阅读说明：本技术 一种太阳能光热发电用熔盐储罐 (Fused salt storage tank for solar photo-thermal power generation ) 是由 郗航 张瑞刚 谢小军 吴琼 杨博 刘增博 刘乾 于 2021-02-01 设计创作，主要内容包括：本发明公开了一种太阳能光热发电用熔盐储罐,罐体的顶部设置有罐顶板；罐顶板的一侧嵌入设置有预热进风管,另一侧设置有出风管,出风管通过管道与循环泵的进风端连接,循环泵的出风端通过管道与预热进风管连接；罐体的外部设置有保温组件,罐顶板上对应设置有注盐管和出盐管,出盐管内设置有温度传感器。本发明能够充分的从外部实现对于罐体的保温,从而减少对于罐体结构的破坏,增加罐体结构的强度,并且在节省能源的情况下,有效的保障了对于熔盐的温度保持,提高了设备运行的稳定性。(The invention discloses a fused salt storage tank for solar photo-thermal power generation, wherein a tank top plate is arranged at the top of a tank body; a preheating air inlet pipe is embedded in one side of the tank top plate, an air outlet pipe is arranged on the other side of the tank top plate, the air outlet pipe is connected with an air inlet end of the circulating pump through a pipeline, and an air outlet end of the circulating pump is connected with the preheating air inlet pipe through a pipeline; the outside of the tank body is provided with a heat preservation assembly, a salt injection pipe and a salt outlet pipe are correspondingly arranged on the tank top plate, and a temperature sensor is arranged in the salt outlet pipe. The invention can fully realize the heat preservation of the tank body from the outside, thereby reducing the damage to the tank body structure, increasing the strength of the tank body structure, effectively ensuring the temperature maintenance of the molten salt under the condition of saving energy, and improving the running stability of the equipment.)

1. A molten salt storage tank for solar photo-thermal power generation is characterized by comprising a tank body (1), wherein a tank top plate (4) is arranged at the top of the tank body (1); a preheating air inlet pipe (2) is embedded into one side of the tank top plate (4), an air outlet pipe (5) is arranged on the other side of the tank top plate, the air outlet pipe (5) is connected with an air inlet end of a circulating pump (8) through a pipeline, and an air outlet end of the circulating pump (8) is connected with the preheating air inlet pipe (2) through a pipeline; the outside of the tank body (1) is provided with a heat preservation assembly (7), a salt injection pipe (3) and a salt outlet pipe (6) are correspondingly arranged on the tank top plate (4), and a temperature sensor is arranged in the salt outlet pipe (6).

2. The molten salt storage tank for solar photo-thermal power generation according to claim 1, wherein a part of the salt outlet pipe (6) extending into the tank body (1) is provided with an inclined opening, and a detection end of the temperature sensor is placed at the inclined opening.

3. The molten salt storage tank for solar photo-thermal power generation according to claim 1, wherein the heat insulating member (7) includes: a base (72); the supporting ring plate (71) is connected between the base (72) and the bottom of the tank body (1), so that a liquid storage space is formed among the bottom of the tank body (1), the base (72) and the supporting ring plate (71); the structure cylinder (73) is sleeved outside the tank body (1) and fixed on the base (72); the first sealing ring plate (75) is fixedly sealed at the top of the construction cylinder (73), and a heat preservation space is formed among the first sealing ring plate (75), the construction cylinder (73), the tank body (1), the base (72) and the supporting ring plate (71).

4. The molten salt storage tank for solar photo-thermal power generation according to claim 3, wherein a heating rod is provided in the liquid storage space, and heat insulating oil is stored; the liquid storage space is communicated with the heat preservation space through a pipeline, and one end of the pipeline positioned in the liquid storage space is connected with a suction pump; when the temperature sensor detects that the temperature of the molten salt in the salt pipe (6) is lower than a threshold value, the heating rod and the suction pump are started.

5. The molten salt storage tank for solar photo-thermal power generation according to claim 3, wherein a first distance meter (10) for measuring the liquid level of the insulating oil is arranged on the first sealing ring plate (75), and a second distance meter (11) for measuring the liquid level of the molten salt is arranged on the tank top plate (4); the liquid level height of the heat preservation oil is 8-15 cm higher than that of the molten salt.

6. The molten salt storage tank for solar photo-thermal power generation according to claim 3, wherein the base (72) is fixed at the bottom of the concrete foundation (12) by adopting a plurality of groups of lifting blocks (77), the cross section of the concrete foundation (12) is of a concave structure, and the top of the concrete foundation (12) is provided with a detachable partition plate (13).

7. The molten salt storage tank for solar photothermal power according to claim 3, wherein a heat insulation cylinder (74) is sleeved outside the construction cylinder (73), the heat insulation cylinder (74) is placed on the concrete foundation (12), the top of the heat insulation cylinder (74) is located below the first sealing ring plate (75), and the heat insulation cylinder (74) and the construction cylinder (73) are hermetically connected through the second sealing ring plate (76), so that a sealed vacuum space is formed among the heat insulation cylinder (74), the construction cylinder (73), the first sealing ring plate (75) and the second sealing ring plate (76).

8. The molten salt storage tank for solar photothermal power according to claim 7, wherein a plurality of sets of annular support plates (78) are provided at intervals in the sealed vacuum space.

9. The molten salt storage tank for solar photo-thermal power generation according to claim 1, wherein the salt injection pipe (3) is connected with the liquid collection barrel (15) through an L-shaped connecting pipe (14), the liquid outlet end of the liquid collection barrel (15) is connected with the intercepting barrel (16), the liquid spraying barrel (17) is sleeved outside the liquid collection barrel (15) and the intercepting barrel (16), and a plurality of liquid spraying holes (19) are formed in the liquid spraying barrel (17) at intervals; the liquid spraying cylinder (17) is also provided with a heat conductor (18), and one end of the heat conductor (18) extends into the intercepting cylinder (16).

10. The molten salt storage tank for solar photo-thermal power generation according to claim 1, wherein a temperature controller (9) is embedded at an air inlet end of the circulating pump (8).

Technical Field

The invention belongs to the technical field of fused salt storage tanks, and particularly relates to a fused salt storage tank for solar photo-thermal power generation.

Background

The solar power generation technology comprises photovoltaic power generation and photo-thermal power generation, wherein the photo-thermal power generation is to adjust the unstable influence of a power grid caused by unstable solar energy by adding a heat storage system, common heat storage systems include dual-tank heat storage systems and single-tank heat storage systems, both dual-tank heat storage systems and single-tank heat storage systems, the molten salt is used as a reliable medium, the lowest temperature of the molten salt is required to ensure that the molten salt is not solidified, otherwise, more energy is required for restarting, and the solidification of the molten salt can damage the molten salt storage tank, the heat preservation effect of the existing molten salt storage tank is poor, and partial devices are used for improving the heat preservation effect, the heating device is additionally arranged in the tank body, on one hand, the heating device is easy to damage due to the extension of the heating device, on the other hand, the structural strength of the tank body is reduced due to the additional heating device, and in addition, more energy is consumed due to the adoption of an external heat preservation device.

Therefore, it is necessary to provide a molten salt storage tank for solar photo-thermal power generation to solve the problems in the background art.

Disclosure of Invention

The invention aims to solve the technical problem of providing a fused salt storage tank for solar photo-thermal power generation aiming at the defects in the prior art, effectively ensuring the temperature maintenance of fused salt and improving the running stability of equipment under the condition of saving energy.

The invention adopts the following technical scheme:

a molten salt storage tank for solar photo-thermal power generation is characterized by comprising a tank body, wherein a tank top plate is arranged at the top of the tank body; a preheating air inlet pipe is embedded in one side of the tank top plate, an air outlet pipe is arranged on the other side of the tank top plate, the air outlet pipe is connected with an air inlet end of the circulating pump through a pipeline, and an air outlet end of the circulating pump is connected with the preheating air inlet pipe through a pipeline; the outside of the tank body is provided with a heat preservation assembly, a salt injection pipe and a salt outlet pipe are correspondingly arranged on the tank top plate, and a temperature sensor is arranged in the salt outlet pipe.

Specifically, the part of the salt outlet pipe extending into the tank body is provided with an oblique opening, and the detection end of the temperature sensor is placed at the oblique opening.

Specifically, the heat preservation subassembly includes: a base; the supporting ring plate is connected between the base and the bottom of the tank body, so that a liquid storage space is formed among the bottom of the tank body, the base and the supporting ring plate; the structure cylinder is sleeved outside the tank body and fixed on the base; the first sealing ring plate is fixedly sealed at the top of the construction barrel, and a heat preservation space is formed among the first sealing ring plate, the construction barrel, the tank body, the base and the supporting ring plate.

Further, a heating rod is arranged in the liquid storage space, and heat preservation oil is stored in the liquid storage space; the liquid storage space is communicated with the heat preservation space through a pipeline, and one end of the pipeline positioned in the liquid storage space is connected with a suction pump; and when the temperature sensor detects that the temperature of the molten salt in the salt pipe is lower than a threshold value, the heating rod and the suction pump are started.

Furthermore, a first distance meter for measuring the liquid level of the heat preservation oil is arranged on the first sealing ring plate, and a second distance meter for measuring the liquid level of the molten salt is arranged on the tank top plate; the liquid level height of the heat preservation oil is 8-15 cm higher than that of the molten salt.

Furthermore, the base adopts the multiunit lifting piece to fix in the bottom of concrete foundation, and the cross section of concrete foundation is concave structure, and the top of concrete foundation is provided with the detachable baffle.

Further, the outside cover of a structure section of thick bamboo is equipped with a thermal-insulated section of thick bamboo, and a thermal-insulated section of thick bamboo is placed on the concrete ground, and a thermal-insulated top of a section of thick bamboo is located the below of first sealed crown plate, through second sealed crown plate sealing connection between a thermal-insulated section of thick bamboo and the structure section of thick bamboo for construct sealed vacuum space between a thermal-insulated section of thick bamboo, a structure section of thick bamboo, first sealed crown plate and the second sealed crown plate.

Furthermore, a plurality of groups of annular supporting plates are arranged in the sealed vacuum space at intervals.

Specifically, the salt injection pipe is connected with the liquid collecting barrel through an L-shaped connecting pipe, the liquid outlet end of the liquid collecting barrel is connected with the intercepting barrel, liquid spraying barrels are sleeved outside the liquid collecting barrel and the intercepting barrel, and a plurality of liquid spraying holes are formed in the liquid spraying barrels at intervals; and a heat conductor is also arranged on the liquid spraying cylinder, and one end of the heat conductor extends into the intercepting cylinder.

Specifically, the temperature controller is embedded at the air inlet end of the circulating pump.

Compared with the prior art, the invention has at least the following beneficial effects:

according to the molten salt storage tank for solar photo-thermal power generation, the circulating preheating structure is formed by the circulating pump, the preheating air inlet pipe and the air outlet pipe, so that the freezing and blocking accidents of the molten salt storage tank during starting can be avoided, the running stability of equipment is improved, energy is saved, and the temperature of molten salt liquid of the molten salt storage tank can be effectively guaranteed.

Furthermore, the salt outlet temperature at the salt pipe can be monitored in real time by using a temperature sensor.

Further, the heat preservation subassembly that sets up can be followed the outside and realized the heat preservation to the jar body, reduces the destruction to jar body structure, improves the intensity and the life of the jar body.

Further, when the temperature sensor monitors that the temperature of the molten salt in the salt outlet pipe is lower than the threshold value during operation, the conveying action of the salt outlet pipe is stopped, the heating rod and the suction pump are started to conduct heat preservation on the tank body through heat preservation oil, the lowest temperature of the molten salt in the molten state is maintained, and the molten salt is guaranteed not to be solidified.

Furthermore, through the measurement of the first distance meter and the second distance meter, the liquid level height of the heat preservation oil is kept 8-15 cm higher than the liquid level height of the molten salt, and the temperature of the molten salt is effectively kept while energy is saved.

Further, carry out the lifting with the base through the lifting piece, avoid the base direct and concrete foundation contact, reduce calorific loss, prevent the influence of the moisture regain of concrete foundation to the base.

Further, the heat transfer can be further reduced by configuring the heat insulation cylinder, the configuration cylinder, the first sealing ring plate and the second sealing ring plate to be a sealed vacuum space.

Furthermore, a plurality of groups of annular supporting plates are arranged in the sealed vacuum space at intervals, so that the stability of the sealed vacuum space can be improved, the sealed vacuum space is separated, and the influence on other areas caused by the damage of the sealed vacuum space in a certain area can be reduced.

Furthermore, the liquid collecting barrel and the liquid spraying barrel can be used for enabling the reflowing molten salt to be uniformly sprayed out, and the heat conductor is used for transmitting higher temperature in the tank body to the liquid spraying barrel, so that preheating is realized.

Furthermore, the temperature controller can control the air inlet temperature of the circulating pump.

In conclusion, the invention can fully realize the heat preservation of the tank body from the outside, thereby reducing the damage to the tank body structure, increasing the strength of the tank body structure, effectively ensuring the temperature maintenance of the molten salt and improving the running stability of the equipment under the condition of saving energy.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of an insulation assembly of the present invention;

fig. 3 is a partially enlarged schematic view of fig. 2.

Wherein, 1, a tank body; 2. preheating an air inlet pipe; 3. a salt injection pipe; 4. a tank roof; 5. an air outlet pipe; 6. a salt outlet pipe; 7. a heat preservation assembly; 8. a circulation pump; 9. a temperature controller; 10. a first range finder; 11. a second rangefinder; 12. a concrete foundation; 13. a partition plate; 14. a connecting pipe; 15. a liquid collection cylinder; 16. an intercepting cylinder; 17. a liquid spraying cylinder; 18. a heat conductor; 19. a liquid ejection hole; 71. a support ring plate; 72. a base; 73. constructing a barrel; 74. a heat insulating cylinder; 75. a first seal ring plate; 76. a second seal ring plate; 77. lifting the block; 78. and a support plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

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, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 specific cases to those skilled in the art.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.

The invention provides a fused salt storage tank for solar photo-thermal power generation, which utilizes a circulating pump, a preheating air inlet pipe and an air outlet pipe to form a circulating preheating structure, can avoid freezing and blocking accidents of the fused salt storage tank during starting, and improves the running stability of equipment; in addition, when the temperature sensor monitors that the temperature of the molten salt in the salt pipe is lower than the threshold value during operation, the conveying action of the salt pipe is stopped, the heating rod and the suction pump are started to conduct heat preservation on the tank body through heat preservation oil, the lowest molten state temperature is maintained, the molten salt is guaranteed not to be solidified, the liquid level height of the heat preservation oil is kept higher than the liquid level height of the molten salt by 8-15 cm through measurement of the first distance meter and the second distance meter, energy is saved, and meanwhile the temperature of the molten salt is effectively guaranteed to be kept.

Referring to fig. 1, the molten salt storage tank for solar photo-thermal power generation of the present invention includes: the air-conditioning tank comprises a tank body 1, a preheating air inlet pipe 2, an air outlet pipe 5, a heat insulation assembly 7 and a circulating pump 8. A tank top plate 4 is fixed at the top of the tank body 1; the preheating air inlet pipe 2 is embedded in one side of the tank top plate 4, the air outlet pipe 5 is arranged on the other side of the tank top plate 4, the air outlet pipe 5 is connected with the air inlet end of the circulating pump 8 through a pipeline, and the air outlet end of the circulating pump 8 is connected with the preheating air inlet pipe 2 through a pipeline; the heat preservation assembly 7 is arranged outside the tank body 1 and can adaptively adjust the heat preservation range according to the amount of the molten salt in the tank body 1.

Wherein, still be provided with respectively on the tank deck 4 and annotate salt pipe 3 and go out salt pipe 6, the part that goes out salt pipe 6 and stretch into jar body 1 has seted up the bevel connection for place temperature sensor's detection end, and temperature sensor is connected with the controller electricity, utilizes temperature sensor to monitor the fused salt temperature in salt pipe 6, can control the fused salt temperature in jar body 1.

Referring to fig. 2, the heat-insulating assembly 7 includes a base 72, a support ring plate 71, a construction cylinder 73, and a first seal ring plate 75.

The supporting ring plate 71 is connected between the base 72 and the bottom of the tank 1, so that a liquid storage space is formed among the bottom of the tank 1, the base 72 and the supporting ring plate 71 and used for storing heat preservation liquid.

The structure cylinder 73 is sleeved outside the tank body 1 and fixed on the base 72.

The first sealing ring plate 75 is fixedly sealed on the top of the construction cylinder 73, and a heat preservation space is formed among the first sealing ring plate 75, the construction cylinder 73, the tank body 1, the base 72 and the supporting ring plate 71.

In a preferred embodiment, the liquid storage space stores heat preservation oil, the heat preservation oil is heated by a heating rod to maintain the temperature, and the heating rod is electrically connected with the controller.

The liquid storage space is communicated with the heat preservation space through a pipe body, one end of the pipe body positioned in the liquid storage space is communicated with the suction pump, so that the amount of heat preservation oil in the heat preservation space is adjusted through the suction pump, and the suction pump is electrically connected with the controller;

and when the temperature sensor monitors that the temperature of the molten salt in the salt outlet pipe 6 is lower than the threshold value, the conveying action of the salt outlet pipe 6 is stopped, the heating rod and the suction pump are started to carry out heat preservation on the tank body 1 by using heat preservation oil, the lowest molten state temperature is maintained, and the molten salt is guaranteed not to be solidified.

As a preferred embodiment, a second distance meter 11 fixed on the top plate 4 of the tank is arranged in the tank body 1 and used for measuring the liquid level height of the molten salt;

a first distance meter 10 fixed on the first sealing ring plate 75 is arranged in the heat-insulating space and used for measuring the liquid level height of the heat-insulating oil, and the first distance meter and the second distance meter are both electrically connected with the controller;

and when the heat preservation oil is used for heat preservation, the liquid level height of the heat preservation oil is kept 8-15 cm higher than that of the molten salt, so that the energy is saved, and the temperature of the molten salt is effectively kept.

In this embodiment, the base 72 is fixed to the bottom of the concrete foundation 12 by a plurality of sets of lifting blocks 77, the cross section of the concrete foundation 12 is concave, and the top of the concrete foundation 12 is detachably fixed with the partition 13.

In addition, an insulating cylinder 74 is sleeved outside the construction cylinder 73, the insulating cylinder 74 is placed on the concrete foundation 12, the top of the insulating cylinder 74 is fixed below the first sealing ring plate 75, and the insulating cylinder 74 and the construction cylinder 73 are connected in a sealing manner by using a second sealing ring plate 76, so that a sealed vacuum space is formed among the insulating cylinder 74, the construction cylinder 73, the first sealing ring plate 75 and the second sealing ring plate 76.

In addition, a plurality of groups of annular supporting plates 78 are adopted for separation and support in the sealed vacuum space, and the heat preservation effect is improved.

Referring to fig. 3, in the present embodiment, the salt injection tube 3 is connected to the liquid collection barrel 15 by using an L-shaped connection tube 14, a liquid outlet end of the liquid collection barrel 15 is communicated with the intercepting barrel 16, a liquid spraying barrel 17 is sleeved outside the liquid collection barrel 15 and the intercepting barrel 16, and a plurality of liquid spraying holes 19 are distributed on the liquid spraying barrel 17;

the liquid spraying cylinder 17 is also provided with a heat conductor 18 extending into the intercepting cylinder 16.

The air inlet end of the circulating pump 8 is also embedded with a temperature controller 9.

In conclusion, the circulating preheating structure is formed by the circulating pump, the preheating air inlet pipe and the air outlet pipe, so that the freezing and blocking accidents of the fused salt storage tank during starting can be avoided, and the running stability of equipment is improved; in addition, when the temperature sensor monitors that the temperature of the molten salt in the salt pipe is lower than the threshold value during operation, the conveying action of the salt pipe is stopped, the heating rod and the suction pump are started to conduct heat preservation on the tank body through heat preservation oil, the lowest molten state temperature is maintained, the molten salt is guaranteed not to be solidified, the liquid level height of the heat preservation oil is kept 8-15 cm higher than the liquid level height of the molten salt through measurement of the first distance meter and the second distance meter, energy is saved, and meanwhile the temperature of the molten salt is effectively guaranteed to be kept.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.