CN116412399A - Dual-fuel dual-heat-storage low-NO X Burner and combustion control method - Google Patents
Dual-fuel dual-heat-storage low-NO X Burner and combustion control method Download PDFInfo
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- CN116412399A CN116412399A CN202310234751.9A CN202310234751A CN116412399A CN 116412399 A CN116412399 A CN 116412399A CN 202310234751 A CN202310234751 A CN 202310234751A CN 116412399 A CN116412399 A CN 116412399A
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- 239000000446 fuel Substances 0.000 title claims abstract description 86
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 54
- 238000005338 heat storage Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009825 accumulation Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 97
- 230000009977 dual effect Effects 0.000 claims description 21
- 239000000779 smoke Substances 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000011449 brick Substances 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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- 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
-
- 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
- F23D14/48—Nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to the technical field of fuel combustion of metallurgical casting furnaces, in particular to a dual-fuel dual-heat-accumulation low-NOX burner which comprises a combustion chamber, a gas channel and a heat accumulation structure, wherein the combustion chamber is provided with a second fuel conveying pipe in the middle for introducing a second fuel into the combustion chamber; the gas channels comprise gas channels and air channels, are independent from each other and are respectively communicated with the combustion chamber; the heat storage structure comprises a plurality of rows and columns of heat storage honeycomb bodies and is arranged in the gas channel. The method solves the problem that the blast furnace gas is used as fuel, and other fuel normal production schemes can be adopted when the blast furnace gas is insufficient or not, so that the blast furnace gas can be more freely and widely applied in the kiln, and the kiln using the blast furnace gas is not limited by the supply quantity of the blast furnace gas.
Description
Technical Field
The invention relates to the technical field of fuel combustion of metallurgical casting furnaces, and particularly provides a dual-fuel dual-heat-storage low-NOX burner and a combustion control method.
Background
With the increasing requirements of China on energy conservation and environmental protection, the waste utilization of the steel industry and the emission standards of NOX, SO2 and the like of an industrial kiln in China are becoming strict, and the ultra-low emission level is required to be achieved. In order to better utilize the blast furnace gas and reduce the exhaust gas emissions. Therefore, the energy-saving and emission-reducing facilities of the metallurgical casting kiln are important.
Blast furnace gas is waste gas generated in the production process of the blast furnace, but contains combustible gas mainly containing CO, and if directly discharged, the gas pollutes the atmosphere and is also extremely wasteful of the resource. But the temperature requirement of the kiln cannot be met if the blast furnace gas is directly burnt for use because the heat value of the blast furnace gas is relatively low.
With the use of a large amount of heat accumulating technology, blast furnace gas is applied in a large amount, but the problem of insufficient supply of blast furnace gas also occurs, and as blast furnace gas is a byproduct in blast furnace production, the heat value and the gas quantity of the blast furnace gas are unstable, but gas using equipment is required to be continuously produced, so that the production yield and the product quality of the blast furnace gas are greatly influenced when the supply of the blast furnace gas is insufficient.
The NOX products produced when fuel burns are mainly three: the fuel is formed by oxidizing nitride in the fuel at 600-800 ℃,2 hydrocarbon in fuel volatile matters is decomposed at high temperature to generate CH free radicals which react with nitrogen and oxygen in air to generate 3, nitrogen in combustion air is oxidized at high temperature to generate a product, the generation amount is small below 1350 ℃, and the yield is exponentially increased along with the rising of the temperature.
For the regenerative burner, blast furnace gas and coke oven gas are used as main fuels, and the heat value is low, so the temperature during combustion is not very high. And the heat accumulation is not very low, so that a large amount of NOX is avoided, if natural gas, coal bed gas, light diesel oil and other fuels are used as fuels, the heat accumulation technology is adopted, the combustion air temperature is very high, so that the flame temperature is relatively high, NOX generated at high temperature during combustion is difficult to control, the NOX emission of kilns using natural gas, coal bed gas, light diesel oil and other fuels in China is generally very high, and is more than 150mg/M3 (8% oxygen content) which exceeds the environmental protection requirement.
There is a need for a low NOX burner and combustion control method that can simultaneously combust two fuels, a blast furnace gas and other fuels, with dual heat storage of the blast furnace gas and air.
Disclosure of Invention
In order to solve the problems, the invention provides a dual-fuel dual-heat storage low NO X The burner comprises a combustion chamber, a gas channel and a heat accumulating structure,
the combustion chamber is provided with a fuel conveying pipe in the middle, and is used for introducing fuel into the combustion chamber;
the gas channels comprise gas channels and air channels, are independent from each other and are respectively communicated with the combustion chamber;
the heat storage structure comprises a plurality of rows and columns of heat storage honeycomb bodies and is arranged in the gas channel.
Further, the fuel delivery pipe also comprises a protection air pipe which is sleeved on the periphery of the fuel delivery pipe and is provided with a gap with the fuel delivery pipe; a protective air inlet is arranged on the protective air pipe far away from the combustion chamber side; the length of the protection air pipe is matched with that of the fuel conveying pipeline, and a gap is formed between the protection air pipe and the fuel conveying pipeline.
Furthermore, the gas channel and the air channel are provided with cabin doors matched with the internal heat storage structure.
Further, in the cavity, two sides of the fuel conveying pipe are respectively provided with a smoke discharging channel.
Further, the heat accumulating honeycomb body can be divided into a plurality of groups to be arranged in the gas channel, support bricks are erected between adjacent groups, and two ends of each brick are inserted into the inner wall of the gas channel.
Further, the side wall of the combustion chamber is designed to be open at the contact position with the tail end nozzle of the fuel conveying pipe.
Further, a blast furnace gas pipeline is led into the opening of the blast furnace gas channel, and a flowmeter is arranged on the blast furnace gas pipeline; an air pipeline is introduced into the opening of the air channel; in addition, a fan is arranged at the opening of the air channel.
According to another aspect of the present invention, there is also provided a dual fuel dual thermal storage low NO X The burner burning control method is that the burners are arranged on two sides of the hearth in pairs, and the smoke exhaust channels of the two burners are respectively communicated with the middle hearth; the two blast furnace gas pipelines are communicated to a gas main pipeline, and a gas steering valve is arranged on the pipeline; the two air pipelines are communicated with an air main pipeline, an air steering valve is arranged on the pipeline, the method comprises the following steps,
step 1: after the combustion cavity is ignited, air and blast furnace gas are simultaneously introduced into the burner through two channels of one burner; simultaneously stopping introducing air and blast furnace gas into the channels of the burners at the opposite sides, and starting a fan to suck out the flue gas in the hearth from the gas channels at the opposite sides;
step 2: opening a gas steering valve and an air steering valve, and introducing air and blast furnace gas into the burner on the opposite side; stopping introducing air and blast furnace gas into the burnt burner, and starting a fan to suck out smoke in the hearth from a burnt burner channel; the two burners are switched between three minutes and one time to store heat for the honeycomb body and heat the hearth.
Further, when the flow rate of the blast furnace gas on the flowmeter is reduced, the second fuel is introduced into the burner through the fuel conveying pipe, so that the two fuels are mixed and combusted in any proportion.
Further, the flow ratio of the heat accumulating air to the protecting air required by the inlet amount of the second fuel is 7:3.
further, during combustion of the second fuel, the oxygen content in the combustion is reduced by two methods of adding air and flue gas, and the combustion temperature is reduced, so that NO is reduced X Is generated.
The invention has the advantages that: the method solves the problem that when the blast furnace gas is used as fuel, other fuel normal production schemes can be adopted when the blast furnace gas is insufficient or not, so that the blast furnace gas (first fuel) is utilized more fully, and a kiln using the blast furnace gas is not limited by the supply quantity of the blast furnace gas. In addition, the burner not only realizes the double heat storage of blast furnace gas and air, but also enables the burner to be used by burning a second fuel simultaneously through a unique structure and a combustion control method of the burner, and the two fuels can be used by burning in any proportion, and can also be used independently, so that the emission of NOX during burning is very low.
Drawings
FIG. 1 is a schematic view of a burner according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure A-A in FIG. 1;
FIG. 3 is a schematic view of the B-B structure of FIG. 1;
FIG. 4 is a schematic view of the structure of C-C in FIG. 2;
FIG. 5 is a rear view of FIG. 1;
FIG. 6 is a schematic view of the structure D-D in FIG. 5;
1-combustion chamber, 2-gas channel, 3-air channel, 4-heat accumulating honeycomb body, 5-protection tuber pipe, 6-fuel delivery pipe, 7-exhaust passage, 8-hatch door, 9-support brick, 10-first circulation area, 11-second circulation area, 12-third circulation area, 13-fourth circulation area.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to FIGS. 1-6, the present invention provides a dual fuel dual thermal storage low NO X The burner comprises a combustion chamber 1, a gas channel and a heat accumulating structure,
a combustion chamber 1, wherein a fuel delivery pipe 6 is arranged in the middle of the combustion chamber 1 and is used for introducing fuel into the combustion chamber 1;
the gas channels comprise a gas channel 2 and an air channel 3, are independent from each other and are respectively communicated with the combustion chamber 1;
the heat storage structure comprises a plurality of rows and columns of heat storage honeycomb bodies 4, and is arranged in the gas channel.
The double heat accumulating burner body has steel structure casing outside, air channel and blast furnace gas channel separated completely with steel structure, steel fiber refractory casting material inside, mullite honeycomb body 4 inside.
As an improvement of the scheme, the fuel delivery pipe also comprises a protection air pipe 5 which is sleeved on the periphery of the fuel delivery pipe 6 and is provided with a gap with the fuel delivery pipe 6; a protective air inlet is arranged on the protective air pipe 5 far away from the combustion chamber 1; the length of the protection air pipe 5 is matched with that of the fuel conveying pipe 6, and a gap is formed between the protection air pipe 5 and the fuel conveying pipe 6. In the combustion chamber 1, a smoke exhaust passage 7 is provided on each side of the fuel delivery pipe 6. The fuel feed pipe 6 is used for feeding the second fuel into the combustion chamber 1 in the nozzle, and forms a flame port at the inner end of the combustion chamber 1. The left side and the right side of the nozzle are provided with a smoke discharging channel 7, the middle of the nozzle is provided with a blast furnace gas and combustion supporting wind burning nozzle after heat accumulation, the blast furnace gas enters from one side, the combustion supporting wind enters from the other side, the middle of the nozzle is provided with a second fuel nozzle and a protection wind pipe 5 thereof, the smoke in the furnace is brought into burning flame by negative pressure generated by the external spraying of the nozzle during burning, so that the flame core temperature is reduced, NOX is reduced, the second fuel is burnt by adding primary wind and bringing the smoke into the furnace, so that the flame is burnt in a sectional mode to release heat gradually, the NOX is reduced by the flame core temperature, and the more complete burning is favorable for achieving the effects of energy conservation and emission reduction.
As an improvement of the scheme, the gas channel 2 and the air channel 3 are provided with cabin doors 8 matched with the positions of the internal heat storage structures. The double cabin doors 8 can be designed at the rear, so that the heat accumulator can be replaced conveniently.
As an improvement of the scheme, the heat accumulating honeycomb body 4 can be divided into a plurality of groups which are arranged in the gas channel, and support bricks 9 are erected between the adjacent groups, and two ends of each brick 9 are inserted into the inner wall of the gas channel. The heat accumulating honeycomb body 4 absorbs the heat of the flue gas discharged from the hearth, heats the passing blast furnace gas, and has low heat value and combustion temperature of the blast furnace gas before heating, and the temperature of the blast furnace gas after being heated by the heat accumulating honeycomb body 4 and then being combusted can reach more than 1200 ℃. Therefore, the heat accumulating burner is adopted, the flame temperature and the rigidity are improved, 80% of heat energy in the flue gas is largely recovered, waste is utilized, and energy conservation and emission reduction can be realized.
As an improvement of the scheme, the contact part of the side wall of the combustion chamber 1 and the tail end nozzle of the fuel conveying pipe 6 is of an open design, namely a round table-shaped opening, so that the flame can be conveniently sprayed, and more air can be contacted.
As an improvement of the scheme, the opening of the blast furnace gas channel 2 is communicated with a blast furnace gas pipeline, and a flowmeter is arranged on the blast furnace gas pipeline, so that the supply quantity of blast furnace gas can be conveniently observed at any time; an air pipeline is introduced into the opening of the air channel 3; in addition, fans are respectively arranged at the openings of the air channels. The fan has the function that when the burner burns, combustion air is blown into the burner through the fan, and when the burner stops burning, smoke is discharged outwards to absorb heat to heat the heat accumulator.
According to another aspect of the present invention, there is also provided a dual fuel dual thermal storage low NO X The burner combustion control method is that the burners are arranged on two sides of a hearth in pairs, and smoke exhaust channels 7 of the two burners are respectively communicated with the middle hearth; the two blast furnace gas pipelines are communicated to a gas main pipeline, and a gas steering valve is arranged on the pipeline; two air pipes are connected to an air main pipe in the same wayAn air steering valve is arranged on the pipeline, comprising the following steps,
step 1: after the combustion cavity is ignited, air and blast furnace gas are simultaneously introduced into the burner through two channels of one burner; simultaneously stopping introducing air and blast furnace gas into the channels of the burners at the opposite sides, and starting a fan to suck out the flue gas in the hearth from the gas channels at the opposite sides;
step 2: opening a gas steering valve and an air steering valve, and introducing air and blast furnace gas into the burner on the opposite side; stopping introducing air and blast furnace gas into the burnt burner, and starting a fan to suck out smoke in the hearth from a burnt burner channel; the two burners are switched between three minutes and one time to store heat for the honeycomb body 4 and heat the hearth.
As an improvement of the scheme, when the flow rate of the blast furnace gas on the flowmeter is reduced, the second fuel is introduced into the burner through the fuel conveying pipe 6, so that the two fuels are mixed and combusted in any proportion.
As an improvement of the scheme, the flow ratio of the inlet amount of the second fuel to the flow of the protection wind is 7:3. the ratio is calculated by theory and summarized by years of practical use and can reduce NO most effectively X Is generated.
As an improvement of the scheme, the second fuel is combusted by adding air twice and adding smoke twice to reduce the oxygen content in the combustion and reduce the combustion temperature, thereby reducing NO X Is generated.
As an improvement of the scheme, in the scheme, the air inlet and smoke exhaust channels in the burner are divided into four walking areas with different sections, namely a first flowing area 10, a second flowing area 11, a third flowing area 12 and a fourth flowing area 13; the cross section of the fourth flow area 13 is rectangular and is communicated with the third flow area 12, the top-view cross section of the third flow area 12 is trapezoid and gradually narrows away from the fourth flow, the top-view cross section of the second flow area 11 comprises a bending part and a vertical part, the upper part of the bending part is inclined, the bending part is respectively connected with the third flow area 12 and the first flow area 10, the width of the cross section at the connection part of the first flow area 10 and the second flow area 11 is smaller than the width of the second flow area 11, the cross sections are different, and the wind speed pressure at each position is controlled to be different. The air inlet and the air outlet are regulated not to run on the same path. When the air (gas) is introduced, the compressed gas flows at a high speed, and the air linearly enters along the fourth flow region 13, the third flow region 12, and the first flow region 10 via the bent portion of the second flow region 11. When smoke is discharged, the smoke is sucked, the suction has no direction, and the large area of the flow area can suck the smoke. The cross-sectional area of the second flow-through region 11 is much larger than the area of the first flow-through region 10, and most of the flue gas is discharged from the second flow-through region 11 into the third flow-through region 12 and the fourth flow-through region 13. Thus, the smoke exhaust can effectively protect the supply pipe and the protection air pipe of the second fuel.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. Dual-fuel dual-heat-storage low-NO X The nozzle is characterized in that: the device comprises a combustion chamber, a gas channel and a heat accumulating structure, wherein the combustion chamber is provided with a second fuel conveying pipe in the middle for introducing a second fuel into the combustion chamber;
the gas channels comprise gas channels and air channels, are independent from each other and are respectively communicated with the combustion chamber;
the heat storage structure comprises a plurality of rows and columns of heat storage honeycomb bodies and is arranged in the gas channel.
2. A dual fuel dual thermal storage low NO as claimed in claim 1 X The nozzle is characterized in that: the fuel delivery device also comprises a protection air pipe, wherein the length of the protection air pipe is matched with that of the fuel delivery pipe, and the protection air pipe is sleeved on the periphery of the fuel delivery pipe and is provided with a gap with the fuel delivery pipe; and a protection air inlet is arranged on the protection air pipe far away from the combustion chamber side.
3. The method as claimed in claim 1Is low in NO in dual-fuel dual-heat accumulation X The nozzle is characterized in that: and the gas channel and the air channel are provided with cabin doors matched with the positions of the internal heat storage structures.
4. A dual fuel dual thermal storage low NO as claimed in claim 2 X The nozzle is characterized in that: in the cavity, two sides of the fuel conveying pipe are respectively provided with a smoke discharging channel.
5. A dual fuel dual thermal storage low NO as claimed in claim 1 X The nozzle is characterized in that: the heat accumulating honeycomb body can be divided into a plurality of groups and arranged in the gas channel, support bricks are erected between adjacent groups, and two ends of each brick are inserted into the inner wall of the gas channel.
6. A dual fuel dual thermal storage low NO as claimed in claim 1 X The nozzle is characterized in that: the side wall of the combustion chamber is designed to be open at the contact position with the tail end nozzle of the fuel conveying pipe.
7. A dual fuel dual thermal storage low NO as claimed in claim 1 X The nozzle is characterized in that: the opening of the blast furnace gas channel is communicated with a blast furnace gas pipeline, and a flowmeter is arranged on the blast furnace gas pipeline; an air pipeline is introduced into the opening of the air channel; in addition, a fan is arranged at the opening of the air channel.
8. Dual-fuel dual-heat-storage low-NO X The burner burning control method is that the burners are arranged on two sides of the hearth in pairs, and the smoke exhaust channels of the two burners are respectively communicated with the middle hearth; the two blast furnace gas pipelines are communicated to a gas main pipeline, and a gas steering valve is arranged on the pipeline; the two air pipelines are communicated to an air main pipeline in the same way, and an air steering valve is arranged on the pipeline, and the method comprises the following steps:
step 1: after the combustion cavity is ignited, air and blast furnace gas are simultaneously introduced into the burner through two channels of one burner; simultaneously stopping introducing air and blast furnace gas into the channels of the burners at the opposite sides, and starting a fan to suck out the flue gas in the hearth from the gas channels at the opposite sides;
step 2: opening a gas steering valve and an air steering valve, and introducing air and blast furnace gas into the burner on the opposite side; stopping introducing air and blast furnace gas into the burnt burner, and starting a fan to suck out smoke in the hearth from a burnt burner channel; the two burners are switched between three minutes and one time to store heat for the honeycomb body and heat the hearth.
9. A dual fuel dual thermal storage low NO as claimed in claim 8 X The burner combustion control method is characterized in that: when the flow rate of blast furnace gas on the flowmeter is reduced, a second fuel is introduced into the burner through the fuel conveying pipe to maintain the set furnace temperature, so that the two fuels are mixed and combusted in any proportion.
10. A dual fuel dual thermal storage low NO as claimed in claim 9 X The burner combustion control method is characterized in that: the flow ratio of the heat accumulating wind to the protecting wind for the inlet amount of the second fuel is 7:3, a step of; and (3) adding air and smoke twice during combustion of the second fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310234751.9A CN116412399A (en) | 2023-03-13 | 2023-03-13 | Dual-fuel dual-heat-storage low-NO X Burner and combustion control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310234751.9A CN116412399A (en) | 2023-03-13 | 2023-03-13 | Dual-fuel dual-heat-storage low-NO X Burner and combustion control method |
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| Publication Number | Publication Date |
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| CN116412399A true CN116412399A (en) | 2023-07-11 |
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|---|---|---|---|
| CN202310234751.9A Pending CN116412399A (en) | 2023-03-13 | 2023-03-13 | Dual-fuel dual-heat-storage low-NO X Burner and combustion control method |
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| Country | Link |
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| CN (1) | CN116412399A (en) |
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- 2023-03-13 CN CN202310234751.9A patent/CN116412399A/en active Pending
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