A high temperature insulation protection structure for a tower type solar thermal power station absorber

Abstract

The present invention relates to the technical field of molten salt tower solar thermal power stations, and discloses a high-temperature heat insulation protection structure for a tower solar thermal power station absorber, comprising a connecting frame and a heat-resistant heat insulation layer, a heat-insulating layer, a waterproof layer and a protective layer which are sequentially arranged on the connecting frame in a bonded manner. The present invention has the technical effects of protecting the overflow protection area and reducing heat waste.

Description

Technical Field

[0001] The present invention relates to the technical field of molten salt tower type solar thermal power plants, and in particular to a high temperature heat insulation protection structure for a heat absorber of a tower type solar thermal power plant. Background Art

[0002] The molten salt tower solar thermal power station, located in the Photovoltaic Industrial Park of Dunhuang City, Gansu Province, was independently designed, invested and built by Chinese enterprises. It was connected to the grid and generated electricity at the end of December 2018. It is one of the first batch of national solar thermal power demonstration power stations and also the world's tallest molten salt tower solar thermal power station with the largest concentrating area.

[0003] The "Super Mirror Power Station" - the 100MW molten salt tower solar thermal power station in Dunhuang, Gansu Province, achieved full load power generation, and the 24-hour continuous power generation exceeded 1.8 million kWh under summer conditions. This marks that my country has become one of the few countries in the world that has mastered the complete set of core technologies for large-scale molten salt tower solar thermal power stations. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber, so as to achieve the technical effect of protecting the overflow protection area and reducing heat waste.

[0005] To achieve the above-mentioned purpose, the present invention provides a high-temperature thermal insulation protection structure for a tower-type solar thermal power station absorber, comprising a connecting frame and a heat-resistant insulation layer, a thermal insulation layer, a waterproof layer and a protective layer which are sequentially arranged on the connecting frame in a bonded manner.

[0006] Furthermore, the heat-resistant insulation layer includes aerogel felt.

[0007] Furthermore, the thermal insulation layer is an inorganic fiberboard, and the thermal insulation layer comprises the following components by weight:

[0008] Al 2 O 3 40-50 parts SiO 2 50-55 servings.

[0009] Furthermore, the waterproof layer is made of stainless steel.

[0010] Furthermore, the protective layer is an inorganic fiberboard, and the protective layer comprises the following components by weight:

[0011] Al 2 O 3 30-45 parts SiO 2 45-60 servings;

[0012] ZrO 2 5-15 servings.

[0013] Furthermore, a waterproof coating layer is provided on the outer side of the protective layer.

[0014] Furthermore, the lengths and widths of the heat-resistant insulation layer, the thermal insulation layer, the waterproof layer and the protective layer are equal, and the lengths and widths of the heat-resistant insulation layer, the thermal insulation layer and the waterproof layer are flush, and the waterproof layer and the protective layer are staggered.

[0015] Furthermore, a number of connecting holes are opened through the heat-resistant insulation layer, the thermal insulation layer, the waterproof layer and the protective layer, each of the connecting holes is provided with a connecting tube, a connecting frame is provided in the connecting tube, both ends of the connecting frame are located on the outside of the connecting tube, one end of the connecting frame is bent and provided with a consolidation portion, and the other end is provided with a limiting mechanism for limiting the protective layer.

[0016] Furthermore, the limiting mechanism includes a limiting plate and a limiting nut, the limiting plate is sleeved on the connecting frame, the limiting nut is threadedly connected to the connecting frame, and two sides of the limiting plate are respectively attached to the protective layer and the limiting nut.

[0017] Furthermore, four connecting frames are provided, and the connecting line of the ends of the four connecting frames is a square;

[0018] A limiting groove coaxial with the connecting frame is provided on the outer wall of the connecting frame;

[0019] The limiting mechanism comprises:

[0020] A first limiting body and a second limiting body which are U-shaped and facing each other, wherein the first limiting body and the second limiting body are both vertical;

[0021] An L-shaped first limiting buckle is disposed on the outer sides of both ends of the first limiting body, a U-shaped first opening is formed between the first limiting buckle and the end of the first limiting body, an inner wall of the first opening and both sides of the first limiting body and the first limiting buckle are all fitted to an inner wall of the limiting groove, a first extending portion is horizontally disposed in the middle of the first limiting body, and a first limiting semi-cylinder and a positioning column are sequentially disposed on one end of the first extending portion close to the second limiting body;

[0022] An L-shaped second limiting buckle is arranged on the outer side of both ends of the second limiting body, a U-shaped second opening is formed between the second limiting buckle and the end of the second limiting body, an inner wall of the second opening and both sides of the second limiting buckle and the second limiting body are all fitted to the inner wall of the limiting groove, a second extending portion is horizontally arranged at the middle part of the second limiting body, a second limiting semi-cylinder is arranged at one end of the second extending portion close to the first limiting body, the outer side of the free end of the second limiting semi-cylinder is rounded or chamfered, and the first limiting semi-cylinder and the second limiting semi-cylinder form a cylindrical shape coaxial with the positioning column and having the same diameter;

[0023] A positioning cylinder, one end of which is threadably matched with the positioning column, and the inner wall of the other end of which is in contact with the outer walls of the first limiting semi-cylinder and the second limiting semi-cylinder;

[0024] A first dovetail groove in a dovetail shape is vertically penetrated through the first extension portion, and a second dovetail groove in a dovetail shape is vertically penetrated through the second extension portion, wherein the first dovetail groove is communicated with the second dovetail groove;

[0025] An auxiliary member, wherein the auxiliary member vertically penetrates the first dovetail groove and the second dovetail groove, and the outer wall of the auxiliary member is fitted to the inner wall of the first dovetail groove and the second dovetail groove, an L-shaped anti-rotation member is arranged on the top of the auxiliary member, an anti-rotation hole is opened on the top of the positioning cylinder, one end of the anti-rotation member is connected to the auxiliary member, and the other end is interference fit to the inner wall of the anti-rotation hole;

[0026] The first limiting body, the second limiting body, the first limiting buckle, the second limiting buckle, the first extending portion and the second extending portion are all attached to the outer side of the protective layer.

[0027] The beneficial effects of the high-temperature insulation protection structure for the tower-type solar thermal power station absorber provided by the present invention are: first, the tower-type solar thermal power station absorber includes a heat absorber (black) for absorbing heat and a light overflow protection zone (white) located above and below the heat absorber, and during use, the protection structure of the present application is used on the inner side of the heat absorber to reduce heat loss, thereby increasing or ensuring the temperature of the molten salt and increasing power generation; secondly, the protection structure of the present application is also used on the outer side of the light overflow protection zone to block light and cool the structures and objects inside the light overflow protection zone, thereby extending the service life of the power station's heat absorption tower.

[0028] In actual use, the connecting frame is fixedly welded to the steel structure of the heat absorber and the overflow protection area; secondly, the structure of the present application is a protection unit. In actual use, it is necessary to combine and use multiple protection units according to the size and shape of the heat absorber and the overflow protection area, so that the entire heat absorber can be kept warm inside, and the entire overflow protection area can be protected at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an embodiment of a high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber provided by the present invention;

[0030] Figure 2 It is a cross-sectional view of an embodiment of a high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber provided by the present invention;

[0031] Figure 3 yes Figure 2 A magnified view of part A;

[0032] Figure 4 It is a schematic diagram of an embodiment of a high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber provided by the present invention when it is assembled for use;

[0033] Figure 5 yes Figure 4 A magnified view of part B;

[0034] Figure 6 It is a structural schematic diagram of a high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber provided by the present invention;

[0035] Figure 7 yes Figure 6 Enlarged view of part C;

[0036] Figure 8 yes Figure 7 A magnified view of part D in the middle;

[0037] Fig. 9 yes Figure 7 Enlarged view of part E in the middle;

[0038] Fig.10 It is a schematic diagram of an embodiment of a limiting mechanism in Embodiment 2 of a high-temperature heat insulation protection structure for a heat absorber of a tower-type solar thermal power station provided by the present invention;

[0039] Fig.11 yes Fig.10 Enlarged view of part F;

[0040] Fig.12It is a cross-sectional view of an embodiment of a limiting mechanism 1 in Embodiment 2 of a high-temperature heat insulation protection structure for a heat absorber of a tower-type solar thermal power station provided by the present invention;

[0041] Fig.13 yes Fig.12 Enlarged view of section G;

[0042] Fig.14 It is an exploded view of an embodiment of a limiting mechanism 1 in Embodiment 2 of a high-temperature heat insulation protection structure for a heat absorber of a tower-type solar thermal power station provided by the present invention;

[0043] Fig.15 yes Fig.14 Magnified view of section H.

[0044] Numbers in the figure: 1. connecting frame; 2. heat-resistant insulation layer; 3. thermal insulation layer; 4. waterproof layer; 5. protective layer; 6. connecting hole; 7. connecting tube; 8. consolidation part; 9. limiting plate; 10. limiting nut; 11. limiting groove; 12. first limiting body; 13. second limiting body; 14. first limiting buckle; 15. first opening; 16. first extension part; 17. first limiting semi-cylinder; 18. positioning column; 19. second limiting buckle; 20. second opening; 21. second extension part; 22. second limiting semi-cylinder; 23. positioning tube; 24. first dovetail groove; 25. second dovetail groove; 26. auxiliary part; 27. anti-rotation part; 28. anti-rotation hole. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiment of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention.

[0046] like Figures 1 to 5 As shown,

[0047] A high-temperature heat-insulating protection structure for a tower-type solar thermal power station absorber comprises a connecting frame 1 and a heat-resistant heat-insulating layer 2, a thermal insulation layer 3, a waterproof layer 4 and a protective layer 5 which are sequentially arranged on the connecting frame 1 in a close-fitting manner.

[0048] The heat-resistant insulation layer 2 includes aerogel felt.

[0049] The thermal insulation layer 3 is an inorganic fiberboard, and the thermal insulation layer 3 includes the following components by weight:

[0050] 45 parts Al 2 O 3 、52 parts SiO 2 The thermal insulation layer 3 is made by a dry process.

[0051] The waterproof layer 4 is made of stainless steel, wherein the thickness of the waterproof layer 4 is relatively thin (only shown in the figure, not representing the actual structure), which is about millimeter level; this ensures that it has a certain waterproof effect while also having a lighter weight, making the use effect better.

[0052] The protective layer 5 is an inorganic fiberboard, and the protective layer 5 comprises the following components by weight:

[0053] 40 parts Al 2 O 3 、50 parts SiO 2 、10 parts ZrO 2 The protective layer 5 can be made by either a wet method or a dry method, but in the present application, the wet method is preferred, which can make the protective layer 5 have better strength and thus better withstand the environment in which it is used.

[0054] A waterproof coating layer is disposed on the outer side of the protective layer 5 .

[0055] The length and width (preferably a square cross-section) of the heat-resistant insulation layer 2, the thermal insulation layer 3, the waterproof layer 4 and the protective layer 5 are equal, and the length and width of the heat-resistant insulation layer 2, the thermal insulation layer 3 and the waterproof layer 4 are flush, and the waterproof layer 4 and the protective layer 5 are staggered.

[0056] A plurality of connection holes 6 are provided through the heat-resistant insulation layer 2, the thermal insulation layer 3, the waterproof layer 4 and the protective layer 5, each of the connection holes 6 is provided with a connection tube 7, a connection frame 1 is provided in the connection tube 7, both ends of the connection frame 1 are located on the outside of the connection tube 7, one end of the connection frame 1 is bent to provide a consolidation portion 8, and the other end is provided with a limiting mechanism for limiting the protective layer 5.

[0057] The limiting mechanism includes a limiting plate 9 and a limiting nut 10. The limiting plate 9 is sleeved on the connecting frame 1. The limiting nut 10 is threadedly connected to the connecting frame. Both sides of the limiting plate 9 are respectively attached to the protective layer 5 and the limiting nut 10.

[0058] First, the tower-type solar thermal power station absorber includes a heat absorber (black) for absorbing heat and a light overflow protection zone (white) located above and below the heat absorber. During use, the protective structure of the present application is used on the inner side of the heat absorber to reduce heat loss, thereby increasing or ensuring the temperature of the molten salt and increasing power generation; secondly, the protective structure of the present application is also used on the outer side of the light overflow protection zone to block light and cool down the structures and objects inside the light overflow protection zone, thereby extending the service life of the power station's heat absorption tower.

[0059] In actual use, the connecting frame 1 (preferably four in each unit) is fixedly welded to the steel structure of the heat absorber and the overflow protection area; secondly, the structure of the present application is a protection unit. In actual use, it is necessary to combine and use multiple protection units according to the size and shape of the heat absorber and the overflow protection area, so that the entire interior of the heat absorber can be insulated and the entire outside of the overflow protection area can be protected.

[0060] Moreover, the heat-resistant insulation layer 2 comprises aerogel felt, which has low thermal conductivity, tensile and compressive strength, and certain flexibility. Therefore, setting it as the innermost layer can better fit the required place. At the same time, it can not only fit the required covering place, but its low thermal conductivity can also play a good role in heat insulation, so that the heat of the heat absorber can be normally retained and the loss can be reduced. At the same time, the protection effect on the overflow protection area is also better.

[0061] Among them, although the aerogel felt has good thermal insulation effect, its cost is relatively high, but the cost of the thermal insulation layer 3 of the inorganic fiberboard is relatively low; in actual use, when the thinner heat-resistant insulation layer 2 and the thicker thermal insulation layer 3 are used in combination, the thermal insulation effect can be guaranteed to a large extent, while also reducing the cost of use. The waterproof layer 4 is made of stainless steel; although the power station is built in the desert, it will also experience rain in actual use, and at this time the waterproof layer 4 can better prevent water from entering the interior. At the same time, the protective layer 5 is also made of inorganic refractory fiberboard, and it is in a dislocated state. Therefore, in actual use, the protective structure in the middle can overlap with the four surrounding protective structures, thereby making the overall structure more intimate, that is, reducing the through gap between the protective structure units and the units, and reducing the heat loss of the absorber and the excessive temperature rise of the overflow protection area to a greater extent.

[0062] At the same time, a hard waterproof coating layer is applied on the outside of the protective layer 5, which firstly can play a waterproof role and effect; secondly, the waterproof coating layer and the protective layer 5 can make the outermost side of the protective structure have sufficient strength, which can better resist the wind and sand in the desert environment, the temperature difference between day and night, etc., and ensure the service life of the protective structure. In addition, since the heat-resistant insulation layer 2, the thermal insulation layer 3, the waterproof layer 4 and the protective layer 5 are all light in weight, they can be easily installed and used, and at the same time, the service life of the power station is guaranteed, and the requirements of safety and lightness are met.

[0063] When installing the protective structure, first weld the consolidation part 8 to the steel structure of the heat absorber or the spill protection area at the required position, and four consolidation parts 8 and four connecting frames 1 are a group; because the consolidation part 8 increases the total connection area between the connecting frame 1 and the heat absorber or the spill protection area, the connection stability and service life of the connecting frame 1 are improved.

[0064] After the connection of the connecting frame 1 is completed, the connecting holes 6 of the heat-resistant insulation layer 2, the thermal insulation layer 3, the waterproof layer 4 and the protective layer 5 are aligned, or the four structures have been fixed and connected in advance; then the connecting hole 6 is sleeved on the connecting frame 1; then the limit plate 9 is sleeved on the connecting frame 1, and the limit nut 10 is threadedly connected to complete the connection of the entire structure.

[0065] Example 2

[0066] The difference from the first embodiment is that, Figures 6 to 15 As shown, four connecting frames 1 are provided, and the connecting line of the ends of the four connecting frames 1 is a square;

[0067] The outer wall of the connecting frame 1 is provided with a limiting groove 11 coaxial with the connecting frame 1;

[0068] The limiting mechanism comprises:

[0069] A first limiting body 12 and a second limiting body 13 that are U-shaped and facing each other, wherein the first limiting body 12 and the second limiting body 13 are both vertical;

[0070] An L-shaped first limiting buckle 14 is disposed on the outer sides of both ends of the first limiting body 12, and a U-shaped first opening 15 is formed between the first limiting buckle 14 and the end of the first limiting body 12, and the inner wall of the first opening 15 and both sides of the first limiting body 12 and the first limiting buckle 14 are all attached to the inner wall of the limiting groove 11, and a first extending portion 16 is horizontally disposed in the middle of the first limiting body 12, and a first limiting semi-cylinder 17 and a positioning column 18 are sequentially disposed on one end of the first extending portion 16 close to the second limiting body 13;

[0071] An L-shaped second limiting buckle 19 is provided on the outer sides of both ends of the second limiting body 13, and a U-shaped second opening 20 is formed between the second limiting buckle 19 and the end of the second limiting body 13, and the inner wall of the second opening 20 and the two sides of the second limiting buckle 19 and the second limiting body 13 are all fitted to the inner wall of the limiting groove 11, and a second extending portion 21 is horizontally provided in the middle of the second limiting body 13, and a second limiting semi-cylinder 22 is provided at one end of the second extending portion 21 close to the first limiting body 12, and the outer side of the free end of the second limiting semi-cylinder 22 is rounded or chamfered, and the first limiting semi-cylinder 17 and the second limiting semi-cylinder 22 form a cylindrical shape that is coaxial with the positioning column 18 and has the same diameter;

[0072] A positioning cylinder 23, one end of which is threadedly engaged with the positioning column 18, and the inner wall of the other end is in contact with the outer wall of the first limiting semi-cylinder 17 and the second limiting semi-cylinder 22;

[0073] A first dovetail groove 24 with a dovetail shape is vertically penetrated through the first extension portion 16, and a second dovetail groove 25 with a dovetail shape is vertically penetrated through the second extension portion 21, wherein the first dovetail groove 24 is communicated with the second dovetail groove 25;

[0074] An auxiliary member 26, wherein the auxiliary member 26 vertically penetrates the first dovetail groove 24 and the second dovetail groove 25, and the outer wall of the auxiliary member 26 is fitted to the inner wall of the first dovetail groove 24 and the second dovetail groove 25, an L-shaped anti-rotation member 27 is provided on the top of the auxiliary member 26, and an anti-rotation hole 28 is opened on the top of the positioning tube 23, one end of the anti-rotation member 27 is connected to the auxiliary member 26, and the other end is interference fit to the inner wall of the anti-rotation hole 28;

[0075] The first limiting body 12 , the second limiting body 13 , the first limiting buckle 14 , the second limiting buckle 19 , the first extending portion 16 , and the second extending portion 21 are all attached to the outer side of the protective layer 5 .

[0076] The heat absorber and the light overflow protection zone of the power station are both very high. The construction of the light overflow protection zone is located outside the power station, and the protection structure also has a certain quality. Therefore, it requires a lot of work to connect four limit plates 9 and limit nuts 10 to each protection structure. It is not a good solution to carry out construction at a high altitude and in a harsh environment (wind and sand in the desert, high temperature, and large temperature difference between day and night).

[0077] When the protective structure is connected by this embodiment, the heat-resistant insulation layer 2, the thermal insulation layer 3, the waterproof layer 4 and the protective layer 5 in the protective structure are first kept in an integral form under the action of the connecting tube 7. Then the whole structure is sleeved on the four connecting frames 1 at one time. When the position of the heat-resistant insulation layer 2 reaches a suitable position, the side of the limiting groove 11 is just flush with the outer side of the protective layer 5 (or the waterproof coating layer);

[0078] The worker then buckles the first limiting body 12 and the second limiting body 13 into the two limiting grooves 11 on both sides respectively, then takes out the positioning cylinder 23 and tightens the positioning cylinder 23 onto the positioning column 18, and finally inserts the auxiliary component 26 into the first dovetail groove 24 and the second dovetail groove 25 to the deepest point, completing the fixation and installation of the protective structure. The whole process only requires tightening a positioning cylinder 23 and inserting an auxiliary component 26, which is simple and convenient to operate with high efficiency.

[0079] Among them, after the positioning cylinder 23 reaches the appropriate position, its inner wall plays a limiting role on the first limiting semi-cylinder 17 and the second limiting semi-cylinder 22, so that the first extension 16 and the second extension 21 can be prevented from moving away from each other, thereby ensuring that the first limiting body 12 and the first limiting buckle 14, the second limiting body 13 and the second limiting buckle 19 can be stably connected to the four connecting frames 1, and ensuring the position stability of the protective layer 5. At the same time, the first limiting body 12, the second limiting body 13, the first extension 16, and the second extension 21 are all attached to the protective layer 5, so the supporting area of ​​the protective layer 5 is larger, preventing the protective layer 5 from being subjected to internal pressure and external forces. When the excessive force is generated locally, it plays a protective role on the protective layer 5 and prolongs the service life of the entire protective structure.

[0080] Moreover, the long side of the first limiting buckle 14 is shorter than the length of the edge of the first limiting body 12, and the free end of the first limiting buckle 14 on the side close to the first limiting body 12 and the free end of the first limiting body 12 on the side close to the first limiting buckle 14 are both rounded, so that the first opening 15 can be stably and easily inserted into the limiting groove 11; similarly, the shape of the second limiting buckle 19 and the second limiting body 13 can also facilitate the second opening 20 to be inserted into the limiting groove 11, further ensuring the convenience of operation.

[0081] During actual installation, the first opening 15 and the second opening 20 are both interference fits with the limiting groove 11, but the interference fit is small; firstly, it can facilitate the engagement between the first opening 15 and the second opening 20 and the limiting groove 11; secondly, after the engagement, even if the first limiting body 12 or the second limiting body 13 is released, the first limiting body 12 or the second limiting body 13 can temporarily maintain its position without the need for continuous manual operation; secondly, since the edge of the free end of the second limiting semi-cylinder 22 is chamfered or rounded, when the first limiting semi-cylinder 17 and the second limiting semi-cylinder 22 are not completely fitted together, the positioning cylinder 23 can be sleeved on the second limiting semi-cylinder 22, and then the first limiting semi-cylinder 17 and the second limiting semi-cylinder 22 are locked by the inner wall of the positioning cylinder 23, so that the positions of the first limiting body 12 and the second limiting body 13 are appropriately achieved.

[0082] When the first limit strip and the second limit body 13 are both in proper position, the first dovetail groove 24 and the second dovetail groove 25 are also aligned; the cross-section of the bottom of the auxiliary part 26 is smaller, which can facilitate the auxiliary part 26 to pass through the first dovetail groove 24 and the second dovetail groove 25; after passing through, the anti-rotation part 27 is continuously pressed down, and finally the vertical part of the anti-rotation part 27 is inserted into the anti-rotation hole 28, completing the installation of a protective unit; at this time, there is also a certain friction between the auxiliary part 26 and the inner walls of the first dovetail groove 24 and the second dovetail groove 25, which can ensure the position stability of the auxiliary part 26.

[0083] After the auxiliary member 26 is installed, the auxiliary member 26 can further ensure the position stability of the first position limiter 12 and the second position limiter 13 in the horizontal direction, ensure the integrity of the protective structure, and at the same time, the first position limiter 12, the second position limiter 13, etc. have a larger coverage area, thereby further ensuring the integrity of the protective structure. Secondly, the end of the anti-rotation member 27 is inserted into the anti-rotation hole 28, which can prevent the positioning cylinder 23 from rotating, thus preventing the positioning cylinder 23 from falling off, and ensuring the position stability of the first position limiter 12 and the second position limiter 13.

[0084] Example 3

[0085] The thermal insulation layer is an inorganic fiberboard, and the thermal insulation layer comprises the following components by weight:

[0086] 40 parts Al 2 O 3 、55 parts SiO 2 .

[0087] The waterproof layer is made of stainless steel.

[0088] The protective layer is an inorganic fiberboard, and the protective layer comprises the following components by weight:

[0089] 30 parts Al 2 O 3 、60 parts SiO 2 , 5 parts ZrO 2 .

[0090] Example 4

[0091] The thermal insulation layer is an inorganic fiberboard, and the thermal insulation layer comprises the following components by weight:

[0092] 50 parts Al 2 O 3 、50 parts SiO 2 .

[0093] The waterproof layer is made of stainless steel.

[0094] The protective layer is an inorganic fiberboard, and the protective layer comprises the following components by weight:

[0095] 45 parts Al 2 O 3 、45 parts SiO 2 、15 parts ZrO 2 .

[0096] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber, characterized in that: It comprises a connecting frame (1), and a heat-resistant insulation layer (2), a heat-preserving insulation layer (3), a waterproof layer (4), and a protective layer (5) which are sequentially arranged on the connecting frame (1) in a close-fitting manner; The length and width of the heat-resistant insulation layer (2), the thermal insulation layer (3), the waterproof layer (4) and the protective layer (5) are equal, and the length and width of the heat-resistant insulation layer (2), the thermal insulation layer (3) and the waterproof layer (4) are flush, and the waterproof layer (4) and the protective layer (5) are staggered; A plurality of connection holes (6) are provided through the heat-resistant insulation layer (2), the thermal insulation layer (3), the waterproof layer (4) and the protective layer (5); a connection tube (7) is provided in each of the connection holes (6); a connection frame (1) is provided in the connection tube (7); both ends of the connection frame (1) are located outside the connection tube (7); one end of the connection frame (1) is bent to be provided with a consolidation portion (8); and the other end is provided with a limiting mechanism for limiting the protective layer (5); Four connecting frames (1) are provided, and the connecting line of the ends of the four connecting frames (1) is in the form of a square; A limiting groove (11) coaxial with the connecting frame (1) is provided on the outer wall of the connecting frame (1); The limiting mechanism comprises: A first limiting body (12) and a second limiting body (13) are U-shaped and face each other, and the first limiting body (12) and the second limiting body (13) are both vertical; Both ends of the first limiting body (12) are provided with L-shaped first limiting buckles (14) on the outside, a U-shaped first opening (15) is formed between the first limiting buckle (14) and the end of the first limiting body (12), the inner wall of the first opening (15) and the two sides of the first limiting body (12) and the first limiting buckle (14) are all in contact with the inner wall of the limiting groove (11), a first extending portion (16) is horizontally provided in the middle of the first limiting body (12), and a first limiting semi-cylinder (17) and a positioning column (18) are sequentially provided at one end of the first extending portion (16) close to the second limiting body (13); L-shaped second limiting buckles (19) are arranged on the outer sides of both ends of the second limiting body (13); a U-shaped second opening (20) is formed between the second limiting buckle (19) and the end of the second limiting body (13); the inner wall of the second opening (20) and the two sides of the second limiting buckle (19) and the second limiting body (13) are all in contact with the inner wall of the limiting groove (11); a second extending portion (21) is arranged horizontally in the middle of the second limiting body (13); a second limiting semi-cylinder (22) is arranged at one end of the second extending portion (21) close to the first limiting body (12); the outer side of the free end of the second limiting semi-cylinder (22) is rounded or chamfered; the first limiting semi-cylinder (17) and the second limiting semi-cylinder (22) form a cylindrical shape coaxial with the positioning column (18) and having the same diameter; A positioning cylinder (23), one end of which is threadably engaged with the positioning column (18), and the inner wall of the other end of which is in contact with the outer walls of the first limiting semi-cylinder (17) and the second limiting semi-cylinder (22); A first dovetail groove (24) in the shape of a dovetail is vertically penetrated through the first extension portion (16), and a second dovetail groove (25) in the shape of a dovetail is vertically penetrated through the second extension portion (21), wherein the first dovetail groove (24) is communicated with the second dovetail groove (25); an auxiliary component (26), wherein the auxiliary component (26) vertically penetrates the first dovetail groove (24) and the second dovetail groove (25), and the outer wall of the auxiliary component (26) is fitted to the inner wall of the first dovetail groove (24) and the second dovetail groove (25); an L-shaped anti-rotation component (27) is arranged on the top of the auxiliary component (26); an anti-rotation hole (28) is opened on the top of the positioning tube (23); one end of the anti-rotation component (27) is connected to the auxiliary component (26), and the other end is interference fit to the inner wall of the anti-rotation hole (28); The first limiting body (12), the second limiting body (13), the first limiting buckle (14), the second limiting buckle (19), the first extending portion (16) and the second extending portion (21) are all attached to the outer side of the protective layer (5).

2. A high temperature heat insulation protection structure for a tower type solar thermal power station absorber according to claim 1, characterized in that: The heat-resistant insulation layer (2) comprises aerogel felt.

3. The high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber according to claim 1, characterized in that: The thermal insulation layer (3) is an inorganic fiberboard, and comprises the following components by weight: Al2O3, 40-50 parts, SiO2, 50-55 parts.

4. The high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber according to claim 1, characterized in that: The waterproof layer (4) is made of stainless steel.

5. The high-temperature heat insulation protection structure for a tower-type solar thermal power station absorber according to claim 1, characterized in that: The protective layer (5) is an inorganic fiberboard, and comprises the following components in parts by mass: Al2O3, 30-45 parts, SiO2, 45-60 parts; ZrO2, 5-15 parts.

6. A high temperature heat insulation protection structure for a tower type solar thermal power station absorber according to claim 5, characterized in that: A waterproof coating layer is provided on the outer side of the protective layer (5).

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