exactly that structure is heated evenly, have a narrow range of temperature, can not produce very big thermal stresses, can avoid not only that thermal stresses is excessive to damage structure, but also can avoid baking system and airflow path that oxidation at high temperature takes place, and further increase the baking system reliability, produced good effect.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention.
Fig. 2 is an airflow line structure principle chart in the large size vacuum vessel of the present invention.
Embodiment
System flow is as follows:
1. nitrogen gas stream is at first come out from the nitrogen storage jar, through compression blower fan, sourdine and strainer, be elevated to 140 degree through heat exchange temperature then, pass through heater heats again, gas flow temperature is elevated to 300 degree, (sandwich passage is meant in wall to enter sandwich passage on the wall of large size vacuum vessel or pipeline at last, pipeline is meant and is installed in the wall surface, sandwich passage or pipeline have the inlet, outlet head piece all to be arranged on the outer wall of vacuum vessel), nitrogen flow temperature can be controlled by regulating heater voltage.
2. nitrogen gas stream is after vacuum vessel interlayer or pipeline circulation, and the gas flow temperature of coming out is 250 degree, gets back to interchanger and carries out heat exchange, temperature drops to 190 degree from 250 degree, again through the recooler cooling, drops to 40 degree, enter blower fan then, the circulation of beginning next round nitrogen gas stream.Too high for the nitrogen flow temperature of avoiding entering blower fan, guarantee that blower fan normally moves, between sourdine and strainer, arrange bypass of gas flow simultaneously, make the nitrogen gas stream of getting back to after the interchanger cooling can enter this bypass of gas flow as required.
Claims (2)
1, the air current baking method of large size vacuum vessel, it is characterized in that it being that nitrogen gas stream is at first come out from the nitrogen storage jar, through compression blower fan, sourdine and strainer, heat up through interchanger and well heater then, nitrogen flow temperature is elevated to the 290-305 degree, enters sandwich passage or pipeline on the large size vacuum vessel wall; Air-flow is after the circulation of vacuum vessel sandwich passage or pipeline, and the nitrogen gas stream of coming out continues to get back to interchanger and carries out the heat exchange cooling, goes into blower fan, the circulation of beginning new round nitrogen gas stream through the supercooler cooling is laggard again; For guaranteeing that blower fan normally moves, between sourdine and strainer, arrange bypass of gas flow simultaneously, make can enter this bypass of gas flow as required through the nitrogen gas stream after the interchanger cooling.
2, the air current baking method of large size vacuum vessel according to claim 1, it is characterized in that large size vacuum vessel is the large size vacuum vessel that tokamak device is used to produce high-temperature plasma, the nitrogen flow temperature that enters large size vacuum vessel is 300 degree, and the air-flow import and export of described sandwich passage or pipeline all is arranged on the vacuum vessel outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100414703A CN1329531C (en) | 2005-08-09 | 2005-08-09 | Air current baking system and method of large size vacuum vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100414703A CN1329531C (en) | 2005-08-09 | 2005-08-09 | Air current baking system and method of large size vacuum vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1737167A CN1737167A (en) | 2006-02-22 |
| CN1329531C true CN1329531C (en) | 2007-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100414703A Expired - Fee Related CN1329531C (en) | 2005-08-09 | 2005-08-09 | Air current baking system and method of large size vacuum vessel |
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| CN (1) | CN1329531C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621334B (en) * | 2016-07-15 | 2019-09-17 | 核工业西南物理研究院 | For hot helium leak test gas heating circulation system and quickly heat cooling means |
| CN107746928B (en) * | 2017-11-21 | 2024-04-12 | 上海信鹏印刷器材有限公司 | Continuous tempering device and method for die-cutting knife steel belt |
| CN109654868A (en) * | 2018-10-16 | 2019-04-19 | 中国科学院合肥物质科学研究院 | A kind of baking system based on Superconducting tokamak device |
| CN109599191A (en) * | 2018-10-16 | 2019-04-09 | 中国科学院合肥物质科学研究院 | A kind of cooling loop system based on Superconducting tokamak device |
| CN109595879A (en) * | 2018-10-16 | 2019-04-09 | 中国科学院合肥物质科学研究院 | A kind of vacuum bakeout device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2080661C1 (en) * | 1994-05-10 | 1997-05-27 | Государственное предприятие "Ленинградский Северный завод" | Spherical tokamak vacuum chamber and its manufacturing process |
| US6052424A (en) * | 1997-03-18 | 2000-04-18 | Japan Atomic Energy Research Institute | Method of welding for fabricating double-wall structures |
-
2005
- 2005-08-09 CN CNB2005100414703A patent/CN1329531C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2080661C1 (en) * | 1994-05-10 | 1997-05-27 | Государственное предприятие "Ленинградский Северный завод" | Spherical tokamak vacuum chamber and its manufacturing process |
| US6052424A (en) * | 1997-03-18 | 2000-04-18 | Japan Atomic Energy Research Institute | Method of welding for fabricating double-wall structures |
Non-Patent Citations (1)
| Title |
|---|
| "HT-7U超导托卡马克装置真空室热烘烤结构数值模拟与分析" 宋云涛，"核动力工程"，第25卷第4期 2004 * |
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| CN1737167A (en) | 2006-02-22 |
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