CN109579009B - Burner device with low nitrogen oxide emission - Google Patents
Burner device with low nitrogen oxide emission Download PDFInfo
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- CN109579009B CN109579009B CN201910038374.5A CN201910038374A CN109579009B CN 109579009 B CN109579009 B CN 109579009B CN 201910038374 A CN201910038374 A CN 201910038374A CN 109579009 B CN109579009 B CN 109579009B
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- cavity
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000007789 gas Substances 0.000 claims abstract description 82
- 238000002485 combustion reaction Methods 0.000 claims abstract description 57
- 239000000779 smoke Substances 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 238000005192 partition Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 35
- 239000003546 flue gas Substances 0.000 claims description 35
- 230000007246 mechanism Effects 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 7
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 239000002737 fuel gas Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
Abstract
The present invention relates to a burner device with low nitrogen oxide emissions. A tubular gas chamber is arranged in the air pipe, and a multi-cavity premixer structure is formed on the outer cylindrical surface of the gas chamber through a gas partition plate and a gas spray hole; a central air pipe is arranged in the air pipe, a gas inlet is formed in the outer circular surface of the central air pipe, one end of the central air pipe is connected with a fire fan, and the other end of the central air pipe is provided with a fire burning head; the front end of the air pipe is provided with a secondary mixing device, and partial smoke in the hearth is sucked through an air inlet loop of the hearth of the secondary mixing device by the negative pressure effect formed by high-speed and high-temperature air flow at the front end of the air pipe; the air pipe is connected with the main fan, the main fan is connected with the air inlet duct, a smoke introducing cavity and an air introducing cavity are arranged in the air inlet duct, a two-stage air door is arranged at the lower part of the air introducing cavity, and the proportion of air and smoke quantity entering the main fan is adjusted through the two-stage air door. The invention realizes ultralow nitrogen combustion based on a stable design structure with two premixing, two blending, two air distribution, two regulation and one.
Description
Technical Field
The invention relates to a gas fuel burner matched with heat energy equipment, in particular to a burner device with low nitrogen oxide emission.
Background
The gas burner is widely used in various fields of national economy, with the continuous increase of the consumption of natural gas resources in China, the emission control of harmful gas is more and more strict, and natural gas is widely used for replacing coal and fuel oil, so that the gas burner becomes a main clean energy source. Furthermore, the national requirements for making a sound on the guard war of the blue sky put strict requirements on harmful components such as nitrogen oxides in the flue gas discharged by the burner, and the requirements are improved to be lower than 30mg/m in the areas such as Jinjin Ji 3 Is a low level of nitrogen oxide emissions. Compared with 150mg/m prescribed by the prior national standard 3 Has greatly improved and reaches the highest standard regulated in some developed countries in the current world. This not only places high standard stringent requirements on the users using the burner, but also challenges the burner development and manufacturing technology.
At present, the domestic ultralow nitrogen burner mainly depends on import, and the price is obviously higher than that of the conventional burner. Domestic burner manufacturers do not have a good grasp of the ultra-low nitrogen burner technology and lack products with a mature technology.
Disclosure of Invention
The invention aims to solve the technical problem of providing a burner device with low nitrogen oxide emission so as to realize ultralow nitrogen combustion.
The technical scheme adopted for solving the technical problems is as follows:
the burner device with low nitrogen oxide emission comprises a gas chamber, a wind pipe, a main fan, an air inlet duct and an ignition device, wherein the air inlet duct of the wind pipe is connected with the air outlet of the main fan, one side of a shell of the main fan is connected with the air inlet duct, the air inlet duct is divided into two chambers by a duct partition plate inside the air inlet duct, the two chambers are respectively a flue gas introducing cavity and an air introducing cavity, and the flue gas introducing cavity is communicated with a flue gas inlet arranged on the outer side face of the air inlet duct;
a tubular gas chamber is arranged in the air pipe, a plurality of long gas partition plates which are radially arranged are arranged on the outer cylindrical surface of the gas chamber, and the annular cavity between the gas chamber and the air pipe is divided into a plurality of premixing cavities with small volumes by the plurality of gas partition plates; the cylindrical surface of the gas chamber is uniformly provided with small-diameter gas spray holes, gas is sprayed into the middle of two adjacent gas partition plates through the gas spray holes, and is uniformly mixed with air and flue gas premixed air flow entering the air pipe, and sprayed out from the end part of the air pipe;
the air pipe is internally provided with a central air pipe which penetrates through the tubular gas chamber, the outer circular surface of the central air pipe is provided with a plurality of gas inlets for introducing gas in the gas chamber into the central air pipe, one end of the central air pipe is connected with a fire fan, and the fire fan sends combustion air into the central air pipe to be fully premixed with the gas entering the central air pipe; the other end of the central air pipe is provided with a flame stabilizing disc and an end face baffle, and the end face baffle and the flame stabilizing disc form an independent flame combustion head;
the front end of the air pipe is provided with a secondary mixing device which is of a venturi tube structure, the secondary mixing device forms an air inlet loop of the furnace chamber through the venturi tube structure and a taper sleeve structure at the front end of the air pipe, and partial flue gas in the furnace chamber is sucked through the air inlet loop of the furnace chamber through the negative pressure effect formed by high-speed and high-temperature air flow at the front end of the air pipe;
the lower part of the air introducing cavity is provided with a two-stage air door, the first-stage air door is positioned at the upper part of the smoke inlet, and the first-stage air door controls the total amount of combustion air and smoke entering the main fan; the secondary air door is positioned at the combustion air inlet part of the air introducing cavity and at the lower part of the smoke introducing cavity, controls the opening of the combustion air inlet, adjusts the negative pressure in the cavity between the two stages of air doors, changes the suction force of the smoke introducing cavity, and further adjusts the proportion of air and smoke quantity entering the main fan.
Compared with the prior art, the invention adopting the technical scheme has the beneficial effects that:
(1) In the air pipe, the annular premixing cavity for fuel gas, combustion air and flue gas is divided into at least dozens of small-volume premixing cavities. The chamber with small enough volume can ensure that the mixed gas can not backfire and flash explosion in the premixing cavity under the conditions of low-load operation of the burner and slow flow rate of the mixed gas, and the multi-cavity premixing structure ensures the safety of premixed combustion, eliminates the flash explosion risk and ensures that the burner can realize a large heat load regulation ratio. Meanwhile, the multi-cavity premixer structure can realize the full and uniform mixing of fuel gas, air and flue gas.
(2) At the tuber pipe front end, utilize venturi's principle, through secondary blending device, design into venturi formula mix the wind head with combustor anterior segment, utilize the negative pressure effect that high-temperature gas flow formed of high-speed flow, inhale the combustion head with the flue gas in the furnace, carry out secondary blending with air, gas, further reduce combustion temperature and combustion rate, and then effectively reduce the nitrogen oxide concentration that the burning produced.
(3) The center fire which independently runs is set in the center of the air pipe, the independent small fan is used for supplying combustion air, the premixing combustion mode is adopted, and the air is fully premixed with fuel gas in the fire burner and then is ignited. The flame stabilizing device at the front end of the fire burner ensures that the fire flame is firm and stable and is not blown out, ensures that the main flame is ignited at any time, and ensures that the main flame cannot be extinguished due to large smoke doping amount.
(4) By adopting the original two-stage air door serial structure, the ordered adjustment of combustion air and the doped smoke amount can be realized, so that the air and smoke adjustment becomes easier, the stable combustion is ensured, and unstable combustion or flameout caused by improper adjustment is avoided. And can guarantee in the combustion process that there is enough flue gas to mix all the time, realize low nitrogen burning, can not cut off the flue gas supply because of the human factor, lead to not realizing low nitrogen burning.
According to the burner designed and manufactured according to the technical scheme, the concentration of nitrogen oxides in the flue gas can be reduced to 30mg/m through test 3 The internal level reaches the ultra-low nitrogen oxide emission standard.
Further, the preferred scheme of the invention is as follows:
an ignition device for starting the ignition of the burner is arranged in the air pipe and at the rear part of the premixing cavity.
One end of the primary air valve shaft is provided with a rocker arm, the rocker arm is connected with a proportion adjusting mechanism through a first connecting rod, the proportion adjusting mechanism is an adjustable cam mechanism, and the rocker arm of the adjustable cam mechanism is connected with the connecting rod; one end of the secondary air valve shaft is connected with the auxiliary servo motor; the crank of the proportion adjusting mechanism is connected with a gas butterfly valve through a second connecting rod, the gas butterfly valve is connected with an electromagnetic valve group, and a cam rotating shaft is connected with a shaft of the main servo motor; the main servo motor and the auxiliary servo motor are electrically connected with the electric cabinet.
Drawings
FIG. 1 is a schematic view of a first embodiment of the present invention;
FIG. 2 is a view from A-A in FIG. 1;
FIG. 3 is a view in the direction B-B of FIG. 1;
FIG. 4 is a schematic view of a second embodiment of the present invention;
in the figure: 1. a secondary blending device; 2. an air duct; 3. a gas separation plate; 4. an ignition device; 5. a gas butterfly valve; 6. an electromagnetic valve group; 7. a proportion adjusting mechanism; 8. an electric control box; 9. an auxiliary servo motor; 10. an air inlet duct; 11. a rocker arm; 12. a connecting rod; 13. a fire seed fan; 14. a main fan; 15. a central air duct; 16. a gas jet orifice; 17. a fuel gas inlet; 18. a gas chamber; 19. a flame stabilizing disc; 20. an end face baffle; 21. an air inlet loop of the furnace chamber; 22. a premix chamber; 23. an air duct partition plate; 24. a flue gas inlet; 25. a primary air door; 26. a secondary air door; 27. a main servo motor; 28. a gas pipeline.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
The first embodiment is a low nitrogen oxide emission burner device of an integral structure in which the main fan 14 is directly connected to the air duct 2.
Referring to fig. 1, 2 and 3, a tubular gas chamber 18 is arranged in the air pipe 2, the tubular structure is of a variable-diameter tubular structure, the pipe diameter of the front section is thick, the pipe diameter of the rear section is thin, and the rear section pipe is connected with a gas pipeline 28. At least dozens of through-long gas partition plates 3 which are radially arranged are arranged on the outer cylindrical surface of the thick pipe section of the gas chamber 18, the annular cavity between the gas chamber 18 and the air pipe 2 is divided into a plurality of premixing cavities 22 with small volumes by the plurality of gas partition plates 3, and small-diameter gas spray holes 16 are uniformly formed on the starting end of the cylindrical surface of the thick pipe section, so that a multi-cavity premixer structure is formed inside the air pipe 2. The gas jet holes 16 jet gas into the middle of two adjacent gas partition plates 3, and the gas jet holes are evenly mixed with air and flue gas premixed air flow entering from the right end of the air pipe 2 and then jet from the left end of the air pipe 2. The gas separation plate 3 may be a flat plate or a corrugated plate, which can enhance the premixing effect.
A central air pipe 15 is arranged in the air pipe 2 along the central axis, the central air pipe 15 penetrates through a tubular gas chamber 18, a plurality of gas inlets 17 are formed in the outer circular surface of the central air pipe 15, gas in the gas chamber 18 is introduced into the central air pipe 15, one end of the central air pipe 15 is connected with a fire fan 13, and the fire fan 13 sends combustion air into the central air pipe 15 to be fully premixed with the gas entering the central air pipe 15; the other end of the central air pipe 15 is provided with a flame stabilizing disc 19 and an end face baffle 20, the end face baffle 20 and the flame stabilizing disc 19 form an independent flame burning head, and a stable flame can be formed locally to maintain stable burning of flame.
The front end of the air pipe 2 is provided with a secondary mixing device 1, the secondary mixing device 1 is of a venturi tube structure, and an air inlet loop 21 of the furnace chamber is formed by the venturi tube structure and a taper sleeve structure at the front end of the air pipe 2. The premixed combustible gas sprayed out by the multi-cavity premixer burns at the front end of the flame stabilizing disc 19, the flame and the high-temperature gas are rapidly sprayed out through the necking section of the venturi tube, a negative pressure effect is generated, part of smoke in the hearth is sucked in through the furnace cavity air inlet loop 21 and mixed with the flame and the combustible gas, and the burning speed and the burning temperature are further reduced.
The air inlet of the air pipe 2 is connected with the air outlet of the main fan 14, an impeller is arranged in the main fan 14, the impeller is directly arranged on a rotating shaft of a driving motor, one side of a shell of the main fan 14 is connected with the air inlet channel 10, the air inlet channel 10 is divided into two chambers by an air channel division plate 23 in the air inlet channel 10, the two chambers are respectively a flue gas introducing cavity and an air introducing cavity, and the flue gas introducing cavity is communicated with a flue gas inlet 23 arranged on the outer side surface of the air inlet channel 10; the lower part of the air introducing cavity is provided with two stages of air doors, a first stage air door 25 is positioned at the upper part of the smoke inlet 24, and the first stage air door 25 controls the total amount of combustion air and smoke entering the main fan 14; the secondary air door 26 is located at the combustion air inlet part of the air introducing cavity and at the lower part of the smoke introducing cavity, the secondary air door 26 controls the opening of the combustion air inlet, the negative pressure in the cavity between the two stages of air doors is regulated, the suction force of the smoke introducing cavity is changed, and the proportion of the air and the smoke amount entering the main fan 14 is regulated. And simultaneously, the auxiliary adjustment of the air excess coefficient can be realized.
In the embodiment, a rocker arm 11 is installed at one end of a primary air door 25 shaft, the rocker arm 11 is connected with a proportion adjusting mechanism 7 through a first connecting rod 12, the proportion adjusting mechanism 7 is an adjustable cam mechanism, and the rocker arm of the adjustable cam mechanism is connected with the connecting rod 12; one end of the shaft of the secondary air door 26 is connected with the auxiliary servo motor 9; the crank of the proportion adjusting mechanism 7 is connected with a gas butterfly valve 5 through a second connecting rod, the gas butterfly valve 5 is connected with an electromagnetic valve group 6, and a cam rotating shaft is connected with the shaft of a main servo motor 27; the main servo motor 27 and the auxiliary servo motor 9 are electrically connected with the electric cabinet 8, so that automatic adjustment of the two-stage air door is realized.
In this embodiment, an ignition device 4 is disposed inside the air duct 2 and behind the premixing chamber 22 for starting the ignition of the burner.
The second embodiment is a split-type low-nitrogen-oxide-emission burner device in which the main fan 14 is connected with the air duct 2 through a section of air duct. As shown in fig. 4, the primary damper 25 is located at the outlet of the main fan 14, and the secondary damper 26 is located at the flue gas inlet 24 on the side of the inlet duct 10 of the main fan 14.
The design points of the burner apparatus with low nox emissions described in the above two embodiments can be summarized as "two premix, two blend, two air distribution, two regulation, one stabilization", wherein:
1. two premixing:
(1) The main flame adopts a premixed combustion mode, namely, combustion air and main fuel gas are fully premixed before combustion. The function is as follows: firstly, by sufficient oxygen supply combustion, the generation amount of 'quick nitrogen oxides' is obviously eliminated; secondly, under the unfavorable conditions that a large amount of flue gas is doped into the mixed gas to reduce the combustion speed and obviously reduce the flame temperature, stable combustion can be kept by adopting a premixed combustion mode, and favorable conditions are created for reducing the generation of 'hot nitrogen oxides'.
(2) The flame type burner adopts an independent operation flame type, and the flame type also adopts a premixed combustion mode, specifically, an independent small-displacement fan is adopted to independently supply air to the flame type burner, and the air is fully premixed with fuel gas in the flame type burner and then ignited. The independent flame has the effect that when the main flame is unstable in combustion and has extinguishing risk due to the fact that a large amount of smoke is doped, the main flame is always ignited by virtue of the stable flame, so that the main flame is prevented from being extinguished greatly due to the doped smoke. The front end of the fire burner is provided with a flame stabilizing device, so that the fire flame is ensured not to be blown out by smoke in the main flame.
Compared with the mode of reducing nitrogen oxides by adopting staged combustion, the premixed combustion mode can obviously shorten the flame length, can keep reliable combustion at a lower flame temperature, has stable and short flame, and reduces the requirement on the size of a hearth. And the premix combustion mode also obviously reduces the generation concentration of 'quick nitrogen oxides'.
2. Two blends:
(1) Incorporation of flue gas from outside the burner: the burner burns the combustible gas, the generated high temperature smoke exchanges heat with heat exchange elements such as a boiler liner, a smoke pipe and the like of the boiler, the generated low temperature smoke is led out of the boiler, a part of smoke is sucked into the burner from an air inlet of a main fan of the burner, fully mixed with combustion air and the combustible gas, and then ignited for combustion. The main components of the flue gas are carbon dioxide, water vapor and nitrogen, which are all inert gases for preventing combustion, so that the combustion speed can be obviously reduced, and the flame temperature can be reduced. Therefore, the generation of 'thermal nitrogen oxides' can be obviously inhibited, and the method becomes a main measure for reducing the concentration of nitrogen oxides in the flue gas.
(2) Secondary incorporation of nitrogen oxides is performed in the furnace of the boiler: as the flue gas externally incorporated into the burner is not enough to reduce the concentration of nitrogen oxides to 30mg/m 3 The ultra-low nitrogen oxide level of the boiler also needs to adopt the measure of reducing nitrogen oxide of secondary doped flue gas in the boiler. The channel arranged at the front part of the burner utilizes the negative pressure effect generated by high-speed air flow in the burner to introduce and blend the hot furnace gas containing high-concentration incomplete combustion products in the hearth into combustion air, so that the combustion speed and flame temperature are further reduced, the generation amount of hot nitrogen oxides can be reduced, and the rapid generation amount can be reducedNitrogen oxides "formation.
The two-stage flue gas mixing realizes the great inhibition of the combustion temperature and the combustion speed, and realizes the combustion of ultralow-concentration nitrogen oxides. The two-stage flue gas mixing mode of external mixing and internal mixing is adopted for mixing in sequence, so that the total amount of flue gas mixing is increased, and the flame stability is ensured. Meanwhile, the internal mixing mode does not lead to the improvement of the back pressure of the hearth, and is beneficial to reducing the power consumption of a fan.
3. Two air distribution:
(1) The main fan is adopted to provide combustion air for the main flame of the burner, so that the full combustion of the main flame is ensured.
(2) The fire is distributed with air, and an independent small fan is adopted as a central fire to provide combustion air, so that the stable combustion of the fire is ensured.
4. Two adjustments:
(1) And adjusting the flow of the gas entering the inlet of the fan impeller by adopting a first-stage air door.
(2) The secondary air valve is adopted to adjust the proportion of combustion air entering the air inlet channel of the fan and externally doped smoke, and through the matching adjustment of the primary air valve and the secondary air valve, the concentration of nitrogen oxides in combustion products is ensured to reach the standard, the oxygen content in the smoke is ensured not to exceed the standard, and the dual indexes of energy conservation and environmental protection are achieved simultaneously for heat utilization equipment.
5. A stabilization:
in order to achieve the ultralow nitrogen oxide emission standard of the burner, a sufficient amount of flue gas is required to be doped into the pre-mixed gas by adopting a two-stage doping measure, the flue gas belongs to inert gas, the combustion speed is slow, the combustion is unstable and easy to extinguish, and meanwhile, the added flue gas can increase the flame flow speed to cause flame to lose fire, so that a flame stabilizing device is required to stabilize central flame, and the flame is ensured to be reliably combusted and not to be blown out.
The above embodiments are only for illustrating the technical solution of the present invention, but not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the present embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (1)
1. The utility model provides a combustor device of low nitrogen oxide emission, including gas chamber (18), tuber pipe (2), main fan (14), air inlet channel (10), ignition (4), the air outlet of main fan (14) is connected to the tuber pipe (2) air inlet, air inlet channel (10) is connected to one side of main fan (14) shell, air inlet channel (10) are inside to separate air inlet channel (10) into two cavities by wind channel division board (23), respectively for flue gas introducing cavity and air introducing cavity, flue gas introducing cavity communicates with flue gas inlet (24) that the air inlet channel (10) lateral surface set up; the method is characterized in that:
a tubular gas chamber (18) is arranged in the air pipe (2), a plurality of long gas partition plates (3) which are radially arranged are arranged on the outer cylindrical surface of the gas chamber (18), and the plurality of gas partition plates (3) divide an annular cavity between the gas chamber (18) and the air pipe (2) into a plurality of premixing cavities (22) with small volumes; the cylindrical surface of the gas chamber (18) is uniformly provided with small-diameter gas spray holes (16), gas is sprayed into the middle of two adjacent gas separation plates (3) through the gas spray holes (16), and is uniformly mixed with air and flue gas premixed air flow entering the air pipe (2) and sprayed out from the end part of the air pipe (2);
a central air pipe (15) is arranged in the air pipe (2), the central air pipe (15) penetrates through a tubular gas chamber (18), a plurality of gas inlets (17) are formed in the outer circular surface of the central air pipe (15), gas in the gas chamber (18) is introduced into the central air pipe (15), one end of the central air pipe (15) is connected with a fire fan (13), and the fire fan (13) sends combustion air into the central air pipe (15) to be fully premixed with the gas entering the central air pipe (15); the other end of the central air pipe (15) is provided with a flame stabilizing disc (19) and an end face baffle (20), and the end face baffle (20) and the flame stabilizing disc (19) form an independent flame burning head;
the front end of the air pipe (2) is provided with a secondary mixing device (1), the secondary mixing device (1) is of a venturi tube structure, the secondary mixing device (1) forms a furnace chamber air inlet loop (21) through the venturi tube structure and a taper sleeve structure at the front end of the air pipe (2), and part of flue gas in the furnace chamber is sucked through the furnace chamber air inlet loop (21) through the negative pressure effect formed by high-speed and high-temperature air flow at the front end of the air pipe (2);
the lower part of the air introducing cavity is provided with two stages of air doors, a first stage air door (25) is positioned at the upper part of the smoke inlet (24), and the first stage air door (25) controls the total amount of combustion air and smoke entering the main fan (14); the secondary air door (26) is positioned at the combustion air inlet part of the air introducing cavity and at the lower part of the smoke introducing cavity, the secondary air door (26) controls the opening size of the combustion air inlet, the size of negative pressure in the cavity between the two stages of air doors is regulated, the suction force on the smoke introducing cavity is changed, and the proportion of air and smoke quantity entering the main fan (14) is regulated;
an ignition device (4) for starting the ignition of the burner is arranged in the air pipe (2) and at the rear part of the premixing cavity (22);
one end of a shaft of the primary air door (25) is provided with a rocker arm (11), the rocker arm (11) is connected with a proportion adjusting mechanism (7) through a first connecting rod (12), the proportion adjusting mechanism (7) is an adjustable cam mechanism, and the rocker arm of the adjustable cam mechanism is connected with the connecting rod (12); one end of a secondary air door (26) shaft is connected with an auxiliary servo motor (9); the crank of the proportion adjusting mechanism (7) is connected with a gas butterfly valve (5) through a second connecting rod, the gas butterfly valve (5) is connected with an electromagnetic valve group (6), and a cam rotating shaft is connected with the shaft of a main servo motor (27); the main servo motor (27) and the auxiliary servo motor (9) are electrically connected with the electric cabinet (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038374.5A CN109579009B (en) | 2019-01-16 | 2019-01-16 | Burner device with low nitrogen oxide emission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910038374.5A CN109579009B (en) | 2019-01-16 | 2019-01-16 | Burner device with low nitrogen oxide emission |
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| CN109579009A CN109579009A (en) | 2019-04-05 |
| CN109579009B true CN109579009B (en) | 2024-01-26 |
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| CN110469847B (en) * | 2019-09-11 | 2024-03-26 | 江阴德尔热能机械有限公司 | Water-cooled fuel gas ultralow nitrogen combustion device |
| CN110805897B (en) * | 2019-10-31 | 2021-06-22 | 浙江百特燃烧器有限公司 | Flue gas backward flow formula combustor |
| CN112344328A (en) * | 2020-10-23 | 2021-02-09 | 郴州华峰能源科技有限公司 | Negative pressure nozzle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100810033B1 (en) * | 2006-11-27 | 2008-03-07 | 한국생산기술연구원 | A pre-mixing burner device for exhaust gas recirculation |
| CN205592954U (en) * | 2016-05-06 | 2016-09-21 | 北京佳德昌科技有限责任公司 | One -level gas injection type low NOx burner |
| CN106568083A (en) * | 2016-11-07 | 2017-04-19 | 北京航天石化技术装备工程有限公司 | Side wall low-nitric-oxide gas burner of cracking furnace |
| CN106989387A (en) * | 2017-02-22 | 2017-07-28 | 北京航空航天大学 | The low NOx gas burners of side wall fractional combustion and its combustion method |
| CN108105766A (en) * | 2017-11-30 | 2018-06-01 | 郑平安 | It is a kind of to realize low-nitrogen discharged burner and application method |
| CN108916865A (en) * | 2018-09-12 | 2018-11-30 | 南京博纳能源环保科技有限公司 | A kind of low nitrogen gas burner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6729874B2 (en) * | 2000-07-27 | 2004-05-04 | John Zink Company, Llc | Venturi cluster, and burners and methods employing such cluster |
-
2019
- 2019-01-16 CN CN201910038374.5A patent/CN109579009B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100810033B1 (en) * | 2006-11-27 | 2008-03-07 | 한국생산기술연구원 | A pre-mixing burner device for exhaust gas recirculation |
| CN205592954U (en) * | 2016-05-06 | 2016-09-21 | 北京佳德昌科技有限责任公司 | One -level gas injection type low NOx burner |
| CN106568083A (en) * | 2016-11-07 | 2017-04-19 | 北京航天石化技术装备工程有限公司 | Side wall low-nitric-oxide gas burner of cracking furnace |
| CN106989387A (en) * | 2017-02-22 | 2017-07-28 | 北京航空航天大学 | The low NOx gas burners of side wall fractional combustion and its combustion method |
| CN108105766A (en) * | 2017-11-30 | 2018-06-01 | 郑平安 | It is a kind of to realize low-nitrogen discharged burner and application method |
| CN108916865A (en) * | 2018-09-12 | 2018-11-30 | 南京博纳能源环保科技有限公司 | A kind of low nitrogen gas burner |
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|---|---|
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