CN219281803U - Device for improving load rate of thermal generator set based on molten salt energy storage - Google Patents
Device for improving load rate of thermal generator set based on molten salt energy storage Download PDFInfo
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- CN219281803U CN219281803U CN202320770644.3U CN202320770644U CN219281803U CN 219281803 U CN219281803 U CN 219281803U CN 202320770644 U CN202320770644 U CN 202320770644U CN 219281803 U CN219281803 U CN 219281803U
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- 150000003839 salts Chemical class 0.000 title claims abstract description 98
- 238000004146 energy storage Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000009194 climbing Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The utility model discloses a device for improving the load rate of a thermal generator set based on molten salt energy storage, which comprises a generator set and a power grid connected with the generator set, wherein the generator set comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder and a generator; the electric power transmission section of the generator and the power grid is provided with a fused salt electric heater; the molten salt electric heater continuously supplies heat for the high-temperature molten salt tank; the heat of the high-temperature molten salt tank is transmitted to the molten salt steam generator through a pipeline, water in the molten salt steam generator is heated, superheated steam is generated and sent into a low-pressure cylinder of a generator set to do work based on an electrothermal molten salt energy storage technology under controllable load, the load of an electric heater of the molten salt is slowly reduced, the heat of an energy storage system is released to generate steam and enter the low-pressure cylinder to do work, and the electric load climbing rate of the generator set is improved through gradually reducing the load electric load and increasing the acting quantity of the generated steam.
Description
Technical Field
The utility model relates to the technical field of thermal generator set adjustment, in particular to a device for improving the load rate of a thermal generator set based on molten salt energy storage.
Background
In recent years, the scale and specific gravity of renewable energy power generation such as wind power and photovoltaic are greatly improved. However, renewable energy sources have the characteristics of volatility, intermittence and the like, and after being connected into a power grid, the conventional thermal generator set is required to be provided with the capability of rapidly lifting and lowering electric loads besides the auxiliary service of increasing deep peak shaving and peaking.
Therefore, under the dual background that the coal-fired thermal power generating unit occupies the main power supply position and meanwhile large-scale unstable renewable energy is needed to be connected with the power grid, the flexible operation capability of the thermal power generating unit in China is needed to be improved.
The flexible peak regulation and peaking of the unit are realized by utilizing molten salt heat storage, but the flexible peak regulation and peaking become research hot spots, but the flexible peak regulation and peaking mainly focus on the suitability research of electric heating, flue gas heating and steam heating modes under the deep peak regulation and peaking background and the peak regulation potential of the excavator unit.
The conventional fused salt energy storage mainly realizes deep peak regulation of the unit in a thermoelectric decoupling mode, the fused salt power load of the system in a non-operation mode is zero, the low-power load operation of the unit is realized only in the deep peak regulation period through absorbing redundant electric quantity, the quick load reduction of the unit can be realized to a certain extent, but the quick load lifting problem of the unit cannot be effectively solved, and the system has no obvious effect on improving the climbing rate of the unit.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model provides the device for improving the electric load climbing rate of the unit by gradually reducing the load electric load and increasing the acting quantity of generated steam and greatly improving the load rate of the thermal generator unit based on fused salt energy storage.
In order to achieve the aim, the utility model provides a fused salt energy storage-based load rate improving device of a thermal power generating set, which comprises the thermal power generating set and a power grid connected with the thermal power generating set, wherein the thermal power generating set comprises a boiler and a generator, the boiler sequentially passes through a high-pressure cylinder and a medium-pressure cylinder and is connected with a low-pressure cylinder through a fifth valve, the generator is electrically connected with the low-pressure cylinder and provides driving force for the whole system, a fused salt electric heater for supplying heat to a high-temperature fused salt tank is arranged on an electric power transmission section of the generator and the power grid, the high-temperature fused salt tank is connected with a fused salt steam generator through a pipeline, and steam generated by the fused salt steam generator is fed into the low-pressure cylinder through a fourth valve.
As a further improvement of the scheme, a high-temperature molten salt heating pipeline in the molten salt steam generator is communicated with a low-temperature molten salt tank, and the low-temperature molten salt tank pipeline is communicated with the molten salt electric heater through a low-temperature molten salt pump and a second valve.
As a further improvement of the scheme, a booster feed pump is arranged on the water inlet end of the molten salt steam generator.
As a further improvement of the scheme, a high-temperature molten salt pump and a first valve are arranged on the pipeline of the high-temperature molten salt tank and the molten salt steam generator.
As a further improvement of the scheme, the booster water supply pump is communicated with the water inlet end of the molten salt steam generator through a third valve, and is connected with the deaerator for water supply.
The beneficial effects of the utility model are as follows: according to the fused salt energy storage-based load rate improving device for the thermal power generator set, the fused salt electric heater is connected between the existing power generator set and the power grid, continuous power supply is provided for the fused salt electric heater, and meanwhile, continuous heat supply is provided for the high-temperature fused salt tank, so that the high-temperature fused salt tank keeps storing energy;
the utility model is based on an electrothermal fused salt energy storage technology under controllable load, and can increase the actual on-line electric load of a thermal power unit by slowly reducing the fused salt electric heater load, simultaneously release the heat of an energy storage system to generate steam to enter a low-pressure cylinder to do work, and increase the electric load climbing rate of the unit by gradually reducing the load electric load and generating the increased work quantity of the steam.
Drawings
Fig. 1 is a system structure diagram of a device for improving load rate of a thermal generator set based on molten salt energy storage, which is provided by an embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the utility model, fall within the scope of protection of the utility model.
Example 1
As shown in fig. 1, this embodiment is based on fused salt energy storage to promote thermal generator unit load rate device, including thermal generator unit and electric wire netting (6) of connecting thermal generator unit, thermal generator unit includes boiler (1) and generator (5), boiler (1) are through high pressure cylinder (2) and well pressure cylinder (3) and link to each other with low pressure cylinder (4) through fifth valve (18) in proper order, generator (5) and low pressure cylinder (4) electric connection and provide driving force for whole system, be equipped with fused salt (9) on the electric power transmission section of generator (5) and electric wire netting (6), fused salt electric heater 9 is for high temperature fused salt jar 7 continuously provides heat, high temperature fused salt jar (7) are through pipeline and fused salt steam generator (10) link to each other, the heat of the high temperature fused salt of high temperature fused salt jar 7 is through pipeline transmission to the water in the steam generator 10, fused salt steam generator (10) produced steam is sent into low pressure cylinder (4) through fourth valve (17), send into the superheated steam that fused salt steam generator (10) produced into the low pressure generator unit's in doing work.
In this embodiment, high temperature fused salt heating pipeline in fused salt steam generator (10) communicates low temperature fused salt jar (8), low temperature fused salt jar (8) pipeline is through low temperature fused salt pump (12) and second valve (15) intercommunication fused salt electric heater (9), be provided with on the inlet end of fused salt steam generator (10) and boost feed water pump (13), boost feed water pump (13) are communicated with the inlet end of fused salt steam generator (10) through third valve (16), boost feed water pump (13) inserts deaerator and comes water, be equipped with high temperature fused salt pump (11) and first valve (14) on the pipeline of high temperature fused salt jar (7) and fused salt steam generator (10).
It should be noted that, the molten salt steam generator (10), the low-temperature molten salt pump 12, the molten salt electric heater 9 and the high-temperature molten salt pump 11 form a circulation loop, so as to continuously supply heat for the whole system, circularly utilize the electrothermal molten salt energy storage technology, save energy, protect environment, avoid heat energy loss and greatly improve the response speed of the electric load of the unit.
Example 2
When the electric power system is in a non-rapid response load change period, the second valve 15 is opened, the low-temperature molten salt pump 12 is started, the molten salt electric heater 9 is enabled to continuously operate with certain electric power, the first valve 14, the third valve 16 and the fourth valve 17 are closed, the fifth valve 18 is fully opened, at the moment, the high-temperature molten salt pump 11 and the boosting water supply pump 13 do not work, and in the state, the whole device only performs a heat storage process, and the thermal generator unit is in a conventional operation mode.
When the system needs to respond to the load rising change period quickly, gradually reducing the electric power of the fused salt electric heater 9 according to the load rising rate, and combining the required length of the target load, and enabling the change rate of the electric power to be as close as possible to the requirements of a unit;
simultaneously, the booster feed pump 13 and the high-temperature molten salt pump 11 are slowly started, the first valve 14, the third valve 16 and the fourth valve 17 are opened, and the opening degrees of the fourth valve 17 and the fifth valve 18 are regulated so as to maintain the stable pressure of the outlet of the medium-pressure cylinder 3 and the inlet of the low-pressure cylinder 4; the deaerator water boosted by the boosting water supply pump 13 is heated by releasing the heat of the high-temperature molten salt in the high-temperature molten salt tank 7, superheated steam is generated to enter the low-pressure cylinder 4 to apply work, the steam quantity generated by the steam generating system gradually increases, and the load lifting rate of the unit can be effectively improved as the steam quantity of the work entering the low-pressure cylinder 4 increases due to the fact that the steam generating system is much smaller than the thermal inertia of the boiler system.
The utility model is based on an electrothermal fused salt energy storage technology under controllable load, utilizes the slow reduction of the load of the fused salt electric heater 9, releases the heat of an energy storage system to generate steam to enter the low-pressure cylinder 4 to apply work, and improves the climbing rate of the electric load of the unit by gradually reducing the load electric load and increasing the work amount of the generated steam.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in 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. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
The above embodiments are not intended to limit the present utility model, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model should be included in the scope of the present utility model.
Claims (5)
1. Load rate device for lifting thermal generator set based on molten salt energy storage, comprising a thermal generator set and a power grid (6) connected with the thermal generator set, and the device is characterized in that: the thermal generator set comprises a boiler (1) and a generator (5), wherein the boiler (1) is sequentially connected with a low-pressure cylinder (4) through a high-pressure cylinder (2) and a medium-pressure cylinder (3) and a fifth valve (18), the generator (5) is electrically connected with the low-pressure cylinder (4) and provides driving force for the whole system, a fused salt electric heater (9) for supplying heat to a high-temperature fused salt tank (7) is arranged on an electric power transmission section of the generator (5) and a power grid (6), the high-temperature fused salt tank (7) is connected with a fused salt steam generator (10) through a pipeline, and steam generated by the fused salt steam generator (10) is fed into the low-pressure cylinder (4) through a fourth valve (17).
2. The fused salt energy storage-based load rate increasing device for a thermal generator set according to claim 1, wherein: the high-temperature molten salt heating pipeline in the molten salt steam generator (10) is communicated with the low-temperature molten salt tank (8), and the pipeline of the low-temperature molten salt tank (8) is communicated with the molten salt electric heater (9) through the low-temperature molten salt pump (12) and the second valve (15).
3. The molten salt-based energy storage thermal generator set load rate increasing device according to claim 1 or 2, wherein: the water inlet end of the molten salt steam generator (10) is provided with a booster water supply pump (13).
4. The fused salt energy storage-based load rate increasing device for a thermal generator set according to claim 1, wherein: the pipeline of the high-temperature molten salt tank (7) and the molten salt steam generator (10) is provided with a high-temperature molten salt pump (11) and a first valve (14).
5. The fused salt energy storage-based load rate increasing device for a thermal generator set according to claim 3, wherein: the booster water feed pump (13) is communicated with the water inlet end of the molten salt steam generator (10) through a third valve (16), and the booster water feed pump (13) is connected with the deaerator for water supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320770644.3U CN219281803U (en) | 2023-04-10 | 2023-04-10 | Device for improving load rate of thermal generator set based on molten salt energy storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320770644.3U CN219281803U (en) | 2023-04-10 | 2023-04-10 | Device for improving load rate of thermal generator set based on molten salt energy storage |
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| Publication Number | Publication Date |
|---|---|
| CN219281803U true CN219281803U (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320770644.3U Active CN219281803U (en) | 2023-04-10 | 2023-04-10 | Device for improving load rate of thermal generator set based on molten salt energy storage |
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| CN (1) | CN219281803U (en) |
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2023
- 2023-04-10 CN CN202320770644.3U patent/CN219281803U/en active Active
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