CN109578989B - Low-nitrogen vertical pulverized coal combustion furnace - Google Patents
Low-nitrogen vertical pulverized coal combustion furnace Download PDFInfo
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- CN109578989B CN109578989B CN201910044294.0A CN201910044294A CN109578989B CN 109578989 B CN109578989 B CN 109578989B CN 201910044294 A CN201910044294 A CN 201910044294A CN 109578989 B CN109578989 B CN 109578989B
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 225
- 239000003245 coal Substances 0.000 title claims abstract description 65
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 16
- 239000000295 fuel oil Substances 0.000 claims abstract description 10
- 238000009423 ventilation Methods 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 238000004880 explosion Methods 0.000 claims 1
- 239000002817 coal dust Substances 0.000 abstract description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 239000000446 fuel Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010883 coal ash Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/10—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air liquid and pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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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 discloses a low-nitrogen vertical pulverized coal combustion furnace, which comprises a combustion furnace shell, wherein a top burner is arranged above the combustion furnace shell, the combustion furnace shell is fixedly connected with the top burner through a top burner fixing seat, a combustion furnace oil inlet pipe and a coal furnace feeding pipe are arranged above the top burner, primary air inlet pipes are respectively arranged at two sides of the top burner, an exhaust explosion-proof chimney is arranged at one side above the combustion furnace shell, a secondary air inlet pipe is arranged at the other side above the combustion furnace shell, tertiary air inlet pipes are respectively arranged at two sides of the combustion furnace shell, a circulating air inlet pipe is arranged below the tertiary air inlet pipes, and a combustion furnace porous inner barrel is arranged inside the combustion furnace shell. The invention reduces the pollution emission of the combustion furnace during operation, saves the consumption of electric energy, and simultaneously ensures that the coal dust is fully combusted, thereby reducing the consumption of the coal dust by about ten percent to twenty percent.
Description
Technical Field
The invention relates to the technical field of pulverized coal combustion furnace devices, in particular to a low-nitrogen vertical pulverized coal combustion furnace.
Background
The pulverized coal combustion furnace is pulverized coal manufactured by combustion and grinding, a hot air source is generated, the industrial production requirement is met, and the pulverized coal combustion furnace is boiler equipment using pulverized coal as fuel. The method has the advantages of quick and complete combustion, large capacity, high efficiency, wide adaptability to coal types, convenience in control and adjustment and the like. The coal powder furnace is characterized in that fuel enters a combustion chamber along with air and burns in a suspension state. The pulverized coal boiler consists of a hearth, a burner, an ignition device and the like, wherein the hearth of the pulverized coal boiler is a place where fuel is combusted. The furnace is required to ensure complete combustion of fuel and reasonably organize heat exchange in the furnace, proper heating surfaces are arranged to meet the requirement of boiler capacity, and the burner is main combustion equipment of the pulverized coal boiler.
At present, the pulverized coal combustion furnace has low pulverized coal combustion efficiency, the nozzle of the pulverized coal burner is easy to coke, high-temperature nitrogen oxides generated by combustion are more, and the exhaust emission does not reach the standard; meanwhile, the use amount of the castable is large, the cost is increased, and the local falling-off phenomenon of the castable is easy to occur in normal use; in the whole process system, the heat in the waste heat and the waste gas cannot be reused, so that the heat source is wasted. In the field installation layout, the occupied space is large, and the equipment installation cost is high, so that the market is urgently required to develop a low-nitrogen vertical pulverized coal burner to help people solve the existing problems.
Disclosure of Invention
The invention aims to provide a low-nitrogen vertical pulverized coal combustion furnace, which aims to solve the problems that pulverized coal combustion efficiency is low, a nozzle of a pulverized coal burner is easy to coke, high-temperature nitrogen oxides generated by combustion are more, and waste gas emission does not reach standards in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a low nitrogen vertical pulverized coal burner, includes the burning furnace casing, the top of burning furnace casing is provided with the top combustor, and through top combustor fixing base fixed connection between burning furnace casing and the top combustor, the top of top combustor is provided with burning furnace inlet tube and coal stove inlet tube, and the coal stove inlet tube is provided with two, and the burning furnace inlet tube is located between the coal stove inlet tube, the both sides of top combustor are provided with the primary air-supply line respectively, and primary air-supply line and top combustor welded connection, one side of burning furnace casing top is provided with the explosion-proof chimney of exhaust, the opposite side of burning furnace casing top is provided with the secondary air-supply line, the both sides of burning furnace casing are provided with the tertiary air-supply line respectively, and symmetrical about the vertical central line of burning furnace casing between the tertiary air-supply line, the below of tertiary air-supply line is provided with the circulating air-supply line, the below of burning furnace casing is provided with the burning furnace supporting seat, the inner wall of burning furnace porous inner tube of burning furnace supports the lug, and the inside of burning furnace porous inner tube of burning furnace support between the burning furnace casing and the burning furnace casing is the inside of a body, the inside of the burning furnace casing is provided with the porous structure of burning furnace.
Preferably, the tertiary air inlet pipe is welded with the combustion furnace shell.
Preferably, a combustion furnace exhaust pipe is arranged at the lower end of the combustion furnace shell, and the lower end of the combustion furnace exhaust pipe penetrates through and extends to the outside of the combustion furnace supporting seat.
Preferably, a combustion furnace anti-skid pad is arranged below the outer wall of the combustion furnace shell, and the lower end surface of the combustion furnace anti-skid pad is attached to the upper end surface of the combustion furnace supporting seat.
Preferably, a hot air discharge elbow is arranged below the combustion furnace exhaust pipe, and the hot air discharge elbow is in threaded sealing connection with the combustion furnace exhaust pipe.
Preferably, the porous inner cylinder of the combustion furnace comprises a sealed cylinder shell, a ventilation cylinder shell, a circulating ventilation hole, a hanging ring of the porous inner cylinder of the combustion furnace, a coal chute and a supporting convex block groove, and one end of the supporting convex block of the porous inner cylinder of the combustion furnace extends to the inside of the supporting convex block groove.
Preferably, the sealed shell is located the top of ventilation shell, and ventilation shell and sealed shell structure as an organic whole, the porous inner tube link of burning furnace is located the top of sealed shell, and sealed shell and the porous inner tube link welded connection of burning furnace, the inside of sealed shell, ventilation shell and the porous inner tube link of burning furnace is provided with the coal silo, the support lug groove is located the both sides of the porous inner tube link lower extreme of burning furnace, and the vertical central line symmetry about the porous inner tube link of burning furnace between the support lug groove.
The combustion furnace shell comprises a combustion furnace self-cleaning layer, a combustion furnace anticorrosive layer, a combustion furnace fixing layer, a combustion furnace heat insulation layer, a combustion furnace heat-resistant layer and a combustion furnace antirust layer, wherein the combustion furnace self-cleaning layer is positioned on the outer surface of the combustion furnace shell, and the combustion furnace antirust layer is positioned on the inner surface of the combustion furnace shell.
Preferably, the combustion furnace anti-corrosion layer is positioned in the combustion furnace self-cleaning layer, the combustion furnace fixing layer is positioned in the combustion furnace anti-corrosion layer, the combustion furnace heat-resistant layer is positioned in the combustion furnace fixing layer, the combustion furnace heat-insulating layer is positioned between the combustion furnace fixing layer and the combustion furnace heat-resistant layer, and the combustion furnace anti-rust layer is positioned in the combustion furnace heat-resistant layer.
Preferably, the circulating air inlet pipe is welded with the combustion furnace shell, the top burner is welded with the primary air inlet pipe, and the combustion furnace oil inlet pipe, the coal furnace inlet pipe and the top burner are in threaded sealing connection.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, a reducing atmosphere is formed in the top burner area of the combustion furnace, the generated NOx is converted into N2, the concentration of NOx in the decomposing furnace is reduced, meanwhile, the system power consumption is reduced by three to six kWh/t, the pollution emission during the operation of the combustion furnace is reduced, the consumption of electric energy is saved, the energy conservation and environmental protection during the industrial production are realized, and the problems that the nozzle of the pulverized coal burner is easy to coke, the high-temperature nitrogen oxides generated by combustion are more, and the exhaust emission does not reach the standard are solved.
2. The invention ensures that coal dust is fully combusted through the arrangement of the primary air inlet pipe, the secondary air inlet pipe, the tertiary air inlet pipe and the circulating air inlet pipe, thereby reducing the coal dust consumption by about ten percent to twenty percent, saving the coal dust consumption cost during production, and simultaneously having simple flow and easy operation.
3. The pulverized coal ash generated by combustion is completely utilized and is taken away and discharged along with hot air, so that the pulverized coal ash is used as an auxiliary raw material for other workshop production, the energy-saving and environment-friendly effects are achieved, and the problems that the heat in waste heat and waste gas cannot be reused in the whole process system, and the heat source is wasted are solved.
Drawings
FIG. 1 is an overall front view of a low-nitrogen vertical pulverized coal burner of the present invention;
FIG. 2 is a schematic view of the structure of the burner housing of the present invention;
FIG. 3 is a perspective view of the porous inner barrel of the burner of the present invention;
fig. 4 is an enlarged partial view of the area a of the present invention.
In the figure: 1. a combustion furnace housing; 2. a top burner; 3. a primary air inlet pipe; 4. an oil inlet pipe of the combustion furnace; 5. coal stove feeding pipe; 6. a top burner mount; 7. an exhaust explosion-proof chimney; 8. a secondary air inlet pipe; 9. a tertiary air inlet pipe; 10. a circulating air inlet pipe; 11. a hot air discharge elbow; 12. a combustion furnace supporting seat; 13. supporting lugs of the porous inner cylinder of the combustion furnace; 14. a porous inner cylinder of the combustion furnace; 15. sealing the cartridge housing; 16. a ventilation cartridge housing; 17. a circulating ventilation hole; 18. a porous inner cylinder hanging ring of the combustion furnace; 19. a coal chute; 20. a supporting projection groove; 21. a self-cleaning layer of the combustion furnace; 22. a burner anticorrosive layer; 23. a combustion furnace fixing layer; 24. a combustion furnace insulating layer; 25. a heat-resistant layer of the combustion furnace; 26. a rust-proof layer of the combustion furnace; 27. a combustion furnace exhaust pipe; 28. a combustion furnace anti-skid pad.
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.
Referring to fig. 1-4, an embodiment of the present invention is provided: the low-nitrogen vertical pulverized coal burner comprises a burner housing 1, wherein a top burner 2 is arranged above the burner housing 1, and the top burner 2 is the main combustion equipment of the pulverized coal boiler. The function of the device is to ensure that the fuel and the combustion air can be fully mixed when entering the hearth. The combustion furnace shell 1 and the top burner 2 are fixedly connected through the top burner fixing seat 6, a combustion furnace oil inlet pipe 4 and a coal furnace feed pipe 5 are arranged above the top burner 2, the combustion furnace oil inlet pipe 4 is used for guiding the entering of oil, the coal furnace feed pipe 5 is used for guiding the entering of coal dust, two coal furnace feed pipes 5 are arranged, the combustion furnace oil inlet pipe 4 is positioned between the coal furnace feed pipes 5, primary air inlet pipes 3 are respectively arranged at two sides of the top burner 2, the primary air inlet pipes 3 are in welded connection with the top burner 2, the welding is the most stable one in the connection mode, the rigidity of the structure between the primary air inlet pipes 3 and the top burner 2 is larger, the integrity of the structure is good, an exhaust explosion-proof chimney 7 is arranged at one side above the combustion furnace shell 1, the exhaust explosion-proof chimney 7 is used for discharging the burnt waste gas, the other side above the combustion furnace shell 1 is provided with a secondary air inlet pipe 8, both sides of the combustion furnace shell 1 are respectively provided with a tertiary air inlet pipe 9, the tertiary air inlet pipes 9 are symmetrical relative to the vertical center line of the combustion furnace shell 1, a circulating air inlet pipe 10 is arranged below the tertiary air inlet pipes 9, the pulverized coal is fully combusted through the arrangement of the primary air inlet pipe 3, the secondary air inlet pipe 8, the tertiary air inlet pipe 9 and the circulating air inlet pipe 10, thereby reducing the pulverized coal consumption by about ten percent to twenty percent, saving the pulverized coal consumption cost during production, a combustion furnace supporting seat 12 is arranged below the combustion furnace shell 1, the combustion furnace supporting seat 12 provides support for the combustion furnace shell 1, the inner wall of the combustion furnace shell 1 is provided with a combustion furnace porous inner cylinder supporting lug 13, the porous inner barrel supporting lug 13 of the combustion furnace is used for limiting the porous inner barrel 14 of the combustion furnace, the porous inner barrel supporting lug 13 of the combustion furnace and the combustion furnace shell 1 are of an integrated structure, the porous inner barrel 14 of the combustion furnace is arranged in the combustion furnace shell 1, and the porous inner barrel 14 of the combustion furnace provides space for combustion of pulverized coal.
Further, the tertiary air inlet pipe 9 is welded with the combustion furnace shell 1, and the welding is the most stable one in the connection mode, so that the rigidity of the structure between the tertiary air inlet pipe 9 and the combustion furnace shell 1 is high, and the structural integrity is good.
Further, the lower end of the combustion furnace shell 1 is provided with a combustion furnace exhaust pipe 27, and the lower end of the combustion furnace exhaust pipe 27 penetrates through and extends to the outside of the combustion furnace supporting seat 12, and the connection between the combustion furnace shell 1 and the hot air exhaust elbow 11 is realized through the arrangement of the combustion furnace exhaust pipe 27.
Further, the combustion furnace anti-skid pad 28 is arranged below the outer wall of the combustion furnace shell 1, the lower end face of the combustion furnace anti-skid pad 28 is attached to the upper end face of the combustion furnace supporting seat 12, and the combustion furnace anti-skid pad 28 can enable the placement of the combustion furnace shell 1 to be more stable.
Further, the hot air exhaust elbow pipe 11 is arranged below the combustion fire exhaust pipe 27, the hot air exhaust elbow pipe 11 is in threaded sealing connection with the combustion fire exhaust pipe 27, and the sealing connection effectively prevents air from leaking from a gap when hot air is transmitted between the hot air exhaust elbow pipe 11 and the combustion fire exhaust pipe 27.
Further, the porous inner barrel 14 of the combustion furnace comprises a sealed barrel shell 15, a ventilation barrel shell 16, a circulating ventilation hole 17, a hanging ring 18 of the porous inner barrel of the combustion furnace, a coal trough 19 and a supporting convex block trough 20, one end of the supporting convex block 13 of the porous inner barrel of the combustion furnace extends to the inside of the supporting convex block trough 20, and the heat exchange between the pulverized coal and the air in the porous inner barrel 14 of the combustion furnace is effectively realized through the arrangement of each structure, so that the utilization rate of the pulverized coal is improved.
Further, sealed shell 15 is located the top of ventilation shell 16, and ventilation shell 16 and sealed shell 15 structure as an organic whole, the connection between integrated structure messenger ventilation shell 16 and the sealed shell 15 is more firm, the porous inner tube link 18 of burning furnace is located the top of sealed shell 15, and sealed shell 15 and the porous inner tube link 18 welded connection of burning furnace, the inside of sealed shell 15, ventilation shell 16 and the porous inner tube link 18 of burning furnace is provided with coal silo 19, support lug groove 20 is located the both sides of the porous inner tube link 18 lower extreme of burning furnace, and support lug groove 20 is symmetrical with the vertical central line of the porous inner tube link 18 of burning furnace about, the setting in support lug groove 20 is used for providing spacingly with the prevention of the porous inner tube link 18 of burning furnace.
Further, the combustion furnace shell 1 comprises a combustion furnace self-cleaning layer 21, a combustion furnace anticorrosive layer 22, a combustion furnace fixing layer 23, a combustion furnace heat insulation layer 24, a combustion furnace heat-resistant layer 25 and a combustion furnace antirust layer 26, wherein the combustion furnace self-cleaning layer 21 is positioned on the outer surface of the combustion furnace shell 1, the combustion furnace antirust layer 26 is positioned on the inner surface of the combustion furnace shell 1, heat preservation and heat insulation of the combustion furnace shell 1 are realized through the arrangement of various structures, and the outer wall temperature is prevented from being too high, and workers are scalded.
Further, the combustion furnace anticorrosive coating 22 is located the inside of the combustion furnace self-cleaning layer 21, the surface of the combustion furnace shell 1 is effectively kept clean by the arrangement of the combustion furnace self-cleaning layer 21, the surface of the combustion furnace shell 1 is effectively prevented from being corroded by rainwater and oxidized by the arrangement of the combustion furnace anticorrosive coating 22, the combustion furnace fixing layer 23 is located the inside of the combustion furnace anticorrosive coating 22, the combustion furnace heat-resistant layer 25 is located the inside of the combustion furnace fixing layer 23, the combustion furnace heat-resistant layer 25 can effectively block heat, the combustion furnace heat-insulating layer 24 is located between the combustion furnace fixing layer 23 and the combustion furnace heat-resistant layer 25, the combustion furnace heat-insulating layer 24 can effectively isolate heat conduction, and the combustion furnace rust-preventing layer 26 is located the inside of the combustion furnace heat-resistant layer 25.
Further, the circulating air inlet pipe 10 is in welded connection with the combustion furnace shell 1, the top burner 2 is in welded connection with the primary air inlet pipe 3, welding is the most stable one of the connection modes, the rigidity of the structure between the circulating air inlet pipe 10 and the combustion furnace shell 1 and between the top burner 2 and the primary air inlet pipe 3 is high, the structural integrity is good, the combustion furnace oil inlet pipe 4 and the coal furnace inlet pipe 5 are in threaded sealing connection with the top burner 2, and leakage during coal powder inlet of the combustion furnace oil inlet pipe 4 and the coal furnace inlet pipe 5 is effectively prevented through the sealing connection.
Working principle: during production, oil enters the top burner 2 through the oil inlet pipe 4 of the combustion furnace, air enters the top burner 2 through the primary air inlet pipe 3, oil and air are converged in the top burner 2, the top burner 2 is ignited, after ignition is successful, coal dust enters a combustion area of the top burner 2 through the coal furnace inlet pipe 5, the coal dust is combusted in the top burner 2, and the flame shape of the top burner 2 is adjusted by adjusting the air inlet amounts of the primary air inlet pipe 3 and the secondary air inlet pipe 8, so that stable combustion of the coal dust in the top burner 2 under different working conditions can be realized. The inlet positions of the secondary air inlet pipe 8 and the tertiary air inlet pipe 9 are in an up-down hierarchical structure, so that combustion air can enter the combustion furnace in a layered manner, the pulverized coal combustion efficiency is improved, the generation of nitrogen oxides at high temperature is reduced, and the problem of coking in a hearth of the combustion furnace is avoided. The circulating air is introduced into the hearth of the combustion furnace shell 1 through a circulating air inlet pipe 10 reserved on the combustion furnace shell 1, so that the circulating air contacts with air heated by pulverized coal combustion in the hearth and exchanges heat. The high-temperature hot air generated in the combustion furnace shell 1 enters the hot air discharge elbow pipe 11 through the combustion furnace exhaust pipe 27 below the combustion furnace shell 1 to be led to a workshop requiring a hot air source for next production.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides a low nitrogen vertical pulverized coal burner, includes burning furnace casing (1), its characterized in that: the utility model discloses a combustion furnace, which is characterized in that a top burner (2) is arranged above a combustion furnace shell (1), the combustion furnace shell (1) is fixedly connected with the top burner (2) through a top burner fixing seat (6), a combustion furnace oil inlet pipe (4) and a coal furnace inlet pipe (5) are arranged above the top burner (2), two coal furnace inlet pipes (5) are arranged, the combustion furnace oil inlet pipe (4) is positioned between the coal furnace inlet pipes (5), primary air inlet pipes (3) are respectively arranged on two sides of the top burner (2), the primary air inlet pipes (3) are connected with the top burner (2) in a welding way, an exhaust anti-explosion chimney (7) is arranged on one side above the combustion furnace shell (1), a secondary air inlet pipe (8) is arranged on the other side above the combustion furnace shell (1), tertiary air inlet pipes (9) are respectively arranged on two sides of the combustion furnace shell (1), are symmetrical relative to the vertical center line of the combustion furnace shell (1), a circulating air inlet pipe (10) is arranged below the tertiary air inlet pipes (9), a circulating air inlet pipe (10) is arranged on the combustion furnace shell (1), a supporting inner wall (13) of the combustion furnace shell is provided with a porous furnace inner wall (13), and be integrated into one piece structure between porous inner tube supporting lug (13) of burning furnace and the burning furnace casing (1), the inside of burning furnace casing (1) is provided with the porous inner tube of burning furnace (14), the porous inner tube of burning furnace (14) are including sealed shell (15), ventilation shell (16), circulation ventilation hole (17), porous inner tube link (18) of burning furnace, coal silo (19) and supporting lug groove (20), the inside that one end of porous inner tube supporting lug (13) of burning furnace extends to supporting lug groove (20), sealed shell (15) are located the top of ventilation shell (16), and the inside of ventilation shell (16) and sealed shell (15) are integrated into one piece structure, porous inner tube link (18) of burning furnace are located the top of sealed shell (15), and sealed shell (15) and porous inner tube link (18) welded connection of burning furnace, the inside of sealed shell (15), ventilation shell (16) and porous inner tube link (18) are provided with trough (19), supporting lug (20) are located the inside of the porous inner tube of burning furnace (18), the porous inner tube link (21) of burning furnace (20) are located the combustion layer (21) and are located the combustion layer (1), and the combustion layer (22) is located between the vertical combustion layer (1) and the combustion layer (20) is including the combustion layer, the combustion layer (21) is perpendicular to the inner tube of the porous inner tube link (18) is located The self-cleaning combustion furnace comprises a combustion furnace fixing layer (23), a combustion furnace heat insulation layer (24), a combustion furnace heat-resistant layer (25) and a combustion furnace antirust layer (26), wherein the combustion furnace self-cleaning layer (21) is positioned on the outer surface of a combustion furnace shell (1), and the combustion furnace antirust layer (26) is positioned on the inner surface of the combustion furnace shell (1).
2. A low nitrogen vertical pulverized coal burner as claimed in claim 1, wherein: the tertiary air inlet pipe (9) is welded with the combustion furnace shell (1).
3. A low nitrogen vertical pulverized coal burner as claimed in claim 1, wherein: the lower end of the combustion furnace shell (1) is provided with a combustion furnace exhaust pipe (27), and the lower end of the combustion furnace exhaust pipe (27) penetrates through and extends to the outside of the combustion furnace supporting seat (12).
4. A low nitrogen vertical pulverized coal burner as claimed in claim 1, wherein: the anti-skid pad (28) of the combustion furnace is arranged below the outer wall of the combustion furnace shell (1), and the lower end surface of the anti-skid pad (28) of the combustion furnace is attached to the upper end surface of the support seat (12) of the combustion furnace.
5. A low nitrogen vertical pulverized coal burner as set forth in claim 3, wherein: a hot air discharge elbow pipe (11) is arranged below the combustion furnace exhaust pipe (27), and the hot air discharge elbow pipe (11) is in threaded sealing connection with the combustion furnace exhaust pipe (27).
6. A low nitrogen vertical pulverized coal burner as claimed in claim 1, wherein: the combustion furnace anticorrosive coating (22) is located inside the combustion furnace self-cleaning layer (21), the combustion furnace fixing layer (23) is located inside the combustion furnace anticorrosive coating (22), the combustion furnace heat-resistant layer (25) is located inside the combustion furnace fixing layer (23), the combustion furnace heat-insulating layer (24) is located between the combustion furnace fixing layer (23) and the combustion furnace heat-resistant layer (25), and the combustion furnace antirust layer (26) is located inside the combustion furnace heat-resistant layer (25).
7. A low nitrogen vertical pulverized coal burner as claimed in claim 1, wherein: the circulating air inlet pipe (10) is connected with the combustion furnace shell (1) in a welding way, the top burner (2) is connected with the primary air inlet pipe (3) in a welding way, and the combustion furnace oil inlet pipe (4) and the coal furnace feed pipe (5) are connected with the top burner (2) in a sealing way through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910044294.0A CN109578989B (en) | 2019-01-17 | 2019-01-17 | Low-nitrogen vertical pulverized coal combustion furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910044294.0A CN109578989B (en) | 2019-01-17 | 2019-01-17 | Low-nitrogen vertical pulverized coal combustion furnace |
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| Publication Number | Publication Date |
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| CN109578989A CN109578989A (en) | 2019-04-05 |
| CN109578989B true CN109578989B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910044294.0A Active CN109578989B (en) | 2019-01-17 | 2019-01-17 | Low-nitrogen vertical pulverized coal combustion furnace |
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| CN111442260B (en) * | 2020-03-24 | 2022-11-08 | 中国神华能源股份有限公司国华电力分公司 | Coal combustion system and method for industrial boiler |
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