CN210285404U - Fused salt storage tank for solar photo-thermal power generation - Google Patents
Fused salt storage tank for solar photo-thermal power generation Download PDFInfo
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- CN210285404U CN210285404U CN201920454255.3U CN201920454255U CN210285404U CN 210285404 U CN210285404 U CN 210285404U CN 201920454255 U CN201920454255 U CN 201920454255U CN 210285404 U CN210285404 U CN 210285404U
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Abstract
The utility model discloses a fused salt storage tank for solar photo-thermal power generation, which comprises a tank top plate, a tank bottom plate, a tank wall plate, a salt injection pipeline and a heating device; the tank top plate, the tank bottom plate and the tank wall plate form a tank body; the salt injection pipeline comprises a down pipe and a distribution pipe, the down pipe is used for injecting molten salt, the down pipe is fixed on a tank top plate, the distribution pipe is installed at the bottom of the tank body, a plurality of salt outlets are arranged on the distribution pipe, openings of the salt outlets are increased along with the increase of the distance between the salt outlets and the down pipe, the opening of the salt outlet close to the down pipe is small, and the opening of the salt outlet far away from the down pipe is large; the heating device is an electric heating device and/or a hot air heating device. The utility model discloses an annotate salt pipeline structure setting, evenly distributed when making the fused salt pour into the storage tank into to combine heating device, make jar body temperature reach the requirement, avoid appearing the phenomenon of partially condensing of fused salt.
Description
Technical Field
The utility model relates to a solar energy power generation technical field, concretely relates to fused salt storage tank for solar photothermal power.
Background
The photothermal power station with heat storage can store partial heat through molten salt or other media while generating power in the daytime, and convert water into steam to drive a steam turbine to generate power through the stored heat at night, so that the power generation time can be prolonged, and more stable electric energy output can be provided.
The binary molten salt is used as a heat storage medium used by a conventional heat storage system, and has the advantages of high use temperature, good thermal stability and the like. But the freezing point of the molten salt is high, about 220 ℃. When DNI (Direct Normal Irradiance, Direct irradiation of sunlight from the sun disk to the surface orthogonal to the light path, called Direct irradiation) is low and insufficient heat storage occurs or during shutdown, molten salt solidification easily occurs, causing inconvenient salt feeding and even damaging the equipment, threatening the safe operation of the system. Particularly, when the molten salt storage tank is just put into use, when the molten salt is injected into the storage tank, if the molten salt is injected unevenly, the temperature distribution in the tank body is easily uneven, and further the operation fluctuation of the photo-thermal power station system is caused; in the stage that the molten salt storage tank is just put into use, if the temperature of the tank body does not meet the requirement, partial condensation of the molten salt can be caused.
Disclosure of Invention
In order to solve the problem, the utility model provides a fused salt storage tank for solar photothermal power sets up through annotating salt pipeline structure, evenly distributed when making the fused salt pour into the storage tank into.
The technical scheme of the utility model as follows:
a fused salt storage tank for solar photo-thermal power generation comprises a tank top plate, a tank bottom plate, a tank wall plate, a salt injection pipeline and a heating device; the tank top plate, the tank bottom plate and the tank wall plate form a tank body;
the salt injection pipeline comprises a down pipe and a distribution pipe, the down pipe is used for injecting molten salt, the down pipe is fixed on a tank top plate, the distribution pipe is installed at the bottom of the tank body, a plurality of salt outlets are arranged on the distribution pipe, openings of the salt outlets are increased along with the increase of the distance between the salt outlets and the down pipe, the opening of the salt outlet close to the down pipe is small, and the opening of the salt outlet far away from the down pipe is large;
the heating device is an electric heating device and/or a hot air heating device.
Preferably, the hot air heating device comprises an air inlet pipe and an air outlet chimney, the air inlet pipe is arranged on the tank top plate, and the air outlet chimney extends into the tank body from the tank top plate to the tank bottom plate.
Preferably, the electric heating device comprises an electric tracing heat and a thermocouple, and the electric tracing heat is arranged on the outer portions of the tank top plate and the tank wall plate and is used for heating the tank body; the thermocouple is arranged in the tank bottom plate, the tank wall plate and the storage tank, and is used for measuring the temperature distribution of the molten salt in the tank bottom plate, the tank wall plate and the storage tank.
Preferably, the heat preservation device is arranged on the outermost side of the tank body and is used for preserving heat of the tank body; the bottom of the tank body is provided with a bottom heat insulation layer.
Preferably, the tank wall plates form a cylinder, the tank top plate is located at the upper part of the cylinder formed by the tank wall plates, and the tank bottom plate is located at the lower part of the cylinder formed by the tank wall plates.
Preferably, the thickness of the wall plate of the tank is gradually reduced from bottom to top.
Preferably, the heat preservation device adopts an aluminum silicate fiberboard.
Preferably, the air outlet chimney is detachable, the air outlet chimney is of a cylindrical structure, and a plurality of air vents are formed in the bottom of the side wall of the air outlet chimney.
Preferably, the number of the vent holes arranged at the bottom of the side wall of the air outlet chimney is 4-8, and the diameter is 100-300 mm.
Compared with the prior art, the beneficial effects of the utility model are as follows:
firstly, the utility model has the advantages that through the structural design of the salt injection pipeline, the molten salt is injected into the storage tank and is uniformly distributed, and the temperature distribution of the molten salt in the storage tank is further uniform;
second, the utility model discloses a fused salt storage tank for solar photothermal power simple structure preheats effectually, and heating heat preservation is effectual, can prevent the solidification of fused salt.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
FIG. 1 is a schematic structural diagram of a molten salt storage tank for solar photo-thermal power generation;
FIG. 2 is a schematic view of an air outlet chimney;
FIG. 3 is a schematic view of a salt injection pipeline;
the labels in the figure are: 1-tank roof; 2-tank bottom plate; 3-tank wall panels; 4-electric tracing; 5-an air inlet pipe; 6-air outlet chimney; 61-a vent; 7-a thermocouple; 8-salt injection pipeline; 81-down comer; 82-a distribution pipe; 83-a salt outlet; 9-a heat preservation device; 10-bottom insulation layer.
Detailed Description
The present invention will be further described 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 practical applications, the improvement and adjustment made by those skilled in the art according to the present invention still belong to the protection scope of the present invention.
For better illustration of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings.
A fused salt storage tank for solar photo-thermal power generation comprises a tank top plate 1, a tank bottom plate 2, a tank wall plate 3, a salt injection pipeline 8 and a heating device; the tank top plate 1, the tank bottom plate 2 and the tank wall plate 3 form a tank body;
the salt injection pipeline 8 comprises a down pipe 81 and a distribution pipe 82, the down pipe 81 is used for injecting molten salt, the distribution pipe 82 is installed at the bottom of the tank body, a plurality of salt outlets 83 are arranged on the distribution pipe 82, the openings of the salt outlets 83 are increased along with the increase of the distance between the salt outlets 83 and the down pipe 81, the openings of the salt outlets 83 close to the down pipe 81 are small, and the openings of the salt outlets 83 far away from the down pipe 81 are large;
the heating device is an electric heating device and/or a hot air heating device.
The present invention will be further described below with reference to specific embodiments.
Examples
As shown in fig. 1, the utility model relates to a fused salt storage tank for solar photothermal power, which comprises a tank top plate 1, a tank bottom plate 2, a tank wall plate 3, an electric tracing heat 4, an air inlet pipe 5, an air outlet chimney 6, a thermocouple 7, a salt injection pipeline 8, a heat preservation device 9 and a bottom heat insulation layer 10;
tank roof 1, tank bottom plate 2 and jar wallboard 3 constitute storage tank major structure. The cylinder is constituteed to jar wallboard 3, and jar roof 1 is located the upper portion of the cylinder that jar wallboard 3 is constituteed, and tank bottom plate 2 is located the lower part of the cylinder that jar wallboard 3 is constituteed. The tank top plate 1 is of a circular arch structure.
The electric tracing 4 is arranged outside the tank top plate 1 and the tank wall plate 3 and is used for heating the tank body; the heat preservation device 9 is arranged on the outer side of the electric tracing 4 and is used for preserving heat of the tank body; the thermocouples 7 are distributed at all positions of the storage tank body and used for measuring the temperature distribution of the molten salt in the tank bottom plate 2, the tank wall plate 3 and the storage tank. Of course, thermocouples 7 may also be evenly distributed in the tank floor 2, wall panels 3 and storage tank of the storage tank body as required to more accurately monitor the molten salt temperature distribution.
The cylinder is constituteed to the jar wallboard, the jar roof is located the upper portion of the cylinder that the jar wallboard is constituteed, the tank bottoms board is located the lower part of the cylinder that the jar wallboard is constituteed. The thickness of the tank wall plate is gradually reduced from bottom to top. The fused salt stored in the fused salt storage tank is about 5000-10000 tons, and a huge amount of fused salt has strong acting force on the wall plate. By adopting the cylindrical structure, the acting force of the fused salt on the wall plate can be uniformly distributed on the section with the same height, and the phenomenon of overlarge local stress is prevented. The wallboard reduces gradually from bottom to top, and the structure that wallboard thickness thins gradually from bottom to top is adopted to the jar wallboard, can compromise economic nature and the security of building the fused salt storage tank.
Before the molten salt is injected, opening the electric tracing 4 and introducing high-temperature air through the air inlet pipe 5 to raise the temperature of the tank body to be more than 300 ℃, and enabling the air to flow out of the tank body through the air outlet chimney 6; the molten salt is uniformly injected into the tank body through the salt injection pipeline 8.
The air inlet pipe 5 of the large-diameter molten salt tank is used for guiding the flowing of the air inlet direction, an air supply outlet of the air inlet pipe 5 is designed into a tangential centrifugal screw-in mode to form a hot air vortex, the wall plate 3 of the storage tank is heated, and the hot air at the top is gradually collected and the top plate of the storage tank and the upper part of the storage tank are gradually preheated. Along with the gathering of hot-blast, jar body upper portion pressure increase, along with the hot-blast gradual compression in upper portion, the air of jar body lower part is discharged from air-out chimney 6 in the jar body gradually, and the whole jar of body of hot-blast completion is preheated the storage tank to the final hot-blast full of.
The bottom of the tank body is provided with a bottom heat insulation layer 10, and the heat preservation device 9 adopts an aluminum silicate fiberboard to reduce heat loss.
As shown in fig. 2, an outlet chimney is provided. The air outlet chimney 6 is of a cylindrical structure, and 4-8 vent holes 61 with the diameter of 100-300mm are formed in the bottom of the side wall of the air outlet chimney. The air outlet chimney 6 is detachable, and the air outlet chimney 6 is placed into the tank body from the opening of the tank top plate until the tank bottom plate 2 is reached during use. When the high-temperature air heats the tank body, the air outlet chimney 6 is sent into the tank body from the opening on the tank top plate, and the air heated by the tank body flows out of the tank body through the air outlet chimney 6. And (3) heating the tank body to be above 300 ℃, and then extracting the air outlet chimney 6 from the top plate of the tank. Through installing this air-out chimney 6 additional, can prevent that high temperature air from directly following jar roof trompil department directly flowing out, thereby make high temperature air follow the ventilation hole 61 entering ventilation chimney of 6 bottoms of air-out chimney and flow out jar body, can make high temperature air have good heating effect to jar body. 4-8 vent holes with the thickness of 100 and 300mm can ensure smaller air outlet resistance and ensure smooth air outlet; but also can ensure that the bottom of the air outlet chimney has enough strength to support the weight of the whole air outlet chimney.
As shown in fig. 3, the salt injection pipeline 8 is composed of a molten salt descending pipe 81 and a distribution pipe 82, the descending pipe 81 is fixed on the top plate 1 of the tank, the distribution pipe 82 is installed at the bottom of the tank body, the distribution pipe is provided with a salt outlet 83, the opening of the salt outlet 83 near the descending pipe 81 is smaller, and the opening of the salt outlet 83 far away from the descending pipe 81 is larger, so as to ensure that the flow rates of the molten salt flowing out from different salt outlets 83 in the distribution pipe 82 are the same. Molten salt enters the distribution pipe 82 along the descending pipe 81 and enters the molten salt storage tank through the salt outlet 83 on the distribution pipe 82, and the distribution of the high-temperature molten salt entering the molten salt storage tank can be uniform through the distribution pipe. In order to make the molten salt flow out more uniformly, the included angle between the distribution pipe and the downcomer is preferably controlled to be 60-90 degrees.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present 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 its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. A fused salt storage tank for solar photo-thermal power generation comprises a tank top plate, a tank bottom plate, a tank wall plate, a salt injection pipeline and a heating device; the tank top plate, the tank bottom plate and the tank wall plate form a tank body; it is characterized in that the preparation method is characterized in that,
the salt injection pipeline comprises a down pipe and a distribution pipe, the down pipe is used for injecting molten salt, the down pipe is fixed on a tank top plate, the distribution pipe is installed at the bottom of the tank body, a plurality of salt outlets are arranged on the distribution pipe, openings of the salt outlets are increased along with the increase of the distance between the salt outlets and the down pipe, the opening of the salt outlet close to the down pipe is small, and the opening of the salt outlet far away from the down pipe is large;
the heating device is an electric heating device and/or a hot air heating device.
2. The molten salt storage tank for solar photo-thermal power generation according to claim 1, wherein the hot air heating device comprises an air inlet pipe and an air outlet chimney, the air inlet pipe is arranged on the tank top plate, and the air outlet chimney extends into the tank body from the tank top plate to the tank bottom plate.
3. The molten salt storage tank for solar photo-thermal power generation according to claim 1, wherein the electric heating device comprises an electric tracing and a thermocouple, and the electric tracing is mounted on the top tank plate and outside the tank wall plate to heat the tank body; the thermocouple is arranged in the tank bottom plate, the tank wall plate and the storage tank, and is used for measuring the temperature distribution of the molten salt in the tank bottom plate, the tank wall plate and the storage tank.
4. The molten salt storage tank for solar photo-thermal power generation according to claim 1, further comprising a heat preservation device arranged on the outermost side of the tank body to preserve heat of the tank body; the bottom of the tank body is provided with a bottom heat insulation layer.
5. The molten salt storage tank for solar photothermal power according to claim 1, wherein the tank wall panels constitute a cylinder, the tank top panel is located at an upper portion of the cylinder constituted by the tank wall panels, and the tank bottom panel is located at a lower portion of the cylinder constituted by the tank wall panels.
6. The molten salt storage tank for solar photo-thermal power generation according to claim 1, wherein the tank wall panel is gradually thinner in wall panel thickness from bottom to top.
7. The molten salt storage tank for solar photo-thermal power generation according to claim 4, wherein the heat preservation device is made of an aluminum silicate fiberboard.
8. The molten salt storage tank for solar photothermal power of claim 2, wherein the air outlet chimney is detachable, the air outlet chimney is of a cylindrical structure, and a plurality of vent holes are formed in the bottom of the side wall of the air outlet chimney.
9. The molten salt storage tank for solar photothermal power of claim 8, wherein the number of the vent holes arranged at the bottom of the side wall of the air outlet chimney is 4-8, and the diameter is 100-300 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920454255.3U CN210285404U (en) | 2019-04-04 | 2019-04-04 | Fused salt storage tank for solar photo-thermal power generation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920454255.3U CN210285404U (en) | 2019-04-04 | 2019-04-04 | Fused salt storage tank for solar photo-thermal power generation |
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| CN210285404U true CN210285404U (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251663A (en) * | 2021-05-19 | 2021-08-13 | 中国电建集团江西装备有限公司 | High-temperature molten salt storage tank preheating and heating device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251663A (en) * | 2021-05-19 | 2021-08-13 | 中国电建集团江西装备有限公司 | High-temperature molten salt storage tank preheating and heating device and method |
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