CN112233828A - Laying structure of heat tracing element of boron heat tracing system of nuclear power plant - Google Patents
Laying structure of heat tracing element of boron heat tracing system of nuclear power plant Download PDFInfo
- Publication number
- CN112233828A CN112233828A CN202011101638.6A CN202011101638A CN112233828A CN 112233828 A CN112233828 A CN 112233828A CN 202011101638 A CN202011101638 A CN 202011101638A CN 112233828 A CN112233828 A CN 112233828A
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- Prior art keywords
- heat tracing
- loop
- normal
- thermocouple
- cable
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- 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.)
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052796 boron Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 239000000523 sample Substances 0.000 abstract description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/02—Arrangements of auxiliary equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- General Physics & Mathematics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention relates to the technical field of installation of temperature probes of boron heat tracing systems of nuclear power plants, and particularly discloses a laying structure of heat tracing elements of the boron heat tracing systems of the nuclear power plants, wherein a normal loop heat tracing cable is arranged on the side wall of a process pipeline along the axis, and the position of the normal loop heat tracing cable is defined as the circumferential 0-degree position of the process pipeline; a standby loop heat tracing cable is arranged at a circumferential 180-degree position of the process pipeline; the normal loop temperature switch capillary tube and the normal loop thermocouple are arranged at a position of 90 degrees in the circumferential direction of the process pipeline, and the standby loop thermocouple and the standby loop temperature switch capillary tube are arranged at a position of 270 degrees in the circumferential direction of the process pipeline. The invention standardizes the laying of a thermocouple, a temperature switch and a heat tracing cable of a boron heat tracing system of a nuclear power plant, and avoids the problems of inconsistent master control and local temperature display, frequent starting and stopping of the heat tracing cable, unsynchronized starting and stopping of the temperature display and the heat tracing cable and the like caused by non-standardized installation.
Description
Technical Field
The invention belongs to the technical field of installation of temperature probes of boron heat tracing systems of nuclear power plants, and particularly relates to a laying structure of heat tracing elements of boron heat tracing systems of nuclear power plants.
Background
The boron heat tracing system provides heat tracing for pipelines and equipment through which the boric acid solution of the nuclear power plant flows, so that the boric acid solution is prevented from blocking the pipelines and the equipment due to low-temperature crystallization, normal circulation of fluid is maintained, and safe and stable operation of a unit is guaranteed.
At present, the nuclear power boron heat tracing system has more defects due to the fact that partial heat tracing elements are not laid in a standard mode. If the distance between the thermocouple and the heat tracing cable in the normal loop is short, the inconsistency between the main control and the local temperature display can be caused; the temperature switch capillary tube is too close to the heat tracing cable, so that the heat tracing cable is started and stopped frequently; the thermocouple and the temperature switch capillary are inconsistent from the heat tracing cable, so that the problem that the temperature display and the start and stop of the heat tracing cable are asynchronous can be caused.
Therefore, it is necessary to design a standard laying structure to solve the above problems.
Disclosure of Invention
The invention aims to provide a laying structure of a heat tracing element of a boron heat tracing system of a nuclear power plant, which standardizes the laying of a thermocouple, a temperature switch and a heat tracing cable of the boron heat tracing system.
The technical scheme of the invention is as follows:
a laying structure of a heat tracing element of a boron heat tracing system of a nuclear power plant is characterized in that a normal loop heat tracing cable is arranged on the side wall of a process pipeline along the axis, and the position of the normal loop heat tracing cable is defined as the circumferential 0-degree position of the process pipeline;
a standby loop heat tracing cable is arranged at a circumferential 180-degree position of the process pipeline;
and a normal loop temperature switch capillary tube and a normal loop thermocouple are arranged at a 90-degree position in the circumferential direction of the process pipeline, and a standby loop thermocouple and a standby loop temperature switch capillary tube are arranged at a 270-degree position in the circumferential direction of the process pipeline.
The normal loop temperature switch capillary tube, the normal loop heat tracing cable, the standby loop thermocouple, the standby loop temperature switch capillary tube, the standby loop heat tracing cable and the normal loop thermocouple are all fixed on the process pipeline through wire netting winding.
The outer side of the wire mesh is coated with a heat-conducting silica layer, and the normal loop temperature switch capillary tube, the normal loop heat tracing cable, the standby loop thermocouple, the standby loop temperature switch capillary tube, the standby loop heat tracing cable and the normal loop thermocouple are completely wrapped, so that the heat of the process pipeline can be better conducted to the normal loop temperature switch capillary tube, the standby loop thermocouple, the standby loop heat tracing cable and the normal loop thermocouple.
And the heat-conducting silica layer is wrapped with a heat-insulating material so as to reduce the heat loss of the process pipeline.
The thickness of the heat insulation material is more than or equal to 1.5 cm.
The normal loop temperature switch capillary is arranged on one side close to the normal loop heat tracing cable, and the normal loop thermocouple is arranged on one side close to the standby loop heat tracing cable.
The spare loop temperature switch capillary is arranged on one side close to the spare loop heat tracing cable, and the spare loop thermocouple is arranged on one side close to the normal loop heat tracing cable.
When the temperature of the boron-containing medium in the process pipeline is lower than the set minimum value, the normal loop heat tracing cable and the standby loop heat tracing cable are heated simultaneously, so that the heating is more uniform.
The invention has the following remarkable effects:
the invention standardizes the laying of a thermocouple, a temperature switch and a heat tracing cable of a boron heat tracing system of a nuclear power plant, and avoids the problems of inconsistent master control and local temperature display, frequent starting and stopping of the heat tracing cable, unsynchronized starting and stopping of the temperature display and the heat tracing cable and the like caused by non-standardized installation.
After the laying structure is applied to the site of a nuclear power plant, the problems of inconsistent master control and local temperature display, frequent starting and stopping of the heat tracing cable, unsynchronized starting and stopping of the temperature display and the heat tracing cable and the like are verified.
Drawings
FIG. 1 is a schematic view of the temperature probe laying of the boron heat tracing system.
In the figure: 1. a normal loop temperature switch capillary; 2. a normal loop heat tracing cable; 3. a process pipeline; 4. a backup loop thermocouple; 5. a backup loop temperature switch capillary; 6. a wire mesh; 7. a standby loop heat tracing cable; 8. heat-conducting silicon mud; 9. a thermal insulation material; 10. a normal loop thermocouple.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
The boron heat tracing system is designed with two identical heat tracing loops, which are divided into a normal loop and a standby loop. Each heat tracing loop comprises a heat tracing cable, a temperature switch and a temperature thermocouple. The thermocouple in the normal loop sends the temperature signal to the main control display, and the thermocouple in the standby loop sends the temperature signal to the local temperature indicating box for display.
In the laying structure of the heat tracing elements of the boron heat tracing system of the nuclear power plant shown in figure 1, a normal loop heat tracing cable 2 is arranged on the side wall of a process pipeline 3 along the axial line, and the position of the normal loop heat tracing cable is defined as the circumferential 0-degree position of the process pipeline 3.
A standby loop heat tracing cable 7 is arranged at a position of 180 degrees in the circumferential direction of the process pipeline 3, and when the temperature of a boron-containing medium in the process pipeline 3 is lower than a set lowest value, the normal loop heat tracing cable 2 and the standby loop heat tracing cable 7 are heated simultaneously, so that the heating is more uniform.
A normal loop temperature switch capillary tube 1 and a normal loop thermocouple 10 are arranged at a 90-degree position in the circumferential direction of the process pipeline 3, and a standby loop thermocouple 4 and a standby loop temperature switch capillary tube 5 are arranged at a 270-degree position in the circumferential direction of the process pipeline 3.
The normal loop temperature switch capillary tube 1 is arranged at one side close to the normal loop heat tracing cable 2, and the normal loop thermocouple 10 is arranged at one side close to the standby loop heat tracing cable 7. The spare loop temperature switch capillary 5 is arranged at one side close to the spare loop heat tracing cable 7, and the spare loop thermocouple 4 is arranged at one side close to the normal loop heat tracing cable 2.
The normal loop temperature switch capillary tube 1 and the standby loop temperature switch capillary tube 5 are 90 degrees apart from the normal loop heat tracing cable 2 and the standby loop heat tracing cable 7, so that the heating temperature interference of the normal loop heat tracing cable 2 and the standby loop heat tracing cable 7 can be reduced, and the normal loop temperature switch capillary tube 1 and the standby loop temperature switch capillary tube 5 can more truly measure the temperature of the process pipeline 3.
The normal loop thermocouple 10 and the standby loop thermocouple 4 are separated from the normal loop heat tracing cable 2 and the standby loop heat tracing cable 7 by 90 degrees, so that the heating temperature interference of the normal loop heat tracing cable 2 and the standby loop heat tracing cable 7 can be reduced, and the temperatures displayed by the normal loop thermocouple 10 and the standby loop thermocouple 4 are closer to the real temperature of the process pipeline 3.
The normal loop temperature switch capillary 1, the normal loop heat tracing cable 2, the standby loop thermocouple 4, the standby loop temperature switch capillary 5, the standby loop heat tracing cable 7 and the normal loop thermocouple 10 are all fixed on the process pipeline 3 through the wire netting 6 in a winding mode.
The outer side of the wire mesh 6 is coated with a heat-conducting silica gel layer 8, and the normal loop temperature switch capillary tube 1, the normal loop heat tracing cable 2, the standby loop thermocouple 4, the standby loop temperature switch capillary tube 5, the standby loop heat tracing cable 7 and the normal loop thermocouple 10 are completely wrapped, so that the heat of the process pipeline 3 can be better conducted to the normal loop temperature switch capillary tube 1, the standby loop thermocouple 4, the standby loop heat tracing cable 7 and the normal loop thermocouple 10.
And the heat-conducting silica gel layer 8 is wrapped with a heat-insulating material 9 so as to reduce the heat loss of the process pipeline 3. The thickness of the heat insulation material 9 is more than or equal to 1.5 cm.
Claims (8)
1. A structure for laying heat tracing elements of a boron heat tracing system of a nuclear power plant is characterized in that: a normal loop heat tracing cable (2) is arranged on the side wall of the process pipeline (3) along the axial line, and the position of the normal loop heat tracing cable is defined as the circumferential 0-degree position of the process pipeline (3);
a standby loop heat tracing cable (7) is arranged at a circumferential 180-degree position of the process pipeline (3);
a normal loop temperature switch capillary tube (1) and a normal loop thermocouple (10) are arranged at a 90-degree position in the circumferential direction of the process pipeline (3), and a standby loop thermocouple (4) and a standby loop temperature switch capillary tube (5) are arranged at a 270-degree position in the circumferential direction of the process pipeline (3).
2. The arrangement of the heat tracing elements of the boron heat tracing system of a nuclear power plant as claimed in claim 1, wherein: the normal loop temperature switch capillary tube (1), the normal loop heat tracing cable (2), the standby loop thermocouple (4), the standby loop temperature switch capillary tube (5), the standby loop heat tracing cable (7) and the normal loop thermocouple (10) are fixed on the process pipeline (3) through the wire netting (6) in a winding mode.
3. The arrangement of the heat tracing elements of the boron heat tracing system of a nuclear power plant as claimed in claim 2, wherein: wire netting (6) outside scribble and be equipped with heat conduction silica gel layer (8), with normal return circuit temperature switch capillary (1), normal return circuit heat tracing cable (2), spare return circuit thermocouple (4), spare return circuit temperature switch capillary (5), spare return circuit heat tracing cable (7), normal return circuit thermocouple (10) wrap up completely to conduct the heat of process pipeline (3) to normal return circuit temperature switch capillary (1), spare return circuit thermocouple (4), spare return circuit heat tracing cable (7), normal return circuit thermocouple (10) better.
4. A laying structure of heat tracing elements of a boron heat tracing system of a nuclear power plant as claimed in claim 3, characterized in that: and the heat-conducting silica gel layer (8) is wrapped with a heat-insulating material (9) so as to reduce the heat loss of the process pipeline (3).
5. The arrangement of the heat tracing elements of the boron heat tracing system of a nuclear power plant as claimed in claim 4, wherein: the thickness of the heat insulation material (9) is more than or equal to 1.5 cm.
6. The arrangement of the heat tracing elements of the boron heat tracing system of a nuclear power plant as claimed in claim 5, wherein: the normal loop temperature switch capillary tube (1) is arranged on one side close to the normal loop heat tracing cable (2), and the normal loop thermocouple (10) is arranged on one side close to the standby loop heat tracing cable (7).
7. The arrangement of the heat tracing elements of the boron heat tracing system of a nuclear power plant as claimed in claim 6, wherein: the spare loop temperature switch capillary tube (5) is arranged on one side close to the spare loop heat tracing cable (7), and the spare loop thermocouple (4) is arranged on one side close to the normal loop heat tracing cable (2).
8. The arrangement of the heat tracing elements of a boron heat tracing system of a nuclear power plant as claimed in claim 7, wherein: when the temperature of the medium containing boron in the process pipeline (3) is lower than the set minimum value, the normal loop heat tracing cable (2) and the standby loop heat tracing cable (7) are heated simultaneously, so that the heating is more uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011101638.6A CN112233828A (en) | 2020-10-15 | 2020-10-15 | Laying structure of heat tracing element of boron heat tracing system of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011101638.6A CN112233828A (en) | 2020-10-15 | 2020-10-15 | Laying structure of heat tracing element of boron heat tracing system of nuclear power plant |
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| Publication Number | Publication Date |
|---|---|
| CN112233828A true CN112233828A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011101638.6A Pending CN112233828A (en) | 2020-10-15 | 2020-10-15 | Laying structure of heat tracing element of boron heat tracing system of nuclear power plant |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064604A (en) * | 1990-02-07 | 1991-11-12 | Westinghouse Electric Corp. | Cost effective fluid line status sensor system |
| CN201407644Y (en) * | 2009-05-11 | 2010-02-17 | 成都四通科技投资有限公司 | Anti-freezing system of waste-heat boiler pipeline |
| CN201804287U (en) * | 2010-10-11 | 2011-04-20 | 中国核动力研究设计院 | Boron heating temperature control system in nuclear power plant |
| CN105761767A (en) * | 2016-03-31 | 2016-07-13 | 中广核工程有限公司 | Measurement device for temperature of outer wall face of nuclear power station pipeline |
| CN110762867A (en) * | 2019-10-25 | 2020-02-07 | 山东华春新能源有限公司 | Solar energy capillary temperature gradient case |
| CN110911021A (en) * | 2019-12-05 | 2020-03-24 | 上海核工程研究设计院有限公司 | Function verification test loop system of nuclear process pipeline leakage rate detection device |
| CN213519283U (en) * | 2020-10-15 | 2021-06-22 | 福建福清核电有限公司 | Laying structure of heat tracing element of boron heat tracing system of nuclear power plant |
-
2020
- 2020-10-15 CN CN202011101638.6A patent/CN112233828A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064604A (en) * | 1990-02-07 | 1991-11-12 | Westinghouse Electric Corp. | Cost effective fluid line status sensor system |
| CN201407644Y (en) * | 2009-05-11 | 2010-02-17 | 成都四通科技投资有限公司 | Anti-freezing system of waste-heat boiler pipeline |
| CN201804287U (en) * | 2010-10-11 | 2011-04-20 | 中国核动力研究设计院 | Boron heating temperature control system in nuclear power plant |
| CN105761767A (en) * | 2016-03-31 | 2016-07-13 | 中广核工程有限公司 | Measurement device for temperature of outer wall face of nuclear power station pipeline |
| CN110762867A (en) * | 2019-10-25 | 2020-02-07 | 山东华春新能源有限公司 | Solar energy capillary temperature gradient case |
| CN110911021A (en) * | 2019-12-05 | 2020-03-24 | 上海核工程研究设计院有限公司 | Function verification test loop system of nuclear process pipeline leakage rate detection device |
| CN213519283U (en) * | 2020-10-15 | 2021-06-22 | 福建福清核电有限公司 | Laying structure of heat tracing element of boron heat tracing system of nuclear power plant |
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