CN109539252A - A kind of high velocity burner - Google Patents

A kind of high velocity burner Download PDF

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Publication number
CN109539252A
CN109539252A CN201811617720.7A CN201811617720A CN109539252A CN 109539252 A CN109539252 A CN 109539252A CN 201811617720 A CN201811617720 A CN 201811617720A CN 109539252 A CN109539252 A CN 109539252A
Authority
CN
China
Prior art keywords
combustion chamber
spout
combustion
high velocity
flue gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811617720.7A
Other languages
Chinese (zh)
Inventor
侯煜
董杰
蒋乃富
周劲松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CERIS (YANGZHOU) METALLURGICAL TECHNOLOGY INDUSTRY Co Ltd
Original Assignee
CERIS (YANGZHOU) METALLURGICAL TECHNOLOGY INDUSTRY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CERIS (YANGZHOU) METALLURGICAL TECHNOLOGY INDUSTRY Co Ltd filed Critical CERIS (YANGZHOU) METALLURGICAL TECHNOLOGY INDUSTRY Co Ltd
Priority to CN201811617720.7A priority Critical patent/CN109539252A/en
Publication of CN109539252A publication Critical patent/CN109539252A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/48Nozzles
    • F23D14/58Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/66Preheating the combustion air or gas
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Abstract

The present invention discloses a kind of high velocity burner, the second combustion chamber of the first combustion chamber and rear end including front end, and the chamber interior volume of the second combustion chamber is greater than the first combustion chamber;The front end of first combustion chamber is communicated with the blast tube with fuel gas inlet, and the outside of blast tube is then provided with the air duct with air intake;The inner end of the blast tube is equipped with gas spray head.The present apparatus is simple and compact for structure, occupies little space, and is easily installed and safeguards, combustion chamber volume is smaller compared to the heating furnace burner hearth of ordinary burner, and volumetric heat intensity is greatly up to 6 × 108kJ/m3·h;And the wide reachable 1:50 of adjustable range, and ordinary burner only has 1:10, is easy to auto-control;In addition, high-temperature preheated air can be used in the present apparatus, therefore combustion temperatures can be obtained with fuel gas with low heat value, combustion chambers burn temperature is higher, close to 2000 DEG C, therefore can be suitable for most of industrial furnaces.

Description

A kind of high velocity burner
Technical field
The present invention relates to industrial burner technical field, specifically a kind of high velocity burner.
Background technique
High velocity burner is mainly used in industrial furnace.General industry furnace is for heated material and guarantees fuel completely burned All there is a spacious burner hearth.In this way, burner hearth, which is heated to operation temperature, when blow-on needs long time, and when blowing out, Since thermal inertia still has greatly the quite a while to continue to heat workpiece, it is difficult to control heating temperature, workpiece is easily caused to overheat.For Prevent workpiece from overheating, common heating furnace have to run under the maximum heating temperature that slightly above workpiece is allowed, this reduces Heating speed increases heating time, especially even more so in the close heating final temperature of workpiece.
In addition, various adverse effects can be generated by extending heating time at high temperature, the oxidation and decarburization of steel are such as caused, work is made The shortcomings that part surface is crude and hardness reduces, therefore in order to energy saving, eliminates common heating furnace, and with modern production flowing water Line is mating, and rapid heating technology occurs in the 1960s.Quickly heating relies primarily on convective heat transfer rather than radiant heat transfer, Its main feature is that furnace body is small, heating speed is fast, thermal inertia is small, heating workpiece quality is high, the thermal efficiency is high and is easy to automatically control.
The key quickly heated is realized first is that transformation furnace body;Second is that using high velocity burner.High quick burning in the prior art There are two effects for burner, first is that combustion gas is made to burn under very high calorific intensity;Second is that making high-temperature flue gas with very high flow velocity Combustion chamber is sprayed, to increase the effect of convective heat transfer in furnace.
And domestic high velocity burner flue gas emission speed in the prior art is high subsonic speed (200~300m/s), and energy Surmount the application that rarely has that this speed reaches ultrasonic high velocity burner, and the present invention provides a kind of high-temperature flue gas to spray speed Degree can reach the solution of supersonic speed (340m/s or more), higher heat exchange efficiency be provided than existing product, when shortening heating Between, while flameless combustion is realized in the combustion chamber.
Summary of the invention
Goal of the invention: in view of the deficiency of the prior art, a kind of high velocity burner is provided.
Technical solution: in order to achieve the above-mentioned object of the invention, The technical solution adopted by the invention is as follows: a kind of high-velocity combustion The chamber interior volume of device, the second combustion chamber of the first combustion chamber and rear end including front end, the second combustion chamber is greater than the first combustion chamber; The front end of first combustion chamber is communicated with the blast tube with fuel gas inlet, and the outside of blast tube is then provided with and has The air duct of air intake;The inner end of the blast tube is equipped with gas spray head, which is internally provided with Combustion gas spout, and the outside of gas spray head is then provided with the plug ring being connected with the first combustion chamber chamber interior walls;And this is described Equally distributed primary air spout is then provided on plug ring;The primary air spout connects air duct and the first combustion chamber It is logical;And auxiliary air spout be connected with air duct and equally distributed is additionally provided in second combustion chamber;Institute The rear end for stating the second combustion chamber is additionally provided with flue gas spout, which is the conical opening and connection by forward and backward side The spout throat of front and back side conical opening is constituted;Wherein the conical opening of front side is contracted to spout throat from large to small, and spout throat Rear side conical opening later changes from small to big again to be expanded outwardly, to constitute entire flue gas spout.
Preferably, the combustion gas spout is set as being made of former and later two conical openings, and the length of rear side conical opening Greater than front side conical opening;And the taper of front side conical opening is greater than the taper of rear side conical opening in the flue gas spout.
Preferably, first combustion chamber, the second combustion chamber and flue gas spout are piled up by heat resisting brick and are constituted, and The heat resisting brick combines fixed installation using inserted seam allowance by front end heat resisting brick and rear end heat resisting brick and constitutes, and rear end is heat-resisting Brick, which is piled up, constitutes flue gas spout.
Preferably, the auxiliary air notch setting is in the heat resisting brick of front end, and the auxiliary air Spout and primary air spout are evenly spaced to be provided with 6-12.
Preferably, being provided with ceramics on the inner wall of first combustion chamber, the second combustion chamber and flue gas spout Protective case.
Preferably, being additionally provided with the ignition tip being communicated with the outside in the first combustion chamber;And second combustion chamber Inside then it is provided with the flame monitor externally protruded.
Preferably, the gas spray head is set as heat resisting steel or ceramic making forms.
The utility model has the advantages that compared with prior art, the present invention having the advantage that
(1) present apparatus is simple and compact for structure, occupies little space, and is easily installed and safeguards, combustion chamber volume is compared to common combustion The heating furnace burner hearth of burner is smaller, and volumetric heat intensity is greatly up to 6 × 108kJ/m3·h;And the wide reachable 1:50 of adjustable range, and it is general Logical burner only has 1:10, is easy to auto-control;In addition, high-temperature preheated air can be used in the present apparatus, therefore can be with low heat value Combustion gas obtains combustion temperatures, and combustion chambers burn temperature is higher, close to 2000 DEG C, therefore can be suitable for most of industrial furnaces In;
(2), strengthen heat convection, shorten heating time, ordinary burner flame speed is very low, using radiation heat transfer as master contract 80%~90% is accounted for, heat convection ratio very little.The high velocity burner of the present apparatus is to heating object surface based on turbulent flow;? Heating furnace size, combustion product temperature are heated in the identical situation of workpiece temperature, and the high velocity burner convection current of the present apparatus is changed The thermal efficiency is 3~4 times of ordinary burner, can significantly shorten heating time, simultaneously because heat convection increases, the row of reducing Smoke temperature degree, i.e. heat exchange efficiency improve, and reduce the thermal losses that flue gas is taken away;
(3) combustion chamber temperature uniformity can be improved in the burner of the present apparatus, shortens equal temperature time, the high speed of the present apparatus Burner avoids the burning local high temperature zone of ordinary burner flame, and the red-hot air-flow of high speed sprayed can play relatively by force Volume is inhaled and stirring action, keeps burning indoor temperature distribution more uniform, so as to shorten workpiece soaking time, improves productivity, together When energy saving;
(4) present apparatus can reduce the concentration of emission of NOx, and compared with ordinary burner, interior flame more disperse of burning does not have There is apparent burning local high temperature zone, forms flameless combustion, reduce the concentration of oxygen, nitrogen;Further, since taking big speed gas Stream, burning velocity is fast, and flue gas residence time in pipeline is short, also further reduced the concentration of emission of NOx;In addition, burner The speed of flame jet is bigger, and the indoor volume that burns is inhaled and reflux effect is stronger, is more advantageously implemented the atmosphere of hypoxemia, this Kind relatively low combustion gas and oxygen concentration reduce the average combustion speed in entire combustion zone, have expanded combustion boundary, Uniform temperature field is formd, and then also reduces the discharge of NOx;And burning Indoor Combustion reaction speed is fast, can be realized Full burning, meets the necessary condition of low NOx drainage.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention;
Fig. 2 is left side view in Fig. 1;
Fig. 3 is right part cross-sectional view in Fig. 1.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, and the present embodiment is with technical solution of the present invention Premised under implemented, it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in Figure 1, Figure 2 and Figure 3, a kind of high velocity burner, the second combustion of the first combustion chamber 1 and rear end including front end Room 2 is burnt, the chamber interior volume of the second combustion chamber 2 is greater than the first combustion chamber 1;The front end of first combustion chamber 1 is communicated with combustion The blast tube 4 of gas entrance 3, and the outside of blast tube 4 is then provided with the air duct 6 with air intake 5;The combustion The inner end in gas channel 4 is equipped with gas spray head 7, which is internally provided with combustion gas spout 16, and gas spray head 7 Outside is then provided with the plug ring 8 being connected with 1 chamber interior walls of the first combustion chamber;And it is then provided on the plug ring 8 uniformly The primary air spout 9 of distribution;Air duct 6 is connected to by the primary air spout 9 with the first combustion chamber 1;And described second Auxiliary air spout 10 be connected with air duct 6 and equally distributed is additionally provided in combustion chamber 2;Second combustion chamber 2 rear end is additionally provided with flue gas spout 11, which is set as conical opening and connection front and back side cone by forward and backward side The spout throat of shape mouth is constituted;Wherein front side conical opening be contracted to spout throat from large to small, and after spout throat after Side conical opening changes from small to big again to be expanded outwardly, to constitute entire flue gas spout.
The combustion gas spout 16 is set as being made of former and later two conical openings, and the length of rear side conical opening is greater than front side Conical opening;And the taper of front side conical opening is greater than the taper of rear side conical opening in the flue gas spout 11;First combustion It burns room 1, the second combustion chamber 2 and flue gas spout 11 to be piled up and constituted by heat resisting brick 12, and the heat resisting brick 12 is resistance to by front end Hot brick and rear end heat resisting brick are fixedly mounted using the combination of inserted seam allowance to be constituted, and rear end heat resisting brick, which is piled up, constitutes flue gas spout 11。
The auxiliary air spout 10 is arranged in the heat resisting brick 12 of front end, and the auxiliary air spout 10 And the evenly spaced 6-12 of being provided with of primary air spout 9;First combustion chamber 1, the second combustion chamber 2 and the cigarette Ceramic protective sleeve 13 is provided on the inner wall of gas blowout mouth 11;The point being communicated with the outside is additionally provided in the combustion chamber 1 Nozzles 14 and flame monitor 15;The gas spray head 7 is set as heat resisting steel or ceramic making forms.
The present apparatus in use, air is passed through from air duct is divided into two parts into combustion chamber, spray from primary air by a part To the first combustion chamber, another part is then sprayed from auxiliary air spout to the second combustion chamber for mouth injection;And combustion gas is then led to by combustion gas Road passes through the combustion gas spout high speed ejection by gas spray head after being passed through, which is made of two conical openings.High speed can be formed Formula is sprayed on a large scale, and the multiply high-speed air flow that combustion gas first comes out with primary air spout mixes, and is introduced into the first combustion chamber It is interior, it is ignited mouth and ignites;The mixed airflow of primary combustion enters back into the second combustion chamber, and the multiply sprayed with auxiliary air spout is high Fast air stream mixing.Combustion gas can form multiply flame jet with the primary and auxiliary air of convergence, in the combustion chamber substantially It realizes completely burned (90% or more).
Due to the suction of the strong volume of multiply combustion gas and the high-speed jet of air and stirring action, combustion gas and air can be uniform Mixing makes two indoor flame more disperses of burning form flameless combustion without local high temperature zone of significantly burning.
And the variable cross-section flue gas spray that the red-hot air-flow that the first combustion chamber and the second combustion chamber generate is constituted from two conical pipes Mouth high speed ejection, the first half of spout are from large to small to middle shrinkage to spout throat, and throat changes from small to big outward again later It expands, the gas in combustion chamber is flowed into the first half of spout by high pressure, by latter half of evolution after throat.This structure can make The speed of air-flow changes because spraying the variation of sectional area, makes air-flow from subsonic speed to velocity of sound, until accelerating to supersonic speed.
Two indoor red-hot flue gases of high temperature of burning have extremely strong erosion corrosion effect, the service life of flue gas spout side Lower than air and combustion gas spout side.And in the present apparatus flue gas spout of two combustion chambers and rear side by heat-resisting swivel hook live and At, and heat resisting brick is made of two parts, and combustion chamber also mutually should be split type structure, front end heat resisting brick constitute the first combustion chamber and Simultaneously auxiliary air spout is arranged in second combustion chamber, and ceramic protective sleeve is arranged, and rear end heat resisting brick hooks flue gas spout, and in inside It is same that ceramic protective sleeve is set, it is fixed between the heat resisting brick of front and back side using the combination of inserted seam allowance, the heat resisting brick of rear side is easy Damage side, replacement convenient for safeguarding;And the ceramic protective sleeve can be effective against the erosion corrosion of the red-hot flue gas of high temperature, while easily It is replaced in maintenance.
The present apparatus is suitable for diversified forms industrial furnace, can be integrated in burner inlet to further increase energy utilization rate Preheater preheats room temperature combustion gas and air, reduces energy loss.For example, using natural gas, calorific value about 35000kJ/ Nm3, 250 DEG C of preheating temperature, 450 DEG C of air preheat;When not preheating, using natural gas, calorific value about 35000kJ/Nm3, air room temperature 25℃。
Specific embodiment is a preferred embodiment of the present invention, is not for limiting implementation and power of the invention Sharp claimed range, the equivalence changes and modification that content described in all ranges of patent protection according to the present invention is made should all It is included in the scope of the patent application of the present invention.

Claims (7)

1. a kind of high velocity burner, it is characterised in that: the second combustion chamber (2) of the first combustion chamber (1) and rear end including front end, The chamber interior volume of second combustion chamber (2) is greater than the first combustion chamber (1);The front end of first combustion chamber (1) is communicated with combustion The blast tube (4) of gas entrance (3), and the outside of blast tube (4) is then provided with the air duct with air intake (5) (6);The inner end of the blast tube (4) is equipped with gas spray head (7), which is internally provided with gas injection Mouth (16), and the outside of gas spray head (7) is then provided with the plug ring (8) being connected with the first combustion chamber (1) chamber interior walls;And it is somebody's turn to do Equally distributed primary air spout (9) is then provided on the plug ring (8);The primary air spout (9) is by air duct (6) it is connected to the first combustion chamber (1);And be additionally provided in second combustion chamber (2) it is being connected with air duct (6) and Equally distributed auxiliary air spout (10);The rear end of second combustion chamber (2) is additionally provided with flue gas spout (11), the flue gas Spout (11) is set as being made of the spout throat of the conical opening of forward and backward side and connection front and back side conical opening;On front side of wherein Conical opening is contracted to spout throat from large to small, and the rear side conical opening after spout throat changes from small to big and expands outwardly, from And constitute entire flue gas spout.
2. a kind of high velocity burner according to claim 1, it is characterised in that: the combustion gas spout (16) be set as by Former and later two conical openings are constituted, and the length of rear side conical opening is greater than front side conical opening;And in the flue gas spout (11) before The taper of side conical opening is greater than the taper of rear side conical opening.
3. a kind of high velocity burner according to claim 1, it is characterised in that: first combustion chamber (1), the second combustion It burns room (2) and flue gas spout (11) is piled up by heat resisting brick (12) and constituted, and the heat resisting brick (12) is by front end heat resisting brick And rear end heat resisting brick is fixedly mounted using the combination of inserted seam allowance and is constituted, rear end heat resisting brick, which is piled up, constitutes flue gas spout (11).
4. a kind of high velocity burner according to claim 3, it is characterised in that: auxiliary air spout (10) setting In the heat resisting brick (12) of front end, and the auxiliary air spout (10) and primary air spout (9) are spaced Even is provided with 6-12.
5. a kind of high velocity burner according to claim 3, it is characterised in that: first combustion chamber (1), the second combustion It burns and is provided with ceramic protective sleeve (13) on the inner wall of room (2) and flue gas spout (11).
6. a kind of high velocity burner according to claim 1, it is characterised in that: also set in first combustion chamber (1) It is equipped with the ignition tip (14) being communicated with the outside;And the flame externally protruded is then provided in second combustion chamber (2) Monitor (15).
7. a kind of high velocity burner according to claim 1, it is characterised in that: the gas spray head (7) is set as resistance to Hot steel or ceramic making form.
CN201811617720.7A 2018-12-28 2018-12-28 A kind of high velocity burner Pending CN109539252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811617720.7A CN109539252A (en) 2018-12-28 2018-12-28 A kind of high velocity burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811617720.7A CN109539252A (en) 2018-12-28 2018-12-28 A kind of high velocity burner

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Publication Number Publication Date
CN109539252A true CN109539252A (en) 2019-03-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114484434A (en) * 2020-11-11 2022-05-13 芜湖美的厨卫电器制造有限公司 Combustor and water heater

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101706103A (en) * 2009-12-11 2010-05-12 北京工业大学 Efficient and energy-saving environment-friendly high-pressure burner
CN201652354U (en) * 2010-04-20 2010-11-24 无锡南理工科技发展有限公司 High-speed energy-saving ceramic kiln burning nozzle
CN104266190A (en) * 2014-10-09 2015-01-07 中冶南方(武汉)威仕工业炉有限公司 Oxygen-enriched flameless gas burner and control method thereof
CN105318330A (en) * 2014-07-16 2016-02-10 鞍钢股份有限公司 Burner and method capable of improving combustion effect of regenerative furnace
CN106090906A (en) * 2016-08-26 2016-11-09 佛山市科皓燃烧设备制造有限公司 The blower fan ultralow NOx fuel dilution technology heat-accumulating burner of backflow

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101706103A (en) * 2009-12-11 2010-05-12 北京工业大学 Efficient and energy-saving environment-friendly high-pressure burner
CN201652354U (en) * 2010-04-20 2010-11-24 无锡南理工科技发展有限公司 High-speed energy-saving ceramic kiln burning nozzle
CN105318330A (en) * 2014-07-16 2016-02-10 鞍钢股份有限公司 Burner and method capable of improving combustion effect of regenerative furnace
CN104266190A (en) * 2014-10-09 2015-01-07 中冶南方(武汉)威仕工业炉有限公司 Oxygen-enriched flameless gas burner and control method thereof
CN106090906A (en) * 2016-08-26 2016-11-09 佛山市科皓燃烧设备制造有限公司 The blower fan ultralow NOx fuel dilution technology heat-accumulating burner of backflow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114484434A (en) * 2020-11-11 2022-05-13 芜湖美的厨卫电器制造有限公司 Combustor and water heater

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Application publication date: 20190329