CN108844051B - Supercritical CO 2 Test boiler for working medium - Google Patents
Supercritical CO 2 Test boiler for working medium Download PDFInfo
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- CN108844051B CN108844051B CN201811056584.9A CN201811056584A CN108844051B CN 108844051 B CN108844051 B CN 108844051B CN 201811056584 A CN201811056584 A CN 201811056584A CN 108844051 B CN108844051 B CN 108844051B
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- working medium
- superheater
- reheater
- flue
- primary
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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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
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Supercritical CO 2 A test boiler is a working medium and relates to the field of boiler equipment. To solve the supercritical CO 2 The boiler is used for solving the problem of low Brayton cycle operation parameters of working media, and is high in operation parameters. Said supercritical CO is adopted 2 The novel test boiler for working medium comprises a gas burner, a hearth, a horizontal flue, a flue baffle, a flue gas recirculation fan and an air preheater which are sequentially arranged; a second-stage superheater, a first-stage superheater and a superheater-side shunt economizer are arranged in a right flue of the horizontal flue, and a second-stage reheater, a first-stage reheater and a reheater-side shunt economizer are arranged in a left flue; 10% of the flow of the working medium is divided into two parts, one part of the working medium flows through the superheater side split-flow economizer, and the other part of the working medium simultaneously flows through the reheater side split-flow economizer; the 10% a working medium is mixed with the rest 90% a working medium before the inlet header of the air cooling wall, and then introduced into the air cooling wall to absorb heat and enter the steam turbine to do work.
Description
Technical Field
The invention belongs to the field of boiler equipment, and particularly relates to a boiler equipment adopting supercritical CO 2 Is a novel test boiler of working medium.
Background
Increasing the efficiency of a generator set is a constant topic and goal of research in the power industry. For power generation enterprises, the higher the circulation efficiency of the system is, the lower the energy consumption of the unit generated energy is, and the lower the corresponding energy consumption and pollutant emission is. For a traditional generator set taking steam Rankine cycle as an energy conversion system, if the power generation efficiency is improved to about 50%, the main steam parameter is required to be improved to 700 ℃, which means that high economic cost and time cost are required to develop the novel nickel-based superalloy. The supercritical CO2 Brayton cycle is a novel concept advanced power system with great potential, can effectively avoid the technical bottleneck in the aspect of materials, mainly because the supercritical CO2 has the characteristics of high energy density, high heat transfer efficiency and the like, the supercritical CO2 Brayton cycle efficient power generation system can reach the efficiency of the conventional steam Rankine cycle at 700 ℃ in the temperature range of about 600 ℃, a novel high-temperature nickel-based alloy is not required to be developed, and the equipment size is smaller than that of a steam unit with the same parameter, so that the economy is very good.
At present, supercritical CO in China 2 Application research of Brayton cycle on large-capacity and high-parameter thermal power generating units is just started, and a plurality of small test systems have been established abroad, but the operation parameters are generally lower, and no high-parameter supercritical CO exists 2 Novel test boiler.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: providing a supercritical CO with high operation parameters 2 The novel test boiler is a Brayton cycle of working medium.
The invention adopts the technical scheme for solving the technical problems that: said supercritical CO is adopted 2 The novel test boiler for working medium comprises a gas burner, a hearth, a horizontal flue, a flue baffle, a flue gas recirculation fan and an air preheater which are sequentially arranged;
the gas burner is positioned at the top of the hearth; the horizontal flue is vertically arranged with the hearth and forms an L-shaped arrangement mode; the horizontal flue is in a double-flue arrangement mode, a secondary superheater, a primary superheater and a superheater side shunt economizer are sequentially arranged in the right flue, and a secondary reheater, a primary reheater and a reheater side shunt economizer are sequentially arranged in the left flue;
the flue baffle is positioned at the tail of the horizontal flue and at the outlets of the superheater side shunt economizer and the reheater side shunt economizer, the flue gas recirculation fan introduces the extracted flue gas into the outlet of the air preheater, and the flue gas is mixed with primary air and then enters the gas burner;
the furnace is formed by enclosing air cooling walls, an air cooling wall inlet header is arranged at the upper end of the furnace, an air cooling wall outlet header is arranged at the lower end of the furnace, a superheater inlet header is arranged at the inlet of the primary superheater, and a superheater outlet header is arranged at the outlet of the secondary superheater; a reheater inlet header is arranged at the inlet of the primary reheater, and a reheater outlet header is arranged at the outlet of the secondary reheater;
the superheater inlet header at the inlet of the primary superheater is connected with the gas cooling wall outlet header, the outlet of the primary superheater is connected with the inlet of the secondary superheater, and the superheater outlet header at the outlet of the secondary superheater is connected with the inlet of the high-pressure cylinder of the steam turbine;
the reheater inlet header at the inlet of the primary reheater is connected with the outlet of the high-pressure cylinder of the steam turbine, and the reheater outlet header at the outlet of the secondary reheater is connected with the inlet of the low-pressure cylinder of the steam turbine;
the flow of the working medium is a, wherein 10 percent of the working medium a is divided into two parts, one part of the working medium flows through the superheater side split-flow economizer, and the other part of the working medium simultaneously flows through the reheater side split-flow economizer; the 10% a working medium and the remaining 90% a working medium are mixed before an air cooling wall inlet header, then introduced into an air cooling wall for absorbing heat, and then flow through a primary superheater and a secondary superheater to enter a high-pressure cylinder of a steam turbine for acting;
working medium which is done work from the high-pressure cylinder of the steam turbine flows through the primary reheater and the secondary reheater and enters the low-pressure cylinder of the steam turbine to do work.
The beneficial effects of the invention are as follows:
1. according to the invention, the arrangement mode of the boiler and the distribution mode of working media ensure that the outlet parameters of the boiler reach 20MPa/600/600 ℃;
2. the arrangement mode of the boiler is convenient for test and overhaul, and ensures the operation safety of the boiler.
Drawings
FIG. 1 is a side view of a novel test boiler;
FIG. 2 is a top view of a horizontal flue;
FIG. 3 is supercritical CO 2 And a conveying process diagram of the working medium.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments with reference to the accompanying drawings:
the first embodiment is as follows: description of the present embodiment with reference to FIGS. 1-3, the present embodiment describes the use of supercritical CO 2 The novel test boiler for working medium comprises a gas burner 1, a hearth 2, a horizontal flue 3, a flue baffle 4, a flue gas recirculation fan 5 and an air preheater 6 which are sequentially arranged;
the gas burner 1 is positioned at the top of the hearth; the horizontal flue 3 is vertically arranged with the hearth 2 and forms an L-shaped arrangement mode; the horizontal flue 3 is in a double flue arrangement mode, a secondary superheater 3-1, a primary superheater 3-2 and a superheater side shunt economizer 3-3 are sequentially arranged in the right flue, and a secondary reheater 3-4, a primary reheater 3-5 and a reheater side shunt economizer 3-6 are sequentially arranged in the left flue;
the flue baffle 4 is positioned at the tail of the horizontal flue 3 and at the outlets of the superheater side shunt economizer 3-3 and the reheater side shunt economizer 3-6, and the flue gas recirculation fan 5 introduces the extracted flue gas to the outlet of the air preheater 6, and the flue gas is mixed with primary air and then enters the gas burner 1;
the furnace 2 is formed by enclosing air cooling walls, an air cooling wall inlet header is arranged at the upper end of the furnace 2, an air cooling wall outlet header is arranged at the lower end of the furnace 2, a superheater inlet header is arranged at the inlet of the primary superheater 3-2, and a superheater outlet header is arranged at the outlet of the secondary superheater 3-1; a reheater inlet header is arranged at the inlet of the primary reheater 3-5, and a reheater outlet header is arranged at the outlet of the secondary reheater 3-4;
the superheater inlet header at the inlet of the primary superheater 3-2 is connected with the air cooling wall outlet header, the outlet of the primary superheater 3-2 is connected with the inlet of the secondary superheater 3-1, and the superheater outlet header at the outlet of the secondary superheater 3-1 is connected with the inlet of the high-pressure cylinder of the steam turbine;
the reheater inlet header at the inlet of the primary reheater 3-5 is connected with the outlet of the high-pressure cylinder of the steam turbine, and the reheater outlet header at the outlet of the secondary reheater 3-4 is connected with the inlet of the low-pressure cylinder of the steam turbine;
the flow of the working medium is a, wherein 10 percent of the working medium a is divided into two parts, one part of the working medium flows through the superheater side shunt economizer 3-3, and the other part of the working medium simultaneously flows through the reheater side shunt economizer 3-6; the 10% a working medium and the remaining 90% a working medium are mixed before an air cooling wall inlet header, then introduced into an air cooling wall for absorbing heat, and then flow through a primary superheater 3-2 and a secondary superheater 3-1 to enter a high-pressure cylinder of a steam turbine for acting;
working medium which has done work from the high pressure cylinder of the steam turbine flows through the primary reheater 3-5 and the secondary reheater 3-4 to enter the low pressure cylinder of the steam turbine for doing work.
The gas cooling wall is formed by welding a row of pipes, a three-dimensional space formed in the welded gas cooling wall forms a hearth, and smoke generated by the gas burner is arranged in the hearth.
As shown in fig. 3: supercritical CO 2 The 10% of the working medium is divided into two parts and flows through a superheater side shunt economizer and a reheater side shunt economizer at the same time, then is mixed with the rest 90% of the working medium, enters into an air cooling wall (pipe) through an air cooling wall inlet header, then sequentially enters into a primary superheater and a secondary superheater through an air cooling wall outlet header for heating, and finally enters into a turbine high-pressure cylinder for acting; supercritical CO after working in high-pressure cylinder of steam turbine 2 The working medium is heated by the primary reheater 3-5 and the secondary reheater 3-4 in sequence and then enters into a low-pressure cylinder of the steam turbine to do work.
The flue gas generated by the gas burner sequentially passes through the hearth and the horizontal flue, wherein one part of flue gas is discharged through the air preheater, and the other part of flue gas and air at the outlet of the air preheater are circulated and enter the gas burner through a pipeline.
The second embodiment is as follows: the furnace 2 according to the present embodiment is a three-dimensional space formed inside the vertical coil air-cooled wall.
Other components and connection modes are the same as in the first embodiment.
And a third specific embodiment: the 10% a working medium described in this embodiment is equally split into two streams, one half of which flows through the superheater-side split economizer 3-3, and the other half of which simultaneously flows through the reheater-side split economizer 3-6.
Other components and connection modes are the same as those of the second embodiment.
The specific embodiment IV is as follows: the flow a of the working medium in the embodiment is 290t/h.
Supercritical CO with flow rate of 290t/h 2 10% of working medium is equally divided into two flows which simultaneously flow through a superheater side shunt economizer and a reheater side shunt economizer, then is mixed with the rest 90% of working medium, enters the air cooling wall through an air cooling wall inlet header, then sequentially enters a primary superheater and a secondary superheater through an air cooling wall outlet header for heating, the pressure intensity before entering a turbine high-pressure cylinder is 20Mpa, and finally enters the turbine high-pressure cylinder for acting; supercritical CO after working in high-pressure cylinder of steam turbine 2 The working medium is heated by the primary reheater 3-5 and the secondary reheater 3-4 in sequence and then enters into a low-pressure cylinder of the steam turbine to do work.
Other components and connection modes are the same as those of the third embodiment.
Fifth embodiment: the temperature of the working medium in the embodiment flowing out of the superheater outlet header after being heated by the primary superheater 3-2 and the secondary superheater 3-1 is 600 ℃.
Supercritical CO with flow rate of 290t/h 2 10% of the working medium is equally divided into two flows which simultaneously flow through a superheater side shunt economizer and a reheater side shunt economizer, then is mixed with the rest 90% of the working medium, enters the air cooling wall through an air cooling wall inlet header, sequentially enters a primary superheater and a secondary superheater through an air cooling wall outlet header for heating until the temperature before entering a turbine high-pressure cylinder is 600 ℃, the pressure is 20Mpa, and finally enters the turbine high-pressure cylinder for acting; supercritical CO after working in high-pressure cylinder of steam turbine 2 The working medium is heated by the primary reheater 3-5 and the secondary reheater 3-4 in sequence and then enters into a low-pressure cylinder of the steam turbine to do work.
Other components and connection modes are the same as those of the fourth embodiment.
Specific embodiment six: the temperature of the working medium in the embodiment, which flows out of the reheater outlet header after being heated by the primary reheater 3-5 and the secondary reheater 3-4, is 600 ℃.
Supercritical CO with flow rate of 290t/h 2 10% of the working medium is equally divided into two flows which simultaneously flow through a superheater side shunt economizer and a reheater side shunt economizer, then is mixed with the rest 90% of the working medium, enters the air cooling wall through an air cooling wall inlet header, sequentially enters a primary superheater and a secondary superheater through an air cooling wall outlet header for heating until the temperature before entering a turbine high-pressure cylinder is 600 ℃, the pressure is 20Mpa, and finally enters the turbine high-pressure cylinder for acting; supercritical CO after working in high-pressure cylinder of steam turbine 2 And heating the working medium sequentially through the primary reheater 3-5 and the secondary reheater 3-4 until the temperature before the working medium enters the low-pressure cylinder of the steam turbine is 600 ℃, and then entering the low-pressure cylinder of the steam turbine to do work.
Other components and connection modes are the same as those of the fifth embodiment.
Claims (6)
1. A test boiler using supercritical CO2 as working medium is characterized in that: comprises a gas burner (1), a hearth (2), a horizontal flue (3), a flue baffle (4), a flue gas recirculation fan (5) and an air preheater (6) which are arranged in sequence;
the gas burner (1) is positioned at the top of the hearth; the horizontal flue (3) is vertically arranged with the hearth (2) and forms an L-shaped arrangement mode; the horizontal flue (3) is in a double flue arrangement mode, a secondary superheater (3-1), a primary superheater (3-2) and a superheater side shunt economizer (3-3) are sequentially arranged in the right flue, and a secondary reheater (3-4), a primary reheater (3-5) and a reheater side shunt economizer (3-6) are sequentially arranged in the left flue;
the flue baffle (4) is positioned at the tail of the horizontal flue (3) and at the outlets of the superheater side shunt economizer (3-3) and the reheater side shunt economizer (3-6), the flue gas recirculation fan (5) introduces the extracted flue gas into the outlet of the air preheater (6), and the flue gas enters the gas burner (1) after being mixed with primary air;
the hearth (2) is formed by enclosing air cooling walls, an air cooling wall inlet header is arranged at the upper end of the hearth (2), an air cooling wall outlet header is arranged at the lower end of the hearth (2), a superheater inlet header is arranged at the inlet of the primary superheater (3-2), and a superheater outlet header is arranged at the outlet of the secondary superheater (3-1); a reheater inlet header is arranged at the inlet of the primary reheater (3-5), and a reheater outlet header is arranged at the outlet of the secondary reheater (3-4);
the inlet header of the superheater at the inlet of the primary superheater (3-2) is connected with the outlet header of the air cooling wall, the outlet of the primary superheater (3-2) is connected with the inlet of the secondary superheater (3-1), and the outlet header of the superheater at the outlet of the secondary superheater (3-1) is connected with the inlet of the high-pressure cylinder of the steam turbine;
the reheater inlet header at the inlet of the primary reheater (3-5) is connected with the outlet of the high-pressure cylinder of the steam turbine, and the reheater outlet header at the outlet of the secondary reheater (3-4) is connected with the inlet of the low-pressure cylinder of the steam turbine;
the flow of the working medium is a, wherein 10 percent of the working medium a is divided into two parts, one part of the working medium flows through the superheater side shunt economizer (3-3), and the other part of the working medium simultaneously flows through the reheater side shunt economizer (3-6); the 10% a working medium and the remaining 90% a working medium are mixed before an air cooling wall inlet header, then introduced into an air cooling wall for absorbing heat, and then flow through a primary superheater (3-2) and a secondary superheater (3-1) to enter a high-pressure cylinder of a steam turbine for acting;
working medium which has done work from the high pressure cylinder of the steam turbine flows through the primary reheater (3-5) and the secondary reheater (3-4) to enter the low pressure cylinder of the steam turbine for doing work.
2. Supercritical CO utilization according to claim 1 2 The test boiler for working medium is characterized in that: the hearth (2) is a three-dimensional space formed inside the vertical pipe ring air cooling wall.
3. Supercritical CO utilization according to claim 2 2 The test boiler for working medium is characterized in that: the 10% a working medium is equally divided into two parts, one part of the working medium flows through the superheater side split-flow economizer (3-3), and the other part of the working medium simultaneously flows through the reheater side split-flow economizer (3-6).
4. The use of supercritical CO according to claim 3 2 The test boiler for working medium is characterized in that: the flow a of the working medium is 290t/h.
5. The use of supercritical CO according to claim 4 2 The test boiler for working medium is characterized in that: the temperature of the working medium flowing out of the superheater outlet header after being heated by the primary superheater (3-2) and the secondary superheater (3-1) is 600 ℃.
6. The use of supercritical CO according to claim 5 2 The test boiler for working medium is characterized in that: the temperature of the working medium flowing out of the reheater outlet header after being heated by the primary reheater (3-5) and the secondary reheater (3-4) is 600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811056584.9A CN108844051B (en) | 2018-09-11 | 2018-09-11 | Supercritical CO 2 Test boiler for working medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811056584.9A CN108844051B (en) | 2018-09-11 | 2018-09-11 | Supercritical CO 2 Test boiler for working medium |
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| CN108844051A CN108844051A (en) | 2018-11-20 |
| CN108844051B true CN108844051B (en) | 2023-07-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109442393A (en) * | 2018-09-20 | 2019-03-08 | 哈尔滨锅炉厂有限责任公司 | Supercritical CO2The introducing flue gas recirculation system and round-robin method of pilot boiler |
| CN110566994A (en) * | 2019-09-20 | 2019-12-13 | 哈尔滨锅炉厂有限责任公司 | supercritical carbon dioxide boiler furnace |
| CN111810932A (en) * | 2020-07-21 | 2020-10-23 | 哈尔滨锅炉厂有限责任公司 | Novel supercritical carbon dioxide boiler double-chamber furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104728823B (en) * | 2015-03-17 | 2016-08-03 | 西安热工研究院有限公司 | A kind of Novel supercritical carbon dioxide coal-burning boiler |
| CN106195983B (en) * | 2016-06-30 | 2019-01-04 | 西安热工研究院有限公司 | Coal-fired supercritical carbon dioxide Brayton cycle electricity generation system |
| CN106402831B (en) * | 2016-09-13 | 2018-12-11 | 华能国际电力股份有限公司 | One kind being used for supercritical CO2The double-flue boiler of Brayton cycle electricity generation system |
| CN206036988U (en) * | 2016-09-13 | 2017-03-22 | 华能国际电力股份有限公司 | Take gas recirculation's overcritical CO2 boiler plant |
| CN107906498B (en) * | 2017-10-25 | 2018-12-14 | 东南大学 | Supercritical carbon dioxide circulating fluidized bed combustion coal boiler and its electricity generation system of driving |
| CN108105747B (en) * | 2017-11-29 | 2019-05-31 | 华北电力大学 | Supercritical CO2Brayton cycle coal fired power generation tail portion high-temperature flue gas afterheat utilizing system |
| CN208998043U (en) * | 2018-09-11 | 2019-06-18 | 哈尔滨锅炉厂有限责任公司 | It is a kind of to use supercritical CO2For the new test boiler of working medium |
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