CN103398379A - Oxygen-enriched burner - Google Patents
Oxygen-enriched burner Download PDFInfo
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- CN103398379A CN103398379A CN2013103130360A CN201310313036A CN103398379A CN 103398379 A CN103398379 A CN 103398379A CN 2013103130360 A CN2013103130360 A CN 2013103130360A CN 201310313036 A CN201310313036 A CN 201310313036A CN 103398379 A CN103398379 A CN 103398379A
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- oxygen
- burner
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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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Abstract
An oxygen-enriched burner comprises an air air-supply pipe (1) a gas inlet pipe (2), a burner housing (3) and an oxygen air-supply pipe (5), a gas nozzle (4) is connected onto the gas inlet pipe (2) and is penetratingly inserted in the burner housing (3), and an oxygen nozzle (6) is arranged at the tail end of the oxygen air-supply pipe (5) and arranged in the gas nozzle (4). The oxygen-enriched burner is simple in structure, low in cost, small in amount of fume in use, less in exhaust fume heat loss, high in fuel utilization rate, convenient to use, mount and maintain, and capable of lowering oxidation and burning loss rates of steel billets effectively and improving heating quality of the billets.
Description
Technical field
The present invention relates to the efficient burning equipment technical field that industrial furnace is used, relate in particular to a kind of oxygen-enriched burner.
Background technology
Domestic gas burner for industrial furnace adopts the sleeve type structure of air parcel combustion gas mostly at present, combustion gas is by the steel pipe ejection at center, combustion air is by the sleeve pipe in periphery, under the turning effort of cyclone, form with swirling eddy sprays into burner hearth, both, in the burning of burner hearth inner edge mixing limit, form cylindrical or flaring revolving body flame, belong to typical non-premixed combustion flame.Flame inside is take fuel as main reducing atmosphere, and outside is take combustion products such as air, carbon dioxide, steam as main oxidizing atmosphere.
There is following deficiency in this burner: while 1, using, exhaust gas volumn is larger, causes heat loss due to exhaust gas larger, and fuel availability is lower; 2, for the low calorie fuels such as blast furnace gas, too low because of theoretical temperature combustion during existing burner combustion, can't adopt the conventional combustion mode, must adopt heat accumulating type or the pre-heated combustion technology of heat exchanger, virtually increased the cost of investment of combustion system; 3, blank is surrounded by this oxidizing atmosphere all the time in heating process, causes the blank oxidization burning loss serious; 4, degree of sprawling is shorter in the horizontal direction for the revolving body flame that forms in use procedure, cause high-temperature region to concentrate on less zone, perpendicular projection area on blank is little, RADIATION ANGLE COEFFICIENT is lower being heated, both affected the heating effect of blank, also very easily form the localized hyperthermia district, and the existence in localized hyperthermia district, give the generation of the thermal NO condition of providing convenience, cause the amount of nitrogen oxides in combustion product higher, very easily cause environmental pollution.
In addition, the common employing of oxygen-enriched burner of the prior art is set up the oxygen rifle and is carried out the mode of pure oxygen winding-up below burner, thereby reaches the effect of oxygen-enriched combusting, but the growing amount of the burner nitrogen oxide of this kind structure and combustion adjuvant infeed amount are restive.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of simple in structure, with low cost, while using, exhaust gas volumn is little, heat loss due to exhaust gas is few, fuel availability is high, can eliminate the oxygen-enriched burner in flame localized hyperthermia district while burning.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of oxygen-enriched burner, comprise that air is for airduct, combustion gas inlet pipe and burner shell, be connected with exhaust gas nozzle on the combustion gas inlet pipe, exhaust gas nozzle interts in burner shell, this oxygen-enriched burner also comprises that oxygen is for airduct, supply the end of airduct to be provided with oxygen spray pipe at oxygen, oxygen spray pipe is located in exhaust gas nozzle.like this, in use, due to passing into of oxygen being arranged, improved the oxygen content in the combustion air, reduced the content of nitrogen, effectively raise theoretical temperature combustion, and make flame inside form fuel-rich regions, pyrolysis occurs and generates a large amount of macromolecule hydrocarbon compounds in fuel in this zone, reduced flame temperature when increasing flame brightness, can effectively eliminate the localized hyperthermia district in flame, regulate the infeed amount by control connection oxygen for valve opening on airduct, flame rigidity is good, shape is easy to control, in combustion product, nitrogen oxide emission reduces greatly, greatly reduce heat loss due to exhaust gas, improved fuel availability.
The coaxial setting of oxygen spray pipe and exhaust gas nozzle, facilitated manufacturing of the present invention, installation and maintenance like this, in use, is difficult for occurring Biased flow phenomenon.
Be provided with burner block at the burner shell end, be provided with the internal combustion chamber in burner block, the point diameter in internal combustion chamber is greater than its rear end diameter, and the end of oxygen spray pipe and exhaust gas nozzle is located at the front end in internal combustion chamber.
Be arranged with movable wind duct and fixing airduct on exhaust gas nozzle, one end of movable wind duct is narrow tube, be set on exhaust gas nozzle, the other end is large diameter pipe, be set in fixedly on airduct, at movable wind duct with fixedly be respectively equipped with the first air port and the second air port on the lap of airduct, be provided with active ring and retainer plate on movable wind duct, rotate active ring and can adjust the coincidence area in two air ports, at the end of fixedly airduct and exhaust gas nozzle, be provided with the first cyclone and the second cyclone in respectively.In the present invention, undergauge channel-type structure is adopted in the internal combustion chamber, and namely the front end cross dimensions in internal combustion chamber is greater than its rear end cross dimensions, fuel in the internal combustion chamber after primary combustion, to spray into burner hearth with higher speed, improve flame jet velocity and the length of flame.
Be provided with secondary air channel in burner block, secondary air channel is parallel to the internal combustion chamber and in the side away from heated object, combustion product after primary combustion occurs in fuel in the internal combustion chamber, the auxiliary air that enters burner hearth and secondary air channel infeed by internal combustion product passage burns, make like this flame front of blank to be weak reducing atmosphere, can effectively reduce the oxidization burning loss rate of steel billet, the blank heating quality is greatly improved.
Described secondary air channel and internal combustion product passage are strip.
Be provided with the circulating flue gas passage in burner block, the circulating flue gas passage is communicated with the internal combustion chamber, and secondary air channel is distributed in the both sides in internal combustion chamber, and the circulating flue gas passage is strip.By adopting flue gas recirculation backflow cooling technology to reduce the temperature of flame; effectively avoided flame root local temperature too high, make inner combustion chamber's flue gas be reducing atmosphere; the protection burner block life-span, greatly reduce the discharge capacity of the pollutants such as nitrogen oxide.In the present invention, strip all is arranged in secondary air channel, circulating flue gas passage and internal combustion chamber, can make like this burner flame flow in use is flat, the parallel burner hearth that sprays into, cover blank surface, RADIATION ANGLE COEFFICIENT is large, can effectively improve the radiant heat transfer effect of blank, has improved the thermal efficiency.
Compared with prior art, the technology of the present invention has the following advantages:
1, the present invention is simple in structure, with low cost, while using, exhaust gas volumn is little, heat loss due to exhaust gas is few, fuel availability is high.the common employing of oxygen-enriched burner of the prior art is set up the oxygen rifle and is carried out the mode of pure oxygen winding-up below burner, thereby reaches the effect of oxygen-enriched combusting, but the growing amount of the burner nitrogen oxide of this kind structure and combustion adjuvant infeed amount are restive, and in the present invention, by setting up oxygen for airduct and oxygen spray pipe in existing burner, and oxygen spray pipe is located in exhaust gas nozzle, and is simple in structure, with low cost, in use, due to passing into of oxygen being arranged, improved the oxygen content in the combustion air, reduced the content of nitrogen, effectively raise theoretical temperature combustion, and make flame inside form fuel-rich regions, pyrolysis occurs and generates a large amount of macromolecule hydrocarbon compounds in fuel in this zone, reduced flame temperature when increasing flame brightness, can effectively eliminate the localized hyperthermia district in flame, regulate the infeed amount by control connection oxygen for valve opening on airduct, flame rigidity is good, shape is easy to control, in combustion product, nitrogen oxide emission reduces greatly, greatly reduce heat loss due to exhaust gas, improved fuel availability.
2, manufacturing of the present invention, installation, use are all convenient.In the present invention, with oxygen spray pipe and the coaxial setting of exhaust gas nozzle, manufacturing of the present invention, installation and maintenance have been facilitated like this, in use, be difficult for occurring Biased flow phenomenon, when improving flame rigidity, avoided oxygen spray pipe, exhaust gas nozzle, internal combustion chamber because with flame, directly contacting defects such as causing its shortening in service life.
3, the present invention can improve flame jet velocity and the length of flame.In the present invention, undergauge channel-type structure is adopted in the internal combustion chamber, and namely the front end cross dimensions in internal combustion chamber is greater than its rear end cross dimensions, fuel in the internal combustion chamber after primary combustion, to spray into burner hearth with higher speed, improve flame jet velocity and the length of flame.
4, the present invention can effectively reduce oxidization burning loss, the raising blank heating quality of steel billet.In the present invention, be provided with secondary air channel in burner block, and this passage is positioned at the side away from blank in internal combustion chamber, making like this secondary air channel is blank away from heated object all the time, make the flame front of blank to be weak reducing atmosphere, can effectively reduce the oxidization burning loss rate of steel billet, the blank heating quality is greatly improved.
5, the service life of energy prolonging combustion device brick of the present invention and reduction nitrogen oxide emission.In the present invention; be provided with the circulating flue gas passage in burner block; the circulating flue gas passage is communicated with internal combustion chamber and burner hearth; by adopting flue gas recirculation backflow cooling technology to reduce the temperature of flame; effectively avoided flame root local temperature too high, make inner combustion chamber's flue gas be reducing atmosphere; the protection burner block life-span, greatly reduce the discharge capacity of the pollutants such as nitrogen oxide.
6, the present invention can improve the thermal efficiency.In the present invention, secondary air channel, circulating flue gas passage and internal combustion chamber all are strip, can make like this burner flame flow in use is flat, the parallel burner hearth that sprays into, cover blank surface, RADIATION ANGLE COEFFICIENT is large, can effectively improve the radiant heat transfer effect of blank, has improved the thermal efficiency.
7, the present invention is easy to operate.In the present invention, by be arranged with movable wind duct and fixing airduct on exhaust gas nozzle, at movable wind duct with fixedly be respectively equipped with the first air port and the second air port on the lap of airduct, be provided with active ring and retainer plate on movable wind duct, adjust the coincidence area in two air ports by rotating active ring, thereby reach the first and second combustion air ratio of adjustment,, to reach better combustion efficiency, operate very convenient.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the structural representation of oxygen-enriched burner of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
have in above figure: 1 air is for airduct, 2 combustion gas inlet pipes, 3 burner shells, 4 exhaust gas nozzles, 5 oxygen are for airduct, 6 oxygen spray pipes, 7 burner block, 8 internal combustion chambeies, 9 secondary air channels, 10 circulating flue gas passages, 11 movable wind ducts, 12 fixing airducts, 13 first air ports, 14 second air ports, 15 active rings, 16 retainer plates, 17 first cyclones, 18 second cyclones, 19 special-shaped flanges, 20 burner shell steel plates, 21 dog screws, 22 spouts, 23 internal combustion product passages.
The specific embodiment
Embodiment 1
(with reference to Fig. 1) a kind of oxygen-enriched burner, comprise that air is for airduct 1, combustion gas inlet pipe 2 and burner shell 3, be connected with exhaust gas nozzle 4 on combustion gas inlet pipe 2, exhaust gas nozzle 4 interts in burner shell 3, this oxygen-enriched burner also comprises that oxygen is for airduct 5, supply the end of airduct 5 to be provided with oxygen spray pipe 6 at oxygen, oxygen spray pipe 6 is located in exhaust gas nozzle 4, oxygen spray pipe 6 and the coaxial setting of exhaust gas nozzle 4, air is connected with the stokehold air supply line by flange for airduct 2 with oxygen for airduct 1, and combustion gas inlet pipe 3 is connected with the stokehold steam line by flange.
be provided with burner block 7 at burner shell 3 ends, be provided with internal combustion chamber 8 in burner block 7, the point diameter in internal combustion chamber 8 is greater than its rear end diameter, the end of oxygen spray pipe 6 and exhaust gas nozzle 4 is located at the front end in internal combustion chamber 8, be arranged with movable wind duct 11 and fixing airduct 12 on described exhaust gas nozzle 4, one end of movable wind duct 11 is narrow tube, be set on exhaust gas nozzle 4, the other end is large diameter pipe, be set in fixedly on airduct 12, fixedly an end of airduct 12 is fixed on burner shell steel plate 20 by special-shaped flange 19, at movable wind duct 11 with fixedly be respectively equipped with the first air port 13 and the second air port 14 on the lap of airduct 12, be provided with active ring 15 and retainer plate 16 on movable wind duct 11, be provided with dog screw 21 in retainer plate 16, be used for geocoded activity airduct 11, in actual mechanical process, rotate active ring 15 and can adjust the coincidence area in two air ports, be provided with the first cyclone 17 and the second cyclone 18 at the end of fixedly airduct 12 and exhaust gas nozzle 4 in respectively.Be provided with secondary air channel 9 in burner block 7, what secondary air channel 9 was positioned at internal combustion chamber 8 is a side of blank away from heated object, and (with reference to Fig. 2) described secondary air channel 9 is strip; Be provided with the circulating flue gas path 10 in burner block 7, the circulating flue gas path 10 is communicated with internal combustion chamber 8, and secondary air channel 9 is distributed in the both sides in internal combustion chamber 8, and circulating flue gas path 10 and internal combustion chamber 8 all are strip.
In the present embodiment, oxygen-enriched burner is mounted in heated object top conduct " upper burner " use, its course of work is as follows: secondary air channel 9 is positioned at away from blank side, combustion gas enters burner by combustion gas inlet pipe 2, and combustion air supplies airduct 1 and oxygen to enter burner for airduct 5 by air.Air is for the combustion air of airduct 1, a part is by the first air port 13 on fixing airduct 12 and movable wind duct 11 and the intersection between the second air port 14, enter the fixedly inner chamber of airduct 12 and movable wind duct 11, this part air and form the primary air of burner from the oxygen of oxygen spray pipe 6, after turning effort by the first cyclone 17 and the second cyclone 18, spray into together internal combustion chamber 8 with the form of rotating flow and the combustion gas of spout 22 ejections, 8 imperfect combustion occurs in the internal combustion chamber.Air directly sprays into burner hearth for the secondary combustion-supporting air of airduct 1 through strip secondary air channel 9, the imperfect combustion product of this part secondary combustion-supporting air and internal combustion product passage 23 ejections and circulating flue gas path 10 entrainment the flue gas of coming in to be mixed again, and completes whole combustion process in burner hearth.Wherein the ratio of first and second combustion air is by adjusting movable wind duct 11 and fixedly the first air port 13 on airduct 12, the coincidence area between the second air port 14 are regulated, be connected to by adjusting the supply ratio that the valve opening on oxygen spray pipe 6 is regulated oxygen, control the concentration of oxygen in combustion air.
Embodiment 2
In the present embodiment, oxygen-enriched burner is mounted in heated object and issues and use as " lower burner ", version is identical with embodiment 1 with the course of work, gets final product with the oxygen-enriched burner Rotate 180 shown in Fig. 1 ° or with secondary air channel 9 and circulating flue gas path 10 reversing of position during installation.
Claims (8)
1. oxygen-enriched burner, comprise that air is for airduct (1), combustion gas inlet pipe (2) and burner shell (3), be connected with exhaust gas nozzle (4) on combustion gas inlet pipe (2), exhaust gas nozzle (4) interts in burner shell (3), it is characterized in that: this oxygen-enriched burner also comprises that oxygen is for airduct (5), supply the end of airduct (5) to be provided with oxygen spray pipe (6) at oxygen, oxygen spray pipe (6) is located in exhaust gas nozzle (4).
2. oxygen-enriched burner according to claim 1, is characterized in that: oxygen spray pipe (6) and the coaxial setting of exhaust gas nozzle (4).
3. oxygen-enriched burner according to claim 1, it is characterized in that: at burner shell (3) end, be provided with burner block (7), be provided with internal combustion chamber (8) in burner block (7), the point diameter in internal combustion chamber (8) is greater than its rear end diameter, and the end of oxygen spray pipe (6) and exhaust gas nozzle (4) is located at the front end of internal combustion chamber (8).
4. according to claim 1 and 2 or 3 described oxygen-enriched burners, it is characterized in that: be arranged with movable wind duct (11) and fixing airduct (12) on described exhaust gas nozzle (4), one end of movable wind duct (11) is narrow tube, be set on exhaust gas nozzle (4), the other end is large diameter pipe, be set in fixedly on airduct (12), at movable wind duct (11) with fixedly be respectively equipped with the first air port (13) and the second air port (14) on the lap of airduct (12), be provided with active ring (15) and retainer plate (16) on movable wind duct (11), rotate active ring (15) and can adjust the coincidence area in two air ports, be provided with the first cyclone (17) and the second cyclone (18) at the end of fixedly airduct (12) and exhaust gas nozzle (4) in respectively.
5. oxygen-enriched burner according to claim 4, it is characterized in that: be provided with secondary air channel (9) in burner block (7), secondary air channel (9) is parallel to internal combustion chamber (8) and in the side away from heated object, combustion product after primary combustion occurs in fuel in internal combustion chamber (8), the auxiliary air that enters burner hearth and secondary air channel (9) infeed by internal combustion product passage (23) burns.
6. oxygen-enriched burner according to claim 5, it is characterized in that: described secondary air channel (9) and internal combustion product passage (23) are strip.
7. according to claim 5 or 6 described oxygen-enriched burners, it is characterized in that: be provided with circulating flue gas passage (10) in burner block (7), circulating flue gas passage (10) is communicated with internal combustion chamber (8), and secondary air channel (9) is distributed in the both sides of internal combustion chamber (8).
8. oxygen-enriched burner according to claim 7, it is characterized in that: circulating flue gas passage (10) is strip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103130360A CN103398379A (en) | 2013-07-24 | 2013-07-24 | Oxygen-enriched burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103130360A CN103398379A (en) | 2013-07-24 | 2013-07-24 | Oxygen-enriched burner |
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| CN103398379A true CN103398379A (en) | 2013-11-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048502A (en) * | 2014-06-10 | 2014-09-17 | 河南嘉和节能科技有限公司 | Combustion-supporting method of rotary cement kiln burner oxygen enrichment device |
| CN105972595A (en) * | 2016-06-24 | 2016-09-28 | 洛阳明远石化技术有限公司 | Combustor |
| CN106918053A (en) * | 2015-12-24 | 2017-07-04 | 中国石油天然气股份有限公司 | Ignition device and oil field exploitation method |
| CN107270290A (en) * | 2017-08-10 | 2017-10-20 | 西安拓沃能动科技有限公司 | A kind of nozzle structure and super oxygen-poor burner |
| CN107355786A (en) * | 2017-09-04 | 2017-11-17 | 唐山纳川富氧节能技术开发有限公司 | The more level air-distributions of industrial combustion gas kiln are oxygen-enriched with burning burner special |
| CN107435925A (en) * | 2017-09-20 | 2017-12-05 | 安徽皓沣环保科技有限公司 | A kind of multistage combustion energy-conserving and environment-protective burner |
| CN110566956A (en) * | 2019-10-14 | 2019-12-13 | 康柏森热能科技(苏州)有限公司 | Combustion device with air inlet mode switching function |
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| CN202092129U (en) * | 2011-05-20 | 2011-12-28 | 中冶华天工程技术有限公司 | Gas burner |
| CN203628653U (en) * | 2013-07-24 | 2014-06-04 | 中冶华天工程技术有限公司 | Oxygen-enriched burner |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048502A (en) * | 2014-06-10 | 2014-09-17 | 河南嘉和节能科技有限公司 | Combustion-supporting method of rotary cement kiln burner oxygen enrichment device |
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| CN107270290A (en) * | 2017-08-10 | 2017-10-20 | 西安拓沃能动科技有限公司 | A kind of nozzle structure and super oxygen-poor burner |
| CN107355786A (en) * | 2017-09-04 | 2017-11-17 | 唐山纳川富氧节能技术开发有限公司 | The more level air-distributions of industrial combustion gas kiln are oxygen-enriched with burning burner special |
| CN107435925A (en) * | 2017-09-20 | 2017-12-05 | 安徽皓沣环保科技有限公司 | A kind of multistage combustion energy-conserving and environment-protective burner |
| CN110566956A (en) * | 2019-10-14 | 2019-12-13 | 康柏森热能科技(苏州)有限公司 | Combustion device with air inlet mode switching function |
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Application publication date: 20131120 |