CN220135442U - Water inlet temperature control system of fused salt heat storage system - Google Patents
Water inlet temperature control system of fused salt heat storage system Download PDFInfo
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- CN220135442U CN220135442U CN202321660966.9U CN202321660966U CN220135442U CN 220135442 U CN220135442 U CN 220135442U CN 202321660966 U CN202321660966 U CN 202321660966U CN 220135442 U CN220135442 U CN 220135442U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 150000003839 salts Chemical class 0.000 title claims abstract description 77
- 238000005338 heat storage Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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 relates to a water inlet temperature control system of a molten salt heat storage system, which comprises: a thermal power plant system and a molten salt heat storage system; the thermal power plant system includes: deaerator and high pressure heater; the water outlet of the deaerator is connected with the water outlet of the high-pressure heater to form a water outlet end; the water outlet end is connected with the molten salt heat storage system. According to the technical scheme provided by the utility model, the water inlet temperature of the fused salt system is higher than the design parameter requirement in the variable load operation process of the thermal power unit, so that the operation safety of the fused salt heat storage system is further ensured.
Description
Technical Field
The utility model relates to the technical field of molten salt energy storage, in particular to a water inlet temperature control system of a molten salt heat storage system.
Background
With the development of new energy, the consumption proportion of non-fossil energy accounting for primary energy is about 25%, the total installed capacity of wind power and solar power generation is more than 12 hundred million kilowatts, and it can be seen that the capacity and the generated energy of wind power and solar power generation of a next step are greatly improved from a total installation machine, and a thermal power unit is subjected to larger renewable energy consumption pressure, namely the deep peak regulation and rapid frequency regulation pressure of the thermal power unit.
The most widely used molten salt heat storage systems are solar and Hitts salts, which have melting points of 223℃and 140℃respectively. In order to ensure that the molten salt does not change phase in the heat exchange process, the molten salt heat storage system generally requires that the water inlet temperature is 30 ℃ higher than the melting point of the molten salt in the design process. Therefore, a set of water inlet temperature control system of the molten salt heat storage system is needed to be designed so as to ensure that the water inlet temperature of the molten salt system is higher than the design parameter requirement in the variable load operation process of the thermal power unit, and further ensure the operation safety of the molten salt heat storage system.
Disclosure of Invention
The utility model provides a water inlet temperature control system of a molten salt heat storage system, which at least solves the technical problem that the safety of the molten salt heat storage system is lower because the water inlet temperature cannot be ensured to be higher than the melting point of molten salt by a preset value in the related technology.
An embodiment of a first aspect of the present utility model provides a water inlet temperature control system of a molten salt heat storage system, including: a thermal power plant system and a molten salt heat storage system;
the thermal power plant system includes: deaerator and high pressure heater;
the water outlet of the deaerator is connected with the water outlet of the high-pressure heater to form a water outlet end;
the water outlet end is connected with the molten salt heat storage system.
Preferably, the water inlet temperature control system further comprises: a first valve and a second valve;
the first valve is arranged at the water outlet of the high-pressure heater;
the second valve is arranged at the water outlet of the deaerator.
Further, the thermal power plant system further includes: the system comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a generator, a condenser and a low-pressure heater;
the boiler is connected with the high-pressure cylinder, the medium-pressure cylinder and the high-pressure heater;
the high-pressure cylinder and the medium-pressure cylinder are respectively connected with the high-pressure heater;
the medium pressure cylinder, the high pressure heater and the low pressure heater are respectively connected with the deaerator;
the low-pressure heater is respectively connected with the low-pressure cylinder and the condenser;
the generator is connected with the low-pressure cylinder.
Further, the molten salt heat storage system includes: a salt-water heat exchanger, a high temperature tank, a low temperature tank and a molten salt electric heater;
the output end of the generator is connected with the molten salt electric heater;
the output end of the low-temperature tank is connected with the input end of the molten salt electric heater, and the input end of the low-temperature tank is connected with the output end of the salt-water heat exchanger;
the input end of the high-temperature tank is connected with the output end of the molten salt electric heater, and the output end of the high-temperature tank is connected with the input end of the salt-water heat exchanger.
Further, the water outlet end is connected with the input end of the salt-water heat exchanger.
The technical scheme provided by the embodiment of the utility model at least has the following beneficial effects:
the utility model provides a water inlet temperature control system of a molten salt heat storage system, which comprises: a thermal power plant system and a molten salt heat storage system; the thermal power plant system includes: deaerator and high pressure heater; the water outlet of the deaerator is connected with the water outlet of the high-pressure heater to form a water outlet end; the water outlet end is connected with the molten salt heat storage system. According to the technical scheme provided by the utility model, the water inlet temperature of the fused salt system is higher than the design parameter requirement in the variable load operation process of the thermal power unit, so that the operation safety of the fused salt heat storage system is further ensured.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a block diagram of a feed water temperature control system for a molten salt heat storage system provided in accordance with one embodiment of the utility model;
FIG. 2 is a detailed block diagram of a feed water temperature control system for a molten salt heat storage system provided in accordance with one embodiment of the utility model;
reference numerals:
the system comprises a thermal power plant system 1, a molten salt heat storage system 2, a deaerator 1-1, a high-pressure heater 1-2, a water outlet end 1-3, a boiler 1-4, a high-pressure cylinder 1-5, a medium-pressure cylinder 1-6, a low-pressure cylinder 1-7, a generator 1-8, a condenser 1-9, a low-pressure heater 1-10, a first valve 3, a second valve 4, a salt-water heat exchanger 2-1, a high-temperature tank 2-2, a low-temperature tank 2-3 and a molten salt electric heater 2-4.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
The utility model provides a water inlet temperature control system of a molten salt heat storage system, which comprises: a thermal power plant system and a molten salt heat storage system; the thermal power plant system includes: deaerator and high pressure heater; the water outlet of the deaerator is connected with the water outlet of the high-pressure heater to form a water outlet end; the water outlet end is connected with the molten salt heat storage system. According to the technical scheme provided by the utility model, the water inlet temperature of the fused salt system is higher than the design parameter requirement in the variable load operation process of the thermal power unit, so that the operation safety of the fused salt heat storage system is further ensured.
The following describes a water inlet temperature control system of a molten salt heat storage system according to an embodiment of the present utility model with reference to the accompanying drawings.
Example 1
Fig. 1 is a block diagram of a water inlet temperature control system of a molten salt heat storage system according to an embodiment of the disclosure, as shown in fig. 1, where the system includes: a thermal power plant system 1 and a molten salt heat storage system 2;
the thermal power plant system 1 includes: a deaerator 1-1 and a high-pressure heater 1-2;
the water outlet of the deaerator 1-1 is connected with the water outlet of the high-pressure heater 1-2 to form a water outlet end 1-3;
the water outlet end 1-3 is connected with the molten salt heat storage system 2.
In the fused salt heat storage coupling system of the thermal power unit, water entering the fused salt heat storage system 1 is generally taken from the outlet of the deaerator 1-1, but is limited by the variable load operation characteristic of the thermal power unit, the water temperature at the outlet of the deaerator 1-1 is not equal from 120 ℃ to 180 ℃, and the lower the load is, the lower the water temperature is. When the water temperature is lower than the design temperature, a small amount of molten salt crystals and even phase changes exist in the molten salt heat storage system 2, so that the operation safety of the molten salt heat storage system is greatly reduced. The system adopts a method of mixing desalted water at the outlet of the deaerator 1-1 with desalted water at the outlet of the high-pressure heater 1-2, so as to ensure that the water inlet temperature of the molten salt heat storage system 2 is controlled above the design temperature under different working conditions.
In an embodiment of the disclosure, as shown in fig. 2, the water inlet temperature control system further includes: a first valve 3 and a second valve 4;
the first valve 3 is arranged at the water outlet of the high-pressure heater 1-2;
the second valve 4 is arranged at the water outlet of the deaerator 1-1.
Further, as shown in fig. 2, the thermal power plant system 1 further includes: 1-4 parts of boiler, 1-5 parts of high-pressure cylinder, 1-6 parts of medium-pressure cylinder, 1-7 parts of low-pressure cylinder, 1-8 parts of generator, 1-9 parts of condenser and 1-10 parts of low-pressure heater; the number of the low-pressure heaters 1-10 can be 4, the number of the high-pressure heaters 1-2 can be 3, and the connection relation is shown in figure 2;
the boiler 1-4 is connected with the high-pressure cylinder 1-5, the medium-pressure cylinder 1-6 and the high-pressure heater 1-2;
the high-pressure cylinder 1-5 and the medium-pressure cylinder 1-6 are respectively connected with the high-pressure heater 1-2;
the medium pressure cylinder 1-6, the high pressure heater 1-2 and the low pressure heater 1-10 are respectively connected with the deaerator 1-1;
the low-pressure heater 1-10 is respectively connected with the low-pressure cylinder 1-7 and the condenser 1-9;
the generator 1-8 is connected with the low pressure cylinder 1-7.
Further, as shown in fig. 2, the molten salt heat storage system 2 includes: a salt-water heat exchanger 2-1, a high temperature tank 2-2, a low temperature tank 2-3 and a molten salt electric heater 2-4;
the output end of the generator 1-8 is connected with the molten salt electric heater 2-4 and is used for supplying electricity generated by the thermal power plant system 1 to the molten salt electric heater 2-4 for utilization;
the output end of the low-temperature tank 2-3 is connected with the input end of the molten salt electric heater 2-4, and the input end of the low-temperature tank 2-3 is connected with the output end of the salt-water heat exchanger 2-1;
the input end of the high-temperature tank 2-2 is connected with the output end of the molten salt electric heater 2-4, and the output end of the high-temperature tank 2-2 is connected with the input end of the salt-water heat exchanger 2-1.
It should be noted that, as shown in fig. 2, the water outlet end 1-3 is connected with the input end of the salt-water heat exchanger 2-1, and when the water temperature is lower than the design temperature, a method of mixing the desalted water at the outlet of the deaerator 1-1 with the desalted water at the outlet of the high-pressure heater 1-2 is adopted to ensure that the water inlet temperature of the molten salt heat storage system 2 is controlled above the design temperature under different working conditions.
By way of example, the boiler 1-4 of the thermal power plant system 1 works once to generate steam through the high-pressure cylinder 1-5, the medium-pressure cylinder 1-6 and the low-pressure cylinder 1-7, the generator 1-8 is driven to work to generate electric energy to supply power grid and the molten salt electric heater 2-4 for practical use, meanwhile, water at the outlet of the deaerator 1-1 is taken to be input into the molten salt heat storage system 2 for heat exchange to generate steam for external supply or return to a thermodynamic system, but the thermal power plant system is limited by the variable load operation characteristic of a thermal power unit, the water temperature at the outlet of the deaerator 1-1 is unequal from 120 ℃ to 180 ℃, and the lower the load is, the lower the water temperature is. When the water temperature is lower than the design temperature, a small amount of molten salt crystals and even phase changes exist in the molten salt heat storage system 2, so that the operation safety of the molten salt heat storage system is greatly reduced.
Therefore, in the embodiment, the water at the outlet of the high-pressure heater 1-2 is mixed with the deoxidized water at the outlet of the deoxidizer 1-1, the mixed water is input into the salt-water heat exchanger 2-1 of the molten salt heat storage system 2 to exchange heat to generate steam, wherein the water quantity is controlled by the first valve 3 and the second valve 4 so as to control the water temperature entering the salt-water heat exchanger 2-1, and the operation safety of the molten salt heat storage system is ensured.
In summary, the water inlet temperature control system of the molten salt heat storage system provided by the embodiment can ensure that the water inlet temperature of the molten salt system is higher than the design parameter requirement in the variable load operation process of the thermal power unit, so that the operation safety of the molten salt heat storage system is ensured.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present utility model in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present utility model.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (5)
1. A feed water temperature control system for a molten salt heat storage system, comprising: a thermal power plant system and a molten salt heat storage system;
the thermal power plant system includes: deaerator and high pressure heater;
the water outlet of the deaerator is connected with the water outlet of the high-pressure heater to form a water outlet end;
the water outlet end is connected with the molten salt heat storage system.
2. The feedwater temperature control system of claim 1, wherein the feedwater temperature control system further comprises: a first valve and a second valve;
the first valve is arranged at the water outlet of the high-pressure heater;
the second valve is arranged at the water outlet of the deaerator.
3. The feedwater temperature control system of claim 2, wherein the thermal power plant system further comprises: the system comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a generator, a condenser and a low-pressure heater;
the boiler is connected with the high-pressure cylinder, the medium-pressure cylinder and the high-pressure heater;
the high-pressure cylinder and the medium-pressure cylinder are respectively connected with the high-pressure heater;
the medium pressure cylinder, the high pressure heater and the low pressure heater are respectively connected with the deaerator;
the low-pressure heater is respectively connected with the low-pressure cylinder and the condenser;
the generator is connected with the low-pressure cylinder.
4. The feed water temperature control system of claim 3 wherein the molten salt heat storage system comprises: a salt-water heat exchanger, a high temperature tank, a low temperature tank and a molten salt electric heater;
the output end of the generator is connected with the molten salt electric heater;
the output end of the low-temperature tank is connected with the input end of the molten salt electric heater, and the input end of the low-temperature tank is connected with the output end of the salt-water heat exchanger;
the input end of the high-temperature tank is connected with the output end of the molten salt electric heater, and the output end of the high-temperature tank is connected with the input end of the salt-water heat exchanger.
5. The feedwater temperature control system of claim 4, wherein the water outlet is connected to an input of the salt-water heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321660966.9U CN220135442U (en) | 2023-06-28 | 2023-06-28 | Water inlet temperature control system of fused salt heat storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321660966.9U CN220135442U (en) | 2023-06-28 | 2023-06-28 | Water inlet temperature control system of fused salt heat storage system |
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| CN220135442U true CN220135442U (en) | 2023-12-05 |
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| CN202321660966.9U Active CN220135442U (en) | 2023-06-28 | 2023-06-28 | Water inlet temperature control system of fused salt heat storage system |
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- 2023-06-28 CN CN202321660966.9U patent/CN220135442U/en active Active
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