CN109611844A - A kind of fractional combustion natural gas combustion nozzle and its application method - Google Patents
A kind of fractional combustion natural gas combustion nozzle and its application method Download PDFInfo
- Publication number
- CN109611844A CN109611844A CN201811546722.1A CN201811546722A CN109611844A CN 109611844 A CN109611844 A CN 109611844A CN 201811546722 A CN201811546722 A CN 201811546722A CN 109611844 A CN109611844 A CN 109611844A
- Authority
- CN
- China
- Prior art keywords
- combustion
- windband
- air
- burner
- blast pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
-
- 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
- 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
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- 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
- F23D14/62—Mixing devices; Mixing tubes
-
- 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
- F23L1/00—Passages or apertures for delivering primary air for combustion
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
A kind of fractional combustion natural gas combustion nozzle and its application method, including main blast pipe, secondary blast pipe and into fuel gas conduit, the main blast pipe outlet end is connected with burner shell input end, one of port of remaining two-port of burner shell is fixedly mounted by bolt and backboard, another port inner wall is provided with interior burner block, the secondary blast pipe outlet end is connected with central air hose, it is described to be connected into fuel gas conduit outlet end with exhaust gas nozzle input end, central air hose is located in exhaust gas nozzle and the two axis is overlapped, the exhaust gas nozzle runs through the through-hole of backboard, exhaust gas nozzle is provided with cyclone I close to spout end inner sidewall, the exhaust gas nozzle periphery is arranged with windband component, and windband component is fixedly mounted by bolt and burner shell.The present invention uses the air staged combustion technology of windband modular construction, facilitates the adjusting of first and second combustion air ratio；The present invention can effectively eliminate the local high temperature zone in flame, and nitrogen oxide emission can reduce 55% or so in combustion product.
Description
Technical field
The invention belongs to industrial furnace heat power engineering fields, while being related to gas classification burning and mass transfer, heat transfer applications technology
Field, and in particular to a kind of fractional combustion natural gas combustion nozzle and its application method.
Background technique
The domestic natural gas combustion nozzle for being used for industrial furnace at present, the general sleeve type structure using air package combustion gas, combustion
Gas is sprayed by the pipe at center, and combustion air is by the casing in periphery, under the turning effort of cyclone, with swirling eddy
Form sprays into burner hearth, and the two is burnt on burner hearth inner edge mixing side, forms cylindrical or tubaeform revolving body flame, belongs to typical case
Non- premixed combustion flame.Flame inside is the reducing atmosphere based on fuel, and outside is steamed with air, carbon dioxide, water
Oxidizing atmosphere based on the combustion products such as gas.On the one hand, blank is surrounded by the oxidizing atmosphere always during heating, is caused
Keep blank oxidization burning loss serious；On the other hand, degree of sprawling is shorter in the horizontal direction for this revolving body flame, causes high-temperature region collection
In in lesser region, the perpendicular projection area that is heated on blank is small, RADIATION ANGLE COEFFICIENT is lower, both affected blank plus
Thermal effect, also easily forms local high temperature zone, and the presence of local high temperature zone provides just to the generation of thermal NO
Sharp condition causes the amount of nitrogen oxides in combustion product higher, easily causes environmental pollution.
Summary of the invention
The object of the present invention is to provide one kind can effectively solve the heating of revolving body flame caused by conventional natural gas burner
Of poor quality, billet oxidization burning loss is serious, the technical problems such as pollutant loads height such as nitrogen oxides in combustion product, collects energy conservation and environmental protection
A kind of fractional combustion natural gas combustion nozzle and its application method being integrated.
A kind of fractional combustion natural gas combustion nozzle, including main blast pipe, secondary blast pipe and into fuel gas conduit, the main blast pipe goes out
Mouth end is connected with burner shell input end, and one of port of remaining two-port of burner shell is solid by bolt and backboard
Dingan County's dress, the secondary blast pipe outlet end is connected with central air hose, described into fuel gas conduit outlet end and exhaust gas nozzle input end phase
Even, central air hose is located in exhaust gas nozzle, and central air hose axis is overlapped with exhaust gas nozzle axis, and the exhaust gas nozzle is through back
The through-hole of plate extends to burner shell inner cavity, and exhaust gas nozzle is provided with cyclone I, the gas injection close to spout end inner sidewall
Pipe periphery is arranged with windband component, and windband component is fixedly mounted by Special-shaped flange and bolt and the burner shell other end,
Burner shell another port inner wall is provided with interior burner block, and interior combustion chamber and interior burning production are offered in the middle part of interior burner block
Object channel, and interior combustion chamber outlet end is connected with interior combustion product channels, the spout of the exhaust gas nozzle is intracavitary positioned at interior burning,
And close to the entrance of interior combustion chamber, the interior burner block edge is provided with two secondary air channels, Secondary Air by axisymmetrical
Channel entrance is connected to main blast pipe, and secondary air channel outlet is connected to burner hearth.
The windband component includes that fixed windband and activity windband, the fixed windband are sheathed on the outside of exhaust gas nozzle,
And First air channel is formed between exhaust gas nozzle outer wall and fixed windband inner wall, fixed windband inner wall is filled close to interior combustion chamber one end
Equipped with cyclone II, fixed windband is equipped with II one end of cyclone and is fixed by Special-shaped flange and bolt with the burner shell other end
Installation, fixed windband other end periphery are arranged with activity windband, and activity windband is opened with fixed windband in its lap respectively
Equipped with air port I and air port II, the size of opening is formed by rotary moveable windband regulating tuyere I and air port II, it is described primary
Wind one end of the channel is connected by the opening with main blast pipe, and the First air channel other end is connected to interior combustion chamber.
Activity windband one end is minor diameter pipe, and the other end is large diameter pipe, the activity windband minor diameter pipe outer circle
Surface cover is equipped with retainer plate and windband circle, and retainer plate and windband circle are respectively positioned on outside burner shell, and the retainer plate and backboard are solid
Dingan County's dress, retainer plate and activity windband minor diameter pipe are fixedly mounted by positioning screw, and the windband circle and activity windband are small straight
Diameter pipe is fixedly mounted, and the activity windband large diameter pipe inner wall sleeve is equipped with fixed windband.
The combustion air inlet of the secondary blast pipe accounts for the 10-20% of whole combustion air inlets.
The air port I and air port II are rectangle, circle, ellipse or triangle, the coincidence between air port I and air port II
When area reaches maximum value, ratio shared by primary air reaches 40%.
A kind of application method of fractional combustion natural gas combustion nozzle, using a kind of fractional combustion natural gas combustion nozzle, including it is following
Step:
Step 1, processing prepares the building block of fractional combustion natural gas combustion nozzle, according to the size of thermic load, production it is main into
Air hose, secondary blast pipe, into fuel gas conduit, burner shell, backboard, central air hose, exhaust gas nozzle, cyclone I, interior burner block, fixation
Windband, activity windband, retainer plate, windband circle, air port I, air port II, cyclone II and Special-shaped flange, by building block successively group
It is attached to together, prepares fractional combustion natural gas combustion nozzle；
Step 2, the main blast pipe of burner and time blast pipe are passed through flange respectively and are connected with stokehold air supply line first,
It is secondary to be connected into fuel gas conduit by flange with stokehold steam line, finally burner is mounted on the furnace body of flame furnace；
Step 3, after burner is installed on furnace body, the flow of required natural gas and combustion air is calculated by by burning,
And the stubborn positioning screw of pine, rotary wind lasso rotation activity windband regulating tuyere I and air port II are passed through according to actual combustion case
Between overlapping area adjust the size of opening, and then adjust the ratio of primary air and secondary combustion-supporting air；Naturally
Gas is by entering burner into fuel gas conduit, after the turning effort by cyclone I, sprays into interior combustion chamber；Combustion air passes through main air inlet
Pipe and time blast pipe enter burner；Combustion air a part into main blast pipe passes through on fixed windband and activity windband tube wall
Air port I and air port II between intersection opening, into the inner cavity of fixed windband and activity windband, the combustion-supporting sky in this part
The primary air of gas and the combustion air composition burner from central air hose, this part combustion air pass through cyclone II
After turning effort, in the form of rotating flow and the natural gas of the spout of exhaust gas nozzle ejection sprays into interior combustion chamber together；Natural gas
Imperfect combustion occurs in interior combustion chamber with primary air, then sprays into burner hearth by interior combustion product channels；Into
Another part of the combustion air of main blast pipe is secondary combustion-supporting air, is injected directly into burner hearth by secondary air channel, this part
Combustion air mixes again with the imperfect combustion product of the intracavitary generation of interior burning sprayed by interior combustion product channels, and
Entire combustion process is completed in burner hearth.
The invention has the benefit that
1) burner of the present invention makes first and second to help using the air staged combustion technology of fixed windband and activity windband structure
It is easy to adjust simple to fire AIR Proportional.
2) burner of the present invention can effectively eliminate the local high temperature zone in flame, and nitrogen oxide emission can subtract in combustion product
Few 55% or so.
3) burner flame stream of the present invention is flat, is covered on blank surface, RADIATION ANGLE COEFFICIENT is big, and the thermal efficiency can be improved
12% or so.
4) flame front of nearly blank is weak reducing atmosphere, can effectively reduce the oxidization burning loss 25% or so of steel billet, base
Material heating quality is greatly improved.
Detailed description of the invention
Fig. 1 is burner overall structure diagram of the present invention；
The main blast pipe of 1-, 2- blast pipe, 3- is into fuel gas conduit, 4- burner shell, 5- backboard, 6- central air hose, 7- combustion gas
Jet pipe, 8- cyclone I, 9- windband component, burner block in 10-, combustion chamber in 11-, combustion product channels in 12-, 13- Secondary Air
Channel, the fixed windband of 14-, 15- activity windband, 16- retainer plate, 17- windband circle, the air port 18- I, the air port 19- II, 20- cyclone
II, 21- Special-shaped flange.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figure 1, a kind of fractional combustion natural gas combustion nozzle, including main blast pipe 1, secondary blast pipe 2 and into fuel gas conduit 3,
1 outlet end of main blast pipe is connected with 4 input end of burner shell, one of end of 4 remaining two-port of burner shell
Mouth is fixedly mounted by bolt and backboard 5, and secondary 2 outlet end of blast pipe is connected with central air hose 6, described to go out into fuel gas conduit 3
Mouth end is connected with 7 input end of exhaust gas nozzle, and central air hose 6 is located in exhaust gas nozzle 7, and 6 axis of central air hose and exhaust gas nozzle 7
Axis is overlapped, and the exhaust gas nozzle 7 extends to 4 inner cavity of burner shell through the through-hole of backboard 5, and exhaust gas nozzle 7 is close to spout
End inner sidewall is provided with cyclone I 8, and 7 periphery of exhaust gas nozzle is arranged with windband component 9, and windband component 9 passes through bolt
It is fixedly mounted with 4 other end of burner shell, the 4 another port inner wall of burner shell is provided with interior burner block 10, and interior burner
Interior combustion chamber 11 and interior combustion product channels 12, and 11 outlet end of interior combustion chamber and interior combustion product channels are offered in the middle part of brick 10
12 are connected, and the spout of the exhaust gas nozzle 7 is located in interior combustion chamber 11, and close to the entrance of interior combustion chamber 11, the interior burner
10 edge of brick is provided with two secondary air channels 13 by axisymmetrical, and 13 import of secondary air channel is connected to main blast pipe 1, and two
The secondary outlet of wind channel 13 is connected to burner hearth.
The windband component 9 includes that fixed windband 14 and activity windband 15, the fixed windband 14 are sheathed on exhaust gas nozzle 7
Outside, and First air channel is formed between 7 outer wall of exhaust gas nozzle and fixed 14 inner wall of windband, fixed 14 inner wall of windband is close to interior
11 one end of combustion chamber is equipped with cyclone II 20, and fixed windband 14 is equipped with II 20 one end of cyclone and passes through Special-shaped flange 21 and spiral shell
Bolt and 4 other end of burner shell are fixedly mounted, and fixed 14 other end periphery of windband is arranged with activity windband 15, activity windband 15
Air port I 18 and air port II 19 are offered respectively in its lap with fixed windband 14, and wind is adjusted by rotary moveable windband 15
Mouth I 18 and air port II 19 form the size of opening, and the First air one end of the channel passes through the opening and main 1 phase of blast pipe
Even, the First air channel other end is connected to interior combustion chamber 11.
Described 15 one end of activity windband is minor diameter pipe, and the other end is large diameter pipe, the 15 minor diameter pipe of activity windband
Periphery is arranged with retainer plate 16 and windband circle 17, and retainer plate 16 and windband circle 17 are respectively positioned on outside burner shell 4, described solid
Surely circle 16 is fixedly mounted with backboard 5, and retainer plate 16 and 15 minor diameter pipe of activity windband are fixedly mounted by positioning screw, the wind
Lasso 17 and 15 minor diameter pipe of activity windband are fixedly mounted, and the 15 large diameter pipe inner wall sleeve of activity windband is equipped with fixed windband
14。
The combustion air inlet of the secondary blast pipe 2 accounts for the 10-20% of whole combustion air inlets.
The air port I 18 and air port II 19 are rectangle, circle, ellipse or triangle, when air port I 18 and air port II 19 it
Between overlapping area when reaching maximum value, ratio shared by primary air reaches 40%.
It with lower calorific value is 34621kJ/m in the present embodiment3Natural gas be fuel, the percentage of ingredient is CH4
92.1%, C2H63%, C3H81.5%, C4H100.1%, CO22.0%, N21.0%, O20.3%, the specified heat of burner is negative
Lotus is 215kW；Taking Air compress pump is 1.02.
A kind of application method of fractional combustion natural gas combustion nozzle, using a kind of fractional combustion natural gas combustion nozzle, including it is following
Step:
Step 1, processing prepares the building block of fractional combustion natural gas combustion nozzle, is 215kW according to burner rated heat input, rated heat load,
Make main blast pipe 1, secondary blast pipe 2, into fuel gas conduit 3, burner shell 4, backboard 5, central air hose 6, exhaust gas nozzle 7, cyclone I
8, interior burner block 10, fixed windband 14, activity windband 15, retainer plate 16, windband circle 17, air port I 18, air port II 19, cyclone
II 20 and Special-shaped flange 21, building block is successively assemblied together, fractional combustion natural gas combustion nozzle is prepared；
Step 2, the main blast pipe 1 of burner and time blast pipe 2 are connected by flange with stokehold air supply line respectively first,
Secondly it is connected into fuel gas conduit 3 by flange with stokehold steam line, finally burner is mounted on the furnace body of flame furnace；
Step 3, after burner is installed on furnace body, the flow of required natural gas and combustion air is calculated by by burning,
And according to actual combustion case by the stubborn positioning screw of pine, between 17 regulating tuyere I 18 of rotary wind lasso and air port II 19
Overlapping area adjusts the size of opening, and then adjusts the ratio of primary air and secondary combustion-supporting air；Natural gas by into
Fuel gas conduit 3 enters burner, after the turning effort by cyclone I 8, spray into combustion chamber 11, natural gas is into before fuel gas conduit 3
Pressure is 3500Pa, and combustion air enters burner by main blast pipe 1 and time blast pipe 2, and combustion air is into main 1 He of blast pipe
Pressure is 4500Pa before secondary blast pipe 2；Combustion air a part into main blast pipe 1 passes through fixed windband 14 and activity windband
The opening of intersection between air port I 18 on 15 tube walls and air port II 19, into fixed windband 14 and activity windband 15
Inner cavity, this part combustion air and the combustion air from central air hose 6 constitute the primary air of burner, this part is combustion-supporting
Air is by after the turning effort of cyclone II 20, in the form of rotating flow and natural gas one that the spout of exhaust gas nozzle 7 sprays
Combustion chamber 11 in spraying into is acted, in interior combustion chamber 11 imperfect combustion occurs for natural gas and primary air, then by interior
Combustion product channels 12 spray into burner hearth；Another part into the combustion air of main blast pipe 1 is secondary combustion-supporting air, passes through two
Secondary wind channel 13 is injected directly into burner hearth, this part combustion air with by interior combustion product channels 12 penetrating interior combustion chamber 11 in
The imperfect combustion product of generation mixes again, and entire combustion process is completed in burner hearth, in the combustion process of natural gas
The size for constantly changing opening by 17 rotary moveable windband 15 of rotation windband circle, realizes natural gas fractional combustion；It leans on and combustion gas
The coaxial central air hose 6 of jet pipe 7 adjusts the rigidity of flame, controls the shape of flame, while increasing primary air and day
The disturbance of right gas, promotes the mixing of the two.
When the combustion air inlet of time blast pipe 2 accounts for the 15% of whole combustion-supporting air quantities in the present embodiment, I 18 He of air port
Overlapping area between air port II 19 reaches the 90% of maximum value, when ratio shared by primary air is up to 30%, it can be achieved that
The fractional combustion of natural gas effectively eliminates the local high temperature zone in flame, and nitrogen oxide emission can be reduced in combustion product
45%, flame flow be it is flat, the thermal efficiency can be improved 12%, close to blank flame front be weak reducing atmosphere, can reduce
The oxidization burning loss 31% of steel billet.
Embodiment 2
As shown in Figure 1, a kind of fractional combustion natural gas combustion nozzle, including main blast pipe 1, secondary blast pipe 2 and into fuel gas conduit 3,
1 outlet end of main blast pipe is connected with 4 input end of burner shell, one of end of 4 remaining two-port of burner shell
Mouth is fixedly mounted by bolt and backboard 5, and secondary 2 outlet end of blast pipe is connected with central air hose 6, described to go out into fuel gas conduit 3
Mouth end is connected with 7 input end of exhaust gas nozzle, and central air hose 6 is located in exhaust gas nozzle 7, and 6 axis of central air hose and exhaust gas nozzle 7
Axis is overlapped, and the exhaust gas nozzle 7 extends to 4 inner cavity of burner shell through the through-hole of backboard 5, and exhaust gas nozzle 7 is close to spout
End inner sidewall is provided with cyclone I 8, and 7 periphery of exhaust gas nozzle is arranged with windband component 9, and windband component 9 passes through bolt
It is fixedly mounted with 4 other end of burner shell, the 4 another port inner wall of burner shell is provided with interior burner block 10, and interior burner
Interior combustion chamber 11 and interior combustion product channels 12, and 11 outlet end of interior combustion chamber and interior combustion product channels are offered in the middle part of brick 10
12 are connected, and the spout of the exhaust gas nozzle 7 is located in interior combustion chamber 11, and close to the entrance of interior combustion chamber 11, the interior burner
10 edge of brick is provided with two secondary air channels 13 by axisymmetrical, and 13 import of secondary air channel is connected to main blast pipe 1, and two
The secondary outlet of wind channel 13 is connected to burner hearth.
The windband component 9 includes that fixed windband 14 and activity windband 15, the fixed windband 14 are sheathed on exhaust gas nozzle 7
Outside, and First air channel is formed between 7 outer wall of exhaust gas nozzle and fixed 14 inner wall of windband, fixed 14 inner wall of windband is close to interior
11 one end of combustion chamber is equipped with cyclone II 20, and fixed windband 14 is equipped with II 20 one end of cyclone and passes through Special-shaped flange 21 and spiral shell
Bolt and 4 other end of burner shell are fixedly mounted, and fixed 14 other end periphery of windband is arranged with activity windband 15, activity windband 15
Air port I 18 and air port II 19 are offered respectively in its lap with fixed windband 14, and wind is adjusted by rotary moveable windband 15
Mouth I 18 and air port II 19 form the size of opening, and the First air one end of the channel passes through the opening and main 1 phase of blast pipe
Even, the First air channel other end is connected to interior combustion chamber 11.
Described 15 one end of activity windband is minor diameter pipe, and the other end is large diameter pipe, the 15 minor diameter pipe of activity windband
Periphery is arranged with retainer plate 16 and windband circle 17, and retainer plate 16 and windband circle 17 are respectively positioned on outside burner shell 4, described solid
Surely circle 16 is fixedly mounted with backboard 5, and retainer plate 16 and 15 minor diameter pipe of activity windband are fixedly mounted by positioning screw, the wind
Lasso 17 and 15 minor diameter pipe of activity windband are fixedly mounted, and the 15 large diameter pipe inner wall sleeve of activity windband is equipped with fixed windband
14。
The combustion air inlet of the secondary blast pipe 2 accounts for the 10-20% of whole combustion air inlets.
The air port I 18 and air port II 19 are rectangle, circle, ellipse or triangle, when air port I 18 and air port II 19 it
Between overlapping area when reaching maximum value, ratio shared by primary air reaches 40%.
It with lower calorific value is 34529kJ/m in the present embodiment3Natural gas be fuel, the percentage of ingredient is CH4
93.1%, C2H61.5%, C3H80.5%, C4H100.05%, CO22.5%, N21.5%, O20.85%, burner is specified
Thermic load is 300kW；Taking Air compress pump is 1.03.
A kind of application method of fractional combustion natural gas combustion nozzle, using a kind of fractional combustion natural gas combustion nozzle, including it is following
Step:
Step 1, processing prepares the building block of fractional combustion natural gas combustion nozzle, is 215kW according to burner rated heat input, rated heat load,
Make main blast pipe 1, secondary blast pipe 2, into fuel gas conduit 3, burner shell 4, backboard 5, central air hose 6, exhaust gas nozzle 7, cyclone I
8, interior burner block 10, fixed windband 14, activity windband 15, retainer plate 16, windband circle 17, air port I 18, air port II 19, cyclone
II 20 and Special-shaped flange 21, building block is successively assemblied together, fractional combustion natural gas combustion nozzle is prepared；
Step 2, the main blast pipe 1 of burner and time blast pipe 2 are connected by flange with stokehold air supply line respectively first,
Secondly it is connected into fuel gas conduit 3 by flange with stokehold steam line, finally burner is mounted on the furnace body of flame furnace；
Step 3, after burner is installed on furnace body, the flow of required natural gas and combustion air is calculated by by burning,
And according to actual combustion case by the stubborn positioning screw of pine, between 17 regulating tuyere I 18 of rotary wind lasso and air port II 19
Overlapping area adjusts the size of opening, and then adjusts the ratio of primary air and secondary combustion-supporting air；Natural gas by into
Fuel gas conduit 3 enters burner, after the turning effort by cyclone I 8, spray into combustion chamber 11, natural gas is into before fuel gas conduit 3
Pressure is 2500Pa, and combustion air enters burner by main blast pipe 1 and time blast pipe 2, and combustion air is into main 1 He of blast pipe
Pressure is 3500Pa before secondary blast pipe 2；Combustion air a part into main blast pipe 1 passes through fixed windband 14 and activity windband
The opening of intersection between air port I 18 on 15 tube walls and air port II 19, into fixed windband 14 and activity windband 15
Inner cavity, this part combustion air and the combustion air from central air hose 6 constitute the primary air of burner, this part is combustion-supporting
Air is by after the turning effort of cyclone II 20, in the form of rotating flow and natural gas one that the spout of exhaust gas nozzle 7 sprays
Combustion chamber 11 in spraying into is acted, imperfect combustion occurs in interior combustion chamber 11, then sprays into furnace by interior combustion product channels 12
Thorax；Another part into the combustion air of main blast pipe 1 is secondary combustion-supporting air, is injected directly into furnace by secondary air channel 13
The imperfect combustion product generated in thorax, this part combustion air and the interior combustion chamber 11 sprayed by interior combustion product channels 12
It mixes again, and completes entire combustion process in burner hearth, rotated in the combustion process of natural gas by rotation windband circle 17
Activity windband 15 constantly changes the size of opening, realizes natural gas fractional combustion；By the central air hose 6 coaxial with exhaust gas nozzle 7
Both it adjusts the rigidity of flame, control the shape of flame, while increasing the disturbance of primary air and natural gas, promote
Mixing.
When the combustion air inlet of time blast pipe 2 accounts for the 18% of whole combustion-supporting air quantities in the present embodiment, I 18 He of air port
Overlapping area between air port II 19 reaches the 95% of maximum value, when ratio shared by primary air is up to 37%, it can be achieved that
The fractional combustion of natural gas effectively eliminates the local high temperature zone in flame, and nitrogen oxide emission can be reduced in combustion product
51%, flame flow be it is flat, the thermal efficiency can be improved 15%, close to blank flame front be weak reducing atmosphere, can reduce
The oxidization burning loss 29% of steel billet.
Claims (6)
1. a kind of fractional combustion natural gas combustion nozzle, which is characterized in that described including main blast pipe, secondary blast pipe and into fuel gas conduit
Main blast pipe outlet end is connected with burner shell input end, and one of port of remaining two-port of burner shell passes through spiral shell
Bolt and backboard are fixedly mounted, and the secondary blast pipe outlet end is connected with central air hose, described into fuel gas conduit outlet end and gas injection
Pipe input end is connected, and central air hose is located in exhaust gas nozzle, and central air hose axis is overlapped with exhaust gas nozzle axis, the combustion gas
Jet pipe extends to burner shell inner cavity through the through-hole of backboard, and exhaust gas nozzle is provided with cyclone I close to spout end inner sidewall,
The exhaust gas nozzle periphery is arranged with windband component, and windband component passes through Special-shaped flange and bolt and the burner shell other end
It is fixedly mounted, burner shell another port inner wall is provided with interior burner block, and offers interior combustion chamber in the middle part of interior burner block
With interior combustion product channels, and interior combustion chamber outlet end is connected with interior combustion product channels, and the spout of the exhaust gas nozzle is located at
Interior burning is intracavitary, and close to the entrance of interior combustion chamber, the interior burner block edge is provided with two Secondary Airs by axisymmetrical
Channel, secondary air channel import are connected to main blast pipe, and secondary air channel outlet is connected to burner hearth.
2. a kind of fractional combustion natural gas combustion nozzle according to claim 1, it is characterised in that: the windband component includes solid
Determine windband and activity windband, the fixed windband is sheathed on the outside of exhaust gas nozzle, and in exhaust gas nozzle outer wall and fixed windband
First air channel is formed between wall, fixed windband inner wall is equipped with cyclone II, fixed windband assembly close to interior combustion chamber one end
There is II one end of cyclone to be fixedly mounted by Special-shaped flange and bolt and the burner shell other end, fixed windband other end periphery
It is arranged with activity windband, activity windband offers air port I and air port II in its lap with fixed windband respectively, passes through rotation
Activity windband regulating tuyere I and air port II form the size of opening, and the First air one end of the channel passes through the opening and master
Blast pipe is connected, and the First air channel other end is connected to interior combustion chamber.
3. a kind of fractional combustion natural gas combustion nozzle according to claim 2, it is characterised in that: activity windband one end is
Minor diameter pipe, the other end are large diameter pipe, and the activity windband minor diameter pipe periphery is arranged with retainer plate and windband circle, and solid
Fixed circle is respectively positioned on outside burner shell with windband circle, and the retainer plate and backboard are fixedly mounted, and retainer plate and activity windband are small straight
Diameter pipe is fixedly mounted by positioning screw, and the windband circle and activity windband minor diameter pipe are fixedly mounted, and the activity windband is big
Diameter tube inner wall sleeve is equipped with fixed windband.
4. a kind of fractional combustion natural gas combustion nozzle according to claim 1, it is characterised in that: the secondary blast pipe it is combustion-supporting
Air inlet accounts for the 10-20% of whole combustion air inlets.
5. a kind of fractional combustion natural gas combustion nozzle according to claim 2, it is characterised in that: the air port I and air port II
It is primary combustion-supporting when the overlapping area between air port I and air port II reaches maximum value for rectangle, circle, ellipse or triangle
Ratio shared by air reaches 40%.
6. a kind of application method of fractional combustion natural gas combustion nozzle, using a kind of fractional combustion natural gas described in claim 1
Burner, which comprises the following steps:
Step 1, processing prepares the building block of fractional combustion natural gas combustion nozzle, according to the size of thermic load, makes main blast pipe,
Secondary blast pipe, into fuel gas conduit, burner shell, backboard, central air hose, exhaust gas nozzle, cyclone I, interior burner block, fixed windband,
Activity windband, retainer plate, windband circle, air port I, air port II, cyclone II and Special-shaped flange, are successively assembled into one for building block
It rises, prepares fractional combustion natural gas combustion nozzle；
Step 2, the main blast pipe of burner and time blast pipe are passed through flange respectively first to be connected with stokehold air supply line, next into
Fuel gas conduit is connected by flange with stokehold steam line, and finally burner is mounted on the furnace body of flame furnace；
Step 3, after burner is installed on furnace body, the flow of required natural gas and combustion air, and root are calculated by by burning
According to actual combustion case by the stubborn positioning screw of pine, the overlapping area between rotary wind lasso regulating tuyere I and air port II comes
The size of opening is adjusted, and then adjusts the ratio of primary air and secondary combustion-supporting air；Natural gas into fuel gas conduit by entering
Burner after the turning effort by cyclone I, sprays into interior combustion chamber；Combustion air is entered by main blast pipe and time blast pipe
Burner；Combustion air a part into main blast pipe passes through air port I and air port II on fixed windband and activity windband tube wall
Between the opening of intersection this part combustion air and come from centre wind into the inner cavity of fixed windband and activity windband
The combustion air of pipe constitutes the primary air of burner, after the turning effort that this part combustion air passes through cyclone II, with
The natural gas that the form of rotating flow and the spout of exhaust gas nozzle spray sprays into interior combustion chamber, natural gas and primary air together
Imperfect combustion occurs in interior combustion chamber, then sprays into burner hearth by interior combustion product channels；Into the combustion-supporting of main blast pipe
Another part of air be secondary combustion-supporting air, burner hearth is injected directly by secondary air channel, this part combustion air with pass through
The imperfect combustion product for the intracavitary generation of interior burning that interior combustion product channels spray into mixes again, and completes entirely in burner hearth
Combustion process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811546722.1A CN109611844A (en) | 2018-12-18 | 2018-12-18 | A kind of fractional combustion natural gas combustion nozzle and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811546722.1A CN109611844A (en) | 2018-12-18 | 2018-12-18 | A kind of fractional combustion natural gas combustion nozzle and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109611844A true CN109611844A (en) | 2019-04-12 |
Family
ID=66009515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811546722.1A Pending CN109611844A (en) | 2018-12-18 | 2018-12-18 | A kind of fractional combustion natural gas combustion nozzle and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109611844A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260321A (en) * | 2019-06-30 | 2019-09-20 | 华中科技大学 | It is a kind of to realize ultralow NOxThe rotary flameless burner of discharge |
| CN111059530A (en) * | 2019-11-27 | 2020-04-24 | 广东工业大学 | Roller kiln energy-saving combustion device based on spiral-flow type secondary mixing and control method thereof |
| CN111536515A (en) * | 2020-05-13 | 2020-08-14 | 济南威光节能科技有限公司 | Four-stage air supply gas low-nitrogen burner |
| CN112406037A (en) * | 2020-10-30 | 2021-02-26 | 李应根 | Multi-stage flow adjusting mechanism of multi-cavity injection mold |
| CN115325536A (en) * | 2022-08-17 | 2022-11-11 | 东北大学 | Low NOx discharges nozzle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0780636A2 (en) * | 1995-12-18 | 1997-06-25 | Carrier Corporation | Sound inhibitor baffles |
| CN202092129U (en) * | 2011-05-20 | 2011-12-28 | 中冶华天工程技术有限公司 | Gas burner |
| CN203628653U (en) * | 2013-07-24 | 2014-06-04 | 中冶华天工程技术有限公司 | Oxygen-enriched burner |
| CN104315541A (en) * | 2014-09-26 | 2015-01-28 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Duty-stage spray nozzle of combustion chamber and use method of spray nozzle |
-
2018
- 2018-12-18 CN CN201811546722.1A patent/CN109611844A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0780636A2 (en) * | 1995-12-18 | 1997-06-25 | Carrier Corporation | Sound inhibitor baffles |
| CN202092129U (en) * | 2011-05-20 | 2011-12-28 | 中冶华天工程技术有限公司 | Gas burner |
| CN203628653U (en) * | 2013-07-24 | 2014-06-04 | 中冶华天工程技术有限公司 | Oxygen-enriched burner |
| CN104315541A (en) * | 2014-09-26 | 2015-01-28 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Duty-stage spray nozzle of combustion chamber and use method of spray nozzle |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260321A (en) * | 2019-06-30 | 2019-09-20 | 华中科技大学 | It is a kind of to realize ultralow NOxThe rotary flameless burner of discharge |
| CN110260321B (en) * | 2019-06-30 | 2020-06-02 | 华中科技大学 | Realize ultralow NOxVented rotary flameless combustor |
| CN111059530A (en) * | 2019-11-27 | 2020-04-24 | 广东工业大学 | Roller kiln energy-saving combustion device based on spiral-flow type secondary mixing and control method thereof |
| CN111536515A (en) * | 2020-05-13 | 2020-08-14 | 济南威光节能科技有限公司 | Four-stage air supply gas low-nitrogen burner |
| CN112406037A (en) * | 2020-10-30 | 2021-02-26 | 李应根 | Multi-stage flow adjusting mechanism of multi-cavity injection mold |
| CN115325536A (en) * | 2022-08-17 | 2022-11-11 | 东北大学 | Low NOx discharges nozzle |
| CN115325536B (en) * | 2022-08-17 | 2024-06-11 | 东北大学 | Low NOx discharges nozzle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109611844A (en) | A kind of fractional combustion natural gas combustion nozzle and its application method | |
| CN202092129U (en) | Gas burner | |
| CN104235849B (en) | Staged oxygen-enriched flameless combustion gas burner and control method thereof | |
| CN202253650U (en) | Adjustable-temperature gas burner | |
| CN202660534U (en) | Low-NOX fluid slagging pulverized coal combusting device with tertiary swirl air | |
| CN106402861B (en) | The ultralow indole energy spiral combustion head of industrial combustion gas and burner | |
| CN104266190A (en) | Oxygen-enriched flameless gas burner and control method thereof | |
| CN103791494A (en) | Air-cooled pulverized coal low-nitrogen combustor and application method thereof | |
| CN1313765C (en) | Method for controlling burning state of coal powder boiler fire | |
| CN103398379A (en) | Oxygen-enriched burner | |
| CN105042585A (en) | Pulverized coal burner | |
| CN106224949A (en) | A kind of non-coaxial horizontal bias low NOx DC coal burner | |
| CN102235814B (en) | Direct-combustion hot blast heater | |
| CN203628653U (en) | Oxygen-enriched burner | |
| CN204042896U (en) | Reduce burner and the gas fired-boiler of discharged nitrous oxides | |
| CN106051759B (en) | Multi-stage separation central backflow formula axial rotational flow burner | |
| CN209926348U (en) | Low-nitrogen combustor system with flue gas double-path circulation and combustion area division | |
| CN205119046U (en) | Swirl pulverized coal burner | |
| CN109611843A (en) | A kind of adjustable biological fuel gas burner of the length of flame and its application method | |
| CN102252323A (en) | Self-preheating oxygen-enriched combustor for combustion furnace with oxygen-enriched nozzle | |
| CN204901753U (en) | Coal burner | |
| CN107990353A (en) | The jet nozzle of the soft combustion chamber of gas turbine | |
| CN111559877B (en) | Ultrahigh-temperature shaft kiln | |
| CN107860018A (en) | A kind of cement rotary kiln stove with coal dust pre-vaporized room | |
| CN114353064A (en) | Low-nitrogen coke oven gas and natural gas dual-purpose burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190412 |