CN103267374B - Solar heat collection and energy storage device, solar thermal electricity generation equipment and control method of solar thermal electricity generation equipment - Google Patents
Solar heat collection and energy storage device, solar thermal electricity generation equipment and control method of solar thermal electricity generation equipment Download PDFInfo
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- CN103267374B CN103267374B CN201310194670.7A CN201310194670A CN103267374B CN 103267374 B CN103267374 B CN 103267374B CN 201310194670 A CN201310194670 A CN 201310194670A CN 103267374 B CN103267374 B CN 103267374B
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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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- 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
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
The invention discloses a solar heat collection and energy storage device, solar thermal electricity generation equipment and a control method of the solar thermal electricity generation equipment. The solar heat collection and energy storage device is formed by a solar heat collection device and a high-temperature energy storage device in a connected mode, and the solar heat collection device is formed in the method that a plurality of heat collection modules and a plurality of focusing modules are connected through a solar heat collection device formed by a plurality connecting pipes in series with step-heating. The solar thermal electricity generation equipment comprises the solar heat collection and energy storage device, an automatic control device and a constant-temperature steamer electricity generation device. Heat energy stored in the solar heat collection and energy storage device is transported to a constant-temperature tank of the constant-temperature steamer electricity generation device to provide thermal electricity generation energy sources for the constant-temperature steamer electricity generation device; the automatic control device is used for controlling the solar heat collection and energy storage device and the constant-temperature steamer electricity generation device to work. The invention further discloses the control method of the solar thermal electricity generation equipment. Compared with the prior art, the solar heat collection and energy storage device, the solar thermal electricity generation equipment and the control method of the solar thermal electricity generation equipment have the advantages that heat collection temperatures are improved, the heat preservation effect is enhanced, heat energy use ratios are high, cost is low, structure is simple and installation is convenient.
Description
Technical field
The present invention relates to a kind of solar heat collection, energy storage device, solar thermal power plants and control method.
Background technology
Going from bad to worse and intrinsic petrochemical industry fossil energy day by day deficient and in the new forms of energy such as exploitation water, core, wind, nighttide of facing mankind living environment today, they all also exist again the uncontrollable multiple potential safety hazard of the mankind; So seek a kind of safe and reliable new forms of energy, to solve the energy demand in human development, become the research topic that numerous scientific workers seek assiduously.The sun gives the cleaning of the mankind, safe and reliable green energy resource as universe, attracts the sight of numerous scientific and technical personnel already, more has benevolence person to do one's utmost for it to devote oneself as long as life endures.
The sun confers the inexhaustible green energy resource treasure-house of the mankind as universe, how she is developed to generally general clear energy sources electric energy with regard to it; From 1840s, the scientist of countries in the world has carried out large quantity research, in succession have developed the technology that multiple solar energy is converted to electric energy; As: dish-style, disc type, slot type, tower type thermal generation equipment and monocrystalline silicon, polysilicon, PI film photovoltaic generating equipment.But due to the sun to arrive earth surface from universe time, be subject to the impact of multiple natural cause, cause existing solar energy generation technology to there is such-and-such defect, as: uncontrollable, investment is large, efficiency is low, mounting condition is limited etc.Cause also cannot make solar energy today, really become the new forms of energy that can generally use in human social development.The application at application number be the solar thermal collection system of 201210087504.2 basis on improve.
Summary of the invention
Technical problem to be solved by this invention overcomes above-mentioned deficiency existing in prior art, and the solar heat collection, energy storage device, solar thermal power plants and the control method that provide a kind of small investment, efficiency high, controlled, by in, cryogenic fluid is converted to clean energy resource electricity solar thermal energy, makes solar energy become main energy sources in human development.
The present invention solves the problems of the technologies described above adopted technical scheme and comprises: a kind of solar heat collection, energy storage device, it is characterized in that solar heat collection, energy storage device is connected and composed by solar energy heat collector and high-temperature energy accumulation device, described solar energy heat collector is by heat collecting module, focus module is connected and composed by union pipe, heat collecting module comprises several large space vacuum heat collection pipes and a resistant to elevated temperatures header, described large space vacuum heat collection pipe comprises outer tube and interior pipe, interior pipe adopts the heat-exchange tube of band heat transmission fin, the vacuum heat-preserving layer thickness of large space vacuum heat collection pipe is more than ten times of the outer tube thickness of large space vacuum heat collection pipe, heat-exchange tube and heat transmission fin fit tightly, heat-exchange tube is provided with passage of heat, the passage of heat of heat-exchange tube is connected to heat-exchange tube again by the heat transmission fin that heat-exchange tube entrance is U-shaped through both sides and exports, the heat-exchange tube of several large space vacuum heat collection pipes of heat collecting module is by union pipe parallel communication.
Focus module of the present invention comprises focus lamp, large space vacuum heat collection pipe and resistant to elevated temperatures header, and focus lamp, large space vacuum heat collection pipe are installed on header.
High-temperature energy accumulation device of the present invention comprises high temperature energy-storage tank, energy storage circulation control valve, energy storage circulating pump, flow control valve, exhaust-valve, emptying intake valve, drain pump, energy storage pump inlet exports with high temperature energy-storage tank and is connected, energy storage circulating-pump outlet is connected with Flow-rate adjustment valve inlet, Flow-rate adjustment valve outlet port is connected with solar energy heat collector entrance, energy storage circulation control valve is arranged between energy storage circulating pump and flow control valve, solar energy heat collector outlet is connected with high temperature energy-storage tank entrance, emptying intake valve is arranged on the union pipe of solar energy heat collector outlet, drain pump outlet is connected with high temperature energy-storage tank, drain pump entrance is connected with solar energy heat collector entrance by exhaust-valve.
High temperature energy-storage tank of the present invention is provided with thermal insulating warm-keeping layer, rigid layer, heat-insulating material and shell from inside to outside, and thermal insulating warm-keeping layer adopts asbestos pottery to make, and heat-insulating material adopts rock wool.
The present invention solves the problems of the technologies described above adopted technical scheme and also comprises: a kind of solar thermal power plants, described solar thermal power plants comprises automaton, constant temperature turbine generator device and above-mentioned solar heat collection, energy storage device, described constant temperature turbine generator device comprises thermostatic pump, thermostatic tank, steam generator, steam turbine intake valve, steam turbine, generator, condenser, high-pressure circulation pump, thermostatic pump and thermostatic tank, high temperature energy-storage tank connects, steam generator in thermostatic tank is connected with steam turbine by steam turbine intake valve, steam turbine and generator, condenser connects, condenser is connected with high-pressure circulation pump, high-pressure circulation pump is connected with steam generator, the heat energy stored in solar heat collection, energy storage device is delivered in the thermostatic tank of constant temperature turbine generator device, there is provided constant temperature turbine generator device hot power generation energy resource, automaton is used for controlling solar heat collection, energy storage device, constant temperature turbine generator device works.
Automaton of the present invention comprises digital control computer control device, solar energy heat collector middle heat photosensitive elements, solar energy heat collector outlet temperature-sensitive element, energy storage canister temperature controller, thermostatic tank temperature controller, energy storage circulation control valve, thermostatic control valve, boiler pressure instrument, thermostatic control valve is located on the connecting line between high temperature energy-storage tank and thermostatic tank, digital control computer control device is by wire and solar energy heat collector middle heat photosensitive elements, solar energy heat collector outlet temperature-sensitive element, energy storage canister temperature controller, thermostatic tank temperature controller, energy storage circulation control valve, flow control valve, exhaust-valve, emptying intake valve, thermostatic control valve, energy storage circulating pump, thermostatic pump, high-pressure circulation pump, drain pump, steam turbine intake valve, boiler pressure instrument is electrically connected, to control solar heat collection, energy storage device, constant temperature turbine generator device is according to setting program work.
The present invention solves the problems of the technologies described above adopted technical scheme and also comprises: a kind of control method of solar thermal power plants, comprise the following steps: according to selected Turbo-generator Set, working medium and service condition, determine thermostatic tank temperature operation interval and boiler pressure operation interval; Digital control computer control device controls the work of solar heat collection, energy storage device; When energy storage canister temperature controller detected temperatures is higher than thermostatic tank design temperature, thermostatic control valve is opened, thermostatic pump is opened, the steam turbine inlet open when boiler pressure instrument detected pressures rises to steam generator operating pressure setting value, high-pressure circulation pump is opened, and solar thermal power plants enters continuous and stable electric generation running status; When thermostatic tank temperature controller detected temperatures reaches thermostatic tank temperature capping value, thermostatic pump, thermostatic control valve are closed; When thermostatic tank temperature controller detected temperatures drops to close to thermostatic tank temperature preset lower limit, thermostatic pump, thermostatic control valve are opened, and go round and begin again and realize steadily generating; When energy storage canister temperature controller detected temperatures drops to below thermostatic tank design temperature lower limit, solar thermal power plants is out of service, closes solar heat collection, energy storage device, closes constant temperature turbine generator device (closing its each parts).
Digital control computer control device of the present invention controls solar heat collection, energy storage device job step and comprises the following steps: when solar energy heat collector outlet temperature-sensitive element detected temperatures exceedes energy storage canister temperature controller detected temperatures and reaches the cycle sets temperature of solar heat collection, energy storage device, the energy-accumulating medium that digital control computer control device controls in high temperature energy-storage tank is heated up by solar energy heat collector circulation, energy storage circulation control valve is opened, and energy storage circulating pump starts; When solar energy heat collector outlet temperature-sensitive element detected temperatures changes the output temperature scope exceeding the setting of solar heat collection, energy storage device, digital control computer control device, by flow control valve flow automatic regulation, regulates solar energy heat collector outlet temperature; Solar heat collection, energy storage device is closed when solar energy heat collector outlet temperature-sensitive element detected temperatures drops to identical with the high temperature energy-storage tank temperature that energy storage canister temperature controller detects.
Close solar heat collection, energy storage device step described in the present embodiment and comprise the closedown of energy storage circulation control valve, energy storage circulation pump, exhaust-valve, emptying INO, drain pump starts, after accumulation of energy medium in solar energy heat collector is sent into high temperature energy-storage tank, exhaust-valve, emptying intake valve, drain pump are closed, and realize waste heat and make full use of.
The major function of solar energy heat collector middle heat photosensitive elements of the present invention shifts to an earlier date anticipation solar energy heat collector outlet temperature (solar energy heat collector outlet temperature-sensitive element detected temperatures), improves the thermal efficiency and prevent energy-accumulating medium carbonization simultaneously; When solar energy heat collector middle heat photosensitive elements detected temperatures reaches more than the cycle sets temperature of solar heat collection, energy storage device, solar energy heat collector middle heat photosensitive elements detected temperatures often rises 5 DEG C and tunes up accumulation of energy rate-of flow 5%; When solar energy heat collector middle heat photosensitive elements detected temperatures drops to below the cycle sets temperature of solar heat collection, energy storage device, solar energy heat collector middle heat photosensitive elements detected temperatures often declines 5 DEG C and turns accumulation of energy rate-of flow 5% down, with stable focusing heat collection body outlet temperature, improve energy-accumulating medium service life.
The cycle sets temperature of solar heat collection, energy storage device of the present invention is 200 ~ 250 degrees Celsius, the output temperature scope 380 ~ 400 degrees Celsius of solar heat collection, energy storage device setting, high temperature energy-storage tank design temperature is 380 ~ 400 degrees Celsius, thermostatic tank setting operating temperature range is 150 ~ 200 degrees Celsius, and steam generator operating pressure setting value is between 2 ~ 4 MPas.
The present invention compared with prior art, has the following advantages and effect: 1, the full glass vacuum heat collection pipe in large space improves heat-collecting temperature and heat insulation effect, and thermal power transfer utilization rate reaches more than 90%; 2, because heat collector is main composition by the simple glass heat-collecting vacuum tube of manufacturing process, investment superiority of effectiveness is remarkable, with existing solar energy thermal-power-generating device ratio, can reduce investment and reach more than 50%; 3, whole-course automation controls, and energy storage for organically combining with the accumulation of energy of paddy electricity while of main with solar energy, reaches and saves more money.Solar energy and electricity is made really to become the complementary green novel energy source used; 4, overall structure is simple, easy for installation, does not limit by geographical climate environment condition, for industrial and agricultural production large electricity consumer carries out energy-conservation technological transformation, reduces discharging and save money, provides a kind of economic, safe and reliable green clean energy resource electricity.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention heat collecting module.
Fig. 2 is the structural representation of embodiment of the present invention solar energy heat collector.
Fig. 3 is the close-up schematic view of Fig. 2.
Fig. 4 is the structural representation of embodiment of the present invention solar thermal power plants.
Fig. 5 is the structural representation of embodiment of the present invention high-temperature energy accumulation device.
Fig. 6 is the structural representation of embodiment of the present invention constant temperature turbine generator device.
Fig. 7 is the partial schematic diagram of embodiment of the present invention heat collecting module.
In figure, large space vacuum heat collection pipe 1, heat-exchange tube 1-1, passage of heat 1-2, heat transmission fin 1-3, heat collecting module 2, header 3, union pipe 4, focus lamp 5, focus module 6, solar energy heat collector outlet temperature-sensitive element 7, energy storage canister temperature controller 8, energy storage circulation control valve 9, , energy storage circulating pump 10, high temperature energy-storage tank 11, thermal insulating warm-keeping layer 11-1, rigid layer 11-2, heat-insulating material 11-3, shell 11-4, flow control valve 12, digital control computer control device 13, solar energy heat collector middle heat photosensitive elements 14, emptying intake valve 15, thermostatic tank temperature controller 16, thermostatic control valve 17, thermostatic pump 18, thermostatic tank 19, steam generator 19-1, steam turbine 20, steam turbine intake valve 20-1, generator 21, condenser 22, high-pressure circulation pump 23, drain pump 24, exhaust-valve 25, boiler pressure instrument 28.
Detailed description of the invention
See Fig. 1 ~ Fig. 7, embodiment of the present invention solar heat collection, energy storage device is connected and composed by solar energy heat collector and high-temperature energy accumulation device, be transported in high-temperature energy accumulation device by the accumulation of energy medium (be generally middle temperature medium or cryogenic media, special case is oil) heated in solar energy heat collector and store and be used as the hot energy generated electricity.
The present embodiment heat collecting module 2 comprises several large space vacuum heat collection pipes 1 and a resistant to elevated temperatures header 3, described large space vacuum heat collection pipe 1 comprises outer tube and interior pipe, interior pipe adopts band heat transmission fin 1-3(U type bend pipe) heat-exchange tube 1-1, more than ten times that the vacuum heat-preserving layer thickness of large space vacuum heat collection pipe 1 (between large space vacuum heat collection pipe 1 outer tube and interior pipe distance) is diametrically the outer tube thickness of large space vacuum heat collection pipe 1, each heat-exchange tube 1-1 and heat transmission fin 1-3 fits tightly and improves exchange rate for increasing heat-conducting area, each heat-exchange tube 1-1 is provided with passage of heat 1-2, the passage of heat 1-2 of each heat-exchange tube 1-1 is connected to heat-exchange tube 1-1 again by the heat transmission fin 1-3 for increasing heat-conducting area that heat-exchange tube 1-1 entrance is U-shaped through both sides and exports, the heat-exchange tube 1-1 of several large space vacuum heat collection pipes 1 of each heat collecting module 2 by be with union pipe 4 parallel communication of heat-insulation layer (the heat-exchange tube 1-1 entrance that described UNICOM in parallel refers to several large space vacuum heat collection pipes 1 all with inlet tube 41 UNICOM of union pipe 4, the heat-exchange tube 1-1 of several large space vacuum heat collection pipes 1 export all with outlet 42 UNICOM of union pipe 4, namely enter together between several heat-exchange tubes 1-1 with going out, so that augmented flow), accumulation of energy medium is made to absorb solar energy by several heat-exchange tubes 1-1 heat transmission fin 1-3 is as far as possible more and often just improves one-level temperature through a heat collecting module 2 simultaneously, reach the object that heat collecting module 2 improves accumulation of energy medium temperature step by step.Several large space vacuum heat collection pipes 1 are arranged on header 3 and form a heat collecting module 2, and header 3 is provided with high-temperature-resistant thermal-insulation material 3-1.Large space vacuum heat collection pipe 1 adopts glass to make.
Focus module 6 described in the present embodiment comprises focus lamp 5, large space vacuum heat collection pipe 1(is identical with large space vacuum heat collection pipe 1 structure in above-mentioned heat collecting module 2) and resistant to elevated temperatures header 3; Focus lamp 5, large space vacuum heat collection pipe 1 are installed in (see Fig. 2) on header 3.
Solar energy heat collector to be connected by several union pipes 4 by several heat collecting modules 2, several focus module 6 and (refers to the heat-exchange tube 1-1 of heat collecting module 2, the heat-exchange tube 1-1 of focus module 6 is communicated with by union pipe 4, lower same) form, wherein the heat collecting module 2 of previous stage or the heat-exchange tube 1-1 of focus module 6 are connected with the heat collecting module 2 of rear stage or the heat-exchange tube 1-1 of focus module 6 by union pipe 4, thus form the solar energy heat collector that is passed through the series connection stepped heating of heat collecting module 2 and focus module 6.
As the special case that above-mentioned series connection is heated, several heat collecting modules 2 are connected with several focus module 6 be connected successively by union pipe 4 after can being connected successively by union pipe 4 again, and described in the present embodiment, several all refer to more than 2 or 2, are generally 2 ~ 5.
The present embodiment large space vacuum heat collection pipe 1 and heat-exchange tube 1-1 thereof are U-shaped, the inlet port of the heat-exchange tube 1-1 of large space vacuum heat collection pipe 1 is all communicated with union pipe 4, so that the accumulation of energy medium in union pipe 4 can absorb solar energy as far as possible by the U-shaped bend pipe of heat-exchange tube 1-1, improve the temperature of accumulation of energy medium step by step, when there being sunlight heats, accumulation of energy medium is higher the closer to solar energy heat collector outlet (this example i.e. last focus module 6 exports, see Fig. 2 upper end) temperature.
The present embodiment solar energy heat collector middle heat photosensitive elements 14 is arranged in the middle part of solar energy heat collector, and special case is the exit being located at last heat collecting module 2 be cascaded; Solar energy heat collector outlet temperature-sensitive element 7 is located at solar energy heat collector exit, and special case is the exit being located at last focus module 6 be cascaded.
The present invention solves the problems of the technologies described above adopted technical scheme and comprises a kind of solar thermal power plants, described solar thermal power plants comprises solar heat collection, energy storage device, automaton, constant temperature turbine generator device, the heat energy that solar energy heat collector obtains is delivered to the high temperature energy-storage tank 11 of high-temperature energy accumulation device by union pipe 4, heat energy in high temperature energy-storage tank 11 is delivered to the thermostatic tank 19 of constant temperature turbine generator device again, the steam that steam generator 19-1 produces under the control and regulation of automaton delivers to steam turbine 20, generator 21 carries out continuously, stable, controlled generating.
The present embodiment high-temperature energy accumulation device comprises high temperature energy-storage tank 11, energy storage circulation control valve 9, energy storage circulating pump 10, flow control valve 12, exhaust-valve 25, emptying intake valve 15, drain pump 24, energy storage circulating pump 10 import exports with high temperature energy-storage tank 11 and is connected, energy storage circulating pump 10 outlet is connected with flow control valve 12 entrance, flow control valve 12 outlet is connected (Fig. 2 lower-left) with solar energy heat collector entrance, energy storage circulation control valve 9 is arranged between energy storage circulating pump 10 and flow control valve 12, solar energy heat collector outlet (Fig. 2 upper right) is by union pipe 4 and high temperature energy-storage tank 11(top) entrance is connected, emptying intake valve 15 is arranged on the union pipe 4 of solar energy heat collector outlet, drain pump 24 outlet is connected with high temperature energy-storage tank 11, drain pump 24 entrance is connected with solar energy heat collector entrance by exhaust-valve 25.High temperature energy-storage tank 11 is provided with thermal insulating warm-keeping layer 11-1, rigid layer 11-2, heat-insulating material 11-3 and shell 11-4 from inside to outside.The present embodiment thermal insulating warm-keeping layer 11-1 adopts asbestos pottery to make, and heat-insulating material 11-3 adopts rock wool.
Constant temperature turbine generator device described in the present embodiment comprises thermostatic pump 18, thermostatic tank 19, steam generator 19-1, steam turbine intake valve 20-1, steam turbine 20, generator 21, condenser 22, high-pressure circulation pump 23, thermostatic pump 18 is connected with thermostatic tank 19, high temperature energy-storage tank 11, steam generator 19-1 in thermostatic tank 19 is connected with steam turbine 20 by steam turbine intake valve 20-1, steam turbine 20 is connected with generator 21, condenser 22, condenser 22 is connected with high-pressure circulation pump 23, and high-pressure circulation pump 23 is connected with steam generator 19-1.
Automaton described in the present embodiment comprises digital control computer control device 13, solar energy heat collector middle heat photosensitive elements 14, solar energy heat collector outlet temperature-sensitive element 7, energy storage canister temperature controller 8, thermostatic tank temperature controller 16, thermostatic control valve 17, boiler pressure instrument 28, and thermostatic control valve 17 is located on the connecting line between high temperature energy-storage tank 11 and thermostatic tank 19; Digital control computer control device 13 exports temperature-sensitive element 7 by wire and solar energy heat collector middle heat photosensitive elements 14, solar energy heat collector, energy storage canister temperature controller 8, thermostatic tank temperature controller 16, energy storage circulation control valve 9, flow control valve 12, exhaust-valve 25, emptying intake valve 15, thermostatic control valve 17, energy storage circulating pump 10, thermostatic pump 18, high-pressure circulation pump 23, drain pump 24, steam turbine intake valve 20-1, boiler pressure instrument 28 are electrically connected, and controls the operation of electrical equipment.
The present invention is by the improvement of solar energy vacuum heat collecting structure, heat collecting module 2 is composed in parallel by adopting large space vacuum heat collection pipe 1, heat collecting module 2 improves heat-collecting temperature by focus module 6 again after repeatedly connecting, solar energy heat collector is made to obtain a large amount of heat energy, and make it be in hot operation state always, directly accumulation of energy dielectric heating is sent into high temperature energy-storage tank 11 store to needs temperature, passing through automaton (system) without when the sun or sunlight shakiness, heat energy storage stable and uniform is supplied to solar thermal power plants in an orderly manner; Realize continuous, even, controlled generating object.By high temperature energy-storage solve occur in existing solar electrical energy generation uncontrollable, unstable, without the sun namely without the defect of electricity, thus the green novel energy source making solar energy really become alternative mineral to generate electricity.
The present invention reduces heat energy loss by high temperature energy-storage tank 11, effectively improves heat insulation effect and extends working time, making the heat energy obtained in setting-up time, send electric energy continuously and stably for human lives's Production requirement.
Technical method that the present invention adopts is: 1, first according to single group accumulation of energy rate-of flow, large space vacuum heat collection pipe 1 is unified into heat collecting module 2.2, calculate required heat energy by accumulation of energy rate-of flow and heat collecting module 2 is connected into huge heat collection body, interval to 200 ~ 250 DEG C (temperature that solar energy heat collector middle heat photosensitive elements 14 detects) for the accumulation of energy dielectric heating of heat collection body outlet.3, (solar energy heat collector outlet temperature-sensitive element 7 detects the temperature obtained to make vacuum heat-collecting temperature rise to the condition of high temperature 380 ~ 400 DEG C by focusing cascaded structure again, can be realized by adjustment heat collecting module 2 and the structure of focus module 6, quantity, size as required), at this moment after accumulation of energy media set hot body is heated to high temperature, accumulation of energy medium is sent into high temperature energy-storage tank 11 from the port of export by pipeline and is stored, in order to continuing to provide thermal source to solar thermal power plants.The present invention large space vacuum heat collection pipe 1 adopts glass to make, and realizes high-temperature heat-gathering energy storage, considerably reduces the cost of investment of existing solar energy thermal-power-generating.
The control method of solar thermal power plants of the present invention is: 1, first according to selected Turbo-generator Set, working medium and service condition, determines thermostatic tank 19 temperature operation interval and steam generator 19-1 pressure duty interval; 2, digital control computer control device 13 controls the work of solar heat collection, energy storage device; 3, when energy storage canister temperature controller 8 detected temperatures is higher than thermostatic tank 19 design temperature, thermostatic control valve 17 is opened, thermostatic pump 18 is opened, when boiler pressure instrument 28 detected pressures rises to steam generator 19-1 operating pressure setting value, steam turbine intake valve 20-1 opens, high-pressure circulation pump 23 is opened, and solar thermal power plants enters continuous and stable electric generation running status; 4, when thermostatic tank temperature controller 16 detected temperatures reaches thermostatic tank 19 temperature capping value, thermostatic pump 18, thermostatic control valve 17 are closed; When thermostatic tank temperature controller 16 detected temperatures drops to close to (can being a scope during thermostatic tank 19 temperature preset lower limit, such as, when thermostatic tank temperature controller 16 detected temperatures is more than thermostatic tank 19 temperature preset lower limit 5 ~ 10 degrees Celsius), thermostatic pump 18, thermostatic control valve 17 are opened, and go round and begin again and realize steadily generating; 5, when energy storage canister temperature controller 8 detected temperatures drops to below thermostatic tank 19 design temperature lower limit, solar thermal power plants is out of service, closes solar heat collection, energy storage device, closes constant temperature turbine generator device (closing its each parts).
Described digital control computer control device 13 controls solar heat collection, energy storage device job step and comprises the following steps: when solar energy heat collector outlet temperature-sensitive element 7 detected temperatures exceedes energy storage canister temperature controller 8 detected temperatures and reaches the cycle sets temperature of solar heat collection, energy storage device, the energy-accumulating medium that digital control computer control device 13 controls in high temperature energy-storage tank 11 is heated up by solar energy heat collector circulation, energy storage circulation control valve 9 is opened, and energy storage circulating pump 10 starts; When solar energy heat collector outlet temperature-sensitive element 7 detected temperatures changes the output temperature scope exceeding the setting of solar heat collection, energy storage device, digital control computer control device 13, by flow control valve 12 flow automatic regulation, regulates and stablizes solar energy heat collector outlet temperature; Solar heat collection, energy storage device is closed when solar energy heat collector outlet temperature-sensitive element 7 detected temperatures drops to identical with high temperature energy-storage tank 11 temperature that energy storage canister temperature controller 8 detects.
Close solar heat collection, energy storage device step described in the present embodiment to comprise energy storage circulation control valve 9 and close, energy storage circulating pump 10 cuts out, exhaust-valve 25, emptying intake valve 15 are opened, drain pump 24 starts, after trapped fuel in solar energy heat collector is sent into high temperature energy-storage tank 11, exhaust-valve 25, emptying intake valve 15, drain pump 24 are closed, and realize waste heat and make full use of.
The cycle sets temperature of solar heat collection, energy storage device of the present invention is 200 ~ 250 degrees Celsius, the output temperature scope 380 ~ 400 degrees Celsius of solar heat collection, energy storage device setting, high temperature energy-storage tank 11 design temperature is 380 ~ 400 degrees Celsius, it is 150 ~ 200 degrees Celsius that thermostatic tank 19 sets operating temperature range, and steam generator 19-1 operating pressure setting value is between 2 ~ 4 MPas.
The major function of solar energy heat collector middle heat photosensitive elements 14 of the present invention shifts to an earlier date anticipation solar energy heat collector outlet temperature (solar energy heat collector outlet temperature-sensitive element 7 detected temperatures), improves the thermal efficiency and prevent energy-accumulating medium carbonization simultaneously; When solar energy heat collector middle heat photosensitive elements 14 detected temperatures reaches more than the cycle sets temperature (special case is 200 DEG C) of solar heat collection, energy storage device, otherwise solar energy heat collector middle heat photosensitive elements 14 detected temperatures is often risen 5 DEG C and tunes up accumulation of energy rate-of flow 5% and then turn accumulation of energy rate-of flow 5%(down and regulated by flow control valve 12, namely tune up flow 5% when solar energy heat collector middle heat photosensitive elements 14 detected temperatures reaches 205 DEG C and is less than 210 DEG C, when reaching 210 DEG C and be less than 215 DEG C, tune up flow 10%...; Flow 5% is turned down when solar energy heat collector middle heat photosensitive elements 14 detected temperatures drops to lower than 195 DEG C and is greater than 190 DEG C, lower than 190 DEG C and turn flow 10%... down when being less than 185 DEG C), stablize focusing heat collection body outlet temperature, improve energy-accumulating medium service life.
The present invention compared with prior art, has the following advantages and effect: 1, the full glass vacuum heat collection pipe in large space improves heat-collecting temperature and heat insulation effect, and thermal power transfer utilization rate reaches more than 90%; 2, because heat collector is main composition by the simple glass heat-collecting vacuum tube of manufacturing process, investment superiority of effectiveness is remarkable, with existing solar energy thermal-power-generating device ratio, can reduce investment and reach more than 50%; 3, whole-course automation controls, and energy storage for organically combining with the accumulation of energy of paddy electricity while of main with solar energy, reaches and saves more money.Solar energy and electricity is made really to become the complementary green novel energy source used; 4, overall structure is simple, easy for installation, does not limit by geographical climate environment condition, for industrial and agricultural production large electricity consumer carries out energy-conservation technological transformation, reduces discharging and save money, provides a kind of economic, safe and reliable green clean energy resource electricity.
The simple deformation of the technology of the present invention feature or technical scheme and combination, should think and fall into protection scope of the present invention.
Claims (5)
1. a control method for solar thermal power plants, described solar thermal power plants comprises automaton, constant temperature turbine generator device and solar heat collection, energy storage device, described constant temperature turbine generator device comprises thermostatic pump, thermostatic tank, steam generator, steam turbine intake valve, steam turbine, generator, condenser, high-pressure circulation pump, thermostatic pump and thermostatic tank, high temperature energy-storage tank connects, and the steam generator in thermostatic tank is connected with steam turbine by steam turbine intake valve, steam turbine and generator, condenser connects, condenser is connected with high-pressure circulation pump, high-pressure circulation pump is connected with steam generator, the heat energy stored in solar heat collection, energy storage device is delivered in the thermostatic tank of constant temperature turbine generator device, there is provided constant temperature turbine generator device hot power generation energy resource, automaton is used for controlling solar heat collection, energy storage device, constant temperature turbine generator device works, and described automaton comprises digital control computer control device, solar energy heat collector middle heat photosensitive elements, solar energy heat collector outlet temperature-sensitive element, energy storage canister temperature controller, thermostatic tank temperature controller, thermostatic control valve, boiler pressure instrument, thermostatic control valve is located on the connecting line between high temperature energy-storage tank and thermostatic tank, and digital control computer control device is by wire and solar energy heat collector middle heat photosensitive elements, solar energy heat collector outlet temperature-sensitive element, energy storage canister temperature controller, thermostatic tank temperature controller, energy storage circulation control valve, flow control valve, exhaust-valve, emptying intake valve, thermostatic control valve, energy storage circulating pump, thermostatic pump, high-pressure circulation pump, drain pump, steam turbine intake valve, boiler pressure instrument is electrically connected, and described solar heat collection, energy storage device is connected and composed by solar energy heat collector and high-temperature energy accumulation device, and described high-temperature energy accumulation device comprises high temperature energy-storage tank, energy storage circulation control valve, energy storage circulating pump, flow control valve, exhaust-valve, emptying intake valve, drain pump, energy storage pump inlet exports with high temperature energy-storage tank and is connected, energy storage circulating-pump outlet is connected with Flow-rate adjustment valve inlet, Flow-rate adjustment valve outlet port is connected with solar energy heat collector entrance, energy storage circulation control valve is arranged between energy storage circulating pump and flow control valve, solar energy heat collector outlet is connected with high temperature energy-storage tank entrance, emptying intake valve is arranged on the union pipe of solar energy heat collector outlet, drain pump outlet is connected with high temperature energy-storage tank, drain pump entrance is connected with solar energy heat collector entrance by exhaust-valve, it is characterized in that comprising the following steps: according to selected Turbo-generator Set, working medium and service condition, determine thermostatic tank temperature operation interval and boiler pressure operation interval, digital control computer control device controls the work of solar heat collection, energy storage device, when energy storage canister temperature controller detected temperatures is higher than thermostatic tank design temperature, thermostatic control valve is opened, thermostatic pump is opened, the steam turbine inlet open when boiler pressure instrument detected pressures rises to steam generator operating pressure setting value, high-pressure circulation pump is opened, and solar thermal power plants enters continuous and stable electric generation running status, when thermostatic tank temperature controller detected temperatures reaches thermostatic tank design temperature higher limit, thermostatic pump, thermostatic control valve are closed, when thermostatic tank temperature controller detected temperatures drops to close to thermostatic tank design temperature lower limit, thermostatic pump, thermostatic control valve are opened, and go round and begin again and realize steadily generating, when energy storage canister temperature controller detected temperatures drops to below thermostatic tank design temperature lower limit, solar thermal power plants is out of service, closes solar heat collection, energy storage device, closes constant temperature turbine generator device.
2. the control method of solar thermal power plants according to claim 1, it is characterized in that: described digital control computer control device controls solar heat collection, energy storage device job step and comprises the following steps: when solar energy heat collector outlet temperature-sensitive element detected temperatures exceedes energy storage canister temperature controller detected temperatures and reaches the cycle sets temperature of solar heat collection, energy storage device, the energy-accumulating medium that digital control computer control device controls in high temperature energy-storage tank is heated up by solar energy heat collector circulation, energy storage circulation control valve is opened, and energy storage circulating pump starts; When solar energy heat collector outlet temperature-sensitive element detected temperatures changes the output temperature scope exceeding the setting of solar heat collection, energy storage device, digital control computer control device, by flow control valve flow automatic regulation, regulates solar energy heat collector outlet temperature; Solar heat collection, energy storage device is closed when solar energy heat collector outlet temperature-sensitive element detected temperatures drops to identical with the high temperature energy-storage tank temperature that energy storage canister temperature controller detects.
3. the control method of solar thermal power plants according to claim 1, it is characterized in that: described closedown solar heat collection, energy storage device step comprises energy storage circulation control valve and closes, energy storage circulation pump, exhaust-valve, emptying INO, drain pump starts, after accumulation of energy medium in solar energy heat collector is sent into high temperature energy-storage tank, exhaust-valve, emptying intake valve, drain pump are closed.
4. the control method of solar thermal power plants according to claim 2, it is characterized in that: when solar energy heat collector middle heat photosensitive elements detected temperatures reaches more than the cycle sets temperature of solar heat collection, energy storage device, solar energy heat collector middle heat photosensitive elements detected temperatures often rises 5 DEG C and tunes up accumulation of energy rate-of flow 5%; When solar energy heat collector middle heat photosensitive elements detected temperatures drops to below the cycle sets temperature of solar heat collection, energy storage device, solar energy heat collector middle heat photosensitive elements detected temperatures often declines 5 DEG C and turns accumulation of energy rate-of flow 5% down.
5. the control method of solar thermal power plants according to claim 2, it is characterized in that: the cycle sets temperature of described solar heat collection, energy storage device is 200 ~ 250 degrees Celsius, the output temperature scope 380 ~ 400 degrees Celsius of solar heat collection, energy storage device setting, high temperature energy-storage tank design temperature is 380 ~ 400 degrees Celsius, thermostatic tank setting operating temperature range is 150 ~ 200 degrees Celsius, and steam generator operating pressure setting value is between 2 ~ 4 MPas.
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| TWM469450U (en) * | 2013-01-21 | 2014-01-01 | Huang-Han Chen | Condensing rack |
| CN105371258A (en) * | 2015-11-06 | 2016-03-02 | 海宁光泰太阳能工业有限公司 | Solar steam generation device |
| CN108223316A (en) * | 2017-12-06 | 2018-06-29 | 苏州绿豆豆智能装备科技有限公司 | A kind of high temperature energy-storage system |
| CN110108049B (en) * | 2019-06-06 | 2023-11-21 | 中国能源建设集团陕西省电力设计院有限公司 | Device and method for measuring spot energy and heat flux density of solar concentrator |
| CN115247953A (en) * | 2020-11-07 | 2022-10-28 | 云南师范大学 | High-efficiency coupling heat exchange drying system of solar heat pump |
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