CN112393447B - Solar energy light and heat power station fused salt storage device, storage system and light and heat power station - Google Patents
Solar energy light and heat power station fused salt storage device, storage system and light and heat power station Download PDFInfo
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- CN112393447B CN112393447B CN202011204286.7A CN202011204286A CN112393447B CN 112393447 B CN112393447 B CN 112393447B CN 202011204286 A CN202011204286 A CN 202011204286A CN 112393447 B CN112393447 B CN 112393447B
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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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- 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
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
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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
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Abstract
The invention discloses a solar energy photo-thermal power station fused salt storage device, a storage system and a photo-thermal power station, comprising: the storage device body, this internal molten salt pump assembly part that is provided with of storage device, molten salt pump assembly part are provided with the fused salt entry, and the radial dimension of accommodation space is less than the radial dimension of storage device body in the molten salt pump assembly part. According to the invention, the molten salt pump assembly part is arranged in the storage device body, when the molten salt in the storage device body reaches the lowest working liquid level of the molten salt pump, the negative pressure is formed in the accommodating space of the molten salt pump assembly part, and the molten salt in the storage device body can flow into the molten salt pump assembly part under the action of the pressure difference, so that the molten salt liquid level in the molten salt pump assembly part is higher than the lowest working liquid level of the molten salt pump, and the molten salt pump can work at the moment, thereby reducing the molten salt loss caused by the lowest working liquid level of the molten salt pump.
Description
Technical Field
The invention relates to the technical field of solar photo-thermal power stations, in particular to a fused salt storage device of a solar photo-thermal power station.
Background
The solar high-temperature thermal power generation technology is an important direction for the scale utilization of solar energy. The working media adopted by the solar high-temperature thermal power generation include water (steam), molten salt, air, heat conduction oil, liquid metal, other heat conduction media and the like. Due to the fluctuation and discontinuity of solar illumination, a large-scale heat storage system is required in the solar photo-thermal power generation system to continuously and stably generate power. The fused salt has the characteristics of high use temperature, wide temperature range, good flow characteristic, large heat capacity and the like, can just make up the problem of unstable solar illumination when being applied to a heat storage system as a heat storage working medium, and is the most widely applied solar heat storage working medium at present.
At present, most of trough type, linear Fresnel type or tower type photo-thermal power stations adopt large storage tanks to store molten salt. The height-diameter ratio of the common molten salt storage tank is not too large, namely the diameter of the molten salt storage tank is often larger. Meanwhile, the most widely used molten salt conveying method at present adopts a long-shaft vertical molten salt pump, namely the molten salt pump is arranged on a supporting platform at the top of a storage tank and extends into the bottom of the storage tank from top to bottom, and a suction inlet of the molten salt pump is close to a bottom plate of the storage tank. The operation of the molten salt pump requires the lowest liquid level of the molten salt in the storage tank, so that a large amount of unavailable molten salt exists at the bottom of the storage tank, and the economic efficiency of a power station is greatly influenced. How to reduce the lowest use level of the storage tank as much as possible is a problem to be solved by the current photo-thermal power station.
Disclosure of Invention
The invention provides a solar thermal power station molten salt storage device, which can overcome the defects in the prior art.
The technical scheme of the invention is as follows:
a solar energy light and heat power station fused salt storage device includes: a storage device body for storing molten salt; the storage device comprises a storage device body and is characterized in that at least one molten salt pump assembly part is arranged in the storage device body, an accommodating space for accommodating a molten salt pump and molten salt is formed in the molten salt pump assembly part, the molten salt pump assembly part is provided with at least one molten salt inlet, the molten salt inlet extends to the position below the lowest working liquid level of the molten salt pump, and the radial size of the accommodating space is smaller than that of the storage device body; when the molten salt in the storage device body reaches the lowest working liquid level of the molten salt pump, negative pressure is formed in the accommodating space of the molten salt pump assembly part, so that the molten salt in the storage device body flows into the molten salt pump assembly part from the molten salt inlet under the action of pressure difference, and then is pumped out of the storage device body through the molten salt pump assembled in the accommodating space, and therefore molten salt loss caused by the lowest working liquid level of the molten salt pump is reduced.
Through this internal molten salt pump assembly spare that sets up an assembly molten salt pump at storage device, make the molten salt pump assemble in accommodation space wherein, when this internal liquid level of storage device is higher, the fused salt can be because of gravitational potential energy from the molten salt entry inflow molten salt pump assembly spare, and the molten salt pump can be pumped the fused salt this moment with normal work. When this internal fused salt of storage device reaches the minimum working solution level of fused salt pump, the fused salt pump can not pump the fused salt, this moment, form the negative pressure through the accommodation space at fused salt pump assembly spare, then this internal fused salt of storage device can flow into in the fused salt pump assembly spare under the effect of pressure differential, thereby make the fused salt liquid level in the fused salt pump assembly spare be higher than the minimum working solution level of fused salt pump, the fused salt pump can work this moment, thereby reduced because of the fused salt pump the minimum working solution level and the fused salt loss that causes.
Wherein, each storage device body can be configured with one molten salt pump assembly, or each storage device body can be configured with a plurality of molten salt pump assemblies (such as 2, 3, 4 or more), and the larger the number of molten salt pump assemblies is, more molten salt pumps can be assembled, thereby improving the efficiency of molten salt pumping.
Preferably, the molten salt pump assembly part is assembled at the top of the storage device body, the molten salt pump assembly part is provided with at least one molten salt pump assembly port, a molten salt pump is arranged at each molten salt pump assembly port, and each molten salt pump is in sealing connection with the molten salt pump assembly part. The sealed connection can form a closed space in the molten salt pump assembly, so that the vacuum degree in the accommodating space can be improved when negative pressure is formed. One or more molten salt pumps can be configured for each molten salt pump assembly part and are set according to the actual size of the molten salt pump assembly parts.
Preferably, the molten salt inlets are uniformly distributed in the circumferential direction of the molten salt pump assembly. The more the number of the molten salt inlets is, the higher the speed of the molten salt flowing into the molten salt pump assembly part is, and the more reliable the molten salt pump can work.
Preferably, the molten salt inlet is provided with a molten salt non-return device to prevent the molten salt from flowing out of the molten salt pump assembly under negative pressure.
Preferably, the molten salt non-return device comprises a valve seat, a valve plate and a rotating shaft, wherein the valve seat is arranged on the periphery of the molten salt inlet, the valve plate covers the valve seat, the valve plate is rotatably connected to the molten salt pump assembly part through the rotating shaft, and the molten salt inlet is in an open state or a closed state when the valve plate rotates.
Preferably, the molten salt non-return device is arranged in the molten salt pump assembly, the valve seat is of an annular structure, the valve seat is sleeved on the periphery of the molten salt inlet, the rotating shaft is arranged at a preset position above the valve seat, so that the valve plate rotates to open or close the molten salt inlet, and a preset angle is formed between the valve plate and the molten salt liquid level when the valve plate is in a closed state, so that the valve plate can be lifted and then can be seated back due to the self gravity. The valve plate can make the fused salt entry open or close through the pivot is rotatory, can rely on the gravity of valve plate self to sit back after the valve plate is lifted up, guarantees fused salt non return device's non return effect.
Preferably, the molten salt pump assembly part is provided with a negative pressure interface, the negative pressure interface is connected with a negative pressure generating device, and when the negative pressure generating device works, the containing space in the molten salt pump assembly part generates negative pressure.
Preferably, the negative pressure generating device comprises a vacuum pump body, a speed changing device and an impeller device, the impeller device is connected with the vacuum pump body through the speed changing device, the impeller device is installed on a molten salt descending pipeline connected with an outlet of the heat absorber, the impeller device is driven to rotate by the gravitational potential energy of molten salt through the lower part in the molten salt descending pipeline, and the vacuum pump body is driven to work through the acceleration effect of the speed changing device to achieve the effect of vacuumizing. The invention fully utilizes the gravitational potential energy of the molten salt in the descending pipeline to drive the vacuum pump to vacuumize, recovers the gravitational potential energy of the descending molten salt, improves the utilization rate of energy and improves the economy.
A molten salt storage system comprising a molten salt storage device as described in any one of the above.
A solar photo-thermal power station comprising the molten salt storage device or the molten salt storage system.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the molten salt pump assembly part for assembling the molten salt pump is arranged in the storage device body, so that the molten salt pump is assembled in the accommodating space, when the molten salt in the storage device body reaches the lowest working liquid level of the molten salt pump, negative pressure is formed in the accommodating space of the molten salt pump assembly part, the molten salt in the storage device body flows into the molten salt pump assembly part under the action of pressure difference, the molten salt liquid level in the molten salt pump assembly part is higher than the lowest working liquid level of the molten salt pump, and the molten salt pump can work at the moment, so that the molten salt loss caused by the lowest working liquid level of the molten salt pump is reduced, the quality of the molten salt which cannot be utilized in the storage device body is greatly reduced, and the utilization rate is increased.
Secondly, the impeller device is arranged on the molten salt descending pipeline at the outlet of the heat absorber, so that the gravitational potential energy of the molten salt in the descending pipeline is fully utilized, the impact of the molten salt on the pipeline and equipment is reduced, and meanwhile, the energy is further recycled.
Thirdly, a molten salt non-return device is arranged in the molten salt pump assembly part of the invention, and molten salt is prevented from flowing out when flowing into the molten salt pump assembly part.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
FIG. 1 is a schematic view of a molten salt storage apparatus of example 1 of the invention;
FIG. 2 is a schematic view of the structure at the molten salt inlet in example 1 of the present invention.
Reference numerals: a storage device body 100; a storage tank foundation 1; a storage tank heat-insulating layer 2; a negative pressure generating device 3; a valve 4; a molten salt pump 5; molten salt level 6; a molten salt pump assembly 7; an accommodating space 70; a molten salt inlet 71; a molten salt pump mounting port 72; a negative pressure port 73; a molten salt non-return device 8; a valve seat 10; a valve plate 11; a rotating shaft 12; a vacuum pump body 31; a transmission 32; an impeller device 33; a molten salt descending conduit 9.
Detailed Description
In the description of the present invention, it should be noted that the lowest liquid level at which the molten salt pump can normally operate is referred to as the "lowest operating liquid level" of the molten salt pump.
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 simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific 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 and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 a specific case to those of ordinary skill in the art.
As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In practice, the invention will be understood to cover all modifications and variations of this invention provided they come within the scope of the appended claims.
Example 1
The embodiment provides a solar photothermal power station molten salt storage device, and referring to fig. 1 and fig. 2, the molten salt storage device in the embodiment is a schematic structural diagram. The molten salt storage device comprises: a storage device body 100 for storing molten salt; at least one molten salt pump assembly part 7 is arranged in the storage device body 100, an accommodating space 70 for accommodating the molten salt pump and the molten salt is formed inside the molten salt pump assembly part 7, the molten salt pump assembly part 7 is provided with at least one molten salt inlet 71, the molten salt inlet 71 extends to the position below the lowest working liquid level of the molten salt pump, and the radial size of the accommodating space 70 is smaller than that of the storage device body 100; when the molten salt in the storage device body 100 reaches the lowest working liquid level of the molten salt pump, negative pressure is formed in the accommodating space of the molten salt pump assembly part 7, so that the molten salt in the storage device body 100 flows into the molten salt pump assembly part 7 from the molten salt inlet 71 under the action of pressure difference, and then is pumped out of the storage device body 100 through the molten salt pump assembled in the accommodating space, and therefore molten salt loss caused by the lowest working liquid level of the molten salt pump is reduced.
Through set up a molten salt pump assembly part 7 of assembly molten salt pump in storage device body 100, make the molten salt pump assemble in accommodation space 70 wherein, when the liquid level was higher in storage device body 100, the fused salt can be because of gravitational potential energy flows into molten salt pump assembly part 7 from molten salt entry 71, and the molten salt pump normal work can be pumped the fused salt at this moment. When the fused salt in the storage device body 100 reaches the minimum working liquid level of the fused salt pump, the fused salt pump can not pump out the fused salt, at this moment, form the negative pressure in the accommodation space of fused salt pump assembly part 7, then the fused salt in the storage device body 100 can flow into in the fused salt pump assembly part 7 under the effect of pressure difference, thereby make the fused salt liquid level in the fused salt pump assembly part 7 be higher than the minimum working liquid level of fused salt pump, the fused salt pump can work this moment, thereby reduced the fused salt loss because of the minimum working liquid level of fused salt pump causes.
Wherein, each storage device body 100 can be configured with one molten salt pump assembly 7, or each storage device body 100 can be configured with a plurality of molten salt pump assemblies 7 (such as 2, 3, 4 or more), and the larger the number of molten salt pump assemblies 7, the more molten salt pumps can be assembled, so as to improve the efficiency of pumping out the molten salt.
Specifically, the storage device body 100 is a molten salt storage tank, and can be made of a high-temperature-resistant material for storing high-temperature molten salt or a low-temperature molten salt storage tank. The storage device body 100 includes a storage tank foundation 1 and a storage tank insulation layer 2. The molten salt pump assembly 7 is a sleeve installed inside the storage device body 100, and the upper portion of the molten salt pump assembly 7 is connected to the dome or the bracket.
In this embodiment, the molten salt pump assembly 7 is assembled on the top of the storage device body 100, and the molten salt pump assembly 7 is provided with at least one molten salt pump assembly opening 72, each molten salt pump assembly opening 72 is provided with a molten salt pump 5, and each molten salt pump 5 is connected with the molten salt pump assembly 7 in a sealing manner. The sealed connection enables a closed space to be formed in the molten salt pump assembly 7, so that the vacuum in the receiving space 70 can be increased when a negative pressure is formed. One or more molten salt pumps (e.g., 2, 3, 4 or more) may be provided for each molten salt pump assembly 7, and are set according to the actual size of the molten salt pump assembly 7. The molten salt pump 5 may be a long shaft vertical pump.
In this embodiment, the molten salt inlet 71 of the molten salt pump assembly 7 is disposed at a position close to the storage tank foundation 1, thereby improving the utilization rate of the molten salt in the storage apparatus body 100.
Preferably, the molten salt inlet 71 is provided in a plurality of numbers, and is uniformly arranged in the circumferential direction of the molten salt pump assembly 7. The greater the number of molten salt inlets 71, the faster the molten salt flows into the molten salt pump assembly 7, enabling the molten salt pump to operate more reliably. In this embodiment, it is ensured that the molten salt flows into the molten salt pump assembly 7 at a higher rate than the molten salt flows out. The size and number of the calibers of the molten salt inlet 71 depend on the design flow rate of the molten salt pump outlet.
Preferably, the molten salt inlet 71 is provided with a molten salt non-return device 8 to prevent the molten salt from flowing out of the molten salt pump assembly 7 under negative pressure. The molten salt non-return device 8 is positioned below the molten salt liquid level 6 and is arranged at the lower part of the molten salt pump assembly part 7, so that the molten salt pump assembly part 7 and the molten salt pump 5 form a relatively closed space.
Preferably, the molten salt non-return device 8 comprises a valve seat 10, a valve plate 11 and a rotating shaft 12, the valve seat 10 is arranged on the periphery of the molten salt inlet 71, the valve plate 11 covers the valve seat 10, the valve plate 11 is rotatably connected to the molten salt pump assembly 7 through the rotating shaft 12, and the molten salt inlet 71 is in an open state or a closed state when the valve plate 11 rotates.
Preferably, the molten salt non-return device 8 is disposed in the molten salt pump assembly 7, the valve seat 10 is an annular structure, the valve seat 10 is disposed around the molten salt inlet 71, the rotating shaft 12 is disposed at a predetermined position above the valve seat 10, so that the valve plate 11 rotates to open or close the molten salt inlet 71, and the valve plate 11 is disposed at a predetermined angle with respect to the molten salt liquid surface when in the closed state, so that the valve plate 11 is lifted and then sits back due to its own gravity, and referring to fig. 1 and 2, an included angle between the valve plate 11 and the molten salt liquid surface is 0 to 90 °. The valve plate 11 can be rotated by the rotating shaft 12 to abut against the valve seat 10 to bring the molten salt inlet 71 into a closed state, or the valve plate 11 is rotated away from the valve seat 10 to open the molten salt inlet 71. The valve plate 11 and the molten salt liquid level are configured to a preset angle in the closed state, so that the valve plate 11 can be lifted and then can be seated back by the gravity of the valve plate 11, the valve plate 11 and the valve seat 10 can be tightly attached, and the non-return effect of the molten salt non-return device 8 is guaranteed.
In this embodiment, the molten salt pump assembly 7 is provided with a negative pressure port 73, the negative pressure port 73 is connected to the negative pressure generating device 3, and when the negative pressure generating device 3 works, the receiving space in the molten salt pump assembly 7 generates negative pressure.
Specifically, the negative pressure port 72 is disposed at a predetermined position near the vault of the storage apparatus 100, and the negative pressure port 72 is connected and communicated with the negative pressure generating apparatus 3 through a pipeline, and the pipeline is provided with the valve 4. The negative pressure generating device 3 comprises a vacuum pump body 31, a speed change device 32 and an impeller device 33, wherein the impeller device 33 is connected with the vacuum pump body 31 through the speed change device 32, the impeller device 33 is installed on a molten salt descending pipeline 9 connected with an outlet of the heat absorber, the gravitational potential energy of the molten salt is driven to rotate by the lower part in the molten salt descending pipeline 9, and the vacuum pump body 31 is driven to work through the acceleration effect of the speed change device 32 so as to achieve the effect of vacuumizing. Wherein the impeller device 33 comprises an impeller arranged in the molten salt descending pipeline 9, and the speed changing device 32 can be arranged as a gearbox to play a role of acceleration. By arranging the impeller device 33 on the molten salt descending pipeline 9 at the outlet of the heat absorber, the gravitational potential energy of the molten salt in the descending pipeline is fully utilized, the impact of the molten salt on the pipeline and equipment is reduced, and meanwhile, the energy is further recycled.
The working process of the solar photothermal power station molten salt storage device of the embodiment is as follows:
when the molten salt liquid level of the storage device body 100 is high, the molten salt enters the molten salt pump assembly 7 from the molten salt inlet 71 due to the gravity of the molten salt, and at the moment, the molten salt pump 5 can work normally to pump out the molten salt; when the molten salt liquid level of the storage device body 100 reaches the lowest working liquid level of the molten salt pump 5, the molten salt pump 5 cannot normally work, the negative pressure generating device 3 is started to generate negative pressure inside the molten salt pump assembly part 7, the molten salt in the storage device body 100 enters the molten salt pump assembly part 7 from the molten salt inlet 71 under the action of pressure difference, so that the molten salt liquid level in the molten salt pump assembly part 7 is higher than the lowest starting liquid level of the molten salt pump 5, and the molten salt pump 5 can normally work to pump out the molten salt.
Through the negative pressure that negative pressure generating device 3 formed in molten salt pump assembly part 7, reduced because of the molten salt pump the minimum working liquid level and the fused salt loss that causes, greatly reduced the inside fused salt quality that can not utilize of storage device body 100, increased the utilization ratio, improved economic nature.
The foregoing disclosure is only directed to the preferred embodiments of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. The utility model provides a solar energy light and heat power station fused salt storage device which characterized in that includes:
a storage device body for storing molten salt;
the storage device comprises a storage device body and is characterized in that at least one molten salt pump assembly part is arranged in the storage device body, an accommodating space for accommodating a molten salt pump and molten salt is formed inside the molten salt pump assembly part, the molten salt pump assembly part is provided with at least one molten salt inlet, the molten salt inlet extends to the position below the lowest working liquid level of the molten salt pump, and the radial size of the accommodating space is smaller than that of the storage device body;
the molten salt pump assembly part is provided with a negative pressure interface, the negative pressure interface is connected with a negative pressure generating device, and the negative pressure generating device works to form negative pressure in the molten salt pump assembly part;
the negative pressure generating device comprises a vacuum pump body, a speed change device and an impeller device, the impeller device is connected with the vacuum pump body through the speed change device, the impeller device is installed on a molten salt descending pipeline connected with an outlet of the heat absorber, the gravitational potential energy of molten salt is driven to rotate by the falling of the molten salt in the molten salt descending pipeline, and the vacuum pump body is driven to work through the acceleration effect of the speed change device to achieve the effect of vacuumizing;
when the molten salt in the storage device body reaches the lowest working liquid level of the molten salt pump, negative pressure is formed in the accommodating space of the molten salt pump assembly part, so that the molten salt in the storage device body flows into the molten salt pump assembly part from the molten salt inlet under the action of pressure difference, and then is pumped out of the storage device body through the molten salt pump assembled in the accommodating space, and therefore molten salt loss caused by the lowest working liquid level of the molten salt pump is reduced.
2. The solar photothermal power station molten salt storage device according to claim 1, wherein the molten salt pump assembly is assembled on the top of the storage device body, and the molten salt pump assembly is provided with at least one molten salt pump assembly port, each molten salt pump assembly port is provided with a molten salt pump, and each molten salt pump is in sealed connection with the molten salt pump assembly member.
3. The solar photothermal power station molten salt storage device according to claim 1 or 2, wherein a plurality of molten salt inlets are provided, and are uniformly arranged in the circumferential direction of the molten salt pump assembly.
4. The solar photothermal power station molten salt storage device according to claim 1 or 2, wherein the molten salt inlet is provided with a molten salt non-return device.
5. The solar optothermal power station molten salt storage device of claim 4, wherein the molten salt non-return device comprises a valve seat, a valve plate and a rotating shaft, the valve seat is arranged on the periphery of the molten salt inlet, the valve plate covers the valve seat, the valve plate is rotatably connected to the molten salt pump assembly through the rotating shaft, and the valve plate enables the molten salt inlet to be in an open state or a closed state when rotating.
6. The fused salt storage device of the solar photothermal power station of claim 5, wherein the fused salt non-return device is disposed in the fused salt pump assembly, the valve seat is of an annular structure, the valve seat is sleeved on the periphery of the fused salt inlet, the rotating shaft is disposed at a predetermined position above the valve seat, so that the valve plate rotates to open or close the fused salt inlet, and the valve plate forms a predetermined angle with the molten salt liquid level when in a closed state, so that the valve plate is lifted and then sits back due to its own gravity.
7. A molten salt storage system comprising the solar photothermal power station molten salt storage device of any one of claims 1-6.
8. A solar thermal power station comprising the solar thermal power station molten salt storage device of any one of claims 1-6 or the molten salt storage system of claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011204286.7A CN112393447B (en) | 2020-11-02 | 2020-11-02 | Solar energy light and heat power station fused salt storage device, storage system and light and heat power station |
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| CN202011204286.7A CN112393447B (en) | 2020-11-02 | 2020-11-02 | Solar energy light and heat power station fused salt storage device, storage system and light and heat power station |
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| CN113154923B (en) * | 2021-04-27 | 2022-05-17 | 中国电建集团江西装备有限公司 | Molten salt heat storage tank and manufacturing method thereof |
| CN113883731B (en) * | 2021-09-17 | 2024-05-24 | 浙江可胜技术股份有限公司 | Heat storage system |
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2020
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Address after: 310018 1-2603, No. 501, No. 2 street, Baiyang street, Hangzhou Economic and Technological Development Zone, Zhejiang Province Applicant after: Zhejiang Kesheng Technology Co.,Ltd. Address before: 310053 8 and 9 floors of No. 307 Liuhe Road, Binjiang District, Hangzhou City, Zhejiang Province Applicant before: ZHEJIANG SUPCON SOLAR ENERGY TECHNOLOGY Co.,Ltd. |
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