Header module of heat absorber

Abstract

A plurality of header units are annularly arranged, each header unit comprises a header assembly and a heat tracing part, the header assembly comprises a header body and a plurality of connecting pipes, the header body is communicated with corresponding heat absorption straight pipes in a light receiving section of a heat absorption pipe panel through the connecting pipes, and the heat tracing part is arranged on the header body. And the heat tracing part is further arranged to wrap the surface of the header assembly, so that the effects of reducing heat loss of the header assembly and maintaining normal operation of the heat absorber can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photothermal power generation, and in particular relates to a heat absorber header module. Background Art

[0002] As a clean, renewable new energy source, solar energy is increasingly widely used in production and life. Among them, tower solar thermal utilization technology is an emerging solar energy utilization technology, which uses a large number of heliostats to focus sunlight on the absorber set at the top of the tower, heat the low-temperature heat storage medium (such as molten salt) in the absorber, and convert the low-temperature heat storage medium into a high-temperature heat storage medium. The high-temperature heat storage medium is then transported to the heat-using system to utilize the thermal energy stored in the high-temperature heat storage medium. Therefore, the absorber is the core equipment in tower solar thermal utilization technology.

[0003] The tower solar thermal absorber includes multiple tube panel assemblies, each of which includes an upper header, a heat absorbing tube panel, a lower header, and an auxiliary support structure, wherein the heat absorbing tube panel includes an upper curved pipe section, a straight pipe section, and a lower curved pipe section connected in sequence from top to bottom, the upper curved pipe section is used to achieve the connection between the straight pipe section and the upper header, and the lower curved pipe section is used to achieve the connection between the lower header and the straight pipe section. Since the upper and lower headers in the tube panel assembly cannot be directly irradiated by the sunlight reflected by the heliostat, the heat storage medium such as molten salt flowing in the absorber will condense when it is cold, so insulation measures need to be taken for the upper and lower headers, as well as the upper curved pipe section and the lower curved pipe section of the absorber tube panel. In the prior art, the upper header, the lower header, and the upper curved pipe section and the lower curved pipe section are generally insulated by an insulation box. However, since the heat absorbing tube panel will expand and displace when heated, a large gap will be generated in the portion of the insulation box through which the heat absorbing tube panel passes. Rainwater and cold wind will enter the insulation box through the gap, resulting in poor insulation effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a heat absorber header module to solve the problem that the existing header insulation solution has poor insulation effect and affects the normal operation of the heat absorber.

[0005] To solve the above problems, the technical solution of the utility model is:

[0006] A heat absorber header module of the utility model comprises a plurality of header units arranged in an annular direction;

[0007] The header unit includes a header assembly and a heating part;

[0008] The header assembly includes a header body and a plurality of connecting pipes;

[0009] The first end of each of the connecting tubes is connected to the corresponding header body, and the second end of each of the connecting tubes is connected to the corresponding heat absorbing straight tube in the light receiving section of the heat absorbing tube screen of the heat absorber;

[0010] The heating portion is coated on the surface of the header assembly.

[0011] The heat absorber header module of the utility model further comprises a first heat-insulating portion in the header unit, and the first heat-insulating portion is coated on the outside of the heating portion.

[0012] The heat absorber header module of the utility model further comprises a second heat preservation part in the header unit, and the second heat preservation part is arranged between the heating part and the first heat preservation part.

[0013] The heat absorber header module of the utility model further comprises a connecting piece in the header unit, one side of the connecting piece is fixedly connected to the outer side wall of the first heat insulation part, and the other side of the connecting piece is configured to press the heating part against the light-facing surface of the connecting pipe.

[0014] The heat absorber header module of the utility model further comprises an outer protective structure, which is arranged around the light-facing surface of each header unit to prevent the concentrated sunlight from directly irradiating the header unit.

[0015] The heat absorber header module of the utility model has a connecting gap between two adjacent header units, and a gap insulation part and a gap insulation protection part are arranged at the connecting gap; the gap insulation part is filled in the connecting gap, and the gap protection part covers the light-facing surface of the gap insulation part.

[0016] The heat absorber header module of the utility model, the connecting piece includes a plurality of embedded parts and a comb-shaped sealing plate;

[0017] Several of the embedded parts are fixed at intervals along the length direction of the collecting box body to the light-facing surface of the corresponding connecting pipe; the comb-shaped sealing plate is connected to each of the embedded parts, and the comb-shaped notches of the comb-shaped sealing plate correspond to the connecting pipes one by one, respectively, for pressing the heating part to the light-facing surface of the connecting pipe, and the side of the comb-shaped sealing plate away from the connecting pipe is fixedly connected to the outer side wall of the corresponding first insulation part.

[0018] In the heat absorber header module of the utility model, the embedded part is connected to the comb-shaped sealing plate through a waist hole, and the length direction of the waist hole is parallel to the length direction of the header body.

[0019] The heat absorber header module of the utility model, the heating part includes electric heating, and the second heat insulation part includes heat insulation cloth;

[0020] The electric heat tracing is wound around the header body and the connecting pipe, the heat preservation cloth is wound around or covered around the header body and the connecting pipe, and the heat preservation cloth wraps the electric heat tracing.

[0021] Due to the adoption of the above technical solution, the utility model has the following advantages and positive effects compared with the prior art:

[0022] 1. In the prior art, the heat preservation of the header assembly is achieved through a structure similar to an insulation box. In this scheme, since there is a large gap between the side wall of the insulation box and the header assembly, the electric heating device or the electric heat tracing device needs a large space for heating and heat preservation, which consumes a lot of electric energy. In addition, at the position where the heat absorption pipe passes through the insulation box, the heat absorption pipe will expand and displace, so it cannot be effectively sealed, causing rainwater and cold wind to pour into the insulation box, resulting in large heat dissipation losses and poor insulation effect. The present invention provides a heat tracing part and uses the first insulation part to cover the header assembly, which can effectively reduce the space required for insulation, reduce heat dissipation losses, and reduce power consumption while achieving a good insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the heat absorber header module corresponding to the lower header of the utility model;

[0024] Figure 2 It is a partial enlarged view of the lower header corresponding to the heat absorber header module of the utility model;

[0025] Figure 3 It is a cross-sectional schematic diagram of a comb-shaped sealing plate of a heat absorber header module of the utility model;

[0026] Figure 4 It is a schematic diagram of the heat absorber header module corresponding to the upper header of the utility model;

[0027] Figure 5 It is a partial enlarged view of the upper header corresponding to the heat absorber header module of the present invention.

[0028] Figure 6 It is a schematic diagram of a connection gap formed by combining two adjacent header units in the heat absorber header module of the present invention.

[0029] Explanation of the reference numerals: 1. header body; 2. connecting pipe; 3. circumferential insulation layer; 4. circumferential inner protective layer; 5. insulation cloth; 6. embedded parts; 7. comb-shaped sealing plate; 8. light-receiving section of heat-absorbing tube panel; 9. external protective structure; 10. tube panel frame. DETAILED DESCRIPTION

[0030] The advantages and features of the present invention will be more clearly understood from the following description and claims.

[0031] See also Figures 1 to 6 In one embodiment, a heat absorber header module includes a plurality of header units arranged in an annular direction.

[0032] The header unit includes a header assembly and a heating part. The header assembly includes a header body and a plurality of connecting pipes, the first end of each connecting pipe is connected to the corresponding header body, and the second end of each connecting pipe is respectively connected to the corresponding heat absorbing straight pipe in the light receiving section 8 of the heat absorbing tube screen of the absorber. In each header unit, the heating part is coated on the surface of the header assembly, and is used to provide heat to the header body 1 and the connecting pipe 2 to prevent the heat storage medium (such as molten salt) therein from condensing. Specifically, the heating part can be electric heating, which is wound around the header body 1 and the connecting pipe 2. Among them, the light receiving section 8 of the heat absorbing tube screen refers to the part of the heat absorbing tube screen used to receive sunlight reflected by the heliostat.

[0033] In addition, the header unit further includes a first heat-insulating portion, and the first heat-insulating portion is coated on the outside of the heating portion.

[0034] In this embodiment, a heating portion is provided, and the first heat-insulating portion is covered on the outside of the heating portion, which can effectively reduce the space required for heat preservation, reduce heat dissipation losses, and reduce the consumption of electric energy while achieving a good heat-insulating effect.

[0035] The specific structure of the heat absorber header module of this embodiment is further described below:

[0036] In this embodiment, the header body 1 can be either an upper header or a lower header, and the header body 1 is arranged horizontally. The connecting pipe 2 is usually not vertical, but is arranged to have a certain curvature. In order to provide auxiliary support for the heat absorbing tube panel, a tube panel frame 10 is usually arranged on the backlight side of the heat absorbing tube panel, and the tube panel frame 10 is also extended to the light side at the top and bottom, and the purpose of the extension is to form a frame structure corresponding to the upper and lower headers and the connecting pipe 2.

[0037] In this embodiment, in order to further protect the header assembly, an external protection structure 9 is provided on the light-facing surface of the frame structure. The external protection structure 9 is arranged around the light-facing surface of each header unit to prevent the concentrated sunlight from directly irradiating the header unit.

[0038] In this embodiment, the header assembly further includes a second heat-insulating portion, which is disposed between the electric heat tracing and the first heat-insulating portion. The second heat-insulating portion is coated or wrapped around the header body 1 and the connecting pipe 2 (wrapping the electric heat tracing). In this embodiment, the second heat-insulating portion is a heat-insulating cloth 5.

[0039] In this embodiment, the header unit further includes a connector, one side of which is fixedly connected to the outer wall of the first heat preservation part, and the other side of the connector is configured to press the heating part against the light-facing surface of the connecting pipe 2 .

[0040] Specifically, the above-mentioned connecting parts may include a plurality of embedded parts 6 and a comb-shaped sealing plate 7. If the embedded parts 6 are arranged at intervals along the length direction of the header body 1 on the side of the corresponding connecting pipe 2 located on the light-facing surface (located in the space formed by the outer protective structure 9 and the above-mentioned connecting pipe), and the comb-shaped notches of the comb-shaped sealing plate 7 correspond to the connecting pipes 2 one by one. The body of the comb-shaped sealing plate 7 is used to cover and seal the gap between the second heat-insulating part and the first heat-insulating part, and the comb-shaped teeth of the comb-shaped sealing plate 7 are used to press the above-mentioned second heat-insulating part to the connecting pipe screen, thereby eliminating the gap between the second heat-insulating part and the connecting pipe 2.

[0041] Furthermore, the comb-shaped sealing plate 7 is connected to each embedded part 6 through a waist hole, and the length direction of the waist hole is parallel to the length direction of the header body, so that the comb-shaped sealing plate 7 and each embedded part 6 can be relatively displaced along the length direction of the waist hole. Since the heat absorbing tube (connecting tube 2 and heat absorbing straight tube) in the heat absorbing tube screen will expand due to heat, by setting the waist hole, and making the length direction of the waist hole parallel to the length direction of the header body, the waist hole can absorb the expansion difference of the comb-shaped sealing plate 7 relative to the heat absorbing straight tube in this direction. At the same time, the length direction of the waist hole is set to be parallel to the length direction of the header body, so as to avoid the relative displacement of the comb-shaped sealing plate 7 and each embedded part 6 in the direction perpendicular to the length direction of the waist hole, so that the first heat preservation part, the second heat preservation part and the heating part can always be pressed against the connecting tube to ensure the heat preservation and sealing effect. Specifically, in this embodiment, the waist hole is set on each embedded part 6, and the comb-shaped sealing plate 7 is provided with a connection hole (such as a round hole) at a position corresponding to each embedded part 6, and the fastener (such as a bolt) is connected to the embedded part 6 and the comb-shaped sealing plate 7 by passing through the waist hole on the embedded part 6 and the corresponding connection hole on the comb-shaped sealing plate 7. Of course, in other embodiments, the waist hole can also be set at a position corresponding to the comb-shaped sealing plate 7 and each embedded part 6, and a connection hole is set on each embedded part 6.

[0042] Furthermore, a bending section may be provided on a side of the comb-shaped sealing plate 7 away from the connecting tube panel, and the bending section may be fixedly connected to the outer wall surface of the first heat-insulating part on the light-facing side.

[0043] Since the header body 1 is a cylinder, the connecting pipe 2 also extends in the direction away from the header body 1 within the area defined by the plane where the two end faces of the header body 1 in the axial direction are located, but the heat absorber as a whole is approximately circular, so the adjacent header units are not arranged along a straight line, but will form a certain angle, which will cause a connection gap between the adjacent header units. Therefore, in this embodiment, a gap insulation part and a gap insulation protection part are provided at the connection gap; the gap insulation part is filled in the connection gap, and the gap protection part covers the light-facing surface of the gap insulation part. By providing the gap insulation part, heat can be prevented from being dissipated from there to the outside, and by providing the gap insulation protection part, sunlight reflected by the heliostat can be prevented from directly hitting the gap insulation part.

[0044] In this embodiment, the first heat-insulating portion may specifically include a circumferential heat-insulating layer 3 and a circumferential inner protective layer 4. The circumferential heat-insulating layer 3 (specifically, two layers, the inner layer is a heat-insulating material layer, and the outer layer may be a heat-insulating layer with a heat-insulating effect) is coated on the outer side of the second heat-insulating portion, and the circumferential inner protective layer 4 is coated on the outer side of the circumferential heat-insulating layer 3.

[0045] This embodiment can effectively improve the insulation effect by directly and tightly covering the heating part, the first insulation part and the second insulation part on the outer surface of the header body 1 and the connecting pipe 2 in each header assembly, and avoids the large amount of space and materials required for setting up the insulation box, and the structure is more optimized and reasonable.

[0046] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A heat absorber header module, characterized in that: It includes a plurality of header units arranged in a circumferential direction; The header unit includes a header assembly and a heating part; The header assembly includes a header body and a plurality of connecting pipes; The first end of each of the connecting tubes is connected to the corresponding header body, and the second end of each of the connecting tubes is connected to the corresponding heat absorbing straight tube in the light receiving section of the heat absorbing tube screen of the heat absorber; The heating portion is coated on the surface of the header assembly.

2. The heat absorber header module according to claim 1, characterized in that: The header unit also includes a first heat-insulating portion, which is coated on the outside of the heating portion.

3. The heat absorber header module according to claim 2, characterized in that: The header unit further includes a second heat-insulating portion, which is disposed between the heating portion and the first heat-insulating portion.

4. The heat absorber header module according to claim 2, characterized in that: The header unit further includes a connecting piece, one side of which is fixedly connected to the outer wall of the first heat-insulating portion, and the other side of which is configured to press the heating portion against the light-facing surface of the connecting pipe.

5. The heat absorber header module according to claim 1, characterized in that: It also includes an outer protective structure, which is arranged around the light-facing surface of each of the header units to prevent the concentrated sunlight from directly hitting the header units.

6. The heat absorber header module according to claim 3, characterized in that: A connecting gap is left between two adjacent header units, and a gap insulation part and a gap insulation protection part are arranged at the connecting gap; the gap insulation part is filled in the connecting gap, and the gap protection part covers the light-facing surface of the gap insulation part.

7. The heat absorber header module according to claim 4, characterized in that: The connecting piece includes a plurality of embedded parts and a comb-shaped sealing plate; Several of the embedded parts are fixed at intervals along the length direction of the collecting box body to the light-facing surface of the corresponding connecting pipe; the comb-shaped sealing plate is connected to each of the embedded parts, and the comb-shaped notches of the comb-shaped sealing plate correspond to the connecting pipes one by one, respectively, for pressing the heating part to the light-facing surface of the connecting pipe, and the side of the comb-shaped sealing plate away from the connecting pipe is fixedly connected to the outer side wall of the corresponding first insulation part.

8. The heat absorber header module according to claim 7, characterized in that: The embedded part is connected to the comb-shaped sealing plate through a waist hole, and the length direction of the waist hole is parallel to the length direction of the header body.

9. The heat absorber header module according to claim 3, characterized in that: The heating part includes electric heating, and the second heat-insulating part includes heat-insulating cloth; The electric heat tracing is wound around the header body and the connecting pipe, the heat preservation cloth is wound around or covered around the header body and the connecting pipe, and the heat preservation cloth wraps the electric heat tracing.

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