CN108180478B - Gas burner and coal gas burner - Google Patents
Gas burner and coal gas burner Download PDFInfo
- Publication number
- CN108180478B CN108180478B CN201711455624.2A CN201711455624A CN108180478B CN 108180478 B CN108180478 B CN 108180478B CN 201711455624 A CN201711455624 A CN 201711455624A CN 108180478 B CN108180478 B CN 108180478B
- Authority
- CN
- China
- Prior art keywords
- gas
- burner
- ignitor
- spout
- coal
- 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.)
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- 239000003034 coal gas Substances 0.000 title claims abstract description 63
- 239000007789 gas Substances 0.000 claims abstract description 80
- 239000000567 combustion gas Substances 0.000 claims abstract description 57
- 230000002776 aggregation Effects 0.000 claims description 19
- 238000004220 aggregation Methods 0.000 claims description 19
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 239000003245 coal Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 abstract description 13
- 238000002347 injection Methods 0.000 abstract description 12
- 239000007924 injection Substances 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
-
- 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
Abstract
A kind of gas burner and coal gas burner, belong to gas-fired apparatus field.The first combustion gas spout, the mounting base on the gas paths that the first combustion gas spout sprays and the ignitor for lighting a fire to coal gas, the ignitor that the gas burner includes burner body, connect with burner body connect with mounting base and can rotate relative to mounting base.Gas burner provided by the invention can adjust the orientation of ignitor, in order to adapt to the gas injection path of different injection flows and angle.The present invention also provides a kind of coal gas burners comprising above-mentioned gas burner.
Description
Technical field
The present invention relates to waste gas pollution control and treatment fields, fire in particular to a kind of coal gas using blast furnace gas direct-fire
Burner and coal gas burner.
Background technique
Blast furnace gas largely more than needed can be produced in the steel industry, at present for the main utilization of these blast furnace gases
Mode be for generating electricity, but since the calorific value of blast furnace gas is very low, only 700~800kcal/Nm3, it is roughly equal to 3000~
3400KJ/Nm3, about 700 DEG C of ignition temperature.The main fuel of gas boiler is generally blast furnace gas, and traditional sparking mode is
Using coal gas of converter or coke-stove gas, also there is the combustion higher using calorific values such as natural gas, liquefied petroleum gas, ignition point is relatively low
Material is used as pilot fuel, and such ignition method usually needs that the position of ignitor is adjusted to adapt to different fuel streams
Amount and part special circumstances, but existing coal gas burner mostly can not achieve this function at present.
Therefore, it is necessary to one kind can adjust the coal gas burner in ignitor orientation freely with meet demand.
Summary of the invention
The purpose of the present invention is to provide a kind of gas burners, can adjust the orientation of ignitor, in order to suitable
Answer the gas injection path of different injection flows and angle.
Another object of the present invention is to provide a kind of coal gas burners, can adapt to different spray angles and injection
The gas paths of flow light demand.
The embodiment of the present invention is achieved in that
A kind of gas burner comprising burner body, the first combustion gas spout being connect with burner body, mounting base
And the ignitor that coal gas is lighted a fire on the gas paths for spraying to the first combustion gas spout, ignitor and mounting base connect
It connects and can be rotated relative to mounting base.
In preferred embodiments of the present invention, above-mentioned mounting base is equipped with the sphere of ball groove and rotation in ball groove, igniting
Sphere is run through in one end of electrode.
In preferred embodiments of the present invention, it is opposite for drive ignition electrode that above-mentioned ignitor is connected at least one
The runner assembly of mounting base rotation.
In preferred embodiments of the present invention, above-mentioned mounting base is connected with the movement for driving it linearly to move
Component.
In preferred embodiments of the present invention, coal gas aggregation bucket, coal gas aggregation bucket are arranged on above-mentioned first combustion gas spout
Internal diameter be gradually reduced with far from the first combustion gas spout.
In preferred embodiments of the present invention, above-mentioned coal gas aggregation bucket is externally provided at least one can be in the first plane internal rotation
The second combustion gas spout, gas paths are located in the first plane.
In preferred embodiments of the present invention, above-mentioned each second combustion gas spout is connected separately with for driving it first
The rotary components of plane internal rotation.
In preferred embodiments of the present invention, at least one burner port is offered on above-mentioned coal gas aggregation bucket.
In preferred embodiments of the present invention, the aperture of above-mentioned burner port is gradually increased with far from the first combustion gas spout.
The present invention also provides a kind of coal gas burners comprising above-mentioned gas burner and for gas-fired
The gas conveying tube of device offer coal gas.
The beneficial effect of the embodiment of the present invention is: gas burner provided in an embodiment of the present invention include burner body,
It the first combustion gas spout for being connect with burner body, the mounting base on the gas paths that the first combustion gas spout sprays and is used for
To the ignitor that coal gas is lighted a fire, ignitor connect with mounting base and can rotate relative to mounting base.It is provided by the invention
Gas burner can adjust the orientation of ignitor, in order to adapt to the gas injection path of different injection flows and angle.
The present invention also provides a kind of coal gas burners comprising above-mentioned gas burner, can adapt to different spray angles and spray
The gas paths of amount of jet light demand.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram for the gas burner that the embodiment of the present invention 1 provides；
Fig. 2 is the structural schematic diagram for the coal gas burner that the embodiment of the present invention 2 provides；
Fig. 3 is the structural schematic diagram for the coal gas burner that the embodiment of the present invention 3 provides；
Fig. 4 is the structural schematic diagram for the coal gas burner that the embodiment of the present invention 4 provides.
In figure: 001- gas burner；002- gas burner；003- gas burner；004- gas burner；100-
Burner body；101- ignitor；110- the first combustion gas spout；120- mounting base；121- ball groove；122- sphere；123- drives
Lever；The first electric pushrod of 124-；125- intermediate bar；The second electric pushrod of 126-；130- drive disk；140- coal gas aggregation bucket；
141- burner port；150- the second combustion gas spout；160- fixing seat；161- fixes ball groove；162- fixes sphere；163- gas transmission branch
Pipe；164- third electric pushrod；210- gas transmission supervisor；220- gas-off valve.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Embodiment 1
It please refers to shown in Fig. 1, the present embodiment provides a kind of gas burners 001 comprising burner body 100 and combustion
The first combustion gas spout 110, mounting base 120 and the coal gas road for being sprayed to the first combustion gas spout 110 that burner ontology 100 connects
The ignitor 101 that coal gas on diameter is lighted a fire, ignitor 101 connect with mounting base 120 and can opposite 120 turns of mounting bases
Dynamic, mounting base 120 is equipped with the sphere 122 of ball groove 121 and rotation in ball groove 121, and sphere is run through in one end of ignitor 101
122.In the present embodiment, ignitor 101 and the first combustion gas spout 110 are positioned opposite.
Gas burner 001 provided in this embodiment can adjust the rotation angle of ignitor 101, in order to first
The coal gas for the different flow that combustion gas spout 110 sprays is lighted, to avoid there is being difficult to a coal gas.User can
To push ignitor 101 by driving device, make ignitor 101 as its perforative sphere 122 is along 121 turns of ball groove
It is dynamic, so that the relative angle of ignitor 101 Yu mounting base 120 is adjusted, in order to make ignitor 101 adapt to the first gas injection
The gas paths variation of mouthfuls 110 different flows sprayed is lighted a fire, avoid the first combustion gas spout 110 spray gas flow compared with
The ignitor 101 of fixed and arranged can not put coal gas behind change injection track after small or the first combustion gas spout 110 is hit,
The effective use reliability for improving gas burner 001.
Drive disk 130 is arranged on ignitor 101, drive disk 130 is connected at least one for drive ignition electrode
101 runner assemblies rotated relative to mounting base 120.In the present embodiment, drive disk connection is there are four runner assembly, and runner assembly
For first electric pushrod 124 hinged by intermediate bar 125 with drive disk 130.Pass through what is connect with 130 surrounding edge of drive disk
Four the first electric pushrods 124 can be fast automatic promotion drive disk 130 it is mobile to four direction, to push ignitor
101 drive sphere 122 to rotate in ball groove 121 to four direction, to realize that four directions rotate ignitor 101 automatically to adapt to
The function of the coal gas for the different flow that first combustion gas spout 110 sprays；Certainly, in a further embodiment, drive can also be removed
First electric pushrod 124 is directly connect by Moving plate 130 with the end of ignitor 101, directly using the first electric pushrod 124
Drive ignition electrode 101 rotates, while in a further embodiment, and hydraulic cylinder, cylinder, turbine and worm can also be used to fill
Set, gear rack arrangement or other it is any can linearly push the device of drive disk 130 replace the present embodiment use
First electric pushrod 124 is used as runner assembly.
Mounting base 120 is connected with the moving assembly for driving it linearly to move, the mounting base in the present embodiment
120 are connected with drive rod 123, and drive rod 123 is connected with the second electric pushrod for driving it to move along gas paths direction
126.120 edge of mounting base that user can drive drive rod 123 by the second electric pushrod 126 and connect with drive rod 123
Gas paths direction moves back and forth, thus adjust the ignitor 101 that is connect with mounting base 120 along gas paths direction move with
The distance of ignitor 101 and the first combustion gas spout 110 is adjusted, in order to use ignitor 101 to the first combustion gas spout 110
The coal gas of ejection is lighted.
Embodiment 2
Shown in referring to figure 2., the present embodiment provides a kind of gas burner 002, the gas-fired provided with embodiment 1
The difference of device 001 is that ignitor 101 is set to the side of the first combustion gas spout 110, and the second electric pushrod in the present embodiment
126 drive installation seats 120 are moved along perpendicular to gas paths direction, and gas burner 002 provided in this embodiment is by ignition power
The side that pole 101 is set to the first combustion gas spout 110 can be avoided ignitor 101 and mounting base 120 stops the first combustion gas spout
110 coal gas sprayed to improve efficiency of combustion, and still are able to adjust ignitor by four the first electric pushrods 124
101 angle orientation.
Embodiment 3
Shown in referring to figure 3., the present embodiment provides a kind of coal gas burners comprising gas burner 003 and is used for
The gas conveying tube of coal gas is provided to gas burner 003；Wherein, gas burner 002 includes burner body 100 and combustion
The first combustion gas spout 110, mounting base 120 and the coal gas road for being sprayed to the first combustion gas spout 110 that burner ontology 100 connects
The ignitor 101 that coal gas on diameter is lighted a fire, ignitor 101 connect with mounting base 120 and can opposite 120 turns of mounting bases
Dynamic, mounting base 120 is equipped with the sphere 122 of ball groove 121 and rotation in ball groove 121, and sphere is run through in one end of ignitor 101
122, it is arranged with drive disk 130 on ignitor 101, there are four pacify for drive ignition electrode 101 to be opposite for the connection of drive disk 130
Fill the first electric pushrod 124 that seat 120 rotates.
Coal gas burner provided in this embodiment is arranged with coal gas aggregation bucket 140, coal gas on the first combustion gas spout 110
The internal diameter of aggregation bucket 140 is gradually reduced with far from the first combustion gas spout 110.Internal diameter is arranged on the first combustion gas spout 110
The coal gas aggregation bucket 140 being gradually reduced, the coal gas that the first combustion gas spout 110 can be made to spray is ignited electrode 101 and lights rear quilt
Coal gas aggregation bucket 140 is gathered together and is sprayed by the lesser one end of internal diameter, so that the intensity of flame is effectively improved,
Improve the efficiency of combustion of coal gas burner.
There are four can be in the second combustion gas spout 150 of the first plane internal rotation, gas paths position for coal gas aggregation 140 peripheral hardwares of bucket
In in the first plane.Coal gas aggregation bucket 140 is externally provided in its four fixing seat 160 circumferentially, each fixing seat 160
The fixation sphere 162 in fixed ball groove 161, the second combustion gas spout 150 and fixed sphere are set to equipped with fixed ball groove 161 and rotation
162 connections, fixed sphere 162 are connected with the gas transmission branch pipe 163 being connected to the second combustion gas spout 150, each second combustion gas spout
150 are connected separately with the rotary components for driving it in the first plane internal rotation, and in the present embodiment, rotary components are and second
The third electric pushrod 164 that combustion gas spout 150 connects.By the way that four the second gas injections are arranged in the outside of coal gas aggregation bucket 140
Mouthfuls 150 can be additional after the gas-fired that the first combustion gas spout 110 sprays four gas ports of offer to provide four volumes
Outer gas burner, and user can drive the second combustion gas spout 150 to revolve along the first plane by third electric pushrod 164
Turn, so that the handover angle of coal gas and the gas paths being located in the first plane that the second combustion gas spout 150 sprays is adjusted, to adjust
The angle of the flame of the second combustion gas spout 150 ejection is saved, is specifically logical to realize the function of adjusting five gas burner angles
It crosses third electric pushrod 164 and pushes the second combustion gas spout 150, make the second combustion gas spout 150 and fixed sphere 162 along fixed ball groove
161 rotations, thus function of the second combustion gas spout 150 of driving in the first plane internal rotation；It in a further embodiment, can be with
Using hydraulic cylinder, cylinder, turbine and worm device, gear rack arrangement or other any can linearly push the second combustion gas
The device of spout 150 uses to replace the third electric pushrod 164 of the present embodiment use as rotary components.
Ten burner ports 141 are offered on coal gas aggregation bucket 140, the aperture of burner port 141 is with far from the first gas injection
Mouth 110 is gradually increased.The burner port 141 opened up on coal gas aggregation bucket 140 can be in the first combustion gas spout 110 and the second gas injection
Ten combustion flames are further provided on the basis of five combustion flames that mouth 150 provides, to provide more for user
Combustion path, furthermore the aperture of burner port 141 is gradually increased with far from the first combustion gas spout 110 and can be improved combustion flame
Size, help improve fuel efficiency.
In coal gas burner provided in this embodiment, the gas conveying tube for providing coal gas to gas burner includes
The gas transmission branch pipe that the gas transmission being connected to the first combustion gas spout 110 is responsible for 210 and is connected to respectively with four the second combustion gas spouts 150
163, gas transmission is responsible on 210 and gas transmission branch pipe 163 and is respectively arranged with gas-off valve 220, and user can pass through gas switch
Valve 220 controls the coal gas and its uninterrupted for being delivered to the first combustion gas spout 110 and the second combustion gas spout 150, in order to control
The combustion flame of coal gas burner.
Embodiment 4
Shown in referring to figure 4., the present embodiment provides a kind of coal gas burner, the gas-fired provided with embodiment 3
The difference of device 003 is that the not set coal gas of gas burner 004 in the present embodiment assembles bucket 140, coal provided in this embodiment
Air burner 004 is not provided with coal gas aggregation bucket 140, and the flame that the first combustion gas spout 110 can be facilitated to spray fires four second
The coal gas that gas blowout mouth 150 sprays is lighted, and is facilitated convenient for users to the burning of five flames of adjusting in order to be heated.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of gas burner, which is characterized in that its first combustion for including burner body, being connect with the burner body
The ignitor that coal gas is lighted a fire on gas blowout mouth, mounting base and gas paths for spraying to the first combustion gas spout,
The ignitor connect with the mounting base and can rotate relative to the mounting base, is arranged with coal on the first combustion gas spout
Gas aggregation bucket, the internal diameter that the coal gas aggregation struggles against are gradually reduced with the separate first combustion gas spout, the coal gas aggregation bucket
First plane can be located in the second combustion gas spout of the first plane internal rotation, the gas paths by being externally provided at least one
On, each second combustion gas spout is connected separately with the rotary components for driving it in first plane internal rotation；
At least one burner port is offered on the coal gas aggregation bucket；The aperture of the burner port is with far from first combustion gas
Spout is gradually increased.
2. gas burner according to claim 1, which is characterized in that the mounting base is equipped with ball groove and rotation is set to institute
The sphere in ball groove is stated, the sphere is run through in one end of the ignitor.
3. gas burner according to claim 2, which is characterized in that the ignitor is connected at least one and is used for
The runner assembly for driving the ignitor to rotate relative to the mounting base.
4. gas burner according to claim 1, which is characterized in that the mounting base is connected with for driving it along straight
The mobile moving assembly in line direction.
5. a kind of coal gas burner, which is characterized in that it includes such as gas burner of any of claims 1-4
And for providing the gas conveying tube of coal gas to the gas burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455624.2A CN108180478B (en) | 2017-12-28 | 2017-12-28 | Gas burner and coal gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455624.2A CN108180478B (en) | 2017-12-28 | 2017-12-28 | Gas burner and coal gas burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108180478A CN108180478A (en) | 2018-06-19 |
| CN108180478B true CN108180478B (en) | 2019-11-19 |
Family
ID=62548245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711455624.2A Active CN108180478B (en) | 2017-12-28 | 2017-12-28 | Gas burner and coal gas burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108180478B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86204051U (en) * | 1986-09-01 | 1987-07-29 | 上海市公用事业研究所 | Gas radiant-tube with promoted igniter |
| CN202813367U (en) * | 2012-09-10 | 2013-03-20 | 中国石油化工股份有限公司 | Stable-flame low-nitrogen oxide (NOx) bottom burner for cracking furnace |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6050809A (en) * | 1997-09-23 | 2000-04-18 | Eclipse Combustion, Inc. | Immersion tube burner with improved flame stability |
| CN2861762Y (en) * | 2005-07-22 | 2007-01-24 | 徐剑光 | Whirling flame burner for domestic gas range |
| CN100427826C (en) * | 2006-11-16 | 2008-10-22 | 武汉钢铁(集团)公司 | Adjusting device for burner with separated air channel and fuel channel |
-
2017
- 2017-12-28 CN CN201711455624.2A patent/CN108180478B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86204051U (en) * | 1986-09-01 | 1987-07-29 | 上海市公用事业研究所 | Gas radiant-tube with promoted igniter |
| CN202813367U (en) * | 2012-09-10 | 2013-03-20 | 中国石油化工股份有限公司 | Stable-flame low-nitrogen oxide (NOx) bottom burner for cracking furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108180478A (en) | 2018-06-19 |
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