WO2018218525A1

WO2018218525A1 - Ignition nozzle device capable of selecting ignition fuel

Info

Publication number: WO2018218525A1
Application number: PCT/CN2017/086662
Authority: WO
Inventors: 杨瑞; 曹晶; 左成艺
Original assignee: 深圳智慧能源技术有限公司
Priority date: 2017-05-31
Filing date: 2017-05-31
Publication date: 2018-12-06

Abstract

An ignition nozzle device capable of selecting an ignition fuel comprises a nozzle wall cylinder (12) and a nozzle tube (14). A combustion chamber (24) is formed in the nozzle wall cylinder (12). The nozzle wall cylinder (12) comprises a front end (20) and a rear end (22) opposite to each other in an axial direction. The nozzle tube (14) is mounted on the front end (20) of the nozzle wall cylinder (12) and is in communication with the combustion chamber (24). The nozzle tube (14) is used for igniting a device to be ignited. The nozzle wall cylinder (12) is provided with a gas nozzle (16) for injecting a gas into the combustion chamber (24). The rear end (22) of the nozzle wall cylinder (12) is provided with a fuel oil nozzle mounting position, and optionally, a fuel oil injector (18) or a seal cover can be mounted on the fuel oil nozzle mounting position. The ignition nozzle device has a simple structure, is convenient to mount, has high practicability and is suitable for popularization and application.

Description

Ignition nozzle device with optional ignition fuel

Technical field

[0001] The present invention relates to an ignition nozzle, and more particularly to an ignition nozzle device that can select an ignition fuel.

Background technique

[0002] Currently, ignition nozzles are classified into a gas ignition nozzle and a fuel ignition nozzle. Gas ignition nozzles can only be ignited with gas as fuel. Fuel ignition nozzles can only be ignited with fuel as fuel. This single-phase fuel ignition nozzle is suitable for single environment and lacks flexibility. Under some special conditions, the ignition demand cannot be met.

[0003] In some systems, fuel nozzles and gas nozzles are provided on the ignition nozzle in order to meet the requirements of fuel ignition and gas ignition, but in any fixed application scenario, only one nozzle is used, so It will cause a waste of costs.

technical problem

In view of the above, the present invention proposes an ignition nozzle device that can meet the demand for gas-liquid two-phase fuel ignition without increasing the cost.

Problem solution

Technical solution

[0005] The present invention provides an ignition nozzle device for selecting an ignition fuel, comprising a nozzle wall cylinder and a nozzle tube, wherein the nozzle wall cylinder forms a combustion chamber, and the nozzle wall cylinder includes axially opposite front ends and rear portions The nozzle tube is installed at a front end of the nozzle wall tube and communicates with the combustion chamber, the nozzle tube is used for igniting a device to be ignited, and the nozzle wall tube is provided with a fuel gas for injecting into the combustion chamber. The gas nozzle has a fuel nozzle mounting position at a rear end of the nozzle wall cylinder, and a fuel nozzle or a sealing cover is selectively mounted on the fuel nozzle mounting position.

[0006] In an embodiment, the nozzle wall tube includes a radially inner nozzle wall and a nozzle outer wall, the combustion chamber is formed in the inner wall of the nozzle, and the inner wall of the nozzle and the outer wall of the nozzle are formed and externally A communicating air flow passage is provided with a plurality of holes in the inner wall of the nozzle such that the air flow passage communicates with the combustion chamber. [0007] In an embodiment, the inner wall of the nozzle is provided with an end plate on a side of the front end of the nozzle wall tube, the nozzle tube is disposed on the end plate, and the nozzle tube includes an intake end and An ignition end, the intake end being in communication with the combustion chamber.

In one embodiment, the device to be ignited is a gas turbine, and the gas turbine includes a gas turbine combustion chamber, and an ignition end of the nozzle tube extends into the combustion chamber of the gas turbine to ignite it.

[0009] In an embodiment, the fuel nozzle includes a mounting portion, and when the fuel nozzle is mounted, the mounting portion abuts against an end of the outer wall of the nozzle and the inner wall of the nozzle, and the cover body is externally a connecting portion extending perpendicularly to a front end of the nozzle wall tube, wherein the connecting portion is detachably connected to the outer wall of the nozzle, and the cover body is away from a central position thereof toward a front end away from the front end of the nozzle wall tube The direction extends to a protrusion connected to the fuel pipe, and the protrusion and the cover are provided with perforations communicating with the combustion chamber.

[0010] In an embodiment, the connecting portion is screwed to the outer wall of the nozzle.

[0011] In an embodiment, the plurality of holes are evenly distributed along a circumferential direction of the inner wall of the nozzle, and the plurality of holes include a plurality of holes arranged in the axial direction.

[0012] In some embodiments, the device to be ignited is a combustion chamber of a gas turbine.

[0013] The present invention also provides an ignition nozzle device for selecting an ignition fuel, comprising a nozzle wall cylinder and a nozzle tube, the nozzle wall cylinder forming a combustion chamber, the nozzle wall cylinder including an axially opposite front end and a nozzle tube is installed at a front end of the nozzle wall tube and communicates with the combustion chamber, the nozzle tube is used for igniting a device to be ignited, and the nozzle wall tube is provided with a gas nozzle mounting position and a fuel nozzle installation Position, when one of the gas nozzle mounting position and the fuel nozzle mounting position is selected not to install a corresponding nozzle 吋, one of the gas nozzle mounting position and the fuel nozzle mounting position is sealed Cover it.

Advantageous effects of the invention

Beneficial effect

In summary, the present invention provides an ignition nozzle device that selectively uses fuel or gas ignition.

A gas nozzle is arranged on the nozzle wall cylinder to inject gas into the combustion chamber, a fuel nozzle is arranged at the rear end of the nozzle wall cylinder to inject fuel into the combustion chamber, and the worker can selectively use gas ignition or fuel ignition according to specific working conditions. If you have special needs, you can also use gas and fuel for two-phase fuel ignition. Moreover, when the fuel nozzle 不需要 is not required, it can be removed directly and replaced with another type. The type of cover, such as a solid sealing cover, satisfies the diverse needs of the ignition nozzle device without increasing the cost. The ignition nozzle device of the invention has the advantages of simple structure, convenient installation and strong practicability, and is suitable for popularization and application.

Brief description of the drawing

DRAWINGS

1 is an axial cross-sectional view of an ignition nozzle device of the present invention.

2 is a radial cross-sectional view of the ignition nozzle device of the present invention.

Embodiments of the invention

[0017] Before the embodiments are described in detail, it is understood that the invention is not limited to The invention may be embodied in other ways. Further, it should be understood that the phraseology and terminology used herein are for the purpose of description The words "including", "comprising", "having", and the like, are used in this context to include the items listed thereafter, their equivalents, and other additional items. In particular, when describing "a certain component", the present invention does not limit the number of the components to one, and may include a plurality.

As shown in FIGS. 1 and 2, the present invention provides an ignition nozzle device 10 including a nozzle wall cylinder 12, a nozzle tube 14, a gas nozzle 16, and a fuel nozzle 18. The nozzle wall cylinder 12 has an opposite front end 20 and a rear end 22 in the axial direction. The nozzle wall tube 12 defines a combustion chamber 24. The nozzle tube 14 is mounted on the front end 20 of the nozzle wall cylinder 12 and communicates with the combustion chamber 24 for A device to be ignited, for example, a gas turbine, an aeroengine, a boiler, a natural gas venting torch, etc., in this embodiment, a gas turbine is taken as an example. The gas nozzle 16 is disposed on the nozzle wall cylinder 12 for injecting fuel gas into the combustion chamber 24, and the fuel nozzle 18 is mounted at the rear end 22 of the nozzle wall cylinder 12 for injecting fuel into the combustion chamber 24.

[0019] The present invention is provided with the gas nozzle 16 and the fuel nozzle 18 at the same location on the ignition nozzle device 10, so that the ignition nozzle device 10 can selectively install the gas nozzle 16 to ignite or install the fuel nozzle 18 to ignite according to actual working conditions. Or, the gas nozzle 16 and the fuel nozzle 18 are used for ignition. When the gas nozzle 16 is installed, the mounting position of the fuel nozzle 18 can be closed by a sealing cover; when the fuel nozzle 18 is used for ignition, the mounting position of the gas nozzle 16 can be closed by a sealing cover; when using a gas-liquid two-phase fuel ignition, The gas nozzle 16 and the fuel nozzle 18 are installed at the same time, and the gas and fuel are supplied in a predetermined ratio to satisfy the ignition nozzle. The diverse needs of the device 10.

In another embodiment, if gas ignition is used in most cases, the gas nozzle 16 may be fixed to the nozzle wall barrel 12, and the fuel nozzle 18 may be replaceably mounted to the nozzle wall barrel 12. Thus, the fuel nozzle 18 is installed only when fuel ignition is required.

[0021] In the illustrated embodiment, the nozzle wall cylinder 12 includes a radially inner nozzle wall 26 and a nozzle outer wall 28

The cavity in the inner wall 26 of the nozzle forms a combustion chamber 24, and an air flow passage 30 communicating with the outside of the ignition nozzle device 10 is formed between the nozzle inner wall 26 and the nozzle outer wall 28.

[0022] The nozzle inner wall 26 is provided with a plurality of holes 32 through which the air flow passages 30 communicate with the combustion chamber 24. In the present embodiment, the plurality of holes 32 are evenly distributed along the circumferential direction of the inner wall 26 of the nozzle, and are arranged in the axial direction in a plurality of holes, for example, three turns.

[0023] The air flow path 30 includes a front end and a rear end, and the front end of the air flow path 30 is for the outside air to enter the air flow path 30, and the rear end of the air flow path 30 is closed so that the air entering the air flow path 30 passes through A plurality of apertures 32 enter the combustion chamber 24 to provide sufficient air for combustion of the gas and/or fuel.

The gas nozzle 16 is disposed on the outer peripheral wall of the nozzle wall cylinder 12, for example, the gas nozzle 16 is disposed through the nozzle outer wall 28 of the nozzle wall cylinder 12 and the nozzle inner wall 26. The gas nozzle 16 includes a gas inlet 34 that communicates with the combustion chamber 24 to provide fuel gas to the combustion chamber 24.

[0025] The gas nozzle 16 is adjacent to the rear end 22 of the nozzle wall cylinder 12, and the injection direction of the gas nozzle 16 is offset from the diameter direction of the nozzle wall cylinder 12, so that the gas injected from the gas nozzle 16 impinges on the nozzle inner wall 26, thereby along the combustion chamber 2. The rotating gas flow field is formed in the 4th direction, and the gas entering the combustion chamber 24 is moved in the axial direction toward the nozzle tube 14 as a whole, thereby promoting uniform mixing of the gas and the air.

In the illustrated embodiment, the gas inlet 34 is adjacent to the inner wall surface of the combustion chamber 24 so that the injected gas can be rotated along the inner wall of the combustion chamber 24. When the gas inlet 34 injects a gas enthalpy into the combustion chamber 24, the gas stream forms a rotating gas flow field around the axial direction of the nozzle wall cylinder 12 under the influence of the inner wall of the combustion chamber, and the air is uniformly mixed with the air entering from the plurality of holes 32. , shorten the mixing of gas and air to improve ignition efficiency.

[0027] The nozzle wall cylinder 12 is further provided with an igniter mounting position 35 for mounting an igniter (not shown) for igniting the fuel and air mixture entering the combustion chamber 24.

[0028] In the illustrated embodiment, the nozzle inner wall 26 is provided with an end plate 36 on one side of the front end 20 of the nozzle wall, the edge of the end plate 36 being sealingly connected to the inner wall 26 of the nozzle, and the central portion of the end plate 36 is provided for Through hole through which the nozzle tube 14 is bored So that the combustion chamber 24 communicates with the inside of the nozzle tube 14. The nozzle tube 14 includes an intake end 38 and an ignition end 40, wherein the intake end 38 is located within the combustion chamber 24 and the ignition end 40 is coupled to the gas turbine. Specifically, the gas turbine includes a gas turbine combustor, and the firing end 40 of the nozzle tube 14 extends into the gas turbine combustor to ignite it.

[0029] It should be understood that, in the above embodiment, the device to be ignited is implemented as a gas turbine for illustrative purposes only. In other embodiments, the device to be ignited may also be implemented as other devices, which is not limited by the present invention.

[0030] A fuel nozzle 18 is mounted at the rear end 22 of the nozzle wall cylinder 12 for injecting fuel into the combustion chamber 24. Specifically, the fuel nozzle 18 is provided with a mounting portion 42, and is attached to the rear end 22 of the nozzle wall cylinder 12 by the mounting portion 42. After installation, the mounting portion 42 seals the rear end 22 of the nozzle barrel wall 12. In the illustrated embodiment, the mounting portion 42 includes a cover 44 that abuts against the nozzle outer wall 28 and the nozzle inner wall 26 at the end of the nozzle wall barrel rear end 22 such that the combustion chamber 24 and the air flow passage 30 Sealed on one side of the nozzle wall barrel rear end 22. The cover body 44 extends perpendicularly from the outer edge thereof toward the front end 20 of the nozzle wall to a connecting portion 46. The connecting portion 46 is detachably coupled to the nozzle outer wall 28 to connect the mounting portion 42 to the rear end 22 of the nozzle wall barrel 12. . The cover 44 extends from a central position away from the front end 20 of the nozzle wall to a projection 48 for connection to the fuel pipe. The center of the projection 44 and the cover 44 is provided with a perforation communicating with the combustion chamber 24 to supply fuel into the combustion chamber 24.

[0031] It should be understood that the design of the fuel nozzle 18 and the mounting portion 42 thereof are merely exemplary. The present invention is not limited thereto. In other embodiments, the fuel nozzle 18 and the mounting portion 42 may also be designed. For other types.

[0032] The connecting portion 46 is detachably connected to the nozzle outer wall 28. In the illustrated embodiment, the connecting portion 46 is threadedly coupled to the outer nozzle wall 28. Specifically, the inner side of the connecting portion 46 is provided with a mating thread on the outer wall surface corresponding to the outer wall 28 of the nozzle, so that the mounting portion 42 can be screwed to the outer wall 28 of the nozzle by rotation, facilitating the mounting and dismounting of the ignition nozzle device 10. When the fuel nozzle 18吋 is not required, the fuel nozzle 18 can be directly removed, and the rear end 22 of the nozzle wall tube 12 can be directly sealed with other sealing caps, which is convenient and quick.

[0033] It should be noted that in other embodiments, the connecting portion 46 and the nozzle outer wall 28 may also be fixedly connected by other means, for example, a screw hole is provided at a corresponding position of the connecting portion 46 and the nozzle outer wall 28, and the screw is used. The two are connected.

In summary, the present invention provides an ignition nozzle device that selectively uses fuel or gas ignition. A gas nozzle is arranged on the nozzle wall cylinder to inject gas into the combustion chamber, a fuel nozzle is arranged at the rear end of the nozzle wall cylinder to inject fuel into the combustion chamber, and the worker can selectively use gas ignition or fuel ignition according to specific working conditions. If you have special needs, you can also use gas and fuel for two-phase fuel ignition. Moreover, when the fuel nozzle 不需要 is not required, it can be directly removed and replaced with other types of covers, such as a solid sealing cover, to meet the diverse needs of the ignition nozzle device without increasing the cost. The ignition nozzle device of the invention has the advantages of simple structure, convenient installation and strong practicability, and is suitable for popularization and application.

The concepts described herein may be embodied in other forms without departing from the spirit and scope. The specific embodiments disclosed are to be considered as illustrative and not restrictive. Therefore, the scope of the invention is to be determined by the appended claims rather Any changes which come within the meaning and range of the claims are intended to be within the scope of the claims.

Claims

Claim

An ignition nozzle device for selectively selecting an ignition fuel, comprising a nozzle wall cylinder and a nozzle tube, wherein the nozzle wall cylinder forms a combustion chamber, and the nozzle wall cylinder includes axially opposite front and rear ends, the nozzle tube Installed at a front end of the nozzle wall tube and communicated with the combustion chamber, the nozzle tube is used for igniting a device to be ignited, and the nozzle wall tube is provided with a gas nozzle for injecting fuel gas into the combustion chamber, the characteristic of which is The rear end of the nozzle wall cylinder is provided with a fuel nozzle mounting position, and a fuel nozzle or a sealing cover is selectively mounted on the fuel nozzle mounting position.

The ignition nozzle device for an alternative fuel according to claim 1, wherein said nozzle wall cylinder includes a radially inner nozzle wall and a nozzle outer wall, and said combustion chamber is formed in said nozzle inner wall. An air flow passage communicating with the outside is formed between the inner wall of the nozzle and the outer wall of the nozzle, and the inner wall of the nozzle is provided with a plurality of holes such that the air flow passage communicates with the combustion chamber.

The ignition nozzle device of claim 2, wherein the nozzle inner wall is provided with an end plate on a side of the front end of the nozzle wall cylinder, and the nozzle tube is disposed through the end plate. The nozzle tube includes an intake end and an ignition end, and the intake end is in communication with the combustion chamber.

The ignition nozzle device of claim 3, wherein the device to be ignited is a gas turbine, the gas turbine comprises a gas turbine combustor, and an ignition end of the nozzle tube extends into the combustion chamber of the gas turbine To ignite it.

The ignition nozzle device of claim 2, wherein the fuel nozzle includes a mounting portion that abuts against the outer wall of the nozzle and the inner wall of the nozzle when the fuel nozzle is mounted An end portion of the cover body extending perpendicularly from a front edge thereof toward a front end of the nozzle wall tube, wherein the connecting portion is detachably connected to the outer wall of the nozzle, and the cover body is The central position extends away from the front end of the nozzle wall tube with a projection connected to the fuel pipe, and the projection and the cover are provided with perforations communicating with the combustion chamber.

An ignition fuel-selectable ignition nozzle device according to claim 5, wherein The connecting portion is screwed to the outer wall of the nozzle.

[Claim 7] The ignition fuel-selectable ignition nozzle device according to claim 2, wherein the plurality of holes are evenly distributed along a circumferential direction of the inner wall of the nozzle, and the plurality of holes include axially arranged Multi-circle holes.

The ignition nozzle device for an alternative ignition fuel according to any one of claims 1 to 7, wherein the device to be ignited is a combustion chamber of a gas turbine.

[Answer 9] An ignition nozzle device of an alternative ignition fuel, comprising a nozzle wall barrel and a nozzle tube, the nozzle wall barrel forming a combustion chamber, the nozzle wall barrel including an axially opposite front end and a rear end The nozzle tube is installed at a front end of the nozzle wall tube and communicates with the combustion chamber, and the nozzle tube is used for igniting a device to be ignited, wherein the nozzle wall tube is provided with a gas nozzle mounting position and a fuel oil. a nozzle mounting position, when one of the gas nozzle mounting position and the fuel nozzle mounting position is selected not to mount a corresponding nozzle 吋, one of the gas nozzle mounting position and the fuel nozzle mounting position is Covered by a sealed cover.

[Claim 10] The ignition fuel-selectable ignition nozzle device according to claim 9, wherein the device to be ignited is a combustion chamber of a gas turbine.