CN218719738U - Composite heat insulation type heat preservation and corrosion prevention hot steam pipeline - Google Patents
Composite heat insulation type heat preservation and corrosion prevention hot steam pipeline Download PDFInfo
- Publication number
- CN218719738U CN218719738U CN202222958693.8U CN202222958693U CN218719738U CN 218719738 U CN218719738 U CN 218719738U CN 202222958693 U CN202222958693 U CN 202222958693U CN 218719738 U CN218719738 U CN 218719738U
- Authority
- CN
- China
- Prior art keywords
- layer
- heat
- hot steam
- heat preservation
- corrosion
- 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.)
- Active
Links
Images
Landscapes
- Thermal Insulation (AREA)
Abstract
The utility model discloses compound thermal-insulated formula heat preservation anticorrosion hot steam conduit, including work steel pipe and outer inoxidizing coating, be provided with thermal-insulated heat preservation between work steel pipe and the outer inoxidizing coating, thermal-insulated heat preservation is aerogel layer, high temperature glass cotton felt layer, micropore calcium silicate layer and the special anti-radiation layer of long heat transfer net from work steel pipe to outer inoxidizing coating in proper order. The utility model discloses a improve the heat preservation, change the heat preservation that has now into adopting two-layer aerogel + one deck high temperature glass cotton felt + one deck micropore calcium silicate + long heat supply network special anti-radiation layer, the loss in the thermal power is carried can effectively be reduced in setting up of this heat preservation.
Description
Technical Field
The utility model belongs to the technical field of the pipeline, concretely relates to compound thermal-insulated formula heat preservation anticorrosive hot steam conduit.
Background
A pipeline for steam thermal power transport, steam energy supply system is with steam as the medium, bears heat energy, carries superheated steam to user's terminal heat transfer device through steam conduit, and the pipeline for steam transport that has now coats 70mm micropore calcium silicate +70mm micropore calcium silicate in proper order outside the working pipeline usually, and this kind of pipeline that sets up, because micropore calcium silicate coefficient of heat conductivity is higher, and contact with the rainwater for a long time can make its thermal insulation performance weaken to lead to pipeline heat dissipation's loss very big in whole steam transport process. Long-term water absorption also easily causes corrosion of the pipeline. The microporous calcium silicate heat-insulating layer has a short service life, and the heat-insulating material needs to be replaced after the microporous calcium silicate heat-insulating layer is used for 3 to 5 years.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims to provide a compound thermal-insulated formula heat preservation anticorrosion hot steam conduit.
The utility model discloses a following technical scheme realizes:
the composite heat-insulation type heat-preservation and corrosion-prevention hot steam pipeline comprises a working steel pipe and an outer protective layer, wherein a heat-insulation layer is arranged between the working steel pipe and the outer protective layer, and the heat-insulation layer sequentially comprises an aerogel layer, a high-temperature glass wool felt layer, a microporous calcium silicate layer and a special anti-radiation layer for a long heat transmission network from the working steel pipe to the outer protective layer.
Further, the aerogel layer is provided with two layers, and the thickness of each layer is 10mm.
Further, the thickness of the high-temperature glass wool felt layer is 30-70mm.
Further, the thickness of the microporous calcium silicate layer is 30-70mm.
Further, the density of the aerogel layer is 200 +/-20 kg/m 3 The heat conductivity coefficient is less than or equal to 0.036W/m.K at the average temperature of 300 ℃.
Further, the density of the high-temperature glass cotton felt layer =48kg +/-2 kg/m for carrying out thin-wall high-temperature glass cotton felt, the thermal conductivity coefficient is less than or equal to 0.039W/m.K at the average temperature of 70 ℃, and the highest use temperature is not less than 350 ℃.
Further, the density of the microporous calcium silicate layer is less than or equal to 200kg/m for harvesting, the heat conductivity coefficient is less than or equal to 0.069W/m.K at the average temperature of 300 ℃, and the highest service temperature is not less than 350 ℃.
Further, the special anti-radiation layer for the long heat transmission network can resist the temperature of 200 ℃.
Further, the outer protective layer is a color steel plate with the thickness of 0.5 mm.
The utility model discloses a improve the heat preservation, change the heat preservation that has now into adopting two-layer aerogel + one deck high temperature glass cotton felt + one deck micropore calcium silicate + long heat supply network special anti-radiation layer, the loss in the thermal power is carried can effectively be reduced in setting up of this heat preservation. The aerogel heat insulation felt belongs to an inorganic material, has A-grade fire resistance which is completely non-combustible, and has excellent fire resistance. The aerogel heat insulation felt has the advantages that the hydrophobicity is over 99%, water vapor is allowed to permeate through the aerogel heat insulation felt, and the aerogel heat insulation felt has unique hydrophobicity and breathability, so that the generation of condensation can be effectively reduced in the using process, and the Corrosion (CUI) under the heat insulation layer can be avoided to the greatest extent. The service life of the aerogel heat insulation felt is more than 15 years, which is 3-5 times of that of the traditional material, and the cost for replacing the heat insulation material and the cost for construction and operation can be effectively reduced.
Drawings
FIG. 1 is a schematic view of the layered structure of the present invention;
in the figure, 1-a working steel pipe, 2-an outer protective layer (2), 3-a heat insulation layer, 301-an aerogel layer, 302-a high-temperature glass wool felt layer, 303-a microporous calcium silicate layer and 304-a special anti-radiation layer for a long heat transfer network.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings for better understanding of the technical solution.
As shown in fig. 1, the utility model discloses compound thermal-insulated formula heat preservation anticorrosion hot steam conduit, including work steel pipe 1 and outer inoxidizing coating 2, outer inoxidizing coating 2 is the thick various steel sheet of 0.5mm, and the cladding has thermal-insulated heat preservation 3 on work steel pipe 1's the outer wall, and thermal-insulated heat preservation 3 is located between work steel pipe 1 and the outer inoxidizing coating 2, and thermal-insulated heat preservation 3 is aerogel layer 301, high temperature glass cotton felt layer 302, micropore calcium silicate layer 303 and the special anti-radiation layer 304 of long heat-transfer net from work steel pipe 1 to outer inoxidizing coating 2 in proper order. Wherein, the aerogel layer 301 is provided with two layers, and the thickness of each layer is 10mm; the thickness of the high-temperature glass wool felt layer 302 is 30-70mm; the thickness of the microporous calcium silicate layer 303 is 30-70mm. The specific different pipe diameter thickness requirements are different:
DN65, working steel tube: phi 76 x 4, insulation layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (30 mm) +1 layer of microporous calcium silicate (30 mm) + a special anti-radiation layer for a long heat transmission network;
DN80, working steel pipe: phi 89 x 4.5, insulating layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (35 mm) +1 layer of microporous calcium silicate (35 mm) + a special anti-radiation layer for a long heat transmission network;
DN100, working steel pipe: phi 108 x 4.5, insulation layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (35 mm) +1 layer of microporous calcium silicate (35 mm) + a special anti-radiation layer for a long heat transmission network;
DN125, working steel pipe: phi 133 x 4.5, insulation: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (40 mm) +1 layer of microporous calcium silicate (40 mm) + a special anti-radiation layer for a long heat transmission network;
DN150, working steel pipe: phi 159 x 5, insulating layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (40 mm) +1 layer of microporous calcium silicate (40 mm) + a special anti-radiation layer for a long heat transmission network;
DN200, working steel pipe: phi 219 x 6, insulating layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (50 mm) +1 layer of microporous calcium silicate (50 mm) + a special anti-radiation layer for a long heat transmission network;
DN250, working steel pipe: phi 273 x 7, insulating layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (50 mm) +1 layer of microporous calcium silicate (50 mm) + a special anti-radiation layer for a long heat transmission network;
DN300, working steel pipe: phi 325 x 8, insulating layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (60 mm) +1 layer of microporous calcium silicate (60 mm) + a special anti-radiation layer for a long heat transmission network;
DN350, working steel pipe: phi 377 x 9, insulating layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (60 mm) +1 layer of microporous calcium silicate (60 mm) + a special anti-radiation layer for a long heat transmission network;
DN400, working steel pipe: phi 426 x 10, insulating layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (60 mm) +1 layer of microporous calcium silicate (70 mm) + a special anti-radiation layer for a long heat transmission network;
DN450, working steel pipe: phi 478 x 10, insulation layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (60 mm) +1 layer of microporous calcium silicate (70 mm) + a special anti-radiation layer for a long heat transmission network;
DN500, working steel pipe: phi 529 x 10, insulating layer: 2 layers of aerogel (10mm + 10mm) +1 layer of high-temperature glass wool felt (70 mm) +1 layer of microporous calcium silicate (70 mm) + a special anti-radiation layer for a long heat transmission network.
The requirements of each heat-insulating material are as follows:
aerogel: the method meets the requirements of A-type products in GB/T34336-2017 'nanopore aerogel composite heat insulation products' standard, the density =200 +/-20 kg/m for carrying out high-speed harvest, and the heat conductivity coefficient (at the average temperature of 300 ℃) is less than or equal to 0.036W/m.K;
high-temperature glass wool felt: the high-temperature-resistant high-strength thermal insulation glass wool meets GB/T13350-2017 'thermal insulation glass wool and products thereof', the density is =48kg +/-2 kg/m, the thermal conductivity coefficient (at an average temperature of 70 ℃) is less than or equal to 0.039W/m.K, and the highest use temperature is not less than 350 ℃;
microporous calcium silicate: meet the requirements of GB/T10699-2015 calcium silicate heat insulation products, the density is less than or equal to 200kg/m, the heat conductivity coefficient (average temperature is 300 ℃) is less than or equal to 0.069W/m.K, and the highest use temperature is not less than 350 ℃;
the special anti-radiation layer for the long heat transmission network: the special anti-radiation layer (medium temperature resistant type) for the long heat transmission network has the temperature resistance of 140 +/-10 g/square meter and 200 ℃.
The utility model discloses a change the heat preservation into 2 layers of aerogel +1 layers of high temperature glass wool felt +1 layers of micropore calcium silicate + special anti-radiation layer of long heat-transfer net, effectively improve thermal insulation performance, take the following condition as an example:
the pipe diameter is DN450, the average temperature of the pipe network is kept at 250 ℃, the annual average air temperature in Hangzhou areas is 16 ℃, the annual average wind speed is 2.4m/s, the heat dissipation coefficient of the outer surface is alpha =1.163 (6 + 2.4/2) = 8.3736W/square meter, and the loss caused by factors such as insufficient manual heat preservation, bracket heat transfer and the like is increased by 10 percent.
In the prior art, the heat dissipation calculation of a heat preservation layer pipe network is as follows:
microporous calcium silicate thermal conductivity λ =0.041+0.0002 ((250 + 30)/2) = 0.069W/m ° c, the existing insulation material is considered to be 10% ineffective.
This application heat preservation pipe network heat dissipation calculates:
aerogel thermal conductivity λ 1= 0.023W/m ° c;
the thermal conductivity coefficient lambda 2=0.033+0.00023 [ (60 + 40)/2 ] = 0.0445W/m DEG C of the high-temperature glass cotton;
microporous calcium silicate thermal conductivity λ 3=0.041+0.0002 [ (40 + 30)/2 ] = 0.048W/m. ° c;
the calculation shows that the heat dissipation per meter of the pipe network is reduced, Q = (253.8-134.3) × 3600 × 24 × 365 =3.77 GJ/year.
Claims (9)
1. Composite heat insulation type heat preservation and corrosion prevention hot steam pipeline comprises a working steel pipe (1) and an outer protective layer (2), and is characterized in that a heat insulation layer (3) is arranged between the working steel pipe (1) and the outer protective layer (2), and the heat insulation layer (3) sequentially comprises an aerogel layer (301), a high-temperature glass wool felt layer (302), a microporous calcium silicate layer (303) and a special anti-radiation layer (304) for a long heat transmission net from the working steel pipe (1) to the outer protective layer (2).
2. The composite insulated heat-preserving and corrosion-preventing hot steam duct according to claim 1, wherein the aerogel layer (301) is provided with two layers each having a thickness of 10mm.
3. The composite heat-insulating and corrosion-preventing hot steam pipeline as claimed in claim 1, wherein the thickness of the high-temperature glass wool felt layer (302) is 30-70mm.
4. The composite heat-insulating heat-preserving corrosion-preventing hot steam pipeline as claimed in claim 1, wherein the thickness of the microporous calcium silicate layer (303) is 30-70mm.
5. The composite insulated thermal-insulating anticorrosive hot steam pipe of claim 1, wherein the aerogel layer (301) has a density of 200 ± 20kg/m 3 The heat conductivity coefficient is less than or equal to 0.036W/m.K at the average temperature of 300 ℃.
6. The composite insulated heat-insulating and corrosion-preventing hot steam pipeline according to claim 1, wherein the high-temperature glass mat layer (302) has a density =48kg ± 2kg/m for carrying out thin-wall cultivation, a thermal conductivity of 0.039W/m-K or less at an average temperature of 70 ℃, and a maximum service temperature of 350 ℃ or less.
7. The composite heat-insulating heat-preserving corrosion-preventing hot steam pipeline as claimed in claim 1, wherein the density of the microporous calcium silicate layer (303) is not more than 200 kg/mn through cultivation, the thermal conductivity is not more than 0.069W/m-K at an average temperature of 300 ℃, and the maximum service temperature is not less than 350 ℃.
8. The composite heat-insulating heat-preserving corrosion-preventing hot steam pipeline as claimed in claim 1, characterized in that the long heat-transporting network dedicated anti-radiation layer (304) is resistant to 200 ℃.
9. The composite heat-insulating heat-preserving corrosion-preventing hot steam pipeline as claimed in claim 1, wherein the outer protective layer (2) is a 0.5mm thick color steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222958693.8U CN218719738U (en) | 2022-11-08 | 2022-11-08 | Composite heat insulation type heat preservation and corrosion prevention hot steam pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222958693.8U CN218719738U (en) | 2022-11-08 | 2022-11-08 | Composite heat insulation type heat preservation and corrosion prevention hot steam pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218719738U true CN218719738U (en) | 2023-03-24 |
Family
ID=85609561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222958693.8U Active CN218719738U (en) | 2022-11-08 | 2022-11-08 | Composite heat insulation type heat preservation and corrosion prevention hot steam pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218719738U (en) |
-
2022
- 2022-11-08 CN CN202222958693.8U patent/CN218719738U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202955418U (en) | Steam direct buried pipe composite thermal insulation structure | |
| CN204612559U (en) | A kind of heat storage type energy saving water economizer | |
| CN101413620A (en) | Steel bushing steel vacuum high temperature steam prefabricated direct-buried thermal insulation pipe and producing method thereof | |
| CN218719738U (en) | Composite heat insulation type heat preservation and corrosion prevention hot steam pipeline | |
| CN101403580A (en) | Composite anti-corrosion heat-exchanger by using flue gas to condense thermal energy | |
| CN204756191U (en) | Compound pipe keeps warm | |
| CN210566733U (en) | Metal pipe with heat preservation performance | |
| CN209569454U (en) | Polyurethane thermal pipe | |
| CN202216226U (en) | Flue gas waste heat recovery device | |
| CN106338148A (en) | Solar flat-plate collector | |
| CN103086694A (en) | Enhanced insulating ceramic composite material as well as use thereof | |
| CN206468926U (en) | A kind of novel environment friendly composite thermal-insulating pipe | |
| CN215258499U (en) | Energy-saving high-density polyethylene heat-insulating pipe | |
| CN214579731U (en) | Cotton multilayer cold insulation structure pipeline of rubber and plastic heat preservation | |
| CN202598893U (en) | Low heat loss U-shaped tube type vacuum glass tube collector | |
| CN206131803U (en) | High -efficient transducer of floating coil pipe | |
| CN202902417U (en) | Environment-protecting and energy-saving superconducting pipe floor heating system | |
| CN214368292U (en) | Polyurethane heat-insulating pipeline | |
| CN203731012U (en) | Pipe heat insulation device made of multi-setting-foam glass material | |
| CN201764721U (en) | Wall mounting solar water heater for heating and bath | |
| CN203771708U (en) | Thermal insulation structure of fuel gas heating furnace | |
| CN211574438U (en) | Prefabricated built on stilts steam insulating tube | |
| CN211010207U (en) | Novel steel bushing steel insulating tube | |
| CN204285477U (en) | A kind of accumulation of energy anti-corrosion structure of dual firing chamber and dual firing chamber | |
| CN211344467U (en) | Heat insulation type bent pipe is strengthened to rain-proof cap that keeps warm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |