CN114776394A - Double-circulation steam turbine power generation system - Google Patents
Double-circulation steam turbine power generation system Download PDFInfo
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- CN114776394A CN114776394A CN202210571763.6A CN202210571763A CN114776394A CN 114776394 A CN114776394 A CN 114776394A CN 202210571763 A CN202210571763 A CN 202210571763A CN 114776394 A CN114776394 A CN 114776394A
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- 238000010248 power generation Methods 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 230000009977 dual effect Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000001172 regenerating effect Effects 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 16
- 229910002092 carbon dioxide Inorganic materials 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 8
- 230000005611 electricity Effects 0.000 description 6
- 239000003245 coal Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- General Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to the technical field of thermal power generation systems, in particular to a double-circulation steam turbine power generation system, which comprises: the first circulating pipeline comprises a turbine, a condenser body, a compressor and a heater body which are connected in a circulating manner; the second circulation pipeline comprises a turbine set, a condenser, a multi-stage low-pressure heater, a deaerator, a multi-stage high-pressure heater and an evaporator which are in circulation connection; the low-pressure heater and the high-pressure heater are both arranged in parallel with the liquid side of the condenser body; steam pipelines are communicated among the low-pressure heater, the high-pressure heater, the deaerator and the steam turbine unit, and the hot side of the heater body is installed on the steam pipelines in series. The heat in the steam turbine set is fed through the coupling fit of the first circulating pipeline and the second circulating pipelineThe line is used in a cascade way to reduce the superheat degree of the regenerative air exhaust of the turboset and reduce the heat exchange
Loss, the working capacity and the online electric quantity of the power generation system can be increased, and the energy consumption of the power generation system is reduced.
Description
Technical Field
The invention relates to the technical field of thermal power generation systems, in particular to a double-circulation steam turbine power generation system.
Background
The coal-fired generating set also consumes a large amount of coal resources while providing large-scale electric power guarantee, and simultaneously causes environmental pollution. Therefore, the efficient and clean operation of the coal-fired unit can save precious coal resources, improve the energy conversion and utilization efficiency, reduce the energy cost of thermal power enterprises, improve the environmental quality, reduce the pollution emission and have remarkable social benefits.
The thermodynamic system is used as the core part of a steam turbine unit, and the performance of the thermodynamic system has direct influence on the energy consumption, efficiency, emission and the like of a steam turbine. In the prior art, the superheat degree of the regenerative steam extraction of the steam turbine set is high, the heat exchange temperature difference of an evaporator is large, the heat loss in the heat exchange process is high, and the overall energy consumption of the steam turbine set is increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the energy consumption of the steam turbine set is increased due to higher heat loss in the heat exchange process of the steam turbine set in the prior art, thereby providing a double-circulation steam turbine power generation system.
In order to solve the above technical problem, the present invention provides a dual cycle steam turbine power generation system, including:
the first circulating pipeline comprises a turbine, a condenser body, a compressor and a heater body which are connected in a circulating manner;
the second circulation pipeline comprises a turbine set, a condenser, a multi-stage low-pressure heater, a deaerator, a multi-stage high-pressure heater and an evaporator which are in circulation connection;
the low-pressure heater and the high-pressure heater are both arranged in parallel with the liquid side of the condenser body;
steam pipelines are communicated among the low-pressure heater, the high-pressure heater, the deaerator and the steam turbine unit, and the hot side of the heater body is installed on the steam pipelines in series.
Optionally, the condenser body is sequentially provided with multiple stages in series, a liquid side inlet end of the final-stage condenser body is communicated with the condenser, and a liquid side outlet end of the final-stage condenser body is communicated with an outlet end of the first-stage low-pressure heater.
Optionally, the liquid side inlet end of the first-stage condenser body is communicated with the outlet end of a certain high-pressure heater, and the liquid side outlet end of the first-stage condenser body is communicated with the inlet end of the last-stage high-pressure heater.
Optionally, the heater bodies are installed in series with multiple stages, and the hot side of one group of heater bodies is communicated with at least one steam pipeline.
Optionally, a first drain pipeline is communicated between the next-stage high-pressure heater and the previous-stage high-pressure heater, and a second drain pipeline is communicated between the first-stage high-pressure heater and the deaerator.
Optionally, a third drain pipeline is communicated between the next-stage low-pressure heater and the previous-stage low-pressure heater, and a fourth drain pipeline is communicated between the first-stage low-pressure heater and the condenser.
Optionally, a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder are installed in the steam turbine unit, steam pipelines are communicated among the intermediate-pressure cylinder, the final-stage low-pressure heater, the deaerator and the primary-stage high-pressure heater, and heater bodies are installed on the steam pipelines communicated with the intermediate-pressure cylinder in series.
Optionally, the high-pressure cylinder is communicated with a plurality of steam pipelines, and the steam pipelines communicated with the high-pressure cylinder are communicated with the multi-stage high-pressure heaters except the first stage in a one-to-one correspondence manner.
Optionally, the low pressure cylinder is communicated with a plurality of steam pipelines, and the steam pipelines communicated with the low pressure cylinder are communicated with the multi-stage low pressure heaters except the final stage in a one-to-one correspondence manner.
Optionally, a heater body is mounted on a steam line in communication with the low pressure cylinder.
The technical scheme of the invention has the following advantages:
1. the invention provides a double-circulation steam turbine power generation system, which comprises: the first circulating pipeline comprises a turbine, a condenser body, a compressor and a heater body which are connected in a circulating manner; the second circulation pipeline comprises a turbine set, a condenser, a multi-stage low-pressure heater, a deaerator, a multi-stage high-pressure heater and an evaporator which are in circulation connection; the low-pressure heater and the high-pressure heater are both arranged in parallel with the liquid side of the condenser body; steam pipelines are communicated among the low-pressure heater, the high-pressure heater, the deaerator and the steam turbine unit, and the hot sides of the heater bodies are installed on the steam pipelines in series.
The first circulation pipeline is used as a Brayton cycle, and the second circulation pipeline is used as a power generation pipeline. When the double-circulation steam turbine power generation system performs power generation, steam drives a steam turbine unit to rotate to generate power, the steam discharged from a steam turbine is condensed into liquid through a condenser and then is input into a multi-stage low-pressure heater to be heated up through low-pressure heating step by step, and then is input into a multi-stage high-pressure heater to be heated up through high-pressure heating step by step after being subjected to heat exchange and deoxidization through a deaerator, and then is changed into steam through an evaporator to be input into the steam turbine unit again. The liquid side of the condenser body is arranged on the low-pressure heater and the high-pressure heater in parallel to convey the heat in the condenser body to the low-pressure heater and the high-pressure heaterHeating the liquid in the pressure heater and the high-pressure heater, and simultaneously cooling the gas at the gas side in the condenser; meanwhile, steam pipelines are arranged among the low-pressure heater, the high-pressure heater, the deaerator and the steam turbine unit, the heater bodies in the first circulating pipeline are installed on the steam pipelines in series, heat is absorbed from the steam pipelines, and the medium in the first circulating pipeline is heated and heated. The first circulation pipeline and the second circulation pipeline are coupled and matched, and the heat in the steam turbine set is utilized in a cascade mode through the low-pressure heater, the high-pressure heater and the heater body, so that the back heating and air exhaust superheat degree of the steam turbine set is reduced, and the heat exchange is reduced
And meanwhile, the turbine in the first circulation loop and the turbine unit in the second circulation loop can drive the generator to output electric energy outwards, so that the working capacity and the online electric quantity of the power generation system can be increased, and the energy consumption of the power generation system is reduced.
2. According to the double-circulation steam turbine power generation system provided by the invention, the condenser bodies are sequentially connected in series to form multiple stages, the liquid side inlet end of the final-stage condenser body is communicated with the condenser, and the liquid side outlet end of the final-stage condenser body is communicated with the outlet end of the first-stage low-pressure heater. Through setting up the multistage condenser body, utilize the multistage condenser body respectively with different high pressure feed water heater or low pressure feed water heater intercommunication for the exit temperature of different condenser bodies and the exit temperature phase-match of high pressure feed water heater or low pressure feed water heater that correspond promote the heat exchange efficiency between condenser body and low pressure feed water heater or the high pressure feed water heater.
3. The invention provides a double-circulation steam turbine power generation system.A plurality of stages are arranged in series on a heater body, and the hot side of one group of heater bodies is connected with at least one steam pipeline in series. Utilize the heater body of multistage series connection and steam line cooperation to establish ties, absorb the heat in the steam line, heat up step by step to the medium in the first circulation pipeline, make simultaneously through steam line carry high pressure heater or low pressure feed water heater's steam temperature and the inside temperature phase-match of high pressure feed water heater or low pressure feed water heater who corresponds to improve heat exchange efficiency, carry out make full use of to the unnecessary heat in the turboset.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a diagram of a dual cycle steam turbine power generation system in accordance with an embodiment of the present invention.
Description of reference numerals: 1. a high pressure cylinder; 2. an intermediate pressure cylinder; 3. a low pressure cylinder; 4. a generator; 5. a condenser; 6. a condensate pump; 7. a low-pressure heater; 8. a deaerator; 9. a feed pump; 10. a high pressure heater; 11. an evaporator; 12. a turbine; 13. a condenser body; 14. a compressor; 15. a heater body.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
As shown in fig. 1, the dual-cycle steam turbine power generation system provided in this embodiment includes: a first circulation line serving as a brayton cycle and a second circulation line serving as a power generation cycle.
The first circulation line includes a turbine 12, a condenser body 13, a compressor 14, and a heater body 15, which are connected in a circulation manner. The second circulation pipeline comprises a turbine set, a condenser 5, a condensate pump 6, a four-stage low-pressure heater 7, a deaerator 8, a water feed pump 9, a three-stage high-pressure heater 10 and a boiler serving as an evaporator 11, wherein the turbine set, the condenser 5, the condensate pump 6, the four-stage low-pressure heater, the deaerator and the water feed pump are connected in series in sequence. Both the low pressure heater 7 and the high pressure heater 10 are arranged in parallel with the liquid side of the condenser body 13. Steam pipelines are communicated between the low-pressure heater 7, the high-pressure heater 10 and the deaerator 8 and the steam turbine unit, and the hot side of the heater body 15 is installed on the steam pipelines in series. A first drainage pipeline is communicated between the next-stage high-pressure heater 10 and the previous-stage high-pressure heater 10, and a second drainage pipeline is communicated between the first-stage high-pressure heater 10 and the deaerator 8. A third drain pipeline is communicated between the next-stage low-pressure heater 7 and the previous-stage low-pressure heater 7, and a fourth drain pipeline is communicated between the first-stage low-pressure heater 7 and the condenser 5.
The condenser body 13 is sequentially provided with a plurality of stages in series, the liquid side inlet end of the final-stage condenser body 13 is communicated with the condenser 5, and the liquid side outlet end of the final-stage condenser body 13 is communicated with the outlet end of the first-stage low-pressure heater 7. The liquid side inlet end of the first-stage condenser body 13 is communicated with the outlet end of a certain high-pressure heater 10, and the liquid side outlet end of the first-stage condenser body 13 is communicated with the inlet end of the last-stage high-pressure heater 10. Specifically, the condenser body 13 is provided with four stages in series, condensed water flowing out from the outlet end of the condensed water pump 6 is divided into two streams, one stream directly enters the low-pressure heater 7 of the first stage, and the other stream enters the liquid side of the condenser body 13 of the fourth stage to be heated and then is merged into the outlet end of the low-pressure heater 7 of the first stage. The condensed water output from the second-stage low-pressure heater 7 is heated by the third condenser body 13 and then is merged into the outlet end of the third-stage low-pressure heater 7. The condensed water output from the outlet of the fourth-stage low-pressure heater 7 directly enters the deaerator 8 after being heated by the liquid side of the second-stage condenser body 13. The inlet end of the first-stage condenser body 13 is communicated with the outlet end of the first-stage high-pressure heater 10, the outlet end of the first-stage condenser body 13 is merged into the outlet end of the second-stage high-pressure heater 10, and the output feed water enters the third-stage high-pressure heater 10.
The steam turbine set is internally provided with a high-pressure cylinder 1, an intermediate-pressure cylinder 2 and a low-pressure cylinder 3, steam pipelines are communicated between the intermediate-pressure cylinder 2 and a final-stage low-pressure heater 7, between the deaerator 8 and between the intermediate-pressure cylinder and a primary-stage high-pressure heater 10, and heater bodies 15 are installed on the steam pipelines communicated with the intermediate-pressure cylinder 2 in series. The high-pressure cylinder 1 is communicated with a plurality of steam pipelines, and the steam pipelines communicated with the high-pressure cylinder 1 are communicated with the multi-stage high-pressure heaters 10 except the first stage in a one-to-one correspondence manner. The low pressure cylinder 3 is communicated with a plurality of steam pipelines, and the steam pipelines communicated with the low pressure cylinder 3 are communicated with the multistage low pressure heaters 7 except the final stage in a one-to-one correspondence manner. And a heater body 15 is arranged in series on one steam pipeline communicated with the low-pressure cylinder 3. The heater bodies 15 are installed in series with multiple stages, and the hot side of one group of heater bodies 15 is connected in series with at least one steam pipeline. Specifically, the heater body 15 is provided with four stages in series, and a steam pipeline is correspondingly connected in series to the hot side of each stage of the heater body 15. Two steam pipelines are communicated with the high-pressure cylinder 1 and are respectively communicated with the third-stage high-pressure heater 10 and the second-stage high-pressure heater 10. The intermediate pressure cylinder 2 is communicated with three steam pipelines which are respectively communicated with a high-pressure heater 10 of the first stage, a deaerator 8 and a low-pressure heater 7 of the fourth stage. Three steam pipelines communicated with the intermediate pressure cylinder 2 are all provided with a heater body 15 in series. The low pressure cylinder 3 is communicated with three steam pipelines which are respectively communicated with the first-stage low pressure heater 7, the second-stage low pressure heater 7 and the third-stage low pressure heater 7, wherein a heater body 15 is arranged on the steam pipeline between the third-stage low pressure heater 7 and the low pressure cylinder 3.
In this embodiment, the medium in the first circulation line is carbon dioxide, and the medium in the second circulation line is liquid water and steam. The steam heated by the evaporator 11 in the second circulation pipeline enters the high pressure cylinder 1, then returns to the evaporator 11 again, is heated for the second time, and then enters the intermediate pressure cylinder 2 and the low pressure cylinder 3 to drive the steam turbine set to operate, and drive the generator 4 to generate electricity. The high pressure cylinder 1, the intermediate pressure cylinder 2, the low pressure cylinder 3, and the generator 4 are coaxially connected. Steam from low pressure jar 3 output is the condensate water through condenser 5 condensation, inputs the low pressure feed water heater 7 of level four series connection through condensate pump 6, then gets into second grade condenser body 13 heat transfer after, enters into oxygen-eliminating device 8 and carries out the deoxidization operation and then inputs the high pressure feed water heater 10 of level three series connection through feed pump 9, finally returns to evaporimeter 11 and accomplishes the circulation. A steam pipeline is arranged between the high-pressure cylinder 1 and the third-stage high-pressure heater 10 and between the high-pressure cylinder 1 and the second-stage high-pressure heater 10, so that the heat of the steam in the high-pressure cylinder 1 is utilized in the feed water; a steam pipeline is communicated among the intermediate pressure cylinder 2, the first-stage high-pressure heater 10, the deaerator 8 and the fourth-stage low-pressure heater 7 so as to utilize heat in steam in the intermediate pressure cylinder 2 in feed water and condensed water; steam pipelines are communicated among the low-pressure cylinder 3 and the first-stage low-pressure heater 7, the second-stage low-pressure heater 7 and the third-stage low-pressure heater 7 so as to utilize heat of steam in the low-pressure cylinder 3 in the condensed water. In the first circulation pipeline, the high-temperature carbon dioxide output from the turbine 12 enters the four-stage series condenser body 13 for cooling, then enters the compressor 14 for compression, the compressed high-pressure carbon dioxide is further heated by the four-stage series heater body 15 and then is conveyed to the turbine 12 to drive the turbine 12 to rotate, and the carbon dioxide output from the turbine 12 is input into the condenser body 13 again to complete circulation.
The hot sides of the four heater bodies 15 in the first circulation pipeline are respectively arranged on different steam pipelines, and heat is taken from the steam pipelines to heat the carbon dioxide. The four-stage condenser body 13 in the first circulation pipeline is connected with the two ends of the first-stage low-pressure heater 7 in parallel, the second-stage condenser body 13 is connected with the two ends of the third-stage low-pressure heater 7 in parallel, the third-stage condenser body 13 is connected between the fourth-stage low-pressure heater 7 and the deaerator 8 in series, and the fourth-stage condenser body 13 is connected with the two ends of the second-stage high-pressure heater 10 in parallel. The condenser body 13 heats the water in the second circulation line to condense and cool the carbon dioxide in the first circulation line. The first circulation pipeline and the second circulation pipeline are used for multi-stage coupling heat exchange, the superheating and supercooling degrees of the regenerative system of the steam turbine are reasonably utilized through carbon dioxide Brayton cycle, the regenerative steam extraction superheating degree can be greatly reduced, the heat exchange temperature difference of the low-pressure heater 7 and the high-pressure heater 10 is reduced, and the heat exchange temperature difference is reduced
And loss, the generator 4 can be coaxially arranged on the turbine in the first circulation pipeline to output electric energy outwards, the exhaust heat of the Brayton turbine is recycled, the work-doing capacity of the steam turbine is increased, the work-doing capacity and the online electric quantity of the system can be increased, and the energy consumption of the steam turbine set is reduced.
The steam pipeline is communicated with the outlet end of the high-pressure heater 10 or the low-pressure heater 7, and the temperature of the steam in the steam pipeline is matched with the temperature of the fluid at the outlet end of the corresponding high-pressure heater 10 or the corresponding low-pressure heater 7. Through optimization, when the Brayton cycle turbine 12 has the steam inlet pressure of 29MPa, the steam exhaust pressure of 8.13MPa and the circulating carbon dioxide amount of 68t/h, the energy consumption of the whole system is the lowest, the corresponding work capacity of the Brayton turbine is 9.16MW, the heat consumption of the system is expected to be reduced by 52kJ/kWh, the power supply coal consumption is reduced by 0.61g/kWh, and the consumption reduction effect is obvious. The turbine 12 in the Brayton cycle generates electricity to be used as station power, the on-line electricity quantity of a unit can be increased, the electricity price is calculated according to 0.4 yuan per degree, the annual utilization hour is calculated according to 4000 hours, and the income of the electricity generation can reach 1001.6 ten thousand yuan for more years (the electricity consumption of the compressor 14 is deducted).
As an alternative embodiment, both the heater body and the condenser body may be multi-channel heat exchangers.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A dual cycle steam turbine power generation system, comprising:
the first circulation pipeline comprises a turbine (12), a condenser body (13), a compressor (14) and a heater body (15) which are connected in a circulation mode;
the second circulating pipeline comprises a turbine set, a condenser (5), a multi-stage low-pressure heater (7), a deaerator (8), a multi-stage high-pressure heater (10) and an evaporator (11) which are connected in a circulating manner;
the low-pressure heater (7) and the high-pressure heater (10) are both arranged in parallel with the liquid side of the condenser body (13);
the low-pressure heater (7), the high-pressure heater (10) and the deaerator (8) with all communicate there is the steam pipe way between the turboset, the hot side series connection of heater body (15) is installed on the steam pipe way.
2. The dual cycle steam turbine power generation system of claim 1, wherein the condenser bodies (13) are sequentially installed in series in a plurality of stages, a liquid side inlet end of the condenser body (13) at the final stage is communicated with the condenser (5), and a liquid side outlet end of the condenser body (13) at the final stage is communicated with an outlet end of the low pressure heater (7) at the first stage.
3. The dual cycle steam turbine power generation system of claim 2, wherein the liquid side inlet of the condenser body (13) of the first stage communicates with an outlet of one of the high pressure heaters (10), and the liquid side outlet of the condenser body (13) of the first stage communicates with an inlet of the high pressure heater (10) of the last stage.
4. A dual cycle steam turbine power generation system according to any one of claims 1 to 3, wherein the heater bodies (15) are mounted in series in a plurality of stages, the hot side of a group of the heater bodies (15) being in communication with at least one of the steam lines.
5. The dual cycle steam turbine power generation system of any one of claims 1 to 3, wherein a first drain line is communicated between the next stage high pressure heater (10) and the previous stage high pressure heater (10), and a second drain line is communicated between the first stage high pressure heater (10) and the deaerator (8).
6. The dual cycle steam turbine power generation system according to any one of claims 1 to 3, wherein a third drain line is communicated between the next stage low pressure heater (7) and the previous stage low pressure heater (7), and a fourth drain line is communicated between the first stage low pressure heater (7) and the condenser (5).
7. The dual cycle steam turbine power generation system of any one of claims 1 to 3, wherein a high pressure cylinder (1), an intermediate pressure cylinder (2) and a low pressure cylinder (3) are installed in the steam turbine unit, the steam pipeline is communicated between the intermediate pressure cylinder (2) and the last low pressure heater (7), the deaerator (8) and the first high pressure heater (10), and the heater body (15) is installed in series on the steam pipeline communicated with the intermediate pressure cylinder (2).
8. The dual cycle steam turbine power generation system of claim 7, wherein the high pressure cylinder (1) is connected to a plurality of steam lines, and the steam lines connected to the high pressure cylinder (1) are connected to the high pressure heaters (10) of different stages other than the first stage in a one-to-one correspondence manner.
9. The dual cycle steam turbine power generation system according to claim 7, wherein a plurality of the steam lines communicate with the low pressure cylinder (3), and the steam lines communicating with the low pressure cylinder (3) communicate with the plurality of stages of the low pressure heaters (7) other than the final stage in a one-to-one correspondence.
10. The dual cycle steam turbine power generation system according to claim 9, wherein the heater body (15) is installed on the steam pipe communicating with the low pressure cylinder (3).
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| CN214741512U (en) * | 2021-03-17 | 2021-11-16 | 西安热工研究院有限公司 | High-pressure air energy storage power generation system coupled with coal electric heat source |
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