CN213686819U - I-type self-preheating burner with grading function - Google Patents
I-type self-preheating burner with grading function Download PDFInfo
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- CN213686819U CN213686819U CN202022416388.7U CN202022416388U CN213686819U CN 213686819 U CN213686819 U CN 213686819U CN 202022416388 U CN202022416388 U CN 202022416388U CN 213686819 U CN213686819 U CN 213686819U
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- heat exchange
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 56
- 239000000779 smoke Substances 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims description 30
- 239000003034 coal gas Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 10
- 238000010304 firing Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 238000004512 die casting Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 11
- 238000000137 annealing Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 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
Abstract
The utility model discloses a I type self-preheating burner with grading function, the heat exchange tube is sheathed on the inner tube, the head end of the heat exchange tube is distributed with spray holes and a tail end opening, the head end of the inner tube is connected to the inner side of the head end of the heat exchange tube in a sealed way, the tail end is sealed, the grading ring is sheathed on the inner tube in a sliding way, the head end is positioned in the annular space between the tail end of the heat exchange tube and the inner tube, the operating part at the tail end is hermetically extended out of the shell, the combustion chamber is positioned in the head end of the inner tube and penetrates out of the heat exchange tube in a sealed way, the central tube is hermetically extended into the inner tube to the head end of the combustion chamber, the grading tube is sheathed on the; the shell is provided with a gas inlet, an air inlet and a smoke outlet, the gas inlet is communicated to an annular space between the tail end of the grading pipe and the central pipe, and a communication hole is formed in the side surface near the tail end of the inner pipe. The burner realizes the staged combustion in a high-temperature mode and a low-temperature mode, and reduces the generation of NOx.
Description
Technical Field
The invention relates to a burner, in particular to an I-type self-preheating burner with a grading function.
Background
The flame that I type self-preheated nozzle spun is the sub-high speed flame of direct flame, compares with general direct flame nozzle, has that flame stability is good, the rigidity is good, flame speed is high, strong vortex, work piece heating advantage such as fast, in the ferrous metallurgy trade, annealing stove, platform truck stove, normalizing furnace and the heat treatment furnace side of conventional combustion mode are arranged this nozzle, this type nozzle power range is big, generally in 20~200kw within range, can adopt naked light heating and radiant tube indirect heating technique.
With the stricter and stricter requirements on environmental protection, the existing I-type self-preheating burner can not meet the requirements of environmental protection on NOx emission, especially the space in an I-type radiant tube is limited, and the technical difficulty in reducing the NOx emission is increased.
Disclosure of Invention
The invention aims to provide an I-type self-preheating burner with a grading function, which realizes grading combustion in a high-temperature mode and a low-temperature mode, is fast in heating and stable in flame, and reduces the generation of NOx.
The technical scheme adopted by the invention is as follows:
an I-type self-preheating burner with a grading function comprises a shell, a heat exchange cylinder, an inner pipe, a grading ring, a combustion chamber, a central pipe, a grading pipe and a sparking electrode; the heat exchange cylinder is sleeved on the inner pipe, the head end of the heat exchange cylinder is closed and is provided with spray holes which are deviated to the axis forward, the tail end of the heat exchange cylinder is opened and is hermetically installed on the shell, the head end of the inner pipe is hermetically connected to the inner side of the head end of the heat exchange cylinder, the tail end of the inner pipe is hermetically installed on the shell, the grading ring is slidably sleeved on the inner pipe, the head end of the inner pipe is positioned in an annular space between the tail end of the heat exchange cylinder and the inner pipe, an operating part at the tail end of the inner pipe is hermetically extended out of the shell, the combustion chamber with two openings at two ends is positioned in the head end of the inner pipe, the head end of the central pipe penetrates through the shell in a sealing manner and then enters the combustion chamber; the shell is provided with a gas inlet, an air inlet and a smoke outlet, the gas inlet is communicated to an annular space between the tail end of the grading pipe and the central pipe, a communication hole is formed in the side surface near the tail end of the inner pipe, the operation part drives the grading ring to slide forwards to a proper position and then blocks an opening at the tail end of the heat exchange cylinder, the gas inlet is only communicated with the communication hole, the operation part drives the grading ring to slide backwards to a proper position and then blocks the communication hole, the gas inlet is only communicated with the opening at the tail end of the heat exchange; the tail end of the central pipe, the gas inlet, the air inlet and the smoke outlet are respectively externally connected with a secondary gas pipe, a primary gas pipe, an air pipe and a smoke exhaust pipe.
Further, the shell comprises an air shell and a gas shell; the tail end of the heat exchange cylinder is connected to the ring plate in a sealing mode through a flange, the inner pipe penetrates through the ring plate, the tail end of the heat exchange cylinder is installed at the tail end of the gas shell in a sealing mode through the flange, the head end of the grading ring is located in the annular space between the ring plate and the inner pipe, and an operation part at the tail end of the grading ring is located in the annular space between the ring plate and the inner pipe and stretches out of a flange at the tail end of the inner pipe in a sealing mode; the gas shell is provided with a central pipe channel and a sparking electrode channel, a gas inlet is positioned on the side surface of the gas shell and is communicated with the central pipe channel, the head end of the gas shell is hermetically installed on an inner pipe tail end flange through a flange, a grading pipe tail end is hermetically installed on the central pipe channel, the central pipe is hermetically passed through the central pipe channel, and the sparking electrode is hermetically passed through the sparking electrode channel.
Further, an air pressure taking air tap and a coal gas pressure taking air tap are respectively arranged on the air shell and the coal gas shell, the air pressure taking air tap and the coal gas pressure taking air tap are respectively communicated with the air inlet and the coal gas inlet, and air pressure detection pieces are respectively connected to the air pressure taking air tap and the coal gas pressure taking air tap.
Further, the air shell is formed by precision die-casting of cast aluminum.
Furthermore, an air distribution plate is arranged in the combustion chamber, a through central hole is formed in the air distribution plate, air distribution holes are distributed in the side wall of the air distribution plate, the tail end of each air distribution hole is communicated with the central hole, the head end of each air distribution hole is forward and deviates from the central hole, the central pipe penetrates through the central hole in a sealing mode, and the head end of the classification pipe is connected to the tail end of the central hole in a sealing mode.
Furthermore, ceramic nails are distributed on the side wall of the combustion chamber, the ceramic nails hermetically extend into the combustion chamber, and the air distribution plate is axially limited by the ceramic nails and the grading pipes.
Further, the air distribution plate is cast and molded by Cr28Ni48W 5.
Furthermore, a supporting tube and a spring are sleeved on the grading tube, the spring is compressed between the tail end of the supporting tube and the shell, the head end of the supporting tube is tightly pressed at the tail end of the combustion chamber, and a sleeve for passing through the ignition electrode is arranged on the outer side of the supporting tube.
Furthermore, both ends of the combustion chamber are cylindrical cylinders, the top end of the combustion chamber is narrower than the tail end of the combustion chamber, and the middle of the combustion chamber is a transitional conical cylinder.
Further, the combustion chamber is formed by firing silicon carbide.
The invention has the beneficial effects that:
when the burner works, the whole burner is installed in a radiant tube or on a furnace shell through a shell, the burner realizes staged combustion in a high-temperature mode and a low-temperature mode, and realizes the conversion from premixed combustion to a diffusion combustion mode, namely in the low-temperature mode in the furnace, a secondary gas tube is closed, a primary gas tube and an air tube are opened, an operating part drives a staged ring to slide forward to block an opening at the tail end of a heat exchange cylinder, a gas inlet is only communicated with a communicating hole, gas enters an annular space between the staged tube and a central tube from the gas inlet and then enters a combustion chamber, air enters an inner tube through the air inlet and the communicating hole and then enters the combustion chamber, and the gas and the air are mixed and combusted in the combustion chamber through a firing electrode to form stable flame, the heating is fast, and the oxidation of; under the high temperature mode in the stove, secondary gas pipe and air hose are opened, and primary gas pipe is closed, and operating unit drives hierarchical ring and slides backward to put in place and blocks up the intercommunicating pore, and the coal gas import only communicates with heat transfer cylinder tail end opening, and coal gas is spout the nozzle outside from the center tube, and air gets into the annular space of heat transfer cylinder and inner tube through the air intlet, and rethread orifice blowout nozzle outside, and coal gas and air reduce the local high temperature of flame, reduce NOx and generate at nozzle outside diffusion burning.
The burner has a large power adjusting range, can realize the heating capacity of 20-200 kw for burners with different specifications, and can be widely applied to the fields of metallurgical quenching, annealing and heat treatment.
The burner adopts a modular design, and is very simple and convenient to use, maintain and reform a system.
Drawings
FIG. 1 is a schematic structural diagram of a type I self-preheating burner with a grading function in an embodiment of the invention.
FIG. 2 is a side view of an installed type I self-preheating burner with staging functionality in an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a gas housing in an embodiment of the invention.
Figure 4 is a top view of a gas housing in an embodiment of the invention.
FIG. 5 is a schematic view of the assembly of the center tube, gas housing, staging tube, sleeve, combustion chamber and air distributor plate in an embodiment of the invention.
Fig. 6 is a longitudinal sectional view of an air casing in the embodiment of the present invention.
Figure 7 is a cross-sectional view of an air shell in an embodiment of the present invention.
FIG. 8 is a schematic view of the assembly of the air shell, heat exchange cartridge, inner tube and staging ring in an embodiment of the present invention.
In the figure: 1-spraying a hole; 2-a combustion chamber; 3-air distribution plate; 4-a heat exchange cylinder; 5-supporting the tube; 6-a grading pipe; 7-a fin; 8-inner tube; 9-smoke exhaust pipe; 10-a valve; 11-primary gas pipe; 12-a sparking electrode; 13-gas shell; 14-a central tube; 15-communicating holes; 16-a grading ring; 17-an operating member; 18-an air housing; 19-an air tube; 20-air distribution holes; 21-ceramic nail; 22-air pressure tapping nozzle; 23-a gas pressure tapping nozzle; 24-gas inlet; 25-a firing electrode channel; 26-a central tube channel; 27-a spring; 28-a cannula; 29-air inlet; 30-incomplete annulus; 31-ring plate; 32-a smoke outlet; 33-secondary gas pipe.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1 to 8, an I-type self-preheating burner with a grading function comprises a shell, a heat exchange cylinder 4, an inner pipe 8, a grading ring 16, a combustion chamber 2, a central pipe 14, a grading pipe 6 and a firing electrode 12; the heat exchange cylinder 4 is sleeved on the inner tube 8, the head end of the heat exchange cylinder 4 is closed and is distributed with a spray hole 1 which is deviated to the axis forward, the tail end is opened and is hermetically installed on the shell, the head end of the inner tube 8 is hermetically connected to the inner side of the head end of the heat exchange cylinder 4, the tail end is hermetically installed on the shell, the grading ring 16 is slidably sleeved on the inner tube 8, the head end is positioned in the annular space between the tail end of the heat exchange cylinder 4 and the inner tube 8, the operating part 17 at the tail end is hermetically extended out of the shell, the combustion chamber 2 with two open ends is positioned in the head end of the inner tube 8, the head end penetrates through the heat exchange cylinder 4 in a sealing manner, the central tube 14 penetrates through the shell in a sealing manner, extends into the combustion chamber 2 and extends to the head end of the combustion chamber 2, the grading tube 6; the shell is provided with a gas inlet 24, an air inlet 29 and a smoke vent 32, the gas inlet 24 is communicated with an annular space between the tail end of the grading pipe 6 and the central pipe 14, a communicating hole 15 is arranged on the side surface near the tail end of the inner pipe 8, the operating part 17 drives the grading ring 16 to slide forward to a proper position to block an opening at the tail end of the heat exchange cylinder 4, the gas inlet 24 is communicated with the communicating hole 15 only, the operating part 17 drives the grading ring 16 to slide backward to a proper position to block the communicating hole 15, the gas inlet 24 is communicated with an opening at the tail end of the heat exchange cylinder 4 only, and; the tail end of the central pipe 14, the coal gas inlet 24, the air inlet 29 and the smoke outlet 32 are externally connected with a secondary coal gas pipe 33, a primary coal gas pipe 11, an air pipe 19 and a smoke exhaust pipe 9 respectively.
As shown in fig. 1 to 4, 6 and 7, in the present embodiment, the housing includes an air housing 18 and a gas housing 13; the annular plate 31 and the incomplete annular 30 are arranged in the air shell 18, the head end of the incomplete annular 30 is sealed, the tail end of the incomplete annular 30 is communicated with the tail end opening of the air shell 18, the tail end of the air shell 18, the annular plate 31 and the head end are communicated, the air inlet 29 is positioned on the side surface of the air shell 18 and is communicated with the incomplete annular 30, the smoke exhaust port 32 is positioned on the side surface of the air shell 18 and avoids the incomplete annular 30, the smoke exhaust port is directly communicated with the head end opening of the air shell 18, the tail end of the heat exchange cylinder 4 is hermetically connected to the annular plate 31 through a flange, the inner pipe 8 penetrates through the annular plate 31, the tail end of the inner pipe 8 is hermetically installed at the tail end of the gas shell 13 through the flange; the gas shell 13 is provided with a central pipe channel 26 and a sparking electrode channel 25, a gas inlet 24 is positioned on the side surface of the gas shell 13 and is communicated with the central pipe channel 26, the head end of the gas shell 24 is hermetically arranged on a flange at the tail end of the inner pipe 8 through a flange, the tail end of the grading pipe 6 is hermetically arranged on the central pipe channel 26, the central pipe 14 is hermetically arranged through the central pipe channel 26, and the sparking electrode 12 is hermetically arranged through the sparking electrode channel 25.
As shown in fig. 2 to 4, in the present embodiment, the air shell 18 and the gas shell 13 are respectively provided with an air pressure taking nozzle 22 and a gas pressure taking nozzle 23, the air pressure taking nozzle 22 and the gas pressure taking nozzle 23 are respectively communicated with the air inlet 29 and the gas inlet 24, and the air pressure taking nozzle 222 and the gas pressure taking nozzle 23 are both connected with an air pressure detecting member.
As shown in fig. 1 and 5, in the present embodiment, an air distribution plate 3 is disposed in the combustion chamber 2, a through central hole is disposed on the air distribution plate 3, air distribution holes 20 are distributed on the side wall, the tail end of the air distribution hole 20 is communicated with the central hole, the head end of the air distribution hole is forward and deviates from the central hole, the central pipe 14 penetrates through the central hole in a sealing manner, and the head end of the classifying pipe 6 is connected to the tail end of the central hole in a sealing manner.
As shown in fig. 1 and 5, in the present embodiment, ceramic nails 21 are distributed on the side wall of the combustion chamber 2, the ceramic nails 21 hermetically extend into the combustion chamber 2, and the air distribution plate 3 is axially limited by the ceramic nails 21 and the classifying pipe 6.
As shown in fig. 1 and 5, in the present embodiment, the classifying tube 6 is sleeved with a support tube 5 and a spring 27, the spring 27 is compressed between the tail end of the support tube 5 and the casing, the head end of the support tube 5 is pressed against the tail end of the combustion chamber 2, and a sleeve 28 for passing the ignition electrode 12 is provided outside the support tube 5.
As shown in fig. 1 and 5, in the present embodiment, the combustion chamber 2 has cylindrical cylinders at both ends, a narrower top end than a tail end, and a transitional conical cylinder in the middle.
As shown in fig. 1, in the present embodiment, the secondary gas pipe 33, the primary gas pipe 11, the air pipe 19, and the smoke exhaust pipe 9 are provided with valves 10. The valve 10 can adjust the air and gas flow and the proportion to achieve a more ideal combustion effect.
In the embodiment, the combustion chamber 2 is formed by firing silicon carbide, the combustion chamber 2 can continuously use 1380 ℃ and has a highest temperature of 1650 ℃, the opening size of the inner cavity at the tail end of the combustion chamber 2 is determined by the power of a burner and fuel components, and the size of the inner cavity at the head end is determined by the power of the burner, the outer diameter of the air distribution plate 3, the number of air distribution holes 20 and the area; the air distribution plate 3 is formed by casting Cr28Ni48W5, is subjected to fine processing and forming, is not oxidized at 1180 ℃ all the year round, and has the continuous use temperature of 1250 ℃ and the maximum temperature of 1350 ℃. The diameter and the number of the air distribution holes 20 are determined by calculation according to the burner power and the necessary conditions for flame formation, and the diameter of the classifying pipe 6 is determined by the burner power and the fuel components; the air housing 18 is precision die cast from an aluminum casting.
As shown in fig. 3 and 4, in the present embodiment, the head end of the gas shell 13 is a circular flange, and the side surface of the gas shell is butted with the primary gas pipe 11 at a square flange position; as shown in fig. 6 and 7, in the present embodiment, the side of the air casing 18 is butted against the air pipe 19 and the smoke exhaust pipe 9 at the mounting flange, the rear end is square flange, and the top end is round flange.
In this embodiment, the communicating holes 15 are rectangular holes and are uniformly distributed around the axis, the spraying holes are uniformly distributed around the axis, and the air distribution holes 20 are uniformly distributed around the axis; the head end of the inner pipe 8 is welded with the inner side of the head end of the heat exchange cylinder 4, and the grading pipe 6 is welded with the air distribution plate 3; a plurality of fins 7 are arranged on the inner side and the outer side of the middle section of the heat exchange cylinder 4.
In the embodiment, the ignition electrode 12 is electrically connected with a high-voltage package and a detection device, the high-voltage package is electrically connected with a controller through a solenoid valve, the detection device is electrically connected with the controller, and when the controller receives an ignition command, the high-voltage package is controlled to discharge to ignite the electrode.
When the burner works, the whole burner is installed in a radiant tube or on a furnace shell through a shell, the burner realizes staged combustion in a high-temperature mode and a low-temperature mode, and realizes the conversion from premixed combustion to diffusion combustion, namely in the low-temperature mode in the furnace, a secondary gas tube 33 is closed, a primary gas tube 11 and an air tube 19 are opened, an operating part 17 drives a staging ring 16 to slide forward to a position to block an opening at the tail end of a heat exchange cylinder 4, a gas inlet 24 is only communicated with a communication hole 15, gas enters an annular space between the staging tube 6 and a central tube 14 from the gas inlet 24 and then enters a combustion chamber 2, air enters an inner tube 8 through an air inlet 29 and the communication hole 15 and then enters the combustion chamber 2, the gas and the air are mixed and combusted in the combustion chamber 2 through a sparking electrode 12 to form stable flame, the heating is fast, and the oxidation of; in a high-temperature mode in the furnace, the secondary gas pipe 33 and the air pipe 19 are opened, the primary gas pipe 11 is closed, the operating part 17 drives the grading ring 16 to slide backwards to block the communicating hole 15, the gas inlet 24 is only communicated with the opening at the tail end of the heat exchange cylinder 4, gas is sprayed out of the burner from the central pipe 14, air enters the annular space between the heat exchange cylinder 4 and the inner pipe 8 through the air inlet 29 and is sprayed out of the burner through the spray hole 1, the gas and the air are diffused and combusted outside the burner, the local high temperature of flame is reduced, and the generation of NOx is reduced. The burner has a large power adjusting range, can realize the heating capacity of 20-200 kw for burners with different specifications, and can be widely applied to the fields of metallurgical quenching, annealing and heat treatment. The burner adopts a modular design, and is very simple and convenient to use, maintain and reform a system.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a I type self-preheating burner with hierarchical function which characterized in that: comprises a shell, a heat exchange cylinder, an inner pipe, a grading ring, a combustion chamber, a central pipe, a grading pipe and a sparking electrode; the heat exchange cylinder is sleeved on the inner pipe, the head end of the heat exchange cylinder is closed and is provided with spray holes which are deviated to the axis forward, the tail end of the heat exchange cylinder is opened and is hermetically installed on the shell, the head end of the inner pipe is hermetically connected to the inner side of the head end of the heat exchange cylinder, the tail end of the inner pipe is hermetically installed on the shell, the grading ring is slidably sleeved on the inner pipe, the head end of the inner pipe is positioned in an annular space between the tail end of the heat exchange cylinder and the inner pipe, an operating part at the tail end of the inner pipe is hermetically extended out of the shell, the combustion chamber with two openings at two ends is positioned in the head end of the inner pipe, the head end of the central pipe penetrates through the shell in a sealing manner and then enters the combustion chamber; the shell is provided with a gas inlet, an air inlet and a smoke outlet, the gas inlet is communicated to an annular space between the tail end of the grading pipe and the central pipe, a communication hole is formed in the side surface near the tail end of the inner pipe, the operation part drives the grading ring to slide forwards to a proper position and then blocks an opening at the tail end of the heat exchange cylinder, the gas inlet is only communicated with the communication hole, the operation part drives the grading ring to slide backwards to a proper position and then blocks the communication hole, the gas inlet is only communicated with the opening at the tail end of the heat exchange; the tail end of the central pipe, the gas inlet, the air inlet and the smoke outlet are respectively externally connected with a secondary gas pipe, a primary gas pipe, an air pipe and a smoke exhaust pipe.
2. The type I self-preheating burner with staged function as defined in claim 1, wherein: the shell comprises an air shell and a coal gas shell; the tail end of the heat exchange cylinder is connected to the ring plate in a sealing mode through a flange, the inner pipe penetrates through the ring plate, the tail end of the heat exchange cylinder is installed at the tail end of the gas shell in a sealing mode through the flange, the head end of the grading ring is located in the annular space between the ring plate and the inner pipe, and an operation part at the tail end of the grading ring is located in the annular space between the ring plate and the inner pipe and stretches out of a flange at the tail end of the inner pipe in a sealing mode; the gas shell is provided with a central pipe channel and a sparking electrode channel, a gas inlet is positioned on the side surface of the gas shell and is communicated with the central pipe channel, the head end of the gas shell is hermetically installed on an inner pipe tail end flange through a flange, a grading pipe tail end is hermetically installed on the central pipe channel, the central pipe is hermetically passed through the central pipe channel, and the sparking electrode is hermetically passed through the sparking electrode channel.
3. The type I self-preheating burner with a staged function as claimed in claim 2, wherein: the air shell and the coal gas shell are respectively provided with an air pressure taking air tap and a coal gas pressure taking air tap, the air pressure taking air tap and the coal gas pressure taking air tap are respectively communicated with the air inlet and the coal gas inlet, and the air pressure taking air tap and the coal gas pressure taking air tap are both connected with air pressure detection pieces.
4. The type I self-preheating burner with a staged function as claimed in claim 2, wherein: the air shell is formed by precision die-casting of an aluminum casting.
5. The type I self-preheating burner with staged function as defined in claim 1, wherein: an air distribution plate is arranged in the combustion chamber, a through central hole is formed in the air distribution plate, air distribution holes are distributed in the side wall of the air distribution plate, the tail end of each air distribution hole is communicated with the central hole, the head end of each air distribution hole is forward and deviates from the central hole, the central pipe penetrates through the central hole in a sealing mode, and the head end of the grading pipe is connected to the tail end of the central hole in a sealing.
6. The type I self-preheating burner with a staged function as recited in claim 5, wherein: ceramic nails are distributed on the side wall of the combustion chamber, the ceramic nails hermetically extend into the combustion chamber, and the air distribution plate is axially limited by the ceramic nails and the grading pipe.
7. The type I self-preheating burner with a staged function as recited in claim 5, wherein: the air distribution plate is cast and molded by Cr28Ni48W 5.
8. The type I self-preheating burner having a staged function as claimed in any one of claims 1 to 7, wherein: the grading pipe is sleeved with a supporting pipe and a spring, the spring is compressed between the tail end of the supporting pipe and the shell, the head end of the supporting pipe is pressed against the tail end of the combustion chamber, and a sleeve for passing through a sparking electrode is arranged on the outer side of the supporting pipe.
9. The type I self-preheating burner having a staged function as claimed in any one of claims 1 to 7, wherein: the two ends of the combustion chamber are both cylindrical cylinders, the top end of the combustion chamber is narrower than the tail end of the combustion chamber, and the middle of the combustion chamber is a transitional conical cylinder.
10. The type I self-preheating burner having a staged function as claimed in any one of claims 1 to 7, wherein: the combustion chamber is formed by firing silicon carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022416388.7U CN213686819U (en) | 2020-10-27 | 2020-10-27 | I-type self-preheating burner with grading function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022416388.7U CN213686819U (en) | 2020-10-27 | 2020-10-27 | I-type self-preheating burner with grading function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213686819U true CN213686819U (en) | 2021-07-13 |
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ID=76762827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022416388.7U Active CN213686819U (en) | 2020-10-27 | 2020-10-27 | I-type self-preheating burner with grading function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213686819U (en) |
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2020
- 2020-10-27 CN CN202022416388.7U patent/CN213686819U/en active Active
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