CN209484594U - A kind of high heating value high velocity burner - Google Patents
A kind of high heating value high velocity burner Download PDFInfo
- Publication number
- CN209484594U CN209484594U CN201822224631.8U CN201822224631U CN209484594U CN 209484594 U CN209484594 U CN 209484594U CN 201822224631 U CN201822224631 U CN 201822224631U CN 209484594 U CN209484594 U CN 209484594U
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- combustion chamber
- spout
- combustion
- air
- flue gas
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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 utility model discloses a kind of high heating value 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
Technical field
The utility model relates to industrial burner technical field, specifically a kind of high heating value 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 utility model provides a kind of high-temperature flue gas spray
Speed can reach the solution of supersonic speed (340m/s or more) out, provide higher heat exchange efficiency than existing product, shorten and add
The hot time, while flameless combustion is realized in the combustion chamber.
Utility model content
Purpose of utility model: in view of the deficiency of the prior art, a kind of high heating value high velocity burner is provided.
Technical solution: in order to realize that above-mentioned purpose of utility model, the technical solution adopted in the utility model are as follows: Yi Zhonggao
Calorific value high velocity burner, the second combustion chamber of the first combustion chamber and rear end including front end, the chamber interior volume of the second combustion chamber are big
In the first combustion chamber；The front end of first combustion chamber is communicated with the blast tube with fuel gas inlet, and blast tube is outer
Side is then provided with the air duct with air intake；The inner end of the blast tube is equipped with gas spray head, the gas injection
Head is internally provided with combustion gas spout, and the outside of gas spray head is then provided with the plug being connected with the first combustion chamber chamber interior walls
Ring；And equally distributed primary air spout is then provided on the plug ring；The primary air spout by air duct with
First combustion chamber；And it is additionally provided in second combustion chamber being connected with air duct and equally distributed secondary
Air port；The rear end of second combustion chamber is additionally provided with flue gas spout, which is the taper by forward and backward side
The spout throat of mouth and connection 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 the rear side conical opening after spout throat changes from small to big and expands 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 the utility model compared with prior art, has 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 a schematic structural view of the utility model；
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 utility model is furtherd elucidate, the present embodiment is with the utility model
Implemented under premised on technical solution, it should be understood that these embodiments are merely to illustrate the utility model rather than limit this reality
With novel range.
As shown in Figure 1, Figure 2 and Figure 3, a kind of high heating value high velocity burner, the first combustion chamber 1 and rear end including front end
The chamber interior volume of second combustion chamber 2, the second combustion chamber 2 is greater than the first combustion chamber 1；The front end of first combustion chamber 1 is communicated with
Blast tube 4 with fuel gas inlet 3, and the outside of blast tube 4 is then provided with the air duct 6 with air intake 5；Institute
The inner end for the blast tube 4 stated is equipped with gas spray head 7, which is internally provided with combustion gas spout 16, and gas injection
First 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
Equally distributed primary air spout 9；Air duct 6 is connected to by the primary air spout 9 with the first combustion chamber 1；And it is described
Auxiliary air spout 10 be connected with air duct 6 and equally distributed is additionally provided in second combustion chamber 2；Second combustion
The rear end for burning room 2 is additionally provided with flue gas spout 11, which is set as conical opening and connection front and back by forward and backward side
The spout throat of side conical opening is constituted；Wherein the conical opening of front side is contracted to spout throat from large to small, and after spout throat
Rear side conical opening change from small to big again and expand 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 utility model, is not for limiting the utility model
Implement and scope of the claims, all equivalence changes made according to content described in present utility model application scope of patent protection
And modification, it should be included in the utility model patent application range.
Claims (7)
1. a kind of high heating value high velocity burner, it is characterised in that: the second burning of the first combustion chamber (1) and rear end including front end
The chamber interior volume of room (2), the second combustion chamber (2) is greater than the first combustion chamber (1)；The front end of first combustion chamber (1) is communicated with
Blast tube (4) with fuel gas inlet (3), and the outside of blast tube (4) is then provided with the air with air intake (5)
Channel (6)；The inner end of the blast tube (4) is equipped with gas spray head (7), which is internally provided with combustion
Gas blowout 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 equally distributed primary air spout (9) is then provided on the plug ring (8)；The primary air spout (9) is by air
Channel (6) is connected to the first combustion chamber (1)；And it is additionally provided in second combustion chamber (2) and is 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), should
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；Before wherein
The conical opening of side is contracted to spout throat from large to small, and the rear side conical opening after spout throat changes from small to big to extending out
, to constitute entire flue gas spout.
2. a kind of high heating value high velocity burner according to claim 1, it is characterised in that: the combustion gas spout (16) is set
It is set to and is 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 flue gas spout
(11) taper of front side conical opening is greater than the taper of rear side conical opening in.
3. a kind of high heating value high velocity burner according to claim 1, it is characterised in that: first combustion chamber (1),
Second combustion chamber (2) and flue gas spout (11) are piled up by heat resisting brick (12) to be constituted, and the heat resisting brick (12) is by front end
Heat resisting 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)。
4. a kind of high heating value high velocity burner according to claim 3, it is characterised in that: the auxiliary air spout
(10) it is arranged in the heat resisting brick (12) of front end, and the auxiliary air spout (10) and primary air spout (9)
It is evenly spaced to be provided with 6-12.
5. a kind of high heating value high velocity burner according to claim 3, it is characterised in that: first combustion chamber (1),
Ceramic protective sleeve (13) is provided on the inner wall of second combustion chamber (2) and flue gas spout (11).
6. a kind of high heating value high velocity burner according to claim 1, it is characterised in that: first combustion chamber (1)
Inside it is additionally provided with the ignition tip (14) being communicated with the outside；And it is then provided with and externally protrudes in second combustion chamber (2)
Flame monitor (15).
7. a kind of high heating value high velocity burner according to claim 1, it is characterised in that: the gas spray head (7) is set
It is set to heat resisting steel or ceramic making forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822224631.8U CN209484594U (en) | 2018-12-28 | 2018-12-28 | A kind of high heating value high velocity burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822224631.8U CN209484594U (en) | 2018-12-28 | 2018-12-28 | A kind of high heating value high velocity burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209484594U true CN209484594U (en) | 2019-10-11 |
Family
ID=68128896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822224631.8U Active CN209484594U (en) | 2018-12-28 | 2018-12-28 | A kind of high heating value high velocity burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209484594U (en) |
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2018
- 2018-12-28 CN CN201822224631.8U patent/CN209484594U/en active Active
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