CN102345858B - Solar cavity-type heat absorber capable of generating overheated steam - Google Patents
Solar cavity-type heat absorber capable of generating overheated steam Download PDFInfo
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- CN102345858B CN102345858B CN 201110299035 CN201110299035A CN102345858B CN 102345858 B CN102345858 B CN 102345858B CN 201110299035 CN201110299035 CN 201110299035 CN 201110299035 A CN201110299035 A CN 201110299035A CN 102345858 B CN102345858 B CN 102345858B
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- superheater
- water
- cooling wall
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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
Abstract
The invention discloses a solar cavity-type heat absorber capable of generating overheated steam. The heat absorber comprises a water cooling wall and a superheater; the water cooling wall is a cavity which is provided with an opening and defined by a plurality of membrane-type pipe panels, and the water cooling wall is in vertical parallel arrangement; the superheater is positioned at the inner side of the water cooling wall; the pipe panel of the superheater is in horizontal arrangement; the inner side of the water cooling wall is provided with an 'H'-shaped water cooling connection piece which limits and fixes the superheater; and the 'H'-shaped water cooling connection piece consists of a first vertical pipe section, a horizontal pipe section and a second vertical pipe section. The problems of the transient heat match of the water cooling wall with the overheated parameters and the superheater and heat stress of a superheater pipe are solved through the cavity-type heat absorber, thus the heat absorber can adopt the parameters of the superheater, and the power station efficiency is improved.
Description
Technical field
The present invention relates to a kind of heat dump, relate in particular to a kind of solar cavity type heat absorber that produces superheated steam.
Background technology
Tower-type solar thermal power generating system requires steam parameter to remain in the scope of steam turbine permission, heat dump is comprised of three parts usually: preheating section, evaporator section and superheat section, in order to keep the relative stationary temperature of superheater outlet, the caloric receptivity ratio of superheat section and evaporator section should mate well.although with the same water of boiler of conventional fossil fuel as heat transport medium, but the working environment of solar heat absorber is but fully different, solar heat absorber all will stand the variation of 0～peak value every day, also have simultaneously the transient changing impacts such as cloud, the sunny weather condition of the design consideration of heat dump heating surface is fixed, when having black clouds to pass through, heliostat partly is blocked, cause heat dump each several part caloric receptivity uneven, for example evaporation section is because caloric receptivity reduces, the saturated vapor quantity not sufficient that produces is with the cooling superheater tube that still bears high heat load, if run into this situation, will cause vapor (steam) temperature too high, and superheater tube and the annex temperature difference thereof and thermal stress excessive, produce very soon fatigue rupture and lost efficacy.
Adopted following ways to solve this problem, but all take high pressure drop or poor efficiency as cost before, and can bear very high thermic load, increase the size of heat dump and heliostat removed etc. such as enlargement discharge; Perhaps water-cooling wall and superheater are all horizontally disposed with balance caloric receptivity, but this mode under inhomogeneous high heat load, water-cooling wall and superheater to hang layout very difficult; The heat dump that perhaps has directly only is heated to saturated vapor and does not produce superheated steam, but but greatly reduces generating efficiency.
Summary of the invention
The object of the invention is to: a kind of solar cavity type heat absorber that produces superheated steam is provided, solving the technical problem of the flux matched and superheater tube thermal stress of the thermal transient of water-cooling wall and superheater under thermal parameter, thereby can effectively solve above-mentioned problems of the prior art.
The objective of the invention is to realize by following technical proposals: a kind of solar cavity type heat absorber that produces superheated steam, comprise water-cooling wall and superheater, water-cooling wall surrounds cavity with opening by several membrane panels, water-cooling wall is layout arranged vertically, superheater is positioned at the water-cooling wall inboard, the tube panel of superheater is arranged horizontally, the water-cooling wall inboard is provided with carries out spacing and fixing " H " type Water-cooled connector to superheater, and described " H " type Water-cooled connector is comprised of the first vertical pipeline section, horizontal pipeline section and the second vertical pipeline section.
As a kind of preferred, described " H " type Water-cooled connector belongs to water-cooling wall, and the entrance of the first vertical pipeline section and the second vertical pipeline section is same water-cooling wall entrance header, exports to be same water-cooling wall outlet header.
As further preferred, the first vertical pipeline section of described " H " type Water-cooled connector, horizontal pipeline section and the second vertical pipeline section are formed in one or are welded into " H " type.
As further preferred, be provided with between superheater tube screen and " H " type Water-cooled connector and install and the expansion clearance, being provided with between adjacent two pipes of superheater tube screen can vertical movable locating piece.
As further preferred, the progression of described superheater is the 2-4 level, and adjacent two-stage superheater is provided with direct-contact desuperheater between the end, and the end of superheater passes near cavity hatch from water-cooling wall.
As further preferred, the outlet of described water-cooling wall is connected with the water-cooling wall outlet header, the water-cooling wall outlet header connects a water-cooling wall outlet connecting pipe, the water-cooling wall outlet connecting pipe connects a drum, drum connects a superheater entrance tube connector, and superheater entrance tube connector connects a superheater entrance header, and superheater entrance header connects a superheater, superheater connects a super-heater exit case, and super-heater exit case connects a superheater outlet connecting pipe.
As further preferred, also comprise down-comer, described down-comer one side is connected with drum, and opposite side is connected with water-cooling wall entrance header, and circulating pump is set on down-comer.
In the present invention, the operation principle of part-structure is as follows:
1. solar cavity type heat absorber adopts the mode that vertically arranged water-cooling wall is combined with horizontally disposed superheater, superheater is positioned at the water-cooling wall inboard, superheater can see through illumination, therefore, illumination can be radiated on superheater and water-cooling wall effectively simultaneously, thereby realize that both can increase in the same way or reduce by the caloric receptivity when illumination changes, solved like this because weather condition changes and caused water-cooling wall and superheater surface mismatch problem, superheater passes near cavity hatch from water-cooling wall, if sectionalized superheater, be provided with direct-contact desuperheater between adjacent two-stage superheater end, thereby reduce small heat absorption deviation on every one-level superheater, because superheater is horizontally disposed, make between the pipe of every one-level and the caloric receptivity between superheater tube screen at different levels can both increase in the same way or reduce,
2. adopt vertically arranged water-cooling wall, water-cooling wall weight is delivered to the top by water screen tube self;
3. the water screen tube of being told by same water-cooling wall entrance header and same water-cooling wall outlet header forms a H " the type Water-cooled connector, superheater is placed in the slit of the vertical pipeline section of " H " type Water-cooled connector first and the second vertical pipeline section formation.Because energy-flux density in the chamber is higher, if therefore hanging of superheater adopts ordinary construction spare to be easy to high temperature failure, therefore, this " H " type Water-cooled connector is owing to being the water screen tube formation that same water-cooling wall entrance header and same water-cooling wall outlet header are told, can obtain good cooling, simultaneously that superheater is placed on it, can play support, spacing and weight transmitting to superheater, solve hanging and cooling problem of horizontal superheater under high heat load, the quantity of " H " type Water-cooled connector is set according to the carrying demand of superheater;
4. " H " type water-cooled connects with superheater tube screen both sides and only reserves very little installation and expansion clearance, tube panel bottommost pipe is positioned at the slit top of " H " type Water-cooled connector, positioned by locating piece between every pipe, but unfixing, guarantee free wxpansion between every superheater tube;
5. superheater passes chamber in the panelized-tube-wall section position near the cavity hatch place, thereby avoids being subject to the direct projection of the high fluence density light at accent place, avoids the high temperature failure of superheater pipe.
Compared with prior art, beneficial effect of the present invention: the solar cavity type heat absorber that the present invention produces superheated steam has solved crosses under thermal parameter the flux matched and superheater tube thermal stress issues of the thermal transient of water-cooling wall and superheater, make heat dump can adopt the superheater parameter, improved efficiency of plant.
Description of drawings
Fig. 1 is the structural representation that the present invention produces the solar cavity type heat absorber of superheated steam;
Fig. 2 is the enlarged diagram of " H " type Water-cooled connector and water-cooling wall and superheater structural relation;
Fig. 3 is the partial enlarged drawing of Water-cooled connector in Fig. 1;
Fig. 4 is the positional structure schematic diagram of superheater tube screen and " H " type Water-cooled connector.
In figure, water-cooling wall entrance header-1, water-cooling wall-2, water-cooling wall outlet header-3, water-cooling wall outlet connecting pipe-4, drum-5, superheater entrance tube connector-6, superheater entrance header-7, superheater-8, direct-contact desuperheater-9, super-heater exit case-10, superheater outlet connecting pipe-11, down-comer-15, circulating pump-16, tube panel passes water-cooling wall position-18, " H " type Water-cooled connector-20, tube panel lower tube-21, the vertical pipeline section-201 in locating piece-22, the first, the second vertical pipeline section-202, horizontal pipeline section-203, gap-204.
The specific embodiment
The present invention is further illustrated below in conjunction with specific embodiments and the drawings.
Disclosed all features in this specification, or the step in disclosed all methods or process, except the speciality and/or step of mutual repulsion, all can make up by any way, unless special narration all can be replaced by other equivalences or the alternative features with similar purpose, namely, unless special narration, an embodiment in a series of equivalences of each feature or similar characteristics.
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, a kind of solar cavity type heat absorber that produces superheated steam comprises water-cooling wall 2, superheater 8, and water-cooling wall 2 surrounds cavity with opening by several membrane panels.described water-cooling wall 2 outlets connect water-cooling wall outlet header 3, water-cooling wall outlet header 3 connects water-cooling wall outlet connecting pipe 4, water-cooling wall outlet connecting pipe 4 connects drum 5, drum 5 connects superheater entrance tube connector 6, superheater entrance tube connector 6 connects superheater entrance header 7, superheater entrance header 7 connects superheater 8, superheater 8 connects super-heater exit case 10, super-heater exit case 10 connects superheater outlet connecting pipe 11, down-comer 15 1 sides are connected with drum 5, opposite side is connected with water-cooling wall entrance header 1, on described down-comer 15, circulating pump 16 can be set as required.Water-cooling wall 2 can adopt the mode of Natural Circulation or forced circulation, whether circulating pump 16 is set on down-comer 15 preferably decides according to the design of design parameter.
Described water-cooling wall 2 is film mode tube screen layout arranged vertically, and water-cooling wall 2 can determine whether that needs are divided into preheating section and evaporator section according to the entrance fluid properties, and the weight of water-cooling wall 2 self is delivered to the top by the water-cooling wall pipe.
Superheater 8 horizontally arranges for tube panel, and superheater 8 leaves the expansion clearance between the inboard of water-cooling wall 2 and superheater 8 and water-cooling wall 2.Superheater can see through illumination, therefore, illumination can be radiated on superheater and water-cooling wall effectively simultaneously, thereby realize that both are when illumination changes, between water-cooling wall 2 and superheater 8, caloric receptivity can increase in the same way or reduce, and has solved like this because weather condition changes to cause water-cooling wall and superheater surface mismatch problem.。the progression of described superheater 8 can be set to 1 grade or 2-4 level, its actual progression arranges according to the design parameter demand, if sectionalized superheater, be provided with direct-contact desuperheater between adjacent two-stage superheater end, thereby reduce small heat absorption deviation on every one-level superheater, because superheater is horizontally disposed, make between the pipe of every one-level and the caloric receptivity between superheater tube screen at different levels can both increase in the same way or reduce, in the present embodiment, the progression of superheater is 2 grades, the end of superheater 8 passes near cavity hatch from water-cooling wall 2, namely, as shown in fig. 1, superheater 8 passes water-cooling wall position 18 from tube panel and passes, it is the gap locations that are positioned near between the adjacent two water-cooling wall pipes of cavity hatch place certain distance that described tube panel passes water-cooling wall position 18.It is direct projection for fear of being subject to accent place high fluence density light that superheater 8 does not pass from cavity hatch.Be provided with direct-contact desuperheater 9 between these adjacent two superheater 8 ends, direct-contact desuperheater 9 is in order to regulate the heat absorption deviation of superheater.
The structure of " H " type Water-cooled connector 20 as shown in Figure 2, described " H " type Water-cooled connector 20 is formed in one or is welded into " H " type, namely directly integral body is directly made " H " shape Forging, also can be welded into two vertical horizontal " H " shapes by the first vertical pipeline section-201, horizontal pipeline section-203 and the second vertical pipeline section-202.In the present embodiment, " H " type Water-cooled connector 20 is by three sections welding fabrications.The entrance of the first vertical pipeline section 201 and the second vertical pipeline section 202 is same water-cooling wall entrance header 1, outlet is same water-cooling wall outlet header 3, and superheater 8 is placed in the slit of the vertical pipeline section 201 of " H " type Water-cooled connector 20 first and the second vertical pipeline section 202 formation.Be provided with gap 204 between superheater 8 and " H " type Water-cooled connector 20, gap 204 is " H " type Water-cooled connector 20 and a very little installation of superheater 8 tube panel both sides reservations and the space of expansion, the tube panel lower tube 21 of superheater 8 is located immediately at the slit top that the first vertical pipeline section 201 in " H " type Water-cooled connector 20 and the second vertical pipeline section 202 form, be provided with activity orientation piece 22 between adjacent two superheater pipes, locating piece 22 plays the role of positioning, and can guarantee free wxpansion between every superheater pipe.
Because energy-flux density in the chamber is higher, if therefore hanging of superheater adopts ordinary construction spare to be easy to high temperature failure, therefore, this " H " type Water-cooled connector is owing to being the water screen tube formation that same water-cooling wall entrance header and same water-cooling wall outlet header are told, can obtain good cooling, superheater is placed on it, can play support, spacing and weight transmitting to superheater, solve hanging and cooling problem of horizontal superheater under high heat load, the quantity of " H " type Water-cooled connector is set according to the carrying demand of superheater.In the present embodiment, described superheater tube is lived by H type conduit saddle, and its top is also held with similar structures, to play the effect of better hanging.
In the present invention, the operation principle of part-structure is:
1. the water-cooling wall of formation chamber and horizontally disposed superheater 8 recept the caloric when illumination changes and increase in the same way or reduce, the caloric receptivity of superheaters at different levels is also increase in the same way or reduce, layout can be alleviated water-cooling wall and the matching problem of superheater surface when Changes in weather greatly like this, and the temperature difference in the caloric receptivity deviation of the different inter-stages of superheater and same screen also can reduce greatly simultaneously;
2. the weight of vertically arranged water-cooling wall self is passed to the erecting by overhang that is not heated by the water-cooling wall pipe;
3. horizontally disposed superheater adopts " H " type Water-cooled connector to be fixed with spacing, " H " type Water-cooled connector not only to superheater play spacing, hang the effect with weight transmitting, also solved the cooling problem of superheater erecting by overhang under the high heat load.
4. the weight of superheater 8 is delivered on the erecting by overhang of water-cooling wall by " H " type water-cooled connection 20.
Heat dump of the present invention has solved crosses under thermal parameter the flux matched and superheater tube thermal stress issues of the thermal transient of water-cooling wall and superheater, makes the heat dump can to adopt the superheater parameter, has improved efficiency of plant.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. solar cavity type heat absorber that produces superheated steam, comprise water-cooling wall (2) and superheater (8), water-cooling wall (2) surrounds cavity with opening by several membrane panels, it is characterized in that: water-cooling wall (2) is layout arranged vertically, superheater (8) is positioned at water-cooling wall (2) inboard, the tube panel of superheater (8) is arranged horizontally, water-cooling wall (2) inboard is provided with carries out spacing and fixing " H " type Water-cooled connector (20) to superheater (8), described " H " type Water-cooled connector (20) is by the first vertical pipeline section (201), horizontal pipeline section (203) and the second vertical pipeline section (202) form.
2. the solar cavity type heat absorber of generation superheated steam as claimed in claim 1, it is characterized in that: described " H " type Water-cooled connector (20) belongs to water-cooling wall (2), the entrance of the first vertical pipeline section (201) and the second vertical pipeline section (202) is same water-cooling wall entrance header (1), exports to be same water-cooling wall outlet header (3).
3. the solar cavity type heat absorber of generation superheated steam as claimed in claim 2, it is characterized in that: the first vertical pipeline section (201) of described " H " type Water-cooled connector (20), horizontal pipeline section (203) and the second vertical pipeline section (202) are formed in one or are welded into " H " type.
4. as the solar cavity type heat absorber of the described generation superheated steam of arbitrary claim in claim 1 or 3, it is characterized in that: be provided with between superheater (8) tube panel and " H " type Water-cooled connector (20) and install and expansion clearance (204), being provided with between adjacent two pipes of superheater (8) tube panel can vertical movable locating piece (22).
5. the solar cavity type heat absorber of generation superheated steam as claimed in claim 4, it is characterized in that: the progression of described superheater (8) is the 2-4 level, adjacent two-stage superheater (8) is provided with direct-contact desuperheater (9) between the end, and the end of superheater (8) passes near cavity hatch from water-cooling wall (2).
6. the solar cavity type heat absorber of generation superheated steam as claimed in claim 5, it is characterized in that: the outlet of described water-cooling wall (2) is connected with water-cooling wall outlet header (3), water-cooling wall outlet header (3) connects a water-cooling wall outlet connecting pipe (4), water-cooling wall outlet connecting pipe (4) connects a drum (5), drum (5) connects a superheater entrance tube connector (6), superheater entrance tube connector (6) connects a superheater entrance header (7), superheater entrance header (7) connects a superheater (8), superheater (8) connects a super-heater exit case (10), super-heater exit case (10) connects a superheater outlet connecting pipe (11).
7. the solar cavity type heat absorber of generation superheated steam as claimed in claim 6, it is characterized in that: also comprise down-comer (15), described down-comer (15) one sides are connected with drum (5), opposite side is connected with water-cooling wall entrance header (1), and circulating pump (16) is set on down-comer (15).
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| CN 201110299035 CN102345858B (en) | 2011-09-28 | 2011-09-28 | Solar cavity-type heat absorber capable of generating overheated steam |
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| CN 201110299035 CN102345858B (en) | 2011-09-28 | 2011-09-28 | Solar cavity-type heat absorber capable of generating overheated steam |
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| EP2706307A1 (en) * | 2012-09-10 | 2014-03-12 | Wieghardt, Kai | Thermal solar tower power plant |
| CN103047776B (en) * | 2012-10-22 | 2014-07-16 | 张栋 | Novel efficient receiver for solar tower-type thermal power generation |
| CN103062743B (en) * | 2013-01-09 | 2015-07-29 | 北京世纪源博科技股份有限公司 | A kind of cavity type natural recirculating type solar energy wet steamer |
| CN104033875B (en) * | 2014-06-25 | 2015-07-22 | 常州德峰节能电力工程技术有限公司 | Novel waste heat boiler |
| CN104101112B (en) * | 2014-07-11 | 2015-11-18 | 上海锅炉厂有限公司 | A kind of solar energy heating receiver |
| 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 |
| CN108167816B (en) * | 2018-02-24 | 2024-01-26 | 济南锅炉集团有限公司 | Water-cooling clamping type anti-shaking U-shaped screen type superheater |
| CN108489122B (en) * | 2018-05-23 | 2023-06-02 | 东方电气集团东方锅炉股份有限公司 | Tower type solar molten salt heat absorber heat preservation structure |
| CN110440458B (en) * | 2019-08-01 | 2021-01-12 | 浙江中控太阳能技术有限公司 | Heat absorber tube panel assembly for tower type solar thermal power generation |
| CN112815294B (en) * | 2021-02-02 | 2023-04-25 | 哈尔滨锅炉厂有限责任公司 | Novel boiler membrane type wall tube panel space behavior size positioning tool and method |
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| CN100552320C (en) * | 2008-01-14 | 2009-10-21 | 东南大学 | Special-shaped modular type hollow space solar energy high-temperature receiver |
| CN101387393A (en) * | 2008-11-01 | 2009-03-18 | 陈应天 | Solar steam generator |
| CN101504331B (en) * | 2009-02-27 | 2011-01-05 | 西安交通大学 | Simulating device for solar cavity type heat absorber |
| ES2365286B1 (en) * | 2010-03-16 | 2012-06-07 | Abengoa Solar New Technologies S.A. | ECONOMIZER IN SOLAR PLANT TOWER AND METHOD OF OPERATION OF SUCH PLANT. |
| CN101956968B (en) * | 2010-09-27 | 2013-03-13 | 绍兴文理学院 | Tower-type solar natural circulation receiver |
| CN102146899B (en) * | 2011-01-30 | 2012-12-12 | 杭州锅炉集团股份有限公司 | Multi-tower binary-working-medium solar high-temperature heat power generation system |
| CN202267053U (en) * | 2011-09-28 | 2012-06-06 | 东方电气集团东方锅炉股份有限公司 | Solar energy cavity heat absorber capable of generating superheated steam |
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