CN110530039A - A kind of the fused salt emptying device and method of fused salt linear Fresnel formula heat collector - Google Patents
A kind of the fused salt emptying device and method of fused salt linear Fresnel formula heat collector Download PDFInfo
- Publication number
- CN110530039A CN110530039A CN201910830485.XA CN201910830485A CN110530039A CN 110530039 A CN110530039 A CN 110530039A CN 201910830485 A CN201910830485 A CN 201910830485A CN 110530039 A CN110530039 A CN 110530039A
- Authority
- CN
- China
- Prior art keywords
- fused salt
- heat collector
- linear fresnel
- formula heat
- fresnel formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/40—Preventing corrosion; Protecting against dirt or contamination
- F24S40/42—Preventing condensation inside solar modules
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/60—Arrangements for draining the working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/10—Arrangements for storing heat collected by solar heat collectors using latent heat
-
- 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
- Y02E10/44—Heat exchange systems
Abstract
The invention discloses the fused salt emptying devices and method of a kind of fused salt linear Fresnel formula heat collector, device includes the air compressor, air heater and blowing mechanism being sequentially communicated by gas pipeline, and the outlet side of the blowing mechanism is connected to the fused salt input pipe in fused salt linear Fresnel formula heat collector circuit.When heat collector is stopped work, start above-mentioned apparatus, air is purged by blowing mechanism into fused salt linear Fresnel formula heat collector circuit after compression and heating, liquid fused salt purging is left into thermal-collecting tube, to ensure that in the case that night or other do not absorb heat thermal-collecting tube in substantially without fused salt remain solidify, it is ensured that next time starting when thermal-collecting tube in it is unimpeded.Radiation loss caused by the fused salt anti-condensation mode that forced circulation flows in thermal-collecting tube is avoided, can get higher photo-thermal power generation amount.
Description
Technical field
The invention belongs to solar energy heat utilization technical field more particularly to a kind of fused salt linear Fresnel formula heat collectors
Fused salt emptying device.
Background technique
Country's solar energy thermal-power-generating technical research and project construction have just emerged at present, fused salt linear Fresnel formula solar energy
Heat collection technology route has many advantages, such as that wind resistance is strong, collection thermal stability is good, and has multiple be completed or in the fused salt built both at home and abroad
Linear Fresnel photo-thermal power generation project is indispensable one of the technology path in solar energy thermal-power-generating field.
Since the optically focused precision of fused salt linear Fresnel formula heat collector is relatively slightly lower, the diameter of thermal-collecting tube is 125mm, greatly
In slot type thermal-arrest pipe diameter, heat dissipation area is larger；Meanwhile the freezing point of the Molten Binary Salts for photo-thermal power station at 220 DEG C or
More than, in the case that night or other do not absorb heat, to prevent solidification of the fused salt in thermal-collecting tube, 290 ~ 310 DEG C of fused salt will be
Forced circulation flows in thermal-collecting tube.It is outdoor without heat preservation, the biggish thermal-collecting tube of heat dissipation area, cause the molten of thermal-collecting tube internal circulation flow
The external heat loss through radiation of salt is very huge.According to calculating, the thermal-collecting tube radiation loss of fused salt linear Fresnel formula photo-thermal power generation accounts for heat absorption
25% or more of amount.Can in the case that night or other do not absorb heat, by fused salt safety, appropriate purging leave thermal-collecting tube, avoid
Thermal loss caused by forced circulation, at home and abroad there is no adequate solution schemes.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of fused salt linear Fresnel formula collection
The fused salt emptying device of hot device is remained without fused salt in thermal-collecting tube when keeping stopping work and is solidified, it is ensured that when starting next time in thermal-collecting tube
It is unimpeded.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of fused salt emptying device of fused salt linear Fresnel formula heat collector, including the air pressure being sequentially communicated by gas pipeline
Contracting machine, air heater and blowing mechanism, outlet side and the fused salt linear Fresnel formula heat collector circuit of the blowing mechanism
The connection of fused salt input pipe.
When heat collector is stopped work, start above-mentioned apparatus, air compressor compresses air, compressed air is heated through air again
Device heats and passes through blowing mechanism and purges into fused salt linear Fresnel formula heat collector circuit, and liquid fused salt purging is left thermal-arrest
Pipe, thus ensure that in the case that night or other do not absorb heat thermal-collecting tube in substantially without fused salt remain solidify, it is ensured that next time starting
When thermal-collecting tube in it is unimpeded.Radiation loss caused by the fused salt anti-condensation mode that forced circulation flows in thermal-collecting tube is avoided, it can
Obtain higher photo-thermal power generation amount.Preferably, air heater is it is ensured that compressed air is heated to 280 DEG C or more.
As a further improvement of the above technical scheme:
The blowing mechanism is scavenging conduit, and the highest point of the scavenging conduit is higher than fused salt linear Fresnel formula heat collector circuit
In thermal-collecting tube highest point.Ensure when compressed air decompression, fused salt will not backflow into gas pipeline and solidify, it is defeated to block
Feed channel.
To guarantee purging effect, the scavenging conduit includes tipping tube be connected to fused salt input pipe, the tipping tube with melt
Angle≤45 ° between salt input pipe.
As a kind of specific structure of scavenging conduit, the scavenging conduit further include the ascending tube being connected to gas pipeline, with it is upper
The horizontal tube of row pipe connection, and the down pipe being connected to horizontal tube, the lower end of the down pipe are connected to the upper end of tipping tube.
Ensure that the height of horizontal tube is higher than the height of thermal-collecting tube, prevents fused salt from backflowing.Scavenging conduit material is preferably Heat-Resisting Stainless Steel Tube.
The outer wall of the down pipe and tipping tube is equipped with electric heat tracing device.Keep the temperature of the duct section not less than 280
DEG C, so that a small amount of fused salt into the duct section will not solidify.
The ascending tube is equipped with the first valve close to the position of gas pipeline.To control the input quantity of compressed air.
The tipping tube is equipped with the second valve close to the position of fused salt input pipe.Prevent fused salt from backflowing.
To realize pressure stabilizing, air accumulator is equipped between the air compressor and air heater.
The material of air heater, air accumulator and gas pipeline is preferably the stainless steel of 304 or higher antirust grades, and matches
Drainage measure when having starting, stopping transport.0.8MPa or more, outlet temperature are reached by the compressed air pressure after air heater
Reach 280 DEG C or more.
The preferred screw rod of air compressor is without oil type air compressor, and the cooling device without postposition, outlet pressure reach
0.8MPa or more, outlet temperature reach 120 DEG C or more；It is preferred that screw rod oil-free air compressor configures 2 or more, guarantee 1 is standby
With.
The blowing mechanism is equipped with multiple, multiple circuits one of multiple blowing mechanisms and fused salt linear Fresnel formula heat collector
One is corresponding.
The inventive concept total as one utilizes above-mentioned fused salt linear Fresnel formula heat collector the present invention also provides a kind of
Fused salt emptying device carry out fused salt emptying method, comprising the following steps:
S1: air is forced into >=0.8MPa through air compressor, then is heated to >=280 DEG C through air heater；
S2: entered in fused salt linear Fresnel formula heat collector circuit through step S1 treated air by blowing mechanism, and will
Fused salt purging outflow thermal-collecting tube.
Compared with the prior art, the advantages of the present invention are as follows:
1, it may make oil-free compressed air to be pressurized by the present apparatus and method, be heated to fused salt freezing point or more, purging is extremely
Fused salt linear Fresnel formula heat collector circuit, fused salt will not be by the lubricant pollution of conventional air compressor machine, and can effectively will rapidly
Liquid fused salt purging leaves thermal-collecting tube.
2, the present apparatus effectively can avoid fused salt from backflowing into compressed air pipe, be backflowed on a small quantity to the fused salt of blowing mouth
There can also be certain fault-tolerance by the electric heat tracing device heat preservation of part without solidifying.
3, by the present apparatus, in the case that night or other do not absorb heat, the fused salt in thermal-collecting tube can quickly, properly be blown
It is swept in fused salt main pipe, substantially reduces unnecessary radiation loss, increase effective heat-collecting capacity and reach 25% or more.
4, the component devices of the present apparatus, component relative maturity, the cost of Processes and apparatus are far smaller than increased power generation effect
Benefit, economy are strong.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the fused salt emptying device of the fused salt linear Fresnel formula heat collector of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the scavenging conduit in the embodiment of the present invention.
Marginal data: 1, air compressor；2, air accumulator；3, air heater；4, gas pipeline；5, the first valve；6, it blows
Sweep pipe；61, tipping tube；62, down pipe；63, horizontal tube；64, ascending tube；7, the second valve；8, electric heat tracing device；9, circuit；91,
Fused salt input pipe；92, thermal-collecting tube.
Specific embodiment
Below in conjunction with specific preferred embodiment, the invention will be further described, but not thereby limiting the invention
Protection scope.
Embodiment 1:
As depicted in figs. 1 and 2, the fused salt emptying device of the fused salt linear Fresnel formula heat collector of the present embodiment, including successively lead to
Air compressor 1, air accumulator 2 and the air heater 3 of piping connection, the compressed air in air accumulator 2 pass through gas pipeline 4
Multiple scavenging conduits 6 are delivered to, multiple circuits 9 of multiple scavenging conduits 6 and fused salt linear Fresnel formula heat collector correspond.
Scavenging conduit 6 include the tipping tube 61 being connected to fused salt input pipe 91, the ascending tube 64 being connected to gas pipeline 4, with
The horizontal tube 63 that ascending tube 64 is connected to, and the down pipe 62 being connected to horizontal tube 63, the lower end of down pipe 62 and tipping tube 61
Upper end connection.Ascending tube 64 is equipped with the first valve 5 close to the position of gas pipeline 4, and tipping tube 61 is close to fused salt input pipe 91
Position is equipped with the second valve 7.Wherein, the highest point of scavenging conduit 6 is higher than the thermal-collecting tube in fused salt linear Fresnel formula heat collector circuit 9
92 highest point, that is, the height of horizontal tube 63 is greater than the height of thermal-collecting tube 92.Also, tipping tube 61 and fused salt input pipe 91
Between angle≤45 °.
The outer wall of down pipe 62 and tipping tube 61 is equipped with electric heat tracing device 8.Specifically, as shown in Fig. 2, electric heat tracing device
8 electric-heating belt is wound on the tube wall of down pipe 62 and tipping tube 61.
Air through air compressor 1 and air heater 3 be successively pressurized to 0.8MPa or more, be heated to 280 DEG C with
On, and pressure stabilizing is carried out by air accumulator 2；It is sent by gas pipeline 4 to fused salt linear Fresnel formula heat collector circuit 9, point
Not via the first valve 5(purge pipeline compressed air valve), scavenging conduit 6, the second valve 7(purge pipeline fused salt valve), electric heat tracing device
8, with 45 ° or in lower blowing angle access fused salt linear Fresnel formula heat collector circuit 9.Compressed air has 280 DEG C of temperature
Degree can melt a small amount of fused salt, while can using its pressure that fused salt is safe, rapid purging outflow thermal-collecting tube.It is set at scavenging conduit 6
The high point for setting purging pipeline can ensure that compression is empty higher than the height of the thermal-collecting tube 92 in fused salt linear Fresnel formula heat collector circuit 9
When gas decompression, fused salt reflux will not enter circuit and purge pipeline scavenging conduit 6, cause fused salt solidification, blocking.
The above is only the preferred embodiment of the application, not does any type of limitation to the application, although the application with
Preferred embodiment discloses as above, however not to limit the application, any person skilled in the art is not departing from this
In the range of applying for technical solution, a little variation or modification are made using the technology contents of the disclosure above and is equal to equivalent reality
Case is applied, is belonged in technical proposal scope.
Claims (10)
1. a kind of fused salt emptying device of fused salt linear Fresnel formula heat collector, which is characterized in that including passing through gas pipeline (4)
Air compressor (1), air heater (3) and the blowing mechanism being sequentially communicated, the outlet side of the blowing mechanism and fused salt line
Property Fresnel heat collector circuit (9) fused salt input pipe (91) connection.
2. the fused salt emptying device of fused salt linear Fresnel formula heat collector according to claim 1, which is characterized in that described
Blowing mechanism is scavenging conduit (6), and the highest point of the scavenging conduit (6) is higher than fused salt linear Fresnel formula heat collector circuit
(9) highest point of the thermal-collecting tube (92) in.
3. the fused salt emptying device of fused salt linear Fresnel formula heat collector according to claim 1, which is characterized in that described
Scavenging conduit (6) includes the tipping tube (61) being connected to fused salt input pipe (91), the tipping tube (61) and fused salt input pipe (91)
Between angle≤45 °.
4. the fused salt emptying device of fused salt linear Fresnel formula heat collector according to claim 1, which is characterized in that described
Scavenging conduit (6) further includes the ascending tube (64) being connected to gas pipeline (4), the horizontal tube (63) being connected to ascending tube (64), with
And the down pipe (62) being connected to horizontal tube (63), the lower end of the down pipe (62) are connected to the upper end of tipping tube (61).
5. the fused salt emptying device of fused salt linear Fresnel formula heat collector according to claim 4, which is characterized in that described
The outer wall of down pipe (62) and tipping tube (61) is equipped with electric heat tracing device (8).
6. the fused salt emptying device of fused salt linear Fresnel formula heat collector according to claim 4, which is characterized in that described
Ascending tube (64) is equipped with the first valve (5) close to the position of gas pipeline (4).
7. the fused salt emptying device of fused salt linear Fresnel formula heat collector according to claim 4, which is characterized in that described
Tipping tube (61) is equipped with the second valve (7) close to the position of fused salt input pipe (91).
8. the fused salt emptying device of fused salt linear Fresnel formula heat collector according to claim 1-7, feature
It is, is equipped with air accumulator (2) between the air compressor (1) and air heater (3).
9. the fused salt emptying device of fused salt linear Fresnel formula heat collector according to claim 1-7, feature
It is, the blowing mechanism is equipped with multiple, multiple circuits (9) one of multiple blowing mechanisms and fused salt linear Fresnel formula heat collector
One is corresponding.
10. a kind of fused salt emptying device using such as the described in any item fused salt linear Fresnel formula heat collectors of claim 1-9
The method for carrying out fused salt emptying, which comprises the following steps:
S1: air is forced into >=0.8MPa through air compressor (1), then is heated to >=280 DEG C through air heater (3)；
S2: being entered in fused salt linear Fresnel formula heat collector circuit (9) through step S1 treated air by blowing mechanism, and
Fused salt is purged into outflow thermal-collecting tube (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830485.XA CN110530039A (en) | 2019-09-04 | 2019-09-04 | A kind of the fused salt emptying device and method of fused salt linear Fresnel formula heat collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830485.XA CN110530039A (en) | 2019-09-04 | 2019-09-04 | A kind of the fused salt emptying device and method of fused salt linear Fresnel formula heat collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110530039A true CN110530039A (en) | 2019-12-03 |
Family
ID=68666624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910830485.XA Pending CN110530039A (en) | 2019-09-04 | 2019-09-04 | A kind of the fused salt emptying device and method of fused salt linear Fresnel formula heat collector |
Country Status (1)
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| CN (1) | CN110530039A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857906A (en) * | 2011-09-06 | 2014-06-11 | 巴斯夫欧洲公司 | Pipeline system and method for emptying a pipeline system |
| CN203837309U (en) * | 2014-05-09 | 2014-09-17 | 淮南中科储能科技有限公司 | Fused salt self-evacuating system for photo-thermal power generation |
| WO2015146700A1 (en) * | 2014-03-28 | 2015-10-01 | 千代田化工建設株式会社 | Heat-medium discharge device |
| CN105298554A (en) * | 2015-01-04 | 2016-02-03 | 中国大唐集团新能源股份有限公司 | Compressed air energy storage power generation system |
| CN207881262U (en) * | 2018-01-24 | 2018-09-18 | 哈尔滨汽轮机厂辅机工程有限公司 | A kind of fused salt tank circuit purging and pre-heating system for solar light-heat power-generation |
| CN108870787A (en) * | 2018-07-16 | 2018-11-23 | 东方电气集团东方锅炉股份有限公司 | A kind of tower fused salt heat dump compressed air system |
| CN109489277A (en) * | 2017-09-10 | 2019-03-19 | 甘肃光热发电有限公司 | Heat collecting field gravity type salt discharge device and Salt discharge method |
| CN210399547U (en) * | 2019-09-04 | 2020-04-24 | 中国电建集团中南勘测设计研究院有限公司 | Fused salt emptying device of fused salt linear Fresnel type heat collector |
-
2019
- 2019-09-04 CN CN201910830485.XA patent/CN110530039A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857906A (en) * | 2011-09-06 | 2014-06-11 | 巴斯夫欧洲公司 | Pipeline system and method for emptying a pipeline system |
| WO2015146700A1 (en) * | 2014-03-28 | 2015-10-01 | 千代田化工建設株式会社 | Heat-medium discharge device |
| CN203837309U (en) * | 2014-05-09 | 2014-09-17 | 淮南中科储能科技有限公司 | Fused salt self-evacuating system for photo-thermal power generation |
| CN105298554A (en) * | 2015-01-04 | 2016-02-03 | 中国大唐集团新能源股份有限公司 | Compressed air energy storage power generation system |
| CN109489277A (en) * | 2017-09-10 | 2019-03-19 | 甘肃光热发电有限公司 | Heat collecting field gravity type salt discharge device and Salt discharge method |
| CN207881262U (en) * | 2018-01-24 | 2018-09-18 | 哈尔滨汽轮机厂辅机工程有限公司 | A kind of fused salt tank circuit purging and pre-heating system for solar light-heat power-generation |
| CN108870787A (en) * | 2018-07-16 | 2018-11-23 | 东方电气集团东方锅炉股份有限公司 | A kind of tower fused salt heat dump compressed air system |
| CN210399547U (en) * | 2019-09-04 | 2020-04-24 | 中国电建集团中南勘测设计研究院有限公司 | Fused salt emptying device of fused salt linear Fresnel type heat collector |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20191203 |