CN111508627A - High-temperature-resistant heat-insulation pipeline - Google Patents
High-temperature-resistant heat-insulation pipeline Download PDFInfo
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- CN111508627A CN111508627A CN202010376111.8A CN202010376111A CN111508627A CN 111508627 A CN111508627 A CN 111508627A CN 202010376111 A CN202010376111 A CN 202010376111A CN 111508627 A CN111508627 A CN 111508627A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
- G21C15/14—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from headers; from joints in ducts
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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
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a high-temperature-resistant heat-insulating pipeline. The high-temperature-resistant heat-insulating pipeline comprises a pipeline body, a first heat-insulating layer and a second heat-insulating layer; the first heat-insulating layer and the second heat-insulating layer are sequentially wrapped on the outer side of the pipeline body; the pipeline body is sequentially divided into a first section, a second section and a third section along the flowing direction of fluid in the pipeline body; the second heat-insulating layer is arranged at the second section and the third section; the second heat-insulating layer arranged at the third section comprises a first carbon steel layer, a serpentine layer and a second carbon steel layer which are sequentially arranged, and the first carbon steel layer, the serpentine layer and the second carbon steel layer are sequentially wrapped on the outer side of the first heat-insulating layer. The high-temperature-resistant heat-insulating pipeline has good heat-insulating effect and long service life; when the concrete is applied to the molten salt reactor, the energy consumption is low due to the adoption of a passive heat insulation mode, and the temperature of the concrete used on the molten salt reactor is required to be lower than a safety limit value in use.
Description
Technical Field
The invention relates to a high-temperature-resistant heat-insulating pipeline.
Background
The existing pipeline used in the pressurized water reactor usually adopts forced ventilation cooling because the passive requirement is not met; however, this method is time-consuming and inefficient. In addition, the passive pressurized water reactor has become a hot research reactor type, in a molten salt reactor system, a cooling salt pipeline and a passive residual heat exhaust air pipe penetrate through a reactor cabin, and concrete used on the molten salt reactor is obviously lower than the working temperature of a high-temperature pipeline, so that the high-temperature pipeline needs to be subjected to heat insulation treatment, and the safety of the reactor and public environment is fully ensured.
At present, the heat dissipation treatment mode of the high-temperature pipeline is mostly a forced cooling method for accelerating the fluid speed by using a fan or a pump so as to improve the heat dissipation effect, although the cooling speed is high, when the ambient temperature is too high, the air cooling heat dissipation effect is limited, the air cooling still needs power support, the energy consumption is higher, and therefore the high-temperature pipeline with the passive heat insulation mode needs to be designed.
However, most of the high temperature pipes in the prior art are rigidly fixed directly to the pipe body by a metal structure or an insulating material. However, the metal structure has a large heat conductivity coefficient, and the high-temperature pipeline is easy to conduct heat to the pipeline body, so that heat loss of the high-temperature pipeline is caused; the heat insulating material is soft and cannot be stably fixed on the pipeline body, and when the pipeline vibrates violently, the heat insulating material is easy to deform and even damage, so that the service life of the heat insulating material is short.
Therefore, it is highly desirable to provide a high temperature resistant heat insulation pipeline with a passive heat insulation mode, good heat insulation effect and long service life.
Disclosure of Invention
The invention aims to overcome the defects of poor heat insulation effect or short service life of a high-temperature heat insulation pipeline and provide a high-temperature resistant heat insulation pipeline. Compared with the prior art, the high-temperature-resistant heat-insulating pipeline has the advantages of good heat-insulating effect and long service life; when the concrete is applied to the molten salt reactor, the energy consumption is low due to the adoption of a passive heat insulation mode, and the temperature of the concrete used on the molten salt reactor is required to be lower than a safety limit value in use.
The invention solves the technical problems through the following technical scheme:
the invention provides a high-temperature-resistant heat-insulation pipeline which comprises a pipeline body, a first heat-insulation layer and a second heat-insulation layer, wherein the pipeline body is provided with a first heat-insulation layer and a second heat-insulation layer;
the first heat-insulating layer and the second heat-insulating layer are sequentially wrapped on the outer side of the pipeline body;
the pipeline body is sequentially divided into a first section, a second section and a third section along the flowing direction of fluid in the pipeline body; the second heat-insulating layer is arranged on the second section and the third section;
the second heat-insulating layer arranged at the third section comprises a first carbon steel layer, a serpentine layer and a second carbon steel layer which are sequentially arranged, and the first carbon steel layer, the serpentine layer and the second carbon steel layer are sequentially wrapped on the outer side of the first heat-insulating layer.
In the invention, preferably, a carbon steel plate is arranged at one end of the second heat-insulating layer arranged at the third section, which is far away from the first section of the pipeline body.
Wherein the carbon steel plate is preferably annular in shape. When the carbon steel plate is annular in shape, the inner diameter of the carbon steel plate may be equal to the outer diameter of the first heat insulating layer; the outer diameter of the carbon steel plate may be greater than that of the second insulating layer disposed at the third section. The length of the carbon steel plate along the axial direction of the pipeline body can be the length of the carbon steel plate conventional in the field, such as 10-20 mm, and preferably 20 mm.
In the present invention, the length of the pipe body is preferably the sum of the lengths of the carbon steel plate, the first section, the second section, and the third section in the axial direction of the pipe body.
In the present invention, the diameter of the pipe body may be 200mm or less, preferably 167.3 mm.
Wherein, the fluid flowing inside the pipeline body can be a fluid conventional in the field; preferably 600 c to 700 c, such as a molten salt and/or a gas.
The direction of flow of the fluid may be from the first section to the second section and then from the second section to the third section.
In the present invention, the length of the first heat insulating layer is preferably equal to the length of the pipe body.
The first heat-insulating layer can be a heat-insulating material conventional in the art, and is preferably a heat-insulating material with a thermal conductivity of less than 0.05W/(m · K), such as nanofiber or aerogel.
The thickness of the first heat-insulating layer can be selected according to actual needs, and is preferably less than or equal to 200 mm. For example, the thickness of the first thermal insulation layer can be conventional in the art, and is generally 100 to 200mm, and preferably 116.5 mm.
Wherein the nanofibers may be nanofibers conventional in the art. The person skilled in the art will know that nanofibres in general refer to nanomaterials produced on the basis of the principle of nanoporous insulation, such as for example titanium silicate nanofibres or aluminium silicate nanofibres.
The aerogel is generally a gel which is filled with a gas medium and takes a solid shape in appearance, and is known to those skilled in the art. The aerogel can be an aerogel conventional in the art; preferably one or more of gelatin, gum arabic and silica gel.
In the present invention, preferably, the second insulating layer vertically penetrates through the second section and the third section.
The second insulating layer disposed on the second section may be an insulating material conventional in the art, preferably an insulating material having a thermal conductivity of less than 0.05W/(m · K), such as nanofiber or aerogel.
The thickness of the second insulating layer arranged on the second section can be the conventional thickness in the field, and can be selected by a person skilled in the art according to the actual needs, and is preferably less than or equal to the thickness of the second insulating layer arranged on the second section; more preferably 400mm or less; for example 200 to 400mm, and further for example 300 mm.
The thickness of the first carbon steel layer, the serpentine layer or the second carbon steel layer in the second insulating layer of the third section may be a thickness conventional in the art, for example, 90 to 150mm, and preferably 100 mm.
Wherein the carbon steel of the first carbon steel layer or the second carbon steel layer may be carbon steel conventionally commercially available in the art.
The serpentine in the serpentine layer can be serpentine as is conventional in the art. It will be appreciated by those skilled in the art that serpentine is generally referred to as an aqueous magnesium-rich silicate mineral. The serpentine has a density of 2.44-2.80 g/cm3Preferably 2.57 g-cm3. The Mohs hardness of the serpentine can be 2.5-4.
In the present invention, the shape of the first insulating layer, the second insulating layer, the first carbon steel layer, the serpentine layer, or the second carbon steel layer may be a shape conventional in the art, and is preferably a ring shape.
In the invention, a person skilled in the art can select the second insulating layer arranged at the third section according to actual conditions. For example, the second insulation layer disposed in the third section may further include one or more of a nanofiber layer, a carbon steel layer, a serpentine layer, and an aerogel layer, taking into account temperature requirements.
In the present invention, preferably, the pipeline body and the first heat insulating layer vertically penetrate through a first section structure, a second section structure and a third section structure which are sequentially arranged along a fluid flowing direction inside the pipeline body.
The shape of the first, second or third segment structure may be conventional in the art, preferably annular.
The length of the first section structure along the axial direction of the pipeline body can be 0.9-1.5 m; preferably 1 m.
The length of the second section of structure along the axial direction of the pipeline body can be 0.5-1.0 m; preferably 0.6 m.
The length of the third section structure along the axial direction of the pipeline body can be 0.9-1.5 m; preferably 1.1 m.
Wherein the first section structure may be an insulation layer section. The insulation layer segments may be insulation material conventional in the art, such as aluminum silicate fibers.
The second segment structure may be a serpentine segment. The serpentine of the serpentine segments is as previously described.
The third segment structure may be a concrete segment. The concrete of the concrete section may be concrete conventional in the art.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The reagents and starting materials used in the present invention are commercially available.
The positive progress effects of the invention are as follows:
(1) the high-temperature resistant heat insulation pipeline does not need forced cooling, and has low energy consumption;
(2) the high-temperature-resistant heat-insulating pipeline has good heat-insulating effect and long service life;
(3) when the high-temperature resistant heat-insulating pipeline is applied to a molten salt pile, the temperature of concrete used on the molten salt pile in use is obviously lower than the working temperature of the high-temperature pipeline, taking TMSR-SF1 molten salt pile as an example, the maximum temperature of the concrete in a pile cabin is 67 ℃, and is lower than a safety limit value (70 ℃).
Drawings
FIG. 1 is a sectional view of a high temperature resistant and heat insulating pipe of a molten salt reactor in the axial direction of a pipe body in example 1 of the present invention.
FIG. 2 is a cross-sectional view of a concrete segment of a high temperature resistant and heat insulating pipe of a molten salt reactor in example 1 of the present invention, taken along a radial section of the pipe body.
FIG. 3 is a sectional view of a serpentine segment of a refractory and heat-insulating molten salt reactor pipeline along a radial section of a pipeline body according to example 1 of the present invention.
FIG. 4 is a cross-sectional view of the heat insulation layer segment of the high temperature resistant heat insulation pipeline of the molten salt reactor in the embodiment 1 of the invention along the radial section of the pipeline body.
Description of the reference numerals
Insulating layer segment 1
First insulating layer 91
Second insulating layer 92
First carbon steel layer 5
Second carbon steel layer 7
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
The high temperature resistant heat insulation pipeline for the molten salt reactor in the embodiment 1 comprises: the pipeline comprises a pipeline body (4), a first heat-insulating layer (91) and a second heat-insulating layer (92);
the first heat-insulating layer (91) and the second heat-insulating layer (92) are sequentially wrapped on the outer side of the pipeline body (4);
the pipeline body (4) is sequentially divided into a first section, a second section and a third section along the flowing direction of fluid in the pipeline body (4); the second heat-insulating layer (92) is arranged at the second section and the third section;
the second heat-insulating layer (92) arranged at the third section comprises a first carbon steel layer (5), a serpentine layer (6) and a second carbon steel layer (7) which are sequentially arranged, and the first carbon steel layer (5), the serpentine layer (6) and the second carbon steel layer (7) are sequentially wrapped on the outer side of the first heat-insulating layer (91).
Wherein, the end of the second heat-insulating layer (92) arranged at the third section, which is far away from the first section of the pipeline body (4), is provided with a carbon steel plate (8).
The carbon steel plate (8) is annular in shape. The inner diameter of the carbon steel plate (8) is equal to the outer diameter of the first heat preservation layer (91); the outer diameter of the carbon steel plate (8) is larger than that of the second heat-insulating layer (92) arranged at the third section. The length of the carbon steel plate (8) along the axial direction of the pipeline body (4) is 20 mm.
The length of the pipeline body (4) is the sum of the lengths of the carbon steel plate (8), the first section, the second section and the third section along the axial direction of the pipeline body (4).
The diameter of the pipeline body (4) is 167.3 mm.
The fluid flowing inside the pipeline body (4) is high-temperature molten salt and high-temperature gas, wherein the temperature of the molten salt and the temperature of the gas are 650 ℃.
The molten salt and the gas flow in the direction from the first section to the second section and then from the second section to the third section.
Wherein the length of the first heat-insulating layer (91) is equal to the length of the pipeline body (4).
The thickness of the first heat-insulating layer (91) is 116.5 mm.
The first heat preservation layer (91) is titanium silicate nano-fiber with the heat conductivity coefficient less than 0.05W/(m.K).
Wherein, the second insulating layer (92) vertically penetrates through the second section and the third section which are arranged in sequence.
The second heat-insulating layer (92) arranged at the second section is titanium silicate nano-fiber with the heat conductivity coefficient less than 0.05W/(m.K).
The thickness of the second heat-insulating layer (92) arranged on the second section is 300 mm.
The thickness of the second heat-insulating layer (92) arranged on the third section is equal to that of the second heat-insulating layer (92) arranged on the second section.
The thicknesses of the first carbon steel layer (5), the serpentine layer (6) and the second carbon steel layer (7) in the second heat-insulating layer (92) arranged at the third section are all 100 mm.
Wherein the carbon steel of the first carbon steel layer (5) and the second carbon steel layer (7) is commercially available carbon steel. The serpentine in the serpentine layer (6) has a density of 2.57g/cm3(ii) a The Mohs hardness is 2.5 to 4.
Wherein the first heat-insulating layer (91), the second heat-insulating layer (92), the first carbon steel layer (5), the serpentine layer (6) and the second carbon steel layer (7) are all annular in shape.
The pipeline body (4) and the first heat preservation layer (91) vertically penetrate through a first section structure, a second section structure and a third section structure which are sequentially arranged along the flowing direction of fluid in the pipeline body (4).
The first section structure, the second section structure and the third section structure are all annular in shape.
The length of the first section structure along the axial direction of the pipeline body is 1 m. The length of the second section structure along the axial direction of the pipeline body is 0.6 m. The length of the third structure section along the axial direction of the pipeline body is 1.1 m.
Wherein, the first-stage structure is a heat insulation layer section (1), and the heat insulation layer section (1) is aluminum silicate fiber. The second section structure is a serpentine section (2). The third section structure is a concrete section (3).
In example 1, the concrete used on the TMSR-SF1 molten salt pile was at a temperature in use significantly lower than the operating temperature of the high temperature pipeline, the maximum temperature of the concrete in the cabin was 67 ℃, and was below the safety limit (70 ℃).
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. The high-temperature-resistant heat-insulation pipeline is characterized by comprising a pipeline body, a first heat-insulation layer and a second heat-insulation layer;
the first heat-insulating layer and the second heat-insulating layer are sequentially wrapped on the outer side of the pipeline body;
the pipeline body is sequentially divided into a first section, a second section and a third section along the flowing direction of fluid in the pipeline body; the second heat-insulating layer is arranged on the second section and the third section;
the second heat-insulating layer arranged at the third section comprises a first carbon steel layer, a serpentine layer and a second carbon steel layer which are sequentially arranged, and the first carbon steel layer, the serpentine layer and the second carbon steel layer are sequentially wrapped on the outer side of the first heat-insulating layer.
2. The high temperature resistant and heat insulating pipeline according to claim 1, wherein a carbon steel plate is arranged at one end of the second insulating layer arranged at the third section, which is far away from the first section;
the carbon steel plate is preferably annular in shape;
preferably, when the carbon steel plate is annular in shape, the inner diameter of the carbon steel plate is equal to the outer diameter of the first heat-insulating layer; the outer diameter of the carbon steel plate is larger than that of the second heat-insulating layer arranged at the third section;
the length of the carbon steel plate along the axial direction of the pipeline body is preferably 10-20 mm, and more preferably 20 mm.
3. The high temperature resistant insulated duct of claim 1 or 2, wherein the duct body has a length that is the sum of the lengths of the carbon steel sheet, the first section, the second section, and the third section in the axial direction of the duct body.
4. A high temperature resistant insulated pipe according to claim 1, characterized in that the pipe body has a diameter of 200mm or less, preferably 167.3 mm;
the fluid flowing inside the pipe body is preferably a fluid at 600 ℃ to 700 ℃, more preferably a molten salt and/or a gas.
5. The high temperature resistant and insulating pipeline of claim 1, wherein the thickness of the first insulating layer is 200mm or less, preferably 100 to 200mm, more preferably 116.5 mm; the first heat-preservation layer is preferably a heat-insulation material with a heat conductivity coefficient of less than 0.05W/(m.K), and is more preferably nanofiber or aerogel;
the aerogel is preferably one or more of gelatin, gum arabic and silica gel.
6. The high temperature resistant and insulating pipeline of claim 1, wherein the second insulating layer is vertically perforated in the second section and the third section;
the second heat-insulating layer arranged at the second section is preferably a heat-insulating material with a heat conductivity coefficient less than 0.05W/(m.K), and more preferably nanofiber or aerogel;
the thickness of the second heat-insulating layer arranged on the second section is preferably less than 400mm, more preferably 200-400 mm, such as 300 mm;
and/or the thickness of the first carbon steel layer, the serpentine layer or the second carbon steel layer arranged in the third section of the second heat insulation layer is 90-150 mm, preferably 100 mm;
the preferred density of the serpentine in the serpentine layer is 2.44-2.80 g/cm3More preferably 2.57g/cm3；
The Mohs hardness of the serpentine is preferably 2.5-4.
7. The high temperature resistant insulated pipe of claim 1 wherein the first insulation layer, the second insulation layer, the first carbon steel layer, the serpentine layer, or the second carbon steel layer is annular in shape;
the second insulating layer disposed in the third section preferably comprises one or more of a nanofiber layer, a carbon steel layer, a serpentine layer, and an aerogel layer.
8. The high temperature resistant and heat insulating pipeline according to claim 1, wherein the pipeline body and the first heat insulating layer are vertically penetrated through a first section structure, a second section structure and a third section structure which are sequentially arranged along the flow direction of fluid inside the pipeline body;
the first, second or third segment is preferably annular in shape.
9. The high temperature resistant insulated duct of claim 8, wherein the first segment structure has a length of 0.9 to 1.5m in the axial direction of the duct body; preferably 1 m;
and/or the length of the second section of structure along the axial direction of the pipeline body is 0.5-1.0 m; preferably 0.6 m;
and/or the length of the third section structure along the axial direction of the pipeline body is 0.9-1.5 m; preferably 1.1 m.
10. The high temperature resistant insulated pipe of claim 8 or 9, wherein the first stage structure is an insulation layer segment; the material of the heat insulation layer sections is preferably aluminum silicate fiber;
and/or, the second segment structure is a serpentine segment;
and/or the third section structure is a concrete section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376111.8A CN111508627A (en) | 2020-05-07 | 2020-05-07 | High-temperature-resistant heat-insulation pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376111.8A CN111508627A (en) | 2020-05-07 | 2020-05-07 | High-temperature-resistant heat-insulation pipeline |
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| CN111508627A true CN111508627A (en) | 2020-08-07 |
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| CN202010376111.8A Pending CN111508627A (en) | 2020-05-07 | 2020-05-07 | High-temperature-resistant heat-insulation pipeline |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220572A (en) * | 2021-11-02 | 2022-03-22 | 中国核电工程有限公司 | Passive residual heat removal device of movable micro reactor |
| US12012827B1 (en) | 2023-09-11 | 2024-06-18 | Natura Resources LLC | Nuclear reactor integrated oil and gas production systems and methods of operation |
| US12018779B2 (en) | 2021-09-21 | 2024-06-25 | Abilene Christian University | Stabilizing face ring joint flange and assembly thereof |
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2020
- 2020-05-07 CN CN202010376111.8A patent/CN111508627A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12018779B2 (en) | 2021-09-21 | 2024-06-25 | Abilene Christian University | Stabilizing face ring joint flange and assembly thereof |
| CN114220572A (en) * | 2021-11-02 | 2022-03-22 | 中国核电工程有限公司 | Passive residual heat removal device of movable micro reactor |
| US12012827B1 (en) | 2023-09-11 | 2024-06-18 | Natura Resources LLC | Nuclear reactor integrated oil and gas production systems and methods of operation |
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