CN102852742A - Tower type solar thermal power generation system for heat absorber of vacuum heat absorption pipes - Google Patents

Tower type solar thermal power generation system for heat absorber of vacuum heat absorption pipes Download PDF

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Publication number
CN102852742A
CN102852742A CN2012103165806A CN201210316580A CN102852742A CN 102852742 A CN102852742 A CN 102852742A CN 2012103165806 A CN2012103165806 A CN 2012103165806A CN 201210316580 A CN201210316580 A CN 201210316580A CN 102852742 A CN102852742 A CN 102852742A
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steam
storage tank
water
vacuum heat
heat
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CN102852742B (en
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白凤武
王志峰
雷东强
李鑫
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Institute of Electrical Engineering of CAS
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Institute of Electrical Engineering of CAS
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/46Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

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Abstract

The invention discloses a tower type solar thermal power generation system for a heat absorber of vacuum heat absorption pipes, which is characterized in that water/steam is taken a heat transfer fluid, and fusion salt is taken as a heat storage medium. The tower type solar thermal power generation system comprises a heliostat (1), a support tower (2), a heat absorber (3), a steam turbine (4), a generator (5), a deaerator (6), a condenser (7), a water feed pump (8), a high-temperature fusion salt storage tank (9), a low-temperature fusion salt storage tank (10), a water/steam-fusion salt heat exchanger (11), a fusion salt steam generator (12) and a control valve (13). The heat absorber (3) is formed by connecting the vacuum heat absorption pipes (18) in series and in parallel. According to the invention, the heliostat is arranged in a fan-shaped manner, a rectangular manner or a circumferential manner, the high-temperature and high-pressure overheating steam is obtained, and the solar thermal power generation system is suitable for a large installed capacity tower type solar thermal power generation station.

Description

The tower-type solar thermal power generating system of vacuum heat absorbing pipe heat absorber
Technical field
The present invention relates to a kind of tower-type solar thermal power generating system, particularly utilize vacuum heat absorbing pipe to be the tower-type solar thermal power generating system of heat absorber.
Background technique
Solar energy is inexhaustible renewable energy sources, and the today of reduce year by year at fossil fuel, the international energy situation is increasingly severe, development and use solar energy is one of important channel of realizing energy supply diversification, assurance energy security.Tower type solar energy thermal power generation device basic principle is to utilize numerous heliostats, solar radiation is reflexed on the solar receiver that places on the tower, produces superheated vapor or high temperature air by heating working medium, drives generator set, produces electric energy.The high temperature solar heat absorber is the core component of tower type thermal generation system.The external technique that centers on has carried out many research, mainly concentrates on the U.S., Spain, Germany, Israel, Australia, Korea S etc.The generating working medium that wherein adopts the solar heat power generation system of Rankine cycle is water vapor, to assemble the high fluence density solar energy that obtains through heliostat field and be converted into the high-quality water vapor that satisfies steam turbine operation, common technological approaches has two kinds of direct mode and indirect modes.Direct mode refers to solar energy collecting is obtained high-quality steam to water/steam heat absorber, indirect mode refers to solar energy collecting to the heat absorber of non-device of working medium, such as molten salt thermal absorber, air heat-absorbing device, sodium heat absorber, oily heat absorber etc., obtain high-quality steam through heat-exchange apparatus again.
Adopting water/steam is that the solar energy thermal-power-generating station of working medium need not the second heat conversion, has the simple and efficient of system than advantages of higher, is that one of technical approach that develops is all paid attention in countries in the world.European patent EP 2428999A1 discloses a kind of solar heat power generation system that utilizes natural circulation mode to obtain saturated vapour.US Patent No. 2008078378-A1 discloses the water that a kind of steam generator and steam superheater separately be heated/steam heat absorber, wherein to have adopted volute be heat absorption tube to superheater, steam superheater is arranged in the lower zone of optically focused radiant emittance of input, and steam generator is arranged in the higher zone of optically focused radiant emittance of input.Patent WO20110303331A2 discloses a kind of tower-type solar thermal power generating system, its characteristics are for adopting water/steam heat absorber and molten salt thermal absorber, steam generator and the steam superheater of water/steam heat absorber are arranged apart, steam generator is arranged in cavity in besieged city, outside of heat absorber, arrange steam superheater in the chamber to reduce the thermal loss of steam superheating process, molten salt thermal absorber is arranged in ground.Heliostat field is circumference, the solar radiation that the part heliostat is assembled reflects again by lower trans secondary reflection face and assembles to the molten salt thermal absorber that is arranged in ground, the part heliostat can be assembled solar radiation to steam superheater, and the part heliostat can be assembled solar radiation to steam generator.
Summary of the invention
The objective of the invention is to overcome that existing water/steam heat absorber thermal efficiency is low, high to the focusing system required precision, the deficiency of poor stability, propose a kind of tower-type solar thermal power generating system take vacuum heat absorbing pipe as heat absorber.
Tower-type solar thermal power generating system of the present invention includes capital equipment and the subsidiary engine equipment such as heliostat, support tower, heat absorber, regenerative system, steam turbine and generator take water, saturated vapour and superheated vapor as thermal fluid, such as pump etc.The present invention is take water, saturated vapour and superheated vapor as thermal fluid, and the high temperature and high pressure steam of acquisition can be directly used in steam turbine power generation, has avoided the use of intermediate heat transfer, has improved the thermal conversion efficiency of system.
Described heliostat is the optical block at tower type solar energy thermal power generation station.Heliostat is take support tower as with reference to being arranged in ground, and the arrangement mode of heliostat can fan-shapedly be arranged, rectangular arrangement or circumference, with assembling to the heat absorber surface the solar energy highly effective rate.
Described support tower is used for supporting heat absorber and pipe-line system thereof, usually is made by steel structure or reinforced concrete.For the heliostat field of fan-shaped layout, support tower is arranged in a side center of fan-shaped heliostat field, is arranged in the center of heliostat field for the heliostat field support tower of circumference type layout, and its arrangement principle is the highest for the annual light gathering efficiency of realizing heliostat field.
Described heat absorber is comprised of many vacuum heat absorbing pipes.Leave hole between the many vacuum heat absorbing pipes, on absorption sun optically focused energy flux of radiation direction, arrange that at least two vacuum pumping heat absorption tubes are to guarantee the abundant absorption of solar energy.Adopt between many vacuum heat absorbing pipes to be welded to connect, can be for being connected in series or being connected in parallel according to the flow direction of thermal fluid.
Described vacuum heat absorbing pipe is the core heat absorbing element at solar energy thermal-power-generating station.Vacuum heat absorbing pipe is comprised of metal inner pipe, glass outer tube, glass-to-metal sealing ring etc., metal inner pipe is positioned at the internal layer of vacuum heat absorbing pipe, the glass outer tube is positioned at the skin of vacuum heat absorbing pipe, the dead in line of metal inner pipe and glass outer tube, the glass-to-metal sealing ring is positioned at the two end part of vacuum heat absorbing pipe, glass-to-metal sealing ring one end and metal inner pipe welding, one end and the welding of glass outer tube, the common cavity that forms of metal inner pipe outer wall and glass outer tube wall face and glass-to-metal sealing ring outer wall, extracting vacuum in this cavity forms vacuum sandwich.The outer surface of metal inner pipe scribbles coating for selective absorption, possesses in the sunlight spectral range and has higher absorptance, and have lower transmitting ratio in infrared band.Many vacuum heat absorbing pipes can be realized by the welding to metal inner pipe being connected in series, and the metal inner pipe of many vacuum heat absorbing pipes is welded with header or main pipe can realize being connected in parallel of vacuum heat absorbing pipe.Heat absorber is provided with up and down two headers, realizes the parallel connection between vacuum heat absorbing pipe.
Because vacuum heat absorbing pipe has higher photo-thermal conversion efficiency, in the situation that just can obtain higher temperature than the low light gathering radiant emittance, heat absorber can be arranged larger heat absorption area, can significantly reduce in the heliostat field optically focused process loss of overflowing on the heat absorber surface, greatly reduce the requirement to the heliostat tracking accuracy, thereby be conducive to reduce initial cost and the operating cost of heliostat field.Can arrange steam-water separator depending on the requirement of heat absorber outlet steam parameter, steam-water separator is positioned in the support tower, and steam-water separator is not accepted the heating of solar radiant energy.
Described regenerative system adopts fuse salt as heat storage medium, comprises low thermohaline storage tank, Yi Taishui/steam-fuse salt heat exchanger and supplementary equipment such as fuse salt steam generator, pump for liquid salts and valve of the high temp. salt storage tank of a higher fuse salt of storing temperature, a relatively low fuse salt of storing temperature.The steam side of water/steam-fuse salt heat exchanger is connected with steam turbine with heat absorber respectively by steam line, and the water side of water/steam-fuse salt heat exchanger is connected by pipeline with oxygen-eliminating device.The contiguous support tower of high temp. salt storage tank arranges to reduce the transmission thermal loss of superheated vapor.Water/steam-fuse salt heat exchanger, low thermohaline storage tank and fuse salt steam generator are arranged near the high temp. salt storage tank, low thermohaline storage tank layout adjacent with the high temp. salt storage tank, one side disposed adjacent water/steam-fuse salt heat exchanger of low thermohaline storage tank and high temp. salt storage tank, to reduce the Pipe transfer thermal loss of charging process, the opposite side disposed adjacent fuse salt steam generator of low thermohaline storage tank and high temp. salt storage tank is to reduce the Pipe transfer thermal loss of exothermic process.Regenerative system can be stabilized the fluctuation of solar energy and be used for solar energy deficiency or the generating at night, improves service hours.
Working procedure of the present invention is as follows:
On the solar radiant energy that heliostat is assembled is projected to heat absorber on the support tower, heat absorber is comprised of many vacuum heat absorbing pipes, the difference of the difference of the Salar light-gathering radiant emittance that receives according to each vacuum heat absorbing pipe surface and the heat transfer characteristic of intraductal heat transfer fluid, water, steam water interface and steam are flowing in the metal inner pipe of vacuum heat absorbing pipe.The projection of overwhelming majority optically focused energy flux of radiation sees through the outer surface to the metal inner pipe that is coated with coating for selective absorption through the glass outer tube of vacuum heat absorbing pipe, realizes dropping into efficient absorption and the low thermal radiation loss of solar radiant energy.By with metal inner pipe in water/steam of flowing carry out convection heat exchange, realize that solar energy is to the conversion of water/steam thermal energy.Heat absorber outlet steam can directly be delivered to and drive the generator generating in the steam turbine, also can deliver to water/steam-fuse salt heater heating and melting salt and be used for accumulation of heat.The high-temperature fusion salt for the treatment of regenerative system when solar energy is not enough is delivered to the generating of steam turbine drive generator through fuse salt steam generator heating acquisition superheated vapor.Solar heat power generation system of the present invention is suitable for fan-shaped layout heliostat field and circumferential is arranged heliostat field, has significant advantage at electric motor power tower type solar energy thermal power generation station.
Description of drawings
Fig. 1 tower-type solar thermal power generating system of the present invention;
Fig. 2 direct steam generation formula of the present invention vacuum heat absorbing pipe water/steam heat absorber schematic diagram;
The vacuum heat absorbing pipe schematic diagram that Fig. 3 heat absorber of the present invention is used;
The A-A directional profile figure of Fig. 4 Fig. 2 of the present invention;
Fig. 5 vacuum heat absorbing pipe water with steam-water separator of the present invention/steam heat absorber schematic diagram;
Among the figure: 1 heliostat, 2 support towers, 3 heat absorbers, 4 steam turbine, 5 generators, 6 oxygen-eliminating devices, 7 vapour condenser, 8 feed water pumps, 9 high-temperature fusion salt storage tanks, 10 low temperature molten salt storage tanks, 11 water/steam-fuse salt heat exchanger, 12 fuse salt steam generators, 13 control valves, 14 optically focused energy flux of radiation, 15 feedwater, 16 superheated vapors, 17 fuse salts, 18 vacuum heat absorbing pipes, 19 water supplying tanks, 20 steam headers, 21 steam-water separators, 22 circulating water pump, 23 saturated vapours, 31 metal inner pipes, 32 glass outer tubes, 33 glass-to-metal sealing rings, 34 vacuum sandwichs, 35 coating for selective absorption.
Embodiment
Figure 1 shows that tower-type solar thermal power generating system of the present invention.This power generation system comprises capital equipment and the subsidiary engine equipment such as heliostat 1, support tower 2, heat absorber 3, regenerative system, steam turbine 4 and generator 5, such as pump etc.Support tower 2 is benchmark of this power generation system, heliostat 1 be arranged in support tower 2 around, heat absorber 3 is positioned at the top of support tower 1, flow direction according to thermal fluid, feed water pump 8 and oxygen-eliminating device 6 are connected with heat absorber and are connected successively by pipeline, and feed water pump 8 can be positioned on the support tower 2 or ground, and heat absorber 3 and steam turbine 4 are connected by pipeline, generator 5 and steam turbine 4 adopts coupling to be fixedly connected with, and is connected by pipeline between steam turbine 5 and the vapour condenser 7.High-temperature fusion salt storage tank 9, low temperature molten salt storage tank 10, water/steam-fuse salt heat exchanger 11 and the fuse salt steam generator 12 common regenerative systems that form, the fuse salt side of water/steam-fuse salt heat exchanger 11 is connected with the low temperature molten salt storage tank with high-temperature fusion salt storage tank 9 respectively by pipeline and is connected, the steam side of water/steam-fuse salt heat exchanger 11 is connected with steam turbine with heat absorber 3 respectively by steam line and is connected, and the water side of water/steam-fuse salt heat exchanger 11 is connected with oxygen-eliminating device 6.Fuse salt steam generator 12 is connected with the low temperature molten salt storage tank with high-temperature fusion salt storage tank 9 respectively by pipeline and is connected.Control valve 13 is arranged in when being used for different operating modes operation on the pipeline of system and regulates.Optically focused energy flux of radiation 14 is assembled solar energy by heliostat 1 and is formed, and is used for being projected to the surface of heat absorber 3.Feedwater 15 is thermal fluids in the system, is pumped to from oxygen-eliminating device 6 by feed water pump 8 and absorbs heat the heat absorber 3 or carry out heat exchange the fuse salt steam generator 12 by being pumped to from oxygen-eliminating device 6 by feed water pump 8.Superheated vapor 16 is that thermal fluid and pushing turbine 4 actings in the system drive the working medium that generator 5 generates electricity, and superheated vapor 16 is by generation in the heat absorber 3 or by producing in the fuse salt steam generator 12.
Be projected to the surface of heat absorber 3 through the optically focused energy flux of radiation 14 of heliostat 1 convergence, heated by the feedwater 15 of feed water pump 8 from oxygen-eliminating device 6 pumpings, feedwater 15 is heated to be superheated vapor 16 and is transported to acting drive generator 5 generatings in the steam turbine 4 in heat absorber 3, turbine discharge flows back to oxygen-eliminating device 6 under feed water pump 8 effects after vapour condenser 7 condenses, finish the solar energy heating feedwater 15 direct superheated vapors 16 that produce and carry out power generation process.The superheated vapor 16 that heat absorber 3 produces also can flow in the water/steam of regenerative system-fuse salt heat exchanger 11 and carry out heat exchange with the accumulation of heat working medium fuse salt 17 that flows out from low temperature molten salt storage tank 10, fuse salt 17 is heated to be high-temperature fusion salt and is stored in the high-temperature fusion salt storage tank 9 after heat exchange, superheated vapor 16 is cooled to feedwater 15 and flows back to oxygen-eliminating device 6, continues to absorb heat as heat transfer medium pumped back heat absorber 3.When solar energy is not enough, regenerative system puts into operation, the fuse salt 17 that from high-temperature fusion salt storage tank 9, flows out through 9 heating of fuse salt steam generator from oxygen-eliminating device 6 through the feedwater 15 of feed water pump 8 pumpings to superheated vapor 16, superheated vapor 16 is transported to acting drive generator 5 generatings in the steam turbine 4, turbine discharge flows back to oxygen-eliminating device 6 under feed water pump 8 effects after vapour condenser 7 condenses, finish the Independent Power Generation process of regenerative system.
Figure 2 shows that direct steam generation formula vacuum heat absorbing pipe water of the present invention/steam heat absorber, this heat absorber is comprised of many vacuum heat absorbing pipes 18, water supplying tank 19 and steam header 20.Steam header 20 is positioned at the top of heat absorber, water supplying tank 19 is positioned at the bottom of heat absorber, many vacuum heat absorbing pipes 18 adopt the welding manner series connection to form the vacuum heat absorbing pipe string, the bottom of vacuum heat absorbing pipe string and water supplying tank 19 are welded to connect, and the top of vacuum heat absorbing pipe string and steam header 20 are welded to connect.Series and parallel connections by the vacuum heat absorbing pipe string connects and composes the water of cavity type, flat or column type/steam heat absorber.
The structure of vacuum heat absorbing pipe 18 as shown in Figure 3, vacuum heat absorbing pipe 18 is comprised of metal inner pipe 31, glass outer tube 32 and glass-to-metal sealing ring 33, metal inner pipe 31 and the welding of glass-to-metal sealing ring 33 1 ends, glass outer tube 32 and the welding of glass-to-metal sealing ring 33 the other ends.31 of glass outer tube 32 and metal inner pipes are vacuum sandwich 34, the outer surface of metal inner pipe 31 scribbles coating for selective absorption 35, possess in the sunlight spectral range and have higher absorptance, and in infrared band, has lower transmitting ratio, realization has guaranteed that to 32 lower radiation heat loss of the efficient absorption of solar energy and metal inner pipe 31 outer walls and glass outer tube heat absorber of the present invention can have the higher thermal efficiency.Many vacuum heat absorbing pipe 18 series connection formation sufficient lengths, the vacuum heat absorbing pipe string sees through loss with at least two rows arrangement arranged side by side to reduce, the arrangement of its two vacuum pumpings heat absorption tube string as shown in Figure 4, front-seat vacuum heat absorbing pipe string and rear vacuum pumping heat absorption tube string interlaced arrangement can all be absorbed by the metal inner pipe 31 of vacuum heat absorbing pipe 18 with the optically focused energy flux of radiation 14 of guaranteeing to put into.During work, optically focused energy flux of radiation 14 is projected to glass outer tube 32 surfaces of vacuum heat absorbing pipe 18, the small part energy is reflected onto external environment and is absorbed by glass outer tube 32, most of radiation energy sees through glass outer tube 32 to metal inner pipe 31 outer surfaces, thereby most of energy is absorbed heating of metal inner tube 31, and the small part energy is reflected.Feedwater 15 flows into water supplying tank 19 rear inflows respectively in the vacuum heat absorbing pipe 18 to be carried out flowing into steam header 20 behind the convection heat exchange with metal inner pipe 31, and steam header 20 flows out superheated vapor 16, finishes solar energy to the conversion of water/steam thermal energy.
Figure 5 shows that the present invention with the vacuum heat absorbing pipe water of steam-water separator/steam heat absorber, this heat absorber is comprised of many vacuum heat absorbing pipes 18, water supplying tank 19, steam header 20, steam-water separator 21 and circulating water pump 22.Steam header 20 is positioned at the top of heat absorber, water supplying tank 19 is positioned at the bottom of heat absorber, vacuum heat absorbing pipe 18 adopts the welding manner series connection to form the vacuum heat absorbing pipe string of enough length, the bottom of vacuum heat absorbing pipe string and water supplying tank 19 are welded to connect, and the top of vacuum heat absorbing pipe string is connected with steam-water separator 21.The vacuum heat absorbing pipe string sees through loss with at least 2 rows arrangement arranged side by side to reduce.During work, optically focused energy flux of radiation 14 is projected to vacuum heat absorbing pipe 18 surfaces, the small part energy is reflected onto external environment and is absorbed by glass outer tube 32, most of radiation energy sees through glass outer tube 32 to metal inner pipe 31 outer surfaces, thereby most of energy is absorbed heating of metal inner tube 31, and the small part energy is reflected.Feedwater 15 flows into water supplying tanks 19 rear inflows respectively in the vacuum heat absorbing pipe 18 to be carried out flowing into steam-water separator 21 behind the convection heat exchange with metal inner pipe 31, and under the effect of circulating water pump 22, feedwater 15 is at 21 of vacuum heat absorbing pipe 18 and steam-water separators circulation heat absorption repeatedly.Be heated to be superheated vapor 16 in the vacuum heat absorbing pipe 18 that saturated vapour 23 flows into steam header 20 is connected that produces in the steam-water separator 21 and flow into the 20 rear outflows of steam header, finish solar energy to the conversion of water/steam thermal energy.

Claims (6)

1. the tower-type solar thermal power generating system of a vacuum heat absorbing pipe heat absorber is characterized in that described solar heat power generation system comprises heliostat (1), support tower (2), heat absorber (3), regenerative system, steam turbine (4) and generator (5); Described heliostat (1) be arranged in support tower (2) around, heat absorber (3) is positioned at the top of support tower (1); Feed water pump (8), oxygen-eliminating device (6) are connected 3 with heat absorber) connect successively by pipeline: feed water pump (8) is positioned over support tower (2) upward or ground; Heat absorber (3) is connected by pipeline with steam turbine (4), and generator (5) and steam turbine (4) adopt coupling to be fixedly connected with, and is connected by pipeline between steam turbine (5) and the vapour condenser (7); Described regenerative system is comprised of high-temperature fusion salt storage tank (9), low temperature molten salt storage tank (10), water/steam-fuse salt heat exchanger (11) and fuse salt steam generator (12); The steam side of water/steam-fuse salt heat exchanger (11) is connected 5 with heat absorber (3) with steam turbine respectively by steam line) be connected, the water side of water/steam-fuse salt heat exchanger (11) is connected by pipeline with oxygen-eliminating device (6); The fuse salt side of water/steam-fuse salt heat exchanger (11) is connected 10 with high-temperature fusion salt storage tank (9) with the low temperature molten salt storage tank by pipeline) be connected, fuse salt steam generator (12) is connected 10 with high-temperature fusion salt storage tank (9) with the low temperature molten salt storage tank by pipeline) be connected.
2. according to the tower-type solar thermal power generating system of vacuum heat absorbing pipe heat absorber claimed in claim 1, it is characterized in that described heat absorber is comprised of many vacuum heat absorbing pipes (18), water supplying tank (19) and steam header (20).Steam header (20) is positioned at the top of heat absorber (3), water supplying tank (19) is positioned at the bottom of heat absorber (3), many vacuum heat absorbing pipes (18) adopt the welding manner series connection, form the vacuum heat absorbing pipe string of sufficient length, the bottom of vacuum heat absorbing pipe string and water supplying tank (19) are welded to connect, and the top of vacuum heat absorbing pipe string and steam header (20) are welded to connect.
3. according to the tower-type solar thermal power generating system of vacuum heat absorbing pipe heat absorber claimed in claim 1, it is characterized in that described heat absorber is comprised of many vacuum heat absorbing pipes (18), water supplying tank (19), steam header (20), steam-water separator (21) and circulating water pump (22); Steam header (20) is positioned at the top of heat absorber (3), and water supplying tank (19) is positioned at the bottom of heat absorber (3); Many vacuum heat absorbing pipes (18) adopt the welding manner series connection to form the vacuum heat absorbing pipe string of sufficient length, and the bottom of vacuum heat absorbing pipe string and water supplying tank (19) are welded to connect, and the top of vacuum heat absorbing pipe string (18) is connected with steam-water separator (21); At least 2 vacuum pumping heat absorption tube strings are arranged in juxtaposition; Be heated to be in the vacuum heat absorbing pipe (18) that the saturated vapour (23) that produces in the steam-water separator (21) flows into steam header (20) is connected and flow out after superheated vapor (16) flows into steam header (20).
4. according to the tower-type solar thermal power generating system of vacuum heat absorbing pipe heat absorber claimed in claim 1, it is characterized in that described heliostat (1) is arranged as fan-shaped layout or the circumference type is arranged.
5. according to the tower-type solar thermal power generating system of claim 2 or 3 described vacuum heat absorbing pipe heat absorbers, it is characterized in that in the described heat absorber (3), arrange the vacuum heat absorbing pipe string that consists of cavity type, flat or column type after vacuum heat absorbing pipe (18) series connection.
6. according to the tower-type solar thermal power generating system of vacuum heat absorbing pipe heat absorber claimed in claim 1, it is characterized in that in the described regenerative system: the contiguous support tower of high temp. salt storage tank (9) is arranged; Water/steam-fuse salt heat exchanger (11), low thermohaline storage tank (10) and fuse salt steam generator (12) are arranged near the high temp. salt storage tank (9), low thermohaline storage tank (10) and the adjacent layout of high temp. salt storage tank (9), a side disposed adjacent water/steam of low thermohaline storage tank (10) and high temp. salt storage tank (9)-fuse salt heat exchanger (11); The opposite side disposed adjacent fuse salt steam generator (12) of low thermohaline storage tank (10) and high temp. salt storage tank (9), water/steam-fuse salt heat exchanger (11) is connected 10 with high-temperature fusion salt storage tank (9) with the low temperature molten salt storage tank respectively by pipeline) be connected, fuse salt steam generator (12) is connected 10 with high-temperature fusion salt storage tank (9) with the low temperature molten salt storage tank respectively by pipeline) be connected; Heat absorber (3) is connected by pipeline with water/steam-fuse salt heat exchanger (11); Described regenerative system adopts fuse salt as heat storage medium.
CN201210316580.6A 2012-08-30 2012-08-30 Tower type solar thermal power generation system for heat absorber of vacuum heat absorption pipes Expired - Fee Related CN102852742B (en)

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