CN104764008A - Novel combustor and Al2O3 coating treating method of main part of combustor - Google Patents

Novel combustor and Al2O3 coating treating method of main part of combustor Download PDF

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Publication number
CN104764008A
CN104764008A CN201510133770.8A CN201510133770A CN104764008A CN 104764008 A CN104764008 A CN 104764008A CN 201510133770 A CN201510133770 A CN 201510133770A CN 104764008 A CN104764008 A CN 104764008A
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China
Prior art keywords
cylinder
circular plate
primary air
pipe
sharing
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Granted
Application number
CN201510133770.8A
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Chinese (zh)
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CN104764008B (en
Inventor
贾贵西
田丽萍
常云朋
杨海军
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Luoyang Institute of Science and Technology
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Luoyang Institute of Science and Technology
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Priority to CN201510133770.8A priority Critical patent/CN104764008B/en
Publication of CN104764008A publication Critical patent/CN104764008A/en
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Publication of CN104764008B publication Critical patent/CN104764008B/en
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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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • 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

The invention relates to a novel combustor and an Al2O3 coating treating method of a main part of the combustor. The combustor comprises a gas pipeline (A), a primary air uniform-flowing barrel (B), a primary air inlet (C), a secondary air adjusting barrel (D) and a secondary air inlet (E). The method comprises the steps of removing oil; rinsing through deionized water; plating aluminum on the surface of the part by the hot dipping technology; preparing an aqueous electrolyte solution; placing the main part as an anode into the aqueous electrolyte solution; electroplating through a micro-arc oxidation device; preparing for 150 to 180 minutes to obtain an Al2O3 coating being 200 to 300 microns in thickness. According to the technical scheme, the method has the characteristics that the production efficiency is greatly increased, the product quality is improved, the energy can be saved, the cost can be saved, the environmental pollution can be reduced, the service life is long, and the repair is convenient.

Description

A kind of novel burner and critical piece Al thereof 2o 3coating Processes
Technical field
The present invention relates to a kind of burner, particularly relate to a kind of novel burner and critical piece Al thereof 2o 3coating Processes.
Background technology
Along with the attention to steel products quality and cost, requirements at the higher level are proposed to the baking temperature of (hereinafter referred to as ladles) such as ladle, pans, iron bags and energy consumption.To require on the one hand ladle baking to higher temperature and homogeneous temperature, the baking time of ladle will be shortened on the other hand, reduce energy consumption, minimizing environmental pollution, even can use low-calorie fuel.And burner is as the core component heated ladle, most important to baking quality, the saving energy consumption improving ladle.
This patent is " novel based on Al 2o 3the burner of coating " be general principle according to the conservation of energy; by gaseous-pressure can a part be converted into the kinetic force (for its burning provides sufficient oxygen) sucking air; and apply up-to-date surface engineering technology; in conjunction with the application practical working situation of ladle baking facility and metallurgical equipment; application machine Optimization Theory, and creationaryly by means of finite element simulation sunykatuib analysis to develop.
The unique texture of this product and operation principle thereof, it improves the length, dynamics etc. of flame combustion, it can replace various blower fan and the associated components thereof of old-fashioned ladle baking facility and metallurgical equipment, realize object that is energy-conservation, that reduce costs, also make it toast project organization is compact, installation and maintenance are convenient simultaneously.
Summary of the invention
The object of the invention is to, overcome the defect that existing burner exists, and a kind of novel burner is provided, technical problem to be solved makes it enhance productivity, and improves the quality of products, economize energy, cost-saving, reduce environmental pollution, the life-span is long and easy to maintenance.
The present invention also aims to, overcome the defect that existing burner exists, and a kind of critical piece Al of novel burner is provided 2o 3coating Processes, technical problem to be solved produces to have high temperature resistant, resistance to oxidation, athermanous Al 2o 3the burner of ceramic layer, improves the performance of burner.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of novel burner that the present invention proposes, comprising: gas pipeline (A), primary air current-sharing cylinder (B), primary air entrance (C), secondary air registers cylinder (D) and auxiliary air entrance (E);
Wherein said gas pipeline (A) part is sheathed in primary air current-sharing cylinder (B), and primary air current-sharing cylinder (B) part is sheathed in secondary air registers cylinder (D); Primary air entrance (C) is positioned at primary air current-sharing cylinder (B) top, and primary air entrance (C) is fixedly connected with primary air current-sharing cylinder (B) upper end and is connected; Auxiliary air entrance (E) is arranged at secondary air registers cylinder (D) upper side, and auxiliary air entrance (E) is connected with secondary air registers cylinder (D).
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid novel burner, wherein said gas pipeline (A), primary air current-sharing cylinder (B) all coincide with same axis with the axis of secondary air registers cylinder (D); The diameter (d1) of described gas pipeline (A) is less than the diameter (d2) of primary air current-sharing cylinder (B), and the diameter (d2) of primary air current-sharing cylinder (B) is less than the diameter (d3) of secondary air registers cylinder (D).
Aforesaid novel burner, wherein said gas pipeline (A) comprises flange (11), cylinder (10) and the reduced pipe (14) of order from top to bottom, cylinder (10) upper end is connected with flange (11), cylinder (10) lower end is fixedly connected with reduced pipe (14), and it is inner that described reduced pipe (14) is positioned at primary air current-sharing cylinder (B).
Aforesaid novel burner, wherein said primary air entrance (C) comprises Circular Plate (7), circular hole slab (8) and Circular Plate (9); Described Circular Plate (7), circular hole slab (8) are identical with the maximum gauge of Circular Plate (9); The annular diameters of described Circular Plate (9) is less than the annular diameters of Circular Plate (7), and being located on gas pipeline (A) outside, Circular Plate (7) and the outer end of Circular Plate (9) are fixedly connected with circular hole slab (8) two ends up and down respectively simultaneously; Described Circular Plate (7) inner ring surface is fixedly connected with the upper end of primary air current-sharing cylinder (B), and Circular Plate (9) is fixedly connected on the lateral surface of gas pipeline (A).
Aforesaid novel burner, wherein said secondary air registers cylinder (D) comprises reduced pipe (1), cylinder (2), connected positioning plate (3), cylinder (6), pipe (13) and Circular Plate (12); Wherein pipe (13) is positioned at outside cylinder (6) upper end, and connected positioning plate (3) is positioned at outside cylinder (2) middle and lower part; Circular Plate (12) is positioned at cylinder (6) and pipe (13) top, the outer annular diameter of Circular Plate (12) is identical with the outer annular diameter of pipe (13), and the annular diameters of Circular Plate (12) is less than the annular diameters of pipe (13); Circular Plate (12) and pipe (13) are tightly connected, and Circular Plate (12) inner ring surface is fixedly connected on the upper outside of primary air current-sharing cylinder (B).
Aforesaid novel burner, the deflection angle of wherein said reduced pipe (1) is 25 °.
Aforesaid novel burner, wherein said auxiliary air entrance (E) comprises flange (4) and steel pipe (5), wherein steel pipe (5) one end is communicated with secondary air registers cylinder (D), and steel pipe (5) other end is fixedly connected with flange (4).
Aforesaid novel burner, wherein said gas pipeline (A), primary air current-sharing cylinder (B), reduced pipe (1), cylinder (2), reduced pipe (14) are stainless steels.
Aforesaid novel burner, the distance (d4) between the M face of wherein said reduced pipe (14) and the N face of primary air current-sharing cylinder (B) is 2 times of the diameter (d1) of described gas pipeline (A); Distance (d5) between the center line of described flange (4) and the N face of primary air current-sharing cylinder (B) is about 1.5 times of the diameter (d3) of described secondary air registers cylinder (D); Distance (L1) between the lower surface of the distance (L3) between the bottom surface of described flange (11) and the upper surface of Circular Plate (9) and described Circular Plate (7) and the upper surface of Circular Plate (12) equal, and also equal with the distance (L2) between the upper surface of described Circular Plate (7) and the upper surface of Circular Plate (9).
The object of the invention to solve the technical problems also realizes by the following technical solutions.The critical piece Al of a kind of burner novel as elucidated before proposed according to the present invention 2o 3coating Processes, this critical piece is described cylinder and described reduced pipe, comprising following steps: the first step, carries out oil removal treatment to described critical piece to be coated; Second step, carries out rinsed with deionized water to described critical piece surface to be coated; 3rd step, utilize hot dipping technology of crossing to aluminize on described critical piece surface to be coated, thickness is about 100 ~ 150 μm; 4th step, solute ions chooses the Na of 0.1mol/L 2siO 3the electrolyte aqueous solution of differential arc oxidation is mixed with deionized water; 5th step, prepares described critical piece to be coated using above-mentioned 3rd step and is positioned in described electrolyte aqueous solution as anode; 6th step, carries out electrolysis to above-mentioned electrolyte aqueous solution: adopt micro-arc oxidation device power supply to be 65kW; Adopt constant current mode, current density 5A/dm2, frequency 400Hz, dutycycle 10, the temperature of described electrolyte aqueous solution controls at 30 DEG C; 7th step, control preparation time is 150 ~ 180min, obtains the described Al that thickness is 200 ~ 300 μm after preparation 2o 3coating.
By technique scheme, the present invention at least has following advantages:
1, superior performance
(1) fuel economy is high: complete combustion of fuel, heat utilization ratio are high, burning quality good.
(2) flame quality is good: combustion flame is long, concentration class is high and strong.
(3) energy-conservation: fuel uses few; Can work under Blower-free or little blower fan condition.
(4) efficiency is toasted high: fast to the rate of heat addition of ladle, efficiency is high.
(5) baking quality is high: roasting bag temperature is high, even.
2, the long-life
Under high temperature resistant, oxidation-resistant coating effect, this novel burner is made to have the long-life.
3, compact overall structure, outward appearance U.S..
In a word, burner of the present invention, compared with existing commercially main product, greatly can be enhanced productivity, improve the quality of products, economize energy, cost-saving, reduces environmental pollution, and product has long-life, the feature such as easy to maintenance in addition.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of description, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the floor map of burner structure of the present invention.
[main element symbol description]
A: gas pipeline
B: primary air current-sharing cylinder C: primary air entrance
D: secondary air registers cylinder E: auxiliary air entrance
1: reduced pipe 2: cylinder
3: connected positioning plate 4: flange
5: steel pipe 6: cylinder
7: Circular Plate 8: circular hole slab
9: Circular Plate 10: cylinder
11: flange 12: Circular Plate
13: pipe 14: reduced pipe
15: cylinder
Detailed description of the invention
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to a kind of novel its detailed description of the invention of burner, structure, feature, its critical piece Al that propose according to the present invention 2o 3coating Processes and effect thereof, be described in detail as follows.
One, the design feature of burner of the present invention, operation principle and technical key point
The object of the invention is the roasting bag burner designing a kind of new and effective, high-quality, energy-saving and environmental protection.The technical scheme that the present invention takes: one, the high-pressure gas (blast furnace gas, coal gas of converter, natural gas etc.) utilizing manufacturer to provide, can by air intake burner in air, for fuel combustion is supplied to sufficient oxygen, make this burner can realize burning under the condition of Blower-free or little blower fan.They are two, Al years old 2o 3pottery functional coating: this has high temperature resistant, resistance to oxidation and the features such as not heat conduction; And this coating also greatly improves the fineness of piece surface, reduce the resistance of gas flowing, make by pipeline gas flow rate everywhere basically identical, corresponding length, concentration class and the dynamics etc. that improve flame.Thus, this burner can improve roasting bag efficiency, roasting bag quality, realizes advantages such as economizing on resources, reduce costs; And this product also has compact conformation, long service life, the feature such as elegant in appearance, easy to maintenance.
Fig. 1 is the floor map of burner structure of the present invention.
The operation principle flow process of burner of the present invention is as follows shown in composition graphs 1:
1. the high-pressure gas (>=5kPa) that user provides is connected with flange 11, successively flows through cylinder 10 successively, enters in cylinder 15 after reduced pipe 14 accelerates.
2. the high-voltage high-speed combustion gas after accelerating is when flowing through stainless steel tube 15, air in cylinder 15 will be taken away, make to form parital vacuum in cylinder 15, impel it to be sucked by air (outside air enters this chamber through circular hole slab 8) in the toroidal cavity be made up of Circular Plate 7, circular hole slab 8 and Circular Plate 9.
3. in the above the 1. step and the 2. under step effect, combustion gas and air form air-gas mixture at cylinder 15 port of export, this mixture is at a high speed ejection after reduced pipe 1 accelerates, and the air simultaneously 4. walking suction with the mixes again, and final ignition combustion Baking out equipment.
4. in ejection while ignition combustion baking at a high speed after the 3. step, also take away air in stainless steel tube 2 to flow out at a high speed, make to form vacuum in cylinder 2, impel it to suck air in air through cylinder 6, steel pipe 5, flange 4, and again mix with the blast furnace gas-air mixture 3. walking outflow.
5. the difference of based on fuel (pressure and combustion heat value), can access little blower fan at flange 4, ensures that fuel is completely and oxygen-excess combustion, with realize energy-conservation, subtract dirty object.
The key technology main points of the burner manufacture that the present invention is novel:
1. the distance between the M face of reduced pipe 14 and the N face of cylinder 15 is that (5kPa pressure, combustion value are 3500KJ/Nm for about 2 times of cylinder 10 diameter 3blast furnace gas), make pressure difference can suitably regulate its distance, or adjustment cylinder 15 diameter.
2. the distance between the M face of reduced pipe 14 and Circular Plate 7 is that (5kPa pressure, combustion value are 3500KJ/Nm for about 2 times of the diameter d 1 (cylinder 10 diameter) of gas pipeline A 3blast furnace gas), make pressure difference can suitably regulate its distance.
3. the circulation area of combustion gas is approximately (5kPa pressure, blast furnace gas) about the half of primary air current-sharing cylinder B circulation area, and pressure difference can suitably be regulated.
4. the end diameter of reduced pipe 1 is consistent with the diameter of cylinder 15, and large end face is concordant with the N face of cylinder 15.
5. the streamlined structure of reduced pipe 1 and reduced pipe 14, can to the acceleration of gas conflux.
6. reduced pipe 1, cylinder 2, cylinder 10, reduced pipe 14 and cylinder 15 carries out surface A l 2o 3(concrete manufacture craft refers to following " Al in coating process 2o 3coating process ").
Two, Al 2o 3coating process
Application differential arc oxidization technique prepares at the piece surface of burner key position and high-temperature region that one deck is high temperature resistant, resistance to oxidation, athermanous Al 2o 3ceramic layer.Concrete manufacture craft is as follows:
1. treat coating component surface and carry out oil removal treatment, during oil removing, use common cleanser oil removing.
2. treat coating component surface and carry out rinsed with deionized water.
3. utilize hot dipping technology of crossing to aluminize at piece surface to be coated, thickness is about 100 ~ 150 μm.
4. solute ions chooses the Na of 0.1mol/L 2siO 3the electrolyte of differential arc oxidation is mixed with deionized water.
5. 3. technique is prepared band coating part to be positioned in electrolyte aqueous solution as anode.
6. micro-arc oxidation device power supply is adopted to be 65kW; Adopt constant current mode, current density 5A/dm2, frequency 400Hz, dutycycle 10, electrolyte temperature controls at about 30 DEG C.
7. preparation time about 150 ~ 180min, thickness is about 200 ~ 300 μm.
In sum, burner of the present invention, compared with existing commercially main product, greatly can be enhanced productivity, improve the quality of products, economize energy, cost-saving, reduces environmental pollution, and product of the present invention has long-life, the feature such as easy to maintenance in addition.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (10)

1. a novel burner, is characterized in that comprising: gas pipeline (A), primary air current-sharing cylinder (B), primary air entrance (C), secondary air registers cylinder (D) and auxiliary air entrance (E);
Wherein said gas pipeline (A) part is sheathed in primary air current-sharing cylinder (B), and primary air current-sharing cylinder (B) part is sheathed in secondary air registers cylinder (D);
Primary air entrance (C) is positioned at primary air current-sharing cylinder (B) top, and primary air entrance (C) is fixedly connected with primary air current-sharing cylinder (B) upper end and is connected;
Auxiliary air entrance (E) is arranged at secondary air registers cylinder (D) upper side, and auxiliary air entrance (E) is connected with secondary air registers cylinder (D).
2. novel burner according to claim 1, is characterized in that:
Described gas pipeline (A), primary air current-sharing cylinder (B) all coincide with same axis with the axis of secondary air registers cylinder (D);
The diameter (d1) of described gas pipeline (A) is less than the diameter (d2) of primary air current-sharing cylinder (B), and the diameter (d2) of primary air current-sharing cylinder (B) is less than the diameter (d3) of secondary air registers cylinder (D).
3. novel burner according to claim 2, it is characterized in that: described gas pipeline (A) comprises flange (11), cylinder (10) and the reduced pipe (14) of order from top to bottom, cylinder (10) upper end is connected with flange (11), cylinder (10) lower end is fixedly connected with reduced pipe (14), and it is inner that described reduced pipe (14) is positioned at primary air current-sharing cylinder (B).
4. novel burner according to claim 2, is characterized in that: described primary air entrance (C) comprises Circular Plate (7), circular hole slab (8) and Circular Plate (9);
Described Circular Plate (7), circular hole slab (8) are identical with the maximum gauge of Circular Plate (9);
The annular diameters of described Circular Plate (9) is less than the annular diameters of Circular Plate (7), and being located on gas pipeline (A) outside, Circular Plate (7) and the outer end of Circular Plate (9) are fixedly connected with circular hole slab (8) two ends up and down respectively simultaneously;
Described Circular Plate (7) inner ring surface is fixedly connected with the upper end of primary air current-sharing cylinder (B), and Circular Plate (9) is fixedly connected on the lateral surface of gas pipeline (A).
5. novel burner according to claim 2, is characterized in that: described secondary air registers cylinder (D) comprises reduced pipe (1), cylinder (2), connected positioning plate (3), cylinder (6), pipe (13) and Circular Plate (12);
Wherein pipe (13) is positioned at outside cylinder (6) upper end, and connected positioning plate (3) is positioned at outside cylinder (2) middle and lower part;
Circular Plate (12) is positioned at cylinder (6) and pipe (13) top, the outer annular diameter of Circular Plate (12) is identical with the outer annular diameter of pipe (13), and the annular diameters of Circular Plate (12) is less than the annular diameters of pipe (13);
Circular Plate (12) and pipe (13) are tightly connected, and Circular Plate (12) inner ring surface is fixedly connected on the upper outside of primary air current-sharing cylinder (B).
6. novel burner according to claim 5, is characterized in that: the deflection angle of described reduced pipe (1) is 25 °.
7. novel burner according to claim 2, it is characterized in that: described auxiliary air entrance (E) comprises flange (4) and steel pipe (5), wherein steel pipe (5) one end is communicated with secondary air registers cylinder (D), and steel pipe (5) other end is fixedly connected with flange (4).
8. novel burner according to claim 2, is characterized in that: described gas pipeline (A), primary air current-sharing cylinder (B), reduced pipe (1), cylinder (2), reduced pipe (14) are stainless steels.
9. novel burner according to claim 3, is characterized in that:
Distance (d4) between the M face of described reduced pipe (14) and the N face of primary air current-sharing cylinder (B) is 2 times of the diameter (d1) of described gas pipeline (A);
Distance (d5) between the center line of described flange (4) and the N face of primary air current-sharing cylinder (B) is about 1.5 times of the diameter (d3) of described secondary air registers cylinder (D);
Distance (L1) between the lower surface of the distance (L3) between the bottom surface of described flange (11) and the upper surface of Circular Plate (9) and described Circular Plate (7) and the upper surface of Circular Plate (12) equal, and also equal with the distance (L2) between the upper surface of described Circular Plate (7) and the upper surface of Circular Plate (9).
10. the critical piece Al of the novel burner as described in claim arbitrary in claim 1 to 9 2o 3coating Processes, this critical piece is described cylinder and described reduced pipe, it is characterized in that comprising the following steps:
The first step, carries out oil removal treatment to described critical piece to be coated;
Second step, carries out rinsed with deionized water to described critical piece surface to be coated;
3rd step, utilize hot dipping technology of crossing to aluminize on described critical piece surface to be coated, thickness is about 100 ~ 150 μm;
4th step, solute ions chooses the Na of 0.1mol/L 2siO 3the electrolyte aqueous solution of differential arc oxidation is mixed with deionized water;
5th step, prepares described critical piece to be coated using above-mentioned 3rd step and is positioned in described electrolyte aqueous solution as anode;
6th step, carries out electrolysis to above-mentioned electrolyte aqueous solution: adopt micro-arc oxidation device power supply to be 65kW; Adopt constant current mode, current density 5A/dm2, frequency 400Hz, dutycycle 10, the temperature of described electrolyte aqueous solution controls at 30 DEG C;
7th step, control preparation time is 150 ~ 180min, obtains the described Al that thickness is 200 ~ 300 μm after preparation 2o 3coating.
CN201510133770.8A 2015-03-25 2015-03-25 Novel combustor and Al2O3 coating treating method of main part of combustor Expired - Fee Related CN104764008B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498545A (en) * 1966-11-09 1970-03-03 Ronald Victor Short Gas burners
CN101965483A (en) * 2007-11-23 2011-02-02 西门子公司 Burner element and burner having aluminum oxide coating and method for coating a burner element
CN102141247A (en) * 2011-04-13 2011-08-03 中冶京诚工程技术有限公司 Flame adjusting burner of soaking pit furnace
CN102230625A (en) * 2011-02-16 2011-11-02 王平 Cascade ejector
CN203147769U (en) * 2013-04-02 2013-08-21 吴德福 Burner for rotary kiln
CN204534575U (en) * 2015-03-25 2015-08-05 洛阳理工学院 A kind of novel burner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498545A (en) * 1966-11-09 1970-03-03 Ronald Victor Short Gas burners
CN101965483A (en) * 2007-11-23 2011-02-02 西门子公司 Burner element and burner having aluminum oxide coating and method for coating a burner element
CN102230625A (en) * 2011-02-16 2011-11-02 王平 Cascade ejector
CN102141247A (en) * 2011-04-13 2011-08-03 中冶京诚工程技术有限公司 Flame adjusting burner of soaking pit furnace
CN203147769U (en) * 2013-04-02 2013-08-21 吴德福 Burner for rotary kiln
CN204534575U (en) * 2015-03-25 2015-08-05 洛阳理工学院 A kind of novel burner

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