CN212960446U - Cold insulation device of FLNG low-temperature pipeline - Google Patents
Cold insulation device of FLNG low-temperature pipeline Download PDFInfo
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- CN212960446U CN212960446U CN202021524863.6U CN202021524863U CN212960446U CN 212960446 U CN212960446 U CN 212960446U CN 202021524863 U CN202021524863 U CN 202021524863U CN 212960446 U CN212960446 U CN 212960446U
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- cold insulation
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- temperature pipeline
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- 238000009413 insulation Methods 0.000 title claims abstract description 51
- 239000012774 insulation material Substances 0.000 claims abstract description 20
- 239000005030 aluminium foil Substances 0.000 claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 239000013521 mastic Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 210000005069 ears Anatomy 0.000 claims 1
- 150000002148 esters Chemical class 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 44
- 238000005457 optimization Methods 0.000 description 8
- 239000011241 protective layer Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- LEHOTFFKMJEONL-UHFFFAOYSA-N Uric Acid Chemical compound N1C(=O)NC(=O)C2=C1NC(=O)N2 LEHOTFFKMJEONL-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229920000582 polyisocyanurate Polymers 0.000 description 2
- 239000011495 polyisocyanurate Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011494 foam glass Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Natural products OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 poly isocyanuric acid ester Chemical class 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a cold insulation device of FLNG low temperature pipeline, including the low temperature pipeline, the low temperature pipeline outside covers there is the aluminium foil layer, still includes the outer tube, be provided with the vacuum layer between outer tube and the aluminium foil layer, through bracing piece fixed stay between aluminium foil layer and the outer tube, the outer tube outside covers there is the cold insulation material layer, the cold insulation material layer outside covers there is the dampproof course, the dampproof course outside covers there is the outer jacket. The vacuum layer of the device does not need to maintain the high vacuum of the traditional vacuum cold insulationDegree of vacuum of not less than 1X 102~1×10‑1Pa can ensure the cold insulation effect, thereby greatly reducing the air extraction frequency and prolonging the maintenance interval time. The composite cold insulation structure is thin in thickness, saves cold insulation materials, is relatively low in price, and is easy to apply to cold insulation construction in narrow space.
Description
Technical Field
The utility model relates to a pipeline cold-keeping device especially relates to a LNG type low temperature pipeline cold-keeping device, belongs to pipeline cryrogenic insulation technical field.
Background
In order to ensure the liquefaction state of the medium in the pipeline, the cryogenic pipeline needs to adopt cold insulation measures so as to reduce the heat transfer between the ambient environment and the medium in the pipeline, prevent condensation on the outer wall of the pipeline and reduce the loss of cold energy in the cryogenic pipeline more economically and effectively. Cryogenic pipeline cold insulation typically employs stack insulation and vacuum insulation.
The stack insulation is a conventional insulation method, in which a porous type insulation material is laid on the outer side of a pipe, and insulation is achieved because the bubbles are filled with atmospheric air (or other gases).
The vacuum heat insulation comprises three types of high vacuum heat insulation, vacuum porous heat insulation and vacuum multilayer heat insulation, and the principle is that a heat insulation structure is made into a closed interlayer, and the internal space is pumped to high vacuum degree so as to reduce heat transfer.
The two cold insulation modes of accumulation heat insulation and vacuum heat insulation have advantages and disadvantages respectively: the vacuum heat insulation and cold insulation has more applications in low-temperature storage tanks and skid-mounted equipment pipelines in LNG projects at home and abroad, the mature related technology and the standard specification of detection and construction are relatively complete, the cold insulation design space occupies little space, the cold insulation effect is good, but the subsequent maintenance cost is high due to the requirement of continuously maintaining high vacuum degree.
It is the cold insulation mode that most LNG engineering projects adopted at present to pile up adiabatic, and this cold insulation mode is used one deck or multilayer foam glass or PIR (poly isocyanuric acid ester) alone or mix the collocation and lay outside the low temperature pipeline and reach adiabatic effect frequently, and this cold insulation structure space occupies great, adiabatic effect is not as adiabatic in the vacuum, and the construction is comparatively difficult in the narrow and small space, but simple structure, low cost, construction and maintenance convenience.
FLNG vessels have many cryogenic pipelines and piping is required to be compactly arranged. A cold insulation structure which saves space and has relatively low cost becomes an important research direction for the design of the cold insulation structure.
Disclosure of Invention
The utility model aims to solve the technical problem that under the condition of saving space, a FLNG low temperature pipeline cold insulation device that cost is cheap relatively and be convenient for maintain relatively is provided.
In order to solve the technical problem, the cold insulation device of FLNG low temperature pipeline of this scheme, including low temperature pipeline, the low temperature pipeline outside covers there is the aluminium foil layer, still includes the outer tube, be provided with the vacuum layer between outer tube and the aluminium foil layer, through bracing piece fixed stay between aluminium foil layer and the outer tube, the outer tube outside covers there is the cold insulation material layer, the cold insulation material layer outside covers there is the dampproof course, the dampproof course outside covers there is the outer jacket.
According to the further optimization scheme of the technical scheme, at least 3 support rods are arranged on the same cross section, and the inner side ends of adjacent support rods are fixed through hoops.
According to the further optimization scheme of the technical scheme, a rubber pad is arranged between the hoop and the aluminum foil layer.
According to the further optimization scheme of the technical scheme, the outer side end of the supporting rod is connected with the fixing plate through a bolt, and the fixing plate is welded on the inner wall of the outer pipe.
According to the further optimization scheme of the technical scheme, the supporting rod is an epoxy resin block.
According to a further optimization scheme of the technical scheme, the cold insulation material layer is a polyisocyanuric acid urate layer and/or a polyurethane layer.
According to the further optimization scheme of the technical scheme, the moisture-proof layer is a mastic layer.
According to a further optimization scheme of the technical scheme, the outer protective layer is a stainless steel layer or an aluminum alloy layer.
According to the further optimization scheme of the technical scheme, an insulating gasket is arranged between the bolt and the fixing plate.
The vacuum layer of the FLNG low-temperature pipeline cold insulation device does not need to maintain the high vacuum degree of the traditional vacuum cold insulation, and only needs to be not lower than the medium vacuum degree of 1 multiplied by 102 ~ 1×10-1Pa can ensure the cold insulation effect, thereby greatly reducing the air extraction frequency and prolonging the maintenance interval time. The composite cold insulation structure is thin in thickness, saves cold insulation materials, is relatively low in price, and is easy to apply to cold insulation construction in narrow space.
Drawings
FIG. 1 is a sectional view of a FLNG low-temperature pipeline cold insulation device.
Fig. 2 is a view showing the connection structure of the support rod and the fixing plate by bolts.
Fig. 3 is a partial structure view of the hoop connection between the support rods.
Detailed Description
Referring to fig. 1 to 3, the cold insulation device of the FLNG low-temperature pipeline comprises a low-temperature pipeline 9, wherein an aluminum foil layer 8 covers the low-temperature pipeline 9, and a vacuum layer 6 is arranged between the aluminum foil layer 8 and the outer pipe 5. The aluminum foil layer 8 and the vacuum layer 6 are fixed through epoxy resin blocks 7 with the same cross section uniformly distributed. The same cross section is optimally provided with 3 epoxy blocks 7. The inner ends of the adjacent epoxy resin blocks 7 are connected with each other through a hoop 12, and the inner end is the end close to the low-temperature pipeline 9. A rubber pad 17 is arranged between the hoop 12 and the aluminum foil layer. The outer end of the epoxy resin block 7 is connected with a fixing plate 10 through a bolt, and the fixing plate 10 is vertically welded on the inner side wall of the outer pipe 5. The epoxy resin block 7 is perpendicular to the outer side wall of the low-temperature pipeline 9, and the epoxy resin block 7 is also perpendicular to the inner side wall of the outer pipe 5.
The outer side of the outer pipe 5 is covered with a cold insulation material layer 4, and the cold insulation material layer 4 is a polyisocyanuric acid urate layer and/or a polyurethane layer. The cold insulation material layer 4 can be formed by splicing two cold insulation materials, and the splicing seams 3 need to be in staggered joint contact.
The outer side of the cold insulation material layer 4 is covered with a moisture-proof layer 2, and the moisture-proof layer 2 is a mastic layer.
The outer side of the moisture-proof layer 2 is covered with an outer protection layer 1, and the outer protection layer 1 is a stainless steel layer or an aluminum alloy layer.
The supporting structure between the low-temperature pipeline 9 and the outer pipe 5 is fixed by the epoxy resin block 7, so that no relative movement between the low-temperature pipeline 9 and the outer pipe 5 is ensured, the strength of the outer pipe 5 is enhanced, and deformation caused by extrusion collision is prevented. The epoxy resin block 7 is fixed by the hoop 12, so that welding with the low-temperature pipeline 9 is avoided, and heat loss in a heat transfer mode is reduced.
The vacuum layer 6 is arranged between the low-temperature pipeline 9 and the outer pipe 5, the lower vacuum degree is ensured through external air suction, so that a vacuum heat insulation layer is formed, and the aluminum foil layer 8 is arranged outside the low-temperature pipeline 9 and used for reducing radiation heat transfer.
Cold insulation materials such as polyisocyanurate, polyurethane and the like are laid outside the outer pipe 5, the cold insulation materials can be formed by one layer or two layers according to working condition requirements, the two layers need to be in staggered joint contact and filled with sealant when connected, and loss of cold energy through joints is reduced.
The cold insulation material layer 4 is externally coated with a mastic moisture-proof layer 2, so that external water vapor is prevented from entering a cold insulation structure to influence the performance of the cold insulation material.
The outermost layer is laid with a stainless steel or aluminum alloy outer protective layer 1, the two outer protective layers are resistant to seawater corrosion and external force impact, and the fireproof performance of the outer protective layer is better. Under the working condition that the fireproof performance requirement is not high, a lighter aluminum alloy outer guard can be laid.
Claims (9)
- The cold insulation device of FLNG low temperature pipeline, including the low temperature pipeline, the low temperature pipeline outside covers has aluminium foil layer, its characterized in that: still include the outer tube, be provided with the vacuum layer between outer tube and the aluminium foil layer, pass through bracing piece fixed stay between aluminium foil layer and the outer tube, the outer tube outside covers there is the cold insulation material layer, the cold insulation material layer outside covers there is the dampproof course, the dampproof course outside covers there is the outer jacket.
- 2. A cold insulation device for an FLNG cryogenic pipeline as claimed in claim 1, wherein: at least 3 support rods are arranged on the same cross section, and the inner side ends of adjacent support rods are fixed through anchor ears.
- 3. A cold insulation device for an FLNG cryogenic pipeline as claimed in claim 2, wherein: and a rubber pad is arranged between the hoop and the aluminum foil layer.
- 4. A cold insulation device for an FLNG cryogenic pipeline as claimed in claim 2, wherein: the outer side end of the supporting rod is connected with a fixing plate through a bolt, and the fixing plate is welded on the inner wall of the outer pipe.
- 5. A cold insulation device for an FLNG low-temperature pipeline according to claim 1, 2, 3 or 4, characterized in that: the support rod is an epoxy resin block.
- 6. A cold insulation device for an FLNG low-temperature pipeline according to claim 1, 2, 3 or 4, characterized in that: the cold insulation material layer is a polyisocyanuric acid ester layer and/or a polyurethane layer.
- 7. A cold insulation device for an FLNG low-temperature pipeline according to claim 1, 2, 3 or 4, characterized in that: the moisture-proof layer is a mastic layer.
- 8. A cold insulation device for an FLNG low-temperature pipeline according to claim 1, 2, 3 or 4, characterized in that: the outer jacket is a stainless steel layer or an aluminum alloy layer.
- 9. A cold insulation device for an FLNG cryogenic pipeline as claimed in claim 4, wherein: and an insulating gasket is arranged between the bolt and the fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021524863.6U CN212960446U (en) | 2020-07-29 | 2020-07-29 | Cold insulation device of FLNG low-temperature pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021524863.6U CN212960446U (en) | 2020-07-29 | 2020-07-29 | Cold insulation device of FLNG low-temperature pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212960446U true CN212960446U (en) | 2021-04-13 |
Family
ID=75344330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021524863.6U Active CN212960446U (en) | 2020-07-29 | 2020-07-29 | Cold insulation device of FLNG low-temperature pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212960446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339627A (en) * | 2021-06-16 | 2021-09-03 | 安徽晋煤中能化工股份有限公司 | Cold-insulation site construction method using seamless polyurethane |
-
2020
- 2020-07-29 CN CN202021524863.6U patent/CN212960446U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339627A (en) * | 2021-06-16 | 2021-09-03 | 安徽晋煤中能化工股份有限公司 | Cold-insulation site construction method using seamless polyurethane |
| CN113339627B (en) * | 2021-06-16 | 2022-08-26 | 安徽晋煤中能化工股份有限公司 | Cold-insulation site construction method using seamless polyurethane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 226000 port industrial zone 3, Nantong Economic and Technological Development Zone, Jiangsu Province Patentee after: Wison Clean Energy Technology Group Co.,Ltd. Country or region after: China Address before: 226009 Jianghai Road 189, Nantong Economic and Technological Development Zone, Nantong City, Jiangsu Province Patentee before: WISON(NANTONG) HEAVY INDUSTRY Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |