CN104266188A - Gas oxygen-enriched supporting premixed swirl-flow combustion device - Google Patents
Gas oxygen-enriched supporting premixed swirl-flow combustion device Download PDFInfo
- Publication number
- CN104266188A CN104266188A CN201410547634.9A CN201410547634A CN104266188A CN 104266188 A CN104266188 A CN 104266188A CN 201410547634 A CN201410547634 A CN 201410547634A CN 104266188 A CN104266188 A CN 104266188A
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- Prior art keywords
- pipe
- jet
- gas
- combustion
- premixed
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/007—Mixing tubes, air supply regulation
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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
Abstract
The invention relates to a gas oxygen-enriched supporting premixed swirl-flow combustion device and aims at effectively solving the problem that an existing combustor is unsuitable for oxygen-enriched combustion supporting. A premixed combustion channel communicate with a premixed gas flow device is arranged on the wall of the lower part of a combustion chamber; the premixed gas flow device is composed of an oxygen-enriched air jet pipe, a gas nozzle pipe outside the oxygen-enriched air jet pipe and an air nozzle pipe outside the gas nozzle pipe, all of which are stacked on each other in a sleeving manner; the lower orifice of an air inlet pipe is communicated with the air nozzle pipe, while the upper orifice of the air inlet pipe extends upwards; air jet holes are formed in the circumferential wall of the inner end of the gas nozzle pipe; the upper orifice of a gas inlet pipe is communicated with the gas nozzle pipe, while the lower orifice of the gas inlet pipe extends downwards; a gas flow regulating jet pipe is mounted on the top of the wall of the combustion chamber; a combustion chamber outlet is formed in the bottom of the combustion chamber. The gas oxygen-enriched supporting premixed swirl-flow combustion device is capable of saving the fuel, saving the investment, reducing the temperature of the exhaust gas and the emission quantity of harmful gases, and reducing the environmental pollution.
Description
Technical field
The present invention relates to the burner of industrial furnace, be specially adapted to a kind of gas oxygen-enriched combustion-supporting premixed swirl combustion device of the heating furnace (or hot-blast stove) of burn gas fuel.
Background technology
Current, industrial furnace is considered to require to obtain high temperature, samming, current-sharing and high-performance under lower heat of combustion coal gas from energy-saving and cost-reducing, finally to reach efficiently, energy-saving and environmental protection, volume increase object.For this reason, in industrial furnace, except the boiler flow field that the combustion process that must realize optimizing combines with the diabatic process of strengthening, also need to adopt the combustion technology of oxygen-enriched combustion-supporting.This just relates to the structure of related burner and combustion chamber, and mutual reasonable disposition, thus produces good technique effect.Always there is the structural various problem caused because of design concept problem in the burner making a general survey of the various blast funnace hot blast stoves used at present, this just certainly will cause coal gas to mix uneven, incomplete combustion with air; When coordinating inappropriate at burner with the position of the bags, there will be again uneven, the problem such as combustion intensity is low of uncertain, the air flow method of air velocity distribution feature in combustion chamber; Such burner and the chamber structure coordinated with it, even if be also difficult to reach desirable hot working effect when adopting oxygen-enriched combustion-supporting mode.Therefore, must adopt the relevant burner structure that is suitable for oxygen-enriched combusting and with it domination and chamber structure---burner structure, thus produce good combustion efficiency and rational flow field structure.
Summary of the invention
For above-mentioned situation, for overcoming prior art defect, the object of the present invention is just to provide a kind of gas oxygen-enriched combustion-supporting premixed swirl combustion device, effectively can solve the problem that current burner can not be applicable to oxygen-enriched combustion-supporting.
The technical solution used in the present invention is, comprise combustion chamber body of wall, combustion chamber, premixed flow device, gas inlet pipe, air intake duct, jet for gas pipe, air nozzle pipe, oxygen-enriched air jet pipe, premixed combustion passage, gas flow modulation jet pipe and combustor exit, combustion chamber body of wall to be connected with the tubular body of wall of lower vertical by the spherical vault on top to form, the inside of combustion chamber body of wall is combustion chamber, combustion chamber lower wall body there is the premixed combustion passage tilted with the horizontal direction of combustion chamber, the other end of premixed combustion passage stretches out combustion chamber body of wall, be connected with telescopic premixed flow device, premixed flow device is by the different oxygen-enriched air jet pipe of diameter, the jet for gas pipe of oxygen-enriched air jet pipe outside and the air nozzle pipe of jet for gas pipe outside coaxially stepped be nested in together with the sleeve-like configuration that forms, oxygen-enriched air jet pipe is elongated tubular construction, jet for gas pipe is convergent tubular structure, air nozzle pipe is cylindrical shape, the end opening of air intake duct is connected with air nozzle pipe is vertical, the suitable for reading of air intake duct protrudes upward, outer annular slot is formed between air nozzle pipe and jet for gas pipe, internal layer annular slot is formed between jet for gas pipe and oxygen-enriched air jet pipe, circumferentially multiple air jet orifices on the inner perisporium of jet for gas pipe, gas inlet pipe is placed in outside air nozzle pipe, the suitable for reading of gas inlet pipe is connected with jet for gas pipe is vertical, the end opening of gas inlet pipe stretches out downwards, the top that gas flow modulation jet pipe is contained in the spherical vault of combustion chamber body of wall is coaxially connected with combustion chamber, the tubular body of wall coaxial sleeve of bottom and combustion chamber body of wall that combustor exit is contained in combustion chamber is connected together.
The present invention is the mend gene done on the basis of industrial furnace burner existing structure, intersect the employing of the pre-dark mode of multiply air-spray and coal gas jet in the same way, the injection pre-mixing concepts of oxygen enrichment injection is added in conjunction with coal gas jet-core region, with the abundant premixed completely between the multithread stock jet formed and between many circular layers jet, and then premixed flow enters combustion chamber through premixed combustion passage with cyclone mode, and complete combustion process by regulating the effect of throughput wherein, thus the high temperature preheating effectively realizing stepped mixing and the oxygen-enriched combustion-supporting fast and uniformly of industrial furnace burner burns, effectively improve the stability of combustion intensity and burning.After industrial furnace adopts the burner of this oxygen-enriched combusting, effectively ensureing that efficient, combustion temperatures, high-heat strength under industrial furnace safety and stablization prerequisite run.To reduce investment outlay because of the simplification of burner cost about about 15%, the fuel saving about 10% because effectively reducing EGT, the discharge capacity of nitrogen oxide (NOx) is effectively reduced because of oxygen-enriched combusting, and reduce combustible gas (CO, CnHm etc.) evil gas purging amount because burning completely, thus reduce the pollution to environment.
Accompanying drawing explanation
Fig. 1 is sectional front view of the present invention.
Fig. 2 is that the A-A of Fig. 1 of the present invention is to cross sectional plan view.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figures 1 and 2, the present invention includes combustion chamber body of wall 1, combustion chamber 2, premixed flow device 3, and on gas inlet pipe 4, air intake duct 5, jet for gas pipe 4a, air nozzle pipe 5a, oxygen-enriched air jet pipe 6, premixed combustion passage 7, gas flow modulation jet pipe 8 and combustor exit 9, combustion chamber body of wall 1 to be connected with the tubular body of wall of lower vertical by the spherical vault on top to form, the inside of combustion chamber body of wall is combustion chamber 2, combustion chamber 2 lower wall body there is the premixed combustion passage 7 tilted with the horizontal direction of combustion chamber, the other end of premixed combustion passage stretches out combustion chamber body of wall, be connected with telescopic premixed flow device 3, premixed flow device is by the different oxygen-enriched air jet pipe 6 of diameter, the jet for gas pipe 4a of oxygen-enriched air jet pipe outside and the air nozzle pipe 5a of jet for gas pipe outside coaxially stepped be nested in together with the sleeve-like configuration that forms, oxygen-enriched air jet pipe 6 is elongated tubular construction, jet for gas pipe 4a is convergent tubular structure, air nozzle pipe 5a is cylindrical shape, the end opening of air intake duct 5 is connected with air nozzle pipe is vertical, the suitable for reading of air intake duct protrudes upward, outer annular slot is formed between air nozzle pipe 5a and jet for gas pipe 4a, internal layer annular slot is formed between jet for gas pipe and oxygen-enriched air jet pipe, circumferentially multiple air jet orifices 5b on the inner perisporium of jet for gas pipe, gas inlet pipe 4 is placed in outside air nozzle pipe, the suitable for reading of gas inlet pipe is connected with jet for gas pipe is vertical, the end opening of gas inlet pipe stretches out downwards, the top that gas flow modulation jet pipe 8 is contained in the spherical vault of combustion chamber body of wall is coaxially connected with combustion chamber 2, the tubular body of wall coaxial sleeve of bottom and combustion chamber body of wall that combustor exit 9 is contained in combustion chamber is connected together.
Described combustion chamber body of wall 1 is the cylindrical shape that the refractory masses of metal shell inwall being built high temperature resistant 1300 DEG C ~ 1500 DEG C by laying bricks or stones is formed, the andalusite high-alumina brick strong by thermal shock resistance or brick internal layer, the skin that become by light-weight refractory brick masonry built up of dichroite-mullite, and the ceramic fiber cotton of outer outside and sprayed coating combine formation from inside to outside successively.
Described premixed combustion passage 7 forms eccentric circular duct by the strong andalusite high-alumina brick of thermal shock resistance or dichroite-mullite brick masonry, and premixed combustion passage and combustion chamber are that tangent shape is communicated with, the orthogonal thereto shape of central axis of central axis and combustion chamber.
Described premixed flow device 3 is by building the three layers of sleeve type structure formed in heat-resisting cast iron or heat resisting steel or metal shell with refractory material, internal layer is oxygen-enriched air jet pipe 6, intermediate layer is jet for gas pipe 4a, skin is air nozzle pipe 5a, the inner of air nozzle pipe and the external part of premixed combustion passage are docking together, and outer end is closed; The inner of jet for gas pipe puts in air nozzle pipe 5a inside, and be contained on the external part of premixed combustion passage, be connected with premixed combustion passage, the outer end of jet for gas pipe is closed; The inner of oxygen-enriched air jet pipe puts in jet for gas pipe inside, and be connected with jet for gas pipe, there is air inlet outer end.
The inner of described jet for gas pipe 4a is docking together by the osculum end of the first tubaeform jet pipe and the second tubaeform jet pipe and forms, the big opening end of the first tubaeform jet pipe is connected with premixed combustion passage, the big opening end of the second tubaeform jet pipe is connected with the outer end of jet for gas pipe 4a, the length of the first tubaeform jet pipe is less than the length of the second tubaeform jet pipe, and the tube wall circumference circumference of the first tubaeform jet pipe is evenly equipped with multiple air jet orifices 5b.
Between the axis of described air jet orifices 5b and jet for gas pipe 4a, angle is 20 ° ~ 45 °.
The outer end of described jet for gas pipe 4a is cylindrical shape.
During use, coal gas enters jet for gas pipe 4a by gas inlet pipe 4, oxygen-enriched air directly enters oxygen-enriched air jet pipe 6, combustion air enters air nozzle pipe 5a by air intake duct 5, enter circumferential uniform air jet orifices 5b again, and enter premixed combustion passage 7 simultaneously, here centre coal gas mixes while be preheated and first ignition with oxygen-enriched air, the high-temperature flue gas preheating immediately produced is just at coal gas and the combustion air of surrounding mixing, and make its also initial burning burning, then combustion chamber 2 is entered together, mixing and combustion process is completed in swirling two-phase flows, according to be oxygen debt combustion system, its supplementary air or oxygen-enriched air enter combustion chamber by the gas flow modulation jet pipe 8 of top of combustion chamber, combustion process has been continued mixing with the coal gas in flue gas, enter in the heat utilization device of industrial furnace thereupon through combustor exit 9.
Obviously, for adopting the industrial furnace of other gas combustion apparatus, the burner proposed based on the present invention to be mixed with the high-speed jet of oxygen-enriched air by coal gas and the combination of coal gas and combustion air rill stock jet mixing, achieve high speed pre-mixing prior to rill stock jet premixed ignition, and play preheating rill stock jet premixed air-flow and make its ignition, so as to improving the stability of combustion flame and the graded properties of combustion process, and guarantee the efficient of whole combustion process and high strength.
The present invention is the present situation in order to adapt to gaseous fuel oxygen-enriched combustion-supporting, the burner realizing good admixture between a kind of coal gas, combustion air, oxygen-enriched air (or pure oxygen) is proposed, effectively can complete the classification Homogeneous phase mixing of air-flow, the reasonable layout in premixed flow flow field, and being uniformly distributed of flue gas flow field, thus improve ignition temperature, accelerate burn rate, promote burning completely, reduce excess air coefficient and improve the heat utilization efficiency etc. of heat utilization equipment.In addition, the present invention also can effectively reduce the structure space of combustion chamber and even heat utilization device while improving combustion process.
Claims (7)
1. a gas oxygen-enriched combustion-supporting premixed swirl combustion device, comprise combustion chamber body of wall (1), combustion chamber (2), premixed flow device (3), gas inlet pipe (4), air intake duct (5), jet for gas pipe (4a), air nozzle pipe (5a), oxygen-enriched air jet pipe (6), premixed combustion passage (7), gas flow modulation jet pipe (8) and combustor exit (9), it is characterized in that, combustion chamber body of wall (1) to be connected with the tubular body of wall of lower vertical by the spherical vault on top to form, the inside of combustion chamber body of wall is combustion chamber (2), combustion chamber (2) lower wall body there is the premixed combustion passage (7) tilted with the horizontal direction of combustion chamber, the other end of premixed combustion passage stretches out combustion chamber body of wall, be connected with telescopic premixed flow device (3), premixed flow device is by the different oxygen-enriched air jet pipe (6) of diameter, the jet for gas pipe (4a) of oxygen-enriched air jet pipe outside and the air nozzle pipe (5a) of jet for gas pipe outside is coaxially stepped is nested in the sleeve-like configuration formed together, oxygen-enriched air jet pipe (6) is elongated tubular construction, jet for gas pipe (4a) is convergent tubular structure, air nozzle pipe (5a) is cylindrical shape, the end opening of air intake duct (5) is connected with air nozzle pipe is vertical, the suitable for reading of air intake duct protrudes upward, outer annular slot is formed between air nozzle pipe (5a) and jet for gas pipe (4a), internal layer annular slot is formed between jet for gas pipe and oxygen-enriched air jet pipe, circumferentially multiple air jet orifices (5b) on the inner perisporium of jet for gas pipe, gas inlet pipe (4) is placed in outside air nozzle pipe, the suitable for reading of gas inlet pipe is connected with jet for gas pipe is vertical, the end opening of gas inlet pipe stretches out downwards, the top that gas flow modulation jet pipe (8) is contained in the spherical vault of combustion chamber body of wall is coaxially connected with combustion chamber (2), the tubular body of wall coaxial sleeve of bottom and combustion chamber body of wall that combustor exit (9) is contained in combustion chamber is connected together.
2. gas oxygen-enriched combustion-supporting premixed swirl combustion device according to claim 1, it is characterized in that, the cylindrical shape that described combustion chamber body of wall (1) is formed for the refractory masses of metal shell inwall being built high temperature resistant 1300 DEG C ~ 1500 DEG C by laying bricks or stones, the andalusite high-alumina brick strong by thermal shock resistance or brick internal layer, the skin that become by light-weight refractory brick masonry built up of dichroite-mullite, and the ceramic fiber cotton of outer outside and sprayed coating combine formation from inside to outside successively.
3. gas oxygen-enriched combustion-supporting premixed swirl combustion device according to claim 1, it is characterized in that, described premixed combustion passage (7) forms eccentric circular duct by the strong andalusite high-alumina brick of thermal shock resistance or dichroite-mullite brick masonry, premixed combustion passage and combustion chamber are that tangent shape is communicated with, the orthogonal thereto shape of central axis of central axis and combustion chamber.
4. gas oxygen-enriched combustion-supporting premixed swirl combustion device according to claim 1, it is characterized in that, described premixed flow device (3) is by building the three layers of sleeve type structure formed in heat-resisting cast iron or heat resisting steel or metal shell with refractory material, internal layer is oxygen-enriched air jet pipe (6), intermediate layer is jet for gas pipe (4a), skin is air nozzle pipe (5a), and the inner of air nozzle pipe and the external part of premixed combustion passage are docking together, and outer end is closed; The inner of jet for gas pipe puts in air nozzle pipe (5a) inside, and be contained on the external part of premixed combustion passage, be connected with premixed combustion passage, the outer end of jet for gas pipe is closed; The inner of oxygen-enriched air jet pipe puts in jet for gas pipe inside, and be connected with jet for gas pipe, there is air inlet outer end.
5. gas oxygen-enriched combustion-supporting premixed swirl combustion device according to claim 1, it is characterized in that, the inner of described jet for gas pipe (4a) is docking together by the osculum end of the first tubaeform jet pipe and the second tubaeform jet pipe and forms, the big opening end of the first tubaeform jet pipe is connected with premixed combustion passage, the big opening end of the second tubaeform jet pipe is connected with the outer end of jet for gas pipe (4a), the length of the first tubaeform jet pipe is less than the length of the second tubaeform jet pipe, and the tube wall circumference circumference of the first tubaeform jet pipe is evenly equipped with multiple spray orifice (5b).
6. gas oxygen-enriched combustion-supporting premixed swirl combustion device according to claim 5, is characterized in that, between described air jet orifices (5b) and the axis of jet for gas pipe (4a), angle is 20 ° ~ 45 °.
7. gas oxygen-enriched combustion-supporting premixed swirl combustion device according to claim 5, is characterized in that, the outer end of described jet for gas pipe (4a) is cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410547634.9A CN104266188B (en) | 2014-10-16 | 2014-10-16 | Gas oxygen-enriched combustion-supporting premixed swirl combustion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410547634.9A CN104266188B (en) | 2014-10-16 | 2014-10-16 | Gas oxygen-enriched combustion-supporting premixed swirl combustion device |
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| CN104266188A true CN104266188A (en) | 2015-01-07 |
| CN104266188B CN104266188B (en) | 2016-07-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196054A (en) * | 2016-08-06 | 2016-12-07 | 陈维汉 | The cyclone classification of a kind of center water conservancy diversion regulation and the burner of temperature-controllable |
| CN107062212A (en) * | 2017-05-22 | 2017-08-18 | 北京醇能科技有限公司 | A kind of low boiling fuel-staged combustion device and its system |
| CN107741013A (en) * | 2017-10-24 | 2018-02-27 | 北京首钢国际工程技术有限公司 | A kind of mixed steam stove of energy-saving burning |
| CN114322304A (en) * | 2021-12-31 | 2022-04-12 | 西安建筑科技大学 | Method and device for supplying heat and carrying gas to preset combustion chamber of oxygen-enriched combustion internal heating type coal low-temperature gas retort |
| CN115266281A (en) * | 2022-09-28 | 2022-11-01 | 张家港朗亿机电设备有限公司 | Burning dust generating device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106196054A (en) * | 2016-08-06 | 2016-12-07 | 陈维汉 | The cyclone classification of a kind of center water conservancy diversion regulation and the burner of temperature-controllable |
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| CN107062212A (en) * | 2017-05-22 | 2017-08-18 | 北京醇能科技有限公司 | A kind of low boiling fuel-staged combustion device and its system |
| CN107062212B (en) * | 2017-05-22 | 2023-11-07 | 北京醇能科技有限公司 | Low boiling point fuel staged combustion device and system thereof |
| CN107741013A (en) * | 2017-10-24 | 2018-02-27 | 北京首钢国际工程技术有限公司 | A kind of mixed steam stove of energy-saving burning |
| CN107741013B (en) * | 2017-10-24 | 2024-02-09 | 北京首钢国际工程技术有限公司 | Energy-saving combustion gas mixing furnace |
| CN114322304A (en) * | 2021-12-31 | 2022-04-12 | 西安建筑科技大学 | Method and device for supplying heat and carrying gas to preset combustion chamber of oxygen-enriched combustion internal heating type coal low-temperature gas retort |
| CN114322304B (en) * | 2021-12-31 | 2023-08-08 | 西安建筑科技大学 | Method and device for supplying heat and carrying gas to preset combustion chamber of oxygen-enriched combustion internal heating type coal low-temperature carbonization furnace |
| CN115266281A (en) * | 2022-09-28 | 2022-11-01 | 张家港朗亿机电设备有限公司 | Burning dust generating device |
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|---|---|
| CN104266188B (en) | 2016-07-06 |
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