Novel fused salt storage tank foundation structure of solar thermal power station

Abstract

The utility model discloses a novel fused salt storage tank foundation structure of a solar thermal power station, which comprises a foundation cushion layer which is of a plain concrete structure and presents a drainage slope with a high center and a low circumference; the annular retaining wall is vertically arranged on the outer edge of the foundation bed; the rigid concrete bottom plate is arranged at the top end of the foundation cushion layer, a deformation joint is arranged between the rigid concrete bottom plate and the annular retaining wall, and a ventilation pipeline is pre-buried in the rigid concrete bottom plate; the heat insulation bearing layer is laid at the top end of the rigid concrete bottom plate; the graded broken stone layer is arranged at the top end of the heat insulation bearing layer; the heat preservation layer is arranged on the outer side of the annular retaining wall; and the gap between the storage tank and the annular retaining wall is filled with the deformation cushion block. The heat insulation bearing structure adopted by the utility model is a calcium silicate finished product plate instead of traditional granular mixtures such as ceramsite, so that the grinding process of the granular mixtures is reduced, the construction process is simplified, and the construction period is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar thermal power generation engineering molten salt storage tank foundation technical field especially relates to a novel solar thermal power station molten salt storage tank foundation structure. BACKGROUND

[0002] The cold and hot molten salt tank in the photo-thermal power station is the core heat storage equipment in the photo-thermal power generation process, and the molten salt stored has high-temperature characteristics, the temperature of the cold salt tank can reach 400 DEG C, and the temperature of the hot salt tank can reach 600 DEG C. The molten salt storage tank foundation needs to have good heat preservation performance to reduce heat loss, can withstand a temperature of up to 600 DEG C and a load of ten thousand tons, and also needs to have the ability to withstand the mutual influence of the thermal expansion of the heat storage tank under high temperature and the thermal deformation of the heat storage tank foundation itself, and withstand the reciprocating action caused by the loading and unloading of molten salt. These characteristics determine that the design of the heat storage tank foundation is very different from the conventional oil tank foundation.

[0003] However, the outer side of the solar thermal cold and hot storage tank foundation currently adopts two ring walls, the inside of the foundation is filled with ceramic soil and other granular materials, and the bottom ventilation pipeline adopts straight-line arrangement, so there are quality and safety risks such as complex foundation structure construction procedure, uneven stress, high cost and inverted tank. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a novel solar thermal power station molten salt storage tank foundation structure, thereby solving the foregoing problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A novel solar thermal power station molten salt storage tank foundation structure, comprising:

[0007] The foundation cushion layer is a plain concrete structure and has a drainage slope with a central high and a peripheral low;

[0008] The ring-shaped retaining wall is vertically arranged at the outer edge of the foundation cushion layer;

[0009] The rigid concrete bottom plate is arranged at the top end of the foundation cushion layer, a deformation joint is arranged between the rigid concrete bottom plate and the ring-shaped retaining wall, and a ventilation pipeline is pre-buried in the rigid concrete bottom plate;

[0010] The heat-insulating load-bearing layer is arranged at the top end of the rigid concrete bottom plate;

[0011] The graded gravel layer is arranged at the top end of the heat-insulating load-bearing layer;

[0012] The heat preservation layer is arranged at the outer side of the ring-shaped retaining wall;

[0013] The deformation cushion block is filled in the gap between the heat storage tank and the ring-shaped retaining wall.

[0014] In some embodiments, the base cushion layer has a thickness of 0.2m-1.0m and a diameter of 10m-50m.

[0015] In some embodiments, the rigid concrete bottom plate is a heat-resistant reinforced concrete structure.

[0016] The thickness is 0.4m-3.0m, and the diameter is 10m-50m.

[0017] In some embodiments, the ventilation pipe is a heat-resistant high-strength metal pipe with a diameter of 100mm-400mm and a wall thickness of 2mm-6mm, arranged along a quarter of the inner curve, a straight line and a circular center.

[0018] In some embodiments, the heat-insulating load-bearing layer is made of calcium silicate board with a thickness of 5cm-100cm, a length and a width of 1m-5m, and a total thickness of 1m-5.0m and a diameter of 10m-50m.

[0019] In some embodiments, the heat-insulating layer is made of rock wool, glass wool, polystyrene or polyurethane heat-insulating layer material with a thickness of 100mm-200mm.

[0020] In some embodiments, the deformation cushion is made of foam board or softwood elastic material with a thickness of 30mm-50mm.

[0021] In some embodiments, the structure further comprises an isolation agent coated on the outer side of the ventilation pipe.

[0022] The isolation agent is a butter or asphalt smooth material.

[0023] The beneficial effects of the utility model are: the utility model discloses a novel solar thermal power station molten salt storage tank foundation structure, including base cushion layer, is the plain concrete structure, and presents the central high, and the circumference is low drainage slope;Annular retaining wall is vertically arranged at the outer edge of base cushion layer;Rigid concrete bottom plate is set up at the top of base cushion layer, and the annular retaining wall is provided with deformation joint between, and the inside is embedded with ventilation pipe;Heat-insulating load-bearing layer is laid in the top of rigid concrete bottom plate;Graded gravel layer is set up at the top of heat-insulating load-bearing layer;Heat-insulating layer is set up at the outside of annular retaining wall;Deformation cushion is filled in the gap between storage tank and annular retaining wall.

[0024] (1) the utility model adopts single annular retaining wall, and compared with the traditional double annular retaining wall structure, can effectively reduce the direct investment of project, saves the construction period.

[0025] (2) The heat insulation load bearing structure is a calcium silicate finished plate, which replaces traditional ceramic particles and reduces the rolling process of the particles, simplifies the construction process and saves the construction period.

[0026] (3) The ventilation pipeline adopts a quarter circle inner curve and a straight line, and a circular arrangement at the center, so that the ventilation pipeline is more uniform, has less influence on the foundation structure and has better heat dissipation effect.

[0027] (4) The utility model discloses a ventilation pipeline outside surface is brushed with the isolating agent, can effectively isolate the bonding of metal pipeline and rigid concrete, avoids the deformation coordination of concrete and metal structure not being consistent, and breaks or extrusion damage is pulled to the ventilation pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the vertical section view of the heat storage tank foundation of the utility model;

[0029] Figure 2 It is the plan view of the heat storage tank foundation of the utility model;

[0030] Figure 3 It is the horizontal section view of the ventilation pipeline layer of the heat storage tank foundation of the utility model;

[0031] Figure 4 It is the horizontal section view of the heat insulation load bearing layer of the heat storage tank foundation of the utility model.

[0032] In the drawings, 1, heat storage tank;2, deformation pad;3, annular retaining wall;4, heat preservation layer;5, foundation cushion layer;6, graded gravel layer;7, heat insulation load bearing layer;8, ventilation pipeline;9, isolating agent;10, rigid concrete bottom plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0034] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 A novel molten salt storage tank foundation structure of a solar thermal power station is shown, which comprises a foundation cushion layer 5, which is a plain concrete structure and presents a drainage slope with a high center and a low periphery;

[0035] Annular retaining wall 3 is vertically arranged at the outer edge of foundation cushion layer 5.

[0036] Rigid concrete bottom plate 10, set on the top of the foundation cushion 5, with a deformation joint between the ring retaining wall 3, and internally embedded with ventilation duct 8;

[0037] Thermal insulation load-bearing layer 7, laid on the top of the rigid concrete bottom plate 10;

[0038] Graded gravel layer 6, set on the top of the thermal insulation load-bearing layer 7;

[0039] Insulation layer 4, set on the outside of the ring retaining wall 3;

[0040] Deformation cushion 2, filled in the gap between the heat storage tank 1 and the ring retaining wall 3. In this embodiment, each structure is fixedly connected together. The rigid concrete bottom plate 10 and the ring retaining wall 3 are both made of high-temperature-resistant reinforced concrete structure.

[0041] In some embodiments, the thickness of the foundation cushion 5 is 0.2m-1.0m, and the diameter is 10m-50m.

[0042] In some embodiments, the rigid concrete bottom plate 10 is a heat-resistant reinforced concrete structure; the heat-resistant temperature is not less than 800℃,

[0043] The thickness is 0.4m-3.0m; the diameter is 10m-50m;

[0044] In some embodiments, the ventilation duct 8 is a heat-resistant high-strength metal duct, the duct diameter is 100mm-400mm, the wall thickness is 2mm-6mm, and the duct is arranged along the quarter circle inner curve, straight line, and circle center.

[0045] It should be noted that the rigid bottom plate 10 internally embeds a plurality of single ventilation ducts 8 along the quarter circle.

[0046] In some embodiments, the thermal insulation load-bearing layer 7 is made of calcium silicate board, the board thickness is 5cm-100cm, the length and width are 1m-5m, the layering and blocking are laid, the total thickness is 1m-5.0m, and the diameter is 10m-50m. The thermal insulation load-bearing layer 7 adopts a finished calcium silicate board with high-temperature resistance and high strength.

[0047] In some embodiments, the insulation layer 4 adopts rock wool, glass wool, polystyrene or polyurethane insulation layer material, and the thickness is 100mm-200mm. The insulation layer 4 is located outside the ring retaining wall 3 to avoid heat loss.

[0048] In some embodiments, the deformation cushion 2 adopts a foam board or a cork elastic material, and the thickness is 30mm-50mm.

[0049] In some embodiments, it further includes: a separation agent 9 coated on the outside of the ventilation duct.

[0050] In the embodiment, the ventilation duct 8 is a metal duct or other duct, the outer surface of which is coated with an isolation layer 9 and arranged in a ring shape.

[0051] The isolation agent is butter or asphalt smooth material, which can effectively prevent the ventilation duct 8 from adhering to the rigid floor 7.

[0052] The setting steps of the utility model are as follows:

[0053] Step one: pouring a plain concrete cushion layer at the bottom of the heat storage tank;

[0054] Step two: pouring a reinforced concrete rigid floor on the upper part of the concrete cushion layer, and pre-burying a ventilation duct inside;

[0055] Step three: pouring a ring-shaped concrete retaining wall on the outer side of the rigid floor, and setting a thermal insulation layer on the outer side of the retaining wall;

[0056] Step four: laying a heat-insulating load-bearing calcium silicate plate on the upper part of the rigid floor in block partition, and ensuring that the horizontal and vertical joints of the plate are uniform and dense;

[0057] Step five: filling a graded gravel layer on the upper part of the heat-insulating load-bearing layer, and performing layered construction to ensure that the porosity meets the requirements.

[0058] Step six: installing a deformation cushion block on the inner side of the upper part of the ring-shaped retaining wall, and then installing a heat storage tank body on the upper part of the gravel layer.

[0059] By adopting the above technical scheme of the utility model, the following beneficial effects are obtained:

[0060] (1) The utility model adopts a single ring-shaped retaining wall, which can effectively reduce the direct investment of the project and save the construction period compared with the traditional double ring-shaped retaining wall structure.

[0061] (2) The heat-insulating load-bearing structure adopted by the utility model is a calcium silicate finished plate, which replaces the traditional ceramic particles and other granular bodies, reduces the rolling process of the granular bodies, simplifies the construction process, and saves the construction period.

[0062] (3) The ventilation duct of the utility model adopts a quarter circle inner curve and a straight line, and is arranged in a circular shape at the center, so that the ventilation duct is arranged more uniformly, has a small influence on the foundation structure, and has a better heat dissipation effect.

[0063] (4) The utility model coats an isolation agent on the outer surface of the ventilation duct, which can effectively isolate the adhesion between the metal duct and the rigid concrete, avoid the inconsistent deformation coordination between the concrete and the metal structure, and prevent the ventilation duct from being cracked or damaged by extrusion.

[0064] The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application.

Claims

1. A novel molten salt storage tank foundation structure for a solar thermal power plant, characterized in that, It comprises: a base cushion layer (5) of plain concrete structure, with a central high and circumferential low drainage slope; a circumferential retaining wall (3) vertically arranged at the outer edge of the base cushion layer (5); a rigid concrete bottom plate (10) arranged at the top end of the base cushion layer (5), with a deformation joint between the circumferential retaining wall (3), and with a ventilation pipe (8) pre-buried inside; a heat-insulating load-bearing layer (7) laid on the top end of the rigid concrete bottom plate (10); a graded gravel layer (6) arranged on the top end of the heat-insulating load-bearing layer (7); a heat-insulating layer (4) arranged outside the circumferential retaining wall (3); a deformation cushion block (2) filled in the gap between the heat storage tank (1) and the circumferential retaining wall (3).

2. The new molten salt storage tank foundation structure of a solar thermal power station according to claim 1, wherein the thickness of the base cushion layer (5) is 0.2m-1.0m, and the diameter is 10m-50m.

3. The new molten salt storage tank foundation structure of a solar thermal power station according to claim 1, wherein the rigid concrete bottom plate (10) is a heat-resistant reinforced concrete structure, with a thickness of 0.4m-3.0m and a diameter of 10m-50m.

4. The new molten salt storage tank foundation structure of a solar thermal power station according to claim 1, wherein the ventilation pipe (8) is a heat-resistant high-strength metal pipe, with a diameter of 100mm-400mm and a wall thickness of 2mm-6mm, arranged along the quarter-circle inner curve, straight line and circular center.

5. The new molten salt storage tank foundation structure of a solar thermal power station according to claim 1, wherein the heat-insulating load-bearing layer (7) is made of calcium silicate board, with a thickness of 5cm-100cm, a length and width of 1m-5m, and a total thickness of 1m-5.0m and a diameter of 10m-50m.

6. The new molten salt storage tank foundation structure of a solar thermal power station according to claim 1, wherein the heat-insulating layer (4) is made of rock wool, glass wool, polystyrene or polyurethane heat-insulating layer material, with a thickness of 100mm-200mm.

7. The new molten salt storage tank foundation structure of a solar thermal power station according to claim 1, wherein the deformation cushion block (2) is made of foam board or cork elastic material, with a thickness of 30mm-50mm.

8. The new molten salt storage tank foundation structure of a solar thermal power station according to claim 1, further comprising a separating agent (9) coated on the outside of the ventilation pipe. The separating agent is butter or asphalt smooth material. ​ ​ ​ ​ ​ ​ ​ ​

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