CN108412563A - Three turbines, three regenerator supercritical carbon dioxide cycle generating system for gas turbine waste heat recovery - Google Patents
Three turbines, three regenerator supercritical carbon dioxide cycle generating system for gas turbine waste heat recovery Download PDFInfo
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- CN108412563A CN108412563A CN201810258181.6A CN201810258181A CN108412563A CN 108412563 A CN108412563 A CN 108412563A CN 201810258181 A CN201810258181 A CN 201810258181A CN 108412563 A CN108412563 A CN 108412563A
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- Prior art keywords
- regenerator
- turbine
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- outlet
- waste heat
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Classifications
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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
- F01K13/00—General layout or general methods of operation of complete plants
-
- 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
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/06—Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
For three turbines, the three regenerator supercritical carbon dioxide cycle generating system of gas turbine waste heat recovery, belong to technical field of energy utilization.The present invention substitutes the working medium such as water vapour, organic matter using cycle fluid, reaches or surmounts existing waste heat recovery level, reduced in volume；Technical essential：Compressor is connected with current divider, current divider is connected with waste heat boiler and cryogenic regenerator, waste heat boiler is connected with high-temperature turbine, high-temperature turbine is connected with high-temperature turbine generator, high temperature regenerator and junction station, medium temperature turbine is connected, medium temperature turbine is connected with medium temperature turbine generators, medium temperature turbine is connected with junction station, medium temperature regenerator and junction station, cryogenic regenerator is connected, medium temperature regenerator is connected with current divider, current divider and high temperature regenerator, low temperature turbine is connected, low temperature turbine is connected with low temperature turbine generators, cryogenic regenerator is connected with cooler, cooler is connected with compressor, compressor is connected with driving motor.The present invention is used for gas turbine heat recovery.
Description
Technical field
The present invention relates to a kind of gas turbine heat recovery carbon dioxide recycle electricity generation systems, and in particular to Yi Zhongyong
In three turbines, the three regenerator supercritical carbon dioxide cycle generating system of gas turbine waste heat recovery, belong to energy utilization technology
Field.
Background technology
The heat to power output of gas turbine is efficient, pollutant emission is few compared with coal unit, is suitable for that economically developed, population is close
Area of collection, including industrial park, new and high-tech development zone, university city etc..Gas turbine is due to working characteristics, outlet
The temperature of flue gas is even higher up to 450~550 DEG C.Therefore, in order to improve the capacity usage ratio of gas turbine unit, in combustion engine
It needs that residual heat using device is arranged at smoke evacuation, generally uses the Rankine cycle mode of water-steam or organic working medium to recycle at present remaining
Heat, residual heat system recycling ability utilization account for three points of combined cycle whole efficiency (efficiency is up to about 60% in unit of restriking)
One of.
The power generation of supercritical carbon dioxide Brayton cycle is considered as the novel of most potential replacement water-steam Rankine cycle
Power generation cycle pattern.It is mainly characterized by using carbon dioxide as working medium and in a supercritical state always in the circulating cycle, working medium can flow
Density is big, takes thermal energy power forces main device volume to have a significant diminution compared with water-steam circulation, while can also be water-saving or being provided in water
The area that source lacks uses.
The arrangement forms such as the simple backheat of existing supercritical carbon dioxide Brayton cycle generally use, shunting recompression, by
It needs to heat by regenerator before working medium enters waste heat boiler, although the efficiency of therrmodynamic system is significantly increased, flue gas smoke evacuation
Temperature drift (more than 100 DEG C), system net power is also relatively low.
Invention content
The brief overview about the present invention is given below, in order to provide about the basic of certain aspects of the invention
Understand.It should be appreciated that this general introduction is not the exhaustive general introduction about the present invention.It is not intended to determine the pass of the present invention
Key or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain concepts in simplified form,
In this, as the preamble in greater detail discussed later.
In consideration of it, the purpose of the present invention is the water-steam industrially used at present using New Cycle refrigerant substitute, organic
The working medium such as object reach or surmount existing waste heat recovery level, and have significant diminution in system bulk, and then provide a kind of
Three turbines, three regenerator supercritical carbon dioxide cycle generating system for gas turbine waste heat recovery.
The scheme taken of the present invention is：The overcritical titanium dioxide of three turbines, three regenerator for gas turbine waste heat recovery
Carbon cycle electricity generation system, including high-temperature turbine, high-temperature turbine generator, high temperature regenerator, medium temperature turbine, medium temperature turbine power generation
Machine, medium temperature regenerator, low temperature turbine, low temperature turbine generators, cryogenic regenerator, compressor, driving motor, cooler, waste heat
Boiler, level-one current divider, two level current divider, level-one junction station and two level junction station；
The compressor outlet is connected with level-one splitter inlet, the outlets A and the exhaust-heat boiler inlet phase of level-one current divider
Even, the outlets B of level-one current divider are connected with the cold-side inlet of cryogenic regenerator, heat boiler outlet and high-temperature turbine entrance phase
Even, the output end of high-temperature turbine is connected with the input terminal of high-temperature turbine generator, the heat of high-temperature turbine outlet and high temperature regenerator
End entrance is connected, and the hot junction outlet of high temperature regenerator is connected with the B entrances of level-one junction station, and high temperature regenerator cold side outlet is in
Warm turbine is connected, and the output end of medium temperature turbine is connected with the input terminal of medium temperature turbine generators, and the outlet of medium temperature turbine converges with level-one
Flow device A entrances be connected, level-one junction station outlet is connected with the hot-side inlet of medium temperature regenerator, medium temperature regenerator hot junction export and
The B entrances of two level junction station are connected, and the cold-side inlet of medium temperature regenerator is connected with the cold side outlet of cryogenic regenerator, medium temperature backheat
Device cold side outlet is connected with two level splitter inlet, and the outlets B of two level current divider are connected with the cold-side inlet of high temperature regenerator, and two
The outlets A of level shunt device are connected with low temperature turbine, and the output end of low temperature turbine is connected with the input terminal of low temperature turbine generators, low
Warm turbine outlet is connected with the A entrances of two level junction station, and the outlet of two level junction station is connected with the hot-side inlet of cryogenic regenerator, low
The hot junction outlet of warm regenerator is connected with cooler, and cooler outlet is connected with suction port of compressor；The input terminal of compressor and drive
The output end of dynamic motor is connected.
Wherein, level-one current divider shunts the working medium by compressor boosting, and part working medium is directly entered waste heat pot
Exhaust gas temperature may be implemented close to 80 DEG C, than the supercritical carbon dioxide circulatory system theory row of simple backheat arrangement in stove
Smoke temperature degree has dropped 20 DEG C.
Wherein, three turbines and three regenerators are arranged, are realized working medium and are carried making full use of for energy, are set using such
Meter can make system actual efficiency (the ratio between system net power and flue gas gross calorific value) reach 22%, than existing afterheat boiler system
Actual efficiency (being less than 20%) higher.For supercritical carbon dioxide turbine is compared to steam turbine, turbine series is less, volume
(theoretical calculation analysis obtains smaller, and 300MW steam turbine shafts are about 20 meters, and equal-wattage grade supercritical carbon dioxide
Turbine rotor axial length is only 1 meter).
Further：The waste heat boiler is supercritical carbon dioxide waste heat boiler, ensures 450~550 DEG C of flue gases of combustion engine
It fully exchanges heat with supercritical carbon dioxide of the pressure between 15~25MPa.
Further：The high temperature regenerator, medium temperature regenerator and cryogenic regenerator are micro-channel heat exchanger, and end difference is small
In 2 DEG C, to having corrosion-resistant, resistance to compression under the conditions of 300~450 DEG C of the high temperature of industrial grade carbon-dioxide, high pressure 7.5MPa~25MPa
Performance.The shell-and-tube heat exchanger used in compared with the prior art, end difference can further reduce (shell-and-tube heat exchanger end difference need
More than 10 DEG C), and under the conditions of identical heat exchange amount, heat exchanger weight is only shell-and-tube 1/7th.
The effect that is reached of the present invention is：
The present invention is heat source feature according to flue-gas temperature, calorific value and opening, devises three turbine supercritical carbon dioxides hair
Electric system, it can be achieved that waste heat boiler exhaust gas temperature close to 80 DEG C, system actual efficiency (system net power and flue gas gross calorific value it
Than) up to 22%.
Description of the drawings
Fig. 1 is that three turbines, the three regenerator supercritical carbon dioxide for gas turbine waste heat recovery of the present invention recycles hair
Electric system structural schematic diagram.
In figure：
11-waste heat boilers；12-high temperature regenerators；13-medium temperature regenerators；14-cryogenic regenerators；15- coolers；
21-high-temperature turbines；22-medium temperature turbines；23-low temperature turbines；24-compressors；31-high-temperature turbine generators；32-medium temperatures
Turbine generators；33-low temperature turbine generators；41-driving motors；51-level-one current dividers；52-two level junction stations；53—
Level-one junction station；54-two level current dividers.
Specific implementation mode
For clarity and conciseness, all features of actual implementation mode are not described in the description.However, should
Understand, much decisions specific to embodiment must be made during developing any this practical embodiments, so as to reality
The objectives of existing developer, for example, meet restrictive condition those of related to system and business, and these restrictive conditions
It may be changed with the difference of embodiment.In addition, it will also be appreciated that although development is likely to be very multiple
It is miscellaneous and time-consuming, but for the those skilled in the art for having benefited from the disclosure of invention, this development is only example
Capable task.
Herein, it is also necessary to which explanation is a bit, in order to avoid having obscured the present invention because of unnecessary details, in application text
It illustrate only the apparatus structure closely related with scheme according to the present invention and/or processing step in part, and be omitted and this
The little other details of inventive relationship.
Embodiment：Referring to Fig. 1, three turbines, three regenerator for gas turbine waste heat recovery of present embodiment is overcritical
Carbon dioxide recycle electricity generation system, the system features are that three turbines is used to generate electricity respectively to realize that the classification of working medium energy is abundant
It utilizes；
Specifically include high-temperature turbine 21, high-temperature turbine generator 31, high temperature regenerator 12, medium temperature turbine 22, medium temperature turbine
Generator 32, medium temperature regenerator 13, low temperature turbine 23, low temperature turbine generators 33, cryogenic regenerator 14, compressor 24, driving
Motor 41, cooler 15, waste heat boiler 11, level-one current divider 51, two level current divider 54, level-one junction station 53 and two level junction station
52；
The outlet of the compressor 24 is connected with 51 entrance of level-one current divider, the outlets A of level-one current divider 51 and waste heat boiler
11 entrances are connected, and the outlets B of level-one current divider 51 are connected with the cold-side inlet of cryogenic regenerator 14, the outlet of waste heat boiler 11 and height
21 entrance of warm turbine is connected, and the output end of high-temperature turbine 21 is connected with the input terminal of high-temperature turbine generator 31, high-temperature turbine 21
Outlet is connected with the hot-side inlet of high temperature regenerator 12, the B entrances of the hot junction outlet and level-one junction station 53 of high temperature regenerator 12
It is connected, 12 cold side outlet of high temperature regenerator is connected with medium temperature turbine 22, output end and the medium temperature turbine generators of medium temperature turbine 22
32 input terminal is connected, and the outlet of medium temperature turbine 22 is connected with the A entrances of level-one junction station 53, the outlet of level-one junction station 53 and medium temperature
The hot-side inlet of regenerator 13 is connected, and the outlet of 13 hot junction of medium temperature regenerator is connected with the B entrances of two level junction station 52, medium temperature backheat
The cold-side inlet of device 13 is connected with the cold side outlet of cryogenic regenerator 14,13 cold side outlet of medium temperature regenerator and two level current divider 54
Entrance is connected, and the outlets B of two level current divider 54 are connected with the cold-side inlet of high temperature regenerator 12, the outlets A of two level current divider 54
It is connected with low temperature turbine 23, the output end of low temperature turbine 23 is connected with the input terminal of low temperature turbine generators 33, and low temperature turbine goes out
Mouth 23 is connected with the A entrances of two level junction station 52, and the outlet of two level junction station 52 is connected with the hot-side inlet of cryogenic regenerator 14, low
The hot junction outlet of warm regenerator 14 is connected with cooler 15, and the outlet of cooler 15 is connected with 24 entrance of compressor；Compressor 24
Input terminal is connected with the output end of driving motor 41.
More specifically：The waste heat boiler 11 is supercritical carbon dioxide waste heat boiler.Ensure 450~550 DEG C of combustion engine
The supercritical carbon dioxide of flue gas and pressure between 15~25MPa fully exchanges heat.
More specifically：The high temperature regenerator 12, medium temperature regenerator 13 and cryogenic regenerator 14 are Thermal Performance of Micro Channels
Device, end difference are less than 2 DEG C, resistance to having under the conditions of 300~450 DEG C of the high temperature of industrial grade carbon-dioxide, high pressure 7.5MPa~25MPa
Burn into compressive property.
The course of work：The low-temp low-pressure supercritical carbon dioxide working medium cooled down through subcooler 15 enters compressor 24 and is pressed
It is condensed to cryogenic high pressure working medium, waste heat boiler 11 and cryogenic regenerator 14 are further separated by level-one current divider 51, into waste heat pot
The working medium of stove 11 becomes high temperature and pressure working medium by the heat exchange with combustion engine flue gas, after which enters 21 expansion work of high-temperature turbine
High temperature regenerator 12, medium temperature regenerator 13, cryogenic regenerator 14 are flowed through, carrying out heat exchange with low temperature side working medium in regenerator realizes heat
The recycling of amount, in, the high-pressure working medium of cryogenic regenerator heating respectively enter in, the acting of low temperature turbine expansion, it is high,
In, low temperature turbine respectively drive a motor, the matching that rotating speed is not required between turbine can be realized steady power generation, and compressor is included to be driven
Dynamic running reliability of motor is more preferably.Three turbine structures realize the cascade utilization of high temperature refrigerant energy, can be maximumlly by cigarette
Gas waste heat energy is converted into electric energy.
Although disclosed embodiment is as above, its content is only to facilitate understand the technical side of the present invention
Case and the embodiment used, are not intended to limit the present invention.Any those skilled in the art to which this invention pertains, not
Under the premise of being detached from disclosed core technology scheme, any modification and change can be made in form and details in implementation
Change, but protection domain defined by the present invention, the range that the appended claims that must still be subject to limits.
Claims (3)
1. for three turbines, the three regenerator supercritical carbon dioxide cycle generating system of gas turbine waste heat recovery, feature exists
In：Including high-temperature turbine (21), high-temperature turbine generator (31), high temperature regenerator (12), medium temperature turbine (22), medium temperature turbine hair
Motor (32), medium temperature regenerator (13), low temperature turbine (23), low temperature turbine generators (33), cryogenic regenerator (14), compressor
(24), driving motor (41), cooler (15), waste heat boiler (11), level-one current divider (51), two level current divider (54), level-one
Junction station (53) and two level junction station (52)；
Compressor (24) outlet is connected with level-one current divider (51) entrance, the outlets A and the waste heat pot of level-one current divider (51)
Stove (11) entrance is connected, and the outlets B of level-one current divider (51) are connected with the cold-side inlet of cryogenic regenerator (14), waste heat boiler
(11) outlet is connected with high-temperature turbine (21) entrance, the input of the output end and high-temperature turbine generator (31) of high-temperature turbine (21)
End is connected, and high-temperature turbine (21) outlet is connected with the hot-side inlet of high temperature regenerator (12), and the hot junction of high temperature regenerator (12) goes out
Mouth is connected with the B entrances of level-one junction station (53), and high temperature regenerator (12) cold side outlet is connected with medium temperature turbine (22), and medium temperature is saturating
The output end of flat (22) is connected with the input terminal of medium temperature turbine generators (32), medium temperature turbine (22) outlet and level-one junction station
(53) A entrances are connected, and level-one junction station (53) outlet is connected with the hot-side inlet of medium temperature regenerator (13), medium temperature regenerator
(13) hot junction outlet is connected with the B entrances of two level junction station (52), the cold-side inlet and cryogenic regenerator of medium temperature regenerator (13)
(14) cold side outlet is connected, and medium temperature regenerator (13) cold side outlet is connected with two level current divider (54) entrance, two level current divider
(54) the outlets B are connected with the cold-side inlet of high temperature regenerator (12), the outlets A and the low temperature turbine (23) of two level current divider (54)
Be connected, the output end of low temperature turbine (23) is connected with the input terminal of low temperature turbine generators (33), low temperature turbine outlet (23) and
The A entrances of two level junction station (52) are connected, and two level junction station (52) outlet is connected with the hot-side inlet of cryogenic regenerator (14), low
The hot junction outlet of warm regenerator (14) is connected with cooler (15), and cooler (15) outlet is connected with compressor (24) entrance；Pressure
The input terminal of contracting machine (24) is connected with the output end of driving motor (41).
2. three turbines, the three regenerator supercritical carbon dioxide according to claim 1 for gas turbine waste heat recovery follows
Ring electricity generation system, it is characterised in that：The waste heat boiler (11) be supercritical carbon dioxide waste heat boiler, ensure combustion engine 450~
The supercritical carbon dioxide of 550 DEG C of flue gases and pressure between 15~25MPa fully exchanges heat.
3. three turbines, the three regenerator overcritical titanium dioxide according to claim 1 or 2 for gas turbine waste heat recovery
Carbon cycle electricity generation system, it is characterised in that：The high temperature regenerator (12), medium temperature regenerator (13) and cryogenic regenerator (14) are equal
For micro-channel heat exchanger, end difference is less than 2 DEG C, to 300~450 DEG C of high temperature, the high pressure 7.5MPa~25MPa of industrial grade carbon-dioxide
Under the conditions of have corrosion-resistant, compressive property.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810258181.6A CN108412563A (en) | 2018-03-27 | 2018-03-27 | Three turbines, three regenerator supercritical carbon dioxide cycle generating system for gas turbine waste heat recovery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810258181.6A CN108412563A (en) | 2018-03-27 | 2018-03-27 | Three turbines, three regenerator supercritical carbon dioxide cycle generating system for gas turbine waste heat recovery |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298567A (en) * | 2015-11-19 | 2016-02-03 | 中国核动力研究设计院 | Industrial waste heat utilization system adopting supercritical carbon dioxide working medium |
| CN205779057U (en) * | 2016-05-23 | 2016-12-07 | 中国科学院理化技术研究所 | A kind of enclosed combined cooling and power energy-storage system |
| CN106837438A (en) * | 2017-01-20 | 2017-06-13 | 中国科学院工程热物理研究所 | A kind of pressure energy of natural gas and cold energy combined recovery system of automobile and method |
| CN208073574U (en) * | 2018-03-27 | 2018-11-09 | 哈尔滨电气股份有限公司 | A kind of three regenerator supercritical carbon dioxide cycle generating system of three turbine |
-
2018
- 2018-03-27 CN CN201810258181.6A patent/CN108412563A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298567A (en) * | 2015-11-19 | 2016-02-03 | 中国核动力研究设计院 | Industrial waste heat utilization system adopting supercritical carbon dioxide working medium |
| CN205779057U (en) * | 2016-05-23 | 2016-12-07 | 中国科学院理化技术研究所 | A kind of enclosed combined cooling and power energy-storage system |
| CN106837438A (en) * | 2017-01-20 | 2017-06-13 | 中国科学院工程热物理研究所 | A kind of pressure energy of natural gas and cold energy combined recovery system of automobile and method |
| CN208073574U (en) * | 2018-03-27 | 2018-11-09 | 哈尔滨电气股份有限公司 | A kind of three regenerator supercritical carbon dioxide cycle generating system of three turbine |
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