CN110440458B - Heat absorber tube panel assembly for tower type solar thermal power generation - Google Patents
Heat absorber tube panel assembly for tower type solar thermal power generation Download PDFInfo
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- CN110440458B CN110440458B CN201910706907.2A CN201910706907A CN110440458B CN 110440458 B CN110440458 B CN 110440458B CN 201910706907 A CN201910706907 A CN 201910706907A CN 110440458 B CN110440458 B CN 110440458B
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- transition small
- transition
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- heat absorber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
- F24S10/74—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits are not fixed to heat absorbing plates and are not touching each other
- F24S10/748—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits are not fixed to heat absorbing plates and are not touching each other the conduits being otherwise bent, e.g. zig-zag
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/60—Details of absorbing elements characterised by the structure or construction
- F24S70/65—Combinations of two or more absorbing elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E10/44—Heat exchange systems
Abstract
The invention discloses a heat absorber tube panel component for tower type solar thermal power generation, which comprises: the heat absorption system comprises a confluence header, a plurality of connecting pipe groups, a plurality of small transition headers and a plurality of heat absorption pipe groups. The connecting pipe group comprises a plurality of connecting pipes, the connecting pipes are arranged in the same plane, and the first end of each connecting pipe is communicated with the collecting tank. The second end of the connecting pipe is communicated with the corresponding transition small header. The heat absorption tube group comprises a plurality of heat absorption tubes, and the heat absorption tubes are communicated with the small transition header. The deviation distance between the projections of the axes of the adjacent small transition header tanks on the horizontal plane is larger than or equal to the size of the outer diameter of the heat absorbing pipe. The connecting pipe group comprises at least two connecting pipes. Through introducing the connecting pipe structure of the small transition header, the temperature gradient is dispersed on the confluence header, the connecting pipe, the small transition header and the heat absorption pipe, and the service life of the tower type solar thermal power generation heat absorber is prolonged.
Description
Technical Field
The invention belongs to the technical field of clean energy, and particularly relates to a heat absorber tube panel assembly for tower type solar thermal power generation.
Background
While the economy is continuously developed, the energy is in short supply day by day, the traditional non-renewable energy is exhausted day by day, the economic development is more and more limited by the development and utilization of the energy, the utilization of the renewable energy is generally concerned, and particularly, the solar energy is more concerned by people in the world.
Solar thermal power generation is one of the main ways in which solar energy is currently utilized. The current solar thermal power generation can be divided into tower type solar thermal power generation, trough type solar thermal power generation and disc type solar thermal power generation according to a solar energy collection mode.
In the field of solar thermal power generation, tower type solar thermal power generation becomes a next novel energy technology capable of commercial operation due to the advantages of high light-heat conversion efficiency, high focusing temperature, simple installation and debugging of a control system, low heat dissipation loss and the like.
In the field of tower type solar thermal power generation, a heat absorber is a core component of a tower type solar thermal power generation system. The heliostat reflects sunlight to the heat absorber to heat the heat absorption working medium, so that light energy is converted into heat energy to drive the steam turbine to generate electricity.
The existing heat absorber structure is generally that heat absorbing pipes forming a heat absorbing surface are directly welded with a converging header, and a plurality of rows of heat absorbing pipes are generally connected with the converging header by a plurality of rows of pipes. When working media in the heat absorber change, hot working media firstly enter the confluence box and then enter the heat absorption pipe, the wall thickness of the confluence box is greatly different from that of the heat absorption pipe, the wall temperature change speed of the confluence box and the heat absorption pipe caused by the temperature change of the hot working media is different, so the temperature difference is generated, the wall temperature change of the heat absorption pipe is quick, the wall temperature change of the confluence box is slow, so great thermal stress is generated at the connecting welding seam of the heat absorption pipe and the collection box, particularly, the working media in the heat absorber change extremely quickly in the starting stage and the cloudy working condition, the difference of the thermal stress can bring severe influence, a solar thermal power station needs to be started and stopped every day and often faces the cloudy working condition, the heat absorption pipe of the heat absorber can be exploded for a long time, a unit has to be forced to be stopped, and great economic loss is caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heat absorber tube panel assembly for tower type solar thermal power generation, and solving the problem of short service life of the joint of a heat absorption tube and a converging header.
In order to solve the problems, the technical scheme of the invention is as follows:
the invention relates to a heat absorber tube panel component for tower type solar thermal power generation, which comprises:
an upper junction header;
a lower junction header;
the upper connecting pipe group comprises at least two upper connecting pipes, and the first end of each upper connecting pipe is communicated with the upper converging header;
at least two lower connecting pipe groups, wherein each lower connecting pipe group comprises at least two lower connecting pipes, and the first end of each lower connecting pipe is communicated with the lower converging header;
the second end of each upper connecting pipe is communicated with the upper transition small header;
the second end of each lower connecting pipe is communicated with the lower transition small header;
the heat absorption tube panel is formed by combining a plurality of heat absorption tube sets, each heat absorption tube set comprises a plurality of heat absorption tubes, each heat absorption tube comprises an upper bent tube section, a lower bent tube section and a straight tube section positioned between the upper bent tube section and the lower bent tube section, the upper bent tube section of each heat absorption tube is communicated with the upper transition small header, and the lower bent tube section of each heat absorption tube is communicated with the lower transition small header.
According to the heat absorption tube panel assembly for the tower type solar thermal power generation, the heat absorption tube groups, the upper connecting tube group, the lower connecting tube group, the upper transition small header and the lower transition small header are identical in number and are in one-to-one correspondence.
According to the heat absorber tube panel assembly for the tower type solar thermal power generation, the distance between the projections of the axes of the adjacent upper transition small header tanks on the horizontal plane is larger than or equal to the outer diameter of the heat absorption tube; the distance between the projections of the axes of the adjacent lower transition small header tanks on the horizontal plane is larger than or equal to the outer diameter of the heat absorption pipe.
According to the heat absorber tube panel assembly for the tower type solar thermal power generation, the heat absorbing tubes in each heat absorbing tube group are arranged in parallel, and the distance between the central lines of two adjacent heat absorbing tubes in each heat absorbing tube group is larger than or equal to the product of the outer diameter of each heat absorbing tube and the number of the upper transition small header boxes or the number of the lower transition small header boxes.
According to the heat absorber tube panel assembly for the tower type solar thermal power generation, the upper connecting tubes in each upper connecting tube group are arranged in the same plane, and the lower connecting tubes in each lower connecting tube group are arranged in the same plane.
According to the heat absorber tube panel component for the tower type solar thermal power generation, the connecting points of each connecting tube in the same connecting tube group and the converging header are linearly arranged.
According to the heat absorber tube panel assembly for tower type solar thermal power generation, the connection point of the upper connecting tube and the upper small transition header is positioned vertically above the upper small transition header, and the connection point of the lower connecting tube and the lower small transition header is positioned vertically below the lower small transition header.
According to the heat absorber tube panel assembly for the tower type solar thermal power generation, the height difference between the central axes of the two adjacent upper transition small header tanks is larger than the outer diameter of the upper transition small header tank; and the height difference between the central axes of the two adjacent lower transition small header tanks is greater than the outer diameter of the lower transition small header tank.
According to the heat absorber tube panel assembly for the tower type solar thermal power generation, when the number of the upper transition small header tanks is even, the upper transition small header tanks are arranged in a mirror symmetry mode along a vertical plane passing through the central axis of the upper junction header tank;
when the number of the upper transition small header tanks is odd, one of the upper transition small header tanks is arranged right below the upper junction header tank and is arranged in parallel with the upper junction header tank, and the other upper transition small header tanks are arranged in mirror symmetry along a vertical plane passing through the central axis of the upper junction header tank;
when the number of the lower transition small header tanks is even, the lower transition small header tanks are arranged in a mirror symmetry mode along a vertical plane passing through the central axis of the lower junction header tank;
when the quantity of the lower transition small header is an odd number, one of the lower transition small header is arranged right above the lower junction header and is arranged in parallel with the lower junction header, and the rest lower transition small headers are arranged in mirror symmetry along a vertical plane passing through the central axis of the lower junction header.
According to the heat absorber tube panel assembly for the tower type solar thermal power generation, when the number of the upper transition small header tanks is odd, and the upper transition small header tank positioned right below the upper convergence header tank is communicated with the upper convergence header tank, an included angle between the leading-out direction of the upper connection tube for communicating the upper transition small header tank and the upper transition small header tank from the surface of the upper convergence header tank and the vertical direction is 0 degree, and included angles between the leading-out directions of the other upper connection tubes from the surface of the upper convergence header tank and the vertical direction are 10-45 degrees;
when the number of the upper transition small header tanks is even, the included angle between the direction of the upper connecting pipe led out from the surface of the upper junction header tank and the vertical direction is 10-45 degrees;
when the number of the lower transition small header tanks is odd, and the lower transition small header tank positioned right above the lower junction header tank is communicated with the lower junction header tank, the included angle between the leading-out direction of the lower connecting pipe for communicating the lower transition small header tank and the lower transition small header tank from the surface of the lower junction header tank and the vertical direction is 0 degree, and the included angle between the leading-out direction of the rest of the lower connecting pipes from the surface of the lower junction header tank and the vertical direction is 10-45 degrees;
when the number of the lower transition small header tanks is even, the included angle between the direction of the lower connecting pipe led out from the surface of the lower convergence header tank and the vertical direction is 10-45 degrees.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1. according to the invention, the small transition header and the connecting pipe for connecting the small transition header and the converging header are introduced into the conventional heat absorber, so that the temperature distribution gradient on the heat absorbing pipe, the small transition header, the connecting pipe and the converging header is smaller, and the temperature difference between two adjacent members is smaller, thus the thermal stress on each member can be reduced, and the risk of leakage at the joint of each member can be reduced.
2. In the conventional heat absorber, the heat absorption pipes are directly communicated with the convergence header, and once the connection part of any one heat absorption pipe and the convergence header leaks, the whole heat absorber needs to be shut down.
3. In the conventional heat absorber, each heat absorption pipe is communicated with the convergence header, a large number of communication holes are required to be formed in the convergence header, and the strength of the convergence header is greatly reduced.
4. The heat absorption pipe is a core part in the heat absorber, for a 50MW tower type solar thermal power generation system, the diameter of the heat absorber is about 20m, the height is about 20m, the wall thickness, the material, the quantity and other specification parameters of the heat absorption pipe all need to be designed according to the power generation power of the whole power generation system, the heat absorption efficiency, the manufacturing process and the like of sunlight are designed in a whole, the manufacturing cost is extremely high, the invention introduces a small transition header, and as a single small transition header only receives partial working media in the heat absorber, compared with a converging header, the technical requirements of the small transition header on the wall thickness, the volume, the strength and the like can be greatly reduced, the wall thickness of the small transition header is close to the heat absorption pipe, the risk of pipe explosion of the heat absorption pipe can be greatly reduced, the maintenance cost can be greatly reduced, and the manufacturing cost of the small transition header is much lower than that of the converging header, the cost of replacing transition mini-headers is much lower than the cost of replacing junction headers.
5. In the conventional heat absorber, the heat absorption pipe is directly communicated with the converging header, generally, the heat absorption pipe is required to have high solar absorption efficiency, the wall thickness is generally thin, the converging header is required to have high heat preservation capacity and high temperature and high pressure bearing capacity, therefore, the wall thickness is generally thick, the heat absorption pipe and the converging header also meet other strict technical requirements, the material selection and the manufacture of the heat absorption pipe and the converging header are greatly limited, and the heat absorption pipe and the converging header are difficult to coordinate.
6. The transition small header is introduced, and the transition small header is communicated with the confluence header through the connecting pipe, the connecting pipe only needs to meet the strength requirement and the pressure bearing requirement, the range of the type selection is wide, and compared with the scheme of directly communicating the heat absorption pipe with the confluence header, the manufacturing difficulty, the manufacturing cost and the maintenance cost are greatly reduced.
Drawings
Fig. 1 is a front view of a heat absorber tube panel assembly for tower solar thermal power generation of the present invention;
fig. 2 is a side view of a heat absorber tube panel assembly for tower solar thermal power generation of the present invention;
fig. 3 is a first schematic diagram illustrating a specific arrangement position of a small transition header of the heat absorber tube panel assembly for tower-type solar thermal power generation according to the present invention;
fig. 4 is a schematic diagram of a specific arrangement position of a small transition header of the heat absorber tube panel assembly for tower-type solar thermal power generation of the present invention;
fig. 5 is a schematic diagram showing a specific arrangement position of a small transition header of the heat absorber tube panel assembly for tower-type solar thermal power generation of the present invention;
fig. 6 is a schematic diagram of a specific arrangement position of a small transition header of the heat absorber tube panel assembly for tower-type solar thermal power generation of the present invention;
fig. 7 is a schematic diagram showing a specific arrangement position of another transition small header of the heat absorber tube panel assembly for tower type solar thermal power generation of the present invention;
fig. 8 is a schematic diagram showing a specific arrangement position of another transition small header of the heat absorber tube panel assembly for tower-type solar thermal power generation according to the present invention;
fig. 9 is a schematic diagram showing a specific arrangement position of another small transition header of the heat absorber tube panel assembly for tower-type solar thermal power generation of the present invention;
fig. 10 is a schematic diagram of another specific arrangement position of the small transition header of the heat absorber tube panel assembly for tower type solar thermal power generation of the present invention.
Description of reference numerals: 1: an upper junction header; 2: an upper connecting pipe group; 3: an upper transition small header; 4: a heat absorbing tube; 5: a lower junction header; 6: a lower connecting pipe group; 7: and a lower transition small header.
Detailed Description
The tower type solar thermal power generation heat absorber structure provided by the invention is further described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Referring to fig. 1 and 2, in one embodiment, a heat absorber tube panel assembly for tower solar thermal power generation comprises: an upper collecting tank 1 and a lower collecting tank 5. The upper connecting pipe group 2 comprises at least two upper connecting pipes, and the first end of each upper connecting pipe is communicated with the upper converging header 1; the lower connecting pipe group 6 comprises at least two lower connecting pipes, and the first end of each lower connecting pipe is communicated with the lower converging header 5; the second end of each upper connecting pipe is communicated with the upper transition small header 3; the second end of each lower connecting pipe is communicated with the lower transition small header 7; the heat absorption tube panel is formed by combining a plurality of heat absorption tube sets, each heat absorption tube set comprises a plurality of heat absorption tubes 4, each heat absorption tube 4 comprises an upper bent tube section, a lower bent tube section and a straight tube section positioned between the upper bent tube section and the lower bent tube section, the upper bent tube section of each heat absorption tube 4 is communicated with the upper transition small header 3, and the lower bent tube section of each heat absorption tube 4 is communicated with the lower transition small header 7.
If the lengths of the annular adjacent small transition headers are the same, a fixed deviation distance is required along the axial direction of the small transition headers, and the deviation distance is twice of the outer diameter of the heat absorption pipe 4; if the lengths of the circumferentially adjacent transition headers are different, it is necessary to ensure that the outer diameters of the absorber tubes 44 of the single rows of absorber tubes 4 on the transition headers deviate from each other by a factor of two. By adopting the design, the heat absorbing pipes 4 connected on the small transition header can be ensured to form gapless heat absorbing pipe 4 rows only by single-angle bending in the same plane without multi-angle bending in a three-dimensional space, and the complexity of design and manufacture is greatly simplified. The upper connection pipe set 2 and the upper connection pipe set 2 both comprise at least two connection pipes. The single small header 3 that passes through or the small header 7 that passes through down passes through two piece at least connecting pipes and joins header 1 on with or joins header 5 down and is connected, and is concrete, and the small header 3 that passes through or the small header 7 that passes through that lie in both sides position respectively joins header 1 or joins header 5 down through four connecting pipes and is connected, and the small header that passes through that lie in and join header 1 or join header 5 under or directly over passes through three connecting pipes and joins the header and be connected. Because the upper transition small header 3 or the lower transition small header 7 on both sides need to be connected with the upper junction header 1 or the lower junction header 5 through a bent connecting pipe, and the bent connecting pipe can increase the fluid resistance, the upper transition small header 3 or the lower transition small header 7 on both sides are respectively added with a connecting pipe, and by adopting the design, the hot working medium in the upper junction header 1 or the lower junction header 5 can more uniformly enter the upper transition small header 3 or the lower transition small header 7. The central lines of the heat absorbing pipes 4 in each heat absorbing pipe set are all in the same plane, and the distance between the central lines of the adjacent heat absorbing pipes 4 in each heat absorbing pipe set is larger than or equal to three times of the outer diameter of the heat absorbing pipe 4. By adopting the design, because each upper convergence header 1 or lower convergence header 5 is connected with at least two upper transition small headers 3 or lower transition small headers 7, the heat absorption pipes 4 connected with one sides of the three upper transition small headers 3 or lower transition small headers 7 can form a gapless heat absorption pipe 4 row without a three-dimensional bent pipe through the position deviation of the space of the upper transition small headers 3 or the lower transition small headers 7. By introducing the connecting pipe structure of the upper transition small header 3 or the lower transition small header 7, the temperature gradient is dispersed on the confluence header, the connecting pipe, the transition small header and the heat absorption pipe 4, the temperature of the four is distributed in a step shape, the wall thickness of the transition small header is smaller than that of the heat absorption pipe 4, the temperature change curve is more similar, and larger temperature difference is avoided, so that larger thermal stress is avoided; the temperature difference is mainly embodied at the welding openings of the connecting pipe and the junction box due to different wall thicknesses of the junction box and the connecting pipe, but the wall thickness of the connecting pipe is thicker, the capacity of bearing thermal stress and thermal fatigue is relatively stronger, the risk of pipe explosion caused by the thermal stress can be greatly reduced, and the service life of the tower type solar thermal power generation heat absorber can be greatly prolonged through the transition effect of the small transition junction box and the connecting pipe. In addition, even if the problem of weld leg cracking caused by thermal stress occurs, the connection structure of the conventional heat absorber collecting box and the heat absorbing pipe 4 is difficult to find and maintain due to the fact that the heat absorbing pipe 4 is densely distributed on the collecting box, and for the connection structure of the tower type solar thermal power generation heat absorber collecting box and the heat absorbing pipe 4, when a leakage accident occurs, only the connection pipe group of the small transition collecting box and the weld opening of the collecting box need to be checked preferentially, and the larger space exists between the heat absorber collecting box and the connection pipe of the small transition collecting box, so that the maintenance and replacement work is relatively more convenient. And the structure greatly simplifies the design and manufacturing period, the connecting pipe is directly led into the small transition header from the confluence header without a complex space bent pipe, so that the fluid resistance in the pipe is reduced, the flow deviation in the pipe is reduced, the pipe explosion caused by overhigh local temperature of the heat absorption pipe 4 is prevented, and the design and manufacturing complexity and the production cost are greatly reduced.
In the conventional heat absorber, the heat absorption pipes 4 are directly communicated with the convergence header, and once the connection part of any one heat absorption pipe 4 and the convergence header leaks, the whole heat absorber needs to be shut down. In the conventional heat absorber, each heat absorption pipe 4 is communicated with the convergence header, a large number of communication holes are required to be formed in the convergence header, and the strength of the convergence header is greatly reduced.
Furthermore, the heat absorption tube sets, the upper connecting tube set 2, the lower connecting tube set 6, the upper transition small header 3 and the lower transition small header 7 are the same in number and are in one-to-one correspondence.
Further, the distance between the projections of the axes of the adjacent upper transition small header 3 on the horizontal plane is greater than or equal to the outer diameter of the heat absorbing pipe 4; the distance between the projections of the axes of the adjacent lower transition small headers 7 on the horizontal plane is greater than or equal to the outer diameter of the heat absorbing pipe 4.
Further, the heat absorption pipes 4 in each heat absorption pipe set are arranged in parallel, and the distance between the central lines of two adjacent heat absorption pipes 4 in each heat absorption pipe set is greater than or equal to the product of the outer diameter of each heat absorption pipe 4 and the number of the upper transition small header 3 or the number of the lower transition small header 7. By adopting the design, the adjacent small transition headers in the heat absorber can be arranged in a staggered manner in spatial position, so that the problem that the adjacent small transition headers collide with each other in space is avoided.
Preferably, the upper connecting tubes of each upper connecting tube set 2 are arranged in the same plane, and the lower connecting tubes of each lower connecting tube set 6 are arranged in the same plane.
Furthermore, each connecting pipe in the same connecting pipe group and the communication point of the confluence header are arranged in a straight line.
Further, the connection point of the upper connecting pipe and the upper transition small header 3 is located vertically above the upper transition small header 3, and the connection point of the lower connecting pipe and the lower transition small header 7 is located vertically below the lower transition small header 7.
Through introducing the little collection box of transition, and then will transition little collection box through the connecting pipe with join the collection box intercommunication, because the connecting pipe only need satisfy intensity requirement and pressure-bearing requirement can, the scope of its lectotype needs wide many, compares with direct heat absorption pipe 4 and the scheme that joins the collection box intercommunication, and the manufacturing degree of difficulty, manufacturing cost, maintenance cost all can descend by a wide margin.
Preferably, the height difference between the central axes of two adjacent upper transition small headers 3 is larger than the outer diameter of the upper transition small header 3; the height difference between the central axes of two adjacent lower transition small headers 7 is larger than the outer diameter of the lower transition small header 7.
Further, when the number of the upper transition small header 3 is even, the upper transition small header 3 is arranged in mirror symmetry along a vertical plane passing through the central axis of the upper convergence header 1; when the number of the upper transition small header 3 is odd, one of the upper transition small header 3 is arranged right below the upper convergence header 1 and is arranged in parallel with the upper convergence header 1, and the other upper transition small header 3 is arranged in mirror symmetry along a vertical plane passing through the central axis of the upper convergence header 1; when the number of the lower transition small header 7 is even, the lower transition small header 7 is arranged in mirror symmetry along a vertical plane passing through the central axis of the lower junction header 5; when the number of the lower transition small header 7 is an odd number, one of the lower transition small header 7 is arranged right above the lower junction header 5 and is arranged in parallel with the lower junction header 5, and the rest of the lower transition small header 7 are arranged in mirror symmetry along a vertical plane passing through the central axis of the lower junction header 5.
Further, when the number of the upper transition small header 3 is odd, and the upper transition small header 3 positioned right below the upper junction header 1 is communicated with the upper junction header 1, an included angle between a leading-out direction of an upper connecting pipe for communicating the upper transition small header 3 and the upper junction header 1 from the surface of the upper junction header 1 and the vertical direction is 0 degree, and an included angle between a leading-out direction of the rest of upper connecting pipes from the surface of the upper junction header 1 and the vertical direction is 10-45 degrees; when the number of the upper transition small header 3 is even, the included angle between the direction of the upper connecting pipe led out from the surface of the upper convergence header 1 and the vertical direction is 10-45 degrees; when the number of the lower transition small header 7 is odd, and the lower transition small header 7 positioned right above the lower confluent header 5 is communicated with the lower confluent header 5, an included angle between the leading-out direction of the lower connecting pipe for communicating the lower transition small header 7 and the lower confluent header 5 from the surface of the lower confluent header 5 and the vertical direction is 0 degree, and included angles between the leading-out directions of the other lower connecting pipes from the surface of the lower confluent header 5 and the vertical direction are 10-45 degrees; when the number of the lower transitional small headers 7 is even, the included angle between the direction of the lower connecting pipe led out from the surface of the lower confluent header 5 and the vertical direction is 10-45 degrees. By adopting the design, the strength weakening effect and the hole bridge weakening effect caused by the opening on the header can be reduced as much as possible, and the wall thickness of the header meeting the strength requirement can be reduced as much as possible when the header strength is designed, so that the cost is reduced.
The heat absorption pipe 4 is a core part in the heat absorber, for a 50MW tower type solar thermal power generation system, the diameter of the heat absorber is about 20m, the height is about 20m, the wall thickness, the material quality, the quantity and other specification parameters of the heat absorption pipe 4 all need to be designed according to the power generation power of the whole power generation system, the heat absorption efficiency, the manufacturing process and the like of sunlight are designed in a whole, the manufacturing cost is extremely high, the invention introduces a small transition header, and as a single small transition header only receives partial working medium in the heat absorber, compared with a converging header, the technical requirements of the wall thickness, the volume, the strength and the like of the small transition header can be greatly reduced, the wall thickness of the small transition header is close to the wall thickness of the heat absorption pipe 4, the risk of pipe explosion of the heat absorption pipe 4 can be greatly reduced, therefore, the maintenance cost can be greatly reduced, and the manufacturing cost of the small transition header is much lower than that of, the cost of replacing transition mini-headers is much lower than the cost of replacing junction headers.
In the conventional heat absorber, the heat absorbing pipe 4 is directly communicated with the converging header, generally, the heat absorbing pipe 4 is required to have high solar absorption efficiency, the wall thickness is generally thin, the converging header is required to have high heat preservation capability and high temperature and high pressure bearing capability, therefore, the wall thickness is generally thick, the heat absorbing pipe 4 and the converging header also meet other strict technical requirements, the material selection and the manufacture of the heat absorbing pipe 4 and the converging header are greatly limited, and the heat absorbing pipe 4 and the converging header are difficult to coordinate.
Further, the tube bodies of the heat absorbing tubes connected to different small transition header boxes are bent to enable the central lines of the lower half ends of all the heat absorbing tubes to be in the same plane and enable the lower half ends of the adjacent heat absorbing tubes to have zero gaps.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (9)
1. A heat absorber tube panel assembly for tower solar thermal power generation, comprising:
an upper junction header;
a lower junction header;
the upper connecting pipe group comprises at least two upper connecting pipes, and the first end of each upper connecting pipe is communicated with the upper converging header;
at least two lower connecting pipe groups, wherein each lower connecting pipe group comprises at least two lower connecting pipes, and the first end of each lower connecting pipe is communicated with the lower converging header;
the second end of each upper connecting pipe is communicated with the upper transition small header;
the second end of each lower connecting pipe is communicated with the lower transition small header;
the heat absorption tube panel is formed by combining a plurality of heat absorption tube sets, each heat absorption tube set comprises a plurality of heat absorption tubes, each heat absorption tube comprises an upper bent tube section, a lower bent tube section and a straight tube section positioned between the upper bent tube section and the lower bent tube section, the upper bent tube section of each heat absorption tube is communicated with the upper transition small header, and the lower bent tube section of each heat absorption tube is communicated with the lower transition small header;
when the number of the upper transition small header tanks is even, the upper transition small header tanks are arranged in a mirror symmetry mode along a vertical plane passing through the central axis of the upper junction header tank;
when the number of the upper transition small header tanks is odd, one of the upper transition small header tanks is arranged right below the upper junction header tank and is arranged in parallel with the upper junction header tank, and the other upper transition small header tanks are arranged in mirror symmetry along a vertical plane passing through the central axis of the upper junction header tank;
when the number of the lower transition small header tanks is even, the lower transition small header tanks are arranged in a mirror symmetry mode along a vertical plane passing through the central axis of the lower junction header tank;
when the number of the lower transition small header tanks is odd, one lower transition small header tank is arranged right above the lower junction header tank and is arranged in parallel with the lower junction header tank, and the other lower transition small header tanks are arranged in mirror symmetry along a vertical plane passing through the central axis of the lower junction header tank;
wherein the number of the upper connection pipes of the upper connection pipe group positioned at both sides of the upper junction header is greater than the number of the upper connection pipes of the upper connection pipe group positioned directly below the upper junction header;
the number of the lower connection pipes of the lower connection pipe group located on both sides of the lower junction header is larger than the number of the lower connection pipes of the lower connection pipe group located directly above the lower junction header.
2. The heat absorber tube panel assembly for tower solar thermal power generation according to claim 1, wherein the number of heat absorber tube banks, upper connecting tube banks, lower connecting tube banks, upper transition small headers, and lower transition small headers are the same and in one-to-one correspondence.
3. The heat absorber tube panel assembly for tower solar thermal power generation according to claim 1, wherein a spacing between projections of axes of adjacent upper transition small headers on a horizontal plane is greater than or equal to an outer diameter of the heat absorber tubes; the distance between the projections of the axes of the adjacent lower transition small header tanks on the horizontal plane is larger than or equal to the outer diameter of the heat absorption pipe.
4. The heat absorber tube panel assembly for tower solar thermal power generation according to claim 2, wherein the heat absorber tubes in each heat absorber tube bank are arranged in parallel side by side, and the distance between the centerlines of two adjacent heat absorber tubes in each heat absorber tube bank is greater than or equal to the product of the outer diameter of the heat absorber tubes and the number of upper transition small headers or the number of lower transition small headers.
5. The heat absorber tube panel assembly for tower solar thermal power generation of claim 1, wherein the plurality of upper connection tubes in each upper connection tube bank are disposed in a common plane and the plurality of lower connection tubes in each lower connection tube bank are disposed in a common plane.
6. The heat absorber tube panel assembly for tower solar thermal power generation according to claim 1, wherein each of the upper or lower connection tubes in the same upper or lower connection tube bank is arranged in a straight line with a connection point of the upper or lower header.
7. The heat absorber tube panel assembly for tower solar thermal power generation of claim 1, wherein the connection point of the upper connecting tube to the upper transition small header is vertically above the upper transition small header and the connection point of the lower connecting tube to the lower transition small header is vertically below the lower transition small header.
8. The heat absorber tube panel assembly for tower solar thermal power generation according to claim 1, wherein the height difference between the central axes of two adjacent upper transition small headers is greater than the outer diameter of the upper transition small header; and the height difference between the central axes of the two adjacent lower transition small header tanks is greater than the outer diameter of the lower transition small header tank.
9. The heat absorber tube panel assembly for tower solar thermal power generation according to claim 1,
when the number of the upper transition small header tanks is odd, and the upper transition small header tank positioned right below the upper junction header tank is communicated with the upper junction header tank, an included angle between the leading-out direction of an upper connecting pipe for communicating the upper transition small header tank and the upper transition small header tank from the surface of the upper junction header tank and the vertical direction is 0 degree, and included angles between the leading-out direction of the other upper connecting pipes from the surface of the upper junction header tank and the vertical direction are 10-45 degrees;
when the number of the upper transition small header tanks is even, the included angle between the direction of the upper connecting pipe led out from the surface of the upper junction header tank and the vertical direction is 10-45 degrees;
when the number of the lower transition small header tanks is odd, and the lower transition small header tank positioned right above the lower junction header tank is communicated with the lower junction header tank, the included angle between the leading-out direction of the lower connecting pipe for communicating the lower transition small header tank and the lower transition small header tank from the surface of the lower junction header tank and the vertical direction is 0 degree, and the included angle between the leading-out direction of the rest of the lower connecting pipes from the surface of the lower junction header tank and the vertical direction is 10-45 degrees;
when the number of the lower transition small header tanks is even, the included angle between the direction of the lower connecting pipe led out from the surface of the lower convergence header tank and the vertical direction is 10-45 degrees.
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| 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 |
| US10295224B1 (en) * | 2013-11-08 | 2019-05-21 | National Technology & Engineering Solutions Of Sandia, Llc | Bladed solar thermal receivers for concentrating solar power |
| CN104101112B (en) * | 2014-07-11 | 2015-11-18 | 上海锅炉厂有限公司 | A kind of solar energy heating receiver |
| CN105157243A (en) * | 2015-09-10 | 2015-12-16 | 北京首航艾启威节能技术股份有限公司 | Novel heat absorber of tower-type photo-thermal power station |
| CN106839454B (en) * | 2017-01-21 | 2022-07-01 | 江苏双良锅炉有限公司 | Tower type solar thermal power station molten salt heat absorber |
| CN207196455U (en) * | 2017-09-28 | 2018-04-06 | 哈尔滨锅炉厂有限责任公司 | Collect the multistage collection box structure of single tube extraction suitable for the multitube of 630 DEG C of grade boilers |
| DE102017123455A1 (en) * | 2017-10-10 | 2019-04-11 | Bilfinger Engineering & Technologies Gmbh | Receiver, power plant and process for the thermal utilization of solar energy |
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