CN113154437A - Boiler oxygen-enriched combustion system capable of improving oxygen concentration based on magnetization - Google Patents
Boiler oxygen-enriched combustion system capable of improving oxygen concentration based on magnetization Download PDFInfo
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- CN113154437A CN113154437A CN202110424707.5A CN202110424707A CN113154437A CN 113154437 A CN113154437 A CN 113154437A CN 202110424707 A CN202110424707 A CN 202110424707A CN 113154437 A CN113154437 A CN 113154437A
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- Prior art keywords
- magnetic field
- boiler
- oxygen
- magnetization
- oxygen concentration
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 58
- 239000001301 oxygen Substances 0.000 title claims abstract description 58
- 230000005415 magnetization Effects 0.000 title claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 14
- 230000035699 permeability Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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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
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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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
- 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
- F23L7/007—Supplying oxygen or oxygen-enriched air
-
- 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
Abstract
The invention discloses a boiler oxygen-enriched combustion system for improving oxygen concentration based on magnetization, which comprises a magnetic field channel, a steam heater and a secondary fan, wherein the steam heater is positioned in the magnetic field channel, the magnetic field channel is over against the inlet of the secondary fan, the outlet of the secondary fan is communicated with a burner on a boiler, and the system can further reduce NO in the exhaust steam of the boilerXThe content of (a).
Description
Technical Field
The invention belongs to the field of energy conservation and emission reduction of thermal power generation technologies, and relates to a boiler oxygen-enriched combustion system for improving oxygen concentration based on magnetization.
Background
At present, large-scale coal-fired generating sets operated in China have already finished the transformation of ultra-clean emission, it is more difficult to further degrade the emission index through the prior art, namely further reduce NO in the boiler exhaust fumeXThe content of (b) has technical difficulties.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an oxygen-enriched combustion system of a boiler based on magnetization for improving oxygen concentration, which can further reduce NO in exhaust steam of the boilerXThe content of (a).
In order to achieve the purpose, the boiler oxygen-enriched combustion system for improving oxygen concentration based on magnetization comprises a magnetic field channel, a steam heater and a secondary fan, wherein the steam heater is positioned in the magnetic field channel, the magnetic field channel is over against the inlet of the secondary fan, and the outlet of the secondary fan is communicated with a burner on a boiler.
The steam turbine is characterized by further comprising a steam turbine, wherein a steam extraction port of the steam turbine is communicated with an inlet of the steam heater.
The magnetizing force f of the magnetic field channel is:
μ＝(1+4πχ) (2)
wherein μ is the magnetic permeability of air and the vacuum magnetic permeability μ0＝4π×10-7H/m, χ is the volume magnetic susceptibility of the material, O2Has a volume magnetic susceptibility of + 141.3X 10-9，N2Has a volume magnetic susceptibility of-0.39X 10-9，CO2Is not limited toThe magnetic susceptibility is-0.78X 10-9The volume magnetic susceptibility of CO is-0.44X 10-9NO has a volume magnetic susceptibility of 60.3X 10-9Phi is the percentage content of oxygen in the air, and H is the magnetic field intensity.
The heat load of the steam heater satisfies:
wherein chi is the volume magnetic susceptibility of the substance, and T is the air temperature.
The relationship between the oxygen collection intensity and the magnetic field intensity and the external heating load is determined according to equations (1) to (3).
When the secondary air burner works, oxygen is gathered in the air by the magnetic field channel, and then the oxygen forms directional flow under the action of the steam heater, so that the concentration of the oxygen entering an inlet of the secondary air fan is improved, and the oxygen content of secondary air entering the burner is further improved.
The steam heater is located at the rear side of the magnetic field channel.
When the device works, one path of steam is led out from a steam turbine and enters a steam heater, and the steam heater heats air at the rear side of the magnetic field channel, so that oxygen in the air flows.
The invention has the following beneficial effects:
when the boiler oxygen-enriched combustion system based on magnetization for improving oxygen concentration is in specific operation, oxygen is gathered in air by using the magnetic field channel, then directional flow is formed under the action of the steam heater so as to improve the oxygen concentration entering the inlet of the secondary fan, and then the oxygen is sent into a combustor of the boiler through the secondary fan, so that the oxygen content of secondary air entering the combustor is improved, the oxygen-enriched combustion of the boiler is realized, and NO in smoke discharged by the boiler is reducedXThe content of (a), a more excellent emission index is realized; meanwhile, the oxygen content of the secondary air is improved, so that the secondary air quantity can be effectively reduced, the power of a secondary fan and a draught fan is reduced, the plant power consumption rate is reduced, and the purposes of energy conservation and consumption reduction are achieved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view taken at a-a in fig. 1.
Wherein, 1 is a boiler, 2 is a steam turbine, 3 is a combustor, 4 is a secondary fan, 5 is a steam heater, and 6 is a magnetic field channel.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1 and 2, the boiler oxygen-enriched combustion system for increasing oxygen concentration based on magnetization according to the present invention includes a magnetic field channel 6, a steam turbine 2, a steam heater 5 and a secondary fan 4, wherein the steam heater 5 is located in the magnetic field channel 6, the magnetic field channel 6 faces an inlet of the secondary fan 4, an outlet of the secondary fan 4 is communicated with a burner 3 on the boiler 1, a steam extraction port of the steam turbine 2 is communicated with an inlet of the steam heater 5, and the steam heater 5 is located at a rear side of the magnetic field channel 6.
Wherein, the magnetizing force f of the magnetic field channel 6 is:
μ＝(1+4πχ) (2)
wherein μ is the magnetic permeability of air and the vacuum magnetic permeability μ0＝4π×10-7H/m, χ is the volume magnetic susceptibility of the material, O2Has a volume magnetic susceptibility of + 141.3X 10-9，N2Has a volume magnetic susceptibility of-0.39X 10-9，CO2Has a volume magnetic susceptibility of-0.78X 10-9The volume magnetic susceptibility of CO is-0.44X 10-9NO has a volume magnetic susceptibility of 60.3X 10-9Phi is the percentage content of oxygen in the air, and H is the magnetic field intensity.
The heat load of the steam heater 5 satisfies:
wherein chi is the volume magnetic susceptibility of the substance, and T is the air temperature.
The relationship between the oxygen collection intensity and the magnetic field intensity and the external heating load is determined according to equations (1) to (3).
When the secondary air combustion device works, oxygen is gathered in the air by the magnetic field channel 6, then the oxygen forms directional flow under the action of the steam heater 5, so that the concentration of the oxygen entering the inlet of the secondary air fan 4 is improved, the oxygen content of secondary air entering the combustor 3 is further improved, meanwhile, one path of steam is led out from the steam turbine 2 and enters the steam heater 5, and the air on the rear side of the magnetic field channel 6 is heated by the steam heater 5, so that the oxygen in the air forms flow.
The specific working process of the invention is as follows:
in the normal operation process of the unit, the secondary fan 4 is utilized to introduce air nearby the secondary fan into the boiler 1 through the combustor 3 for combustion supporting so as to generate main reheat steam, and then the main reheat steam is sent into the steam turbine 2 for acting and power generation, and the magnetic field flux is increased at the inlet of the secondary fan 4A duct 6 for allowing oxygen in the air near the secondary air fan 4 to be collected in the magnetic field passage 6; a steam heater 5 is additionally arranged at the rear half part of the magnetic field channel 6, and part of steam extracted from the steam turbine 2 is sent into the steam heater 5 to heat the oxygen-enriched air at the rear part of the magnetic field channel 6, so that high-concentration oxygen in the magnetic field channel 6 forms directional flow under the driving of different temperature gradients, the oxygen concentration at the inlet of the secondary fan 4 is improved, the oxygen content of secondary air entering the combustor 3 is further improved, the oxygen-enriched combustion of the boiler 1 is realized, and NO in the smoke discharged by the boiler 1 is reducedXThe power consumption of the secondary fan 4 and the induced draft fan is reduced.
The invention forms the gathering of oxygen in the air based on the magnetized air to improve the oxygen concentration of the secondary air of the boiler 1, further realizes the oxygen-enriched combustion of the boiler 1 and reduces NO in the smoke discharged by the boiler 1XThe content of (a), a more excellent emission index is realized; meanwhile, the oxygen content of the secondary air is improved, the secondary air quantity is effectively reduced, the power of the secondary air fan 4 and the induced draft fan is reduced, the plant power consumption rate is reduced, and the purposes of energy conservation and consumption reduction are achieved.
Claims (8)
1. The utility model provides a boiler oxygen boosting combustion system based on magnetization improves oxygen concentration which characterized in that, includes magnetic field passageway (6), steam heater (5) and overfire fan (4), and wherein, steam heater (5) are located magnetic field passageway (6), and magnetic field passageway (6) just are to the entry of overfire fan (4), and the export of overfire fan (4) is linked together with combustor (3) on boiler (1).
2. An oxycombustion system for a boiler based on magnetization for increasing oxygen concentration according to claim 1, characterized by further comprising a steam turbine (2), wherein the steam extraction port of the steam turbine (2) is connected with the inlet of the steam heater (5).
3. An oxycombustion system for boilers based on magnetization for increasing oxygen concentration according to claim 1, characterized in that the magnetization force f of the magnetic field channel (6) is:
μ＝(1+4πχ) (2)
wherein μ is the magnetic permeability of air and the vacuum magnetic permeability μ0＝4π×10-7H/m, χ is the volume magnetic susceptibility of the material, O2Has a volume magnetic susceptibility of + 141.3X 10-9，N2Has a volume magnetic susceptibility of-0.39X 10-9，CO2Has a volume magnetic susceptibility of-0.78X 10-9The volume magnetic susceptibility of CO is-0.44X 10-9NO has a volume magnetic susceptibility of 60.3X 10-9Phi is the percentage content of oxygen in the air, and H is the magnetic field intensity.
4. An oxycombustion system for a boiler (1) based on magnetization for increasing oxygen concentration according to claim 3, characterized in that the steam heater (5) has a thermal load satisfying:
wherein chi is the volume magnetic susceptibility of the substance, and T is the air temperature.
5. The system of claim 4, wherein the relationship between the oxygen collection intensity and the magnetic field intensity and the external heating load is determined according to the equations (1) to (3).
6. The boiler oxycombustion system for increasing oxygen concentration based on magnetization according to claim 1, characterized in that, in operation, the magnetic field channel (6) is used to make oxygen gather in the air and then form a directional flow under the action of the steam heater (5) to increase the oxygen concentration entering the inlet of the secondary fan (4) and further increase the oxygen content of the secondary air entering the burner (3).
7. An oxycombustion system for a boiler based on magnetization for increasing oxygen concentration according to claim 1, characterized in that the steam heater (5) is located at the rear side of the magnetic field channel (6).
8. An oxycombustion system for a boiler based on magnetization for increasing oxygen concentration according to claim 2, characterized in that, during operation, a steam path is led out from the steam turbine (2) to the steam heater (5), and the air at the back side of the magnetic field channel (6) is heated by the steam heater (5), so that the oxygen in the air forms a flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110424707.5A CN113154437A (en) | 2021-04-20 | 2021-04-20 | Boiler oxygen-enriched combustion system capable of improving oxygen concentration based on magnetization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110424707.5A CN113154437A (en) | 2021-04-20 | 2021-04-20 | Boiler oxygen-enriched combustion system capable of improving oxygen concentration based on magnetization |
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| Publication Number | Publication Date |
|---|---|
| CN113154437A true CN113154437A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110424707.5A Pending CN113154437A (en) | 2021-04-20 | 2021-04-20 | Boiler oxygen-enriched combustion system capable of improving oxygen concentration based on magnetization |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2472804Y (en) * | 2000-08-22 | 2002-01-23 | 李学金 | Magnetic heating oxygen enriching device |
| CN2769705Y (en) * | 2004-09-22 | 2006-04-05 | 于轩 | Local aerating and combustion aiding device for industrial kiln |
| CN1986436A (en) * | 2006-12-21 | 2007-06-27 | 华北电力大学 | Gradient magnetic field process and apparatus for raising content of oxygen dissolved in water |
| CN101701724A (en) * | 2009-11-02 | 2010-05-05 | 华北电力大学 | Gas stove cooker supporting device assembled with permanent magnet |
| JP2012073016A (en) * | 2010-09-01 | 2012-04-12 | Masashi Senba | Thermal decomposition device |
| CN102927566A (en) * | 2012-11-15 | 2013-02-13 | 辽宁省电力有限公司电力科学研究院 | Correcting method for secondary air quantity curve of conventional boiler after local oxygen-enriched combustion transformation |
| CN104792218A (en) * | 2015-04-22 | 2015-07-22 | 浙江大学 | Method and device for utilizing magneto-thermal convection to intensify low-temperature oxygen-containing fluid heat transfer |
| CN109107326A (en) * | 2018-09-12 | 2019-01-01 | 哈尔滨工业大学 | A kind of adjustable high-gradient magnetic field oxygen enriching method |
| CN111723475A (en) * | 2020-06-01 | 2020-09-29 | 河海大学 | Wind power, photovoltaic and heat storage combined thermoelectric system and capacity optimization modeling method |
-
2021
- 2021-04-20 CN CN202110424707.5A patent/CN113154437A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2472804Y (en) * | 2000-08-22 | 2002-01-23 | 李学金 | Magnetic heating oxygen enriching device |
| CN2769705Y (en) * | 2004-09-22 | 2006-04-05 | 于轩 | Local aerating and combustion aiding device for industrial kiln |
| CN1986436A (en) * | 2006-12-21 | 2007-06-27 | 华北电力大学 | Gradient magnetic field process and apparatus for raising content of oxygen dissolved in water |
| CN101701724A (en) * | 2009-11-02 | 2010-05-05 | 华北电力大学 | Gas stove cooker supporting device assembled with permanent magnet |
| JP2012073016A (en) * | 2010-09-01 | 2012-04-12 | Masashi Senba | Thermal decomposition device |
| CN102927566A (en) * | 2012-11-15 | 2013-02-13 | 辽宁省电力有限公司电力科学研究院 | Correcting method for secondary air quantity curve of conventional boiler after local oxygen-enriched combustion transformation |
| CN104792218A (en) * | 2015-04-22 | 2015-07-22 | 浙江大学 | Method and device for utilizing magneto-thermal convection to intensify low-temperature oxygen-containing fluid heat transfer |
| CN109107326A (en) * | 2018-09-12 | 2019-01-01 | 哈尔滨工业大学 | A kind of adjustable high-gradient magnetic field oxygen enriching method |
| CN111723475A (en) * | 2020-06-01 | 2020-09-29 | 河海大学 | Wind power, photovoltaic and heat storage combined thermoelectric system and capacity optimization modeling method |
Non-Patent Citations (1)
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Application publication date: 20210723 |