A multi-functional giant frame industrial structure with inclined grids

Abstract

The present invention discloses a multi-functional giant frame industrial structure with diagonal grids, comprising: giant frame columns, diagonal grids, upper and lower truss beams, composite bottom plates, composite top plates and surface skins. The top of the structure supports a molten salt heat absorber, which is connected to the molten salt pipelines, cold molten salt tanks, hot molten salt tanks and steam generators inside the structure to jointly form a heat absorption system; the structure is provided with air inlet and outlet layers, which are connected to surface radiators inside the structure, external regenerative systems, circulating water pumps and other devices to jointly constitute a surface type indirect air cooling system. A multi-functional industrial structure solution is realized, which solves the problems of large power consumption of traditional direct cooling systems, large floor area, long construction period and high initial investment of indirect cooling systems. At the same time, the overall stiffness of the structure is large, the stability performance is good, and it is easy to meet the displacement limit of the structure caused by solar light concentration at the top of the tower. It can be widely applied to tower-type solar thermal power generation areas with different wind loads and seismic intensities.

Description

Technical Field

[0001] The invention belongs to the technical fields of civil engineering and energy and power engineering, and particularly relates to a multi-functional giant frame inclined grid industrial structure. Background Art

[0002] Tower-type solar thermal power generation uses a fixed mirror group to concentrate sunlight on a heat absorber fixed at the top of a tower, which is used to generate high temperature, heat a working medium to produce superheated steam or high-temperature gas, and drive a steam turbine generator set to generate electricity. Common tower-type solar thermal power generation areas include a steam turbine house area, a storage heat exchange and steam generator area, a cooling facility area, a water treatment and water supply facility area, a sewage and wastewater facility area, and a heat absorption tower, etc.

[0003] Existing cooling facilities mostly adopt air-cooling methods, including direct and indirect air-cooling systems. The direct air-cooling system adopts a mechanical ventilation method, which consumes a large amount of electricity by itself, about 5% of the electricity generated by solar thermal power. The large-diameter axial flow fans have high noise, and the system is greatly affected by ambient wind. The indirect air-cooling system is provided with an air-cooling tower, and the circulating water system is in a closed state, and the air-cooling power consumption rate is low. However, it has a large floor area and a large initial investment. The traditional air-cooling tower is built with concrete, has a long construction period, is difficult to construct as a whole, and will become solid waste after being scrapped, and has poor environmental protection performance.

[0004] The heat absorption tower is one of the important structures in the tower-type solar thermal power generation area. For a 150MW unit, the tower height exceeds 200m, and the load connected to the top of the tower exceeds 3000t of molten salt heat absorber. It should not only ensure the anti-wind and anti-seismic safety performance requirements of the structure, but also meet the displacement limit of the structure at the top of the tower for sunlight concentration at the top of the tower. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the invention is to provide a multi-functional giant frame inclined grid industrial structure. On the one hand, a giant frame skew grid structure is used to replace the traditional reinforced concrete structure air-cooling tower. On the other hand, it replaces the heat absorption tower supporting the molten salt heat absorber, realizing a structure scheme that combines the air-cooling tower and the heat absorption tower into one, and solving the problems of large power consumption of the traditional direct cooling system, large floor area of the indirect cooling system, and long construction period.

[0006] The present invention provides the following technical solution: a multi-functional giant frame diagonal grid industrial structure, including giant frame columns, diagonal grids, upper truss beams, lower truss beams, composite bottom plates, composite top plates and surface skins, with a molten salt heat absorber arranged at the top; the giant frame columns are arranged at the corners of the structure, the diagonal grids are formed by multiple through braces cross-connecting the giant frame columns at the corners, the lower truss beam is arranged at the top of the air outlet layer and supports the composite bottom plate, the upper truss beam is arranged at the top of the equipment layer, the upper truss beam and the four giant frame columns jointly support the composite top plate, the molten salt heat absorber is arranged at the top of the equipment layer and is fixedly connected to the composite top plate, and the surface skin is arranged within the outer surface range of the structure from above the air inlet layer to below the air outlet layer.

[0007] Preferably, there are four giant frame columns in total, which penetrate the entire structure, adopt a polygonal composite section, and the corner columns on each side are all hyperbolic; the middle diagonal grid is formed by the cross of concrete-filled steel tube braces, which are divided into multiple sections and penetrate and connect the giant frame columns on both sides, and are arranged from dense to sparse along the height, and a total of 4 sides are arranged within the entire structure.

[0008] Preferably, the angle between the concrete-filled steel tube brace and the vertical direction does not exceed 45°.

[0009] Preferably, both the upper truss beam and the lower truss beam are formed by the plane cross-connection of box-shaped steel members, and are connected by high-strength bolts. The upper truss beam and the lower truss beam are respectively connected to the four giant frame columns on the periphery, and the ends of the internal diagonal cross are connected to the giant frame columns.

[0010] Preferably, the composite bottom plate and the composite top plate adopt a composite section of profiled steel sheets and reinforced concrete slabs, and steel shear connectors are provided, and the profiled steel sheet materials all adopt weather-resistant structural steel.

[0011] Preferably, the surface skin adopts stainless steel sheets or aluminum alloy sheets supported by purlins.

[0012] Preferably, the molten salt pipelines, cold molten salt tanks, hot molten salt tanks and steam generators connected to the molten salt heat absorber are all arranged inside the giant frame diagonal grid structure.

[0013] Preferably, surface radiators of an air-cooling system are arranged inside the giant frame diagonal grid structure, and the surface radiators are connected to the external regenerative system and circulating water pump device to jointly form a surface-type indirect air-cooling system.

[0014] The giant frame diagonal grid industrial structure described in the present invention has the following beneficial effects:

[0015] (1) The giant-frame diagonal grid industrial structure of the present invention realizes a structure scheme that combines an air-cooling tower and a heat-absorbing tower into one, solves the problems of large floor area and high initial investment caused by the separate construction of traditional indirect cooling systems and heat-absorbing towers, greatly reduces the project cost, and has broad application prospects;

[0016] (2) The giant-frame diagonal grid industrial structure of the present invention uses an indirect air-cooling system instead of a mechanical ventilation air-cooling system, which greatly reduces the electricity consumed for cooling and does not cause noise pollution from mechanical ventilation, reducing the electricity consumption rate and operating cost of the plant area;

[0017] (3) The giant-frame diagonal grid industrial structure of the present invention uses a combined frame column of steel and concrete, and sets a diagonal grid between the columns. The amount of concrete used is small, and the construction is more convenient and the cycle is shorter than that of traditional reinforced concrete structures. The surface skin of the structure uses stainless steel plates or aluminum alloy plates, and the combined bottom plate and top plate use profiled weather-resistant structural steel. After the overall structure reaches the service life, these plates can still be reused, further improving the environmental protection performance and corrosion resistance of the project. At the same time, the environmental sensitivity of this structure is small, the project site selection is wider than that of traditional reinforced concrete structures, and the project applicability is strong;

[0018] (4) The giant-frame diagonal grid industrial structure of the present invention improves the lateral stiffness of the overall structure by setting a diagonal grid between the columns, and dissipates external energy through the diagonal grid under the action of wind load and seismic load. It has stronger energy dissipation ability than traditional reinforced concrete structures and excellent wind resistance and seismic safety performance, and can be applied to high-seismic-intensity areas with large wind loads;

[0019] (5) The giant-frame diagonal grid industrial structure of the present invention has a relatively large overall stiffness and good stability, can support a large-mass molten salt heat absorber at the top, and the lateral displacement at the top of the structure under the action of wind load and seismic load is smaller than that of traditional reinforced concrete structures, and it is easy to meet the displacement limit of the top of the tower for sunlight concentration at the top of the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a multi-functional giant-frame diagonal grid industrial structure of the present invention;

[0021] Figure 2 is Figure 1 the schematic diagram of the A-A cross-section in

[0022] Figure 3 is Figure 1 the schematic diagram of the B-B cross-section in

[0023] In the figure, the structure components of the structure: 1 - giant-frame column, 2 - diagonal grid, 3 - upper truss beam, 4 - lower truss beam, 5 - combined bottom plate, 6 - combined top plate;

[0024] Non-structural components: 7 - surface skin, 5 - molten salt heat absorber;

[0025] Special layers: 9 - air outlet layer, 10 - equipment layer, 11 - air inlet layer. Specific implementation manner

[0026] The present invention will be further described below through embodiments and drawings.

[0027] The present invention discloses a multi-functional giant frame inclined grid industrial structure, including: giant frame columns 1, inclined intersecting grids 2, upper truss beams 3, lower truss beams 4, composite bottom plates 5, composite top plates 6 and surface skins 7. The top of the structure supports a molten salt heat absorber, which is connected to the molten salt pipelines, cold molten salt tanks, hot molten salt tanks and steam generators inside the structure to jointly form a heat absorption system; the structure is provided with air inlet and outlet layers, which are connected to surface radiators inside the structure, external regenerative systems, circulating water pumps and other devices to jointly constitute a surface type indirect air cooling system. A structure scheme that combines an air cooling tower and a heat absorption tower is realized, solving problems such as large power consumption of traditional direct cooling systems, large floor area of indirect cooling systems, long construction periods and high initial investments. At the same time, the overall stiffness of the structure is large, the stability performance is good, and it is easy to meet the displacement limit of the structure caused by sunlight concentration at the top of the tower. It can be widely applied to tower-type solar thermal power generation areas with different wind loads and seismic intensities.

[0028] A multi-functional giant frame inclined grid industrial structure, including giant frame columns 1, inclined intersecting grids 2, upper truss beams 3, lower truss beams 4, composite bottom plates 5, composite top plates 6 and surface skins 7, with a molten salt heat absorber 8 provided at the top; the giant frame columns 1 are arranged at the corners of the structure, the inclined intersecting grids 2 are formed by multiple through diagonal braces cross-connecting the giant frame columns 1 at the corners, the lower truss beams 4 are arranged at the top of the air outlet layer 9 and support the composite bottom plates 5, the upper truss beams 3 are arranged at the top of the equipment layer 10, the upper truss beams 3 and the four giant frame columns 1 jointly support the composite top plates 6, the molten salt heat absorber 8 is arranged at the top of the equipment layer 10, the molten salt heat absorber 8 is fixedly connected to the composite top plates 6, and the surface skins 7 are arranged within the outer surface range of the structure from above the air inlet layer 11 to below the air outlet layer 9.

[0029] Preferably, there are a total of four giant frame columns 1, which penetrate the entire structure, adopt a polygonal composite section, and the corner columns on each side are all hyperbolic; the middle inclined intersecting grids 2 are formed by cross-connected concrete-filled steel tube diagonal braces, are divided into multiple sections and penetrate and connect the giant frame columns 1 on both sides, are arranged from dense to sparse along the height, and a total of 4 sides are provided within the entire structure range.

[0030] Preferably, the included angle between the concrete-filled steel tube diagonal brace and the vertical direction does not exceed 45°.

[0031] Preferably, both the upper truss beam 3 and the lower truss beam 4 are formed by the planar cross-connection of box-shaped steel members and are connected by high-strength bolts. Four mega-frame columns 1 are respectively connected to the periphery of the upper truss beam 3 and the lower truss beam 4, and the ends of the internal diagonal cross are connected to the mega-frame column 1.

[0032] Preferably, the composite bottom plate 5 and the composite top plate 6 adopt a composite section of profiled steel sheets and reinforced concrete slabs, and steel shear connectors are provided, and weathering structural steel is used for all profiled steel sheet materials.

[0033] Preferably, the surface skin 7 adopts stainless steel sheets or aluminum alloy sheets supported by purlins.

[0034] Preferably, the molten salt pipelines, cold molten salt tanks, hot molten salt tanks and steam generators connected to the molten salt receiver 8 are all arranged inside the mega-frame diagonal grid structure.

[0035] Preferably, surface radiators of the air-cooling system are arranged inside the mega-frame diagonal grid structure. The surface radiators are connected to the external regenerative system and the circulating water pump device to jointly form a surface-type indirect air-cooling system.

[0036] Embodiment 1:

[0037] See Figure 1 , Figure 2 and Figure 3 as an example only.

[0038] As Figures 1-3 shown, a multi-functional mega-frame diagonal grid industrial structure includes mega-frame columns 1, diagonal grids 2, upper truss beams 3, lower truss beams 4, composite bottom plates 5, composite top plates 6 and surface skins 7, and a molten salt receiver 8 is provided;

[0039] The mega-frame columns 1 are arranged at the corners of the structure, a total of four, penetrating the entire structure, adopting a composite section of concrete-filled steel tubes with multiple internal cavities, in a pentagonal shape, and the corner columns on each side are all in a hyperbolic shape, and the cross-section positions are presented in a retracted distribution;

[0040] The diagonal grid 2 is formed by the cross-connection of multiple through braces at the corners of the mega-frame columns 1, and is made of concrete-filled steel tubes or other composite material braces cross-connected, and is connected to the mega-frame columns 1 on both sides in multiple sections through, and is arranged from dense to sparse along the height. A total of 4 sides are arranged within the scope of the entire structure, jointly improving the lateral stiffness of the entire structure, and dissipating external energy through the deformation of the diagonal grid under wind load and seismic load;

[0041] The lower truss beam 4 is arranged at the top of the air outlet layer 9 and supports the composite floor slab 5. The upper truss beam 3 is arranged at the top of the equipment layer 10 and jointly supports the composite roof slab 6 with the four giant frame columns 1. Both the upper and lower truss beams are formed by the plane intersection of box-shaped steel members, connected by high-strength bolts, connected to the four giant frame columns 1 respectively on the periphery, and diagonally cross-connected to the giant frame columns 1 inside. The composite floor slab and roof slab adopt a composite section of profiled steel sheet and reinforced concrete slab, and steel shear connectors are set. Among them, the profiled steel sheet materials all adopt weather-resistant structural steel to improve the steam corrosion resistance at the top of the air outlet layer;

[0042] The surface skin 7 is arranged within the range of the outer surface of the structure from above the air inlet layer 11 to below the air outlet layer 9, and adopts stainless steel sheets or aluminum alloy sheets supported by purlins to improve the corrosion resistance of the inner and outer surfaces of the overall structure;

[0043] The molten salt heat absorber 8 is arranged at the top of the equipment layer 10, and the molten salt heat absorber 8 is fixedly connected to the composite roof slab 6. The molten salt heat absorber 8 is connected to the molten salt pipeline, cold molten salt tank, hot molten salt tank and steam generator inside the giant frame diagonal grid structure. The heliostat field reflects solar energy to the molten salt heat absorber 8 at the top. After the heat absorber absorbs heat, the temperature rises to 1000 degrees Fahrenheit. The cold molten salt is pumped from the cold molten salt tank to the molten salt heat absorber 8 by a cold salt pump, and is heated after absorbing energy. The heated molten salt flows into the hot molten salt tank and is stored. The hot molten salt in the hot molten salt tank is sent to the steam generator by a hot salt pump. The feed water is sent to the steam generator by a feed water pump. The molten salt and the feed water exchange heat fully in the steam generator to generate superheated steam, which is sent to the steam turbine to do work and generate electricity;

[0044] Surface radiators of the air-cooling system are arranged inside the giant frame diagonal grid structure. After the exhaust gas at the tail of the steam turbine enters the air inlet layer 12, it exchanges heat with circulating water, is boosted by a condensate pump to the regenerative system, and the exchanged circulating water returns to the surface radiator and exchanges heat with air, and then is boosted by a circulating water pump and sent back to the steam turbine house for recycling.

[0045] The above is a typical example of the present invention, and the implementation of the present invention is not limited thereto.

[0046] The above description is only a description of the preferred embodiments of the present invention, and is not any limitation on the scope of the present invention. Any change or modification made by any person skilled in the art according to the technical content disclosed above should be regarded as an equivalent effective embodiment, and all belong to the scope protected by the technical solution of the present invention.

Claims

1. A multi-functional giant frame inclined grid industrial structure, characterized in that, It includes mega-frame columns (1), diagonal grids (2), upper truss beams (3), lower truss beams (4), composite bottom plates (5), composite top plates (6) and surface skins (7), and a molten salt heat absorber (8) is arranged at the top; the mega-frame columns (1) are arranged at the corners of the structure, the diagonal grids (2) are formed by multiple through braces cross-connecting the mega-frame columns (1) at the corners, the lower truss beam (4) is arranged at the top of the air outlet layer (9) and supports the composite bottom plate (5), the upper truss beam (3) is arranged at the top of the equipment layer (10), the upper truss beam (3) and four mega-frame columns (1) jointly support the composite top plate (6), the molten salt heat absorber (8) is arranged at the top of the equipment layer (10), and the molten salt heat absorber (8) is fixedly connected to the composite top plate (6), the surface skin (7) is arranged within the outer surface range of the structure from above the air inlet layer (11) to below the air outlet layer (9); there are a total of four mega-frame columns (1), which penetrate the entire structure and adopt a polygonal composite section, and the corner columns on each side are all hyperbolic; the diagonal grids (2) are formed by the cross of concrete-filled steel tube braces, are divided into multiple segments and penetrate and connect the two-sided mega-frame columns (1), and are arranged from dense to sparse along the height, and a total of 4 sides are arranged within the entire structure range; the composite bottom plate (5) and the composite top plate (6) adopt a composite section of profiled steel sheet and reinforced concrete slab, and steel profile shear connectors are arranged.

2. The multi-functional giant frame diagonal grid industrial structure according to claim 1, characterized in that The angle between the concrete-filled steel tube brace and the vertical direction does not exceed 45°.

3. The multi-functional giant frame diagonal grid industrial structure according to claim 1, characterized in that Both the upper truss beam (3) and the lower truss beam (4) are formed by the plane cross-connection of box-shaped steel members, and are connected by high-strength bolts. The upper truss beam (3) and the lower truss beam (4) are respectively connected to four mega-frame columns (1) on the outside, and the ends of the internal diagonal cross are connected to the mega-frame columns (1).

4. The multi-functional giant frame diagonal grid industrial structure according to claim 1, characterized in that, Among them, the profiled steel sheet materials all adopt weather-resistant structural steel.

5. The multi-functional giant frame diagonal grid industrial structure according to claim 1, characterized in that The surface skin (7) adopts stainless steel sheets or aluminum alloy sheets supported by purlins.

6. The multi-functional giant frame diagonal grid industrial structure according to claim 1, characterized in that, The molten salt pipelines, cold molten salt tanks, hot molten salt tanks and steam generators connected to the molten salt heat absorber (8) are all arranged inside the multi-functional mega-frame diagonal grid industrial structure.

7. The multi-functional giant frame diagonal grid industrial structure according to claim 1, characterized in that, Surface radiators of the air-cooling system are arranged inside the multi-functional mega-frame diagonal grid industrial structure. The surface radiators are connected to the external regenerative system and circulating water pump device to jointly form a surface-type indirect air-cooling system.

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