CN203927906U - Fuel nozzle and burner - Google Patents
Fuel nozzle and burner Download PDFInfo
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- CN203927906U CN203927906U CN201420312353.0U CN201420312353U CN203927906U CN 203927906 U CN203927906 U CN 203927906U CN 201420312353 U CN201420312353 U CN 201420312353U CN 203927906 U CN203927906 U CN 203927906U
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- fuel
- film pipe
- atomizing medium
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Abstract
The utility model discloses a kind of fuel nozzle and burner, fuel nozzle comprises nozzle body and is positioned at the spout of nozzle body front end, on nozzle body, there is the import being communicated with atomizing medium and the inlet being communicated with liquid fuel, the film pipe that is formed with enclosure space in nozzle body and passes this enclosure space, atomizing medium import is communicated with enclosure space, the rear end of film pipe is communicated with inlet, front end and spout connection.Therefore, atomizing medium enters after the enclosure space of nozzle body tube side and the fuel oil that can enter film pipe by fenestra to be mixed, by fenestra micropore diffusion technique, atomizing medium is fractured into micro-bubble and is scattered in liquid phase, form even and fine gas-liquid two-phase atomized flow, realize liquid fuel as raw material oil atomization.Wherein, liquid fuel atomization particle diameter is little, narrow diameter distribution, thus can make liquid fuel combustion fully be difficult for coking.
Description
Technical field
The utility model relates to oil inflame field, particularly, relates to the burner of a kind of fuel nozzle and this fuel nozzle of use.
Background technology
In fields such as chemical industry, oil refining, commonly use the burner for heating boiler etc., wherein the different nozzles that use of based on fuel are mainly divided into gas nozzle and fuel nozzle.Fuel nozzle uses as liquid fuels such as fuel oils, fuel oil with the atomizing medium mixed aerosol such as air after in the burning of nozzle.In combustion process, atomizing of liquid fuel effect is determining the utilization rate of fuel.If liquid fuel atomization is insufficient, will cause oil inflame insufficient, cause occurring the problems such as coking, plug nozzle.The method of liquid fuel atomization mainly contains: the forms such as pressure type atomization, internal-mixing atomization, exterior mixing atomization.Wherein, for pressure atomized fog jet, the atomizer adopting is fairly simple, but duty ratio is narrow, for the system with wider mobile excursion demand, needs nozzle to change; For external mixing type atomizer, the nozzle adopting is conventionally very coarse, and flame profile and atomization quality are not best conventionally.Comparatively speaking, internal-mixing atomizing oil jet nozzle can produce excellent flame profile, heat is transmitted and desirable oil droplet distribution uniformly, but the general Sauter mean diameter of the oil droplet of atomization is at 80 μ m.Therefore, the mechanism of correlative study both at home and abroad is constantly developing and is releasing new and effective internal-mixing fuel nozzle always, to adapt to the development need of combustion technology and to obtain larger economic benefit.
The atomizer of early stage domestic use mostly is wikipedia type nozzle, this nozzle atomization effect is poor, average grain diameter is many at 80-100 μ m, on this basis through after improving, has formed as the two venturi internal-mixing feed nozzles as described in the nozzle as described in CN2069757U and CN2054461U; The high efficiency nozzle such as the UPC-a that CCKXing He China University Of Petroleum Beijing is studied in addition in addition, NS-1 type.The external representational Molil of having and Kellog company have developed a kind of Novel feed nozzle Atomax in 1994; Uop Inc. has developed Optimix nozzle in nineteen ninety-five, and its atomization average diameter is in 60 μ m left and right.R. the Deere etc. of shutting out has proposed emulsion atomizer nozzle applicable under oxygen enrichment hot conditions at patent CN1807983A.
The shortcoming that all kinds of nozzles exist is above: more than atomization average grain diameter is mostly 60 μ m; Some vapour phase speed is excessive, and some even meets or exceeds velocity of sound, thereby causes flowing instability, fluctuation is large, energy consumption is large; Some atomizations are inhomogeneous, bulky grain shared ratio large; High nozzle temperature may cause inner coke laydown and spray nozzle clogging etc.
Utility model content
The burner that the purpose of this utility model is to provide a kind of fuel nozzle and uses this fuel nozzle, this fuel nozzle fuel atomization effect is good, and liquid fuel combustion is fully difficult for coking.
To achieve these goals, according to an object of the present utility model, a kind of fuel nozzle is provided, comprise nozzle body and the spout that is positioned at nozzle body front end, on described nozzle body, there is the atomizing medium import being communicated with atomizing medium and the inlet being communicated with liquid fuel, in described nozzle body, be formed with enclosure space, and described fuel nozzle also comprises the film pipe through this enclosure space, described atomizing medium import is communicated with described enclosure space, the rear end of described film pipe is communicated with described inlet, front end and described spout connection.
Preferably, be formed with the collection chamber being communicated with described inlet in described nozzle body, described film pipe is many and is communicated with described collection chamber respectively.
Preferably, be formed with the hybrid chamber with described spout connection in described nozzle body, the front end of described film pipe is communicated with this hybrid chamber.
Preferably, the sectional area of described hybrid chamber increases towards described spout gradually from described film pipe.
Preferably, the sectional area of described hybrid chamber increases towards described film pipe gradually from described spout.
Preferably, described hybrid chamber comprises the first conical section, drum-shaped section and the second conical section of arranging successively from back to front, the sectional area of described the first conical section increases towards described drum-shaped section gradually from described film pipe, and the sectional area of described the second conical section reduces towards described spout gradually from described drum-shaped section.
Preferably, described film is tubular becomes the inorganic film tube that average pore size is 1nm-50 μ m.
Preferably, described atomizing medium import is a plurality of, wherein a plurality of described atomizing medium imports circumferentially all should arrange around described enclosure space.
According on the other hand of the present utility model, a kind of burner is provided, this burner comprises the fuel nozzle that the utility model provides, and is connected to the conveyance conduit on described atomizing medium import and described inlet.
Preferably, described burner comprises control device, and this control device comprises the flow that is arranged on described conveyance conduit and/or pressure-control valve, flow and/or pressure-detecting device and the controller being electrically connected to described flow and/or pressure-control valve and described flow and/or pressure-detecting device respectively.
By technique scheme, atomizing medium enter after the enclosure space after nozzle body can logical filmed passing tube fenestra enter film pipe tube side and and fuel oil mix.By the micropore diffusion technique of fenestra, atomizing medium is fractured into micro-bubble and is scattered in liquid phase, forms even and fine gas-liquid two-phase atomized flow, realizes liquid fuel as raw material oil atomization.This gas-liquid two-phase contact, crumbling method, can reduce atomizing medium consumption, reduces atomizing medium speed.Wherein, liquid fuel atomization particle diameter is little, narrow diameter distribution, and atomizing effect is good, thereby can make liquid fuel combustion fully be difficult for coking, and does not need larger aerodynamic force, reduces energy loss, and energy consumption is low, has reached the effect of energy-saving and emission-reduction.In addition, in the atomizing type providing at the utility model, when inlet amount is to some extent during increase and decrease, the volume flow of mixture two phase flow changes relatively little, can obviously not affect atomization quality, thereby makes that operating flexibility of the present utility model is good, reliability is high.That the utility model also has advantages of is simple in structure, easy to use, be easy to promote.
Other feature and advantage of the present utility model partly in detail are described the specific embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for description, is used from explanation the utility model, but does not form restriction of the present utility model with the specific embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of the fuel nozzle that provides of the utility model preferred embodiment;
Fig. 2 is the sectional structure schematic diagram along the line A-A intercepting in Fig. 1;
Fig. 3 is the structural representation of the spout of the fuel nozzle that provides of the utility model preferred embodiment.
Description of reference numerals
1 nozzle body 2 spouts
3 film pipe 4 enclosure spaces
5 collection chamber 6 hybrid chambers
7 conveyance conduits
11 atomizing medium import 12 oil-ins
61 first conical section 62 drum-shaped sections
63 second conical section 81 flows and/or pressure-control valves
82 flows and/or pressure-detecting device 83 controllers
91 feed pump 92 compressors
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is elaborated.Should be understood that, the specific embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
In the utility model, in the situation that not doing contrary explanation, the noun of locality of use illustrates that as " forward and backward " flow direction of liquid fuel is that benchmark defines, and liquid fuel flows forward.Particularly as shown in Figure 1, the right side in page is front, after left side is.This noun of locality, only for the utility model is described, is not limited to the utility model.
As shown in Figure 1 to Figure 3, the utility model is for the burner of a kind of fuel nozzle and this fuel nozzle, and it can be for the heating of the containers such as the Industrial Boiler in the fields such as chemical industry, oil refining, heating furnace, kiln, smelting furnace, incinerator.As shown in Figure 1, the fuel nozzle that the utility model provides comprises nozzle body 1 and is positioned at the spout 2 of nozzle body 1 front end, on nozzle body 1, have with the atomizing medium atomizing medium import 11 that for example water vapour is communicated with and with the liquid fuel inlet 12 that for example fuel oil is communicated with, in nozzle body 1, be formed with enclosure space 4, and fuel nozzle also comprises the film pipe 3 through this enclosure space 4, atomizing medium import 11 is communicated with enclosure space 4, the rear end of film pipe 3 is communicated with inlet 12, and front end is communicated with spout 2.
Therefore, atomizing medium enters in the tube side that can only enter by the fenestra on film tube wall film pipe 3 after the enclosure space 4 of nozzle body 1 to mix with fuel oil.Wherein, film pipe 3 is for having the tubular film structure of the filter effect of micro/nano level in this area, and therefore, by the micropore diffusion technique of fenestra, atomizing medium is fractured into micro-bubble and is scattered in liquid phase, forms even and fine two-phase atomized flow, realizes fuel oil atomization.The contact of this gas-liquid two-phase, crumbling method, can reduce atomizing medium body consumption, reduces atomizing medium speed, so nozzle operates steadily, and can not produce pulsation.Through this mode, special design produces very little pressure drop to atomizing medium body.Wherein, atomizing of liquid fuel particle diameter is little, narrow diameter distribution, and atomizing effect is good, therefore can make liquid fuel combustion fully be difficult for coking, and not need larger aerodynamic force, reduces energy loss, and energy consumption is low, has reached the effect of energy-saving and emission-reduction.In addition, in the atomizing type providing at the utility model, when inlet amount is to some extent during increase and decrease, the volume flow of mixture two phase flow changes relatively little, can obviously not affect atomization quality, thereby makes that operating flexibility of the present utility model is good, reliability is high.That the utility model also has advantages of is simple in structure, easy to use, be easy to promote.
It should be noted that, the embodiment that can complete technique scheme has multiple, for example " atomizing medium " can be water, steam, air, oxygen, oxygen-enriched combusting agent, natural gas, propane, nitrogen, carbon dioxide, hydrogen, or two or more mixtures in these atomizing mediums etc." liquid fuel " can be for distillate oil, slip out fuel oil, diesel oil, kerosene, fuel oil, Residual oil, residual fuel oil and other fuel wet goods well known by persons skilled in the art." film pipe 3 " can be preferably the inorganic film tube of ceramic-film tube, metal film pipe or other inorganic, to be more suitable for hot environment.In addition, therefore the arrangement of the inner space of nozzle body 1 and film pipe 3 also has multiple, and the utility model for convenience of description, introduces preferred embodiment wherein at this, this preferred embodiment, only for the utility model is described, is not limited to the utility model.
In preferred embodiment of the present utility model, preferably, the average pore size 1nm-50 μ m of film pipe 3.Therefore, the atomizing medium by this film periosteum hole can be the drop that particle diameter is less than 50 μ m by liquid fuel atomization, makes better effects if of the present utility model.In addition, the quantity of film pipe 3 can also can be many for one, and in preferred embodiment of the present utility model, as depicted in figs. 1 and 2, film pipe 3 is many, and these many film pipes 3 can be arranged in enclosure space 4 equably.For convenient, for many film pipes 3 provide fuel oil, preferably, be formed with the collection chamber 5 being communicated with inlet 12 in nozzle body 1, film pipe 3 is many and is communicated with collection chamber 5 respectively.First fuel oil renew after by inlet 12 in collection chamber 5, then in entering each film pipe 3.Because film pipe 3 is many, increased the contact area of the outer wall of atomizing medium and film pipe 3, make atomizing medium 3 more efficiently with fuel oil mixed aerosol.
In addition, in the utility model, atomizing medium can from nozzle body 1 one-sided enter also can bilateral or more sides enter, when realizing many sides and enter, atomizing medium import 11 is a plurality of, wherein a plurality of atomizing medium imports 11 circumferentially all should arrange around enclosure space 4.Thereby effectively guarantee the especially even contact of many film pipes of film pipe 3 in atomizing medium and enclosure space 4, the efficiency and the effect that to improve atomizing medium, enter film pipe.
Wherein, in the utility model, the logical filmed passing tube 3 of atomizing medium has been realized the one-level atomization of fuel oil, and the utility model can also make fuel oil carry out secondary atomization.Particularly, as shown in Figure 1, be formed with the hybrid chamber 6 being communicated with spout 2 in nozzle body 1, the front end of film pipe 3 is communicated with this hybrid chamber 6, and hybrid chamber 6 has the actual internal area that is greater than film pipe 3 and spout 2.That is, the layout in nozzle body 1 is that collection chamber 5, enclosure space 4 and hybrid chamber 6 are arranged from back to front successively.Therefore, hybrid chamber 6 provides and has been greater than the blending space of film pipe and can entering this space of the front contraction of spout 2.Therefore, motion from film pipe 3 and first broken drop pressure in hybrid chamber 6 of going out can decrease, expands the gas componant in heterogeneous atomized flow, thereby makes pigment fluid drip further fragmentation, and to spout 2 motions.Then, due to atomized flow, the space contraction portion before entering spout 2 is accelerated, heterogeneous material, and for example gas-liquid two-phase material produces very large shearing force in very little region, makes drop more tiny; Simultaneously, because the liquid stream after ejection spout 2 obtains pressure release, in atomized flow, the volume of atomizing medium expands rapidly, makes fuel oil further broken, refinement the particle diameter of drop.Thereby realized the secondary-atomizing of fuel oil.Like this, under very little pressure drop, just make fuel oil and atomizing medium form all thin multiphase flow, refinement is even more to make atomizing particle, and sufficient combustion reduces coking phenomenon, and can accomplish to guarantee long period safety operation requirement.
In order to increase the effect of secondary-atomizing, preferably, the sectional area of hybrid chamber 6 increases towards spout 2 gradually from film pipe 3, thereby makes the actual internal area of fuel oil can become gradually the position, dead angle of having avoided greatly sudden change to bring, to improve fuel utilization ratio.And can guarantee flowing of fuel oil that fluctuation suddenly can not occur and affect combustion efficiency and security.And more preferably, the sectional area of hybrid chamber 6 increases towards film pipe 3 gradually from spout 2.That is, towards the flow section of spout 2, diminish gradually, thus the position, dead angle of having avoided equally sudden change to bring, and guarantee stability and the combustion efficiency that liquid is mobile.
Particularly, as shown in Figure 1, in preferred embodiment of the present utility model, hybrid chamber 6 comprises the first conical section 61, drum-shaped section 62 and the second conical section 63 of arranging successively from back to front, the sectional area of the first conical section 61 increases towards drum-shaped section 62 gradually from film pipe 3, the sectional area of the second conical section 63 reduces towards spout 2 gradually from drum-shaped section 62, therefore can guarantee the secondary-atomizing effect of fuel oil.Drum-shaped section 62 wherein can form the certain column structure of sectional area, also can form other structures.Conical section can be the linear change structures such as circular cone, polygon wimble structure, also can form other streamlined structures of spherical, the elliposoidal of nonlinear change.Corresponding this type of mode of texturing all should drop in protection domain of the present utility model.
In addition, as shown in Figure 3, in preferred embodiment of the present utility model, spout can be one and form rectangular configuration.In addition, in other embodiments, spout can also be one above and form the structures such as other thin-and-longs, triangle, fan-shaped, semicircle bar seam, for this type of distortion, all drop in protection domain of the present utility model.
As shown in Figure 1, in the burner providing at the utility model, on atomizing medium import 11 and inlet 12, be connected with respectively conveyance conduit 7, wherein the conveyance conduit 7 of atomizing medium import 11 can be realized pressurization and the conveying of gas phase atomizing medium by compressor 92, also can realize by pumping installations pressurization and the conveying of the liquid phase atomizing mediums such as water.On the conveyance conduit 7 of inlet 12, by feed pump 91, realize pressurization and the conveying of fuel wet goods liquid fuel.Complete for greater safety and efficiently fluid combustion, preferably, the burner that the utility model provides comprises control device, and this control device comprises the flow that is arranged on conveyance conduit 7 and/or pressure-control valve 81, flow and/or pressure-detecting device 82 and the controller 83 being electrically connected to flow and/or pressure-control valve 81 and flow and/or pressure-detecting device 82 respectively.Therefore, the close loop control circuit forming by controller and checkout gear, air inlet and the feed liquor process automation that can make the utility model provide, and effectively guarantee the security of liquid and atomizing medium.Wherein, controller can be for being built in computer and being provided with atomizing medium and the flow of liquid, pressure threshold, thereby by the flow of checkout gear collection feedback and pressure instantaneous value and respective threshold are compared, to control respective valves according to the control logic of formulating, carry out pressure and Flow-rate adjustment, thereby realize automatic, the safe conveying of atomizing medium and liquid fuel.Particularly, according to user's safety, flow automatic control unit or pressure automatic control unit can be only set, also can the two all arrange, for various modes of texturing, all drop in protection domain of the present utility model.
To sum up, the micro-atomizing medium that the fenestra height of formation of the logical filmed passing tube of fuel nozzle that the utility model provides disperses reaches mixing of height with the liquid fuel such as fuel oil in film pipe tube side, realizes the one-level atomization of liquid fuel.And further, can realize by hybrid chamber the secondary atomization of liquid fuel.Thereby can guarantee abundant atomization and the combustion efficiency of liquid fuel, and operating flexibility is large, the thermal efficiency is high, simple to operate, can bring considerable economic benefit.The burner of the fuel nozzle that therefore, the utility model provides and this fuel nozzle of use all has higher practicality and promotional value.
Below describe by reference to the accompanying drawings preferred embodiment of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each concrete technical characterictic described in the above-mentioned specific embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible combinations.
In addition, between various embodiment of the present utility model, also can be combined, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. a fuel nozzle, comprise nozzle body (1) and be positioned at the spout (2) of nozzle body (1) front end, on described nozzle body (1), there is the atomizing medium import (11) being communicated with atomizing medium and the inlet (12) being communicated with liquid fuel, it is characterized in that, in described nozzle body (1), be formed with enclosure space (4), and described fuel nozzle also comprises the film pipe (3) through this enclosure space (4), described atomizing medium import (11) is communicated with described enclosure space (4), the rear end of described film pipe (3) is communicated with described inlet (12), front end is communicated with described spout (2).
2. fuel nozzle according to claim 1, it is characterized in that, in described nozzle body (1), be formed with the collection chamber (5) being communicated with described inlet (12), described film pipe (3) is many and is communicated with described collection chamber (5) respectively.
3. fuel nozzle according to claim 1 and 2, is characterized in that, is formed with the hybrid chamber (6) being communicated with described spout (2) in described nozzle body (1), and the front end of described film pipe (3) is communicated with this hybrid chamber (6).
4. fuel nozzle according to claim 3, is characterized in that, the sectional area of described hybrid chamber (6) increases towards described spout (2) gradually from described film pipe (3).
5. fuel nozzle according to claim 3, is characterized in that, the sectional area of described hybrid chamber (6) increases towards described film pipe (3) gradually from described spout (2).
6. fuel nozzle according to claim 3, it is characterized in that, described hybrid chamber (6) comprises the first conical section (61), drum-shaped section (62) and the second conical section (63) of arranging successively from back to front, the sectional area of described the first conical section (61) increases towards described drum-shaped section (62) gradually from described film pipe (3), and the sectional area of described the second conical section (63) reduces towards described spout (2) gradually from described drum-shaped section (62).
7. fuel nozzle according to claim 1, is characterized in that, described film pipe (3) forms the inorganic film tube that average pore size is 1nm-50 μ m.
8. fuel nozzle according to claim 1, is characterized in that, described atomizing medium import (11) is a plurality of, wherein a plurality of described atomizing medium imports (11) circumferentially all should arrange around described enclosure space (4).
9. a burner, it is characterized in that, this burner comprises according to the fuel nozzle described in any one in claim 1-8, and is connected to the conveyance conduit (7) on described atomizing medium import (11) and described inlet (12).
10. burner according to claim 9, it is characterized in that, described burner comprises control device, and this control device comprises the flow that is arranged on described conveyance conduit (7) and/or pressure-control valve (81), flow and/or pressure-detecting device (82) and the controller (83) being electrically connected to described flow and/or pressure-control valve (81) and described flow and/or pressure-detecting device (82) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420312353.0U CN203927906U (en) | 2014-06-12 | 2014-06-12 | Fuel nozzle and burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420312353.0U CN203927906U (en) | 2014-06-12 | 2014-06-12 | Fuel nozzle and burner |
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| Publication Number | Publication Date |
|---|---|
| CN203927906U true CN203927906U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420312353.0U Active CN203927906U (en) | 2014-06-12 | 2014-06-12 | Fuel nozzle and burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132338A (en) * | 2014-06-12 | 2014-11-05 | 北京中天元环境工程有限责任公司 | Fuel nozzle and combustor |
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2014
- 2014-06-12 CN CN201420312353.0U patent/CN203927906U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132338A (en) * | 2014-06-12 | 2014-11-05 | 北京中天元环境工程有限责任公司 | Fuel nozzle and combustor |
| CN104132338B (en) * | 2014-06-12 | 2017-01-25 | 北京中天元环境工程有限责任公司 | Fuel nozzle and combustor |
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