CN116143380A - Efficient combustion system and control method for ultrathin float glass melting furnace - Google Patents
Efficient combustion system and control method for ultrathin float glass melting furnace Download PDFInfo
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- CN116143380A CN116143380A CN202211572576.6A CN202211572576A CN116143380A CN 116143380 A CN116143380 A CN 116143380A CN 202211572576 A CN202211572576 A CN 202211572576A CN 116143380 A CN116143380 A CN 116143380A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 84
- 238000002844 melting Methods 0.000 title claims abstract description 33
- 230000008018 melting Effects 0.000 title claims abstract description 33
- 239000005329 float glass Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 64
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 62
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000001301 oxygen Substances 0.000 claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 43
- 239000003345 natural gas Substances 0.000 claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 45
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000005352 clarification Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 238000005259 measurement Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000005507 spraying Methods 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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
- C03B5/2353—Heating the glass by combustion with pure oxygen or oxygen-enriched air, e.g. using oxy-fuel burners or oxygen lances
-
- 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
-
- 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
- F23D14/60—Devices for simultaneous control of gas and combustion 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
The invention discloses an efficient combustion system of an ultrathin float glass melting furnace and a control method, wherein the system comprises four groups of combustion furnaces arranged on two sides of a melting furnace pool, each group of combustion furnaces is provided with a main air supply pipe, each group of main air supply pipes is connected with a pure oxygen pipe, each pure oxygen pipe is provided with a ball valve, an electric flow regulating valve and a flowmeter, and the four pure oxygen pipes are connected with a pure oxygen source; the four groups of air supply main pipes are all provided with an online residual oxygen instrument, and the four groups of air supply main pipes are all connected with the combustion-supporting fan. According to the invention, the natural gas quantity can be accurately and automatically regulated according to the combustion flame temperature and the clarifying point temperature, the flame temperature is improved by improving the pure oxygen combustion in the front region and the oxygen-enriched combustion in the melting region, the reasonable clarifying temperature point is matched, the natural gas usage amount is accurately regulated, the natural gas usage amount is reduced, and the purpose of high-efficiency combustion is achieved.
Description
Technical Field
The invention belongs to the technical field of ultra-thin float glass manufacturing, and particularly relates to an efficient combustion system of an ultra-thin float glass melting furnace and a control method.
Background
At present, along with the strong advocated energy saving and emission reduction concepts of the country, the glass industry is taken as a pollution and energy consumption consumer, and becomes an important field of environmental treatment, and energy saving and smoke emission reduction of a melting furnace are important trends of current development. In the traditional float glass industry, oxygen enrichment or pure oxygen is introduced into combustion-supporting air to improve the combustion efficiency, but the whole melting furnace is wider, and when less oxygen is introduced, the combustion efficiency is not obviously improved; when the amount of the introduced gas is too high, the local combustion efficiency is improved, but the flame length is obviously shortened, the covering effect of the flame temperature in the kiln cannot be realized, the overall combustion efficiency is affected, meanwhile, the concentration of nitrogen oxides in the flue gas is not obviously reduced, the reduction is carried out by a denitration means such as the subsequent increase of the ammonia spraying amount, and the operation cost is greatly increased. The characteristic of the ultrathin floating normal line is that the kiln tonnage is small, the required fuel and the combustion-supporting air quantity are small, how to realize the integral promotion of flame length unchanged and combustion efficiency, and the natural air quantity and the combustion-supporting air quantity are accurately regulated and controlled, so that the final aim of energy conservation and emission reduction is achieved, and the method is a difficult problem to overcome in the technical field of the current ultrathin float melting kiln.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides an efficient combustion system of an ultrathin float glass melting furnace, which is characterized in that a pure oxygen pipeline and a combustion-supporting air pipe are designed to be connected, a pure oxygen regulating valve is designed, and meanwhile, an online residual oxygen meter is designed at the position of the rear end of the connection and mixing of pure oxygen and combustion-supporting air to detect the real-time oxygen content in mixed gas; through having infrared thermometer device at flame viewing port end, clarification end design, real-time supervision flame temperature and melting furnace clarification temperature change condition can be according to burning flame temperature and clarification point temperature, accurate automatic regulation and control natural gas volume, through improving the pure oxygen combustion of front region, the regional oxygen-enriched combustion of melting is in order to improve flame temperature, matches reasonable clarification temperature point, accurate adjustment natural gas usage, realizes that natural gas usage descends, reaches high-efficient burning purpose.
The technical purpose of the invention is realized by the following technical scheme: the high-efficiency combustion system of the ultrathin float glass melting furnace comprises four groups of combustion furnaces arranged on two sides of a melting furnace pool, wherein an air supply main pipe is respectively arranged for each group of combustion furnaces, each group of air supply main pipes is connected with a pure oxygen pipe, each pure oxygen pipe is provided with a ball valve, an electric flow regulating valve and a flowmeter, and the four pure oxygen pipes are connected with a pure oxygen source; the four groups of air supply main pipes are all provided with an online residual oxygen instrument, and the four groups of air supply main pipes are all connected with the combustion-supporting fan.
Preferably, the melting furnace pool is further provided with a pure oxygen combustion gun at the front side of the combustion furnace at the forefront end, the pure oxygen combustion gun is connected with a pure oxygen system, and the pure oxygen system is used for supplying air for the pure oxygen gun.
Preferably, the melting furnace pool is further provided with an infrared thermometer at the rear side of the combustion furnace at the rearmost end, and the infrared thermometer is used for measuring the temperature value of the clarified temperature measuring point in real time.
Preferably, four groups of the combustion furnaces are correspondingly provided with four groups of infrared thermometers for measuring flame temperature values of the four groups of combustion furnaces in real time.
Preferably, the intelligent monitoring system further comprises a calculator control unit, wherein the electric flow regulating valve, the online residual oxygen meter and the infrared thermometer are electrically connected with the calculator control unit.
The invention also provides a control method of the high-efficiency combustion system of the ultra-thin float glass melting furnace, which comprises the following steps:
s1, detecting the oxygen content of an oxygen-containing generating unit of a combustion furnace on an air supply main pipe;
s2, according to the oxygen content detected in the step S1, the pure oxygen inlet generating unit calculates and generates pure oxygen inlet amount, and the pure oxygen inlet amount is sent to the control unit;
s3, detecting flame temperature of each group of combustion furnaces by an infrared temperature generating unit of the combustion furnaces, and detecting clarifying point temperature by an infrared temperature generating unit of the clarifying points;
s4, according to the flame temperature and the clarifying point temperature in the step S3, the natural gas fuel proportion distribution generating unit calculates the natural gas inflow and sends the natural gas inflow to the control unit;
s5, detecting the concentration of nitrogen oxides in the combustion flue gas by a nitrogen oxide concentration generating unit in the flue gas;
s6, calculating the air inlet quantity of combustion-supporting air by a combustion-supporting air quantity proportion distribution generating unit according to the concentration of the nitrogen oxides detected in the step S5, and sending the air inlet quantity to a control unit;
and S7, respectively controlling a pure oxygen regulating valve, a natural gas regulating valve and a combustion air regulating valve by a control unit according to the calculation results of the steps S2, S4 and S6, so that the pure oxygen inflow amount, the natural gas inflow amount and the combustion air inflow amount reach expected values.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides an efficient combustion system of an ultrathin float glass melting furnace, which is characterized in that a pure oxygen pipeline and a combustion-supporting air pipe are designed to be connected, a pure oxygen regulating valve is designed, and meanwhile, an online residual oxygen instrument is designed at the position of the rear end of the connection and mixing of pure oxygen and combustion-supporting air, so that the real-time oxygen content in mixed gas is detected; through having infrared thermometer device at flame viewing port end, clarification end design, real-time supervision flame temperature and melting furnace clarification temperature change condition can be according to burning flame temperature and clarification point temperature, accurate automatic regulation and control natural gas volume, through improving the pure oxygen combustion of front region, the regional oxygen-enriched combustion of melting is in order to improve flame temperature, matches reasonable clarification temperature point, accurate adjustment natural gas usage, realizes that natural gas usage descends, reaches high-efficient burning purpose.
2. According to the control method of the high-efficiency combustion system of the ultrathin float glass melting furnace, provided by the invention, reasonable air-air ratio and oxygen content in mixed gas can be calculated through the control unit, so that the purposes of keeping the flame length of the ultrathin float-line low-tonnage furnace unchanged and improving the flame combustion temperature are realized through matching of flame temperature data and oxygen content data in combustion-supporting air.
Drawings
FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention.
FIG. 2 is a control flow diagram of an embodiment of the present invention.
FIG. 3 is a schematic diagram of control logic for one embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the actual production process of the ultrathin electronic glass, NO X The generation amount of the oxygen-enriched air is increased and then reduced along with the increase of the oxygen ratio in the oxygen-enriched air; through reducing the combustion-supporting air quantity, reducing the emission of the air quantity, the online monitoring system of the concentration of the nitrogen oxides in the flue gas and the online measuring system of the oxygen-enriched oxygen content in the combustion-supporting air are carried out by a PLD control system, and when the concentration of the nitrogen oxides (in the stable production state) exceeds the halving emission standard, the early warning is carried out, and the real-time adjustment is carried out.
Referring to fig. 1-3, as a preferred embodiment of the present invention, the present embodiment provides an ultra-thin float glass melting furnace efficient combustion system, which comprises four groups of combustion furnaces arranged at two sides of a melting furnace pool, each group of combustion furnaces is provided with a main gas supply pipe, each group of combustion furnaces is connected with a pure oxygen pipe, each pure oxygen pipe is provided with a ball valve, an electric flow control valve and a flowmeter, and the four pure oxygen pipes are all connected with a pure oxygen source; the four groups of the air supply main pipes are all provided with on-line residual oxygen meters which are used for detecting the real-time oxygen content in the mixed gas, and the four groups of the air supply main pipes are all connected with the combustion-supporting fan.
In some preferred embodiments, the melting furnace pool is further provided with a pure oxygen combustion gun at the front side of the combustion furnace at the forefront end, the pure oxygen combustion gun is connected with a pure oxygen system, the pure oxygen system is used for supplying air to the pure oxygen gun, and referring to fig. 1, in this embodiment, a 0# oxygen gun structure device is designed at the front end of the 1# small furnace to perform pure oxygen combustion, in this embodiment, by improving the pure oxygen combustion in the front area, the oxygen-enriched combustion in the melting area is used for improving the flame temperature, matching with reasonable clarification temperature points, accurately adjusting the natural gas usage amount, realizing the reduction of the natural gas usage amount, and achieving the purpose of efficient combustion.
In some preferred embodiments, four groups of the combustion furnaces are correspondingly provided with four groups of infrared thermometers for measuring flame temperature values and temperature change conditions of the four groups of combustion furnaces in real time, and the melting furnace tank is further provided with the infrared thermometers at the rear side of the combustion furnace at the rearmost end for measuring temperature values and temperature change conditions of clarified temperature measurement points in real time.
In other preferred embodiments, the device further comprises a calculator control unit, wherein the electric flow control valve, the online residual oxygen meter and the infrared thermometer are electrically connected with the calculator control unit, and the control unit adjusts the pure oxygen control valve, the natural gas control valve and the combustion air control valve in real time according to the detected real-time oxygen content, flame temperature value and temperature change condition, temperature value of a clarification temperature measurement point and temperature change condition in the mixed gas, so that the pure oxygen intake, the natural gas intake and the combustion air intake reach expected values.
The control method of the high-efficiency combustion system of the ultra-thin float glass melting furnace, referring to fig. 2 and 3, comprises the following steps:
s1, detecting the oxygen content of an oxygen-containing generating unit of a combustion furnace on an air supply main pipe;
s2, according to the oxygen content detected in the step S1, the pure oxygen inlet generating unit calculates and generates pure oxygen inlet amount, and the pure oxygen inlet amount is sent to the control unit;
s3, detecting flame temperature of each group of combustion furnaces by an infrared temperature generating unit of the combustion furnaces, and detecting clarifying point temperature by an infrared temperature generating unit of the clarifying points;
s4, according to the flame temperature and the clarifying point temperature in the step S3, the natural gas fuel proportion distribution generating unit calculates the natural gas inflow and sends the natural gas inflow to the control unit;
s5, detecting the concentration of nitrogen oxides in the combustion flue gas by a nitrogen oxide concentration generating unit in the flue gas;
s6, calculating the air inlet quantity of combustion-supporting air by a combustion-supporting air quantity proportion distribution generating unit according to the concentration of the nitrogen oxides detected in the step S5, and sending the air inlet quantity to a control unit;
and S7, respectively controlling a pure oxygen regulating valve, a natural gas regulating valve and a combustion air regulating valve by a control unit according to the calculation results of the steps S2, S4 and S6, so that the pure oxygen inflow amount, the natural gas inflow amount and the combustion air inflow amount reach expected values.
Referring to fig. 2 and 3, the control logic of the present invention is mainly as follows: the oxygen content generating unit of the 1# small furnace in the oxygen enrichment of the combustion-supporting air pre-stores a pure oxygen regulating valve control system and a combustion-supporting air regulating valve control system; the oxygen content distribution of each small furnace in the mixed gas is controlled by the oxygen content instant data of the mixed gas to influence the pure oxygen regulating valve position and the combustion air regulating valve of the next step; the upper limit of standard data is halved by setting the stable period of nitrogen oxides in the flue gas, and early warning is carried out after the standard is exceeded, and the combustion-supporting air quantity is adjusted in time; the flame infrared temperature generating unit of the # 1 4 small furnace and the clarifying infrared production unit are pre-stored together with a natural gas adjusting valve position control system, and the use amount of the natural gas adjusting valve position is controlled accurately by setting the clarifying infrared temperature value.
Referring to fig. 3, in the control of the invention, the accurate control is formed by designing an online measurement system of the clarified temperature and setting a process control value and the natural gas quantity; designing a flame temperature online measurement system and a combustion-supporting air oxygen content online measurement system to form accurate control; when the nitrogen oxide online measurement system exceeds the half emission standard upper limit value early warning, the nitrogen oxide online measurement system and the combustion-supporting air oxygen content online measurement system form accurate control; finally, the purposes of keeping the flame length of the ultra-thin float glass small-tonnage melting furnace unchanged, improving the overall combustion efficiency of the flame, reducing the consumption of natural gas, reducing the discharge of smoke and achieving the requirements of environmental protection and standard can be achieved by real-time monitoring.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (6)
1. The high-efficiency combustion system for the ultra-thin float glass melting furnace is characterized by comprising four groups of combustion furnaces arranged on two sides of a melting furnace pool, wherein each group of combustion furnaces is provided with a main air supply pipe, each group of main air supply pipe is connected with a pure oxygen pipe, each pure oxygen pipe is provided with a ball valve, an electric flow regulating valve and a flowmeter, and the four pure oxygen pipes are connected with a pure oxygen source; the four groups of air supply main pipes are all provided with an online residual oxygen instrument, and the four groups of air supply main pipes are all connected with the combustion-supporting fan.
2. An ultra-thin float glass furnace efficient combustion system as claimed in claim 1, wherein: the melting furnace pool is further provided with a pure oxygen combustion gun at the front side of the combustion furnace at the forefront end, the pure oxygen combustion gun is connected with a pure oxygen system, and the pure oxygen system is used for supplying air for the pure oxygen gun.
3. An ultra-thin float glass furnace efficient combustion system as claimed in claim 2, wherein: the melting furnace pool is positioned at the rearmost end and is also provided with an infrared thermometer at the rear side of the combustion furnace for measuring the temperature value of the clarified temperature measuring point in real time.
4. An ultra-thin float glass furnace efficient combustion system as claimed in claim 1, wherein: four groups of infrared thermometers are correspondingly arranged on the four groups of combustion furnaces and are used for measuring flame temperature values of the four groups of combustion furnaces in real time.
5. An ultra-thin float glass furnace efficient combustion system as claimed in claim 3, wherein: the intelligent oxygen residual meter further comprises a calculator control unit, and the electric flow regulating valve, the online oxygen residual meter and the infrared thermometer are electrically connected with the calculator control unit.
6. The control method of the high-efficiency combustion system of the ultra-thin float glass melting furnace is characterized by comprising the following steps of:
s1, detecting the oxygen content of an oxygen-containing generating unit of a combustion furnace on an air supply main pipe;
s2, according to the oxygen content detected in the step S1, the pure oxygen inlet generating unit calculates and generates pure oxygen inlet amount, and the pure oxygen inlet amount is sent to the control unit;
s3, detecting flame temperature of each group of combustion furnaces by an infrared temperature generating unit of the combustion furnaces, and detecting clarifying point temperature by an infrared temperature generating unit of the clarifying points;
s4, according to the flame temperature and the clarifying point temperature in the step S3, the natural gas fuel proportion distribution generating unit calculates the natural gas inflow and sends the natural gas inflow to the control unit;
s5, detecting the concentration of nitrogen oxides in the combustion flue gas by a nitrogen oxide concentration generating unit in the flue gas;
s6, calculating the air inlet quantity of combustion-supporting air by a combustion-supporting air quantity proportion distribution generating unit according to the concentration of the nitrogen oxides detected in the step S5, and sending the air inlet quantity to a control unit;
and S7, respectively controlling a pure oxygen regulating valve, a natural gas regulating valve and a combustion air regulating valve by a control unit according to the calculation results of the steps S2, S4 and S6, so that the pure oxygen inflow amount, the natural gas inflow amount and the combustion air inflow amount reach expected values.
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| CN202211572576.6A CN116143380A (en) | 2022-12-08 | 2022-12-08 | Efficient combustion system and control method for ultrathin float glass melting furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211572576.6A CN116143380A (en) | 2022-12-08 | 2022-12-08 | Efficient combustion system and control method for ultrathin float glass melting furnace |
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| CN111620551A (en) * | 2020-06-12 | 2020-09-04 | 株洲醴陵旗滨玻璃有限公司 | Float glass melting furnace with 0# oxygen lance and colored glass production method |
| CN113429116A (en) * | 2021-06-11 | 2021-09-24 | 秦皇岛玻璃工业研究设计院有限公司 | Gradient oxygen-increasing low-NOx combustion device and process for float glass melting furnace |
-
2022
- 2022-12-08 CN CN202211572576.6A patent/CN116143380A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140010703A (en) * | 2012-07-16 | 2014-01-27 | 주식회사 포스코 | Oxygen enriched combustion apparatus and method of the same |
| CN104418484A (en) * | 2013-09-06 | 2015-03-18 | 邢韫韬 | Fuel-gas double-preheating high-temperature oxygen-enriched hydrocarbon heat circulation nitrogen-free unidirectional radiation combustion system |
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| CN113429116A (en) * | 2021-06-11 | 2021-09-24 | 秦皇岛玻璃工业研究设计院有限公司 | Gradient oxygen-increasing low-NOx combustion device and process for float glass melting furnace |
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