CN217004456U

CN217004456U - Igniter nozzle device

Info

Publication number: CN217004456U
Application number: CN202123346696.8U
Authority: CN
Inventors: 孙亚军
Original assignee: Zheke Shanghai Combustion Equipment Co ltd
Current assignee: Zheke Shanghai Combustion Equipment Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-07-19
Anticipated expiration: 2032-05-10

Abstract

The application discloses some firearm nozzle assembly, it includes the windshield, sets up the shower nozzle of the radial inboard in the windshield near-end and sets up the direction nozzle in the axial distal end of windshield, the direction nozzle with prevent wind the housing and be connected as an organic whole, the direction nozzle has the water conservancy diversion passageway, the water conservancy diversion passageway forms the export at the tip, the export personally submits the angle setting with the transversal of direction nozzle portion; a plurality of side holes are formed in the first side surface area of the windproof cover; the pilot burner and the wind shield casing are positioned such that a projection of an extension of the outlet outside the wind shield casing is in the same direction as the first side area on the wind shield casing. Compare with traditional some firearm nozzle, the gas pressure that adopts the demand of some firearm of the nozzle device of this application is lower with air pressure, saves the equipment cost that the wind ratio needs to drop into the construction greatly, effectively improves flame intensity and rigidity, has better effect of preventing wind.

Description

Igniter nozzle device

Technical Field

The present application relates to ignition devices, particularly to fittings for boiler igniters.

Background

The igniter has the general working principle that air and fuel gas are sprayed out through a pipeline and then premixed, and are ignited through an electrode, flame is formed at the front end of a nozzle, and a corresponding combustion area is ignited.

However, in the field of the existing combustion equipment, in the combustion process caused by the differentiation and the transformation of the hearth, the internal pressure of the hearth fluctuates up and down, is unstable, generates back pressure and uncertainty of the heating degree of an internal structure, the gas pressure and the air pressure of an igniter face certain challenges, and in order to stabilize the air pressure, a more powerful air compressor or even an air blower needs to be selected on the construction cost, so that the premixed air-fuel ratio effect of the designed outlet of the igniter can be achieved, otherwise, after the combustion load is increased by more than 50%, the flame of the igniter is too short due to the overlarge hearth back pressure caused by the positive pressure in most hearths, a high-load area cannot be ignited, and the flame is identified by a detection flame analyzer caused by the flame gas field deflagration phenomenon, the igniter flame breathing phenomenon, the amplitude phenomenon of the hearth vibration frequency and even extinguishment, and finally, the MFT alarm emergency stop phenomenon of the whole boiler system.

The utility model has the following contents:

it is an object of the present invention to provide a nozzle arrangement for an igniter that provides consistent success of ignition and/or provides consistent flame after ignition under the aforementioned conditions that are not conducive to successful ignition.

To this end, some embodiments of the present application provide an igniter nozzle assembly including a windshield, a burner head disposed radially inward of a proximal end of the windshield, and a pilot burner disposed axially distal of the windshield, the pilot burner being integrally connected to the windshield, the pilot burner having a flow-directing channel forming an outlet at an end thereof, the outlet being disposed at an angle to a cross-section of the pilot burner head; a plurality of side holes are formed in the first side surface area of the windproof cover; the pilot burner and the wind break casing are positioned such that a projection of an extension of the outlet outside the wind break casing is in the same direction as the first side area on the wind break casing.

In some embodiments, a step is formed by attaching a nozzle backing plate to the outer edge of the showerhead, one side of the step is attached to the windshield and the other side of the step is attached to the igniter outer sleeve to form an igniter cavity.

In some embodiments, a second side region of said windbreak casing opposite said first side region is a continuous surface.

In some embodiments, a longitudinal centre line of a projection of the extension of the outlet outside the wind break casing falls within the first side region, more preferably the longitudinal centre line of a projection of the extension of the outlet outside the wind break casing coincides with the longitudinal centre line of the first side region.

In some embodiments, the showerhead is positioned such that the ignition electrode passes through the showerhead passages to the distal side while the showerhead passages receive mixed gas provided from the gas supply passage of the igniter.

In some embodiments, the burner is positioned in communication with the pilot passage of the igniter such that a fireball formed upon a single ignition passes from the pilot passage into the burner passage while the burner passage receives the mixed gas provided from the gas supply passage of the igniter.

In some embodiments, the spray head has at least one set of outer ring orifices disposed on a radially larger portion and at least one set of center orifices disposed on a radially smaller portion.

In some embodiments, the at least one set of outer ring orifices and/or the at least one set of center orifices are disposed at an angle to a longitudinal axis of the showerhead such that a plurality of orifices of the at least one set of outer ring orifices and/or the at least one set of center orifices are directed toward the first side region.

In some embodiments, the at least one set of outer ring orifices and/or the at least one set of center orifices are disposed at an angle to a longitudinal axis of the showerhead such that a plurality of orifices of the at least one set of outer ring orifices and/or the at least one set of center orifices are aligned with the plurality of side apertures of the first side region, respectively.

In some embodiments, the at least one outer ring of nozzle holes and/or the at least one central group of nozzle holes are disposed at an angle to a longitudinal axis of the showerhead such that a plurality of nozzle holes of the at least one outer ring of nozzle holes and/or the at least one central group of nozzle holes are aligned with the second side region of the windbreak casing, respectively.

Compare with traditional some firearm nozzle, the gas pressure that adopts the demand of some firearm of the nozzle device of this application is lower with air pressure, saves the equipment cost that the wind ratio needs to drop into the construction greatly, effectively improves flame intensity and rigidity, has better prevent wind and prevent the backpressure effect, has considered the variety that the electrode struck sparks, adapts to various burning operating mode and combustion apparatus. And finally, stable combustion of combustion equipment is assisted, and the effects of energy conservation, emission reduction, low carbon and environmental protection are achieved.

Drawings

FIG. 1 is a perspective view of an igniter nozzle assembly according to an embodiment of the disclosure.

FIG. 2A is a schematic side view of an igniter nozzle assembly according to an embodiment of the disclosure.

Fig. 2B is a schematic cross-sectional view of the structure of the portion of the igniter nozzle assembly where the side hole is located according to an embodiment of the present application.

Fig. 2C is a partial schematic view of a portion of an igniter nozzle device with side holes according to an embodiment of the disclosure.

Fig. 3 is a schematic cross-sectional view of an igniter nozzle assembly, i.e., a cross-sectional view taken along plane B-B in fig. 2A, in accordance with an embodiment of the present application.

Fig. 4A is a cross-sectional view of a spray head of an igniter nozzle device according to an embodiment of the disclosure.

Fig. 4B is an end view of a spray head of an igniter nozzle device according to an embodiment of the disclosure.

Detailed Description

As shown in fig. 1, 2A, 2B, and 3, an igniter nozzle device 100 according to an embodiment of the present application includes a windshield 2, a shower head 3 disposed radially inward of a proximal end of the windshield, and a pilot burner 1 disposed at an axially distal end of the windshield 2.

The guide burner 1 is provided with a flow guide curve, one end of the flow guide curve is connected with the windshield 2, and the other end of the flow guide curve forms an outlet 11. The flow directing curve is configured to be disposed at an angle to the cross-section of the nozzle arrangement 100, such as about 30 degrees as shown in fig. 3.

A first lateral area S of the wind-break casing 2, for example the area indicated by the dashed line in fig. 2C, is provided with a plurality of lateral holes 21, while the area outside this first lateral area, in particular the side of the wind-break casing 2 opposite said first lateral area, is a continuous surface, i.e. is not provided with openings or openings of any kind.

Wherein the pilot burner 1 and the windbreak casing 2 are welded together, and in order to obtain the optimal windbreak effect, the pilot burner 1 and the windbreak casing 2 are positioned so that the direction of the outlet 11 of the pilot burner 1 determining the gas flow direction is in the same direction as the plurality of side holes 21 on the windbreak casing 2. The arrangement can reduce the collision probability caused by the unit section through which the combustible gas passes, so that the combustible gas is mixed with the external combustion air, the number of free radical molecules capable of reacting is increased, and the combustion flame is stabilized. For example, a projected longitudinal centerline L1 of an extension of the outlet 11 outside the windbreak casing 2, i.e., an imaginary portion of the windbreak casing 2 extending outward in the direction of the burner tip 1, falls within the first side region S of the plurality of side holes 21, and preferably, a projected longitudinal centerline L1 of the extension of the outlet 11 outside the windbreak casing 2 coincides with the longitudinal centerline L2 of the first side region of the plurality of side holes 21.

The nozzle 3 comprises a nozzle connecting section 31 which is a hollow cylinder, and a nozzle boss section 32 which is formed by extending from the first nozzle section 31 to one side and reducing radially, wherein the inner side of the nozzle boss section 32 is provided with a boss section passage 321 for allowing combustible gas to pass through, and the passage 321 is communicated with the connecting section passage 311 in the nozzle connecting section 31 so that the proximal end side 33 of the nozzle 3 is communicated with the distal end side 34 thereof to form a nozzle passage 35. A nozzle backing plate 4 may be fixedly attached to the outer edge of the nozzle connecting section 31, for example, the nozzle 3 and the nozzle backing plate 4 are welded to form a step 41, one side of the step 41, the left side in fig. 3, is butt-welded to the windshield 2, and the other side of the step 41, the right side in fig. 3, is butt-welded to the igniter outer sleeve 5 to form a closed igniter cavity.

In the embodiment shown in fig. 3, the showerhead 3 may be positioned such that the ignition electrode 3 passes from the showerhead passage 35 to the distal end side 34, while the showerhead passage 35 receives mixed gas M1 supplied from the gas supply passage of the igniter, thereby achieving precise ignition at the electrode tip 71 of the ignition electrode 7. For example, as shown in fig. 3, the electrode tip 71 of the ignition electrode 7 may be disposed flush with the distal end face 341 of the showerhead 3, thereby achieving ignition in a precise position.

Or in other embodiments, the nozzle tip 3 may be positioned to communicate with the pilot passage of the igniter so that a fireball formed by a single ignition enters the nozzle tip passage 35 from the pilot passage, and at the same time, the nozzle tip passage 35 receives the mixed gas M1 supplied from the gas supply passage of the igniter so as to be ignited in the nozzle tip passage 35.

As shown in fig. 4A and 4B, the injector 3 has an outer ring nozzle hole 322 provided in a radially larger portion and a center nozzle hole group 323 provided in a radially smaller portion, and the gas can be injected through the outer ring nozzle hole 322 and the center nozzle hole group 323 of the injector 3. The peripheral injection holes 322 may be disposed in multiple layers radially outward from the central injection hole group 323, for example, as shown, a first group of peripheral injection holes 322A and a second group of peripheral injection holes 322B are included. Wherein the first set of peripheral injection holes 322A may be uniformly or non-uniformly disposed on a first outer periphery of the boss section 32 and communicated to the injector passage 35, such as the boss section passage 321, and similarly, the second peripheral injection holes 322B may be uniformly or non-uniformly disposed on a second outer periphery of the boss section 32 and communicated to the injector passage 35, such as the boss section passage 321. Wherein the first and second outer peripheries are at different longitudinal and/or radial positions of the boss section.

The central set of spray holes 323 may be uniformly or non-uniformly arranged on the boss section 32 and connected to the spray head passage 35, such as the boss section passage 321 or the connecting section passage 311.

As shown in fig. 4A and 4B, in which only one outer ring nozzle hole 322 and/or one central nozzle hole 323 is exemplarily shown, the outer ring nozzle hole 322 and/or the central nozzle hole 323 may be disposed at an angle with respect to the longitudinal axis L3 of the nozzle tip 3, for example, at a plurality of angles within 45 ° from the longitudinal axis L3, such arrangement may more effectively improve the rigidity of the ignited gas flow, provide flame support in the thermal field reaction region of combustion, thus form a flame with a certain opening angle, or may serve a wind-proof function. These features and/or functions will be described in detail below.

The structure of the nozzle 3 can be adapted to different igniter designs, wherein in some igniter designs, ignition is performed once at a position far away from the nozzle 3, the mixed gas reaching the nozzle 3 is ignited to form flame, and then the nozzle channel 35 of the nozzle 3 can spray straight central flame along the longitudinal direction of the nozzle 3; in other igniter designs, however, the mixture gas introduced into the nozzle tip 3 has not been ignited, and the nozzle tip channel 35 of the nozzle tip 3 can be plugged into the electrode tip of the electrode to provide precise ignition.

One of the requirements for combustion is to reach a certain temperature, i.e. the ignition point. Below the ignition point, combustion is stopped. According to this principle, the spread of the flame can be prevented as long as the temperature of the burning substance is lowered below its ignition point. On the contrary, the heat transfer effect of the combustion area is increased, so that the heat transfer can be enhanced, the process of energy release is activated, and the fundamental basis for stabilizing the flame is provided.

When the air and the fuel gas are simultaneously or the mixed gas of the air and the fuel gas is ejected from the inner part of the pipeline of the outer sleeve 5 of the igniter and is ignited, the air and the fuel gas are throttled through the nozzle opening of the spray head 3. For example, in the embodiment with both the central nozzle hole and the first and second peripheral nozzle holes, a blue central flame and an outer ring flame with a certain flare angle can be released to form a lotus-shaped blue short flame; the first group of peripheral injection holes and/or the second group of peripheral injection holes 322B and the longitudinal axis L3 may form a certain angle so that the direction of the injection flow formed by the flame of the first group of peripheral injection holes 322A and/or the second group of peripheral injection holes 322B will flush the inner wall of the windproof housing 2, so that the combustion area is rapidly heated up, a thermal flow field is generated, the temperature condition required for combustion is reached, the heat value decomposition process of the fuel is activated, and the thermal state diffusion of the flame is stabilized. Meanwhile, the central flame formed by the nozzle channel 35 and/or the central nozzle group 323 is linearly jetted along the inner wall 22 of the windproof housing 2 without the opening under the clamping of the outer ring flame part of the peripheral nozzle hole until reaching the flow guiding curve of the guiding nozzle 1 to form jet type flame, and the jet flow track is changed according to the direction of the curve, so that a corresponding area is burnt.

The combustion and explosion are not direct intermolecular reaction, but are excited by external energy, molecular bonds are destroyed to generate activated molecules, the activated molecules are split into short-lived but very active free radicals, the free radicals collide with other molecules to generate new products, and meanwhile, new free radicals are generated to continue to react with other molecules. The greater the collision probability per unit cross section when the combustible gas is combusted, the less free radicals take part in the reaction.

The purpose of forming a large number of side holes 21 on one side of the windshield 2 is to form surface combustion of the windshield 2, and the high temperature of the surface combustion promotes accelerated expansion of air in the area between the spray head 3 and the windshield 2, thereby generating a thermal positive pressure and counteracting reverse wind pressure and back pressure. A stable burning rigid flame is formed. Specifically, when the burner 1 encounters a reverse wind pressure resistance, the flame of the jet flow type swings, after the fuel units of the same unit cross section are scattered by wind pressure, redundant fuel units can permeate and diffuse out of holes of the windproof housing 2, a large number of side holes are formed in one side of the windproof housing 2, the collision probability caused by the unit cross section through which combustible gas passes can be reduced, the combustible gas is mixed with external combustion-supporting wind, the number of free radical molecules which can participate in reaction is increased, surface combustion of the windproof housing 2 is formed, the high temperature of the surface combustion promotes the air in the areas of the nozzle 3 and the windproof housing 2 to expand in an accelerated manner, and a thermal positive pressure is generated to offset the reverse wind pressure and the back pressure. A stable burning rigid flame is formed.

The igniter nozzle device in the application can be matched with an ignition base of any ignition mode, not only can the flame intensity be stabilized, but also the wind resistance is outstanding, in order to verify the reliability of the igniter nozzle device, a hurricane storm test is carried out on the igniter nozzle device, the wind speed during the test reaches 267 kilometers per hour, the rainfall intensity reaches 1.32 meters per hour, and the incandescent lamp still keeps working and does not lose efficacy. The streaming phenomenon of flame is eliminated, the full combustion is realized, and the device is suitable for various combustion working conditions and combustion equipment.

Claims

1. An igniter nozzle assembly, comprising: the device comprises a windshield, a spray head arranged on the radial inner side of the near end of the windshield and a guide burner arranged on the axial far end of the windshield, wherein the guide burner is connected with the windshield into a whole and is provided with a flow guide channel, an outlet is formed in the end part of the flow guide channel, and the outlet and the cross section of the guide burner are arranged at an angle; a plurality of side holes are formed in the first side surface area of the windproof cover; the pilot burner and the wind break casing are positioned such that a projection of an extension of the outlet outside the wind break casing is in the same direction as the first side area on the wind break casing.

2. The igniter nozzle device of claim 1, wherein: the outer edge of the spray head is fixedly connected with a nozzle backing plate to form a step part, one side of the step part is fixedly connected with a windproof cover shell, and the other side of the step part is fixedly connected with an igniter outer sleeve to form an igniter cavity.

3. The igniter nozzle device of claim 1, wherein: a second side area of the wind shield directly opposite the first side area is a continuous surface.

4. The igniter nozzle device of claim 1, wherein: a longitudinal centerline of a projection of an extension of the outlet outside the wind shield casing falls within the first lateral area.

5. The igniter nozzle device of claim 4, wherein: the longitudinal center line of the projection of the extending part of the outlet outside the wind shield casing is coincident with the longitudinal center line of the first side surface area.

6. The igniter nozzle device of claim 1, wherein: the showerhead is positioned such that the ignition electrode passes through the showerhead passage to the distal side while the showerhead passage receives the mixed gas provided from the gas supply passage of the igniter.

7. The igniter nozzle device of claim 1, wherein: the burner is positioned to communicate with the pilot passage of the igniter such that a fireball formed by one ignition enters the burner passage from the pilot passage, and at the same time, the burner passage receives the mixed gas supplied from the gas supply passage of the igniter.

8. An igniter nozzle arrangement as defined in claim 6 or 7 wherein: the spray head is provided with at least one group of outer ring spray holes arranged on a part with a larger radial dimension and at least one group of central spray holes arranged on a part with a smaller radial dimension.

9. The igniter nozzle device of claim 8, wherein: the at least one group of outer ring jet holes and/or the at least one group of central jet holes are arranged at an angle to the longitudinal axis of the spray head, so that a plurality of jet holes in the at least one group of outer ring jet holes and/or the at least one group of central jet holes face the first side surface area.

10. The igniter nozzle device of claim 9, wherein: the at least one group of outer ring spray holes and/or the at least one group of central spray holes are arranged at a certain angle with the longitudinal axis of the spray head, so that a plurality of spray holes in the at least one group of outer ring spray holes and/or the at least one group of central spray holes are respectively aligned with the plurality of side holes of the first side surface area.

11. The igniter nozzle device of claim 10, wherein: the at least one group of outer ring spray holes and/or the at least one group of central spray holes are arranged at a certain angle with the longitudinal axis of the spray head, so that a plurality of spray holes in the at least one group of outer ring spray holes and/or the at least one group of central spray holes are respectively aligned with the second side surface area on the windproof housing.