CN115342377A - Ignition device and boiler using same - Google Patents
Ignition device and boiler using same Download PDFInfo
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- CN115342377A CN115342377A CN202210987298.4A CN202210987298A CN115342377A CN 115342377 A CN115342377 A CN 115342377A CN 202210987298 A CN202210987298 A CN 202210987298A CN 115342377 A CN115342377 A CN 115342377A
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- gas nozzle
- air
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- 239000007789 gas Substances 0.000 claims abstract description 86
- 238000002485 combustion reaction Methods 0.000 claims abstract description 31
- 239000002737 fuel gas Substances 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 26
- 239000007924 injection Substances 0.000 claims description 26
- 230000008602 contraction Effects 0.000 claims description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 239000003345 natural gas Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q9/00—Pilot flame igniters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses an ignition device, which relates to an ignition device of a boiler combustion chamber and solves the problem that the existing ignition device can not automatically adjust the ratio of fuel gas and air, and the technical scheme main points are as follows: an ignition device comprising an ignition section and a fuel section; the fuel section can be used for mixing fuel gas and air in proportion and then sending the mixture to the ignition section; the ignition section is used for generating spark to ignite the fuel gas. The purpose of keeping a certain proportion of gas and air is achieved.
Description
Technical Field
The present invention relates to an ignition device, and more particularly, to a gas ignition device for a boiler and a boiler using the same.
Background
At present, the boiler industry has two main ignition modes, one is a main valve opening direct big fire ignition mode, and air and fuel gas form combustible mixed gas through a fuel gas main valve and a Venturi tube. One is a small fire ignition mode, which is to take a small amount of gas from a gas pipeline and a small amount of air from an air inlet pipeline, enter an ignition device to be randomly mixed and enter an ignition cylinder in a combustion chamber, and open a gas main valve to conduct fire after the small fire is successfully ignited so as to ignite main flames of the combustion chamber. The main valve is opened to directly ignite with big fire, so that the explosion easily occurs, and the risk of exploding the combustion chamber is caused. In the small fire ignition mode, the existing ignition device cannot control the ratio of gas to air, a valve needs to be manually adjusted to control the ratio of gas to air, and operators need to have rich experience; the distance between the ignition needle and the grounding electrode cannot be adjusted, so that the spark is not generated sufficiently. If the above problem cannot be solved, the failure rate of ignition is high.
Disclosure of Invention
In a first aspect, the present invention is directed to an ignition device for automatically controlling the fuel to air ratio.
The technical purpose of the invention is realized by the following technical scheme: an ignition device comprising an ignition section and a fuel section; the fuel section can mix fuel gas and air according to a fixed proportion by using an injection principle and then send the mixture into the ignition section; the ignition section is used for generating spark to ignite the fuel gas.
Through the arrangement, the proportion of the fuel gas and the air is relatively fixed, so that the ignition requirement can be met. The success rate of Gao Xiaohuo ignition can be greatly improved. Meanwhile, under the condition that need keep the small fire, the small fire that keeps that above-mentioned setting can be better prevents that air and gas proportion from stirring, leads to the problem that the small fire extinguishes.
Further, a fixed block is included; the fuel section comprises a gas nozzle and an air suction port which are arranged on the fixed block, and a contraction cavity which is arranged in the fixed block; the gas nozzle comprises a gas nozzle which is communicated with the contraction cavity; the air suction port is communicated with the contraction cavity; the ignition section comprises an injection pipe arranged on the fixed block and a burner arranged on the injection pipe; the injection pipe is communicated with the contraction cavity; the ignition needle is arranged in the injection pipe; the ignition needle is used for being matched with the burner to generate sparks.
The gas is sprayed into the contraction cavity through the gas nozzle under the action of pressure, and negative pressure is formed in the contraction cavity at the moment due to the injection principle; under the action of negative pressure, air enters the contraction cavity through the air suction opening, so that gas and air can be mixed. The mixed gas enters the injection pipe for further mixing, and when passing through the burner, sparks are generated under the cooperation of the ignition needle, so that the gas is ignited.
Further, the diameter of the contraction cavity gradually contracts along the gas injection direction.
Further, the diameter d of the gas nozzle satisfies the following calculation formula,
in the formula: d is the diameter of the gas nozzle; q is the design natural gas flow; k is a gas nozzle correction coefficient;
wherein
In the formula: v is the flow velocity at the gas nozzle; t is a Is the air temperature; t is g Is the gas temperature; p g Absolute pressure of fuel gas; p is a Is the absolute pressure of air; delta P g The relative pressure in front of the gas nozzle; rho g Density of the fuel gas;
the maximum diameter of the contraction cavity satisfies the following calculation formula,
V 1 ＝αqV 0
in the formula: a is the excess air coefficient, and can be 1.05; v 0 Is 1Nm 3 The theoretical air requirement of natural gas can be 9.575; v 1 Actual air intake;
m v ＝V 1 /q
m m ＝(ρ a V 1 )/(ρ g g)+1
in the formula: m is v The injection ratio is volume; m is m Mass injection ratio;
Φ＝m m m v δ
in the formula: phi is the structural coefficient of the mixing section; delta is the shape coefficient of the ejector, and can be 0.95;
diameter D of the air suction opening 2 The following calculation formula is satisfied,
through the arrangement, the gas and the air can be kept in a reasonable proportion; the ratio is determined by the theoretical requirement of natural gas and the required air excess factor, which can be selected.
Further, the gas nozzle comprises an adjusting mechanism; the adjusting mechanism comprises an adjusting rod and a displacement mechanism; the top end of the adjusting rod is a conical surface; the top end of the adjusting rod is matched with the gas nozzle; the adjusting rod can be far away from or close to the gas nozzle under the driving of the displacement mechanism.
Driven by the displacement mechanism, the adjusting rod is far away from or close to the gas nozzle; and then the distance between the conical surface at the top end of the adjusting rod and the gas nozzle is driven, and the effect of adjusting the flow entering the gas nozzle is achieved due to the small hole throttling effect.
Further, the displacement mechanism includes an adjustment screw; the adjusting rod is connected with the adjusting screw; the adjusting screw is in threaded fit with the nozzle.
The distance between the adjusting rod and the gas nozzle can be conveniently adjusted through the adjusting screw.
Further, an insulating layer is arranged outside the ignition needle; the ignition needle adjusting mechanism is also included; the ignition needle adjusting mechanism comprises an adjusting nut; the adjusting nut is sleeved on the insulating layer; the adjusting nut is in threaded fit with the fixed block; the ignition needle can be far away from or close to the burner through the adjusting nut.
The ignition needle can be close to or far away from the burner under the action of the adjusting nut so as to achieve the effect of better sparking.
Furthermore, an air suction port is formed in the fixed block; the air suction opening is in communication with the contraction cavity.
Furthermore, the nozzle is made of red copper.
The red copper has the characteristic of high heat conductivity coefficient, and can quickly exchange heat with air, so that the heat brought by a combustion chamber is quickly reduced.
Furthermore, the fixed block is made of LF21 antirust aluminum.
The stainless steel 316L material is adopted, and the high-temperature resistant and smoke corrosion resistant stainless steel has the characteristics of high temperature resistance and smoke corrosion resistance.
In a second aspect, the present invention provides a boiler using the ignition device of any one of the above aspects; the boiler comprises a combustion chamber; a combustor is arranged in the combustion chamber; the ignition device is arranged outside the combustor.
The invention provides an ignition device, which can keep a certain proportion of gas and air no matter how the gas flow changes. Resulting in a higher ignition success rate.
Drawings
FIG. 1 is a schematic view of an ignition device according to an embodiment
FIG. 2 is a sectional view of an ignition device in accordance with example 1
FIG. 3 is a schematic diagram of an embodiment
In the figure: 1. an ignition device; 11. a fixed block; 111. a first air suction opening; 112. a second air suction opening; 113. a contracting cavity; 12. a gas nozzle; 121. an adjusting screw; 122. adjusting a rod; 123. a gas nozzle; 13. an air tube; 14. an injection pipe; 15. burning a nozzle; 16. an ignition needle; 161. an insulating layer; 162. adjusting the nut; 21. a combustion chamber; 22. a barrel; 23. a burner; 231. a connecting portion; 232. a combustion section; 24. a fan; 241. a venturi tube; 242. an air filter element; 243. a gas pipeline.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly or indirectly connected to the other element, and the "connection" does not limit the fixed connection or the movable connection, and the specific connection mode should be determined according to the specific technical problem to be solved.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed or operated in a particular orientation, and is not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example (b):
the gas concentration in the mixed gas is within a certain range, and the possibility of ignition is provided. Among all the failure causes of ignition failure, the mixing ratio of air and gas is not in the ignition interval, which becomes the most main factor of failure. In the prior art, an air valve and a fuel gas valve of the ignition device 1 need to be adjusted manually, and the human factor is large. In order to solve the above problems, the present embodiment provides an ignition device 1, which can make the ratio of air and gas relatively fixed by means of mechanical structure. The problem of ignition failure caused by improper air-gas ratio due to manual adjustment is avoided.
The ignition device 1 comprises an ignition section and a fuel section; the fuel section can be used for mixing fuel gas and air in proportion and then sending the mixture to the ignition section; the ignition section is used for generating spark to ignite the fuel gas.
The fuel section comprises a gas nozzle 12 and an air suction opening which are arranged on the fixed block 11, and a contraction cavity 113 which is arranged in the fixed block 11; the contraction cavity 113 gradually decreases in diameter in the gas traveling direction. The gas nozzle 12 is in threaded fit with the fixed block 11, so that the gas nozzle 12 is connected with the fixed block 11; the gas nozzle 12 is provided with a gas inlet which is connected with a gas pipeline; the gas nozzle 12 is also provided with a gas spout 123; the gas jets 123 communicate with the gas inlet through the nozzle cavity. The gas nozzle 123 is disposed in the middle of the contraction cavity 113 along the axial direction of the contraction cavity 113.
The gas nozzle 12 comprises an adjustment mechanism; the adjusting mechanism comprises an adjusting rod 122 and a displacement mechanism; the top end of the adjusting rod 122 is a conical surface; the top end of the adjusting rod 122 is matched with the gas nozzle 123; the adjusting rod 122 can be far away from or close to the gas nozzle 123 under the driving of the displacement mechanism. The displacement mechanism includes an adjustment screw 121; the adjusting rod 122 is connected with the adjusting screw 121; the adjustment screw 121 is threadedly engaged with the nozzle.
The fixed block 11 is also provided with an air suction port which is communicated with the contraction cavity 113; the air suction opening comprises a first air suction opening 111 and a second air suction opening 112. Also comprises an air pipe 13; the air pipe 13 is in threaded connection with the fixed block 11; one end of the air pipe 13 is communicated with the air suction port, and the other end is installed to be communicated with the combustion chamber 21. The high temperature fresh air in the combustion chamber 21 can enter the contraction cavity 113 through the air pipe 13. The second air suction opening 112 serves as a backup air suction opening. When in standby, the second air suction port 112 is blocked by a plug; the plug is in threaded connection with the fixed block 11; in use, the second air suction opening 112 is in air communication with the exterior of the boiler combustion chamber 21.
The ignition section comprises an injection pipe 14 arranged on the fixed block 11 and a burner 15 arranged on the injection pipe 14; the injection pipe 14 communicates with the contraction cavity 113; an ignition needle 16 disposed within the injection tube 14; the ignition needle 16 is used to generate a spark in cooperation with the burner 15. The injection pipe 14 is connected with the fixed block 11 through thread fit. An insulating layer 161 is arranged outside the ignition needle 16; an ignition needle 16 adjusting mechanism is also included; the ignition needle 16 adjustment mechanism includes an adjustment nut 162; the adjusting nut 162 is sleeved on the insulating layer 161; the adjusting nut 162 is in threaded fit with the fixed block 11; the ignition needle 16 is inserted into the injection tube 14; the tip of the ignition needle 16 extends to the nozzle of the burner 15.
After the fixed block 11 is grounded, the injection pipe 14 is grounded with the nozzle. The ignition needle 16 is connected to the high voltage electrode. The distance between the needle head of the ignition needle 16 and the nozzle is short, air is punctured through high voltage, and electric sparks are generated to ignite fuel gas. The distance between the ignition needle 16 and the nozzle is adjusted, so that the optimal ignition distance can be reached, and the ignition success rate is increased.
The diameter d and the length L1 of the gas nozzle satisfy the following calculation formula:
in the formula: v-gas jet velocity in m/s
T a Air temperature, K
T g Temperature of the gas, K
P g Absolute gas pressure, KPa
P a Absolute pressure of air, KPa
ΔP g -relative pressure before gas nozzle, KPa
ρ g Density of gas, kg/m 3
In the formula: d-diameter of gas nozzle, mm
q-design Natural gas flow, nm 3 H, take 0.2
K-nozzle correction factor, 0.75
L1＝2d
The diameter of the wider end of the contraction cavity satisfies the following calculation formula:
V 1 ＝αqV 0
in the formula: alpha-air excess coefficient, 1.05
V 0 —1Nm 3 The theoretical air requirement of natural gas is 9.575
V 1 Actual air intake, m 3
m v ＝V 1 /q
m m ＝(ρ a V 1 )/(ρ g g)+1
In the formula: m is v -volumetric injection ratio
m m Mass injection ratio
Φ＝mm mvδ
In the formula: phi-structural coefficient of mixing section
Delta-shape factor of ejector, 0.95
With the ignition device 1 provided in the present embodiment, the gas-to-air ratio can be maintained at a certain ratio (the ratio is determined by the air excess factor and the theoretical air demand of natural gas) regardless of the change in the gas flow rate. At this ratio, the ignition success rate is higher.
The threaded connection in this embodiment all adopts M metric system fine tooth screw, guarantees its reliable leakproofness, places gas or combustible gas mixture and leaks.
The gas nozzle 12 is made of red copper (meeting GB80028 Town gas design Specification), has the characteristic of high heat conductivity coefficient, and can quickly exchange heat with air, so that heat brought by the combustion chamber 21 is quickly reduced.
The fixed block 11 is made of LF21 antirust aluminum, has high conductivity, is connected with the injection pipe 14 through threads to serve as grounding, ensures that the high-voltage ignition transformer discharges more fully, and has good heat-conducting performance to meet the heat dissipation requirement.
Preferably, the burner 15 is a cutting nozzle. The purpose lets the small fire flame of burning powerful, when the wind that gets into through fan 24, maintains always burning, keeps not flame-out.
In a second aspect, the present embodiment provides a boiler comprising a combustion chamber 21, a burner 23 and a fan 24; the air outlet of the fan 24 is communicated with the combustor 23 through a square-top-bottom round elbow; an air inlet of the fan 24 is communicated with the venturi tube 241; the venturi tube 241 is in communication with a gas conduit 243 and an air inlet; an air filter element 242 is provided at the air inlet. The gas and air may be mixed in the venturi 241; and finally to the burner 23 by means of a fan 24.
The combustion chamber 21 includes a cylinder 22 and a first heat exchanging portion; the burner 23 is arranged on the top of the cylinder 22; the combustor 23 includes a combustion cylinder; the combustion cylinder includes a connection portion 231 and a combustion portion 232; the connecting portion 231 has a cylindrical shape; the combustion part 232 is in a cone shape with a large upper part and a small lower part; the lower end of the combustion part 232 is closed; the combustion part 232 is provided with combustion ports which are arranged along the generatrix of the conical cylinder-shaped combustion part 232; the burner port is rectangular. The lower end of the connecting part 231 is connected with the combustion part 232, and the upper end is connected with the square-top-and-bottom-round elbow. Preferably, the conical combustion part 232 has an included angle between a generatrix and an axis of 10 to 25 degrees. Preferably, the width of the combustion port is 1-3 mm, and the length of the combustion port is 2-6 mm. The combustor 23 is set to be in a cone shape, so that the heat exchange efficiency of the high-temperature flue gas and the first heat exchange part can be improved.
The ignition device 1 is connected with the top of the cylinder 22, and a burner 15 of the ignition device 1 is close to the combustion part 232; the distance between the burner 15 and the conical surface of the combustion part 232 is preferably 3 to 5 mm. The burner 23 is used to generate the large fire required by the boiler; the ignition device 1 is used to produce a small fire to ignite a large fire.
The boiler is used for generating steam.
Further, the embodiment also provides a method for igniting and maintaining the fire of the boiler. The method comprises the following steps:
A. after an ignition program is started, igniting a small fire, igniting a large fire, and entering a normal operation state;
B. the fan accelerates to speed V 1 ；
C. Closing the small fire, and normally operating;
D. when the fan decelerates to the speed V 2 Or the vapor pressure reaches P 1 Then is turned onA small fire; when the vapor pressure is reduced to P 3 If yes, executing step B; when the vapor pressure increases to P 2 If yes, executing step E;
E. closing the big fire, entering the small fire and keeping the standby state;
F. when the vapor pressure is reduced to P 3 If yes, executing step B; when the vapor pressure is reduced to P 3 Executing step G before receiving the stop signal;
G. and closing the small fire and entering a standby state.
The V is 1 、V 2 、V 2 May be wind speed or rotational speed; may be considered a setting.
The P is 1 、P 2 、P 3 Is the vapor pressure.
The method is realized by controlling a gas valve and an ignition device and monitoring vapor pressure through a PLC control system. The above implementation manner is a conventional technical solution in the art, and is not described herein again. Through the scheme, the ignition frequency is reduced, and the risk of detonation is reduced. The pressure and fan speed in the scheme can be set.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. An ignition device, characterized by: comprises an ignition section and a fuel section; the fuel section can be used for mixing fuel gas and air in proportion and then sending the mixture to the ignition section; the ignition section is used for generating spark to ignite the fuel gas.
2. An ignition device as defined in claim 1, wherein: comprises a fixed block (11); the fuel section comprises a gas nozzle (12) and an air suction port which are arranged on the fixed block (11), and a contraction cavity (113) which is arranged in the fixed block (11); the gas nozzle (12) comprises a gas nozzle (123), and the gas nozzle (123) is communicated with the contraction cavity (113); the air suction opening is communicated with the contraction cavity (113);
3. an ignition device as defined in claim 2, wherein: the ignition section comprises an injection pipe (14) arranged on the fixed block (11) and a burner (15) arranged on the injection pipe (14); the injection pipe (14) is communicated with the contraction cavity (113); the ignition device also comprises an ignition needle (16) arranged in the injection pipe (14); the ignition needle (16) is used for being matched with the burner (15) to generate sparks.
4. An ignition device as defined in claim 2, wherein: the diameter of the contraction cavity (113) gradually contracts along the gas injection direction.
5. An ignition device as defined in claim 3, wherein: the diameter d of the gas nozzle (123) satisfies the following calculation formula,
in the formula: d is the diameter of the gas nozzle; q is the design natural gas flow; k is a gas nozzle correction coefficient;
wherein
In the formula: v is the flow velocity of the fuel gas at the nozzle; t is a Is the air temperature; t is g Is the gas temperature; p g Is the absolute pressure of the fuel gas; p a Is the absolute pressure of air; delta P g The relative pressure in front of the gas nozzle; rho g Is the density of the fuel gas;
diameter D of the air suction opening 2 The following calculation formula is satisfied,
6. an ignition device as defined in claim 2, wherein: the gas nozzle (12) comprises an adjustment mechanism; the adjusting mechanism comprises an adjusting rod (122) and a displacement mechanism; the top end of the adjusting rod (122) is a conical surface; the top end of the adjusting rod (122) is matched with the gas nozzle (123); driven by the displacement mechanism, the adjusting rod (122) can be far away from or close to the gas nozzle (123).
7. An ignition device as defined in claim 5, wherein: the displacement mechanism comprises an adjustment screw (121); the adjusting rod (122) is connected with the adjusting screw (121); the adjusting screw (121) is in threaded fit with the gas nozzle (12).
8. An ignition device as defined in claim 2, wherein: an insulating layer (161) is arranged outside the ignition needle (16); the ignition device also comprises an ignition needle (16) adjusting mechanism; the ignition needle (16) adjusting mechanism comprises an adjusting nut (162); the adjusting nut (162) is sleeved on the insulating layer (161); the adjusting nut (162) is in threaded fit with the fixed block (11); the ignition needle (16) can be far away from or close to the burner (15) through the adjusting nut (162).
9. An ignition device as defined in claim 1, wherein: an air suction port is formed in the fixed block (11); the air suction opening communicates with the contraction chamber (113).
10. A boiler using an ignition device (1) according to any one of claims 1 to 9; the method is characterized in that: the boiler comprises a combustion chamber (21); a combustor (23) is arranged in the combustion chamber (21); the ignition device (1) is arranged outside the combustor (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210987298.4A CN115342377A (en) | 2022-08-17 | 2022-08-17 | Ignition device and boiler using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210987298.4A CN115342377A (en) | 2022-08-17 | 2022-08-17 | Ignition device and boiler using same |
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| CN115342377A true CN115342377A (en) | 2022-11-15 |
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| CN202210987298.4A Pending CN115342377A (en) | 2022-08-17 | 2022-08-17 | Ignition device and boiler using same |
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| CN212273987U (en) * | 2020-03-27 | 2021-01-01 | 李明雷 | Stepless speed change air-fuel double helix high speed low nitrogen oxide burner |
| CN113310047A (en) * | 2020-02-26 | 2021-08-27 | 北京势蓝科技有限公司 | Injection type gas ignition system |
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|---|---|---|---|---|
| CN86204051U (en) * | 1986-09-01 | 1987-07-29 | 上海市公用事业研究所 | Gas radiant-tube with promoted igniter |
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