CN104847425A - External combustion type Brayton combined cycle power generation device - Google Patents
External combustion type Brayton combined cycle power generation device Download PDFInfo
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- CN104847425A CN104847425A CN201510293700.9A CN201510293700A CN104847425A CN 104847425 A CN104847425 A CN 104847425A CN 201510293700 A CN201510293700 A CN 201510293700A CN 104847425 A CN104847425 A CN 104847425A
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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Abstract
The invention relates to an external combustion type Brayton combined cycle power generation device. A top Brayton cycle and bottom Brayton cycle composite running mode is adopted, and high-temperature air exhausted by a turbine motor in an external combustion type top Brayton cycle serves as a heat source of a bottom Brayton cycle; and air serves as a working medium of the bottom Brayton cycle, and after being recycled, waste heat of the air exhausted by the turbine motor in the top Brayton cycle is used for generating power in the bottom Brayton cycle. By the external combustion type Brayton combined cycle power generation device, a fuel selection range is expanded, and thermal energy generated by combustion is utilized reasonably; because influences of dirt in the working medium on the turbine motor, the safety of the turbine motor is guaranteed; the purpose of saving energy and reducing consumption is achieved; and the external combustion type Brayton combined cycle power generation device is particularly suitable for water-deficient areas.
Description
Technical field
The present invention relates to a kind of external-burning type Boulez to pause combined cycle generating unit, specifically belong to gas turbine power generation technical field.
Background technique
Advanced gas turbine is the key equipment of 21 century energy and power engineering system, is also the important symbol of an advanced degree in National Industrial basis in the world at present.Develop advanced gas turbine technology and there is great strategic significance and wide industrialization prospect, have earth shaking effect for the hi-tech development in China's association area.
Large Copacity, high efficiency gas turbine and combined cycle thereof have become an inevitable trend, and share shared in the generate output in the world increases especially significantly fast.In recent years since, a kind ofly earn swift and violent emergence with the little miniature gas turbine distributed energy resource system that is core and power supply unit, have greatly the trend accounting for market with large and medium-sized gas turbine altogether.This, power supply mode has following advantages: it is not or have very low power transmission and distribution loss (for centralized power supply system, this loss, at least up to about 10%, even reaches more than 15% in China); Without the need to building power distribution station, power transmission and distribution cost can be reduced; Be applicable to the change of multiple hotspot stress, system can be made to regulate flexibly according to the demand of heat load or electric load, be conducive to the utilization ratio of raising equipment; Be convenient to closely to user's heat supply and refrigeration, without the need to setting up expensive transmission pipeline network, expense of thus can reducing investment outlay, can improve again the utilization ratio of the energy, and civil engineering and installation cost can reduce; Each power station is independent mutually, and be convenient to control voluntarily, large-scale accident of power supply can not occur, the reliability of thus powering is high, is suitable for very much as commercial district, residential belt and even airport and subway station etc. provide electric power, heat supply and refrigeration; Under the prerequisite using clean fuel, even if in area, thickly populated city, the requirement of high standard environment-friendly quality also can be met.This will be medium-sized, particularly the applying of little miniature gas turbine, and provides a brand-new opportunity and market.
Chinese patent 201320854012.1 provides a kind of Kano-open Bretton hybrid power generation equipment, adopt the heat that fuel produces, heat the air after gas compressor compression, drag gas turbine expansion work, its essence is the pressure design by optimizing and appropriate heating-up temperature, in cyclic process, regenerator is not set, open Boulez is made to pause the temperature of cycle bleeder tail gas close to the air temperature of environment, thus effectively increase the output of merit, therefore how expanding its application area is worth research.
The circulation of external combustion gas turbine is what to be grown up on the basis of gas-turbine with regenerator circulation, its structure and extraction cycle structural similarity.In external-burning type gas turbine cycle, firing chamber is replaced by the regenerator of high temperature, and adds a substitute fuel firing chamber in outside, achieves the indirect heating of combustion gas turbine.In substitute fuel firing chamber, fuel burns in a little higher than ambient atmosphere pressure.The distinguishing feature of this circulation is: the indirect heating achieving combustion gas turbine, makes combustion gas without turbo machine, and the dirt avoided in fuel is blended in flue gas after burning, and then to the damage that turbo machine causes.The circulation of external combustion gas turbine provides a kind of selection newly for biomass fuel or the use of other solid fuels in gas turbine engine systems, because of but a kind of up-and-coming, efficient, cheap renewable energy utilization equipment, simultaneously it can reduce the discharge of greenhouse gases.
Therefore existing gas-turbine with regenerator circulating technology Problems existing how is solved, set up higher, the safe external-burning type Boulez of efficiency to pause combined cycle generation pattern, expand the Application Range of fuel in gas turbine cycle, the heat energy utilization that fuel combustion is produced is more reasonable, the discharge of effective reduction greenhouse gases, becomes the difficult point of this area research.
Summary of the invention
The present invention is for solving prior art Problems existing, a kind of external-burning type Boulez is provided to pause combined cycle generating unit, top circulation adopts external combustion gas turbine cycle machine set, the end circulation select air as Boulez pause circulation working medium, reclaim the waste heat of top circulation Exhaust Gas, to pause circulating generation for bottom Boulez, thus form external-burning type Boulez and to pause association circulating power generation system, reach energy-saving and cost-reducing object.
The object of the invention is to be realized by following measures:
A kind of external-burning type Boulez pauses combined cycle generating unit, this device utilize the top Boulez of external-burning type to pause higher gas of temperature that turbo machine in circulation discharges pauses as bottom Boulez the thermal source of circulation, reclaim the waste heat of top circulatory turbine machine Exhaust Gas, for end circulating generation, the association circulating power generation system thus formation external-burning type Boulez pauses, is characterized in that:
The circulation of pausing of described top Boulez refers to that combustion-supporting air 10 is after circulation gas compressor 11 supercharging of top, form top circulation pressurized air 12, send into heat exchanger 14, the top cyclic high-temperature air 15 formed sends into top circulatory turbine machine 16, drag top circulating generator 17 to generate electricity, the exhaust 18 of top circulatory turbine machine 16 is after high temperature regenerator 24 is lowered the temperature, form Cryogenic air 19, Cryogenic air 19 is sent to firing chamber 32 after blower fan 31 supercharging, with fuel 13 mixed combustion, the high-temperature flue gas produced is discharged after heat exchanger 14 is lowered the temperature, the circulation loop thus the top Boulez forming external-burning type pauses;
The circulation of pausing of described bottom Boulez refers to that air 20 is after the supercharging of end circulation gas compressor 21, produce pressurized air 22, the heat of the exhaust 18 of top circulatory turbine machine 16 is reclaimed by high temperature regenerator 24, the high temperature air 27 produced, feeding end circulatory turbine machine 28 drags end circulating generator 29 and generates electricity, the exhaust 30 of end circulatory turbine machine 28 enters air, the circulation loop thus formation bottom Boulez pauses;
Pause circulation and bottom Boulez of described top Boulez pauses and cycles through high temperature regenerator 24 and form external-burning type Boulez and to pause combined cycle generating unit.
Be provided with cryogenic regenerator 23: the circulation of pausing of described top Boulez refers to that combustion-supporting air 10 is after circulation gas compressor 11 supercharging of top, form top circulation pressurized air 12, send into heat exchanger 14, the top cyclic high-temperature air 15 formed sends into top circulatory turbine machine 16, drag top circulating generator 17 to generate electricity, the exhaust 18 of top circulatory turbine machine 16 is through high temperature regenerator 24, after cryogenic regenerator 23 is lowered the temperature, form Cryogenic air 19, Cryogenic air 19 is sent to firing chamber 32 after blower fan 31 supercharging, with fuel 13 mixed combustion, the high-temperature flue gas produced is discharged after heat exchanger 14 is lowered the temperature, the circulation loop thus the top Boulez forming external-burning type pauses,
The circulation of pausing of described bottom Boulez refers to that air 20 is after the supercharging of end circulation gas compressor 21, produce pressurized air 22, the heat of the exhaust 18 of top circulatory turbine machine 16 is reclaimed by cryogenic regenerator 23, high temperature regenerator 24, the high temperature air 27 produced, feeding end circulatory turbine machine 28 drags end circulating generator 29 and generates electricity, the exhaust 30 of end circulatory turbine machine 28 enters air, the circulation loop thus formation bottom Boulez pauses.
Be provided with air-strainer: described air sends into gas compressor after air-strainer filters.
Described fuel 13 adopts gaseous fuel, liquid fuel or solid fuel.
Described top circulation gas compressor 11, end circulation gas compressor 21 adopt one stage of compression, or multistage compression, cooling during rolling mode.
Described top circulation gas compressor 11, end circulation gas compressor 21 adopt screw compressor, centrifugal compressor, piston compressor, slide vane compressor or Axial Flow Compressor.
Described top circulation gas compressor 11, end circulation gas compressor 21 can merge into same gas compressor, and the pressurized air after supercharging is divided into two-way, namely push up circulation pressurized air 12, end circulation pressurized air 22, are sent to top circulation, end circulation respectively as cycle fluid.
Described top circulatory turbine machine 16, end circulatory turbine machine 28 can adopt the coaxial or different axle method of operation.
When described top circulatory turbine machine 16, end circulatory turbine machine 28 adopt coaxial manner, top circulating generator 17, end circulating generator 29 can merge into same generator.
Described high temperature regenerator 24 or cryogenic regenerator 23 comprise surface-type and regenerative two class.
Described heat exchanger 14 comprises surface-type and regenerative two class.
Described surface-type regenerator includes but not limited to shell of pipe type, board-like, plate and fin type and original surface formula.
Described top circulatory turbine machine 16, end circulatory turbine machine 28 are scroll expansion machine, screw type expansion machine, centrifugal decompressor or piston expansion engine.
Described top Boulez the pause turbo machine of circulation of circulation, bottom Boulez that pauses adopts identical or different suction pressure, adopts identical or different intake temperature.
Circulation and the bottom Boulez circulation of pausing of pausing of described top Boulez can select different pressure, temperature composition external-burning type Boulez to pause association circulating power generation system, such as top Boulez pauses to circulate and adopts the method for operation of low pressure, higher temperature, and bottom Boulez pauses to circulate and adopts the method for operation of high pressure, lower temperature.
Unaccounted equipment and standby system thereof in the present invention, pipeline, instrument, valve, the bypass facility etc. that is incubated, has regulatory function adopt known mature technology to carry out supporting.
Be provided with the safety supporting with present system, regulating controller, adopt the control technique of existing maturation to carry out supporting, external-burning type Boulez is paused combined cycle generating unit energy economy, safety, high-efficiency operation, reaches energy-saving and cost-reducing object.
The present invention compared to existing technology tool has the following advantages:
1, by increasing the air quantity that bottom Boulez pauses in circulation, can effectively reduce top Boulez pause circulation delivery temperature, simultaneously by adjustment bottom Boulez pause circulation pressure and temperature, the gas temperature that during the end can be made to circulate, gas turbine is discharged is lower, the thermal efficiency of Combined Cycle Unit is higher, can reach more than 42%; Give full play of external-burning type Boulez to pause the advantage of cycle machine set safety simultaneously.
2, the external-burning type Boulez Combined Cycle Unit runing adjustment that pauses is flexible, without the need to being equipped with the condenser in conventional gas-steam combined cycle power generating unit, the Utilities water consumption of unit reduces significantly, equipment greatly simplifies, without the need to arranging deoxygenation Demineralizer, be particularly suitable for water-deficient area.
3, the self-insurance ability of system is strong; during one of the turbo machine in top Boulez pauses and bottom Boulez pauses off-the-line, still by regulating the method for operation, guarantee unit safety operation; enhance safety operation elasticity and the flexibility of whole system, be convenient to the rapid enforcement of safe emergency measure.
4, circulation pressurized air in the end can adopt the method for operation of atm number, high pressure, lower temperature, is guaranteeing, under the prerequisite effectively reducing top circulating exhaust temperature, the end cycle machine set thermal efficiency, effectively to reduce equipment manufacturing cost.
5, in Combined Cycle Unit top circulation and end circulatory turbine machine can adopt coaxial manner, the end circulation and top circulation generator can merge into a generator, thus equipment is simplified more, compact.
Accompanying drawing explanation
Fig. 1 is that a kind of external-burning type Boulez of the present invention pauses combined cycle generating unit schematic flow sheet;
In Fig. 1: 10-combustion-supporting air, 11-pushes up circulation gas compressor, and 12-pushes up circulation pressurized air, 13-fuel, 14-heat exchanger, 15-pushes up cyclic high-temperature air, and 16-pushes up circulatory turbine machine, and 17-pushes up circulating generator, 18-is vented, 19-Cryogenic air, 20-air, circulation gas compressor at the bottom of 21-, 22-pressurized air, 23-cryogenic regenerator, 24-high temperature regenerator, 27-high temperature air, circulatory turbine machine at the bottom of 28-, circulating generator at the bottom of 29-, 30-is vented, 31-blower fan, 32-firing chamber, 33-flue gas.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1:
As shown in Figure 1, a kind of external-burning type Boulez of the present invention pauses combined cycle generating unit schematic flow sheet.
A kind of external-burning type Boulez pauses combined cycle generating unit, this device utilize the top Boulez of external-burning type to pause higher air of temperature that turbo machine in circulation discharges pauses as bottom Boulez the thermal source of circulation, reclaim the waste heat of top circulatory turbine machine Exhaust Gas, for end circulating generation, the association circulating power generation system thus formation external-burning type Boulez pauses.
The circulation of pausing of described top Boulez refers to that combustion-supporting air 10 is after circulation gas compressor 11 supercharging of top, form top circulation pressurized air 12, send into heat exchanger 14, the top cyclic high-temperature air 15 formed sends into top circulatory turbine machine 16, drag top circulating generator 17 to generate electricity, the exhaust 18 of top circulatory turbine machine 16 is after high temperature regenerator 24 is lowered the temperature, form Cryogenic air 19, Cryogenic air 19 is sent to firing chamber 32 after blower fan 31 supercharging, with fuel 13 mixed combustion, the high-temperature flue gas produced is discharged after heat exchanger 14 is lowered the temperature, the circulation loop thus the top Boulez forming external-burning type pauses;
The circulation of pausing of described bottom Boulez refers to that air 20 is after the supercharging of end circulation gas compressor 21, produce pressurized air 22, the heat of the exhaust 18 of top circulatory turbine machine 16 is reclaimed by high temperature regenerator 24, the high temperature air 27 produced, feeding end circulatory turbine machine 28 drags end circulating generator 29 and generates electricity, the exhaust 30 of end circulatory turbine machine 28 enters air, the circulation loop thus formation bottom Boulez pauses;
Pause circulation and bottom Boulez of described top Boulez pauses and cycles through high temperature regenerator 24 and form external-burning type Boulez and to pause combined cycle generating unit.
Be provided with cryogenic regenerator 23: the circulation of pausing of described top Boulez refers to that combustion-supporting air 10 is after circulation gas compressor 11 supercharging of top, form top circulation pressurized air 12, send into heat exchanger 14, the top cyclic high-temperature air 15 formed sends into top circulatory turbine machine 16, drag top circulating generator 17 to generate electricity, the exhaust 18 of top circulatory turbine machine 16 is through high temperature regenerator 24, after cryogenic regenerator 23 is lowered the temperature, form Cryogenic air 19, Cryogenic air 19 is sent to firing chamber 32 after blower fan 31 supercharging, with fuel 13 mixed combustion, the high-temperature flue gas produced is discharged after heat exchanger 14 is lowered the temperature, the circulation loop thus the top Boulez forming external-burning type pauses,
The circulation of pausing of described bottom Boulez refers to that air 20 is after the supercharging of end circulation gas compressor 21, produce pressurized air 22, the heat of the exhaust 18 of top circulatory turbine machine 16 is reclaimed by cryogenic regenerator 23, high temperature regenerator 24, the high temperature air 27 produced, feeding end circulatory turbine machine 28 drags end circulating generator 29 and generates electricity, the exhaust 30 of end circulatory turbine machine 28 enters air, the circulation loop thus formation bottom Boulez pauses.
Be provided with air-strainer: described air sends into gas compressor after air-strainer filters.
Described fuel 13 adopts rock gas.
Described top circulation gas compressor 11, end circulation gas compressor 21 adopt multistage compression, cooling during rolling mode;
Described top circulation gas compressor 11, end circulation gas compressor 21 adopt screw compressor.
Described top circulatory turbine machine 16, end circulatory turbine machine 28 can adopt the coaxial or different axle method of operation.
When described top circulatory turbine machine 16, end circulatory turbine machine 28 adopt coaxial manner, top circulating generator 17, end circulating generator 29 can merge into same generator.
Described high temperature regenerator 24 or cryogenic regenerator 23 comprise surface-type regenerator.
Described heat exchanger 14 adopts surface-type heat exchanger.
Described surface-type regenerator includes but not limited to shell of pipe type, board-like, plate and fin type and original surface formula.
Described top circulatory turbine machine 16, end circulatory turbine machine 28 are scroll expansion machine.
Described top Boulez the pause turbo machine of circulation of circulation, bottom Boulez that pauses adopts different suction pressures, different intake temperature.
Unaccounted equipment and standby system thereof in the present invention, pipeline, instrument, valve, the bypass facility etc. that is incubated, has regulatory function adopt known mature technology to carry out supporting.
Be provided with the safety supporting with present system, regulating controller, adopt the control technique of existing maturation to carry out supporting, superposition type Boulez is paused association circulating power generation system energy economy, safety, high-efficiency operation, reaches energy-saving and cost-reducing object.
Although the present invention with preferred embodiment openly as above; but they are not for limiting the present invention, being anyly familiar with related domain technical professional, without departing from the spirit and scope of the invention; various simple modification, equivalent variations can be made, still belong to the protection domain of technical solution of the present invention.
Claims (10)
1. an external-burning type Boulez pauses combined cycle generating unit, this device utilize the top Boulez of external-burning type to pause higher air of temperature that turbo machine in circulation discharges pauses as bottom Boulez the thermal source of circulation, reclaim the waste heat of top circulatory turbine machine Exhaust Gas, for end circulating generation, the association circulating power generation system thus formation external-burning type Boulez pauses, is characterized in that:
The circulation of pausing of described top Boulez refers to that combustion-supporting air (10) is after circulation gas compressor (11) supercharging of top, form top circulation pressurized air (12), send into heat exchanger (14), top cyclic high-temperature air (15) formed is sent into top circulatory turbine machine (16) and is dragged top circulating generator (17) generating, the exhaust (18) on top circulatory turbine machine (16) is after high temperature regenerator (24) cooling, form Cryogenic air (19), Cryogenic air (19) is sent to firing chamber (32) after blower fan (31) supercharging, with fuel (13) mixed combustion, the high-temperature flue gas produced is discharged after heat exchanger (14) cooling, the circulation loop thus the top Boulez forming external-burning type pauses,
The circulation of pausing of described bottom Boulez refers to that air (20) is after end circulation gas compressor (21) supercharging, produce pressurized air (22), the heat of the exhaust (18) on top circulatory turbine machine (16) is reclaimed by high temperature regenerator (24), the high temperature air (27) produced, send into end circulatory turbine machine (28) dragging end circulating generator (29) generating, the exhaust (30) at end circulatory turbine machine (28) enters air, the circulation loop thus formation bottom Boulez pauses;
Pause circulation and bottom Boulez of described top Boulez pauses and cycles through high temperature regenerator (24) and form external-burning type Boulez and to pause combined cycle generating unit.
2. device according to claim 1, is characterized in that:
This device is provided with cryogenic regenerator (23):
The circulation of pausing of described top Boulez refers to that combustion-supporting air (10) is after circulation gas compressor (11) supercharging of top, form top circulation pressurized air (12), send into heat exchanger (14), top cyclic high-temperature air (15) formed is sent into top circulatory turbine machine (16) and is dragged top circulating generator (17) generating, the exhaust (18) on top circulatory turbine machine (16) is through high temperature regenerator (24), after cryogenic regenerator (23) cooling, form Cryogenic air (19), Cryogenic air (19) is sent to firing chamber (32) after blower fan (31) supercharging, with fuel (13) mixed combustion, the high-temperature flue gas produced is discharged after heat exchanger (14) cooling, the circulation loop thus the top Boulez forming external-burning type pauses,
The circulation of pausing of described bottom Boulez refers to that air (20) is after end circulation gas compressor (21) supercharging, produce pressurized air (22), the heat of the exhaust (18) on top circulatory turbine machine (16) is reclaimed by cryogenic regenerator (23), high temperature regenerator (24), the high temperature air (27) produced, send into end circulatory turbine machine (28) dragging end circulating generator (29) generating, the exhaust (30) at end circulatory turbine machine (28) enters air, the circulation loop thus formation bottom Boulez pauses.
3. device according to claim 1, is characterized in that:
Described top circulatory turbine machine (16), end circulatory turbine machine (28) adopt the coaxial or different axle method of operation.
4. device according to claim 1, is characterized in that:
Described top circulating generator (17), end circulating generator (29) are same generator.
5. device according to claim 1, is characterized in that:
Described top Boulez the pause turbo machine of circulation of turbo machine, the bottom Boulez of circulation that pauses adopts identical or different suction pressure, identical or different intake temperature.
6. device according to claim 1, is characterized in that:
Described top circulation gas compressor (11), end circulation gas compressor (21) adopt one stage of compression, or multistage compression, cooling during rolling mode.
7. device according to claim 1, is characterized in that:
Described top circulation gas compressor (11), end circulation gas compressor (21) adopt screw compressor, centrifugal compressor, piston compressor, slide vane compressor or Axial Flow Compressor.
8. device according to claim 1, is characterized in that:
Described heat exchanger (14) adopts surface-type or regenerative heat exchanger.
9. device according to claim 1, is characterized in that:
Described high temperature regenerator (24), cryogenic regenerator (23) adopt surface-type or regenerative regenerator.
10. device according to claim 1, is characterized in that:
Described fuel (13) adopts gaseous fuel, liquid fuel or solid fuel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113454389A (en) * | 2018-12-21 | 2021-09-28 | 西肯斯股份有限公司 | Burner system and method for providing thermal energy |
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