CN114623323A - Thermal barrier coating heat insulation structure for heat preservation of hot gas conduit - Google Patents
Thermal barrier coating heat insulation structure for heat preservation of hot gas conduit Download PDFInfo
- Publication number
- CN114623323A CN114623323A CN202210339793.4A CN202210339793A CN114623323A CN 114623323 A CN114623323 A CN 114623323A CN 202210339793 A CN202210339793 A CN 202210339793A CN 114623323 A CN114623323 A CN 114623323A
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- China
- Prior art keywords
- barrier coating
- thermal barrier
- heat
- outer sleeve
- hot gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012720 thermal barrier coating Substances 0.000 title claims abstract description 63
- 238000009413 insulation Methods 0.000 title claims abstract description 57
- 238000004321 preservation Methods 0.000 title claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 30
- 239000010410 layer Substances 0.000 description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a thermal barrier coating heat insulation structure for heat preservation of a hot gas conduit, which comprises a segmented conical vacuum tube, a circular outer sleeve and the like; a segmented conical vacuum tube is arranged between each segment of the inner tube section and the circular outer sleeve, a thermal barrier coating is arranged on the outer surface of the segmented conical vacuum tube, a fiber thermal insulation layer is arranged on the thermal barrier coating to adjust the gap between the thermal barrier coating, the fiber thermal insulation layer and the inner wall of the outer sleeve, one end of the segmented conical vacuum tube is welded with the outer side of the inner tube section, the other end of the segmented conical vacuum tube is welded with the inner side of the circular outer sleeve, so that each segment of the inner tube section is firmly connected with the circular outer sleeve, and a closed cavity is formed between the inner tube section and the circular outer sleeve. The heat-preservation and heat-insulation structure applied to the hot gas conduit provided by the invention has the heat-preservation and heat-insulation effects through three composite heat-insulation structures, namely the vacuum tube, the thermal barrier coating and the fiber heat-insulation layer, so that the heat loss caused by heat convection during long-distance transportation of hot gas can be effectively reduced, and meanwhile, the weight of the heat-preservation and heat-insulation layer is effectively reduced.
Description
Technical Field
The invention relates to a thermal barrier coating heat insulation structure for heat preservation of a hot gas conduit, and belongs to the technical field of nuclear equipment.
Background
Helium is adopted as a primary loop coolant of the high-temperature gas cooled reactor/ultra-high-temperature gas cooled reactor nuclear power generating unit, heat generated by fuel balls in the reactor is carried out of a reactor pressure vessel through the helium, and a heat insulation layer of a hot gas guide pipe needs to be specially designed in order to ensure that the heat of the high-temperature helium is less lost. Particularly for developing the ultra-high temperature gas cooled reactor nuclear power technology, the comprehensive utilization of nuclear energy is mainly aimed, namely, the nuclear energy is utilized to realize cogeneration, the nuclear energy is combined with industries such as hydrogen production and steel smelting, and the carbon emission reduction and the green development are realized.
At present, the structural design concept of the hot gas guide pipe of the ultra-high temperature gas cooled reactor is also based on the sleeve structure of the high temperature gas cooled reactor. Considering that the design temperature of the outlet of the ultra-high temperature gas cooled reactor is higher than the outlet temperature of the ultra-high temperature gas cooled reactor by 200-300 ℃, and the temperature reaches 950 ℃ or more than 1000 ℃; meanwhile, considering that the coupling of the nuclear reactor and the hydrogen production facility needs to consider a plurality of safety problems and requires the nuclear reactor and the hydrogen production facility to be fully isolated, the conveying distance of high-temperature hot gas must be increased so as to eliminate the damage to reaction pairs caused by explosion and chemical leakage which may occur in the hydrogen production plant, and the hydrogen production plant is also ensured to be a non-nuclear system with low radioactivity enough. However, the long-distance transportation of high-temperature hot gas is undoubtedly a serious test for the material of the hot gas conduit and the structural design of the thermal insulation layer.
Disclosure of Invention
The invention aims to provide a thermal barrier coating thermal insulation structure for thermal insulation of a hot gas guide pipe, which is used for solving the problems of long-distance transportation of high-temperature hot gas of an ultrahigh-temperature gas cooled reactor, comprehensive utilization of nuclear heat and safety of nuclear hydrogen equipment.
The invention is realized by adopting the following technical scheme:
a thermal barrier coating thermal insulation structure for heat preservation of a hot gas conduit comprises a segmented inner pipe joint, a segmented conical vacuum pipe, a thermal barrier coating, a fiber thermal insulation layer and a circular outer sleeve from inside to outside;
the device comprises a circular outer sleeve, a segmented conical vacuum tube, a thermal barrier coating, a fiber thermal insulation layer and a circular outer sleeve, wherein a segmented conical vacuum tube is arranged between each segment of inner tube section and the circular outer sleeve, the outer surface of the segmented conical vacuum tube is provided with the thermal barrier coating, the thermal barrier coating is provided with the fiber thermal insulation layer to adjust the gap between the thermal barrier coating, the fiber thermal insulation layer and the inner wall of the outer sleeve, one end of the segmented conical vacuum tube is welded with the outer side of the inner tube section, the other end of the segmented conical vacuum tube is welded with the inner side of the circular outer sleeve, so that each segment of inner tube section is firmly connected with the circular outer sleeve, and a closed cavity is formed between the inner tube section and the circular outer sleeve.
The invention is further improved in that a free expansion gap is arranged between the inner pipe joint and the circular outer sleeve.
The invention further improves that the thermal barrier coating is formed outside the segmented conical vacuum tube by a spraying method.
In a further development of the invention, the total thickness of the thermal barrier coating does not exceed 0.5 mm.
The invention is further improved in that the fiber heat insulation layer outside the thermal barrier coating is adjusted to have a clearance range of-0.05-0 mm with the inner wall of the circular outer sleeve.
The invention further improves that the thermal barrier coating adopts ZrO2A thermal barrier coating.
The invention further improves that the thermal barrier coating adopts MCrAlY/YSZ thermal barrier coating.
The invention further improves that the thermal barrier coating adopts MCrAlY/YSZ gradient thermal barrier coating.
The invention is further improved in that the segmented conical vacuum tube is formed by connecting a round tube and a conical tube.
The invention has at least the following beneficial technical effects:
compared with the existing heat-insulating structure of the hot gas guide pipe, the thermal barrier coating and thermal insulation structure for heat insulation of the hot gas guide pipe utilizes a composite heat-insulating method of three structures of vacuum, thermal barrier coating and thermal insulation fiber, effectively reduces the weight of the heat-insulating layer while effectively reducing the heat loss caused by thermal convection when hot gas is conveyed for a long distance, improves the comprehensive utilization of the thermal energy of a nuclear reactor, and ensures the effective isolation of nuclear facilities and hydrogen production equipment, thereby ensuring the safety of the equipment.
Drawings
FIG. 1 is a schematic view of a thermal barrier coating insulation structure for thermal insulation of a hot gas duct according to the present invention.
Fig. 2 is an exploded view of the present invention.
Description of reference numerals:
1-inner pipe section;
2-segmented conical vacuum tube;
3-a thermal barrier coating;
4-fibrous insulation layer;
5-circular outer sleeve.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in FIG. 1, the thermal barrier coating thermal insulation structure for thermal insulation of a hot gas conduit provided by the invention comprises a segmented inner pipe section 1, a segmented conical vacuum pipe 2, a thermal barrier coating 3, a fiber thermal insulation layer 4 and a circular outer sleeve 5 from inside to outside.
Because the temperature of the reactor outlet of the ultra-high temperature gas cooled reactor is increased, the hot gas guide pipe of the ultra-high temperature gas cooled reactor also adopts a segmented structure, and a gap is arranged between the two ends, so that the high-temperature inner pipe joint 1 can freely expand in the axial direction.
A segmented conical vacuum tube 2, a thermal barrier coating 3 and a fiber thermal insulation layer 4 are arranged between each segment of the inner tube section 1 and the circular outer tube, one end of the segmented conical vacuum tube 2 is welded with the outer side of the inner tube section 1, the other end of the segmented conical vacuum tube is welded with the inner side of the circular outer tube 5, so that each segment of the inner tube section 1 is firmly connected with the circular outer tube 5, and a closed cavity is formed between the inner tube section 1 and the circular outer tube 5.
The total thickness of the thermal barrier coating does not exceed 0.5mm, otherwise not only the total weight of the whole structure is increased, but also the thicker the coating thickness is, the cracking and debonding defects are easy to occur.
The fiber heat insulation layer outside the thermal barrier coating is adjusted to have a clearance range of-0.05-0 mm with the inner wall of the circular outer sleeve, and the thermal barrier coating is of a rigid structure and is not easy to form close contact with the surface of the inner wall of the outer sleeve.
Example 1:
spraying a single-layer thermal barrier coating, e.g. ZrO, on the outer wall of a segmented conical vacuum tube2The thermal barrier coating forms a composite heat-preservation and heat-insulation structure, so that the hot gas conduit realizes the heat-preservation and heat-insulation functions.
Example 2:
and spraying a metal/ceramic double-layer thermal barrier coating, such as an MCrAlY/YSZ thermal barrier coating, on the outer wall of the segmented conical vacuum tube to form a composite thermal insulation structure, so that the hot gas conduit realizes the thermal insulation function.
Example 3:
and spraying a metal/ceramic gradient thermal barrier coating, such as an MCrAlY/YSZ gradient thermal barrier coating, on the outer wall of the segmented conical vacuum tube to form a composite heat-insulating structure, so that the hot gas conduit realizes the heat-insulating function.
The composite heat-preservation and heat-insulation structure of the hot gas conduit can also be applied to other similar heat energy transmission occasions, such as a steam transmission system of ultra-supercritical thermal power generation, and can improve the heat energy transmission efficiency and ensure the safety of equipment.
Although the invention has been described in detail with respect to the general description and the specific embodiments thereof, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A thermal barrier coating heat insulation structure for heat preservation of a hot gas conduit is characterized by comprising a segmented inner pipe section, a segmented conical vacuum pipe, a thermal barrier coating, a fiber heat insulation layer and a circular outer sleeve from inside to outside;
the device comprises a circular outer sleeve, a segmented conical vacuum tube, a thermal barrier coating, a fiber thermal insulation layer and a circular outer sleeve, wherein a segmented conical vacuum tube is arranged between each segment of inner tube section and the circular outer sleeve, the outer surface of the segmented conical vacuum tube is provided with the thermal barrier coating, the thermal barrier coating is provided with the fiber thermal insulation layer to adjust the gap between the thermal barrier coating, the fiber thermal insulation layer and the inner wall of the outer sleeve, one end of the segmented conical vacuum tube is welded with the outer side of the inner tube section, the other end of the segmented conical vacuum tube is welded with the inner side of the circular outer sleeve, so that each segment of inner tube section is firmly connected with the circular outer sleeve, and a closed cavity is formed between the inner tube section and the circular outer sleeve.
2. The thermal barrier coating insulation structure for hot gas duct insulation of claim 1, wherein a free expansion gap is provided between the inner pipe section and the circular outer sleeve.
3. The thermal barrier coating insulation structure for thermal insulation of a hot gas conduit according to claim 1, wherein the thermal barrier coating is formed outside the segmented conical vacuum tube by a spray coating method.
4. The thermal barrier coating insulation structure for thermal insulation of a hot gas conduit according to claim 1, wherein the total thickness of the thermal barrier coating is not more than 0.5 mm.
5. The thermal barrier coating insulation structure for heat preservation of a hot gas conduit according to claim 1, wherein the fibrous thermal insulation layer outside the thermal barrier coating is adjusted to have a gap with the inner wall of the circular outer sleeve ranging from-0.05 mm to 0 mm.
6. The thermal barrier coating insulation structure for thermal insulation of a hot gas conduit according to claim 1, wherein the thermal barrier coating is ZrO2A thermal barrier coating.
7. The thermal barrier coating insulation structure for thermal insulation of a hot gas conduit according to claim 1, wherein the thermal barrier coating is an MCrAlY/YSZ thermal barrier coating.
8. The thermal barrier coating insulation structure for thermal insulation of a hot gas conduit according to claim 1, wherein the thermal barrier coating employs an MCrAlY/YSZ gradient thermal barrier coating.
9. The thermal barrier coating insulation structure for hot gas duct according to claim 1, wherein the segmented conical vacuum tube is formed by joining a circular tube and a conical tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339793.4A CN114623323A (en) | 2022-04-01 | 2022-04-01 | Thermal barrier coating heat insulation structure for heat preservation of hot gas conduit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339793.4A CN114623323A (en) | 2022-04-01 | 2022-04-01 | Thermal barrier coating heat insulation structure for heat preservation of hot gas conduit |
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| Publication Number | Publication Date |
|---|---|
| CN114623323A true CN114623323A (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210339793.4A Pending CN114623323A (en) | 2022-04-01 | 2022-04-01 | Thermal barrier coating heat insulation structure for heat preservation of hot gas conduit |
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| CN (1) | CN114623323A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623322A (en) * | 2022-04-01 | 2022-06-14 | 西安热工研究院有限公司 | Aerogel heat insulation structure for heat preservation of hot gas conduit |
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|---|---|---|---|---|
| CN1617265A (en) * | 2004-12-03 | 2005-05-18 | 清华大学 | Convection and pressure loss preventing hot gas conduit |
| CN2823767Y (en) * | 2005-08-27 | 2006-10-04 | 张超 | Efficient vacuum heart insulation pipe |
| CN101852325A (en) * | 2010-05-19 | 2010-10-06 | 清华大学 | Thermal insulation layer structure |
| CN201925675U (en) * | 2011-01-19 | 2011-08-10 | 宜兴市华盛环保管道有限公司 | Partition type fixing support |
| CN102774089A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Novel gradient thermal barrier coating |
| US20150375299A1 (en) * | 2014-06-25 | 2015-12-31 | Halliburton Energy Services, Inc. | Insulation enclosure with a radiant barrier |
| CN105951028A (en) * | 2016-05-09 | 2016-09-21 | 西安交通大学 | Method for synchronously feeding powder to prepare ceramic based thermal barrier coating of continuous and gradual variation structure |
| CN109072398A (en) * | 2016-05-04 | 2018-12-21 | 布里卡拉反应堆斯德哥尔摩股份有限公司 | Pump for high temperature corrosion fluid |
| US20190277169A1 (en) * | 2018-03-06 | 2019-09-12 | Ohio State Innovation Foundation | Hollow Valve For An Engine |
| CN210687303U (en) * | 2019-07-15 | 2020-06-05 | 亚达管道系统股份有限公司 | Vacuum heat insulation double-wall pipe with internal fixed rigid support structure |
-
2022
- 2022-04-01 CN CN202210339793.4A patent/CN114623323A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1617265A (en) * | 2004-12-03 | 2005-05-18 | 清华大学 | Convection and pressure loss preventing hot gas conduit |
| CN2823767Y (en) * | 2005-08-27 | 2006-10-04 | 张超 | Efficient vacuum heart insulation pipe |
| CN101852325A (en) * | 2010-05-19 | 2010-10-06 | 清华大学 | Thermal insulation layer structure |
| CN201925675U (en) * | 2011-01-19 | 2011-08-10 | 宜兴市华盛环保管道有限公司 | Partition type fixing support |
| CN102774089A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Novel gradient thermal barrier coating |
| US20150375299A1 (en) * | 2014-06-25 | 2015-12-31 | Halliburton Energy Services, Inc. | Insulation enclosure with a radiant barrier |
| CN109072398A (en) * | 2016-05-04 | 2018-12-21 | 布里卡拉反应堆斯德哥尔摩股份有限公司 | Pump for high temperature corrosion fluid |
| CN105951028A (en) * | 2016-05-09 | 2016-09-21 | 西安交通大学 | Method for synchronously feeding powder to prepare ceramic based thermal barrier coating of continuous and gradual variation structure |
| US20190277169A1 (en) * | 2018-03-06 | 2019-09-12 | Ohio State Innovation Foundation | Hollow Valve For An Engine |
| CN210687303U (en) * | 2019-07-15 | 2020-06-05 | 亚达管道系统股份有限公司 | Vacuum heat insulation double-wall pipe with internal fixed rigid support structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623322A (en) * | 2022-04-01 | 2022-06-14 | 西安热工研究院有限公司 | Aerogel heat insulation structure for heat preservation of hot gas conduit |
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