CN104501425A - Solar thermal power generation control circulating heat absorber with overheater start protecting function - Google Patents
Solar thermal power generation control circulating heat absorber with overheater start protecting function Download PDFInfo
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- CN104501425A CN104501425A CN201410804487.9A CN201410804487A CN104501425A CN 104501425 A CN104501425 A CN 104501425A CN 201410804487 A CN201410804487 A CN 201410804487A CN 104501425 A CN104501425 A CN 104501425A
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- water
- cooling wall
- superheater
- steam
- drum
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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
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Abstract
Disclosed is a solar thermal power generation control circulating heat absorber with an overheater start protecting function. A water cooling wall lower connecting box (2) is mounted at the bottom of the heat absorber, one side of the water cooling wall lower connecting box (2) is connected with a descending pipe (13) while the other side of the same is connected with a water cooling wall (3), the top of the water cooling wall (3) is connected with a steam pocket (4), the descending pipe (13) is positioned behind the water cooling wall (3) and parallel to the same, the upper end of the descending pipe (13) is connected with the steam pocket (4), a boiler water circulating pump (14) is mounted on the descending pipe (13), the steam pocket (4) is positioned at the top of the heat absorber, the water cooling wall lower connecting box (2), the water cooling wall (3), the steam pocket (4), the descending pipe (13) and the boiler water circulating pump form a closed loop, and an overheater (5) is parallel to the water cooling wall (3) and positioned in front of the same. When the heat absorber is started at an early stage or a steam turbine sheds load, the overheater (5) leads in steam of an auxiliary boiler or a public steam system for cooling through an auxiliary steam leading-in pipeline connected with an inlet of the overheater.
Description
Technical field
The present invention relates to a kind of solar energy thermal-power-generating heat-absorption device.
Background technology
Solar energy thermal-power-generating heat-absorption device is in initial start stage, the quantity of steam produced due to water wall surface is not enough to cool superheater surface, superheater surface dry combustion method may be caused, the fault of heated surface bundle overtemperature tube burst, which limits the toggle speed of solar energy thermal-power-generating heat-absorption device.Superheater surface outlet vapor quality can not meet steam turbine admission requirement simultaneously, can not send into steam turbine, can only drain as blowdown, cause the loss of a large amount of working medium and heat.
Conventional solar energy thermal-power-generating heat-absorption device, when initial start stage or load dump, in order to protect superheater surface, usually adopting to water cooling and adopting high-grade metal material to stand the mode of dry combustion method.For feedwater cooling superheater, after evaporation of feeding water in superheater bank, easily by the Impurity deposition that carries on tube wall, cause the phenomenon of salification fouling, may cause restraining overtemperature tube burst.The solid particulate matter of superheater coil tubes is brought in feedwater simultaneously into, when heat dump normally runs, may be brought into steam turbine by steam, cause and cause solid particulate matter to corrode to turbine blade and flow passage component.Further, superheater outlet steam, owing to not reaching steam turbine admission requirement, so can only drain as blowdown, causes the loss of a large amount of working medium and heat.So conventional solar energy thermal-power-generating heat-absorption device is difficult to the requirement effectively meeting the security of solar energy thermal-power-generating heat-absorption device and economy.
The existing patent hotspot about solar energy thermal-power-generating heat-absorption device focus mostly on the overtemperature preventing water wall surface under high heat flux, reduce heatsink loss and by methods such as absorber coatings in the raising of solar radiation energy absorption efficiency; for heat dump starting protection and working medium and the recycling of heat when starting, there is not yet relevant report.
Summary of the invention
The object of the invention is to overcome existing solar energy thermal-power-generating heat-absorption device superheater surface when initial start stage or load dump and there is the hidden danger of overtemperature tube burst; and a large amount of losses of working medium and heat; heat dump toggle speed is slow; the problem that less economical, security can not be guaranteed, proposes a kind of solar energy thermal-power-generating controlled circulation heat dump with superheater starting protection.
For realizing described goal of the invention, the technical solution used in the present invention is as follows:
A kind of solar energy thermal-power-generating controlled circulation heat dump with superheater starting protection comprises: water-cooling wall lower collecting box, water-cooling wall, down-comer, pot water-circulating pump, drum and superheater.
Described water-cooling wall lower collecting box is arranged on the bottom of heat dump, and the side of water-cooling wall lower collecting box connects down-comer, and opposite side connects water-cooling wall.
Described water-cooling wall is arranged vertically on the middle part of heat dump.The top of water-cooling wall connects drum, and bottom connects water-cooling wall lower collecting box.The heating surface of water-cooling wall has multiple parallel pipeline according to certain pitch arrangement, the tube bank of composition water wall surface.
Described down-comer is arranged vertically on the middle part of heat dump, parallel with water-cooling wall, is positioned at after water-cooling wall.Down-comer does not receive solar radiation.The upper end of down-comer connects drum, and lower end connects water-cooling wall lower collecting box, down-comer is provided with a pot water-circulating pump.
Described drum is positioned at the top of heat dump.The side, bottom of drum connects down-comer, and opposite side connects water-cooling wall.Drum top has steam fairlead to connect superheater, and side has feedwater piping to connect the feed pump of solar energy thermal-power-generating therrmodynamic system.
Described superheater is arranged vertically on the middle part of heat dump, parallel with water-cooling wall, is positioned at before water-cooling wall.First solar radiation projects on superheater, then from the interstitial transmissive of superheater to water-cooling wall.The import of superheater connects the auxiliary steam introducing pipeline of solar heat power generation system respectively, and one end that auxiliary steam introduces pipeline connects superheater import, and the other end connects power station donkey boiler or power station common steam pipeline.The outlet of superheater connects main steam line, this main steam line is divided into two-way, a-road-through is to steam turbine, the saturated vapor that drum is drawn is heated to be superheated steam, deliver to Turbo-generator Set generating, an other road is bypass duct, and bypass duct one end connects superheater outlet, one end connects the condenser of steam turbine, and superheater outlet steam is introduced condenser.Bypass duct is provided with spray desuperheating device and decompressor successively along vapor flow direction, sends after steam temperature reducing and pressure reducing into condenser, prevent the high temperature and high pressure steam of superheater outlet from damaging condenser.
The effect of superheater receives solar radiation heat by water-cooling wall and superheater surface, heats the working medium in water-cooling wall and superheater surface, produce the steam of nominal parameter, send into Turbo-generator Set generating.
Water-cooling wall lower collecting box, water-cooling wall, down-comer, pot water-circulating pump and drum form a closed circuit.The feedwater come from Power Plant Thermal System feed pump enters drum to drum moisturizing.Water-cooling wall lower collecting box and down-comer do not receive solar radiation heat, and drum and water-cooling wall lower collecting box play the effect of header.Water-cooling wall plays the effect of heating surface.Water enters down-comer from drum, enters water-cooling wall lower collecting box, then enter water-cooling wall under the effect of pot water-circulating pump.Constantly absorb heat in water-cooling wall flow process from the bottom to top, become saturation water gradually from unsaturated water, form steam water interface after the evaporation of saturation water part, steam water interface upwards flows into drum, completes an endothermic process.In this loop, the principle of working medium controlled circulation is that pot water-circulating pump on down-comer provides circulation motive force, overcomes flow resistance.Steam water interface carries out carbonated drink separation after water-cooling wall upwards flows feeding drum.Isolated steam enters superheater, and isolated water is reintroduced back to water-cooling wall circulation heat absorption again by down-comer.
Carbonated drink mixture carries out carbonated drink separation in drum, isolated water reenters down-comer and carries out circulating-heating, isolated steam enters superheater to be continued to be heated, introduce Turbo-generator Set generating after becoming superheated steam, or carried out the recovery of working medium and heat by the condenser introducing steam turbine after the spray desuperheating device on bypass duct and decompressor pressure and temperature reducing.
When heat dump normally runs, superheater outlet steam is introduced Turbo-generator Set generating by the main steam line of superheater outlet.
In heat dump initial start stage, it is larger that superheater accepts solar radiation heat, and water-cooling wall due to working medium initial temperature low, the carbonated drink mixture produced is few, in drum, isolated quantity of steam is little, cause the quantity of steam entering superheater few, be not enough to cool superheater, superheater over temperature may be caused to damage.At this moment solar heat power generation system donkey boiler generation steam or common steam are introduced pipeline from auxiliary steam and introduce superheater, superheater is cooled, then through bypass duct, steam is introduced the condenser of steam turbine from superheater outlet, carry out the recovery of working medium and heat.So just achieve the object at heat dump initial start stage protection superheater.
The present invention has following characteristics:
1, adopt the steam of donkey boiler to protect superheater surface in initial start stage, prevent superheater surface overtemperature.The generation of the phenomenons such as the tube bank salification avoiding utilization feedwater cooling superheater surface to cause and the erosion of steam turbine solid particulate matter.
2, adopt bypass duct initial start stage to be protected the steam of superheater surface to introduce condenser, working medium and heat are reclaimed.
3, adopt bypass duct when load dump, superheater surface outlet vapor is introduced condenser, working medium and heat are reclaimed.
4, on bypass duct, install the steam over-temp and over-pressure that reducing-and-cooling plant prevents from entering condenser additional.
Accompanying drawing explanation
Fig. 1 structure composition of the present invention schematic diagram, in figure: 1 solar energy thermal-power-generating heat-absorption device, 2 water-cooling wall lower collecting box, 3 water-cooling walls, 4 drums, 5 superheaters, 6 spray desuperheating devices, 7 decompressors, 8 condensers, 9 condensate pumps, 10 oxygen-eliminating devices, 11 feed pumps, 12 feedwater pipings, 13 down-comers, 14 pots of water-circulating pumps;
Fig. 2 heat dump steam flow chart.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the solar energy thermal-power-generating controlled circulation heat dump 1 of band superheater starting protection of the present invention comprises: water-cooling wall lower collecting box 2, water-cooling wall 3, down-comer 13, pot water-circulating pump 14, drum 4 and superheater 5.
Described water-cooling wall lower collecting box 2 is arranged on the bottom of heat dump, and the side of water-cooling wall lower collecting box 2 connects down-comer 13, and opposite side connects water-cooling wall 3.
Described water-cooling wall 3 is arranged vertically on the middle part of heat dump.The top of water-cooling wall 3 connects drum 4, and bottom connects water-cooling wall lower collecting box 2.The heating surface of water-cooling wall 3 has multiple parallel pipeline according to certain pitch arrangement, the tube bank of composition water wall surface.
Described down-comer 13 is arranged vertically on the middle part of heat dump, parallel with water-cooling wall 3, is positioned at after water-cooling wall 3.Down-comer 13 does not receive solar radiation.The upper end of down-comer 13 connects drum 4, and lower end connects water-cooling wall lower collecting box 2.
Described pot water-circulating pump 14 is arranged on down-comer.
Described drum 4 is positioned at the top of heat dump.The side, bottom of drum 4 connects down-comer 13, and opposite side connects water-cooling wall 3.The top of drum 4 has steam fairlead to connect superheater 5, and side has feedwater piping 12 to connect the feed pump 11 of Power Plant Thermal System.
Described superheater 5 is arranged vertically on the middle part of heat dump, parallel with water-cooling wall 3, is positioned at before water-cooling wall 3.First solar radiation projects on superheater 5, then from the interstitial transmissive of superheater 5 to water-cooling wall 3.The import of superheater 5 connects the auxiliary steam introducing pipeline of drum 4 and solar heat power generation system respectively, and described auxiliary steam introduces the import of one end connection superheater 5 of pipeline, and the other end connects power station donkey boiler or power station common steam pipeline.The outlet of superheater 5 connects main steam line, and this main steam line is divided into two-way, and a-road-through is to steam turbine, the saturated vapor that drum 4 is drawn is heated to be superheated steam, and deliver to Turbo-generator Set generating, an other road is bypass duct, lead to condenser, superheater outlet steam is introduced condenser.Bypass duct is provided with spray desuperheating device 6 and decompressor 7 successively along vapor flow direction.
The main heating surface of heat dump is water-cooling wall 3 and superheater 5.Described water-cooling wall lower collecting box 2, water-cooling wall 3, drum 4, down-comer 13 and pot water-circulating pump 14 form a closed-loop path.
The course of work of the present invention is as follows:
Condensate water in the condenser 8 of solar electrical energy generation therrmodynamic system enters oxygen-eliminating device 10 after being boosted by condensate pump 9, becomes feedwater, boost under the effect of feed pump 11 after deoxygenation, sends into heat dump 1.In heat dump 1 through preheating, evaporation, overheated after become from unsaturated water the superheated steam meeting the requirement of steam turbine steam inlet condition, send into steam turbine acting, drive electrical generators generate electricity.Steam after acting enters condenser 8 and condenses, and becomes condensate water.When heat dump of the present invention normally runs, isolated for drum 4 saturated vapor is heated as the superheated steam of certain parameter by superheater 5 further, sends into steam turbine acting.In heat dump initial start stage, drum 4 does not have enough saturated vapors to enter superheater, but superheater 5 still can absorb solar radiation heat, may cause superheater over temperature.Now introduce steam from power station donkey boiler or common steam system, enter superheater 5, cooling protection is carried out to superheater.Superheater 5 outlet vapor, by bypass duct, after spray desuperheating device 6 and decompressor 7, enters condenser 8, carries out the recovery of working medium and heat.When load dump, the steam of being drawn by superheater 5, by the bypass duct of spray desuperheating device 6 and decompressor 7, introduces the recovery that condenser 8 carries out working medium and heat.
As shown in Figure 2, the specific works process of heat dump 1 is: drum 4 is sent in the feedwater carrying out condenser 8, unsaturated water is become after mixing, under the effect of pot water-circulating pump 14, after entering water-cooling wall lower collecting box 2 by down-comer 13 with saturation water in drum 4, enter the water-cooled wall of water-cooling wall 3 respectively, absorb solar radiation heat, produce steam, single-phase water becomes steam water interface, steam water interface is introduced into drum 4 through the outlet of water-cooling wall 3, completes an endothermic process.Steam water interface carries out carbonated drink separation in drum 4, isolated saturated vapor is sent into superheater 5 by the steam fairlead on drum top and is continued heating, after the feedwater that isolated saturation water and feed pump come mixes, again enter water-cooling wall lower collecting box 2 by down-comer 13, carry out next circulation heat absorption.
In heat dump initial start stage, drum 4 does not have enough saturated vapors to enter superheater 5, but superheater 5 still can absorb solar radiation heat, may cause superheater over temperature.Utilize donkey boiler or common steam system to introduce steam, enter superheater 5 by auxiliary steam pipeline, superheater 5 is cooled.The steam that superheater outlet is discharged by after Desuperheating device 6 and decompressor 7 through bypass duct, enters condenser 8, carries out the recovery of working medium and heat.When load dump, steam superheater 5 can drawn equally introduces by bypass duct the recovery that condenser 8 carries out working medium and heat.
Claims (4)
1. the solar energy thermal-power-generating controlled circulation heat dump with superheater starting protection, it is characterized in that, described heat dump comprises: water-cooling wall lower collecting box (2), water-cooling wall (3), drum (4), superheater (5) and pot water-circulating pump (14);
Described water-cooling wall lower collecting box (2) is arranged on the bottom of heat dump, and the side of water-cooling wall lower collecting box (2) connects down-comer (13), and opposite side connects water-cooling wall (3);
Described water-cooling wall (3) is arranged vertically on the middle part of heat dump; The top of water-cooling wall (3) connects drum (4), and bottom connects water-cooling wall lower collecting box (2);
Described down-comer (13) is arranged vertically on the middle part of heat dump, is positioned at after water-cooling wall (3), parallel with water-cooling wall (3); The upper end of down-comer (13) connects drum (4), and lower end connects water-cooling wall lower collecting box (2), down-comer is furnished with a pot water-circulating pump (14);
Described drum (4) is positioned at the top of heat dump; The side, bottom of drum (4) connects down-comer (13), and opposite side connects water-cooling wall (3);
Described water-cooling wall lower collecting box (2), water-cooling wall (3), drum (4), down-comer (13) and pot water-circulating pump form a closed-loop path;
Described superheater (5) is arranged vertically on the middle part of heat dump, parallel with water-cooling wall (3), is positioned at before water-cooling wall (3).
2. the solar energy thermal-power-generating controlled circulation heat dump of band superheater starting protection according to claim 1, it is characterized in that, the top of described drum (4) has steam fairlead to connect superheater (5), and side has feedwater piping (12) to connect the feed pump (11) of solar energy thermal-power-generating therrmodynamic system; The import of described superheater (5) connects the auxiliary steam introducing pipeline of drum (4) and solar heat power generation system respectively, and the other end that described auxiliary steam introduces pipeline connects solar heat power generation system donkey boiler or common steam pipeline; The outlet of superheater (5) connects main steam line, this main steam line is divided into two-way, a-road-through is to steam turbine, the saturated vapor that drum (4) is drawn is heated to be superheated steam, deliver to Turbo-generator Set generating, an other road is bypass duct, leads to condenser, and the steam of being discharged by superheater outlet introduces condenser; Bypass duct is provided with spray desuperheating device (6) and decompressor (7) successively along vapor flow direction.
3. the solar energy thermal-power-generating controlled circulation heat dump of band superheater starting protection according to claim 2; when it is characterized in that heat dump initial start stage or load dump, the steam that superheater (5) introduces the generation of pipeline introducing donkey boiler by described auxiliary steam cools.
4. the solar energy thermal-power-generating controlled circulation heat dump of band superheater starting protection according to claim 1, is characterized in that, the heating surface of described water-cooling wall (3) is furnished with multiple parallel pipeline, the tube bank of composition water wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410804487.9A CN104501425A (en) | 2014-12-19 | 2014-12-19 | Solar thermal power generation control circulating heat absorber with overheater start protecting function |
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| CN201410804487.9A CN104501425A (en) | 2014-12-19 | 2014-12-19 | Solar thermal power generation control circulating heat absorber with overheater start protecting function |
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| CN104501425A true CN104501425A (en) | 2015-04-08 |
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| CN201410804487.9A Pending CN104501425A (en) | 2014-12-19 | 2014-12-19 | Solar thermal power generation control circulating heat absorber with overheater start protecting function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036303A (en) * | 2017-04-21 | 2017-08-11 | 华电电力科学研究院 | Tower type solar receiver with protection system |
| CN107893987A (en) * | 2017-12-28 | 2018-04-10 | 西安富凯能源科技有限责任公司 | The hydrodynamic effective utilization system of natural circulation boiler |
| CN110332512A (en) * | 2019-08-05 | 2019-10-15 | 杭州锅炉集团股份有限公司 | A kind of water quality heat absorber system applied to concentrating solar with superheat section |
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| 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 |
| CN204358972U (en) * | 2014-12-19 | 2015-05-27 | 中国科学院电工研究所 | With the solar energy thermal-power-generating controlled circulation heat dump of superheater starting protection |
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2014
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Patent Citations (3)
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| CN1045168A (en) * | 1989-01-24 | 1990-09-05 | 阿尔斯特罗姆公司 | Reheat steam temperature control system and method in the CFBB |
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| CN204358972U (en) * | 2014-12-19 | 2015-05-27 | 中国科学院电工研究所 | With the solar energy thermal-power-generating controlled circulation heat dump of superheater starting protection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036303A (en) * | 2017-04-21 | 2017-08-11 | 华电电力科学研究院 | Tower type solar receiver with protection system |
| CN107893987A (en) * | 2017-12-28 | 2018-04-10 | 西安富凯能源科技有限责任公司 | The hydrodynamic effective utilization system of natural circulation boiler |
| CN110332512A (en) * | 2019-08-05 | 2019-10-15 | 杭州锅炉集团股份有限公司 | A kind of water quality heat absorber system applied to concentrating solar with superheat section |
| CN110332512B (en) * | 2019-08-05 | 2024-01-16 | 西子清洁能源装备制造股份有限公司 | Water quality heat absorber system applied to concentrating solar band superheating section |
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Application publication date: 20150408 |