CN107917420A - A kind of burner of regenerative gas radiant tube - Google Patents
A kind of burner of regenerative gas radiant tube Download PDFInfo
- Publication number
- CN107917420A CN107917420A CN201711404147.7A CN201711404147A CN107917420A CN 107917420 A CN107917420 A CN 107917420A CN 201711404147 A CN201711404147 A CN 201711404147A CN 107917420 A CN107917420 A CN 107917420A
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- CN
- China
- Prior art keywords
- air
- heat storage
- muffle cover
- gas
- muffle
- 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
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Classifications
-
- 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
- F23D14/12—Radiant burners
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The present invention relates to a kind of burner of regenerative gas radiant tube, including：Outer tube and its interior heat storage, gas pipeline, nozzle and muffle cover, are provided with the heat storage outside the gas pipeline, and the heat storage is hollow honeycomb structure, and the hollow honeycomb structure forms the first air flue；The muffle cover is connected with the heat storage and is provided with multiple through holes；One end of the gas pipeline is provided with the nozzle, the nozzle is located at the inside of muffle cover and forms the second air flue between the muffle cover, Part I air in first air flue is through the second air flue and contacts fuel gas and burns, Part II air in first air flue enters in the radiant tube through the through hole, with uncombusted contacts fuel gas and burning.Solves a series of problems, such as insufficient, heat storage clogged with soot that burns, heat exchange efficiency reduction, efficiency of heating surface reduction, nitrogen oxides in effluent content is high.
Description
Technical field
The invention belongs to radiant tube technical field, and in particular to a kind of burner of regenerative gas radiant tube.
Background technology
Relatively advanced high temperature air combustion technology is applied on gas fired radiant tubes by heat accumulation type radiant tube, mainly with coal gas
For fuel, in special sealing shroud combustion inner pipe, by heated sleeve surface transferred heat in the form of heat radiation by
Object is heated, combustion product do not contact with heating object, and by the setting of heat storage using covering flue gas after combustion inner pipe
Sensible heat comes warm-up combustion-supporting air or combustion gas, has the characteristics that combustion thermal efficiency is high, stable, equipment dependability is high, extensively should
For various heat-treatment furnaces and continuous annealing furnace etc..
The performance of regenerative gas radiant tube is mainly with combustion thermal efficiency, casing tube wall temperature distributing homogeneity in casing
And NOx discharge is evaluated in flue gas.In recent years, since regenerative gas radiation pipe-in-pipe internal combustion burning institutional framework is unreasonable,
Seriously affect set tube wall Axial Temperature Distribution and Service Life of Casing.
The uniformity of radiant tube surface temperature distribution is to weigh an important indicator of radiant tube performance.It is mainly influenced
The heating quality of radiant tube and the service life of radiant tube etc..And the principal element for influencing radiant tube surface temperature distribution uniformity is combustion
The mixing situation of gas and air.The mixing intensity of combustion gas and air is lower, then incorporation time is elongated, flame elongates, and combustion gas cannot
Completely burned, radiant tube surface temperature distribution uniformity reduce, can also cause combustion gas to waste, reduce the efficiency of heating surface of radiant tube；
If air and the mixing intensity of combustion gas are excessive, incorporation time shortens, flame is too short, can equally make radiant tube surface temperature distribution
Inhomogeneities increases.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of burner of regenerative gas radiant tube, through heat storage
Air after preheating divide two-stage participate in burning, first-stage burning, fuel excess, incomplete combustion, ignition temperature is low, further with
Auxiliary air burns under low oxygen concentration, reduces NO_x formation in combustion process；It can solve insufficient, the heat storage that burns
A series of problems, such as clogged with soot, heat exchange efficiency reduce, and the efficiency of heating surface reduces, and nitrogen oxides in effluent content is high.
To solve the above problems, the technical solution adopted by the present invention is：
A kind of burner of regenerative gas radiant tube, including：Outer tube and its interior heat storage, gas pipeline, nozzle and every
Flame cover, wherein,
It is provided with the heat storage outside the gas pipeline, the heat storage is hollow honeycomb structure, the hollow honeycomb
Shape structure forms the first air flue；
The muffle cover is connected with the heat storage, and multiple through holes are provided with the muffle cover；
One end of the gas pipeline is provided with the nozzle, and the nozzle is located at the inside of muffle cover and between the muffle cover
The second air flue is formed, igniter is provided with the nozzle；
Part I air in first air flue is through the second air flue and contacts fuel gas and burns, and described first is empty
Part II air in gas path enters in the regenerative gas radiant tube through the through hole, is connect with uncombusted combustion gas
Touch and burn.
Further, the both ends of a regenerative gas radiant tube are respectively arranged with a burner, point
Alternately do not heat and discharge flue gas.
Further, further include：Fixing bracket, described muffle cover one end are connected with the heat storage, and the other end passes through institute
State the inside that fixing bracket is fixed on the regenerative gas radiant tube.
Further, the through hole is circumferentially distributed on the muffle cover, and the quantity of the through hole is 3 ~ 6.
Further, the center line of the through hole and the angle of the central axis of the muffle cover are 15 ~ 30 °.
Further, the content of the Part I air accounts for 40 ~ 80% of air content in first air flue.
Further, the content of the Part II air accounts for 20 ~ 60% of air content in first air flue.
Further, the end of the muffle cover forms combustion chamber, and the indoor pressure of burning is -1500Pa.
Further, the muffle cover is in shrink mouth shape.
Further, the muffle cover is ladder tubulose, and the one end being connected with the heat storage is wide section, away from described
One end of heat storage is thin diameter section, and centre is central diameter section, has the step surface of transition, step surface between wide section and central diameter section
It is equipped with the through hole.
The beneficial effects of the present invention are：
Air point two-stage after heat storage preheats participates in burning, first-stage burning, fuel excess, incomplete combustion, burning temperature
Spend low, further burn with auxiliary air under low oxygen concentration, reduce NO_x formation in combustion process；It can solve to burn
Insufficient heat storage clogged with soot, heat exchange efficiency reduce, and the efficiency of heating surface reduces, and nitrogen oxides in effluent content height etc. is a series of to ask
Topic.
Brief description of the drawings
Fig. 1 is the burner overall structure figure of regenerative gas radiant tube of the present invention.
Fig. 2 is muffle cover schematic diagram of the present invention.
Fig. 3 is muffle cover side view of the present invention.
Wherein, heat storage 1, muffle cover 2, through hole 3, flame 4 kept burning day and night, nozzle 5.
Embodiment
In order to make those skilled in the art more fully understand technical scheme, with reference to specific embodiment to this
Invention is described in further detail.It note that the embodiments described below is exemplary, be only used for explaining the present invention, and
It is not considered as limiting the invention.Particular technique or condition are not specified in embodiment, according to document institute in the art
The technology or condition of description are carried out according to product description.Reagents or instruments used without specified manufacturer, being can
With conventional products that are commercially available.
According to an aspect of the present invention, the present invention provides Fig. 1 is that the burning of regenerative gas radiant tube of the present invention fills
Overall structure figure is put, as shown in Figure 1, including：Outer tube and its interior heat storage, gas pipeline, nozzle and muffle cover, wherein, institute
State and the heat storage is provided with outside gas pipeline, the heat storage is hollow honeycomb structure, the hollow honeycomb structure
Form the first air flue；The muffle cover is connected with the heat storage, and multiple through holes are provided with the muffle cover；The combustion
One end of feed channel is provided with the nozzle, and the nozzle is located at the inside of muffle cover and the second sky is formed between the muffle cover
Gas path, is provided with igniter in the nozzle；Part I air in first air flue is through the second air flue
With contacts fuel gas and burning, the Part II air in first air flue enters the radiant tube through the through hole
It is interior, with uncombusted contacts fuel gas and burning.The both ends of one regenerative gas radiant tube are respectively arranged with described in one
Burner, alternately heats and discharges respectively flue gas.
Air point two-stage after heat storage preheats participates in burning, first-stage burning, fuel excess, incomplete combustion, combustion
It is low to burn temperature, further burns with auxiliary air under low oxygen concentration, reduces NO_x formation in combustion process；It can solve
Burn insufficient heat storage clogged with soot, and heat exchange efficiency reduces, and the efficiency of heating surface reduces, and nitrogen oxides in effluent content is high to wait a system
Row problem.
According to a particular embodiment of the invention, Fig. 2 is muffle cover schematic diagram of the present invention, and Fig. 3 is muffle cover side view of the present invention
Figure, as shown in Figures 2 and 3, muffle cover is in integrally shrink mouth shape, through hole is offered on muffle cover, number of openings is 3 ~ 6, circumferential
Uniformly distributed, number of openings is excessive, and participating in primary combustion air capacity reduces, it is difficult to ensures primary combustion effect；Conversely, fail to play this
Invent the effect solved the problems, such as；And through hole center line and the angle of the central axis of the muffle cover are 15 ° ~ 30 °, be ensure that
The high-temperature flue gas after air or burning after preheating divides two parts caused pressure loss reduction during flowing in or out, empty
Qi leel level participates in burning；It ensure that burning tissues rationally, fully.
According to a particular embodiment of the invention, present invention additionally comprises：Fixing bracket, described muffle cover one end and the accumulation of heat
Body connects, and the other end is fixed on the inside of the regenerative gas radiant tube by the fixing bracket.
According to a particular embodiment of the invention, the muffle cover is ladder tubulose, and the one end being connected with the heat storage is
Wide section, is thin diameter section away from one end of the heat storage, and centre is central diameter section, has transition between wide section and central diameter section
Step surface, step surface is equipped with the through hole.
According to a particular embodiment of the invention, the end of muffle cover forms combustion chamber, and internal pressure of combustion chamber is controllable, keeps
In -1500Pa or so.Combustion-supporting air into the front end of the muffle cover, and is divided into two parts after heat storage preheating,
In order to realize that hypoxemia operating mode is burnt, discharged nitrous oxides, Part I air are reduced（40-80%）, be preferably 50-70% air
After flowing through the nozzle 5, the combustion gas mixing with nozzle center ejection, igniter generates flame kept burning day and night, in the length
On the premise of naked light flame provides heat source, primary combustion occurs in the muffle cover end, at this time fuel excess, not exclusively combustion occurs
Burn, ignition temperature is relatively low；Part II air（20-60%）, the air preferably after 30%-50% heat is through being opened in the muffle cover
On through hole, in radiant tube further with uncombusted flue gas mixed combustion before, and finally in the radiant tube formed temperature
Degree is evenly distributed, burn complete flame, flame temperature is low compared with traditional combustion mode and combustion chamber in be in Hypoxic habitats, burning
The nitrogen oxides that process is formed is reduced；During corresponding side smoke evacuation, similarly, high-temperature flue gas is divided into two parts：A part
Flow through nozzle and enter the heat storage；Another part enters heat storage through being opened in aperture on the muffle cover.
Embodiment one
According to burner Design cooling load, the room temperature combustion air of certain flow reaches 900 DEG C after heat storage preheating, with when
30 ~ 50m/s of state speed enters the muffle cover front end, divides two parts to participate in burning, and number of openings is opened up on the muffle cover as 6
It is a, it is circumferential uniformly distributed, and through hole center line and horizontal line angle are 15 °, air is after heat storage preheating, into the muffle
Front end is covered, is divided into two parts：After 70% air flows through the nozzle with vane cyclone, combustion-supporting sky after preheating is further improved
Gas velocity, the combustion gas mixing sprayed with the nozzle center（Fuel-rich）, the premise of heat source is provided in the flame kept burning day and night
Under, start primary combustion in the muffle cover end, and combustion chamber is formed in the muffle cover, at this time fuel excess；It is remaining
Through hole of 30% air through being opened on the muffle cover be directly entered in radiant tube and mix progress with uncombusted flue gas before
Second-time burning, is axially formed homogeneous temperature field, radiation tube wall local temperature difference is decreased within 50 DEG C, nitrogen in flue gas in radiant tube
Oxide growing amount reduces by 30%, and radiant tube surface temperature axial direction distributing homogeneity is improved, the service life of radiant tubes service life, combustion
Burn efficiency and improve 10%.Similarly, during corresponding side smoke evacuation, high-temperature flue gas is divided into two parts：A part is flowed through described in nozzle entrance
Heat storage；Through hole of the another part through being opened on the muffle cover enters heat storage.
The burner of regenerative gas radiant tube of the invention in summary, the air point two-stage after heat storage preheats
Burning is participated in, first-stage burning, fuel excess, incomplete combustion, ignition temperature is low, further with auxiliary air in low oxygen concentration
Lower burning, reduces NO_x formation in combustion process；It can solve insufficient heat storage clogged with soot that burns, heat exchange efficiency drop
Low, the efficiency of heating surface reduces, a series of problems, such as nitrogen oxides in effluent content is high.
In the description of the present invention, it is to be understood that term " first ", " second " are only used for description purpose, and cannot
It is interpreted as indicating or implies relative importance or imply the quantity of the technical characteristic indicated by indicating.Thus, define " the
One ", one or more this feature can be expressed or be implicitly included to the feature of " second ".
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
Combined in an appropriate manner in a or multiple embodiments or example.In addition, without conflicting with each other, the skill of this area
Art personnel can be tied the different embodiments or example described in this specification and different embodiments or exemplary feature
Close and combine.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification, meanwhile, for those of ordinary skill in the art, the think of according to the application
Think, in specific embodiments and applications there will be changes.
Claims (10)
- A kind of 1. burner of regenerative gas radiant tube, it is characterised in that including：Outer tube and its interior heat storage, combustion gas Pipeline, nozzle and muffle cover, wherein, the heat storage is provided with outside the gas pipeline, the heat storage is hollow honeycomb Shape structure, the hollow honeycomb structure form the first air flue；The muffle cover is connected with the heat storage, the muffle Multiple through holes are provided with cover；One end of the gas pipeline is provided with the nozzle, and the nozzle is located at the inside of muffle cover And the second air flue is formed between the muffle cover, it is provided with igniter in the nozzle；In first air flue Part I air is through the second air flue and contacts fuel gas and burns, the Part II air in first air flue Enter through the through hole in the regenerative gas radiant tube, with uncombusted contacts fuel gas and burning.
- 2. device according to claim 1, it is characterised in that the both ends of a regenerative gas radiant tube are set respectively A burner is equipped with, alternately heats and discharge respectively flue gas.
- 3. device according to claim 1, it is characterised in that further include：Fixing bracket, described muffle cover one end with it is described Heat storage connects, and the other end is fixed on the inside of the regenerative gas radiant tube by the fixing bracket.
- 4. device according to claim 1, it is characterised in that the through hole is circumferentially distributed on the muffle cover, described The quantity of through hole is 3 ~ 6.
- 5. device according to claim 1, it is characterised in that the central shaft of the center line of the through hole and the muffle cover The angle of line is 15 ~ 30 °.
- 6. device according to claim 1, it is characterised in that the content of the Part I air accounts for first air The 40 ~ 80% of air content in path.
- 7. device according to claim 1, it is characterised in that the content of the Part II air accounts for first air The 20 ~ 60% of air content in path.
- 8. device according to claim 1, it is characterised in that the end of the muffle cover forms combustion chamber, the burning Indoor pressure is -1500Pa.
- 9. device according to claim 1, it is characterised in that the muffle cover is in shrink mouth shape.
- 10. device according to claim 1, it is characterised in that the muffle cover is ladder tubulose, is connected with the heat storage The one end connect is wide section, is thin diameter section away from one end of the heat storage, and centre is central diameter section, wide section and central diameter section it Between there is the step surface of transition, step surface is equipped with the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404147.7A CN107917420A (en) | 2017-12-22 | 2017-12-22 | A kind of burner of regenerative gas radiant tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404147.7A CN107917420A (en) | 2017-12-22 | 2017-12-22 | A kind of burner of regenerative gas radiant tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107917420A true CN107917420A (en) | 2018-04-17 |
Family
ID=61893927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711404147.7A Pending CN107917420A (en) | 2017-12-22 | 2017-12-22 | A kind of burner of regenerative gas radiant tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107917420A (en) |
-
2017
- 2017-12-22 CN CN201711404147.7A patent/CN107917420A/en active Pending
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