CN207350970U - A kind of fused salt heat dump tube panel preheating and anti-condensation protective device - Google Patents
A kind of fused salt heat dump tube panel preheating and anti-condensation protective device Download PDFInfo
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- CN207350970U CN207350970U CN201720924918.4U CN201720924918U CN207350970U CN 207350970 U CN207350970 U CN 207350970U CN 201720924918 U CN201720924918 U CN 201720924918U CN 207350970 U CN207350970 U CN 207350970U
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- fused salt
- tube panel
- heat dump
- electric
- protective device
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The utility model discloses a kind of preheating of fused salt heat dump tube panel and anti-condensation protective device, belong to solar energy thermal-power-generating field, one layer of electric tracing layer is equipped between heat dump tube panel heat pipe group and the insulation of tube panel back.The utility model overcomes the larger temperature difference and thermal stress that fused salt heat dump warm-up phase uneven heating produces, while avoids occurrence of equipment failure under cloud block operating mode from can not realizing fused salt frozen plug endothermic tube phenomenon caused by fast evacuation.
Description
Technical field
The utility model belongs to solar energy thermal-power-generating field, more particularly to a kind of fused salt heat dump.
Background technology
In tower photo-thermal power station, for heat dump as one of core equipment, its main function is to catch heliostat, instead
Penetrate and be converted into the thermal energy that can efficiently utilize with the solar energy focused on.Wherein, it is known as using the heat dump of fused salt as heat absorption working medium
Fused salt heat dump, for other use such as device of working medium, conduction oil or air are as the system of working media, fused salt is inhaled
Hot systems have operating pressure is small, working medium without phase-change, many advantages such as high density hot-fluid and higher thermal efficiency can be born.In addition,
In view of fused salt can be increasingly becoming photo-thermal power generation as heat absorption, heat accumulation and heat-transfer working medium, current tower fused salt photothermal technique at the same time
One of industry mainstream technology.But for fused salt working medium, there is also a significant drawback in physical property -- solidification point compared with
Height, this is also meaned that when system operating temperatures are near or below its solidification point, and crystallization will occur for internal flow fused salt very
To frozen plug phenomenon, cause equipment damage or system shutdown.At present, photo-thermal power station is commercialized more using tracing system to fused salt
System and equipment are protected, including fused salt connecting pipe, container, valve and necessary instrument instrument etc., its purpose has at 2 points：One
It is to ensure that system operating temperatures are not less than fused salt solidification point；Second, carrying out pre-heating temperature elevation to it at the beginning of salt melting system starts, prevent
Only thermal shock.
It is mainly anti-by Jing Chang at present different from the other regions of salt melting system for fused salt heat dump is heated tube panel
Penetrate light spot radiation and carry out rapidly pre-warming with up to required temperature., may due to mirror field control strategy reason in its rapidly pre-warming stage
Cause tube panel heating surface incidence heat flux distribution uneven, middle high, both ends are low, longitudinally produce the larger temperature difference in endothermic tube and heat should
Power；Secondly, when long-time cloud block need to carry out dredging salt emptying process, such as dredge salt valve break down can not meet demand, then manage
The internal fused salt of screen meeting radiating and cooling under the conditions of altitude low temperature and high wind speed, when temperature is less than solidification point, then can become solid-state and block up
Fill in endothermic tube.Although using the pre- heat fusing fused salt of mirror field hot spot before starting next time, the body caused by the change of fused salt phase
Product expansion can produce pipe larger swelling stress.Therefore, the thermal stress or phase that either heat flux distribution inequality produces
Change produce swelling stress pipe can be caused repeatedly, directly damage so that shorten service life cause it is serious
Economic loss.
Utility model content
The purpose of this utility model is that：It is proposed a kind of fused salt heat dump tube panel preheating and anti-condensation protective device, overcome molten
The larger temperature difference and thermal stress that salt heat dump warm-up phase uneven heating produces, while avoid occurrence of equipment event under cloud block operating mode
Barrier can not realize fused salt frozen plug endothermic tube phenomenon caused by fast evacuation.
The purpose of this utility model is realized by following technical proposals：
A kind of fused salt heat dump tube panel preheating and anti-condensation protective device, are protected in heat dump tube panel heat pipe group and tube panel back
One layer of electric tracing layer is equipped between temperature.
Alternatively, electric tracing layer is made of electric-heating belt.In the program, electric tracing layer can use various electrical heating sides
Formula, preferably electric-heating belt.
As further selection, electric-heating belt is along heated vertical pipe direction transverse direction, snakelike ground nonuniform mutation operator in heat pipe
Group backlight side, and it is closeer along the lower regions in heat pipe direction, intermediate region is relatively dredged.In the program, using electric-heating belt according to
Heat pipe group be heated feature " heat flow density height is born in intermediate region, and quick heating, it is low that heat flow density is born at both ends, and heating is slow " into
Row targetedly designs.
As another further selection, the entrance end of electric-heating belt is connected extraction with terminal box.
Alternatively, protective plate and fixed net are also equipped between heat pipe group and electric tracing layer successively.In the program, to protect
Card tube panel heating uniformity and prevent endothermic tube temperature distortion cause incident light front exposure direct irradiation to electric tracing layer with
On insulating layer, protective plate is used to prevent exposure and be evenly heated, and fixed net is then used to stablize fixed electric tracing layer.
As further selection, band steel plate is further included, band steel plate is fixed with fixed net.In the program, band steel plate is used for solid
Determine electric tracing layer.
Alternatively, some wall temperature measurement points are disposed with the different level of heat pipe group backlight side.In the program, compound wall
Warm measuring point, which can combine photo-thermal power station infrared thermal imagery measuring system, to carry out tube panel wall temperature to monitor and protect in real time.
Alternatively, electric dry oven is further included, it is overall by electric dry oven with expansion bend that fused salt heat dump imports and exports header up and down
Parcel.In the program, since structure is more complicated and space is limited, for reduce normal operation when heat dissipation and ensure start or thin salt
When pre-heating temperature elevation, header and expansion bend heat tracing by the way of electric dry oven.
Alternatively, electric dry oven includes electric dry oven insulation cladding and radiant type electrical heating elements, radiant type electrical heating elements cloth
It is placed in electric dry oven insulation cladding inner surface.In the program, header and expansion bend are integrally wrapped up wherein, in baking oven using baking oven
Surface different parts are by arranging that radiant type electrical heating elements carry out heat temperature raising to it.
The foregoing main scheme of the utility model and its each further selection scheme can be freely combined to form multiple schemes,
The scheme that can be used and be claimed for the utility model；And the utility model, (each non conflicting selection) selection between and
It can also be freely combined between other selections.Those skilled in the art are after the present invention program is understood according to the prior art and public affairs
Know that general knowledge can understand there are multiple combinations, be the claimed technical solution of the utility model, do not do exhaustion herein.
The effect of each component is as follows in the utility model：
The utility model is suitable for the preheating of tower photo-thermal power station fused salt heat dump tube panel and anti-condensation protection；Tower photo-thermal electricity
Fused salt heat dump of standing is made of multiple modular tube panels, and each tube panel that absorbs heat includes endothermic tube, inlet and outlet header, expansion
Elbow and back insulation etc..Lower header is connected with expansion bend in large quantities on heat dump tube panel, the header and swollen in normal operation
Swollen elbow does not receive solar radiation directly.Since structure is more complicated and space is limited, for reduce normal operation when heat dissipation and guarantor
Pre-heating temperature elevation when card startup or thin salt, header are by the way of electric dry oven, i.e., overall by header and expansion bend using baking oven
Wrap up wherein, in baking oven inner surface different parts by arranging that radiant type electrical heating elements carry out heat temperature raising to it.For molten
Salt heat dump is heated for tube panel, its heating surface is divided into light side and backlight side, to light side joint by mirror field light spot radiation, heating tube
Interior flowing fused salt, converts solar energy into working medium thermal energy；Backlight side then lays insulation, scatters and disappears, carries for reducing heating surface heat
Highly endothermic device transformation efficiency；Heated feature when being run according to heat dump tube panel：Bear heat flow density height, heating in intermediate region
Hurry up, it is low that heat flow density is born at both ends, and heating is slow, this programme between tube panel back insulating layer and heat pipe anisotropically, rationally
Ground is disposed with one layer of electric tracing layer, the uniform heating of tube panel and the anti-condensation protection during emergency work condition when starting for heat dump；Inhale
Hot device tube panel heat pipe group is formed by more light pipe close-packed arrays arrangements, to ensure the uniformity of tube panel heating and preventing endothermic tube
Temperature distortion causes incident light front exposure direct irradiation, and to electric tracing layer and insulating layer, electric tracing layer cannot be directly mounted to
The endothermic tube back side is, it is necessary to lay one layer of protective plate (such as high temperature resistant stainless steel) and fixed net (such as wire at the pipe group back side
Net).Protective plate is used to prevent exposure and be evenly heated, fixes net and be then used to fix electric tracing layer (such as electric-heating belt).It is anti-
Only heat dump tube panel is destroyed in normal operation since overtemperature occurs for the error of mirror field scheduling controlling or heat dump failure, in heat dump
The different height of heat pipe backlight side has been evenly arranged multilayer wall temperature measurement point, and joint photo-thermal power station infrared thermal imagery measuring system is to pipe
Screen-wall temperature monitor and protect in real time.
The beneficial effects of the utility model：It is heated feature according to tower photo-thermal power station fused salt heat dump tube panel, this patent side
Case proposes a kind of preheating for tower photo-thermal power station fused salt heat dump tube panel and anti-condensation protection scheme, by tube panel back
Anisotropically, reasonable Arrangement electric tracing layer (such as electric-heating belt) and wall temperature measurement point, for overcoming its warm-up phase uneven heating
The larger temperature difference and thermal stress produced, while avoid producing when occurrence of equipment failure can not realize fast evacuation under cloud block operating mode
Fused salt frozen plug endothermic tube phenomenon, ensure service life of equipment, reduce photo-thermal power station economic loss.
Brief description of the drawings
Fig. 1 is the structure diagram of the fused salt heat dump tube panel of the utility model embodiment；
Fig. 2 is the preheating of fused salt heat dump tube panel and the structure diagram of anti-condensation protective device of the utility model embodiment；
Fig. 3 is the fused salt heat dump tube panel preheating of the utility model embodiment and the cross-section structure signal of anti-condensation protective device
Figure；
Fig. 4 is the partial enlarged view of Fig. 3；
In figure, 1- inlet and outlet header 2- electric dry oven 21- electric dry oven insulation cladding 22- radiant type electrical heating elements 3- is heated
Pipe group 31- expansion bend 4- high temperature resistant stainless steel protective plate 5- high temperature resistant stainless steel silk screen 6- electric-heating belt 61- terminal boxes
7- tube panels back keeps the temperature 8- band steel plate 9- wall temperature measurement points.
Embodiment
The utility model is further described with reference to specific embodiments and the drawings.
Fused salt heat dump tube panel mainly has heat pipe group 3, expansion bend 31, tube panel to import and export header 1 and tube panel up and down
7 composition of back insulation, is shown in Fig. 1；Fused salt heat dump surrounds a regular polygon cylinder by multiple such modularization tube panels；
Referring to Fig. 3, fused salt heat dump is imported and exported header 1 and is connected with expansion bend 31 up and down, should since structure is more complicated and space is limited
Two parts carry out overall parcel heat insulation protecting using electric dry oven 2；Electric dry oven 2 mainly has electric dry oven insulation cladding 21 and radiant type electricity to add
Thermal element 22 forms, and radiant type electrical heating elements 22 are arranged in 2 inner surface difference component of electric dry oven to inlet and outlet header 1 and expansion
Elbow 31 carries out pre-heating temperature elevation and heat radiation protection；Operationally heat flow density height is born in intermediate region to fused salt heat dump tube panel, rises
Warm fast, both ends bear that heat flow density is low, and heating is slow, anti-condensation when uniform heating during to ensure that heat dump starts and emergency work condition
Protection, between heat dump heat pipe group 3 and tube panel back insulation 7 anisotropically, reasonably arranges one layer of electric tracing layer, such as
Preferred electric-heating belt 6 shown in the present embodiment；Electric-heating belt 6 laterally, it is snakelike be arranged in tube panel back, lower regions are closeer, middle
Region is relatively dredged, i.e. spacing A ＜ B ＜ C, can be arranged symmetrically up and down, and entrance end is connected extraction with terminal box 61, sees Fig. 2；Heat dump
Tube panel heat pipe group 3 is formed by more light pipe close-packed arrays arrangements, to ensure the uniformity of tube panel heating and preventing heat pipe group 3
Temperature distortion causes incident light front exposure direct irradiation, and to electric tracing 6 and tube panel back insulation 7, electric-heating belt 6 is not direct
Installation lays one layer of protective plate (preferably high temperature resistant stainless steel protective plate 4) to 3 back side of heat pipe group at 3 back side of heat dump pipe group
And fixed net (preferably high temperature resistant stainless steel silk screen 5)；High temperature resistant stainless steel protective plate 4 is used to prevent exposure and uniformly transfer heat, resistance to
High temperature stainless steel silk screen 5 and band steel plate 8 are used to stablize fixed electric-heating belt 6, see Fig. 2 and Fig. 4；3 backlight side of heat pipe group is not straight
Receive mirror field light spot radiation, multilayer wall temperature measurement point 9 is evenly arranged at its different level, it is red the purpose is to combine photo-thermal power station
Outer thermal imagery measuring system carries out tube panel wall temperature to monitor and protect in real time, sees Fig. 2.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (7)
1. a kind of fused salt heat dump tube panel preheating and anti-condensation protective device, it is characterised in that：In heat dump tube panel heat pipe group and
One layer of electric tracing layer is equipped between the insulation of tube panel back, electric tracing layer is made of electric-heating belt, and electric-heating belt is along heated vertical pipe
Direction laterally, snakelike ground nonuniform mutation operator in heat pipe group backlight side, and, middle area closeer along the lower regions in heat pipe direction
Relatively dredge in domain.
2. fused salt heat dump tube panel preheating as claimed in claim 1 and anti-condensation protective device, it is characterised in that：Electric-heating belt
Entrance end is connected extraction with terminal box.
3. fused salt heat dump tube panel preheating as claimed in claim 1 and anti-condensation protective device, it is characterised in that：Heat pipe group and
Protective plate and fixed net are also equipped between electric tracing layer successively.
4. fused salt heat dump tube panel preheating as claimed in claim 3 and anti-condensation protective device, it is characterised in that：Further include band steel
Plate, band steel plate are fixed with fixed net.
5. fused salt heat dump tube panel preheating as claimed in claim 1 and anti-condensation protective device, it is characterised in that：Heat pipe group is carried on the back
Some wall temperature measurement points are disposed with the different level of light side.
6. fused salt heat dump tube panel preheating as claimed in claim 1 and anti-condensation protective device, it is characterised in that：Further include electric oven
Case, fused salt heat dump are imported and exported header and are integrally wrapped up by electric dry oven with expansion bend up and down.
7. fused salt heat dump tube panel preheating as claimed in claim 1 and anti-condensation protective device, it is characterised in that：Electric dry oven includes
Electric dry oven insulation cladding and radiant type electrical heating elements, radiant type electrical heating elements are arranged in electric dry oven insulation cladding inner surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720924918.4U CN207350970U (en) | 2017-07-27 | 2017-07-27 | A kind of fused salt heat dump tube panel preheating and anti-condensation protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720924918.4U CN207350970U (en) | 2017-07-27 | 2017-07-27 | A kind of fused salt heat dump tube panel preheating and anti-condensation protective device |
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| Publication Number | Publication Date |
|---|---|
| CN207350970U true CN207350970U (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720924918.4U Active CN207350970U (en) | 2017-07-27 | 2017-07-27 | A kind of fused salt heat dump tube panel preheating and anti-condensation protective device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489122A (en) * | 2018-05-23 | 2018-09-04 | 东方电气集团东方锅炉股份有限公司 | A kind of tower type solar fused salt heat dump insulation construction |
| CN109489271A (en) * | 2018-11-22 | 2019-03-19 | 上海电气集团股份有限公司 | A kind of solar energy thermal-power-generating heat-absorption device temperature regulating device and its operation method |
| CN109899997A (en) * | 2019-03-15 | 2019-06-18 | 东方电气集团东方锅炉股份有限公司 | A kind of tower photo-thermal power station heat dump high temperature insulating safeguard structure |
| CN113431978A (en) * | 2021-05-08 | 2021-09-24 | 中国电建集团山东电力建设第一工程有限公司 | Linear Fresnel type photo-thermal power station molten salt pipeline system and electric tracing installation method |
| CN113494780A (en) * | 2020-03-19 | 2021-10-12 | 浙江大学 | Tower type heat absorber heat preservation device and heat preservation method |
| CN114688750A (en) * | 2020-12-28 | 2022-07-01 | 浙江高晟光热发电技术研究院有限公司 | Protection device of tower type solar heat absorber |
-
2017
- 2017-07-27 CN CN201720924918.4U patent/CN207350970U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489122A (en) * | 2018-05-23 | 2018-09-04 | 东方电气集团东方锅炉股份有限公司 | A kind of tower type solar fused salt heat dump insulation construction |
| CN109489271A (en) * | 2018-11-22 | 2019-03-19 | 上海电气集团股份有限公司 | A kind of solar energy thermal-power-generating heat-absorption device temperature regulating device and its operation method |
| CN109899997A (en) * | 2019-03-15 | 2019-06-18 | 东方电气集团东方锅炉股份有限公司 | A kind of tower photo-thermal power station heat dump high temperature insulating safeguard structure |
| CN113494780A (en) * | 2020-03-19 | 2021-10-12 | 浙江大学 | Tower type heat absorber heat preservation device and heat preservation method |
| CN114688750A (en) * | 2020-12-28 | 2022-07-01 | 浙江高晟光热发电技术研究院有限公司 | Protection device of tower type solar heat absorber |
| CN114688750B (en) * | 2020-12-28 | 2023-10-24 | 浙江高晟光热发电技术研究院有限公司 | Protective device of tower type solar heat absorber |
| CN113431978A (en) * | 2021-05-08 | 2021-09-24 | 中国电建集团山东电力建设第一工程有限公司 | Linear Fresnel type photo-thermal power station molten salt pipeline system and electric tracing installation method |
| WO2022237020A1 (en) * | 2021-05-08 | 2022-11-17 | 中国电建集团山东电力建设第一工程有限公司 | Linear fresnel photo-thermal power station molten salt pipe system and electric heat tracing installation method |
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