CN212742612U - Large-diameter high-temperature molten salt storage tank composite foundation - Google Patents
Large-diameter high-temperature molten salt storage tank composite foundation Download PDFInfo
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- CN212742612U CN212742612U CN202021017461.7U CN202021017461U CN212742612U CN 212742612 U CN212742612 U CN 212742612U CN 202021017461 U CN202021017461 U CN 202021017461U CN 212742612 U CN212742612 U CN 212742612U
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Abstract
The utility model provides a major diameter high temperature fused salt storage tank combined type basis, including becoming rigidity roof, rigidity bottom plate and outer rampart, become rigidity roof and meet with outer rampart upper portion, rigidity bottom plate and outer rampart are integrative to be pour, become the rigidity roof and hug closely the storage tank bottom, become to be equipped with outer heat preservation between rigidity roof and the outer rampart, become to be equipped with intermediate thermal packing layer between rigidity roof and the rigidity bottom plate, intermediate thermal packing layer is equipped with the branch storehouse girder steel along vertical direction equidistant. The utility model discloses a become vertical pressure of fused salt in the load and the storage tank of rigidity toper roof and special-shaped ring beam direct undertake tank deck, jar wall and jar body heat preservation, undertake all vertical loads and ground counter-forces through the rigidity bottom plate, undertake upper portion fused salt and thermal insulation material's lateral pressure through outer ring wall, the middle thermal-insulated filling layer realizes thermal-insulated heat preservation, and each part divides the worker clearly and definitely, and the collaborative work is one kind can satisfy bearing, heat preservation in the novel combined type basis of an organic whole to major diameter high temperature fused salt storage tank.
Description
Technical Field
The utility model belongs to the technical field of heat storage type major diameter storage tank foundation structure, concretely relates to all kinds of major diameter high temperature fused salt storage tank combined type basis.
Background
A steel storage tank foundation belongs to the field of petrochemical engineering conventional energy structure major, but in the field of new energy, particularly in a tower-type solar photo-thermal power station, a storage tank foundation capable of storing heat and storing heat in a lasting and efficient mode needs to be provided. The existing basic standard contents of related storage tanks are slightly thin, design elements are not considered comprehensively, the application range is too narrow, and with the vigorous development and application of the state to new energy technology, the requirements of high-efficiency heat preservation and heat insulation performance are provided for the steel storage tank foundation at normal temperature. At present, the photo-thermal power station in China has two major difficulties and problems in the design aspect of the large-scale high-temperature storage tank foundation:
firstly, the liquid fused salt is high-efficient to store up the heat in the storage tank, in order to guarantee the generating efficiency of power plant, liquid fused salt after standing for 24 hours, its temperature drop does not exceed the requirement of 1 ℃, has proposed the strict thermal-insulated requirement of keeping warm to the basis of direct and storage tank bottom plate contact, not only will satisfy the temperature field heat exchange calculation, and the insulation material of selection will participate in atress and deformation in addition.
Secondly, the economy of the storage tank foundation and the operability of construction, the cost of the selected heat insulation material is economical, the construction can be convenient and quick in construction measures, and the overall cooperativity of the foundation bottom plate, the top plate and the heat insulation material is ensured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a major diameter high temperature fused salt storage tank combined type basis overcomes the above-mentioned technical problem who exists among the prior art.
Therefore, the utility model provides a technical scheme as follows:
the large-diameter high-temperature molten salt storage tank composite foundation comprises a variable-rigidity top plate, a rigid bottom plate and an outer ring wall, wherein the variable-rigidity top plate is connected with the upper portion of the outer ring wall, the rigid bottom plate and the outer ring wall are integrally poured, the variable-rigidity top plate is tightly attached to the bottom of a storage tank, an outer heat insulation layer is arranged between the variable-rigidity top plate and the outer ring wall, a middle heat insulation filling layer is arranged between the variable-rigidity top plate and the rigid bottom plate, and bin steel beams are arranged on the middle heat insulation filling layer at equal intervals in the vertical direction.
The variable-rigidity top plate comprises a special-shaped ring beam and a conical top plate, the conical top plate is a variable-thickness plate, the conical top plate is fixedly arranged at the inner ring of the special-shaped ring beam, the special-shaped ring beam is arranged below the tank wall of the storage tank, and the conical top plate is tightly attached to the bottom plate of the storage tank.
The temperature measuring device is characterized in that a temperature measuring layer is arranged in the rigid bottom plate, a plurality of thermocouples are uniformly embedded in the temperature measuring layer, a plurality of ventilation pipes are arranged below the temperature measuring layer, thermocouple electric signals are connected with a control cabinet, the control cabinet is electrically connected with a fan and an alarm, and one end of each ventilation pipe is communicated with an air outlet of the fan.
The rigid bottom plate is a reinforced concrete circular bottom plate, and annular and radial reinforcing steel bars are arranged in the rigid bottom plate.
The middle heat-insulating filling layer comprises shale ceramsite and ceramic sand, the particle size of the shale ceramsite is 5-20mm, the particle size of the ceramic sand is not more than 3mm, and the mass ratio of the shale ceramsite to the ceramic sand is 7: 3.
The bin steel beams are vertically provided with three layers, and each layer is arranged in a hexagon shape.
The special-shaped ring beam is in a step shape, and the outer heat insulation layer between the special-shaped ring beam and the outer ring wall is in a step shape with a wide upper part and a narrow lower part.
The tapered top plate slopes upwards to the center of the storage tank by 1.5%, the thickness of the joint of the tapered top plate and the special-shaped ring beam is R1/100, and R1 is the radius of the storage tank.
The thickness of the conical top plate is 100-150mm, the thickness of the middle heat insulation filling layer is 1.5-2m, the thickness of the rigid bottom plate is 400-800mm, and the thickness of the outer ring wall is 500-600 mm.
The utility model has the advantages that:
the utility model provides a this kind of major diameter high temperature fused salt storage tank combined type basis directly undertakes the tank deck through becoming rigidity toper roof and special-shaped gird, the vertical pressure of fused salt in the load of jar wall and jar body heat preservation and the storage tank, undertake all vertical loads and ground counter-force through the rigidity bottom plate, undertake upper portion fused salt and thermal insulation material's lateral pressure through outer rampart, well thermal-insulated heat preservation is realized to the heat-insulating filling layer, each part divides the worker clearly and definitely, the collaborative work is a can satisfy bearing, keep warm in the novel combined type basis of an organic whole to major diameter high temperature fused salt storage tank.
The utility model discloses divide the storehouse girder steel along vertical setting in middle heat-insulating filling layer, with circular according to the isovolumic division several partitions, accomplish the control standard of "two even" on the simultaneous construction technology, realized the compactness of thermal-insulated bulk cargo designing requirement and the even settlement of the jar body.
The utility model provides a dysmorphism girl and limit rigidity roof, erect wall and bottom plate connection area at the storage tank, because erect the discontinuity of wall, under side direction fused salt pressure and high temperature dilatational strain's combined action, this regional stress sudden change, complicacy, the girl that has certain rigidity has undertaken the dilational strain of internal force and restriction jar wall well. Meanwhile, in the heat preservation performance, the outer heat preservation layer with the wide upper part and the narrow lower part is filled by the special-shaped ring beam and the outer ring wall, so that the loss of high heat flow density caused by the outward extension of the rigid bottom plate relative to the vertical wall is effectively reduced. The variable-thickness conical top plate is laid on the middle heat insulation filling layer and slopes upwards according to the gradient of 1.5%, and can be well adapted to vertical deformation of the upper molten salt. The combination of the strong ring beam and the weak top plate has the advantages of integral work, clear division of labor, and scientific and reasonable force transmission and heat conduction.
The middle heat-insulating filling layer adopts shale ceramisite and ceramic sand, meets the requirement of a thermosetting coupling calculation model, and completely meets the heat exchange calculation of the whole temperature field. In order to meet the caking property between the ceramic grains and the ceramic sand, the ceramic sand and the ceramic grains are mixed according to the ratio of 3:7 by combining the construction process of on-site large-diameter operation.
The rigid bottom plate and the outer ring wall are rigidly connected through integral casting, and the annular and radial reinforcing steel bars are arranged in the rigid bottom plate to bear the bending moment, the shearing force, the punching internal force and the like generated by the dead weight load, the live load, the wind load, the temperature action and the inclination of the tank body of the fused salt; the outer ring wall is used for bearing the total horizontal deformation of the foundation, simultaneously restrains the middle heat insulation layer, strengthens the integrity of the foundation and ensures that the foundation is uniformly settled.
If an accident condition occurs, when the temperature measured by the thermocouple reaches 60% -70% of the limit temperature of the concrete of the bottom plate, the alarm system works and starts the fan in time, air with low heat flux density is conveyed to the bottom plate by virtue of the ventilation pipe, heat is taken out, the strength reduction of the concrete of the bottom plate is effectively prevented, and the safety of the bearing capacity of the foundation is ensured.
The utility model discloses a combined type basis is applied to the Qinghai for the first time and merges 50MW photo-thermal power generation project (the first photo-thermal demonstration project of country), becomes rigidity roof, and middle insulating layer and rigid bottom plate and outer rampart work jointly, and the atress breaks through the restriction on conventional storage tank class basis in coordination, has solved the basic difficult problem of a series of major diameter high temperature storage tank. The utility model discloses a mainly have heat-resisting concrete, ordinary concrete and thermal-insulated granule dispersoid on the basis material, the purchase and the construction of the project of being convenient for can shorten construction period simultaneously, satisfy green engineering, can realize that single major diameter storage tank basis replaces the multi-diameter storage tank, reach the purpose of optimizing the place and arranging and practicing thrift the land used. The utility model discloses a combined type keeps warm, thermal-insulated basis has certain economic nature and reliable practicality in the light and heat power station engineering field at home and abroad, has wide application prospect in new forms of energy heat-retaining and heat accumulation field.
In order to make the above and other objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic plan view of the composite foundation structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the composite base structure of the present invention;
FIG. 3 is a schematic view of the variable stiffness top plate structure of FIG. 2;
FIG. 4 is a schematic view of one embodiment of a middle insulation filled layered sectional steel beam;
FIG. 5 is a schematic view of the connection structure of the outer annular wall and the rigid base plate;
fig. 6 is a schematic plan view of a vent tube.
In the figure:
description of reference numerals:
1. a conical top plate; 2. a special-shaped ring beam; 3. an intermediate thermal insulation filler layer; 4. dividing a bin steel beam; 5. an outer insulating layer; 6. a rigid chassis; 7. a vent pipe; 8. an outer annular wall; 9. temperature expansion joint; 10. a conical surface slope line; 11. and (4) storage tank.
Detailed Description
The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.
It should be noted that, in the present invention, the upper, lower, left, and right in the drawings are regarded as the upper, lower, left, and right of the composite foundation of the large-diameter high-temperature molten salt storage tank described in this specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the embodiment provides a large-diameter high-temperature molten salt storage tank composite foundation which comprises a variable-rigidity top plate, a rigid bottom plate 6 and an outer ring wall 8, wherein the variable-rigidity top plate is connected with the upper portion of the outer ring wall 8, the rigid bottom plate 6 and the outer ring wall 8 are integrally cast, the variable-rigidity top plate is tightly attached to the bottom of a storage tank 11, an outer heat insulation layer 5 is arranged between the variable-rigidity top plate and the outer ring wall 8, a middle heat insulation filling layer 3 is arranged between the variable-rigidity top plate and the rigid bottom plate 6, and bin steel beams 4 are arranged on the middle heat insulation filling layer 3 at equal intervals in the vertical direction.
The utility model provides a this kind of major diameter high temperature fused salt storage tank combined type basis directly undertakes the tank deck through becoming rigidity toper roof 1 and special-shaped gird 2, the vertical pressure of fused salt in the load of jar wall and jar body heat preservation and storage tank 11, undertake all vertical loads and ground counter-force through rigidity bottom plate 6, undertake the lateral pressure of upper portion fused salt and thermal insulation material through outer crown wall 8, well thermal-insulated heat preservation is realized to intermediate thermal-insulated filling layer 3, each part divides the worker clear and definite, the collaborative work is a novel combined type basis that can satisfy bearing major diameter high temperature fused salt storage tank 11, keep warm in an organic whole.
Example 2:
on the basis of embodiment 1, this embodiment provides a major diameter high temperature fused salt storage tank combined type basis, the roof that becomes rigidity includes special-shaped ring roof beam 2 and toper roof 1, toper roof 1 is the variable thickness board, toper roof 1 sets firmly in the inner circle of special-shaped ring roof beam 2, special-shaped ring roof beam 2 locates under the jar wall of storage tank 11, toper roof 1 hugs closely the storage tank 11 bottom plate. As shown in fig. 1 and 2.
In the figure, R0 is the radius of the conical surface, R1 is the radius of the storage tank 11, R2 is the radius of the ring beam, and R3 is the radius of the outer ring wall 8. When the variable-rigidity top plate is constructed, pouring is carried out in five parts, namely a cone at the central part and 4 sectors of 90 degrees at the circumferential direction of the cone, temperature expansion joints 9 are reserved between the cone and the 4 sectors, and the temperature expansion joints 9 are also reserved between two adjacent sectors.
The utility model discloses a load of tank deck, jar wall and jar body heat preservation is directly undertaken to dysmorphism gird 2, pastes storage tank 11 bottom plate through 1 boards of variable rigidity toper roof, directly undertakes the vertical pressure of fused salt in the storage tank 11.
Example 3:
on embodiment 1's basis, this embodiment provides a major diameter high temperature fused salt storage tank combined type basis, there is the temperature measurement layer in the rigidity bottom plate 6, evenly pre-buried a plurality of thermocouples in the temperature measurement layer, the temperature measurement layer has a plurality of ventilation pipes 7, and thermocouple electric signal connection has the switch board, the switch board electricity is connected with fan and alarm, and the one end of ventilation pipe 7 communicates with the air outlet of fan.
As shown in fig. 2 and 6, one end of the vent pipe 7 is 90 ° and is communicated with the air outlet of the fan. Temperature thermocouples are uniformly embedded in the circular bottom plate, the thermocouples are converged at one position at the edge of the base, and the ventilation pipe 7 is arranged below the thermocouple layer at the interval of 900 mm.
When the temperature measured by the thermocouple reaches 60% -70% of the limiting temperature of the bottom plate concrete, the alarm system works and starts the fan in time, air with low heat flux density is conveyed to the bottom plate by virtue of the ventilation pipe 7, heat is taken out, the strength of the bottom plate concrete is effectively prevented from being reduced, and the safety of foundation bearing capacity is ensured.
Example 4:
on the basis of embodiment 1, this embodiment provides a major diameter high temperature fused salt storage tank combined type basis, rigid bottom plate 6 is reinforced concrete circular bottom plate, be equipped with hoop and radial reinforcing bar in the rigid bottom plate 6.
As shown in fig. 5, the rigid bottom plate 6 and the outer ring wall 8 are integrally and rigidly connected by casting, and the annular and radial steel bars are arranged in the rigid bottom plate 6 to bear the dead weight load, live load, wind load, temperature action of molten salt, bending moment, shearing force, punching internal force and the like generated by the inclination of the tank body.
Example 5:
on the basis of embodiment 1, the embodiment provides a large-diameter high-temperature molten salt storage tank composite foundation, the middle-interval thermal filling layer 3 includes shale ceramsite and ceramic sand, the particle size of the shale ceramsite is 5-20mm, the particle size of the ceramic sand is not greater than 3mm, and the mass ratio of the shale ceramsite to the ceramic sand is 7: 3.
The utility model provides a cost is low, construction convenience's thermal-insulated bulk cargo aggregate that keeps warm, the bulk cargo adopts shale haydite and pottery sand, accords with the requirement of thermosetting coupling calculation model, satisfies the heat exchange of whole temperature field and calculates completely. The cylinder pressure intensity of the heat insulation bulk material is not lower than 5MPa, and the heat conductivity coefficient is not more than 0.45. In order to meet the caking property between the ceramic grains and the ceramic sand, the ceramic sand and the ceramic grains are mixed according to the ratio of 3:7 by combining the construction process of on-site large-diameter operation.
Example 6:
on the basis of embodiment 1, this embodiment provides a major diameter high temperature fused salt storage tank combined type basis, divide storehouse girder steel 4 vertical three layers of establishing altogether, every layer is the hexagon and arranges.
As shown in fig. 4, in the middle heat insulation filling layer 3, a regular hexagonal channel steel is vertically arranged, a circle is divided into several equal parts according to the equal volume, meanwhile, the control standard of 'double uniformity' is achieved in the construction process, and the compactness required by the design of the heat insulation bulk material and the uniform sedimentation of the tank body are achieved.
Example 7:
on the basis of embodiment 2, this embodiment provides a large-diameter high-temperature molten salt storage tank combined type basis, dysmorphism ring beam 2 is the notch cuttype, outer heat preservation 5 between dysmorphism ring beam 2 and the outer ring wall 8 is the ladder-shaped wide from top to bottom narrow. As shown in fig. 2 and 3.
In the aspect of heat preservation performance, the heat preservation layer with the wide upper part and the narrow lower part is filled by the special-shaped ring beam 2 and the outer ring wall 8, so that the loss of high heat flow density caused by the outward extension of the relative vertical wall of the bottom plate is effectively reduced.
Example 8:
on the basis of embodiment 2, the embodiment provides a large-diameter high-temperature molten salt storage tank composite foundation,
the conical top plate 1 is upwards sloped to the center of the storage tank 11 according to 1.5%, the thickness of the joint of the conical top plate 1 and the special-shaped ring beam 2 is R1/100, and R1 is the radius of the storage tank 11.
As shown in fig. 2, the variable stiffness roof is laid over the intermediate thermal insulation filler layer 3. As shown in figure 1, the slope is found from the slope rising line 10 of the conical surface to the center of the storage tank 11 according to the 1.5 percent of slope, so that the vertical deformation of the upper molten salt can be well adapted. The special-shaped ring beam 2 and the conical top plate 1 are in transition connection by adopting variable thickness and variable rigidity.
Example 9:
on the basis of embodiment 2, the embodiment provides a large-diameter high-temperature molten salt storage tank composite foundation,
the thickness of the conical top plate 1 is 100-150mm, the thickness of the middle heat insulation filling layer 3 is 1.5-2m, the thickness of the rigid bottom plate 6 is 400-800mm, and the thickness of the outer ring wall 8 is 500-600 mm.
As shown in fig. 2, t1 is the thickness of the conical top plate 1, t2 is the thickness of the middle heat-insulating filling layer 3, t3 is the thickness of the rigid bottom plate 6, and t0 is the thickness of the outer annular wall 8.
Example 10:
the embodiment provides a use method of a large-diameter high-temperature molten salt storage tank composite foundation, wherein the bottom of a storage tank 11 is tightly attached to a variable-rigidity top plate, the storage tank 11 is borne through the cooperation of the variable-rigidity top plate, an outer ring wall 8 and a rigid bottom plate 6, heat preservation is realized through a middle heat insulation filling layer 3, when the temperature of a thermocouple reaches 60% -70% of the concrete limit temperature of the rigid bottom plate 6, an alarm gives an alarm, a control cabinet starts a fan, and air is conveyed through a ventilation pipe 7 to take away heat.
The utility model discloses a combined type basis is applied to the Qinghai for the first time and merges 50MW photo-thermal power generation project (the first batch photo-thermal demonstration project of country), becomes rigidity roof, and middle insulating layer and rigid bottom plate 6 and rampart combined work break through the restriction on 11 types of foundations of conventional storage tank in coordination with the atress, have solved the basic difficult problem of a series of major diameter high temperature storage tank 11. The utility model discloses a mainly have heat-resisting concrete, ordinary concrete and thermal-insulated granule dispersoid on the basis material, the purchase and the construction of the project of being convenient for can shorten construction period simultaneously, satisfy green engineering, can realize that single major diameter storage tank 11 basis replaces multi-diameter storage tank 11, reach the purpose of optimizing the place and arranging and practicing thrift the land used. The utility model discloses a combined type keeps warm, thermal-insulated basis has certain economic nature and reliable practicality in the light and heat power station engineering field at home and abroad, has wide application prospect in new forms of energy heat-retaining and heat accumulation field.
It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.
Claims (8)
1. The utility model provides a major diameter high temperature fused salt storage tank combined type basis which characterized in that: the variable-rigidity steel-structure composite storage tank comprises a variable-rigidity top plate, a rigid bottom plate (6) and an outer ring wall (8), wherein the variable-rigidity top plate is connected with the upper portion of the outer ring wall (8), the rigid bottom plate (6) and the outer ring wall (8) are integrally poured, the variable-rigidity top plate is tightly attached to the bottom of the storage tank (11), an outer heat insulation layer (5) is arranged between the variable-rigidity top plate and the outer ring wall (8), a middle-interval heat filling layer (3) is arranged between the variable-rigidity top plate and the rigid bottom plate (6), and bin-divided steel beams (4) are arranged on the middle-interval heat filling layer (.
2. The large-diameter high-temperature molten salt storage tank composite foundation of claim 1, wherein: the variable-rigidity top plate comprises a special-shaped ring beam (2) and a conical top plate (1), the conical top plate (1) is a variable-thickness plate, the conical top plate (1) is fixedly arranged at the inner ring of the special-shaped ring beam (2), the special-shaped ring beam (2) is arranged below the wall of the storage tank (11), and the conical top plate (1) is tightly attached to the bottom plate of the storage tank (11).
3. The large-diameter high-temperature molten salt storage tank composite foundation of claim 1, wherein: the temperature measurement device is characterized in that a temperature measurement layer is arranged in the rigid bottom plate (6), a plurality of thermocouples are uniformly embedded in the temperature measurement layer, a plurality of ventilation pipes (7) are arranged below the temperature measurement layer, thermocouple electric signals are connected with a control cabinet, the control cabinet is electrically connected with a fan and an alarm, and one end of each ventilation pipe (7) is communicated with an air outlet of the fan.
4. The large-diameter high-temperature molten salt storage tank composite foundation of claim 1, wherein: the rigid bottom plate (6) is a reinforced concrete round bottom plate, and annular and radial reinforcing steel bars are arranged in the rigid bottom plate (6).
5. The large-diameter high-temperature molten salt storage tank composite foundation of claim 1, wherein: the bin steel beams (4) are vertically arranged into three layers, and each layer is arranged in a hexagon shape.
6. The large-diameter high-temperature molten salt storage tank composite foundation of claim 2, wherein: the special-shaped ring beam (2) is of a step shape, and the outer heat-insulating layer (5) between the special-shaped ring beam (2) and the outer ring wall (8) is of a step shape with a wide upper part and a narrow lower part.
7. The large-diameter high-temperature molten salt storage tank composite foundation of claim 2, wherein: the tapered roof (1) slopes upwards to the center of the storage tank (11) by 1.5%, the thickness of the joint of the tapered roof (1) and the special-shaped ring beam (2) is R1/100, and R1 is the radius of the storage tank (11).
8. The large-diameter high-temperature molten salt storage tank composite foundation of claim 2, wherein: the thickness of the conical top plate (1) is 100-150mm, the thickness of the middle heat insulation filling layer (3) is 1.5-2m, the thickness of the rigid bottom plate (6) is 400-800mm, and the thickness of the outer ring wall (8) is 500-600 mm.
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| CN111794264A (en) * | 2020-06-05 | 2020-10-20 | 中国电建集团西北勘测设计研究院有限公司 | Large-diameter high-temperature molten salt storage tank composite foundation and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111794264A (en) * | 2020-06-05 | 2020-10-20 | 中国电建集团西北勘测设计研究院有限公司 | Large-diameter high-temperature molten salt storage tank composite foundation and use method thereof |
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