CN203081667U - Solar and fossil fueled plant complemental circulating device - Google Patents
Solar and fossil fueled plant complemental circulating device Download PDFInfo
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- CN203081667U CN203081667U CN2013200681314U CN201320068131U CN203081667U CN 203081667 U CN203081667 U CN 203081667U CN 2013200681314 U CN2013200681314 U CN 2013200681314U CN 201320068131 U CN201320068131 U CN 201320068131U CN 203081667 U CN203081667 U CN 203081667U
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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 utility model discloses a solar and fossil fueled plant complemental circulating device, and belongs to the field of solar heat utilization. The solar and fossil fueled plant complemental circulating device is characterized in that a combined cycle mode composed of a fossil fuel thermodynamic system and a solar thermodynamic system is adopted, the solar thermodynamic system adopts a closed cycle of a belt heat storage device, and the solar thermodynamic system and the boiler of the fossil fuel thermodynamic system can carry out feedwater heat exchange; a heat exchanging device of heat exchange is connected in series with a boiler feedwater heating device of the fossil fuel thermodynamic system, when solar irradiation is lower, a working medium firstly enters the heat storage device so as to be stored, when the requirements are met, and the working medium enters the heat exchanging device so as to exchange heat with the feedwater of the boiler; and when solar irradiation is reduced until the lowest cycling requirement can not be met, and the working medium is fully remained in the solar thermodynamic system. The solar and fossil fueled plant complemental circulating device provided by the utility model has the advantages that the efficient utilization time of solar energy is improved, the solar optothermal side utilization efficiency is higher, and the safety and implement operation of a fossil fuel unit are realized.
Description
Technical field
The utility model belongs to solar energy heat utilization field.
Background technique
Because solar energy has characteristics such as intermittent and uncertainty, the power station of employing solar light-heat power-generation technology needs to adopt the mode with fossil fuel combined cycle or dependence heat accumulation to guarantee the stable operation in photo-thermal power station usually.At present, solar energy and fossil fuel combined cycle mode are carried out usually as follows: with the one-level heating plant of solar energy optical-thermal system as whole power station, as the solar time, working medium is earlier through heating up solar heater, enter into fossil-fuel boiler again and continue heat temperature raising, enter steam turbine acting generating then, when there not being the solar time, then cut away solar energy and all adopt the fossil fuel generating, this combined cycle mode is referred to as the complemental power-generation mode usually.In the actual motion of solar energy and fossil-fuelled power plant; there is the not high problem of solar energy optical-thermal side utilization ratio; and; usually can rise and fall because tackle the bigger fluctuation of solar energy optical-thermal system owing to reasons such as sun sunshine duration every day finiteness, intensity of sunshine unstability and uncontrollability cause the equipment such as fossil-fuelled power plant boiler in the combined cycle system; and system regulates frequently, has problems such as Security.
Conventional complementary cycle mode as shown in Figure 1.In order to guarantee the quick adjustment of fossil fuel unit, common and fuel oil or gas-fired station complementary operation are because the wave properties and the uncontrollability of solar energy make this design proposal difficulty in actual items have operability in the conventional complementary scheme; Because the fossil fuel unit has certain restriction to mending the solar power of going into, when the low power of mending the fossil fuel unit of solar radiation can not satisfy minimum requirements, the solar energy side can not be utilized, when solar radiant energy was gone into power above the highest benefit, this moment, these solar energy just were wasted.Be in operation simultaneously, conventional solar-powered thermal system resumes operation from being cooled to fully, for the thermal stress of avoiding the heavy wall thermal device excessive, its rate of heating is slow, make the solar-powered thermal system start-up time increase, reduced operational use time, be unfavorable for improving the solar energy utilization ratio.
The model utility content
The purpose of this utility model is: propose a kind of operational use time that can improve solar energy, solar energy optical-thermal side efficient is higher, can satisfy safe, the solar energy and the fossil-fuelled power plant complementary cycle device that can implement to move of fossil fuel unit.
The utility model purpose realizes by following technical proposals:
A kind of solar energy and fossil-fuelled power plant complementary cycle device, form by fossil fuel thermodynamic system and solar-powered thermal system, the closed cycle of described solar-powered thermal system's employing band heat-storing device and heat accumulation control set for adjusting thereof, and with the boiler feed water heat exchange of fossil fuel thermodynamic system, this heat-exchanger rig that carries out heat exchange is connected with the boiler feed water heating equipment of fossil fuel thermodynamic system.
As optimal way, described solar-powered thermal system comprises solar heat absorber, heat-storing device and heat-exchanger rig, working medium constitutes closed cycle along solar heat absorber, heat-storing device and heat-exchanger rig direction in it, described heat accumulation control set for adjusting is the heat-storing device automatic regulating valve of being located between described heat-storing device and described solar heat absorber, the heat-exchanger rig, the boiler feed water heat exchange of described heat-exchanger rig and fossil fuel thermodynamic system.
As optimal way, described solar-powered thermal system also is included as the solar energy condenser lens field that described solar heat absorber provides solar radiation, also be provided with solar energy closed cycle water tank between described solar heat absorber and the heat-exchanger rig, it is communicated with described solar heat absorber by the solar heat absorber feed water pump.
As optimal way, described solar-powered thermal system also comprises daily water tank and solar energy oxygen-eliminating device, and described daily water tank is communicated with described solar energy closed cycle water tank by the closed cycle small pump through described solar energy oxygen-eliminating device.
As optimal way, described heat-storing device is a steam accumulator.
The solar energy that the application adopts and the combined cycle mode of fossil-fuelled power plant are improved by the structure and the method for operation to the solar-powered thermal system, consider the influence of fossil-fuel boiler, steam turbine, adopted the aforementioned techniques scheme factors such as the requirement of solar energy thermal parameter and himself control characteristics:
In order original fossil-fuelled power plant not to be exerted an influence and effectively to utilize the solar energy of collecting as far as possible, whole solar-powered thermal system is in parallel with the boiler feed water heating system of fossil fuel thermodynamic system, the boiler feed water heating equipment cascaded structure design of solar-powered thermal system heat-exchanger rig and fossil fuel thermodynamic system, when utilizing the solar energy heating boiler feed water, the original heating equipment of boiler is only as the boiler feed water path, when utilizing the feedwater of fossil fuel heating boiler, solar heat exchanger is only as the boiler feed water path, so just avoided two kinds of mode of heatings equipment to be produced thermal shock and hurtful danger when the switchover operation, and be closed cycle with the solar-powered thermal system design, when do not have solar radiation evening, not with the working medium emptying in the solar-powered thermal system heat power equipment, but hold it in the heat power equipment, can begin hot or very hot startup according to the parameter situation when starting next time.In most a couple of days in 1 year, the solar-powered thermal system all possesses the hot starting, hot start condition owing to have good insulating power, can improve the effective run time of solar-powered thermal system so greatly.Simultaneously, adopt the solar-powered thermal system of band heat-storing device, when the solar-powered thermal system loading is low, the high temperature refrigerant that the solar-powered thermal system produces is introduced in the heat-storing device standby, the load of solar-powered thermal system is raised to and is sent in the fossil fuel thermodynamic system when higher, this moment, heat-storing device then played buffer function to the fluctuation parameter working medium that solar energy produces, the solar-powered thermal system can be the stable high temperature refrigerant of fossil fuel unit output, avoid the frequent adjusting of fossil fuel unit, also guaranteed its safety and enforceable operation.When solar radiation is reduced to can not satisfy the requirement of solar heat absorber minimum load and even not have radiation fully evening the time, the solar-powered thermal system stops to the fossil fuel unit for high temperature refrigerant, and solar-powered thermal system all devices is stopped transport standby.Between this standby period, the heavy wall heat power equipment of solar-powered thermal system is full of high temperature refrigerant, utilize its good insulation in starting next time, significantly to shorten starting time, can improve the operational use time of solar energy side so greatly.Simultaneously, the thermal shock that heating surface produced to not being incubated when starting in order to reduce, start preceding by the heat absorber heating surface being carried out " dry combustion method " preheating, because no working medium in the heating surface, the heating surface tube wall is thinner, and can reach temperature required in very short time does not have and can produce excess loss to its life-span.
The beneficial effects of the utility model: the utility model organically combines this clean energy resource of solar energy and the power station that utilizes fossil energy to act as a fuel, solar-powered thermal system design, operation and with the fossil fuel thermodynamic system structural design and the method for operation on innovate, by innovation, can improve the operational use time of solar energy on the one hand to the solar-powered thermal system operation mode; On the other hand by innovation to the solar-powered thermal system operation mode that inserts fossil-fuelled power plant, can satisfy the fossil fuel unit safe, can implement operation; Adopt this enforceable technological scheme, has following beneficial effect: the consumption that can effectively reduce fossil fuel, the huge heat reservoir that can replace the photo-thermal power station, reduce power station investment and operation maintenance difficulty, avoid of the thermal shock of solar energy and fossil fuel heating boiler feedwater dual mode switchover operation, can effectively reduce the solar thermal utilization cost with facility such as fossil-fuelled power plant utility generation unit to device.
1, solve in the solar light-heat power-generation technology since the intermittence of solar energy, uncontrollability to main equipment Influence on security such as fossil-fuelled power plant boiler, steam turbine;
2, solve operation that energy storage modes such as adopting fused salt in the solar light-heat power-generation technology caused, safeguard the problem that the aspect exists, directly adopt steam heat accumulation mode, arranged with solar energy replenishing the solar time as fossil-fuelled power plant, do not have the solar time to adopt the fossil fuel generating, be equivalent to utilize the fossil fuel energy storage;
Switching when 3, solving the operation of solar energy optical-thermal and fossil-fuelled power plant causes problems such as thermal shock to equipment;
4, solve pure solar energy cogeneration power plant in operation maintenance that does not have the solar time and dispatching of power netwoks problem;
5, solve the short problem of solar energy optical-thermal operational use time;
6, solve the problem that the fossil fuel unit is frequently regulated because of the variation of solar radiant energy.
Description of drawings
Fig. 1 is the one type of prior art syringe schematic flow sheet;
Fig. 2 is the utility model embodiment's a device schematic flow sheet;
Wherein fossil-fuel boiler 1, steam turbine 2, generator 3, solar energy oxygen-eliminating device 4, daily water tank 5, solar energy condenser lens field 6, solar heat absorber 7, solar energy closed cycle water tank 8, steam accumulator 9, solar heat exchanger 10, solar heat absorber feed water pump 11, closed cycle small pump 12, steam accumulator automatic regulating valve 13, gas turbine 21, steam turbine 22, expansion drum 23, vaporizer 24, oxygen-eliminating device 25, lowly add 26, vapour condenser 27.
Embodiment
Following non-limiting examples is used to illustrate the utility model.
As shown in Figure 2, a kind of solar energy and fossil-fuelled power plant complementary cycle device, form by fossil fuel thermodynamic system and solar-powered thermal system, whole solar-powered thermal system is in parallel with the boiler feed water heating system of fossil fuel thermodynamic system, the solar-powered thermal system adopts the closed cycle of band heat-storing device (preferred steam accumulator 9) and heat accumulation control set for adjusting thereof, and with the boiler feed water heat exchange of fossil fuel thermodynamic system, this heat-exchanger rig (preferred solar heat exchanger 10) that carries out heat exchange is connected with the boiler feed water heating equipment of fossil fuel thermodynamic system.The main fossil-fuel boiler 1 of whole system, steam turbine 2, generator 3, solar energy oxygen-eliminating device 4, daily water tank 5, solar energy condenser lens field 6(comprise slot type or tower type solar condenser), the equipment of several keys such as solar heat absorber 7, solar energy closed cycle water tank 8, steam accumulator 9, solar heat exchanger 10, solar heat absorber feed water pump 11, closed cycle small pump 12, steam accumulator automatic regulating valve 13 forms.The solar-powered thermal system comprises solar heat absorber 7, heat-storing device (steam accumulator 9), heat-exchanger rig (solar heat exchanger 10), daily water tank 5 and solar energy oxygen-eliminating device 4, and the solar energy condenser lens field 6 that solar radiation is provided for solar heat absorber 7, also be provided with solar energy closed cycle water tank 8 between solar heat absorber 7 and the solar heat exchanger 10, it is communicated with solar heat absorber 7 by solar heat absorber feed water pump 11.Daily water tank 5 is communicated with solar energy closed cycle water tank 8 by closed cycle small pump 12 through solar energy oxygen-eliminating device 4.Working medium constitutes closed cycle along solar heat absorber 7, steam accumulator 9 and solar heat exchanger 10 directions in the solar-powered thermal system, the heat accumulation control set for adjusting is the steam accumulator automatic regulating valve of being located between steam accumulator 9 and solar heat absorber 7, the solar heat exchanger 10 13, the boiler feed water heat exchange of solar heat exchanger 10 and fossil fuel thermodynamic system.As shown in Figure 2, replace the original feed water preheater of fossil fuel unit, according to solar radiant energy intensity and system's service condition, can substitute one or more feed water preheater simultaneously, realize step adjusting the solar-powered thermal system power that enters the fossil fuel unit.
The method of solar energy and fossil-fuelled power plant complementary cycle, the combined cycle mode that employing is made up of fossil fuel thermodynamic system and solar-powered thermal system, the solar-powered thermal system adopts the closed cycle of carrying vapour thermal accumulator 9, and with the boiler feed water heat exchange of fossil fuel thermodynamic system, this solar heat exchanger 10 that carries out heat exchange is connected with the boiler feed water heating equipment of fossil fuel thermodynamic system.At first low-density solar radiant energy is collected by solar energy condenser lens field 6, pool highdensity radiation energy, the high density solar radiant energy is converted to the heat energy of working fluid for solar energy by solar heat absorber 7, when the low solar-powered thermal system of solar radiation mends power into the fossil fuel thermodynamic system and can not satisfy minimum requirements, the intrasystem whole working medium of solar-powered thermal are introduced into steam accumulator 9 and store, when treating that solar radiation meets the demands, working medium enters the boiler feed water heat exchange of solar heat exchanger 10 and fossil fuel thermodynamic system again, solar energy side working medium after the release heat is got back in the solar energy closed cycle water tank 8 and by solar energy feed water pump 11 working medium is delivered to continuation absorption solar radiant energy in the solar heat absorber 7, when solar energy side closed circulation system working medium reduces owing to reasons such as blowdown or evaporations, be stored in soft water in the daily water tank 5 through chemical deoxidization water tank 4, small pump 12 enters into closed cycle water tank 8 and carries out moisturizing.
When the higher solar-powered thermal of solar radiation system mended power into the fossil fuel thermodynamic system and can satisfy minimum requirements, the intrasystem whole working medium of solar-powered thermal entered the boiler feed water heat exchange of solar heat exchanger 10 and fossil fuel thermodynamic system after steam accumulator 9 bufferings;
When solar radiation too the high solar thermodynamic system mend when surpassing peak demand into the power of fossil fuel thermodynamic system, the intrasystem part working medium of solar-powered thermal is held back storage by steam accumulator 9, and all the other working medium enter the boiler feed water heat exchange of solar heat exchanger 10 and fossil fuel thermodynamic system through steam accumulator 9;
When solar radiation is reduced to the solar-powered thermal system can not satisfy minimum circulation and require the time, solar-powered thermal system all devices is stopped transport standby, and between this standby period, working medium all is retained in the solar-powered thermal system, preferred working medium all keeps and fills with in the heavy wall heat power equipment of solar-powered thermal system, be in the equipment such as drum, solar energy closed cycle water tank 8, steam accumulator 9 of solar heat absorber 7, solar-powered thermal system restart after solar radiation satisfies minimum circulation requirement.Specific operation are, being reduced to the solar-powered thermal system at solar radiation can not satisfy before minimum circulation requires, heat-storing device begins to hold back part working medium, make solar radiation be reduced to the solar-powered thermal system can not satisfy minimum circulation and require the time, filled with working medium in the heavy wall heat power equipment of solar-powered thermal system.Simultaneously, the thermal shock that heating surface produced to not being incubated when starting in order to reduce, carry out " dry combustion method " preheating by heating surface before starting to solar heat absorber 7, because no working medium (working medium is full of drum) in the heating surface, the heating surface tube wall is thinner, and can reach temperature required in very short time does not have and can produce excess loss to its life-span.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. solar energy and fossil-fuelled power plant complementary cycle device, form by fossil fuel thermodynamic system and solar-powered thermal system, it is characterized in that: the closed cycle of described solar-powered thermal system's employing band heat-storing device and heat accumulation control set for adjusting thereof, and with the boiler feed water heat exchange of fossil fuel thermodynamic system, this heat-exchanger rig that carries out heat exchange is connected with the boiler feed water heating equipment of fossil fuel thermodynamic system.
2. solar energy as claimed in claim 1 and fossil-fuelled power plant complementary cycle device, it is characterized in that: described solar-powered thermal system comprises solar heat absorber, heat-storing device and heat-exchanger rig, working medium constitutes closed cycle along solar heat absorber, heat-storing device and heat-exchanger rig direction in it, described heat accumulation control set for adjusting is the heat-storing device automatic regulating valve of being located between described heat-storing device and described solar heat absorber, the heat-exchanger rig, the boiler feed water heat exchange of described heat-exchanger rig and fossil fuel thermodynamic system.
3. solar energy as claimed in claim 2 and fossil-fuelled power plant complementary cycle device, it is characterized in that: described solar-powered thermal system also is included as the solar energy condenser lens field that described solar heat absorber provides solar radiation, also be provided with solar energy closed cycle water tank between described solar heat absorber and the heat-exchanger rig, it is communicated with described solar heat absorber by the solar heat absorber feed water pump.
4. solar energy as claimed in claim 3 and fossil-fuelled power plant complementary cycle device, it is characterized in that: described solar-powered thermal system also comprises daily water tank and solar energy oxygen-eliminating device, described daily water tank is communicated with described solar energy closed cycle water tank by the closed cycle small pump through described solar energy oxygen-eliminating device.
5. solar energy described in arbitrary claim in the claim 1 to 4 and fossil-fuelled power plant complementary cycle device, it is characterized in that: described heat-storing device is a steam accumulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013200681314U CN203081667U (en) | 2013-02-06 | 2013-02-06 | Solar and fossil fueled plant complemental circulating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013200681314U CN203081667U (en) | 2013-02-06 | 2013-02-06 | Solar and fossil fueled plant complemental circulating device |
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| CN203081667U true CN203081667U (en) | 2013-07-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089558A (en) * | 2013-02-06 | 2013-05-08 | 东方电气集团东方锅炉股份有限公司 | Method and device for solar energy and fossil fuel power station complementary circulation |
| CN103604108A (en) * | 2013-10-22 | 2014-02-26 | 浙江大学 | Dual functional heat pump type solar industrial boiler thermodynamic system and method thereof |
| CN108701332A (en) * | 2016-04-07 | 2018-10-23 | 株式会社日立制作所 | The maintenance plan support system of generating unit groups |
-
2013
- 2013-02-06 CN CN2013200681314U patent/CN203081667U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089558A (en) * | 2013-02-06 | 2013-05-08 | 东方电气集团东方锅炉股份有限公司 | Method and device for solar energy and fossil fuel power station complementary circulation |
| CN103604108A (en) * | 2013-10-22 | 2014-02-26 | 浙江大学 | Dual functional heat pump type solar industrial boiler thermodynamic system and method thereof |
| CN103604108B (en) * | 2013-10-22 | 2015-04-29 | 浙江大学 | Dual functional heat pump type solar industrial boiler thermodynamic system and method thereof |
| CN108701332A (en) * | 2016-04-07 | 2018-10-23 | 株式会社日立制作所 | The maintenance plan support system of generating unit groups |
| CN108701332B (en) * | 2016-04-07 | 2022-02-11 | 株式会社日立制作所 | Maintenance schedule support system for power generation unit group |
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Granted publication date: 20130724 |