CN217004408U - Fused salt energy storage degree of depth peak shaving system suitable for thermal power factory - Google Patents
Fused salt energy storage degree of depth peak shaving system suitable for thermal power factory Download PDFInfo
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- CN217004408U CN217004408U CN202220241958.XU CN202220241958U CN217004408U CN 217004408 U CN217004408 U CN 217004408U CN 202220241958 U CN202220241958 U CN 202220241958U CN 217004408 U CN217004408 U CN 217004408U
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- heater
- steam
- molten salt
- energy storage
- thermal power
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- 150000003839 salts Chemical class 0.000 title claims abstract description 52
- 238000004146 energy storage Methods 0.000 title claims abstract description 13
- 238000010248 power generation Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005338 heat storage Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model belongs to the peak regulation technology of a thermal power plant, and particularly relates to a fused salt energy storage depth peak regulation system suitable for the thermal power plant. Utility model reduces the boiler load to minimum time, can extract partial main steam and carry out the energy storage, reduces the steam admission volume of steam turbine, and the power generation load can be dropped to 20%, solves the boiler and the minimum load mismatching problem of steam turbine.
Description
Technical Field
The utility model belongs to a peak shaving technology of a thermal power plant, and particularly relates to a fused salt energy storage deep peak shaving system suitable for the thermal power plant.
Background
Under the current power situation, new energy power generation is rapidly developed, the functions of a thermal power plant are gradually changed from power generation and peak shaving to power generation with the peak shaving as a main part as an auxiliary part, the utilization hours are continuously reduced, and the energy consumption is increased; meanwhile, in a spot transaction mode, the zero-electricity price/low-electricity price internet access situation often occurs, and the economic benefit is reduced. At present, the peak regulation depth of a thermal power plant is generally 30% of that of a circulating fluidized bed unit and 40% of that of a pulverized coal furnace unit, the problem of unstable boiler combustion is faced by continuous deep regulation, and particularly, supercritical and ultra-supercritical units are faced with the problem of state transition. The load of the boiler can not be reduced and the deep peak regulation is continued to form a new technical problem.
The high-temperature molten salt energy storage technology generally adopts binary salt (60% NaNO3+ 40% KNO3), the heat storage medium has a wide heat storage temperature range, the temperature is solidified below 240 ℃, the temperature is decomposed above 600 ℃, when the sensible heat is used for heat storage, the safe use temperature range is 290-565 ℃, and the available temperature difference is large. In addition, the heat storage mass density is high (about five times of that of water with the same volume), the fluidity and the heat exchange performance in a melting state are good, the property is stable, and the service life is as long as more than 30 years.
The main bodies of the thermal generator sets in service in China are subcritical, supercritical and ultra-supercritical sets, the main steam temperature is 538/566/600 ℃, when a boiler operates at 30% load, the main steam temperature generally drops by 10-20 ℃ and is matched with the operating temperature of binary salt, and the main steam fused salt energy storage peak regulation becomes possible.
SUMMERY OF THE UTILITY MODEL
The utility model provides a fused salt energy storage deep peak regulation system suitable for a thermal power plant aiming at the problems.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a fused salt energy storage degree of depth peak shaving system suitable for thermal power factory, includes heat exchanger, hot molten salt jar, cold molten salt jar, reheater, over heater, evaporimeter and pre-heater, the steam inlet and the turbine main steam pipe of heat exchanger are connected, the steam outlet of heat exchanger and the entry linkage of boiler low temperature reheater, the medium entry and the medium export of heat exchanger are connected with the export of cold molten salt jar and the entry linkage of hot molten salt jar respectively, the export of hot molten salt jar connects gradually reheater, over heater and evaporimeter, at last with the entry linkage of cold molten salt jar to steam in reheater, over heater and the evaporimeter is heated through the hot molten salt, the pre-heater is used for heating the oxygen-eliminating device water that comes, the export of pre-heater connects gradually evaporimeter, steam pocket, over heater and reheater to the realization is to the heating of steam, the steam of reheater output is used for supplying turbo generator to use, the steam outlet of superheater is connected with the steam inlet of reheater or heating system's steam inlet, the steam outlet of steam drum is connected with the steam inlet of superheater or the steam inlet of oxygen-eliminating device or pre-heater, the steam outlet of pre-heater is connected with the oxygen-eliminating device.
The solar energy water heater is characterized by further comprising a photovoltaic power generation module and an electric heater, wherein the photovoltaic power generation module is used for supplying power for the electric heater, and a medium inlet and a medium outlet of the electric heater are respectively connected with an outlet of the cold molten salt tank and an inlet of the hot molten salt tank.
Still further, the electric heater is also connected with the power supply end of the power plant and is used for consuming zero/low price electricity of the power plant.
Compared with the prior art, the utility model has the following advantages:
1. the deep peak regulation effect is realized, when the load of the boiler is reduced to the minimum, part of main steam can be extracted for storing energy, the steam inlet quantity of a steam turbine is reduced, the power generation load can be reduced to 20%, and the problem that the minimum load of the boiler and the steam turbine is not matched is solved;
2. in the normal peak regulation process, when a load is added, the main steam is used for generating electricity; when the load is reduced, the main steam is used for storing energy, so that the peak shaving capacity of the unit is improved, and the ACE (adaptive control area) income of the unit is increased;
3. zero/low-price electricity of the power plant is used for heating and storing energy, and external power generation and supply are performed at high electricity price, so that the economy of the power plant is improved;
4. the photovoltaic power generation module is used for generating power and supplying power to the heat exchanger, so that the energy utilization rate is increased;
5. the utility model is suitable for subcritical, supercritical and ultra-supercritical units, the main steam parameter of the unit is matched with the parameter of the high-temperature molten salt, and the heat exchange efficiency is high.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, a stop valve-1, a regulating valve-2, a pressure regulating valve-3, a low-temperature molten salt pump-4, a high-temperature molten salt pump-5 and a water pump-6 are arranged.
Detailed Description
In order to further illustrate the technical solution of the present invention, the present invention is further illustrated by the following examples.
As shown in figure 1, a fused salt energy storage depth peak regulation system suitable for thermal power plant includes heat exchanger, hot molten salt jar, cold molten salt jar, reheater, superheater, evaporator, preheater, photovoltaic power generation module and electric heater, the photovoltaic power generation module is used for supplying power for electric heater, electric heater's medium entry and medium export respectively with the export of cold molten salt jar and the entry linkage of hot molten salt jar, the steam inlet and the turbine main steam pipe of heat exchanger are connected, the steam outlet and the entry linkage of boiler low temperature reheater of heat exchanger, the medium entry and the medium export of heat exchanger respectively with the export of cold molten salt jar and the entry linkage of hot molten salt jar, the export of hot molten salt jar connects gradually reheater, superheater and evaporator, and finally with the entry linkage of cold molten salt jar to reheater through the hot molten salt, Steam in superheater and the evaporimeter heats, the preheater is used for heating deaerator supplied water, evaporimeter, steam pocket, over heater and re-heater are connected gradually in the export of preheater to the realization is to the heating of steam, the steam of re-heater output is used for supplying turbo generator to use, the steam outlet of over heater is connected with the steam inlet of re-heater or heating system's steam inlet, the steam outlet of steam pocket is connected with the steam inlet of over heater or deaerator or the steam inlet of preheater, the steam outlet of preheater is connected with the deaerator.
The electric heater can also be connected with the power supply end of the power plant and is used for consuming zero/low-price electricity of the power plant.
The working principle is as follows: when reducing the load, with main steam drainage to heat exchanger, carry out the heat transfer with the low temperature fused salt, fused salt after being heated is stored to the hot molten salt jar, and main steam after the temperature reduction then gets into boiler low temperature reheater and heats once more, accessible photovoltaic power generation module or power plant supply end are the electric heater power supply simultaneously, the realization is to the heating of low temperature fused salt, fused salt after the heating is equally stored to the hot molten salt jar, when needs loading, main steam all is used for the electricity generation, hot molten salt in the hot molten salt jar simultaneously passes through the reheater, over heater and evaporimeter heat steam, the steam that is heated is reused in the electricity generation.
While there have been shown and described what are at present considered to be the essential features and advantages of the utility model, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. The utility model provides a fused salt energy storage degree of depth peak shaving system suitable for thermal power factory which characterized in that: including heat exchanger, hot molten salt jar, cold molten salt jar, re-heater, over heater, evaporimeter and pre-heater, the steam inlet and the turbine main steam pipe connection of heat exchanger, the steam outlet of heat exchanger and the entry linkage of boiler low temperature re-heater, the medium entry and the medium export of heat exchanger respectively with the export of cold molten salt jar and the entry linkage of hot molten salt jar, the export of hot molten salt jar connects gradually re-heater, over heater and evaporimeter, at last with the entry linkage of cold molten salt jar to steam in to re-heater, over heater and the evaporimeter is heated through the hot molten salt, the pre-heater is used for heating the oxygen-eliminating device water that comes, evaporimeter, steam pocket, over heater and re-heater are connected gradually in the export of pre-heater to the realization is to the heating of steam, the steam of re-heater output is used for supplying turbo generator to use, the steam outlet of over heater is connected with the steam inlet of re-heater or the steam inlet of heating system, the steam outlet of the steam drum is connected with the steam inlet of the superheater or the steam inlet of the deaerator or the preheater, and the steam outlet of the preheater is connected with the deaerator.
2. The fused salt energy storage deep peak regulation system suitable for the thermal power plant as claimed in claim 1, wherein: the solar water heater is characterized by further comprising a photovoltaic power generation module and an electric heater, wherein the photovoltaic power generation module is used for supplying power to the electric heater, and a medium inlet and a medium outlet of the electric heater are respectively connected with an outlet of the cold molten salt tank and an inlet of the hot molten salt tank.
3. The fused salt energy storage deep peak regulation system suitable for the thermal power plant as claimed in claim 2, wherein: the electric heater is also connected with the power supply end of the power plant and is used for consuming zero/low-price electricity of the power plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220241958.XU CN217004408U (en) | 2022-01-28 | 2022-01-28 | Fused salt energy storage degree of depth peak shaving system suitable for thermal power factory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220241958.XU CN217004408U (en) | 2022-01-28 | 2022-01-28 | Fused salt energy storage degree of depth peak shaving system suitable for thermal power factory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217004408U true CN217004408U (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220241958.XU Expired - Fee Related CN217004408U (en) | 2022-01-28 | 2022-01-28 | Fused salt energy storage degree of depth peak shaving system suitable for thermal power factory |
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| Country | Link |
|---|---|
| CN (1) | CN217004408U (en) |
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2022
- 2022-01-28 CN CN202220241958.XU patent/CN217004408U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220719 |
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| CF01 | Termination of patent right due to non-payment of annual fee |