CN207569840U - A kind of photo-thermal power station fused salt steam generating system of carrying vapour reheating - Google Patents
A kind of photo-thermal power station fused salt steam generating system of carrying vapour reheating Download PDFInfo
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- CN207569840U CN207569840U CN201721252452.4U CN201721252452U CN207569840U CN 207569840 U CN207569840 U CN 207569840U CN 201721252452 U CN201721252452 U CN 201721252452U CN 207569840 U CN207569840 U CN 207569840U
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Abstract
A kind of photo-thermal power station fused salt steam generating system of carrying vapour reheating, including preheater, steam generator, drum and the superheater set gradually according to device of working medium flow direction, superheater is exported equipped with superheated steam；Hot melt salt each leads into superheater and with the reheater that superheater is set up in parallel, and by steam generator and preheater heat exchange occurs for the hot melt salt for flowing through superheater and reheater, and discharge as sloppy heat salt successively；Superheater and reheater parallel connection can circulate the first bypass of hot melt salt, and steam generator parallel connection can circulate the second bypass of hot melt salt, the first bypass and the second bypass, be equipped with the first valve in the first bypass, the second valve is equipped in the second bypass.First valve is closed when being run under declared working condition with the second valve, is opened when being run under off rating.The risk that steam overtemperature and fused salt solidify in preheater when the utility model can reduce system underrun.
Description
Technical field
The utility model is related to solar light-heat power-generation fields, and in particular to a kind of photo-thermal power station fused salt of carrying vapour reheating
Steam generating system, it is intended to reduce overtemperature risk of the solidification risk and steam in preheater in superheater or reheater.
Background technology
Tower and slot type photo-thermal power generation technology is the solar light-heat power-generation technology of two kinds of commercialization accreditations.Both skills
Art is that solar energy is absorbed in mirror field using heat-storage medium, then in steam generating system by the solar energy of absorption with thermal energy
Form transmit feedwater or steam, and then enter steam turbine generator acting power generation.Due to good physicochemical property, fused salt is through multiple
The photo-thermal power station of comercial operation proves the ripe storage heat transferring medium for being suitable for photo-thermal power generation, is widely used in photo-thermal steam generation
System.
Fig. 1 is the principle sketch of traditional fused salt steam generating system, and feedwater passes sequentially through preheater, steam hair from bottom to top
Raw device, drum and superheater or reheater, hot melt salt is from top to bottom successively along superheater or reheater, steam generator, preheating
Device becomes sloppy heat salt, and feedwater passes through and becomes superheated steam or reheat heat steam after fused salt countercurrent flow, does work into steam turbine.
This system is weaker to the adaptability of load variations, but due to solar energy variability in itself and periodicity, fused salt steam generation
The operation of system frequent varying load condition, conventional vapor generating system is used easily to cause temperature of the fused salt in preheater too low with
And temperature of the steam in superheater or reheater is excessively high.Therefore, there is an urgent need for design a kind of safe and efficient fused salt steam generation
System.
Invention content
It is an object of the invention to the problems in for the above-mentioned prior art, provide a kind of photo-thermal power station of carrying vapour reheating
Fused salt steam generating system, by increasing the bypass of superheater and reheater and the bypass of steam generator, prevent solidification and
Overtemperature risk.
To achieve these goals, the technical solution adopted in the utility model is：Including being set successively according to device of working medium flow direction
Preheater, steam generator, drum and the superheater put, the superheater are exported equipped with superheated steam；Heat salt difference
It is passed through superheater and with the reheater that superheater is set up in parallel, the hot melt salt for flowing through superheater and reheater passes through steam successively
Heat exchange occurs for generator and preheater, and is discharged as sloppy heat salt；The superheater and reheater parallel connection can circulate heat
First bypass of fused salt, steam generator parallel connection, which can circulate, heats the second bypass of salt, the first bypass and the second bypass.
First valve in first bypass is installed, the second valve is installed in the second bypass.
First valve is closed when being run under declared working condition with the second valve, is beaten when being run under off rating
It opens.
Cold reheated steam pipeline and reheat heat steam pipework are connected on the reheater.
Under declared working condition, the feed temperature design value of preheater is 235 DEG C -270 DEG C, the cold reheated steam pipeline of reheater
Design value is 300 DEG C -340 DEG C, and the hot temperature of molten salt of superheater and reheater entrance is 550 DEG C -570 DEG C；The overheat of superheater
The reheat heat steam pipework design steam temperature of steam (vapor) outlet and reheater is 535 DEG C -550 DEG C, and the sloppy heat salt of preheater goes out
Mouth temperature is 290 DEG C -305 DEG C.
Preheater, steam generator and the superheater uses U-tube shell heat exchanger.
Compared with prior art, the utility model has following advantageous effect：By in parallel to superheater and reheater
Can circulate the first bypass of hot melt salt, and steam generator parallel connection can circulate the second bypass of hot melt salt, the first bypass and the
Two bypass when steam generating system is in underrun, are controlled according to load condition into the first bypass fused salt
Flow, can realize control superheater and reheater outlet steam temperature purpose, and then reduce system underrun
When steam overtemperature risk.In addition, controlling the flow into the second bypass fused salt according to load condition, control preheating can be realized
Device exports the purpose of temperature of molten salt, and then reduces solidification risk of the fused salt in preheater.The utility model passes through reasonable distribution
Heat exchange amount of the fused salt in various heat exchange device, is sufficiently used fused salt heat.
Description of the drawings
The existing fused salt steam generating system structure diagrams of Fig. 1；
The system structure diagram of Fig. 2 the utility model.
In figure：1. preheater；2. steam generator；3. drum；4. superheater；5. reheater；6. the first valve；7. second
Valve.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings.Embodiment described herein is only this
The part of the embodiment of utility model, and not all embodiment.Based on the embodiment in the utility model, the common skill in this field
Art personnel all other embodiments obtained under the premise of not making the creative labor belong to the utility model protection model
It encloses.
Referring to Fig. 2, the utility model includes the preheater 1 set gradually according to device of working medium flow direction in structure, steam is sent out
Raw device 2, drum 3 and superheater 4, superheater 4 are exported equipped with superheated steam；Hot melt salt each lead into superheater 4 and with mistake
The reheater 5 that hot device 4 is set up in parallel flows through superheater 4 with the hot melt salt of reheater 5 successively by steam generator 2 and preheating
Heat exchange occurs for device 1, and is discharged as sloppy heat salt；First bypass of can the circulate hot melt salt in parallel with reheater 5 of superheater 4,
2 parallel connection of steam generator, which can circulate, heats the second bypass of salt, the first bypass and the second bypass.
Cold reheated steam pipeline and reheat heat steam pipework are connected on reheater 5.Fused salt working medium is sodium nitrate and potassium nitrate
The two end number mixing fused salt being mixed in a certain ratio.First valve 6 in first bypass is installed, the second valve is installed in the second bypass
Door 7.Preheater 1, steam generator 2 and superheater 4 use U-tube shell heat exchanger.
Embodiment 1
System is in 100% load (declared working condition) operation, and system entry feed temperature is 250 DEG C, the entrance of reheater 5
Cold reheat steam temperature is 320 DEG C.Feedwater is successively by preheater 1, steam generator 2,4/ reheater 5 of superheater, with fused salt
Carry out countercurrent flow.Simultaneity factor entrance temperature of molten salt is 565 DEG C, and countercurrent flow is carried out with carbonated drink working medium.
When Tthe utility model system is run under declared working condition, the first valve 6 and the second valve 7 are closed, system overheat device 4
It is design value (550 DEG C) with 5 outlet steam temperature of reheater；System warm-up device outlet temperature of molten salt is also design value (295
℃)。
For traditional fused salt steam generating system (as shown in Figure 1), when system is run under declared working condition, 4 He of superheater
The outlet steam temperature of reheater 5 and the outlet temperature of molten salt of preheater 1 are in design value.
Under declared working condition, legacy system and this patent system can keep safe and reliable operation.
Embodiment 2
System is in 50% load operation, and system entry feed temperature is 215 DEG C, the cold reheated steam of entrance of reheater 5
Temperature is 331 DEG C.Feedwater by preheater 1, steam generator 2,4/ reheater 5 of superheater, carries out adverse current with fused salt and changes successively
Heat.The temperature of molten salt of simultaneity factor entrance is 565 DEG C, and countercurrent flow is carried out with carbonated drink working medium.
When Tthe utility model system is run in low- load conditions, the first valve 6 and the second valve 7 are opened, by first
The flow rate of molten salt of valve is the 25% of total flow rate of molten salt, and the flow rate of molten salt by the second valve is the 10% of total flow.System
Superheater 4 and 5 outlet steam temperature of reheater are respectively 551 DEG C and 552 DEG C, and system warm-up device outlet temperature of molten salt is 277 DEG C.
For traditional fused salt steam generating system (as shown in Figure 1), when system is run in low- load conditions, superheater 4
Outlet steam temperature with reheater 5 is respectively 558 DEG C and 560 DEG C；The outlet temperature of molten salt of system warm-up device 1 is 258 DEG C.
By comparison, in low- load conditions, the outlet steam temperature of this patent system does not surpass in normal range (NR)
Temperature, system outlet temperature of molten salt is also above fused salt safe temperature (260 DEG C).And the outlet steam temperature of legacy system substantially surpasses
Temperature, and export fused salt and be less than fused salt safe temperature, fused salt has the risk of solidification.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Novel spirit and any modification, equivalent substitution, improvement and etc. within principle, done, should be included in the model of the utility model
Within enclosing.
Claims (6)
1. a kind of photo-thermal power station fused salt steam generating system of carrying vapour reheating, it is characterised in that：Including being flowed to according to device of working medium
Preheater (1), steam generator (2), drum (3) and the superheater (4) set gradually, the superheater (4) were equipped with
Hot steam exports；The reheater (5) that hot melt salt each leads into superheater (4) and is set up in parallel with superheater (4), flows through overheat
By steam generator (2) and preheater (1) heat exchange occurs for device (4) and the hot melt salt of reheater (5), and as sloppy heat successively
Salt is discharged；First bypass of the superheater (4) can circulate hot melt salt in parallel with reheater (5), steam generator (2) is simultaneously
Connection, which can circulate, heats the second bypass of salt, the first bypass and the second bypass.
2. the photo-thermal power station fused salt steam generating system of carrying vapour reheating according to claim 1, it is characterised in that：Described
First valve (6) in the first bypass is installed, the second valve (7) is installed in the second bypass.
3. the photo-thermal power station fused salt steam generating system of carrying vapour reheating according to claim 2, it is characterised in that：Described
First valve (6) is closed when being run under declared working condition with the second valve (7), is opened when being run under off rating.
4. the photo-thermal power station fused salt steam generating system of carrying vapour reheating according to claim 1, it is characterised in that：Described
Cold reheated steam pipeline and reheat heat steam pipework are connected on reheater (5).
5. according to the photo-thermal power station fused salt steam generating system of the carrying vapour reheating of claim 1 or 4, it is characterised in that：Volume
Determine under operating mode, the feed temperature design value of preheater (1) is 235 DEG C -270 DEG C, the cold reheated steam circuit design of reheater (5)
It is 300 DEG C -340 DEG C to be worth, and the hot temperature of molten salt of superheater (4) and reheater (5) entrance is 550 DEG C -570 DEG C；Superheater (4)
Superheated steam exports and the reheat heat steam pipework design steam temperature of reheater (5) is 535 DEG C -550 DEG C, preheater (1)
Sloppy heat salt outlet temperature be 290 DEG C -305 DEG C.
6. the photo-thermal power station fused salt steam generating system of carrying vapour reheating according to claim 1, it is characterised in that：Described
Preheater (1), steam generator (2) and superheater (4) use U-tube shell heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721252452.4U CN207569840U (en) | 2017-09-27 | 2017-09-27 | A kind of photo-thermal power station fused salt steam generating system of carrying vapour reheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721252452.4U CN207569840U (en) | 2017-09-27 | 2017-09-27 | A kind of photo-thermal power station fused salt steam generating system of carrying vapour reheating |
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| CN207569840U true CN207569840U (en) | 2018-07-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566920A (en) * | 2019-09-12 | 2019-12-13 | 哈尔滨锅炉厂有限责任公司 | Groove tower combines steam generation system |
| CN111911893A (en) * | 2019-05-07 | 2020-11-10 | 华北电力大学 | Tower type fused salt photo-thermal power station steam generator system with bypass |
| CN113432099A (en) * | 2021-06-04 | 2021-09-24 | 西安交通大学 | Preheater inlet feed water temperature control system and method in starting process of photo-thermal power station |
-
2017
- 2017-09-27 CN CN201721252452.4U patent/CN207569840U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911893A (en) * | 2019-05-07 | 2020-11-10 | 华北电力大学 | Tower type fused salt photo-thermal power station steam generator system with bypass |
| CN110566920A (en) * | 2019-09-12 | 2019-12-13 | 哈尔滨锅炉厂有限责任公司 | Groove tower combines steam generation system |
| CN113432099A (en) * | 2021-06-04 | 2021-09-24 | 西安交通大学 | Preheater inlet feed water temperature control system and method in starting process of photo-thermal power station |
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