CN112944344A - Oxygen jet flow multistage dispersion combustion roaster - Google Patents
Oxygen jet flow multistage dispersion combustion roaster Download PDFInfo
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- CN112944344A CN112944344A CN202110178597.9A CN202110178597A CN112944344A CN 112944344 A CN112944344 A CN 112944344A CN 202110178597 A CN202110178597 A CN 202110178597A CN 112944344 A CN112944344 A CN 112944344A
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- burner
- primary
- gas
- oxygen jet
- metal structure
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000001301 oxygen Substances 0.000 title claims abstract description 50
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 50
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 44
- 239000006185 dispersion Substances 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- 239000003034 coal gas Substances 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 25
- 238000009792 diffusion process Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000011449 brick Substances 0.000 abstract 1
- 238000009749 continuous casting Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to an oxygen jet flow multistage dispersion combustion roaster which comprises a metal structure burner and a refractory burner brick, wherein the metal structure burner is arranged in the center of a covering, the metal structure burner is of a four-layer sleeve structure, the center of the metal structure burner is a primary compressed air channel, and a primary coal gas channel, a secondary combustion air channel and a secondary coal gas channel are sequentially arranged outside the primary compressed air channel; the compressed air nozzle is of a contraction-shaped conical structure and is arranged at the bottom of the primary compressed air channel; the primary gas circular seam is arranged at the bottom of the primary gas channel; the secondary air circular seam is arranged at the bottom of the secondary combustion air channel; the secondary gas circular seam is arranged at the bottom of the secondary gas channel; the metal structure burner is externally fixed with an oxygen jet orifice, and the burner nozzle is integrally fixed in the burner block. The advantages are that: the oxygen high-speed jet flow is utilized to strengthen the heating of the bottom of the steel ladle, reduce the temperature difference between the upper part and the lower part of the steel ladle and avoid the formation of a local high-temperature area due to large oxygen concentration.
Description
Technical Field
The invention belongs to the field of oxygen-enriched and pure oxygen combustion, and particularly relates to an oxygen jet multistage dispersion combustion roaster.
Background
After tapping of the converter, high-temperature liquid molten steel needs to be poured into a ladle, the ladle is operated to be refined and continuously cast, and finally an empty ladle returns to the front of the converter to wait for the next molten steel to be filled. During the whole turnover process of filling molten steel in the ladle, the ladle lining refractory material directly contacts the molten steel, partial heat is absorbed to store heat, the surface of the ladle wall radiates heat to the atmosphere, and the surface of the molten steel radiates heat, so that the temperature of the molten steel is reduced. Particularly, in the process of returning from an empty ladle in the continuous casting process and the process of waiting for molten steel receiving before a converter, the temperature of a ladle lining is greatly reduced, and the temperature of the molten steel is reduced fastest after the steel receiving.
Therefore, in order to reduce the heat loss of the molten steel during steel receiving, the ladle needs to be baked before the steel receiving, the temperature of the ladle lining is increased, and the temperature drop of the molten steel after the steel receiving is reduced.
At present, a heat accumulating type steel ladle baking technology is widely adopted, wherein two burners alternately perform combustion and smoke exhaust, and the waste heat of the smoke is recovered to preheat combustion-supporting air or coal gas. The energy-saving effect is good, but after the system is actually used for a period of time, due to the fact that the equipment structure is complex, the reversing valve is frequently reversed, the equipment failure rate is high, the heat accumulator is also frequently blocked and crushed, the maintenance amount is large, and in the later period, the whole system is in a breakdown state, and the heat accumulation function is lost. And the flame floats upwards, the airflow is short-circuited, the bottom of the ladle cannot be reached, and the steel sticking phenomenon is easily caused by large temperature difference between the upper part and the lower part of the baking of the ladle.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an oxygen jet flow multistage dispersion combustion roaster, wherein coal gas and combustion-supporting gas of a roasting burner are fed in a grading way, and high-pressure oxygen is sprayed out to generate high speedJetting, wherein the ladle bottom airflow is stirred, simultaneously, the mixture of the surrounding coal gas and the flue gas of the primary combustion is sucked, and secondary dispersion combustion without a flame interface is formed in the ladle; the roaster can uniformly bake the steel ladle at the upper and lower temperatures and reduce NOxAnd (4) generating.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an oxygen jet flow multistage diffusion combustion roaster comprises a metal structure burner and a refractory burner block, wherein the metal structure burner is arranged in the center of a covering, the metal structure burner is of a four-layer sleeve structure, the center of the metal structure burner is a primary compressed air channel, and a primary coal gas channel, a secondary combustion air channel and a secondary coal gas channel are sequentially arranged outside the primary compressed air channel; the compressed air nozzle is of a contraction-shaped conical structure and is arranged at the bottom of the primary compressed air channel; the primary gas circular seam is arranged at the bottom of the primary gas channel, and primary gas is sprayed out from the primary gas circular seam; the secondary air circular seam is arranged at the bottom of the secondary combustion-supporting air channel, and secondary combustion-supporting air is sprayed out from the secondary air circular seam and is mixed with primary coal gas after being sprayed out; the secondary gas circular seam is arranged at the bottom of the secondary gas channel, and secondary gas is sprayed out from the secondary gas circular seam, mixed with a primary gas combustion product after being sprayed out, and simultaneously entrained by the tertiary oxygen jet flow of the outer ring to form a dispersion combustion state; the metal structure burner is externally fixed with an oxygen jet orifice, and the burner nozzle is integrally fixed in the burner block.
The ejection speed of the compressed air nozzle is 50-150 m/s.
And 3-6 coal gas swirl plates are arranged at the nozzle of the primary coal gas circular seam.
The oxygen jet orifices are circular, the number of the oxygen jet orifices is 3-12, and the oxygen jet speed is 50-200 m/s.
The first-stage coal gas accounts for 10-30% of the total coal gas.
Still include the ignition nozzle, the metal construction nozzle whole inlay in resistant material burner block, adopt refractory castable monolithic pouring, set up the ignition hole in the resistant material burner block, the ignition nozzle is installed in the ignition hole of resistant material burner block.
The metal structure burner and the refractory burner block are of an integrated structure and are installed on the covering through a steel structure and fixing bolts.
Compared with the prior art, the invention has the beneficial effects that:
the oxygen jet flow multistage dispersion combustion roaster utilizes high-speed jet flow of oxygen to strengthen the bottom heating of a steel ladle and reduce the temperature difference between the upper part and the lower part of the steel ladle, the high-speed jet flow of oxygen sucks ambient gas to be added into coal gas for mixed combustion, a dispersion combustion state is formed in the steel ladle, the formation of a local high-temperature area due to high oxygen concentration is avoided, the roasting uniformity can be improved, and NO is reducedxAnd (4) production capacity. Oxygen is adopted to participate in combustion, so that the heat loss of discharged waste gas is reduced, the baking efficiency is improved, and coal gas is saved.
When the roaster is used for roasting the ladle, the coal gas is supplied in two stages, and the combustion-supporting gas is supplied in three stages, namely: primary central air, secondary combustion air and tertiary oxygen. The primary central air is compressed air, the length and rigidity of the flame are improved, secondary combustion-supporting air and primary coal gas are mixed and combusted to form stable flame, tertiary oxygen is sprayed out from the spray holes at high speed to the bottom of the ladle, air flow in the ladle is stirred, and the bottom heating of the ladle is strengthened. The secondary gas is sprayed out and mixed with the primary gas combustion flue gas to form rich gas, and the rich gas is sucked and mixed by the three-level oxygen to form dispersion combustion, so that the temperature uniformity in the ladle is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a bottom schematic view of a metallic structure burner.
In the figure: 1-a ladle cover 2-a metal structure burner 3-a refractory burner block 4-an oxygen jet orifice 5-a burner nozzle 6-a compressed air jet orifice 7-a primary gas circular seam 8-a gas vortex sheet 9-a secondary air circular seam 10-a secondary gas circular seam 11-a fixing bolt.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.
Referring to fig. 1 and 2, the oxygen jet multistage diffusion combustion roaster comprises a metal structure burner 2 and a refractory burner block 3, wherein the metal structure burner 2 is arranged in the center of a covering 1, the metal structure burner 2 is of a four-layer sleeve structure, the center is a primary compressed air channel, and the outside of the primary compressed air channel is sequentially provided with a primary coal gas channel, a secondary combustion air channel and a secondary coal gas channel; the compressed air nozzle 6 is in a contraction-shaped conical structure and is arranged at the bottom of the primary compressed air channel; the primary gas circular seam 7 is arranged at the bottom of the primary gas channel, and primary gas is sprayed out from the primary gas circular seam 7; the secondary air circular seam 9 is arranged at the bottom of the secondary combustion air channel, secondary combustion air is sprayed out from the secondary air circular seam 9 and is mixed with primary coal gas after being sprayed out to form stable flame, so that the baking safety and reliability are ensured; the secondary gas circular seam 10 is arranged at the bottom of the secondary gas channel, secondary gas is sprayed out from the secondary gas circular seam 10, is mixed with a primary gas combustion product after being sprayed out, and is simultaneously sucked by the tertiary oxygen jet flow of the outer ring to form a dispersion combustion state.
An oxygen jet orifice 4 is fixed outside the metal structure burner 2, and a burner nozzle 5 is integrally fixed in the burner block.
Wherein the ejection speed of the compressed air nozzle 6 is 50 to 150 m/s. 3-6 gas vortex sheets 8 are arranged at the nozzle of the primary gas circular seam 7, and the flame stabilizing effect is achieved. The oxygen injection ports 4 are circular, the number of the oxygen injection ports 4 is 3-12, and the oxygen injection speed is 50-200 m/s. The first-stage coal gas accounts for 10-30% of the total coal gas, and the second-stage coal gas accounts for 70-90% of the total coal gas. The metal structure burner 2 is integrally embedded in the refractory burner block 3, the refractory castable is integrally poured, an ignition hole is formed in the refractory burner block 3, and the ignition burner is installed in the ignition hole of the refractory burner block 3 to realize an automatic ignition function. The metal structure burner 2 and the refractory burner block 3 are of an integrated structure, are arranged on the covering 1 through a steel structure and a fixing bolt 11, and can be detached.
When the steel ladle needs to be baked, the secondary combustion-supporting air and the primary coal gas in the center are firstly started, the primary compressed air in the center is started after flame is stabilized, finally the secondary coal gas and the tertiary oxygen in the outer ring are started, baking is finished after the target baking temperature is reached, the whole baking device is closed, and the baked steel ladle is conveyed to be connected with steel.
Example 1
In a certain 100-ton ladle, coke oven gas is used as fuel, and an oxygen jet multistage dispersion combustion roaster is adopted. The steel ladle is transported back by a continuous casting empty ladle and needs to be baked, secondary combustion air and primary gas in the center are firstly started, primary compressed air in the center is started after flame is stabilized, and finally secondary gas and tertiary oxygen in the outer ring are started, the temperature reaches 1080 ℃ after baking is carried out for 24 minutes, and the steel ladle is conveyed to a converter to wait for steel receiving. The gas consumption is 585Nm3Reduction of/h to 320Nm3The fuel saving rate is 45.3 percent per hour.
Example 2
In a 200-ton ladle, mixed gas is used as fuel, and an oxygen jet multistage dispersion combustion roaster is adopted. The steel ladle is transported back by a continuous casting empty ladle and needs to be baked, secondary combustion air and primary gas in the center are firstly started, primary compressed air in the center is started after flame is stabilized, and finally secondary gas and tertiary oxygen in the outer ring are started, the temperature reaches 1109 ℃ after baking is finished for 38 minutes, and the steel ladle is sent to a converter to wait for steel receiving. The gas consumption is from 1806Nm3Reduction of the reaction time/h to 929m3And h, saving coal gas by 48.6 percent.
Example 3
In a certain 200-ton ladle, converter gas is used as a fuel, and an oxygen jet multistage dispersion combustion roaster is adopted. The steel ladle is transported back by a continuous casting empty ladle and needs to be baked, secondary combustion air and primary gas in the center are firstly started, primary compressed air in the center is started after flame is stabilized, and finally secondary gas and tertiary oxygen in the outer ring are started, the temperature reaches 1077 ℃ after baking for 32 minutes, and the steel ladle is sent to a converter to wait for steel receiving after the baking is finished. The gas consumption is changed from the original 3679Nm3The/h is reduced to 1648m3And h, saving coal gas by 55.2 percent.
Claims (7)
1. The oxygen jet flow multistage diffusion combustion roaster is characterized by comprising a metal structure burner and a refractory burner block, wherein the metal structure burner is arranged in the center of a covering, the metal structure burner is of a four-layer sleeve structure, the center of the metal structure burner is a primary compressed air channel, and a primary coal gas channel, a secondary combustion air channel and a secondary coal gas channel are sequentially arranged outside the primary compressed air channel; the compressed air nozzle is of a contraction-shaped conical structure and is arranged at the bottom of the primary compressed air channel; the primary gas circular seam is arranged at the bottom of the primary gas channel, and primary gas is sprayed out from the primary gas circular seam; the secondary air circular seam is arranged at the bottom of the secondary combustion-supporting air channel, and secondary combustion-supporting air is sprayed out from the secondary air circular seam and is mixed with primary coal gas after being sprayed out; the secondary gas circular seam is arranged at the bottom of the secondary gas channel, and secondary gas is sprayed out from the secondary gas circular seam, mixed with a primary gas combustion product after being sprayed out, and simultaneously entrained by the tertiary oxygen jet flow of the outer ring to form a dispersion combustion state; the metal structure burner is externally fixed with an oxygen jet orifice, and the burner nozzle is integrally fixed in the burner block.
2. The oxygen jet multistage diffusion combustion roaster as claimed in claim 1, wherein the jet speed of the compressed air is 50-150 m/s.
3. The oxygen jet multistage diffusion combustion roaster as claimed in claim 1, wherein 3-6 gas swirl plates are arranged at the nozzle of the primary gas circumferential weld.
4. The oxygen jet multistage diffusion combustion roaster as claimed in claim 1, wherein the oxygen jet orifice is circular, the number of the oxygen jet orifices is 3-12, and the oxygen ejection speed is 50-200 m/s.
5. The oxygen jet multistage diffusion combustion roaster of claim 1, wherein the primary gas accounts for 10% -30% of the total gas.
6. The oxygen jet multistage diffusion combustion roaster as claimed in claim 1, further comprising an ignition burner, wherein the metallic burner is integrally embedded in a refractory burner block, and is integrally cast by using a refractory castable, an ignition hole is formed in the refractory burner block, and the ignition burner is installed in the ignition hole of the refractory burner block.
7. The oxygen jet multistage diffusion combustion roaster as claimed in claim 1, wherein the metal structure burner and the refractory burner block are of an integral structure and are installed on the cover through a steel structure and fixing bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110178597.9A CN112944344A (en) | 2021-02-09 | 2021-02-09 | Oxygen jet flow multistage dispersion combustion roaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110178597.9A CN112944344A (en) | 2021-02-09 | 2021-02-09 | Oxygen jet flow multistage dispersion combustion roaster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112944344A true CN112944344A (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110178597.9A Pending CN112944344A (en) | 2021-02-09 | 2021-02-09 | Oxygen jet flow multistage dispersion combustion roaster |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113732278A (en) * | 2021-08-31 | 2021-12-03 | 武汉科虹工业炉有限公司 | Self-preheating ladle baking device with high-speed jet flow heat exchange |
| CN113814383A (en) * | 2021-08-31 | 2021-12-21 | 武汉科虹工业炉有限公司 | Self-preheating tundish baking device with high-speed jet flow heat exchange function |
| CN114535554A (en) * | 2022-02-22 | 2022-05-27 | 重庆燃控科技有限公司 | Multi-fuel oxygen-enriched steel ladle baking system |
| CN116293687A (en) * | 2023-04-11 | 2023-06-23 | 沧州市天龙燃烧设备有限公司 | Natural ventilation low-nitrogen burner |
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| CN203177179U (en) * | 2013-03-27 | 2013-09-04 | 鞍钢股份有限公司 | Oxygen enrichment burning nozzle capable of quickly improving temperature of furnace end |
| CN108061301A (en) * | 2018-01-23 | 2018-05-22 | 上海云汇环保科技有限公司 | A kind of novel steel ladle baking burner |
| CN109506237A (en) * | 2018-12-04 | 2019-03-22 | 重庆燃控科技有限公司 | A kind of oxygen enriching pure oxygen three uses burner |
| CN112128753A (en) * | 2020-09-27 | 2020-12-25 | 四川泷涛环境工程有限公司 | Low heat value gas burner |
-
2021
- 2021-02-09 CN CN202110178597.9A patent/CN112944344A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203177179U (en) * | 2013-03-27 | 2013-09-04 | 鞍钢股份有限公司 | Oxygen enrichment burning nozzle capable of quickly improving temperature of furnace end |
| CN108061301A (en) * | 2018-01-23 | 2018-05-22 | 上海云汇环保科技有限公司 | A kind of novel steel ladle baking burner |
| CN109506237A (en) * | 2018-12-04 | 2019-03-22 | 重庆燃控科技有限公司 | A kind of oxygen enriching pure oxygen three uses burner |
| CN112128753A (en) * | 2020-09-27 | 2020-12-25 | 四川泷涛环境工程有限公司 | Low heat value gas burner |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113732278A (en) * | 2021-08-31 | 2021-12-03 | 武汉科虹工业炉有限公司 | Self-preheating ladle baking device with high-speed jet flow heat exchange |
| CN113814383A (en) * | 2021-08-31 | 2021-12-21 | 武汉科虹工业炉有限公司 | Self-preheating tundish baking device with high-speed jet flow heat exchange function |
| CN113732278B (en) * | 2021-08-31 | 2022-12-16 | 武汉科虹工业炉有限公司 | Self-preheating ladle baking device with high-speed jet flow heat exchange |
| CN113814383B (en) * | 2021-08-31 | 2022-12-16 | 武汉科虹工业炉有限公司 | Self-preheating tundish baking device with high-speed jet flow heat exchange function |
| CN114535554A (en) * | 2022-02-22 | 2022-05-27 | 重庆燃控科技有限公司 | Multi-fuel oxygen-enriched steel ladle baking system |
| CN116293687A (en) * | 2023-04-11 | 2023-06-23 | 沧州市天龙燃烧设备有限公司 | Natural ventilation low-nitrogen burner |
| CN116293687B (en) * | 2023-04-11 | 2023-08-29 | 沧州市天龙燃烧设备有限公司 | Natural ventilation low-nitrogen burner |
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Application publication date: 20210611 |
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