CN213873741U - Three-fuel co-combustion rotary kiln combustor - Google Patents
Three-fuel co-combustion rotary kiln combustor Download PDFInfo
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- CN213873741U CN213873741U CN202022426665.2U CN202022426665U CN213873741U CN 213873741 U CN213873741 U CN 213873741U CN 202022426665 U CN202022426665 U CN 202022426665U CN 213873741 U CN213873741 U CN 213873741U
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Abstract
The utility model discloses a three fuel co-combustion rotary kiln combustor belongs to combustor technical field, the nozzle is by interior central buggy passageway, central wind passageway, blast furnace gas passageway, converter gas passageway, whirl wind passageway and axial compressor wind passageway of having set gradually outside to, all be provided with helical blade on the interior pipe wall that forms central buggy passageway, blast furnace gas passageway, converter gas passageway, whirl wind passageway and axial compressor wind passageway, and central buggy passageway, blast furnace gas passageway, converter gas passageway, whirl wind passageway and axial compressor wind passageway are opposite by the interior helical blade rotation direction who goes outside to in the passageway, the fuel eruption volume and the amount of wind of central wind passageway, whirl wind passageway and axial compressor wind passageway of buggy passageway, blast furnace gas passageway and converter gas passageway are controlled by combustor control system. The method is a three-fuel mixed combustion method, and the appropriate coal powder injection amount is selected according to the supply amounts of blast furnace gas and converter gas, so that the combustion amount required by the rotary kiln is ensured, and the smooth production is ensured.
Description
Technical Field
The utility model relates to a three fuel co-combustion rotary kiln combustors belongs to combustor technical field.
Background
The rotary kiln burner is an important process device of a firing system, not only affects the heat consumption and the operation performance of the kiln system, but also affects the quality of clinker and the discharge amount of harmful substances. The task of burner manufacturers has changed considerably during this technological development. In particular, the use of alternative fuels has a lasting effect on the design of the burner. The rotary kiln combustor is commonly a blast furnace gas and converter gas double-gas mixed combustor or a coal powder and gas double-fuel combustor, and the flow rate of the coal gas is rated flow rate: 13000-14000 Nm/h of converter gas; blast furnace gas 5000-6800 Nm/h, and in the in-service use process, company's converter coal gas supply receives steelmaking single converter/two converter production influence, and the coal gas volume ripples, and converter coal gas volume 5000-6000 Nm year/h when single stove production, and rotary kiln combustor flame supply heat is not enough, and the chain grate machine need reduce the quick-witted speed operation, and it is high to cause the chain grate machine loss of burning simultaneously to influence output, and life reduces, and the system is forced to shut down the heat preservation when serious.
Disclosure of Invention
The utility model aims at the above technical problem, a three fuel co-combustion rotary kiln combustor is provided, guarantees rotary kiln combustor flame supply heat, avoids the system shutdown, keeps production normal clear, and the system is carried out productively and is increased efficiency.
In order to achieve the purpose, the utility model adopts the technical proposal that,
the utility model provides a three fuel co-combustion rotary kiln combustors, includes the pipe assembly and the circular nozzle that links to each other with the pipe assembly, its characterized in that: the nozzle is sequentially provided with a central coal powder channel, a central air channel, a blast furnace gas channel, a converter gas channel, a rotational flow air channel and an axial flow air channel from inside to outside, the inner pipe walls forming the central coal powder channel, the blast furnace gas channel, the converter gas channel, the rotational flow air channel and the axial flow air channel are all provided with spiral blades, the rotating directions of the spiral blades in the central coal powder channel, the blast furnace gas channel, the converter gas channel, the rotational flow air channel and the axial flow air channel from inside to outside are opposite, and the fuel spraying amount of the coal powder channel, the blast furnace gas channel and the converter gas channel and the air volume of the central air channel, the rotational flow air channel and the axial flow air channel are controlled by a burner control system.
The utility model discloses technical scheme's further improvement lies in: the spiral angle of the spiral fan blade is 30-60 degrees.
The utility model discloses technical scheme's further improvement lies in: the pipeline assembly is provided with three gas conveying channels and three air channel conveying channels, the three gas conveying channels comprise a pulverized coal conveying channel, a blast furnace gas conveying channel and a converter gas conveying channel, and the three air channel conveying channels comprise a central air conveying channel, a rotational flow air conveying channel and an axial flow air conveying channel.
The utility model discloses technical scheme's further improvement lies in: the central air conveying channel is provided with a central air electric regulating valve, the rotational air conveying channel is provided with a rotational air electric regulating valve, the axial air conveying channel is provided with an axial air electric regulating valve, the central air conveying channel and the axial air conveying channel are provided with an air source by one variable frequency fan, and the rotational air conveying channel is provided with an air source by the other variable frequency fan.
The utility model discloses technical scheme's further improvement lies in: the electric regulating valve is an electric control butterfly valve.
Since the technical scheme is used, the utility model discloses the technological effect who gains does:
the method is a three-fuel mixed combustion method, wherein blast furnace gas and converter gas are used for mixed combustion at ordinary times, when the gas amount in a plant is insufficient, a combustor control system controls to open a pulverized coal gas channel, and a proper pulverized coal injection amount is selected according to the supply amounts of the blast furnace gas and the converter gas, so that the combustion amount required by a rotary kiln is ensured, and the smooth production is ensured; the arrangement of each air channel and the spiral fan blades arranged on the inner pipe walls of the central pulverized coal pipeline, the blast furnace gas inner cylinder, the converter gas inner cylinder and the cyclone air inner cylinder can disperse the pulverized coal to ensure that the fuel is more fully combusted.
The defect that the original single-fan air supply system can affect other air channels when independently adjusting swirl air and axial flow air is overcome, and the adjustment of external air and internal air can be completed in a combustor control system through fan frequency conversion, so that the flame adjustment range of a combustor is wider, the adaptability to fuel is stronger, and the kiln skin is smoother; because the three-air-duct double-frequency-conversion air supply systems are respectively and independently controlled, the stable combustion characteristic is enhanced, the ignition temperature is reduced, the ignition time and the ignition heat are reduced, the flame propagation speed is improved, the ignition mode is changed from multi-phase ignition to homogeneous ignition, and the NO is obviously reducedXThe amount of discharge of (c).
Drawings
FIG. 1 is a schematic structural view of a nozzle of the present invention;
FIG. 2 is a schematic view of the present invention conduit assembly;
the coal powder conveying device comprises a central coal powder channel 1, a central air channel 2, a central air channel 3, a blast furnace gas channel 4, a converter gas channel 5, a rotational flow air channel 6, an axial flow air channel 7, a converter gas conveying channel 8, a blast furnace gas conveying channel 9, a coal powder conveying channel 10, an axial flow air conveying channel 11, a rotational flow air conveying channel 12, a central wind electric regulating valve 13, an axial flow wind electric regulating valve 14 and a rotational flow wind electric regulating valve.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1, a three-fuel co-combustion rotary kiln burner comprises a pipe assembly and a circular nozzle connected with the pipe assembly, and is characterized in that:
the nozzle is sequentially provided with a central coal powder channel 1, a central air channel 2, a blast furnace gas channel 3, a converter gas channel 4, a rotational flow air channel 5 and an axial flow air channel 6 from inside to outside, the inner pipe walls of the central coal powder channel 1, the blast furnace gas channel 3, the converter gas channel 4, the rotational flow air channel 5 and the axial flow air channel 6 are all provided with helical blades, the rotating directions of the helical blades in the central coal powder channel 1, the blast furnace gas channel 3, the converter gas channel 4, the rotational flow air channel 5 and the axial flow air channel 6 from inside to outside are opposite, and the fuel spraying amount of the central coal powder channel 1, the blast furnace gas channel 3 and the converter gas channel 4 and the air amount of the central air channel 2, the rotational flow air channel 5 and the axial flow air channel 6 are controlled by a burner control system; the angle formed by the spiral fan blade and the central shaft is 30-60 degrees.
The pipeline assembly is provided with three gas conveying channels and three air channel conveying channels, the three gas conveying channels comprise a pulverized coal conveying channel 9, a blast furnace gas conveying channel 8 and a converter gas conveying channel 7, and the three air channel conveying channels comprise a central air conveying channel, a rotational flow air conveying channel 11 and an axial flow air conveying channel 10.
The central wind conveying channel is provided with a central wind electric regulating valve 12, the rotational wind conveying channel 11 is provided with a rotational wind electric regulating valve 13, the axial wind conveying channel 10 is provided with an axial wind electric regulating valve 14, the central wind conveying channel and the axial wind conveying channel 10 are provided with an air source by one variable frequency fan, and the rotational wind conveying channel 11 is provided with an air source by the other variable frequency fan.
The three air channels are separately controlled by two fans, and electric adjusting butterfly valves are arranged on the air channels; the shortcoming that original single fan air supply system all can influence other wind channels when adjusting whirl wind and axial-flow wind alone is changed, and the regulation of outer wind, interior wind all can be accomplished through the fan frequency conversion in well accuse for the scope that combustor flame adjusted is bigger, and is stronger to the adaptability of fuel, makes the kiln skin more level and more smooth simultaneously.
The injection amount of the pulverized coal, the blast furnace gas and the converter gas in the pulverized coal channel is quantitatively regulated by a burner control system, and proper pulverized coal injection amount is selected according to the supply amount of the blast furnace gas and the converter gas to supplement the combustion amount required by the rotary kiln, so that the smooth production is ensured; the arrangement of each air channel and the spiral fan blades arranged on the inner pipe walls of the central pulverized coal pipeline, the blast furnace gas inner cylinder, the converter gas inner cylinder and the cyclone air inner cylinder can disperse the pulverized coal to ensure that the fuel is more fully combusted.
Claims (5)
1. The utility model provides a three fuel co-combustion rotary kiln combustors, includes the pipe assembly and the circular nozzle that links to each other with the pipe assembly, its characterized in that: the nozzle is sequentially provided with a central coal powder channel (1), a central air channel (2), a blast furnace gas channel (3), a converter gas channel (4), a rotational flow air channel (5) and an axial flow air channel (6) from inside to outside to form the central coal powder channel (1), the blast furnace gas channel (3), the converter gas channel (4), the rotational flow air channel (5) and the axial flow air channel (6), wherein the inner pipe walls of the central coal powder channel (1), the blast furnace gas channel (3), the converter gas channel (4), the rotational flow air channel (5) and the axial flow air channel (6) are all provided with helical blades, and the rotational directions of the helical blades in the central coal powder channel (1), the blast furnace gas channel (3), the converter gas channel (4), the rotational flow air channel (5) and the axial flow air channel (6) are opposite from inside to outside, the fuel spraying amount of the central coal powder channel (1), the blast furnace gas channel (3) and the converter gas channel (4) and the air volume of the central air channel (2), the rotational flow air channel (5) and the axial flow air channel (6) are controlled by a burner control system.
2. The burner of claim 1, wherein: the spiral angle of the spiral fan blade is 30-60 degrees.
3. The burner of claim 1, wherein: the pipeline assembly is provided with three gas conveying channels and three air channel conveying channels, the three gas conveying channels comprise a coal powder conveying channel (9), a blast furnace gas conveying channel (8) and a converter gas conveying channel (7), and the three air channel conveying channels comprise a central air conveying channel, a rotational flow air conveying channel (11) and an axial flow air conveying channel (10).
4. A three-fuel co-combustion rotary kiln burner as claimed in claim 3, wherein: the central wind conveying channel is provided with a central wind electric regulating valve (12), the rotational wind conveying channel (11) is provided with a rotational wind electric regulating valve (13), the axial wind conveying channel (10) is provided with an axial wind electric regulating valve (14), the central wind conveying channel and the axial wind conveying channel (10) are provided with an air source by one variable frequency fan, and the rotational wind conveying channel (11) is provided with an air source by the other variable frequency fan.
5. The burner of claim 4, wherein: the electric regulating valve is an electric control butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022426665.2U CN213873741U (en) | 2020-10-28 | 2020-10-28 | Three-fuel co-combustion rotary kiln combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022426665.2U CN213873741U (en) | 2020-10-28 | 2020-10-28 | Three-fuel co-combustion rotary kiln combustor |
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| Publication Number | Publication Date |
|---|---|
| CN213873741U true CN213873741U (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022426665.2U Active CN213873741U (en) | 2020-10-28 | 2020-10-28 | Three-fuel co-combustion rotary kiln combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213873741U (en) |
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2020
- 2020-10-28 CN CN202022426665.2U patent/CN213873741U/en active Active
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