CN113654082A - Constant-power low-nitrogen oxide ignition gun and using method thereof - Google Patents
Constant-power low-nitrogen oxide ignition gun and using method thereof Download PDFInfo
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- CN113654082A CN113654082A CN202111014843.3A CN202111014843A CN113654082A CN 113654082 A CN113654082 A CN 113654082A CN 202111014843 A CN202111014843 A CN 202111014843A CN 113654082 A CN113654082 A CN 113654082A
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 143
- 239000003034 coal gas Substances 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 71
- 239000003546 flue gas Substances 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 13
- 239000012530 fluid Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
- F23Q3/008—Structurally associated with fluid-fuel burners
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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
- F23D14/20—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
-
- 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
- F23D2207/00—Ignition devices associated with burner
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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 relates to the field of combustion equipment characterized by configuration or installation of a combustor, in particular to a constant-power low-nitrogen oxide ignition gun and a using method thereof. The utility model provides a constant power low nitrogen oxide burning torch, includes ignition detection electrode (1), electrode sparking plum blossom head (13) and electrode pole (14), characterized by: the coal gas burner also comprises an air and coal gas integrated block (2), a coal gas interface perforated plate (3), an air interface perforated plate (4), a coal gas channel (5), an air channel (6), an air secondary orifice plate (7), a coal gas secondary orifice plate (8), primary air (9), secondary air (10), a primary combustion cavity (11) and a secondary combustion cavity (12). A method for using a constant-power low-nitrogen oxide ignition gun is characterized in that: the method is implemented in sequence according to the following steps: firstly, burning for the first time; and ② secondary combustion. The invention has stable combustion and reduced emission.
Description
Technical Field
The invention relates to the field of combustion equipment characterized by configuration or installation of a combustor, in particular to a constant-power low-nitrogen oxide ignition gun and a using method thereof.
Background
With the improvement of national environmental protection requirements, nitrogen oxide (generally called NO) discharged by flue gas of heating furnacex) The discharge index is more and more emphasized, and NO in the combustion product flue gas of the burnerxIs one of the main environmental control indexes.
The high-power burner is generally provided with a pilot flame burning torch, and when the burner power required by the heating furnace is low, the burning torch can be directly used as the burner. The combustion stability of the ignition gun directly influences the work of the main burner, in order to enable the ignition gun to stably burn, the air-fuel ratio of air and coal gas of the ignition gun needs to be fixed, the conventional method is that the air and coal gas supply of the ignition gun is separated from the air and coal gas of the main burner, or a pressure stabilizing valve is installed on an air and coal gas pipeline of the ignition gun, and when the pressure fluctuation of the pipeline is not large, a throttling orifice plate can be installed on the air and coal gas pipeline of the ignition gun.
The nozzle of the burning torch works in a high-temperature environment for a long time, so that the burning loss caused by oxidation is serious, the material of the air nozzle or the gas nozzle is aged, the nozzle is larger and larger, the flow and the air-fuel ratio of air and gas can be changed, the burning of flame is influenced, and in the serious condition, the phenomena of flameout, tempering and the like can occur, and the normal operation of the nozzle is influenced.
In addition, under the condition of increasingly strict current environmental protection requirements, the NO of the ignition gun is reducedxThe value is also becoming more and more important.
Disclosure of Invention
The invention discloses a constant-power low-nitrogen oxide ignition gun and a using method thereof, aiming at overcoming the defects of the prior art and providing combustion equipment with stable combustion and reduced emission.
The invention achieves the purpose by the following technical scheme:
the utility model provides a constant power low nitrogen oxide burning torch, includes the ignition detection electrode, electrode sparking plum blossom head and electrode pole, the both ends of electrode pole, characterized by are located respectively to ignition detection electrode and electrode sparking plum blossom head: also comprises an air and gas integrated block, a gas interface perforated plate, an air interface perforated plate, a gas channel, an air secondary orifice plate, a gas secondary orifice plate, air primary air, air secondary air, a primary combustion cavity and a secondary combustion cavity,
the middle part of the air gas manifold block is sequentially provided with a gas channel, a primary combustion chamber and a secondary combustion chamber from the front part to the rear part, the front end of the gas channel is arranged on the front end surface of the air gas manifold block, the rear end of the gas channel is communicated with the front end of the primary combustion chamber, the rear end of the primary combustion chamber is communicated with the front end of the secondary combustion chamber, the rear end of the secondary combustion chamber is arranged on the rear end surface of the air gas manifold block,
the air channel is sleeved outside the gas channel and the primary combustion cavity,
the inner end of the ignition detection electrode is attached to the front end face of the air and gas integrated block, the electrode sparking plum blossom head is arranged on the rear end face of the primary combustion cavity, the electrode rod is sequentially arranged in the gas channel, the primary combustion cavity and the secondary combustion cavity in a penetrating way,
an air secondary throttle orifice plate is hooped on the outer side surface of the gas channel, a gas secondary throttle orifice plate is arranged on the inner side surface of the primary combustion cavity, air primary air is arranged on the side wall of the primary combustion cavity, air secondary air is hooped on the outer side surface of the rear end of the primary combustion cavity,
the side wall of the air and gas integrated block is provided with a gas interface perforated plate, and the side wall of the air channel is provided with an air interface perforated plate.
The constant-power low-nitrogen oxide ignition gun is characterized in that:
the air secondary throttling orifice plate, the coal gas secondary throttling orifice plate and the air secondary air all adopt a circular seam throttling structure, and airflow is distributed around flame, so that the mixing is more uniform and the combustion is more stable;
the primary air adopts a structure with a plurality of circumferential rows of small holes, so that the air flows into the primary combustion cavity through the small holes and is gradually mixed with the coal gas, the temperature of a secondary nozzle of the coal gas is low, the concentration of the coal gas is high, and the tempering is avoided;
the air gas integrated block has the function of changing the parallel of the air gas pipeline into an inner sleeve pipe and an outer sleeve pipe, so that the space is saved, and the air gas integrated block is more favorable for uniformly mixing air flow.
The use method of the constant-power low-nitrogen oxide ignition gun is characterized in that: the method is implemented in sequence according to the following steps:
firstly, burning: air enters the air channel from the air interface perforated plate, the air entering the air channel is divided into a first part of air and a second part of air, the first part of air enters the primary combustion cavity through the secondary orifice plate and the primary air, and the second part of air enters the secondary combustion cavity through the secondary air; the coal gas enters the coal gas channel from the coal gas interface perforated plate and then enters the primary combustion chamber; the proportion of the coal gas in the primary combustion chamber and the first part of air is in an excess combustion state, an ignition detection electrode enables an electrode ignition quincuncial head to be excited to ignite through an electrode rod, and the first part of air and the coal gas in the primary combustion chamber are ignited;
secondly, secondary combustion: and the flue gas and the excess coal gas which are combusted in the primary combustion cavity enter the secondary combustion cavity, and the excess coal gas and the second part of air are ignited by the flame of the primary combustion cavity and continuously combusted in the secondary combustion cavity.
The use method of the constant-power low-nitrogen oxide ignition gun is characterized in that: in the first step, the volume ratio of the first part of air to the second part of air is 25-75%.
The working principle of the invention is as follows:
the primary air throttling element utilizes the critical pressure phenomenon of the flow limiting orifice plate to realize that the pressure and the flow of air are not changed after the air flows through the flow limiting orifice plate. The restriction orifice plate, which functions as a restriction, utilizes the fluid blocking effect. When the pressure drop before and after the restriction orifice plate exceeds a certain value (namely critical pressure drop), the flow velocity of the fluid flowing through the restriction orifice plate reaches sonic velocity, and no matter how to reduce the outlet pressure, as long as the pressure at the upstream of the restriction orifice plate keeps a certain value, the fluid flow will maintain a certain value and not increase any more. On the contrary, when the pressure at the downstream of the restriction orifice plate is kept constant, the pressure at the upstream of the restriction orifice plate exceeds the critical pressure, and the flow speed at the restriction orifice plate is not changed any more, so that the influence of pressure fluctuation at the front of the restriction orifice plate on combustion is filtered.
The air secondary orifice plate is used for buffering and allocating the pressure of an air channel, so that the distribution of air between a primary combustion chamber and a secondary combustion chamber is more accurate and controllable, and the aperture of a primary combustion air throttling element and the aperture of the air secondary orifice plate are enlarged by high temperature in the combustion process, so that the total resistance of the whole air loop is reduced, but the total air flow cannot be continuously increased due to the critical pressure design of the air primary throttling element, and the combustion stability is ensured.
The working principle of the primary throttling element and the primary combustion gas throttling element of the gas pipeline is similar to that of the corresponding throttling element of air, but the pressure of a gas channel is generally stable, the pressure of the gas channel is low and cannot reach the critical pressure, and the design of the secondary throttling element can also play an obvious role in limiting and stabilizing the current.
The combustion technique in which the air required for combustion is fed into the combustion chamber in two stages is called air staged combustion. The first-stage air, namely the first part of air, enters the primary combustion chamber through the primary combustion air throttling element, (alpha <), all fuel, namely coal gas, is sent into the primary combustion chamber through the primary combustion coal gas throttling element to be subjected to fuel over-rich combustion, and the rest air, namely the second part of air, is used as the second-stage air, namely the second part of air, and is sent into the secondary combustion chamber through the air secondary throttling orifice plate at the downstream of flame, so that the fuel is completely combusted.
Because of relative insufficient oxygen content in the primary combustion chamber, the combustion speed and temperature level are reduced, and the thermal NO isxReduction; the nitrogen-containing compounds in the fuel are decomposed to generate a large amount of intermediate products, a part of NO is reduced, and the fuel type NO is inhibitedxGenerating; the oxygen content in the secondary combustion chamber is sufficient, but the temperature is low, and excessive NO can not be generatedx(ii) a Thus NO in the combustion productsxGreatly reducing the cost.
The throttling element of the primary combustion nozzle enables the flame of the primary combustion to have certain rigidity, the electrode ignition quincuncial head is ignited at the position, and the flame signal is detected.
The burner parameters are shown in the following table:
test conditions of the invention:
the simulated air fluctuates between 0.05MPa and 0.5MPa, when the coal gas is changed between 1kPa and 5kPa, the combustion is normal, the flame length is almost unchanged, and the signal intensity is stable between 5 and 6. The air flow fluctuates by 20 percent and the gas flow fluctuates by 30 percent.
The invention has the following beneficial effects:
the invention can resist large-amplitude pipeline pressure fluctuation in the combustion process by arranging the pressure stabilizing device on the ignition gun, and simultaneously, the invention is combined with the staged combustion structure to ensure stable combustion and NO emission of flue gasxGreatly reduced. In the using process, when the spray head is oxidized and burned out and the aperture is enlarged, the flow rate can not be changed, and the constant air-fuel ratio is continuously kept, so that the service life of the ignition gun is prolonged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
A constant-power low-nitrogen oxide ignition gun comprises an ignition detection electrode 1, an air gas integrated block 2, a gas interface perforated plate 3, an air interface perforated plate 4, a gas channel 5, an air channel 6, an air secondary orifice plate 7, a gas secondary orifice plate 8, an air primary air 9, an air secondary air 10, a primary combustion cavity 11 and a secondary combustion cavity 12, and as shown in figure 1, the specific structure is as follows:
the electrode sparking head 13 and the electrode rod 14, the ignition detection electrode 1 and the electrode sparking head 13 are respectively arranged at two ends of the electrode rod 14;
the middle part of the air gas manifold block 2 is provided with a gas channel 5, a primary combustion chamber 11 and a secondary combustion chamber 12 in sequence from the front part to the rear part, the front end of the gas channel 5 is arranged on the front end surface of the air gas manifold block 2, the rear end of the gas channel 5 is communicated with the front end of the primary combustion chamber 11, the rear end of the primary combustion chamber 11 is communicated with the front end of the secondary combustion chamber 12, the rear end of the secondary combustion chamber 12 is arranged on the rear end surface of the air gas manifold block 2,
the air channel 6 is sleeved outside the gas channel 5 and the primary combustion cavity 11,
the inner end of the ignition detection electrode 1 is attached to the front end face of the air and gas integrated block 2, the electrode sparking head 13 is arranged on the rear end face of the primary combustion cavity 11, the electrode rod 14 is sequentially arranged in the gas channel 5, the primary combustion cavity 11 and the secondary combustion cavity 12 in a penetrating way,
an air secondary throttling pore plate 7 is hooped on the outer side surface of the gas channel 5, a gas secondary throttling pore plate 8 is arranged on the inner side surface of the primary combustion chamber 11, air primary air 9 is arranged on the side wall of the primary combustion chamber 11, air secondary air 10 is hooped on the outer side surface of the rear end of the primary combustion chamber 11,
the side wall of the air and gas integrated block 2 is provided with a gas interface perforated plate 3, and the side wall of the air channel 6 is provided with an air interface perforated plate 4.
In this embodiment:
the air secondary orifice plate 27, the coal gas secondary orifice plate 28 and the air secondary air 30 all adopt a circular seam throttling structure, and airflow is distributed around flame, so that the mixing is more uniform and the combustion is more stable;
the primary air 29 adopts a structure with a plurality of circumferential rows of small holes, so that air flows into the primary combustion chamber 31 through the small holes and is gradually mixed with the coal gas, the temperature of a secondary nozzle of the coal gas is low, the concentration of the coal gas is high, and tempering is avoided;
the air gas integrated block 22 has the function of changing the parallel of the air gas pipeline into an inner sleeve pipe and an outer sleeve pipe, thereby saving space and being more beneficial to uniformly mixing air flow.
When the method is used, the steps are implemented in sequence as follows:
firstly, burning: air enters an air channel 6 from an air interface perforated plate 4, the air entering the air channel 6 is divided into a first part of air and a second part of air, the first part of air enters a primary combustion chamber 11 through a secondary orifice plate 7 and primary air 9, the second part of air enters a secondary combustion chamber 12 through secondary air 10, and the volume ratio of the first part of air to the second part of air is 25-75%; the coal gas enters the coal gas channel 5 from the coal gas interface perforated plate 3 and then enters the primary combustion chamber 11; the proportion of the gas in the primary combustion cavity 11 and the first part of air is in an excess combustion state, the ignition detection electrode 1 enables an electrode ignition quincuncial head 13 to be excited and ignited through an electrode rod 14, and the first part of air and the gas in the primary combustion cavity 11 are ignited;
secondly, secondary combustion: the flue gas and the surplus gas after the combustion in the primary combustion chamber 11 enter the secondary combustion chamber 12, and the surplus gas and the second part of air are ignited by the flame of the primary combustion chamber 11 and continue to combust in the secondary combustion chamber 12.
The working principle of the embodiment is as follows:
the primary air throttling element 2 utilizes the phenomenon of critical pressure of the restriction orifice plate to realize that the pressure and the flow of air are not changed after the air flows through the restriction orifice plate. The restriction orifice plate, which functions as a restriction, utilizes the fluid blocking effect. When the pressure drop before and after the restriction orifice plate exceeds a certain value (namely critical pressure drop), the flow velocity of the fluid flowing through the restriction orifice plate reaches sonic velocity, and no matter how to reduce the outlet pressure, as long as the pressure at the upstream of the restriction orifice plate keeps a certain value, the fluid flow will maintain a certain value and not increase any more. On the contrary, when the pressure at the downstream of the restriction orifice plate is kept constant, the pressure at the upstream of the restriction orifice plate exceeds the critical pressure, and the flow speed at the restriction orifice plate is not changed any more, so that the influence of pressure fluctuation at the front of the restriction orifice plate on combustion is filtered.
The air secondary orifice 7 is used for buffering and adjusting the pressure of the air channel 6, so that the distribution of air between the primary combustion chamber 11 and the secondary combustion chamber 12 is more accurate and controllable, and the aperture of the primary combustion air orifice 6 and the aperture of the air secondary orifice 7 are enlarged by high temperature in the combustion process, so that the total resistance of the whole air loop is reduced, but the total air flow cannot be continuously increased due to the critical pressure design of the air primary orifice 2, so that the combustion stability is ensured.
The working principle of the primary throttling element 9 and the primary combustion gas throttling element 10 of the gas pipeline is similar to that of the corresponding throttling element of air, but the pressure of the gas channel 5 is generally stable, the pressure of the gas channel 5 is lower and can not reach the critical pressure, and the design of the secondary throttling element can play an obvious role in limiting and stabilizing the current.
The combustion technique in which the air required for combustion is fed into the combustion chamber in two stages is called air staged combustion. The primary air, namely the first part of air, enters the primary combustion chamber 11 through the primary combustion air throttling element 6, alpha is less than 1, all fuel, namely coal gas, is sent into the primary combustion chamber 11 through the primary combustion coal gas throttling element 10 to be subjected to fuel over-rich combustion, and the rest air, namely the second part of air, is used as the second-stage air, namely the second part of air, and is sent into the secondary combustion chamber 12 through the air secondary throttling orifice 7 at the downstream of flame, so that the fuel is completely combusted.
Because of relative insufficient oxygen content in the primary combustion chamber 11, the combustion speed and temperature level are reduced, and the thermal NO isxReduction; the nitrogen-containing compounds in the fuel are decomposed to generate a large amount of intermediate products, a part of NO is reduced, and the fuel type NO is inhibitedxGenerating; the oxygen in the secondary combustion chamber 12 is sufficient, but the temperature is low and NO is not excessively generatedx(ii) a Thus NO in the combustion productsxGreatly reducing the cost.
The primary combustion orifice throttling element 12 imparts a certain rigidity to the primary combustion flame, where the electrode sparking plum 13 ignites and detects the flame signal.
The burner parameters are shown in the following table:
test conditions of this example:
the simulated air fluctuates between 0.05MPa and 0.5MPa, when the coal gas is changed between 1kPa and 5kPa, the combustion is normal, the flame length is almost unchanged, and the signal intensity is stable between 5 and 6. The air flow fluctuates by 20 percent and the gas flow fluctuates by 30 percent.
Claims (4)
1. The utility model provides a constant power low nitrogen oxide burning torch, includes ignition detection electrode (1), electrode sparking plum blossom head (13) and electrode pole (14), and the both ends of electrode pole (14), characterized by are located respectively to ignition detection electrode (1) and electrode sparking plum blossom head (13): also comprises an air and gas integrated block (2), a gas interface perforated plate (3), an air interface perforated plate (4), a gas channel (5), an air channel (6), an air secondary orifice plate (7), a gas secondary orifice plate (8), primary air (9), secondary air (10), a primary combustion chamber (11) and a secondary combustion chamber (12),
the middle part of the air gas manifold block (2) is sequentially provided with a gas channel (5), a primary combustion chamber (11) and a secondary combustion chamber (12) from the front part to the rear part, the front end of the gas channel (5) is arranged on the front end surface of the air gas manifold block (2), the rear end of the gas channel (5) is communicated with the front end of the primary combustion chamber (11), the rear end of the primary combustion chamber (11) is communicated with the front end of the secondary combustion chamber (12), the rear end of the secondary combustion chamber (12) is arranged on the rear end surface of the air gas manifold block (2),
the air channel (6) is sleeved outside the gas channel (5) and the primary combustion chamber (11),
the inner end of the ignition detection electrode (1) is attached to the front end face of the air-gas manifold block (2), the electrode sparking plum head (13) is arranged on the rear end face of the primary combustion cavity (11), the electrode rod (14) is sequentially arranged in the gas channel (5), the primary combustion cavity (11) and the secondary combustion cavity (12) in a penetrating manner,
an air secondary throttling pore plate (7) is hooped on the outer side surface of the gas channel (5), a gas secondary throttling pore plate (8) is arranged on the inner side surface of the primary combustion cavity (11), air primary air (9) is arranged on the side wall of the primary combustion cavity (11), air secondary air (10) is hooped on the outer side surface of the rear end of the primary combustion cavity (11),
the side wall of the air and gas integrated block (2) is provided with a gas interface perforated plate (3), and the side wall of the air channel (6) is provided with an air interface perforated plate (4).
2. The constant power low nox ignition gun of claim 1, wherein:
the air secondary throttling orifice plate (7), the coal gas secondary throttling orifice plate (8) and the air secondary air (10) all adopt a circular seam throttling structure;
the primary air (9) adopts a structure with a plurality of circumferential rows of small holes;
the air and gas integrated block (2) is of an inner and outer sleeve type structure.
3. The method of using a constant power low nox ignition gun as claimed in claim 1 or 2, wherein: the method is implemented in sequence according to the following steps:
firstly, burning: air enters an air channel (6) from an air interface perforated plate (4), the air entering the air channel (6) is divided into a first part of air and a second part of air, the first part of air enters a primary combustion chamber (11) through a secondary throttle orifice plate (7) and primary air (9), and the second part of air enters a secondary combustion chamber (12) through secondary air (10); the coal gas enters the coal gas channel (5) from the coal gas interface perforated plate (3) and then enters the primary combustion chamber (11); the proportion of the coal gas in the primary combustion cavity (11) and the first part of air is in an excess combustion state, the ignition detection electrode (1) enables an electrode ignition quincuncial head (13) to be excited and ignited through an electrode rod (14), and the first part of air and the coal gas in the primary combustion cavity (11) are ignited;
secondly, secondary combustion: the flue gas and the surplus coal gas after combustion in the primary combustion chamber (11) enter the secondary combustion chamber (12), and the surplus coal gas and the second part of air are ignited by the flame of the primary combustion chamber (11) to continue to combust in the secondary combustion chamber (12).
4. The method of using a constant power low nox ignition gun as claimed in claim 3, wherein: in the first step, the volume ratio of the first part of air to the second part of air is 25-75%.
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| CN202111014843.3A CN113654082B (en) | 2021-08-31 | 2021-08-31 | Constant-power low-nitrogen oxide ignition gun and use method thereof |
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| CN202111014843.3A CN113654082B (en) | 2021-08-31 | 2021-08-31 | Constant-power low-nitrogen oxide ignition gun and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704236A (en) * | 2021-12-28 | 2022-07-05 | 中国石油天然气集团有限公司 | Ignition burner and ignition method for underground coal gasification |
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| CN113654082B (en) | 2023-11-17 |
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