CN105020743A - Fuel autoxidation splitting and axial staged combustion chamber - Google Patents
Fuel autoxidation splitting and axial staged combustion chamber Download PDFInfo
- Publication number
- CN105020743A CN105020743A CN201510412701.0A CN201510412701A CN105020743A CN 105020743 A CN105020743 A CN 105020743A CN 201510412701 A CN201510412701 A CN 201510412701A CN 105020743 A CN105020743 A CN 105020743A
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- Prior art keywords
- fuel
- combustion chamber
- combustion
- autoxidation
- splitting
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 72
- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 238000006701 autoxidation reaction Methods 0.000 title claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000005336 cracking Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 150000003384 small molecules Chemical class 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 239000008246 gaseous mixture Substances 0.000 abstract 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- -1 methane and hydrogen Chemical class 0.000 abstract 1
- 210000002381 plasma Anatomy 0.000 abstract 1
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 12
- 239000003921 oil Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Abstract
The invention provides a fuel autoxidation splitting and axial staged combustion chamber. A fuel is subjected to autoxidation splitting at the head of the combustion chamber, and then enters the combustion chamber to undergo deep combustion to achieve staged combustion of the fuel; the fuel enters the head of the combustion chamber, and is mixed with air, contacted with high temperature plasmas generated in an ionizing channel and oxidized subsequently; the fuel is combusted in fuel-rich state with an equivalence ratio controlled to be greater than 1; heat released due to combustion of a part of fuel is absorbed by the rest of fuel; and the rest of fuel is then split to produce inflammable mixtures of gaseous small molecules such as methane and hydrogen, thereby converting a rich-fuel combustion area of the combustion chamber to a fuel autoxidation splitting area. Thereafter, the high temperature gaseous mixtures enter the combustion chamber, are rapidly mixed with the air entering from a dilution mixing hole to produce a mixture with the equivalence ratio being less than 1, and undergo fuel-lean combustion. According to the combustion chamber, a flame quenching section of the combustion chamber is removed, so that the conversion efficiency is improved; carbon deposition is avoided; and above all, NOx emission of the combustion chamber is reduced.
Description
Technical field
The present invention relates to Thermal Energy and Power Engineering field, particularly relate to the axially staged combustion chamber of a kind of fuel autoxidation cracking.
Background technology
At present, along with the continuous enhancing of environmental consciousness, more and more extensive to the research of this conventional power plants of gas turbine.For meeting the environmental regulation requirement of increasingly stringent, the design of development to engine of modern thrust power is had higher requirement, one of low emission technology trend becoming engine technology developments.
Classification and stratified combustion are the technical ways realizing combustion with reduced pollutants.Grading combustion technology is generally made up of level on duty and main combustion stage.Level on duty ensures flame stabilization, improves the air capacity of main combustion stage as much as possible simultaneously, improves the blending between main combustion stage oil gas.Stratified combustion is by organizing burning to flame structure layering, the ingenious contradiction solving the fuel-lean blowout of NOx emission and idling rating.
RQL (fuel-rich combustion-extinguishing-poor oil firing) combustion chamber is that fractional combustion reduces one of effective scheme of discharge, the basic skills of burning first arranges the combustion zone of a rich oil, the product rapid mixing of then a large amount of air and this combustion zone, mixed equivalent proportion is less than 1, poor oil firing is carried out in region subsequently, after burning completely, combustion gas enters turbine.It is the combustion with reduced pollutants scheme of an air classification in essence.Strengthening the research to the burning of rich oil district and cooling and extinguishing process, is the current research emphasis realizing RQL technology.
Analyze from the current low stain low emissions combustion technical merit be applied to engine, only apply the pollutant emission standard that a kind of low stain low emissions combustion technology has been difficult to reach current rules and regulations.Therefore integrated application multiple low stain low emissions combustion technology, gives full play to these technology advantage separately, is the only way of development present engine low stain low emissions combustion technology.Therefore, herein based on RQL grading combustion technology, propose a kind of mode of tissue burning newly, hope the Combustion chamber design scheme obtaining and there is good discharge performance.
Summary of the invention
The object of the invention is to provide the axially staged combustion chamber of fuel autoxidation cracking that a kind of conversion efficiency is high, can avoid carbon distribution problem, remove the discharge of extinguishing process reduction NOx.
The object of the present invention is achieved like this: comprise cracker, in the housing of cracker, electrode contact is installed, the end of electrode contact stretches in nozzle pipe, and the end of electric machine joint is connected with electrode, the end of electrode is connected with cyclone depression bar, the end of cyclone depression bar is connected with cyclone, the end of nozzle pipe is provided with nozzle, and described cyclone is arranged on nozzle, the upper end of cracker is also vertically provided with oil-in, the end of oil-in communicates with nozzle pipe, described cracker is also fixed with urceolus, described nozzle pipe is provided with inner core, the end face that inner core is connected with nozzle pipe is provided with ionization channels, formed between inner core and urceolus and carry out, the end of inner core is connected with combustion chamber body, combustion chamber body upper end is provided with blending hole.
The present invention also comprises some architectural features like this:
1. described in, nozzle stretches in inner core.
2. electrode contact is connected with power supply by cable.
Compared with prior art, the invention has the beneficial effects as follows: the present invention adopt fuel oil in advance fuel-rich combustion realize the cracking of fuel autoxidation, then imperfect combustion combustion gas is directly sprayed into combustion chamber and carries out poor oil firing, remove extinguishing process, be beneficial to the tissue of burning, avoid carbon distribution problem; Radial direction adds axially staged chamber structure and arranges, contributes to mixing of the fuel gas after cracking and air, improves fuel conversion efficiency, most importantly, and combustion system oil-poor after utilizing first rich oil, effectively reduction combustion chamber NOx emission.Also namely the present invention can improve conversion efficiency, avoids carbon distribution problem, the most important thing is to eliminate extinguishing process, and the premix of fuel gas and the combustion system of inclined equivalent proportion can reduce again the discharge of NOx.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
The present invention is the axially staged combustion chamber based on fuel-rich-extinguishing-Lean burn combustion Technology design, is the combustion chamber of a kind of efficient burning, low emission.
Composition graphs 1, the present invention is the axially staged combustion chamber of a kind of fuel autoxidation cracking, be made up of cracker housing 1, electrode contact 2, electrode 3, cyclone depression bar 4, cyclone 5, ionization channels 6, air intake duct 7, blending hole 8, oil-in 9, nozzle assembly 10, inner core 11, urceolus 12 and combustion chamber body 13, electrode contact 2 is arranged on the left end of cracker, and stube cable is with energising; Electrode 3 is connected on electrode contact 2, and cyclone 5 is arranged on nozzle 9; Cyclone depression bar 4 is arranged between electrode 3 and cyclone 5, is used for fixing cyclone 5; Oil-in 9 is arranged on cracker upper end; Urceolus 12 is connected cracker and nozzle pipe with inner core 11, and inner core and urceolus are arranged on cracker right-hand member, air intake duct 7 between urceolus 12 and inner core 11, for air inlet; On the inner core end face of the air intake duct end of ionization channels 6 between inner/outer tube, ionization channels energising when starting working, produce electric arc, combustion chamber body 13 is arranged on inner core 11 and exports, and blending hole 8 is positioned on combustion chamber body 13.
Fuel-pyrolysis device is positioned at front portion, combustion chamber, and inside and outside sleeve connects cracker, and inner core is connected with combustion chamber.Air enters by air intake duct between inner/outer tube is reverse, after mixing, carries out oxicracking at inner core with fuel oil, and the hot mixture of generation enters combustion chamber and carries out deep combustion.
Fuel of the present invention carries out autoxidation cracking at head of combustion chamber, then enters combustion-chamber depth burning, and then realizes the fractional combustion of fuel.The object of the invention is to, based on RQL (fuel-rich combustion-extinguishing-poor oil firing) grading combustion technology, propose a kind of mode of tissue burning newly.Fuel enters head of combustion chamber and mixes with air, contact with the high-temperature plasma produced in ionization channels and be oxidized thereupon, control equivalent proportion and be greater than 1, fuel is burnt under rich, the heat of part of fuel burning release is absorbed by residual fuel, and then cracking produces the gaseous state small-molecule mixtures such as incendive methane, hydrogen, with this, fuel-rich combustion district of combustion chamber is changed into the autoxidation cracking zone of fuel.After this, high-temperature gas mixture enters in combustion chamber, and the air rapid mixing entered with blending hole produces the mixture that equivalent proportion is less than 1, carries out poor oil firing.The present invention removes combustion chamber extinguishing section, improves conversion efficiency, avoids carbon distribution problem, especially reduces the NOx emission of combustion chamber
Composition graphs 1, time starting working in combustion chamber, cable energising connected by electrode contact 2, air between ionization channels 6 is punctured rear formation electric arc by high-voltage arc, the compressed air of blower outlet is by air intake duct 7, entered by reverse between inner/outer tube, through ionization channels, added thermal ionization by high-temperature electric arc and form plasma; Fuel oil is sprayed by nozzle 10 by cyclone 5, mixes with air, and after gas mixture contacts with high-temperature plasma, burning formation stabilizes the flame rapidly; Hot mixture enters inner core 11, that now carries out in inner core is actually fuel-rich combustion, control equivalent proportion in cavity and be greater than 1, the heat that part oil inflame can be made to produce is absorbed by Fuel Remained, carry out autoxidation cracking process, form incendive high activity short carbon chain component, the rich oil state of this process avoids equivalent proportion burning, effectively reduces the generation of NOx; Hot mixture after cracking enters combustion chamber body 13 via inner core outlet, now hot mixture mixes with the air entered by blending hole rapidly, oil-poor state is changed rapidly into by rich oil state, now carry out regnition, burn away, burning is carried out under the condition of equivalent proportion lower than 1, again avoids equivalent proportion burning, reduces NOx and generates.
Claims (3)
1. the axially staged combustion chamber of fuel autoxidation cracking, it is characterized in that: comprise cracker, in the housing of cracker, electrode contact is installed, the end of electrode contact stretches in nozzle pipe, and the end of electric machine joint is connected with electrode, the end of electrode is connected with cyclone depression bar, the end of cyclone depression bar is connected with cyclone, the end of nozzle pipe is provided with nozzle, and described cyclone is arranged on nozzle, the upper end of cracker is also vertically provided with oil-in, the end of oil-in communicates with nozzle pipe, described cracker is also fixed with urceolus, described nozzle pipe is provided with inner core, the end face that inner core is connected with nozzle pipe is provided with ionization channels, formed between inner core and urceolus and carry out, the end of inner core is connected with combustion chamber body, combustion chamber body upper end is provided with blending hole.
2. the axially staged combustion chamber of a kind of fuel autoxidation according to claim 1 cracking, is characterized in that: described nozzle stretches in inner core.
3. the axially staged combustion chamber of a kind of fuel autoxidation according to claim 1 and 2 cracking, is characterized in that: electrode contact is connected with power supply by cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412701.0A CN105020743B (en) | 2015-07-15 | 2015-07-15 | A kind of fuel autoxidation cracks axially staged combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510412701.0A CN105020743B (en) | 2015-07-15 | 2015-07-15 | A kind of fuel autoxidation cracks axially staged combustion chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105020743A true CN105020743A (en) | 2015-11-04 |
| CN105020743B CN105020743B (en) | 2017-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510412701.0A Expired - Fee Related CN105020743B (en) | 2015-07-15 | 2015-07-15 | A kind of fuel autoxidation cracks axially staged combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105020743B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180075A (en) * | 2017-12-15 | 2018-06-19 | 中国人民解放军空军工程大学 | The rotational slide arc plasma fuel oil splitting decomposition head of aeroengine combustor buring room |
| CN109967460A (en) * | 2019-04-01 | 2019-07-05 | 中国人民解放军战略支援部队航天工程大学 | A kind of engine nozzle carbon distribution minimizing technology based on low temperature plasma |
| CN114526499A (en) * | 2022-01-12 | 2022-05-24 | 西北工业大学 | Two-phase pulse detonation combustion chamber based on rotating sliding arc ignition |
| CN114856813A (en) * | 2022-05-10 | 2022-08-05 | 中国人民解放军空军工程大学 | High-altitude aviation kerosene rotor engine provided with premixing catalytic device |
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- 2015-07-15 CN CN201510412701.0A patent/CN105020743B/en not_active Expired - Fee Related
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| US20040177619A1 (en) * | 2002-09-12 | 2004-09-16 | The Boeing Company | Fluid injector and injection method |
| CN1525101A (en) * | 2003-02-26 | 2004-09-01 | 邱纪林 | Plasma cracking burner |
| CN102175045A (en) * | 2010-12-31 | 2011-09-07 | 北京航空航天大学 | Low-emission combustion chamber with main combustible stage head part multi-point slant oil taking |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180075A (en) * | 2017-12-15 | 2018-06-19 | 中国人民解放军空军工程大学 | The rotational slide arc plasma fuel oil splitting decomposition head of aeroengine combustor buring room |
| CN109967460A (en) * | 2019-04-01 | 2019-07-05 | 中国人民解放军战略支援部队航天工程大学 | A kind of engine nozzle carbon distribution minimizing technology based on low temperature plasma |
| CN114526499A (en) * | 2022-01-12 | 2022-05-24 | 西北工业大学 | Two-phase pulse detonation combustion chamber based on rotating sliding arc ignition |
| CN114856813A (en) * | 2022-05-10 | 2022-08-05 | 中国人民解放军空军工程大学 | High-altitude aviation kerosene rotor engine provided with premixing catalytic device |
| CN114856813B (en) * | 2022-05-10 | 2024-01-12 | 中国人民解放军空军工程大学 | High-altitude aviation kerosene rotor engine provided with premixing catalytic device |
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| Publication number | Publication date |
|---|---|
| CN105020743B (en) | 2017-10-03 |
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Granted publication date: 20171003 |