CN112983576B - Modularized oxygen-enriched combustion power generation system with flexibly adjusted load and operation method thereof - Google Patents
Modularized oxygen-enriched combustion power generation system with flexibly adjusted load and operation method thereof Download PDFInfo
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- CN112983576B CN112983576B CN202110373238.9A CN202110373238A CN112983576B CN 112983576 B CN112983576 B CN 112983576B CN 202110373238 A CN202110373238 A CN 202110373238A CN 112983576 B CN112983576 B CN 112983576B
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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
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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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
- F01K13/02—Controlling, e.g. stopping or starting
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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
- F01K21/00—Steam engine plants not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/22—Methods of steam generation characterised by form of heating method using combustion under pressure substantially exceeding atmospheric pressure
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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
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses an oxygen-enriched combustion power generation system with flexibly adjusted modularized load and an operation method thereof, wherein fuel inlets of a boiler basic unit load module and a boiler unit load module are connected with a fuel outlet of a fuel supply device; the steam outlets of the boiler basic unit load module and the boiler unit load module are connected with a steam inlet of a steam turbine, and the steam turbine is connected with a generator; the flue gas outlet of the boiler basic unit load module is divided into two paths, one path is connected with a flue gas purification and dehydration device, and the other path is connected with the boiler unit load module; the flue gas outlet of the boiler unit load module is connected with a flue gas purification and dehydration device; the boiler basic unit load module and the boiler unit load module are also connected with an oxygen outlet of the air separation oxygen production device. The method can meet the requirement of flexible deep peak shaving of the thermal power plant unit, and has higher economical efficiency.
Description
Technical Field
The invention belongs to the field of flexible deep peak regulation, and relates to an oxygen-enriched combustion power generation system with flexible regulation of modular load and an operation method thereof.
Background
The new energy electric quantity grid connection needs the comprehensive participation of the basic energy electric power mainly generated by the thermal power generating unit in the deep peak regulation. However, the existing unit participating in deep peak shaving deviates from the design value for a long time to operate, so that the safety and the economy of the unit are reduced. From the technology and the practice of transformation, the transformed unit has the problems of unstable boiler low-load combustion and hydrodynamic circulation safety, full-load investment of a denitration device and low-load cooling of a steam turbine, flexibility of a control system during long-term low load and quick load change, equipment operation period and service life attenuation, heat supply unit thermoelectric decoupling and the like to different degrees.
At present, a unit participating in deep peak shaving runs for a long time deviating from a design value, so that the safety and the economy of the unit are reduced. However, the existing technical route which gives consideration to deep peak shaving of the thermal power generating unit is still in an exploration stage, and an economical and feasible technical route is not provided.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the oxygen-enriched combustion power generation system with flexibly adjusted modular load and the operation method thereof.
The technical scheme adopted by the invention is as follows:
an oxygen-enriched combustion power generation system with flexibly adjusted modular load comprises a fuel supply device, an air separation oxygen generation device, a boiler basic unit load module, a boiler unit load module, a flue gas purification and dehydration device, a steam turbine and a generator;
the fuel inlets of the boiler basic unit load module and the boiler unit load module are connected with the fuel outlet of the fuel supply device;
the steam outlets of the boiler basic unit load module and the boiler unit load module are connected with a steam inlet of a steam turbine, and the steam turbine is connected with a generator;
the flue gas outlet of the boiler basic unit load module is divided into two paths, one path is connected with a flue gas purification and dehydration device, and the other path is connected with the boiler unit load module; the flue gas outlet of the boiler unit load module is connected with a flue gas purification dehydration device;
the boiler basic unit load module and the boiler unit load module are also connected with an oxygen outlet of the air separation oxygen production device.
Preferably, the boiler unit load module comprises a first boiler unit load module, and the power of the first boiler unit load module is greater than that of the boiler basic unit load module.
Preferably, the boiler unit load module further comprises a second boiler unit load module, the power of the second boiler unit load module is greater than that of the first boiler unit load module, the flue gas outlet of the first boiler unit load module is divided into two paths, one path is connected with the flue gas purification and dehydration device, the other path is connected with the second boiler unit load module, and the flue gas outlet of the second boiler unit load module is connected with the flue gas purification and dehydration device.
Preferably, the boiler unit load module further comprises a third boiler unit load module, the power of the third boiler unit load module is greater than that of the second boiler unit load module, the flue gas outlet of the second boiler unit load module is divided into two paths, one path is connected with the flue gas purification and dehydration device, the other path is connected with the third boiler unit load module, and the flue gas outlet of the third boiler unit load module is connected with the flue gas purification and dehydration device.
Preferably, a control switch is arranged on a connecting pipeline between the boiler basic unit load module and the first boiler unit load module, and a control switch is arranged on a pipeline between the first boiler unit load module and the second boiler unit load module; and a control switch is arranged on a pipeline connecting the second boiler unit load module and the third boiler unit load module.
Preferably, a control switch is arranged on a pipeline connecting the fuel supply device and the boiler unit load module.
Preferably, a control switch is arranged on a pipeline connecting the air separation oxygen generation device and the boiler unit load module.
Preferably, a control switch is arranged on a pipeline connecting the boiler unit load module and the steam turbine.
Preferably, the outlet of the flue gas purification and dehydration device is divided into two paths, wherein one path is connected with the fuel supply device.
The invention also provides an operation method of the modularized oxygen-enriched combustion power generation system with flexibly adjusted load, which comprises the following steps:
when the thermal power generating unit needs deep peak shaving, starting a basic unit load module of the operating boiler, and closing the basic unit load module of the operating boiler if the external peak shaving capacity can be met; if the peak load regulation capacity cannot be met, the boiler unit load module is started;
and when the power generation and supply requirements of the thermal power generating unit are increased, operating the boiler basic unit load module and the boiler unit load module.
The invention has the following beneficial effects:
according to the modularized oxygen-enriched combustion power generation system with flexibly adjusted load, due to the arrangement of the boiler unit load module, when a motor set needs deep peak regulation, if the boiler basic unit load module cannot meet the external peak regulation capability, the boiler basic unit load module is started to provide electric quantity for the outside, and the load required by the outside can be matched with the boiler basic unit load module, so that the flexible peak regulation of the boiler load is realized; when the power generation and supply requirements of the thermal power generating unit are increased, the boiler basic unit load module and the boiler unit load module are both started, and both the boiler basic unit load module and the boiler unit load module can provide electric loads to meet external requirements, so that the oxygen-enriched combustion power generation system with flexibly adjusted modularized loads is high in economy. One of them way of boiler basic unit load module's exhanst gas outlet is connected with boiler unit load module, therefore boiler basic unit load module can provide the required flue gas of boiler unit load module burning.
Furthermore, the outlet of the flue gas purification and dehydration device is divided into two paths, wherein one path is connected with the fuel supply device, so that the fuel supply device can utilize CO discharged by the flue gas purification and dehydration device 2 "ShiNow CO 2 The efficient utilization of the water is realized.
Drawings
FIG. 1 is a schematic structural diagram of an oxygen-enriched combustion power generation system with flexibly adjusted modular loads according to the present invention.
Wherein: the system comprises a fuel supply device 1, an air separation oxygen production device 2, a boiler basic unit load module 3, a first boiler unit load module 4, a second boiler unit load module 5, a third boiler unit load module 6, a first control switch 7, a second control switch 8, a third control switch 9, a fourth control switch 10, a fifth control switch 11, a sixth control switch 12, a seventh control switch 13, an eighth control switch 14, a ninth control switch 15, a tenth control switch 16, an eleventh control switch 17, a twelfth control switch 18, a flue gas purification and dehydration device 19, a steam turbine 20 and a generator 21.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1, the modularized oxygen-enriched combustion power generation system with flexibly adjusted load of the invention comprises a fuel supply device 1, an air separation oxygen generation device 2, a boiler basic unit load module 3, a boiler unit load module, a flue gas purification and dehydration device 19, a steam turbine 20 and a generator 21; the fuel inlets of the boiler basic unit load module 3 and the boiler unit load module are both connected with the fuel outlet of the fuel supply device 1; the steam outlets of the boiler basic unit load module 3 and the boiler unit load module are both connected with a steam inlet of a steam turbine 20, and the steam turbine 20 is connected with a generator 21; the flue gas outlet of the boiler basic unit load module 3 is divided into two paths, one path is connected with a flue gas purification and dehydration device 19, and the other path is connected with the boiler unit load module; the flue gas outlet of the boiler unit load module is connected with a flue gas purification and dehydration device 19; the boiler basic unit load module 3 and the boiler unit load module are also connected with an oxygen outlet of the air separation oxygen production device 2. The fuel supply device 1 can supply fuel required by geotechnical combustion of the boiler base unit load module 3 and the boiler unit load module, and oxygen separated by the air separation oxygen generation device 2 is used for negative combustion of the boiler base unitCombustion of fuel in the load module 3 and the boiler unit load module; the steam exhausted by the boiler basic unit load module 3 and the boiler unit load module is used for enabling a steam turbine 20 to work, and the steam turbine 20 drives a generator 21 to generate electricity; one path of flue gas of the boiler basic unit load module 3 enters a flue gas purification and dehydration device 19 to obtain high-purity CO 2 High purity CO 2 Can be used for combustion of boilers. And the other path of the flue gas of the boiler basic unit load module 3 enters the boiler unit load module to provide the flue gas required for combustion supporting for the boiler unit load module.
As a preferred embodiment of the present invention, the boiler unit load module comprises a first boiler unit load module 4, the power of the first boiler unit load module 4 is greater than the power of the boiler base unit load module 3, and when the boiler base unit load module 3 cannot meet the peak load regulation requirement, the peak load regulation capability can be improved by turning on the first boiler unit load module 4.
As a preferred embodiment of the present invention, the boiler unit load module further comprises a second boiler unit load module 5, the power of the second boiler unit load module 5 is greater than the power of the first boiler unit load module 4, and when the basic boiler unit load module 3 and the first boiler unit load module 4 cannot meet the peak load regulation requirement, the second boiler unit load module 5 is turned on to improve the peak load regulation capability. The flue gas outlet of the first boiler unit load module 4 is divided into two paths, one path is connected with a flue gas purification and dehydration device 19, and the flue gas purification and dehydration device 19 is used for purifying CO in flue gas 2 Separating to obtain high-purity CO 2 The other path of the flue gas is connected with a second boiler unit load module 5 to provide the flue gas required by combustion supporting for the second boiler unit load module 5, a flue gas outlet of the second boiler unit load module 5 is connected with a flue gas purification and dehydration device 19, and the flue gas purification and dehydration device 19 is used for purifying CO in the flue gas 2 Separating to obtain high-purity CO 2 。
As a preferred embodiment of the present invention, the boiler unit load module further comprises a third boiler unit load module 6, the power of the third boiler unit load module 6 is larger than that of the second boiler unit load module 5, when the boiler basic unit load module 3 and the first boiler unit load module 3 are usedWhen the load module 4 and the load module 5 of the second boiler unit can not meet the peak regulation requirement, the load module 6 of the third boiler unit is started to improve the peak regulation capability. The flue gas outlet of the second boiler unit load module 5 is divided into two paths, one path is connected with a flue gas purification and dehydration device 19, and the flue gas purification and dehydration device 19 is used for purifying CO in the flue gas 2 Separating to obtain high-purity CO 2 . The other path is connected with a third boiler unit load module 6 to provide required flue gas for the combustion supporting of the third boiler unit load module 6, a flue gas outlet of the third boiler unit load module 6 is connected with a flue gas purification and dehydration device 19, and the flue gas purification and dehydration device 19 is used for purifying CO in the flue gas 2 Separating to obtain high-purity CO 2 。
As a preferred embodiment of the present invention, a control switch is provided on a connection pipeline between the boiler base unit load module 3 and the first boiler unit load module 4, and a control switch is provided on a pipeline between the first boiler unit load module 4 and the second boiler unit load module 5; and a control switch is arranged on a pipeline connecting the second boiler unit load module 5 and the third boiler unit load module 6.
As a preferred embodiment of the present invention, a control switch is provided on a pipe connecting the fuel supply apparatus 1 and the boiler unit load module.
As a preferred embodiment of the invention, a control switch is arranged on a pipeline connecting the air separation oxygen production device 2 and the load module of the boiler unit.
In a preferred embodiment of the present invention, a control switch is provided on a pipe connecting the boiler unit load module and the steam turbine 20.
As a preferred embodiment of the present invention, the outlet of the flue gas cleaning and dehydrating device 19 is divided into two paths, wherein one path is connected with the fuel supply device 1.
The invention also provides an operation method of the modularized oxygen-enriched combustion power generation system with flexibly adjusted load, which comprises the following steps:
when the thermal power generating unit needs deep peak shaving, starting the load module 3 of the basic unit of the operating boiler, and closing the load module of the basic unit of the boiler if the external peak shaving capability can be met; if the peak load regulation capacity cannot be met, the boiler unit load module is started;
and when the power generation and supply requirements of the thermal power generating unit are increased, the boiler basic unit load module 3 and the boiler unit load module are operated.
Examples
As shown in fig. 1, the oxygen-enriched combustion power generation system with flexibly adjusted modular load of the present embodiment includes a fuel supply device 1, an air separation oxygen generation device 2, a boiler basic unit load module 3, a first boiler unit load module 4, a second boiler unit load module 5, a third boiler unit load module 6, a flue gas purification and dehydration device 19, a steam turbine 20 and a power generator 21. Wherein the basic load of the boiler basic unit load module 3 is less than or equal to 100 MW. The first boiler unit load module 4 and the second boiler unit load module 5 meet the following requirements: the unit load is more than 100MW and less than or equal to 300 MW. The third boiler single unit load module 6 meets the requirements that the high load is more than 200MW and less than or equal to 400 MW. The fuel supply systems of the first, second and third boiler unit load modules 4, 5, 6 are arranged with a first control switch 7, a second control switch 8 and a third control switch 9, respectively. The oxidant systems of the first, second and third boiler unit load modules 4, 5, 6 are arranged with a fifth, seventh and ninth control switch 11, 13, 15, respectively. CO required for boiler 1 module combustion 2 The tail flue gas is provided after passing through a flue gas purification and dehydration device 19; the boiler basic unit load module 3 provides flue gas required in combustion supporting for the first boiler unit load module 4, and a fourth control switch 10 is arranged on a flue gas pipeline connecting the boiler basic unit load module 3 and the first boiler unit load module 4; the first boiler unit load module 4 provides flue gas required in combustion supporting for the second boiler unit load module 5, and a sixth control switch 12 is arranged on a flue gas pipeline connected with the first boiler unit load module 4 for the second boiler unit load module 5; the second boiler unit load module 5 provides the third boiler unit load module 6 with the flue gas required in combustion supporting, and the second boiler unit load module 5 is provided with an eighth control switch 14 on a flue gas pipeline connected with the third boiler unit load module 6. Boiler basic unit load module 3 and first boiler unit loadThe tail flue gas of the load module 4, the second boiler unit load module 5 and the third boiler unit load module 6 is communicated, and then the flue gas is introduced into a flue gas purification and dehydration device 19, and the flue gas purification and dehydration device 19 provides high-purity CO for combustion 2 . High purity CO obtained by the flue gas purification and dehydration device 19 2 As a drying agent and as a transport power for the fuel supply 1. The boiler basic unit load module 3, the first boiler unit load module 4, the second boiler unit load module 5 and the third boiler unit load module 6 can be of the same power or different powers, and the boiler basic unit load module 3, the first boiler unit load module 4, the second boiler unit load module 5 and the third boiler unit load module 6 are combined into a power generation system.
The operation method of the modularized oxygen-enriched combustion power generation system with flexibly adjusted load comprises the following processes:
if the total power of the unit is 600MW, wherein the power of the load module 3 of the basic boiler unit is 60MW, the power of the load module 4 of the first boiler unit is 120MW, the power of the load module 5 of the second boiler unit is 180MW, and the power of the load module 6 of the third boiler unit is 240 MW. The unit is required to carry out deep peak shaving, which specifically comprises the following steps:
when the thermal power generating unit needs deep peak regulation, starting the basic unit load module 3 of the operating boiler, and the maximum power is 60 MW; if the external peak load regulation capacity can be met, closing the first boiler unit load module 4, the second boiler unit load module 5 and the third boiler unit load module 6; if the peak load regulation capacity to the outside cannot be met, starting a first boiler unit load module 4 on the basis of starting the operating boiler basic unit load module 3 to provide electric quantity for the outside; when the basic unit load module 3 and the first boiler unit load module 4 of the boiler still cannot adjust the peak capacity to the outside, the second boiler unit load module 5 is started on the basis of starting and operating the basic unit load module 3 and the first boiler unit load module 4 of the boiler; by the principle, no matter how much load the unit is required to provide from the outside, the boiler load is flexibly adjusted through the combined matching among the boiler basic unit load module 3, the first boiler unit load module 4, the second boiler unit load module 5 and the third boiler unit load module 6.
When the power generation and supply requirements of the thermal power generating unit are increased, the boiler basic unit load module 3, the first boiler unit load module 4, the second boiler unit load module 5 and the third boiler unit load module 6 are started to operate, and each module can provide power loads to meet external requirements.
Claims (3)
1. An oxygen-enriched combustion power generation system with flexibly adjusted modularized load is characterized by comprising a fuel supply device (1), an air separation oxygen generation device (2), a boiler basic unit load module (3), a boiler unit load module, a flue gas purification dehydration device (19), a steam turbine (20) and a generator (21);
the fuel inlets of the boiler basic unit load module (3) and the boiler unit load module are connected with the fuel outlet of the fuel supply device (1);
the steam outlets of the boiler basic unit load module (3) and the boiler unit load module are connected with the steam inlet of a steam turbine (20), and the steam turbine (20) is connected with a generator (21);
the flue gas outlet of the boiler basic unit load module (3) is divided into two paths, one path is connected with a flue gas purification and dehydration device (19), and the other path is connected with the boiler unit load module; the flue gas outlet of the boiler unit load module is connected with a flue gas purification and dehydration device (19);
the boiler basic unit load module (3) and the boiler unit load module are also connected with an oxygen outlet of the air separation oxygen production device (2);
the boiler unit load module comprises a first boiler unit load module (4), and the power of the first boiler unit load module (4) is greater than that of the boiler basic unit load module (3);
the boiler unit load module also comprises a second boiler unit load module (5), the power of the second boiler unit load module (5) is greater than that of the first boiler unit load module (4), the flue gas outlet of the first boiler unit load module (4) is divided into two paths, one path is connected with the flue gas purification and dehydration device (19), the other path is connected with the second boiler unit load module (5), and the flue gas outlet of the second boiler unit load module (5) is connected with the flue gas purification and dehydration device (19);
a control switch is arranged on a pipeline connecting the fuel supply device (1) and the boiler unit load module;
a control switch is arranged on a pipeline connecting the air separation oxygen generation device (2) and the boiler unit load module;
a control switch is arranged on a pipeline connecting the boiler unit load module and the steam turbine (20);
the outlet of the flue gas purification dehydration device (19) is divided into two paths, wherein one path is connected with the fuel supply device (1);
the boiler unit load module further comprises a third boiler unit load module (6), the power of the third boiler unit load module (6) is larger than that of the second boiler unit load module (5), the flue gas outlet of the second boiler unit load module (5) is divided into two paths, one path is connected with the flue gas purification and dehydration device (19), the other path is connected with the third boiler unit load module (6), and the flue gas outlet of the third boiler unit load module (6) is connected with the flue gas purification and dehydration device (19).
2. An oxycombustion power generation system with flexible load adjustment of modularization according to claim 1, characterized in that, a control switch is provided on the connecting pipeline of the boiler base unit load module (3) and the first boiler unit load module (4), a control switch is provided on the connecting pipeline of the first boiler unit load module (4) and the second boiler unit load module (5); a control switch is arranged on a pipeline connecting the second boiler unit load module (5) and the third boiler unit load module (6).
3. A method of operating a modular load agile oxycombustion power generation system according to any of claims 1-2, characterized by comprising the process of:
when the thermal power generating unit needs deep peak shaving, starting the basic unit load module (3) of the operating boiler, and closing the basic unit load module of the operating boiler if the external peak shaving capability can be met; if the peak load regulation capacity cannot be met, the boiler unit load module is started;
when the power generation and supply requirements of the thermal power generating unit are increased, the boiler basic unit load module (3) and the boiler unit load module are operated.
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