KR102382600B1 - Combined swirl combustor - Google Patents

Abstract

The present invention relates to a combined swirl combustor comprising: a primary supply pipe in which primary air and primary fuel are mixed and supplied; a secondary supply pipe which is positioned to surround the primary supply pipe, of which the leading end extends from the leading end of the primary supply pipe, and in which secondary air and secondary fuel are mixed and supplied; a first perforated plate positioned at the leading end of the primary supply pipe and having a plurality of first through-holes formed thereon; and a second perforated plate positioned to obliquely surround the side of the first perforated plate on the inner circumferential surface of the leading end of the secondary supply pipe and having second through-holes opened in the tangential direction of the first perforated plate. The combined swirl combustor of the present invention provides optimized swirling of flame by adjusting the fuel and fluid supplied for combustion to have momentum in a tangential direction to an axial direction.

Description

Combined swirl combustor

The present invention relates to a combined vortex combustor that reduces nitrogen oxides generated during combustion and improves flame stability.

In combustors using conventional fossil fuels, the generation of nitrogen oxides (NOx) is inevitable due to a chemical reaction during combustion.

In this way, nitrogen oxides generated in the combustion process react with other substances in the atmosphere, causing environmental problems such as smog and ozone increase in the atmosphere. are strengthening

Low nitrogen oxide combustion technology to suppress the generation of nitrogen oxides is being developed through improvement of the structure of the combustor, such as improving the fuel-air mixture and air-fuel ratio.

Nitrogen oxides may be classified into thermal NOx, prompt NOx, and fuel NOx depending on the cause. Rapid nitrogen oxides are produced at a low temperature and lean air condition at the beginning of combustion of hydrocarbon-based fuels, and fuel nitrogen oxides are produced by the reaction of nitrogen components contained in fuel.

In addition, thermal nitrogen oxide is produced by reacting nitrogen in the air with oxygen at a high temperature, and the formation rate is very sensitive to temperature, and the formation rate rapidly increases as the temperature increases.

The most important element to reduce thermal nitrogen oxide is the flame structure, and the flame structure can be formed through various methods. Among these methods, a technique for forming a flame structure that reduces nitrogen oxide generation is used by resolving a local high-temperature region in the flame by controlling the swirling force of the fluid supplied to the combustor as a widely used method.

Patent Document 1 discloses a combustion device that controls a flame by driving a slewing vane in real time using a hydraulic cylinder in real time, and Patent Document 2 discloses a combustion device that drives a slewing blade equipped with a variable fuel nozzle to flow fuel and air is initiated

In the prior art as described above, it is possible to reduce thermal nitrogen oxide by precisely controlling the formation of a swirling flame to eliminate a high-temperature region of the flame, but for this purpose, since a driving unit such as a hydraulic cylinder is provided, the structure is complicated, and, in reality, There are many difficulties in commercializing it and applying it to an actual combustion system.

In addition, as the structure of the combustion device is complicated, there is a problem in that operation reliability and durability are deteriorated.

KR 10-2007-0103225 A KR 10-0820233 B1

An object of the present invention is to provide a combustor that optimizes the turning force of the flame by controlling the fuel and fluid supplied for combustion to have momentum in the axial and tangential directions, and has a simple structure and is easy to manufacture and operate.

In order to achieve the above object, the present invention provides a primary supply pipe in which primary air and primary fuel are mixed; a secondary supply pipe positioned to surround the primary supply pipe, the tip of which extends from the tip of the primary supply pipe, and through which secondary air and secondary fuel are mixed and supplied; a first perforated plate positioned at the tip of the primary supply pipe and having a plurality of first through holes formed therein; and a second perforated plate positioned to obliquely surround the side of the first perforated plate on the inner circumferential surface of the distal end of the secondary supply pipe, the second perforated plate having an open second through hole along the tangential direction of the first perforated plate; provides a combustor comprising a .

It is preferable to further include; a third perforated plate positioned to surround the periphery of the second perforated plate at the tip of the secondary supply pipe, and having a plurality of third through-holes formed therein.

a primary fuel supply pipe to which primary fuel is supplied, and a primary supply pipe surrounding the primary fuel supply pipe and having a primary air supply pipe to which primary air is supplied; a secondary supply pipe positioned to surround the primary air supply pipe, the ends of which extend from the ends of the primary fuel fuel supply pipe and the primary air supply pipe, and through which secondary air and secondary fuel are mixed and supplied; a first perforated plate positioned to surround the circumference of the primary fuel supply pipe at the front end of the primary air supply pipe and having a plurality of first through holes formed therein; and a second perforated plate positioned so as to obliquely surround the side of the first perforated plate on the inner circumferential surface of the tip side of the secondary supply pipe, and having a second through hole opened along the tangential direction of the first perforated plate; provides a combustor comprising a .

It is preferable that primary air and a fuel having a different property from the fuel supplied to the primary fuel supply pipe are supplied to the primary air supply pipe.

a primary supply pipe in which primary air and primary fuel are mixed; a secondary supply pipe positioned to surround the primary supply pipe, the tip of which extends from the tip of the primary supply pipe, and through which secondary air and secondary fuel are mixed and supplied; a slewing machine having a plurality of blades inclinedly disposed with slits at predetermined intervals along the circumferential direction of the tip of the primary supply pipe; and a perforated plate positioned to obliquely surround the swirler on the inner circumferential surface of the tip side of the secondary supply pipe, and having an open through hole formed along the tangential direction of the swirler and the direction of the slit. .

a primary supply pipe in which primary air and primary fuel are mixed; a secondary supply pipe positioned to surround the primary supply pipe, the tip of which extends from the tip of the primary supply pipe, and through which secondary air and secondary fuel are mixed and supplied; a slewing machine having a plurality of blades inclined with slits at predetermined intervals along the circumferential direction of the front end of the primary supply pipe; and a perforated plate positioned to obliquely surround the swirler on the inner circumferential surface of the front end of the secondary supply pipe and having a through hole open in the radial direction of the swirler.

It is preferable that a predetermined orbiting flame space is formed between the tip of the primary supply pipe and the inner peripheral surface of the tip of the secondary supply pipe.

It is preferable to further include a damper 101 for controlling the amount of each of the fuel and air to be supplied.

According to the combined vortex combustor according to the present invention, the structure is improved to divide and supply fuel and air so as to have momentum in the axial and tangential directions of the combustor, and by optimizing the flame structure by controlling the flow rate of fuel and air, the inside of the combustion furnace By improving the stability of the flame formed in the flame and eliminating the local high-temperature region in the flame, it is possible to induce low-emission combustion by minimizing the generation of thermal nitrogen oxides.

In addition, since the structure is simple, practical application is possible, and it is possible to improve the easiness of manufacture and reduce the manufacturing cost, as well as improve the durability and lifespan of the combustor.

1 schematically shows a combined swirl combustor according to a first embodiment of the present invention.
2 is a perspective view of a combined swirl combustor according to a first embodiment of the present invention.
3 is a plan view of a combined vortex combustor according to a first embodiment of the present invention.
4 schematically shows the combustion process of the combined swirl combustor according to the first embodiment of the present invention.
5 schematically shows a combined swirl combustor according to a second embodiment of the present invention.
6 is a perspective view of a combined swirl combustor according to a second embodiment of the present invention.
7 is a plan view of a combined vortex combustor according to a second embodiment of the present invention.
8 schematically shows the combustion process of the combined swirl combustor according to the second embodiment of the present invention.
9 schematically shows a combined swirl combustor according to a third embodiment of the present invention.
10 is a perspective view of a combined swirl combustor according to a third embodiment of the present invention.
11 is a plan view of a combined vortex combustor according to a third embodiment of the present invention.
12 schematically shows the combustion process of the combined swirl combustor according to the third embodiment of the present invention.
13 schematically shows a combined swirl combustor according to a fourth embodiment of the present invention.
14 is a perspective view of a combined vortex combustor according to a fourth embodiment of the present invention.
15 is a plan view of a combined vortex combustor according to a fourth embodiment of the present invention.
16 schematically shows the combustion process of the combined swirl combustor according to the fourth embodiment of the present invention.
17 schematically shows a combined swirl combustor according to a fifth embodiment of the present invention.
18 is a perspective view of a combined swirl combustor according to a fifth embodiment of the present invention.
19 is a plan view of a combined vortex combustor according to a fifth embodiment of the present invention.
20 schematically shows the combustion process of the combined swirl combustor according to the fifth embodiment of the present invention.

The above objects, features and other advantages of the present invention will become more apparent by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator. Therefore, definitions of these terms should be described based on the content throughout this specification.

In addition, the described embodiments are provided by way of example for the description of the invention, and do not limit the technical scope of the present invention.

Hereinafter, the combined swirl combustor 100 according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the description of each embodiment of the combined vortex combustor 100 according to the present invention, the same reference numerals are used to refer to the same components in each embodiment, and the description may be omitted or simplified.

The combined vortex combustor 100 according to the present invention is installed in a combustion furnace 10 having a predetermined combustion space therein.

As shown in FIG. 1 , the front end of the combined vortex combustor 100 is installed and inserted into one side of the combustion furnace 10 .

Hereinafter, in the description of each embodiment, the inner side of the combustion furnace 10 is referred to as a front end side, and the opposite side is referred to as a rear end side in a state in which the composite swirl combustor 100 is installed in the combustion furnace 10 .

<First embodiment>

First, the configuration of the combined swirl combustor 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4 .

As shown in FIGS. 1 to 3 , the combined orbiting combustor 100 according to the first embodiment of the present invention includes a primary supply pipe 110 , a secondary supply pipe 120 , a first perforated plate 130 , and a second It includes a perforated plate 140 .

The primary supply pipe 110 is located in the center of the combustor. The primary supply pipe 110 is configured in the form of a hollow tube, and a mixer in which primary air and primary fuel are mixed (hereinafter, may be referred to as a 'primary mixer') is provided from the rear end side of the primary supply pipe 110 . is supplied

The primary fuel is not limited, but may preferably be a liquid or gaseous fuel.

The primary mixer supplied to the rear end of the primary supply pipe 110 is introduced into the combustion furnace 10 through the front end of the primary supply pipe 110 .

Primary air and primary fuel supplied to the combustion furnace 10 through the primary supply pipe 110 are mixed in advance and supplied to the primary supply pipe 110, or mixed while passing through the primary supply pipe 110, and this Likewise, a primary mixer in which primary air and primary fuel are mixed is introduced into the combustion furnace 10 .

The secondary supply pipe 120 is positioned to wrap around the primary supply pipe 110 .

Specifically, the secondary supply pipe 120 is configured in the form of a hollow tube having a larger diameter than the primary supply pipe 110, and the primary supply pipe 110 is located inside the secondary supply pipe 120, and the primary supply pipe ( 110) and the secondary supply pipe 120 are positioned in the form of concentric circles.

1 to 3 , the tip of the secondary supply pipe 120 is extended to the inside of the combustion furnace 10 rather than the primary supply pipe 110 , and its inner peripheral surface is configured in an open state.

Secondary air and secondary fuel are supplied from the rear end side of the secondary supply pipe 120 .

The secondary fuel is not limited, but may preferably be a liquid or gaseous fuel like the primary fuel.

The secondary air and secondary fuel supplied to the rear end of the secondary supply pipe 120 are introduced into the combustion furnace 10 through the inner surface of the front end of the secondary supply pipe 120 .

The secondary air and secondary fuel supplied to the combustion furnace 10 through the secondary supply pipe 120 are also mixed in advance and supplied to the secondary supply pipe 120, like the primary fuel and primary air, or the secondary supply pipe. The mixture passes through 120 , and a mixer (hereinafter, may be referred to as a 'secondary mixer') in which secondary air and secondary fuel are mixed in this way is introduced into the combustion furnace 10 .

The first perforated plate 130 is located at the tip of the primary supply pipe 110 . The first perforated plate 130 is in the form of a plate, and a plurality of first through holes 131 are positioned therein.

The first through hole 131 is formed in the axial direction through which the primary mixer is supplied from the primary supply pipe 110 , and the primary mixer supplied to the primary supply pipe 110 passes through the first through hole 131 in the axial direction of the combustor. It is supplied into the combustion furnace 10 in a straight line and is combusted.

The second perforated plate 140 is located on the inner peripheral surface of the front end of the secondary supply pipe (120). Specifically, it is located in the opened portion of the inner peripheral surface of the secondary supply pipe 120 described above.

A plurality of second through-holes 141 are located in the second perforated plate 140 . The second through hole 141 is formed on the second perforated plate 140 to surround the upper portion of the tip side of the first perforated plate 130 .

Specifically, as shown in FIGS. 1 and 2 , the second through hole 141 is formed in the form of a hole opened in the tangential direction in contact with the periphery of the first perforated plate 130 on the second perforated plate 140 .

More easily, it may be formed in a shape substantially similar to a so-called chasing knife.

Accordingly, the secondary mixer of the secondary supply pipe 120 is supplied to the combustion furnace 10 while passing through the second through hole 141 of the second perforated plate 140 . That is, the secondary mixer is supplied into the combustion furnace 10 while swirling and flowing in a tangential direction around the first perforated plate 130 and combustion is made.

Next, a combustion process of the combined orbiting combustor 100 according to the first embodiment of the present invention will be described with further reference to FIG. 4 .

4, between the first perforated plate 130 located at the tip of the primary supply pipe 110 and the second perforated plate 140 located at the tip of the secondary supply pipe 120, the swirling flame that forms an approximately cup shape A space S is formed.

The primary mixer supplied into the combustion furnace 10 through the primary supply pipe 110 flows through the first through hole 131 of the first perforated plate 130 , that is, the perforation direction of the first through hole 131 . As it is supplied with momentum in the axial direction, the primary flame is formed in the orbiting flame space (S).

On the other hand, the secondary mixer supplied into the combustion furnace 10 through the secondary supply pipe 120 is a perforation of the second through hole 141 formed in the second perforated plate 140 located on the inner peripheral surface of the tip end of the secondary supply pipe 120 . It is supplied with momentum in the tangential direction at the upper portion of the circumference of the first perforated plate 130 along the direction.

That is, the secondary mixer forms a secondary flame while being supplied in the circumferential direction of the swirling flame space S formed between the inner peripheral surface of the first perforated plate 130 and the second perforated plate 140 through the second through hole 141 .

Thereby, a flame retardant structure is formed using the tangential momentum of the secondary supply pipe 120, and thermal nitrogen oxide generation is suppressed by additionally forming a flame of axial momentum through the primary supply part to resolve hot spots due to excessive recirculation. .

<Second embodiment>

Next, with reference to Figs. 5 to 8, the combined swirl combustor 100 according to the second embodiment of the present invention will be described in detail.

As shown in FIGS. 5 to 7 , the combined orbiting combustor 100 according to the second embodiment of the present invention includes a primary supply pipe 110 , a secondary supply pipe 120 , a first perforated plate 130 , and a second It includes a perforated plate 140 and a third perforated plate 150 .

The primary supply pipe 110 is located in the center of the combustor. The primary supply pipe 110 is configured in the form of a hollow tube, and the primary mixer is supplied from the rear end side of the primary supply pipe 110 .

The primary mixer supplied to the rear end of the primary supply pipe 110 is introduced into the combustion furnace 10 through the front end of the primary supply pipe 110 .

The secondary supply pipe 120 is positioned to wrap around the primary supply pipe 110 .

Specifically, the secondary supply pipe 120 is configured in the form of a hollow tube having a larger diameter than the primary supply pipe 110, and the primary supply pipe 110 is located inside the secondary supply pipe 120, and the primary supply pipe ( 110) and the secondary supply pipe 120 are positioned in the form of concentric circles.

As shown in FIGS. 5 to 7 , the tip of the secondary supply pipe 120 extends inside the combustion furnace 10 rather than the primary supply pipe 110 , and the inner peripheral surface thereof is configured in an open state.

The secondary mixer is supplied from the rear end side of the secondary supply pipe 120 .

The secondary mixer supplied to the rear end of the secondary supply pipe 120 is introduced into the combustion furnace 10 through the inner surface of the front end of the secondary supply pipe 120 .

The first perforated plate 130 is located at the tip of the primary supply pipe 110 . The first perforated plate 130 is in the form of a plate, and a plurality of first through holes 131 are positioned therein.

The first through hole 131 is formed in the axial direction through which the primary mixer is supplied from the primary supply pipe 110 , and the primary mixer supplied to the primary supply pipe 110 passes through the first through hole 131 in the axial direction of the combustor. It is supplied into the combustion furnace 10 in a straight line and is combusted.

The second perforated plate 140 is located on the inner peripheral surface of the front end of the secondary supply pipe (120). Specifically, it is located in the opened portion of the inner peripheral surface of the secondary supply pipe 120 described above.

A plurality of second through-holes 141 are located in the second perforated plate 140 . The second through hole 141 is formed on the second perforated plate 140 to surround the upper portion of the tip side of the first perforated plate 130 .

Specifically, as shown in FIGS. 5 to 7 , the second through hole 141 is formed in the form of a hole opened on the second perforated plate 140 in the tangential direction in contact with the periphery of the first perforated plate 130 .

Accordingly, the secondary mixer of the secondary supply pipe 120 is supplied to the combustion furnace 10 while passing through the second through hole 141 of the second perforated plate 140 . That is, the secondary mixer is supplied into the combustion furnace 10 while swirling and flowing in a tangential direction around the first perforated plate 130 and combustion is made.

The third perforated plate 150 is positioned to surround the periphery of the second perforated plate 140 at the tip of the secondary supply pipe 120 .

The second perforated plate 140 is located on the inner peripheral surface of the front end side of the secondary supply pipe 120 , but the third perforated plate 150 is located directly at the front end of the secondary supply pipe 120 .

A plurality of third through-holes 151 are formed in the third perforated plate 150 , and the third through-holes 151 are formed in the axial direction through which the secondary mixer is supplied from the secondary supply pipe 120 .

A part of the secondary mixer supplied to the secondary supply pipe 120 is supplied into the combustion furnace 10 through the second through hole 141 of the second perforated plate 140 , and the remaining part is the third of the third perforated plate 150 . It is supplied into the combustion furnace 10 in a straight line in the combustor axial direction from the tip side of the secondary supply pipe 120 through the three through-holes 151 and is combusted.

Next, a combustion process of the combined orbiting combustor 100 according to the second embodiment of the present invention will be described with further reference to FIG. 8 .

As shown in FIG. 8 , between the first perforated plate 130 located at the tip of the primary supply pipe 110 and the second perforated plate 140 located at the tip of the secondary supply pipe 120 , the swirling flame that forms an approximately cup shape A space S is formed.

The primary mixer supplied into the combustion furnace 10 through the primary supply pipe 110 flows through the first through hole 131 of the first perforated plate 130 , that is, the perforation direction of the first through hole 131 . As it is supplied with momentum in the axial direction, the primary flame is formed in the orbiting flame space (S). On the other hand, the secondary mixer supplied into the combustion furnace 10 through the secondary supply pipe 120 is a perforation of the second through hole 141 formed in the second perforated plate 140 located on the inner peripheral surface of the tip end of the secondary supply pipe 120 . It is supplied with momentum in the tangential direction at the upper portion of the circumference of the first perforated plate 130 along the direction.

That is, the secondary mixer forms a secondary flame while being supplied in the circumferential direction of the swirling flame space S formed between the inner peripheral surface of the first perforated plate 130 and the second perforated plate 140 through the second through hole 141 . And, the remaining part of the secondary mixer supplied to the secondary supply pipe 120 is supplied through the third through hole 151 formed in the third perforated plate 150, that is, along the perforation direction of the third through hole 151. While being supplied with momentum in the axial direction, a tertiary flame is formed on the periphery of the orbiting flame space (S).

In this way, a flame retardant structure is formed using the tangential momentum of the secondary supply pipe 120, and thermal nitrogen oxide generation is suppressed by additionally forming a flame of axial momentum through the primary supply part to eliminate hot spots due to excessive recirculation. , it is also possible to form a wider flame by forming a tertiary flame.

<Third embodiment>

Next, a composite flame combustor according to a third embodiment of the present invention will be described with reference to FIGS. 9 to 12 .

9 to 11 , the combined vortex combustor 100 according to the third embodiment of the present invention includes a primary supply pipe 110 , a secondary supply pipe 120 , a vortex unit 160 , and a perforated plate 140 . ) (corresponding to the 'second perforated plate 140' of the first and second embodiments).

In the present invention, the turning device 160 is provided at the front end of the primary supply pipe 110, unlike the above embodiment.

The primary supply pipe 110 is located in the center of the combustor. The primary supply pipe 110 is configured in the form of a hollow tube, and the primary mixer is supplied from the rear end side of the primary supply pipe 110 .

The primary mixer supplied to the rear end of the primary supply pipe 110 is introduced into the combustion furnace 10 through the front end of the primary supply pipe 110 .

The secondary supply pipe 120 is positioned to surround the circumference of the primary supply pipe 110 .

Specifically, the secondary supply pipe 120 is configured in the form of a hollow tube having a larger diameter than the primary supply pipe 110, and the primary supply pipe 110 is located inside the secondary supply pipe 120, and the primary supply pipe ( 110) and the secondary supply pipe 120 are positioned in the form of concentric circles.

As shown in FIGS. 9 to 11 , the tip of the secondary supply pipe 120 is extended to the inside of the combustion furnace 10 than the primary supply pipe 110 , and its inner peripheral surface is configured in an open state.

The secondary mixer is supplied from the rear end side of the secondary supply pipe 120 .

The secondary mixer supplied to the rear end of the secondary supply pipe 120 is introduced into the combustion furnace 10 through the inner surface of the front end of the secondary supply pipe 120 .

The swirler 160 is located at the tip of the primary supply pipe 110 , and includes a plurality of blades 161 .

The blade 161 is located at the front end of the primary supply pipe 110 . The blade 161 is inclined along the circumferential direction of the tip of the primary supply pipe 110 .

Each blade 161 is inclined at a predetermined distance from each other, so that a slit 162 having an inclined shape is formed between each blade 161 .

The primary mixer supplied into the combustion furnace 10 through the primary supply pipe 110 passes through the inclined slit 162 between the blades 161 of the swirler 160 and is burned while forming a swirling flow.

The perforated plate 140 is located on the inner peripheral surface of the tip side of the secondary supply pipe 120 . Specifically, it is located in the opened portion of the inner peripheral surface of the secondary supply pipe 120 described above.

A plurality of through-holes 141 (corresponding to the 'second through-holes 141' of the first and second embodiments) are located in the perforated plate 140 . The through hole 141 is formed on the perforated plate 140 to surround the upper portion of the tip side of the turning unit 160 .

Specifically, as shown in FIGS. 9 and 10 , the through hole 141 is in the form of an open hole along the tangential direction and the inclined direction of the slit 162 in contact with the circumference of the turning machine 160 on the perforated plate 140 . is formed

As a result, the secondary mixer of the secondary supply pipe 120 passes through the through hole 141 of the perforated plate 140 , while swirling and flowing in a tangential direction around the swirler 160 , while being supplied into the combustion furnace 10 , combustion is performed. .

Next, a combustion process of the combined orbiting combustor 100 according to the third embodiment of the present invention will be described with further reference to FIG. 12 .

As shown in FIG. 12 , a swirling flame space (S) forming an approximately cup shape between the swirler 160 positioned at the tip of the primary supply pipe 110 and the perforated plate 140 positioned at the tip of the secondary supply pipe 120 . ) is formed.

The primary mixer supplied into the combustion furnace 10 through the primary supply pipe 110 is a swirl flow having momentum in the axial and tangential directions through the slit 162 between the blades 161 of the swirler 160 . Forms a primary flame in the orbiting flame space (S) while forming.

On the other hand, the secondary mixer supplied to the inside of the combustion furnace 10 through the secondary supply pipe 120 is the second through hole 141 formed in the perforated plate 140 located on the inner circumferential surface of the tip end of the secondary supply pipe 120. Accordingly, it is supplied with momentum in the tangential direction at the upper portion of the circumference of the turning machine 130 .

That is, the secondary mixer forms a secondary flame while being supplied in the circumferential direction of the orbiting flame space S through the through hole 141 of the perforated plate 140 .

Accordingly, the flame stability is improved by using a strong turning force to form a flame for flame retardation in the linearized flame region (S).

<Fourth embodiment>

Next, with reference to FIGS. 13 to 16, a composite flame combustor according to a fourth embodiment of the present invention will be described.

13 to 15 , the composite vortex combustor 100 according to the fourth embodiment of the present invention includes a primary supply pipe 110 , a secondary supply pipe 120 , a vortex unit 160 , and a perforated plate 140 . ) is included.

In the present invention, unlike the first and second embodiments, the turning device 160 is provided at the tip of the primary supply pipe 110, and unlike the third embodiment, there is a difference in the through hole 142 formed in the perforated plate 140 there is

The primary supply pipe 110 is located in the center of the combustor. The primary supply pipe 110 is configured in the form of a hollow tube, and the primary mixer is supplied from the rear end side of the primary supply pipe 110 .

The primary mixer supplied to the rear end of the primary supply pipe 110 is introduced into the combustion furnace 10 through the front end of the primary supply pipe 110 .

The secondary supply pipe 120 is positioned to surround the circumference of the primary supply pipe 110 .

Specifically, the secondary supply pipe 120 is configured in the form of a hollow tube having a larger diameter than the primary supply pipe 110, and the primary supply pipe 110 is located inside the secondary supply pipe 120, and the primary supply pipe ( 110) and the secondary supply pipe 120 are positioned in the form of concentric circles.

13 to 15 , the tip of the secondary supply pipe 120 extends inside the combustion furnace 10 rather than the primary supply pipe 110 , and the inner peripheral surface thereof is configured in an open state.

The secondary mixer is supplied from the rear end side of the secondary supply pipe 120 .

The secondary mixer supplied to the rear end of the secondary supply pipe 120 is introduced into the combustion furnace 10 through the inner surface of the front end of the secondary supply pipe 120 .

The swirler 160 is located at the tip of the primary supply pipe 110 , and includes a plurality of blades 161 .

The blade 161 is located at the tip of the primary supply pipe 110 . The blade 161 is inclined along the circumferential direction of the tip of the primary supply pipe 110 .

Each blade 161 is inclined at a predetermined distance from each other, so that a slit 162 having an inclined shape is formed between each blade 161 .

The primary mixer supplied into the combustion furnace 10 through the primary supply pipe 110 passes through the inclined slit 162 between the blades 161 of the swirler 160 and is burned while forming a swirling flow.

The perforated plate 140 is located on the inner peripheral surface of the tip side of the secondary supply pipe 120 . Specifically, it is located in the opened portion of the inner peripheral surface of the secondary supply pipe 120 described above.

A plurality of through holes 142 are located in the perforated plate 140 . The through hole 142 is formed on the perforated plate 140 to surround the upper portion of the tip side of the turning device 160 .

13 and 14, the through hole 142 formed in the perforated plate 140 in this embodiment is formed in the form of a hole opened in the radial direction of the turning machine 160 on the perforated plate 140.

As a result, the secondary mixer of the secondary supply pipe 120 passes through the through hole 142 of the perforated plate 140 and is supplied into the combustion furnace 10 in the radial direction of the swirler 160 while combustion is made.

That is, in this embodiment, the secondary mixer forms a secondary flame while being supplied in a straight line along the radial direction of the swirler 160 rather than in a tangential direction.

Next, a combustion process of the combined orbiting combustor 100 according to the fourth embodiment of the present invention will be described with further reference to FIG. 16 .

As shown in FIG. 16 , a swirling flame space (S) forming an approximately cup shape between the swirler 160 located at the tip of the primary supply pipe 110 and the perforated plate 140 located at the tip of the secondary supply pipe 120 . ) is formed.

The primary mixer supplied into the combustion furnace 10 through the primary supply pipe 110 is a swirl flow having momentum in the axial and tangential directions through the slit 162 between the blades 161 of the swirler 160 . Forms a primary flame in the orbiting flame space (S) while forming.

On the other hand, the secondary mixer supplied into the combustion furnace 10 through the secondary supply pipe 120 is supplied in the radial direction of the upper circumference of the swirler 160 through the through hole 142 of the perforated plate 140 .

That is, the secondary mixer forms a secondary flame while being supplied while forming a linear flow having momentum in the radial direction of the orbiting flame space (S) through the through hole 142 of the perforated plate 140 .

Thereby, the flame is protected by using the tangential momentum through the primary supply part, and the flame shape can be adjusted by reducing the flame width of the primary supply part using the axial momentum passing through the secondary supply pipe 120 .

<Fifth embodiment>

Next, with reference to Figs. 17 to 20, the combined vortex combustor 100 according to a fifth embodiment of the present invention will be described.

17 to 19 , the combined orbiting combustor 100 according to the fifth embodiment of the present invention includes a primary supply pipe 110 , a secondary supply pipe 120 , a first perforated plate 130 , and a second It includes a perforated plate 140 .

In this embodiment, unlike the above embodiments, the primary supply pipe 110 is divided into a primary fuel supply pipe 111 and a primary air supply pipe 112 .

The primary fuel supply pipe 111 is located in the center of the combustor. The primary fuel supply pipe 111 is configured in the form of a hollow tube, and primary fuel is supplied from the rear end side of the primary fuel supply pipe 111 .

The primary air supply pipe 112 is positioned to surround the circumference of the primary fuel supply pipe 111 .

The primary air supply pipe 112 is configured in the form of a hollow tube having a diameter larger than that of the primary fuel supply pipe 111 , and the primary fuel supply pipe 111 is located inside the primary air supply pipe 112 .

Primary air supplied from the rear end of the primary air supply pipe 112 is introduced into the combustion furnace 10 through the primary air supply pipe 112 .

In addition, a mixture of primary fuel and primary air may be supplied to the primary air supply pipe 112 , and only primary fuel may be supplied to the primary fuel supply pipe.

At this time, the primary fuel supplied to the primary air supply pipe 112 and the fuel supplied to the primary fuel supply pipe may be supplied to have different properties. That is, the primary fuel supplied to the primary air supply pipe is liquid fuel. If so, the primary fuel supplied to the primary fuel supply pipe may be gaseous fuel, or vice versa.

The secondary supply pipe 120 is positioned to wrap around the primary air supply pipe 112 .

Specifically, the secondary supply pipe 120 is configured in the form of a hollow tube having a larger diameter than the primary air supply pipe 112 , and the primary air supply pipe 112 is located inside the secondary supply pipe 120 .

That is, the primary fuel supply pipe 111 , the primary air supply pipe 112 , and the secondary supply pipe 120 are located in concentric circles.

17 to 19 , the tip of the secondary supply pipe 120 is positioned to extend inside the combustion furnace 10 than the primary supply pipe 110 , and the inner peripheral surface thereof is configured in an open state.

The secondary mixer is supplied from the rear end side of the secondary supply pipe 120 .

The secondary mixer supplied to the rear end of the secondary supply pipe 120 is introduced into the combustion furnace 10 through the inner surface of the front end of the secondary supply pipe 120 .

The first perforated plate 130 is located at the tip of the primary air supply pipe 112 . The first perforated plate 130 is in the form of a plate, and a plurality of first through holes 131 are positioned therein.

The first through hole 131 is formed in the axial direction through which primary air is supplied from the primary air supply pipe 112 , and fuel supplied to the primary air supply pipe 112 is supplied through the first through hole 131 in the axial direction of the combustor. It is supplied into the combustion furnace 10 in a straight line, and the primary fuel supplied from the primary fuel supply unit meets in the combustion furnace 10 and combustion is made.

The second perforated plate 140 is located on the inner peripheral surface of the front end of the secondary supply pipe (120). Specifically, it is located in the opened portion of the inner peripheral surface of the secondary supply pipe 120 described above.

A plurality of second through-holes 141 are located in the second perforated plate 140 . The second through hole 141 is formed on the second perforated plate 140 to surround the upper portion of the front end of the first perforated plate 130 .

Specifically, as shown in FIGS. 17 to 19 , the second through hole 141 is formed in the form of a hole opened on the second perforated plate 140 in the tangential direction in contact with the periphery of the first perforated plate 130 .

Accordingly, the secondary mixer of the secondary supply pipe 120 is supplied to the combustion furnace 10 while passing through the second through hole 141 of the second perforated plate 140 . That is, the secondary mixer is supplied into the combustion furnace 10 while flowing in a tangential direction around the first perforated plate 130 and combustion is made.

Next, a combustion process of the combined orbiting combustor 100 according to the fifth embodiment of the present invention will be described with further reference to FIG. 20 .

As shown in FIG. 20 , between the first perforated plate 130 located at the tip of the primary supply pipe 110 and the second perforated plate 140 located at the tip of the secondary supply pipe 120 , the swirling flame that forms an approximate cup shape A space S is formed.

The primary fuel is supplied as injected into the combustion furnace 10 along the axial direction through the primary fuel supply pipe 111 .

The primary air (or primary mixer) supplied through the primary air supply pipe 112 flows through the first through hole 131 of the first perforated plate 130 , that is, the perforation direction of the first through hole 131 . It is supplied with momentum in the axial direction.

The primary air and primary fuel supplied into the combustion furnace 10 are combusted to form a primary flame.

On the other hand, the secondary mixer supplied into the combustion furnace 10 through the secondary supply pipe 120 is a perforation of the second through hole 141 formed in the second perforated plate 140 located on the inner peripheral surface of the tip end of the secondary supply pipe 120 . It is supplied with momentum in the tangential direction at the upper portion of the circumference of the first perforated plate 130 along the direction.

That is, the secondary mixer forms a secondary flame while being supplied in the circumferential direction of the swirling flame space S formed between the inner peripheral surface of the first perforated plate 130 and the second perforated plate 140 through the second through hole 141 .

Thereby, the flame retardant structure is formed using the tangential momentum of the secondary supply pipe 120, but NOx generation can be suppressed by adding axial momentum to the primary supply unit 110 for relieving hot spots due to excessive recirculation, In addition, gas or liquid fuel is additionally supplied through the primary fuel supply pipe 111 to enable mixed fuel combustion.

In addition, in each of the above embodiments, a damper 101 is provided on the side to which fuel and air are supplied, so that the primary mixer supplied to the combustion furnace 10 through the primary supply pipe 110 and the secondary supply pipe 120 and The amount of secondary mixer can be adjusted.

According to the combined vortex combustor according to the present invention, the structure is improved to divide and supply fuel and air so as to have momentum in the axial direction and tangential direction of the combustor, and by optimizing the flame structure by controlling the flow rate of fuel and air, the inside of the combustion furnace By improving the stability of the flame formed in the flame and eliminating the local high-temperature region in the flame, it is possible to induce low-emission combustion by minimizing the generation of thermal nitrogen oxides.

In addition, since the structure is simple, practical application is possible, and it is possible to improve the easiness of manufacture and reduce the manufacturing cost, as well as improve the durability and lifespan of the combustor.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. That is, a person of ordinary skill in the art to which the present invention pertains can make a number of changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications are possible. Equivalents are to be considered as falling within the scope of the present invention.

100: combined gyre combustor
101: damper
110: primary supply pipe
111: primary fuel supply pipe
112: primary air supply pipe
120: secondary supply pipe
130: first perforated plate
131: first through hole
140: second perforated plate (perforated plate)
141: second hole
142: through hole
150: third perforated plate
160: turning machine
161: blade
162: slit
S: orbiting flame space

Claims (8)

a primary supply pipe 110 to which primary air and primary fuel are mixed;
a secondary supply pipe 120 positioned to wrap around the primary supply pipe 110, the tip of which extends from the tip of the primary supply pipe 110, and through which secondary air and secondary fuel are mixed and supplied;
a first perforated plate 130 positioned at the tip of the primary supply pipe 110 and having a plurality of first through-holes 131 formed therein; and
It is positioned so as to obliquely surround the side of the first perforated plate 130 on the inner circumferential surface of the distal end of the secondary supply pipe 120, and a second through hole 141 opened along the tangential direction of the first perforated plate 130 is formed. A second perforated plate 140; including,
burner.
The method of claim 1,
It is positioned to surround the periphery of the second perforated plate 140 at the tip of the secondary supply pipe 120, and a third perforated plate 150 in which a plurality of third through holes 151 are formed; further comprising,
burner.
A primary fuel supply pipe 111 to which primary fuel is supplied, and a primary air supply pipe 112 surrounding the primary fuel supply pipe 111 and supplied by mixing primary air and primary fuel primary supply pipe 110;
It is positioned to surround the periphery of the primary air supply pipe 112, and its tip is formed to extend beyond the tips of the primary fuel supply pipe 111 and the primary air supply pipe 112, and the secondary air and secondary fuel The secondary supply pipe 120 is mixed and supplied;
a first perforated plate 130 positioned to surround the circumference of the primary fuel supply pipe 111 at the front end of the primary air supply pipe 112 and having a plurality of first through holes 131 formed therein; and
The secondary supply pipe 120 is positioned so as to obliquely surround the side of the first perforated plate 130 on the inner circumferential surface of the tip side, and a second through hole 141 opened along the tangential direction of the first perforated plate 130 is formed. A second perforated plate 140; including,
burner.
4. The method of claim 3,
The primary fuel supplied to the primary air supply pipe 112 is primary air and a fuel of a different property from the primary fuel supplied to the primary fuel supply pipe 111 is supplied,
burner.
a primary supply pipe 110 to which primary air and primary fuel are mixed;
a secondary supply pipe 120 positioned to wrap around the primary supply pipe 110, the tip of which extends from the tip of the primary supply pipe 110, and through which secondary air and secondary fuel are mixed and supplied;
a swivel 160 having a plurality of blades 161 inclined with slits 162 at predetermined intervals along the circumferential direction of the tip of the primary supply pipe 110; and
It is positioned so as to obliquely surround the swirler 160 on the inner circumferential surface of the tip side of the secondary supply pipe 120 , and has a through hole opened along the tangential direction of the swirler 160 and the direction of the slit 162 . Perforated plate to be formed; including,
burner.
a primary supply pipe 110 to which primary air and primary fuel are mixed;
a secondary supply pipe 120 positioned to wrap around the primary supply pipe 110, the tip of which extends from the tip of the primary supply pipe 110, and through which secondary air and secondary fuel are mixed and supplied;
a swivel 160 having a plurality of blades 161 inclined with slits 162 at predetermined intervals along the circumferential direction of the tip of the primary supply pipe 110; and
A perforated plate positioned to obliquely surround the swirler 160 on the inner circumferential surface of the distal end of the secondary supply pipe 120 and having a through hole opened in the radial direction of the swirler 160; including,
burner.
7. The method according to any one of claims 1 to 6,
A predetermined orbiting flame space (S) is formed between the inner peripheral surface of the front end of the primary supply pipe (110) and the tip of the secondary supply pipe (120),
burner.


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