CN104912755A - Fresnel type solar photo-thermal and natural gas combined power generating system - Google Patents
Fresnel type solar photo-thermal and natural gas combined power generating system Download PDFInfo
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- CN104912755A CN104912755A CN201510315273.XA CN201510315273A CN104912755A CN 104912755 A CN104912755 A CN 104912755A CN 201510315273 A CN201510315273 A CN 201510315273A CN 104912755 A CN104912755 A CN 104912755A
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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 Fresnel type solar photo-thermal and natural gas combined power generating system. The Fresnel type solar photo-thermal and natural gas combined power generating system comprises a gas turbine power generating system, a waste heat boiler, a Fresnel type solar photo-thermal conversion system and a steam turbine, wherein the steam turbine is connected with a second power generator, a gas turbine smoke discharging system is communicated with a waste heat boiler smoke and afterburning system, the main steam outlet of a waste heat boiler steam-water system is connected with the steam inlet system of the steam turbine, and the replenished water of the whole system directly enters a condenser. The Fresnel type solar photo-thermal and natural gas combined power generating system has the advantages that a natural gas power generating system and a Fresnel type solar photo-thermal power generating system are organically combined to generate power jointly, and steam can be supplied according to needs; the combined power generating system can adjust electric loads to satisfy power supply requirements and relieve power supply pressure, natural gas consumption is reduced, the problem that the Fresnel type solar photo-thermal power generating system is hard to accumulate energy at night is solved, cost is lowered, and overall project economic benefits are increased.
Description
Technical field
The present invention relates to power generation system, particularly relate to a kind of Fresnel solar energy optical-thermal and rock gas combined generating system.
Background technique
Natural gas generating is one of the most stable distributed energy supply mode, and outstanding cold, heat and electricity triple supply power generation system can bring up to more than 95% fuel gas generation efficiency.From World Developed Countries and some country in Southeast Asia's Experience in Developments, development distributed gas power generation system is the only way realizing energy-saving and emission-reduction and energy supply sustainable development, there is efficient, energy-conservation, reduction of discharging, environmental protection, raising energy supply Security, electric power and gas supply peak load shifting and promote the advantage that recycling economy development etc. is numerous, being the irreversible trend of modern energy field development, is energy supply mode most with prospects.
But natural gas resource is the non-renewable energy belonging to easy consumption after all, and natural gas resource neither be inexhaustible, consume so should save to use to reduce as far as possible.This just needs to develop as far as possible and use some reproducible clean energy resourcies be used as substituting of rock gas or supplement, as solar energy, wind energy, geothermal power etc.
Solar energy is a kind of inexhaustible best renewable energy sources that spreads all over the world, but the utilization of solar energy resources also has it to be tied part, wherein maximum is exactly that solar energy only has daytime fine day to utilize by about part, cloudy day and cannot utilize evening, this just causes the discontinuity of using energy source.In order to realize the uninterruptable power generation of solar energy, then need to spend huge financial resources to do the energy-storage system of gigantic project, the equipment of not only energy storage and material are very expensive, but also have the various restriction not easily realized, and realize difficulty larger.As solar energy Fresnel formula power generation system, it is the solar energy system belonging to middle low temperature.Fresnel solar electrical energy generation by the reflection mirror array of multiple row biaxial solar tracing system by solar light focusing on receiver, the solar radiant energy of gathering is converted into heat energy by receiver, and then by thermal energy transfer to thermodynamic cycle heating working medium, driving steam turbine acting generating.Fresnel solar power system has realization and manufactures relatively easy solar energy system, also can not need to utilize certain gas, liquid or fuse salt etc. as intermediate cycle medium, if but will run continuously, still need with materials such as fuse salts as energy-accumulating medium, virtually add energy-storage system and equipment, system complex, engineering is huge, material expensive, power consumption is large.
Summary of the invention
The object of the invention is to, a kind of Fresnel solar energy optical-thermal and rock gas combined generating system are provided, natural gas power system and Fresnel solar light-heat power-generation system are combined, the consumption of natural gas resource can be reduced, cut operating costs, simultaneously, renewable energy solar energy can be effectively utilized generate electricity, and ensure whole system uninterruptable power generation energy supply when Fresnel solar light-heat power-generation system is without the need to arranging costly energy-storage system, with the carbonated drink of reducing every day Unit Commitment bringing and heat loss, extension device working life, improve entire system operational efficiency.
For solving the problems of the technologies described above, the present invention adopts following technological scheme:
A kind of Fresnel solar energy optical-thermal and rock gas combined generating system, comprise gas power generation system, exhaust heat boiler, Fresnel solar energy optical-thermal converting system, steam turbine and the second generator; Steam turbine is connected with the second generator, gas power generation system is connected with the flue gas system of exhaust heat boiler, Turbine Steam water system is connected with the boiler circuit of exhaust heat boiler, and Fresnel solar energy optical-thermal converting system is connected with steam turbine through steam/water circulating passage and exhaust heat boiler.Wherein, Fresnel solar energy optical-thermal converting system adopts water as cycle fluid, saves heat reservoir.Aqueous phase is lower for cost intermediate medium and heat storage material, and more easily obtain, system more simplifies.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, gas power generation system comprises air compressor, firing chamber, gas turbine and the first generator, air compressor, firing chamber are communicated with successively with gas turbine, gas turbine is connected with the first generator, and gas turbine is connected with exhaust-heat boiler flue gas system.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, solar energy optical-thermal converting system is Fresnel.Fresnel solar light-heat power-generation system adopts water to do cycle fluid, does not establish energy-storage system.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, also comprise exhaust heat boiler afterburning system, afterburning system is connected with exhaust heat boiler.Afterburning system is used for, when the sun is not enough or do not have illumination, adopting the mode of rock gas afterburning to meet the demand of cool and thermal power load.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, also comprise exhaust heat boiler afterbody water heating system, exhaust heat boiler afterbody water heating system is positioned at the flue end of exhaust heat boiler.The waste heat of exhaust heat boiler tail flue gas can be utilized by arranging exhaust heat boiler afterbody water heating system fully, the hot water of generation being used for supplying user as domestic hot-water, and exhaust heat boiler temperature of exhaust fume can be reduced.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, exhaust heat boiler afterburning system, steam/water circulating passage and exhaust heat boiler afterbody water heating system are arranged successively along the flue gas exhaust direction of exhaust heat boiler.By the upstream of steam/water circulating channel setting in exhaust heat boiler afterbody water heating system, in order to can by heat centralizedly supply to steam/water circulating passage, and the waste heat of exhaust heat boiler afterbody water heating system just in order to utilize exhaust heat boiler afterbody to discharge fume more fully.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, exhaust heat boiler is provided with drum, and steam/water circulating passage is connected with drum.Its effect produces steam in exhaust heat boiler.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, also comprise oxygen-eliminating device, oxygen-eliminating device is connected with steam/water circulating passage, and its effect is the oxygen in removing working medium, prevent equipment and the oxidized corrosion of pipeline, the working life of extension device and pipe-line system.Meanwhile, heated feed water.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, also comprise vapour condenser, vapour condenser is connected with steam turbine, and vapour condenser is positioned at the downstream of steam turbine.Its effect reduces steam turbine exhaust pressure, improves turbine discharge vacuum, reclaims working medium, ensures the operation normally and efficiently of turbine generating system.
In aforesaid Fresnel solar energy optical-thermal and rock gas combined generating system, also comprise gland heater, gland heater is connected with the shaft seal extract system of steam turbine.Its effect is the heat that recovery turbine shaft seal is bled, and rises the temperature of water of condensation in order to heat-setting water extraction.
Compared with prior art, natural gas power system and Fresnel solar light-heat power-generation system organically combine by the present invention, realize power supply and heat supply continuously, two kinds of energy can be had complementary advantages, and learn from other's strong points to offset one's weaknesses, and run with making the safer economic stability of system, solve the problem of not easily energy storage at Fresnel solar light-heat power-generation system night simultaneously, greatly reduce the investment of energy storage device, reduce input cost, simplify system.This power generation system can continuous high-efficient stable operation throughout the year, thus greatly improve the whole economic efficiency of project.
Fresnel solar energy and rock gas join together to carry out generating electricity and heat supply by the present invention, just compensate for the respective deficiency that this two spike-type cultivars utilizes, to make two spike-type cultivars have complementary advantages, learn from other's strong points to offset one's weaknesses, realize the energy and combine the most perfectly combining of utilization.Fresnel solar power system of the present invention adopts water to be cycle fluid, and without the need to intercycle system and energy-storage system, system is simple, and power consumption is low, and working medium easily obtains.
Usual daytime is the power consumption larger period of relatively concentrating, now, the time that solar energy is more sufficient just, so can make boiler feed water enter solar heating system more, with solar energy substituting or supplementing as rock gas energy, reduce the consumption of rock gas as far as possible.When there is no solar energy or solar energy deficiency to evening or cloudy day, then by the control of system valve, feedwater can be switched to exhaust heat boiler boiler circuit gradually, the deficiency of solar energy is made up with the waste heat of gas turbine and the calory burning of afterburning rock gas, realize uninterruptable power generation and heat supply, to ensure continuously energy supply demand.
Very importantly, this solar energy is combined with rock gas, is under the prerequisite that can ensure whole day uninterruptable power generation energy supply, can arranges the energy-storage systems such as fuse salt, and working medium used is also very simple, only uses a kind of hot aqueous medium the most easily obtained.This solar energy is combined with rock gas, not only greatly simplifie Fresnel solar power system, save engineering investment cost, shorten the engineering construction cycle, decrease the loss of start and stop every day working medium and heat, decrease the power consumption of energy-storage system, extend service life of equipment, save operation and maintenance cost, improve overall operation efficiency, also considerably reduce the consumption of natural gas resource, reduce production and operation cost, the economic benefit improving whole project is extremely important.Meanwhile, this solar energy is combined with rock gas and really achieves energy-saving and emission-reduction, protects environment.Be achieve many things at one stroke, once invest lifelong benefit.
Accompanying drawing explanation
Fig. 1 is the system schematic of a kind of embodiment of the present invention.
Reference character: 1-air compressor, 2-firing chamber, 3-gas turbine, 4-first generator, 5-exhaust heat boiler afterburning system, 6-steam/water circulating passage, 7-Fresnel solar energy optical-thermal converting system, 8-drum, 9-exhaust heat boiler, 10-oxygen-eliminating device, 11-exhaust heat boiler afterbody water heating system, 12-gland heater, 13-vapour condenser, 14-second generator, 15-steam turbine, 16-gas power generation system.
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Embodiment
Embodiments of the invention 1: as shown in Figure 1, a kind of Fresnel solar energy optical-thermal and rock gas combined generating system, comprise gas power generation system 16, exhaust heat boiler 9, Fresnel solar energy optical-thermal converting system 7, steam turbine 15 and the second generator 14; Steam turbine 15 is connected with the second generator 14, gas power generation system 16 is connected with the flue gas system of exhaust heat boiler 9, the boiler circuit of steam turbine 15 is connected with the boiler circuit of exhaust heat boiler 9, and Fresnel solar energy optical-thermal converting system 7 is connected with steam turbine 15 through steam/water circulating passage 6.
Gas power generation system 16 comprises air compressor 1, firing chamber 2, gas turbine 3 and the first generator 4.Air compressor 1, firing chamber 2 are communicated with successively with gas turbine 3, and gas turbine 3 is connected with the first generator 4, and gas turbine 3 is connected with the flue gas system of exhaust heat boiler 9.
Also comprise exhaust heat boiler afterburning system 5, afterburning system 5 is connected with exhaust heat boiler 9.
Also comprise exhaust heat boiler afterbody water heating system 11, exhaust heat boiler afterbody water heating system 11 is arranged on the flue end of exhaust heat boiler 9.
Exhaust heat boiler afterburning system 5, steam/water circulating passage 6 and exhaust heat boiler afterbody water heating system 11 are arranged successively along the flue gas exhaust direction of exhaust heat boiler 9.
Exhaust heat boiler 9 is provided with drum 8, and steam/water circulating passage 6 is connected with drum 8.
Also comprise oxygen-eliminating device 10, oxygen-eliminating device 10 is connected with steam/water circulating passage 6.
Also comprise vapour condenser 13, vapour condenser 13 is connected with steam turbine 15, and vapour condenser 13 is positioned at the downstream of steam turbine 15.
Also comprise gland heater 12, gland heater 12 is connected with the shaft seal pump-line of steam turbine (15).
The working principle of a kind of embodiment of the present invention: the working-medium water of Fresnel solar power system is heated to preset temperature value in Fresnel solar energy optical-thermal converting system 7, enter exhaust heat boiler 9 heat temperature raising, evaporation again, overheatedly become superheated vapor, then enter steam turbine 15 and generate electricity.Meanwhile, natural gas straight taps into and generates electricity into gas turbine 3, and the heat smoke of about 400 ~ 500 DEG C of discharging after gas turbine 3 generates electricity enters exhaust heat boiler 9 again, and water is heated into superheated vapor, and superheated vapor enters steam turbine 15 and generates electricity.When daytime, solar irradiation was more sufficient, as often as possible utilize Fresnel solar energy optical-thermal converting system 7 that working medium feedwater is heated to preset temperature, then the drum of exhaust heat boiler 9 is entered, this working medium mixes with the hot water produced in exhaust heat boiler 9 of discharging fume from gas turbine 3, then heated up further in exhaust heat boiler 9 together, evaporation, overheated after enter steam turbine 15 and generate electricity.After the water of condensation that vapour condenser 13 produces is boosted by condensate pump together with moisturizing, heat up through gland heater and enter the heating of exhaust heat boiler 9 economizer, then enter the oxygen-eliminating device that exhaust heat boiler 9 carries and carry out deoxygenation.Low pressure feed water after deoxygenation is divided into two-way: exhaust heat boiler 9 feed water pump of leading up to boosts, and the heating surface entering exhaust heat boiler 9 inside continues heat temperature raising, then enters the drum 8 of exhaust heat boiler 9; Solar energy system feed water pump of separately leading up to boosts, and enters solar energy optical-thermal converting system and continues heat temperature raising, then enter the drum 8 of exhaust heat boiler 9, and the feedwater after two-part heating mixes in boiler-steam dome.When morning, at dusk, cloudy solar illuminating inadequate time, water portion can be divided down to self water supply system of exhaust heat boiler 9, the Insufficient heating part of solar energy, be supplied by exhaust heat boiler afterburning system 5.When not having solar energy heating completely night, solar energy optical-thermal water supply system of can stopping transport, all adopts gas power generation system 16 and gas complementary combustion system 5 to generate electricity, completely can send out, also can carry out sub load generating according to need for electricity.In order to make full use of the smoke discharging residual heat of exhaust heat boiler 9, reducing temperature of exhaust fume, being provided with back-end surfaces at the afterbody of exhaust heat boiler, produce hot water, can be used for providing domestic hot-water.
Claims (8)
1. a Fresnel solar energy optical-thermal and rock gas combined generating system, it is characterized in that, comprise gas power generation system (16), exhaust heat boiler (9), Fresnel solar energy optical-thermal converting system (7), steam turbine (15) and the second generator (14); Steam turbine (15) is connected with the second generator (14), gas power generation system (16) is connected with the flue gas system of exhaust heat boiler (9), the boiler circuit of steam turbine (15) is connected with the boiler circuit of exhaust heat boiler (9), Fresnel solar energy optical-thermal converting system (7) is connected with steam turbine (15) through steam/water circulating passage (6) and exhaust heat boiler (9), exhaust heat boiler (9) is provided with drum (8), and steam/water circulating passage (6) is connected with drum (8).
2. Fresnel solar energy optical-thermal according to claim 1 and rock gas combined generating system, it is characterized in that, gas power generation system (16) comprises air compressor (1), firing chamber (2), gas turbine (3) and the first generator (4).Air compressor (1), firing chamber (2) are communicated with successively with gas turbine (3), gas turbine (3) is connected with the first generator (4), and gas turbine (3) is connected with the flue gas system of exhaust heat boiler (9).
3. Fresnel solar energy optical-thermal according to claim 2 and rock gas combined generating system, it is characterized in that, also comprise exhaust heat boiler afterburning system (5), exhaust heat boiler afterburning system (5) is connected with exhaust heat boiler (9).
4. Fresnel solar energy optical-thermal according to claim 3 and rock gas combined generating system, it is characterized in that, also comprise exhaust heat boiler afterbody water heating system (11), exhaust heat boiler afterbody water heating system (11) is positioned at the flue end of exhaust heat boiler (9).
5. Fresnel solar energy optical-thermal according to claim 4 and rock gas combined generating system, it is characterized in that, exhaust heat boiler afterburning system (5), steam/water circulating passage (6) and exhaust heat boiler afterbody water heating system (11) are arranged successively along the smoke evacuation direction of exhaust heat boiler (9).
6. Fresnel solar energy optical-thermal according to claim 3 and rock gas combined generating system, is characterized in that, also comprises oxygen-eliminating device (10), and oxygen-eliminating device (10) is connected with steam/water circulating passage (6).
7. Fresnel solar energy optical-thermal according to claim 3 and rock gas combined generating system, it is characterized in that, also comprise vapour condenser (13), vapour condenser (13) is connected with steam turbine (15), and vapour condenser (13) is positioned at the downstream of steam turbine (15).
8. Fresnel solar energy optical-thermal according to claim 3 and rock gas combined generating system, it is characterized in that, also comprise gland heater (12), gland heater (12) is connected with the shaft seal pump-line of steam turbine (15).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958487A (en) * | 2019-03-13 | 2019-07-02 | 华北电力大学 | A kind of steam drive fluid piston formula motion actuators based on photo-thermal effect |
| CN114961908A (en) * | 2022-06-07 | 2022-08-30 | 华能国际电力股份有限公司 | Solar coal-fired coupling power generation system and method |
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Address after: 100160 Beijing, Fengtai District Automobile Museum Road, No. 6, Ying Kun century A block, floor 6 Applicant after: HUADIAN DISTRIBUTED ENERGY ENGINEERING & TECHNOLOGY Co.,Ltd. Applicant after: CHINA HUADIAN ENGINEERING Co.,Ltd. Address before: 100160 Beijing, Fengtai District Automobile Museum Road, No. 6, Ying Kun century A block, floor 6 Applicant before: HUADIAN DISTRIBUTED ENERGY ENGINEERING & TECHNOLOGY Co.,Ltd. Applicant before: China Huadian Engineering (Group) Co.,Ltd. Address after: 100160 Beijing, Fengtai District Automobile Museum Road, No. 6, Ying Kun century A block, floor 6 Applicant after: HUADIAN DISTRIBUTED ENERGY ENGINEERING & TECHNOLOGY Co.,Ltd. Applicant after: China Huadian Engineering (Group) Co.,Ltd. Address before: 100160 Beijing, Fengtai District Automobile Museum Road, No. 6, Ying Kun century A block, floor 11 Applicant before: China Huadian Engineering (Group) Co.,Ltd. Applicant before: HUADIAN DISTRIBUTED ENERGY ENGINEERING & TECHNOLOGY Co.,Ltd. |
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Application publication date: 20150916 |