CN217654122U - Fused salt heat storage device and photo-thermal power generation system - Google Patents
Fused salt heat storage device and photo-thermal power generation system Download PDFInfo
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- CN217654122U CN217654122U CN202220794715.9U CN202220794715U CN217654122U CN 217654122 U CN217654122 U CN 217654122U CN 202220794715 U CN202220794715 U CN 202220794715U CN 217654122 U CN217654122 U CN 217654122U
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- 150000003839 salts Chemical class 0.000 title claims abstract description 39
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 38
- 238000010248 power generation Methods 0.000 title claims abstract description 26
- 238000005338 heat storage Methods 0.000 title claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000033228 biological regulation Effects 0.000 description 5
- 230000002035 prolonged Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000002209 hydrophobic Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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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
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
The utility model discloses a fused salt heat-retaining device, including the hot jar of storing high temperature fused salt, cold jar, over heater, evaporimeter, pre-heater and the medium temperature jar of storing low temperature fused salt, the export in thermal-arrest mirror field is connected to the hot jar, the cold jar is connected the entry in thermal-arrest mirror field, the hot jar with over heater, evaporimeter and pre-heater are connected gradually through the pipeline between the cold jar, the entry of medium temperature jar passes through the pipe connection the export in thermal-arrest mirror field, the export of medium temperature jar with connect gradually through the pipeline between the cold jar the over heater the evaporimeter reaches the pre-heater makes water form steam flow through turbine system after the fused salt flows through over heater, evaporimeter and pre-heater heat transfer to disclose the light and heat power generation system that corresponds with the device, can improve the continuous operation duration of light and heat power station, avoid opening and stop frequent scheduling problem, improved the heat economy nature of light and heat power station, stabilized power output, increased the flexibility of light and heat peak shaving.
Description
Technical Field
The utility model relates to a solar-thermal power generation technical field especially relates to a fused salt heat-retaining device and solar-thermal power generation system.
Background
The photo-thermal power generation is a renewable energy power generation mode integrating clean power generation and large-scale environment-friendly energy storage, has the characteristics of stable and reliable power output, flexible adjustment and the like, but solar energy also has the characteristic of intermittence and is greatly influenced by weather, so that the running time of a photo-thermal power station is prolonged, and the stability and the flexibility of the photo-thermal power generation are increased, thereby having important functions.
However, the conventional photo-thermal power generation system is affected by regions and weather, so that the photo-thermal power station cannot continuously operate for a long time, that is, a series of problems such as frequent start and stop of the photo-thermal power generation unit, long-time low-load operation and the like are caused, the service life of the steam turbine is prolonged, and the thermal economy is reduced.
The conventional photo-thermal power generation system as shown in fig. 1 mainly includes the following three systems:
(1) A heat collection system comprising a heat collection mirror field;
(2) The heat storage system comprises a hot tank for storing high-temperature molten salt, a cold tank for storing low-temperature molten salt, a superheater, an evaporator and a preheater, the hot tank is connected with an outlet of a heat collecting mirror field, the cold tank is connected with an inlet of the heat collecting mirror field, and the superheater, the evaporator and the preheater are sequentially connected between the hot tank and the cold tank through pipelines;
(3) The steam turbine system comprises a steam turbine, a generator, a heater and other components;
fused salt of the photo-thermal power generation system circulates in a heat collection system and a heat storage system, the fused salt forms steam through a steam turbine system after passing through a superheater, an evaporator and a preheater for heat exchange, and the heat storage system only comprises a hot tank and a cold tank, and the direct solar radiation conditions are inconsistent and are different especially in daytime and evening, so that the problem that how to improve the running time of the photo-thermal power generation is the problem which needs to be faced is solved, the continuous running time of the photo-thermal power generation is improved, namely, the adaptability to the electricity demand is improved, the thermal economy of the photo-thermal power station is improved, and the flexibility of peak regulation of the photo-thermal power station is improved.
Disclosure of Invention
An object of the utility model is to provide a fused salt heat-retaining device to extension light and heat power generation system's continuous operation duration.
Based on the above purpose, the utility model adopts the following technical scheme:
the utility model provides a fused salt heat-retaining device, is including the hot jar of storing high temperature fused salt, the cold jar of storing low temperature fused salt, over heater, evaporimeter and pre-heater, the export in thermal-arrest mirror field is connected to the hot jar, the cold jar is connected the entry in thermal-arrest mirror field, the hot jar with connect gradually through the pipeline between the cold jar the over heater the evaporimeter reaches the pre-heater still includes the warm jar, the entry of warm jar passes through the pipe connection the export in thermal-arrest mirror field, the export of warm jar with connect gradually through the pipeline between the cold jar the over heater the evaporimeter reaches the pre-heater.
Need not to change original light and heat power generation station's foundation structure, set up the middle temperature jar again on original hot jar and cold jar's basis, fused salt through in middle temperature jar and the hot jar flows through the over heater, make water form steam turbine system that flows through after evaporimeter and the pre-heater heat transfer, can improve the continuous operation duration of light and heat power generation station, avoid opening and close frequent scheduling problem, the heat economy nature in light and heat power station has been improved, electric power output has been stabilized, the flexibility of light and heat power generation station peak regulation has been increased.
As a further scheme, the molten salt heat storage device further comprises a temperature flow controller, the temperature flow controller is arranged at an outlet of the heat collecting mirror field, and the medium temperature tank is connected with the outlet of the heat collecting mirror field through the temperature flow controller.
The temperature flow controller is used for controlling the flow proportion of the hot tank and the medium temperature tank according to the temperature, and can also control the valve according to the temperature, so that the valve opens or closes the inlet of the hot tank or the branch outlet of the medium temperature tank.
As a further scheme, the molten salt heat storage device further comprises an electric heater, and the electric heater is arranged in the medium-temperature tank.
The electric heater is used for preventing the molten salt in the intermediate temperature tank from being solidified in extreme weather and keeping the lowest temperature of the molten salt.
As a further scheme, the molten salt heat storage device further comprises a temperature measuring device and a temperature sensor, wherein the temperature sensors are arranged on an outlet pipeline of the heat collecting mirror field, and the temperature measuring device is used for measuring the temperature of the temperature sensor.
And the control of the molten salt heat storage device is facilitated through a specific measurement result of the temperature.
What correspond with above-mentioned fused salt heat-retaining device is a light and heat power generation system, light and heat power generation system includes solar collecting system, heat-retaining system, steam turbine system, solar collecting system includes the thermal-collecting mirror field, the heat-collecting mirror field is connected the heat-retaining system, the heat-retaining system is connected the steam turbine system, the heat-retaining system includes foretell fused salt heat-retaining device.
As a further scheme, the pre-heater includes primary preheater and secondary preheater, the secondary preheater is located the evaporimeter with between the cold jar, the export of steam turbine system is equipped with external steam cooler, primary preheater locates external steam cooler with between the secondary preheater and with the well warm-water storage passes through the pipe connection.
The pre-heater includes once behind pre-heater and the secondary pre-heater, can form tertiary preheating with external steam cooler combination, and external steam cooler, one-level preheat and second grade are preheated respectively, can furthest improve the efficiency between steam turbine system and the heat-retaining system, and the fused salt heat in the waste heat and the well warm braw more make full use of has improved whole light and heat generation system's heat exchange efficiency.
The utility model discloses the beneficial effect who realizes:
the utility model discloses a set up the mesophilic tank, need not to change the foundation structure of original light and heat power station, provide the heat source for the steady operation of steam turbine jointly through mesophilic tank and heat jar, can improve the operating duration of light and heat power station, avoid opening and stop frequent scheduling problem, improved the heat economy nature of light and heat power station, stabilized power output, increased the flexibility of light and heat power station peak regulation.
Drawings
FIG. 1 is a prior art solar-thermal power generation system;
fig. 2 shows a photo-thermal power generation system of the present invention.
Wherein: 1 heat collecting mirror field, 2 cold tanks, 3 high pressure heaters, 4 high pressure heaters, 5 high pressure heaters, 6 deaerators, 7 low pressure heaters, 8 low pressure heaters, 9 low pressure heaters, 10 low pressure heaters, 11 hydrophobic coolers, 12 generators, 13 medium and low pressure cylinders, 14 high pressure cylinders, 15 reheaters, 16 external steam coolers, 17 primary preheaters, 18 secondary preheaters, 19 evaporators, 20 superheaters, 21 hot tanks, 22 intermediate temperature tanks, 23 temperature flow controllers, 24 valves, 25 temperature measuring devices, 100 sun.
Detailed Description
The specific implementation mode is as follows:
(1) As shown in FIG. 2, under the condition of thermal rate Acceptance (THA), when THA is 100%, the direct radiation of the sun 100 is (400-850W/m) 2 ) Heat is collected by the solar collector field 1. At this time, the outlet temperature in the outlet pipeline of the heat collecting mirror field 1 is monitored by the temperature measuring device 25, and is transmitted to the temperature flow controller 23 in front of the inlet of the medium temperature tank 22, and the flow entering the medium temperature tank 22 is adjusted. The direct solar radiation is 400-850W/m 2 Under the regulation of the temperature flow controller 23, 1/5 of molten salt enters the medium-temperature tank 22, and 4/5 of molten salt enters the hot tank 21. At this time, the hot tank 21 provides the main heat, and the hot tank 21 is divided into two branches, wherein one branch flows through the reheater 15 to reheat the steam turbine 14 and then returns to the evaporator 19 to be merged with the other branch; the other branch passes through a superheater 20, an evaporator 19 and a secondary preheater 18 and is returned to the cold tank 2. The outlet of the medium temperature tank 22 is divided into two branches, and the valve of the upper branch is controlled to be closed by a temperature measuring device 25; the lower branch flows through the primary preheater 17 to heat the turbine return water, and then returns to the cold tank 2, and the molten salt in the cold tank is heated again through the heat collecting mirror field 1 to further work in a circulating mode. The main part of the first stage bleed air of the turbine high pressure cylinder 14 enters into the reheat steam 15 for reheating and then is sent into the medium and low pressure cylinder 13 for doing work; the other part enters the high-pressure heater 3; the second stage of the extracted air of the high-pressure cylinder of the steam turbine enters a high-pressure heater 4; the first-stage pumping air of the medium-low pressure cylinder 13 enters the high-pressure heater 5 through the external cooler 16; and finally enters the deaerator 6. The second stage of the pumping air of the medium and low pressure cylinder 13 enters the low pressure heater 7; the third stage of the medium and low pressure cylinder 13 is pumped into the low pressure heater 8; the fourth stage of the medium and low pressure cylinder 13 exhausts air to enter the low pressure heater 9; the fifth stage of the low-pressure cylinder 13 is pumped into the low-pressure heater 10; the steam discharged by the medium and low pressure cylinder 13 enters the drain cooler 11 and flows through the low pressure heaters 7, 8, 9 and 10 to enter the deaerator 6. The high-pressure cylinder air exhaust and the medium-low pressure cylinder air exhaust flow from the deaerator 6 to the high-pressure cylinder 14 through the high-pressure heaters 5, 4 and 3, the external cooler 16, the primary preheater 17, the secondary preheater 18, the evaporator 19 and the superheater 20 to do work circularly.
The direct solar radiation shown in figure 2 is (0-400W/m) 2 ) While passing through the heat collecting mirror field 1. The turbine operates at THA50% operating conditions. At the moment, the outlet temperature in the outlet pipeline of the heat collecting mirror field 1 is monitored by the temperature measuring device 25 and is transmitted to the valve in front of the inlet of the hot tank 21, so that the valve is completely closed, the molten salt completely enters the intermediate temperature tank 22, the branch valve on the intermediate temperature tank is completely opened, the intermediate temperature tank is used as a heat source, and the circulation process of the step (1) is repeated.
The third step is that when the direct solar radiation is (400-850W/m) as shown in figure 2 2 ) Time of flightThe energy radiated by the sun 100 is monitored by the temperature measuring device 25 through the outlet temperature in the outlet pipeline of the heat collecting mirror field 1, and is transmitted to the temperature flow controller 23 in front of the inlet of the intermediate temperature tank 22, and the flow entering the intermediate temperature tank 22 is adjusted. The direct solar radiation is 400-850W/m 2 Under the regulation of the temperature flow controller 23, 1/5 of molten salt enters the medium-temperature tank 22, and 4/5 of molten salt enters the hot tank 21. The hot tank is used as the main heat source, and the medium temperature tank 22 is used as the standby heat source. The photothermal power station according to the conventional fully decoupled operation mode operates as shown in FIG. 1 when the direct solar radiation is 0-400W/m 2 And (3) the heat tank is not enough to maintain the long-time operation of the steam turbine, or only the low-load operation can be performed, the medium-temperature tank and the heat tank are used as a heat source to maintain the stable operation of the steam turbine, the electric heater is started to increase the temperature of the molten salt in the medium-temperature tank, and the cyclic operation in the step (1) is repeated.
Finally, it should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, and that modifications of equivalent forms to those skilled in the art after reading the present invention are intended to fall within the scope of the appended claims.
Claims (6)
1. The utility model provides a fused salt heat-retaining device, is including the hot jar of storing high temperature fused salt, the cold jar of storing low temperature fused salt, over heater, evaporimeter and pre-heater, the export in thermal-arrest mirror field is connected to the hot jar, the cold jar is connected the entry in thermal-arrest mirror field, the hot jar with connect gradually through the pipeline between the cold jar the over heater the evaporimeter reaches the pre-heater, its characterized in that still includes the medium temperature jar, the entry in medium temperature jar passes through the pipe connection the export in thermal-arrest mirror field, the export in medium temperature jar with connect gradually through the pipeline between the cold jar the over heater the evaporimeter reaches the pre-heater.
2. The molten salt heat storage device of claim 1, further comprising a temperature flow controller, wherein the temperature flow controller is arranged at an outlet of the heat collecting mirror field, and the intermediate temperature tank is connected with the outlet of the heat collecting mirror field through the temperature flow controller.
3. A molten salt heat storage device as claimed in claim 1, further comprising an electric heater provided in the intermediate temperature tank.
4. The molten salt heat storage device according to any one of claims 1 to 3, further comprising a temperature measuring device and a temperature sensor, wherein the temperature sensor is arranged on an outlet pipeline of the heat collecting mirror field, and the temperature measuring device is used for measuring the temperature of the temperature sensor.
5. A photo-thermal power generation system comprises a heat collection system, a heat storage system and a steam turbine system, wherein the heat collection system comprises a heat collection mirror field, the heat collection mirror field is connected with the heat storage system, the heat storage system is connected with the steam turbine system, and the photo-thermal power generation system is characterized by comprising the molten salt heat storage device as claimed in any one of claims 1 to 4.
6. The photothermal power generation system according to claim 5, wherein said preheater comprises a primary preheater and a secondary preheater, said secondary preheater is disposed between said evaporator and said cold tank, an external steam cooler is disposed at the outlet of said steam turbine system, and said primary preheater is disposed between said external steam cooler and said secondary preheater and connected to said medium temperature tank through a pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220794715.9U CN217654122U (en) | 2022-04-07 | 2022-04-07 | Fused salt heat storage device and photo-thermal power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220794715.9U CN217654122U (en) | 2022-04-07 | 2022-04-07 | Fused salt heat storage device and photo-thermal power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217654122U true CN217654122U (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220794715.9U Active CN217654122U (en) | 2022-04-07 | 2022-04-07 | Fused salt heat storage device and photo-thermal power generation system |
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| Country | Link |
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| CN (1) | CN217654122U (en) |
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2022
- 2022-04-07 CN CN202220794715.9U patent/CN217654122U/en active Active
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