Brush structure heat preservation device for photo-thermal power generation heat absorption pipe

Abstract

The brush structure heat preservation device comprises a plurality of heat preservation pieces, the heat preservation pieces are made of flexible heat preservation materials, the surfaces of the heat preservation pieces are located in the horizontal direction, the heat preservation pieces are arranged side by side in the vertical direction at intervals, and the left side edges of the heat preservation pieces are free ends capable of swinging up and down; a heat preservation strip is arranged on the right side between every two adjacent heat preservation pieces, the upper surface of each heat preservation strip is attached to the corresponding heat preservation piece located on the upper surface of the heat preservation strip, the lower surface of each heat preservation strip is attached to the corresponding heat preservation piece located on the lower surface of the heat preservation strip, and the multiple heat preservation pieces and the multiple heat preservation strips form a heat preservation block of a brush structure. The left side end face of the brush structure heat preservation block is a heat preservation sealing face. The brush structure heat preservation device for the photo-thermal power generation heat absorption pipe is good in heat preservation performance, small in heat dissipating capacity, small in sealing gap and capable of preventing the photo-thermal power generation heat absorption pipe from generating large heat loss, and therefore effective and stable operation of heat absorber equipment is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of solar thermal power generation, and specifically to a heat absorption pipe brush structure thermal insulation device for a molten salt thermal energy storage and heating technology field in solar thermal power generation. Background Art

[0002] Solar thermal power generation has large-capacity energy storage, stable power generation, and is friendly to the power grid. As a path of new energy power generation, it has great development potential. The heat absorber is the core equipment of a solar thermal power station, which is used to absorb the light of the sun and convert it into the thermal energy of molten salt. A common tower-type solar thermal power station heat absorber is an external cylindrical heat absorber. The light-receiving section of the tube screen composed of heat absorption pipes is directly exposed to the external environment. Strong winds, low temperatures, rain, snow, etc. in the environment will cause a large amount of heat loss of the heat absorber tube screen and reduce the photothermal conversion efficiency of the heat absorber. In the non-light-receiving section of the tube screen, although there is a thermal insulation structure, there is also a problem of large heat dissipation.

[0003] Currently, the thermal insulation structure on the back of the light-receiving section of the tube screen is mainly a flat thermal insulation structure. The tube screen and the thermal insulation are in line contact, which has defects such as large heat dissipation and easy material dropping after water absorption. The thermal insulation structure of the non-light-receiving section of the tube screen is a cavity structure composed of thermal insulation materials. The thermal insulation cavities of each tube screen are connected in series. The parts where the tube screen and the tube connection penetrate through the thermal insulation cavity are processed into a groove structure matching the tube, which has problems of large gaps and large heat dissipation. Therefore, there is an urgent need for a new structure to solve the existing problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat absorption pipe brush structure thermal insulation device for solar thermal power generation, which has good thermal insulation performance, small heat dissipation, small sealing gap, can avoid large heat loss of the heat absorption pipe for solar thermal power generation, and thus ensure the effective and stable operation of the heat absorber equipment.

[0005] The heat absorption pipe brush structure thermal insulation device for solar thermal power generation of the present invention includes a plurality of thermal insulation sheets. The thermal insulation sheets are made of flexible thermal insulation materials. The surface of the thermal insulation sheets is in the horizontal direction. The plurality of thermal insulation sheets are arranged in parallel at intervals in the vertical direction. The left side edge of the thermal insulation sheet is a free end that can swing up and down. A thermal insulation strip is provided on the right side between adjacent thermal insulation sheets. The upper surface of each thermal insulation strip is attached to one thermal insulation sheet above it, and the lower surface of each thermal insulation strip is attached to one thermal insulation sheet below it. The plurality of thermal insulation sheets and the plurality of thermal insulation strips form a brush structure thermal insulation block. The left end face of the brush structure thermal insulation block is a thermal insulation sealing surface;

[0006] At the top of the right half of the brush structure heat preservation block, there is an upper pressing plate. At the bottom of the right half of the brush structure heat preservation block, there is a lower pressing plate. On the right end face of the brush structure heat preservation block, there is a right attaching plate. The top of the right attaching plate is fixedly connected to the right side edge of the upper pressing plate, and the bottom of the right attaching plate is fixedly connected to the right side edge of the lower pressing plate. The brush structure heat preservation block is fixed between the upper pressing plate and the lower pressing plate by more than one pull rod passing through the brush structure heat preservation block along the vertical direction. On the right-facing end face of the right attaching plate, there is a heat insulation and heat preservation block fixedly installed.

[0007] Preferably, between the upper pressing plate and the lower pressing plate, a plurality of brush structure heat preservation blocks are arranged side by side along the left-right direction, and the heat preservation sheets on two adjacent brush structure heat preservation blocks are arranged with their positions staggered from each other.

[0008] Preferably, between the upper pressing plate and the lower pressing plate, 2 - 4 brush structure heat preservation blocks are arranged side by side along the left-right direction, and 2 - 3 heat insulation and heat preservation blocks are fixedly installed on the right-facing end face of the right attaching plate from left to right.

[0009] Preferably, each heat preservation sheet is made of aluminum silicate fiber paper and / or ceramic fiber paper and / or aerogel heat preservation material and / or ceramic fiber cloth, and the heat preservation strip is made of aluminum silicate fiber paper and / or ceramic fiber paper and / or aerogel heat preservation material and / or ceramic fiber cloth.

[0010] Preferably, on the right attaching plate, a plurality of horizontal pull rods for fixing the heat insulation and heat preservation blocks are arranged along the left-right horizontal direction.

[0011] Preferably, the upper pressing plate, the lower pressing plate and the right attaching plate are made of stainless steel plates.

[0012] Preferably, the brush structure heat preservation block is a rectangular body.

[0013] When the brush structure heat preservation device for a solar thermal power generation heat absorption tube of the present invention is in use, the left side of the brush structure heat preservation block can be abutted against the side wall of the solar thermal power generation heat absorption tube. By adjusting the distance between the brush structure heat preservation block and the heat absorption tube, extrusion is generated between a plurality of heat preservation sheets and the heat absorption tube, causing the plurality of heat preservation sheets to deform to adapt to the shape of the heat absorption tube, and a sealed cavity with good heat preservation performance is formed between the plurality of heat preservation sheets. The labyrinth seal structure formed between the plurality of heat preservation sheets and the heat absorption tube can block the flow of air, achieving the effect of sealing and heat preservation for the heat absorption tube. Therefore, the brush structure heat preservation device for a solar thermal power generation heat absorption tube of the present invention has the characteristics of good heat preservation performance, small heat dissipation, small sealing gap, being able to avoid large heat loss of the solar thermal power generation heat absorption tube, and thus ensuring the effective and stable operation of the heat absorber device.

[0014] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0015] Figure 1The front view of the heat absorption tube brush structure heat preservation device for solar thermal power generation of the present invention;

[0016] Figure 2 is Figure 1 the side view of;

[0017] Figure 3 The structural schematic diagram of the upper pressing plate, lower pressing plate and right attaching plate parts of the heat absorption tube brush structure heat preservation device for solar thermal power generation of the present invention;

[0018] Figure 4 is Figure 3 the top view of;

[0019] Figure 5 The structural schematic diagram of the heat absorption tube brush structure heat preservation device for solar thermal power generation of the present invention in the working state;

[0020] Figure 6 Another structural schematic diagram of the heat absorption tube brush structure heat preservation device for solar thermal power generation of the present invention in the working state. Detailed implementation manners

[0021] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, the heat absorption tube brush structure heat preservation device for solar thermal power generation of the present invention includes a plurality of heat preservation sheets 1. The heat preservation sheets 1 are made of a flexible heat preservation material that can be bent by hand. The surfaces of the heat preservation sheets 1 are in the horizontal direction. The plurality of heat preservation sheets 1 are arranged in parallel at intervals in the vertical direction. The left side edges of the heat preservation sheets 1 are free ends that can swing up and down. Heat preservation strips 2 are provided on the right sides between adjacent heat preservation sheets 1. The upper surface of each heat preservation strip 2 is attached to one heat preservation sheet 1 above it, and the lower surface of each heat preservation strip 2 is attached to one heat preservation sheet 1 below it. The plurality of heat preservation sheets 1 and the plurality of heat preservation strips 2 form a brush structure heat preservation block 3. The left end face of the brush structure heat preservation block 3 is a heat preservation sealing surface;

[0022] Referring to Figure 1 , the brush structure heat preservation block 3 is divided into multiple layers up and down. If the topmost heat preservation sheet 1 is relatively wide in size, then the layer below the corresponding position of the heat preservation sheet 1 is a relatively narrow heat preservation strip 2, and the layer below the corresponding position is still a relatively wide heat preservation sheet 1, and so on in turn, blocking the gas passage.

[0023] At the top of the right half of the brush structure heat preservation block 3, there is an upper pressing plate 4. At the bottom of the right half of the brush structure heat preservation block 3, there is a lower pressing plate 5. On the right end face of the brush structure heat preservation block 3, there is a right attaching plate 6. The top end of the right attaching plate 6 is fixedly connected to the right side edge of the upper pressing plate 4, and the bottom end of the right attaching plate 6 is fixedly connected to the right side edge of the lower pressing plate 5. The brush structure heat preservation block 3 is fixed between the upper pressing plate 4 and the lower pressing plate 5 by more than one pull rod 7 that passes through the brush structure heat preservation block 3 in the vertical direction. On the right-facing end face of the right attaching plate 6, there is a heat insulation and heat preservation block 8 fixedly installed.

[0024] As a further improvement of the present invention, between the above-mentioned upper pressing plate 4 and lower pressing plate 5, a plurality of brush structure heat preservation blocks 3 are arranged in parallel along the left-right direction, and the heat preservation sheets 1 on two adjacent brush structure heat preservation blocks 3 are arranged with staggered positions.

[0025] As a further improvement of the present invention, between the above-mentioned upper pressing plate 4 and lower pressing plate 5, 2 - 4 brush structure heat preservation blocks 3 are arranged in parallel along the left-right direction, and 2 - 3 heat insulation and heat preservation blocks 8 are fixedly installed from left to right on the right-facing end face of the right attaching plate 6.

[0026] As a further improvement of the present invention, each of the above-mentioned heat preservation sheets 1 is made of aluminosilicate fiber paper and / or ceramic fiber paper and / or aerogel heat preservation material and / or ceramic fiber cloth, and the heat preservation strip 2 is made of aluminosilicate fiber paper and / or ceramic fiber paper and / or aerogel heat preservation material and / or ceramic fiber cloth. The first heat preservation block 1 and the second heat preservation block 2 are respectively fixedly connected to the steel frame 9 of the heat absorber by fasteners, and the surface of the steel frame 9 is provided with a high-temperature heat preservation coating.

[0027] As a further improvement of the present invention, a plurality of horizontal pull rods 10 for fixing the heat insulation and heat preservation blocks 8 are arranged on the right attaching plate 6 along the left-right horizontal direction.

[0028] As a further improvement of the present invention, the above-mentioned upper pressing plate 4, lower pressing plate 5 and right attaching plate 6 are made of stainless steel plates.

[0029] As a further improvement of the present invention, the above-mentioned brush structure heat preservation block 3 is a rectangular body.

[0030] When the brush structure heat preservation device for the solar thermal power generation heat absorption tube of the present invention is in use, as Figure 5 and Figure 6As shown, the left side of the brush structure heat preservation block 3 can be abutted against the side wall of the solar thermal power absorption pipe 11. By adjusting the distance between the brush structure heat preservation block 3 and the absorption pipe 11, extrusion is caused between multiple heat preservation sheets 1 and the absorption pipe 11, so that the multiple heat preservation sheets 1 are deformed to adapt to the shape of the absorption pipe 11, and a sealed cavity with good heat preservation performance is formed between the multiple heat preservation sheets 1. The labyrinth seal structure formed between the multiple heat preservation sheets 1 and the absorption pipe 11 can block the flow of air, achieving the effect of sealing and heat preservation for the absorption pipe 11. Therefore, the brush structure heat preservation device for the solar thermal power absorption pipe of the present invention has the characteristics of good heat preservation performance, small heat dissipation, small sealing gap, being able to avoid large heat loss of the solar thermal power absorption pipe, and thus ensuring the effective and stable operation of the absorber device.

[0031] The embodiments described above are only for describing the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary engineering and technical personnel in the art to the technical solution of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. Brush structure heat preservation device for heat absorption pipe of solar thermal power generation, Characterized in that: It includes a plurality of heat preservation sheets (1), the heat preservation sheets (1) are made of flexible heat preservation materials, the surfaces of the heat preservation sheets (1) are in the horizontal direction, a plurality of heat preservation sheets (1) are arranged side by side at intervals in the vertical direction, the left side edge of the heat preservation sheet (1) is a free end that can swing up and down, and a heat preservation strip (2) is arranged on the right side between adjacent heat preservation sheets (1). The upper surface of each heat preservation strip (2) is attached to one heat preservation sheet (1) above it, and the lower surface of each heat preservation strip (2) is attached to one heat preservation sheet (1) below it. A plurality of heat preservation sheets (1) and a plurality of heat preservation strips (2) form a brush structure heat preservation block (3), and the left end face of the brush structure heat preservation block (3) is a heat preservation sealing surface; At the top of the right half of the brush structure heat preservation block (3), there is an upper pressing plate (4), at the bottom of the right half of the brush structure heat preservation block (3), there is a lower pressing plate (5), on the right end face of the brush structure heat preservation block (3), there is a right attaching plate (6). The top of the right attaching plate (6) is fixedly connected to the right side edge of the upper pressing plate (4), and the bottom of the right attaching plate (6) is fixedly connected to the right side edge of the lower pressing plate (5). The brush structure heat preservation block (3) is fixed between the upper pressing plate (4) and the lower pressing plate (5) through more than one pull rod (7) passing through the brush structure heat preservation block (3) in the vertical direction, and a heat insulation and heat preservation block (8) is fixed on the right-facing end face of the right attaching plate (6).

2. The brush structure heat preservation device for heat absorption pipe of solar thermal power generation according to claim 1, Characterized in that: A plurality of brush structure heat preservation blocks (3) are arranged side by side in the left-right direction between the upper pressing plate (4) and the lower pressing plate (5), and the heat preservation sheets (1) on two adjacent brush structure heat preservation blocks (3) are arranged with staggered positions.

3. The brush structure heat preservation device for heat absorption pipe of solar thermal power generation according to claim 2, Characterized in that: 2 - 4 brush structure heat preservation blocks (3) are arranged side by side in the left-right direction between the upper pressing plate (4) and the lower pressing plate (5), and 2 - 3 heat insulation and heat preservation blocks (8) are fixedly connected from left to right on the right-facing end face of the right attaching plate (6).

4. The brush structure heat preservation device for heat absorption pipe of solar thermal power generation according to claim 3, Characterized in that: Each of the heat preservation sheets (1) is made of aluminum silicate fiber paper and / or ceramic fiber paper and / or aerogel heat preservation material and / or ceramic fiber cloth, and the heat preservation strips (2) are made of aluminum silicate fiber paper and / or ceramic fiber paper and / or aerogel heat preservation material and / or ceramic fiber cloth. The first heat preservation block (1) and the second heat preservation block (2) are respectively fixedly connected to the steel frame (9) of the heat absorber by fasteners, and the surface of the steel frame (9) is provided with a high-temperature heat preservation coating.

5. The brush structure heat preservation device for heat absorption pipe of solar thermal power generation according to claim 4, Characterized in that: A plurality of horizontal pull rods (10) for fixing the heat insulation and heat preservation blocks (8) are arranged on the right attaching plate (6) in the left-right horizontal direction.

6. The brush structure heat preservation device for heat absorption pipe of solar thermal power generation according to claim 5, Characterized in that: The upper pressing plate (4), the lower pressing plate (5) and the right attaching plate (6) are made of stainless steel plates.

7. The brush structure heat preservation device for a heat absorption pipe of a solar thermal power generation, as described in any one of claims 1 to 6, characterized in that: The brush structure heat preservation block (3) is a rectangular body.

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