CN208635974U - A kind of fused salt heat storage can leak detection apparatus - Google Patents
A kind of fused salt heat storage can leak detection apparatus Download PDFInfo
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- CN208635974U CN208635974U CN201820887498.1U CN201820887498U CN208635974U CN 208635974 U CN208635974 U CN 208635974U CN 201820887498 U CN201820887498 U CN 201820887498U CN 208635974 U CN208635974 U CN 208635974U
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Abstract
The utility model relates to a kind of fused salt heat storage can leak detection apparatus, belong to heat storage can safety detection technology field.A kind of fused salt heat storage can leak detection apparatus, including below tank bottom first layer heat-barrier material optical fiber optical grating array, be arranged in insulating layer along tank skin axis direction optical fiber optical grating array, side connection optical fiber optical grating array outer end circulator, the wideband light source that is connect with the circulator other side and the demodulating system for receiving and processing the optical signal reflected in circulator；The optical fiber optical grating array uses the concatenated fiber Bragg grating sensor of optical fiber to be several；The demodulating system includes wavelength division multiplexer, photoelectric receiving tube, signal conditioning circuit, data collecting card and signal processor.The fused salt heat storage can leak detection apparatus of the utility model can fast and accurately detect a kind of fused salt heat storage can leak detection apparatus of heat storage can leak point in the case where not destroying fused salt heat storage can heat insulating effect.
Description
Technical field
The utility model relates to a kind of fused salt heat storage can leak detection apparatus, belong to heat storage can safety detection technology field.
Background technique
Solar light-heat power-generation is developed rapidly as a kind of emerging solar energy generation technology.But due to it
Developing stage is constantly also being explored, various problems demands is being encountered in the process of running and solves.
Current most mature and common heat-storage medium is fused salt, and use temperature range is up to 290 DEG C -565 DEG C, has cost
Low, the advantages that quantity of heat storage is big, stability is good, but fused salt has corrosivity, often will appear in solar heat solar-thermal generating system
Fused salt leakage, stifled phenomenon, since the freezing point and use temperature of fused salt are higher, system equal spies higher to the thermal requirements of heat storage can
Point so that the leak detection of fused salt heat storage can there are certain difficulty.
The leak hunting method of solar energy thermal-power-generating fused salt heat storage can is different from general storage tank, firstly, the freezing point of fused salt is high,
The fused salt of leakage solidifies to the cold, it is not easy to flow out from the load-bearing of tank bottom and insulation construction and be found in time；Secondly, too
The positive heat reservoir that hot can generate electricity is higher to thermal requirements, and heat insulation effect directly affects the thermal efficiency of system, therefore is considering to examine
The minimal insulation construction for influencing heat storage can is wanted while leakage.
Fused salt heat accumulation tank volume is larger, and the tank bottom diameter of fused salt heat storage can generally reaches 30 to four ten meters or more, and
The fused salt of high temperature is contained in tank, once design, the heat storage can lack of standardization that will result in of constructing are revealed, larger fused salt heat storage can
It is not easy to be found when leaking and is difficult to detect specific leakage point, therefore, how fast and accurately positions leakage
Point is one and is badly in need of the problem captured.Currently, temperature point usually is arranged in tank bottom and tank skin different location, this method can only be examined
Leakage is measured, but leak point cannot be accurately positioned.
Utility model content
The purpose of the utility model is to provide one kind can in the case where not destroying fused salt heat storage can heat insulating effect
Fast and accurately detect a kind of fused salt heat storage can leak detection apparatus of heat storage can leak point.
To achieve the goals above, the technical solution adopted in the utility model is:
A kind of fused salt heat storage can leak detection apparatus, it is characterised in that: including the light below tank bottom first layer heat-barrier material
Fine grating array the optical fiber optical grating array in insulating layer is arranged in along tank skin axis direction, outside side connection optical fiber optical grating array
The circulator at end, the wideband light source being connect with the circulator other side and the solution for receiving and processing the optical signal reflected in circulator
Adjusting system；The optical fiber optical grating array uses the concatenated fiber Bragg grating sensor of optical fiber to be several；The demodulating system
Including being sequentially connected the wavelength division multiplexer for being demodulated to the optical signal reflected in circulator of progress information transmitting, will solve
It adjusts the optical signal obtained to be converted to the photoelectric receiving tube of electric signal, be acquired processing to electric signal and the signal condition of amplification electricity
Road, data collecting card and signal processor.
Technical solutions of the utility model further improvement lies in that: the optical fiber optical grating array of tank bottom from center to external spiral arrange
Cloth is below first layer heat-barrier material.
Technical solutions of the utility model further improvement lies in that: optical fiber optical grating array on the outside of tank skin spiral from top to bottom
It is arranged in tank skin insulating layer.
Technical solutions of the utility model further improvement lies in that: the optical fiber optical grating array helix of tank bottom be snail
Line, the distance between described snail line adjacent curve are 0.8~1.0m.
Technical solutions of the utility model further improvement lies in that: the lead of the spiral of the optical fiber optical grating array of tank skin arrangement
For 0.8~1.0m.
Technical solutions of the utility model further improvement lies in that: the optical fiber is metal coated fiber, and optical fiber is additional not
The oversheath of rust Steel material.
By adopting the above-described technical solution, the technical effect that the utility model obtains has:
The fused salt heat storage can leak detection apparatus of the utility model can fast, accurately detect letting out for fused salt heat storage can
Leak source, and the installation of the detection device does not influence the insulation construction and effect of heat storage can, makes the security performance of heat storage can significantly
It improves.Under the premise of not increasing system investments, the accuracy of system, reliability are improved, safety makes engineering design, construction
Debugging, the running fused salt heat storage can leak detection problem in power station are eradicated, and construction investment cost is reduced, and equipment is made to run the longevity
Life lengthens, and the safety of power station operation is improved.
There is the fiber Bragg grating sensor of the utility model corrosion-resistant, electromagnetism interference, small in size, easy networking to pass
The advantages that defeated, at the same the center reflection wavelength of fiber Bragg grating sensor have to parameters such as temperature, strain, refractive index it is quick
The characteristic of sense.Fiber Bragg grating sensor can be easy to be together in series, and form optical fiber optical grating array, an optical fiber multiple spot
Measurement constitutes distributed detection system, and the reflection center wavelength of light drift value by observing each point can fast and accurately be sentenced
Disconnected leakage point position out.
The optical fiber of the utility model is metal coated fiber, and the oversheath of the additional stainless steel material of optical fiber is applied by melting
It covers method and accurately controls sputtering furnace power, reactive material flow and optical fiber folding and unfolding speed, so that bare fibre surface sputters uniform clothing
Layer, refractory metal material tightly overlay on bare fibre, work normally optical fiber at high temperature.
The tank bottom of the utility model and the optical fiber optical grating array of tank skin are arranged under tank bottom first layer heat-barrier material
In side and tank skin insulating layer, optical fiber optical grating array is avoided directly to contact the outside wall temperature of fused salt tank, avoids directly measuring outer wall
Temperature and cannot be distinguished fused salt tank whether leak.
It is divided between adjacent two helix of the optical fiber optical grating array arrangement of the tank bottom and tank skin of the utility model
0.8-1.0m, such spacing distance can guarantee that the entire of fused salt heat storage can is completely covered in the detection range of optical fiber optical grating array
Can body.
Detailed description of the invention
Fig. 1 is floor plan of the optical fiber optical grating array below fused salt heat storage can tank bottom thermal insulation layer；
Fig. 2 is layout drawing of the optical fiber optical grating array in fused salt heat storage can tank skin insulating layer
Fig. 3 is fused salt heat storage can leak detection flow diagram；
Wherein, 1, optical fiber optical grating array, 2, first layer heat-barrier material.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described in further details the utility model:
The utility model discloses a kind of fused salt heat storage can leak detection apparatus, which can fast, accurately be detected
The leakage point of fused salt heat storage can out, and the installation of the detection device does not influence the insulation construction and effect of heat storage can, makes heat accumulation
The security performance of tank greatly improves, and here is specific embodiment:
A kind of fused salt heat storage can leak detection apparatus, including by the outside helical arrangement in center in tank bottom first layer heat-barrier material
The optical fiber optical grating array 1 of 2 lower sections, from top to bottom the optical fiber light along tank skin axis direction helical arrangement on the outside of the tank skin in insulating layer
It grid array 1, the circulator of side connection 1 outer end of optical fiber optical grating array, the wideband light source that is connect with the circulator other side and connects
The demodulating system of the optical signal reflected in circulator is received and handles, it is specific as shown in Figure 3.
The optical fiber optical grating array 1 of the utility model uses the concatenated fiber Bragg grating sensor of optical fiber to be several
(FBG), FBG is as a kind of sensor, on the one hand has many advantages, such as corrosion-resistant, electromagnetism interference, small in size, easy networking transmission,
The center reflection wavelength of another aspect FBG has sensitive characteristic to parameters such as temperature, strain, refractive index, and FBG sensor can
To be easily together in series, optical fiber optical grating array 1 is formed, an optical fiber multimetering constitutes distributed detection system, passes through
The reflection center wavelength of light drift value of each point is observed fast and accurately to judge leakage point position.The optical fiber of tank bottom and tank skin
Grating array 1 is arranged in the lower section and tank skin insulating layer of tank bottom first layer heat-barrier material 2, avoids optical fiber optical grating array 1
The outside wall temperature for directly contacting fused salt tank, because of the temperature close of tank wall temperature and fused salt, setting in this way avoids directly measuring outer wall
Temperature and cannot be distinguished fused salt tank whether leak.1 helix of optical fiber optical grating array of tank bottom is snail line, plane
The distance between helix adjacent curve is 0.8~1.0m, and the lead for the spiral that the optical fiber optical grating array 1 of tank skin is arranged is 0.8
~1.0m, such spacing distance can guarantee that the entire of fused salt heat storage can is completely covered in the detection range of optical fiber optical grating array 1
Can body, it is specific as depicted in figs. 1 and 2.Optical fiber is metal coated fiber, the oversheath of the additional stainless steel material of optical fiber, by molten
Melt cladding process and accurately control sputtering furnace power, reactive material flow and optical fiber folding and unfolding speed, so that the sputtering of bare fibre surface is uniform
Clothing layer, refractory metal material tightly overlays on bare fibre, works normally optical fiber at high temperature.Optical fiber optical grating array 1 is in cloth
The absolute growth of optical fiber optical grating array 1 and the corresponding relationship of fused salt tank position are recorded when setting, and when leaking in case of fused salt, are let out
The FBG detecting element of leak source will test temperature change and feed back to circulator, can quickly and accurately be sent out by demodulating system
Now with determine leakage point position.
The demodulating system of the utility model includes the wavelength division multiplexer demodulated to the optical signal reflected in circulator, incites somebody to action
The optical signal that demodulation obtains is converted to the photoelectric receiving tube of electric signal, is acquired the signal condition of processing and amplification to electric signal
Circuit, data collecting card and signal processor.The broadband light that wideband light source issues is incident on fiber grating battle array by circulator
Column 1, the light for meeting Bragg condition will be reflected back toward circulator, be then fed into wavelength division multiplexer and demodulated, and demodulation obtains
Optical signal be converted to electric signal through photoelectric receiving tube, and use signal conditioning circuit, data collecting card and signal processor
Signal is acquired, handle and is amplified.Processor generally selects computer, installs LabVIEW software on computers, which is
For handling the popular software of FGB signal.Above-mentioned wideband light source, circulator and wavelength division multiplexer, light in demodulating system
Electric reception pipe, signal conditioning circuit, data collecting card etc. are commonly used to match with FGB.
The utility model is by that can be used for FGB sensor series forming fibre-optic grating array 1 biggish to volume
The leak point of fused salt heat storage can carries out fast and accurately monitoring positioning.
The fused salt heat storage can leak detection apparatus of the utility model can fast, accurately detect letting out for fused salt heat storage can
Leak source, and the installation of the detection device does not influence the insulation construction and effect of heat storage can, makes the security performance of heat storage can significantly
It improves.Under the premise of not increasing system investments, the accuracy of system, reliability are improved, safety makes engineering design, construction
Debugging, the running fused salt heat storage can leak detection problem in power station are eradicated, and construction investment cost is reduced, and equipment is made to run the longevity
Life lengthens, and the safety of power station operation is improved.
Claims (4)
1. a kind of fused salt heat storage can leak detection apparatus, it is characterised in that: including the light below tank bottom first layer heat-barrier material (2)
Fine grating array (1), the optical fiber optical grating array (1) being arranged in insulating layer along tank skin axis direction, side connect fiber grating
What the circulator of array (1) outer end, the wideband light source connecting with the circulator other side and receiving and processing reflected in circulator
The demodulating system of optical signal；The optical fiber optical grating array (1) uses the concatenated fiber Bragg grating sensor of optical fiber to be several；
The demodulating system includes being sequentially connected the wave for being demodulated to the optical signal reflected in circulator for carrying out information transmitting
Division multiplexer, processing is acquired to electric signal and is put the photoelectric receiving tube that the optical signal that demodulation obtains is converted to electric signal
Big signal conditioning circuit, data collecting card and signal processor；The optical fiber optical grating array (1) of tank bottom is from center to external spiral
It is arranged in below first layer heat-barrier material (2)；Optical fiber optical grating array (1) on the outside of tank skin from top to bottom protect in tank skin by helical arrangement
In warm layer.
2. a kind of fused salt heat storage can leak detection apparatus according to claim 1, it is characterised in that: the fiber grating of tank bottom
Array (1) helix is snail line, and the distance between described snail line adjacent curve is 0.8~1.0m.
3. a kind of fused salt heat storage can leak detection apparatus according to claim 1, it is characterised in that: the fiber grating of tank skin
The lead of the spiral of array (1) arrangement is 0.8~1.0m.
4. a kind of fused salt heat storage can leak detection apparatus according to claim 1, it is characterised in that: the optical fiber is metal
Coated fiber, the oversheath of the additional stainless steel material of optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820887498.1U CN208635974U (en) | 2018-06-08 | 2018-06-08 | A kind of fused salt heat storage can leak detection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820887498.1U CN208635974U (en) | 2018-06-08 | 2018-06-08 | A kind of fused salt heat storage can leak detection apparatus |
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| CN208635974U true CN208635974U (en) | 2019-03-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342130A (en) * | 2019-06-28 | 2019-10-18 | 浙江大学 | A kind of system of the array distributed monitoring fused salt storage tank leakage of thinning FBG |
| CN111879019A (en) * | 2020-06-12 | 2020-11-03 | 浙江大学 | System for detecting fused salt leakage of photo-thermal power generation heat storage device by utilizing electrode plate |
| CN114516499A (en) * | 2022-02-10 | 2022-05-20 | 武汉理工大学 | High-pressure storage tank leakage monitoring method based on grating array stress sensor |
-
2018
- 2018-06-08 CN CN201820887498.1U patent/CN208635974U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342130A (en) * | 2019-06-28 | 2019-10-18 | 浙江大学 | A kind of system of the array distributed monitoring fused salt storage tank leakage of thinning FBG |
| CN111879019A (en) * | 2020-06-12 | 2020-11-03 | 浙江大学 | System for detecting fused salt leakage of photo-thermal power generation heat storage device by utilizing electrode plate |
| CN111879019B (en) * | 2020-06-12 | 2022-03-18 | 浙江大学 | System for detecting fused salt leakage of photo-thermal power generation heat storage device by utilizing electrode plate |
| CN114516499A (en) * | 2022-02-10 | 2022-05-20 | 武汉理工大学 | High-pressure storage tank leakage monitoring method based on grating array stress sensor |
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