CN102287826B - Combustion nozzle and coal gasification furnace - Google Patents
Combustion nozzle and coal gasification furnace Download PDFInfo
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- CN102287826B CN102287826B CN 201110199661 CN201110199661A CN102287826B CN 102287826 B CN102287826 B CN 102287826B CN 201110199661 CN201110199661 CN 201110199661 CN 201110199661 A CN201110199661 A CN 201110199661A CN 102287826 B CN102287826 B CN 102287826B
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Abstract
The invention discloses a combustion nozzle and a coal gasification furnace. The combustion nozzle comprises a nozzle body; a fuel channel, a combustion-supporting air channel and a cooling channel are arranged in the nozzle body; and the front end of the nozzle body is provided with a cooling cavity, wherein a spiral pipeline communicated with the cooling channel is embedded in the cooling cavity to form a spiral cooling runner. In the combustion nozzle and the coal gasification furnace, the spiral pipeline is embedded in the cooling cavity to form the spiral cooling runner, so the spiral cooling runner is an independent pipeline and unnecessarily in bevel connection with a wall surface of the nozzle body, and phenomenon that the cooling cavity is cracked due to big temperature difference between bevels, non-uniform stress and heat fatigue can be eliminated. By the technical scheme, the structure of the cooling cavity of the combustion nozzle is optimized, the damage probability due to metal fatigue is reduced, the service life of the combustion nozzle is prolonged, and the operation reliability of the combustion nozzle is improved.
Description
Technical field
The present invention relates to the combustion apparatus structure technology, relate in particular to a kind of burner noz(zle) and coal gasifier.
Background technology
Burner noz(zle) is general combustion component, and it is widely used in the various combustion apparatus, as engine, boiler, coal gasifier etc.
The typical structure of burner noz(zle) as shown in Figure 1, burner noz(zle) has and is roughly housing 10 cylindraceous, be provided with fuel channel 20 and combustion-supporting gas channel 30 in the housing 10, the combustion-supporting gas that the fuel that fuel channel 20 feeds and combustion-supporting gas channel 30 feed mixes at nozzle-end, through lighting formation flame.Burner noz(zle) can be divided into air-breathing formula, oxygen-enriched combustion-supporting formula and pure oxygen burning-assist three classes according to the difference of combustion-supporting gas gas ingredients.Oxygen content reaches more than 20% in the combustion-supporting gas in the oxygen-enriched combustion-supporting formula nozzle, and pure oxygen burning-assist nozzle then adopts the combustion-supporting gas of oxygen content more than 99%.
For the burner noz(zle) of said structure, the fuel in the nozzle and combustion-supporting gas spray simultaneously, light formation flame.Flame has a space D apart from the front end of nozzle, and usually, the numerical value of the more high space D of the oxygen content in the combustion-supporting gas is more little; Pressure in the burner hearth is more high, and the numerical value of space D is more little.Because the temperature higher (flame core place temperature is above 2000 ℃) of flame.Even according to 1500 ℃ of calculating of flame core temperature, also can make the surface of spray nozzle front end reach the high temperature that is difficult to bear.This service life and functional reliability to nozzle is all influential.
Prior art has proposed some solutions for addressing this problem, and is the technical scheme that proposes in 200620045550.6 and 88108098.5 the Chinese patent application as application number.In this technical scheme, the cooling chamber of nozzle-end constitutes by helical form wing muscle is set.But there is following defective in this technology:
Wing muscle is connected for the knuckle type with the wall of cooling chamber, no matter be one-body molded or welding fixing, beveled structure all exists the knuckle junction different with the temperature of other positions, therefore the inhomogeneous problem that meets with stresses is easy to the cracking breakage.In a single day the cooling chamber of wing muscle structure damages, and its maintenance difficult need be carried out integral replacing to nozzle-end.The working seal of wing muscle structure cooling chamber is poor, reliability is low, takes place can't guide flow of coolant, even can make cooling agent mass flowing nozzle outside, the influence burning after the breakage of wing muscle cracking.
Summary of the invention
The invention provides a kind of burner noz(zle) and coal gasifier, to optimize the structure of cooling chamber, reduce the inhomogeneous and disrepair phenomenon that causes of stress.
The embodiment of the invention provides a kind of burner noz(zle), comprise nozzle body, be provided with fuel channel, combustion-supporting gas channel and cooling duct in the described nozzle body, the nozzle body front end is provided with cooling chamber, wherein: be embedded with the helical form pipeline that is communicated with the cooling duct in the described cooling chamber, to form the helical form coolant flow channel.
Aforesaid burner noz(zle), preferably: the shape of cross section of described helical form pipeline is circular or oval.
Aforesaid burner noz(zle), preferably: described cooling chamber is fastened by nozzle body front end wall and cover cap and is welded.
Aforesaid burner noz(zle), preferably: be formed with groove on one or two end face of described cooling chamber, the form fit of the shape of described groove and described helical form pipeline is fastened described helical form pipeline in cooling chamber.
Aforesaid burner noz(zle), preferably: be formed with a plurality of pins on one or two end face of described cooling chamber, described helical form pipeline is wrapped between the pin to be fixed.
Aforesaid burner noz(zle), preferably: described cooling chamber is formed with a plurality of pins on the end face in the burner noz(zle) outside, the helical form pipeline is wrapped between the pin to be fixed; Described cooling chamber forms groove on the end face of burner noz(zle) inboard, the form fit of the shape of described groove and described helical form pipeline is fastened described helical form pipeline in cooling chamber.
Aforesaid burner noz(zle), preferably: be formed with mozzle in the described cooling duct, described mozzle docks with described helical form pipeline.
Aforesaid burner noz(zle), preferably: the shape of cross section of described cooling duct is annular, and described mozzle is spirally wound in the described cooling duct.
Aforesaid burner noz(zle), preferably: the described mozzle that spiral twines is arranged on described cooling duct and supplies with in the part passage of cooling fluid.
Aforesaid burner noz(zle), preferably: described cooling duct is communicated with respectively with cooling chamber outside described helical form pipeline and the helical form pipeline.
Aforesaid burner noz(zle), preferably: the quantity of described cooling duct is at least two, and wherein at least one cooling duct is communicated with described helical form pipeline, and another cooling duct is communicated with cooling chamber outside the described helical form pipeline at least.
Aforesaid burner noz(zle), preferably: described helical form pipeline is copper pipe, carbon steel pipe or stainless steel tube.
Aforesaid burner noz(zle), preferably: described fuel channel arranges along longitudinal center's axis of described nozzle body, and described combustion-supporting gas channel is looped around the outside of described fuel channel, and described cooling duct is looped around the outside of described combustion-supporting gas channel.
Aforesaid burner noz(zle), preferably: the cooling duct that is used for supplying with cooling fluid and be used for the backflow cooling fluid all is arranged on the homonymy of described housing.
The present invention also provides a kind of coal gasifier, comprises burner noz(zle) provided by the present invention.
Burner noz(zle) provided by the invention and coal gasifier, form the helical form coolant flow channel by in cooling chamber, being embedded the helical form pipeline, make the helical form coolant flow channel be pipeline independently, needn't with the wall of nozzle body between form the knuckle type and be connected, so can eliminate because of the knuckle place temperature difference greatly, the cooling chamber cracking phenomena that causes of unbalanced stress and heat fatigue.Technical scheme of the present invention has been optimized the structure of burner noz(zle) cooling chamber, reduces the metal fatigue probability of damage, has improved life-span and the reliability of burner noz(zle) work.
Description of drawings
Fig. 1 is the structural representation of existing typical burner noz(zle);
The structural representation of the burner noz(zle) that Fig. 2 A provides for the embodiment of the invention one;
Fig. 2 B is along the sectional structure schematic diagram of A-A line among Fig. 2 A;
The structural representation of the burner noz(zle) that Fig. 3 A provides for the embodiment of the invention two;
Fig. 3 B is along the sectional structure schematic diagram of B-B line among Fig. 3 A;
Fig. 3 C is along the sectional structure schematic diagram of C-C line among Fig. 3 A;
The partial structurtes schematic diagram of the burner noz(zle) that Fig. 4 provides for the embodiment of the invention three;
The partial structurtes schematic diagram of the burner noz(zle) that Fig. 5 provides for the embodiment of the invention four;
The partial structurtes schematic diagram of the burner noz(zle) that Fig. 6 provides for the embodiment of the invention five;
The sectional structure schematic diagram of the burner noz(zle) that Fig. 7 provides for the embodiment of the invention six;
The sectional structure schematic diagram of the burner noz(zle) that Fig. 8 provides for the embodiment of the invention seven.
The specific embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Embodiment one
The structural representation of the burner noz(zle) that Fig. 2 A provides for the embodiment of the invention one, Fig. 2 B is along the sectional structure schematic diagram of A-A line among Fig. 2 A, this burner noz(zle) comprises nozzle body 10, be provided with fuel channel 20, combustion-supporting gas channel 30 and cooling duct 40 in the nozzle body 10, nozzle body 10 front ends are provided with cooling chamber 50, wherein, be embedded with the helical form pipeline 60 that is communicated with cooling duct 40 in the cooling chamber 50, to form the helical form coolant flow channel.
Present embodiment is a kind of preferred structure of burner noz(zle), and fuel channel 20 arranges along longitudinal center's axis of nozzle body 10, and combustion-supporting gas channel 30 is looped around the outside of fuel channel 20, and cooling duct 40 can be arranged on the outside of combustion-supporting gas channel 30.And, the cooling duct 40 of preferably be used for supplying with cooling fluid and being used for the backflow cooling fluid can all be arranged on the homonymy of housing 10, be communicated with respectively with import and the outlet of helical form pipeline 60, shown in Fig. 2 A and Fig. 2 B, Fig. 2 B shows the cooling liquid inlet of helical form pipeline 60 and the position of outlet.The outlet of fuel channel 20 and combustion-supporting gas channel 30 can be reserved in the middle part of helical form pipeline 60.Fuel channel 20 and cooling duct 40 are for roughly cylindric, and the cross section of combustion-supporting gas channel 30 is general toroidal.But the relative position relation in the practical application between fuel channel 20, combustion-supporting gas channel 30 and cooling duct 40 threes, the cross sectional shape of each passage and longitudinal axis shape are not limited to shown in Fig. 2 A and Fig. 2 B, can arrange each passage according to actual needs, can realize that the corresponding fluid of guiding flows to get final product.
The burner noz(zle) that present embodiment provides, form the helical form coolant flow channel by in cooling chamber, being embedded the helical form pipeline, make the helical form coolant flow channel be pipeline independently, needn't with the wall of nozzle body between form the knuckle type and be connected, so can eliminate because of the knuckle place temperature difference greatly, the cooling chamber cracking phenomena that causes of unbalanced stress.This technical scheme has been optimized the structure of burner noz(zle) cooling chamber, reduces probability of damage, has improved the reliability of burner noz(zle) work.
This enforcement preferably forms the ccontaining cavity of two cooling liquids respectively inside and outside the helical form pipeline.The cooling duct can with helical form pipeline and helical form pipeline outside cooling chamber be communicated with respectively, in the inside and outside ccontaining cavity coolant flow is arranged.She Ji advantage is like this, both guaranteed cooling fluid evenly flowing at spray nozzle front end by the helical form coolant flow channel, reach favorable cooling effect, provide guarantee by two-layer ccontaining cavity for the reliably working of nozzle again, inside and outside ccontaining cavity has been realized heat exchange by the helical form pipeline, temperature is roughly the same, even the helical form pipeline has breakage, also can not cause cooling fluid to leak influences burning to nozzle.Cooling chamber outside the spiral tube road constitutes the outer cooling of pipe system, has been equivalent to form the heat-resisting protective on nozzle outer cover surface.
The mode that helical form pipeline 60 is fixed in the cooling chamber 50 can have multiple, for example cooling chamber 50 is formed by nozzle body 10 front end walls and cover cap 70 fastenings in the present embodiment, can fasten by welding, then can helical form pipeline 60 buttons be established with cover cap 70 and be fixed in the cooling chamber 50.Perhaps also the helical form pipeline can be weldingly fixed on the wall of nozzle body end.Other fixed forms will be described in detail by following embodiment.
No matter adopt which kind of fixed form, because the helical form pipeline is body independently, so all can avoid being connected with the knuckle type of shell wall side, eliminated the problem of unbalanced stress.The shape of cross section of helical form pipeline is preferably circle or ellipse, and the pipeline of general cylindrical shape more effectively wall knuckle type connects.
The technical scheme of present embodiment also has production cost and the low advantage of maintenance cost.Be embedded the direct dismounting and change of independent spiral shape pipeline in cooling chamber, needn't reequip whole burner noz(zle), therefore need not the use of long-time burn-out nozzle.
Embodiment two
The structural representation of the burner noz(zle) that Fig. 3 A provides for the embodiment of the invention two, Fig. 3 B be among Fig. 3 A along the sectional structure schematic diagram of B-B line, Fig. 3 C is along the sectional structure schematic diagram of C-C line among Fig. 3 A.The difference of present embodiment and embodiment one is: the quantity of the cooling duct 40 that arranges in housing 10 is two, article one, be communicated with helical form pipeline 60, another cooling duct 40 is communicated with cooling chamber 50 outside the helical form pipeline 60, is provided with import and the outlet of two cooling ducts 40 respectively as Fig. 3 A, 3B and 3C.Comprise that separately the cooling duct 40 of supply and return flow line is separately positioned on the both sides of housing 10.
In the present embodiment, be separated into two helical form coolant flow channels by the helical form pipeline in the cooling chamber, and supplied with cooling fluid by a cooling duct independently of one another, can further strengthen cooling effect.
In concrete the application, it is two that the quantity of cooling duct is not limited to, and the quantity of cooling duct can be at least two, and wherein at least one cooling duct is communicated with the helical form pipeline, and another cooling duct is communicated with cooling chamber outside the helical form pipeline at least.The cooling fluid that a group or more all can be set on helical form pipeline and on the cooling chamber is imported and exported, in order to connect corresponding cooling duct.The quantity of helical form pipeline also is not limited to one, can be many helical form pipelines, connects a cooling duct, or connects many cooling ducts separately.
Embodiment three
The partial structurtes schematic diagram of the burner noz(zle) that Fig. 4 provides for the embodiment of the invention three, present embodiment can be based on above-mentioned each technical scheme, one or two end face at cooling chamber 50 is formed with groove 51, normally be formed on nozzle body 10 front end walls and the cover cap 70, the form fit of the shape of groove 51 and helical form pipeline is fastened the helical form pipeline in cooling chamber 50.
The mode of the fixedly helical form pipeline that present embodiment provides, can further reduce the helical form pipeline is connected with point-like or the wire of shell wall side, increase the contact area of helical form pipeline and housing, can improve the heat conduction cooling performance, can avoid again being rigidly connected and locate the stress inequality and damaged fracture.
In addition, pipeline forms coolant flow channel owing to adopt independently in above-mentioned each this enforcement, has in fact formed the ccontaining cavity of two cooling liquids inside and outside the helical form pipeline respectively.
In the various embodiments of the present invention, the helical form pipeline is preferably pipelines such as copper pipe, carbon steel pipe or stainless steel tube, perhaps also can be with the good material preparation of other heat conductivilitys, so that the heat-transfer effect between the inside and outside cooling fluid of enhancing helical form pipeline.
Embodiment four
The partial structurtes schematic diagram of the burner noz(zle) that Fig. 5 provides for the embodiment of the invention four, present embodiment can provide the scheme of another kind of fixedly helical form pipeline 60 based on above-mentioned each technical scheme.In the present embodiment, be formed with a plurality of pins 52 on one or two end face of cooling chamber 50, pin 52 can be approximately perpendicular to housing 10 end walls towards cooling chamber 50 inboard settings, and helical form pipeline 60 is wrapped between the pin 52 and fixes.
The technical scheme of present embodiment has been avoided directly being rigidly connected of helical form pipeline and shell wall side equally, can reduce damaged possibility thus, has also made things convenient for installation and removal.
Embodiment five
The partial structurtes schematic diagram of the burner noz(zle) that Fig. 6 provides for the embodiment of the invention five, more preferably in conjunction with the embodiments three and the technological means of embodiment four, be formed with a plurality of pins 52 at the end face of cooling chamber 50 towards the burner noz(zle) outside, pin 52 is towards cooling chamber 50 inboard settings, pin 52 generally is formed on the cover cap 70, and the helical form pipeline is wrapped between the pin 52 and fixes.Form groove 51 at the end face of cooling chamber 50 towards the burner noz(zle) inboard, can be formed on usually on the front end wall of nozzle body 10, the form fit of the shape of groove 51 and helical form pipeline is fastened the helical form pipeline in cooling chamber 50.
The easier processing and manufacturing of technique scheme, the burner noz(zle) cover cap can still be designed to tabular, inwardly welds pin and gets final product.
Embodiment six
The sectional structure schematic diagram of the burner noz(zle) that Fig. 7 provides for the embodiment of the invention six, present embodiment can further have been optimized the structure of cooling duct 40 based on above-mentioned each technical scheme.In the present embodiment, be formed with mozzle 80 in the cooling duct 40, mozzle 80 docks with helical form pipeline 60, i.e. airtight connection of the mouth of pipe on mozzle 80 and spiral tube road 60, and mozzle 80 and spiral tube road 60 outer cooling chambers 50 are not communicated with.
The technical scheme of present embodiment provides mozzle independently for the helical form pipeline, and mozzle directly provides cooling fluid to the helical form pipeline.Can be with or without cooling fluid in the cooling duct in the mozzle outside, can think that the outside of helical form pipeline provides or do not provide cooling fluid all can.
Embodiment seven
The sectional structure schematic diagram of the burner noz(zle) that Fig. 8 provides for the embodiment of the invention seven, present embodiment can be based on above-described embodiment six, and the shape of cross section of cooling duct 40 is annular, and mozzle 80 is spirally wound in the cooling duct 40.And preferably only being arranged on cooling duct 40 supplies with in the part passage of cooling fluid.
In above-described embodiment six, the cooling duct can be tubulose, only is arranged on a side of housing, and perhaps the cooling duct also can be the path of cross section ring-type, is looped around the outside of combustion-supporting gas channel.In the present embodiment seven, the cooling duct specifically is that shape of cross section is the path of ring-type, is looped around the outside of combustion-supporting gas channel, and shrouding ring can carry out sufficient heat exchange to the cooling fluid inside and outside the cooling chamber among the cooling duct.
The embodiment of the invention also provides a kind of coal gasifier, comprises the burner noz(zle) that any embodiment of the present invention provides.This coal gasifier forms the helical form coolant flow channel by be embedded the helical form pipeline in cooling chamber, make the helical form coolant flow channel be pipeline independently, needn't with the wall of nozzle body between form the knuckle type and be connected, so can eliminate because of the knuckle place temperature difference greatly, the cooling chamber cracking phenomena that causes of unbalanced stress.Technical scheme of the present invention has been optimized the structure of burner noz(zle) cooling chamber, reduces probability of damage, has improved the reliability of burner noz(zle) work.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (12)
1. burner noz(zle), comprise nozzle body, be provided with fuel channel, combustion-supporting gas channel and cooling duct in the described nozzle body, the nozzle body front end is provided with cooling chamber, it is characterized in that: be embedded with the helical form pipeline that is communicated with the cooling duct in the described cooling chamber, to form the helical form coolant flow channel;
Described cooling duct is communicated with respectively with cooling chamber outside described helical form pipeline and the helical form pipeline; Perhaps,
The quantity of described cooling duct is at least two, and wherein at least one cooling duct is communicated with described helical form pipeline, and another cooling duct is communicated with cooling chamber outside the described helical form pipeline at least;
Be formed with mozzle in the described cooling duct, described mozzle docks with described helical form pipeline.
2. burner noz(zle) according to claim 1 is characterized in that: the shape of cross section of described helical form pipeline is for circular or oval.
3. burner noz(zle) according to claim 1 is characterized in that: described cooling chamber is fastened by nozzle body front end wall and cover cap and is welded.
4. according to claim 1 or 2 or 3 described burner noz(zle)s, it is characterized in that: be formed with groove on one or two end face of described cooling chamber, the form fit of the shape of described groove and described helical form pipeline is fastened described helical form pipeline in cooling chamber.
5. according to claim 1 or 2 or 3 described burner noz(zle)s, it is characterized in that: be formed with a plurality of pins on one or two end face of described cooling chamber, described helical form pipeline is wrapped between the pin to be fixed.
6. according to claim 1 or 2 or 3 described burner noz(zle)s, it is characterized in that: described cooling chamber is formed with a plurality of pins on the end face in the burner noz(zle) outside, the helical form pipeline is wrapped between the pin to be fixed; Described cooling chamber forms groove on the end face of burner noz(zle) inboard, the form fit of the shape of described groove and described helical form pipeline is fastened described helical form pipeline in cooling chamber.
7. burner noz(zle) according to claim 1 is characterized in that: the shape of cross section of described cooling duct is annular, and described mozzle is spirally wound in the described cooling duct.
8. burner noz(zle) according to claim 7 is characterized in that: the described mozzle that spiral twines is arranged on described cooling duct and supplies with in the part passage of cooling fluid.
9. according to claim 1 or 2 or 3 described burner noz(zle)s, it is characterized in that: described helical form pipeline is copper pipe, carbon steel pipe or stainless steel tube.
10. according to claim 1 or 2 or 3 described burner noz(zle)s, it is characterized in that: described fuel channel arranges along longitudinal center's axis of described nozzle body, described combustion-supporting gas channel is looped around the outside of described fuel channel, and described cooling duct is arranged on the outside of described combustion-supporting gas channel.
11. burner noz(zle) according to claim 10 is characterized in that: the cooling duct that is used for supplying with cooling fluid and be used for the backflow cooling fluid all is arranged on the homonymy of described housing.
12. a coal gasifier is characterized in that, comprising: the arbitrary described burner noz(zle) of claim 1-11.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110199661 CN102287826B (en) | 2011-07-15 | 2011-07-15 | Combustion nozzle and coal gasification furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110199661 CN102287826B (en) | 2011-07-15 | 2011-07-15 | Combustion nozzle and coal gasification furnace |
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| CN102287826A CN102287826A (en) | 2011-12-21 |
| CN102287826B true CN102287826B (en) | 2013-09-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101371291B1 (en) * | 2012-05-04 | 2014-03-07 | 고등기술연구원연구조합 | Non-slagging and partial-slagging gasifier |
| CN103013574A (en) * | 2012-11-26 | 2013-04-03 | 清华大学 | Water-coal-slurry nozzle |
| CN112480966B (en) * | 2020-12-14 | 2022-03-08 | 陕西鑫立喷嘴研制开发有限公司 | Coal gasification process nozzle |
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Denomination of invention: Combustion nozzle and coal gasification furnace Effective date of registration: 20190729 Granted publication date: 20130911 Pledgee: China Co truction Bank Corp Ma'anshan branch Pledgor: KEDA INDUSTRIAL CO., LTD. Registration number: 2019340000426 |