CN111810932A - Novel supercritical carbon dioxide boiler double-chamber furnace - Google Patents
Novel supercritical carbon dioxide boiler double-chamber furnace Download PDFInfo
- Publication number
- CN111810932A CN111810932A CN202010707729.8A CN202010707729A CN111810932A CN 111810932 A CN111810932 A CN 111810932A CN 202010707729 A CN202010707729 A CN 202010707729A CN 111810932 A CN111810932 A CN 111810932A
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- CN
- China
- Prior art keywords
- carbon dioxide
- supercritical carbon
- flue gas
- flue
- cooling chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/08—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass at critical or supercritical pressure values
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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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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention relates to the field of boilers, in particular to a novel supercritical carbon dioxide boiler double-chamber furnace, which aims to solve the problems that the temperature of a working medium at the inlet of a supercritical carbon dioxide boiler is high, and a conventional chamber furnace structure has a large risk during variable load operation and is easy to cause overtemperature tube explosion accidents; the last-stage heating surface is arranged inside the outlet end of the flue, so that a high-heat-load flue gas area can be coupled with a supercritical carbon dioxide working medium low-temperature area, safe and reliable sealing of the hearth is guaranteed while heat exchange is guaranteed, and meanwhile, expansion joints are arranged at flue gas inlets and outlets of the flue gas cooling chamber and can absorb self expansion of the flue gas cooling chamber, so that the follow-up flue can be conveniently and freely arranged.
Description
Technical Field
The invention relates to the field of boilers, in particular to a novel supercritical carbon dioxide boiler double-chamber boiler.
Background
The Brayton cycle with supercritical carbon dioxide as the working medium has wide development prospect, and can be applied to various industries such as aerospace, power generation and the like in the future. The supercritical carbon dioxide boiler has the characteristic of high temperature of an inlet working medium, meanwhile, as the supercritical carbon dioxide is taken as gas, the heat exchange coefficient with the pipe wall is obviously lower than that of water under the same mass flow rate, the small-capacity supercritical carbon dioxide boiler has poorer cooling capacity on the metal wall surface due to small flow of the working medium, and a conventional chamber combustion furnace structure is adopted, so that the large risk exists particularly in variable-load operation, and the overtemperature pipe explosion accident is easily caused.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a novel double-chamber furnace of a supercritical carbon dioxide boiler, aiming at solving the problems that the temperature of an inlet working medium of the supercritical carbon dioxide boiler is high, the heat exchange coefficient of supercritical carbon dioxide as gas and a pipe wall is obviously lower than that of water under the same mass flow rate, the cooling capacity of a metal wall surface is poorer due to small flow of a small-capacity supercritical carbon dioxide boiler working medium, and the adoption of a conventional chamber furnace structure has greater risk during variable load operation and is easy to cause overtemperature tube explosion accidents.
The invention content is as follows: a novel double-chamber furnace of a supercritical carbon dioxide boiler comprises a combustion chamber, a flue gas radiation cooling chamber, a flue, a final stage heating surface, a supercritical carbon dioxide inlet header and a supercritical carbon dioxide outlet header;
the flue gas radiation cooling chamber is vertically arranged, the bottom end of the flue gas radiation cooling chamber is connected with the smoke exhaust end of the combustion chamber, the upper end of the flue gas radiation cooling chamber is connected with the inlet end of the flue, the lower part of the flue gas radiation cooling chamber is provided with a supercritical carbon dioxide inlet header, and the upper part of the flue gas radiation cooling chamber is provided with a supercritical carbon dioxide outlet header;
the flue is arranged from the inlet end to the outlet end downwards, and a final-stage heating surface is arranged inside the flue.
Furthermore, an expansion joint I is arranged between the combustion chamber and the flue gas radiation cooling chamber.
Still further, the expansion joint I is a high temperature resistant expansion joint.
And furthermore, an expansion joint II is arranged between the smoke radiation cooling chamber and the flue.
Further, the flue is a casting flue.
Still further, the lateral part of the upper end of the flue gas radiation cooling chamber is connected with the inlet end of the flue.
Further, the flue gas radiation cooling chamber is composed of a metal membrane wall cooled by supercritical carbon dioxide.
Has the advantages that: the arrangement scheme of the small-capacity supercritical carbon dioxide double-chamber furnace capable of adapting to the variable load operation is designed, the coupling of a high-heat-load area of flue gas and a low-temperature area of a supercritical carbon dioxide working medium can be realized, the furnace is safe and reliable to seal while heat exchange is ensured, and meanwhile, an expansion joint is arranged at a flue gas inlet and a flue gas outlet of a flue gas cooling chamber and can absorb the self expansion of the flue gas cooling chamber, so that the follow-up flue can be conveniently and.
Drawings
FIG. 1 is a schematic diagram of the structure of the inventive product;
fig. 2 is a schematic view of fig. 1 from direction a-a.
Detailed Description
The first embodiment is as follows: a novel double-chamber furnace of a supercritical carbon dioxide boiler comprises a combustion chamber 1, a flue gas radiation cooling chamber 3, a flue 5, a final stage heating surface 6, a supercritical carbon dioxide inlet header 7 and a supercritical carbon dioxide outlet header 8;
the flue gas radiation cooling chamber 3 is vertically arranged, the bottom end of the flue gas radiation cooling chamber 3 is connected with the smoke exhaust end of the combustion chamber 1, the upper end of the flue gas radiation cooling chamber 3 is connected with the inlet end of the flue 5, the lower part of the flue gas radiation cooling chamber 3 is provided with a supercritical carbon dioxide inlet header 7, and the upper part of the flue gas radiation cooling chamber 3 is provided with a supercritical carbon dioxide outlet header 8;
the flue 5 is arranged from the inlet end to the outlet end downwards, and a final heating surface 6 is arranged inside the flue 5.
The combustion chamber 1 comprises a combustor, an ignition gun, a fire detector, a refractory masonry cavity and other components and is responsible for building a combustion space; the flue gas radiation cooling chamber 3 carries out radiation cooling on flue gas generated by the combustion chamber 1, meanwhile, low-temperature supercritical carbon dioxide enters from the supercritical carbon dioxide inlet header 7, the flue gas entering the boiler also enters from the bottom of the flue gas radiation cooling chamber 3, so that a high heat load area is matched with a low supercritical carbon dioxide temperature area, overtemperature failure caused by overhigh temperature of the wall surface of the cooling chamber can be effectively reduced, the low-temperature supercritical carbon dioxide is heated and then discharged from the supercritical carbon dioxide outlet header 8, and the flue gas enters the flue 5 after passing through the flue gas radiation cooling chamber 3 and finally exchanges heat with the final heating surface 6.
In the second concrete implementation mode, an expansion joint I2 is arranged between the combustion chamber 1 and the flue gas radiation cooling chamber 3.
Other embodiments are the same as the first embodiment.
The third concrete implementation mode: the expansion joint I2 is a high-temperature-resistant expansion joint.
Other embodiments are the same as the first embodiment.
The fourth embodiment; and a second expansion joint 4 is arranged between the smoke radiation cooling chamber 3 and the flue 5.
Other embodiments are the same as the first embodiment.
The fifth concrete implementation mode: the flue 5 is a casting material flue.
Other embodiments are the same as the first embodiment.
The sixth specific implementation mode: the side part of the upper end of the smoke radiation cooling chamber 3 is connected with the inlet end of a flue 5.
Other embodiments are the same as the first embodiment.
The seventh embodiment: the flue gas radiation cooling chamber 3 is formed by a metal membrane wall cooled by supercritical carbon dioxide.
Other embodiments are the same as the first embodiment.
The working principle is as follows: the two processes of combustion and heat exchange are separated, and the boiler is divided into three parts: a combustion chamber 1, a flue gas radiation cooling chamber 3 and a final stage heating surface 6. The combustion chamber 1 comprises a combustor, an ignition gun, a fire detector, a refractory masonry cavity and other parts and is responsible for building a combustion space. The combustion chamber 1 passes through an expansion joint 2 (high temperature resistant expansion joint) and a flue gas radiation cooling chamber 3. The flue gas radiation cooling chamber 3 is a cavity formed by a metal membrane wall cooled by supercritical carbon dioxide. The flue gas radiation cooling chamber 3 is connected with a flue 5 (a tail castable flue) through an expansion joint 4 (a nonmetal expansion joint), and a final-stage heating surface 6 is arranged in the flue 5. The fuel (gas, fuel) accomplishes the burning in combustion chamber 1, and the high temperature flue gas that the burning produced gets into flue gas radiation cooling chamber 3 and carries out the heat transfer with the heat radiation mode, gets into the boiler supercritical carbon dioxide in flue gas radiation cooling chamber 3 and carries out primary heating simultaneously, and the high temperature flue gas temperature after the burning reduces. Because the flue gas enters from the flue gas radiation cooling chamber 3, the heat load trend of the wall surface of the whole cooling chamber is basically linearly reduced along the flow direction of the flue gas, and the low-temperature supercritical carbon dioxide entering the boiler also enters from the flue gas radiation cooling chamber 3, so that a high heat load area is matched with a low supercritical carbon dioxide temperature area, the overtemperature failure caused by overhigh wall surface temperature of the cooling chamber can be effectively reduced, and the safety of the boiler under variable load is improved. Flue gas enters the tail pouring material flue 5 from the outlet of the flue gas cooling chamber to carry out heat convection with the final heating surface 6, and carbon dioxide is heated to the rated required design temperature and then discharged.
Claims (7)
1. A novel supercritical carbon dioxide boiler double-chamber furnace is characterized in that: the device comprises a combustion chamber (1), a flue gas radiation cooling chamber (3), a flue (5), a final heating surface (6), a supercritical carbon dioxide inlet header (7) and a supercritical carbon dioxide outlet header (8);
the flue gas radiation cooling chamber (3) is vertically arranged, the bottom end of the flue gas radiation cooling chamber (3) is connected with the smoke exhaust end of the combustion chamber (1), the upper end of the flue gas radiation cooling chamber (3) is connected with the inlet end of the flue (5), the lower part of the flue gas radiation cooling chamber (3) is provided with a supercritical carbon dioxide inlet header (7), and the upper part of the flue gas radiation cooling chamber (3) is provided with a supercritical carbon dioxide outlet header (8);
the flue (5) is arranged downwards from the inlet end to the outlet end, and a final stage heating surface (6) is arranged inside the flue (5).
2. The novel supercritical carbon dioxide boiler double-chamber furnace as claimed in claim 1, characterized in that: and a first expansion joint (2) is arranged between the combustion chamber (1) and the flue gas radiation cooling chamber (3).
3. The novel supercritical carbon dioxide boiler double-chamber furnace as claimed in claim 2, characterized in that: the expansion joint I (2) is a high-temperature-resistant expansion joint.
4. The novel supercritical carbon dioxide boiler double-chamber furnace as claimed in claim 1, characterized in that: and a second expansion joint (4) is arranged between the smoke radiation cooling chamber (3) and the flue (5).
5. The novel supercritical carbon dioxide boiler double-chamber furnace as claimed in claim 1, characterized in that: the flue (5) is a casting material flue.
6. The novel supercritical carbon dioxide boiler double-chamber furnace as claimed in claim 1, characterized in that: the side part of the upper end of the smoke radiation cooling chamber (3) is connected with the inlet end of the flue (5).
7. The novel supercritical carbon dioxide boiler double-chamber furnace as claimed in claim 1, characterized in that: the flue gas radiation cooling chamber (3) is composed of a metal membrane wall cooled by supercritical carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707729.8A CN111810932A (en) | 2020-07-21 | 2020-07-21 | Novel supercritical carbon dioxide boiler double-chamber furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707729.8A CN111810932A (en) | 2020-07-21 | 2020-07-21 | Novel supercritical carbon dioxide boiler double-chamber furnace |
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| CN111810932A true CN111810932A (en) | 2020-10-23 |
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| CN202010707729.8A Pending CN111810932A (en) | 2020-07-21 | 2020-07-21 | Novel supercritical carbon dioxide boiler double-chamber furnace |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205897089U (en) * | 2016-08-10 | 2017-01-18 | 华能国际电力股份有限公司 | Furnace structure of single reheating supercritical carbon dioxide boiler |
| CN107191921A (en) * | 2017-06-29 | 2017-09-22 | 华能国际电力股份有限公司 | Oxygen-enriched combustion supercritical carbon dioxide cyclone furnace |
| CN108844051A (en) * | 2018-09-11 | 2018-11-20 | 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 |
| CN108916847A (en) * | 2018-07-13 | 2018-11-30 | 西安热工研究院有限公司 | Using the heat convection supercritical carbon dioxide boiler of large scale flue gas recirculation |
| 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 |
-
2020
- 2020-07-21 CN CN202010707729.8A patent/CN111810932A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205897089U (en) * | 2016-08-10 | 2017-01-18 | 华能国际电力股份有限公司 | Furnace structure of single reheating supercritical carbon dioxide boiler |
| CN107191921A (en) * | 2017-06-29 | 2017-09-22 | 华能国际电力股份有限公司 | Oxygen-enriched combustion supercritical carbon dioxide cyclone furnace |
| CN108916847A (en) * | 2018-07-13 | 2018-11-30 | 西安热工研究院有限公司 | Using the heat convection supercritical carbon dioxide boiler of large scale flue gas recirculation |
| CN108844051A (en) * | 2018-09-11 | 2018-11-20 | 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 |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 编委会: "《四川白马300MW循环流化床示范工程总结》", 31 December 2007, 中国电力出版社 * |
| 薛群虎: "《耐火材料》", 30 September 2009, 冶金工业出版社 * |
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Application publication date: 20201023 |