CN214058660U - Be used for large-scale fused salt storage tank bottoms device of light and heat power plant - Google Patents
Be used for large-scale fused salt storage tank bottoms device of light and heat power plant Download PDFInfo
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- CN214058660U CN214058660U CN202023336247.0U CN202023336247U CN214058660U CN 214058660 U CN214058660 U CN 214058660U CN 202023336247 U CN202023336247 U CN 202023336247U CN 214058660 U CN214058660 U CN 214058660U
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Abstract
The utility model provides a be used for large-scale fused salt storage tank bottoms device of light and heat power station, belongs to power station heat-retaining technical field, exists that the basis is complicated, the basic bearing capacity is uneven for solving current fused salt storage tank, easily produces local inhomogeneous settlement to lead to the problem of fused salt storage tank bottoms leakage risk easily to take place. The composite heat-insulating tank comprises a tank bottom steel reinforcing structure layer, a composite heat-insulating layer and a reinforced concrete layer which are sequentially arranged downwards; an annular wall structure is arranged on the bottom plate of the storage tank in the circumferential direction; the tank bottom steel reinforcing structure layer is composed of a plurality of supporting pieces, each supporting piece comprises I-shaped steel and a connecting channel steel, the upper ends of the I-shaped steel are fixedly connected through the connecting channel steel, and the supporting pieces are fixedly connected through connecting steel plates; arranging a seamless steel pipe layer in the reinforced concrete layer, and ventilating air in the seamless steel pipe layer; be provided with in the rampart structure and let out the leakage hole, let out leakage hole along rampart structure circumference evenly distributed, and from interior to exterior slope setting, let out the downthehole leakage pipeline that is provided with of leakage. The utility model is used for the medium is slot type and tower light and heat power station heat-retaining system of fused salt.
Description
Technical Field
The utility model relates to a be used for large-scale fused salt storage tank bottoms device of light and heat power station belongs to power station heat-retaining technical field.
Background
Solar thermal power generation technologies combined with energy storage devices have become an important form of renewable energy source for uninterruptible power supply. At the present stage, the solar-thermal power generation technology is rapidly developed, along with the continuous maturation and development of the molten salt heat storage technology, the scale of a molten salt heat storage system in engineering application is larger and larger, and the diameter of a molten salt storage tank of a conventional 50MW solar-thermal power station with the heat storage capacity of 7.5 hours is more than 40 meters. The molten salt storage tank is one of the most important devices in the heat storage system, and the quality of the heat preservation performance of the molten salt storage tank directly affects the stability and safety of the whole heat storage system and the economical efficiency of the operation of a power station.
Due to the particularity of the tank body base, the tank body base has heat insulation performance and needs to take compression resistance, load bearing and other effects into consideration. According to the current operation experience, most of photothermal power station's fused salt storage tank basis is complicated, adopt the composite foundation as many as 6 layers usually, and it is huge because of the storage tank diameter, the degree of difficulty of laying of tank bottoms heat preservation and insulation material has been increased again, the material on different layers is different, because of the expansion coefficient difference, can form mutual removal between different layers, the motion of the huge jar body of weight and jar interior fused salt, can cause different interlamination formation gaps, thereby lead to heat preservation effect and bearing capacity weak, consequently hardly guarantee tank bottoms temperature's homogeneity and thermal-insulated effect, especially can not guarantee the holistic rigidity of ground and subside the homogeneity, and then influence the safe operation of heat storage tank.
In conclusion, the existing molten salt storage tank has the problems that the foundation is complex, the bearing capacity of the foundation is uneven, and local non-uniform settlement is easily generated, so that the leakage risk is easily generated at the bottom of the molten salt storage tank, and the safe operation of a heat storage system cannot be ensured.
SUMMERY OF THE UTILITY MODEL
There is basic complicacy, basic bearing capacity uneven to current fused salt storage tank, easily produces local inhomogeneous settlement to lead to the problem of fused salt storage tank bottoms easy emergence leakage risk, the utility model provides a be used for large-scale fused salt storage tank bottoms device of light and heat power station.
The utility model relates to a tank bottom device for a large-scale fused salt storage tank of a photo-thermal power station, which comprises a tank bottom steel reinforcing structure layer, a composite heat preservation layer and a reinforced concrete layer which are arranged downwards from the tank bottom plate of the storage tank in sequence; an annular wall structure is arranged on the bottom plate of the storage tank in the circumferential direction;
the tank bottom steel reinforcing structure layer is composed of a plurality of supporting pieces, each supporting piece comprises I-shaped steel and a connecting channel steel, the upper ends of the I-shaped steel are fixedly connected through the connecting channel steel, and the supporting pieces are fixedly connected through connecting steel plates;
the composite heat-insulating layer comprises an upper ceramic sand heat-insulating layer and a lower coarse ceramic grain heat-insulating layer;
a seamless steel pipe layer is arranged in the reinforced concrete layer and is communicated with air;
be provided with in the rampart structure and let out the leakage hole, let out the leakage hole along rampart structure circumference evenly distributed, and from interior to exterior slope setting, let out the downthehole leakage pipeline that is provided with of leakage.
Preferably, the support piece of the tank bottom steel reinforcing structure layer further comprises a connecting bolt, the connecting channel steel is in a shape of a Chinese character 'men', the vertical section of the connecting channel steel is fixedly connected with the vertical section of the I-shaped steel through the connecting bolt,
preferably, the gaps between the support members of the steel reinforcing structure layer at the bottom of the tank are filled with ceramsite.
Preferably, the distance between the supporting pieces of the tank bottom steel reinforcing structure layer is less than or equal to 600 mm.
Preferably, the tank bottom steel reinforcing structure layer is arranged in an inclined mode, and the inclined angle is the same as that of a tank bottom plate of the storage tank.
Preferably, the aperture of the leakage hole is 50mm, and the distance between the leakage holes is 10 m.
The utility model has the advantages that: the utility model provides a be used for large-scale fused salt storage tank bottoms device of light and heat power station is applicable to slot type and tower light and heat power station heat-retaining system that the medium is the fused salt. This tank bottoms device can effectively improve the tank bottoms and warp, reduces the tank bottoms construction degree of difficulty, guarantees the homogeneity of tank bottoms temperature homogeneity and tank bottoms rigidity, has reduced the risk that the storage tank broke and leaks to improve the security and the stability of storage tank. In addition, the structure is simple, the construction is convenient, the complexity of the tank bottom foundation can be effectively improved, and the construction difficulty of the tank bottom foundation is greatly reduced; the rigidity of the tank bottom can be increased, the uneven stress condition of the tank bottom can be effectively improved, and the deformation resistance and the shock resistance of the tank bottom are enhanced; can effectively ensure the consistency of the temperature of the tank bottom and the consistency of uniform sedimentation. The method can be widely applied to a heat storage system of a power plant.
Drawings
FIG. 1 is a schematic diagram of the external structure of a tank bottom device for a large-scale molten salt storage tank of a photo-thermal power station;
FIG. 2 is a schematic structural diagram of a tank bottom device for a large-scale molten salt storage tank of a photo-thermal power station, according to the present invention;
FIG. 3 is a schematic structural diagram of a tank bottom steel reinforcing structure layer according to the present invention;
fig. 4 is a schematic structural diagram of the seamless steel pipe layer of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The first embodiment is as follows: the embodiment is described below with reference to fig. 1 to 4, and the tank bottom device for the large-scale molten salt storage tank of the photothermal power station in the embodiment comprises a tank bottom steel reinforcing structure layer 1, a composite insulating layer 2 and a reinforced concrete layer 3 which are arranged from the tank bottom plate of the storage tank downwards in sequence; an annular wall structure 4 is arranged on the circumferential direction of the bottom plate of the storage tank;
the tank bottom steel reinforcing structure layer 1 is composed of a plurality of supporting pieces, each supporting piece comprises I-shaped steel 1-1 and connecting channel steel 1-2, the upper ends of the I-shaped steel 1-1 are fixedly connected through the connecting channel steel 1-2, and the supporting pieces are fixedly connected through connecting steel plates 1-3;
the composite heat-insulating layer 2 comprises an upper ceramic sand heat-insulating layer 2-1 and a lower coarse ceramic grain heat-insulating layer 2-2;
a seamless steel pipe layer 3-1 is arranged in the reinforced concrete layer 3, and the seamless steel pipe layer 3-1 is ventilated with air;
the annular wall structure 4 is internally provided with leakage holes 4-1, the leakage holes 4-1 are uniformly distributed along the circumferential direction of the annular wall structure 4 and are obliquely arranged from inside to outside, and leakage pipelines are arranged in the leakage holes 4-1.
In this embodiment, tank bottoms steel additional strengthening layer 1 can effectively improve the uneven phenomenon of storage tank bottoms atress, increases the antidetonation of storage tank, anti settlement deformability.
In the embodiment, the supporting pieces are fixedly connected with one another through the connecting steel plates 1-3 to form a whole, so that the integrity and firmness of the tank bottom steel reinforcing structure layer 1 can be guaranteed, the tank bottom steel reinforcing structure layer 1 can effectively improve the phenomenon of uneven stress on the bottom of the storage tank, and the shock resistance and the anti-settling deformation capacity of the storage tank are improved.
In the embodiment, the composite heat-insulating layer 2 comprises an upper ceramic sand heat-insulating layer 2-1 and a lower coarse ceramic grain heat-insulating layer 2-2; the upper layer adopts light ceramic sand layer to replace the sand cushion layer of traditional basis, compares with traditional sand cushion layer, and light ceramic sand can greatly reduced basis dead weight alleviate the basis bearing capacity to have better thermal insulation performance and higher intensity than natural grit.
In this embodiment, the leak pipe is a stainless steel pipe. The hole bottom at the inlet of the leakage hole 4-1 is the same as the elevation of the bottom surface of the fine ceramic sand heat insulation layer and is arranged towards the outer side of the ring wall according to a certain gradient, and the reverse filter layer made of gravel and pebbles is arranged at the inlet of the leakage hole 4-1. The leakage hole 4-1 can effectively prevent liquid accumulation at the bottom of the tank, prevent the corrosion of the bottom of the tank and improve the service life and the safety performance of the storage tank.
In the embodiment, the reinforced concrete layer 3 is of a reinforced concrete structure, the thickness of the reinforced concrete layer is 100cm, a seamless steel pipe layer 3-1 is arranged at a position 30mm away from the top surface, a seamless steel pipe with the diameter of 100mm is adopted, the temperature of the tank bottom is guaranteed to be consistent by adjusting the inlet air quantity and the air speed, and the foundation safety of the tank bottom is guaranteed.
In this embodiment, reinforced concrete layer 3 and ring wall structure 4 adopt the mode of pouring, and compound heat preservation 2 adopts the mode of tamping, and such purpose is: the concrete foundation layer provides good stability, and a loading and tamping mode is adopted due to the fact that a temperature gradient exists from the bottom of the tank to the bottom of the tank, expansion coefficients of different materials are different, and reasonable settlement of the tank body is considered when the tank body is loaded.
Furthermore, the support piece of the tank bottom steel reinforcing structure layer 1 also comprises connecting bolts 1-4, the connecting channel steel 1-2 is in a shape of a Chinese character 'men', the vertical section of the connecting channel steel 1-2 is fixedly connected with the vertical section of the I-shaped steel 1-1 through the connecting bolts 1-4,
furthermore, the gaps between the supporting pieces of the tank bottom steel reinforcing structure layer 1 are filled with ceramsite.
Further, the distance between the supporting pieces of the tank bottom steel reinforcing structure layer 1 is less than or equal to 600 mm.
Further, tank bottoms steel reinforcing structure layer 1 slope setting, inclination is the same with the tank bottoms plate inclination of storage tank.
Furthermore, the aperture of the leakage hole 4-1 is 50mm, and the distance between the leakage holes 4-1 is 10 m.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (6)
1. A tank bottom device for a large-scale molten salt storage tank of a photo-thermal power station is characterized by comprising a tank bottom steel reinforcing structure layer (1), a composite heat insulation layer (2) and a reinforced concrete layer (3) which are arranged downwards from a tank bottom plate of the storage tank in sequence; an annular wall structure (4) is arranged on the bottom plate of the storage tank in the circumferential direction;
the tank bottom steel reinforcing structure layer (1) is composed of a plurality of supporting pieces, each supporting piece comprises an I-shaped steel (1-1) and a connecting channel steel (1-2), the upper ends of the I-shaped steels (1-1) are fixedly connected through the connecting channel steels (1-2), and the supporting pieces are fixedly connected through connecting steel plates (1-3);
the composite heat-insulating layer (2) comprises an upper ceramic sand heat-insulating layer (2-1) and a lower coarse ceramic grain heat-insulating layer (2-2);
a seamless steel pipe layer (3-1) is arranged in the reinforced concrete layer (3), and air is introduced into the seamless steel pipe layer (3-1);
be provided with in the rampart structure (4) and let out leakage hole (4-1), let out leakage hole (4-1) along rampart structure (4) circumference evenly distributed, and from interior to exterior slope setting, be provided with the leakage pipeline in leaking hole (4-1).
2. The tank bottom device for the large-scale molten salt storage tank of the photothermal power station according to claim 1, wherein the support member of the tank bottom steel reinforcing structure layer (1) further comprises a connecting bolt (1-4), the connecting channel steel (1-2) is in a door shape, and the vertical section of the connecting channel steel (1-2) is fixedly connected with the vertical section of the I-shaped steel (1-1) through the connecting bolt (1-4).
3. The tank bottom device for the large-scale molten salt storage tank of the photothermal power station according to claim 1, wherein the gaps between the support members of the steel reinforcing structure layer (1) at the tank bottom are filled with ceramsite.
4. A large molten salt storage tank bottom installation for a photo-thermal power plant according to any of claims 1-3, characterized in that the spacing between the supports of the steel reinforcing structural layer (1) of the tank bottom is less than or equal to 600 mm.
5. The large-scale molten salt storage tank bottom device for the photothermal power station according to claim 1, wherein the tank bottom steel reinforcing structure layer (1) is arranged in an inclined manner, and the inclined angle is the same as that of the tank bottom plate of the storage tank.
6. The tank bottom device for the large-scale molten salt storage tank of the photothermal power station according to claim 1, wherein the diameter of the leakage holes (4-1) is 50mm, and the distance between the leakage holes (4-1) is 10 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023336247.0U CN214058660U (en) | 2020-12-30 | 2020-12-30 | Be used for large-scale fused salt storage tank bottoms device of light and heat power plant |
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| CN202023336247.0U CN214058660U (en) | 2020-12-30 | 2020-12-30 | Be used for large-scale fused salt storage tank bottoms device of light and heat power plant |
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| CN214058660U true CN214058660U (en) | 2021-08-27 |
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| CN202023336247.0U Active CN214058660U (en) | 2020-12-30 | 2020-12-30 | Be used for large-scale fused salt storage tank bottoms device of light and heat power plant |
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