CN112728781A - Temperature reduction device and slot type photo-thermal power generation system - Google Patents
Temperature reduction device and slot type photo-thermal power generation system Download PDFInfo
- Publication number
- CN112728781A CN112728781A CN202011215281.4A CN202011215281A CN112728781A CN 112728781 A CN112728781 A CN 112728781A CN 202011215281 A CN202011215281 A CN 202011215281A CN 112728781 A CN112728781 A CN 112728781A
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- Prior art keywords
- heat
- pipeline
- temperature
- nozzle
- medium
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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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Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
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- 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
- F24S40/50—Preventing overheating or overpressure
- F24S40/55—Arrangements for cooling, e.g. by using external heat dissipating means or internal cooling circuits
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- 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
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
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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
- Y02E10/44—Heat exchange systems
Abstract
The invention relates to a temperature reducing device which comprises a body, a nozzle arranged in the body, a pipeline with one end communicated with the nozzle, a low-temperature medium source communicated with the other end of the pipeline, and a valve assembly arranged on the pipeline, wherein the two ends of the body are provided with connecting ends communicated with a heat conducting pipe, and low-temperature medium is injected into the body through the nozzle through the pipeline. According to the invention, when the heat conduction pipe is over-heated or cut off, the low-temperature medium can be injected into the desuperheater body through the temperature adjusting nozzle, and then the low-temperature medium and the heat conduction medium in the heat conduction pipe are uniformly mixed through the desuperheater body, so that the effect of emergency cooling is achieved, the problem of over-temperature of the heat collector is prevented, the occurrence of accidents is avoided, and the normal operation of the groove type photo-thermal power generation system is ensured.
Description
Technical Field
The invention belongs to the technical field of photo-thermal power generation, and particularly relates to a temperature reduction device.
Background
The trough type photo-thermal power generation system is a solar thermal power generation system. The heat collector of the groove type photo-thermal power generation system consists of a groove type paraboloid condensing reflector group, the groove type polished surface condensing reflector group is formed by connecting a plurality of condensing grooves 8, as shown in figure 2, sunlight can be focused on a vacuum heat conduction pipe 7 in the center of the paraboloid, a heat conduction medium in the heat conduction pipe 7 is heated, solar energy is converted into heat energy, and then the heat energy is converted into heat energy to heat water to generate superheated steam to drive a steam turbine to generate power.
As shown in fig. 1, in the trough type photothermal power generation system, a heat transfer medium flows in a heat pipe 7 along the arrangement direction of the light collection trough 8, and continuously absorbs energy caused by sunlight reflected by the light collection trough 8, so that the temperature of the medium gradually rises, therefore, in order to fully heat the heat transfer medium in the heat collector, as much as possible, the heat is generated by converting solar energy, often, a group of trough type heat collectors is connected in series so that the length of the group of trough type heat collectors is as long as several kilometers, and then a plurality of groups of heat collectors are arranged in parallel to form a whole, which is called as a light collection system of a trough type photothermal power.
The connection length of the trough collector of the light-gathering and heat-collecting system is long, the diameter of the heat conduction pipe 7 is relatively small, and in actual operation, the condition that the heat conduction medium in the heat conduction pipe 7 flows unevenly or is cut off frequently occurs, so that the phenomenon that the heat conduction pipe 7 is over-heated seriously is caused. The reasons for this phenomenon are various, and it is possible that the heat conducting medium in the heat conducting pipe 7 is blocked due to impurities, or that the flow rate of the heat conducting medium in the pipe is slow to generate a laminar flow phenomenon, or that the resistance design of several parallel groups of heat collectors has deviation to cause non-uniformity of the flow field in the heat conducting pipe 7, and the flow rate in each heat conducting pipe 7 is different, so that the temperature of the medium at the near end does not reach the design temperature, and the medium at the far end may overtemperature. When the heat pipe 7 is cut off, the heat pipe 7 at the downstream of the cut-off point can run in an empty pipe mode, the solar heat collected by the light collecting groove 8 cannot be taken away in time through a medium, the temperature of the heat pipe 7 can be increased, even the heat pipe 7 can be blown in serious conditions, and the heat collecting field device is very dangerous and can generate large safety accidents.
Disclosure of Invention
The invention aims to provide a temperature reducing device which is used for playing a role of emergency temperature reduction when the temperature of a heat conducting pipe is too high.
In order to achieve the purpose, the invention adopts the technical scheme that:
the temperature reduction device comprises a body, a nozzle arranged in the body, a pipeline with one end communicated with the nozzle, a low-temperature medium source communicated with the other end of the pipeline, and a valve assembly arranged on the pipeline, wherein connecting ends communicated with a heat conduction pipe are arranged at two ends of the body, and low-temperature medium is injected into the body through the nozzle through the pipeline.
Preferably, the valve assembly comprises one or more of a stop valve for controlling the opening and closing of the pipeline, a regulating valve for regulating the flow of the low-temperature medium, and a check valve for preventing the heat transfer medium from flowing back into the pipeline.
Further preferably, when the valve assembly simultaneously comprises the stop valve, the regulating valve and the check valve, the stop valve, the regulating valve and the check valve are sequentially arranged on the pipeline along the direction of conveying the low-temperature medium by the pipeline.
Preferably, the temperature reducing device further comprises a filter disposed on the pipeline for filtering impurities in the low temperature medium.
Preferably, the nozzle has a nozzle orifice with an aperture gradually decreasing in the jetting direction.
Further preferably, the spout is a conical spout.
Preferably, the connection end is provided with a connector for connecting with a heat pipe.
Further preferably, the temperature reduction device further comprises a sealing member disposed on a connection surface between the connection end and the heat conductive pipe.
The invention aims to provide a trough type photo-thermal power generation system.
In order to achieve the purpose, the invention adopts the technical scheme that:
the groove type photo-thermal power generation system comprises a heat collecting system, a heat storage and exchange system, a heat conducting oil system and a power generation system, wherein the heat collecting system is provided with a temperature reduction device.
Preferably, the heat collecting system comprises a heat pipe and a plurality of light gathering grooves arranged along the conveying direction of the heat pipe, the heat pipe is arranged above the light gathering grooves, and the temperature reduction device is arranged on the heat pipe between two adjacent light gathering grooves.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the invention, when the heat conduction pipe is over-heated or cut off, the low-temperature medium can be injected into the desuperheater body through the temperature adjusting nozzle, and then the low-temperature medium and the heat conduction medium in the heat conduction pipe are uniformly mixed through the desuperheater body, so that the effect of emergency cooling is achieved, the problem of over-temperature of the heat collector is prevented, the occurrence of accidents is avoided, and the normal operation of the groove type photo-thermal power generation system is ensured.
Drawings
FIG. 1 is a schematic structural view of a temperature reducing device according to this embodiment;
figure 2 is a trough-type solar thermal power generation system.
In the above drawings: 1. a body; 11. a connecting end; 2. a nozzle; 21. a spout; 3. a pipeline; 41. a stop valve; 42. adjusting a valve; 43. a check valve; 5. a filter; 6. a connector; 61. a seal member; 7. a heat conducting pipe; 8. a light-gathering groove; 9. a source of cryogenic medium; a. a heat collection system; b. a heat storage and exchange system; c. a heat transfer oil system; d. a power generation system.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a temperature reducing device comprises a body 1, a nozzle 2 arranged in the body 1, a pipeline 3 for conveying a low-temperature medium into the body 1, a valve assembly arranged on the pipeline 3, and a low-temperature medium source 9, wherein one end of the pipeline 3 is communicated with the nozzle 2, the other end of the pipeline 3 is communicated with the low-temperature medium source 9, two ends of the body 1 are provided with connecting ends 11 communicated with a heat pipe 7, and the low-temperature medium is injected into the body 1 through the nozzle 2 via the pipeline 3.
In this embodiment, the body 1 is a tubular structure for ease of connection. The connectors 6 are respectively arranged on the connecting ends 11 at the two ends of the body 1 and are used for being connected with the heat conduction pipes 7, the sealing elements 61 are arranged on the outer sides of the connectors 6, sealing rings are adopted in the embodiment to seal the connecting positions of the connectors 6 and the heat conduction pipes 7, and the leakage of media at the connecting positions can be effectively prevented.
The valve assembly comprises a stop valve 41, an adjusting valve 42 and a check valve 43 which are sequentially arranged along the conveying direction of the low-temperature medium, wherein the stop valve 41 is used for controlling the on-off of the pipeline 3 for conveying the low-temperature medium, the adjusting valve 42 is used for adjusting the flow rate of the low-temperature medium in the pipeline 3, and the check valve 43 is used for preventing the heat-conducting medium from flowing back into the pipeline.
The desuperheating device further comprises a filter 5 arranged on the pipeline, the filter 5 is used for filtering impurities in the low-temperature medium, the filter 5 is arranged between the stop valve 41 and the regulating valve 42, and the filter 5 adopts a filter screen in the embodiment.
In order to facilitate the ejection of the cryogenic medium and to prevent backflow, the nozzle 2 has a nozzle orifice 21 with a gradually decreasing diameter in the ejection direction, the nozzle orifice 21 being tapered.
As shown in fig. 1 and 2, the groove type photo-thermal power generation system comprises a heat collection system a, a heat storage and exchange system b, a heat conduction oil system c and a power generation system d which are sequentially arranged. The heat collecting system a comprises a heat conducting pipe 7 and a plurality of light gathering grooves 8 arranged along the conveying direction of the heat conducting pipe 7, the heat conducting pipe 7 is arranged above the light gathering grooves 8, and the temperature reducing device is arranged on the heat conducting pipe 7 between two adjacent light gathering grooves 8. The temperature reducing device may be provided every other light collecting groove 8, or may be provided every third or more light collecting grooves 8. The low-temperature medium injection pipelines 3 of the temperature reduction devices arranged in the groove type photo-thermal power generation system are connected in parallel and are respectively connected with the main pipeline under the low-temperature medium source 9 through the pipelines 3. The low-temperature medium is shunted to the pipelines 3 which are correspondingly injected by each low-temperature medium after passing through the low-temperature medium main pipeline, and then flows into the corresponding temperature reduction devices.
The following describes the specific working principle of the present embodiment specifically:
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The temperature reduction device is characterized by comprising a body, a nozzle arranged in the body, a pipeline with one end communicated with the nozzle, a low-temperature medium source communicated with the other end of the pipeline, and a valve assembly arranged on the pipeline, wherein the two ends of the body are provided with connecting ends communicated with a heat conduction pipe, and the low-temperature medium passes through the pipeline and is injected into the body through the nozzle.
2. A desuperheating device according to claim 1, wherein the valve assembly comprises one or more of a shut-off valve for controlling the opening and closing of the pipeline, a regulating valve for regulating the flow rate of the cryogenic medium, and a check valve for preventing the heat transfer medium from flowing back into the pipeline.
3. A desuperheating device according to claim 2, wherein when the valve assembly comprises the stop valve, the regulating valve and the check valve at the same time, the stop valve, the regulating valve and the check valve are arranged on the pipeline in sequence along the direction of conveying the low-temperature medium by the pipeline.
4. A desuperheating device of claim 1, further comprising a filter disposed on the conduit for filtering impurities in the cryogenic medium.
5. A desuperheating device according to claim 1, wherein the nozzle has a nozzle orifice with an aperture gradually decreasing in a spraying direction.
6. A desuperheating device according to claim 5, wherein the spout is a conical spout.
7. A desuperheating device according to claim 1, wherein the connection end is provided with a connector for connection with a heat conducting pipe.
8. A desuperheating device of claim 7, further comprising a seal for disposing on a connection face between the connection end and the thermally conductive pipe.
9. A trough type photo-thermal power generation system comprises a heat collecting system, a heat storage and exchange system, a heat conducting oil system and a power generation system, and is characterized in that the heat collecting system is provided with the temperature reducing device as claimed in any one of claims 1 to 8.
10. The trough type solar-thermal power generation system according to claim 9, wherein the heat collection system comprises a heat pipe, a plurality of light-collecting troughs arranged along the conveying direction of the heat pipe, the heat pipe is arranged above the light-collecting troughs, and the temperature reduction device is arranged on the heat pipe between two adjacent light-collecting troughs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215281.4A CN112728781A (en) | 2020-11-04 | 2020-11-04 | Temperature reduction device and slot type photo-thermal power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215281.4A CN112728781A (en) | 2020-11-04 | 2020-11-04 | Temperature reduction device and slot type photo-thermal power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112728781A true CN112728781A (en) | 2021-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011215281.4A Withdrawn CN112728781A (en) | 2020-11-04 | 2020-11-04 | Temperature reduction device and slot type photo-thermal power generation system |
Country Status (1)
| Country | Link |
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| CN (1) | CN112728781A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202032667U (en) * | 2011-04-16 | 2011-11-09 | 武汉天颖环境工程有限公司 | Integrated preheating and heat exchange system |
| CN203532175U (en) * | 2013-11-14 | 2014-04-09 | 上海电机学院 | Small solar concentrating and heat collection power generation device |
| CN105545618A (en) * | 2014-10-31 | 2016-05-04 | 中广核太阳能开发有限公司 | Parabolic trough solar thermal power generation system and method utilizing fuse salt medium |
| CN208380764U (en) * | 2017-06-29 | 2019-01-15 | 深圳市爱能森科技有限公司 | A kind of Bretton solar-thermal generating system of the improvement based on slot type heliostat |
| CN212870282U (en) * | 2020-07-20 | 2021-04-02 | 苏州西热节能环保技术有限公司 | Emergency temperature reduction device of heat collector of groove type photo-thermal power generation system |
-
2020
- 2020-11-04 CN CN202011215281.4A patent/CN112728781A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202032667U (en) * | 2011-04-16 | 2011-11-09 | 武汉天颖环境工程有限公司 | Integrated preheating and heat exchange system |
| CN203532175U (en) * | 2013-11-14 | 2014-04-09 | 上海电机学院 | Small solar concentrating and heat collection power generation device |
| CN105545618A (en) * | 2014-10-31 | 2016-05-04 | 中广核太阳能开发有限公司 | Parabolic trough solar thermal power generation system and method utilizing fuse salt medium |
| CN208380764U (en) * | 2017-06-29 | 2019-01-15 | 深圳市爱能森科技有限公司 | A kind of Bretton solar-thermal generating system of the improvement based on slot type heliostat |
| CN212870282U (en) * | 2020-07-20 | 2021-04-02 | 苏州西热节能环保技术有限公司 | Emergency temperature reduction device of heat collector of groove type photo-thermal power generation system |
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Application publication date: 20210430 |