CN108489122B - Tower type solar molten salt heat absorber heat preservation structure - Google Patents
Tower type solar molten salt heat absorber heat preservation structure Download PDFInfo
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- CN108489122B CN108489122B CN201810499622.1A CN201810499622A CN108489122B CN 108489122 B CN108489122 B CN 108489122B CN 201810499622 A CN201810499622 A CN 201810499622A CN 108489122 B CN108489122 B CN 108489122B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
The invention discloses a tower type solar molten salt heat absorber heat insulation structure, which comprises an inlet and outlet header heat insulation module and a straight pipe row heat insulation module, wherein the inlet and outlet header heat insulation module is arranged outside an inlet header and/or an outlet header of a heat absorber and comprises a box body structure unit, a box body heat insulation unit and a first electric heating unit; the straight pipe row heat preservation module is arranged on the backlight side of the straight pipe row of the heat absorber and comprises an inner guard plate, a second electric heating unit and a second heat preservation assembly. According to the heat preservation structure of the tower type solar molten salt heat absorber, the double sealing structure is adopted at the contact position of the heat preservation box and the straight pipe row of the heat absorber, so that air leakage of a contact surface is avoided, free expansion and contraction of the heat absorption pipe are ensured, and the heating effect and the heat preservation effect of the electric heater are ensured; meanwhile, the fixing mode of the heat insulation material is optimized, and the heat insulation structure is simplified; in addition, the heat insulation structure is easy to realize modularization, is convenient for site construction and reduces the difficulty of high-altitude operation.
Description
Technical Field
The invention relates to the technical field of solar photo-thermal power generation, in particular to a tower type solar fused salt heat absorber heat preservation structure.
Background
The heat absorber is one of core equipment of the tower type solar photo-thermal power station, receives solar energy focused by the heliostat and converts the solar energy into heat energy of working media, the heat working media exchange heat with water in a steam generation system to generate steam meeting the air inlet requirement of a steam turbine, and the steam turbine is driven to apply work, so that solar thermal power generation is realized.
For tower solar heat absorbers, the heating surface of the tower solar heat absorber is usually in a tube wall type structure, namely, a heat absorbing medium flows in a tube, and the tubes are arranged into a plane or an arc surface. According to the characteristic of high condensation ratio of the tower type solar power station, the light-receiving surface of the heat absorber heat receiving pipe needs to bear higher heat load, so that a larger temperature difference exists between the inner side and the outer side of the heat absorbing pipe heated on one side, and therefore, a heat insulation structure is required to be designed on the backlight surface of the heat absorber.
For a tower type fused salt heat absorber with 50MW grade and heated outer surface, the local heat flux density can reach 1000kW/m 2 The above. In the high heat flux area, the temperature difference between the inner side and the outer side of the heat absorption tube exceeds 200 ℃, if the heat insulation structure is unreasonably designed, the heat absorption tube panel of the heat absorber can be seriously deformed. Under the constraint of the heat absorber structure, the heat absorbing pipe needs to bear high stress, and the heat insulating structure needs to ensure free expansion and contraction of the heating surface pipe in normal operation.
The heat absorber tube panel and the heat preservation housing are generally designed to be in flexible contact, but the heat preservation housing is easy to deform after being heated, so that the distance between the heat preservation housing and the tube panel contact surface is gradually increased; in addition, the heat absorber is arranged on a high tower with the height of about 200 meters, the high-altitude wind level is equal to the hurricane level, the heat preservation effect is greatly reduced under the strong convection effect of high-altitude air, and the heater is difficult to preheat the inlet and outlet header to the set temperature when serious. Meanwhile, fins are not arranged between the heat absorption pipes of the light pipe heat absorber, and the heat insulation material is difficult to fix. The common practice of adding the strengthening rib on the outer backplate and bearing the heat preservation structure load through the strengthening rib often influences the result of use because of the structure is complicated, take root difficulty etc..
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide an optimized and improved heat-preserving structure of a tower type solar molten salt heat absorber, solve the sealing problem at the contact position of an insulation box and a straight-section tube bank of the heat absorber, avoid air leakage at the contact surface and ensure the heating and heat-preserving effects in the insulation box; the heat absorption pipe can be freely expanded and contracted when the fused salt heat absorber operates, and bending deformation of the heat absorption pipe is avoided; optimize the fixing mode of the heat insulation material and simplify the heat insulation structure.
The invention provides a tower type solar molten salt heat absorber heat insulation structure, which comprises an inlet and outlet header heat insulation module and a straight pipe row heat insulation module, wherein,
the inlet and outlet header heat preservation module is arranged outside the inlet header and/or the outlet header of the heat absorber and comprises a tank body structural unit, a tank body heat preservation unit and a first electric heating unit, wherein the tank body structural unit is arranged around the inlet header and/or the outlet header and is fixed on a steel structure of the heat absorber; the box body heat preservation unit comprises a first heat preservation component paved on the outer wall of the box body structural unit and a sealing unit arranged between the opening of the box body structural unit and the straight pipe row; the first electric heating unit is fixed on the inner wall of the box body structural unit;
the straight section tube bank heat preservation module is arranged on the backlight side of the straight section tube bank of the heat absorber and comprises an inner guard plate, a second electric heating unit and a second heat preservation assembly, wherein the inner guard plate is tightly clung to the straight section tube bank and is paved on the outer wall of the inner guard plate, and the second electric heating unit is also paved on the outer wall of the inner guard plate and is located between the inner guard plate and the second heat preservation assembly.
According to one embodiment of the tower type solar molten salt heat absorber heat preservation structure, the box body structure unit comprises a panel, a supporting plate, a reinforcing rib, a truss and a box body fixing piece, wherein,
the panel is arranged around the inlet header and/or the outlet header and comprises a light-facing surface panel and a backlight surface panel, the reinforcing ribs are vertically fixed on the outer wall of the panel and encircle the panel along the section outline of the panel, the truss is arranged between the light-facing surface panel and the backlight surface panel, the box body structural unit is fixed on the steel structure of the heat absorber through the box body fixing piece, wherein an opening is formed in the junction of the panel and the straight tube row, and the opening is sealed by the supporting plate.
According to one embodiment of the tower type solar molten salt heat absorber heat preservation structure, the vertical distance between the panel and the outer surface of the header pipe is 200-400 mm; the reinforcing ribs are arranged in a plurality of rows, the spacing between adjacent rows of reinforcing ribs is 600-1000 mm, the width of the reinforcing ribs is 80-120 mm, and the thickness of the reinforcing ribs is 3-5 mm; and a drain pipe is also arranged below the box body structural unit.
According to one embodiment of the heat preservation structure of the tower type solar molten salt heat absorber, the first heat preservation assembly comprises a first outer protection plate, a first heat preservation material layer and a first heat preservation metal piece, the first outer protection plate is fixed on the outer wall of the panel through the first heat preservation metal piece, the first heat preservation material layer is arranged between the first outer protection plate and the panel, and the light facing surface of the first outer protection plate is coated with a high-temperature resistant reflection coating.
According to one embodiment of the heat insulation structure of the tower type solar molten salt heat absorber, the sealing unit comprises a first sealing layer and a second sealing layer, the first sealing layer is a loose cotton filling layer which is filled between the panel and the support plate and is arranged close to the opening, the second sealing layer is a double-layer high-temperature composite plate arranged on the support plate, one end of the second sealing layer is tightly attached to the outer surface of the light facing side of the straight tube row, and the other end of the second sealing layer is flush with the support plate.
According to one embodiment of the tower type solar fused salt heat absorber heat preservation structure, the scattered cotton filling layer is formed by aluminum silicate refractory fiber scattered cotton, and the double-layer high-temperature composite plate is of a comb-shaped plate structure and is made of Pairo block ceramic fibers.
According to one embodiment of the heat preservation structure of the tower type solar fused salt heat absorber, the inner guard plate is fixed on the steel structure of the heat absorber through the fixing piece, and one side, close to the straight tube row, of the inner guard plate is coated with a high-temperature-resistant reflection coating.
According to one embodiment of the heat insulation structure of the tower type solar molten salt heat absorber, the second heat insulation assembly comprises a second outer protection plate, a second heat insulation material layer and a second heat insulation metal piece, the second outer protection plate is fixed on the outer wall of the inner protection plate through the second heat insulation metal piece, and the second heat insulation material layer is arranged between the second outer protection plate and the inner protection plate.
According to one embodiment of the tower type solar molten salt heat absorber heat insulation structure, first expansion joints are arranged in the second heat insulation material layer at intervals of 3-5 m, and the first expansion joints are preferably arranged on two sides of a bearing ring or a supporting hanger in a steel structure of the heat absorber; a second expansion joint is arranged at the boundary between the inlet and outlet header heat preservation module and the straight pipe row heat preservation module, and the second expansion joint is preferably arranged at two sides of a fixing piece of the straight pipe row heat preservation module and is wound with aluminum silicate refractory fiber ropes or filled mineral fiber materials; the widths of the first expansion gap and the second expansion gap are 30-40 mm.
According to one embodiment of the heat preservation structure of the tower type solar molten salt heat absorber, the first electric heating unit is a radiation type electric heater, the second electric heating unit is an MI electric tracing band, and the MI electric tracing band is fixed on the outer wall of the inner guard plate through a stainless steel band and heat conducting cement.
Compared with the prior art, the heat-insulating structure of the tower type solar molten salt heat absorber adopts a double-sealing structure at the contact position of the heat-insulating box and the straight-section tube row of the heat absorber, so that air leakage of a contact surface is avoided, free expansion and contraction of the heat-absorbing tube are ensured, and the heating effect and the heat-insulating effect of the electric heater are ensured; meanwhile, the fixing mode of the heat insulation material is optimized, and the heat insulation structure is simplified; in addition, the heat insulation structure is easy to realize modularization, is convenient for site construction and reduces the difficulty of high-altitude operation.
Drawings
Fig. 1 shows a schematic structural view of a tower solar molten salt absorber insulation structure according to an exemplary embodiment of the invention.
Fig. 2 shows a schematic structure of fig. 1 with all insulation omitted.
Reference numerals illustrate:
the heat-insulating material comprises a steel structure of a 1-first outer protecting plate, a 2-first heat-insulating material layer, a 3-first heat-insulating metal piece, a 4-first sealing layer, a 5-second sealing layer, a 6-first electric heating unit, a 7-panel, 8-reinforcing ribs, a 9-truss, a 10-box fixing piece, an 11-inner protecting plate, a 12-second electric heating unit, a 13-fixing piece, a 14-second outer protecting plate, a 15-second heat-insulating material layer, a 16-second heat-insulating metal piece, a 17-supporting plate, an 18-opening, a 19-inlet header, a 20-outlet header, a 21-straight pipe row and a 22-heat absorber.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Fig. 1 illustrates a schematic structural view of a tower type solar molten salt heat absorber insulation structure according to an exemplary embodiment of the present invention, and fig. 2 illustrates a schematic structural view of fig. 1 with all insulation materials omitted.
As shown in fig. 1 and 2, according to an exemplary embodiment of the present invention, the tower type solar molten salt heat absorber insulation structure includes an inlet and outlet header insulation module and a straight tube bank insulation module, wherein the inlet and outlet header insulation module performs preheating and insulation of the inlet and outlet header through a first electric heating unit, and the straight tube bank insulation module performs preheating and insulation of the heat absorbing tube through a second electric heating unit.
The structures of the inlet and outlet header heat preservation module and the straight pipe row heat preservation module are specifically described below.
According to the invention, the inlet header insulation module is arranged outside the inlet header 19 and/or the outlet header 20 of the heat absorber and comprises a tank construction unit, a tank insulation unit and a first electric heating unit 6.
Wherein the tank construction units are arranged around the inlet header 19 and/or the outlet header 20 and are fixed to the steel structure 22 of the heat absorber; the box body heat preservation unit comprises a first heat preservation component paved on the outer wall of the box body structural unit and a sealing unit arranged between the opening of the box body structural unit and the straight pipe row; the first electric heating unit 6 is fixed on the inner wall of the box structural unit.
Preferably, the case structural unit is fixed to the steel structure 22 of the heat absorber by the case fixing member 10, and the case fixing member 10 should be provided according to the steel structure 22 of the heat absorber to ensure the safety and stability of the case structural unit. It is further preferable that a drain pipe (not shown) is further provided below the tank structural unit to drain accumulated water in time in the case where rainwater is poured into the incubator.
Specifically, the box structural unit includes a panel 7, a support plate 17, a reinforcing rib 8, a truss 9, and a box fixing member 10. The panel 7 is arranged around the inlet header 19 and/or the outlet header 20 and comprises a light-facing panel and a backlight panel, the panel 7 being provided with an opening 18 at the junction with the straight tube row 21 and the opening 18 being sealed by a support plate 17, the diameter of the opening 18 being able to be increased by 10mm on the basis of the diameter of the absorber tube without impeding the free collapsing of the device. Wherein the vertical distance between the face plate 7 and the outer surface of the header pipe is preferably 200-400 mm, which leaves a certain margin for the expansion of the pipe while avoiding interference.
The reinforcing ribs 8 are vertically fixed to the outer wall of the panel 7 and are wound around one turn along the cross-sectional profile of the panel 7, the reinforcing ribs 8 are preferably arranged in a plurality of rows, the spacing between adjacent rows of reinforcing ribs 8 is 600 to 1000mm, the width of the reinforcing ribs is 80 to 120mm, and the thickness is 3 to 5mm. The material of the reinforcing ribs 8 is preferably the same as that of the panel 7.
Truss 9 sets up between face panel and the back light face panel, and truss 9's effect has: 1) The rigidity of the structure is enhanced, and the heat insulation failure caused by air leakage at the sealing position of the heat insulation box and the heat absorber pipe due to bending deformation of the light-facing surface panel is prevented; 2) The load of the light facing panel is transferred to the case fixture 10 and ultimately to the steel structure 22 of the absorber.
When the arrangement of the box body structural units is carried out, the arrangement forms of the panel 7, the reinforcing ribs 8 and the truss 9 can be fully adjusted according to the power and the structural form of the first electric heating unit 6, and the box body structure cannot interfere with the normal operation of the first electric heating unit 6. Preferably, the first electric heating unit 6 may be a radiant electric heater.
The first heat preservation subassembly in the box heat preservation unit includes first backplate 1, first heat preservation material layer 2 and first heat preservation metalwork 3, and first backplate 1 is fixed on the outer wall of panel 7 through first heat preservation metalwork 3, and first heat preservation material layer 2 sets up between first backplate 1 and panel 7. The light-facing surface of the first outer guard plate 1 is coated with a high-temperature-resistant reflective coating, and the back surface of the first outer guard plate can be uncoated. The first heat-preserving metal piece 3 may be a heat-preserving support pin, a wire mesh or the like.
The sealing unit comprises a first sealing layer 4 and a second sealing layer 5, wherein the first sealing layer 4 is a scattered cotton filling layer which is filled between the panel 7 and the supporting plate 17 and the straight tube row and is close to the opening 18, can be formed by scattered cotton of aluminum silicate refractory fibers and is fixed on the panel 7 by using a wire netting and the like, and then the air convection at the opening 18 is effectively slowed down. The second sealing layer 5 is a double-layer high-temperature composite plate arranged on the supporting plate 17, one end of the second sealing layer 5 is closely attached to the outer surface of the light facing side of the straight tube row 21, and the other end is flush with the supporting plate 17, the double-layer high-temperature composite plate is preferably a comb-shaped plate structure so as to avoid interference with a tube screen and is preferably made of Pairo block ceramic fibers, the material has good heat shock resistance and very low thermal expansion rate (0.3 multiplied by 10) -6 ) The working temperature is up to 1649 ℃, the weather resistance is good, and the service life can reach 30 years. In addition, the scattered cotton of the first sealing layer 4 and the high-temperature composite board of the second sealing layer 5 have certain flexibility, and free expansion and contraction of the heat absorption pipe can be ensured.
Wherein the support plate 17 is actually part of a panel, which is arranged at the opening 18, and one end of which close to the heat absorbing tube is at a distance of about 5mm from the outer surface of the heat absorbing tube, and the other end of which is flush with the heat insulating material layer 2, which can play two roles: 1) Supporting and fixing the second sealing layer 5; 2) The end of the first heat insulating material layer 2 is closed to prevent the infiltration of rainwater.
According to the present invention, the straight tube bank heat preservation module is provided on the backlight side of the straight tube bank 21 of the heat absorber and includes the inner shield 11, the second electric heating unit 12, and the second heat preservation assembly. The inner guard plate 11 is closely attached to the straight pipe row 21, and the inner guard plate 11 is simultaneously fixed on the steel structure 22 of the heat absorber through the fixing piece 13, so that the load of the heat insulation module of the straight pipe row is transmitted to the steel structure of the heat absorber through the fixing piece 13. In addition, one side of the inner guard plate 11, which is tightly attached to the straight pipe row 21, is coated with a high-temperature-resistant reflective coating, so that a part of energy can be reflected to the backlight side of the heat absorption pipe by treatment, the actual heating area of the pipe along the circumferential direction is increased, the heating concentration of the pipe is reduced, the difference between the heating of the light facing side and the heating of the backlight side of the pipe is reduced, the problems of serious deformation and overhigh bearing stress caused by uneven heating of the light facing side and the backlight side of the pipe are relieved, and the safety margin of the operation of a heating surface is increased.
The second heat preservation subassembly is laid on the outer wall of inner shield 11, and the second heat preservation subassembly includes second outer shield 14, second heat preservation material layer 15 and second heat preservation metalwork 16, and second outer shield 14 is fixed on the outer wall of inner shield 11 through second heat preservation metalwork 16, and second heat preservation material layer 15 sets up between second outer shield 14 and inner shield 11. The second heat retaining hardware 16 may also be heat retaining support nails, wire mesh, or the like.
First expansion gaps are arranged in the second heat insulation material layer 15 at intervals of 3-5 m, and the first expansion gaps are preferably arranged on two sides of a bearing ring or a supporting and hanging bracket in the steel structure of the heat absorber; the second expansion joint is arranged at the boundary between the inlet and outlet header heat-insulating module and the straight pipe row heat-insulating module, and the second expansion joint is preferably arranged at two sides of the fixing piece of the straight pipe row heat-insulating module and is wound with aluminum silicate refractory fiber ropes or filled mineral fiber materials, so that the heat-insulating effect at the boundary can be ensured, and the structure can be prevented from being damaged in operation. Preferably, the width of the first expansion gap and the second expansion gap is 30-40 mm.
The second electric heating unit 12 is also laid on the outer wall of the inner shield 11 and is located between the inner shield 11 and the second insulation assembly, the second electric heating unit 12 preferably being an MI electric tracing band which is secured to the outer wall of the inner shield 11 by a stainless steel band and a heat conductive cement.
In the heat-insulating structure of the tower type solar molten salt heat absorber, attention is paid to the design of two sides of a fixing piece of the straight pipe row heat-insulating module at the boundary part of the straight pipe row heat-insulating module and the inlet and outlet header heat-insulating module: 1) The arrangement of the panel 7, the reinforcing ribs 8 and the inner guard plate 11 cannot interfere with the fixing devices such as the tube panel clamps of the heat absorber, and corresponding expansion intervals are reserved; 2) The first outer cover and the second outer cover are subjected to lap joint treatment, and allow free expansion while preventing rain water from entering; 3) The arrangement of the first heat-preserving metal piece and the second heat-preserving metal piece cannot interfere with the tube panel clamp of the heat absorber, and cannot prevent the free expansion of the heat absorber tube.
In the heat insulation structure of the tower type solar molten salt heat absorber, the heat insulation layer with the heat insulation function is directly fixed on the inner guard plate arranged on the backlight surface of the straight pipe row or the box body panel arranged on the periphery of the inlet and outlet header, so that the conventional method for directly fixing the heat insulation layer on the heat absorber device is changed, the fixing mode of heat insulation materials is optimized, the design difficulty of the heat insulation structure is reduced, the heat insulation structure is modularized by the change, the on-site construction is convenient, and the high-altitude operation difficulty is reduced.
In addition, the integral heat insulation structure can play the following three roles:
1) Preheating: the heat absorber is heated to a set temperature (such as 300 ℃) by using a first electric heating unit in the inlet and outlet header heat preservation module and a second electric heating unit at the back of the straight pipe row, so that the metal is prevented from being impacted by hot molten salt;
2) And (3) an operation stage: as a heat preservation and insulation layer, the local heat loss of the heat absorber is reduced, and the serious deformation and even breakage of a tube panel of a heating surface caused by the existence of a larger temperature difference between the inner side and the outer side of a heat absorption tube are avoided, so that the safe operation of the whole tower type solar thermal power generation system is influenced;
3) Salt removal stage: the first electric heating unit in the inlet and outlet header heat preservation module and the second electric heating unit at the back of the straight pipe row stabilize the heat absorber within a certain temperature range, so that molten salt condensation is effectively prevented, and salt discharge is facilitated.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (6)
1. A tower type solar molten salt heat absorber heat insulation structure is characterized in that the heat insulation structure comprises an inlet and outlet header heat insulation module and a straight pipe row heat insulation module, wherein,
the inlet and outlet header heat preservation module is arranged outside the inlet header and/or the outlet header of the heat absorber and comprises a tank body structural unit, a tank body heat preservation unit and a first electric heating unit, wherein the tank body structural unit is arranged around the inlet header and/or the outlet header and is fixed on a steel structure of the heat absorber; the box body heat preservation unit comprises a first heat preservation component paved on the outer wall of the box body structural unit and a sealing unit arranged between the opening of the box body structural unit and the straight pipe row; the first electric heating unit is fixed on the inner wall of the box body structural unit;
the straight-section tube bank heat preservation module is arranged on the backlight side of the straight-section tube bank of the heat absorber and comprises an inner guard plate, a second electric heating unit and a second heat preservation assembly, wherein the inner guard plate is tightly clung to the straight-section tube bank and is paved on the outer wall of the inner guard plate, and the second electric heating unit is also paved on the outer wall of the inner guard plate and is positioned between the inner guard plate and the second heat preservation assembly;
the box body structure unit comprises a panel, a supporting plate, reinforcing ribs, a truss and a box body fixing piece, wherein the panel is arranged around the inlet header and/or the outlet header and comprises a light-facing surface panel and a backlight surface panel, the reinforcing ribs are vertically fixed on the outer wall of the panel and surround one circle along the section outline of the panel, the truss is arranged between the light-facing surface panel and the backlight surface panel, the box body structure unit is fixed on a steel structure of the heat absorber through the box body fixing piece, an opening is formed in the junction of the panel and a straight pipe row, and the opening is sealed by the supporting plate;
the first heat preservation assembly comprises a first outer protection plate, a first heat preservation material layer and a first heat preservation metal piece, wherein the first outer protection plate is fixed on the outer wall of the panel through the first heat preservation metal piece, the first heat preservation material layer is arranged between the first outer protection plate and the panel, and the incident surface of the first outer protection plate is coated with a high-temperature-resistant reflection coating;
the sealing unit comprises a first sealing layer and a second sealing layer, wherein the first sealing layer is a scattered cotton filling layer filled between the panel and the support plate and close to the opening, the second sealing layer is a double-layer high-temperature composite plate arranged on the support plate, one end of the second sealing layer is tightly attached to the outer surface of the light facing side of the straight tube row, and the other end of the second sealing layer is flush with the support plate;
the second heat preservation assembly comprises a second outer guard plate, a second heat preservation material layer and a second heat preservation metal piece, wherein the second outer guard plate is fixed on the outer wall of the inner guard plate through the second heat preservation metal piece, and the second heat preservation material layer is arranged between the second outer guard plate and the inner guard plate.
2. The tower type solar molten salt heat absorber heat preservation structure according to claim 1, wherein the vertical distance between the panel and the outer surface of the header pipe is 200-400 mm; the reinforcing ribs are arranged in a plurality of rows, the spacing between adjacent rows of reinforcing ribs is 600-1000 mm, the width of the reinforcing ribs is 80-120 mm, and the thickness of the reinforcing ribs is 3-5 mm; and a drain pipe is also arranged below the box body structural unit.
3. The tower type solar molten salt heat absorber heat preservation structure according to claim 1, wherein the scattered cotton filling layer is formed by scattered cotton of aluminum silicate refractory fibers, and the double-layer high-temperature composite plate is of a comb-shaped plate structure and is made of Pairo block ceramic fibers.
4. The heat preservation structure of the tower type solar molten salt heat absorber according to claim 1, wherein the inner guard plate is fixed on a steel structure of the heat absorber through a fixing piece, and one side, close to the straight tube row, of the inner guard plate is coated with a high-temperature-resistant reflection coating.
5. The tower type solar molten salt heat absorber heat preservation structure according to claim 1, wherein first expansion gaps are arranged in the second heat preservation material layer every 3-5 m, and the first expansion gaps are arranged on two sides of a bearing ring or a supporting hanger in a steel structure of the heat absorber; a second expansion joint is arranged at the boundary between the inlet and outlet header heat preservation module and the straight pipe row heat preservation module, and the second expansion joint is arranged at two sides of a fixing piece of the straight pipe row heat preservation module and is wound with aluminum silicate refractory fiber ropes or filled mineral fiber materials; the widths of the first expansion gap and the second expansion gap are 30-40 mm.
6. The tower solar molten salt heat absorber insulation structure of claim 1, wherein the first electrical heating unit is a radiant electric heater, the second electrical heating unit is an MI electrical tracing band, and the MI electrical tracing band is fixed on the outer wall of the inner guard plate through a stainless steel band and heat-conducting cement.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109489271A (en) * | 2018-11-22 | 2019-03-19 | 上海电气集团股份有限公司 | A kind of solar energy thermal-power-generating heat-absorption device temperature regulating device and its operation method |
| CN109899997A (en) * | 2019-03-15 | 2019-06-18 | 东方电气集团东方锅炉股份有限公司 | A kind of tower photo-thermal power station heat dump high temperature insulating safeguard structure |
| CN110081624A (en) * | 2019-04-10 | 2019-08-02 | 上海电气集团股份有限公司 | Solar energy thermal-power-generating heat-absorption device header heat insulating device |
| CN113494780B (en) * | 2020-03-19 | 2022-06-24 | 浙江大学 | Heat preservation device and heat preservation method for solar tower type heat absorber |
| CN114353345B (en) | 2022-01-13 | 2023-06-02 | 南京工业大学 | Ultra-supercritical tower type solar heat absorber |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103842740A (en) * | 2011-07-29 | 2014-06-04 | 巴布科克和威尔科克斯能量产生集团公司 | Shop assembled vertical serpentine flow molten salt solar receiver |
| CN204128216U (en) * | 2014-10-11 | 2015-01-28 | 东方电气集团东方锅炉股份有限公司 | A kind of tower type solar heat dump |
| CN106839454A (en) * | 2017-01-21 | 2017-06-13 | 江苏双良锅炉有限公司 | A kind of novel tower-type solar energy thermo-power station fused salt heat dump |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2911914A1 (en) * | 1979-03-27 | 1980-10-09 | Bbc Brown Boveri & Cie | Constructional module for solar collector - has intermediate plastics cover(s), with length adapted to shortest absorber and whose surface has transverse bends on opposite ends |
| CN202267255U (en) * | 2011-09-22 | 2012-06-06 | 长沙锅炉厂有限责任公司 | Insulating box for tower-type heat absorber system capable of generating electricity from heat of solar energy |
| CN102345858B (en) * | 2011-09-28 | 2013-06-12 | 东方电气集团东方锅炉股份有限公司 | Solar cavity-type heat absorber capable of generating overheated steam |
| ES2425996B1 (en) * | 2012-03-01 | 2014-12-05 | Abengoa Solar New Technologies, S.A. | Solar plate receiver |
| CN203010564U (en) * | 2012-12-24 | 2013-06-19 | 东方电气集团东方锅炉股份有限公司 | Tube panel structure of tower-type solar heat absorber |
| CN104676919B (en) * | 2015-03-04 | 2016-09-14 | 杭州锅炉集团股份有限公司 | The solar energy tower type heat extractor of a kind of biserial tubular construction and method for designing thereof |
| CN205980401U (en) * | 2016-08-24 | 2017-02-22 | 东方电气集团东方锅炉股份有限公司 | A insulation can that is used for solar energy fused salt heat absorber collection case |
| DE202017000575U1 (en) * | 2017-02-03 | 2017-06-06 | Rainer Müller | Solar ceramic exterior facade |
| CN207350970U (en) * | 2017-07-27 | 2018-05-11 | 东方电气集团东方锅炉股份有限公司 | A kind of fused salt heat dump tube panel preheating and anti-condensation protective device |
| CN208365850U (en) * | 2018-05-23 | 2019-01-11 | 东方电气集团东方锅炉股份有限公司 | A kind of tower type solar fused salt heat dump insulation construction |
-
2018
- 2018-05-23 CN CN201810499622.1A patent/CN108489122B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103842740A (en) * | 2011-07-29 | 2014-06-04 | 巴布科克和威尔科克斯能量产生集团公司 | Shop assembled vertical serpentine flow molten salt solar receiver |
| CN204128216U (en) * | 2014-10-11 | 2015-01-28 | 东方电气集团东方锅炉股份有限公司 | A kind of tower type solar heat dump |
| CN106839454A (en) * | 2017-01-21 | 2017-06-13 | 江苏双良锅炉有限公司 | A kind of novel tower-type solar energy thermo-power station fused salt heat dump |
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